JP7311444B2 - Spinning device and spinning method - Google Patents

Description

The present invention relates to a spinning device and a spinning method.

Automobile parts constituting automobiles include, for example, a drive plate for cranking an engine. The drive plate has a disc shape, and has meshing teeth (tooth portions) formed on its edge with which the starter pinion is meshed.
This drive plate is obtained from a base material (disk-shaped material) having a constant thickness. First, the base material is formed with a thick portion having an increased thickness on the outer peripheral portion by a molding device (see, for example, Patent Document 1). A drive plate is obtained by forming meshing teeth on the edge of the thick portion.

Japanese Patent Application Laid-Open No. 2009-241130

In addition to the molding apparatus described in Patent Document 1, there is also known an apparatus for molding a plate-like base material into a cylindrical molded product. When using this apparatus to obtain a cylindrical molded product, damage such as cracks may occur at the edges of the molded product, depending on the surface condition (surface hardness, etc.) of the base material.

SUMMARY OF THE INVENTION An object of the present invention is to provide a spinning apparatus and a spinning method capable of preventing damage such as cracks from occurring in a molded product obtained by molding a base material.

One aspect of the spinning apparatus of the present invention is a plate-shaped supporting portion that supports a base material having an outer edge hardened portion that is harder than the center side,
a first forming portion that presses the hardened outer edge portion while the base material is supported by the support portion to divide the distribution range of the hardened outer edge portion in the thickness direction of the base material;
and a second molding section that presses the base material while supporting the base material by the support section to shape the base material into a tubular shape.

Further, one aspect of the spinning method of the present invention is a supporting step of supporting a base material having a plate shape and having an outer edge hardened portion that is harder than the center side;
a first forming step of applying pressure to the hardened outer edge portion while maintaining the supporting step to divide the distribution range of the hardened outer edge portion in the thickness direction of the base material;
and a second forming step of pressing the base material while maintaining the supporting step to form the base material into a cylindrical shape.

When the molding by the first molding unit (first molding step) is omitted, the hardened outer edge portion of the base material becomes the edge of the opening of the molded article as it is. The outer edge hardened part is a hardened part and is deformed to be thinner in the second forming part (second forming step). Such damage tends to occur. As a result, the molded product may become defective with damage.

In contrast, according to the present invention, the molded product is obtained through molding (first molding step) by the first molding section. In this case, the outer hardened portion, which is easily damaged, can be removed from the edge of the opening of the molded article. As a result, damage such as cracks can be prevented from occurring in the molded product obtained by molding the base material, and a good molded product can be obtained.

It is a partial vertical cross-sectional side view which shows in order the operating state (roller separation state) of the spinning apparatus of this invention. It is a partial vertical cross-sectional side view sequentially showing the operating state (first forming state) of the spinning apparatus of the present invention. It is a partial vertical cross-sectional side view which shows in order the operating state (roller separation state) of the spinning apparatus of this invention. It is a partial vertical cross-sectional side view sequentially showing the operating state (second molding state) of the spinning apparatus of the present invention. FIG. 3 is an enlarged detailed view of the area [A] enclosed by the two-dot chain line in FIG. 2; 1 is a block diagram showing a main part of a spinning machine of the present invention; FIG. It is a figure which shows in order the process which the spinning processing method of this invention has. It is a perspective view which shows an example of the molded article which became a non-defective product. It is a perspective view which shows an example of the molded product which became a defective product.

Embodiments of the spinning apparatus and spinning method of the present invention will be described below with reference to FIGS. 1 to 9. FIG. In the following, for convenience of explanation, the three axes orthogonal to each other are set as the X-axis, the Y-axis and the Z-axis. As an example, the XY plane including the X axis and the Y axis is horizontal, and the Z axis is vertical. 1 to 5, 8 and 9 are sometimes referred to as "upper (or upper)" and lower as "lower (or lower)".

As shown in FIGS. 1 to 4, the spinning machine 1 includes a rotation support portion (support portion) 2, a molding portion 4, a first movement mechanism portion 6, and a second movement mechanism portion . The spinning apparatus 1 can shape the base material 9 and obtain a molded product 9A from the base material 9 . And 9 A of molded articles are used as a motor vehicle component, for example so that it may mention later.
Moreover, as shown in FIG. 6, the spinning processing apparatus 1 includes a controller 8 .

