JP2003053588A - Press machine and pressing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press machine and a pressing method which obtains a big press force with a small pressurizing force. SOLUTION: This press machine 10 is provided with an upper die 11 having a pressing surface 12 on the lower surface, a lower die 13 having a pressing surface 14 on the upper surface and having inclined surfaces 15a, 15b which rise according as going outward, plural pieces of cam dies 16a, 16b which have inclined surfaces 17a, 17b on the upper surface and are slidingly inserted into the lower part of the lower die 13 and a frame die 18 which surrounds the upper die 11, the lower die 13 and the cam dies 16a, 16b. Further, in this pressing method, a member 19 to be pressed is arranged between the pressing surface 12 of the upper die 11 and the pressing surface 14 of the lower die 13, the cam dies 16a, 16b are slidingly inserted into the lower side of the lower die 13, the lower die 13 is elevated and, thereby, the member 19 to be pressed is pressed with a pressing force F which is larger than the force W applied to the cam dies 16a, 16b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing apparatus and a pressing method, and more particularly to a pressing apparatus suitable for manufacturing a ring-shaped plate member such as a plate or a friction plate in an automatic transmission installed in a transmission of an automobile. And a pressing method using the same.

[0002]

2. Description of the Related Art Plates and friction plates in an automatic transmission mounted on a transmission of an automobile are ring-shaped used to rotate a clutch side and a gear side synchronously in order to prevent a shock at the time of gear change. It is a plate member of.

Such a ring-shaped plate member is obtained, for example, by punching a steel plate material into a ring shape by a pressing machine or by coiling a steel plate band material so that the wide surfaces are located on the same plane, and thereafter, It is manufactured by cutting every turn and welding the cut ends.

When the steel plate material is punched out by the former press machine, a large amount of waste material is generated, resulting in a large amount of material loss, which is disadvantageous in terms of cost. On the other hand, in the latter method of coiling the strip made of steel plate so that the wide surface is located on the same plane, and welding after cutting, a deformed cross-section material such as a rectangular cross-section is used as the raw material, so the material cost is relatively high. It is necessary to remove the weld overlay caused by welding by finishing such as cutting or buffing.

A ring-shaped plate member whose both ends are not welded does not require finishing, but when used in a high-speed rotating application such as a friction plate incorporated in a transmission, centrifugal force causes Expands and deforms outward, and the outer diameter side end is
This is not desirable because it may cause contact with other parts.

[0006] Therefore, the applicant of the present invention firstly bends a steel wire rod having a circular cross-section into a ring shape, a step of cutting the steel wire rod into each winding unit length, and the ring shape. The step of welding both ends of the steel wire rod to obtain a ring member having a circular cross section, the step of pressing the ring member in the winding axis direction to obtain a ring-shaped plate material having a predetermined thickness, and the ring-shaped plate material A method for manufacturing a ring-shaped plate member having a step of punching the inner diameter portion or the outer diameter portion to obtain a ring-shaped plate member having a predetermined shape (Japanese Patent Laid-Open No. 2000-42647).

The method for manufacturing a ring-shaped plate member disclosed in Japanese Unexamined Patent Publication No. 2000-42647 does not generate punching scraps and has a circular sectional shape as compared with a method of punching a steel plate material. Since the wire material is used as the raw material, the material cost is lower than that using the deformed cross-sectional material with a rectangular cross section as the raw material, and the weld overlay is pressed to the same thickness as the ring-shaped plate member. Since it is shaped, it has various features such as finishing work such as cutting and buffing is not required.

[0008]

By the way, when a ring-shaped plate member is manufactured by the above method, for example, a plate in an automatic transmission of an automobile or a friction plate has an outer diameter of φ150 mm and an inner diameter. When manufacturing a ring-shaped plate member with a diameter of 120 mm and a thickness of 2 mm, a press machine of 1,500 t class is required, and it requires a large installation space and is expensive. There was a problem that it was difficult to install and install and manufacture.

