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A method for optimizing the clamping method of engine cylinder block and cylinder head

A technology of engine cylinder block and clamping, which is applied in the direction of mechanical roughness/irregularity measurement, etc., can solve the problems of large clamping deformation and other problems, and achieve the effect of improving flatness, ensuring performance, and ensuring air tightness

Active Publication Date: 2019-04-16
DALIAN UNIV OF TECH
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  • Claims
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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention measures the flatness of the engine block and the cylinder head based on the method of directly measuring the readings of the dial indicator, and measures the top surface of the engine block and the bottom surface of the cylinder head by changing the clamping method of the workpiece. Carry out processing and measure its flatness tolerance. By comparing the flatness of the processing plane under each clamping mode, select the better clamping mode to solve the large clamping deformation of the gasoline engine cylinder block and cylinder head during high-speed precision machining. The problem

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  • A method for optimizing the clamping method of engine cylinder block and cylinder head
  • A method for optimizing the clamping method of engine cylinder block and cylinder head
  • A method for optimizing the clamping method of engine cylinder block and cylinder head

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Embodiment Construction

[0028] The present invention proposes a method for optimizing the clamping mode of the engine cylinder block and the cylinder head for the rapid milling of the cylinder block and the cylinder head of the automobile engine. By measuring and comparing the flatness of the top surface of the cylinder block and the bottom surface of the cylinder head, the optimum Excellent clamping method. Include the following steps:

[0029] The first step is to design a set of manual clamps according to the shape and structure of the gasoline engine cylinder block and cylinder head.

[0030] In the second step, the maximum number of clamping points on the cylinder is determined to be six, and four kinds of clamping point distribution schemes are designed, which are: a) six-point symmetrical and uniform distribution, b) four-point symmetrical and uniform distribution, c) Four-point non-uniform distribution, d) four-point non-uniform distribution, as shown in Figure 1(a), Figure 1(b), Figure 1(c)...

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Abstract

The invention puts forward an engine cylinder body and cylinder cover clamping mode optimizing method to solve a problem that a clamping tool tightens and greatly deforms when a petrol engine cylinder body and a petrol engine cylinder cover are subjected to high speed precision processing operation. According to shape structures of the petrol engine cylinder body and the petrol engine cylinder cover, a hand-operated clamping tool is designed. According to the number clamping points on the cylinder body and the cylinder cover, different clamping modes are designed. The cylinder body and the cylinder cover are subjected to high speed milling experiments in different clamping modes, and an optimal clamping mode is obtained after flatness degrees of a top face of the cylinder body and a bottom face of the cylinder cover are measured and compared with each other. Via adoption of the engine cylinder body and cylinder cover clamping mode for high speed cutting processes obtained through the optimizing method disclosed in the invention, the flatness degrees of the top face of the cylinder body and the bottom face of the cylinder cover can be improved, airtightness can be increased after the top face of the cylinder body and the bottom face of the cylinder cover are assembled, and application performance of an engine can be ensured.

Description

technical field [0001] The invention belongs to the technical field of fixture clamping for high-speed machining planes of gasoline engine cylinder blocks and cylinder heads, and relates to a method for optimizing the clamping mode of engine cylinder blocks and cylinder heads. This method obtains the optimal clamping method by measuring and comparing the flatness of the top surface of the cylinder block and the bottom surface of the cylinder head. Background technique [0002] The engine is the most important part of the car. The top surface of the engine block and the bottom surface of the cylinder head belong to a pair of assembly joint surfaces. The machining accuracy of them directly determines the assembly of the two joint surfaces, thereby determining the airtightness of the engine. Therefore, in order to improve the machining accuracy, it is first necessary to measure the machining accuracy of the pair of joint surfaces. By changing the clamping mode and comparing the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/28
CPCG01B5/28
Inventor 丛明刘冬毕京宇
Owner DALIAN UNIV OF TECH
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