CNC milling machine tooling step - Solutions - Huaqiang Electronic Network

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Taking the workpiece center as an example, the square workpiece
1 The spindle is forwarded. The cutter is on the left side of the workpiece. Remember the X value, lift the knife, move it to the right side of the workpiece, and the right side. Remember the X value. Take the two X values ​​and average them and record them in G54. On X

2 The spindle rotates forward, the cutter is on the front of the workpiece, remember the Y value, lift the knife, move to the back of the workpiece, back, remember the Y value, take the two Y values, average, record in G54 Y on

3 The spindle rotates forward. Use the milling cutter to slowly lean against the upper surface of the workpiece, remember the Z value, and write it to the Z of the G54.

The G92 command is used to establish the workpiece coordinate system, which is related to the current position of the tool.

The application format of the instruction is: G92X_Y_Z_, which means that the coordinate value of the current position of the tool in the workpiece coordinate system is (X_, Y_, Z_).

For example, G92X0Y0Z0 indicates that the current position of the tool in the workpiece coordinate system is (0, 0, 0), that is, the current position of the tool is the origin of the workpiece coordinate system.

(1) In the X direction, use a milling cutter to contact the contour of the workpiece to obtain a reading value M1. Move the spindle in the X direction to the other side of the workpiece contour to obtain two degrees M2. Enter M=M2 on the tool compensation measurement page. -M1;
(2) In the Z direction, use a milling cutter to contact the contour of the workpiece to obtain a reading value N1. Move the spindle in the Z direction to the other side of the workpiece contour to obtain the two degrees N2. Enter N=MN2 on the tool compensation measurement page. -N1;
(3) Milling machine is completed!

First, the purpose of tool setting is to determine the spatial position relationship between the workpiece coordinate system and the machine coordinate system through the tool or the tool setting tool, and input the tool data to the corresponding storage position. It is the most important operation content in CNC machining, and its accuracy will directly affect the machining accuracy of the parts.

The tool setting operation is divided into X, Y-direction and Z-direction.

1. Tool setting method According to the existing conditions and machining accuracy requirements, the tool setting method can be selected. The trial cutting method, the edge finder, the machine tool setting tool, and the automatic tool setting can be used. Among them, the trial cutting method has lower precision, and the edge finder and the Z-direction setter are commonly used in machining, and the efficiency is high, and the precision of the tool can be ensured.

2, tool setting tool
(1) Edge finder The edge finder is mainly used to determine the X and Y values ​​of the origin of the workpiece coordinate system in the machine coordinate system, and also to measure the simple size of the workpiece.

The edge finder has eccentric type and photoelectric type, among which photoelectric type is more commonly used. The probe of the photoelectric edge finder is generally a 10mm steel ball, which is tensioned on the measuring pole of the photoelectric edge finder by a spring. When the workpiece is hit, it can be retracted, and the circuit is turned on, and the optical signal is emitted. The position of the edge finder and the coordinate position of the machine tool can be used to obtain the coordinate position of the surface to be tested. For the specific method of use, see the following example of tool setting.

(2) Z-axis setter
The Z-axis setter is mainly used to determine the Z-axis coordinate of the workpiece coordinate system origin in the machine coordinate system, or to determine the height of the tool in the machine coordinate system. The Z-axis setter has photoelectric type and pointer type. It is judged whether the tool is in contact with the tool holder by photoelectric indication or pointer. The accuracy of the tool setting is generally up to 0.005mm. The Z-axis setter has a magnetic stand that can be securely attached to a workpiece or fixture and is typically 50mm or 100mm in height.

3. For the example part of the knife, use the edge finder to set the knife. The detailed steps are as follows:

(1) X, Y to the knife 1 The workpiece is mounted on the machine table by the clamp. When clamping, the measurement position of the edge finder should be left on all four sides of the workpiece.

2 Quickly move the table and spindle so that the edge finder probe is close to the left side of the workpiece;

3 Use the fine adjustment operation, let the probe slowly touch the left side of the workpiece until the edge finder emits light, and record the X coordinate value in the machine coordinate system at this time, such as -310.300;

4 Raise the edge finder to the upper surface of the workpiece, and quickly move the table and the spindle so that the probe is close to the right side of the workpiece;

5 Use the fine adjustment operation, let the probe slowly touch the left side of the workpiece until the edge finder emits light, and record the X coordinate value in the mechanical coordinate system at this time, such as -200.300;

6 If the diameter of the probe is 10mm, the length of the workpiece is -200.300-(-310.300)-10=100. According to this, the X coordinate value of the workpiece coordinate origin W in the machine coordinate system is -310.300+100/2+. 5=-255.300;

7 Similarly, the Y coordinate value of the workpiece coordinate origin W in the mechanical coordinate system can be measured.