Therefore, the present invention provides a pressing apparatus and a pressing method capable of manufacturing a plate in an automatic transmission of an automobile or a ring-shaped plate member such as a friction plate with a small and inexpensive pressing apparatus. With the goal.

[0010]

According to a first aspect of the present invention, there is provided a press machine having a first press die having a press face on one side, and a first press die having one face formed on an inclined face and the other face having the first face. Second press die having a press surface opposite to the press surface of the second press die, and a surface on the second press die side which is arranged on one side of the second press die and is an inclined surface of the second press die. And a frame die surrounding the first press die, the second press die and the cam die.

That is, in the above-described pressing device, the cam die having the inclined surface corresponding to the inclined surface is slidably inserted into the inclined surface side of the second press die having the inclined surface on one side. The second press die is moved toward the first press die to press the member to be pressed arranged between the press surface of the first press die and the press surface of the second press die. It was done.

Here, if the inclination angle of the inclined surfaces of the second press die and the cam die is θ, the force pressing the cam die is W, and the pressing force of the pressed member is F, the pressing force F is Given by the formula.

[0013]

[Formula 1]

According to the above-described pressing device, a large pressing force F can be obtained on the second pressing mold by applying a relatively small force W to the cam mold, so that the pressing device is small and inexpensive. It becomes possible to manufacture ring-shaped plate members such as plates and friction plates in automatic transmissions of automobiles. Therefore, it becomes possible for a small and medium-sized press supplier to install and install the pressing device to manufacture the ring-shaped plate member. Further, even a small and medium-sized press contractor who has only a small-sized and inexpensive press device can similarly manufacture the ring-shaped plate member.

According to a second aspect of the present invention, there is provided the press device according to the second aspect.
The lubricant is interposed between the inclined surfaces of the press type and the cam type.

According to the above-mentioned pressing apparatus, since the lubricant is interposed between the inclined surfaces of the second press die and the cam die, the friction resistance between the second press die and the cam die is small, and the cam die is small. Can be smoothly slid and inserted into one side of the second press die, and wear of the inclined surfaces of the second press die and the cam die is reduced, so that the life of the press device can be extended.

According to a third aspect of the present invention, there is provided the press device according to the first aspect.
Either one or both of the press die and the second press die has a shaping portion for shaping the member to be pressed.

According to the above-described pressing apparatus, when the member to be pressed is press-molded, the press-molded product can be simultaneously processed according to the shape of the shaping portion, and additional processing after pressing can be omitted. be able to.

According to a fourth aspect of the present invention, there is provided a first pressing die having a pressing surface on one surface, and an inclined surface on one surface and the pressing surface of the first pressing die on the other surface. A member to be pressed is disposed between the second press die and a second press die having a press face opposite to the second press die, and one side of the second press die has an inclined surface that matches the inclined surface of the second press die. By sliding the formed cam mold,
It is characterized in that the member to be pressed is pressed with a pressing force larger than the pressing force of the cam mold.

According to the above pressing method, a large pressing force can be generated in the second press die by slidingly inserting the cam die into one side of the second press die with a relatively small force. Even small and medium-sized press contractors who can only install and install compact and inexpensive press devices, or small and medium-sized press contractors who have only small and inexpensive press devices can use plates and friction in the automatic transmission of automobiles and friction. It becomes possible to manufacture a ring-shaped plate member such as a plate.

According to a fifth aspect of the present invention, in the pressing method, the member to be pressed is a ring wire formed by molding a metal wire having a circular cross section into a ring shape, and the press-molded product is a ring-shaped plate member. It is a feature.

According to the above-mentioned pressing method, a ring-shaped plate member is manufactured by press-molding a ring wire rod wound with a metal wire having a circular cross-sectional shape. Does not occur and material loss does not occur, and a raw material with a rectangular cross-section is used compared to a method in which a strip with a rectangular cross-section is coiled on its wide surface and then cut Because it does not, the raw material cost will be lower and the cost can be reduced.

