Current status of crankshaft processing technology equipment

At present, most of the older crankshaft production lines in China are composed of ordinary machine tools and special machine tools, and the production efficiency and automation are relatively low. The roughing equipment generally uses a multi-tool lathe to turn the crankshaft main journal and the connecting rod journal. The process quality is poor, and it is easy to generate large processing stress, and it is difficult to achieve a reasonable machining allowance. Finishing is generally carried out by ordinary crankshaft grinders such as MQ8260 for rough grinding, semi-finishing, fine grinding and polishing, usually by manual operation, the processing quality is unstable, and the dimensional consistency is poor.

One of the main features of the old-fashioned production line is that there are too many ordinary equipment. According to the processing of the ductile iron crankshaft, a production line has 35 to 40 sets of equipment. The author has examined a domestic forged steel crankshaft production line, rough machining using ordinary external milling to machine the main journal and connecting rod neck, then CNC fine car main shaft and connecting rod neck, and then through multiple processes of grinding to the finishing Process. Therefore, this production line has more than 60 sets of equipment, resulting in a long product turnover line and a large area occupied by the site. The production efficiency is completely improved by the decomposition process and margin of multiple equipments.

Conclusion

The above mainly discusses the progress of crankshaft machining from the aspect of crankshaft machining. It can be concluded that the crankshaft multi-tool turning process will gradually withdraw from the historical stage, although this period is longer; high-speed and efficient machining has been quite advanced in the crankshaft manufacturing industry. Application; suitable for multi-variety, small batch composite processing technology is a development direction of crankshaft processing in the future; the improvement of cutting performance provides technical guarantee for high-efficiency, high-speed, composite processing development.