Wire cutting stops at the section of wire cutting, why does wire cutting stop when the high frequenc

It is possible that a relay is broken, causing the wire barrel to stop, and the high frequency is still in a discharge state, while the low-speed or stationary molybdenum wire can not withstand the high-frequency electricity and burns out.

It is recommended that you cut off all power supply after the machine finishes machining and see if the filament is broken! The short circuit is certain, the main thing is to judge where the electricity is leaking! There are no traces of burning!

Check whether the three wires connected to the conductive block are aging and causing a short circuit!

Hello dear! Why do you stop to see if the wire is on the conductive block, maybe the wire is not worn, and the high frequency starts to cut, and the movement is controlled by electric automatic control, and the speed and direction of movement are controlled by the program. After giving high frequency, the protection self-locking will be realized.

To get it going, the cutting procedure must be initiated. Stop, is the screw tube stopped or the number on the CNC does not go. If the wire cylinder is stopped, check the broken wire protection part, you can see the shutdown without breaking the wire protection, and check the high-frequency part and the sampling frequency conversion part if the number does not go.

Wire cutting: Wire cutting refers to EDM wire cutting, which is developed on the basis of EDM perforation and forming processing, and has replaced EDM perforation and forming processing in some aspects. Wire cutting needs to be operated by an EDM wire cutting machine, and the basic physical principle is that free positive ions and electrons accumulate in the field, and soon form a conductive channel that is ionized, and an electric current is formed between the two plates, resulting in countless collisions between the particles, forming a plasma region, and soon rising to a high temperature of 8000 to 12000 degrees, instantly melting some materials on the surface of the two conductors.

1. Check whether there is any abnormal sound in the wire transmission gear and coupling, which is a phenomenon that will only occur after the gap is caused by wear, if there is one, replace it first;

2. Check the matching gap between the screw rod and the nut, if the screw nut wear gap is too large, the tight nut is well adjusted, and the screw rod and nut have to be replaced if the wear is too serious. In addition, the wear problem of the screw rod is also easy to cause the phenomenon of wire cutting and ellipse;

3. Check whether the screw bearing is worn, and it is recommended to replace it if the wear is serious;

4. Measure the parallelism and flatness of the wire carrier relative to the y-axis of the carriage, the parallelism is <, the flatness is appropriate, and the deviation is too large to be adjusted to the tolerance range;

5. Measure the parallelism and flatness of the guide wheel hole relative to the wire carrier after the upper wire arm, the parallelism is <, the flatness is appropriate, and the deviation is too large and must be adjusted to the tolerance range;

6. Check whether the rear guide wheel is flexible, if there is a stagnation in the operation, it is recommended to replace the guide wheel;

7. Check whether the conductive block has pulled out of the wire duct and stuck molybdenum wire, if so, it is recommended to replace it.

Prepare the workpiece blank, clamping tools, measuring tools, etc. before processing. If you need to cut the workpiece with the shape of the inner cavity, or if the process requires processing with a wire piercing hole, the blank should be drilled with a wire piercing hole in advance, and then operate according to the following steps:

1) Start the power supply of the machine tool into the system and prepare the processing program;

2) Check whether there is any abnormality in each part of the machine tool, such as the operation of high frequency, water pump, screw cylinder, etc.;

3) Threading, threading, and calibration;

4) clamping workpiece, alignment;

5) Pair the wire, establish the starting position of cutting;

6) Start the wire walking, open the working liquid pump, and adjust the nozzle flow;

7) Adjust processing parameters;

8) Run the processing program to start processing;

9) Monitor the processing process, such as wire walking, discharge, working fluid circulation, etc.

10) Check whether the parts meet the requirements, if there is an error, it should be dealt with in time to avoid the scrapping of processed parts.

There are many factors that cause broken wires, and here I will only introduce a few aspects:

1. Wire baffle and conductive block: after a long time, there will be a groove on the surface, and its width is less than the diameter of the molybdenum wire, when the molybdenum wire is used for a period of time, the middle working section is thinner than the two ends, and the coarse molybdenum wire is stuck in the groove when commuting, causing wire breakage.

Solution: Rotate the wire stop and conductive block at an angle every once in a while, or replace them.

2. Processing parameters: the tracking should not be too tight, otherwise it is easy to short-circuit, and the short circuit will cause the current of the molybdenum wire to be too large, and the local high temperature will be generated, which will accelerate the aging, embrittlement and easy folding of the molybdenum wire. The short-circuit current should be set below 2A.

3. Tight wire: After a period of use, the molybdenum wire will be elongated, so that the tension of the molybdenum wire will decrease, and the wire will be easy to break. The position of the conductive block of some machine tools is not ideal, which will cause the tightness of the head and tail of the molybdenum wire to be different, and will also cause the wire to break.

4. Cutting fluid: the concentration should be appropriate, too high and too low are not good.

These are some of my experiences, and I hope it will be helpful to you.

There are many factors that go into broken filaments. Molybdenum wire tension, guide wheel wear, conductive block jamming, guide wheel bearing jamming. The most important thing is that when the cutting is completed, the iron falls and instantly jams the molybdenum wire. You haven't described exactly when most of the broken filaments were.

If it is a new molybdenum wire, the conductive block is worn, the saponified water is too dirty, the current selection is not suitable, the running screw gap is too small, and the screw rod of the screw is short of oil, which may cause wire breakage

Depending on how much work you do every day, it's normal for you to do that.

If the designed program is to return to the origin, it can be left empty at the origin and replaced with new yarn, and then it can be cut from the beginning or reversed. If the designed program does not return to the original point, it needs to be reversed after emptying and changing the wire.

The wire breaking process begins with the instability of the processing process, and the unstable processing promotes the concentration of discharge at one point, and the concentration of discharge causes the discharge to be intensive in time. This causes the energy in the input gap to increase and concentrate at one point, resulting in a local high temperature, which causes the electrode wire to be burned off. The whole process of breaking the filament.

Causes of Broken Wires The direct cause of broken wires is an increase in the thermal load of the input gap and is concentrated at one point.

The cause is the instability of the processing process. Since the cause of wire breakage is the instability of the processing process, it is the way to fundamentally overcome the problem of wire breakage by taking effective measures to make it enter a stable state as soon as possible according to the signal of instability in the processing process.

It mainly depends on what you're working on. If the program is back to the origin, then you can start cutting or reverse cutting after changing the new silk after leaving the original point, if your program is not back to the original point, it can only be cut back after emptying.