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Press and Die (Squareness)
Posted on March 17th, 2009 2 commentsBy design a Metal Stamping Press is designed to provide (3) important functions.
1st A completely square environment for the tool to function in. (See Theory of the Box)
2nd The rated tonnage of the machine.
3rd Finally, a repeatable die space with the proper rated tonnage and a perfectly square environment.
There are very simple methods of maintaining the square condition of the machine. As long as there is no distortion we can inspect and adjust the level of the press bed. Once the press bed is level, place the slide at the bottom dead center position, check and adjust the level of the slide left to right and front to back. Always check the parallelism on the centerline of the press left to right and front to rear as well as the four corners of the slide. The die seats on the center lines of the press, thus you can have one corner of the slide that may be out of square with the bed, but if the tool is inboard of the damaged area you can operate in a somewhat trouble free condition. Remember that the most important condition is squareness!
Jeff Fedline
2 responses to “Press and Die (Squareness)”
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krishnan May 10th, 2009 at 15:49
Dear Jeff Fedline,
What way the forging press squareness will effect open tool forging with pillar sets?
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jfredline May 11th, 2009 at 20:52
The die space of any press must be square if you are going to optimize your productive output. If the upper and lower tool surfaces are not parallel with each other, part of the forming pressure will be lost in side thrust and you may not be able to produce a good part. From the standpoint of the effect on the equipment itself, anytime you have an off center loading condition which would be created by an out of square condition in the die space you will cause premature machine failure at some point.
Jeff Fredline
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