KR100422742B1 - Welding-device of rearwheel house components for automobile - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus for a rear wheel house part of an automobile, and includes a panel itself during welding of a wheel house inner panel, a rear floor panel, and a rear floor side member panel in a main buck jig process among automobile welding lines. By providing a welding device that uses the lower electrode, drills holes in the wheelhouse inner panel, the rear floor panel, and the rear floor side member panel, which are in close contact with each other, and performs welding in a state where the panel is brought into closer contact with the pin clamp. In the main buck jig process, the wheel house inner panel, the rear floor panel and the rear floor side member panel can be welded, thereby improving the body quality by improving the deflection of the body.

Description

Welding device for rear wheel house parts for automobiles

The present invention relates to an apparatus for welding a rear wheel house part of a vehicle, and more particularly, welding a wheel house inner panel, a rear floor panel, and a rear floor side member panel in a main buck jig process of a welding line of an automobile. Welding that uses the panel itself as a lower electrode, drills holes in the wheelhouse inner panel, the rear floor panel, and the rear floor side member panel which are in close contact with each other, and performs welding while bringing each panel closer to each other using a pin clamp. By providing the device, the wheelhouse inner panel, the rear floor panel and the rear floor side member panel can be welded in the main buck jig process, thereby improving the body quality by improving the deflection of the car body. A house part welding apparatus is related.

In general, automobiles construct a vehicle body by welding a plurality of sheet metal workpieces, and thus have many welding spots.

Welding in such a welding spot is conventionally performed by performing spot welding using an automated or manual welding gun.

In particular, in the main buck jig process of the automobile welding line, the work range is limited due to the interference of jigs and equipment during welding of the wheelhouse inner panel, the rear floor panel and the rear floor side member panel. Since welding is performed using the welding robot 100, the main buck jig process may cause sagging of the panel, thereby causing a poor welding.

Accordingly, the present invention has been made in view of the above-mentioned problems, and the wheelhouse inner panel which is in close contact with each other by using the panel itself as a lower electrode when welding the wheelhouse inner panel, the rear floor panel and the rear floor side member panel. Wheelhouse inner panel and rear floor panel in the main buck jig process by providing a welding device that drills holes in the rear floor panel and the rear floor side member panel and performs welding while keeping each panel closer by using pin clamps. And it is possible to weld the rear floor side member panel, thereby improving the vehicle body sag phenomenon to improve the body quality.

1 is a plan view showing an operating state of the welding apparatus for the rear wheel house part of a vehicle according to the present invention;

Figure 2 is a side view showing a rear wheel house welding device of the vehicle according to the present invention

Figure 3 is a side view showing a conventional spot welding robot

<Explanation of symbols for the main parts of the drawings>

10: welding device 11: body

12: forward and backward cylinder 13: pressurized cylinder

14: pin clamp 15: rod

16: upper electrode 17: rod

18: lower electrode 19: pin clamping hole

20a, 20b, 20c: Panel

Hereinafter, the features of the present invention for achieving the above object are as follows.

The apparatus for welding a rear wheel house part of a vehicle according to the present invention is largely equipped with a main body 11, forward and backward cylinders 12 mounted on the main body 11, and mounted on the main body 11. It consists of a pressurizing cylinder 13 arranged on both sides of the true cylinder 12, a pin clamp 14 and an upper electrode 16 attached to each cylinder. ), A pin clamp 14 is mounted, wherein the pin clamp 14 includes a wheelhouse inner panel (hereinafter referred to as panel 20a), a rear floor side member panel (hereinafter referred to as panel 20b) and a rear floor panel. (Hereinafter, referred to as panel 20c), which is inserted through the pin clamping hole 19, thereby compressing the panels 20a, 20b, and 20c. In addition, the pressure cylinder 13 The rod 17 of the upper electrode 16 is mounted, the upper electrode 16 at this time constitutes the lower electrode 18 It is is responsible for performing a welding on the panel with the panel (20a, 20b, 20c).

In particular, the forward and backward cylinder 12 is a cylinder forward and backward according to the operation of the solenoid device (not shown), the upper electrode 16 directly transfers the secondary welding power transmitted from the transformer directly to the workpiece (panel). It is an electrode.

In addition, the upper electrode 16 is made of a copper alloy electrode.

Hereinafter, the configuration of the present invention with reference to the accompanying drawings in detail.

