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Size measurement method for matching relationship of automobile outer panels

An outer cover and matching relationship technology, applied in the field of precision measurement, can solve the problems affecting the accuracy of measurement results, deviation of measurement data, inaccurate location of measurement points, etc., to save online debugging time, improve use efficiency, and improve measurement. The effect of precision

Active Publication Date: 2019-11-12
CHINA FIRST AUTOMOBILE +1
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Problems solved by technology

[0002] When measuring the matching gap surfaces of automobile outer covering parts, manually grabbing points in the measurement software in the past may cause inaccurate measurement points due to rebound or deformation of the outer covering parts, and the deviation of measurement data cannot be correctly guided Production
[0003] At present, there is no professional open programming software for customers who need to measure the gap
Due to the characteristics of large rebound and easy deformation of automobile outer covering parts, the traditional grasping method may affect the accuracy of the measurement results due to the deformation of the test parts

Method used

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  • Size measurement method for matching relationship of automobile outer panels

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Embodiment Construction

[0063] The present invention is described in detail below in conjunction with accompanying drawing:

[0064] A method for measuring the size of the matching relationship of an automobile outer cover, comprising the following steps:

[0065] 1. Making measurement points

[0066] First, select the single-chip digital model of the product in the CATIA software, and then use it to lay out the measurement points. The measurement points need to be arranged on a single digital model. If it is a solid digital model, the surface should be truncated after extracting the surface, otherwise the required curve cannot be extracted.

[0067] The layout principle of the measurement points: distribute a column of measurement points every 50 mm around the digital model outline of the fender single-piece product (some key areas are properly encrypted, such as the eagle beak area matching the headlights, the fist area matching the A-pillar and On both sides of the ridge line) three points are ...

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Abstract

The invention belongs to the technical field of precision measurement and relates to a size measurement method for a matching relationship of automobile outer panels. The method comprises the steps of(1) making measuring points in CATIA software, making a reflection line, extracting an R tangent point line, making normal planes of curves to determine an intersection point, importing a point filemade by the CATIA into Metrolog software; (2) carrying out off-line programming by using IDA, importing a to-be-measured product mathematic model and a bracket mathematic model into the IDA software,importing a DMO file output by the Metrolog into the IDA, creating a measuring sequence to select measuring machine parameters, defining a sequence name to select the rod length and corner division, setting measuring point parameters and an alignment relationship and carrying out analogue simulation to examine collision; and carrying out statement conversion of a DMIS program, importing statementsinto the Metrolog software and identifying an angle conversion command in the DMIS program, thereby achieving measurement work. According to the size measurement method, clearance plane detection points of the automobile outer panels are accurately grabbed; the effects of workpieces on the measurement effect due to slight deformation are avoided; the online debugging time of equipment is shortened through virtual debugging of a measuring program; and the measurement accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of precision measurement, and relates to a size measurement method for the matching relationship of an automobile outer cover. Background technique [0002] When measuring the matching gap surfaces of automobile outer covering parts, manually grabbing points in the measurement software in the past may cause inaccurate measurement points due to rebound or deformation of the outer covering parts, and the deviation of measurement data cannot be correctly guided Production. [0003] At present, there is no professional open programming software for customers who need to measure the gap. Due to the characteristics of large rebound and easy deformation of automobile outer covering parts, the traditional grabbing method may affect the accuracy of measurement results due to the deformation of the test parts. Contents of the invention [0004] In order to meet the customer's requirements for measurement, through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/16
CPCG01B21/16
Inventor 季阳熙张丽刘少辉宁成久赵瑞静李占永
Owner CHINA FIRST AUTOMOBILE
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