JPH10141382A - Metallic torque transmission parts and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide metallic torque transmission parts for an internal tooth member or the like that can be easily changed in tooth thickness and reduced in cost while being high in machining accuracy even in the case of increasing tooth thickness so as to be able to maintain high quality. SOLUTION: In this torque transmission part 1, a reference thin plate 2 and a plurality of laminated thin plates 3 provided with serrated holes 21, 31 at the center are laminated in a phase coinciding state, and in this state, a fit-in protruding part 33b of the laminated thin plate 3 is press-fitted into a fit-in through hole 23 of the reference thin plate 2. The fit-in protruding part 33b of the laminated thin plate 3 is press-fitted into a fit-in recessed part 33a of the other adjacent laminated thin plate 3 so as to be integrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal torque transmitting component such as an internal tooth member or a boss member having a deformed shaft hole such as a serration hole, a spline hole, or a keyway, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Heretofore, as a mechanism for transmitting a rotational force, a mechanism in which a metal torque transmitting component such as an internal tooth member having serration teeth on an inner circumference is engaged with a serration shaft in an externally fitted state is known.

[0003] The involute serration teeth such as the above-mentioned internal teeth member are specified by JIS B1602. As a means for machining such serration teeth, there is a gear cutting method by mechanical processing such as broaching, or the like.
A method of manufacturing the internal tooth member itself by sintering is general.

[0004] However, the method of manufacturing internal gear members by gear cutting by machining or sintering has low production efficiency.
Recently, the cost has been increased.
A method of punching a thick plate member of about mm to obtain an internal tooth member having a predetermined thickness has been partially adopted.

[0005] By this fine blanking process, when manufacturing an internal tooth member having a small number of teeth with respect to the inner diameter, that is, a large module and a small tooth thickness (product thickness), a high processing accuracy can be obtained. And high quality products can be obtained.

[0006]

However, although the fine blanking process can be called, as the thickness of the punched material increases or as the tooth shape becomes denser, the processing accuracy decreases. When an internal tooth member with a large thickness and a module as small as 1.0 or less is to be manufactured, sagging of the punched surface becomes large with respect to the plate thickness, and furthermore, the punched surface undergoes breakage such as swelling, and the shear length is increased. As a result, there arises a problem that the effective length of the teeth cannot be sufficiently secured, and a high-quality internal tooth member cannot be obtained.

Further, in order to perform the fine blanking process, expensive and dedicated hydraulic press equipment is required, and there is a problem that the cost cannot be reduced.

Further, when the tooth thickness is changed to a large one, it is needless to say that the punching material also needs to be changed to a thick one in accordance with the tooth thickness. In addition, it is necessary to separately prepare a die such as a punch and a die, and there is a problem that it is very difficult to change a product thickness such as a tooth thickness.

The present invention solves the above-mentioned problems of the prior art, can easily change the product thickness such as changing the tooth thickness, can reduce the cost, and can improve the processing accuracy even when the product thickness such as the tooth thickness is increased. It is an object of the present invention to provide a metal torque transmitting component capable of maintaining high quality and high quality, and a method of manufacturing a metal torque transmitting component capable of manufacturing such a metal torque transmitting component.

[0010]

In order to achieve the above object, a metal torque transmitting component according to the first aspect of the present invention has a non-circular shaped hole in the center, and a fitting concave portion and a convex portion at predetermined positions. In a state where a plurality of metal laminated thin plates provided in such a manner that the parts have a front-to-back relationship with each other are stacked in phase with each other, the fitting convex portion of the laminated thin plate is fitted with another adjacent laminated thin plate. What is press-fitted and integrated into the joint recess is a gist.

Since the metal torque transmitting component of the present invention integrates a plurality of laminated thin plates, the product thickness such as the tooth thickness can be changed only by changing the number of laminated thin plates. . Further, since each thin plate is manufactured by, for example, pressing a thin plate member, high working accuracy can be obtained, and a fitting convex portion formed at a predetermined position of each thin plate is press-fitted into a corresponding concave portion. By doing
Since the thin plates are integrated with each other, the press-fitting enables accurate alignment between the thin plates,
Thin plates can be accurately laminated. As described above, since the torque transmitting component of the present invention is formed by precisely laminating high-precision thin plates, high quality can be obtained, and high quality can be maintained even if the thickness is large.

