I. What are the classification of vertical machining centers
1. Classification according to structure:
① Fixed column vertical machining center (C-Type) : that is, the table movement, column fixed structure, also known as the table movement vertical machining center, belongs to the traditional popular vertical machining center, the vertical machining center cost is low, the design and manufacturing is relatively easy, can achieve mass production, performance, the column parts of the machine tool, head stock parts rigidity is good, In the cutting process, the head stock component vibration is small.
② Moving column vertical machining center（Moving column type）: that is, the workbench is fixed, column sports structure, also known as fixed desktop vertical machining center, this kind of processing center because the workbench does not move, can place larger workpiece and irregular workpiece, can process a large weight of the workpiece, in addition, the fixed workbench makes the operator easier to close, the operation of the workpiece is easier and labor saving, More convenient operation.
③ Small Gantry Type vertical machining center (Gantry Type): This kind of machining center has good rigidity, high precision, headstock components are not overhang, processing does not bear the deformation caused by bending moment, the frame in the frame structure can do high-speed processing, high-speed positioning.
2. According to the classification of guide rail:
According to the form of each shaft guide rail of vertical machining center, it can be divided into hard rail and line rail. Hard rail is more suitable for heavy cutting, line rail movement is more sensitive, convenient for later maintenance.
3. According to the classification of speed:
Generally speaking, the spindle speed of vertical machining center is 6000-15000rpm, which is a low speed type, and the one above 18000rpn is a high speed type.
II. The characteristics of vertical machining center
1. the workpiece is easy to clamp, available general fixture such as flat pliers, pressing plate, dividing head, rotary table clamping workpiece, workpiece clamping positioning is convenient
2. tool moving track is easy to observe, debugging program inspection and measurement is convenient, can find problems in time, stop processing or modification.
3. easy to establish cooling conditions, cutting fluid can directly reach the tool and machining surface
4. coordinate system, namely three coordinate axes XYZ and Cartesian coordinate system kissing platform, intuitive feeling, consistent with the drawing perspective.
5. the chip is easy to exclude and drop, avoid the chip cutting machining surface.
6. the structure of the general use of single column, compared with the corresponding horizontal machining center, simple structure, small area, low price
7. vertical machining center processing Z axis direction size is relatively small workpiece, in general, in addition to the bottom surface can not be processed, the other five surfaces are available for contour and surface processing with different tools.