In the pressing method according to a sixth aspect of the present invention, the member to be pressed is a ring-shaped member obtained by welding both ends of a ring wire formed by bending a steel wire having a circular cross section into a ring shape. It is what

According to the above pressing method, since a steel wire rod having a circular cross section is used as a raw material, punching scraps are not generated as in the above case, and a comparison is made when a raw material having a rectangular cross section is used. Then, the material cost can be reduced. Moreover, since both ends of the ring wire are welded in advance and pressed, the weld overlay by welding is pressed at the same time as the press and has the same thickness as the press-formed product. No need for complicated finishing.

The pressing method according to claim 7 is the first
And a second press die, one or both of which has a shaping portion for shaping the member to be pressed, and at least a part of the press-formed product is shaped by the shaping portion. It is characterized by.

According to the above-described pressing method, by providing the shaping portion having an arbitrary shape, it is possible to simultaneously perform shaping processing according to the shape of the shaping portion at the time of pressing, and it is not necessary to perform shaping by additional processing.

In the pressing method according to the eighth aspect, the shaping portion is formed of an uneven tooth shape, and the uneven tooth portion is formed on one or both of the inner peripheral portion and the outer peripheral portion of the ring-shaped plate member. Is formed.

According to the above-mentioned pressing method, since the shaping portion can form the toothed portion having an uneven shape on either or both of the inner peripheral portion and the outer peripheral portion of the ring-shaped plate member, for example, in an automobile. A ring-shaped plate member having a tooth profile on one or both of the inner peripheral surface and the outer peripheral surface, such as a plate or a friction plate in an automatic transmission in a trans mission, can be manufactured by one pressing step. .

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION A pressing apparatus and a pressing method according to an embodiment of the present invention will be described below with reference to the drawings. 1A is a vertical cross-sectional view showing a part of the press device 10 in a cross section, and FIG. 1B is a cross-sectional view taken along line AA in the press device 10 of FIG. 1A. It is a figure. 1A and 1B, a press device 10 includes an upper mold 11 which is a first press mold having a press surface 12 on a lower surface,
A lower die 13 that is a second press die having a press surface 14 on the upper surface and inclined surfaces 15a and 15b that rise from the central portion toward both sides on the lower surface, and a lower die located below the lower die 13. The inclined surface 17 that corresponds to the inclined surfaces 15a and 15b of 13
a pair of cam molds 16a and 16b having a and 17b slidably inserted below the lower mold 13, and these upper molds 11,
Frame die 1 for holding the lower die 13 and the cam dies 16a, 16b
8 and.

Inclined surfaces 15a and 15b of the lower mold 13,
The inclined surfaces 17a and 17b of the cam dies 16a and 16b are formed at the same inclination angle θ, and the friction resistance is reduced by mirror finishing.

The upper die 11, the lower die 13 and the cam dies 16a, 16b are formed of die steel (SKD11) which is hard to be damaged by pressing, and the frame die 18 is formed of tool steel (SK), for example. Is formed by.

The pressing surface 12 of the upper die 11 and the lower die 13
The member to be pressed 19 is arranged between the pressed surface 14 and the pressed surface 14. This pressed member 19 is, for example, as shown in FIG.
As shown in (a), the cross-sectional shape is circular, for example, S10.
The steel wire rod 1 made of C is used as a raw material. Since the steel wire rod 1 having a circular cross section is an ordinary steel wire rod, the material cost is lower than that of a steel plate material or a strip material having a rectangular cross section, and the raw material cost can be reduced.

FIG. 3 (a) is a front view of a ring wire rod manufacturing apparatus 20 for manufacturing a ring wire rod using the above-mentioned steel wire rod 1,
FIG. 3B is a side view. In FIGS. 3A and 3B, reference numeral 21 denotes a steel wire rod 1 having a circular cross-section, which is wound in a spool shape, and is placed on a rotary table 22. Reference numeral 23 denotes two pairs of feed rollers, each of which is a pair of two continuously feeding the steel wire rod 1 or intermittently by a predetermined size.
Reference numeral 24 is a guide for guiding the sent steel wire rod 1 to a predetermined position, 25 and 25 are bending rollers for winding the steel wire rod 1 sent out from the guide 24 in a ring shape, and 26 is a cooperation with the bending rollers 25 and 25. A core metal that works to wind the ring wire rod 2 having a predetermined inner diameter dimension and an outer diameter dimension, and 27 is a cutter that cuts the ring wire rod 2 wound to a predetermined dimension every one turn.

