冲压模具外文文献.doc

Progressive Die Progressive die has the following advantages 1) Class into the module is multi-process dies, in a mold can include punching, bending, forming and drawing a variety of multi-pass process, with a higher than the compound die labor productivity, but also can produce quite complex stampings; 2) Progressive Die Operation Security, because staff do not have to enter the danger zone; 3) Class Progressive Die Design, The process can be distributed. Do not focus on one station , there is no Compound Dies Minimum wall thickness problem. Therefore relatively high mold strength, longer life expectancy. 4) Progressive Die Easy Automation That is easy to Automatic feeding ,Autoout of parts Automatic lamination; 5) Class Progressive die can be High-speed press production, because the workpiece can be directly down the drain and waste; 6) Use Class Progressive die can be Reduce the presses, semi-finished products to reduce transport. Workshop area and storage space can be greatly reduced. Progressive Dies The disadvantage is that complex structure, manufacturing of high precision, long life cycle and high costs. Because of progressive die is a To the workpiece, the shape of successive out, each punch has a positioning error, is more difficult to maintain stability in the workpiece, the relative position of the one-off appearance. However, high precision parts, not all contours of all, the shape relative position requirements are high, you can be washed in the shape of the same station, on the relative position of demanding the same time, out of this part of the profile, thus ensuring precision parts. First, process pieces of carry approach Processes and the determination of nesting is of the progressive die design a very important link. In considering the processes and nesting, we must first consider the process method of carriage parts. Bending parts there are two main ways to carry: 1) Blanking station in the upper and lower pressure, so that after blanking proc