• No results found

AK Receiver Bending

N/A
N/A
Protected

Academic year: 2021

Share "AK Receiver Bending"

Copied!
14
0
0

Loading.... (view fulltext now)

Full text

(1)

AK Receiver Bending

AK Receiver Bending

From a Tapco Flat

From a Tapco Flat

A tutorial by 1952Sniper  A tutorial by 1952Sniper 

February 2006 February 2006

(2)

(originally posted on

(originally posted on http://www.ssboards.!o"http://www.ssboards.!o" by 1952Sniper# by 1952Sniper#

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ % de!ided to write t

% de!ided to write this tutorial a&ter his tutorial a&ter ha'ing spent a day and a hal& bending re!eiha'ing spent a day and a hal& bending re!ei'ers. 'ers. %t "ight be a%t "ight be a help to those o& y

help to those o& you who are interested in bending you who are interested in bending your own re!ei'ers &ro" a &latour own re!ei'ers &ro" a &lat. . ysel& andysel& and another &oru" "e"ber (%)ll let hi" !hi"e in i& he

another &oru" "e"ber (%)ll let hi" !hi"e in i& he wants to identi&y hi"sel&# did a whole pro'erbialwants to identi&y hi"sel&# did a whole pro'erbial s***$load o& the"+ and % now now "ore about the pro!ess than % e'er wanted to+ ,-,.

s***$load o& the"+ and % now now "ore about the pro!ess than % e'er wanted to+ ,-,. % won)t pretend it)s

% won)t pretend it)s the be$all end$all o& bending rthe be$all end$all o& bending re!ei'ers. e!ei'ers. %t)s ust "%t)s ust "y eperien!e+ and a good startingy eperien!e+ and a good starting  point.

 point. ou guys that ha'e used other "ethods and other bending &itures+ &eel &ree to !hi"e in andou guys that ha'e used other "ethods and other bending &itures+ &eel &ree to !hi"e in and add in&o.

add in&o.

For starters+ it)s a lot o& &

For starters+ it)s a lot o& &un. un. %& you)re only bending a !ouple+ it)s a relati'ely si"ple tas that should%& you)re only bending a !ouple+ it)s a relati'ely si"ple tas that should tae no ti"e at all.

tae no ti"e at all. %& you)re doing as "any as we did+ though+ it)s a lot o& wor and needs to be well%& you)re doing as "any as we did+ though+ it)s a lot o& wor and needs to be well  planned.

 planned. ou should !ount on &atigue be!o"ing an issue. ou should !ount on &atigue be!o"ing an issue. i'e yoursel& plenty o& ti"e &or breas.i'e yoursel& plenty o& ti"e &or breas. And be aware o& when you)re gett

And be aware o& when you)re getting tired+ be!ause that)s when a!!idents sing tired+ be!ause that)s when a!!idents start to happen. tart to happen. e ha'ee ha'e the hand inuries and sore li"bs to pro'e

the hand inuries and sore li"bs to pro'e it.it. 3he pro!ess we used too right at

3he pro!ess we used too right at 15 "inutes to go &ro" a &lat to 15 "inutes to go &ro" a &lat to a bent re!ei'er+ &ro" start to &inish.a bent re!ei'er+ &ro" start to &inish. 4ut we a'eraged about  re!ei'ers &

4ut we a'eraged about  re!ei'ers &or e'ery  hours spent. or e'ery  hours spent. 3hat in!ludes breas+ re$organi7ing t3hat in!ludes breas+ re$organi7ing tools+ools+  periodi! !leanup+ et!.+ without &eeling lie we had to rush so "u!h that our 8uality le'el had to su&&er.  periodi! !leanup+ et!.+ without &eeling lie we had to rush so "u!h that our 8uality le'el had to su&&er.

4ending a &lat into a re!ei'er shou

4ending a &lat into a re!ei'er should generally re8uire the &ollowing steps:ld generally re8uire the &ollowing steps: 1. Asse"ble the inside die around the

1. Asse"ble the inside die around the &lat&lat 2. rease the hell out o& e'

2. rease the hell out o& e'erythingerything . ress it into the outer &or"

. ress it into the outer &or" . S8uee7e the asse"bly in

. S8uee7e the asse"bly in a 'ise to eli"inate possible bowing in the "iddlea 'ise to eli"inate possible bowing in the "iddle 5. ;a""er or otherwise bend o'er the upper rails

5. ;a""er or otherwise bend o'er the upper rails

6. %n'ert the asse"bly and no! out the inside die and re!ei'er  6. %n'ert the asse"bly and no! out the inside die and re!ei'er  <. =isasse"ble inside &or" and no! re!ei'er o&& o&

<. =isasse"ble inside &or" and no! re!ei'er o&& o& itit %)ll go into detai

%)ll go into detail on ea!h step. l on ea!h step. % should note that not % should note that not all bending igs (&iall bending igs (&itures# are !reated e8ual.tures# are !reated e8ual. 3here are a lot o& di&&erent designs out

3here are a lot o& di&&erent designs out there+ although they al"ost all basi!ally wor using the there+ although they al"ost all basi!ally wor using the sa"esa"e  prin!iple.

 prin!iple. And i& your &iture is !reated to the proper di"ensions+ it sAnd i& your &iture is !reated to the proper di"ensions+ it should yield the sa"e results nohould yield the sa"e results no "atter how it)s

"atter how it)s put together. put together. 3he result+ o& !ourse+ 3he result+ o& !ourse+ being a bent re!ei'er that)s ready &being a bent re!ei'er that)s ready &oror &itting/tri"

&itting/tri""ing and "ing and asse"bly to a passe"bly to a parts it.arts it.

