这里是标题一h1占位文字
Program features of vertical machining centers
Oct 25,2016
1, with higher static and dynamic flavor. Vertical machining base is expensive, its processing costs than the traditional machine tool to plead more, which begs the need to use methods to significantly tighten the single piece of processing time. Tighten the single piece of machining time including two aspects on the one hand, the development of new tool materials, routine cutting speed exponentially forward, greatly reducing the cutting time; on the other hand, the selection of automatic tool changing system, speed up the clamping change and other operations, which greatly reduces the auxiliary time. These methods have greatly advanced the productivity, obtained good economic benefits, but also significantly increased the load and operating time of the machine tool. In the planning of the processing base structure, taking into account these Therefore, the root of the large parts of the general selection of closed box structure, reasonable placement of reinforcing plate as well as strengthening the contact of the components of the wind, useful to advance the machine's static wind. Other, adjust the quality of components may change the system's self-oscillation frequency, increase the damping can improve the damping characteristics of the machine tool, is a useful way to advance the machine tool dynamic charm.
2, with static stiffness. Machine tool bed, guideway, table, tool holder and spindle box and other components of the structural rigidity will affect his own precision and deformation due to the error occurred. All of these elements require CNC machine tools have a higher static stiffness. Vibration in the cutting process not only directly affects the machining accuracy and surface quality of the parts, but also reduces tool life, affecting productivity. The machining base is a continuous operation, may not be in the processing of artificial adjustment (such as changing the amount of cutting or changing the angle of the tool a few) to eliminate or reduce the vibration, therefore, it is necessary to advance the base of the dynamic stiffness of the machining.
3, there is a smaller thermal deformation. Machining base in processing by the cutting heat, resistance heat and other surface heat sources, the components will occur in different degrees of thermal deformation, which will affect the machining accuracy of the workpiece. Due to the machining base of the spindle speed, feed rate and cutting volume are greater than traditional machine tools, and automation of the technological process, often continuous machining, so the heat generated by the use of more useful liquid cooling, purchase of cold and other methods of controlling the temperature rise; to improve the machine tool structure, so that the thermal deformation of the component occurs in the direction of the non-discrepancy of the active direction. For example, the horizontal machining base of the column selection frame double column structure, dominant symmetry, thermal deformation of the spindle axis of the rising direction of translation, it can be compensated by the coordinate correction is to reduce the heat, as far as possible, the source of heat from the host to be separated from the out.
4, the contact between the moving parts is small and cut the drive system open space. The displacement of the worktable of the machining base takes the pulse equivalent as the smallest unit, and in the case of tool setting, etc., the worktable often moves at a very low speed. This requires the workstation can make accurate response to the instructions announced by the CNC equipment, it is related to the contact characteristics of the moving parts, machining base selection of tumbling guide, tumbling guide and static pressure guide static contact force is small, and in the lubricating oil, their contact force with the advancement of the speed of the movement and reduce, which is useful to avoid low-speed creeping phenomenon, so that the machining base of the balance of the movement and positioning accuracy are Advancement. In the feeding system, the ball screw is used to replace the sliding screw, which is also based on the same reasoning. Other, the use of pulse compensation equipment for pitch compensation, in addition to the feed drive system of the open space, there are also machine tools to choose no open space transmission vice.
5, high longevity, good precision adherence. Outstanding lubrication system ensures the longevity of the vertical machining base, guide rail, feed screw and spindle parts are used in new wear-resistant materials, so that the machining base in the long-term use of the process can adhere to the excellent accuracy.
6、Humanization plan. The machining base adopts spindle, multi-tool holder and automatic tool changer, which saves a lot of time for tool change by finishing multi-process machining in one clamping. Because it does not need manual operation, it chooses closed or semi-closed processing, so that the man-machine interface is bright, clean and harmonized. The machine tool has strong interlocking ability, which can avoid the occurrence of incidents, improve the operator's query, operation and protection conditions, and there is an emergency parking equipment to avoid accidents, all the operations are gathered in an operation and the board, at a glance, reducing the misoperation.
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