JPH08238595A - Assembly jig structure of forming body having special diameter - Google Patents

Abstract

PURPOSE: To concentrically fit the boss part of a forming body by providing a guide bar to insert it in a guide cylinder member through a coil spring, installing a guide shaft part of the upper side and a support projection part upper than a receive part, and keeping to enable them to be movable up and down. CONSTITUTION: A forming body 2 having a large diameter boss part 2a and a forming body 1 having a small diameter boss part 1a are attached to a guide shaft part 29 and a support projection part 30 installed on the same shaft to a core metal member 28, and they are pressed with a holding metal fitting 45. The forming body 2 attached with the boss part 2a of large diameter facing upward is held with the receive part 24, the forming body 1 attached with the boss part 1a of small diameter facing downward is lowered by being made in one body with the core metal member 28, the boss parts 1a, 2a of both forming bodies 1, 2 are fit and the composite body is made. By raising the holding metal fitting 45, the core metal member 28 is moved upward together with the composite body with the recovering force of the coil spring 41 and the composite body can be taken out easily. In such a way, with the guide shaft part 29 and the support projection part 30 installed on the same shaft to the core metal member 28, the boss parts 1a, 2a can be made to fit concentrically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling jig structure for press-molding powder metal before sintering to fit molded bodies having different diameters to perform composite molding.

[0002]

2. Description of the Related Art Conventionally, a powder metal before sintering of this kind is press-molded to have a boss portion having a different diameter, that is, a boss portion 1a having a small diameter.
FIG. 4 shows an assembling jig 3 for fitting and molding the molded body 1 having the above and the molded body 2 having the large diameter boss portion 2a fitted onto the small diameter boss portion 1a. The assembling jig 3 includes a lower core metal member 4, an upper core metal member 8 and a holding metal fitting 1.
The lower core metal 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. A fitting recess 7 into which the upper core metal member 8 is fitted is provided at the center of the portion 6. Further, the upper core metal member 8 is the large-diameter boss portion 2 of the molded body 2.
A fitting support portion 9 that fits inside a and a fitting protrusion portion 10 that fits into the fitting recess portion 7 of the lower core metal member 4 are formed in the center of the fitting support portion 9.
By fitting the fitting convex portion 10 into the fitting concave portion 7, the fitting convex portion 10 is concentrically coupled. Further, a holding metal fitting 11 is concentrically arranged on the upper side of the holding metal fitting 11 so as to be vertically movable, and a fitting hole 12 which is fitted to the fitting support portion 9 of the upper mandrel member 8 is formed at the center of the holding metal fitting 11. A ring-shaped pressing convex portion 13 that presses the molded body 2 is formed around the fitting hole 12 on the lower surface side.

In the assembling jig 3 thus provided, the molded bodies 1 and 2 are integrally fitted to each other for composite molding. First, the fitting support portion 6 of the lower core metal member 4 is provided with a small boss portion. 1a
And the molded body 1 is placed. Then, the large-diameter boss portion 2a of the molded body 2 is externally fitted to the fitting support portion 9 of the upper core metal member 8, and the fitting convex portion 10 is fitted to the fitting concave portion 7 of the lower core metal member 4.
Fit and place. By moving the holding metal fitting 11 in this state, the pressing convex portion 13 formed on the lower surface pushes the large-diameter boss portion 2a of the molded body 2 and the fitting hole 12 is formed in the upper core metal member. The boss portion 2a having a large diameter is externally fitted to the fitting support portion 9 of FIG. 8 and at the same time, the boss portion 1a having a small diameter externally fitted to the lower core metal member 4 is fitted. And
When the holding metal fitting 11 reaches a predetermined lowering position, the molded bodies 1, 2
The bosses 1a and 2a are fitted to each other and molded into an integral composite body. Then, after the pressing metal fitting 11 is moved upward, the upper core metal member 8 is removed, and then the composite is taken out.

[0004]

However, in the construction of the conventional assembly jig 3, the diameter of the fitting support portion 9 of the upper core metal member 8 is smaller than the diameter of the fitting support portion 6 of the lower core metal member 4. Since the diameter is large, for example, in the case of an automatic assembly jig mechanism, it is difficult to align the concentric position with the lower core metal member 4 by a robot that inserts and operates the upper core metal member 8, and the large diameter boss 1a is large. Since the diameter boss portion 2a is slid along the fitting support portion 9 to be directly fitted on the outside, there is a problem in that the composite molding becomes unreasonable.

The present invention has been made in order to solve the above-mentioned conventional problems, and it is possible to easily supply a molded body and easily fit a large-diameter boss portion and a small-diameter boss portion. It is an object of the present invention to provide a structure for assembling a diameter molded body.

