【正文】 non can assembly tighten. Coating in use process will die fall off naturally, need not removed. This uniform coating, can improve the uniformity of assembling clearance. (5) Technology DiaoZhengFa measures The main technological measures to adjust the gap between two kinds of the mould method: 1. Size method Processing of the punch, will the punch frontend appropriate lengthen, extended period of section size and sunken model hole processing to the same size. Assembly, make the punch into female model hole, natural form the cutting clearance, and then to the punch with fixed together with the punch mould seat on board with the pin for fixed and will last longer period of the punch front can remove form even clearance. 2. Positioning hole method Process positioning hole method and the inside of the progressive die principle about. Processing, the punch in fixed board and concave die on the same position processing two positioning hole, can will locate hole and the mold cavity a cut out. Assembly, in the positioning hole insert pins to ensure that gap. (6) Standard model method According to the drawing wedm in advance in processing a standard model or the qualified stamping parts, to adjust the assembly put it in between convex, concave die, upper and lower die relative motion can be reasonable degree when appropriate. (7) Measurement method Measuring method of the measuring tool have feeler. A feeler method after the adjustment convex, concave die clearance good uniformity, it is the monly used method. Assembly, the punch in the concave die in the hole, convex, concave die according to the size of the clearance choose different specifications of the feeler insert convex, concave die clearance, inspection concave die around the blade gap everywhere, and according to the measured results adjustment. If the adjustment of the punch fixed board knock until adjust good so far. (8) Adjustment method of repair match means Die in use after period of time, because the convex, concave die normal wear and tear. To working parts inspection, if products produce burr, convex, concave die dull 10 and collapse the blade factors, it is because of the convex, concave die clearance for wear changed, namely bigger or not even. To make the convex, concave die restored to the original gap value out of parts can use the following method to qualified for repair match means. 1. Convex, concave die clearance greaten repair match means method General dies in use after period of time, because normal wear will make convex, concave die gap increase gradually, thus to make the work and so on a series of problems produced burr. This kind of circumstance, can use first thickness is equal to one of the KuaiGui insert gap between the convex, concave die, if convex, concave die clearance does not too big, the grinding work part of the blade continue to use, can improve the quality of stamping. When gap value too big when, the recoverable high temperature heat of local forging the modification methods female die size make it restored to the original gap value. Workpiece cooling followed by the pressure seal the law to file to trim gap value, and with the flame hardening method to improve the blade surface hardness. 2. Convex, concave die clearance does not even repair match means method Dies after a period of using, clearance does not even can make blunt a local produce burr or the blade was edge chewed. In normal wear punching die, because after wearing precision guide device that reduce convex, concave die happen relatively migration, respectively in the guide pin and a guide to cover on the plating chromium layer the restored to its original size, again through the pressure seal the law will remove file high. If it is due to the pins loosening lose positioning function and cause different convex, concave die heart, and cause convex, concave die clearance does not even. Should first will convex, concave die gap adjusting well, to match for taper pin. 11 參考文獻(xiàn) [1]陸茵 . 冷沖模具使用壽命的影響及對策 [J] 金屬加工（冷加工） 1950 4647. [2]謝昱北 . 《模具設(shè)計與制造》 .2020 年 北京 北京大學(xué)出版社 . [3]薛獸翔 . 《沖壓模具與制造》 .2020 年 北京 北京化學(xué)工業(yè)出版社 . [4]洪麗華 .陳永祿 . 中國模具工業(yè)現(xiàn)狀和模具技術(shù)發(fā)展趨勢 [J] 機(jī)電技術(shù) .2020年 第二期 9698 [5] CHEN Zhiming ZHANG Haiou WANG Guilan. China39。 Stamping Technology. 2020 年 05期 12