JPH0679683A - Manufacture of component parts of box-shaped machine - Google Patents

Abstract

PURPOSE:To suppress the costs for materials and processing, shorten the time for manufacture, and facilitate automation of the manufacturing processes by forming each member as a laminate of steel sheets. CONSTITUTION:Each mechanical component part is formed from a plurality of members having a flat part, wherein each member consists of a plurality of steel sheets, and a locational hole and a caulking hole are provided in the plane part of the laminated sheet of each member, and a projection is furnished at the end face of each laminated sheet, and a plurality of laminate sheets are laminated, and a caulk pin 21 is fitted in the caulking hole, and each member is formed in a single piece by securing adjoining laminate sheets with one another, and projections 31, 51 on the members perpendicularly intersecting one another are fitted in the locational hole, and then the tips of these projections 31, 51 are secured to the member having locational hole by caulking or welding so that a box-shaped mechanical component part is formed in a single piece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a mechanical component such as an arm of an industrial robot, and more particularly to a box-shaped mechanical component.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG. 5, an industrial robot has one end of a first arm 11 rotatably connected to a base 1 and the other end of the first arm 11 connected thereto. Are connected so that the second arm 12 can be rotated. First
The arm 11 includes two side wall members 2A and 2A that face each other.
The back member 3 connecting B and the cover 4 are formed in a box shape, and end members 5 are provided at both ends of the side wall members 2A and 2B.
A and 5B are provided to connect both side wall members 2A and 2B, and end members 5A and 5B are provided with connecting members 7 and 8. First
As shown in FIG. 6, each part of the arm 11 is prepared by cutting a shape of each part from a plate material having a plate thickness suitable for each part, or forming by bending or the like to prepare a plurality of members. The members are arranged and fixed to each other by welding as shown by a thick line to form a welded structure, or an integrally formed structure by casting. These machine structural parts include holes for mounting other parts, for example, mounting holes 24 for the side wall members 2A, 2B, connecting holes 71, 81 for fitting the connecting pins 6 to the connecting members 7A, 8 and mounting holes 74, 84. Is provided by post processing.

[0003]

However, in the method of welding structure described above, a plurality of members having different plate thicknesses are prepared, the shape of the member suitable for each part of the machine component is cut, and then the Since a process of processing each member by bending and welding is performed, a plurality of types of processing machines are required, and it takes a lot of manufacturing time and a lot of labor for transportation between the processes. In addition, in the method of the integral molding structure by casting, it takes a lot of time from the preparation of the mold to the casting, and further the time and effort of machining are required. As described above, since there are many kinds of materials and kinds of steps, there is a drawback that it is difficult to automate the steps of consistently manufacturing from materials to products. INDUSTRIAL APPLICABILITY The present invention reduces the material cost and the manufacturing cost by reducing the types of materials and processing machines, shortens the manufacturing period, and
It is intended to facilitate automation of the manufacturing process.

[0004]

SUMMARY OF THE INVENTION The present invention is a method for manufacturing a box-shaped machine component constituted by a plurality of members each having a flat surface portion, in which a flat surface portion of a laminated plate having the shape of the flat surface portion of each member is provided. Providing a projection on the end face of the laminated plate with positioning holes and caulking holes, laminating a plurality of the laminated plates, by fitting caulking pins into the caulking holes and fixing the adjacent laminated plates to each other, The protrusions and the positioning holes of the members, which are configured integrally with each other and are orthogonal to each other, are fitted, and after the protrusions are fitted into the positioning holes, the tips of the protrusions are fixed to the member having the positioning holes by caulking or welding. Then, the box-shaped machine component is integrally formed, and in particular, the mounting holes formed in the respective members are simultaneously processed at the time of forming the laminated plate.

[0005]

Since the machine component is composed of a plurality of members each having a flat surface and each member is formed by laminating a plurality of thin steel plates, even if the thickness of each member is different, the number of laminated layers is changed. Since it is possible to form a laminated plate by cutting from a thin steel plate having the same thickness by an automatic processing machine such as an NC punching machine, and adjoining laminated plates to be integrally fixed to configure each member, the type of material Less and the material cost is lower. Further, since the respective members are coupled by fitting the projection and the positioning hole, which are machined by pressing at the same time when the laminated plate is formed, the type of machining and the machining time can be reduced.

[0006]

