vmc machining center cnc is a machine used to process metal sheet metal, molds, and shell parts. It can complete various machining processes such as drilling, milling, and boring, but its price is higher, and the processing consumption is much higher than that of traditional manual machine tools. Therefore, the processing center is required to greatly reduce the processing time of a single product. . Therefore, the design of a machining center is deeply related to its processing efficiency and processing quality. So, what are the related matters that need to be paid attention to when designing a machining center? Now, let us take a look together.
1. Higher static and dynamic demeanor
Vertical machining centers are expensive, and the cost of wear and tear during the machining process is much higher than that of traditional machine tools. This requires machine tools to greatly shorten the machining time. There are currently two ways to solve this problem. One is the tool material. The development and reformation of the company has greatly improved the cutting speed and doubled the cutting time; the second is to achieve the effect of rapid tool change and fast clamping through the use of an automatic tool change system. The adoption of these measures has greatly improved production efficiency, enabling the owners of machine tools to obtain good economic benefits.
2. Better static stiffness
For a machining center, the structural rigidity of its various parts such as the bed, table, headstock, guide rail and other parts are closely related to the accuracy of the machine tool, so these factors require the machine tool to have a relatively high static rigidity. In the cutting process, there will be vibrations that cannot be avoided. These vibrations will affect the machining accuracy and surface quality. At the same time, it will also reduce the tool life and have a significant impact on production efficiency. However, machining centers have to work continuously for a long time, and it is impossible to eliminate and reduce vibration through manual intervention and adjustment during processing. Therefore, it is also necessary to improve the dynamic rigidity of the machine tool.
3. Smaller thermal deformation.
When the machine tool is cutting, without exception, heat will be generated. This heat will adversely affect the machine tool, causing various parts of the machine tool to produce different degrees of thermal deformation, and these will affect the accuracy of the processed product. How to reduce the impact of heat reduction on the accuracy of processed products is a problem that has to be considered. At present, we can improve the structure of the machine tool to make the invisible thermal deformation of the machine tool deform in our controllable direction. For example, the vertical column of the horizontal machining center adopts a frame-type double column structure, which is symmetrical, and thermal deformation produces a translational shift in the rising direction of the spindle axis. It can be compensated by coordinate correction to reduce heat generation and separate the heat source from the host as much as possible. .
4. The friction between the moving parts is small and the gap of the transmission system is eliminated
The movement of the working platform of the machine tool takes the pulse equivalent as the smallest unit. When performing tool setting or other slow operations, the worktable is required to respond most accurately to the commands issued by the CNC system, and these are frictions with moving parts. There is a relationship. By using the rolling guide way, the friction between each other can be reduced with the increase of the movement speed under the action of lubricating oil, so as to effectively avoid the phenomenon of low-speed crawling.
5. High life and good accuracy retention
For vertical machining centers, having a perfect lubrication system is a guarantee for the life of the machine tool. Therefore, when selecting machine tool guides, spindle parts, screw rods, etc., more wear-resistant materials should be used to make The machining center can maintain good accuracy for a long time.
6. Humanized design
In order to save the time of clamping and changing tools, machining centers usually adopt multi-tool holders and automatic tool changing devices, so that more problems can be solved by one clamping. Therefore, in the process of clamping and changing the tool, manual intervention is reduced as much as possible, so that the human-computer interaction interface can be cleaner and tidy. The enhancement of the interlocking capability of the machine tool can also effectively reduce the occurrence of accidents. At the same time, the setting of the emergency stop device can effectively avoid the occurrence of accidents, and all operations are concentrated on one panel, which is more conducive to operation.