3he &iture we used was one that % bought &ro" a "e"ber o& an A> building board+ and is based on 3he &iture we used was one that % bought &ro" a "e"ber o& an A> building board+ and is based on the ernelrin design (&or those o& you who are &a"iliar with that user

the ernelrin design (&or those o& you who are &a"iliar with that userna"e#. na"e#. %t wors great and is%t wors great and is robust enough to last through a lot o& bends.

robust enough to last through a lot o& bends. 4elow is a pi!ture o& the inside &or" (the die# and its4elow is a pi!ture o& the inside &or" (the die# and its asso!iated pie!es+ net to one o&

asso!iated pie!es+ net to one o& the 3ap!o &lats we were the 3ap!o &lats we were about to bend. about to bend. %)ll apologi7e in ad'an!e &or%)ll apologi7e in ad'an!e &or the !rappy pi!tures.

the !rappy pi!tures. % had to use "y ol% had to use "y old digital !a"era be!ause "y good one was out d digital !a"era be!ause "y good one was out o& ui!e and %o& ui!e and % !ouldn)t &ind the !harger.

!ouldn)t &ind the !harger. Anyway+ in the pi!ture below yAnyway+ in the pi!ture below you !an see the upper part o& the ou !an see the upper part o& the die+ thedie+ the lower plate that sandwi!hes the &lat inside+  bo

lower plate that sandwi!hes the &lat inside+  bo lts that !la"p it all together+ and two aligner pins withlts that !la"p it all together+ and two aligner pins with  brass nobs on the".

(3)

%)ll also pause here to gi'e !redit %)ll also pause here to gi'e !redit to the gentle"an that built this to the gentle"an that built this  bending &iture and sold it to  bending &iture and sold it to

"e.

"e. ;e has ";e has "ore &or sore &or sale and isale and is an etre"ely help&ul and

an etre"ely help&ul and &riendly

&riendly guy. guy. oes by oes by thethe userna"e s"ittyg o'er on userna"e s"ittyg o'er on gun!o.net+ and he has epressed gun!o.net+ and he has epressed interest in selling the" on this interest in selling the" on this  board too.

 board too. %n &a!t+ % see that he)s%n &a!t+ % see that he)s a "e"ber

a "e"ber here. here. So loo &So loo &or aor a  post &ro" hi" in the trade/sale &oru"s.

 post &ro" hi" in the trade/sale &oru"s. ;is bending &iture wored well &or "e and although %;is bending &iture wored well &or "e and although % ha'en)t used any other types+ % wi

ha'en)t used any other types+ % will say that thill say that this one "ore than "et "y needs. s one "ore than "et "y needs. % now se'eral o& y% now se'eral o& youou A> builders are looing &or a bending

A> builders are looing &or a bending &iture+ and % !an tell you &iture+ and % !an tell you that s"ittyg will do his best to "aethat s"ittyg will do his best to "ae sure you)re satis&i

sure you)re satis&ied and answer any 8uestions yed and answer any 8uestions you ha'e. ou ha'e. Support &or a sold prSupport &or a sold produ!t goes a long wayodu!t goes a long way with "e+ and he)ll de&ini

with "e+ and he)ll de&initely gi'e support &or hitely gi'e support &or his produ!t. s produ!t. And by the way+ %)" not beiAnd by the way+ %)" not being paid &orng paid &or endorsing his bending &iture.

endorsing his bending &iture. % ust thin he)s % ust thin he)s got a good produ!t at a good pri!e+ and got a good produ!t at a good pri!e+ and pro'ides goodpro'ides good ser'i!e.

ser'i!e. A? all arA? all around+ and % highly ound+ and % highly re!o""end his bending re!o""end his bending &iture.&iture.

Step 1: Assemble the die around the flat Step 1: Assemble the die around the flat

-n this parti!ular bending &iture design+ you install the aligner pins through the botto" o& the -n this parti!ular bending &iture design+ you install the aligner pins through the botto" o& the  botto" plate+ then through the aligner holes on the &lat (whi!h are the s"all holes at the 'ery &ront  botto" plate+ then through the aligner holes on the &lat (whi!h are the s"all holes at the 'ery &ront

and rear

and rear o& the o& the &lat#. &lat#. 3his is3his is then lined up with the botto" o& then lined up with the botto" o& the die+ and the aligner pins are the die+ and the aligner pins are inserted there

inserted there as well. as well. All All   pie!es will be lined up  pie!es will be lined up  per&e!tly.

 per&e!tly. @o "easuring or@o "easuring or &iddling

&iddling ne!essary. ne!essary. 3he bolt3he boltss are then inserted through the top are then inserted through the top o& the die and they are threaded o& the die and they are threaded into t

into the botto" he botto" plate. plate. %t)s%t)s i"portant to tighten these bolts i"portant to tighten these bolts &airly tight to ensure that the &lat &airly tight to ensure that the &lat stays

stays put. put. 3he  3he  bolts bolts rea!hrea!h through the eisting openings in the &lat (the

through the eisting openings in the &lat (the pistol grip s!rew hole+ the trigger hole+ and pistol grip s!rew hole+ the trigger hole+ and two throughtwo through the "ag well

the "ag well opening#. opening#. 3hey si"ply draw 3hey si"ply draw the botto" plate the botto" plate tight to the tight to the die. die. 3hen the aligner 3hen the aligner pins arepins are re"o'ed.

re"o'ed. -n!e the aligner pins are re"-n!e the aligner pins are re"o'ed+ the only thing holding the &lat o'ed+ the only thing holding the &lat in align"ent is thein align"ent is the !o"pression o& the bolts

!o"pression o& the bolts. . So tor8ue the" down pretty good+ but So tor8ue the" down pretty good+ but not tight enough to strinot tight enough to strip threads.p threads. ust a &ir" tug with a so!et wren!h is what

ust a &ir" tug with a so!et wren!h is what % did.% did. hen you get the botto"

(4)

 @ote that you !an see the botto"s o& the  bolts+ and the aligner pins are still in pla!e.

