Lawnmowerboy
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theyl peolly leak like a biiach and tear the seals abut pretty quick
ypo can probarbly straighten them
ypo can probarbly straighten them
- Thread starter Baloo
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brightspark
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- yarm stockton on tees
Lawnmowerboy
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not me sir... honestanyone got any hangover cures?
madkayaker
Pro sparkey Pro Welder
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- 13,678
Tin bashing.
ok l was having a few teething troubles getting it to work at first, l had 2 pumps l chose the blue one for the technical reason it was bigger
having mounted it onto the frame and plumbed it in with 4 hydraulic hoses l couldent get the ram to extend which ever position l had the lever in,
so simple test undo the hyd hose of the out let port on the pump if its making pressure we should see some flow, simple......... but stupid, it makes pressure, it oiled the workshop in .25 of a milli second, still the wooden bench wont be going rusty anytime soon,
ok it pumps but not enough was my conclusion as it wont work teh ram, tried a different pump and it was fine, when l got this pump there was 4 open ports and l am not sure l have it connected up right, l might have the ram connected the pressure relief port for all l know, so l just swapped it for the other pump and will come back and mess with this one another time
ok so l swapped to this pump, same thing but just a pretty shade of white instead of blue
and of course the fixing detail was different so l had to cut the brackets off and remake ho hum
this pump has this little soliniod on the side which appears to dump 3/4s of the flow which drops the speed to 1/4 when activated, so a 2 speed bender then, might be useful for creeping the last few degrees so as l dont overshoot ?
having mounted it onto the frame and plumbed it in with 4 hydraulic hoses l couldent get the ram to extend which ever position l had the lever in,
so simple test undo the hyd hose of the out let port on the pump if its making pressure we should see some flow, simple......... but stupid, it makes pressure, it oiled the workshop in .25 of a milli second, still the wooden bench wont be going rusty anytime soon,
ok it pumps but not enough was my conclusion as it wont work teh ram, tried a different pump and it was fine, when l got this pump there was 4 open ports and l am not sure l have it connected up right, l might have the ram connected the pressure relief port for all l know, so l just swapped it for the other pump and will come back and mess with this one another time
ok so l swapped to this pump, same thing but just a pretty shade of white instead of blue
and of course the fixing detail was different so l had to cut the brackets off and remake ho hum
this pump has this little soliniod on the side which appears to dump 3/4s of the flow which drops the speed to 1/4 when activated, so a 2 speed bender then, might be useful for creeping the last few degrees so as l dont overshoot ?
having worked out the dimensions based on the ram l had (not knowing it was bent) l was going to push on and use it anyway, the stroke is 708mm and the chances of finding another nearly the same were slim, wrong again
just happened to chance across these
http://www.ebay.co.uk/itm/300628159642?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
exactly the same stroke and not bent
so thats another £85 gone
but we are still well under what a manual bender would cost to buy
die £305
ram £85
valve £40
hoses £85
pump £40
so thats £555
plus any steel needed which l begged stole or borrowed
just happened to chance across these
http://www.ebay.co.uk/itm/300628159642?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
exactly the same stroke and not bent
so thats another £85 gone
but we are still well under what a manual bender would cost to buy
die £305
ram £85
valve £40
hoses £85
pump £40
so thats £555
plus any steel needed which l begged stole or borrowed
the hydraulic valve was was just a simple single spool valve spring loaded to centre in which position the pressure was returned to the tank
cost £39 and bought from
http://www.ebay.co.uk/itm/310351018693?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
l mounted this valve to a piece of flat plate that l welded to the frame uprights
nice convienent height to work by hand but had already decide it might as well be foot operated as well
simple bit of bar on a pivot with 2 discs welded on for pedals
the pedal was then linked to the lever with a bit of 16mm tube so its hand or foot operated
cost £39 and bought from
http://www.ebay.co.uk/itm/310351018693?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
l mounted this valve to a piece of flat plate that l welded to the frame uprights
nice convienent height to work by hand but had already decide it might as well be foot operated as well
simple bit of bar on a pivot with 2 discs welded on for pedals
the pedal was then linked to the lever with a bit of 16mm tube so its hand or foot operated
Hi Andy,
Great work and you deffo got more toys than I thought lol, shame about the rams being bent, many moons ago I had the works manager plonk a ram on my welding bench It had a dinge in it, saying put a blob on that for me. I said what would happen but he said just doit!