Before explaining the operation of the pressing apparatus 10, the operation of the ring wire manufacturing apparatus 20 will be described. By rotating the turntable 22,
The steel wire 1 is pulled out from the spool 21 placed on the rotary table 22 by the feed roller 23, and passes through the guide 24 using the bending rollers 25, 25 and the core metal 26 to obtain a predetermined inner diameter and outer diameter. The ring wire 2 having a diameter is bent. At the time of this bending process, the rigidity of the steel wire rod 1 can be improved by setting the three positions of the bending rollers 25, 25 and the core metal 26 as appropriate without using a drum as a core for the bending process. Utilizing this, the ring wire 2 having a perfect circle shape having these three points as inscribed circles can be wound and formed. 3A and 3B show the case where the ring wire 2 is formed in the vertical direction (the winding axis is the horizontal direction), the ring wire 2 is formed in the horizontal direction (the winding axis is the vertical direction). You may do it.

In this way, each time the ring wire rod 2 obtained by bending the steel wire rod 1 is wound by one turn, the cutter 27
2B, a ring wire 2 is formed, and both ends 2a, 2a of the ring wire 2 are resistance-welded (butt welded) 3 to each other, as shown in FIG. 2C. Thus, the ring-shaped member 4 continuous in the circumferential direction is formed by the welded portion 3. The ring-shaped member 4 formed in this manner has a cross-sectional shape taken along the line AA in FIG.
As shown in (d), a weld overlay is formed on the welded portion 3.

Next, a pressing method by the pressing device 10 will be described. First, the cam molds 16a and 16b
To the left and right sides of FIGS.
3 by lowering the press surface 12 of the upper mold 11.
As shown in FIG. 4A, a gap is formed between the press surface 14 of the lower die 13 and the press surface 14 of the lower die 13, and a member to be pressed 19 (a ring-shaped member) is pressed on the press surface 14 of the lower die 13. 4) is fed from the lateral direction.

Next, the cam molds 16a, 1 are provided below the lower mold 13.
6b is laterally pressed by a hydraulic press or the like to be slid and inserted. Then, these cam molds 16a, 16
The lower die 13 is lifted by the cam action of the slidable surfaces 17a and 17b on the upper surface of b and the slanted surfaces 15a and 15b of the lower die 13 corresponding to the lower surface, so that the lower die 13 is raised and the press surface 12 and the lower surface of the upper die 11 are lowered. The member to be pressed 19 (4) supplied between the press surface 14 of the mold 13 and the press surface 14 is pressed by both press surfaces 12 and 14.

Now, the inclined surfaces 15a, 1 of the lower mold 13 are now
5b and the inclined surfaces 17a, 17b of the cam dies 16a, 16b
If the frictional resistance of the lower mold 13 is ignored, the inclined surfaces 15a, 1 of the lower mold 13
5b and the inclined surfaces 17a, 17b of the cam dies 16a, 16b
The angle of inclination with θ and the pressing force of the cam dies 16a, 16b by W
And the pressing force of the pressed member 19 (4) is F, the pressing force F of the pressed member 19 (4) is given by the following equation.

[0039]

[Formula 2]

That is, by appropriately setting the inclination angle θ, the pressing force F of the member to be pressed 19 (4) is
Reaches 7 to 10 times the pressing force W of the cam dies 16a and 16b. Therefore, for example, with a 150 t press machine, a press force F comparable to that of a 1,050 t-1,500 t class press machine can be obtained.

