1. Start preparation
After the machine tool is turned on or emergency stop reset is pressed, the machine tool first returns to the reference zero position (i.e., return to zero) so that the machine tool can provide a reference position for subsequent operations.
2. Clamping of workpieces
Before clamping the workpiece, the surface must be cleaned to avoid oil, iron filings and dust, and burrs on the surface of the workpiece must be removed with a file (or whetstone).
The high-speed iron used for clamping must be polished with a grinder to make it smooth and flat. The code iron and nut must be strong and can reliably clamp the workpiece. For small workpieces that are difficult to clamp, they can be clamped directly on the tiger; the machine tool workbench should be clean and free of iron filings, dust, and oil; pad irons are generally placed at the four corners of the workpiece. For workpieces with too large spans, they need to be Add a contour spacer in the middle.
According to the drawing size, use the drawing ruler to check whether the length, width and height of the workpiece are qualified.
When clamping the workpiece, follow the clamping and placement methods in the programming operation guide, and consider avoiding situations where the parts to be processed and the tool head may contact the fixture during processing.
After the workpiece is placed on the horn, the datum plane of the workpiece needs to be pulled according to the drawing requirements to check whether the six sides of the workpiece have been polished for verticality.
After the workpiece is pulled out, the nut must be tightened to prevent the workpiece from shifting due to unstable clamping during processing; after clamping, pull the workbench again to ensure that the error does not exceed the tolerance.
3. Workpiece impact
The clamped workpiece can use a touch digital head to set the reference zero position for processing. The digital head can be photoelectric or mechanical. There are two methods: midpoint collision and unilateral collision. The steps for split center collision are as follows:
Photoelectric static, mechanical speed 450~600rpm. The middle touch manually moves the X-axis of the worktable so that the contact contacts one side of the workpiece. When the touch head just touches the workpiece and the red light is on, set the relative coordinate value of the point to zero; then manually move the X-axis of the workpiece workbench to make the digital display head contact the other side of the workpiece. When the digital head first contacts the workpiece, record the relative coordinates at this time.
Subtract the bumper diameter (i.e. the length of the workpiece) from its relative value to check whether the length of the workpiece meets the requirements of the drawing.
Divide this relative coordinate number by 2, and the obtained value is the middle value of the X-axis of the workpiece. Then move the workbench to the middle value of the X-axis, and set the X-axis relative coordinate value of the point to zero. This point is Zero position on the X-axis of the workpiece.
Carefully record the mechanical coordinate value of the workpiece's X-axis zero position in one of G54~G59 so that the machine tool can determine the workpiece's X-axis zero position. Double check the data again for correctness. The steps for setting the Y-axis zero position of the workpiece are the same as those for the X-axis.
