An abrasive flow ultra-precision machining device

Abstract

The invention provides an abrasive particle flow ultra-precision machining device. Injection pressure and speed of abrasive particle flows are adjusted by adjusting threads between a pressure head and an abrasive particle flow injection polishing nozzle, and pressure is provided for a sealed box through a pneumatic cylinder, so that pressure is applied to the pressure head through a pressure plug. According to the abrasive particle flow ultra-precision machining device, the pneumatic cylinder for replacing a spring applies pressure to the pressure head so that accuracy of pressure of the abrasive particle flow injection polishing nozzle to a work-piece can be effectively improved, the abrasive particle flow machining accuracy is improved, and ultra-precision machining is achieved; meanwhile, concentration of abrasive particles in the abrasive particle flows is monitored and controlled in real time, so that machining accuracy and efficiency are guaranteed; Injection pressure and speed of the abrasive particle flows are adjusted by adjusting the threads between the pressure head and the abrasive particle flow injection polishing nozzle, and a pressure-maintaining flow stopping part is arranged at the tail end of the abrasive particle flow injection polishing nozzle so that the machining efficiency can be effectively improved. By means of the abrasive particle flow ultra-precision machining device, both machining efficiency and ultra-precision machining accuracy can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of precision machining, in particular to an abrasive particle flow ultra-precision machining device, which belongs to the technical field of ultra-precision machining. Background technique [0002] In the field of mechanical processing, there are many precision finishing methods in addition to traditional mechanical methods, including ultrasonic polishing, chemical polishing, electrochemical polishing, and electrochemical-mechanical composite processing. Abrasive flow machining is a rapidly developed precision finishing method. One of them has been widely used in the aviation and military industry, textile machinery, steam turbines, molds and hydraulic machinery industries. [0003] Abrasive flow ultra-precision machining technology is a newest machining method. It uses abrasive flow medium (a flowable mixture mixed with abrasive grains) to flow over the surface to be processed by the workpiece under pressur...

AI Technical Summary

Problems solved by technology

[0004] Abrasive flow is a viscous abrasive containing abrasive particles, which is suitable for inner cavity processing, because its non-fixed shape determines the complexity of the processing mechanism. At present, scholars at home and abroad mainly focus on the viscosity, working pressure, abrasive particles and other factors Research on the processing method of abrasive flow has gradually developed some devices that use abrasive flow to perform ultra-precision machining of workpieces. However, the abrasive flow spray head of the current abrasive flow processing device generally uses a spring to give the spray head a certain pressure, but spring pressure is used. Although some pressure sensors are used, the way of applying force is not smooth, and the pressure will be greatly affected by the failure of the spring, which will affect the machining accuracy of the workpiece, and the nozzle. The pressure of the abrasive flow is only adjusted by the pressure pump, and the adjustment effect is limited, and the end of the abrasive flow spray head lacks a flow blocking device, which reduces the impact of the abrasive flow and lowers the processing efficiency

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