1 is a plan view showing the operating state of the welding apparatus of the rear wheel house unit of the vehicle according to the present invention, Figure 2 is a side view showing the welding apparatus of the rear wheel house unit of the vehicle according to the present invention.

Here, reference numeral 10 denotes a welding apparatus replacing a spot welding robot whose working range is limited due to the interference of existing jigs and equipment.

The entire assembly of the welding apparatus 10 is a very complicated equipment including an array of various electric wires and a welding transformer, a timer, a contactor, and the like.

Thus, reducing the use and location of use of the equipment has an improved effect on performing weld assembly operations.

The welding device 10 is equipped with a forward and backward cylinder 12 on the main body 11, the pressure cylinder 13 is provided on both sides of the forward and backward cylinder 12, the forward and backward cylinder 12 The pin 15 is attached to the rod 15 of the rod, and the tip 17 for the welding electrode, that is, the upper electrode 16 having the tip-shaped end, is attached to the rod 17 of the pressure cylinder 13. Consists of a mounted structure.

At this time, the forward and backward cylinder 12 is operated in accordance with the operation of the solenoid device pin pin 14 is mounted on the rod 15 of the pin clamping holes (20a, 20b, 20c) formed in the panel ( After insertion into the inside through 19), it is again pulled in the reverse direction to allow the pin clamp 14 to squeeze the panels 20a, 20b, and 20c. Here, the pin clamp 14 is a vehicle body. In the assembly line (welding line) can be used to clamp the body transport carts, can be used, and inserted into the inside of the panel (20a, 20b, 20c) through the pin clamping hole 19, The hook (not shown) is made to be clamped to the edge of the pin clamping hole 19 as it is opened, that is to be hooked.

In addition, the upper electrode 16, which is made of the copper alloy electrode, serves to directly transfer the secondary welding power transmitted from the transformer to the panels 20a, 20b, and 20c. It is connected.

Next, the operation principle of the present invention having such a configuration will be described.

When the PLC (not shown) receives the seating signals of the panels 20a, 20b, and 20c to be welded, and the solenoid device is turned on, the back and forth cylinders 12 are actuated and the pin clamps 14 mounted on the rods 15 are turned on. ) Is advanced.

Subsequently, after passing the pin clamp 14 through the pin clamping hole 19 previously formed in the panels 20a, 20b, and 20c, the pin clamp 14 is clamped and then moved back and forth to the cylinder 12 again. In reverse operation, the panels 20a, 20b, and 20c can be held in a compressed state by the force that the pin clamp 14 clamped to the panel 20c pulls in the reverse direction.

Subsequently, the pressure cylinder 13 is operated to bring the upper electrode 16 into close contact with the panel 20a.

Subsequently, welding is performed when the rearmost panel 20c of the panels 20a, 20b, and 20c is used as the lower electrode 18, and power is supplied by operating the power supply device. That is, the upper electrode 16 ) And the lower electrode 18 are energized, and welding is performed. The arrow direction of FIG. 1 shows the energization path at this time.

After completion of the welding spot welding, the pin clamp 14 is released (unclamped), and the forward and backward cylinders 12 and the pressure cylinders 13 are operated to return the welding device 10 to the initial position.

As described above, the welding apparatus for the rear wheel house part of the vehicle according to the present invention uses the panel itself as a lower electrode when welding the wheel house inner panel, the rear floor panel and the rear floor side member panel, and is in close contact with each other. The wheelhouse inner panel in the main buck jig process by providing a welding device that drills holes in the wheelhouse inner panel, the rear floor panel and the rear floor side member panel, and performs welding while bringing each panel closer to each other using a pin clamp. In addition, the rear floor panel and the rear floor side member panel may be welded, and thus, there is an advantage of improving the vehicle body quality by improving the deflection of the vehicle body.

Claims (3)

The front and rear cylinders 12 mounted on the main body 11 and the front and rear cylinders 12 are disposed on both sides of the main body 11, and the rod 17 has an upper electrode 16 on the rod 17. The panel 20a, 20b, 20c is mounted on the pressure cylinder 13 and the rod 15 of the forward and backward cylinders 12 and penetrates through the pin clamping holes 19 on the panels 20a, 20b, 20c. It is composed of a pin clamp 14 for crimping, the rear wheel house part of the vehicle, characterized in that the panel 20c as the lower electrode 18 to conduct electricity to the upper electrode 16 to perform welding Welding device. delete 2. The apparatus of claim 1, wherein the upper electrode is made of a copper alloy electrode.