Further, since the present invention presses a thin plate member, unlike the case of pressing a thick plate member, it does not require expensive hydraulic equipment and the like, and can be sufficiently dealt with by a general-purpose press equipment. be able to.

In the first aspect of the present invention, a reference thin plate having substantially the same configuration as the laminated thin plate except that a fitting through hole is provided instead of the fitting concave portion and the convex portion, In the state where the laminated thin plates arranged at the outermost portion are laminated in phase, the fitting convex portion of the laminated thin plate at the outermost portion is press-fitted into the fitting through hole and integrated. Preferably, a configuration is employed.

That is, in the case of employing this configuration, since the convex portion of the laminated thin plate is not arranged at the end of the product, it is possible to obtain a torque transmitting component having a simple shape without any unnecessary projection such as a convex portion at the end of the product. . Furthermore, since the reference thin plate located at the end of the product does not have a protrusion and does not fit and integrate with other thin plates,
At the time of continuous production, it is possible to surely separate each product with a reference thin plate as a boundary, thereby improving production efficiency.

In the first invention, it is preferable to use the laminated thin plate having a thickness of 0.8 to 1.5 mm.

Further, it is desirable to form the continuous irregular holes of the laminated thin plates as serration holes having serration teeth.

Further, it is more preferable that the serration hole is set such that the module is set to 1.0 or less and the tooth thickness is set to 5 mm or more.

On the other hand, the method for manufacturing a metal torque transmitting component according to the second aspect of the present invention is characterized in that a non-circular shaped hole is provided in the center, and a fitting concave portion and a convex portion are in a predetermined relationship at a predetermined position. A step of obtaining a plurality of metal laminated thin plates provided in the above, and while stacking the plurality of laminated thin plates in phase with each other, the fitting convex portion of the laminated thin plate is used for fitting of another adjacent laminated thin plate. And a step of press-fitting and integrating into the concave portion.

The method for manufacturing a metal torque transmitting component according to the third aspect of the present invention is characterized in that a non-circular shaped hole is provided in the center, and a fitting concave portion and a convex portion are in a predetermined relationship at a predetermined position. Obtaining the provided metal laminated thin plate, and obtaining a plurality of reference thin plates having substantially the same configuration as the laminated thin plate except that a fitting through hole is provided instead of the fitting concave portion and the convex portion; On the reference thin plate, while sequentially stacking the plurality of laminated thin plates in phase with each other, press-fitting the fitting convex portion of the laminated thin plate into the fitting through hole of the reference thin plate to integrate them, and Press-fitting the fitting projection of the laminated thin plate into the fitting recess of the adjacent laminated thin plate and integrating them to obtain a metal torque transmitting component. Continuously obtaining torque transmission parts made of It is the gist.

The manufacturing method according to the second or third aspect specifies one aspect of the manufacturing process of the torque transmission component according to the first aspect, respectively. A torque transmitting component can be obtained.

[0021]

1 to 3 show a metal torque transmitting part (1) such as an internal tooth member according to an embodiment of the present invention.

As shown in these figures, the torque transmitting component (1) of this embodiment is composed of one metal reference thin plate (2) and a plurality of metal laminated thin plates (3).

In each of the thin plates (2) and (3), a serration forming hole (21) which forms a non-circular shaped hole is provided at the center thereof.
(31) is provided, and projections (22) and (32) for fixing at the time of insert molding are formed on the outer periphery along the outer diameter direction. Furthermore, three through holes for fitting (23) are formed at equal intervals along the circumferential direction in the reference thin plate (2) by punching described later, and the laminated thin plate (3) is described later. By the half blanking process, the fitting concave portion (33a) and the convex portion (33b) forming a front and back relationship with each other.
Are formed at equal intervals along the circumferential direction.
The reference thin plate (2) is substantially the same as the laminated thin plate (3) except that a fitting through hole (23) is provided instead of the fitting concave portion (33a) and the convex portion (33b). It has the same configuration.