 @ote that you !an see the botto"s o& the  bolts+ and the aligner pins are still in pla!e. 3his botto"3his botto"  plate ser'es se'eral &un!tions as &ar as % !an tell

 plate ser'es se'eral &un!tions as &ar as % !an tell. . %t eeps the botto" o& the &lat positioned properly.%t eeps the botto" o& the &lat positioned properly. %t also eeps the botto" &ro" bowing out when the sides are bent+ gi'ing ni!e !risp !orners.

%t also eeps the botto" &ro" bowing out when the sides are bent+ gi'ing ni!e !risp !orners. %t also%t also ser'es as a guide inside the &or" as it)s pressed i

ser'es as a guide inside the &or" as it)s pressed in. n. 3he width o& the botto" plate is the sa"e as the3he width o& the botto" plate is the sa"e as the width o& the outside o&

width o& the outside o& your re!ei'er a&ter bending. your re!ei'er a&ter bending. So the re!ei'er walls So the re!ei'er walls B&ollowB the botto" plateB&ollowB the botto" plate into the ig.

into the ig.

Step 2: Grease all contact surfaces of the bending fiture Step 2: Grease all contact surfaces of the bending fiture

A&ter the aligner pins are re"o'ed+ you)ll want

A&ter the aligner pins are re"o'ed+ you)ll want to grease the hell out o& the to grease the hell out o& the botto" o& the &lat+ where itbotto" o& the &lat+ where it will BrideB t

will BrideB the outside &or" he outside &or" when it)s beiwhen it)s being bended. ng bended. e used obil e used obil 1 syntheti! grease. 1 syntheti! grease. %t)s red i%t)s red inn !olor+ as y

!olor+ as you !an see below. ou !an see below. -thers use ale -thers use ale grease or other grease or other inds o& grease. inds o& grease. hate'er &loats yhate'er &loats yourour  boat.

 boat. ust "ae sure it)s a good 8uality grease that lubri!ates wellust "ae sure it)s a good 8uality grease that lubri!ates well..

And here)s a pi!ture o& the top And here)s a pi!ture o& the top o& the die with the &lat installed. o& the die with the &lat installed. %t is i"portant to ,%;3, %t is i"portant to ,%;3, grease the !onta!t sur&a!es grease the !onta!t sur&a!es  between the inside die and the  between the inside die and the

inside o& the re!ei'er. inside o& the re!ei'er.

-therwise you !ould ha'e a hell -therwise you !ould ha'e a hell o& a ti"e getting the re!ei'er o&& o& a ti"e getting the re!ei'er o&& o& it later a&ter it)s been bent o& it later a&ter it)s been bent around all  !orners o& the die. around all  !orners o& the die. % only tried it on!e without % only tried it on!e without grease on the inside o& the grease on the inside o& the re!ei'er+ and had a hard ti"e. re!ei'er+ and had a hard ti"e. So % !ontinued to grease it and So % !ontinued to grease it and didn)t ha'e any "ore proble"s. didn)t ha'e any "ore proble"s. 4ut do it lightly+ so it isn)t 4ut do it lightly+ so it isn)t so"ething that)s ha'ing to be so"ething that)s ha'ing to be s8uee7ed out when you press s8uee7ed out when you press the die into the outside &or". the die into the outside &or".

%)ll also tae this opportunity to point out the

%)ll also tae this opportunity to point out the inletting on the die &or the "aga7ine inletting on the die &or the "aga7ine stabili7er di"ples+stabili7er di"ples+ and note that they)re slotted so the

and note that they)re slotted so the di"ples !an ride in that !hannel di"ples !an ride in that !hannel later+ as you re"o'e thelater+ as you re"o'e the !o"pleted re!ei'er &ro" the di

!o"pleted re!ei'er &ro" the die. e. 3his die also had an i3his die also had an inletted area &or the di"plnletted area &or the di"ple at the sele!tore at the sele!tor le'er.

le'er. %t did not ha'e any inletting &or the C$ ais di"ples or the sele!tor le'er not!h or the bulge%t did not ha'e any inletting &or the C$ ais di"ples or the sele!tor le'er not!h or the bulge around the le&t side s

around the le&t side sele!tor le'er hole. ele!tor le'er hole. 3he new 3ap!o &lats ha'e all 3he new 3ap!o &lats ha'e all these di"ples on the"+ but these di"ples on the"+ but theythey didn)t see" to be a&&e!ted in the

didn)t see" to be a&&e!ted in the bending pro!ess and they &ared bending pro!ess and they &ared ust &ine.ust &ine. So+ be&ore "o'ing on to the t

So+ be&ore "o'ing on to the third step+ you)ll want to hird step+ you)ll want to grease the outside &or" grease the outside &or" as well. as well. @ot only on@ot only on top where the &lat will !onta!t it when

top where the &lat will !onta!t it when you start bending+ but espe!ially at the you start bending+ but espe!ially at the !orners o& the &or" that!orners o& the &or" that "ae the &old+ as well

(5)

you will get s!arring on the you will get s!arring on the outside o& your re!ei'er as it outside o& your re!ei'er as it slides down inside the &or". slides down inside the &or". ou !an see that % ha'e the top ou !an see that % ha'e the top and insides o& the &or" greased+ and insides o& the &or" greased+ with the asse"bled die sitting with the asse"bled die sitting upside down+ ready to be upside down+ ready to be &lipped o'er and pla!ed into it. &lipped o'er and pla!ed into it. 3oo "u!h grease is better than 3oo "u!h grease is better than not

not enough. enough. 4e 4e generous.generous.

Step !: Bend the sides of the flat up Step !: Bend the sides of the flat up

la!e the asse"bled die into the top

la!e the asse"bled die into the top o& the outside &or" and !enter it in the o& the outside &or" and !enter it in the &or" so you)re not too&or" so you)re not too !lose to the

!lose to the ends. ends. 3hen !enter the enti3hen !enter the entire asse"bly under re asse"bly under the ra". the ra". =ouble !he! that y=ouble !he! that your alignerour aligner  pins are re"o'ed and that e'erything is ready to go.

