Self-balancing motorized spindle comprehensive performance test platform

Abstract

The invention discloses a self-balancing motorized spindle comprehensive performance test platform. A balancing head is arranged at the front end of a motorized spindle, a non-balancing simulation disc is used for fixing the balancing head and simulating the imbalance of the motorized spindle, an optical fiber sensor is embedded in a stator of the balancing head, an acceleration sensor is installed on a front bearing seat of the motorized spindle, two mutually perpendicular displacement sensors are arranged at a shaft section at the front end of the motorized spindle in the radial direction, temperature sensors are arranged on a motorized spindle shell body and an outer ring of a supporting bearing of the motorized spindle shell body, and a high-precision displacement sensor is arranged at the front end of the motorized spindle in the axial direction. The rotation speed of the spindle, the vibration of the shell body, vibration of a shaft, axis track, the temperature of a motor winding and the bearing, and heat deformation of the shaft are respectively detected, and signals output by each sensor pass a sensor signal integration transducing unit and then are respectively input to a vehicle-mounted unit, a portable signal collection analysis instrument and an electric control cabinet. The self-balancing motorized spindle comprehensive performance test platform realizes the functions of on-line dynamic balancing, automatic alarming, active machine stopping and the like, and has the advantages of being high in integration degree, comprehensive in function, controllable in fault and the like.

Description

technical field [0001] The invention belongs to the technical field of electric spindles, and relates to an electric spindle performance test platform, in particular to a self-balancing electric spindle comprehensive performance test platform. Background technique [0002] Machine tool spindles often have quality eccentricity due to uneven material, manufacturing errors, assembly errors, and tool changes. [0003] When the machine tool spindle rotates at high speed, its mass eccentricity will generate a large inertial centrifugal force, which will cause strong vibration of the spindle system, which will have a negative impact on the service life of the spindle and the surface quality of the workpiece. [0004] Compared with the traditional mechanical spindle, the electric spindle has a speed of hundreds of thousands of revolutions. Therefore, for the electric spindle, the unbalance problem is more prominent. In order to give full play to the efficiency of electric spindle ...

AI Technical Summary

Problems solved by technology

Most of the existing research is independent research on special technologies such as vibration monitoring analysis, online automatic balance, online temperature rise test, thermal deformation test, fault alarm and compensation, and the following problems exist in the existing research: (1) The automatic balancing head used Most of them are mechanical type, liquid spray type and imitation motor type, and the structure is complex; (2) the balance strategy adopted is mostly double-sided balance; (3) when the vibration exceeds the balance range of the automatic balancing head, there is no effective vibration Control measures; (4) For the temperature rise of the electric spindle after the balance head is installed, there is a lack of testing and evaluation of multiple measuring points; (5) Thermal deformation testing is still a problem, and there is a lack of simple and effective measurement solutions; (6) There is a lack of a comprehensive test platform with high integration, good practicability and rich functions for the research on the monitoring and fault control of the electric spindle

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