(4) distortion (FIG. 26)
26
When such deformation occurs, the height of the beam will change significantly, this makes the level of deformed stringer left and right sides, respectively. Compared with the standard value, the front or rear side of the side member deformed downward vertically if, on the other side of the side frame will deform vertically upward. Using the central gauge can easily verify the damage, beam distortion will become a shape similar to the shape of aircraft propellers.
(5) rhomboidity (FIG. 27)
27
When such a deformation, the diagonal girders block size and shape will change significantly, which will result in deformation of the entire parallel beam. Due to the large trucks trapezoidal girders stringers relatively straight, this will lead to rhomboidity standard, but if it is the Land Cruiser (Land Cruise) models, because of its eccentric stringer type, girder will be accompanied by the simultaneous deformation of the diamond distortion or lateral bending.
beam correction
and the basic operating procedures for the correction of the vehicle body, the body and the beam-type monolithic body identical, i.e. in the measurement and visual damage is determined based on the correction table is then irradiated with beam correction, and replacement parts can not be repaired. To verify the type of deformation of the beam and to check the degree of deformation accurately grasp the extent of the damage, must the relevant dimension measurement gauge, and visually. While the form of damage is different from the beam-body monolithic body, but the beam dimension measurement method and analysis method for the measurement result of identical unitary body, and characteristics of the type of injury beam type body of already before lecture ldquo; beam distortion and dimensional rdquo; article introduced.
Since there is no beam rocker panel skirt monolithic body, so it is necessary to wants to use a fixed beam special tools and methods, but the basic method and the method for fastening the monolithic body of the same, i.e., by hydraulic cylinder and chain fixed support body and close the lock, fixed beam method will be explained later in the article. Because the beam is made of a very thick metal material, trying to pull beam, in addition to conventional drawing tool and method of operation, theYou must also use a hydraulic cylinder to help pull. As a conventional drawing method, ldquo; simultaneous multidirectional drawing operation rdquo; will be employed during the drawing of the beam-body, which is the same unibody drawing operation.
If you want to change the beam member, and components in the form of a welding method is different from the unitary body member. However, follow the standard size is correctly positioned and firmly welded part, etc., requires the same monolithic body. (Continued)
(Qiu Lin)