In this embodiment, each thin plate (2) (3)
It is preferable to use a material having a thickness of 0.5 mm to 2.0 mm, preferably a lower limit of 0.8 mm or more and an upper limit of 1.5 mm or less. That is, if the thickness is too thin, many thin plates (2) and (3) need to be laminated to obtain the torque transmitting component (1) having a predetermined thickness, which may reduce production efficiency. It is not preferable. Conversely, if the thickness is too large, it may be difficult to form each of the thin plates (2) and (3) by press working, which is not preferable.

As the material for the thin plates (2) and (3), any material can be used as long as it is made of metal having a predetermined rigidity. Among them, stainless steel plates (for example, SU
S430) is suitable for applications requiring corrosion resistance because it has good punching workability and appropriate hardness. When strength and toughness are particularly required, a steel plate made of steel for machine structural use such as chromium molybdenum steel may be used.

In this embodiment, a plurality of laminated thin plates (3) are laminated on the reference thin plate (2) in phase with each other, and the protrusions (3) of the laminated thin plate (3) are formed.
3b), while being press-fitted (caulked) into the through hole (23) of the reference thin plate (2), the projection (33b) of the laminated thin plate (3) is Recess (3
The thin plates (2) and (3) are integrated by press-fitting (caulking) into 3a) to form a metal torque transmitting component (1).

In the torque transmitting component (1), the serration holes (11) penetrating along the axial direction by the continuous serration forming holes (21) and (31) of the laminated thin plates (2) and (3). Are formed.

In the present embodiment, the number of laminated thin plates (2) and (3) in the torque transmitting component (1) is set to 3 to 15, preferably the lower limit is set to 5 or more, and the upper limit is set to 10 or less. Is good. That is, if the number of layers is too small,
It is necessary to increase the thickness of each of the thin plates (2) and (3) in order to secure a predetermined product thickness, and press working of each of the thin plates (2) and (3) may be difficult. . Also, if the number of layers is excessively large, there is no particular advantage and disadvantages such as a decrease in production efficiency occur, which is not preferable.

In the present embodiment, the torque transmitting component (1) having the above-described configuration is made into a product as an insert component by resin coating by thermoforming such as injection molding. The resin-coated product is externally engaged with a serration shaft having serration teeth, and is adopted as a torque transmission mechanism in a predetermined device.

On the other hand, in the present embodiment, the torque transmitting component (1) performs three steps of an inner diameter punching step, a fitting part forming step, and an outer punching laminating step on a strip-shaped metal punched material. It is manufactured continuously by repeating it sequentially.

That is, in this embodiment, each station for performing each of the above-described steps is sequentially provided along the conveying path of the punched material.
As shown in the figure, the punched material (1
While a) is being rewound, it is sent to an inner diameter removing station for performing an inner diameter removing step.

Here, a predetermined area of the punching material (1a) is punched to form the serration forming holes (21) (3).
1) is formed. In FIG. 4A, the outlines of the thin plates (2) and (3) are indicated by imaginary lines (FIG. 4B).
The same applies to).

Subsequently, as shown in FIGS. 4B and 6,
The area of the punched material (1a) from which the inner diameter has been removed is sent to the next station, that is, a fitting portion forming station for performing a fitting portion forming step, and a fitting through hole (23) is formed when the reference thin plate is formed. In addition, when forming the laminated thin plate, the fitting concave portion (33a) and the convex portion (33b)
Is formed.

That is, when the fitting through hole (23) is formed, as shown in FIG.
FIG. 6B shows a case in which the punching material (1a) is punched to form the fitting through hole (23) and the fitting recess (33a) and the projection (33b). As shown in the figure, the punching material (1a) is half-punched by the punch (41) so as to be recessed and recessed, and the fitting concave portion (33a) and the convex portion (33) forming a front-back relationship with each other.
b) is formed.

