JP2001276930A - Press working method for metallic plate member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press working method for metallic plate member which enables forming a more intensive convexity section by press-working in the peripheral side of the metallic plate member. SOLUTION: A convexity tube section 43 through a press drawing work on the central part of the metallic plate member 40 is formed and by press- working the central part of the metallic member, a convexity section 44 is shaped by forming a loosening part caused on the peripheral side of the central part. With a further drawing work against the convexity section 44, an engaged convexity section 29 is shaped and formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press for a metal plate member in which a convex portion is formed at the center of a punched disk by press drawing and a radially extending convex portion is formed on an outer peripheral portion thereof. It relates to a processing method.

[0002]

2. Description of the Related Art Conventionally, for example, a motor device of a power window device for a vehicle for opening and closing a side glass of a vehicle door has been disclosed.
As shown in FIG. 9, a worm fixed to an output shaft (not shown) of the motor main body 50 rotationally drives a worm wheel 51, and the worm wheel 51 rotationally drives an output plate 53 and an output shaft 54 via a rubber damper 52. It has become.

[0003] The worm wheel 51, the output plate 53 and the output shaft 54 are arranged on the same rotation axis. The worm wheel 51 is housed in a wheel housing 55a provided in the gear housing 55, and is rotatably supported by a bearing 56 provided on the upper surface of the bottom plate. The rubber damper 52 is accommodated in an annular damper accommodating portion 51 a that opens above the worm wheel 51. The output shaft 54 is rotatably supported by a shaft hole 56a provided in a bearing portion 56, and supports an output plate 53 disposed in an opening of the damper housing 51a. Then, since each damper portion 52a of the rubber damper 52 is interposed between each engaging portion 51b provided on the worm wheel 51 and each engaging convex portion 53a provided on the output plate 53, the output from the worm wheel 51 is provided. The rotational driving force is transmitted to the plate 53.

The output plate 53 is formed by stamping a metal plate material, and a shaft fitting hole 53b is formed in the center of the output plate 53 by stamping. And
The output shaft 54 and the output plate 53 are connected by fitting the fitting shaft portion 54a provided on the output shaft 54 into the shaft fitting hole 53b. The engaging projection 53a is formed by punching and bending the outer peripheral portion of the output plate 53. Therefore, on the outer peripheral portion of the output plate 53, the engagement convex portion 53 is provided.
A notch 53c is formed by forming a.

When the side glass rises due to the rotation of the motor body 50 and the side glass hits the window frame and the rise is regulated, the rotation of the output plate 53 is regulated and the worm wheel 51 is moved through the rubber damper 52. Rotation is regulated. At this time, an excessive force for stopping the motor main body 50 is absorbed by the rubber damper 52, and the shock generated in the motor main body 50 is buffered.

[0006]

However, in the above-described motor device, when an excessive force is applied to each of the damper portions 52a of the rubber damper 52, each of the damper portions 52a is formed in the cutout portion having the engaging projection 53a. It was elastically deformed so as to enter. This is because the damper portion 52a is not supported by the output plate 53 in the direction of the rotation axis at the portion facing the cutout portion 53c. Then, the damper portion 52a to which the excessive force is applied is elastically deformed in the rotation axis direction,
Excessive force applied to the damper portion 52a in the circumferential direction cannot be sufficiently absorbed. Therefore, there is a problem that the shock generated in the motor main body 50 is not sufficiently buffered.

Therefore, as shown in FIGS. 10 and 11, the engaging projection 5 is formed on the outer peripheral portion of the output plate 53 by press drawing.
7 is conceivable. In this case, since the notch portion is not formed by forming the engagement convex portion 57, the damper portion 52a does not bend and deform in the radial direction.

However, when the engaging projections 57 are formed by press drawing, a tensile stress is applied to a portion of the engaging projections 57 which is formed by the working, so that the thickness of the formed engaging projections 57 is reduced. Is thinner than the thickness of the metal plate member. For this reason, in order to secure the strength of the convex engagement portion 57, it is necessary to use a metal plate member having a larger thickness than now.

