As a skilled operator, you must understand the requirements of the machined parts, process lines, machine characteristics before operating the machine to complete various processing tasks. Therefore, to organize a few operating points for reference: 1.
In order to simplify the positioning and installation, each positioning surface of the fixture relative to the processing origin of the CNC machining center, should have precise coordinate dimensions,
To ensure that the installation orientation of the parts and the programmed workpiece coordinate system and the direction of the machine coordinate system consistency and directional installation, can be disassembled in a short period of time, changed to a new workpiece suitable for the fixture. Since the auxiliary time of CNC machining center has been compressed to a very short time, the loading and unloading of supporting fixtures should not take up too much time.
2. The fixture should have as few components and high rigidity as possible.
3. The fixture should be as open as possible, the space position of the clamping element should be as low as possible, and the installation of the fixture should not interfere with the toolpath of the workpiece.
4. Ensure that the machining of the workpiece is completed within the travel range of the spindle.
5. For CNC machining center with interactive table, the fixture design must prevent the spatial interference between the fixture and the machine tool due to the movement of the table, up-rest, down-rest and rotation.
6. Try to complete all machining contents in one clamping. When it is necessary to replace the clamping point, special attention should be paid not to damage the positioning accuracy by replacing the clamping point, if necessary, in the process documentation.
7. The contact between the bottom surface of the fixture and the table, the flatness of the bottom surface of the fixture must be guaranteed to be within 0.01-0.02mm, and the surface roughness should be no greater than ra3.2µm.