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1. Every time the machine is turned on or reset by pressing the emergency stop, the machine first returns to the machine reference zero position (ie zero return) so that the machine tool has a reference position for its subsequent operations.
2.Clamp the workpiece.
3. Before the workpiece is clamped, the surfaces must be cleaned to avoid oil, iron filings and dust, and use a file (or oil stone) to remove the burrs on the surface of the workpiece.
4. The high-speed rail used for clamping must be smoothed by a grinder to make it smooth and flat. The code iron and nut must be sturdy and can clamp the workpiece reliably. For small workpieces that are difficult to clamp, they can be directly clamped on the vise.
5. The workbench of the machine tool should be clean and free of iron filings, dust, and oil.
6. The shim is generally placed on the four corners of the workpiece, and the equal-height shim must be placed in the middle for the workpiece with too large span.
7. According to the size of the drawing, use a caliper/drawing rule to check whether the length, width and height of the workpiece are qualified.
8. When clamping the workpiece, according to the requirements of the program sheet, consider avoiding the processed parts and the situation where the tool head may touch the fixture during processing.
9. After the workpiece is placed on the shim, it is necessary to pull the reference surface of the workpiece according to the requirements of the drawing. The error in the length direction of the workpiece is less than 0.02mm, and the horizontal error in the X and Y directions of the top surface is less than 0.05mm. For the workpiece that has been ground on all six sides, the verticality of the workpiece must be checked.
10. The nut must be tightened after the workpiece is pulled out to prevent the workpiece from shifting during processing due to the unstable clamping.
11. Pull the meter again to make sure that the error is within tolerance after clamping.
12. Workpiece touch count: For the clamped workpiece, the centering bar can be used to touch count to determine the machining reference zero position. The touch count method has two kinds of middle touch count and unilateral touch count. The steps of dividing middle touch count are as follows:
13. Touch counting method: the spindle speed is 450~600rpm.
14. Manually move the X-axis of the worktable to make the touch head touch one side of the workpiece. When the touch head just touches the workpiece, set it
The relative coordinate value of this point is zero; then manually move the X-axis of the worktable to make the touch sensor touch the other side of the workpiece. When the touch sensor just touches the workpiece, write down the relative coordinates at this time.
15. Subtract the diameter of the bumper (ie the length of the workpiece) according to its relative value, and check whether the length of the workpiece meets the requirements of the drawing.
16. Divide this relative coordinate number by 2, the value obtained is the middle value of the X axis of the workpiece, and then move the worktable to the middle value of the X axis, and set the relative coordinate value of the X axis of this point to zero, this point It is the zero position on the X axis of the workpiece.
17. Carefully record the mechanical coordinate value of the zero position on the X axis of the workpiece in one of G54~G59, and let the machine tool determine the zero position on the X axis of the workpiece. Once again, carefully check the correctness of the data.
18. The steps of workpiece Y-axis zero setting are the same as those of X-axis.
19. Prepare all tools according to the requirements of the program sheet.
20. According to the tool data required by the program sheet, replace the tool to be processed.
21. Move the tool to a safe place, move the tool down manually, and perform the zero position operation of the Z axis.
22. Record the mechanical coordinate Z value of this point in one of G54~G59. This completes the zero setting of the X, Y, and Z axes of the workpiece. Once again, carefully check the correctness of the data.
23. The one-side touch count is to touch one side of the X and Y axis of the workpiece according to the above method, and the relative coordinate value of the X and Y axes of this point is offset. The radius of the touch head is the zero position of the X and Y axes. Mark the mechanical coordinates of a point of X and Y axis in one of G54~G59. Once again, carefully check the correctness of the data.
24. Check the correctness of the zero point, move the X and Y axes to the side of the workpiece, and visually check the correctness of the zero point according to the size of the workpiece.
25. Copy the program file to the computer according to the file path of the program sheet.
