Engine connecting rod length, curvature, twist detection device and detection method

Abstract

The invention discloses a device and method to detect length, curvature and torsion of an engine connecting rod, wherein the device comprises a base, two lower reference blocks, a step self-centeringspindle, two upper reference blocks, a symmetric stepped shaft, a dial gauge component and a feeler gauge; the front of the lower portion of the base is provided with two reference terraces in bilateral symmetry; the lower reference blocks are fixed to the two reference terraces of the base respectively; two ends of the step self-centering spindle are arranged on upper end faces of the lower reference blocks respectively; a large head hole of the engine connecting rod sleeves the middle of the step self-centering spindle, and a small head hole of the engine connecting rod sleeves the middle ofthe symmetric stepped shaft; the upper reference blocks are fixed to the upper portion of the base; the dial gauge component has adjustable position and is mounted at the center of the front end faceof the base in lockable manner; the feeler gauge is used for measuring clearances between the symmetric stepped shaft and the front end faces of the upper reference block. The device is low in manufacture cost, good in universality and convenient to use.

Description

technical field [0001] The invention relates to a detection device and detection method for the length, curvature and twist of an engine connecting rod. Background technique [0002] During the working process of the engine, the connecting rod connects the piston and the crankshaft, and transmits the energy generated by fuel combustion to the crankshaft to realize power output. It is one of the most critical moving parts of the engine, and its quality directly affects whether the engine can work normally. . Especially when the length of the connecting rod is wrong or bent or twisted, the reciprocating stroke of the piston and the axis center will deviate, which will cause abnormal matching between the piston and piston ring, piston ring and cylinder liner, etc., and aggravate the wear of the cylinder liner Or cause crankshaft damage, eventually leading to engine failure. [0003] In order to ensure the quality of the connecting rod, it is usually necessary to detect the le...

AI Technical Summary

Problems solved by technology

Especially when the length of the connecting rod is wrong or bent or twisted, the reciprocating stroke of the piston and the axis center will deviate, which will cause abnormal matching between the piston and piston ring, piston ring and cylinder liner, etc., and aggravate the wear of the cylinder liner Or cause crankshaft damage, eventually leading to engine failure

[0003] In order to ensure the quality of the connecting rod, it is usually necessary to detect the length, curvature and twist of the connecting rod during the processing of the connecting rod or the assembly of the engine. The existing technology can only pass the three-coordinate inspection

The three-coordinate can only be detected by simulating the three-dimensional structure of the connecting rod with limited sampling points. There is a certain error between the measurement result and the actual use state, and the three-coordinate needs to be inspected by professional quality inspectors at a constant temperature in a fixed place, and cannot be detected in real time at the production or engine assembly site. , the detection efficiency is low, and the detection cost is very high

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