Auto Body Repair Tool Design and Application

 

BYD Auto Co., Ltd., Xi'an 710119

 

Abstract: The analysis of an automobile sheet metal repair tool features designed repair tool spherical head, levers, rings and handle structure, confirmed by the use of the tool, improve production efficiency and ensure the quality of repair.

 

Keywords: spherical head lever handle rings

 

CLC: TH122; TG703 Document code: B Article ID :1000 -4998 (2012) 05-0097-02

 

Automotive sheet metal car body repair tool is quick fix after local deformation tool, it is simple, convenient and practical, the casing can be made without removing the case of automotive quick fix to their original state, improve work efficiency, reduce labor intensity .

 

A working principle and structure and composition

 

Auto Body Repair tool shown in Figure 1, including a spherical head, levers, rings and handles four parts, it works as a spherical head, lever, turn the handle fixed connection, leveraged through the rings, spherical head, face and the top in sheet metal shell protruding parts of the body below, rings with a diameter of 3 mm wire rope just hanging up, one hand holding the rings, and the other hand holding the handle lever repeatedly press down gently, punch deformation parts can be quickly repaired.

 

Two main parts of the features and design

 

2.1 spherical head design and processing requirements

 

Figure 2 shows the shape of the spherical head for the ball short, in order to facilitate the replacement of symmetry on both sides of the center line of the spherical head processed into two small countertop, perpendicular to the center of the ball missing the lower open end threaded holes. To ensure practicality, materials used tool steel T10, is designed for the spherical head surface roughness Ra0.8 μm, fine sand and polish after roughing obtained processing to ensure that the ball short axis perpendicular to the ball missing end, threaded holes face perpendicular to the ball missing.

 

2.2 Design and processing requirements rings

 

Figure 3 shows a round cake rings designed shape, thickness t is 10 mm, center hole whichever is 12.5 mm, a distance from the center hole machining standard 6 mm holes. To improve the service life of the material with 45 steel, the hardness after heat treatment is 40 ~ 45 HRC.

 

2.3 Design and processing requirements lever

 

Figure 4 shows a quasi 12 mm rod lever, materials for 1Cr18Ni9, front-end processing into external thread, threaded ends from about 300 mm up to 150 ° bending angle, the other end of the lever processed into symmetrical sides stepped shaft, about 50 mm from the end portion.

 

2.4 handle structure design and processing requirements

 

Handle structure (Figure 5) is automobile sheet metal repair tool grip portion, the handle is cylindrical knurled outer peripheral surface, the head of the threaded hole and communicating with the side hole, the vertical centerline of the handle side of a through-hole. An externally threaded nut head, tail diameter and the same diameter and knurled handle the material with 45 steel, quenched and tempered hardness of 28 ~ 32 HRC, to increase the appearance, chrome plated.

 

3 assembly and Precautions

 

Spherical head screw thread of the head of the lever on the front end, to prevent loosening during use spherical head, the head of the screw plus front lever spring washers, rings set in the center hole of the lever, the lever can slide back and forth in the center hole rings. Hole cover on the lever handle side steps rear shaft stepped shaft hole with the handle on the side of the transition with the locking nut threaded hole in the handle of the head lock lever will not cause rotation and sliding off. This tool is usually in a dark room, with the use of better under fluorescent light, fluorescent light needs repair automotive sheet metal shell surface area, through the shell surface of the light reflex concave areas can be seen relatively dark, mounted on the lever The role of the car shell spherical head, face the inner surface of the fulcrum effect in active connection rings on the left hand holding the lever and fulcrum rings at the right hand holding the lever handle down gently force, release the lever handle, repeatedly, Finally do not see a dark car sheet metal shell surface pits, then automotive sheet metal casing repaired.

 

4 Conclusion

 

The practical application tool after many improvements, the structure is simple, easy to use, fast, safe, effort, both to improve work efficiency, but also ensures the quality of repair, automotive sheet metal casing to avoid damage, according to the actual situation of different the length of the lever and the different diameter spherical head, making the car body sheet metal to achieve the best effect visual quality, suitable for many auto repair shops use.