Fillet rolling technology for automobile air compressor crankshaft

Abstract

The invention relates to a fillet rolling technology for an automobile air compressor crankshaft, which is characterized in that a working procedure of crankshaft fillet rolling is added between a working procedure of roughly grinding a connecting rod journal and finely grinding a connecting rod journal. In the working procedure of rolling, a rolling wheel of which the fillet diameter is less than that of an under cutting slot is used for rolling. In the crankshaft fillet rolling technology , the excircle of the journal is finely grinded after rolling, a rolling intensified layer in the under cutting slot is effectively reserved; the crutch inside and the crutch outside of the connecting rod journal are rolled in a sinusoidal impulse mode, and crankshaft flexural deformation is reduced. The fatigue resistance of the automobile air compressor crankshaft processed by the technology is improved, and the flexural deformation is simultaneously lowered, product performance is improved, and a product rejection rate is lowered.

Description

technical field [0001] The invention belongs to the technical field of automobile manufacturing, and relates to a fillet rolling process of a crankshaft, in particular to a fillet rolling process of a crankshaft journal deep groove of an automobile air compressor. Background technique [0002] In the car, the air compressor is mainly used for braking, and its safe and efficient operation is one of the important prerequisites for the safe operation of the car. The crankshaft is an important part of the air compressor that bears impact loads and transmits power. In each working stroke of the air compressor, a large alternating load acts on the crankshaft through the piston and connecting rod assembly, making it withstand repeated loads. shock. Because the crankshaft is under the action of alternating stress, the risk of stress fatigue and strain fatigue damage at the transition fillet of the journal section change is extremely high. [0003] Increasing the anti-fatigue stren...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problem that the crankshaft of the existing automobile air compressor adopts the conventional rolling process to produce bending deformation and is difficult to correct, the present invention proposes a fillet rolling process for the deep groove of the crankshaft journal of the automobile air compressor, which can make the air compressor The crankshaft has improved fatigue strength while reducing its bending deformation to improve product performance and reduce product scrap rate

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