冷冲模具毕业设计外文翻译-----冷冲模具使用寿命的影响及对策-模具设计(编辑修改稿)

冷冲模具毕业设计外文翻译-----冷冲模具使用寿命的影响及对策-模具设计(编辑修改稿)内容摘要：

f a process plan on the possibilities and potential problems. (2) to accelerate product replacement, mold design to overe the shortings of a long cycle. Should vigorously carry out puteraided design and manufacture of molds (CAD / CAM) Research. In my country, paying particular attention to strengthening the multiposition progressive die CAD / CAM Technology. (3) to meet the needs of mass production, and reduce labor intensity. Should strengthen cold stamping of mechanized and automated, so that the average, small pieces of highspeed presses in a multiposition progressive die production, production reached a high degree of automation to further improve stamping productivity. (4) expand the scope of application of cold stamping production. So cold pressing both s uitable for mass production, but also for small batch production。 both the general accuracy of product production, but also can produce precision parts. Should pay attention to development such as fine blanking (especially thick material fine blanking), forming highenergy, soft mold forming, pressure and processing new superplastic forming process, but also promote the easy mode (soft mode and the low melting point alloy mold), Universal Hybrid model, the use of CNC punch press and other equipment. In addition, the performance improvement of sheet metal stamping, mold new material, die development of new processing methods should be further strengthened. Die with life and Countermeasures Die with the life of the workpiece by punching out the number of terms. Many factors affect the life Die. There are die structure design, manufacture molds used in the punch and die materials, die quality and surface hardening heat treatment, precision die manufacturing parts and cold stamping materials selection. In addition, there are die installation, adjustment, use and maintenance. 1. Die Design on Life (1) Layout design of layout methods and take the boundary value a great impact on the die life, too small to take the boundary value, often causing rapid wear and convex mold, die bite wounds on the. Starting from material savings, take the boundary value smaller the better, but take the edge is less than some value, the cut surface of the mold and the quality of life adversely. There will be left behind in the blanking die Qgap were to produce spare parts glitch, or even damage the die edge, reduce die life. Therefore, consider increasing the material utilization of the same time, parts must yield, quality and life expectancy to determine the layout methods and take the boundary. (2) die structure prone to stress concentration on the cracking of the die structure, posite structure can be used or mosaic structure, and prestressed structure to enhance the mold life. (3) the impact of clearance when the gap is too small, pressed extrusion of interest, increased friction, increased wear, the wear side of aggravated discharge and push pieces after blanking time, materials and convex, the friction between die will cause wear and tear than the end edge on the side of the grinding much, but also easily lead to convex, concave mold temperature is high, the adsorption of metal debris in the side edge to form a metal tumor, so that male and female die chipping or expansion occurs crack phenomenon. Therefore, the gap is too small to Die Life very bad. Gap is too large will increase the punch and the die face the edge of the concentration of stress, resulting in a sharp increase in stress, so blade edge quickly lose angular yield deformation. Therefore, addition of blanking force, thereby enabling faster edge edge wear, reduce die life. But in order to reduce the male and female die wear, extending mold life, while ensuring quality of stamping pieces under the premise that larger space designed properly it is necessary. (4) Dieoriented structure of the life of a reliable guide for the working parts reduce wear, prevent male and female die bite wound is very effective. In particular, nonsmallQ gap Q gap or Die, pound die and multiposition progressive die even more important. To improve the die life, must be based on processes and the demand of precision, the correct choiceoriented form and orientation accuracy, the choice should be higher than the accuracyoriented convex, concave mold with precision. (5) the impact of cold stamping materials, cold stamping materials selected should meet the design requirements of workpieces and stamping process requirements, or easy to mold damage and reduce mold life. Poor surface quality of cold stamping, punching, cracking when the workpiece is also easy to scratch mold. Bad cold stamping plastic materials, deformation is small, easy to press when the workpiece rupture, but also easy to scratch mold. In addition, the material thickness tolerances shall ply with national standards. Die because of a certain thickness of material suitable for forming, bending, flanging, drawing die of the male and female die structure gap is directly determined by the thickness of the material. Therefore, uneven thickness, will result in waste generation and mold damage. 2. Die Die Life of Die Die Life of a mold material properties, chemical position, structure, hardness and prehensive reflection of metallurgical quality. Among them, the material properties a。