The five-axis machining center has attracted the attention of the world with its outstanding flexible automation performance, excellent and stable precision, and its agile and diversified functions. It pioneered the development of mechanical products to mechatronics, and the five-axis machining center became advanced. A central technology in production technology. On the other hand, through continuous research, the in-depth use of information technology has rushed into the further promotion of the five-axis machining center.
The five-axis machining center is an important basic equipment for machine tool operations, so its development has always attracted people's attention. In recent years, China's machine tool manufacturing has not only faced the opportunity of the development of production equipment, but also encountered the pressure of market competition.
From a technical point of view, deceleration and promotion of the five-axis machining center will be a crux for the continuous development of machine tool manufacturing. At present, the world's advanced production technology has always declined, the use of ultra-high-speed cutting, ultra-fine processing and other technologies, the agile development of flexible production systems and the integration of computer integration systems have always made higher demands on CNC machining technology. Today's five-axis machining centers are moving in the following directions.
1. Maximize reliability
The reliability of a five-axis machining center has always been an important indicator of most concern to users. The CNC system will adopt a more integrated circuit chip, using a wide range or a wide range of dedicated and hybrid integrated circuits to increase the number of components to improve the reliability.
2. CNC programming automation
At present, CAD/CAM graphic interactive automatic programming has been used more and is a new trend in the development of five-axis machining centers.
The modern five-axis machining center will introduce adaptive control technology, which automatically adjusts the task parameters according to the change of cutting conditions, so that the optimal task condition can be maintained in the processing process, thus obtaining higher processing precision and smaller appearance roughness.
At the same time, it can improve the service life of the tool and the production efficiency of the equipment.
4. Control system miniaturization
The miniaturization of the numerical control system facilitates the integration of the machine and the electric installation. At present, it is important to adopt a large-scale integrated component, a multi-layer printed circuit board, and adopt a three-dimensional installation method to enable high-density installation of electronic components, thereby greatly reducing the occupation space of the system.
All kinds of machining centers equipped with automatic tool changers (tools with a capacity of more than 100) can perform milling, boring, drilling, turning, reaming, reaming, tapping, etc. on the same machine. Process processing,
The modern five-axis machining center also adopts multi-spindle and polyhedral cutting, that is, different methods of cutting different parts of a part at the same time.
6. High speed and high precision
Speed and accuracy are two important indicators of a five-axis machining center, which is indirectly related to machining efficiency and product quality. At present, the numerical control system adopts a processor with a higher number of bits and a higher frequency to improve the basic operation speed of the system.
At the same time, a large range of integrated circuits and multi-microprocessor construction is adopted to improve the data processing capability of the system, that is, to improve the speed and accuracy of the interpolation operation. And adopting a linear motor indirectly driving the linear servo feed method of the machine tool table,
Its high speed and static response characteristics are commensurate with each other. The feedforward control technology is adopted to greatly reduce the tracking hysteresis error, thereby improving the machining accuracy of the corner cutting.
The CNC five-axis machining service can process continuous, smooth free-form surfaces that cannot be machined by conventional CNC three-axis machining services or that are difficult to machine in one setup.
Such as aero-engine and steam turbine blades, aerodynamic propellers for ships, including some special curved surfaces and complex cavities, hole-shaped shells and molds, etc., such as ordinary CNC three-axis machining services, due to the position of its tool relative to the workpiece The attitude angle cannot be changed during the machining process. When processing some complex free-form surfaces, it is possible to produce interference or under-processing (ie, not processing).
When the CNC five-axis machining service is used, since the position angle of the tool/workpiece can be adjusted at any time during the machining process, the interference of the tool workpiece can be avoided and the entire machining can be completed in one clamping;
CNC five-axis machining service can improve the machining accuracy, quality and efficiency of space free-form surfaces. For example, when the CNC three-axis machining service processes complex curved surfaces, ball-end milling cutters are often used. The ball-end milling cutters are formed by point contact, the cutting efficiency is low, and the tool/workpiece position and angle cannot be adjusted during the machining process, which is generally very It is difficult to ensure that the cutting point on the ball end mill (ie, the high speed of the ball head is high) is cut, and it is possible that the cutting point falls on the center line of rotation on which the line speed of the ball head knife is equal to zero. When the CNC five-axis machining service is used, since the tool/workpiece position and angle can be adjusted at any time, it can not only avoid this situation, but also make full use of the good cutting point of the tool for cutting or line contact forming. The spiral end mill replaces the ball-end milling cutter with point contact, and even can be milled by further optimizing the attitude angle of the tool/workpiece to obtain higher cutting speed and cutting line width, which means higher Cutting efficiency and better surface quality.
The advantages of mold processing. In the traditional mold processing, the vertical machining center is generally used to complete the milling of the workpiece. With the continuous development of mold manufacturing technology, some weaknesses of the vertical machining center itself are becoming more and more obvious. Modern mold processing is generally processed by ball-end milling cutters. The benefits of ball-end milling cutters in mold processing are very obvious, but if a vertical machining center is used, the bottom line has zero line speed, so the bottom surface has a poor finish. If you use CNC four-axis machining service and CNC five-axis machining service technology to process the mold, you can overcome the above shortcomings.
Using CNC five-axis machining service to process the mold can complete the mold processing faster, the delivery is fast, and the processing quality of the mold is better guaranteed. The processing and modification of the mold will become easier.