In this embodiment, since the torque transmitting component (1) to be manufactured is composed of a plurality of thin plates (2) and (3) as described above, the thin plate (2)
The number of press strokes corresponding to the number of laminations in (3) is one cycle, and the cycle is repeated. In the first stroke of one cycle, a through hole (23) is formed for forming a reference thin plate, and the remaining number At the time of one stroke, a half-blanked portion is formed for forming a laminated thin plate, and the uneven portion (3
3a) and (33b) are formed.

In this embodiment, the through holes (2
3) and the formation of the uneven portions (33a) (33b) are automatically performed as described below. That is, in this station, the punch (41) is pressed by moving up and down together with the punch holder that holds the punch. In this embodiment, the punch (41) further moves the punch (41) with respect to the punch holder. It is also configured so that it can be driven to advance downward, and its advance driving is controlled by the controller. Then, the controller detects the number of strokes of the punch holder (punch 41) via predetermined detecting means, and outputs a predetermined signal each time the number of strokes reaches a preset number of laminations. ) Is controlled to advance into the punch holder. Thus, for example, in the case of manufacturing a torque transmitting component (1) having five laminated sheets (one reference thin sheet and four laminated thin sheets), the number of laminated sheets is set to “5” in the controller. In the first one of the five press workings, the press is lowered in a state where the punch (41) has largely advanced downward with respect to the holder, and the punching material (1a) is punched out to form the through hole ( 23) is formed, and at the time of the remaining four strokes, the punch (41) is pressed down in a normal advancing state with respect to the holder, the punched material (1a) is half-punched, and the uneven portion (33a) is formed. ) (33b) is formed.

As described above, the fitting through-hole (23) and the fitting concave / convex portions (33a) (33b) are appropriately formed in the same station without changing the press stroke amount of the punch holder.

Next, after the fitting through-hole (23) or the concave / convex portions (33a) (33b) are formed, the punched material (1a) has an outer diameter as shown in FIG. 4 (c) and FIG. It is sent to the outside diameter punching lamination station for performing the punching lamination process.

In this station, the thin plates (2) and (3) are extracted by performing the outer diameter punching, and the thin plates (2) and (3) extracted are laminated and integrated in a predetermined number of sheets.

That is, a predetermined region of the punching material (1a) is arranged so as to correspond to the die hole (52) of the die (51), and in that state the punch (53) descends, and the punching material (1a) Are extracted as thin plates (2) and (3), and the thin plates (2) and (3) are sequentially driven into the die holes (52).

At this time, the first-layer reference thin plate (2) driven into the die hole (52) is held at a predetermined height by frictional resistance with the inner peripheral surface of the die hole (52). 2
The laminated thin plate (3) of the first layer is driven into the die hole (52), and comes into contact with the reference thin plate (2) of the first layer by the pressure of the punch (53). By this abutment, the fitting projection (33b) of the laminated thin plate (3) is moved to the reference thin plate (2).
Press-fit into the fitting through hole (23) of the two thin plates (2)
(3) are laminated and integrated with each other. Subsequently, in the same manner as described above, the third laminated sheet (3) is driven into the die hole (52), and abuts the second laminated sheet (3) at a predetermined pressure. The fitting projections (33b) of the laminated thin plate (3) are press-fitted and integrated with the fitting recesses (33a) of the second laminated thin plate (3). In this way, a plurality of laminated thin plates (3) are sequentially laminated and integrated with one reference thin plate (2) being the lowermost end, and the torque transmitting component (1)
Is formed.

Further, the next reference thin plate (2) is driven into the torque transmitting component (1) formed in the die hole (52) in this manner. Since the fitting through holes (23) are formed at positions corresponding to the portions (33a) and (33b), the reference thin plate (2) is used as the laminated thin plate (3) at the uppermost end of the torque transmitting component (1). It is not integrated with the torque transmission component (1)
Is simply placed in an overlapping state at the upper end of the.

Next, a plurality of laminated thin plates (3) are sequentially driven into the reference thin plate (2) in the same manner as described above, and the laminated thin plate (3) and the reference thin plate (2) are laminated and integrated. Thus, a torque transmission component (1) is newly formed.

As described above, the torque transmitting component (1) in which the thin plates (2) and (3) are laminated and integrated is sequentially manufactured, and is gradually pushed into the lower portion of the die hole (52) to form the die hole (52).
Are discharged one by one from the opening at the lower end.