In this way, the pressing surface 12 of the upper die 11
The member to be pressed 19 (4) supplied between the pressing surface 14 of the lower mold 13 and the lower mold 13 is pressed by both pressing surfaces 12 and 14, and is shown in FIGS. 4 (b) and 5 (a) (b). As shown
A ring-shaped plate member 30 having a predetermined inner diameter dimension Di, outer diameter dimension Do and thickness dimension t is obtained.

In this ring-shaped plate member 30, the member to be pressed 19 (4) is welded 3 as shown in FIG. 2 (d).
The member to be pressed 1 even if it has a weld overlay on the
Since the weld overlay is also pressed at the same time when pressing 9 (4), the inner diameter dimension Di, the outer diameter dimension Do, and the thickness dimension t are as shown in FIGS. It is constant over the entire circumference of the member 30, and the presence of the weld overlay before pressing does not cause the inner diameter dimension Di, the outer diameter dimension Do, and the thickness dimension t to differ from other portions.

The ring-shaped plate member 30 pressed by the above-mentioned pressing device 10 is the ring-shaped member 4
Since the inner and outer peripheral parts of the are free, a ring-shaped plate member formed by punching out a conventional steel plate material or a ring-shaped plate formed by bending a band material into a ring shape with its wide surface in the same plane. Inner peripheral portion 30 as compared to the member
Since the cross-sectional shape of b and the outer peripheral portion 30c are arcuate and no sharp corner is formed, no injury is caused at the corner during handling.

In the pressing device 10 described above, the amount of slide of the cam dies 16a and 16b during pressing determines the amount of rise of the lower die 13. Therefore, the amount of slide is set appropriately and the ring-shaped plate member is set. 30 inner diameter dimension Di,
The outer diameter dimension Do and the thickness dimension t can be determined.

Although not shown, if necessary, a stopper having a predetermined height may be formed so as to project on either one or both of the pressing surface 12 of the upper mold 11 and the pressing surface 14 of the lower mold 13. As a result, the lower die 13 can be reliably stopped by the increase in the predetermined height dimension of the lower die 13.

When it is required that the inner peripheral portion and the outer peripheral portion of the ring-shaped plate member, which is a press-molded product, have a rectangular cross section, as shown in FIG. 6 (a),
For example, an annular recess 140a is formed on the upper surface 140 of the lower mold 130.
And a recess 140
A chamfered portion 140b is formed at the inner peripheral corner and the outer peripheral corner of a, and the recess 140 is formed on the lower surface 120 of the upper mold 110.
It is possible to use the pressing device 100 in which the pressing surface is formed of the annular convex portion 120a that fits in a.

When the above-described pressing device 100 is used, when the lower die 130 is pressed and pressed, the annular convex portion 120a of the upper die 110 is fitted into the annular concave portion 140a of the lower die 130, and the member to be pressed is pressed. A ring-shaped member 19 (4)
By pressing not only from the upper and lower surfaces but also from the inner peripheral surface and the outer peripheral surface, a ring-shaped plate member 40 having a rectangular cross-sectional shape can be obtained as shown in FIG. 6B.

Further, in the case where the press-molded article has uneven tooth portions on one or both of the inner peripheral portion and the outer peripheral portion, such as a plate or a friction plate in an automatic transmission of an automobile. Although a pressing step for forming teeth may be added after forming the ring-shaped plate members 30 and 40, the pressing apparatus 200 shown in FIG. 7 may be used.

In the pressing device 200 of FIG. 7, a pressing surface made up of an annular convex portion 220a is formed on the lower surface 220 of the upper die 210, and the inner peripheral portion and / or the outer peripheral portion thereof has an uneven shape. Of the tooth molds 220 b and 220 c of the lower mold 230 are formed on the upper surface 240 of the lower mold 230.
An annular recess 24 into which the annular projection 220a is fitted
0a is formed, and chamfered portions 240b are formed at the corners of the inner peripheral portion and the outer peripheral portion thereof, and concave and convex tooth molds 240c and 240d are formed on either or both of the inner peripheral portion and the outer peripheral portion of the recess 240a. The shaping part is formed of.

