Any benders on here?

Discussion in 'Engineers' Talk' started by dvddvd, May 27, 2021.

  1. dvddvd

    dvddvd Well-Known Member

    Anybody use or used a ring bender, looking to buy one

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    thanks
     
  2. Astramax

    Astramax Super Member

    One or two.
     
  3. The Happy Builder

    The Happy Builder Screwfix Select

    What are you actually planning to bend?

    I assume it’s pipe as they are semicircular formers.
     
  4. DIYDave.

    DIYDave. Screwfix Select

    The Resident Troll/s is gonna have a field day (evening) with this one when he/she/moron/ clocks on later - around 8ish usually isn’t it ? :eek:
     
    FlyByNight, Kingscurate and dray like this.
  5. Astramax

    Astramax Super Member

    Is Tool Mart still published?
     
  6. dvddvd

    dvddvd Well-Known Member

  7. dvddvd

    dvddvd Well-Known Member

    Something like this...they are roughly £3000. I want to bend angle iron into circles with a toe in...approx 600mm diameter. To make sign frames
     
  8. ejenner

    ejenner Member

    Are you going to be making such a volume that it would be worth spending that much money? Can't help thinking there would be a much cheaper way of making frames. What about a press? Or pouring aluminium casting (already waterpoof without further treatment.
     
  9. dvddvd

    dvddvd Well-Known Member

    Not sure how else you can bend angle into circles? I've seen the smaller manual ones, the one above is motorised. The manual ones seem to take a lot of effort, you can actually buy the above one without the motor. But it's a good 30 mins of winding the massive handle round and round.
    I get charged around 20 quid each for a shop to bend each one then there is the 20 day wait and not bern able to experiment on different shapes and ideas.
    So after 150 frames it would pay for itself?
    Just wondered how good they are?
    All the videos I've watched show them bending meral but not too a full circle.
    It says it can do it but the first and last 200mm it can not bend so you have to overlap it and then cut the 2 non straighten piece off each end
     
  10. ejenner

    ejenner Member

    And what about sand casting aluminium? That only costs a few quid to set up for. You have to spend time preparing the mould for the hot aluminium to flow through but once done you can have any shape you want, no joining to do and the rough cast finish is smooth and waterproof without any further treatment. It can be very easily polished if you wanted to do something special. Obviously steel rusts so must be coated if the sign is outside.
     
  11. stevie22

    stevie22 Screwfix Select

    The machine you show is set for tube which is quite easy to bend without problem (even plumbers can do it). Angle will require special guides to support the flanges and I suspect flange in would trickier than flange out.

    If you want so many done that you can contemplate this sort of expense then I would have thought you could get a better price from a specialist. Try Barnshaws they have been around a long time and can roll most sections
     
  12. dvddvd

    dvddvd Well-Known Member

    Thanks, you get supplied a set of segmented tooling to start with. Which allows you to bend different width of square/ rectangle sections if you want to bend pipe/ rounds you need to buy tooling for the OD of each section you need to bend.
    Been told it will bend angle but if doing lots of one size you can buy custom tooling which is not cheap at £500 a set
     
  13. dvddvd

    dvddvd Well-Known Member

    Hi dont know anything about casting Aluminium but will have a look into it
     
  14. Bob Rathbone

    Bob Rathbone Screwfix Select

    'Benders'? this is not 'Futurama'.
     
    nigel willson likes this.
  15. ejenner

    ejenner Member

    Casting aluminium is very easy. You require a crucible, which is basically a ceramic pot. Then heat it up with a gas flame underneath until the blocks of aluminium turn liquid. The impurities will float to the surface (the ****) and you can skim that off the top of the molten metal. Lift the crucible with a special tool which allows you to handle the pot of molten aluminium from a safe distance and pour the aluminium into a mould which is made of sand. Let it cool for 30 minutes and then knock the sand out of the mould and you have your finished item. As I said, you can treat it further by polishing it but it is usable straight out of the cast. It's also really easy to machine, if you want to drill mounting holes or whatever. Aluminium is commonly used in sign making because it's light and waterproof. The majority of signs are made from a flat piece of aluminium sheet 3 or 4mm thick with an aluminium bar on the back for mounting. But it sounds like you're doing something specialist, not just street furniture.
     
  16. dvddvd

    dvddvd Well-Known Member

    Seems casting is great for irregular shapes but for simple angle shaped profiles it seems a long winded way if you want to produce say 10 at a time ?
     
  17. ejenner

    ejenner Member

    If you had a big enough floor space to lay out all ten moulds you could do 10 in a single pour. Much faster than bending.

    Look at it like this. Many automotive engine manufacturers make exhaust manifolds from cast steel. When an exhaust manifold can be cast steel or bent and welded tubular steel why do manufacturers go for casting? Because it's fast, saves on materials and produces identical parts in high volume.
     
  18. Bob Rathbone

    Bob Rathbone Screwfix Select

    Does the frame have to be metal. could GRP be used, the mold is far simpler. Even better, a vac forming using PVC sheet.
     
  19. ejenner

    ejenner Member

    It seems a very strange approach, but clearly he's after a particular finish for some special reason. I would always look to manufacturing if wanting to produce in quantity. What do they do and why do they do it that way... usually makes sense to copy their methods.
     

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