For reference, five stainless steel thin plates (2) and (3) each having a thickness of 1 mm were laminated by the above-mentioned manufacturing method to form an involute serration hole (nominal diameter 11.5 mm).
mm, number of teeth 11, module 1.0), tooth thickness 5m
A torque transmission part with a tooth thickness of 8 mm was manufactured by laminating eight torque transmission parts with the same thickness as the above (2) and (3), and efficiently producing high quality products with high processing accuracy. Was completed.

As described above, since the torque transmitting component (1) of the present embodiment is formed by laminating and integrating a plurality of thin plates (2) and (3), the lamination of the thin plates (2) and (3) is performed. The product thickness, that is, the tooth thickness, can be easily changed only by changing the number of sheets.

Further, since the thin plates (2) and (3) constituting the torque transmitting component (1) are obtained by pressing a thin plate member, the thin plates (2) and (3) have high processing accuracy. The thin plate (2) and the thin plate (3) are integrated by press-fitting the convex portion (33b) formed at a predetermined position of the thin plate (3) into the concave portion (33a). By the press-fitting, the alignment between the thin plates can be performed accurately, and the thin plates (2) and (3) can be laminated with high accuracy. As described above, since the torque transmitting component (1) of the present embodiment is formed by precisely laminating thin plates (2) and (3) with high accuracy, high quality can be obtained.
Even if the number of layers is increased to increase the tooth thickness, high quality can be maintained. Particularly in this embodiment,
When the tooth thickness of the serration hole (11) is large and a torque transmitting component of a small module, for example, a torque transmitting component having a tooth thickness of 5 mm or more and a module of 1.0 or less is produced, a remarkable effect is exhibited.

Further, in this embodiment, since the reference thin plate (2) is arranged at the end of the thin plates (2) and (3) constituting the torque transmitting component (1), the laminated thin plate is placed at the end of the product. Since the convex portion (33b) of (3) is not arranged, the convex portion (3b) is not provided.
3b) and the like can be formed in a simple shape without unnecessary projections.

In this embodiment, since the laminated thin plates (3) are sequentially laminated and integrated with the reference thin plate (2) at the lowermost end, the sequentially laminated thin plates (2) and (3)
Is reliably separated at the reference thin plate (2), that is, the torque transmitting component (1) is automatically separated and manufactured for each product, so that the production of the torque transmitting component (1) can be efficiently performed. Can do well.

Further, in the present embodiment, unlike a method of pressing a thick plate member such as a fine blanking process, a thin plate member is pressed, so expensive expensive hydraulic press equipment or the like is required. Since it is not necessary and can be sufficiently dealt with by a general-purpose press facility, cost can be reduced.

[0051]

As described above, according to the present invention, since a plurality of laminated thin plates are laminated and integrated to form a metal torque transmitting component, the product can be manufactured simply by changing the number of laminated laminated thin plates. The thickness, for example, the tooth thickness can be easily changed. Furthermore, since each thin plate is manufactured by, for example, pressing a thin plate member, high processing accuracy can be obtained, and by fitting a convex portion formed at a predetermined position of the laminated thin plate into a concave portion by press-fitting, Since the thin plates are integrated, the positioning between the thin plates can be accurately performed by press-fitting, and the thin plates can be stacked with high accuracy. Thus, the torque transmitting component of the present invention
Since high-precision thin plates are laminated with high accuracy, high quality can be obtained, and high quality can be maintained even when the tooth thickness and the like are increased. Also, since the present invention can be manufactured by pressing a thin plate member, unlike the case of pressing a thick plate member, expensive hydraulic press equipment and the like are not required, and a general-purpose press equipment can sufficiently cope. Can,
The effect that the cost can be reduced can be obtained.

In the present invention, when a reference thin plate having a through hole for fitting is arranged at the end of the laminated thin plate, the convex portion of the laminated thin plate is not arranged at the end of the product. Thus, a torque transmitting component having a simple shape without any unnecessary protrusion can be obtained. Furthermore, since the reference thin plate arranged at the end does not have a convex portion and does not fit and integrate with other thin plates,
At the time of continuous production, there is an advantage that it can be automatically separated for each product with a reference thin plate as a boundary, and can be manufactured efficiently.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a metal torque transmitting component according to an embodiment of the present invention.