However, if the thickness of the metal plate used for punching the output plate 53 is made larger than it is now, the punching becomes difficult, the life of the mold becomes shorter, and the processing accuracy is reduced. Alternatively, it is conceivable to replace the metal sheet material with higher strength while keeping the sheet thickness as it is. However, also in this case, there is a problem that press punching becomes difficult, the life of the mold becomes shorter, and the material cost becomes higher.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its object is to use a metal plate member which is the same as or thinner than the conventional one, and furthermore, the outer periphery of the metal plate member can be used. It is an object of the present invention to provide a method of pressing a metal plate member, which can form a convex portion having higher strength in the portion by press processing.

[0011]

In order to solve the above problems, according to the first aspect of the present invention, a drawn portion is formed in a central portion of a metal plate by press drawing, and the central portion is pressed and drawn. In this case, a convex portion is formed by forming a slack generated on the outer peripheral side of the central portion.

According to a second aspect of the present invention, in the first aspect of the present invention, the throttle portion is moved from the projecting side to the opposite side by pressing the narrowed portion to a position overlapping the outer peripheral portion. .

According to a third aspect of the present invention, in the first or second aspect of the present invention, a through hole is punched in the narrowed portion, and an engaging groove extending in the center axis direction is formed on the inner periphery of the narrowed portion. It is characterized in that it is formed on a surface.

According to a fourth aspect of the present invention, in the first or second aspect of the present invention, a cylindrical through hole is punched in the narrowed portion. The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the convex portion extends from a central portion side of the metal plate member to an outer peripheral edge, and is more outer peripheral side. It is characterized in that it is formed in a rib shape whose width becomes wider as it becomes.

(Operation) According to the first aspect of the present invention,
There is a tendency that the wall thickness of the convex portion becomes thicker,
Further, since the tensile stress accompanying the molding process is hardly applied, the thickness of the formed convex portion is not easily reduced. As a result, the thickness of the formed convex portion is not easily reduced, so that a convex portion having higher strength can be formed on the outer peripheral portion of the metal plate member by pressing.

According to the invention described in claim 2, according to claim 1
In addition to the effect of the invention described in the above, the throttle portion can be formed so as to overlap the outer peripheral portion of the metal plate member. As a result, the throttle portion can be prevented from protruding from the metal plate member as much as possible.

According to the third aspect of the present invention, the first aspect is provided.
Alternatively, in addition to the function of the invention described in claim 2, a through hole through which a shaft can be connected to the metal plate member can be easily formed in the throttle portion.

According to the invention of claim 4, according to claim 1,
Alternatively, in addition to the function of the invention described in claim 2, a through hole that can penetrate the shaft in the metal plate member can be easily formed in the throttle portion.

According to the invention of claim 5, according to claim 1,
In addition to the effect of the invention according to any one of claims 4 to 4, the slack amount that is larger on the outer peripheral side is formed into a rib-shaped convex portion that has a larger width on the outer peripheral side. Therefore, it is difficult to vary the thickness of the convex portion. As a result, the rib-shaped convex portions can be formed with higher strength.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied as a component of a motor device of a power window device for a vehicle will be described below with reference to FIGS.

As shown in FIG. 3, the motor device 1 includes a motor body 10 and a speed reduction unit 11. Motor body 10
Has an output shaft (not shown) extending toward the speed reduction unit 11. The reduction unit 11 includes a gear housing 12, a worm wheel 13, a rubber damper 14, an output plate 15, and an output shaft 16.
And a lid 17 and the like.

The gear housing 12 is integrally formed of a synthetic resin and includes a motor fixing portion 12a, a worm housing portion 12b, and a wheel housing portion 12c. Motor fixing part 12
The motor body 10 is fixed to a, and the output shaft thereof extends into the worm housing 12b. A worm gear (not shown) is fixed to the output shaft, and a part of the worm gear is disposed in the wheel housing 12c.

