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wheel weight spring clip process

times   2018-12-03

a. When the overall clamping type wheel weight balance block is developed, the processing process of the clip starts from the opening of the material, and the steel strip is subjected to annealing and metallographic examination before the material is opened. The result is that each batch of material In the metallographic structure, the grain size is different, which affects the quality of stamping (some cracks appear during the formation of the clip), resulting in the scrapping of the entire clip. After the two processes of annealing and metallographic examination are added, the occurrence of cracks is avoided, and the quality of the forming process is ensured.

b. For the quenching and tempering process of the parts, when the development is started, the clips are placed in a well-type furnace for heating and heat preservation, and then the central sheets are taken out to the oil tank for quenching. Due to the small amount of hot melt of the clip, during the process of taking out the furnace and sending it to the oil tank, the temperature of the outer clip is lowered rapidly in a frame, and the quenching temperature of the whole batch is different, resulting in some clips failing to be quenched. Hard, so that the clamping force of the integral clamp type counterweight balance block on the rim is insufficient, and the wheel rotates at a high speed. The balance block will fall off. Later, a thick steel plate was attached to the upper surface of the frame. At the same time, heating and heat preservation in the pit furnace, in order to reduce the temperature during the quenching process, but the effect is not satisfactory. To this end, the horizontal quenching furnace and the tempering furnace are used to quench and temper the central sheet. The clips are evenly placed on the conveyor belt of the box furnace. When the clips are transported into the furnace, the furnace is placed. Warm to the quenching temperature. The conveyor belt can be moved in a box furnace to ensure the holding time. In the case that the temperature in the box furnace has not changed, the clips are automatically removed from the conveyor belt and the quenching oil tank is automatically removed, thereby ensuring the uniform hardness of the entire batch of the clips, and the quality of the finished product is guaranteed.

c. Before plating the clips in the electroplating workshop, the stamped central sheets need to be pickled to remove oil stains and rust on the surface of the parts. When the clip is pickled, it causes hydrogenation of the clip, which makes the result unsatisfactory. After repeated trials, the dehydrogenation temperature and time requirements were obtained. Later, the dehydrogenation process was changed to the heat treatment car, and the heat treatment furnace was carried out with good results.

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