A tangential self-excited vibration assisted dry grinding system and method

Abstract

The invention discloses a tangential self-excited vibration auxiliary dry grinding system and method. A grinding head system is mounted on a self-excited vibration plate. The self-excited vibration plate is fixed to a machine tool body through a cantilever. During machining, a grinding wheel of the grinding head system rotates to serve as an excitation source of the whole system, energy is input to the self-excited vibration plate, and the self-excited vibration plate drives the grinding head system to subjected to self-excited vibration, so that abrasive grains of the grinding wheel are made to make reciprocating componential movement at a certain frequency in the tangential direction of the grinding wheel relative to a workpiece while grinding the workpiece. By controlling the rotating speed of the grinding wheel, the quantity of input self-excited vibration energy can be adjusted; by analyzing and designing the inherent frequency and modal of the self-excited vibration plate, the frequency of a self-excited vibration system can be controlled; and the abrasive grains of the grinding wheel make contact with or are separated from the workpiece periodically, so that grinding heat is effectively dissipated, and the purposes of decreasing the grinding temperature and avoiding grinding burns are achieved.

Description

technical field [0001] The invention relates to a grinding processing method, which uses the self-excited vibration of a processing system to reduce the grinding temperature in the dry grinding process, avoids grinding burns of workpieces, and reduces grinding wheel wear. Background technique [0002] Grinding is a precision machining method that takes into account both efficiency and quality, but it has the disadvantages of high grinding force, high grinding temperature, and easy burns of workpieces and grinding wheels. In general grinding, it is necessary to pour a large amount of coolant to cool and lubricate the grinding area, so as to reduce the grinding temperature and reduce the grinding force, so as to avoid grinding burns. Grinding fluids mostly contain chemical additives, and the large amount of use, especially the later discharge treatment, cannot avoid certain pollution to the environment. Moreover, for some special materials (such as quartz glass, KDP crystal, ...

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Problems solved by technology

[0004] However, this technique requires fixing the workpiece to the ultrasonic vibrating system

The structure of the ultrasonic vibration system is relatively complicated, and the corresponding ultrasonic vibration system needs to be replaced for parts of different quality, which has poor versatility, high manufacturing cost and high energy consumption

For ultra-precision machining machine tools, the structure design is compact and the rigidity of the machine tool system is high. An overly complicated ultrasonic vibration device is inconvenient to install, and it will reduce the rigidity of the machining system and affect the machining accuracy.

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