[0006]

SUMMARY OF THE INVENTION In order to solve the above technical problems, according to the present invention, a boss having a large boss and a boss having a small boss are fitted to each other. An assembly jig for forming a composite body, which is composed of a board member and a pressing metal member arranged opposite to each other, and 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 receiving member of the board member. In addition, a guide cylinder member is continuously connected to the insertion hole, and the core metal member inserted into the insertion hole is fitted with a guide shaft portion on which the large diameter boss portion is fitted and a small diameter boss portion on the upper side thereof. A support bar is provided concentrically, and a guide bar is inserted below the guide shaft to insert into the guide cylinder member via a coil spring, and is positioned above the upper guide shaft and the support protrusion. Assembling and repairing different-diameter compacts that can be held and moved up and down It is a structure.

[0007]

With the above structure, the large-diameter boss portion and the small-diameter boss portion of the molded body are concentrically attached to the core metal member, and the core metal member is pressed down to hold the large-diameter boss portion in a fixed position. Then, the small-diameter boss is lowered, and both bosses are fitted to each other to form a composite body.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, 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. Is composed of a board member 22 and a pressing member 45.
Is composed of a cored bar member 28 movably supported in the center thereof. The substrate member 22 is composed of a base receiving 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 for insertion
Is pierced. The insertion hole 25 has a large-diameter hole portion 26 corresponding to the inner diameter of the large-diameter boss portion 2a of the molded body 2 and a small-diameter hole portion 27 having a smaller diameter than the large-diameter hole portion 26. A guide cylinder member 33 is continuously attached to the small diameter hole portion 27, and a cored bar member 28 is inserted in the insertion hole 25.
Has been inserted.

The base receiving member 2 is provided on the core metal member 28.
3. A guide shaft portion 29 is formed that slidably fits into the large diameter hole portion 26 of No. 3 and externally fits the large diameter boss portion 2a of the molded body 2,
On the upper side thereof, a support convex portion 30 for fitting and supporting the small diameter boss portion 1a of the molded body 1 is formed. In addition, the guide shaft portion 2
An upper guide bar 31 slidably fitted in the small-diameter hole portion 27 of the base receiving member 23 is provided at the lower portion of the base receiving member 23, and a lower guide bar 32 having a small diameter is integrally formed in a stepped manner continuously from the upper guide bar 31. Is formed in.

The guide cylinder member 33, which is concentrically continuous with the small-diameter hole portion 27 of the base receiving member 23, comprises two members, a connection cylinder member 34 and an end cylinder member 37. The connection cylinder member 34 has a predetermined size. Has a hole portion 34a having a diameter of, and the hole portion 34a is continuously and concentrically connected to the small diameter hole portion 27 through a metal member 35 having an inner diameter of the same diameter as the small diameter hole portion 27. On the lower surface side of the tubular member 34, convex portions 36 are formed on the four circumferences of the hole 34a, and the end tubular member 37 is connected via the convex portions 36.

The end cylinder member 37 is formed to have the same diameter as the connection cylinder member 34, and a metal member 38 for slidably fitting the lower guide bar 32 of the cored bar member 28 is fitted to the inner diameter portion thereof. On the upper side thereof, the concave portion 3 which is fitted and connected to the convex portion 36
9 is formed. Further, a hole 40 through which the lower guide bar 32 is inserted is formed on the lower side.

The guide cylinder member 33 thus formed is concentrically attached to the insertion hole 25 of the base receiving member 23, the guide cylinder member 33 is internally provided with a coil spring 41 having a predetermined spring pressure, and The cored bar member 28 is inserted, the lower surface of the upper guide bar 31 is supported by the coil spring 41, and the screw member 42 provided at the lower portion of the lower guide bar 32 has a stopper member 43 fixed by a nut 44. There is. The guide shaft portion 29 formed on the upper portion of the cored bar member 28 thus inserted and elastically attached projects from the receiving portion 24 by a predetermined length.

In the assembling jig 21 thus formed, in order to form the molded bodies 1 and 2 in a composite manner, first, the core metal member protruding from the receiving portion 24 formed in the central portion of the base receiving member 23. The molded body 2 is inserted into the guide shaft portion 29 of 28 with the large-diameter boss portion 2a facing upward, and is placed on the receiving portion 24. Then, the small-diameter boss portion 1a of the molded body 1 is fitted and mounted on the supporting convex portion 30 on the upper side so as to face downward. In this state, the pressing metal fitting 45 disposed on the upper part is lowered, and the molded body 1 fitted and mounted on the supporting convex portion 30 of the cored bar member 28 is pressed. By the pressing of the retainer fitting 45, the cored bar member 28 is lowered against the coil spring 41.

When the cored bar member 28 descends, the molded body 2
The large-diameter boss portion 2a is held in a fixed position on the pedestal 24, the fitted guide shaft portion 29 is lowered, and the small-diameter boss portion 1a of the molded body 1 is also lowered to hold the fixed position in accordance with this lowering. The large-diameter boss portion 2a is fitted. And
With the mutual boss portions 1a and 2a being sufficiently fitted, the pressing member 45 is brought into contact with the stopper member 46 provided upright on the base receiving member 23 to stop the descent. And the presser fitting 4
When 5 is moved up, the cored bar member 28 is moved up by the restoring force of the coil spring 41, and the molded bodies 1 and 2 of the composite body fitted by this up movement are fitted on the support projections 30. In this state, it is pushed up and supported by the guide shaft portion 29, so that the composite body can be removed.

