CNC Knowledge: Five -axis longmen machine, you will not regret the selection!

Classification of five -axis treatment machinesThe machine with five axes can be divided into three structures depending on the structure shape: cradle, unique header + a single rotor and double swing header.
In general, the diameter of the treatment of the part of the machine at five cradle -type axes does not exceed 800 mm, and the quality (including the workflow) does not exceed 500 kg. And the quality of the part and the treatment of treatment in the maximum position of axis A are too overloaded.

For the structure of the table at a time, the diameter and quality of the part of the part can be increased under the maximum conditions of the transfer platform, but for the moment, it must still calculate if the rotation of The room is overloaded.

Although the five-axis five-axis machine tool, although the room does not turn, the size and quality of the room can be excellent, but it is always necessary to determine if the inertia of each line can respond to the overall response performance of the machine, and if the torque of the AC axis can respond to the main axis.In addition to the difference between the size and quality of the part, the main axis method is also an important difference.

Here is a technique for selecting the larger double axis dragon doors and various factors to consider in machine tools with two largest axes.

1. The main structure

When the five-axis machine tools works, the quality of the part is a key parameter, which has not only a direct impact on the servo axis of the loading quality, but also has a decisive effect on speed, the Acceleration, inertia, and response performance of the focal part axis.

For large parts, the highest quality not only affects the speed and efficiency of the tool-machine, but also affects surface roughness and the precision of the five-axis tool. Therefore, when choosing a Dragon Porte Machine with a double swing head, the structure of the Dragon Dragon Porte de bundle is generally selected. At the same time, compared to the long-term load of mobile machine tools of the Ouchette, it will inevitably lead to the acceleration of the wear of the rails and the precision decreases rapidly. The Dragon Dragon Porte Structure of Beam, because the quality load is a fixed value, as long as the appropriate guidance rail is selected during design, the machine can be precise for a long time. Of course, as the main structure of the five-axis Dragon Door Machine Machine, the following advantages are key points.

1. Rapid movement speed and acceleration: the Mobile Dragon Mobile Machine De Workbench can generally reach the design speed of its label when loading, but as the quality of the part increases, its movement speed will inevitably decrease significant way. Since the part of the Ouchette has nothing to do with the movement of the part, whatever the transport of several parts, it can guarantee that the design speed can be maintained, which is very significant on the largest machine tool.

When users pay attention to fast speed, they often ignore acceleration. In fact, the impact of rapid mobulation speed on treatment efficiency is much less influenced by acceleration. Since the Ouchette of the Workbench worker is a variable, once the setting is configured, the machine-tool vibrates, impact, etc. To damage the transmission system after being placed. High, and the high acceleration is subject to large-scale overtime, causing damage to the tool-machine, and it is not advisable to define excessive acceleration. Get high acceleration, and even near the vertical treatment center. This can not only improve treatment efficiency, but also improve the quality of the treatment surface.

2. The impact of the structure on the accuracy of the treatment and the roughness of the surface: due to the heavyweight of the workbench of the machine-dragon door tool of the workbench, it is necessary to use a Servomotor plus a planetary reducer to reduce the driving force. When the work is not heavy or the speed of movement is not rapid, the gap between the planetary reducer can generally be compensated by the system, but the machine with long men is generally large and that the work of work He himself is relatively heavy. The opposite is high, it is largely inertia. For the mobile dragon door of the beam, bilateral discs are used and institutions with gaps cannot be used.

Due to the use of speed rack transmission, speed rack and reducer structure have gaps in the use of gear offsets. The motor bands are used on each side of the beam. At the same time, the two groups on both sides must also maintain synchronization. Due to the transmission of deviations from the Dragon Dragon Beam Dragon Dragon Machine, it is considerably avoided, in particular after improving acceleration, it can always maintain high treatment accuracy.

Since there is no gap, there is no cutting phenomenon and acceleration can be improved. factory.Currently, the values ​​of the parameters of key electrical appliances such as gains can be adjusted, and the performance of the machine-tool electrical devices can be improved and the quality of the high surface is obtained.

Second, electrical accuracy and response performance

When choosing a machine tool, ordinary machines buyers generally pay attention to the geometric precision of the tool-tool. The structure of the long -term beam type machine has the characteristics of the quality of the constant movement, it therefore has an advantage of congenital stability in electrical performance.

The quality of the exercise has an essential impact on the ratio and acceleration of the Servo inertia. Servomotor also changes, but for the moment, the user cannot generally adjust these parameters, which directly leads to a reduction in electrical accuracy. At present, high precision refers to the precision of the punctual movement, nor to geometric precision, but to the synchronization of the precision of interpolation of the interpolation of the different direction. This is the problem where the precision of the customer’s part is qualified, but the problem of serious changes in precision after having put larger parts. Since the quality of the movement component is a constant value, the part does not affect the performance of the servo of each axis independently of gravity, it therefore has a high advantage in the stability and consistency of the electrical parameters.

When the angle of swing from the head to five axes with two axes linked to five axes of the machine-tool of the dragon door, the linear axis of the tool-tool must follow the predetermined position, called RTCP function. If the high precision CNC machine is required, the axis response must be consistent. Consequently, each axis must have good servo characteristics and inertia correspondence, then it must control the quality of stable movement, in order to ensure the characteristics and to check it through the circle.

