As a skilled operator, only after understanding the requirements of the parts to be processed, the process route, and the characteristics of the machine tool, can the machine tool be manipulated to complete various processing tasks. Therefore, a few key points of operation are sorted out for reference:

◆In order to simplify positioning and installation, each positioning surface of the fixture should have precise coordinate dimensions relative to the machining origin of the CNC machining center.

◆In order to ensure that the installation orientation of the parts is consistent with the direction of the workpiece coordinate system and machine tool coordinate system selected in programming, and directional installation.

◆It can be disassembled in a short time and changed into a fixture suitable for new workpieces. Since the auxiliary time of the CNC machining center has been compressed very short, the loading and unloading of the supporting fixtures cannot take up too much time.

◆The fixture should have as few components as possible and high rigidity.

◆The fixture should be open as much as possible, the spatial position of the clamping element can be lower or lower, and the installation fixture should not interfere with the tool path of the working step.

◆Ensure that the machining content of the workpiece can be completed within the range of the spindle's stroke.

◆For CNC machining centers with interactive worktables, the fixture design must prevent spatial interference between fixtures and machine tools due to the movement of the worktable, lifting, lowering, and rotation.

◆Try to complete all processing contents in one clamping. When it is necessary to replace the clamping point, special attention should be paid not to damage the positioning accuracy due to the replacement of the clamping point, and explain it in the process document if necessary.

◆For the contact between the bottom surface of the fixture and the worktable, the flatness of the bottom surface of the fixture must be within 0.01-0.02mm, and the surface roughness is not greater than Ra3.2μm.

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