Size measurement method for matching relationship of automobile outer panels

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 ...

AI Technical Summary

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

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