JP3407121B2 - Jig structure for assembling of different diameter molding - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling jig for press-molding a powder metal before sintering, fitting a compact having a different diameter to form a composite. Regarding the structure. 2. Description of the Related Art Heretofore, powder metal of this kind before sintering is press-formed to form boss portions having different diameters, that is, small-diameter boss portions 1a.
FIG. 4 shows an assembling jig 3 for fitting and molding a molded body 1 having a large diameter boss 2a which is fitted to the small diameter boss 1a. The assembling jig 3 includes a lower core member 4, an upper core member 8, and a holding member 1.
The lower metal core member 4 includes a receiving portion 5 on which the molded body 1 is placed, and a fitting support portion 6 which is fitted in the small diameter boss portion 1a at the center thereof. At the center of the part 6, a fitting recess 7 for fitting the upper core member 8 is provided. Further, the upper core member 8 is a large-diameter boss 2 of the molded body 2.
a fitting support portion 9 which fits inside a, and a fitting convex portion 10 which fits with the fitting concave portion 7 of the lower metal core member 4 are formed at the center thereof,
The fitting protrusion 10 is provided to be fitted concentrically by fitting the fitting protrusion 10 into the fitting recess 7. A holding member 11 is disposed on the upper side so as to be able to move up and down concentrically, and a fitting hole 12 which is fitted to the fitting support portion 9 of the upper core member 8 penetrates the center of the holding member 11. At the same time, a ring-shaped pressing protrusion 13 for pressing the molded body 2 is formed on the lower surface side of the fitting hole 12 on four sides. In order to integrally form the molded bodies 1 and 2 in the assembly jig 3 thus provided, first, a small-diameter boss portion is fitted to the fitting support portion 6 of the lower metal core member 4. 1a
And the molded body 1 is placed. Thereafter, the large-diameter boss portion 2a of the molded body 2 is externally fitted to the fitting support portion 9 of the upper metal core member 8, and the fitting convex portion 10 is fitted to the fitting concave portion 7 of the lower metal core member 4.
And placed. By moving the presser fitting 11 in this state, the pressing protrusion 13 formed on the lower surface pushes the large-diameter boss portion 2a of the molded body 2 and the fitting hole 12 becomes the upper core member. 8, the large-diameter boss 2a is simultaneously externally fitted to the small-diameter boss 1a externally fitted to the lower metal core member 4. And
When the presser fitting 11 reaches a predetermined lowering position, the molded bodies 1 and 2
The boss portions 1a and 2a are fitted and formed into an integrated composite. Then, after the presser fitting 11 is moved upward, the upper metal core member 8 is removed, and subsequently, the composite is taken out. However, in the structure of the conventional assembly jig 3, the diameter of the fitting support 9 of the upper core member 8 is smaller than the fitting support 6 of the lower core member 4. For example, in the case of an automatic assembling jig mechanism, it is difficult to align the concentric position with the lower metal core member 4 by a robot that inserts and operates the upper metal core member 8, and a small-diameter boss portion. Since the large-diameter boss portion 2a slides along the fitting support portion 9 and is directly fitted to the outer periphery of the boss 1a, there has been a problem that the composite molding is unreasonable. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to easily supply a compact and to easily fit a large-diameter boss portion and a small-diameter boss portion. An object of the present invention is to provide an assembly jig structure for a diameter molded body. SUMMARY OF THE INVENTION In order to solve the above-mentioned technical problems, the present invention is to fit a molded body having a large diameter boss with a molded body having a small diameter boss. An assembling jig to be combined into a composite, comprising a substrate member and a holding member arranged opposite to each other, and an insertion member for inserting a core member into the center of a receiving portion provided at the center of a base member of the substrate member. A guide cylinder member is connected to the insertion hole, and a guide shaft portion for externally fitting the large-diameter boss portion and a small-diameter boss portion on the upper side thereof. A support bar is provided concentrically, and a guide bar is provided below the guide shaft so as to be inserted into the guide cylinder member via a coil spring, so that the upper guide shaft and the support protrusion are received from the receiving portion. Different diameter component that is configured to be able to hold the position above and to be able to move up and down It is an assembly jig structure of a shape. With the above construction, the large-diameter boss portion and the small-diameter boss portion of the molded body are attached concentrically to the cored bar member, and the large-diameter bossed portion is pressed down by the cored bar member. The small-diameter boss portion is lowered while maintaining the fixed position, and both boss portions are fitted to each other to form a composite. An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an assembling jig 21 and FIGS. The jig 21 includes a substrate member 22 and a holding member 45.
