CNC Knowledge: CNC CNC Machining Center Step of Knife

Take the center of the room as an example

The main axis of the square part 1 is positive, and the milling cutter is on the left of the room. , and take the average value of these two X values ​​at the G54 The main axis of X on the X X is in rotation. At the back of the part, count on the back, do not forget the value Y, take these two values ​​Y, take the average value, save the average value, save the recording, save the recording, save the ‘ Recording, save the recording, save the registration and save the record. The G92 instruction is used to establish a part coordinate system, which is linked to the current location of the tool.

The application format of this instruction is: G92 x_y_z_, which means that the coordinate value of the current position of the tool under the coordinate system where the tool is located (x_, y_, z_).

(1) In the direction of X, use milling cutters to contact the part of the part to obtain a m1 reading value, x direction moving the spindle on the other side of the part of the room, get two degrees from the ground M2, enter M = m = on the additional measurement page of the knife m = M2-M1;

(2) In contact with the outline of the part in the direction of Z, we can obtain a reading value N1, the direction Z of the mobile spindle on the other side of the outline of the room, get two N2 degrees on the ground , enter n = on the additional measurement page of the MN2-N1 knife.

(3) Complete the accusation knife 1. The goal of the knife and the knife is to determine the position of the space between the coordinate system of the room and the coordinate system of the machine tool through the knife or the knife tool, and enter the knife data in the corresponding storage position. This is the most important operational content in the CNC treatment, and its precision will directly affect the processing of parts. The knife operation is divided into x, y at the pair and z at the sword.

1. knife method

Depending on the existing conditions and the processing requirements, you can choose the knife cutting method. Among them, the precision of the cutting method is relatively low, and the search for border in the treatment is commonly used in the treatment of the knife.

2. Tool tool

1. Finder

The borders are mainly used to determine the X and Y values ​​of the point of the part coordinate system in the machine’s coordinate system. The border search device has biased and photoelectric types, including more commonly used photoelectric types. The header of the border of the opoelectronics is generally a 10 mm steel ball. The search for borders and the coordinates of the machine tool can obtain the coordinate position of the survey surface.

2. The adjustment device of the Z axis

The Setter of the Z axis is mainly used to determine the coordinate of the Z axis of the original point of the part coordinate system in the machine coordinate system, or the height of determining the tool system in the coordinate system of the machine tool. The Z-OXIS sector has types of photoelectors and pointer. The Z-Axis sector has a magnetic table, which can be firmly attached to the room or the lighting.

Third, with the parts of the knife, use the side researcher to the knife

The detailed steps are as follows:

1. x, y to the sword

(1) Put the room through the luminaire on the machine tool table.

(2) The Ouchette and the main mobile main axis, so that the founder of the border was measuring the head to the left side of the room;

(3) Use a fine adjustment operation to allow the measured head to slowly contact the left side of the room until the border search device shines and note the x-coordinated value in the coordinate system of the Machine at present, like – 310,300;

(4) Lift the border search on the surface of the room, quickly move the treating and the main axis, so that the measured head is close to the right side of the room;

(5) Use fine adjustment operations to allow the measured head to slowly contact the left side of the room until the border search device shines.

(6) If the diameter of the measured head is 10 mm, the length of the part is -200,300 – ( – 310.300) -10 = 100. Depending on this, the original point of the coordinate system of the Part W IS -310.300 + 100/100/100/100/100/100 2 + 5 = -255.300;

(7) Similarly, the point of origin of the coordinate system of part W. The Y coordinate of the mechanical coordinate system

2. Z with a knife

(1) Delete the border search device and install the tools used in process processing;

(2) Place the Setter of the Z axis (or a fixed height of the knife, the same below) on the plane on the room;

(3) quickly move the main axis, so the final surface of the knife is close to the surface of the Z Setter axis;

(4) Use a fine operation on the final surface of the tool by slowly contacting the surface of the Z axis until its pointer indicates at zero;

(5) Read the Z value in the machine’s coordinate system at this time, like -250,800;

(6) If the height of the Z axis sector is 50 mm, the Z coordinate value of the original point W of the coordinate system of part W in the mechanical coordinate system is -250.800-50- (30-20) = -310.800.

3. Enter the value X, Y and Z measured in the storage address of the coordinate system of the part of the Tool Tool (generally use the code G54-G59 to store the knife settings).

Fourth, precautions must pay attention to the following problems when the knife works:

(1) Use the correct knife tool as a function of treatment requirements to control the knife error;

(2) During the knife, the precision of the knife can be improved by modifying the fine amount and the amount;

(3) Be careful and operates cautiously when the knife, in particular, pay attention to the direction of the movement to avoid the risk of collision;

(4) The storage address corresponding to the program must be stored to prevent the serious consequences from generating errors.

The entry and modification of the compensation value of the tools are entered into the storage position corresponding to the program as a function of the real size and location of the tool. It should be noted that the accuracy of the offset data, symbolic accuracy and data correction threatened processing, resulting in a risk of collision or canceled processing.