Thus, the upper die 210 and the lower die 230
One or both of the tooth molds 220b, 220
By forming the shaping portion composed of c, 240c, and 240d, at the time of pressing, the member to be pressed 19 (ring-shaped member 4) is pressed to manufacture the ring-shaped plate member, and at the same time, the inside of the ring-shaped plate member is manufactured. As shown in FIG. 8, on one or both of the peripheral portion and the outer peripheral portion,
It is possible to manufacture a ring-shaped plate member 50 with tooth profiles 51 and / or 52.

The inclined surfaces 15a, 15b of the lower mold 13
And the inclined surfaces 17a, 17b of the cam dies 16a, 16b are preferably mirror-finished in order to reduce the frictional resistance, but in order to further reduce the frictional resistance, both inclined surfaces 15a, 17a It is desirable to interpose a lubricant such as grease between the space and 15b, 17b.

The smaller the inclination angle θ of the inclined surfaces 15a, 15b of the lower die 13 and the inclined surfaces 17a, 17b of the cam dies 16a, 16b, the smaller the pressing force of the lower die 13 against the force W applied to the cam dies 15a, 15b. The force F can be increased, but if the inclination angle θ becomes too small, the cam mold 15
Since the sliding amount of a and 15b becomes large and the size of the pressing device becomes large, it is desirable to make it 5 degrees or more.
On the other hand, if the tilt angle θ becomes too large, the cam mold 15
The ratio (F / W) of the pressing force F of the lower mold 13 to the force W applied to a, 15b becomes small, and the inclined surfaces 15a, 1
Since the frictional resistances of 5b, 17a, and 17b also increase, the inclination angle θ may be appropriately determined within a range smaller than 45 degrees.

In the pressing method of the present invention, the steel wire rod 1 as a raw material is preferably a low carbon steel of S10C or less. The reason is that both ends 2a, 2a of the ring wire 2 are
When the ring-shaped member 4 continuous in the circumferential direction by the welded portion 3 is welded, the hardness of the welded portion increases in carbon steel of S10C or more, and a crack occurs in this welded portion during pressing. This is because there is a possibility.

Even when carbon steel having a high carbon content of S10C or higher is used as the steel wire rod 1, by adding a step of annealing the welded portion 3 after the welding step, the welded portion 3 Can be annealed and softened, and a predetermined ring-shaped plate can be formed without cracking during pressing.

All of the above-mentioned pressing devices 10, 100, 200 are vertical type pressing devices in which an upper die and a lower die are arranged one above the other, but the present invention can also have a horizontal structure. FIG. 9 is a schematic cross-sectional view of a press device 300 according to an embodiment of the horizontal structure. In FIG. 9, reference numeral 310 denotes a first press die, which has a press surface 320 on one surface thereof. A second press die 330 has a press surface 3 on one surface.
40, and the inclined surface 350a having a concave center on the other surface,
It is equipped with 350b. Reference numerals 360a and 360b are intermediate cam types, and one surface has an inclined surface 350 of the press die 330.
It has inclined surfaces 370a and 370b corresponding to a and 350b, and has inclined surfaces 380a and 380b on the other surface. 390 is a cam type, and the intermediate cam types 360a, 36
0b sloped surfaces 380a, 380b corresponding sloped surface 40
0a and 400b. In addition, 410 is the first,
The second press molds 310 and 330, the intermediate cam mold 360a,
It is a frame type that surrounds 360b.

In the above press device 300, the press surface 320 of the first press die 310 and the second press die 3
Between the pressing surface 340 of 30 and the pressed member 19
Stand (4), that is, press member 19 (4)
Is placed with the winding axis direction of the
Is pressed in the direction of the arrow, the inclined surface 4 of this cam die 390 is
00a, 400b, the intermediate cam mold 360a,
The force that 360b moves to the left and right in FIG. 9 acts, but as a result of the force being blocked by the frame die 410,
The second press die 330 moves toward the first press die 310 side, whereby the press surface 320 of the first press die 310 and the press surface 3 of the second press die 330.
The member to be pressed 19 (4) is pressed by 40 and. Also in this case, the pressing force F by the second pressing die 330 is increased with respect to the force W applied to the cam die 390.