As shown in FIG. 7, the spinning apparatus 1 can sequentially perform the spinning process of the present invention, that is, the rotating process (supporting process), the first forming process, and the second forming process. The rotation process is performed by the rotation support part 2 . The first molding process and the second molding process are performed by the molding section 4 .

In this embodiment, the base material 9 is a plate member having a shape in plan view, that is, a circular shape when viewed from the Z-axis direction. The base material 9 has a constant thickness. A through hole 91 is formed in the central portion of the base material 9 .
Note that the shape of the base material 9 in plan view is not limited to a circle. Also, the base material 9 is made of a metal material such as aluminum or stainless steel.

As shown in FIG. 1, the base material 9 before being molded by the molding unit 4 has a hardened outer edge portion 92 and a non-hardened portion 93 having different hardnesses.
The hardened outer edge portion 92 is provided at the outer edge portion of the base material 9 . The outer edge hardened portion 92 is a portion hardened more than the center side. In this embodiment, the base material 9 is formed by performing blanking (punching) or processing with a laser beam on a strip-shaped plate member. The outer edge hardened portion 92 is formed by quenching and hardening the outer edge of the base material 9 by heat generated during blanking or laser light irradiation.

A non-hardened portion 93 is formed on the center side of the outer edge hardened portion 92 . The heat during blanking is transferred to the central side of the outer edge hardened portion 92, but the non-hardened portion 93 is a portion that has not been hardened by quenching.

The rotation support part 2 can perform a rotation step of supporting the base material 9 and rotating the base material 9 . The rotation support section 2 has a shaft member 21 and a motor 22 .
The shaft member 21 has two vertically arranged columnar portions. Of the two columnar portions, the lower portion is called "first portion (first columnar portion) 211" and the upper portion is called "second portion (second columnar portion) 212". The shaft member 21 is arranged parallel to the Z-axis direction, and can rotate about its central axis as the center of rotation (rotational axis O21).

A reduced diameter portion 213 having a reduced outer diameter is provided on the upper portion of the first portion 211 . The reduced diameter portion 213 is inserted through the through hole 91 of the base material 9 . The base material 9 is supported between the first portion 211 and the second portion 212 so that the thickness direction is parallel to the rotation axis O21. At this time, the base material 9 is concentrically supported with the shaft member 21 . As a result, the base material 9 can be rotated around the rotation axis O21 together with the shaft member 21 .

A motor 22 is connected to the shaft member 21 via, for example, a speed reducer (not shown). By operating the motor 22 , the base material 9 can be rotated around the rotation axis O<b>21 together with the shaft member 21 . In addition, in the spinning machine 1, the number of revolutions of the motor 22 can be changed by adjusting the voltage applied to the motor 22. FIG.

The first moving mechanism part 6 is a part that moves each roller 41 of the forming part 4 in the X-axis direction (horizontal direction). The first moving mechanism section 6 has a direct acting section 61 and a motor 62 .
The linear motion part 61 is a part that is connected to the roller 41 and linearly moves the roller 41 along the X-axis direction, and is composed of, for example, a linear guide, a ball screw, or the like.

The motor 62 is connected to the direct acting portion 61 . When the motor 62 operates, its power is transmitted to the rollers 41 via the direct acting portion 61 . Thereby, the roller 41 can be moved in the X-axis direction.

The second moving mechanism portion 7 is a portion that moves each roller 41 in the Z-axis direction (vertical direction). The second moving mechanism section 7 has a direct acting section 71 and a motor 72 .
The linear motion part 71 is a part that is connected to the roller 41 and linearly moves the roller 41 along the Z-axis direction, and is composed of, for example, a linear guide, a ball screw, or the like.

The motor 72 is connected to the direct acting portion 71 . When the motor 72 operates, its power is transmitted to the rollers 41 via the direct acting portion 71 . Thereby, the roller 41 can be moved in the Z-axis direction.
By appropriately combining the operation of the first moving mechanism portion 6 and the operation of the second moving mechanism portion 7, the roller 41 is brought closer to and away from the base material 9 as shown in FIGS. Alternatively, the base material 9 can be molded by the rollers 41 .

