Finding the causes of quality problems: To understand the quality control of the machining process of shaft forgings, it is necessary to first understand the causes of quality problems during the mechanical machining process.
Process system error. The main reason is to use approximate methods for machining, such as using forming milling cutters to machine gears. 2) Workpiece clamping error. Errors caused by unsatisfactory positioning methods, misalignment between positioning benchmarks and design benchmarks, etc. 3) The manufacturing and installation errors of fixtures, as well as errors caused by fixture wear and tear. 4) Machine tool error. There are also certain errors in various aspects of the machine tool system, which can affect the machining error of shaft forgings. 5) Errors in tool manufacturing and errors caused by tool wear after use. 6) Workpiece error. The positioning fracture of shaft forgings itself has tolerances such as shape, position, and size. 7) The error caused by the deformation of the workpiece during the machining process of shaft forgings due to the influence of force, heat, etc. 8) Measurement error. Errors caused by the influence of measuring equipment and techniques. 9) Adjust the error. Errors caused by factors such as measuring debris, machine tools, and human factors when adjusting the correct relative positions of cutting tools and shaft forgings.
There are two main methods to improve machining accuracy: error prevention and error compensation (error reduction method, error compensation method, error grouping method, error transfer method, on-site machining method, and error averaging method). Error prevention technology: directly reduce the original error. The main method is to directly eliminate or reduce the main original error factors that affect the accuracy of machining shaft forgings after identifying them. Transfer of Original Error: Refers to transferring the original error that affects machining accuracy to a direction that does not affect or minimally affects machining accuracy. Equal distribution of original errors: Using grouping adjustment, the errors are evenly distributed, that is, the workpieces are grouped according to the size of the errors. If divided into n groups, the error of each group of parts is reduced by 1/n.
In summary, the quality problems of shaft forgings can be attributed to factors such as process, clamping, machine tools, cutting tools, workpieces, measurement and adjustment errors, etc. The ways to improve machining accuracy include error prevention and error compensation, which improve accuracy by reducing the original error, transfer error, and averaging error.
Post time: Jan-23-2024
