【正文】
of stamping. Figure 10. Head big radius is very effective, but it is expensive. It is out of the hole and the interval has restrictions. 第 8 頁 共 9 頁 Figure 11. A Ironworker style punch is a very old design, the design to avoid the head of stress concentration areas. Mechanical blunt bending machine latenieenth century middle part stamping, usually has a strong on the back of the C frame. Early mechanical drive machine double or triple is usually reduction gear, therefore can play a tremendous strength. This design have been widely used in various inventions plate manufacturing rivet and bending stamping, such as in the work. In the development of the familiar, metal work before the bulldozer bending machine widely used blunt. The origin of this one design goes back to the nieenth century used in the manufacture of boiler shell and other fabricated metal products of stamping head type. This kind of design in this kind of work can produce simple tools under the evolution happened. Blacksmith, This type of punch advantage is to reduce the stress concentration of the head, should as far as possible in the head. This kind of design to production, is not only a kind of saving and also won39。t work in heavy load. But there is a flaw in the design, manufacture, stress the need to use the punch fixed board may not easily obtained. Many modern good Ironworker stamping equipment is used in large Angle, instead of fillet. These prove to avoid problems in stamping head breaking hard metal machining process has been solved. 第 9 頁 共 9 頁 Figure 12. Placed under the head of a pressing elastic gasket as a means to reduce the vibration. This method has been tried many times but little success. The elastomer material is often damaged and punch was out of the hat. Elastic gasket The rubber gasket to put the head around or stamping below as a means to reduce the impact of means little success. This method has been tried many times but little success. The elastomer material is often damaged and punch was out of the hat.