At the beginning of design, it is necessary to consider some factors, such as structure, vertical or horizontal, power, travel data and transmission mode. These factors directly determine the functions and characteristics of the milling machine.
The mechanical structure is usually considered according to the requirements of the product, such as the bed type or the lifting table. Bed type milling machine is mainly used for processing large workpieces, because the workpiece generally only do X to Y movement, generally milling machine spindle Z movement. This solves the problem that the size of the workpiece is large or the weight of the workpiece affects the machining accuracy and instability in the process of movement. Usually this kind of milling machine spindle power is relatively large, cutting performance is strong, and the spindle can generally rotate around.
Normally, milling machines are required to be flexible and wide in use. In this case, you must consider the lifting table milling machine in the design. Lifting table milling machine is usually divided into two types of vertical and horizontal. These two milling machines are generally X, Y, Z axis direction can move, the work table can consider rotating or not rotating. The difficulties encountered in the design of vertical milling machines are the determination of the distance that the spindle extends. The designer needs to consider the distance that the main shaft extends as long as possible to ensure the stability of the main shaft. Because the distance between the main shaft directly affects the distance of the workpiece Y running.The longer the spindle extends, the poorer the machining stability of the spindle, and the poorer the machining accuracy. Therefore, the principle of combination structure of machine tools is very important, which directly determines whether the development of vertical milling machine is successful. We see that most of the vertical milling machines on the market are usually of one body, and usually the main part of the spindle should have a larger radian, which can solve the stability of the spindle part to the greatest extent.
Another kind of lifting table milling machine is horizontal milling machine, and X6132 is one of the most typical. Its overall dimensions are (2294mm*1770mm*1904mm).
The most important part of horizontal milling machines is the processing performance of horizontal milling parts. First of all, the design height is reduced as much as possible under the premise of guaranteeing machining performance. Thus, the stability of the milling machine is improved in structure. Secondly, the spindle part of this milling machine is also a bright spot. The spindle bore is large (NT50), and the bevel bearing is adopted. The stability and the bearing capacity of this kind of bearing are very good. Then look at the transmission part, in front of the main axle limited space, designed a maximum gear transmission structure.This will not only solve the placement of the transmission part, but also to solve the spindle in the high-speed transmission stability. This is a great credit for the designer.