So I did and he went off in a huff cant think why.
Dont forget to pop home for your Christmas Dinner Andy
have a good one
Andy
Great work and you deffo got more toys than I thought lol, shame about the rams being bent, many moons ago I had the works manager plonk a ram on my welding bench It had a dinge in it, saying put a blob on that for me. I said what would happen but he said just doit!
So I did and he went off in a huff cant think why.
Dont forget to pop home for your Christmas Dinner Andy
have a good one
Andy
yah christmas day, bah humbug 
switching rams caused a problem with the fixing pins, the original ram had 35mm holes in the end and this is what l drilled in the frame to hold the ram in,
new ram had 24mm holes for the fixing pins wasent going to weld them up and redrill so l cut some 8mm thick discs with a 24mm centre hole,
good job l have a ronco pocket laser
l welded 1 inside and outside each leg to spread the load out a bit
new pump attached and a couple of shelves added
time for paint then
switching rams caused a problem with the fixing pins, the original ram had 35mm holes in the end and this is what l drilled in the frame to hold the ram in,
new ram had 24mm holes for the fixing pins wasent going to weld them up and redrill so l cut some 8mm thick discs with a 24mm centre hole,
good job l have a ronco pocket laser
l welded 1 inside and outside each leg to spread the load out a bit
new pump attached and a couple of shelves added
time for paint then
hi Stuvy
it fits in snug while its bending but when you back the ram up the tube pops out easy enough, l did bend one test piece round to 220 degrees no problem, but then found l couldent get it off the die, what a donkey
still lots to find out, l can bend a piece of 14g tube round a 5.5" clr die no problem but try it with 16g and it creases up on the inside, yet 16g will go round a 7" clr die no problem at all, wall thickness and radius are fussy
it fits in snug while its bending but when you back the ram up the tube pops out easy enough, l did bend one test piece round to 220 degrees no problem, but then found l couldent get it off the die, what a donkey
still lots to find out, l can bend a piece of 14g tube round a 5.5" clr die no problem but try it with 16g and it creases up on the inside, yet 16g will go round a 7" clr die no problem at all, wall thickness and radius are fussy
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hi
l dont see much hope in a packer doing anything, the tube is a very good fit in the die, the thing that stops the wall kinking is the wall thickness unless you are using a mandrel, the sharper your radius the more the tube wants to kink,
for 1.6mm or 16g tube then 4 x the dia is about as tight as you are going to go with out kinking, 4 x D being 6" which is why my 7" clr works fine but the 5" clr die wants to crumple the inner edge, if l was to use a thicker wall say 2.5mm then it would fall to 3 x Dia or 4.5" clr dia with out any problems, which oddly enough if you looked up the spec for the pro tools dies is probably what they recommend, think l am happy to live with these limitations rather than attempt to build a mandrel bender
Andy
PhillipM
Member
- Messages
- 3,018
Some of the dies on our Baliegh are actually shaped to compress the tube slightly on the edges to compress the tube on the inside - takes more force to do it but it means you can get away with less deformation on thin wall tubes at the expense of more on thick walled stiff.
ah well lifes a compromise isent it, 1.5mm to 3mm is enough of a range for me its not like l am bending for a living is it
should have a go at making a bender like this next
http://www.youtube.com/watch?v=pOZUTOnbGEU&feature=player_embedded#!
should have a go at making a bender like this next
http://www.youtube.com/watch?v=pOZUTOnbGEU&feature=player_embedded#!
