JD Squared 3 - Page 12

31”
62”
Figure 23 - 3rd bend position
Figure 24 - 4th bend position
BEND 3:
At this step you may want to use
alarge90
o
square to help position the
template. Position the template above
the rollbar tube with the template line
facing up towards the top of the rollbar
asshowningure23.Slidethetemplate
up or down the rollbar tube until its
outside is 31” from the rollbar’s center.
Mark your tube and make the bend.
BEND 4:
Position the template with the
template line facing up towards the
top of therollbar asshown ingure
24. Slide the template up or down the
rollbartubeuntilitsoutsideis62”from
theoutsideofthe3rdbend.Also,verify
the bend is the same distance down
the tube from the top of the rollbar. If
all is correct mark the tube and make
the bend.
Lastly, cut the ends of the tube
tomaketherollbar40”talland your
done.
Finished!
PROCEDURE FOR SETTING UP A PRODUCTION BENDER USING THE TEMPLATE METHOD
AsIstatedearlier,thismethodcanbeusedforproductionbending.Theideaofmakingthebends
from the center out doesn’t usually work well in production. Most production bending is done by feeding
thetubethroughthebenderandmakingeachbendasneeded,therebyeliminatingtheneedtoremove
thetubefromthebenderandipitaround.Forthisyouwouldwantasetupsheetwiththelocationsof
where to place the marks on the tubing for each bend location. The problem with template bending is that
the template has the tube stretch and springback already in it. Since the tubing will grow in length as you
makebendsinit,howcanyoumeasureitaccuratelyonceit’sbent?Unfortunately,youcan’t.Whatyou
mustdoisplacemarksdownthetube,forexample10”apart,startingattheoneendbeforeyoustart
bending.Nowwheneveryoutransferthemarkfromthetemplatetothetubebeingbentyoucaneasily
measurethedistancefromoneofthe10”markstodeterminewherethemarkwouldofbeenplacedon
an unbent piece of tube.
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