Main processing points of horizontal machining center
1. Ensure that the processing of the workpiece is completed within the stroke range of the spindle.
2. Try to complete all processing contents in one clamping. When you have to change the clamping point, pay special attention not to damage the positioning accuracy due to the replacement of the clamping point, if necessary, explain it in the process file. The contact between the bottom surface of the fixture and the table, the flatness of the bottom surface of the fixture must be within 0.01-0.02mm, and the surface roughness is not greater than Ra3.2um.
3. The fixture should have as few components as possible and high rigidity.
4. In order to simplify the positioning and installation, each positioning surface of the fixture should have precise coordinate dimensions relative to the origin of processing.
5. For a machining center with an interactive workbench, the fixture design must prevent space interference between the fixture and the machine tool due to the movement of the workbench, upswing, downswing and rotation.
6, the fixture should be as open as possible, the spatial position of the clamping element can be low to low, the installation fixture can not interfere with the tool path of the step.
7. After a short time of disassembly, it can be changed into a fixture suitable for new workpieces. Since the auxiliary time of the machining center has been compressed short, the loading and unloading of the supporting fixtures cannot take up too much time.
8. In order to ensure that the installation orientation of the part is consistent with the direction of the workpiece coordinate system and machine tool coordinate system selected during programming, and directional installation.
Working principle of horizontal machining center:
After the workpiece is clamped once in the machining center, the digital control system can control the machine tool to automatically select and change tools according to different processing procedures, and automatically change the spindle speed, feed speed, tool trajectory of the tool relative to the workpiece, and other auxiliary functions. Complete multiple processes on multiple faces of the workpiece. And there are a variety of tool change or tool selection functions, which greatly improves production efficiency.
Due to the concentration of procedures and automatic tool change, the machining center reduces the time for workpiece clamping, measurement, and machine tool adjustment, so that the cutting time of the machine tool reaches about 80% of the machine's operating time (compared to 15-20% for ordinary machine tools); It also reduces the workpiece turnover, handling and storage time between processes, shortens the production cycle, and has obvious economic effects. The machining center is suitable for small and medium batch production with complex parts shapes, high precision requirements and frequent product replacement.
Compared with the vertical machining center, the horizontal machining center has a complicated structure, a large floor area, and a high price. Moreover, the horizontal machining center is inconvenient to observe during processing, and it is inconvenient to clamp and measure parts. Easy and good for processing.
