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2003-02-24Autorobot B20 – new technology for car body repair Uutinen

Autorobot Finland has developed a new straightening bench for the new, strong cars. The straightening bench has a hydraulic straightening table with a pulling tower that operates with new pull/push technique. The most significant advantages of the hydraulic straightening table are the quick adjustment of the chassis fasteners lengthwise, hydraulic transfer of the straightening tower to the target and extending the straightening table so that the same double acting cylinder will work in straightening after the bench has been adjusted. The new pull/push technique speeds up the straightening process and provides a possibility to repair the strong body structures economically. Autorobot Finland has developed a new straightening bench for the new, strong cars. The straightening bench has a hydraulic straightening table with a pulling tower that operates with new pull/push technique. The most significant advantages of the hydraulic straightening table are the quick adjustment of the chassis fasteners lengthwise, hydraulic transfer of the straightening tower to the target and extending the straightening table so that the same double acting cylinder will work in straightening after the bench has been adjusted. The new pull/push technique speeds up the straightening process and provides a possibility to repair the strong body structures economically.

The new straightening bench is called Autorobot B20 and two separate patents have been applied for it. B20 is equipped with two lifting cylinders and it lifts a 4 t car to about 1,6 m height. B20 can be used for handling all cars, jeeps and vans (max length of the car 6,5 m) thanks to the high lifting capacity and the hydraulically adjustable straightening table.

The pulling tower of B20 contains double action hydraulics. The pulling action of the cylinder makes the 1 - 2 support arms of the tower keep in place and supports the area of the body which shouldn’t move or be displaced during the straightening. The pulling action is locked and after this the ram is changed into the push action, which in turn does the actual straightening with the chain going through the pulling wheels. New and special with this pull/push straightening technique is that the extensive straightening powers needed for the new body materials do not affect the undamaged areas of the car but only the damage zone. This means that the damage itself gets straightened more easily and also that the straightening force needed for the repair isn’t directed to the vehicle mounting points and so will not damage them.

An intense pulling force can be obtained with the B20 pulling tower by using a double pull for example at the end of the car frame so that pull grippers are installed in both lower and upper edges of the frame. This divides the pulling power in several sections, and prevents the frame edges from breaking which often happens if maximum pull effort is focused to one pulling point, for example to the gripper. Another specialty of the straightening tower of B20 is that it gives the same pulling force in all points along the height of the tower. Thus it provides sufficient pull power also at the structurally reinforced middle areas of the new, strong cars.

The specialties of the tower of B20 also include the new overhead tower structure in which the tower turns steplessly in the horizontal plane and which can be turned in three different positions in the height direction. With these properties the necessary pulls upward can be done easily. In its upward position the height of the tower is also enough for straightening the roof structures of the raised vans.

B20i.jpg (92 kB)

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