Methods of Investigation of Static and Dynamic Properties of ATPCS of Late Machine Controlled by two Parameters: with Hydraulic Feed System and Cutting Speed Regulation

Modern machine-building industry can be successful only if the production of competitive production is launched well, which characterized by high quality and relatively low cost. High product quality is achieved through the introduction of automatic technological process control systems (ATPCS), especially in those areas of machine-building production in which the manufacture of parts is carried out by metal-cutting machines. As for cost reduction, this indicator is achieved by ensuring high accuracy through the use of advanced conversion and measuring equipment in the main drive and feed drives of metal-cutting machines. In this article there are materials of ATPCS, where for achieving the quality and lower the cost of the detail manufactured on a lathe, an additional cutting speed control system was introduced to the existing tool feed control system. To do this, it was necessary to modernize the main drive of the machine, replace the automatic gearbox with a frequency-controlled electric drive, and introduce a contour into the structure of ATPCS, which simultaneously participates in the process of stabilizing the radial cutting force. For this reason, the title of the article contains a formulation on the methods of studying the automatic control system for the technological process of cutting during turning according to two parameters: tool feed and cutting speed. To confirm the achieved goals formulated in the article, research methods were developed, consisting of the following points: determination of stability indicators as a result of the action of controlling or disturbing influences on the system, methods for organizing experiments to remove oscillograms to determine the dynamic properties of ATPCS, methods for establishing accuracy in the manufacture of a batch of parts.