Is constituted by a metal core member 28 supported at the center so as to be vertically movable. The substrate member 22 includes a base member 23 and a guide cylinder member 33. A receiving portion 24 for horizontally mounting the molded body 2 having the large-diameter boss portion 2a is formed in a convex shape at the center of the base receiving member 23, and a core metal member 28 is provided at the center of the receiving portion 24. Insertion hole 25 to be inserted
Is pierced. In the insertion hole 25, a large-diameter hole 26 corresponding to the inner diameter of the large-diameter boss 2a of the molded body 2 and a small-diameter hole 27 smaller in diameter than the large-diameter hole 26 are provided in a stepped manner. A guide cylinder member 33 is attached to the small-diameter hole 27 continuously, and a core metal member 28 is inserted into the insertion hole 25.
Is inserted. On the upper part of the core member 28, a base member 2 is provided.
3, a guide shaft portion 29 is formed so as to slidably fit in the large-diameter hole portion 26 and to externally fit the large-diameter boss portion 2a of the molded body 2.
On its upper side, a support projection 30 for fitting and supporting the small diameter boss 1a of the molded body 1 is formed. Also, the guide shaft 2
An upper guide bar 31 slidably fitted in the small-diameter hole 27 of the base member 23 and a lower-diameter lower guide bar 32 having a small step are formed continuously with the upper guide bar 31 at the lower portion of the base member 9. Is formed. The guide tube member 33 concentrically connected to the small-diameter hole 27 of the base member 23 is composed of two members, a connection tube member 34 and an end tube member 37. The hole portion 34a has a diameter of the same diameter, and the hole portion 34a is continuously and concentrically connected to the small diameter hole portion 27 via a metal member 35 having the same inner diameter as the small diameter hole portion 27. On the lower surface side of the cylindrical member 34, convex portions 36 are formed on the four sides of the hole 34a, and an end cylindrical member 37 is connected through the convex portions 36. The end cylindrical member 37 is formed to have the same diameter as the connecting cylindrical member 34, and a metal member 38 for slidably fitting the lower guide bar 32 of the metal core member 28 is fitted to the inner diameter portion thereof. On its upper side, a concave portion 3 fitted and connected to the convex portion 36
9 are formed. Further, a hole 40 through which the lower guide bar 32 is inserted is formed on the lower side. The guide tube member 33 thus formed is mounted concentrically in the insertion hole 25 of the base member 23, and a coil spring 41 having a predetermined spring pressure is provided in the guide tube member 33. The core member 28 is inserted, the lower surface of the upper guide bar 31 is supported by a coil spring 41, and a screw member 42 provided below the lower guide bar 32 is fixed to a screw member 42 by a nut 44. I have. The guide shaft portion 29 formed on the upper part of the cored bar member 28 thus inserted and elastically protrudes from the receiving portion 24 by a predetermined length. In the assembly jig 21 formed as described above, in order to compositely mold the molded bodies 1 and 2, first, a core metal member protruding from a receiving portion 24 formed at a central portion of a base receiving member 23. The molded body 2 is inserted into the guide shaft part 29 of 28 with the large-diameter boss part 2 a facing upward and placed on the receiving part 24. Then, the small-diameter boss portion 1a of the molded body 1 is fitted and mounted on the upper support protrusion 30 with the small-diameter boss portion 1a facing downward. In this state, the presser fitting 45 disposed at the top is lowered, and the molded body 1 fitted and mounted on the support protrusion 30 of the cored member 28 is pressed. The core metal member 28 is lowered against the coil spring 41 by the pressing of the presser fitting 45. When the core member 28 is lowered, the molded body 2
The large-diameter boss portion 2a is held at a fixed position on the receiving stand 24, and the fitted guide shaft portion 29 is lowered, and the small-diameter boss portion 1a of the molded body 1 is lowered and held at the fixed position with this drop. The large diameter boss portion 2a is fitted. And
When the bosses 1a and 2a are sufficiently fitted to each other, the holding member 45 abuts against the stopper member 46 provided upright on the base member 23, and the descent is stopped. And presser fitting 4
When the member 5 is moved upward, the cored bar member 28 is moved upward by the restoring force of the coil spring 41, and the composite molded bodies 1 and 2 fitted by the upward movement are fitted into the supporting projections 30. In this state, the composite body can be removed by being pushed up and supported by the guide shaft 29. As described above, the assembling jig 21 of the present embodiment combines the molded body 2 having the large-diameter boss 2a and the molded body 1 having the small-diameter boss 1a by fitting the mutual bosses 1a, 2a. The substrate member 22 and the holding member 45 which are opposed to each other are formed.
