WARNING: It is not recommended to use heat when stretching to straighten body panels (such as side members). Longitudinal stretching (hot or cold) is also not recommended. Minor use of lateral stretching (at a right angle to the longitudinal axis of the car in one direction or another), (cold) is allowed.
When performing any type of pulling or straightening, it is important to watch for movement of adjacent panels.
The panel must maintain its strength and integrity; if there is the slightest doubt about this, the panel should be replaced.
Straightening repairs are often required to restore the original shape of the body after a collision. This can be done using:
- Straightening bench.
- Universal straightening and measuring stand.
- Welding stand.
To ensure that the repair is carried out professionally and that all dimensions are correct after the repair is completed, the following points must be taken into account.
Structure:
- The repair sequence depends on the individual repair plan (taking into account any necessary disassembly work).
- Clean the attachment areas.
- Secure the vehicle to a suitable stand so as not to create stress in it.
- Support the units to relieve stress on the body.
- Select at least three measuring/reference points that are undamaged and located as far apart as possible (for basic adjustment).
- Check dimensions against measuring/reference points.
Editing
NOTE: Check dimensions and clearances continuously during the process of eliminating deformations.
The body is always straightened in the direction opposite to the impact direction. Always straighten the body when it is fully assembled (do not cut out any elements in advance). Straighten in several stages. This eliminates the risk of overtightening panels or breaking welds. At each individual stage of straightening, use blows from an aluminum hammer to relieve stress from parts subject to tensile load (in the area of previously identified deformations, dents, welds, etc.).
Specific features: Due to its brittleness, ultra-strong steel cannot be straightened and products made from it must be replaced.
[The source of the article is located on the website: LRman.ru]
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