Method and apparatus for repairing the chassis and or bodywork o

Metal working – Method of mechanical manufacture – Structural member making

Patent

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Details

294071, 29464, 33608, B23Q 1700, B23Q 300, G01D 2100

Patent

active

058843990

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to a method and to apparatus for repairing the chassis and/or the bodywork of damaged automotive vehicles and then particularly for making repairs which require the replacement of damaged vehicle parts with new parts.
When fitting a new part adjacent an undamaged or truly aligned part of a vehicle which has been partially demolished as a result of an accident for instance, or when replacing rust-damaged parts, the final result is totally dependent on the new part being held in precisely the correct position in relation to the remainder of the vehicle when fitting said part, for instance when welding the part in place.
Data sheets which define the positions of the different points of the chassis and/or the bodywork of car in a space coordinate system are available for the majority of makes of private vehicles. The measurement points used may have the form of holes, flat surface parts, pins or equivalent devices.
A damaged vehicle is aligned by clamping the vehicle onto a drawing or aligning bench. The bench includes measuring equipment which can be moved along the bench. The measuring equipment is used initially to measure or determine the locations of from three to five undamaged points of the car, so as to define the position of the car accurately and precisely in relation to the measuring equipment. The car is then aligned, for instance by a pulling action, until remaining measuring points on the car coincide with corresponding values on the data sheet.
When welding a new part to a car in replacement for a removed part, it is known to clamp the new part in its correct position in space while using reference points on the part. The replacement part is held by holding devices which can be clamped firmly to the aligning bench and which consists in a large number of component parts that can be assembled together and the dimensions and angles of which are known. When wishing to position, for instance, a pin in a correct position in space for coaction with a reference hole on a new car part, there is chosen from a kit of fixed component parts those parts which when combined and fitted in a chosen position on the aligning bench will result in an external pin being located in the desired position.
However, if the component parts have not been manufactured with any great precision or have been damaged or have become worn, the individual discrepancies of each separate component part are likely to add together so that the final position of the external pin will be totally wrong.
It is also difficult to carry out quality checks, since such checks require the inspection of each separate detail of the entire fixture set-up.
Adjustable holders provided with scales or holes have also been used earlier, although such devices give the same uncertain results as those described above.
The main object of the present invention is to provide a method of the kind defined in the introduction which can be applied readily and which eliminates the aforesaid drawbacks and which will also produce a result of high quality which is not impaired with time.
The invention is based on the realization that this object can be achieved when instead of a large number of fixed components, there is used a few components which can be adjusted in different respects and therewith adjust the position of the final element which coacts with, e.g., a new chassis part with the aid of separate measuring equipment of the same kind as that used when aligning the chassis of a car.
Thus, the present invention provides a method of repairing a vehicle chassis and/or vehicle bodywork in which damaged parts are replaced with new parts, wherein the vehicle is clamped securely to a working bench and a new vehicle part to be fitted, for instance to be welded, is held firmly in a correct position relative to the vehicle with the aid of bench coacting holding devices which can be locked in relation to the bench and which include positionally adjustable means for coaction with specific points on the new vehicle part, the positions of thes

REFERENCES:
patent: 4165567 (1979-08-01), Olsson
patent: 4275872 (1981-06-01), Mullis
patent: 4891889 (1990-01-01), Tomelleri
patent: 5131257 (1992-07-01), Mingardi
patent: 5148377 (1992-09-01), McDonald
patent: 5341575 (1994-08-01), Chisum
patent: 5644854 (1997-07-01), Bergeron

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