(6)

 @ow snug up the ra" to the top+  @ow snug up the ra" to the top+

and start

and start pressing down. pressing down. %& it%& it)s)s !entered !orre!tly+ both sides !entered !orre!tly+ both sides should start to &old up at the should start to &old up at the sa"e rate+ as you see below. sa"e rate+ as you see below.

So"eti"es the sides will gently So"eti"es the sides will gently &old up &lush to the die+ but in &old up &lush to the die+ but in "ost !ases % &ound that they "ost !ases % &ound that they would rea!h a point where they would rea!h a point where they BsnapB to the sides+ and the BsnapB to the sides+ and the whole shop press goes whole shop press goes

SD-%@E 3hat)s SD-%@E 3hat)s &ine.

&ine. ust be ust be aware o& aware o& this+ andthis+ and go slowly when it)s !lose to the go slowly when it)s !lose to the  point.

 point. As you pro!eed &urther+As you pro!eed &urther+ the sides should be straight up the sides should be straight up 'erti!ally in the &or"+ tight 'erti!ally in the &or"+ tight against the inside die. against the inside die.

(7)

>eep pressing it down into the &or" until the

>eep pressing it down into the &or" until the top o& the die is at least &lush with the top o& the die is at least &lush with the top o& the outsidetop o& the outside &or".

&or". So"eti"es+ as So"eti"es+ as the die is the die is pressed in+ one pressed in+ one end will tend will tend to go down &end to go down &aster than the aster than the other. other. % ept% ept sear!hing &or a Bsweet spotB on the

sear!hing &or a Bsweet spotB on the top o& the die that would entop o& the die that would ensure e'en plunging lengthwise+ butsure e'en plunging lengthwise+ but ea!h &lat would go in di&&erently.

ea!h &lat would go in di&&erently. %& one end sins down &irst+ you)ll need to reposition the ra" to try%& one end sins down &irst+ you)ll need to reposition the ra" to try to get the other si

to get the other side down. de down. ith this partith this parti!ular bending &iture+ the bolt heads i!ular bending &iture+ the bolt heads on top presented aon top presented a  proble".

 proble". % didn)t want to be pressing on the bolt heads+ so % had li"ited roo" between the "iddle% didn)t want to be pressing on the bolt heads+ so % had li"ited roo" between the "iddle  bolts in whi!h to pla!e the ra".

 bolts in whi!h to pla!e the ra". hen one end would sin &aster than the other+ we would ha'e tohen one end would sin &aster than the other+ we would ha'e to  pull the entire asse"bly and turn it 90 degrees so the ra" !ould get all the way to the end o& the die  pull the entire asse"bly and turn it 90 degrees so the ra" !ould get all the way to the end o& the die

(the shop press &ra"e wasn)t wide enough to si"ply shi&t

(the shop press &ra"e wasn)t wide enough to si"ply shi&t the &iture to the side &ar enough#. the &iture to the side &ar enough#. So then+So then+  pressing on the end o& the die and using a pie!e o& bar sto! to shi" up and ensure that the ra" wasn)t  pressing on the end o& the die and using a pie!e o& bar sto! to shi" up and ensure that the ra" wasn)t

tou!hing a bolt head+ we !ould press

tou!hing a bolt head+ we !ould press the high end down into the &or"the high end down into the &or". . %t was a si"%t was a si"ple enough way tople enough way to do it and wored well.

do it and wored well. %n the pi!ture below+ y

%n the pi!ture below+ you)ll see what %)" taling about. ou)ll see what %)" taling about. %n this !ase+ the di%n this !ase+ the die went into the &or" e'enle went into the &or" e'enly.y. 4ut sin!e the rear o& the re!ei'er

4ut sin!e the rear o& the re!ei'er is taller than the &ront+ it be!o"es ob'ious that the is taller than the &ront+ it be!o"es ob'ious that the rear end o& therear end o& the die needs to go down &urther

die needs to go down &urther into the &or" than the into the &or" than the &ront. &ront. So that)s what we)re doiSo that)s what we)re doing here+ trying tong here+ trying to get it so the top o& our

get it so the top o& our bent re!ei'er is e'en.bent re!ei'er is e'en.

As % said+ ea!h &lat would go As % said+ ea!h &lat would go into the &or" di&&erently. into the &or" di&&erently. So"eti"es+ when one end was So"eti"es+ when one end was riding high and we)d go to press riding high and we)d go to press that end in+ the other end would that end in+ the other end would start li&ting ba! up slightly. start li&ting ba! up slightly. -ther ti

-ther ti"es it "es it wouldn)t. wouldn)t. ustust  play it by ear and adust your  play it by ear and adust your

ra" position as ne!essary to get ra" position as ne!essary to get the die

the die down into down into the &or". the &or". %t%t really goes pretty 8ui!ly+ so don)t start thining this is a

really goes pretty 8ui!ly+ so don)t start thining this is a "aor deal."aor deal. -n!e the die is pressed down with the

-n!e the die is pressed down with the top !orners about &lush with the outside &or"+ it)s good top !orners about &lush with the outside &or"+ it)s good to go.to go. 3ae it out o& the press.

3ae it out o& the press.

Step ": #ompress the sides of the form Step ": #ompress the sides of the form

=epending on the design o& your outside &or"+ you "ay eperien!e bowing in the "iddle during the =epending on the design o& your outside &or"+ you "ay eperien!e bowing in the "iddle during the  pressing operation.

 pressing operation. % did noti!e a s"all gap in ours+ right at the "iddle o& the re!ei'er. % did noti!e a s"all gap in ours+ right at the "iddle o& the re!ei'er. And % "eanAnd % "ean s"all lie perhaps a !ouple

s"all lie perhaps a !ouple thousandths o& an in!h. thousandths o& an in!h. So"e designs "ay not ha'e a noti!eable gap+ butSo"e designs "ay not ha'e a noti!eable gap+ but %)d bet you would &ind that it bowed in the "iddle i& you too detailed "easure"ents.

