Detection tool and method for detecting square groove of fifth balance block of crankshaft

Abstract

A detection tool and method for detecting a crankshaft fifth balance block square groove are used for detecting the position degree and depth of a crankshaft square groove. The detection tool mainly comprises a square groove depth detection tool, a square groove position degree detection tool, a standard component, a measuring key, a small platform, two sets of roller supporting seats, an angular positioning seat and the like, wherein the square groove depth detection tool is used for detecting a fifth balance block square groove. According to the invention, not only can the location degree of the crankshaft fifth balance block square groove be rapidly detected, but also the depth of the square groove can be detected at the same time only by replacing the dial indicator seat under the condition that other parts are not changed, the detection tool can completely meet the detection requirements of the depth and the location degree of the crankshaft fifth balance block square groove through three-coordinate comparison and MSA analysis, and the detection accuracy of the crankshaft fifth balance block square groove is improved. The crankshaft detection device can realize detection on the edge of a production line, and the time for detecting one crankshaft is less than one minute, so that the detection efficiency is greatly improved, the manufacturing cost is low, the detection is stable and reliable, the consistency is better, the labor intensity of an operator is greatly reduced, the working efficiency is improved, and the product quality is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of automobile parts manufacturing, in particular to a checking tool and method for detecting the square groove of the fifth balance block of a crankshaft. Background technique [0002] The crankshaft processing technology is: fine grinding of the semi-finished crankshaft main journal, connecting rod journal and end faces on both sides, final flaw detection of all surfaces of the crankshaft, machining of threaded holes and pin holes on both ends of the crankshaft, fine grinding of the front end journal of the crankshaft, and fine grinding of the rear end journal of the crankshaft , Milling the square groove of the fifth balance block, etc. Among them, the function of designing the square groove of the fifth balance block is to insert the positioning pin into the square groove when the engine is assembled, to fix the angular position of the crankshaft in the engine, to facilitate the installation of the gear t...

AI Technical Summary

Problems solved by technology

The so-called detection of the position of the square slot of the fifth balance weight is to detect the position error of the measured element (point, line, surface) relative to the reference, and the measured element of the square slot is not an entity, but a symmetrical space on both sides of the square slot The plane must be accurately found when testing; the depth of the square groove refers to the distance from the bottom surface of the square groove to the center line of the crankshaft, and it is impossible to directly make a depth gauge

With the rapid development of the automobile industry, the product design of the crankshaft, which is an important part of the automobile, is also updated very quickly. The current method of detecting the position and depth of the square groove of the crankshaft is to use three-coordinate detection, which cannot meet the needs of mass production. Coordinate detection requires the operator to push the crankshaft to the three-coordinate room with a trolley for inspection. It takes about 30 minutes to detect the depth and position of the square groove of the fifth balance weight of a crankshaft. The detection cycle is slow and it is not suitable for Testing of mass-produced products

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