Any tool maker might imagine what will happen if a tap within a progressive tool drives into a strip without a pre-pierced hole or a missing extrusion hole. The consequences can be very frustrating. The missing hole in the in die tapping tool ( IDT) can be due to some of the following reasons:-...
Read more »
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...
Read more »
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...
Read more »
Ever thought of using disc spring washers as compression springs in tool and die making? A disc spring is best use in situations whereby the tooling requires higher spring force but constrain by space limitation or when incorporating a nitrogen gas spring is not possible. A disc spring is a conical shell. It can...
Read more »
Drawn ring produced in a simple progressive tool. Found this video from You tube when I was searching some other information related to stamping technology. Although this video was taken a few years back, but is showed viewers a clear picture of how a simple drawn tool been design and runs in a progressive...
Read more »
Some readers wrote to me after reading my previous post on “Metal forming spring back”. The technique I mentioned in the post was used on a progressive tool it is not suitable in the single forming tool. Some of the factors for successful bending are the size of interior bend radius and the metal...
Read more »
In die tapping allows threading to be done in a progressive tool without involving expensive secondary threading operations. In die tapping units are available in both mechanical and servomotor driven. Mechanical driven tapping unit hreading is done by a series of gears arranged in different ratios, which are driven by a vertical lead screw...
Read more »
Any mistake made during the tool set up process can cause the mechanical press to be overloaded and stuck to the bottom of the press stroke. The mechanical press gets stuck on the bottom of the stroke when the press’s energy cannot sustain the required punching force as the press’s energy has depleted and...
Read more »
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...
Read more »
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...
Read more »