The wheel accommodating portion 12c is formed in a substantially cylindrical shape with a bottom, and the cylindrical bearing portion 1 is provided at the center on the upper surface of the bottom plate portion.
8 are formed. The bearing portion 18 has a concave portion 18a formed on the upper end surface thereof and a shaft hole 18b formed in the central axis direction. Also, the wheel housing 12
On the upper surface of the bottom plate portion c, a plurality of convex support portions 19 are formed at equal angular intervals along the circumference of a circle centered on the central axis of the bearing portion 18. The worm wheel 13 is housed in the wheel housing 12c.

The worm wheel 13 is integrally formed of a synthetic resin into a substantially cylindrical shape having a bottom, and a gear portion 20 meshing with the worm gear is formed on the outer peripheral surface thereof. A shaft hole 21 is formed in the center of the worm wheel 13 so as to penetrate the worm wheel 13 in the center axis direction. An annular groove-shaped damper accommodating portion 22 that opens upward is formed between the gear portion 20 and the shaft hole 21.

On the upper surface of the bottom plate of the damper accommodating portion 22, three engaging portions 23 are formed. The engaging portions 23 are provided at equal angular intervals and are formed so as to extend in the radial direction with respect to the center axis of the shaft hole 21. Each engaging portion 23 divides the damper accommodating portion 22 into three substantially fan-shaped portions centered on the central axis. In addition, on the upper surface of the bottom plate portion of the damper accommodating portion 22, there is formed a ridge portion 24 extending along the circumference of a circle centered on the central axis. Then, the worm wheel 13 has the bearing portion 18 inserted into the shaft hole 21 thereof,
Each convex support portion 19 abuts on the lower surface of the bottom plate portion so as to be rotatably housed in the wheel housing portion 12c. or,
The worm gear arranged in the damper accommodating portion 22 meshes with the gear portion 20. That is, the worm wheel 13 is rotatably housed in the wheel housing 12c with the respective central axes of the bearing portion 18 and the shaft hole 21 as their rotation axes. The rubber damper 1 is provided in the damper housing 22.
4 are accommodated.

The rubber damper 14 is integrally formed in an annular shape,
It has six damper portions 25 formed in a substantially fan shape.
Each of the damper portions 25 is annularly connected by a connecting portion 26 on the inner peripheral side. The rubber damper 14 is accommodated in each chamber of the damper accommodating portion 22 in which two adjacent damper portions 25 are partitioned by the respective engaging portions 23. or,
Adjacent damper units 25 housed separately in adjacent rooms
The engaging portions 23 are respectively fitted between them. The rubber damper 14 is supported by a ridge 24 that abuts the lower surface of each damper part 25 at substantially the center in the radial direction. The output plate 15 is disposed above the rubber damper 14.

The output plate 15 is formed in a substantially disc shape by stamping a metal plate material. Figures 1, 2 and 4
As shown in the figure, at the center of the output plate 15, the output shaft 16
Are formed by press drawing and punching. The shaft fitting portion 28 has a shaft fitting hole 28a as a substantially cross-shaped through hole (a cross section orthogonal to the center axis) penetrating in the center axis direction of the output plate 15. The shaft fitting hole 28a is formed by four engagement grooves 28b whose inner peripheral surface extends in the central axis direction.

The outer peripheral portion of the output plate 15 is formed as a convex portion projecting axially downward with respect to the central axis.
Two engaging projections 29 are formed by press working. The engaging projections 29 are provided at equal angular intervals, extend in the radial direction with respect to the central axis to the outer peripheral edge of the output plate 15, and are formed in a rib shape whose width becomes wider toward the outer peripheral side. I have. Each engagement projection 29 is formed so as to be able to engage with the damper section 25 of the rubber damper 14 in the circumferential direction with respect to the center axis.

