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在全国各地的中小轴承厂中,很多新上马的轴承厂生产上很突出的问题就是轴承滚子毛坯的生产.首先是设备跟不上,滚子冷镦机及大吨位冲床目前远远供不应求,而中小轴承厂又难于自制.其次是冷镦工具消耗比较大,特别是滚子冷镦模具,一向就是轴承厂工具车间生产上的关键.我厂一般GCr15钢冲模的使用寿命甚低,只能冲制三千粒滚子左右.至于制造模具时由于锻造及热处理质量不佳,调整不当,模具损坏更是常见.硬质合金在滚子冲模上的应用至今尚未推广.除了因为硬质合金的抗张强度及冲击韧性低,易冲裂外,还因其需要电加工机床,模具加工要求也比较高,至于直径在(?)25毫米以上的滚子,现都采用车床车制,劳动生产率和材料利用率都很低.
In the small and medium-sized bearings factory in all parts of the country, many new bearing factory production is very prominent problem is bearing roller rough production.First, the equipment can not keep up, roller cold heading machine and large tonnage punch is far in short supply, While the small and medium-sized bearing factory and difficult to self-made.Secondly, the cold heading tool consumption is relatively large, especially the roller cold heading die, bearing factory has always been the key to the tool shop production plant GCr15 steel die life is very low, only Chong about 3000 roller about As for the manufacture of mold due to poor quality of forging and heat treatment, improper adjustment, mold damage is more common.Cartorium on the roller die on the application has not yet been promoted.Because the cemented carbide Tensile strength and impact toughness is low, easy to break, but also because of the need for electrical processing machine tools, mold processing requirements are relatively high, as the diameter (?) 25 mm above the roller, are using lathe car system, labor productivity And material utilization is low.