%)d bet you would &ind that it bowed in the "iddle i& you too detailed "easure"ents. %t)s sa&e to%t)s sa&e to assu"e that all &or"s will bow.

assu"e that all &or"s will bow. So the easiest thing to do is ust tae your entire asse"So the easiest thing to do is ust tae your entire asse"bly with thebly with the die still in it+ and s8uee7e it tightly in a

die still in it+ and s8uee7e it tightly in a 'ise to !o"press the sides and sharpen 'ise to !o"press the sides and sharpen up your botto"up your botto" !orners o& y

!orners o& your re!ei'er. our re!ei'er. ou)ll see any ou)ll see any gaps !lose right gaps !lose right up+ and the grease up+ and the grease will s8uee7e out. will s8uee7e out. 3hat3hat "eans it)s good to go.

(8)

Step $: Bend the upper rails Step $: Bend the upper rails

3here are 'arious ways o&

3here are 'arious ways o& doing this. doing this. So"e bending &itures are sold So"e bending &itures are sold with an a!!essory that uses with an a!!essory that uses thethe  press to &old the top rails o'er.  press to &old the top rails o'er. So"e people si"ply ha""er So"e people si"ply ha""er the" o'er with a ha""er+ the" o'er with a ha""er+ woring &ro" one end to the woring &ro" one end to the other and then s"a!ing on top other and then s"a!ing on top o& the die on!e the

o& the die on!e the rails arerails are &olded o'er+ to get out the &olded o'er+ to get out the lu"ps.

lu"ps. y y partner !a"partner !a"e upe up with the Bworing barB as a with the Bworing barB as a great way to ha""er the upper great way to ha""er the upper rails

rails o'er without o'er without lu"ps. lu"ps. AndAnd it wored

it wored lie a lie a !ha"p. !ha"p. %t)s ust%t)s ust a long pie!e o& &lat bar

a long pie!e o& &lat bar withwith handles welded

handles welded to itto it. . ouou

ha""er on the woring bar and ha""er on the woring bar and it translates the &or!e to the rails it translates the &or!e to the rails in a uni&or"

in a uni&or" "anner to get "anner to get ni!e s"ooth bends ni!e s"ooth bends with !risp with !risp !orners. !orners. 3his re8uires 3his re8uires two people. two people. -ne-ne  person stands on one side o& the ben!h 'ise and holds the woring bar by the handles so that it)s  person stands on one side o& the ben!h 'ise and holds the woring bar by the handles so that it)s

al"ost &lat on top o& the outside &or"+ with one

al"ost &lat on top o& the outside &or"+ with one side o& the &lat bar against the rail on side o& the &lat bar against the rail on the opposite sidethe opposite side o& the 'ise &ro"

o& the 'ise &ro" where he)s standing. where he)s standing. 3he other person+ standing opposite t3he other person+ standing opposite the &irst person+ s"he &irst person+ s"a!s thea!s the &lat bar+ starting at one end and

&lat bar+ starting at one end and woring to the other end.woring to the other end.

 @ote that in this pi!ture+ it)s ust being held in pla!e with one hand &or display

 @ote that in this pi!ture+ it)s ust being held in pla!e with one hand &or display. . 3he bar holder needs3he bar holder needs to be dire!tly behind the 'ise+ holding both pipe handles to align it properly as the ha""er "an to be dire!tly behind the 'ise+ holding both pipe handles to align it properly as the ha""er "an "aes ea!h stroe.

(9)

3his needs to be done with the bending &iture !la"ped in the 'ise+ not only to eep the sides o& the 3his needs to be done with the bending &iture !la"ped in the 'ise+ not only to eep the sides o& the re!ei'er tight against the die &or a go

re!ei'er tight against the die &or a good uni&or" bend+ but to eep od uni&or" bend+ but to eep the die &ro" slipping down in thethe die &ro" slipping down in the outside &or".

outside &or". As the upper rails sAs the upper rails start to bend o'er+ the perstart to bend o'er+ the person holding the woring bar needs to on holding the woring bar needs to eepeep it at the sa"e angle as the

it at the sa"e angle as the rail until the bar is 'erti!al ("eaning that the rails are laying rail until the bar is 'erti!al ("eaning that the rails are laying &lush on top o&&lush on top o& the die#.

the die#. 3he ha""er operator 3he ha""er operator ust wors ust wors up and down the up and down the woring bar. woring bar. e used a 5$le used a 5$lb sledgeb sledge ha""er and % &ound it generally too "e 5 stries along the length o& the bar &or ea!h BpassB.

ha""er and % &ound it generally too "e 5 stries along the length o& the bar &or ea!h BpassB. A&ter %A&ter % "ade a pass+ the angle would be !hanged and %

"ade a pass+ the angle would be !hanged and %)d "ae another pass. )d "ae another pass. %t usually too us %t usually too us  passes to passes to get the rails laying down &lat on top o& the die.

get the rails laying down &lat on top o& the die. 3hat)s only 15 ha""er stries on the woring bar &or3hat)s only 15 ha""er stries on the woring bar &or ea!h rail.

ea!h rail. hen the rail was hen the rail was laying &lush on top+ we)d "laying &lush on top+ we)d "ae one "ore pass B&or good "easae one "ore pass B&or good "easureB+ureB+ "aing "ore lie  str

(10)

3he tri! is ust to tae your ti"e+ "ae

3he tri! is ust to tae your ti"e+ "ae good solid ha""er stries with a hea'y good solid ha""er stries with a hea'y sledge ha""er+ andsledge ha""er+ and to eep the woring bar at t

to eep the woring bar at the !orre!t angle. he !orre!t angle. And depending on how "any re!ei'ers yAnd depending on how "any re!ei'ers you)re "aing+ou)re "aing+  be prepared to ha'e to repair your woring bar.

 be prepared to ha'e to repair your woring bar. -urs was beat all to hell on the top. -urs was beat all to hell on the top. % was ha'ing so% was ha'ing so "u!h &un+ % was 'ery eager on the sledge ha""er. :$#

"u!h &un+ % was 'ery eager on the sledge ha""er. :$#

%n retrospe!t+ the woring bar would ha'e been better i& the handles were at about a 120 degree angle %n retrospe!t+ the woring bar would ha'e been better i& the handles were at about a 120 degree angle &ro" the &lat bar instead o& 90 degrees as ours were.