As shown in FIG. 6, the control section 8 is electrically connected to the rotation support section 2, the first moving mechanism section 6, and the second moving mechanism section 7, and can control these operations. The control unit 8 has a CPU 81 and a storage unit 82 . The CPU 81 can execute a control program stored in advance in the storage unit 82, for example. The control program includes, for example, a program for molding the base material 9 by controlling operating conditions (operation timings) of the rotation support portion 2, the first moving mechanism portion 6, and the second moving mechanism portion 7. .

The molding unit 4 is a portion that sequentially performs a first molding process and a second molding process on the base material 9 while the base material 9 is rotated by the rotation support part 2, that is, while the rotation process is maintained. be. The first forming step is a step of pressurizing the hardened outer edge portion 92 to divide the distribution range of the hardened outer edge portion 92 in the thickness direction of the base material 9, that is, in the Z-axis direction. The second forming step is a step of pressurizing the base material 9 to form the base material 9 into a tubular shape. As will be described later, the forming part 4 functions as the first forming part 4A in the first forming process, and functions as the second forming part 4B in the second forming process.

The molding unit 4 has a pair of rollers 41 that are idle rollers and a shaft member 42 that rotatably supports each roller 41 .
The pair of rollers 41 are arranged in the X-axis direction via the shaft member 21 (rotational axis O21). Accordingly, when performing the first forming process and the second forming process, force can be applied to the base material 9 from the positive side and the negative side in the X-axis direction by the rollers 41, so that each forming process can be performed quickly and quickly. can be done stably.

In this embodiment, the minor axis direction of each roller 41 is arranged parallel to the Z-axis direction. Moreover, each roller 41 is pressed against the base material 9 at the large curvature portion 411 having a large curvature in the outer peripheral portion.
The shaft member 42 supports the roller 41 rotatably around a rotation axis O42 parallel to the Z axis.

Next, the process of forming the base material 9 by the spinning device 1 will be described.
[1] First, as shown in FIG. 1 , the base material 9 is supported by the rotation support portion 2 and the base material 9 is placed between the rollers 41 . Each roller 41 is separated from the base material 9 .
Then, in this state, the rotation support part 2 is operated to rotate the base material 9 . The rotation of the base material 9 is maintained until the forming of the base material 9 is completed.

[2] Next, the first moving mechanism 6 is operated to bring the rollers 41 closer to the base material 9 as shown in FIG. Then, the large curvature portion 411 of one roller 41 is pressed against the hardened outer edge portion 92 of the base material 9 from the X-axis direction positive side, and the large curvature portion 411 of the other roller 41 is pressed against the base material 9 from the X-axis direction negative side. It is pressed against the outer hardened portion 92 . As a result, the hardened outer edge portion 92 is pressed (pressurized) toward the rotation axis O21 side (the center side of the base material 9), and is deformed while expanding to the positive side and the negative side in the Z-axis direction. At this time, each roller 41 rotates around the rotation axis O42 as the rotation force from the rotation support portion 2 is transmitted through the base material 9 .

Due to the deformation of the hardened outer edge portion 92, as shown in FIG. 5, the distribution range of the hardened outer edge portion 92 can be divided in the thickness direction of the base material 9, that is, in the Z-axis direction (first forming step). . As a result, on both sides of the hardened outer edge portion 92 in the Z-axis direction, high distribution portions 921 are formed in which the hardened outer edge portion 92 has a large distribution range. A low distribution portion 922 is formed between the high distribution portions 921 so that the distribution range of the hardened outer edge portion 92 is small.

Thus, in the first forming step, the roller 41 (forming section 4) functions as the first forming section 4A that divides the distribution range of the hardened outer edge portions 92 in the Z-axis direction.
In this embodiment, the edge portion 931 of the non-hardened portion 93 is exposed from the low distribution portion 922 after molding by the roller 41, although it depends on the degree of pressing force by the roller 41. FIG. As a result, the hardened outer edge portion 92 can be moved to both sides in the Z-axis direction as much as possible, thereby preventing cracks that may occur in the hardened outer edge portion 92, which will be described later.
Note that the high distribution portion 921 may be formed on one side in the thickness direction. Also in this case, since the edge 931 of the non-hardened portion 93 is exposed, cracks that may occur in the hardened outer edge portion 92 can be prevented.

[3] Next, the first moving mechanism portion 6 and the second moving mechanism portion 7 are appropriately actuated so that the rollers 41 are spaced apart above the base material 9 as shown in FIG.

