The five-axis machining center is the abbreviation of the five-axis linkage CNC machine tool machining center. This equipment is a machine tool with at least five coordinate axes, which are processed in coordinated motion under the control of the computer numerical control system. Five-axis linkage is a special term for CNC machine tools.
The so-called linkage means that the axes of the machine tool reach a certain set point at the same time at a certain speed, while five-axis linkage means that all five axes can be used. This machine tool is a high-tech and high-precision equipment.
Today we will mainly talk about the processing methods of five-axis machining centers. There are three processing methods, namely point contact, surface contact and line contact.
(1) Point contact The so-called point contact processing refers to the processing method that is formed by point contact during the processing process, such as spherical milling processing, spherical grinding wheel grinding, etc. The main features of this processing method are: the spherical surface method points to the whole space, and it has the ability to adapt to the curved surface method during processing. Compared with the line and surface contact processing, its programming is relatively simple , the amount of calculation is small, and the interference can be avoided as long as the tool radius is smaller than the minimum curvature radius of the surface. Therefore it is suitable for processing any curved surface. However, due to the point contact forming, the cutting speed at the cutting point approaches zero, so the cutting conditions are poor, and the machining accuracy and efficiency are low.
(2) Surface contact The so-called surface contact processing refers to the processing method of surface contact forming, such as end milling (grinding) processing. The main features of this processing method are: due to the high cutting speed and large cycle feed at the cutting point, it has high processing efficiency and precision. However, due to the influence of the molding method and the shape of the tool, it is mainly suitable for the processing of curved surfaces with relatively flat convex curvature changes.
(3) The focus of current and future research on line-contact five-coordinate linkage CNC machining. Shape hole cutting, belt grinding, etc. The characteristics of this processing method are: due to the high cutting speed at the cutting point, high processing accuracy can be obtained. At the same time, due to the line contact forming, it has high processing efficiency and has been developed. to research on line-contact machining of arbitrary surfaces. The use of five-axis linkage machine tools makes it easier to clamp workpieces. There is no need for special fixtures during processing, which reduces the cost of fixtures, avoids multiple clamping, and improves the precision of mold processing. Using five-axis technology to process molds can reduce the number of fixtures used. In addition, since the five-axis linkage machine tool can save many special tools during processing, the tool cost is reduced. The five-axis linkage machine tool can increase the effective cutting edge length of the tool during processing, reduce the cutting force, improve the service life of the tool, and reduce the cost. The use of five-axis linkage machine tools to process molds can quickly complete mold processing, fast delivery, better guarantee the processing quality of molds, make mold processing easier, and make mold modification easier. In traditional mold processing, vertical machining centers are generally used to complete the milling of workpieces.
(4) With the continuous development of mold manufacturing technology, some weaknesses of the vertical machining center itself are becoming more and more obvious. Ball end milling is commonly used in modern mold processing. The benefits of ball end milling in mold processing are obvious, but if a vertical machining center is used, the linear speed of the bottom surface is zero. , so that the finish of the bottom surface is very poor. If the mold is processed by four- and five-axis linkage machine tool processing technology, the above shortcomings can be overcome.
Shenzhen Xinsheng Precision Hardware Machinery Co., Ltd.We are a professional manufacturer of precision parts and services, specializing in CNC turning, milling and grinding services.
We manufacture and produce non-standard parts, custom machined parts, shaft parts, special shaped parts and other components mainly according to the drawings and documents provided by customers.
Post time: Feb-28-2023
