【正文】 part of a guide. Its role is to ensure punch the punching clearance when accurate match. Therefore, the guide posts, guide cover the gap should be less than the blanking clearance. Guide Post located next mold base, to ensure that the stroke bottom dead center, the lead column in the template on the face over the top for at least 5 to 10 mm. Guide columns should be arranged far away from the module and the pressure plate in the area, so the operator39。除氮碳共滲和離子氮化、滲硼、滲鈮、滲釩、表面鍍硬鉻和電火花強(qiáng)化外，化學(xué)氣相沉積 (CVD)和物理氣相沉積 (PVD)已逐步采用。模具工作零件的硬度對模具壽命的影響也很大 。因此又增加了沖裁力，進(jìn)而使刃口邊更快磨損，降低模具壽命。 (3)滿足大量生產(chǎn)需要以及減輕勞動強(qiáng)度 .應(yīng)加強(qiáng)冷沖壓生產(chǎn)的機(jī)械化和自動化研究 ,使一般中、小件能在高速壓力機(jī)上采用多工位級進(jìn)模生產(chǎn) ,達(dá)到生產(chǎn)高度自動化 ,進(jìn)一步提高沖壓的生產(chǎn)率。墊板的間距以能出件為準(zhǔn)，不要太大，以免模板斷裂。 壓邊圈可對拉延坯料加壓邊力，從而防止坯料在切向壓力的作用下拱起而形成皺褶。 （ 3）拉深模 是把板料毛坯制成開口空心件，或使空心件進(jìn)一步改變形狀和尺寸的模具。 （ 3）級進(jìn)模（也稱連續(xù)模） 在毛坯的送進(jìn)方向上，具有兩個或更多的工位，在壓力機(jī)的一次行程中，在不同的工位上逐次完成兩道或兩道以上沖壓工序的模具。暴露的卸料板的四周應(yīng)設(shè)有防護(hù)板，防止手指伸入或異物進(jìn)入，外露表面棱角應(yīng)倒鈍。 隨著與國際接軌的腳步不斷加快，市場競爭的日益加劇，人們已經(jīng)越來越認(rèn)識到產(chǎn)品質(zhì)量、成本和新產(chǎn)品的開發(fā)能力的重要性。影響冷沖模壽命的因素很多。 (5)冷沖壓材料選取的影響冷沖壓材料應(yīng)滿足制件的設(shè)計要求和沖壓工藝要求，否則容易損傷模具，降低模具使用壽命。如果將硬度提高到 60～ 64HRC，則刃磨壽命可達(dá) 2～ 3萬次。如經(jīng)精拋光，表面粗糙度值 R =0． 4 m，壽命可提高到 4— 5萬件。 many advanced mold technology not widely so, resulting in a considerable number of large, sophisticated, plex and long Die life with dependence on imports. With the continuous progress of science and technology, modern industrial production of increasingly plex and diverse, product performance and quality is ever increasing, thus the cold stamping technology put forward higher requirements. In order to adapt to the cold stamping technology industry needs, cold stamping technology itself also in innovation and development. cold stamping technology idea is to improve and expand as much as possible the advantages of the cold stamping process, to overe its shortings. in the cold stamping technology development, should note the following aspects: (1) cold stamping technology process parameters should be properly identified and Die with the work of some of the shape and size, to improve the quality of stamping parts and shorten the new product production cycle should be in strengthening the metal forming the basis of theoretical studies, to metal forming theory to practice can produce a direction, and gradually establish a close connection with the actual production of the advanced process of calculation. abroad have begun to use plastic finite element method, automobile parts forming process of the stress and strain analysis and puter simulation to predict the forming part of 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 suitable for mass production, but also for small batch production。 Die Life of cold stamping die and mprovements Overview of stamping die Stamping Die Stamping in the cold, the material (metal or nonmetallic) processing into parts (or half) of a special technical equipment, called cold stamping die (monly known as Die). Press is at room temperature, using the die installed in the press to put pressure on the material to produce a separation or plastic deformation, and thus to obtain the necessary parts of a pressure processing method. Stamping die in the form of many, the general categories according to the following main features: 1. According to the technical nature of (1) Die along the closed or open contour the material are derived from mold. If blanking die, punch die, cut off the mold, cut mode, cutting mode, split mode, etc.. (2) bending mode to blank or blank sheet along a straight line (curved line) to bend, deform, and thus obtain a certain angle and shape of the workpiece in the mold. (3) The drawing die is made of the blank sheet opening hollow, or hollow pieces of further changes to the shape and size of the mold. (4) Die rough or semifinished workpiece is convex according to plan, direct copy the shape of the die shape, the material itself, generate only local plastic deformation of the mold. Such as the bulging mode, reducing the die, expansion die, forming die rolling, flanging mold, plastic mold. 2. According to the degree classification process bination (1) single process model in a press tour, just pleted a die stamping process. (2) posite model is only one station, in a press tour, at the same station at the same time to plete more than two or two die stamping process. (3) Progressive Die (also known as the modulus of continuity) in the feeding direction, rough, with two or more of the station, at the press of a visit, work in different places on the pletion of two or two successive Road over stamping die process. Chong called cold stamping die Di