Precise near-net forming technology and device for bevel gear shaft

Abstract

The invention discloses a precise near-net forming technology and device for a bevel gear shaft. The technology comprises the following steps of (a) precise saw cutting of a bar; (b) annealing treatment; (c) blank lubrication by adopting a high polymer lubricant; (d) conical blank preforming through cold heading: preliminarily preforming the blank according to a bevel angle of the bevel gear shaft and the shape of a shaft step and laying a foundation for next near-net forming of a bevel gear and a step shaft; (e) molybdenum disulfide lubrication: mixing molybdenum disulfide powder and engine oil at a ratio of (30-40wt%):(60-70wt%), coating the surface of the preformed blank with the prepared molybdenum disulfide and directly putting the preformed blank into a near-net forming die for molding; (f) precise near-net forming: forming the bevel gear shaft on a precise near-net forming device; (g) machining according to the requirements; and (h) forming of a product. The forming device comprises four parts, such as a set of combined bevel gear die, a set of combined step shaft die, a reinforcing plate and an ejector stopper.

Description

technical field [0001] The invention relates to the controlled forming technology of a bevel gear (bevel gear) shaft and metal materials, and belongs to the field of mechanical equipment manufacturing industry. Specifically, it is a precision near-net shaping process and device for bevel gear (bevel gear) shafts, which is suitable for precision near-net shaping of bevel gear shaft parts such as automobiles, tractors, motorcycles, aviation, ships, and tanks in large quantities. Background technique [0002] At present, the shaft parts of bevel gears are usually processed by milling machine chips or hot die forging. Machining has problems such as low tool life, high cost, poor dimensional uniformity of products, low production efficiency, and low material utilization. Due to heating, the surface roughness of the bevel gear and the shaft needs to be refinished due to heating, which requires many processes and consumes a lot of energy. With the rapid development of the steam t...

AI Technical Summary

Problems solved by technology

Machining has problems such as low tool life, high cost, poor dimensional uniformity of products, low production efficiency, and low material utilization rate.

Due to heating, the surface roughness of the bevel gear and the shaft is poor, and the hot die forging requires refinishing, which requires many processes and consumes a lot of energy.

With the rapid development of the steam tray industry and military equipment such as helicopters, ships, and tanks, and the high-performance requirements, the traditional milling machine chip processing and hot die forging methods can no longer meet the increasing market demand for large quantities and high quality.

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