JPH0469321B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to an assembly and inspection jig used when assembling thin plate structures such as automobile bodies, and a manufacturing method thereof. (Prior Art) Conventionally, such assembly and inspection jigs have been constructed entirely of formed steel plates having a predetermined thickness. As shown in Fig. 1A, the manufacturing procedure is as shown in Fig. 1A. As shown in (B), mechanically cut it leaving a machining allowance of 3 for model alignment.
Temporarily finish with a file, grinder, etc. Then, as shown in Figure 1 C, while aligning the model 4 of the structure to be inspected, cutting and polishing is performed using a file, grinder, etc., and fine details are precisely rubbed using a Komeitan etc. to complete the work. It was hot. Therefore, the manufacturing process requires many steps such as material collection, rough processing, scribing, temporary finishing, and model matching, which takes a long time, and each step is complex and requires skill as described above. Because it is a product, it has become expensive in terms of cost. Furthermore, even at the design stage before production, as shown in Figure 2, each dimension from a to j is developed by taking cross sections from mylar drawings, parts drawings, etc., which makes the design drawings complicated and difficult to read. In addition, there was a problem in that it required a great deal of effort to enter the dimensions. Therefore, in order to solve this problem, the applicant of the present application first developed an assembly jig and its manufacturing method (Japanese Patent Application No.
No. 64079) was proposed. In this manufacturing method, as shown in Figure 3A,
First, the upper part 51 of the jig main body 5 formed of a steel plate.
After cutting roughly to a size 5 to 10 mm smaller than the model size, remove the oxide film from the part, and carve irregularities on the surface. On the other hand, as shown in FIG. 3B, a mold release agent is applied to the surface of the model 6, and a surface reinforcing agent 7 is applied thereon. The surface reinforcing agent 7 is a mixture of gel coat and alumina at a ratio of 7:3, and a curing agent of about 10% of the total amount is added to the mixture. Then, a reinforcing material 8 made of fibers impregnated with gel coat is laminated on top of the surface reinforcing agent 7. Next, as shown in FIG. 3C, an intermediate member 9 made of a mixture of a putty-like thermosetting resin such as an epoxy resin and a curing agent at a ratio of 1:1 is placed on the top surface of the jig main body 5 in the form of a string. , as shown in Figure 3D, press the model 6 on top of it to make it stick tightly, leave it for about 12 to 24 hours at room temperature of 20 to 25°C to harden the surface reinforcement 7, etc. 3.
As shown in the figure, it is constructed so that unnecessary parts protruding from the end face of the surface reinforcing agent 7 etc. are scraped off and finished. According to this proposal, by configuring the workpiece receiving part of the jig with a composite material mainly made of epoxy thermosetting resin as described above, the number of man-hours required for manufacturing the jig can be reduced compared to the conventional example described above. It can be significantly reduced and easily manufactured. However, in the above proposal, if the blending ratio of the gel coat in the surface reinforcement agent 7 is incorrect, problems such as not curing or curing too quickly may occur, and the mixing requires time in advance. There were some drawbacks. In addition, in the case of the reinforcing material 8, it was necessary to apply the gel coat to fibers such as carbon cloth in advance in order to improve adhesion, and there was a slight problem in workability in this respect. Further, the epoxy resin of the intermediate member 9 has a drawback that it becomes highly viscous in winter and is easily peeled off when oil or the like adheres thereto. (Object of the Invention) The present invention is based on the above-mentioned conventional example, and furthermore, in view of the above-mentioned problems of the invention related to the above-mentioned application previously filed by the applicant, the present invention aims to simplify the structure and improve adhesiveness to the jig body. Our first objective is to provide an assembly and inspection jig that can improve the performance of the robot and eliminate all of the drawbacks of the conventional example described above.Furthermore, we aim to produce such an assembly and inspection jig with good workability and at low cost. The second purpose is to present a possible manufacturing method. (Structure of the Invention) According to the present invention, the above first object is achieved by:
In an assembly and inspection jig used when assembling thin plate structures such as automobile bodies and airplane fuselages, the product receiving part is fixed to the jig body through an adhesive and the adhesive. This was achieved by submitting an assembly and inspection jig characterized by being composed of a composite member containing a filler whose main ingredient is a thermosetting resin, and a surface coating material that covers the surface of the filler. Ru. According to the present invention, the second object is a method for manufacturing an assembly and inspection jig for supporting a thin plate structure when assembling a thin plate structure such as an automobile body or an airplane fuselage. The upper part of the jig body is cut into a shape that roughly matches the original model of the thin plate structure, and after applying adhesive to the cut surface, a filler whose main ingredient is a putty-like thermosetting resin is applied. The filling material is kneaded and deposited on the adhesive, the filler is pressed onto the corresponding surface of the model, and after being left for a predetermined period of time, it is released from the model, and then a surface covering material is applied. This can be achieved by providing a method for manufacturing an assembly and inspection jig. (Effects of the Invention) According to the present invention, the configuration is simplified and can be manufactured at a lower cost compared to the invention related to the above-mentioned application. Furthermore, the adhesiveness between the jig main body and the composite member can be improved by using a predetermined adhesive, and durability can also be improved. Therefore, compared to the conventional example described above, the performance is significantly improved, and the cost can be provided at a much lower cost. Furthermore, if molybdenum disulfide is used as a surface coating material, it dries quickly and has a low viscosity, resulting in good workability and improved wear resistance. Further, according to the manufacturing method according to the present invention, it is possible to significantly save labor during manufacturing compared to the conventional example,
