Technology treatment method of machining deformation of long and thin hole shaft type thin-wall part

Abstract

The invention provides a technology treatment method of machining deformation of a long and thin hole shaft type thin-wall part, and aims at providing a technology treatment method of the machining deformation, which is simple in flow, and high in machining precision and yield. The method adopts the following technical scheme that the method comprises the steps that the long and thin hole shaft type thin-wall part after mechanical rough machining and carburizing treatment is subjected to quenching heat treatment, subzero treatment and low temperature tempering treatment. During the quenching heat treatment, the quenching cooling time is 8-11S / mm; when a surface temperature of the part falls to 30-50 DEG C, the part is lifted up from oil; the surface temperature of the part rebounds in air after some time; and when the part is cooled to 30-50 DEG C again, residual oil is rinsed cleanly by hot water greater than or equal to 60 DEG C. During the subzero treatment, the part is transferred to a -70 DEG C to -80 DEG C refrigerator box to be refrigerated for 2-2.5h within 1h after quenching, and then subjected to air cooling for 60-90min till the part reaches a room temperature. During the low temperature tempering treatment, the part is subjected to heat preservation for 3-4h at 160-180 DEG C and the air cooling. The method solves the problem of the machining deformation of the long and thin hole shaft type thin-wall part due to heat treatment stress, grinding stress and the like, and the yield reaches 100%.

Description

technical field [0001] The invention relates to a machining process and heat treatment process for shaft parts with an aspect ratio greater than 20, in particular to a comprehensive process treatment method for processing deformation of high-precision slender thin-walled blind-hole carburized shaft parts. Background technique [0002] Slender shaft parts refer to shaft parts with a ratio of length to diameter (aspect ratio) greater than 20. Parts with structures such as slender shafts are very easy to deform. The machining radial rigidity of thin-walled slender parts is very low, and it is easy to produce bending deformation under the action of cutting force and clamping force. For some typical difficult-to-machine parts, such as thin-walled, slender shaft parts, etc., bending and vibration are easily generated during the processing process, and there are often problems such as part deformation, size and surface roughness are not easy to guarantee. Slender shafts and thin-...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the above-mentioned technical solutions and completely solve the problem of piston rod processing deformation, the purpose of the present invention is to provide a processing method for processing deformation of thin-walled parts with slender holes and shafts with simple process, high processing accuracy and high pass rate.

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