1. Safety rules for CNC four-axis machining:
1) The safety operation rules of the machining center must be followed.
2) Before work, you should wear protective equipment and tie your cuffs. Scarves, gloves, ties, and aprons are not allowed. Female workers should wear braids in hats.
3) Before starting the machine, check whether the tool compensation, machine zero point, workpiece zero point, etc. are correct.
4) The relative position of each button should meet the operation requirements. Carefully compile and input CNC programs.
5) It is necessary to check the operation status of the protection, insurance, signal, position, mechanical transmission part, electrical, hydraulic, digital display and other systems on the equipment, and cutting can be carried out under normal conditions.
6) The machine tool should be tested before processing, and the operating conditions of lubrication, mechanical, electrical, hydraulic, digital display and other systems should be checked, and cutting can be performed under normal conditions.
7) After the machine tool enters the processing operation according to the program, the operator is not allowed to touch the moving workpiece, cutting tool and transmission part, and it is forbidden to transfer or take tools and other items through the rotating part of the machine tool.
8) When adjusting the machine tool, clamping workpieces and tools, and wiping the machine tool, it must be stopped.
9) Tools or other items are not allowed to be placed on electrical appliances, operation cabinets and protective covers.
10) It is not allowed to remove iron filings directly by hand, and special tools should be used for cleaning.
11) If abnormal conditions and alarm signals are found, stop immediately and ask relevant personnel to check.
12) It is not allowed to leave the work position when the machine tool is running. When leaving for any reason, put the worktable in the middle position, and the tool bar should be retracted. It must be stopped and the power supply of the host machine should be cut off.
Second, the operation points of CNC four-axis machining:
1) 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 machining center.
2) 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 the programming, and directional installation.
3) It can be disassembled in a short time and changed into a fixture suitable for new workpieces. Since the auxiliary time of the machining center has been compressed very short, the loading and unloading of the supporting fixtures cannot take up too much time.
4) The fixture should have as few components as possible and high stiffness.
5) The fixture should be opened 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.
6) Ensure that the machining content of the workpiece is completed within the travel range of the spindle.
7) For a machining center with an interactive worktable, the fixture design must prevent spatial interference between the fixture and the machine due to the movement of the worktable, lifting, lowering, and rotation.
8) Try to complete all the processing content 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.
9) 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 Ra3.2um.
Post time: Mar-16-2022