The tool for the car’s extractor with your own hands

Removing Dents on a Vehicle with a Backhammer

Dent repair with a reverse hammer, when the driver has limited access to the damaged area, or the parts to be repaired cannot be removed. This type of body dent repair usually requires subsequent painting of the restored part. Perform the following steps to straighten a dent:

  • Clean, dry and degrease the restorable surface. Remove traces of corrosion.
  • One end of the reverse hammer attached to the center of the damage. Perform the operation with the help of a special suction cup, or applicator.
  • Perform the straightening by gradually increasing blows of the weight on the handle of the hammer.
  • When the repair of the exterior of the body is complete, the hammer is disconnected.

The applicator or suction cup is only effective in straightening the bodywork if the damage is not too severe. In the presence of deep and complex defects, the hammer is welded to the surface, or clung to the technological holes with special hooks.

Types of dents

The first step is to determine the type of deformation. These damages vary in size. So, the damage is considered deep, the depth of which is 10 millimeters or more. Often these dents do not have a clear oval shape.

Such defects can not be repaired by themselves. Shallow damage. these are defects where the deflection of the metal is no more than 5 millimeters, and on the surface of the paintwork there is no damage. This defect can already be removed with your own hands at home or in the garage conditions.

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Clearances

After all the bodywork components have been stretched and any damaged parts that cannot be repaired have been replaced, the front panels are adjusted. When all power members are properly stretched and all mountings are in place, all body panel clearances should be even and the same on both sides of the vehicle.

All doors, hood, and trunk lid should close without significant effort and not catch on neighboring body panels. Read about how to adjust the gaps on your car here.

Unevenness of gaps may show, what and where is understretched or overstretched. The gaps, therefore, provide information on whether the body is properly pulled.

To summarize, we can say that in the presence of the necessary, not the most expensive tools and devices, as well as knowledge and experience can pull complex damage to the body of the car even in the conditions of the garage workshop. Experience is of course very important. If you are not experienced enough, it is better to start pulling accident bodies that have small displacements of force elements.

tool, your, hands

Repairing damaged body panels requires no less skill. Having mastered basic straightening techniques, it is possible to straighten rather complicated damages. Read about how to straighten dents with a straightening hammer, support and body iron in another article.

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Bodywork straightening is a very complicated process, usually performed after an accident, when all distortions of the car body geometry are eliminated by applying the opposite force as received during the accident.

Measuring the “geometry” of the body

To understand where and how much the body’s power elements have shifted, various measuring systems are used to measure geometric parameters.

Most often, in the conditions of garage workshops and small car repair shops, rulers are used to measure body geometry, as well as simple tape measures.

A tape measure is not always easy to use, because there may be various obstacles (especially in the engine compartment) in the path of the two points between which you want to measure the distance. The measurement bar allows measurements to be made quite easily (see “Tirometer Overview” on page 16). article on measuring body geometry).

It is important to check the diagonals of the shock absorber cups and the mounting points of the suspension to the body. This will affect how you set the camber on your wheels.

Hydraulic suspensions

Hydraulic tensioners are used for extrusion techniques in bodywork. There are a variety of hydraulic tensioners, giving varying forces from 4 tons and up. An example of the use of this device is pulling the body side struts by squeezing from the inside of the cabin. You can straighten sideways-moving spars. Also, straightening deformed door openings and windshield and rear window openings. Usually bodybuilders buy a set that includes several types of extensions of different lengths, nozzles, the extension itself and the hydraulic pump, but you can buy each item separately.

Paintless dent removal tool

Homemade device for removing dents without painting on the car body: photo of the device, description of making, as well as a video, which shows how to pull dents with your own hands.

When the car body is damaged by small dents, you have to turn to a tinsmith, but if you make this simple device, you can pull out dents without painting yourself.

The frame is made of plywood, fasteners on self-tapping screws and corners.

Mushroom adapter. bayonet type air fitting.

installed in the quick disconnect 6mm herringbone, a stud repair carburetor cap (on the one hand m5 with another m6) m5 inside the quick disconnect and screwed nut m5 with beveled not many sides.

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The rod is made from a stud m6, connected to the adapter connector m6 (I have not found in my village, had to weld nuts) at the top should be a wingnut m6.

Soft base. cut from an old construction grinder (grind), but can be any rubber or isolon 8 mm Mushrooms. foam mounting mushrooms (preferably as few holes and harder) cut to the right shape, screw 5m40 washers, nuts.

The attachment really works and removes dents, tried large and small dents, the ribs can all be lifted! Tried it on the painted and not painted, but on the spray-painted fender glue ripped off the paint!

Picture shows the process of dent pulling on the car body.

The hot mushroom is glued on the degreased surface of the dent with hot melt glue.

By rotating a wingnut pulls glued mushroom together with metal.

See the video, where the author shows in detail how to use self-made device for dent removal on the car body.

Technology of execution

The geometry of the body is restored by means of a frame. The latter refers to devices acting on the principle of hydromechanics. Rapel work has some peculiar features:

  • The machine can stretch the body in all three directions simultaneously. Even the most hopeless deformations can be repaired.
  • Requires physical effort and dexterity. This operation is not possible at home.
  • High precision requirements are expected. The slightest errors lead to a violation of the aerodynamic indicators of the car, which is fraught with loss of steering.

Some work on the slipway takes several days. it depends on the nature of the damage. But when the equipment is supervised by experienced craftsmen, the result will not keep you waiting. Staple work is quality and an indicator of a modern approach. They have replaced the team of tinsmiths who used to pull the bodies of cars for weeks or even months, armed with primitive tools.

Introduction of the slipway made a new look at restoration of body geometry. Even in the most complex cases, the process takes a few days, rarely up to a week. In this case, the cost of the work is the actual investment in the car. It is transformed after the professional bodywork.

But more importantly, the staple work associated with the bodywork protects the tires and suspension from rapid deterioration in the long term. This factor directly affects the drivability of the car. But this positive result is only realistic if they are performed by professionals. And they are ready to put them at your disposal.

Our service station is characterized not only by the presence of the slipway. When restoring body geometry we use specialized benches. We have special rulers and other necessary measuring equipment. Its use makes it possible to carry out qualitative car body repair with observance of all exact indicators.

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surface cleanup

Used a well-known tool for scraping. “angle grinder”. With a coarse abrasive wheel R-80 were processed all sills and all arches after welding works, as well as the place of pulling unevenness. Besides, two places having obvious rust. on the door and at the place of rear plastic bumper fastening. were processed with the same sandpaper.

All the rest surface of the car was processed with abrasive paper P220. In places where the surface cannot be cleaned with these tools, we clean them by hand.

Smoothing with a reverse action tool

This method can be roughly divided into two types. The first is that a vacuum tool is used for the work, while the second type involves the use of a reverse hammer. Both methods work on a similar principle, and you can understand the procedure by watching a video on this topic.

The technology of straightening with a vacuum tool is as follows. A suction cup tool is attached to the damaged area of metal and the physical effort is used to pull the dent back to its normal position.

This method is often used in cases where the place of damage left intact paint coating, as pulling with suction cups allows you to save paint and avoid cosmetic repairs.

If a reverse hammer is used, painting work cannot be avoided. The technology of pulling the dent with this method is as follows. hooks of wire are welded to the damaged area, a reverse hammer is connected to them, and the metal is pulled to its normal position with percussive forces. After that the hooks are cut off, and the body is polished and painted.

Another way to pull out the dent with a reverse hammer is to drill a hole. The threaded tip of the tool is inserted into this hole, and the other side is equipped with a washer and a nut. After the hole is leveled, it’s putty or welded in place. It should be noted that this method will be difficult to perform when there is no access to the place of damage on both sides. All of these techniques require caution and some experience, so you should watch a few videos with different variations of this kind of straightening beforehand.

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