Compared to the invention of the above-mentioned application, it has various useful effects such as improved workability due to the reduction in the number of steps and the ability to manufacture stable jigs in a short time. sell. (Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 5 is a perspective view schematically showing an embodiment of the assembly and inspection jig according to the present invention, and the assembly and inspection jig A is bonded to the upper surface of the jig body 10 made of a steel plate. A layer of filler 12 mainly composed of epoxy resin is formed via agent 11, and the surface of filler 12 is further covered with a dry film 13 of molybdenum disulfide as a surface coating agent. In this embodiment, a modified acrylic adhesive (e.g., equivalent to Versaroc 201 manufactured by Sony Chemical) is used as the adhesive 11, and only epoxy putty (e.g., equivalent to XD-580 manufactured by Ciba Geigy) is used as the filler 12. The above-mentioned concept of "base resin" includes cases where only epoxy resin is used. Further, the surface coating agent 13 may be applied to the filler 12.
The molybdenum disulfide (DM-100 manufactured by Nippon Molybdenum Co., Ltd.)
equivalent) is preferred. The workpiece contact surface formed by the upper surface 13a of the surface coating material 13 has a shape that precisely corresponds to the contact surface of a workpiece (not shown). Next, a method for manufacturing the assembly and inspection jig A according to this embodiment will be explained. First, the upper part of the jig main body 10, which has been roughly machined in advance and is erected on the base 14, is roughly cut to a dimension t that is approximately 10 to 15 mm away from the dimension of the workpiece model 15, as shown in FIG. 6A. Note that the cutting is performed by appropriate means such as gas cutting or milling. In this case, the cutting portion 16 can be indicated by simply marking it roughly with a scale or the like according to the design drawing, and there is no need to enter complicated and accurate cross-sectional dimensions as in the conventional example. Next, as shown in FIG. 6B, the oxide film, oil stains, etc. adhering to the slightly uneven cut surface 17 are removed with an appropriate cleaning agent (for example, Daikin Industries' Daiflon Solvent or acetone).
clean. After that, as shown in FIG. 6C, a modified acrylic adhesive 18 is first applied to the cut surface 17, and a filler 12 made of putty-like epoxy resin kneaded into a string is placed on top of it. Then, the filler 12 is roughly adapted to the cut surface 17. Next, as shown in FIG. 6D, the upper surface of the filling material 12 is crimped to the corresponding surface of the model 15 placed above it, and the filling material is left for 1 to 24 hours depending on the temperature and other conditions. Wait for the material 12 to harden. Note that it is desirable to apply a mold release agent to the surface of the filler 12 before pressing it onto the model 15. After the filler 12 has hardened, the model 15 is released from the mold as shown in FIG. Jig body 10
Finish on the same surface. Then, as shown in FIG. 6, molybdenum disulfide 13 as a surface coating agent is applied to the entire surface of the finished filler 12 and dried to form a dry film, thereby completing the production. In this example, only the epoxy resin is used as the filler 12, so unlike the invention related to the above-mentioned application, it is possible that the ratio may be incorrectly mixed with the gel coat and the resin may not be cured or may be cured too quickly. There are no problems and curing can always be scheduled within a predetermined time. In addition, by interposing a modified acrylic adhesive at the interface between the jig body 10 and the filler 12,
It is possible to eliminate poor adhesion caused by the epoxy resin, which becomes slightly more viscous in the winter and tends to deteriorate its adhesion, and variations in adhesion strength caused by oil adhering to the adhesion surface of the jig main body 10 made of a steel plate.
Stable adhesion is always guaranteed. In addition, by omitting the gel coat and carbon cloth used in the invention of the above application and using the filler 12 only with epoxy resin, the number of man-hours can be further reduced, and the resin will not adhere to clothes or the surrounding area or cause contamination. can be improved. Further, by coating the surface of the filler 12 after molding and hardening with molybdenum disulfide, which dries quickly and has low viscosity, the abrasion resistance is improved and the durability of the jig A is improved. Furthermore, as described above, the number of steps is reduced and the workability is improved, making it possible to shorten the manufacturing time and make it possible to manufacture a large amount of jigs A at a lower cost. In addition, in the above embodiment, an example was shown in which a single epoxy resin was used as the filler 12, but if necessary, it is also possible to mix fibers such as glass or carbon to improve the strength. Besides, other thermosetting resins such as urethane or phenolic resin can be used. In addition, although an example was shown in which a modified acrylic adhesive was used as the adhesive 11 and molybdenum disulfide was used as the surface coating agent, it is possible to use any material that has equivalent performance for both, These can be omitted if necessary. Furthermore, after the filler 12 is crimped onto the model 15, it is possible to cut it with a knife or the like while it is in a soft state before hardening, and various modifications and changes can be made without departing from the gist of the present invention. Needless to say, it is possible. Next, an assembly and inspection jig (hereinafter referred to as jig I) manufactured based on the above example and a jig manufactured using the method related to the above-mentioned applicant's earlier application (hereinafter referred to as jig The results of an experiment comparing the wear resistance performance, compression resistance, and fatigue performance with the FIG. 7 shows an outline of the experimental equipment used for the wear resistance test. In this equipment, jig A is fixed to the base 19, and an air cylinder 20 Hardened steel (HRC-40 to 50) that is fixed to the rod and reciprocates in the horizontal direction in the figure.
A steel material 22 weighing 10 kg was placed on top of the scraping block 21, and an experiment was conducted by moving the scraping block 21 forward with a stroke S = 20 mm, and the amount of wear l shown in Fig. 7 (b) was determined. It was measured. The diameter of the cylinder 20 is 60φ, and the surface area of jig A as a test piece is 20×100 mm ² . Fig. 8 shows an apparatus for compression resistance and fatigue performance testing, in which jig A as a test piece is fixed to the base 19, a hammer block 23 of φ80 is fixed to the rod of the air cylinder 20, and Move forward with a stroke S = 40 mm, and the surface of the test piece
It was set so that a surface pressure of 6 kg/cm ² was applied to A ₁ .
Note that the surface area of the test piece was 20 x 60 ^mm2 . However, from the results shown in Table 1 below, it was found that the jig according to the present invention was superior in wear resistance performance and had comparable compressive fatigue resistance performance.

