KemppiFrog
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- Location
- Aquitaine
This has been something that has been tickling my 'want' list for a while, first as a hydraulic powered one, then, when I got started, evolved into air power.
The ram is the cylinder and piston from a Briggs & Stratton garden tractor engine, sandwiched between two 12mm ally plates. Main frames is RSJ. This being poor in torsion, will be completely plated over. The current state is partial and the angles are due to the bits lying around as whole contraption is made from stuff loose in the w/shop.
The lever gives 14:1 with a couple of tension springs to return the ram. Tooling is tempory until I get some stuff from UK. But did some neat 10mm holes in 1mm mild sheet at first try.
Air valve is a 1/2" ball with, to the left, a modded outside brass tap to dump the waste air and act as a pressure relief. The ally lever is controlled by a spring on the other side of the stand and both will be linked to a foot pedal. Co2 bottle will be 'T'ed in to act as a reservoir. Possibly with a small spare compressor to make it self contained.
Expected use it mostly 5 & 6 mm in 1>2mm, so plenty of spare capacity.
Ram gives 400kg at 6 bar, ratio makes that 5.6 tonne at the punch. Expecting to cycle at 1/second.
The ram is the cylinder and piston from a Briggs & Stratton garden tractor engine, sandwiched between two 12mm ally plates. Main frames is RSJ. This being poor in torsion, will be completely plated over. The current state is partial and the angles are due to the bits lying around as whole contraption is made from stuff loose in the w/shop.
The lever gives 14:1 with a couple of tension springs to return the ram. Tooling is tempory until I get some stuff from UK. But did some neat 10mm holes in 1mm mild sheet at first try.
Air valve is a 1/2" ball with, to the left, a modded outside brass tap to dump the waste air and act as a pressure relief. The ally lever is controlled by a spring on the other side of the stand and both will be linked to a foot pedal. Co2 bottle will be 'T'ed in to act as a reservoir. Possibly with a small spare compressor to make it self contained.
Expected use it mostly 5 & 6 mm in 1>2mm, so plenty of spare capacity.
Ram gives 400kg at 6 bar, ratio makes that 5.6 tonne at the punch. Expecting to cycle at 1/second.
. And as a sort of nibbler for decorative work. Hence the 550mm throat to get half way across a sheet.
