![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
The basic components of CNC wire-cutting machines include machining programs, high-frequency power supplies, drive systems, CNC systems, and machine tools. Machining programs can be written manually (such as the early 3B instructions), and are now drawn on a computer (such as CAXA, HL, HF, YH, etc.), and then the machining program is generated. The input of the program can be manually input by the panel of the CNC system (single board machine), or it can be transmitted through the 232 serial port of the computer, or it can be transmitted by the computer USB interface. There are three aspects to consider when purchasing a CNC wire-cutting machine.
First, whether the machine body can meet its own processing requirements, and the quality of the machine tool. (Selection of machine body):
1. Firstly, the machine structure design and the size and weight of the machined parts should be optimally matched. For medium and large load tables, a fully supported machining center structure is used. This design can have sufficient load bearing, stiffness, precision, vibration resistance and precision retention.
2, followed by the mechanical transmission of the feed system to use the ball screw, the ball screw is better than the triangular thread screw and the trapezoidal thread screw, and the diameter of the screw is required to be as large as possible to increase the rigidity.
3, again the guide rail, the worktable motion guide is the key to ensure the accuracy of the worktable, the user should pay great attention to the selection. Firstly, observe the cross-section of the guide rail. Under the same conditions, the thicker the rigidity, the better the rigidity, and the more difficult the deformation is in the process, so as to ensure the highest precision and durability of the machine tool in long-term work. Recently, the common rail structure on the market has the following types: 1 inlaid steel ball type rolling guide; 2 inlaid steel roller type rolling guide; 3 linear rolling guide. The difference between the first type and the second type is on the roller of the guide rail, one is a ball and the other is a roller. The ball is in point contact with the rail surface, and the roller is in line contact with the rail surface, so its wear resistance and bearing capacity are much better than the ball type. The linear slide is a kind of rolling guide, which is made by the steel ball infinite rolling cycle between the slider and the slide rail, so that the load platform can easily move linearly along the slide rail with high precision, and the friction coefficient can be reduced to the conventional one. The sliding guide is 1 / 50, making it easy to achieve μ m-level positioning accuracy. The design of the final unit between the slider and the slide rail enables the linear slide rail to simultaneously withstand loads in all directions, such as up, down, left and right, and the linear slide has smoother and less noisy motion characteristics. It maintains its precision and load carrying capacity much better than ball and roller. At present, the third structure is adopted in the machine tools imported by Sodick Corporation of Japan, Mitsubishi Corporation of Japan, Charmilles of Switzerland, and Reach, so by comparison, the user should consider the third structure when selecting the model.
Second, the CNC system, there are many types of CNC systems, the choice of the right system is the key to the purchase of CNC machine tools. (Optional of CNC system): CNC system is the "brain" of CNC machine tools, which calculates and processes machine control information. According to the principle of numerical control system, it can be divided into two categories: economical numerical control system and standard numerical control system.
1. Economical numerical control system: The economical numerical control system is generally referred to as an open-loop numerical control system. The open-loop numerical control system is an index control system without position detection device. The numerical control system sends out a certain number and frequency of command pulses, and the drive unit performs machine positioning. In the case of the open-loop system affected by external factors, the machine does not move or the action is not in place, but the system has reached the specified position when the machine tool reaches, and the machining accuracy of the machine tool will be greatly reduced. However, due to its simple structure, rapid response, stable and reliable operation, convenient debugging and maintenance, and the price is very low, it is subject to the mutual limitation of the torque frequency characteristics and accuracy of the stepping motor, the feed speed and the torque. Improvement is limited. Therefore, the economical numerical control system is currently used in the CNC fast-moving wire cutting and some economical medium-cut wire cutting machine tools with low speed and precision requirements, and is also widely used in the numerical control transformation of ordinary fast wire cutting machine tools.
2. Precision CNC system: The precision CNC system includes a semi-closed loop CNC system and a full closed loop CNC system. The semi-closed loop numerical control system generally refers to the position signal (photoelectric encoder) of the servo motor of the machine tool fed back to the numerical control system. The system can automatically perform position detection and error comparison, and can compensate part of the error, so the control precision is better than the open loop numerical control system. It should be high, but lower than the full-closed CNC system. The full-closed CNC system not only includes the position feedback of the servo motor of the machine tool, but also the position signal of the position detecting device of the machine table (usually with a grating scale) is fed back to the system to form all position follow-up control. The system is in the process of machining. All position errors are automatically detected and compensated. The machining accuracy of the full-closed CNC system is the highest, but the debugging and maintenance of this system is extremely difficult, and the price of the system is very high, which is only suitable for medium and high-grade CNC machine tools. Because the price of the open-loop control system is much lower than that of the closed-loop control system, when choosing the numerical control system, it is necessary to consider the numerical control system to occupy the price-cost ratio of the whole CNC machine tool, and then according to the configuration of the machine tool and the requirements of the machine tool itself, The low-end machine tool adopts an open-loop control system, and the medium and high-end machine tools adopt a closed-loop control system.
| Previous page | 1 | 2 | Next page |
Cutom Abs Case Tape Measure,The Tape Measure of Your Dreams,Stationery Tape with Your Logo
SHANGQIU STAR TOOLS CO.,LTD , https://www.loadstartape.com