What to do if the tapping tap is broken, and how to take out the tap when the tapping is broken

The tapping tap is broken and the removal method:

Method 1: Generally use a small punch to slowly punch out, or break the tap, make a three-claw special tool stretched out into the chip groove and spin it out, the large tap can be stacked out with electric welding, or use the flame bar tap to burn and anneal and then use the drill to get rid of it, electric spark ablation, use an 8 tap to screw on two nuts, and then use three steel wires to penetrate into the chip groove, align the chip groove of the tap in the hole, see if it can be twisted, if the workpiece is not big, put it in the fire and then twist it.

Method 2: The material is high-speed tool steel, if the wire extractor can not be taken out, it can be heated to between 1200-1300 degrees with oxygen, and then the water cooling makes it crack, and then the broken cone is knocked off with the corresponding object.

Under normal conditions, the broken cone when tapping iron castings is easy to take out with a wire extractor, which is due to the fact that the brittle material is less extrusion deformation in the tapping process, and it is directly cut to form a screw hole, and the steel parts are in the tapping process due to its good plasticity, so a part of the material produces plastic deformation and increases the thread height, and also increases the friction between the tap and the thread profile surface of the screw hole, resulting in the tap is not easy to take out. However, the steel is still in the austenitic solid phase zone at about 1200 degrees, and short-term heating will not cause grain growth and affect the mechanical properties of the material.

It is not clear whether it is the first tap or the second tap, the position of the tap is usually at the position of the entrance, I don't know where you break it in the actual process, I have encountered a similar situation, after the tap is broken at the entrance, it is usually possible to leave a little small tail, I use a screw that is slightly larger than the tap, put it on the small tail of the tap, weld with a special electrode (such as 506, etc.), pay attention to the quality of the welding, must be firm, ensure that the tap is not welded together with the bottom hole, and then twist the screw nut with a wrench, to be light, The strength must be appropriate, and it must not be twisted.

Personal experience, if you are in the process, the position of the tap can not be welded as mentioned above, the base is heated by oxygen welding, and the hole is sealed with butter, because the thermal expansion coefficient of the tap is definitely different from the thermal expansion coefficient of the base, and then use a tool made in advance (similar to tweezers) to twist it out of the hole.

I hope to give you some advice on how to remove the tap that is broken in the bottom hole.

Blind hole tapping broken tap is not easy to treat. Small ones can be knocked off with an electric spark. If the big surface does not require it.

You can attach it with an electric welder and a nut. Just unscrew it. In the case of small through-hole parts, wire cutting.

If you want to talk about tools, look at the Japanese OSG, he also has this kind of thing.

Supplement the upstairs when welding taps, put a layer of butter on the surface close to the tap, or act as you see fit, to act as a protective film to prevent damage to the machined surface during the welding process.

Our factory seems to be solved by discharge. The tooth holes are not large. The discharge is very fast.

What if there is no EDM or wire EDM? The amount of tapping in our house is quite large, and we often have this problem, is there a simple and effective one?

Hole removed.

Tips for breaking the tap: When the broken part of the tap is exposed, you can use pliers to twist it out, or gently remove it with a sharp chisel; It is also possible to weld a hexagon nut on the broken cone, and then gently pull the hex nut with a wrench to exit the broken tap. When the broken part of the tap is in the hole, you can use the broken tap with a square tenon to screw 2 nuts, use the steel wire (the number of slots is the same as the number of tap grooves) into the empty groove of the broken tap and nut, and then use the hinge to pull the square tenon in the exit direction to take out the broken tap.

The breaking of the tap often occurs suddenly under the condition of great force, so that the cutting edge of the half-cut tap broken in the screw hole is tightly wedged in the metal, and it is generally difficult to make the cutting edge of the tap separate from the metal, in order to make the tap be loose in the screw hole, the vibration method can be used. When vibrating, use a sharp chisel against the chip groove of the tap, and use the hammer to press the front and back directions of the thread repeatedly and gently until the tap is loose, and if there is debris during operation, use the magnet to suck it out. Use acetylene flame or blowtorch to anneal the tap, and then use the drill bit to drill, at this time the diameter of the drill bit should be smaller than the diameter of the bottom hole, and the drilling hole should also be aligned with the center to prevent the thread from being drilled.

It is also possible to weld an upper hexagon head or an inner hexagon head screw, and then unscrew out the broken tap by loosening the screws.

