Wire cutting machine tool structure

WEDM is a machine tool with high degree of mechanical automation among CNC machines. 1. The fuselage guide rails are made of high hardness and wear-resistant materials, supplemented by manual hydraulic lubricating oil injection, which are distributed to each guide rail through various oil pipes to realize lubrication and reduce friction coefficient, with 2 pieces per shaft; There are also machine tools that use aerostatic guide rails, and the friction coefficient of this guide rail is close to zero.

2. The screw adopts spiral displacement, and the displacement of the screw is determined by the speed of the servo motor. At present, the minimum manual single-step movement is 0.00 1MM, and the length of the lead screw determines the movable range of the machine tool. After the screw clearance can be measured, it is corrected by using the correction in the system parameters, and each screw forms a shaft.

3. Servo motor (three-phase motor) The rotating speed of the servo motor is determined by the voltage level selected by the main board in the servo electric box. The minimum motor step is equivalent to a displacement of 0.000 1 mm, which is applicable to all shafts.

4. Limit switches (closing switches) Limit switches are set at the left and right ends of the displacement range of the screw rod, which is within the actual movement range of the screw rod. When the machine moves until the limit switch is closed, the electric signal is input to the main board, and the main board outputs the electric signal to stop the servo motor, two for each shaft.

5. Decelerating switch (closing switch) The closing switch is set in the switch that does not reach the limit. When the screw rod moves to the closed position of the limit deceleration switch, electrical signals are input to the main board, and the main board outputs electrical signals to reduce the speed of servo motors, two for each shaft.

6. The servo electric box is an integrated circuit that receives the output electric signal and controls the power supply, and has a central processor.

7. Display screen Ordinary electron tubes, liquid crystal displays, and touch screens are integrated panels that output display and input signals.

8. The hand controller integrates common functions on a small handle, which is convenient for users to operate and has input function. WEDM has a set of water circulation system, which is used to purify water and deionized water to achieve the purpose of reprocessing working fluid.

1. There is a sewage tank and a pure water tank in the storage place of the working fluid in the water tank.

2. The sewage pump pumps the sewage into the filter, the ion pump injects the filtered water into the resin barrel to remove ions, the water injection pump quickly injects the working fluid into the working tank to achieve the purpose of immersion processing, and the high-pressure pump introduces pure water into the upper and lower heads with high power to remove the threading of the threading wheel caused by the electrofusion and high-pressure jet generated in the work. The waterway layout of various machine tools is different, but the principle is the same.

3. The purpose of three-way valve is to separate the water flow to realize different functions, which is converted from air.

4. Position sensor (turn-off switch) Position sensing on the three-way valve displays position information on the screen through the input electrical signal of the main board.

5. The sewage tank of the water level sensor has 1 pure water tank, which senses the water level to determine whether each pump can work. When the water level is lower than the water level, the input electric signal is processed by the main board and then output to stop the operation of the related pumps.

6. The purified water from the cotton core is used to clean the conductive block.

7. The filter filters the metal chips in the sewage.

8. Water pressure sensor filter element, the water pressure sensor on the cotton core is used to judge whether the water pump can inject water into it, and it has overvoltage protection.

9. Resistivity measurement of ion sensor, measuring ion value flowing into resin barrel.

10. Resin barrel is a container for storing resin, which is extracted from petroleum and used for deionization. The air pressure supply system realizes the air pressure supply of the required parts by opening and closing the valve. The supply hardware includes three-way valve, automatic threading system, various parts of the cylinder and so on. Electrical switch is used to realize airflow conversion.

1. When the air pressure provided by the air pressure sensor is less than the preset value, input the electrical signal to stop the hardware from working.

2. The total supply system of each gas path of the gas path switching valve is distinguished by short signs in an integrated way.

3. The electrical system switches the electrical system of each port of the air valve. Input voltage to open the air valve, stop input and close the air valve. The circuit mentioned here refers to the power supply circuit in the process of machining.

1. Contact wire connects the conductive block of the upper machine head with the workbench. When discharging, when the electrode wire touches the workpiece clamped on the workbench, a short circuit phenomenon is formed.

2. The high-voltage line is used to handle the negative line of the input current and connect the upper and lower heads. When the wire is discharged, it is negatively charged and produces a gap discharge with the workpiece.

3. The mesa wire is used to handle the positive wire of the input current and is connected to the workbench.

4. The loop connects the left and right ends of the workbench to increase the current loop. Some machine tools have omitted this line through improvement.