Study On The Mechanism Of Grinding Surface Creation And Dynamic Grinding Force Of Large Spiralangle Groove Grinding Wheel

At present,structured grinding wheel is a research hotspot to improve the high-quality grinding surface of high-performance alloys,and grooved grinding wheel with large helix angle(β>85)is a more advantageous grinding wheel structure.However,there are some restrictive factors to realize the grinding process of high-quality alloy surface by using structured grinding wheel,that is,the mechanism of macro-micro morphology of grinding surface is complex,the surface morphology is difficult to control accurately,and the grinding process is complex and changeable.The precision grinding process of structured grinding wheel is a process of producing key parts of high-performance alloy.How to use new technologies and techniques to complete the grinding process with high precision,high efficiency and low cost is the main goal of the research on precision grinding of high-performance alloy materials.Therefore,in order to study the grinding interface of high-quality surface of high-performance alloy key components with large spiral angle groove grinding wheel,the main research methods in this paper are as follows: firstly,by establishing a macro-mathematical model of spiral groove grinding wheel with large spiral angle(β>85),based on grinding kinematics and grinding motion law of grinding wheel,the regular characteristic landform formed by the surface structure law of grinding wheel with large spiral angle groove grinding wheel is studied.The influence of grinding process parameters and grinding wheel process parameters on the characteristic landform is studied,and the empirical formula of the average protruding ridge of the regular characteristic landform is analyzed and deduced to realize the accurate control of the phenomenon of "double reflection effect".Based on the random distribution of abrasive particles on the grinding wheel surface and the collision method of surrounding balls,a simulation model of micro-surface topography of structured grinding wheel is established.Through the dynamic analysis and calculation model of grinding kinematics and grinding force,the changing laws of dynamic undeformed chip cross-sectional area,dynamic normal grinding force and dynamic tangential grinding force at the grinding interface of structured grinding wheel are obtained,and the influence laws between related parameters and them are analyzed.The grinding surface of the workpiece is obtained through grinding experiments,and the surface topography of the ground workpiece surface is observed,so as to verify and analyze the influence law of grinding process parameters and grinding wheel process parameters on the phenomenon of "double reflection effect" and the effectiveness of the empirical formula of average protruding ridge height.The dynamic grinding force of grinding interface of groove grinding wheel with large helix angle is obtained through grinding experiment,and the validity of the model is verified.In summary,this paper has achieved the effective control of the phenomenon of the "complex reflection effect" on the workpiece surface caused by the large spiral groove grinding wheel,effectively promoted the application of the large spiral groove grinding wheel in the precision grinding process,verified the validity of the mathematical calculation model of the dynamic grinding force of the large spiral groove grinding wheel,and contributed to the promotion of the basic theory of the mechanism of the grinding interface of the large spiral groove grinding wheel.It is of great significance to promote the development of the basic theory of the interfacial action mechanism of grinding wheels,to promote the technological progress and industrial upgrading of related fields,and to form the theoretical system and key technology of high quality surface grinding process for high performance alloys.