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Processing process of automobile engine crank shaft

A technology of automobile engine and processing technology, applied in the field of mechanical processing, to achieve the effects of less harmful elements, enhanced wear resistance, and improved toughness

Active Publication Date: 2015-03-04
ANHUI JINQINGLONG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically solve the three problems of rigidity, wear resistance and good lubricity of the existing automobile engine crankshaft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0027] A kind of processing technology of automobile engine crankshaft, its processing steps are as follows:

[0028] (1) Forging blanks: Forging high-quality alloy steel 35CrMo blanks, the forging temperature is controlled at 1150°C~1200°C, and the specific control is 1180°C.

[0029] (2) Rough turning: rough turning main journal and connecting rod neck.

[0030] (3) Rough drill: rough drill main oil hole.

[0031] (4) Annealing heat treatment: Carry out annealing heat treatment on the workpiece, the temperature is controlled at 850°C~900°C, the specific control is 880°C, the time is 5~8 minutes, and the specific time lasts for 7 minutes.

[0032] (5) Semi-finished car: semi-finished car main journal and connecting rod neck.

[0033] (6) Quenching and tempering: Quenching and tempering treatment of the workpiece, including high-frequency quenching and low-temperature tempering. The quenching temperature is 800°C~850°C, the specific control is 830°C, the holding time is 8~1...

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Abstract

The invention provides a processing process of an automobile engine crank shaft. The process comprises the following processing steps of (1) blank forging; (2) coarse tuning: coarse turning of a main shaft neck and a connecting rod neck is carried out; (3) coarse drilling: coarse drilling of a main oil hole is carried out; (4) annealing heat treatment; (5) semi-finish turning: semi-finish turning is carried out on the main shaft neck and the connecting rod neck; (6) tempering; (7) fine turning: fine turning is carried out on the main shaft neck and the connecting neck; (8) coarse and fine grinding: coarse and fine grinding is carried out on the main shaft neck and the connecting rod neck; (9) hole drilling: coarse drilling, expanding and reaming of balance block installing holes and inclined oil holes are carried out; (10) compounding reinforcing; (11) rolling processing: each processed hole is subjected to rolling pressing processing; (12): the main shaft neck and the connecting rod neck are subjected to polishing processing; (13) anti-rust processing; (14) inspection and packaging. The process solves three problems of low rigidity intensity, poor wear resistance and good lubrication performance in the existing automobile engine crank shaft production process, so that the finally produced crank shaft has the sufficient rigidity and intensity, good impact load bearing capability and good abrasion resistance and lubrication performance.

Description

[0001] technical field [0002] The invention relates to the technical field of mechanical processing, in particular to a processing technology for an automobile engine crankshaft. Background technique [0003] The crankshaft is an important part of the automobile engine. It cooperates with the connecting rod to convert the gas pressure acting on the piston into rotational power, which is transmitted to the transmission mechanism of the chassis, and at the same time, drives the gas distribution mechanism and other auxiliary devices. When the crankshaft is working, it is affected by gas pressure, inertial force and moment of inertia, and the force is large and complex. At the same time, the crankshaft is a high-speed rotating part. Therefore, the crankshaft is required to have sufficient rigidity and strength, and has good impact resistance. Load capacity, wear resistance and good lubrication. [0004] The current machining process of the crankshaft of the automobile engine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14B23P2700/07
Inventor 左克祥刘治盛张国化
Owner ANHUI JINQINGLONG MACHINERY
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