ЕКСПЕРИМЕНТАЛЬНІ ДОСЛІДЖЕННЯ ШЛІФУВАННЯ ТОРЦІВ РОЛИКІВ ПІДШИПНИКІВ НА МОДЕРНІЗОВАНОМУ ДВОСТОРОННЬОМУ ТОРЦЕШЛІФУВАЛЬНОМУ ВЕРСТАТІ 3342АДО

Abstract

Rolling bearing rollers are very important components of rolling bearings, the end surfaces of which are processed in mass and serial production on two-sided end grinding machines. They must be manufactured in accordance with the require-ments of GOST 25255-82 "Rolling bearings. Rollers cylindrical long. Technical conditions" made of bearing steel ShKh 15 according to GOST 801-78. The end surfaces of the rollers of rolling bearings are subject to high requirements for the accuracy of dimensions, shape and quality of the end surfaces while ensuring high processing productivity. Therefore, it is very important to find new reserves of the process.The analysis of research and publications showed the importance of the thermal effect and rotation of the workpieces in the processing zone during double-sided face grinding on the productivity, accuracy and quality of the processed end surfaces. This becomes even more important when grinding with crossed axes of wheelsand workpieces, since a special profile adjust-ment of the wheel is carried out, which makes it possible to obtain an area for removing the rough allowance and a calibration area on the surface of the wheel. At the same time, the entire allowance is cut inthe area adjacent to the calibration area. The calibration area at the entrance of the parts to the processing area does not participate in cutting the allowance, has high stability and forms the final accuracy of the end surfaces at the exit.The purposeof the article is to conduct experimental studies of the temperature on the ends of the machined bearing rollers along the processing coordinate and the rotation of the machined rollers in the closed zone between two grinding wheels along the processing coordinate on a modernized end-grinding machine 3342 ADO.The work proposed for the first time a new way of adjusting grinding wheels on a two-sided face grinding machine 3342 ADO, which made it possible to obtain a calibration area of grinding wheels of the correct geometric shape (without concavity). For this, the system of straightening of the basic face grinding machine 3342 ADO was modernized, which ensured the syn-chronization of the movements of the product feeding disc with the diamond pencil located on it for straightening the calibration area and the movement along the axis of the headstock of the rotating grinding wheel. All movements were controlled by the CNC system with a specially developed control program.