Coining is a common process in metal stamping industry. It involves thinning the material thickness and transforms the piece part to completely new shape and size. Coining can be done by cold and hot process; it requires higher operational force and may need to be performed two to three times in order to form...
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Pinch trimming operation is commonly used in deep draw progressive tool to separate the drawn product from the progression strip. Unlike a conventional metal cutting process, no shearing or fracturing takes place in pinch trimming. Because the metal basically is pinched off, a very sharp burr usually remains on the drawn part; this burr...
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The first step to set up a progressive tool is to determine the die shut height. Experienced tool makers or set up men know how to set up a tool using the set up block or die Stoppers which is inbuilt in the tool. Shut height is determined by trial and error method...
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The traditional method of die set up usually takes more than 4 hours, it depend on how big the tooling size is and what is the machine type. One way to reduce the set up time is to look into how fast the tool can be setup properly and safely. A quick die change...
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In my last article, I talked about die protection system in high speed stamping environment. Since then, I started to put some attentions to the die protection system that we are using in our tool shop. To my surprise, I found some silly mistakes that it should not be even happened in our tool...
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Die Protection system is used to protect your progressive die in the case of any unexpected event. These events can be misfeed, strip buckle, double hits, slug up, broken punch etc. A mis-feed pilot is used in most of the tool shops for tool protection since the last four decades. Today, many conventional tool...
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In a progressive die, shaving is a secondary process to shear a previously cut edge to produce a smooth and straight edge with minimum breakaway. This metal stamping process usually applies on highly precision dies with precision clearances; the finished quality is comparable to or better than fine blanking. In the shaving operation, the amount of material being...
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