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0前言 随着国内汽车工业的迅猛发展,而活塞环的需求量及质量要求也日益提高。市场上优质名牌活塞环供不应求,镀铬环更为看好。对活塞环制造厂来说:镀铬环由于其价格高、销路好、使用寿命长等特点。被各厂列为企业发展的重点。但镀铬环的生产由于其工序多、工艺复杂、能耗大、废品率高等因素。各厂在镀环生产中却面临着如何提高其工艺性?如何降低其生产成本?如何提高其成品率问题,而这些问题已成为各厂科技人员共同关心的课题。现就我们在这一领域内进行的探讨提供大家参考。1提高镀铬层均匀度是减少镀层厚度的有效方法 在镀铬环生产过程中耗时、耕能最大的工序是电镀。通常镀铬活塞环成品镀层厚度最低要求为0.08～0.12mm。而在生产过程中考虑到工艺的加工可能性,各厂在电镀时镀层厚度一般为0.18～0.22mm。然后再经过各种形式的加工将镀铬层去掉。这样,一方面由于镀层厚,要耗用大量的电能及铬酐,另一方面由于镀层的增厚,容易在镀层表面形成铬瘤、毛刺等,对结合力不利。另外由于铬层的机械特性,在加工过程中是十分耗时、耗工装的,这本身就是一种浪费。分析其原因主要有以下几点:
0 Foreword With the rapid development of the domestic automobile industry, the demand and quality requirements of piston rings are also increasing. High-quality brand-name piston ring on the market in short supply, more optimistic about the chrome ring. For the piston ring manufacturer: chrome ring due to its high price, good sales, long service life and so on. The factory was listed as the focus of business development. However, the production of chrome ring because of its many processes, complex technology, energy consumption, high rejection rate and other factors. How to reduce the cost of production and how to improve the yield of the finished products? How to improve the manufacturability? How to improve the manufacturability? Now we are in this area to explore for your reference. 1 to improve the uniformity of chrome layer is an effective method to reduce the thickness of the coating Chromium ring in the production process takes the time to cultivate the largest process is electroplating. Usually chrome plated piston ring finished coating minimum thickness of 0.08 ~ 0.12mm. In the production process, taking into account the possibility of processing technology, the plating thickness of the plant is generally 0.18 ~ 0.22mm. Then through various forms of processing to chrome layer removed. In this way, on the one hand due to coating thickness, to consume a large amount of electricity and chromic anhydride, on the other hand due to the thickening of the coating, easy to form chromium plating on the coating surface, burrs, etc., on the bonding force. In addition due to the mechanical properties of chromium layer in the processing is very time-consuming, labor-intensive, which in itself is a waste. Analysis of the main reasons are the following: