What is the reason why wire cutting often breaks wires

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 wire carrier.

Fit clearance with nut.

If the wear gap of the screw nut is too large, the tight nut is well adjusted, and the wear is too serious, the screw rod and nut must be replaced. 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 of the wire carrier relative to the y-axis of the carriage.

and flatness, parallelism <, 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.

Analysis of the causes of wire cutting and wire breakage:

1 The main reason for the interruption of the processing of the fast wire walking machine.

If the filament breaks at the beginning of processing, the possible causes are:

1) The processing current is too large.

2) Molybdenum wire shakes badly.

3) There are burrs or oxide scales on the surface of the workpiece.

If the filament breaks in the middle of the process, the possible causes are:

1) Improper electrical parameters and excessive current.

2) Improper feed adjustment, frequent open circuit and short circuit.

3) The working fluid is too dirty.

4) The conductive block is not in contact with the molybdenum wire or is pulled out of the dent.

5) When cutting thick parts, the pulse is too small.

6) The speed of the wire drum is too slow.

If a broken wire occurs at the end of the process, the possible causes are:

1) The workpiece material is deformed and the molybdenum wire is clamped.

2) The workpiece falls and knocks off the molybdenum wire.

As long as it is a steel guide wheel, please choose a non-type gemstone guide wheel, which is durable and silk-saving.

There is also a faucet, if it is blocked, there will also be a phenomenon of broken wire.

This situation will occur if the conductive block is jammed and the wire is too tight.

If the work is released to the maximum, there will be wire burning.

I used to break the wire, now I have invented a device, unless the outside is smashed and used for a long time to break the wire, the effect is very good, is still in the trial, it is estimated that the cutting of aluminum parts will not break the wire and burn the conductive block, if the wire cutting is installed, it may be a big improvement.

The voltage should not be too high, generally it is best not to exceed 850mv, and the electric frequency should be small when calibrating the vertical or straightening the face, and generally one or two can be hit.

There are many reasons, and if it is still under warranty, it is highly recommended to let a professional take a look.

You put the situation in detail.

1) Improper selection of electrical parameters, excessive current;

2) Improper feed adjustment, fast and slow, frequent open circuit and short circuit;

3) Improper use of working fluid (such as wrong use of ordinary machine tool emulsion), the emulsion is too thin, long in use, too dirty;

4) The pipeline is blocked, and the flow rate of the working fluid is greatly reduced;

5) The conductive block fails to contact with the molybdenum wire or has been dented by the molybdenum wire, resulting in poor contact;

6) When cutting thick parts, the intermittent is too small or the working fluid is not suitable for cutting thick parts;

7) The performance of the pulse power clipping diode deteriorates, and the negative wave is large during processing, which increases the loss of molybdenum wire in a short time;

8) The quality of molybdenum wire is poor or poorly stored, resulting in oxidation, or the wire is stretched with inappropriate tools such as small iron rods when the wire is loaded, so that the wire is damaged;

9) The speed of the filament cylinder is too slow, so that the molybdenum wire stays in the working area for too long;

10) The diameter of the molybdenum wire is not selected properly when cutting the workpiece.

Solution: 1) Adjust the pulse width to a smaller level, increase the intermittent gear, or reduce the number of power tubes;

2) Improve the operation level, adjust the slag bend to the beam rock, adjust the feed potentiometer, and make the feed stable;

3) Use special working fluid for wire cutting;

4) Cleaning pipes;

5) Replace or move the conductive block to a position;

6) Choose the appropriate intermittent and use the working fluid suitable for thick cutting;

7) Replace the clipping diode;

8) Replace the molybdenum wire and use the upper wire wheel to apply the wire;

9) Reasonable selection of wire speed gear;

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.

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.

Kiss, keep you waiting. According to Xiaodu's inquiry, Qinqin learned that in the wire cutting process, the workpiece clamping was caused by the following reasons: 1

Serious electrode wear leads to short circuit of electrode, resulting in excessive discharge intensity, resulting in broken wire clamping of the workpiece; 2.The surface of the workpiece is uneven or the hardness of the material is too high, resulting in the electrode cannot be stably discharged, resulting in the workpiece clamping wire; 3.The cutting speed is too fast or the cutting thickness is too large, resulting in too large the distance between the electrode and the workpiece, causing the discharge to be unstable, resulting in the workpiece clamping wire; 4.

Improper clamping of the workpiece or wear of the fixture causes the workpiece to move or rotate, causing the workpiece to break the wire. The measures to solve the problem of broken wire in the workpiece are as follows:1

Check whether the electrode is seriously worn, and replace the electrode in time; 2.Carry out sufficient surface treatment on the workpiece to ensure that the surface flatness meets the requirements; 3.Reduce the cutting speed and cutting depth to ensure that the distance between the electrode and the workpiece is appropriate; 4.

Check the clamping device to ensure that the workpiece clamping force is appropriate and that the fixture is replaced in time when it is worn. In addition, it is also necessary to pay attention to the operating procedures of wire cutting processing to ensure that the technical level and operation process of the operator meet the requirements to avoid similar problems.