In the phosphating process of steel cold forging, acid washing is generally used to remove the oxide film on the blank. This paper introduces that using shot blasting process instead of pickling method can greatly reduce industrial pollution, reduce production cost and improve process quality.

Shot blasting strengthening treatment is one of the key processes of forming anti roll torsion bar shaft. The initial surface roughness and hardness of anti roll torsion bar shaft before shot blasting are important factors affecting the surface roughness after shot blasting. Three quenched and tempered round steels with different hardness were processed to form samples with five grades of roughness, and the same shot blasting process was used to strengthen the shot blasting of the samples at the same time.

Fast and slow wire cutting processing is divided into fast wire walking and slow wire walking. Ordinary wire cutting is generally calculated according to the wire cutting area, and the workpiece height is also high, and the corresponding price will be high. The price of slow wire cutting is about 10 times that of ordinary wire cutting. In Jiangsu and Zhejiang provinces, the slow wire processing is generally 60 yuan per hour (the average cutting efficiency is 40-60mm / min), but the cutting of molds with higher precision is 80 yuan, because once scrapped, the material cost needs to be paid.

In the actual cutting process of Dalian fast and slow wire cutting, the workpiece is often cut immobile, and sometimes it is impossible to cut at all. This situation generally occurs when cutting high thickness or cutting difficult materials such as stainless steel. The fundamental reason is that the working fluid does not have good characteristics of removing corrosion products. The emergency way is to add some detergent or increase the concentration of the working fluid, But the fundamental way is to use a good working fluid.