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Variable multi-point locating cylinder barrel deformation testing clamp and testing method

A multi-point positioning and measuring fixture technology, which is applied in the direction of measuring devices, manufacturing tools, workpiece clamping devices, etc., can solve problems such as inability to complete the measurement at one time, affecting measurement accuracy, and cylinder deformation, so as to shorten the development cycle and save Prototype costs and the effect of reducing test costs

Inactive Publication Date: 2012-07-11
FAW GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The international general measurement method is to clamp the instrument directly on the cylinder, and the clamping force will deform the cylinder, which seriously affects the accuracy of the measurement; since the jaws of the cylinder deformation instrument are generally 40mm, the cylinder must have at least 40mm Unable to complete the measurement in one go

Method used

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  • Variable multi-point locating cylinder barrel deformation testing clamp and testing method
  • Variable multi-point locating cylinder barrel deformation testing clamp and testing method
  • Variable multi-point locating cylinder barrel deformation testing clamp and testing method

Examples

Experimental program
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Embodiment Construction

[0017] The clamp 1 of the present invention is composed of a rim 5 and a cylinder 6, on which an adjusting screw 2 is installed. The measuring instrument 4 is concentrically installed on the fixture 1, and then placed in the cylinder 3 for measurement.

[0018] The measurement method of fixture of the present invention is:

[0019] a. The rotating ring gear of the measuring instrument drives the positioning claw to expand or contract inward, and the measuring instrument is "squeezed" into the fixture by applying a certain clamping force, and is clamped with the fixture, and the center of the measuring instrument is coaxial with the center of the fixture;

[0020] b. Install the fixture on the three-jaw chuck of the indexing plate, rotate the chuck and use the altimeter to measure the unscrewing height of the adjustment screw; the height measurement process is: install the fixture on the three-jaw chuck of the indexing head , the clamping process is automatically centered to e...

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PUM

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Abstract

The invention discloses a variable multi-point locating cylinder barrel deformation testing clamp and a testing method, belonging to the field of engine function test equipment. The invention aims to design the variable multi-point locating cylinder barrel deformation testing clamp as a special clamp for precisely testing a cylinder barrel and the testing method. The clamp provided by the invention consists of an edge and a barrel body, wherein the barrel body is provided with a through adjusting screw. The variable multi-point locating cylinder barrel deformation testing clamp and the testing method adapted to the variable multi-point locating cylinder barrel deformation testing clamp in the invention have the advantage that a variable three-point locating cylinder barrel deformation test instrument is adopted in an engine cylinder barrel deformation test so that problems existing in the traditional testing process are well solved.

Description

technical field [0001] The invention belongs to the field of engine function test equipment. Background technique [0002] Cylinder deformation has a significant impact on engine operation. It affects oil consumption, gas blow-by in cylinder, friction work, cylinder wear, fuel consumption and exhaust emissions, etc. Therefore, cylinder deformation test is indispensable in the engine development process. Its test data directly affect the design and performance of the engine, and it is one of the most important functional tests. [0003] The following problems exist in the measurement process of the portable cylinder deformation measuring instrument: [0004] 1. The international general measurement method is to clamp the instrument directly on the cylinder, and the clamping force will deform the cylinder, which seriously affects the accuracy of the measurement; since the jaws of the cylinder deformation instrument are generally 40mm, the cylinder must have at least 40mm The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00G01B21/32B25B11/00
Inventor 佀庆涛谷华蒋文虎李天成
Owner FAW GROUP
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