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  #11  
Old 09-10-2019, 03:19 PM
Jaroslav Jaroslav is offline
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I tried the principle. I bent the sheet metal profile 1mm. 20 x 30mm I copied the inner wall of the frame. I used EW to indicate the shape.
I will try to use Pullmax or make wheels for EW. Both seem to be possible for this task. After shaping, the 20mm edge is cut off.

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Last edited by Jaroslav; 09-10-2019 at 03:22 PM.
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  #12  
Old 09-16-2019, 03:04 PM
crystallographic crystallographic is offline
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Quote:
Originally Posted by Jaroslav View Post
I tried the principle. I bent the sheet metal profile 1mm. 20 x 30mm I copied the inner wall of the frame. I used EW to indicate the shape.
I will try to use Pullmax or make wheels for EW. Both seem to be possible for this task. After shaping, the 20mm edge is cut off.

Attachment 53896

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Attachment 53900

This looks good, Jaro.
Two pieces welded may be easier than making one long snaky one.
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  #13  
Old 09-16-2019, 03:26 PM
Jaroslav Jaroslav is offline
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Thank you Kent. I made 2 plastic pulleys for my EW. I'll try to shape the frame and finish the profile with pulleys. For the last bend I'll try to use Pullmax. I had no time.
I moved a beautiful hydraulic press. He needed a little cleaning and a function check. Change oil. For 12 years he stood in the garden under a tarp. Here it freezes in winter. Lis jumped as if I had turned him off yesterday. The perfect machine. Piston stroke is 600mm. Universal machine with very precise adjustable range of ram. It has only 25 tons of pressure, but for those things is enough.
I will send result and my way.

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  #14  
Old 09-17-2019, 01:05 PM
crystallographic crystallographic is offline
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Quote:
Originally Posted by Jaroslav View Post
Thank you Kent. I made 2 plastic pulleys for my EW. I'll try to shape the frame and finish the profile with pulleys. For the last bend I'll try to use Pullmax. I had no time.
I moved a beautiful hydraulic press. He needed a little cleaning and a function check. Change oil. For 12 years he stood in the garden under a tarp. Here it freezes in winter. Lis jumped as if I had turned him off yesterday. The perfect machine. Piston stroke is 600mm. Universal machine with very precise adjustable range of ram. It has only 25 tons of pressure, but for those things is enough.
I will send result and my way.

Attachment 53910

25T is a very useful machine, Jaro.
I have been resisting a 250T four post for a while ....
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  #15  
Old 09-17-2019, 03:45 PM
Jaroslav Jaroslav is offline
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Yes Kent. If you need to test the mold for a part, it will show you the exact shape without risk. Then you can put the tool in the crank press and speed it up. It is applicable for bending and forming on simple tools. You have the possibility to precisely reach the ram and adjust the pressure according to your current needs. Very good machine for toying.
250t is a beautiful pressure, but it already wants to produce for industry. I think we'll go half the throttle and we'll have time to look at the girls and not have to fill out the monthly time sheets. I leave it to fools and youths with a mortgage.
But I intend to produce a bottom press for sheet metal tensioning.
This will be another task.
I tried to advance to the frame today, but I didn't have a camera. So next time I'll send the results.
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  #16  
Old 09-19-2019, 02:56 PM
Jaroslav Jaroslav is offline
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Default Continuation of research.

Continuation of research.
I finished the tool. I used a lathe. The angle difference between the tools is 2 degrees. The smaller half of the tool is sharper minus 2 degrees. Both tools also have a semicircular conical surface. I did not have to grind the tool. I have made exactly to the required size. Note the way of clamping to the lathe.

I tried to bend the angle and shape the profile. Another idea was to make the frame whole without welding.
Using a bead roller, I made an edge and bent the sheet in the required arc. The second step is shaping the profile.
The sheet must be trimmed because it curls in sharp bends. It is necessary to shrink using jaws. It is possible to modify the shape afterwards before last forming.
I think the last attempt will be the best.

Now I have to make a template and paint the frame profile on sheet metal.

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Last edited by Jaroslav; 09-19-2019 at 03:03 PM.
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  #17  
Old 09-19-2019, 03:05 PM
dwmh dwmh is offline
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That is very clever use of a lathe Jaroslav. I would never have thought of doing that. The end result looks good. Well done.
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  #18  
Old 09-19-2019, 03:49 PM
Jaroslav Jaroslav is offline
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Thank you David. I only made this tool with this method. Square and square for 19x19 tool from 20x40mm profile. It's accurate and simple. Fear is not appropriate. You can sharpen any tool from the rest for machining.
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Last edited by Jaroslav; 09-19-2019 at 11:44 PM.
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  #19  
Old 09-20-2019, 02:15 AM
galooph galooph is offline
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Like David said, very clever use of the lathe. That's turned out really well thanks for sharing, Jaroslav!
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  #20  
Old 09-20-2019, 09:59 AM
billfunk29 billfunk29 is offline
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Well done Jaro. You kept after it til you got it. Ditto on the cleaver use of the lathe. As a safety precaution, you may want to cross drill the shank for a temporary pin or bolt to keep the part from slipping out of the jaws. Thanks for posting.
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