&ro" the &lat bar instead o& 90 degrees as ours were. hen striing near the end o& the bar+ % had tohen striing near the end o& the bar+ % had to  be !are&ul not to hit "y asso!iate)s hands as he was holding the handles.

 be !are&ul not to hit "y asso!iate)s hands as he was holding the handles. So+ i& you want to "ae aSo+ i& you want to "ae a woring bar &or the upper rails+ eep

woring bar &or the upper rails+ eep sa&ety in "ind. and angle the sa&ety in "ind. and angle the handles out away &ro" the "iddlehandles out away &ro" the "iddle where the ha""er will be striing.

where the ha""er will be striing. %t)s also a good idea to

%t)s also a good idea to ha'e a step stool or so"e way ha'e a step stool or so"e way o& getting higher abo'e your 'ise o& getting higher abo'e your 'ise as the angleas the angle !hanges on the upper

!hanges on the upper rails. rails. ou don)t want tou don)t want to be swinging a o be swinging a sledge ha""er that sledge ha""er that high. high. et abo'e itet abo'e it so you ust ha'e to li&t it and "ostly let gra'ity do the ob when it)s at t

so you ust ha'e to li&t it and "ostly let gra'ity do the ob when it)s at that angle. hat angle. %t)ll "ae the ob a%t)ll "ae the ob a lot easier and you)ll get "ore uni&or"+ solid blows.

lot easier and you)ll get "ore uni&or"+ solid blows. And this is one o& the steps where &atigue will getAnd this is one o& the steps where &atigue will get you.

you. % busted "y nu!le a &ew % busted "y nu!le a &ew ti"es when % was ti"es when % was tired and "ade a glan!ing blow o&& tired and "ade a glan!ing blow o&& the woringthe woring  bar.

 bar. Sa&ety &irst+ ya now.Sa&ety &irst+ ya now.

Step %: Remove the die from the outside form Step %: Remove the die from the outside form

3his is &airly strai

3his is &airly straight&orward. ght&orward. -n!e the upper rails are bent and pass your 8uality !ontrol inspe!tion+-n!e the upper rails are bent and pass your 8uality !ontrol inspe!tion+ un!la"p the &iture &ro" the 'ise.

un!la"p the &iture &ro" the 'ise. -pen the aws o& the 'ise a bit wider+ turn the &iture upside down-pen the aws o& the 'ise a bit wider+ turn the &iture upside down and set it on top o&

(11)

the die ba! out.

the die ba! out. %t should start %t should start !o"ing out o& the outside &or" !o"ing out o& the outside &or" and go between the open aws o& tand go between the open aws o& thehe 'ise.

'ise. ,ay a pad o& so"e sort ,ay a pad o& so"e sort in there so i& iin there so i& it &alls out it t &alls out it won)t get dinged up. won)t get dinged up. =on)t put your hand=on)t put your hand under there to !at!h it as

under there to !at!h it as your buddy ha""ers it outE your buddy ha""ers it outE As "e about how "y &inger As "e about how "y &inger got s"ushedgot s"ushed when the 5$lb sledge ha""er and the weight o& the die landed on it.

when the 5$lb sledge ha""er and the weight o& the die landed on it.

And eep in "ind+ when you)re doing this+ you)re ha""ering on the underside o& the botto" plate o& And eep in "ind+ when you)re doing this+ you)re ha""ering on the underside o& the botto" plate o& the die.

the die. %& your bolts that !in!h up the &lat inside the die are protruding &ro" the botto" o& thi%& your bolts that !in!h up the &lat inside the die are protruding &ro" the botto" o& thiss  botto" plate (as ours were by ust about 1/B#+ you)ll want to be !are&ul not to hit the" wit

 botto" plate (as ours were by ust about 1/B#+ you)ll want to be !are&ul not to hit the" with your barh your bar sto! when ha""ering out the die &ro" the outside &or".

sto! when ha""ering out the die &ro" the outside &or".

hen the inside die !o"es out+ hen the inside die !o"es out+ you will noti!e that the sides you will noti!e that the sides tend to spring ba! ust a tad tend to spring ba! ust a tad away &ro"

away &ro" the &or". the &or". 3his is3his is nor"al+ and

nor"al+ and to be to be epe!ted. epe!ted. %t%t will be pulled ba! together at will be pulled ba! together at the trunnion lo!ations when you the trunnion lo!ations when you  build this into an A> ri&le+ with  build this into an A> ri&le+ with

the ri'ets or s!rews (or the ri'ets or s!rews (or

whate'er you)re using#+ as well whate'er you)re using#+ as well as at

as at the !enter the !enter support. support. SoSo don)t worry about it.

don)t worry about it.

ou)ll also see in this pi!ture+ ou)ll also see in this pi!ture+ that there is grease where the that there is grease where the top rail

top rails were s were &olded o'er. &olded o'er. 3his3his "aes a handy gauge o& your "aes a handy gauge o& your upper rail bending pro!edure. upper rail bending pro!edure. %& you properly greased the %& you properly greased the area+ it will s8uee7e the grease area+ it will s8uee7e the grease out when the upper rails are out when the upper rails are tight on the top o& the tight on the top o& the die.die.

Step &: Remove the receiver from the die Step &: Remove the receiver from the die

(12)

So now the die is out

So now the die is out o& the outside &or"o& the outside &or". . ou !an re"o'e the bolts to ou !an re"o'e the bolts to un!la"p the re!ei'er &ro" tun!la"p the re!ei'er &ro" thehe die+ whi!h should release the bott

die+ whi!h should release the botto" plate. o" plate. ou)ll also noti!e that+ oddly enough+ you)ll also noti!e that+ oddly enough+ your &lat a!tuallyour &lat a!tually loos a lot lie an A> re!ei'er.

loos a lot lie an A> re!ei'er.

