Detection device and method for detecting positional precision of connecting rod side surface and cover base surface

Abstract

The invention discloses a detection device and a detection method for detecting positional precision of a connecting rod side surface and a cover base surface. The detection device comprises a detecting station, a small-end positioning assembly, a large-end positioning assembly, a movable measuring base and a standard block. According to the detection device and the detection method for detectingpositional precision of the connecting rod side surface and the cover base surface, a reference reading of a detection gauge is obtained by means of the standard block, the measuring gauge is installed on the movable measuring base, the movable measuring base enables the measuring gauge to obtain actually measured readings of the detected connecting rod side surface and the detected cover base surface when the measuring gauge moves to a designated position, and a deviation value of the connecting rod side surface and the cover base surface can be obtained through calculating a difference valuebetween the actually measured reading of each position and the reference reading, the operation is simple, rapid detection of positional precision of the connecting rod side surface and the cover base surface is realized, the detection efficiency is improved, the operation difficulty is reduced for the tester, and the outflow of defective products can be prevented.

Description

technical field [0001] The invention relates to a detection tool for auto parts, in particular to a detection device and method for detecting the positional accuracy of a connecting rod side surface and a cover seat surface. Background technique [0002] In car engines, see figure 1 The processing surface of some connecting rods includes the connecting rod cover seat surface D and the two sides C on both sides of the big end. After the processing is completed, it is necessary to detect the distance L1 between the connecting rod cover seat surface D and the center of the small end hole E The distances L2 and L3 from the two sides C to the center of the small end hole E, but when measuring the distance, since the position of the center of the circle cannot be directly determined, the distance measurement needs to be sent to the three-coordinate room for detection, and the three-coordinate detection operation is more complicated and It takes a long time, which leads to a long ...

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Problems solved by technology

[0002] In car engines, see figure 1 The processing surface of some connecting rods includes the connecting rod cover seat surface D and the two sides C on both sides of the big end. After the machining is completed, it is necessary to detect the distance L1 between the connecting rod cover seat surface D and the center of the small end hole E The distances L2 and L3 from the two sides C to the center of the small end hole E, but when measuring the distance, since the position of the center of the circle cannot be directly determined, the distance measurement needs to be sent to the three-coordinate room for detection, and the three-coordinate detection operation is more complicated and It takes a long time, which leads to a long inspection time for the workpiece sent to the three-coordinate room for inspection, which seriously affects the production efficiency. In order to reduce the adverse impact on the production efficiency of the three-coordinate room for inspection, the method of random inspection is currently used, resulting in low frequency of inspection. , when the accuracy of the cover seat surface and side position of some workpieces is not up to standard, it cannot be found in time, and unqualified products are easy to flow out

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