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What we must know about orthopedic parts processing

General operation steps of orthopedic accessories processing

  • (1) Before writing or programming, you should first compile the processing program of the workpiece. If the processing program of the workpiece is longer and more complicated, it is best not to program on the machine tool. Instead, use a programming machine or computer programming to avoid occupying the machine time. , For short programs should also be written on the program list. It's best to try it out after editing to avoid unnecessary waste due to formal processing.
  • (2) Generally, the machine is turned on before the system is turned on when the machine is turned on. In some designs, the two are interlocked, and the machine cannot display information on the CRT without power on. In addition, as soon as the system is turned on, a problem is prone to occur when the program written before is started up and running, which may be potentially dangerous. It's like the car is igniting after it is in gear, which is very dangerous.
  • (3) Back to reference point For machine tools with incremental control systems (using incremental position detection elements), this step must be performed first to establish the movement reference of each coordinate of the machine tool.
  • (4) Adjust the processing program. According to the storage medium of the program (paper tape or magnetic tape, disk), it can be input by paper tape reader, cassette tape machine, programming machine or serial communication. If it is a simple program, the keyboard can be directly used on the CNC control panel. If the program is very simple and only one piece is processed, there is no need to save the program. The MDI method can be used to input and process section by section. In addition, the workpiece origin, tool parameters, offsets, and various compensations used in the program must also be input before processing. Of course, most of us would not be able to process only one workpiece.
  • (5) Editing of the program If the inputted program needs to be modified, it must be edited. In the meantime, the machine must be tentatively set. At this time, place the mode selection switch in the edit position, and use the edit keys to add, delete, and change. For the editing method, see the corresponding manual.
  • (6) The machine is locked, and the program is run. This step is to check the program. If there is an error, it needs to be edited again.
  • (7) Manual incremental movement is adopted for loading the workpiece, aligning and tool setting, and continuous movement or the machine tool is moved by hand crank. Align the starting point to the beginning of the program, and set the tool benchmark.
  • (8) Starting coordinate feed for continuous processing generally uses the program in the memory for processing. This method has a lower failure rate than the program on paper tape. The feed speed during processing can be adjusted by the feedrate override switch. During processing, you can press the feed hold button to pause the feed movement, observe the processing conditions or perform manual measurement. Press the cycle start button again to resume processing. To ensure that the program is correct, it should be rechecked before processing. In the milling process, for the plane curve workpiece, a pencil can be used instead of the cutter to set the contour of the workpiece on the paper, which is more intuitive. If the system has a tool path simulation function, it can be used to check the correctness of the program.
  • (9) Operation display Utilize the various screens of the CRT to display the position of the workbench or tool, the program and the state of the machine tool, so that the operator can monitor the processing conditions.
  • (10) After the program output processing, if it is necessary to save the program, it can be left in the CNC's memory. If the program is too long, the program in the memory can be output to an external device (such as a punching machine) in the punched tape (or Tape, disk, etc.).
  • (11) Generally, the machine tool should be shut down before shutting down the system.

2. Precautions during the processing operation of orthopedic accessories

  • (l) Before starting each time, check whether the lubricating oil in the lubricating oil pump behind the milling machine is sufficient, whether the air compressor is turned on, and whether the mechanical oil used for the cutting fluid is sufficient, etc.
  • (2) When starting up, first turn on the main power supply, then press the start button in the CNC power supply, turn the emergency stop button clockwise, and wait for the milling machine to detect all functions (a row of red indicators on the lower operation panel goes out) , Press the button of the machine tool to reset the milling machine and put it on standby.
  • (3) During manual operation, you must always pay attention. Before moving in the X and Y directions, the Z-axis must be at the tool-raising position. In the process of moving, you can't just watch the change of the coordinate position on the CRT screen, but observe the movement of the tool. After the tool moves in place, look at the CRT screen to make fine adjustments.
  • (4) In the programming process, for beginners, try to use the G00 instruction as little as possible, especially in the X, Y, Z three-axis linkage, you should pay more attention. When emptying the knife, the movement of the Z axis should be carried out separately from the movement of the X and Y axes, that is, raise the knife more and insert less obliquely. Sometimes due to oblique insertion, the tool will hit the workpiece and the tool will be damaged.
  • (5) When using a computer for serial communication, do: first turn on the milling machine, then turn on the computer; turn off the computer first, then turn off the milling machine. Avoid impacting the computer due to the instantaneous change of current when the milling machine is switched on and off.
  • (6) When using the DNC (program transfer between computer and milling machine) function, pay attention to the memory capacity of the milling machine. Generally, the total number of bytes of the program transferred from the computer to the milling machine should be less than 23kB. If the program is relatively long, it must be processed by the computer while transmitting, but the block number must not exceed N9999. If the number of blocks exceeds 10,000, the block number can be cancelled with the help of the program editing function in MASTERCAM.

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