JPS6128475B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an assembly jig post used when assembling thin plate structures such as automobile bodies and airplane bodies.

Conventionally, the assembly jig post as described above is entirely formed of a steel plate, and its molding process is first carried out by applying a cross section of the workpiece according to the design drawing to the jig 1, which has been roughly machined in advance, as shown in Fig. 1A. Add the overhang lines 2 according to the dimensions, and perform temporary finishing by cutting, leaving a machining allowance 3 for model alignment, as shown in Figure 1B, and then cut the thin plate structure as shown in Figure 1C. Since the original model 4 was assembled and molded by cutting and polishing with files, grinders, etc., there were many manufacturing steps, and the work not only took time,
It required skill. Further, since the cross-sectional dimensions of the workpiece are written in the design drawings, the drawings become complicated and difficult to read, and it also requires a great deal of effort to write the dimensions.

By constructing the workpiece receiving part of the jig post with a composite material mainly made of epoxy thermosetting resin, the present invention greatly reduces the number of man-hours required to manufacture the jig post, making it easy to manufacture. The purpose of this invention is to solve the above-mentioned conventional problems.

The present invention will be described below with reference to illustrative embodiments.

Reference numeral "a" denotes an assembly jig post erected on a base 11, and a gel-like material forming a workpiece receiving surface is interposed between a jig post main body 12 made of a steel plate and an intermediate member 13 made of a thermosetting epoxy resin. The surface member 14 is composed of gel coat, which is a thermosetting resin, and ceramic powder, such as alumina, and the workpiece contact surface of the surface member 14 is the contact surface of a workpiece (not shown), which is a thin plate structure. It is constructed in the same shape as. 15 is a bracket that holds the jig post a.

Next, to explain the manufacturing method of the jig post a according to the present invention, first, the upper part of the jig post main body 12, which has been rough-processed in advance and is erected on the base 11, is the original shape of the workpiece which is a thin plate structure. After performing gas cutting in a rough manner to a dimension 5 to 10 mm away from the dimension of model b, the oxide film on the part is removed, and unevenness is carved on the upper surface. (See FIG. 3A) Note that the above-mentioned cut portion can be measured by simply measuring the design drawing with a scale or the like and marking it on the jig post body 12, so there is no need to write in the cross-sectional dimensions of the workpiece in the design drawing.

Next, a mold release agent is applied to the model B side, and on top of that, gel coat, which is a gel-like thermosetting resin, and ceramic powder such as alumina, which will become the surface member 14, are applied.
3 and a hardening agent of about 10% of the total amount is applied to it, and furthermore, auxiliary fibers (for example, carbon cloth, etc.) 16 soaked in gel coat are layered on top of it, and On the gas-cut upper surface of the jig post main body 12, a string-like mixture of thermosetting epoxy resin and curing agent in a 1:1 ratio, which will become the intermediate member 13, is placed. , Press the model b coated with the surface strengthening agent on top of it to bring it into close contact. After that 20
After the surface reinforcement agent and epoxy resin have sufficiently hardened by leaving it at room temperature between ℃ and 25℃ for about 12 to 24 hours, model b is released from the mold and the side part is polished with a grinder (not shown) to finish. .

In the above embodiment, the reinforcing fiber 16 is model b.
Although an example has been described in which the fibers 16 are laminated on the side of the surface reinforcing agent coated on the side, the present invention is not limited to this. They may be stacked.

As described above, according to the present invention, the workpiece receiving portion of the assembly jig post is constructed of a composite material mainly made of thermosetting resin, so that the man-hours for manufacturing the jig post can be significantly reduced. Since the manufacturing time of the jig post can be greatly shortened, and the jig post can be manufactured at a low price, the jig post can be manufactured at a low price.

Further, according to the present invention, after the gel-like thermosetting resin serving as the surface member is brought into close contact with the model, the model is released from the mold to create the assembly jig post.
The shape of the model can be accurately inverted.

Furthermore, since the thin plate structure can be supported repeatedly, it becomes possible to mass produce the thin plate structure.

Furthermore, according to the present invention, ceramic powder is mixed with the gel-like thermosetting resin that forms the surface member, and reinforcing fibers are laminated, so that only the resin agent can be used.
The abrasion resistance is improved compared to a molded one, and brittle fracture is less likely to occur, so accuracy is guaranteed over a long period of time, and a highly durable assembly jig post can be manufactured.

Furthermore, according to the present invention, jig post maintenance can be simplified and corrections can be made in a short period of time on an operating line, and model fitting time per jig post can be shortened by eliminating model matching man-hours. Expansion using multiple isomorphic models can be reduced to just one model through adjustment. Therefore, the number of models per vehicle type can be reduced, which is economical.

Further, according to the present invention, there is no need to enter the cross-sectional dimensions of the workpiece in the design drawings, so the number of man-hours for this purpose is eliminated, and the drawings are also easier to read, making the invention industrially useful.

[Brief explanation of the drawing]

Figure 1 A, B, and C are explanatory diagrams showing the manufacturing process of a conventional assembly jig post, Figure 2 is a perspective view of an assembly jig post according to the present invention, and Figures 3 A to H are the same manufacturing process as above. It is an explanatory diagram showing a process. 12 is a jig post body, 13 is an intermediate member, 14 is a surface member, and 16 is a fiber.

Claims (1)

[Claims] 1. When assembling a thin plate structure such as an automobile body or an airplane fuselage, in an assembly jig post that supports the thin plate structure, the upper part of the jig post main body is made to approximately match the original model of the thin plate structure. On the other hand, a mold release agent was applied to the surface of the model in advance, and a surface reinforcement agent made of a mixture of gel-like thermosetting resin and ceramic powder was applied on top of it.
Furthermore, along with laminating reinforcing fibers on top of that,
A putty-like thermosetting resin is placed on the top surface of the jig post body, the model is pressed onto it, and after the surface reinforcement and the putty-like thermosetting resin are hardened, the model is released. A method for manufacturing an assembly jig post characterized by molding.