JPS6146779A - Assembling method of engine compartment - Google Patents

Abstract

PURPOSE:To find satisfaction in the positional accuracy required for each function part, by positioning plural members separately in an assembling jig installed in one of stages in an engine compartment assembling line, while welding them together simultaneously. CONSTITUTION:Each of engine compartment constituent parts such as a hood- ridge assembly 1, a front side member 2, a radiator core support 4, a cross member 5 and dash lower 7 is taken into an assembling jig in keeping them a single unit intact each, and respective function parts are positioned right and locked. In succession, joining parts between each of constituent parts are welded together at the same time with a welding gun and thus an engine compartment is assembled.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for assembling an engine compartment of a motor vehicle body.

(Prior Art) When assembling the engine compartment of an automobile body, conventionally, as shown in FIG. The figure shows only one side hood ridge and front side member), radiator core support and cross member 6, which is a pre-assembled version of radiator core support 4 and cross member 5, and darts lower 7. , are positioned and fixed in an assembly jig provided at one stage of the engine compartment assembly line, and their joints are welded together to assemble them into the engine compartment 8 as shown in Fig. 7. Ta.

(Problems with the Prior Art) However, in such a conventional engine compartment assembly method, the hood ridge assembly 1 and the front side member 2 are pre-assembled to the hood ridge and front side member 3, and , the radiator core support 4 and cross member 5 were pre-assembled into the radiator core support and cross member 6 and then joined to the darts lower 7, so after being joined and assembled into the engine compartment 8. The positional accuracy of each functional part of the hood ridge assembly 1, front side member 2, radiator core support 4, and cross member 5, i.e., the front fender attachment part, front axle attachment part, headlamp attachment part, bumper attachment part, etc. , will depend on the accuracy of pre-assembly. As a result, for example, if the pre-assembly accuracy of the hood ridge and front side member 3 is incorrect, if the positional accuracy of the functional parts of the hood ridge assembly 1 is made accurate, the front side member 2
The positional accuracy of the functional parts of the system may be lost, and vice versa. Furthermore, radiator core support and
Even in the cross member 6, a similar deviation in positional accuracy occurs between the radiator core support 4 and the cross member 5, so it is necessary to satisfy all positional accuracy required for each functional part of the engine compartment component. This poses a problem in that it is difficult to process, requires correction work in post-processing, and increases costs.

(Means and effects for solving the problem) The present invention has been made by focusing on the above-mentioned problems of the conventional art. The above problems are solved by an engine compartment assembly method in which the functional parts of the assembly, radiator core support, darts lower, cross member, and front side member are positioned and fixed separately, and then welded together and assembled into the engine compartment at the same time. It is something to do.

(Example) Hereinafter, the present invention will be explained based on the drawings. Unpreassembled hood ridge assembly 1 as shown in Figure 1
, front side member 2 (only one side of the hood ridge assembly and front side member are shown), radiator core support 4, cross member 5
, each of the engine compartment components of the Datsushiroa 7 is sequentially transferred as a single unit to an assembly jig 10, for example, as shown in FIG. Bring it in. The assembly jig 10 includes a clamp gauge having a gauge surface shaped to match the shape of a predetermined positioning part including a functional part of each component, and a clamp gauge that opens and closes by being driven by an air cylinder to position a predetermined positioning part of each component. A clamp device is provided that has clamp claws that cooperate with the gauge surface of the clamp gauge to clamp and position and fix each component to a predetermined portion of the assembly jig 10. In Fig. 3, these clamp devices a, b, C...
...The positioning locations of each component by x, y, and z, and the main welding joint locations between the five components are shown. In the figure, W is a tip of a welding gun indicating a welding joint site.

Also, in Fig. 4, among the positioning parts shown in Fig. 3, the main ones A, B, C...F, G clamp gauges 2, K2, K1, K ini 5... . . . and clamp claws N1, N2, N3, N-K5, . . . are shown. First, the hood ridge assembly 1 is placed in a predetermined position of the assembly jig 10 in a state in which it is not in its normal state but in an outwardly tilted state, and the functional part is accurately positioned and fixed by the clamp device. The hood ridge assembly 1 positioning portion of the assembly jig 10 is designed to allow the hood ridge assembly 1 to be raised and lowered with the hood ridge assembly 1 positioned and fixed, and the hood ridge assembly 1 to be assembled to other components. Next, the front side member 2 is fixed to a predetermined part of the assembly jig 10 with its functional part accurately positioned. Thereafter, the earlier hood ridge assembly 1 is raised to the proper assembly position, and then the dart lower 7 and radiator core support 4 are assembled using the assembly jig 1.
To accurately position and fix each functional part to a predetermined part of 0. Subsequently, after positioning and fixing the cross member 5 to the assembly jig 10 in the same manner, the joint parts between the respective component parts are simultaneously welded using a welding gun and assembled into the engine compartment 8. After this welding is completed, the engine compartment 8 is transported to the next stage by a transport device such as a shuttle bar (not shown), and additional welding is performed to complete the assembly.

Note that only the radiator core support 4 and cross member 5 can be pre-assembled in the engine compartment 8.
There is no significant effect on the positional accuracy of functional parts after assembly.

Furthermore, as shown in FIG. 5, by extending the closing plate 12 of the front side member 2 upward, it is possible to improve the assembly accuracy of the front side member 2 and the hood ridge assembly 1, and furthermore, it is possible to improve the assembly accuracy of the front side member 2 and the hood ridge assembly 1. By providing the joint member machining 3 at the joint portion of the member 5 with the radiator core support 4, the accuracy of assembling the cross member 5 and the radiator core support 4 can be improved.

(Effects of the Invention) As described above, according to the present invention, a hood ridge assembly, a radiator core support, a dart lower, a cross member, and a front side member are mounted on an assembly jig provided at one stage of an engine compartment assembly line. It is possible to provide an assembly method in which each functional part is positioned and fixed separately, and then welded and joined at the same time to assemble it into the engine compartment. All positional accuracy required for each functional part of the member can be satisfied. As a result, there is no need for correction work in post-processes, and the cost of the product can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of each engine compartment component used in carrying out the method of assembling an engine compartment according to the present invention, and FIG. FIG. 3 is a front view of one embodiment of the tool, and FIG. 3 is an explanatory diagram showing the clamping device provided in the engine compartment assembly jig of FIG. 4 (A) to (G) are explanatory diagrams showing the states of the clamp gauge and clamp claw when the main clamping device shown in FIG. 3 is in the clamped state, and FIG. 5 is an illustration of the engine compartment according to the present invention. Figure 6 is a perspective view of a single engine compartment component that is different from that shown in Figure 1 used in the implementation of the conventional engine compartment assembly method. FIG. 7 is a perspective view of the assembled engine compartment; FIG. 7 is a perspective view of the assembled engine compartment; 1...Hood ridge assembly, 2.2a.
...Front side member, 4...Radiator core support, 5.5a...Cross member, 7...Datsushir lower, 8...Engine compartment 10・・・・・・
・Assembling jig.

Claims (1)

[Claims] The hood ridge assembly, radiator core support, darts lower, cross member, and front side member are each positioned and fixed at the same time on an assembly jig installed on one stage of the engine compartment assembly line, and each functional part is positioned and fixed at the same time. A method for assembling an engine compartment, characterized by assembling the engine compartment by welding and joining.