RTCP, in the CNC system with five high axes, believes that RTCP is the central point of the turned tool, which we often call the tip of the tip of the knife. In the five -axis treatment, when continuing the tip of the tip of the knife and the posture between the tool and the part, the additional movement of the tip of the knife is generated due to the rotation movement. The control point of the CNC system often does not overlap with the tip of the knife. The industry also calls for this technology such as TCPM, TCPC or RPCP and other functions. In fact, the functional definitions of these titles are similar to RTCP. Similar to the RPCP function, it is mainly applied to a double rotor machine tool, compensating for the modifications of the coordinate of the right axis caused by the rotation of the part. In fact, these functions are the same to keep the real contact points of the central point of the tool and the surface of the tool and the surface of the room.

Consequently, among the three structures of the long -term machine, the temporary drainage machine of the workbench is generally not high precision and high surface quality;The Dragon Gate Mobile Machine will produce a reversal torque when the speed is acute, which means that the structure does not react quickly, otherwise the accuracy will change and reduce precision.Consequently, these two structures are not suitable for high -precision treatment requirements for five procedures for large parts;The mobile bundle structure is very suitable for high -speed treatment and high provision due to the controllable quality of the movement and no reversed torque. commonly used internationally.

Thus, in order to determine if the electrical accuracy meets the requirements of high -level machines, the author recommends using two or two circles of various linear axes (the five axis systems are supported, can be seen on places). Used in the circle is F4,000,000 mm / min (near the speed of use), the diameter of the round is 50 mm, the more you can see the smaller response performance. The error values ​​at 0.01 mm can be reached under the complete closed ring. For room processing tests, select the surface holes of the diagonal cone on the basis of NAS parts.

How to choose the five -axis head?

As the most critical part of the five-axis machine, the choice of the five-axis header is also very important. First, the part to be treated by the tool-machine must be selected. For the treatment of aluminum materials, the couple in the spindle can generally reach 30 n · m, the power is 20 to 35 kW, the main axis is in HSK A63 and the maximum speed is 18000r / min. For difficult treatment materials such as titanium alloy, such as the main axis is the main axis, it is recommended that the spindle torque is at least 300 ～ 500 n · m to respond to the general cut of the average balance. And the maximum speed is 8000r / min at the moment. If the quantity of cut is large, it is recommended to choose a mechanical pin and the torque can reach 1,000 n · m, which can meet certain heavy cutting requirements, but the speed generally does not exceed 3000r / min. The treatment of high mussels, in particular plastic mold, is generally based on precision treatment. Precision and surface roughness are almost harsh.

Composite materials must depend on specific materials, but the general torque of the spindle must be more than 20 n · m, and the power is 15 kW.

From the point of view of the AC rotation axis, it must generally be driven by the engine. Of course, once the couple in the spindle is 500 n · m ~ 1,000 n · m, the AC axis also uses mechanical types. with low speed requirements.

There are two consumer forms in the form of the five -axis head, one is the type with two arms, and the other is a single arm type. Axis a. For example, if the couple of the single arm also meets the application requirements, interference in the size of the treatment must be taken into account, in particular for treatment of the inner cavity, often interference in the formation of weapons , which leads to the extension of the tool. During certain special parts, the size of the main tree center with the main axis is very small, which can be satisfied with narrow size, and when the C axis runs at 180 °, it can be treated on the edge stenosis. , the actual treatment range is greater than the two arms forces users on which to concentrate. However, in the event of a heavy cut, particularly difficult to treat, it is always recommended to choose the arms. If the arms are not mobilized, you should try to avoid the choice as much as possible. When you choose a five -arms bilateral head with five arms, pay attention to the double engine synchronization control.

Many users want to have a full function when choosing a five -axis machine. and affects use. For the moment, it is necessary to be objective of the real processing process as possible and to choose rationally.

Based on the past experience, on the basis of the selection of the five-axis header that responds to the treatment of molds, aluminum parts can also be processed and general steel parts with coarse precision in Treatment can be processed. When choosing a five -axis user, some aerospace users expect to treat both titanium alloy products and aluminum, but it is likely that titanium alloy treatment is insufficient in rigidity and insufficient couple.

Fourth, the choice of other components of the machine tool

You must also pay attention to the choice of certain main components when purchasing a long -term dual focal point machine. Currently, the driver of a linear engine appears on the market. If there is still a screwdriver, it can lead to the correspondence of the acceleration, if not the weakest always moves and cannot play a role. At the same time, you must also pay attention to the energy consumption of the linear engine. Rotor magnetic force, which increases the corresponding energy consumption.

The network rule is an essential functional component of the five -axis hairdressing machine. Get good outline precision and surface roughness, count on the correspondence of electrical parameters such as the speed cycle and the current ring, as well as the right circular effect of complete loop.

The laser -To -Kife instrument is also a functional part which is recommended to choose. It is not recommended to use a normal knife handle. The main tree bearings.

Of course, many problems must be paid to the attention of the Dragon Porte Machine at five axes. It should be noted that it is necessary to design reasonable and beings (certain terrains in the south also recommend batteries) and sufficient maintenance; Therefore, it is recommended that users choose rationally and can communicate fully technically.

Imported sales center at five axes, tel: 135 2207 9385

5. Summary

In summary, high -speed grinding and long -term machines linked to five double axis areas are mainly used in the dominant current of industry in industry. Global Machinery specializes in the production of different types of Dragon Gate-Style style machine tools. It has been successfully applied to many industries such as precision molds, aerospace and other industries, and has become an important partner for customers in many large mold companies, aerospace and other areas.