On -line detection equipment for automobile engine cylinder body

Abstract

The invention relates to on-line detection equipment for an automobile engine cylinder body and belongs to the technical field of on-line precision measurement. The equipment comprises a substrate platform; a motor fixed on the upper part of the substrate platform is connected with a lead screw guide rail through a coupler; an engine cylinder body detection workbench is arranged above the guide rail; and an engine cylinder body is placed on the detection workbench. A cylindricity measurement substrate is arranged on the substrate platform; a high-precision guide rail is arranged on the cylindricity measurement substrate; a cylindricity measurement adapter plate is connected with a guide rail sleeve; motors, high-precision air bearings and displacement sensors form four groups of cylindricity measurement mechanisms which are arranged on the adapter plate; and a cylindricity measurement motor drives the air bearings to rotate to drive the displacement sensors to rotate to perform measurement. A stepping motor drives the cylindricity measurement adapter plate to move up and down along the guide rail through a synchronous belt to realize the measurement of a cylinder hole of an engine. The substrate platform is fixedly provided with a cylinder height measurement substrate and is provided with the displacement sensor to realize the measurement of the cylinder body height of the engine.

Description

technical field [0001] The invention relates to an on-line detection device for an automobile engine cylinder, belonging to the detection field. Background technique [0002] The automobile engine block is the installation base of various mechanisms and systems of the engine. The processing quality of the cylinder block is particularly important, especially the position size and shape and position tolerance of the hole distance are the basis for ensuring the assembly and operation life of the engine. However, due to its complex structure, for a long time in China, the cylinder body has been sampled and measured mainly through the inter-process detection equipment installed on the production line. In addition, the testing methods of many manufacturers are quite backward, mainly using mechanical measuring tools, such as bore gauges, etc. as testing tools, which have low detection accuracy, single detection parameters, low detection efficiency, and cannot detect parameters suc...

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Problems solved by technology

[0003] At present, there are few domestic researches on online detection of engine block, and there are few parameters of engine block detection for related research. For example, the automatic measurement machine for engine block based on pneumatic measurement developed by Dongfeng Motor Co. 4 cylinder bore diameters and 5 main bearing bore diameters, but this automatic measuring machine does not have multi-parameter comprehensive measurement functions such as cylinder bore cylindricity and position degree

Based on the CA488 engine block main bearing hole comprehensive measuring instrument developed by FAW Group Corporation, it can detect the main bearing hole size, roundness and coaxiality, but this measuring instrument is only for the cylinder main bearing hole, and does not realize the hole measurement

Domestic Sanmenxia Zhongyuan Measuring Instrument Co., Ltd. has developed an online comprehensive cylinder measuring instrument, which can detect the diameter, roundness, and cylindricity of the cylinder bore and grade the diameter. The pneumatic measurement method is used to measure three Each section measures four sampling points, but there is no measurement of cylinder bore position parameters, and only 12 sampling points are measured, and the result is only an approximate value of cylindricity

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