It can also be EDM or wire EDM, or cut off with an old milling cutter.

First, you can use an electric spark to break the silk tap that is broken inside; It's that the cost of EDM is too high; the second is to slowly kick out the chisel made of Fil tapping;

You can use air plasma cutting to chop the taps and pour them out.

Tooth fracture is a common dental disease, mainly caused by tooth loss or tooth churn. There are several methods of tooth breaking: 1. Filling:

Dental fillings are the most common method, which can repair tooth defects and restore the normal function of the teeth. 2. Dental implants: Dental implants are a more advanced method, which can be used to repair tooth defects and restore the normal function of teeth with artificial teeth.

3. Dental implants: Dental implants are a more advanced method, which can be used to repair tooth defects and restore the normal function of teeth with artificial tooth roots. 4. Orthodontics:

Orthodontics is a more advanced method that can be used to repair tooth defects and restore the normal function of the tooth with a brace. 5. Tooth extraction: Tooth extraction is a more advanced treatment wheel therapy method, which can be used to repair tooth defects and restore the normal function of teeth with tooth extractors.

Summary. Hello friends, the reason may be 1. The quality of the tap is not good: the main material, tool design, heat treatment, machining accuracy, coating quality, etc. For example, there is too much difference in size at the tap section transition or there is no design transition fillet.

What are the reasons for the broken tap of the automatic tapping machine.

Hello friends, the reason may be 1. The quality of the tap is not good: the main material, tool design, heat treatment, machining accuracy, coating quality, etc. For example, there is too much difference in size at the tap section transition or there is no design transition fillet.

It doesn't matter if the height of the tap is adjusted.

The height adjustment of the silk tap is related, but this must match the height, this is the foundation.

Generally, the tap screws broken in the workpiece will be slowly removed by hand, but this method is difficult, some waste of time, and delay the construction period.

2. EDM method

Generally, it will be operated with a professional machine, which is more time-saving and labor-saving, and it is more convenient and simple to take out in this way than manual take-out, but it is difficult to accurately take out the broken tap for the processing surface with a more complex angle.

3. Take the section of the tap machine

This is the use of the principle of electric erosion, the tap break in the workpiece and the electrode contact short circuit to produce sparks, corrod the tap break, and break the tap little by little to take out.

4. Top with a steel rod

Take the steel roller and knock it slowly with a small hammer at the crack of the tap, the tap is more brittle, and finally knock it out into slag, or more simply, directly drill the threaded hole of the broken tap and drill it alive and bored. Pretend to be sensitive.

Summary. When the heavy mold tooth tapping is damaged by the chain, the following measures should be taken to repair it: 1. Check the size of the mold tooth tapping to determine whether there is chain damage; 2. If there is chain damage, the grinding method should be used to repair it, and the size of the die tooth tapping should be ground to the normal size; 3. If there is still chain damage after the size grinding of the mold tooth tapping, the replacement method should be used to repair and replace the new mold tooth tapping; 4. If there is still chain damage after grinding the size of the die tooth tapping, the replacement method should be used to repair and replace the new mold tooth tapping, and ensure that the size of the new mold tooth tapping is correct; 5. Finally, the mold tooth tapping should be lubricated to ensure the normal use of the mold tooth tapping.

When the heavy mold tooth tapping is damaged by the chain, the following measures should be taken to repair it: 1. Check the size of the mold tooth tapping to determine whether there is chain damage; 2. If there is damage to the chain, the grinding method should be used to repair it, and the size of the die tooth tapping should be ground to the normal size; 3. If there is still chain damage after the size grinding of the mold tooth tapping, the replacement method should be used to repair and replace the new mold tooth tapping; 4. If there is still chain damage after grinding the size of the die tooth tapping, the replacement method should be used to repair and replace the new mold tooth tapping, and ensure that the size of the new mold tooth tapping is correct; 5. Finally, the tapping of the standby orange mold should be lubricated to ensure the normal use of the tapping of the mold teeth.

Fellow, I really didn't understand, I can be more specific.

The chaining degree of the template tooth tapping and cleaning wire means that the tapping size of the tapping hole on the mold becomes smaller, resulting in the tapping screw being unable to be tightened and the tapping screw loosening. Proto-eggplant branch cause: 1

The surface of the mold is not maintained in time, and the size of the tapping hole becomes smaller, resulting in the tapping screw cannot be tightened. 2.There are contaminants on the surface of the mold, and the size of the tapping hole becomes smaller, resulting in the tapping screw cannot be tightened.

