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鏈輪的沖壓工藝及模具設(shè)計
摘 要
通過對制件的工藝計算及拉深翻邊時的受力，應(yīng)力及金屬流動狀態(tài)進行分析，設(shè)計并改進了反拉深模的結(jié)構(gòu)，保證了零件尺寸的要求，消除了料厚變薄等缺陷，此模具結(jié)構(gòu)簡單，實用性強，提高勞動生產(chǎn)率，為防止制件起皺和拉裂常通過改善材料力學(xué)性能和合理確定凹模圓角半徑，同時分析了該制件的工藝性。設(shè)計了拉深模具，并介紹了所用模具材料特點。
拉深是利用拉深模具將沖裁好的平板毛坯壓制成各種開口的空心工件或?qū)⒁阎瞥傻拈_口空心件加工成其他形狀空心件的一種沖壓加工方法。翻邊時將毛坯或半成品的外邊緣或孔邊緣沿一定的曲線翻成豎立的邊緣沖壓方法的鏈輪是需要經(jīng)過拉深翻邊，沖孔等工序才可完成。
當(dāng)前模具工業(yè)發(fā)展有兩個特點：一是要縮短制模周期、降低制模成本。由于人們對工業(yè)晶的品種、數(shù)量和質(zhì)量要求越來越高，產(chǎn)品更新?lián)Q代周期越來越短，而且多品種小批量生產(chǎn)較多，因此對模具制造提出了嚴(yán)格的要求。二是模具向大型化、復(fù)雜化、精密化和自動化發(fā)展。模具制造要求越來越高，制造工藝越來越復(fù)雜。
關(guān)鍵詞：拉深模 設(shè)計 料厚變薄 改進
鏈輪的沖壓工藝及模具設(shè)計
Abstract
Through the technological calculation of the product and the analysis of the exerted force ,stree and metal flowing status when drawing for ward and backward,the back ward drawing die was desingal and improved in its structure,which ensured the requirement of the part dimensions and eliminated some defects such as the material thickness becoming thinner,The structure of the die for the technological process is simple and practical,it can increase the production efficiency,in order to ensure the uniformity of the blanking clearance of the die ,inorganic adhesive is used to bord and fix the punch to eliminate manufacturing errors,after an analysis of the technological property of the producte,the dimensions of the blank were determined and the drawing die for the part was designeal the characteristics of the die material were introduced at last.
Keywords: backward drawing die design material thickness getting thinner improvement