As described above, the assembly jig 21 of this embodiment is formed by fitting the molded body 2 having the large-diameter boss portion 2a and the molded body 1 having the small-diameter boss portion 1a into the mutual boss portions 1a and 2a. The base member 22 and the pressing metal fitting 45 that are opposed to each other
An insertion hole 25 for inserting the cored bar member 28 is formed at the center of the receiving portion 24 provided at the center of the base receiving member 23 of the substrate member 22, and the guide tube is continuous with the insertion hole 25. The core metal member 28 that connects the member 33 and is inserted into the insertion hole 25 is the guide shaft portion 2 that fits the large-diameter boss portion 2a onto the guide shaft portion 2.
9 and a supporting convex portion 3 into which the small-diameter boss portion 1a is fitted on the upper side thereof.
0 are provided concentrically, and guide bars 31 and 32 which are inserted into the guide cylinder member 33 via the coil spring 41 are provided below the guide shaft portion 29 to receive the upper guide shaft portion 29 and the support protrusion 30. It is configured such that it can be held above the portion 24 and can be moved up and down. Therefore, the molded body 2 having the large-diameter boss portion 2a and the molded body 1 having the small-diameter boss portion 1a are attached to the guide shaft portion 29 and the support convex portion 30 provided on the core metal member 28 on the concentric axis, and the pressing metal fitting is attached. Four
When pressed by 5, the molded body 2 having the large-diameter boss portion 2a located on the lower side facing upward is held in place in the receiving portion 24, and the molded body 2 having the small-diameter boss portion 1a mounted downward. 1 is lowered integrally with the cored bar member 28, the boss portions 1a, 2a of both molded bodies 1 and 2 are fitted to each other to form a composite body, and the cored bar member 28 is coiled by the lifting of the holding metal fitting 45. Since the composite body is moved up at the same time when it is moved up by the restoring force of 41, the composite body can be easily taken out. Therefore, it is not necessary to remove the upper cored bar member 8 after the combination as in the conventional case. The number of actuators for attaching and detaching the cored bar member 8 can be reduced, and the cored bar member 28 is attached to the guide shaft portion 29 and the support projection 30 provided on the concentric shaft. Accurately fit the bosses 1a and 2a concentrically It can, it is possible to improve the quality. Further, the attachment / detachment of the molded bodies 1 and 2 to / from the cored bar member 28 can be easily performed with a one-hand chuck.
Further, since the pressing metal member 45 is regulated by the stopper member 46, the height of the composite body can be easily adjusted by adjusting the member 46.

[0016]

As described above, according to the present invention, the guide shaft portion in which the molded body having the large-diameter boss portion and the molded body having the small-diameter boss portion are concentrically provided on the core metal member, is constituted. By mounting it on the support convex part and pressing it with the pressing metal fitting, the large-diameter boss located on the lower side is fixed in the receiving part, and the small-diameter boss is fixed downward. The attached molded body is lowered together with the core metal member, the boss portions of both molded bodies are fitted to each other and molded into a composite body,
The core metal member is moved upward by the restoring force of the coil spring by the lifting of the presser fitting, and at the same time, the composite body is also moved upward, so that the composite body can be easily taken out. Since it is not necessary to remove the member, it is possible to reduce the number of actuators for attaching and detaching the upper core metal member, and to mount the core metal member on the guide shaft portion and the supporting convex portion provided on the concentric shaft. The boss portion of the body can be fitted concentrically and accurately, and the quality can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an assembly jig.

FIG. 2 is an explanatory view of the action of the assembly jig.

FIG. 3 is an explanatory view of the action of the assembly jig.

FIG. 4 is a cross-sectional view of a conventional assembly jig.

[Explanation of symbols]

 1 and 2 molded bodies 1a and 2a Boss part 21 Assembly jig 22 Board member 23 Base receiving member 24 Receiving part 25 Insertion hole 28 Core metal member 29 Guide shaft part 30 Support convex part 31, 32 Guide bar 33 Guide cylinder member 41 Coil Spring 45 Press fitting

Claims (1)

[Claims] 1. An assembly jig for fitting a boss having a large diameter boss and a boss having a small boss to each other to form a composite body, wherein the board members are opposed to each other. And a retainer, and an insertion hole for inserting the core metal member is provided at the center of the receiving portion provided at the center of the base receiving member of the substrate member, and the guide cylinder member is continuously connected to this insertion hole. The core metal member that is inserted into this insertion hole is provided with a guide shaft portion that externally fits the large-diameter boss portion and a support convex portion that fits the small-diameter boss portion concentrically on the upper side of the guide shaft portion. A guide bar that is inserted through a coil spring in the guide cylinder member is provided, and the guide shaft portion and the support protrusion on the upper side are provided above the receiving portion so that they can be held in a position above and are movable up and down. Assembly jig structure.