Machine tool main shaft axle journal shaft bushing friction performance test machine

Abstract

The invention relates to a tribological performance testing device of journal and bearing bush of the main shaft of machine tool, and relates to the testing device, in particular to a simulating and testing device in the friction and wear of the journal and bearing bush of the main shaft of machine tool, belonging to the technological field of tribology. The simulating and testing device comprises a driving part, a testing part, a loading part, and a measuring system; the transducer of the driving part is connected with a speed regulating motor; the main shaft of the speed regulating motor is connected with a support shaft through a coupling device; the support shaft is a ladder shaft; the strain beam of the testing part is vertically arranged at the upper end of an upper sample fixture; a bolt is used for locking an upper sample in the square groove at the lower end of the upper sample fixture; an annular lower sample is arranged below the upper sample; the upper end of the strain beam of the loading part is connected with a force exerting lever in the way of interference fit; one end of the force exerting lever is provided with a clump weight and the other end is provided with a weight frame. The testing device can simulate the actual working condition, has a simple structure, can simultaneously estimate the tribological properties of the material of the sliding bearing pair and the lubricating medium, and can realize the accelerated wear test.

Description

technical field [0001] The invention relates to a test device, in particular to a simulation and detection device for the friction and wear process of the spindle journal and bush pair of a machine tool, and belongs to the technical field of tribology. Background technique [0002] Sliding bearing is one of the commonly used support-transmission components. The tribological properties of the sliding bearing pair of the machine tool spindle have a direct impact on the accuracy and life of the machine tool. After more than 10,000 hours of operation for the sliding bearing pair of the machine tool spindle, severe fatigue pitting and tiny cracks appear on the journal surface, resulting in machine tool accuracy, primary wear and service life that are far lower than similar foreign products. The main reason for this phenomenon is that the auxiliary materials, surface engineering and lubricating oil characteristics of the sliding bearing have not been systematically matched, so the...

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Problems solved by technology

However, its structure is relatively complex, and the method of measuring the friction coefficient is insufficient, especially when the friction coefficient of the friction pair is small, the error is large

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