FIGS. 2A and 2B are views showing a metal torque transmitting component of the embodiment, wherein FIG. 2A is a plan view and FIG. 2B is a cross-sectional view.

FIG. 3 is an exploded sectional view showing a metal torque component of the embodiment.

4A and 4B are views showing a punching material for manufacturing the metal torque transmitting component according to the embodiment, wherein FIG. 4A is a plan view after an inner diameter punching step is completed, and FIG. FIG. 4C is a plan view after the completion of the outer diameter removing step.

FIG. 5 is a cross-sectional view illustrating a punched material for manufacturing the torque transmitting component according to the embodiment in a state after completion of an inner diameter punching step.

FIG. 6 is a view showing a fitting section forming station of the torque transmitting component manufacturing apparatus used in the embodiment, and FIG. 6 (a) is a schematic sectional view showing a state during formation of a fitting through hole;
FIG. 4B is a schematic cross-sectional view showing a state during formation of the fitting concave and convex portions.

FIG. 7 is a schematic cross-sectional view illustrating an outer diameter punching and laminating station of the torque transmitting component manufacturing apparatus used in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Metal torque transmission component 2 ... Reference thin plate 3 ... Laminated thin plate 11 ... Serration hole 21, 31 ... Serration forming hole (irregular hole) 23 ... Fitting through hole 33a ... Fitting concave portion 33b ... Fitting convex portion

Claims (7)

[Claims] 1. A plurality of laminated metal thin plates having a non-circular shaped hole in the center and a fitting recess and a projection provided at predetermined positions in a front-to-back relationship with one another. A metal torque transmitting component wherein the fitting projection of the laminated thin plate is press-fitted and integrated with the fitting concave portion of another adjacent laminated thin plate in the stacked state. 2. A reference thin plate having substantially the same configuration as the laminated thin plate except that a fitting through hole is provided in place of the fitting concave portion and the convex portion, and is disposed at an end portion of the plurality of laminated thin plates. 2. The laminated thin plates to be formed are stacked in phase with each other, and the fitting convex portion of the endmost laminated thin plate is press-fitted into the fitting through hole to be integrated. Metal torque transmission parts. 3. The laminated thin plate has a thickness of 0.8 to 0.8.
3. The metal torque transmitting component according to claim 1, wherein the component is 1.5 mm. 4. The metal torque transmitting component according to claim 1, wherein the continuous irregular holes of the laminated thin plates are formed as serration holes having serration teeth. 5. The metal torque transmitting component according to claim 4, wherein the serration hole is set such that the module is set to 1.0 or less and the tooth thickness is set to 5 mm or more. 6. A step of obtaining a plurality of metal laminated thin plates in which a non-circular shaped hole is provided in the center, and a fitting concave portion and a convex portion are provided at predetermined positions in a front-to-back relationship with each other; Press-fitting the fitting projections of the laminated thin plates into the fitting recesses of the other adjacent laminated thin plates while stacking the laminated thin plates in phase with each other, and integrating them. Manufacturing method of torque transmission parts. 7. A step of obtaining a metal laminated thin plate in which a non-circular shaped hole is provided in the center and a fitting concave portion and a convex portion are provided at predetermined positions so as to have a front-to-back relationship with each other; A step of obtaining a plurality of reference thin plates having substantially the same configuration as the laminated thin plate except that a fitting through-hole is provided instead of the concave portion and the convex portion; and bringing the plurality of laminated thin plates into phase with the reference thin plate, While successively stacking, the fitting convex portion of the laminated thin plate is press-fitted and fitted into the fitting through hole of the reference thin plate to be integrated, and the fitting convex portion of the laminated thin plate is formed of another adjacent laminated thin plate. A step of press-fitting and integrating into the fitting recess to obtain a metal torque transmitting component, wherein the above steps are sequentially repeated to obtain the metal torque transmitting component continuously. Manufacturing method of transmission parts.