Cold-extruding forming method of small toothed blind perforated part

Abstract

The invention discloses a cold-extruding forming method of a small toothed blind perforated part. The method comprises the following steps: blanking, namely cutting a steel wire coil stock into segments and leaving excessive materials at two ends of the segments; shaping, namely carrying out upset-extruding on the segments in a shaping mold, and extruding excessive waste materials out of the shaping mold; carrying out deburring, namely carrying out deburring on a shaped blank with a grinding material and grinding solution, washing with water and drying; and carrying out gear extruding on one end of the deburred blank by a gear extruding mold. According to the cold-extruding forming method of the small toothed blind perforated part, a machining chipping procedure exists in the whole production process, the impact extrusion method is completely adopted for forming, and the formed product has smooth surface and high form and position accuracy, and can completely achieve the requirements on the shape and the size precision, specified by an end-product drawing; and in the processing technique, few processing procedures are needed, good product consistency and full tooth form can achieved, damaged tooth is avoided, the effects of stable and reliable quality can be achieved, the utilization rate of the material is high, and the cost is low, and the cold-extruding forming method is suitable for volume production of precise small toothed parts.

Description

technical field [0001] The invention relates to a cold extrusion forming method of a small-tooth-shaped blind-tooth piece. Background technique [0002] At present, the precision cold extrusion of tooth-shaped parts is mainly used in through-tooth processing, and for blind tooth cold extrusion, especially for precision small tooth-shaped parts like mushrooms, the blank needs to be machined and removed after being extruded by ordinary cold extrusion. When machining, it is difficult to cut off the waste because the workpiece has no reliable and stable clamping surface and positioning surface. Therefore, there are two common methods: the first one: use the bar to complete the car shape on the CNC lathe, Gear hobbing, cutting, and after that, manual deburring of the end face. The disadvantages of this method are: 1. the production efficiency is very low, and mass production is not possible; 2. the production cost is high; 3. after hobbing, the tooth shape is not full, there are...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: 1. The production efficiency is very low, and mass production is not possible; 2. The production cost is high; 3. After hobbing, the tooth profile is not full, there are many bad teeth, and the tooth profile shape is poor.

The disadvantages of this method are: 1. The efficiency of machining blanks is low; 2. The production cost is high; 3. After hobbing, the tooth profile is not full, there are many bad teeth, and the tooth profile shape is poor.

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