On the lower surface of the output plate 15, there is formed a ridge 30 extending along a circle centered on the central axis. Then, the output plate 15 is accommodated in the opening of the damper accommodating portion 22 in a state where the ridge portion 30 is in contact with the upper surface of each damper portion 25. At this time, each engaging projection 29 is fitted into a gap between the two damper sections 25 housed in each chamber of the damper housing section 22. Further, a lower portion of the shaft fitting portion 28 is disposed in the concave portion 18 a of the bearing portion 18.

The output shaft 16 is formed with a fitting shaft portion 32 having a substantially cross section (a cross section perpendicular to the center axis) in a cross section above the shaft portion 31. The fitting shaft portion 32
The output plate 15 is formed so as to fit into the shaft fitting hole 28a of the shaft fitting portion 28. The output shaft 16 has a shaft portion 3
A gear section 33 meshed with a gear section of a drive member, which is a component of a window regulator (not shown), is provided below 1. The output shaft 16 has a shaft portion 31 rotatably supported by a shaft hole 18 b of the bearing portion 18, and a fitting shaft portion 32 fitted into a shaft fitting hole 28 a of a shaft fitting portion 28.
The output shaft 16 is provided with an E-ring 34 in a circumferential groove 32a provided at the upper end of the fitting shaft portion 32 projecting upward from the shaft fitting portion 28.
Is fixed so as not to fall out of the shaft fitting portion 28 and the shaft hole 18b by being engaged. An O-ring 3 for sealing between the shaft 31 and the shaft hole 18b is provided on the shaft 31 of the output shaft 16.
5 is mounted.

The lid 17 is fixed to the gear housing 12 so as to cover the upper opening of the wheel accommodating portion 12c. Next, the pressing process of the output plate 15 is shown in FIG.
This will be described with reference to FIG.

First, a disk-shaped metal plate member 40 for forming the output plate 15 is punched out of, for example, a roll-shaped metal plate material. Next, as shown in FIGS. 5A and 5B, the metal plate member 4 is formed by using an upper mold 41 and a lower mold 42.
A convex cylindrical portion 43 as a drawn portion is formed at the center of the “0” by press drawing. The convex cylindrical portion 43 is provided for forming the shaft fitting portion 28.

Further, in this step, the slack generated on the outer peripheral side of the central portion of the metal plate member 40 is formed in the concave portion 42 a provided in the lower mold 42 to form the convex portion 44. That is, when the central portion of the metal plate member 40 is drawn, a radial tensile stress acts on the outer peripheral side of the central portion. It is known that the tensile stress generates a compressive stress in a direction orthogonal to the radial direction, and causes the outer peripheral portion to loosen in the same direction. In the present invention, by providing the concave portion 42a in the lower mold 42, the slack is generated in the concave portion 42a. And
The generated slack is formed into the convex portion 44 by the concave portion 42a. The concave portion 42a is formed so as to extend in the radial direction with respect to the central axis of the metal plate member 40, and is formed in a groove shape whose width becomes larger toward the outer peripheral side. The concave portion 42a forms a rib-shaped convex portion 44 extending in the radial direction with respect to the center axis and having a larger width toward the outer peripheral side.

Next, as shown in FIGS. 6A and 6B,
Using the upper mold 45 and the lower mold 46, the convex cylindrical portion 43
Is drawn so that its diameter becomes smaller. At the same time, the convex portion 44 is pressed by the convex portion 45a provided on the upper mold 45 and the concave portion 46a provided on the lower mold 46 such that the width of the convex portion 44 becomes smaller.

Next, as shown in FIGS. 7A and 7B,
Using the upper mold 47 and the lower mold 48, the convex cylindrical portion 43
Is drawn so that its diameter is further reduced. At the same time, the convex portion 44 is pressed by the convex portion 47a provided on the upper mold 47 and the concave portion 48a provided on the lower mold 48 so that the width thereof is further reduced.

Next, the convex cylindrical portion 43 is pressed downward,
As shown in FIG. 8, the convex cylindrical portion 43 is moved to a position overlapping the outer peripheral portion in the rotation axis direction. This processing is performed, for example, by forming a concave portion having an inner diameter corresponding to the central portion of the metal plate member 40 in a lower mold (not shown) and pressing down the convex cylindrical portion 43 by the upper mold. By this step, the metal plate member 40 is formed into a shape close to the final shape of the output plate 15.

