1, machine tool structure introduction

Control axes X, Y, T and C and their functions, names and functions of hydraulic punch, workbench and pneumatic components.

2. The transmission principle of each servo shaft

Control axes x, y, t, c and their functions. The machine tool * * * has two linear coordinate axes, X and Y. The X axis moves left and right, and the Y axis moves back and forth. The steel plate is moved back and forth, left and right by the clamp to the position to be punched. T-axis is the mold library, which is mainly used to store and call molds. When the tool selection program is executed, the corresponding die is transferred to the punch. The modulus can be divided into 20, 24, 32, 40, etc. according to the number of machine plows. The C-axis is controlled by a rotatable workstation, usually equipped with two workstations, which can expand the application range of the mold. Can rotate freely between 0-3 and 59.999, and can handle complex graphics.

3. Disassembly, maintenance and installation of the die, thick plate, hard material and step-by-step stamping will shorten the life of the die. Before putting the mould into the mould position, the periphery of the mould position should be cleaned. After cleaning, spray some oil on the punch and then insert it into the die position. Female die can be put into the station in a simple way.

4. Criteria for judging whether the concentricity of upper and lower dies needs correction.

When installing a new mold or a ground mold, first confirm the gap between the mold and the plate matching. If it is found that the punching burr is more serious only after punching for many times, the wear degree of the die can be judged from the edge, whether the edge part is round or frosted, especially the diagonal of the cutting edge. It can be judged that concentricity needs to be corrected. The steps are as follows: loosen the four compression screws, put the core rod into the insert sleeve, put the core seat into the lower die, and then turn the work station under the striking head. The mandrel enters the core seat, and the turntable positions the four compression screws tightly. Pay attention to adding locking glue to take out the core rod and core seat. When the core seat is turned to the die changing position, the core rod and the core seat can be taken out.

5. Synchronous correction after error of upper and lower turntable.

If the upper and lower turntables are misaligned due to material collision, synchronous adjustment must be made according to the following steps:

A, loosen the tension of the lower or upper turntable.

B in manual mode, rotate the lower turntable Tl under the striking head.

C. manually turn the upper turntable Tl to the lower part of the striking head.

D, wear in and out many times.

E. Fine-tune the upper and lower turntables until the shaking of the turntables is minimum after inserting the pin.

F, in the case of pin-in, tighten the tension of the lower or upper turntable.

The g and t axes return to the reference point.

6. Adjustment of mold insertion modulus and closing height

The entrance of the die depends most on whether the waste can fall after stamping. The normal entrance is about 1 mm, the closing height of the long guide die is 207MM, and the closing height of the short guide die is140 mm.

7, oil-water separation method, oil mist refueling method, pneumatic system has oil mist to provide lubricating oil, should always check the oil level of oil mist, oil is too little, should be timely to make up. The gas storage tank on the gas path should drain water once a week. When draining water, cut off the air source. Use an air pipe with an inner diameter of 1 0 and a length of1m, one end of which is connected to the bent nozzle drain valve below the air storage tank, and the other end is led to the water storage tank. Slowly open the handle of the drain valve until the water is discharged, turn on the air source and restore the normal working state.

8. Adjustment method of pressure regulating valve and throttle valve.

9. Confirm the distance from the punch to the upper die striking head.

10. Mechanical adjustment method of turntable origin. The upper and lower turntables are driven by a digital AC servo motor, which is connected to the input end of a gear reducer through a flexible coupling, and the output of the reducer is driven to the upper and lower turntables through chains and gears. The adjusted chain should have a sag of 6-13mm.

1 1, die grinding

Mold should be ground repeatedly as soon as possible, which will prolong its life. The wear degree of the mold can be judged from the edge. The edge part is round or Bai Rushuang. Please grind it at this time. If you don't grind at this time, the mold will wear out quickly. If the punch and die are ground at a proper time, the service life can be extended by 3 times. From the new mold to the need for polishing, the stamping time varies according to the thickness of the plate. Punch for punching thick plate is seriously worn, so it must be worn much more than the female die. The edge of the polished punch H should be at right angles, and the edge is the part that bears impact and pressure when punching materials.

12, turntable: chain tension and synchronous adjustment, synchronous belt is the guarantee of accurate transmission. Generally speaking, we need to be nervous. If slack is found, we only need to twist the tensioner to ensure that the upper and lower tensions are the same. The chain is the guarantee of accurate positioning of the station, which is only a rough positioning, so we require the chain to be relaxed to a certain extent, neither too tight nor too loose. If it is too tight, the positioning pin may not be inserted, and if it is too loose, the shaking of the turntable will increase.

13. Name and function of pneumatic components of lathe bed

Pneumatic fixture. Used for clamping workpieces. Rotary table positioning cylinder. Used to position the upper and lower turntables to synchronize them with the pneumatic origin cylinder. The first reference rotary positioning cylinder used to position the workpiece is used to rotate the workbench to realize 360-degree rotation, and the cylinder-workpiece is repositioned outside the processing range of 1 time, which is used when positioning is needed twice.

14, the relationship between the die gap and the thickness of T-plate, and the lower die gap is determined according to the processed plate thickness. For example, the lower die for processing 2MM plate can't process 3MM plate or 1MM plate, otherwise it will aggravate the wear and even break the die. Stamping die clearance is one of the most important factors in stamping process. Inappropriate gap, short die life, or burr, make the shape of the cut irregular and increase the demoulding force.

Second, the CNC need to learn the introductory courses are:

Understanding of mechanical drawing, mechanical basis, tolerance fit and technical measurement, metal cutting principle and tools and machine tool fixtures. CNC machining technology, programming and operation of CNC machine tools.