SWING HEAD POSITION ERROR DETECTION AND IDENTIFICATION METHOD FOR CA DOUBLE-SWING-HEAD FIVE-AXIS NUMERICALLY CONTROLLED MACHINE TOOL

摘要

A swing head position error detection and identification method for a CA double-swing-head five-axis numerically controlled machine tool, comprising: step S1: measuring a comprehensive position deviation of a ball center of a ball-probe test arbor (10) for a swing head at different positions by using a detection instrument; step S2: establishing, according to a kinematic model of a CA double-swing-head five-axis machine tool and in combination with the properties of a position error term of the swing head, a mathematical relation between the position deviation of the ball center of the ball-probe test arbor (10) and the position error term; step S3: obtaining nine position error identification results of the swing head by means of an identification process on the basis of the measurement data collected in step S1 and the kinematics error relation in step S2; and step S4: repeating step S1 and step S3, carrying out multiple measurements, and taking an average value of the position error identification results. According to the method, the separation of the comprehensive position deviation value of the swing head of the machine tool can be effectively and quickly completed, and automatic detection and automatic identification can be achieved by compiling a measurement cycle, thereby providing technical support for precise control and quick assessment of machine tool precision.