JamesBBrauer Posted July 15, 2009 Share Posted July 15, 2009 (edited) parts so farScored a 5" cylinder with a a 6" stroke and 1" shaft on ebay for $10 (usd), plus shipping. It has two 1/2" ports. Mac 4-way valve with 24v solenoid. Has cyl A and B outputs, input, and exhaust. All 1/2" ports. Ordered some surplus 1" linear bearings to run on some 1" shafting I already have. Got a bunch of 1/2" fittings in copper and brass (biggest expense so far).the planPlumb 1/2" copper straight off the tank of my 2-stage 80 gal air compressor. It makes about 160 psi. I know black pipe would be better, but I'm trying to keep the cost down. Keep the air friction for the 20' run between the supply and valve to a minimum with wide bends. Shock mount the valve to the cylinder with rubber or maybe springs. Put a 'T' with a screw cap between the valve and cylinder for squirting in oil. Mount the cylinder and shafts together so the output of the cylinder is driving a hammer that rides on the linear rails. Weld a 2" nut inside a sleeve on top of the hammer. Attach a mating threaded rod (I already have) to the shaft of the cylinder so I can raise and lower the hammer by six or so inches.what I haven't figured out yetHow much weight will my cylinder move with my air supply? The plan is to fixture this temporarily to the bench and experiment. Will this be a single shot or can I get some hammering action? I'll start with a manual switch on the solenoid for single shots. If I can flick the switch back and forth and get some sustained hammer action, I'll build a little timer circuit that can control the stroke height and duration. What will the hammer and anvil be made from? I can get some 4" round stock locally. Depending on how much weight this can push around I would like a 10" length for a hammer and about 36" for the anvil. I'll dovetail both to take small dies. Edited July 15, 2009 by JamesBBrauer add link to sketch Quote Link to comment Share on other sites More sharing options...
Dodge Posted July 16, 2009 Share Posted July 16, 2009 Have you looked into any information on Kinyon style air hammers?? Quote Link to comment Share on other sites More sharing options...
JamesBBrauer Posted July 16, 2009 Author Share Posted July 16, 2009 I saw Kinyon mentioned when I was looking for pictures, but searching on that specific term pulls up lots more examples than I had seen previously. Thanks for the tip. Quote Link to comment Share on other sites More sharing options...
medieval Posted July 27, 2009 Share Posted July 27, 2009 With a 5" cylinder you are going to have a verrrrrrry slow hammer. Too much volume in the cylinder to get any speed. Kinion air circuit runs 1 1/2"-2" cylinders. The difference in cylinder volume requires 6 to 11 times as much air:o to run your setup. Quote Link to comment Share on other sites More sharing options...
medieval Posted July 27, 2009 Share Posted July 27, 2009 With a 5" cylinder you are going to have a verrrrrrry slow hammer. Too much volume in the cylinder to get any speed. Kinyon air circuit runs 1 1/2"-2" cylinders. The difference in cylinder volume requires 6 to 11 times as much air:o to run your setup. Quote Link to comment Share on other sites More sharing options...
JamesBBrauer Posted August 17, 2009 Author Share Posted August 17, 2009 I got a really good deal on the cylinder so I'm sorta locked into using it. But I'll be sure to leave room in the design to replace it with something smaller. I'm hoping that by using electronic controls I can dial in the stroke length and frequency into something reasonable. Quote Link to comment Share on other sites More sharing options...
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