Laughing wildly, do you think that when the on site column reinforcement is lengthened, you can use

No, electroslag pressure welding is required, and flash welding heads are mainly used for horizontal members.

The number of karpsen is a vest. Shen Yanhong is my number. tag and sit back and wait for the maniac to reply.

In addition, repeating the question, you think electroslag pressure welding is better than mechanical connection, and the general quality is better? Or is it much easier to construct?

Electroslag pressure welding is a common process and is easy to operate.

However, have you ever seen that when welding, regardless of the diameter of the steel bar, in order to weld quickly, the current is often adjusted very much? Often not enough welding time? Often the ribs of the rebar are not aligned?

Often the upper and lower rebar is misaligned? After the steel bar cutting machine cuts, the steel bar head is uneven, which is not conducive to electroslag pressure welding, and the welding time is not enough in order to pursue speed, resulting in poor joint connection? In order to submit for inspection, the sample is made separately for inspection, and the quality of the sample and the quality of the on-site construction are very different?

Have you never encountered any of the above problems?

If not, I can understand your lack of experience. But it doesn't look like your level, you should be very expert.

If you've come across these common problems, I don't understand what you mean by that in the question you linked below.

The reason why electroslag pressure welding is used more is due to the cost. Instead of electroslag pressure welding, or easy construction. Of course, mechanical connections are preferred.

Could it be that you are born in Baotou? Cost first? Do you only pick the cheapest? The cheapest, the best?

If you squirt casually and look back and have forgotten, give you the reference address.

The question is how to weld the flash welding, and the column reinforcement is lengthened.

There are electric welding, there are also lap joints, depending on what the construction requirements are, it is generally electric welding.

Yes, but the joint should be moved to the lower connection area according to the requirements, and the difference in reinforcement should not exceed two levels.

Rebar larger than 25 mm should not be used flash butt welding or binding joints! And the steel bars used for the frame columns should be welded by electroslag pressure!

There are 3 ways of flash butt welding: continuous flash welding, preheating flash welding, flash-preheating-flash welding, one is suitable for welding steel bars with a diameter below 25.

2. It is suitable for welding steel bars with large diameters.

3. The diameter is greater than 25, and the cut end face is not flat enough to reinforce.

It is best to use a mechanical connection, but you can also use preheated flash welding.

1. Flash butt welding should be used for butt welding of steel bars; The welding process method is selected according to the following provisions:

1) When the diameter of the steel bar is small and the grade of the steel bar is low, it can be used within the specified range.

continuous flash welding";

2) When the provisions are exceeded, and the end face of the steel bar is relatively flat, it is advisable to use "preheating flash welding";

3) When the regulations are exceeded, and the end face of the steel bar is uneven, "flash-preheating flash welding" should be used.

2. The upper diameter of the steel bar that can be welded by continuous flash welding should be determined according to the specific conditions such as the capacity of the welding machine and the grade of the steel bar, and should comply with the specifications.

3. When flash butt welding, the appropriate welding parameters such as extension length, firing retention, top forging retention, and transformer number should be selected. The retention in continuous flash welding should include the burn retention. There is electric top forging retention and no electric top forging retention;

The retention amount of flash 1 preheating flash welding should include: primary burning retention, preheating retention, and secondary firing retention. There is electric top forging retention and no electric top forging retention;

4. The transformer stage should be based on the steel bar grade. Diameter, welding machine capacity and welding process method and other specific situation selection.

5. When RRB400 steel bar flash butt welding, compared with hot-rolled steel bar, the extension length should be reduced, the welding transformer stage should be increased, the heating time should be shortened, the top forging should be fast, and the condition of fast heating and fast cooling should be formed, so that the length of the heat affected zone should be controlled within the range of times the diameter of the steel bar.

6. In the production of flash butt welding, when there is an abnormal phenomenon or welding defect, the cause should be found, and measures should be taken to eliminate it in time.

The skills of the general workers are not up to the requirements, and it is best to connect them with sleeves!

The steel bar of the foundation column is lengthened by flash butt welding, and then welded to the column by electroslag pressure welding, and as a result, the joint of flash butt welding enters the encryption area, how to rectify it? A: If the specification or design does not agree to do so.

This rebar had to be cut. Replace a steel bar without flash butt welding, and electroslag weld it.

Tie a steel bar of the same diameter to this steel bar, the length from the electroslag pressure weld to the end, and re-weld the upper column bar. If the foundation concrete is completed, the reinforcement is planted.

If necessary, the infill area can be used by soldering or against drought.

Answer: It is not possible to operate the longitudinal stressed steel bar of the seismic column directly connected by flash butt welding (but first weld the longitudinal stressed steel bar of the seismic column with flash butt welding, and weld it 'indirectly', such as a total layer of steel bar, and weld it with flash butt welding, which is okay). In other words, flash butt welding cannot be used.

Flash butt welding is generally welded in the steel barb, and the steel bar that is installed after welding is not suitable for the welding of the site, is mostly used for the connection of horizontal member steel bar such as beam plate, and the lower end of the column steel bar has been fixed, can not be constructed.

The reinforcement connection of the column is generally electroslag pressure welding.

Yes, but treat it as a joint. That is to say, the upper and lower non-connecting areas should be flashed, and only one joint should be ensured on a stressed longitudinal bar as much as possible. If the column is tied with butt welded steel bars done in the background, there will often be two joints on a longitudinal bar (one welded joint and one sleeve joint).

The use of butt welding to make full use of the remaining rebar heads is more common in us, although it violates the code. Ay... I'm helpless!

The state has stipulated that the column reinforcement can not be used flash butt welding, if it is a high-rise no, if it is a low-rise is generally okay.