Features of cutting force database formation for modeling of pendulum grinding of flat surfaces of tools made of R9M4K8 and X12 steels

Abstract

The purpose of the article is to create a database on cutting forces P z , P y to enable the simulation of loads on the tools made of R9M4K8 and X12 steels and on machine-tool parts and components using computer programs. forces additionally allow to simulate thermal phenomena in the grinding zone, which being an adverse factor in abrasive processing reduce the performance of cutting tools and dies. The cutting forces are measured using the Kistler dynamometer system and the output of the obtained information is presented in the computer. Correction factors to the basic model taking into account the idle passes by the width of the processed surface are obtained. It is found out that the increase in the operational allowance when grinding with cubic boron nitride wheels is not accompanied by an increase in cutting forces, which is typical for traditional abrasive wheels (in particular for electrocorundum). The cutting forces at grinding of die steel X12 are greater than those at grinding high-speed steel R9M4K8: P y - by 1.2 times, P z - by 1.36 times. The results obtained will increase the efficiency of using CAE-systems (Computer-aided engineering systems) in mechanical engineering, particularly in grinding. It is confirmed that the increase in the grinding coefficient K gr =P z /P y reflects the improvement in the abrasive wheel operating conditions. In particular, it increases when the wheel comes out of contact with the workpiece from 0.32 to 0.46 at the reverse motion in the same zone from 0.46 to 0.64.