Crankshaft static unbalance measuring device and measuring method thereof

Abstract

The invention discloses a crankshaft static unbalance measuring device and a crankshaft static unbalance measuring method, and relates to a crankshaft measuring device and a crankshaft measuring method. Two supports are fixed on a bottom plate in parallel, two rollers are rotatably mounted at the top of each support, the four rollers are arranged in a rectangular shape at the same height to bear two ends of a crankshaft to be tested, the crankshaft to be tested can rotate by taking the axis of the crankshaft as the center, and a magnetic weight is adsorbed and fixed on the crankshaft to be tested. The method comprises the steps of calculating and manufacturing magnetic weights with corresponding weights, adjusting the crankshaft to be measured to four postures, measuring the direction of static unbalance according to the posture with the fastest rotating speed, adsorbing and fixing the magnetic weights in the direction, opposite to the static unbalance, of the crankshaft to be measured, rotating the crankshaft to the posture with the fastest rotating speed again, if the rotation direction of the crankshaft to be measured is changed, determining that the static unbalance is qualified, otherwise, determining that the static unbalance is unqualified. The device is simple in structure, can rapidly and accurately measure whether the crankshaft static unbalance is qualified, and is suitable for being directly used in a production field.

Description

technical field [0001] The invention relates to a crankshaft measuring device and a measuring method, in particular to a crankshaft static unbalance measuring device and a measuring method thereof, belonging to the technical field of engine component production and detection. Background technique [0002] The crankshaft is the most important part of the engine. It bears the force from the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine. Therefore, the quality of the crankshaft directly affects the performance of the engine. [0003] The measurement of the static unbalance of the crankshaft is an indispensable measurement method in the quality inspection process. At present, there are two methods for measuring the static unbalance of the crankshaft: one is the ordinary static balance frame, and this type of device can only measure the direction of the static unbalance. It is impossible to accurately...

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Problems solved by technology

[0003] The measurement of the static unbalance of the crankshaft is an indispensable measurement method in the quality inspection process. At present, there are two methods for measuring the static unbalance of the crankshaft: one is the ordinary static balance frame, and this type of device can only measure the direction of the static unbalance. It is impossible to accurately judge whether the static unbalance is qualified or not. The second is a device that can measure the size of the static balance based on the principle of leverage, but the general structure is complex and the measurement efficiency is low, so it is not suitable for direct use in the production site.

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