Machining method for high-power high-pressure common-rail cam shaft

Abstract

The invention discloses a machining method for a high-power high-pressure common-rail cam shaft comprising the following steps of blanking of a forging blank, milling of the total length and drilling of center holes in the two ends, turning of a reference outer circle, rough turning of outer circles of a short head of a workpiece, rough grinding of reference shaft diameters, finish milling of a cam, finish turning of outer circles of a long head end, thread rolling, workpiece cleaning, heat treatment, accurate grinding of reference shaft diameters at the two ends, accurate grinding of the cam; finish turning of the outer circles, an end face and a boss / annular groove; mark printing, comprehensive inspection and cleaning; packaging and warehousing. According to the machining method for the high-power high-pressure common-rail cam shaft, detection is convenient, clamping is stable, the supporting and stabilizing effect is good, and the rate of finished products is high.

Description

technical field [0001] The invention relates to the field of camshafts, in particular to a machining method for a high-power high-pressure common-rail camshaft. Background technique [0002] The camshaft is a component in a piston engine. Its function is to control the opening and closing of the valve. Although the speed of the camshaft in a four-stroke engine is half that of the crankshaft (the speed of the camshaft is the same as that of the crankshaft in a two-stroke engine), it usually still has a high speed and needs to withstand a large torque, so the design of The camshaft has high requirements on strength and support, and its material is generally high-quality alloy steel or alloy steel. In the existing processing and production, the machining of the camshaft needs to be measured many times, including the coaxiality of the main shaft, etc. Relying on the traditional method lacks the device for workpiece measurement, and the dial indicator cannot accurately correspo...

AI Technical Summary

Problems solved by technology

In the existing processing and production, the machining of the camshaft needs to be measured many times, including the coaxiality of the main shaft, etc. Relying on the traditional method lacks the device for workpiece measurement, and the dial indicator cannot accurately correspond to the position of the main shaft between the cams after moving At the same time, because the camshaft needs to be ground many times, the existing fixture has the following defects for the positioning of the camshaft:

[0003] 1. The clamping effect is poor, and the clamping position cannot be adjusted, which reduces the practicality;

[0004] 2. At the same time, it cannot play a good role in supporting and stabilizing the processed products

[0005] 3. After disassembly and assembly, it needs to be repositioned

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