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of a machine component constructed by the method of the present invention, in which a first arm 11 is attached to side wall members 2A, 2
B, the back member 3, the cover 4, the end members 5A, 5B, and the connecting members 7A, 7B, 8 are each divided into respective flat members, and each member is formed by stacking laminated plates cut out from thin steel plates. Adjacent laminated plates are fixed to each other and integrally formed. FIG. 2 is a layout drawing when a laminated plate of each member is cut out from one thin steel plate 9, and a flat surface portion of the laminated plate of the side wall members 2A and 2B has a rear member 3 which is a member to be assembled.
And projections 31 and 5 provided on the end surfaces of the end members 5A and 5B.
Positioning hole 22 having a size in which 1 fits in a predetermined number of layers
In addition to the above, a caulking hole 23 into which the caulking pin 21 is fitted and a mounting hole 24 into which the cover 4 is fixed are provided so as to fix the laminated sheets to each other. In addition to the protrusion 31, the caulking hole 32 is provided on the laminated plate of the back member 3 to cover the cover 4
A mounting hole 41 is provided in the. End member 5A, 5B
In addition to the protrusion 51, the connecting members 7A, 7B
Alternatively, the positioning hole 52 and the caulking hole 53 are sized so that the projections 72 or 82 provided on the same 8 are fitted by the number of stacked layers.
Is provided. In addition to the protrusions 72 or 82, the laminated plates of the connecting members 7A, 7B are provided with connecting holes 71, 81, caulking holes 73 or 83, and mounting holes 74 or 84 for mounting other parts. Positioning holes, caulking holes, mounting holes, etc. of each member having the above shape are processed by an NC punching machine, an NC laser processing machine, etc., and the contours of each member are cut, and the necessary number of pieces are automatically cut out, Each member is laminated, caulking pins are fitted into caulking holes, and adjacent laminated plates are fixed to each other. For example, in the case of the connecting member 8, as shown in FIG. 3, caulking pins 85 are fitted into the caulking holes 83 and caulked, and a plurality of laminated plates are integrally fixed. The other parts are also laminated and fixed in the same manner as shown in FIG.
As shown in FIG. 3, the side wall members 2A and 2B, the back surface member 3, the cover 4, the end members 5A and 5B, and the connecting member 7 are molded.
Each member of A, 7B, and 8 is molded and prepared for one first arm 11. Next, each of these members is supplied to the assembly work site in the order of steps, and the projections of each member to be combined are fitted into the positioning holes of the mating member. For example, first, the connecting member 7
The projections 72 of A and 7B are fitted into the positioning holes 52 of the end member 5A, and the tips of the projections 72 are caulked to form the connecting member 7.
A and 7B and the end member 5A are integrally formed. Similarly, the connecting member 8 and the end member 5B are integrally formed. Next, the projection 31 of the back member 3 and the projection 51 of the end members 5A and 5B are fitted into the positioning holes 22 of the side wall member 2A, and the positioning holes 22 of the side wall member 2B are fitted into the projections 31 and 51. To form a box shape, and the tip of the protrusion 51 is caulked or welded to integrally form the first arm 11 shown in FIG.

[0007]

As described above, according to the present invention, each member of the machine component is formed by laminating laminated plates having the same thickness, and the member orthogonal to the plane portion of each member is used as the positioning hole. Since it is fitted and fixed by the projections, the following effects are obtained. (1) Since members having different thicknesses can be formed with a small number of types of materials, the material cost can be reduced. (2) The period from material acquisition to production is shortened. (3) It is easy to automate the process from material taking to assembling, and the manufacturing cost is reduced. (4) Even if there is a design change, there is almost no need to change the equipment, and the equipment cost is low.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a layout view showing a state of material removal according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a part of the process of the embodiment of the present invention.

FIG. 4 is a perspective view showing a member according to an embodiment of the present invention.

FIG. 5 is a perspective view showing an industrial robot.

FIG. 5 is a perspective view showing a member of a conventional example.

[Explanation of symbols]

 1 Base 11 1st arm 2A, 2B Side wall member 21,85 Caulking pin 22,52 Positioning hole 23,32,53,73,83 Caulking hole 24,41,74,84 Mounting hole 3 Rear member 31,51,72,82 Protrusion 4 Cover 5A, 5B End member 7A, 7B, 8 Connecting member 9 Thin steel plate

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[Procedure amendment]

[Submission date] August 18, 1993

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a layout view showing a state of material removal according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a part of the process of the embodiment of the present invention.

FIG. 4 is a perspective view showing a member according to an embodiment of the present invention.

FIG. 5 is a perspective view showing an industrial robot.

FIG. 6 is a perspective view showing a member of a conventional example.

[Explanation of reference numerals] 1 base, 11 first arm, 2A, 2B side wall member, 21, 85 caulking pin, 22, 52 positioning hole, 23, 32, 53, 73, 83 caulking hole, 24,
41, 74, 84 mounting holes, 3 back member, 31,
51, 72, 82 Protrusions, 4 Covers, 5A, 5B End members, 7A, 7B, 8 Connecting members, 9 Thin steel plates

Claims (2)

[Claims] 1. A method of manufacturing a box-shaped machine component composed of a plurality of members having a flat surface, wherein a positioning hole and a caulking hole are provided in the flat surface of a laminated plate having the shape of the flat surface of each member. Protrusions are provided on the end faces of the laminated plates, a plurality of the laminated plates are laminated, caulking pins are fitted in the caulking holes, and adjacent laminating plates are fixed to each other, whereby the respective members are integrally configured and are orthogonal to each other. The box-shaped machine component is formed by fitting the projection of the member with the positioning hole, fitting the projection in the positioning hole, and then fixing the tip of the projection to the member having the positioning hole by caulking or welding. A method for manufacturing a box-shaped machine component, wherein the box-shaped machine component is formed integrally. 2. The method of manufacturing a box-shaped machine component according to claim 1, wherein the mounting holes formed in the respective members are processed at the same time when the laminated plate is formed.