Large CNC machining center has complex processing, many processes and high requirements. It needs many types of ordinary machine tools and many tool fixtures, and it also needs many times of clamping and adjustment to complete the processing. It needs a combination of many parts. Then this article focuses on introducing the classification of parts in the processing of large CNC machining center, hoping to be helpful to you.
The main processing objects include box parts, complex curved surfaces, special-shaped parts, disc sleeve plate parts and special processing.
Box parts generally refer to parts with more than one hole system, internal cavity and a certain proportion in the direction of length, width and height. Such parts are widely used in machine tool, automobile, aircraft manufacturing and other industries. Box parts generally need multi station hole system and plane processing, with high tolerance requirements, especially strict requirements for form and position tolerance. They usually go through milling, drilling, expanding, boring, reaming, spot facing, tapping and other processes, which requires more tools. It is difficult to process on ordinary machine tools, with many sets of tooling, high cost, long processing cycle, and need to be clamped and aligned for many times, There are many times of manual measurement, and the cutting tools must be changed frequently during processing. It is difficult to formulate the process and, more importantly, it is difficult to ensure the accuracy.
The CNC machining center for processing box parts, when there are many machining stations and the parts can only be completed by multiple rotation angles of the worktable, the horizontal boring and milling machining center is generally selected. When there are few processing stations and the span is small, the vertical machining center can be selected to process from one end.
Complex surfaces play an important role in mechanical manufacturing, especially in aerospace industry. It is difficult or even impossible to complete complex surfaces by ordinary machining methods. In China, the traditional method is precision casting, which can be imagined that its precision is low. Complex curved surface parts, such as various impellers, wind guide wheels, spherical surfaces, various curved surface forming molds, propellers and thrusters of underwater vehicles, and some free-form surfaces of other shapes. Such parts can be processed by machining center. Typical are as follows:
As the basic component of mechanical information storage and transmission, it is widely used in various automatic machines. Such parts include various curved disc cams, cylindrical cams, conical cams, barrel cams, end face cams and so on. For machining such parts, three-axis, four-axis linkage or five axis linkage machining center can be selected according to the complexity of cam.
Such parts are commonly used in compressors of aeroengines, expanders of oxygen production equipment, single screw air compressors, etc. for such profiles, machining centers with more than four axes can be used.
Such as injection mold, rubber mold, vacuum forming blister mold, refrigerator foam mold, pressure casting mold, precision casting mold, etc. The machining center is used to process the mold. Due to the high concentration of processes, the finishing of key parts such as moving mold and static mold is basically to complete all machining contents in one installation, which can reduce the cumulative size error and reduce the repair workload. At the same time, the mold has strong reproducibility and good interchangeability. The amount of work remaining to the fitter in machining is less. Where the tool can reach, it shall be completed by machining as far as possible, so that the workload of the die fitter mainly lies in polishing.
Another problem is that after being familiar with and mastering the processing procedures of large CNC machining center, operators can still process many things, such as some special process manufacturing, such as engraving on metal surface, and so on. The process operation in CNC machining center is OK and very convenient.