Finally, the convex cylindrical portion 4 of the metal plate member 40
As shown in FIG. 4, a fitting portion 28 having a shaft fitting hole 28a having an engagement groove 28b on the inner peripheral surface is formed by performing press drawing and punching on 3.

The output plate 15 is formed by the above steps. The operation and effects of the present embodiment described in detail above are listed. (1) In the present embodiment, the convex cylindrical portion 43 for forming the shaft fitting portion 28 is formed by press drawing at the center of the metal plate member 40 for forming the output plate 15.
Then, the slack generated on the outer peripheral side of the central portion by the drawing process is formed into a convex portion 44 by dies 41 and 42, and the convex portion 44 is stepwise formed by the dies 45, 46, 47 and 48. Molding was performed to form the engaging projection 29. Therefore, when the engaging projection 29 is formed, the thickness of the wall portion serving as the engaging projection 29 tends to be larger, and the pulling force accompanying the forming process is less likely to be applied. Is difficult to be thin. As a result, the same or thinner metal plate member 40 as the conventional one can be used, and the metal plate member 40
An engaging projection 29 having a higher strength can be formed on the outer peripheral portion by pressing. Further, even when the engaging projection 29 is formed to be higher, it is not necessary to use a metal plate having a larger thickness in order to secure a greater strength, since the thickness is hardly reduced. Therefore, the output plate 1
5 can be reduced, and material cost can be reduced.

(2) In addition, in this embodiment, after forming the convex cylindrical portion 43 by drawing to press the central portion of the metal plate member 40 upward, the convex cylindrical portion 43 is pressed downward to form the outer periphery. It was moved to the position where it overlaps the part. Therefore, the shaft fitting portion 28 formed from the convex cylindrical portion 43 is formed in a state in which the shaft fitting portion 28 does not protrude from the output plate 15 as much as possible. For this reason, the size in the rotation axis direction at the center of the output plate 15 can be reduced to about the size of the shaft fitting portion 28.

(3) In addition, in this embodiment, the shaft fitting hole 28a is punched into the convex cylindrical portion 43, and the engaging groove 28b extending in the center axis direction is formed in the inner peripheral surface of the shaft fitting hole 28a. Was formed. Therefore, the fitting shaft portion 3 of the output shaft 16
The shaft fitting hole 28a provided with the engaging groove 28b to which the two 2 can be connected can be easily formed only by pressing.

(4) In addition, in the present embodiment, the engaging projection 29 is formed in a rib shape extending radially from the center portion of the output plate 15 to the outer peripheral edge, and the width thereof becomes wider toward the outer peripheral side. Formed. Therefore, the slack that is larger on the outer peripheral side is formed into the rib-shaped engaging convex section 29 that has a larger width on the outer peripheral side.
It is difficult to vary the wall thickness. As a result, the rib-shaped engagement projections 29 can be formed with greater strength.

(5) In addition, in this embodiment, the convex portion 4
4 with a plurality of molds 41, 42, 45, 46, 47, 48
To form the engaging projection 29. Therefore,
It is difficult for excessive tensile stress accompanying molding to be applied to the slack of the outer peripheral portion formed in the convex portion 44, and the thickness of the convex portion 44 becomes closer to the thickness of the metal plate member 40, so that the strength is further improved. A large engaging projection 29 can be formed.

Hereinafter, embodiments of the invention other than the above-described embodiment will be listed. In the above embodiment, the shaft fitting hole 28a whose inner peripheral surface is formed by the engagement groove 28b is formed in the output plate 15, but a cylindrical through hole may be simply formed.

In the above embodiment, the shaft fitting portion 28 is
After forming the convex cylindrical portion 43 by drawing to press the central portion of the metal plate member 40 upward, the convex cylindrical portion 43 was pressed downward and moved to a position overlapping the outer peripheral portion. Alternatively, a convex cylindrical portion may be formed by drawing to press the central portion of the metal plate member 40 only upward or downward, and the convex cylindrical portion may be formed into a shaft fitting portion at that position.