 @ow+ the botto" plate is released and you si"ply need to re"o'e the die &ro" inside the re!ei'er.  @ow+ the botto" plate is released and you si"ply need to re"o'e the die &ro" inside the re!ei'er.

3he ni!e thing about the

3he ni!e thing about the bending &iture we used was that the bending &iture we used was that the top o& the die had top o& the die had a raised strip downa raised strip down the "iddle that was parallel with the botto".

the "iddle that was parallel with the botto". So this "ade a handy pla!e to !la"p in a 'ise as shownSo this "ade a handy pla!e to !la"p in a 'ise as shown  below+ and tae another pie!e o& bar sto! and tap the re!ei'er o&& the &or" slowly+ "aing sure not  below+ and tae another pie!e o& bar sto! and tap the re!ei'er o&& the &or" slowly+ "aing sure not

to de&or" any "etal.

to de&or" any "etal. %& you greased it properly+ it should !o"e o&& with lit%& you greased it properly+ it should !o"e o&& with little e&&ort and only lighttle e&&ort and only light taps.

taps. e tapped on the rear end o& e tapped on the rear end o& the re!ei'er where it)s the re!ei'er where it)s a ni!e wide bearing sur&a!e+ to a ni!e wide bearing sur&a!e+ to "ini"i7e"ini"i7e any proble"s.

any proble"s.

Summar' and miscellaneous comments Summar' and miscellaneous comments

(13)

3hat)s itE

3hat)s itE ou)re doneE ou)re doneE ou should ou should ha'e a bent ha'e a bent re!ei'er now. re!ei'er now. ipe o&& ipe o&& all the all the grease and get grease and get toto  building your A>.

 building your A>. As % said at the beginning+ this pro!ess should tae 15$20 "inutes on!e you getAs % said at the beginning+ this pro!ess should tae 15$20 "inutes on!e you get the hang o& it.

the hang o& it. 3he really hard wor is 3he really hard wor is already done &or you i& yalready done &or you i& you)re using a 3ap!o &lat that alou)re using a 3ap!o &lat that alreadyready has all the holes in it.

has all the holes in it. % !hose to use &lats that didn)t ha'e trunnion holes in the" already be!ause o&% !hose to use &lats that didn)t ha'e trunnion holes in the" already be!ause o& the "ethod %)" going to use &or "ounting "y trunnions will be di&&erent.

the "ethod %)" going to use &or "ounting "y trunnions will be di&&erent. 4ut the pre!ision part o&4ut the pre!ision part o& &abri!ating a re!ei'er is all in the &lats and the bending ig.

&abri!ating a re!ei'er is all in the &lats and the bending ig. %t)s al"ost idiot$proo& (noti%t)s al"ost idiot$proo& (noti!e % said!e % said Bal"ost :$# #.

Bal"ost :$# #.

4e&ore % wrap this up+ % do want to point out a &ew other things.

4e&ore % wrap this up+ % do want to point out a &ew other things. A lot o& builders that ha'e bent theirA lot o& builders that ha'e bent their own &lats ha'e noti!ed str

own &lats ha'e noti!ed stret!hing/distortion around the "ag welet!hing/distortion around the "ag well opening. l opening. 3his is presu"ably3his is presu"ably  be!ause there isn)t really any "etal on the botto" o& the re!ei'er in that area+ and as it bends in the  be!ause there isn)t really any "etal on the botto" o& the re!ei'er in that area+ and as it bends in the

&iture+ it

&iture+ it pulls up on pulls up on the sides. the sides. % did not % did not noti!e any distortnoti!e any distortion o& the ion o& the "ag opening whatsoe'er. "ag opening whatsoe'er. %t%t si"ply wasn)t an issue &or us.

si"ply wasn)t an issue &or us. 3he design o& the &or" (with two bolts through the "ag well whi!h put3he design o& the &or" (with two bolts through the "ag well whi!h put a good bind on the "etal on either side o& the opening# plus !opious a"ounts o& grease in the &iture a good bind on the "etal on either side o& the opening# plus !opious a"ounts o& grease in the &iture ept it &ro" e'er being an

ept it &ro" e'er being an issue.issue. Another !o""on issue is

Another !o""on issue is elongation o& the trigger pin elongation o& the trigger pin ($ais# hole. ($ais# hole. And we did see that on ourAnd we did see that on our re!ei'ers.

re!ei'ers. 4e!ause that hole is so 4e!ause that hole is so !lose to the !orner+ the botto" !lose to the !orner+ the botto" o& the  is on o& the  is on the bend+ and therethe bend+ and there isn)t any "etal abo'e it be!ause o& the hole+ so it doesn)t bend lie the rest o& the re!ei'er.

isn)t any "etal abo'e it be!ause o& the hole+ so it doesn)t bend lie the rest o& the re!ei'er. 3his leads3his leads to the trigger pin hole ha'ing a BdipB at the botto".

to the trigger pin hole ha'ing a BdipB at the botto". ou !an see it in the &irst pi!ture o& Step < o& "you !an see it in the &irst pi!ture o& Step < o& "y tutorial+ abo'e.

tutorial+ abo'e. 3his is easily 3his is easily &ied by woring the "etal gently &ied by woring the "etal gently with a ha""er around the bottwith a ha""er around the botto"o" !orner be&ore tapping it o&&

!orner be&ore tapping it o&& o& the die. o& the die. e !hose not to worry e !hose not to worry about it be!ause it)s an o'erabout it be!ause it)s an o'ersi7ed holesi7ed hole anyway+ so it)s inherently s

anyway+ so it)s inherently stronger than the s"altronger than the s"aller hole on the other side aller hole on the other side already. ready. lus it)ll be heatlus it)ll be heat treated.

treated. And the pin isn)t going to be loose in the hole or anything+ as the distortion is relatiAnd the pin isn)t going to be loose in the hole or anything+ as the distortion is relati'ely'ely "inor there.

