EXPANSION OF TECHNOLOGICAL CAPABILITIES OF DIAGNOSTICS OF FINISHING THREAD GRINDING OPERATIONS

Abstract

When machining lead screws, the accuracy of thread grinding is influenced by random factors, in particular, axial temperature and residual deformations of the machined parts. Therefore, for high-precision thread processing of premium lead screws, in addition to ensuring the accuracy of thread grinding, it is necessary to use a rational finishing grinding technology. The existing methods for increasing the accuracy of finishing grinding can be conditionally divided into methods that allow to eliminate the influence of systematic components of the processing error and methods that allow taking into account the influence of a random component. The paper proposes a method for automated grinding, which makes it possible to take into account the errors of the kinematic chains of the grinding machine. According to this method, a preliminary measurement of machine errors is made, for example, errors of movement of the working bodies of the machine, and then these errors are recorded in the memory of the numerical control system in the form of a spreadsheet, in accordance with the data of which corrective actions are developed, or the error is described functionally, and a mathematical model is fixed in the memory of the system, which reduces the amount of memory occupied. Proactive active control of temperature deformation of precision screws, produced by an automatic system, allows to stabilize temperature deformation at the level of correction setting, and thereby eliminate the random component of the accumulated error of the thread lead.