Forming process of large conic roller blank

Abstract

The invention discloses a method for forming a large blank tapered roller, which belongs to the cold extrusion forming process. The specific process is as follows: firstly, the metal bar is cut into material sections of required specifications; the outer circle of the material section is ground and smoothed to The required outer diameter size; put the above-mentioned smooth material section after grinding into the upper and lower molds; place the upper and lower molds in the extrusion equipment for extrusion, and control the pressure at 200-800 tons; remove the upper mold, and use The positioning rod (cutting material) rod is extended from the lower die hole to eject the extruded large tapered roller blank, and finally the flash on the blank is removed before finishing to obtain the large tapered roller. This process solves the problems of low steel utilization rate, low production efficiency, and more equipment and production labor in the turning forming process, which is conducive to improving the processing efficiency and precision of the previous process of the roller, and can also moderately improve the compactness of the roller. Sex, and avoid problems such as cracking when the deformation is large.

Description

technical field [0001] The invention relates to a forming processing method, in particular to a forming method of a large blank tapered roller. Background technique [0002] The traditional tapered roller forming process mainly includes turning forming (suitable for large tapered rollers) and cold heading impact forming (suitable for small, medium and small-sized tapered rollers). The turning forming process is to place the material bar on the lathe to process the chamfering and end surface shape at one end, and then cut it according to the required length, and then turn the cut material section around and use another lathe to process the chamfering cavity at the other end, although Its shape and size processing parameters are easy to adjust, but the steel utilization rate is not high (usually only 60-70%), the process is complicated, the production efficiency is low, and the production equipment and labor are more. Cold heading impact forming has the advantages of high uti...

AI Technical Summary

Problems solved by technology

The turning forming process is to place the material bar on the lathe to process the chamfering and end surface shape at one end, and then cut it according to the required length, and then turn the cut material section around and use another lathe to process the chamfering cavity at the other end, although Its shape and size processing parameters are easy to adjust, but the steel utilization rate is not high (usually only 60-70%), the process is complicated, the production efficiency is low, and the production equipment and labor are more

Cold heading impact forming has the advantages of high utilization rate of raw materials, high production efficiency, and less equipment and labor. However, the processing range of the largest roller cold heading machine in China is rollers with an outer diameter of no more than 25mm, and rollers with a diameter larger than 25mm. Heading machine, and because of the extremely low useful work in theory, it cannot be used in actual production and other defects

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