"inor there. %t)s really "ost%t)s really "ostly ust a !os"eti! ily ust a !os"eti! issue as &ar as ssue as &ar as % !an tell. % !an tell. %& it bothers %& it bothers you+ round it o'eryou+ round it o'er with a ha""er and wor i

with a ha""er and wor it ba! to the original st ba! to the original shape o& the hole. hape o& the hole. @o biggie.@o biggie. 3ools.

3ools. 3o bend a &3o bend a &lat+ you)ll need slat+ you)ll need so"e basi! tools o"e basi! tools or at least or at least a!!ess to the"a!!ess to the". . -b'iously+ you)ll need-b'iously+ you)ll need a shop press.

a shop press. 3he 20$ton "odel &r3he 20$ton "odel &ro" ;arbor Freight o" ;arbor Freight wored lie a !ha"wored lie a !ha"p. p. A 12$ton should A 12$ton should do itdo it too+ % hear.

too+ % hear. % e'en thin % e'en thin it !ould be done it !ould be done by hand+ with a by hand+ with a de'i!e %)'e designed. de'i!e %)'e designed. %t will %t will be undergoingbe undergoing testing possibly in t

testing possibly in the near &uture+ but "ore on he near &uture+ but "ore on that later. that later. For now+ the sa&e bet is For now+ the sa&e bet is using a press. using a press. %t%t "aes short w

"aes short wor o& it. or o& it. ou)ll also ou)ll also need a good solid need a good solid "ounted 6B ben!h 'ise. "ounted 6B ben!h 'ise. % !ouldn)t see % !ouldn)t see doing itdoing it with a s"aller one.

with a s"aller one. All the ha""ering and !o"prAll the ha""ering and !o"pressing that)s needed &or thiessing that)s needed &or this using the 'ise+ as using the 'ise+ a s"aller one would be !hallenged to get

s"aller one would be !hallenged to get the ob done. the ob done. G'erybody needs a 6B 'ise anyway+ so usG'erybody needs a 6B 'ise anyway+ so ust buyt buy one.

one. ;arbor Freight i;arbor Freight is your &ris your &riend. end. 3hen there is 3hen there is the woring bar+ the woring bar+ i& you !an get i& you !an get one "ade or "one "ade or "aeae one yoursel&.

one yoursel&. %t sa'es %t sa'es a lot o& a lot o& ti"e and trti"e and trouble %;-. ouble %;-. ;a""er$wise+ we ;a""er$wise+ we did pretty "did pretty "u!h e'erythingu!h e'erything with a 5$lb sledge (bending the

with a 5$lb sledge (bending the upper rails and re"o'ing the die &ro" the upper rails and re"o'ing the die &ro" the outside &or"# and a $outside &or"# and a $  pounder &or lighter wor lie no!ing o&& the re!ei'er &ro" the die.

 pounder &or lighter wor lie no!ing o&& the re!ei'er &ro" the die. A plain$ane so!et set &or theA plain$ane so!et set &or the  bolts on the die.

 bolts on the die. A !an o& grease and ,G@3 o& shop rags+ as well as degreaser. A !an o& grease and ,G@3 o& shop rags+ as well as degreaser. 4ut what !a"e in4ut what !a"e in the "ost handy was "is!ellaneous bar sto!.

the "ost handy was "is!ellaneous bar sto!. e used it &or shi""ing the ra" on the press whene used it &or shi""ing the ra" on the press when repositioning to the ends o& the die+

repositioning to the ends o& the die+ we used it &or ha""ering the die we used it &or ha""ering the die out o& the &or"+ we used it &orout o& the &or"+ we used it &or ha""ering the re!ei'er o&& the die+ and we used it &or shi"s in !ases where we had pushed the die ha""ering the re!ei'er o&& the die+ and we used it &or shi"s in !ases where we had pushed the die too &ar into the &or" and need

too &ar into the &or" and needed to push it ba! ed to push it ba! up and botto" it out against the up and botto" it out against the botto" plates o& thebotto" plates o& the &or".

&or". % highly re!o""end ha'ing so"e pie!es % highly re!o""end ha'ing so"e pie!es o& bar sto! layo& bar sto! laying around+ o& 'arious si7es anding around+ o& 'arious si7es and shapes.

(14)

So that should pretty "u!h So that should pretty "u!h !o'er "y eperien!e with !o'er "y eperien!e with  bending &lats and detail how to  bending &lats and detail how to

use this parti!ular bending use this parti!ular bending &iture.

&iture. i'e it i'e it a whirl a whirl andand enoy yoursel&.

References

Related documents

• For 2-Panel Patio Doors, Remove existing Latch Receiver from Receiver Jamb by removing screws from Latch Receiver Faceplate and Security Screw from Latch Receiver Basket.. •

We’ll look at a simple program for simulating random walks, then think about design- ing a class that encapsulates a walk, but be more general than the walk we’ve described. The size

In absence of a LP we have showed that …rms’ decisions to keep or destroy the hard incriminating evidence of their illegal communication hinges upon i) the sensitivity of

To watch a programme, move across to the programme list with the RIGHT arrow button, use the UP/DOWN arrows to highlight the programme and press ENTER. You can sort the list

This work looks at the application of one-dimensional diffusion-edited ¹H NMR spectroscopy (1D DOSY) and ¹H NMR with suppression of the ethanol and water signals to the

We there- fore make use of a unique setting and estimate household preferences in a harmonized way for all countries under analysis by using (a) comparable datasets with common

1) Pin 7 connects to the +6V voltage output of the LVPS. Pin 4 connects to the −6V voltage output of the LVPS. 2) Pin 6 is the output voltage with respect to common. The

The Promoter may, at its absolute discretion, declare any or all entries made by an entrant invalid if the entrant: (i) fails to establish their entitlement to enter the