Finish machining method of camshaft

A camshaft and cam technology, which is applied in the field of mechanical processing, can solve the problems of base circle runout influence, base circle runout easily out of tolerance, etc.

Active Publication Date: 2014-07-16
GUANGXI YUCHAI MASCH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In the above process, factors such as the margin of the cam in the previous process, the error of the center hole, the pressure of the hydraulic cylinder driven by the top of the equipment, and the rigidity of the center frame will all affect the base circle runout
If the machine tool and the workpiece cannot maintain an ideal state, the base circle runout is easy to be out of tolerance

Method used

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  • Finish machining method of camshaft

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Embodiment Construction

[0011] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0012] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0013] like figure 1 As shown, the finishing method of the camshaft according to the specific embodiment of the present invention comprises the following steps successively:

[0014] Step 101, finishing the workpiece;

[0015] In step 102 and step 103, the precision grinding of the journal and the cam are carried out successively respectively, wherein the journal allowance is reserved in the process of precision grinding ...

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Abstract

The invention discloses a finish machining method of a camshaft. The finish machining method sequentially comprises the following steps that first, finishing is conducted on a workpiece; second, a shaft neck and a cam are accurately ground, wherein shaft neck allowance is reserved in the shaft neck accurate grinding process; third, the shaft neck at the farthest end of the workpiece which is completed in the second step is used as a supporting point to straighten the cam; fourth, fine grinding is conducted on the shaft neck. By the adoption of the method, it is guaranteed that cam base circle run-out of the camshaft can meet requirements, and therefore the machining precision of the camshaft is high.

Description

technical field [0001] The invention relates to the field of machining, in particular to a finishing method of a camshaft. Background technique [0002] The camshaft is one of the key components of the engine, and its machining quality directly affects the power performance of the engine. Among them, a key indicator on the camshaft is the cam base circle runout, that is, the radial circular runout of the cam base circle. The size of the cam base circle runout will affect the stability of the valve when it is closed, and then affect the formation quality of the mixed gas. It causes incomplete combustion and reduces the power of the engine. Therefore, its value must be closely monitored during processing. Generally, the radial circular runout tolerance of the cam base circle is 0.05 mm based on the common axis of the supporting journals at both ends of the camshaft. [0003] At present, the final size of the cam base circle of the camshaft is generally ground on a CNC CBN ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P9/00
CPCB23P9/02
Inventor 覃国杰
Owner GUANGXI YUCHAI MASCH CO LTD
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