CN101856777B - Moveable pin device and method using the same to weld vehicle body - Google Patents

Abstract

The invention relates to a moveable pin device and a method using the same to weld a vehicle body in order to achieve the rapid processes of welding and locating and facilitate the welding process. The technical scheme of the invention is as follows: a shoulder is arranged at the lower part of the moveable pin and located inside the base of the moveable pin; a moveable clearance is left between the outer side of the shoulder and the inner wall of the base of the moveable pin; and for the shoulder of the moveable pin is capable of freely rotating in the base of the moveable pin, the end part of the moveable pin can enter a hole on the vehicle body for welding and locating, particularly, a nut can be welded by placing the nut to be welded on the moveable pin.

Description

A method for body welding using movable pin device

technical field

The invention relates to a method for welding a vehicle body using a movable pin device.

Background technique

In the automobile welding process, the position and accuracy of the holes are very high, but some parts cannot guarantee the position and accuracy of the holes due to the stamping process, which has a certain degree of influence on the welding quality of the car body.

In the prior art, such as the technical solution disclosed in the patent (Patent No.: 200620092880) entitled "Positioning Device in Body-in-white Welding Tooling", the welding positioning adopts fixed pins. As shown in Figure 2, fixed pins are used for welding positioning. If the hole diameter of the vehicle body is slightly deformed, the pins and holes may not match, especially in mass production, which will also affect production efficiency; The position and precision of the holes are very high. Therefore, in the design process, the punching holes on the car body are required to have very accurate position and precision, which increases the difficulty of design, and even increases the process content of the mold, thereby increasing the manufacturing cost of the mold. .

Contents of the invention

The object of the present invention is to provide a method for welding a vehicle body using a movable pin device, which can quickly realize welding positioning and facilitate welding.

The technical scheme that realizes the object of the present invention:

A method for welding a vehicle body using a movable pin device. The movable pin device includes a movable pin and a movable pin base. The lower part of the movable pin is provided with a shoulder. There is a movable gap between the inner walls, and the movable pin shoulder can rotate freely in the movable pin base. Carry out welding positioning in the hole, put the nut to be welded on the movable pin, and weld the nut.

The size range of the movable gap between the outer side of the movable pin shoulder and the inner wall of the movable pin base is 0.5mm-1.5mm.

The lower part of the movable pin base is connected with a movable pin fixing plate seat.

The beneficial effect that the present invention has:

Since the lower part of the movable pin of the present invention is provided with a shoulder, and the shoulder can rotate freely in the movable pin base, therefore, the movable pin can be quickly aligned with the hole position on the vehicle body to realize welding positioning, thereby facilitating welding and effectively improving Production efficiency, guaranteed accuracy of weld nuts and mounting holes. At the same time, since the movable pin of the present invention can be quickly aligned with the holes on the vehicle body through free rotation, there is no need for excessive technical requirements on the position and accuracy of the vehicle body holes, which greatly reduces the difficulty of the body stamping process, thereby reducing the Cost of production.

Description of drawings

Fig. 1 is the structural representation of movable pin device of the present invention;

Fig. 2 is a schematic structural diagram of a fixing pin in the prior art.

Detailed ways

As shown in Figure 1, the lower part of the movable pin 2 is provided with a shoulder, which is located in the movable pin base 3, and there is a movable gap between the outer side of the shoulder and the inner wall of the movable pin base, and the movable pin shoulder can be moved Free rotation in the pin base. The size range of the movable gap between the outer side of the movable pin shoulder and the inner wall of the movable pin base is 0.5mm-1.5mm. In this embodiment, the movable gap size is 0.8mm. The bottom of movable pin base 3 is connected with movable pin fixed plate seat 1.

Use the free rotation of the movable pin shoulder in the movable pin base to automatically align the movable pin to the hole position of the vehicle body. The end of the movable pin passes through the hole on the vehicle body for welding positioning, and the nut to be welded is placed in the movable On the pin, weld the nut.

In another preferred embodiment of the present invention, the size of the movable gap between the outer side of the movable pin shoulder and the inner wall of the movable pin base is 1.2 mm.

Claims (3)

1. method of utilizing the removable pin device to carry out automobile body welding; The removable pin device comprises removable pin, removable pin pedestal, and the removable pin bottom is provided with convex shoulder, and this convex shoulder is positioned at the removable pin pedestal; Leave the free gap between the convex shoulder outside and the removable pin base internal wall; The removable pin convex shoulder can freely rotate in the removable pin pedestal, it is characterized in that: utilize removable pin convex shoulder rotating freely in the removable pin pedestal, the location is welded in the hole that the removable pin end is passed on the vehicle body; The nut of need welding is put on the removable pin, nut is welded.

2. the method for utilizing the removable pin device to carry out automobile body welding according to claim 1 is characterized in that: the free gap size range between the removable pin convex shoulder outside and the removable pin base internal wall is 0.2mm-0.5mm.

3. the method for utilizing the removable pin device to carry out automobile body welding according to claim 2 is characterized in that: removable pin pedestal bottom is connected to fixedly panel seat of removable pin.

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