Workaround:1Carry out timely maintenance on the mold surface to keep the mold surface clean to prevent the size of the tapping hole from becoming smaller.

2.The tapping hole is modified to make it larger in size so that the tapping screws can be tightened. Personal Tips:

1.Perform regular maintenance on the surface of the mold to prevent the size of the tapping hole from becoming smaller. 2.

Perform regular inspections of the tapping holes to ensure that the tapping screws can be tightened.

The thread below stainless steel M6 can be processed with an extrusion tap and tapping oil, and the thread above M6 can be processed with a cutting tap, and there are many reasons for easy breakage of the tap

First of all, we all know that stainless steel processing is a difficult material to cut, and it is easy to produce a hardening layer during the machining process, so when processing the threaded bottom hole, the speed is not easy to be too high (the linear speed is not more than 9m min), otherwise it is easy to cause work hardening, and then it will be easy to break the tap when reprocessing the thread.

The second reason is that the processing material is not heat-treated, and the poor cutting performance will also cause the broken tap, and the third cutting fluid is not properly selected, resulting in the broken tap when processing the thread.

The third reason is that the diameter of the bottom of the wire is too small.

It is recommended to determine the bottom drill hole diameter according to the following formula:

In the process of tapping threads, the cutting edge is mainly to cut the metal, but there is also the effect of squeezing the metal, thus causing the phenomenon that the metal is convex and flows to the tooth tip, so before tapping, the hole diameter (that is, the bottom hole) should be greater than the inner diameter of the thread. The diameter of the bottom hole can be found in the manual or calculated according to the following empirical formula:

Brittle materials (cast iron, bronze, etc.): drilling diameter d0=d (thread outer diameter) pitch).

Plastic materials (steel, copper, etc.): drilling diameter d0 = d (thread outer diameter) - p (pitch).

The fourth reason is that the cutting speed and feed are unreasonable

When there is a problem in processing, most of the domestic users are to reduce the cutting speed and reduce the feed, so that the propulsion of the tap is reduced, and the thread accuracy of its production is greatly reduced, so that the roughness of the thread surface is increased, the thread hole diameter and thread accuracy can not be controlled, and the problem of burr is of course more inevitable. However, if the feed speed is too fast, the resulting excessive torque can also easily cause the tap to break.

When tapping, it is necessary to pay attention to the first hand to be steady, the silk tapping is best to be vertical, and the taps should be dipped in tapping oil first, so that it will be easier to tap. Then don't attack hard, and when you feel a little dead, you can retreat and attack again.

However, it doesn't matter if the tap is broken, after all, even if you have been a fitter for more than ten years, there will be a situation of tapping and breaking the tap, and you can use the broken tap machine to beat it, which is this machine, which is very convenient.

Broken taps are very common when tapping, there are several reasons, it may be caused by too fast rotation, and there is too much hardness of the tapping product may cause broken taps.

I work in the factory, tapping is often, I think broken, is due to your blind clockwise twisting, did not go back, only to cause breaking, we make stainless steel, stainless steel is very sticky, the relative teeth are very brittle, at the same time I think it will produce powder, and a lot, so to cast iron, in the clockwise two times to go back twice, let the powder out, not to block the taps forward, understand?

Are you mechanical tapping or manual wrenching If it is manual, I said the same as the friend above In addition, you can also add some oil Mechanical tapping First of all, it is better to fix the processed parts or add some oil.

If the hardness of the workpiece material is high, it will be knocked out, and if it is soft, it will be sparked. This kind of thing happens a lot, but we work with nickel alloys here, so we use all the knocks.

If the tap is large, use a special three-grasp screw-out tool, and if it is small, it will spark with electricity.

If it is a blind hole, if there is more outside the broken tap, it is easier to do, if it is all broken into it, it is more difficult to do, you can only play sparks, the cost is too high, you can do it yourself, and it costs at least 12 yuan to play one; If it is a through hole, the broken is an ordinary wire tap, and the wire cutting is used to cut the wire tap cross direction, and it can generally come down; If it is broken by spiral tapping, it is necessary to discharge the fine hole first, and then cut the wire.