[Table] * The amount of wear on the wear-resistant test piece is calculated by calculating the amount of wear on the one-sided contact area.
show.

[Brief explanation of drawings]

Fig. 1 A, B, and C are explanatory diagrams showing the manufacturing process of a conventional jig, Fig. 2 is an explanatory diagram showing an example of filling in workpiece cross-sectional dimensions of the design drawing, and Fig. 3 A to H are explanatory diagrams showing the manufacturing process of a conventional jig. An explanatory diagram showing the manufacturing process of the jig related to the person's earlier application,
Fig. 4 is a schematic diagram after its completion, Fig. 5 is a conceptual diagram of the assembly and inspection jig according to the present invention, Figs. 8
The figure is a conceptual diagram showing an example of a test device for wear resistance, compression resistance, and fatigue tests. A...Jig for assembly and inspection, 10...Jig body,
11... Adhesive, 12... Filler, 13... Surface coating agent, 15... Model (work), 17... Cut surface.

Claims (1)

[Scope of Claims] 1. An assembly and inspection jig used when assembling thin plate structures such as automobile bodies and airplane fuselages, in which the product receiving part is attached to an adhesive and a An assembly and inspection jig characterized in that it is composed of a composite member including a filler made of thermosetting resin as a main ingredient, which is fixed to a jig body, and a surface coating material that covers the surface of the filler. . 2. The assembly and inspection jig according to claim 1, wherein the filler is made of a putty-like epoxy resin. 3. The assembly and inspection jig according to claim 1, wherein the filler is made of a putty-like epoxy resin mixed with fibers. 4. The assembly and inspection jig according to any one of claims 1 to 3, wherein the adhesive is a modified acrylic adhesive. 5. The assembly and inspection jig according to any one of claims 1 to 4, wherein the surface coating agent is molybdenum disulfide. 6. When assembling a thin plate structure such as an automobile body or an airplane fuselage, in a method for manufacturing an assembly and inspection jig that supports the thin plate structure, the upper part of the jig body is shaped like the original shape of the thin plate structure. After cutting into a shape that approximately matches a certain model and applying adhesive to the cut surface, knead a filler whose main ingredient is a putty-like thermosetting resin and adhere it to the adhesive. A method for manufacturing an assembly and inspection jig, characterized in that the jig is crimped onto a corresponding surface of the model, left for a predetermined period of time, then released from the model, and then coated with a surface covering material.