In the above embodiment, the output plate 15 provided with the rib-shaped engaging projections 29 extending from the central portion side to the outer peripheral edge in the radial direction with respect to the central axis line was processed. The present invention may be applied to the processing of a metal plate member provided with a pointed convex portion near the center or on the outer peripheral edge.

In the above embodiment, the circular plate-like output plate 15 is formed from the metal plate member 40 punched in a circular shape from the roll material.
Was carried out when processing
Output plate 1 from a metal plate member punched into a regular polygon or other shape
It may be carried out when processing a metal plate product other than 5, for example, a clutch plate.

Hereinafter, the technical ideas grasped from each of the above embodiments will be described together with their effects. (1) The method according to any one of claims 1 to 5, wherein the convex portion is formed stepwise by a plurality of different molds. . According to such a configuration, it is difficult for excessive tensile stress accompanying molding to be applied to the slack of the outer peripheral portion formed in the convex portion, and the thickness of the convex portion becomes closer to the plate thickness of the metal plate member. Thus, it is possible to form a convex portion having even greater strength.

[0048]

According to the first to fifth aspects of the present invention, the thickness of the convex portion to be formed is not easily reduced, so that the same or a thinner metal plate member as in the related art can be used. ,
In addition, a convex portion having higher strength can be formed on the outer peripheral portion of the metal plate member by pressing.

[Brief description of the drawings]

FIG. 1 is a perspective view of an output plate.

FIG. 2 is a perspective view of an output plate.

FIG. 3 is a schematic exploded perspective view of a motor device.

FIG. 4 is a sectional view of an output plate.

FIG. 5A is a perspective view showing a metal plate member being processed;
(B) is sectional drawing which shows the metal plate member and both dies which are being processed.

FIG. 6A is a perspective view showing a metal plate member being processed.
(B) is sectional drawing which shows the metal plate member and both dies which are being processed.

FIG. 7A is a perspective view showing a metal plate member being processed;
(B) is sectional drawing which shows the metal plate member and both dies which are being processed.

FIG. 8 is a schematic sectional view showing a metal plate member being processed.

FIG. 9 is an exploded perspective view showing a conventional motor device.

FIG. 10 is a perspective view of an output plate.

FIG. 11 is a perspective view of an output plate.

[Explanation of symbols]

28a: shaft fitting hole as a through hole, 28b: engagement groove, 2
9: engagement projections as projections; 43, projection cylinders as throttles; 44, projections; 49, annular grooves.

Continuing on the front page (72) Inventor Shinsuke Muroi 390 Umeda, Kosai-shi, Shizuoka Asmo Co., Ltd. (72) Inventor Shinji Noguchi 202, Higashiwaki, Nishiyukicho, Toyohashi-shi, Aichi F-term (reference) 4E048 AB03

Claims (5)

[Claims] 1. A drawn portion (43) is formed in a central portion of a metal sheet material by press drawing, and a slack generated on an outer peripheral side of the central portion is formed by press drawing in the central portion to form a convex portion. A method for pressing a metal plate member, comprising forming a portion (29). 2. The method according to claim 1, wherein the squeezed portion (43) is pressed from the projecting side to the opposite side and moved to a position overlapping with the outer peripheral portion. . 3. A through hole (28a) is formed in the throttle section (43).
3. The method of pressing a metal plate member according to claim 1 or 2, wherein an engaging groove (28b) extending in the center axis direction is formed on an inner peripheral surface of the metal plate member. 4. The method according to claim 1, wherein a cylindrical through hole is punched in the narrowed portion. 5. The convex portion (29) is formed in a rib shape extending from a central portion side to an outer peripheral edge of the metal plate member, and the width thereof becomes wider toward the outer peripheral side. The method for pressing a metal plate member according to any one of claims 1 to 4.