How to repair cracks in car girders, trucks?

1. Replacing the girder, of course, can make the car meet the requirements of use, but this repair method has a long maintenance time, often several days and dozens of days. The repair cost of replacing the girder is high, often thousands of yuan and tens of thousands of yuan. In particular, delays are often costly and unacceptable, so the replacement of girders is generally excluded.

2. After direct reduction, it is in the fracture or crack part.

The repair method of butt welding repair without disintegration and repair is to correct the bending part of the girder, and directly hit the groove on the inner and outer surfaces of the fracture or crack part, and repair the damaged part by using the butt welding process of not disintegrating and repairing, and if necessary, it can also be partially strengthened by dressing at the fracture. Special attention should be paid during the restoration process:

It is necessary to do a good job of preparation before welding, thoroughly remove the paint, sludge and other dirt impurities near the cracks or fractures of the girder, and make a groove at a certain angle on the inner and outer surfaces of the cracks or fractures under the condition that the weld does not bear the load (the original position before fracture); It is that there can be no load at the weld during welding, so as to prevent the residual stress and cracks at the weld, resulting in the re-fracture of the weld; It is necessary to keep the weld free shrinkage during welding.

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How to deal with cracks in car girders.

If there are cracks in the girder of the car, electric welding can be used, preferably protective welding, which has little impact on the surrounding structure. The thickness, shape and position of the plate should be designed according to the force of the main beam, the welded knot can not be completely welded, and the position of the solder joint has an impact on the force and structure. Cracks must be treated to prevent extension.

The car girder is actually a very important component, if there are cracks here, the best way is to replace him with a girder, otherwise he can be repaired with electric welding, but the effect is not the best.

Don't repair it, go change the girder, it's not safe to repair the car too fast.

Go to the repair shop to repair it, can you fix it yourself?

Small cracks on the beam, first of all, you have to see whether the crack is a crack in the surface plastering layer or a crack in the cast-in-place sorghum inside, if the cracks in the surface plastering layer are fine, the cast-in-place beam inside will generally not have cracks. If it is true that the cast-in-place sorghum has a large number of cracks, you can consider reinforcing it.

If there is a crack in the concrete girder itself, it needs to be filled in time, and in serious cases, it needs to be removed and re-poured, because the girder has a very important load-bearing role; If there are cracks in the outer layer of the surface decoration, then you only need to remove the putty powder and then repaint it.

1. If the concrete dries too quickly when it is not fully hardened, it usually leads to irregular cracks on the surface and shrinkage cracks of smaller widths.

2. Cracking of temperature changes. During the cement hardening process, the temperature difference between the concrete surface and the interior is large, resulting in rapid changes in the temperature of the concrete surface and causing the internal concrete to limit the large cooling shrinkage, which can lead to cracks.

It has nothing to do with safety, because there are steel bars bundled together, and the entire girder is poured with cement concrete, but the appearance is poor, and the cracks can be covered with plastering.

It's okay to have a small crack, but it's probably a few tenths of a millimeter, but it's possible that the concrete pouring construction may be a little cracky, or when it's white.

There are 1, small cracks are likely to occur in concrete pouring construction, and it is impossible to be very smooth, and 2. The large white mass is generally caused by condensation and shrinkage.

3. There are cracks on the surface of a large number of structures and if they are not specifically repaired when they are scraped, cracks will appear after a while.

Hello, has there been a crack treatment in the girder? Will it expand now? There are several such cracks in one beam of my house now, and I am so worried.

My house also has cracks, is the problem solved.

There are 2 ways to repair a broken car girder:

1. Replace the girder: In the process of replacement, you should pay attention to matching with your own model, although the cost of replacement is very high, but life is priceless.

2. Reset: The welding process is carried out directly at the broken or bent part of the girder, but the stains at the broken joint should be cleaned up in advance to prevent more serious re-damage after repair.

Causes of car girder breakage:

1. Material: Due to the unqualified material, the fracture of the car girder will occur, and the treatment of this reason can only be cured.

2. Overloading and speeding: This reason often occurs, and some drivers drive vehicles to overload and speed regardless of the danger to their lives.

The longitudinal beam is usually stamped with low-alloy steel plate, and the cross-sectional shape is generally grooved, and some are made into Z-shaped or box-shaped. Depending on the form of the car and the requirements of the structural arrangement, the longitudinal beam can be made in a curved position in the horizontal plane or in the longitudinal plane, as well as in an equal section or a non-equal section.

The beam is not only used to ensure the torsional stiffness of the frame and withstand longitudinal loads, but also to support the main components on the car. Usually the wagon has 5 or 6 beams, sometimes more. The structural characteristics of the side beam frame are convenient for the installation of the cab, the carriage and some special equipment and the arrangement of other assemblies, which is conducive to the modification of variable vehicles and the development of many varieties of vehicles, so it is widely used in cargo trucks and most special vehicles.

1. Improper construction operation makes the position of the negative reinforcement of the bearing fall, the protective layer of the reinforcement is too large, and the fixed bearing becomes a plastic hinge, which is easy to cause long cracks along the beam edge of the plate surface; 2. In the pouring process, the concrete tamping vibration is uneven, and the area of the repentance stove is missed, resulting in an undense area inside the beam and plate, and eventually causing cracks. 3. The thickness of the protective layer on the surface of the beam plate is not up to standard, which causes the steel bars in the beam plate to be easily corroded and the volume expansion occurs, which will induce the occurrence of longitudinal cracks in the beam plate.

First see if it is the main bearing part of the girder or the longitudinal beam. If so, the manufacturer is responsible, and the general vehicle girder should be warranted for life, of course, provided that there is no indiscriminate alteration or indiscriminate welding on the girder.

Find a professional repair girder maintenance, can not be welded on the girder, it is best to directly rivet and reinforce with rivets.

Dump truck girder has crack solution:

1. Welding, welding the cracks.

2. Replace the girder with a new one.

A dump truck is a vehicle that unloads cargo on its own by means of hydraulic or mechanical lifting. The compartment of the dump truck is divided into two kinds of backward tipping and lateral tipping, the piston rod movement is controlled by the control system, the backward tipping is more common, the piston rod is pushed to make the carriage overturn, and a few are double-way tipping.

No problem, there are so many cars in China, do they all sell scrap iron when the girder is broken?

Different models have different requirements for the package girder, I don't know what kind of car you are.

But before wrapping the girder, it has to be welded with a broken mouth.

Where are you?

1. Replace the girder: When replacing, you need to pay more attention to the matching with your own car model, although the replacement cost is relatively high.

2. Reset: Through the welding process, go directly to the place where the girder is broken or bent for treatment, and it is necessary to clean up the stains in advance to prevent more serious damage after repair.

3. Digging and repairing and welding: open a V-shaped groove in the disconnected place, cut off the same size material on the scrapped girder and then make a welding repair.

First, punch holes at both ends of the fracture to prevent crack expansion, then groove and weld and grind flat, and finally cover the fracture with a manganese steel plate of the same thickness, and then weld 100 200 mm on both sides of the weld.

That's pretty much it.

Large frame car, can repair weld a channel steel.