Yearly Archive September 22, 2020

Can vertical high speed machining center be equipped with five axes

A: Yes, the structure of vertical high-speed machining center is basically the same as that of conventional high-speed machining center, but there are some differences in processing efficiency, surface quality and processing accuracy. Other structures are basically the same. Therefore, vertical high-speed machining center can also be equipped with five axes, which I can also call five axis high-speed machining center. Can be configured with a, C rotation axis or B, C rotation axis, its rotation axis can be installed on the work and spindle according to the needs of processing products or molds. Some five axis high machining center a, C rotation axis is installed on the worktable, some a, C rotation axis is installed on the spindle, and so on, there are many installation methods, which are mainly determined according to the processed products or molds.

Which brand of five axis vertical high speed processing center is good

There are many brands of five axis vertical high-speed machining centers, which can be roughly divided into domestic and foreign five axis high-speed machining centers. There are many brands of domestic five axis high-speed machining centers, but they are not competitive in the international CNC machine tool market. Domestic five axis high-speed machining centers are generally competitive in the domestic low-end CNC machine tool market, and the domestic high-end CNC machine tool market It has been monopolized by foreign 5-axis high-speed machining center. In the high-end market of domestic CNC machine tools, domestic CNC machine tools are not competitive at all. Therefore, which brand of five axis high-speed machining center is better than the five axis high-speed machining center of foreign brands. For example, German alzmetall, demage and Swiss mikro brands are all at the international first-line level. But these five axis high-speed machining centers of international famous brands are very expensive, which are not affordable for small enterprises.

Linear motor used in machining center is not a new thing in foreign countries, but it is new in China. First of all, let me introduce the linear motor. At present, most of the CNC machine tools use servo motor and rolling screw to drive the linear coordinate axis. The appearance of linear motor has changed completely. Linear motor can directly replace servo motor and rolling screw to drive linear coordinate axis. The linear motor drives the coordinate axis for linear motion, which does not need to change the rotary motion into linear motion like the servo motor and rolling screw. The linear motor directly saves these tedious conversion steps.

Servo motor and linear motor of rolling screw

Characteristics of linear axis driven by linear motor

Linear motor driving linear coordinate axis is characterized by high speed, high efficiency and excellent rigidity, but there are still some problems with linear motor, such as high price, high heat output, poor transmission stability and so on. At present, CNC machine tools still use servo motor and rolling screw to drive linear coordinate axis, and servo motor and rolling screw drive linear coordinate together Axis is still the mainstream of the market.

Which machining centers use linear motors

Although there are many problems in using linear motor to drive linear coordinate axis, there are still some machining centers. For example, high-speed machining center boldly adopts linear motor to drive linear coordinate axis, and high-speed machining center adopts linear motor to drive linear coordinate axis, which is relatively common in foreign countries and less in China, because domestic linear motor technology is not very mature, so it is generally used The manufacturers dare not boldly adopt this kind of practice. However, foreign manufacturers of machining centers are different. In pursuit of processing efficiency, they boldly adopt linear motor to drive linear coordinate axis. For example, dmc75v linear high-speed machining center of German demage company adopts linear motor to drive linear coordinate axis, and its axial acceleration reaches 2G and fast stroke speed reaches 90m / min. thus, the speed of linear motor driving linear coordinate axis in high-speed machining center is 2-3 times higher than that of conventional high-speed machining center using servo motor and rolling.

To sum up, only high-speed machining center can drive linear axis by linear motor. At this stage, using linear motor to drive linear coordinate axis is not the mainstream. I believe that in the future, due to the gradual maturity of linear motor technology and the downward trend of price, the linear motor will directly replace the servo motor and rolling screw to drive the linear seat

It is understood that in recent years, five axis machining of curved surface parts has set off a huge wave in the processing industry, which has multiple advantages such as high processing efficiency and good quality. Therefore, nowadays many processing industries attach great importance to the five axis machining technology of curved surface parts with reliable quality. Now, the specific implementation steps of five axis machining of curved surface parts are briefly described

How to implement the five axis machining of curved surface parts?

1. Analyze the surface shape

Five axis machining technology of curved surface parts is a special technology for curved surface parts. By calculating node data and drawing lines of complex surface, the machining of curved surface parts is simplified. The analysis of the surface shape is a very important step to realize the five axis machining technology. According to the model of the curved surface parts, the outline is outlined, and the characteristics of the surface shape need to be analyzed carefully, so as to lay the foundation for the next five axis machining.

1. Size characteristics

According to the feedback from many users, five axis machining of curved surface parts has great advantages in dealing with irregular parts. Because it can help to analyze the size characteristics of curved surface parts, after determining the shape of the surface and constructing the model, the size of the curved surface part can be determined hierarchically according to the information, and the corresponding processing technology is mastered. Therefore, it is relatively easier to determine whether the appropriate size should be rough machining or fine machining.