[0057]

EXAMPLES Next, examples of the present invention will be described. A steel wire rod 1 made of a low carbon steel S10C having a circular cross-section and a diameter dimension d of φ6.5 mm is wound into a ring shape by one turn using a ring wire rod manufacturing apparatus 20 shown in FIGS. 3 (a) and 3 (b). After turning, it is cut by the cutter 27 and the inner diameter is φ1.
A ring wire 2 having a diameter of 10 mm and an outer diameter of 150 mm is formed, and both ends 2a, 2a of the ring wire 2 are held by welding electrodes, and a current of 6,500 A is applied for 0.3 seconds for welding to weld the welded portion. 3 produced a ring-shaped member 4 continuous in the circumferential direction.

This ring-shaped member 4 (pressed member 19)
1 having the structure of FIG. 1 and including an upper die 11 and a lower die 13 made of die steel SKD11 and a pair of cam dies 16a and 16b, the inclined surfaces 15a and 15b of the lower die 13 and the cam dies 16a and 16b. Using the press device 10 in which the inclination angle θ of the inclined surfaces 17a and 17b is 9 degrees, the cam dies 16a and 16b are
When a pressing force of 150 t was applied to and pressed,
As shown in (a) and (b), the inner diameter Di is φ120 m.
m, outer diameter dimension Do is φ150 mm, thickness dimension t is 2 mm
The ring-shaped plate member 30 was obtained.

The ring-shaped member 4 (member to be pressed 19) described above is pressed by a conventional pressing device to obtain the structure shown in FIG.
As shown in (a) and (b), the inner diameter Di is φ120 m.
m, outer diameter dimension Do is φ150 mm, thickness dimension t is 2 mm
1,500 to obtain the ring-shaped plate member 30 of
t press equipment was required.

[0060]

As described above, the pressing device of the present invention comprises the first pressing die having the pressing surface on one surface,
A second press die having one surface formed as an inclined surface and the other surface having a press surface facing the press surface of the first press die; and a second press die arranged on one side of the second press die. A cam die whose surface on the press die side is formed into an inclined surface that matches the inclined surface of the second press die, and the first press die,
Since the second press die and the frame die surrounding the cam die are provided, the pressing force (F) obtained by the lower die with respect to the force (W) applied to the cam die is several to
It is possible to obtain a press-formed product having a predetermined shape and size by using a compact and inexpensive press device that can increase the size ten times.

Further, the pressing method of the present invention comprises a first press die having a press surface on one surface, and a first press die having one surface formed as an inclined surface and the other surface having the press surface of the first press die. A member to be pressed is arranged between pressing surfaces of a second pressing die having opposing pressing surfaces, and is formed on one side of the second pressing die with an inclined surface that matches the inclined surface of the second pressing die. By slidingly inserting the formed cam die, the member to be pressed can be pressed with a pressing force (F) larger than the force (W) applied to the cam die.

[Brief description of drawings]

FIG. 1A is a vertical cross-sectional view of a press device according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line AA of the press device of FIG.

2A and 2B illustrate a method for manufacturing a ring-shaped member that is a member to be pressed according to the present invention. FIG. 2A is a plan view of a metal wire rod, and FIG. 2B is a ring formed by winding and cutting the metal wire rod. A plan view of the wire rod, (c) a plan view of a ring-shaped member obtained by welding both ends of the ring wire rod of (b), (d) (c)
FIG. 8 is a vertical cross-sectional view of the ring-shaped member of FIG.

FIG. 3A is a schematic front view of a ring wire manufacturing device;
(B) is a schematic side view of the ring wire manufacturing apparatus of (a).

FIG. 4A is an enlarged longitudinal sectional view of an essential part showing a state before pressing of a member to be pressed by the pressing apparatus of the present invention, and FIG. 4B is a state after pressing of a member to be pressed by the pressing apparatus of the present invention. FIG. 4 is an enlarged vertical sectional view showing a main part shown.

