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  • lathe / Slip Roller (pix)

    necessity the mother of invention?

    needed to roll some thin stock into tubes and cones and threw together a 'lathe accessory' .. probably not the best thing for my lathe, but on thin stuff, it went easy as pie.





    crossslide adjusts the amount of bend.. swinging the compound a few degrees makes cones.

    -tony

  • #2
    Clever idea,I like it.

    Allan

    Comment


    • #3
      Man, that's clever.
      Techno-Anarchist

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      • #4
        Excellent!
        To invent, you need a good imagination - and a pile of junk. Thomas A. Edison

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        • #5
          thanks.
          of course, soon as i made it, i needed
          something beefier. had to rolle 2 mm sheet
          and the rolls were deflecting / pivoting on
          my toolpost nut.

          so i hammerformed the cone first, real rough, and welded the seam. heated the whole cone to deep red and quicly gave it a run through on the 'slip roller'... evened it right out.

          -tony

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          • #6
            Great idea! If it can handle knurling it should be able to handle this. Just make sure to check the speed before sending something through!

            [This message has been edited by Dave Opincarne (edited 10-17-2004).]

            Comment


            • #7
              Hey, what about a pair of roller bearings at each end riding on the drive shaft. Adjusting the gap between each pair would allow you to make both conic and radial adjustments and might reduce some of the strain on the cross slide.

              Adendum: Adding a bearing to the backside of the rollers could help to relieve deflection as well.

              Dave

              [This message has been edited by Dave Opincarne (edited 10-17-2004).]

              Comment


              • #8
                Hey Tony I like that.
                That's a neat idea. I have been looking for something that can roll 1-1/2" x 1/4" into rings for bearing sleeves.
                Using this idea and the big lathe down to 31 revs I could have a mandrel for each size.
                If I made the mandrels out of alloy and used two ball races for the adjusting rollers I could roll it round, take it out the lathe, clamp it and weld the two ends up.
                Then put it back in the lathe to skim the outside up, all on the one former.
                Being in alloy would stop the weld sticking.

                I'm going to the East Midlands Model Engineering show tomorrow to look at a ring roller but I don't think it will do a continuous roll and I will still have to make mandrels to skim up afterwards with the added disadvantage of matching the rolled ring to the mandrel.

                At least this way it's all done off one mandrel.

                Woweee I've done real good off this list this week.
                A sacrificial washer for shaft repairs and now a ring roller.
                Just goes to prove you never stop learning.

                Thanks guys.

                John S.
                .

                Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.



                Comment


                • #9
                  careful, though, as you're limited to the lathe swing on rolling diameter. maybe if you take the gap out, and your ring isn't too wide.

                  it would be best if the follower roller (the one opposite from the side you are feeding -- ie, the bottom of the three in this case) were also driven. usually these are driven by the drive roller (which, in turn, is driven by hand or motor).

                  if the parts are light enough, a simple 'rubber band' might do. by rubber band i mean small flat belt. you would have to 'tension' it when the rollers are dropped into the toolpost.

                  make them as short as possible for the job at hand, as it will minimize the bending.

                  Comment


                  • #10
                    I like this !!
                    e
                    please visit my webpage:
                    http://motorworks88.webs.com/

                    Comment


                    • #11
                      Tony,
                      I was thinking of using the TOS, it's 22" swing and the biggest ring will be about 6"

                      I think driving the lower roller may be hard without a lot of thought. I was thinking about using a couple of scrap ball races side by side as the maximum width I need is 2" in 6mm or 1/4" section.

                      It looks to be that simple to built a single side short version that it will pay me to just try it and see what the results are.

                      I won't have a lot of time tomorrow as I'm going to the East Mids show and I'm quite busy at the moment. I'll have to see what I can cobble up.

                      Thanks again for the idea.

                      John S.
                      .

                      Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.



                      Comment


                      • #12
                        john,
                        be sure to post a picture or two when finished.

                        food for thought: all of the big pro rolling machines use a rubber roller (urethane coated) with steel mandrel form roll.

                        if i'm not mistaken they might only have two rolls, urethane and steel, not 3 like the lighter versions.

                        press a rubber sleeve onto a bearing, load it in the toolpost like a single-wheeled knurling tool, press that against undersized mandrel (in chuck) ... load the cross slide until you reach finished size.

                        laser printers tend to have nice rubbercoated rollers.

                        -tony

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                        • #13
                          Well done Tony, and thank you for shareing the idea with us.

                          I have one thought though, and I know some will say here we go again. But please be carefull with powered rolls like this. They might be going slow, but there is a deceptive amount of potential in there.

                          I guess I'm a little jumpy as I have seen first hand a fellow worker put his hand through some power pipe rolls, and it wasn't a good job cleaning up and having to removing the fingers he left behind stuck to the rolls. They made quite a dong when they hit the bottom of the rubbish bin. He was rolling full lenghts of pipe and could easily have stayed 3 feet away from the rolls, but for some reason and a moments inattention it happend.

                          Comment


                          • #14
                            Really cool! Just looking at it,if you are having trouble with the thicker material deflecting the rollers,why couldn't you back up the rollers in the middle with a set of roller bearings and use a heavier shaft between centers? Just a thought.
                            I just need one more tool,just one!

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                            • #15
                              That is really a neat idea.

                              Joe

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