gearhartironwerks Posted January 3, 2011 Share Posted January 3, 2011 Does anyone have the Mark Linn valving schematic using a 5 way valve for the Kinyon air hammer? It used to be posted on the Alabama Forge Council website. Thanks, John Quote Link to comment Share on other sites More sharing options...
Dave Hammer Posted January 3, 2011 Share Posted January 3, 2011 Does anyone have the Mark Linn valving schematic using a 5 way valve for the Kinyon air hammer? It used to be posted on the Alabama Forge Council website. Thanks, John This diagram is the last one I saw online.... There may be some confusion about what the valve is called. You referenced a 5-way valve...the diagram says it's a 4-way valve. There has been some reference (not necessarily in this forum) to a 5 port, 4 way directional control valve when these diagrams are being discussed. I would guess it is the proper name for the valve (I'm no expert on this). The text below accompanied it.... Good Luck.... The problem with the control system in the plans from ABANA, is that as a pneumatic system, it is un-balanced. Our control scheme allows one to balance the system and achieve maximum control, or un-balance the system when heavier blows are required, with less hammer control. With the system balanced, one can lower the hammer head and kiss the dies ever so lightly, or/and have a full heavy blow on the next cycle, or anything in between. We offer this control system for those who wish to try it and I will attempt to explain why and what we are doing. This scheme is working on a hammer, here at present and is a beauty to behold. It actually does control like the European air hammers I have seen in operation. TRY IT YOU MIGHT LIKE IT… This control scheme came from much aggravation, hair pulling, and yes a broken foot. After many days of total exasperation trying to get good control on the hammer, I contacted a pneumatic design engineer here in Birmingham. He offered to come by my office and discuss the problem Jeff and I were having with our control scheme. With his guidance we were able to come up with this design. Problems: The cylinder chambers are not equal. The cylinder rod takes up air volume in the lower cylinder chamber and this alone causes an imbalance in the system. If equal air is applied to the top and bottom cylinder at the center position, the top chamber will have more cubic inches of pressure. To top this off we have the weight of the hammer head also pulling down to create even more imbalance on the system. All of the simple air hammers I have seen had very little control on the down stroke and it is obvious why, given the above analogy. Cure: The simple cure is to control the amount of air allowed in the upper chamber, compared to that in the lower chamber. By placing the regulator in line to the upper chamber we can accomplish this, and there-by provide a method to tune the hammer to give us the response we desire. With this control you can have a number of different settings depending on the type work you are doing, chiseling, tooling, drawing, texturing, etc . Requirements: The main requirement is that your 4-way valve be able to reverse flow. If you study the control diagram you will see that we have basically inverted the control operation. Some valves will not allow you to do this. Check with your valve manufacturer, ours allows this. All else remains the same as the plans you get from ABANA. Set-up: Adjust the pressure using the regulator that provides the air to the upper chamber of your cylinder. You will find that it will be considerably less than the pressure coming to the hammer. This pressure should be set so that the hammer head can be raised up past the limit without falling while the pedal is not depressed. This appears to be the optimum setting. Quote Link to comment Share on other sites More sharing options...
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