An insertion hole 25 for inserting a cored bar member 28 is provided at the center of a receiving portion 24 provided at the center of the base receiving member 23 of the substrate member 22, and the guide cylinder is continuously connected to the insertion hole 25. A member 33 is connected to the core shaft 28 and the guide shaft 2 is inserted into the insertion hole 25 so as to fit the large-diameter boss 2a.
9 and a supporting projection 3 on which the small-diameter boss 1a is fitted.
0 is provided concentrically, and guide bars 31 and 32 are provided below the guide shaft portion 29 so as to be inserted into the guide cylinder member 33 via the coil spring 41 to receive the upper guide shaft portion 29 and the support protrusion 30. The structure is provided so as to be able to hold the position above the part 24 and to be able to move up and down. Therefore, the molded body 2 having the large-diameter boss 2a and the molded body 1 having the small-diameter boss 1a are attached to the guide shaft 29 and the support projection 30 provided on the concentric shaft of the cored member 28, and a holding metal fitting is provided. 4
5, the molded body 2 with the large-diameter boss portion 2a located on the lower side mounted upward is held in a fixed position in the receiving portion 24, and the molded body 2 with the small-diameter boss portion 1a mounted downward. 1 is lowered integrally with the core member 28, the boss portions 1a and 2a of both the molded bodies 1 and 2 are fitted to each other to form a composite, and the core metal member 28 is raised by the raising of the holding member 45 so that the core member 28 becomes a coil spring. Since the composite is moved up by the restoring force of 41 at the same time as the composite is moved up, the composite can be easily taken out. Therefore, it is not necessary to remove the upper metal core member 8 after the compounding as in the conventional case. Actuators for attaching and detaching the cored bar member 8 can be reduced, and the cored bar 28 is attached to the guide shaft 29 and the support projection 30 provided on the concentric axis. Boss parts 1a and 2a are fitted concentrically and accurately It can, it is possible to improve the quality. The molded bodies 1 and 2 can be easily attached to and detached from the metal core member 28 by one hand chuck.
Further, since the presser fitting 45 is regulated by the stopper member 46, the height of the composite can be easily adjusted by adjusting the member 46. According to the present invention, a molded product having a large-diameter boss portion and a molded product having a small-diameter boss portion are provided on a concentric shaft on a core metal member. By attaching to the guide shaft and the support projection and pressing with the presser fitting, the molded body with the large-diameter boss located at the lower side mounted upward is held in the receiving portion at the fixed position, and the small-diameter boss is The molded body attached downward is integrally lowered with the core metal member, the bosses of both molded bodies are fitted to each other and molded into a composite,
Since the core metal member is moved upward by the restoring force of the coil spring when the presser fitting is raised, the composite is moved upward at the same time, so that the composite can be easily taken out. Since there is no need to remove the member, it is possible to reduce the number of actuators for attaching and detaching the upper core member. In addition, since the core member is attached to the guide shaft and the support protrusion provided on the concentric shaft, the molding is performed. The boss portion of the body can be accurately fitted concentrically, and the quality can be improved.

[Brief description of the drawings] FIG. 1 is a sectional view of an assembly jig. FIG. 2 is an operation explanatory view of an assembly jig. FIG. 3 is an operation explanatory view of the assembly jig. FIG. 4 is a cross-sectional view of a conventional assembly jig. [Explanation of symbols] 1,2 compact 1a, 2a Boss 21 Assembly jig 22 Board member 23 Base member 24 Receiving part 25 insertion hole 28 Core material 29 Guide shaft 30 Support projection 31, 32 Guide bar 33 Guide tube member 41 Coil spring 45 Holding bracket

Claims (1)

(57) [Claim 1] An assembling jig of a molded body having a large-diameter boss portion and a molded body having a small-diameter boss portion by fitting the mutual bosses together. An insertion hole for inserting a core metal member is formed at the center of a receiving portion provided at the center of a base member of the substrate member. The guide metal member inserted into the insertion hole is concentrically provided with a guide shaft portion for externally fitting the large-diameter boss portion and a support convex portion for fitting the small-diameter boss portion on the upper side thereof. A guide bar is provided below the guide shaft so as to be inserted into the guide cylinder member via a coil spring, so that the upper guide shaft and the support protrusion can be held above the receiving portion and vertically movable. An assembling jig structure for a molded article having a different diameter, which is provided.