5A is an enlarged plan view of a ring-shaped plate member which is a press-formed product by the press device of the present invention, and FIG. 5B is a vertical cross-sectional view of the ring-shaped plate member of FIG. It is a figure.

6A is an enlarged longitudinal sectional view of an essential part showing a state of a member to be pressed before pressing in a pressing device according to another embodiment of the present invention, and FIG. 6B is a drawing after pressing in the pressing device of FIG. FIG. 3 is an enlarged vertical cross-sectional view of essential parts showing the state of the press-formed product.

FIG. 7 is an enlarged vertical sectional view of an essential part of a pressing device according to still another embodiment of the present invention.

8 is a schematic enlarged plan view of a ring-shaped plate member which is a press-formed product by the press device of FIG.

FIG. 9 is a schematic cross-sectional view of a pressing device according to another embodiment of the present invention.

[Explanation of symbols]

1 Metal wire rod (steel wire rod) 2 Ring wire rod 3 Welded portion 4 Ring-shaped member (pressed member) 10, 100, 200, 300 Press device 11, 110, 210 1st press die (upper die) 12, 120a, 220a , 320 Press surface 13, 130, 230 Second press mold (lower mold) 14, 140a, 240a, 340 Press surface 15a, 15b, 17a, 17b, 350a, 350
b, 370a, 370b, 380a, 380b, 400
a, 400b Inclined surfaces 16a, 16b, 390 Cam type 18,410 Frame type 19 Pressed member (ring-shaped member) 20 Ring wire manufacturing device 21 Spool 22 Rotary table 23 Feed roller 24 Guide 25 Pressing roller 26 Core metal 27 Cutter 30 , 40, 50 Press-formed product (ring-shaped plate member) 30a Welded portion 51, 52 Tooth profile 220b, 220c, 240c, 240d Shaping part (tooth model) 360a, 360b Intermediate cam type

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) B21K 1/32 B21K 1/32 Z F term (reference) 4E070 AB10 AC03 4E087 BA02 BA17 EA11 HA82 4E090 AA10 AB00 HA01

Claims (8)

[Claims] 1. A first press die having a press surface on one surface, and a press surface having one surface formed as an inclined surface and the other surface having a press surface facing the press surface of the first press die. A second press die; a cam die disposed on one side of the second press die and having a surface on the second press die side formed into an inclined surface that matches an inclined surface of the second press die; A press device comprising: a first press die, a second press die, and a frame die surrounding the cam die. 2. The press device according to claim 1, wherein a lubricant is interposed between the inclined surfaces of the second press die and the cam die. 3. The first press die or the second press die, or both of them, has a shaping portion for shaping a member to be pressed, according to claim 1 or 2. Press machine. 4. A first press die having a press surface on one surface, and a first press die having one surface formed as an inclined surface and the other surface having a press surface opposite to the press surface of the first press die. Place the member to be pressed between the pressing surfaces of the second press die and
A cam die having an inclined surface that matches the inclined surface of the second press die is slidably inserted into one side of the second press die to press the member to be pressed with a pressing force larger than the pressing force of the cam die. A pressing method characterized by pressing with force. 5. The member to be pressed is a ring wire rod formed by molding a metal wire having a circular cross-section into a ring shape, and the press-molded product is a ring-shaped plate member. How to press. 6. The member to be pressed is a ring-shaped member obtained by welding both ends of a ring wire formed by bending a steel wire having a circular cross-section into a ring shape.
The pressing method described in. 7. A shaping part for shaping a member to be pressed is provided on one or both press surfaces of the first press die and the second press die, and at least a part of the press-formed product. The pressing method according to claim 4, wherein shaping is performed by the shaping unit. 8. The shaping section is formed of an uneven tooth profile, and the uneven tooth section is formed on either or both of an inner peripheral portion and an outer peripheral portion of the ring-shaped plate member. The pressing method according to claim 7.