弯曲模具设计毕业设计说明书

弯曲模具设计毕业设计说明书内容摘要：

17] 许发樾 模具标准应用手册 北京机械工业出版社 1994 [18] 化学工业出版社 2020 [19] 卢显峰冲压工艺模具学 北京机械工业出版社 2020 [20] 《冲压工艺及冲模设计》编写委员会编著 冲压工艺及冲模设计 北京国防工业出版社 1993 [21] 徐秉业等弹塑性力学及其应用 [M]北京机械工业出版社 1984The study of Influence factors on dies life Because the ramming processing has the productivity to be high the material use factor is high the pressing part precision high the plex degree is high and interchangeability good and so on characteristics therefore in the industrial production applies especially in the production in enormous quantities very widely But the ramming mold in the cold stamping processing is also essential The ramming mold general structure is plex the accuracy requirement is high the production cost is also high In the ramming process the ramming mold as a result of longterm reasons and so on attrition distortion break has the expiration thus causes the enterprise production cost to stay at a high level Therefore the exploration enhances the ramming molds service life efficient path to have the important meaning regarding the enterprise development 1 The influence ramming die lifes primary factor to enhance the ramming die life must to the mold which expires carry on the analysis understands and grasps the expiration reason and the influence die life primary factor Through the research discovery affects the ramming die life the primary factor to have the following several aspects 11 Mold material 1 mold material smelting if the quality of die steel contains more objects or too much carbon steel will seriously reduce the impact toughness of steel antifatigue and fracture resistance causing an early fracture die blocks and cracking etc collapse 2 mold material in the heat die machining process must be carried out in the quenching and tempering heat treatment and so on The level of heating temperature the length the size of the cooling rate the protection measures such as the choice of process parameters will affect the die life 3 the performance of the workpiece material hardness of various materials strength wear resistance corrosion resistance plastic deformation resistance fracture resistance fatigue resistance and other properties of hot and cold are different different properties of the process of stamping the workpiece material the impact of the press are different such as the stamping of the workpiece material hardness will speed up and increase the wear and tear mold stamping parts hardware and sticky material such as stainless steel when heating large easystick mold cleanup will not be timely speed up the die wear and reduce the service life of molds Therefore mold material must be based on the selection of the workpiece material 12 Die structure 1 die form of die structure of the structure is based on the shape of stamping parts to the design of the same stamping mold can form a very wide range of choices if the mold structure is irrational and the stress concentration may lead to fracture failure 2 stamping parts stamping parts of the shape of the shape of more plex structures will be more plex molds stamping dies when the local increase wear and tear or deformation damage will reduce the life of mold 3 parameters Die Blanking Dies parameter space punching power discharge and up boundary value etc which blanking die gap of life most affected such as a reasonable space long life molds gap is too large or too small will reduce die life 4 Die Dieoriented agencies agencies or nonoriented lowprecisionoriented rigid poor will aggravate the die wear and reduce die life 13 If the press situation in lowprecision pressoriented poor stiffness high incidence of eating moldmode and speed up the wear and tear on the life of a great impact on mold 14 Use and maintenance of molds including mold installation transportation preservation and maintenance of lubricants such as the use and operation 2 Improve the stamping die life in an effective way of stamping the die service life of highmode edge can reduce the number of repair and installation time debugging tool to increase the effective working hours and raise labor productivity reduce cost of production stampings Life of stamping dies for the impact of the main factors there are the following types of stamping dies to enhance an effective way of life 21 Selection of a suitable wearresistant materials in general in the stamping production stamping parts according to material and technical requirements production batch size the premise of ensuring the economy as far as choice of materials with high wear resistance and the necessary heat treatment process Mold materials monly used are 1 Cr12 steel types including Cr12Mo Cr12MoV cold stamping die for a wider range of alloy tool steel has a high hardenability hardened and wearresistant ability 2 Cr4W2MoV steel that is 120Cr4W2MoV this material with Cr12 steel types pared to small eutectic carbide and a more even distribution have a high hardenability hardening and also has higher mechanical properties and wear resistance W Mo V elements help to improve the stability of steel for the use of chemical treatment to improve die life conditions provide a favorable environment 3 W6Mo5Cr4V2Al steel high hardness can be hardened to HRC 66 68 wear resistance and alloy steel than the average life expectancy of the mold can increase more than 4 times Red system for wear and tear on the mold particularly materials such as nickel chromium titanium fiberboard and other materials laminated glass 4 carbide high hardness can reach more than HRC85 Excellent wear resistance hard alloy die life tool ste。