1. Determine the processing scheme

The key step of five axis machining technology for curved surface parts is to determine the machining scheme. From the relevant statistical data, five axis machine tool can greatly improve the surface efficiency and production quality of curved surface parts. Of course, the processing quality of this part is also closely related to the processing scheme, and the rough machining scheme and finish machining scheme have a certain impact on the quality of the parts.

Five axis machining technology of curved surface parts has been upgraded and developed with the improvement of technology. Nowadays, we can often see high-quality five axis machining products of curved surface parts in various processing factories. Generally speaking, the specific implementation process of five axis machining of parts is based on the analysis of surface shape, analysis of size characteristics and determination of processing scheme.

Five axis machining center the essence of five axis machining center is a machining center. Two shafts are selected on XYZ axis with two rotating axes. For example, a and B are equipped on X and Y axes, and Z axis can also be equipped with a c axis. The specific selection depends on the specific requirements of customers. Five axis machining center is a machining center with five axes, three spindles and two rotating axes. Most machining centers can be assembled into five axis machining centers.

Pentahedral machining center pentahedral machining center is a special machining center. It has the performance of both vertical machining center and horizontal machining center. The compound milling head is used in this machining center, that is to say, the milling head of pentahedron machining center can be disassembled. Through the milling head, the surface except the contact surface with the workbench can be processed, and the pentahedron plus The machine center can only be gantry machining center, and vertical machining center can not use compound milling head.

The rapid development of five axis machining technology makes many industries marvel. Many people compare the advantages and disadvantages of five axis processing technology and three axis processing technology, and admire those five axis processing manufacturers. According to statistics, five axis machining machine tools are frequently used in many industries. Which industries are more suitable for this five axis machining technology?

Which industries are more suitable for five axis machining technology?

1. High precision medical equipment processing industry

As we all know, high precision medical equipment processing industry has strict requirements for the accuracy of equipment and the use of parameters. The medical equipment produced by the old three-axis machining technology not only has low precision, but also the surface smoothness does not reach the specified standard; while the five axis machining technology is a new technology with high technology content, high precision and focusing on high-precision equipment processing.

1. Aviation industry

According to many users’ feedback, five axis machining technology has been widely used in aviation industry as a representative of high-precision finish machining. Many people know that aviation parts are small and complex, and even some parts require processing in various complex curved surface forms. The five axis CNC machine tool can determine a more reasonable processing scheme according to the size, characteristics and model of curved parts, so as to ensure that the parts have no burr after processing and have high precision and accuracy.

1. Shipbuilding industry

Five axis machining technology is also widely used in shipbuilding industry. Such as ship propeller, ship precision parts and so on. Five axis CNC machine tool has more axes, so it is more flexible to operate. As long as the angle is correct, the machining quality of curved surface parts can be improved. Therefore, although the structure of ship propeller is complex, it can be completed with quality and quantity through five axis machining technology.

Strong five axis machining technology can be applied to the industry is increasing, which also prompted the emergence of a number of five axis processing manufacturers in the market. According to a large number of surveys and statistics, five axis machining is not only suitable for high-precision medical equipment processing industry, aviation industry, shipbuilding industry, but also suitable for construction machinery manufacturing industry, mold manufacturing industry and so on.

Five axis linkage l machining is very common nowadays. Many people in this industry also call it five coordinate machine tool. It adds two rotating axes (which can realize the rotation around X axis and Z axis, namely axis A and axis C) on the basis of three translational axes (linear motion along X, y and Z axes), which can not only make the position of the tool relative to the workpiece arbitrarily controllable, Moreover, the direction of the tool axis relative to the workpiece can also be controlled arbitrarily within a certain range, so that the five coordinate machining tool has the following characteristics:

1. It can avoid tool interference, can process complex parts, and has wide processing adaptability.
2. For ruled surface parts, it can be formed by one knife with good processing quality.
3. It can greatly improve the machining efficiency and surface quality.
4. It is helpful to improve the position accuracy of each surface.
5. The error distribution on the whole part surface can be more uniform.
6. In some machining situations, such as channel machining with limited space or transition area machining of composite surface, larger size tool can be used to avoid interference, and the tool has good rigidity, which is beneficial to improve the machining efficiency and accuracy.

Now the number of industries is increasing, so there are more and more types of machinery used, and now a large number of products will use processing technology, because processing can bring greater benefits to enterprises. In the society, the most widely seen is Dongguan Mechanical processing, and this technology is also the most popular. In Mechanical processing, mold deformation is the easiest, Then, let’s let Xiaobian understand with you what the deformation of the mould is in case of no machining as follows:

1. Appropriate and scientific aging treatment should be carried out for customized materials and hollow materials;
2. In order to process complex structural parts, it is necessary to consider the stress effect between each process and set up a scientific and reasonable process flow;
3. In the processing of POM / PE / PEEK materials, it is necessary to consider the particularity of materials, set appropriate machining allowance, and adopt the principle of “a small number of times” for slow processing;
4. For curved surface machining, it is necessary to design and make appropriate fixture to balance the clamping force on the workpiece to reduce deformation;