[4] Next, the first moving mechanism part 6 and the second moving mechanism part 7 are appropriately actuated, and as shown in FIG. pressurized to perform drawing. As a result, the base material 9 is stretched thinly along the outer peripheral portion of the first portion 211 of the shaft member 21 and deformed, and is gradually formed into a cylindrical shape (second forming step).

Thus, in the second forming step, the rollers 41 (forming section 4) function as a second forming section 4B that presses the base material 9 to form the base material 9 into a tubular shape.
Then, when the second molding step is completed, a molded product 9A as shown in FIG. 8 is obtained.

Further, in the spinning apparatus 1, the common roller 41 is used as the first shaping section 4A and the second shaping section 4B. As a result, the configuration of the spinning apparatus 1 becomes simpler than, for example, when the forming section 4 has rollers for the first forming process and rollers for the second forming process.

By the way, when the first molding step is omitted, a molded product 9B as shown in FIG. 9 is obtained.
Both the molded product 9A and the molded product 9B have a plate-like bottom portion 94 and a cylindrical side wall portion 95, and an opening 96 is formed on the side opposite to the plate-like bottom portion 94. Moreover, the thickness of the side wall portion 95 is thinner than the thickness of the bottom portion 94 . The difference between the molded product 9A and the molded product 9B is that the molded product 9B has damage 97 such as cracks (cracks). Possible causes of the damage 97 are as follows.

When the first molding process is omitted and the rotation process is shifted to the second molding process, the hardened outer edge portion 92 of the base material 9 becomes the upper end edge portion 98 of the opening 96 of the molded product 9B as it is. In this case, the outer edge hardened portion 92 is a hardened portion and is deformed to be thinner in the second molding process. tend to occur. As a result, the molded product 9B may become a defective product with damage 97 .

On the other hand, the molded product 9A is obtained by moving from the rotation process to the second molding process through the first molding process. In this case, in the first molding step, the edge portion 931 of the non-hardened portion 93 is exposed from the low distribution portion 922 of the outer edge hardened portion 92 . This edge portion 931 becomes the upper end edge portion 98 of the opening portion 96 of the molded article 9A. Edge 931 is less hardened than outer edge hardening 92 . Therefore, even if the thickness of the edge portion 931 is reduced, the molded product 9A is completed before the edge portion 931 exceeds the fracture limit. As a result, it is possible to prevent damage 97 from occurring in the molded product 9A.

Although the spinning apparatus and spinning method of the present invention have been described above with reference to the illustrated embodiments, the present invention is not limited thereto. In addition, each part that constitutes the spinning machine can be replaced with an arbitrary structure that can exhibit the same function. Moreover, arbitrary components may be added.

Further, the spinning apparatus 1 is configured to perform molding while the base material 9 is rotated in the above embodiment, but is not limited to this, and for example, performs molding while the base material 9 is fixed. may be configured as follows.
Further, in the above-described embodiment, the common roller 41 is used as the first forming section 4A and the second forming section 4B, but the present invention is not limited to this. For example, different rollers may be used as the first shaping section 4A and the second shaping section 4B.

In addition, although the number of rollers 41 arranged is two in the above embodiment, it is not limited to this, and may be, for example, one or three or more.
Further, the molded product 9A may have teeth formed on the inner peripheral portion of the side wall portion 95 . In this case, the molded product 9A is used as an internal gear.

1 Spinning processing device 2 Rotation support part (support part)
21 shaft member 211 first portion (first columnar portion)
212 second part (second columnar part)
213 Reduced Diameter Part 22 Motor 4 Molding Part 41 Roller 411 Large Curvature Part 6 First Movement Mechanism Part 61 Linear Motion Part 62 Motor 7 Second Movement Mechanism Part 71 Linear Motion Part 72 Motor 8 Control Part 81 CPU
82 Memory part 9 Base material 9A Molded product 9B Molded product 91 Through hole 92 Outer hardened part 921 High distribution part 922 Low distribution part 93 Non-hardened part 931 Edge 94 Bottom 95 Side wall 96 Opening 97 Damage 98 Top edge O21 Rotation Axis O42 Rotation axis

Claims (7)

a plate-shaped supporting portion that supports a base material having an outer edge hardened portion that is harder than the center side;
a first forming portion that presses the hardened outer edge portion while the base material is supported by the support portion to divide the distribution range of the hardened outer edge portion in the thickness direction of the base material;
A spinning apparatus, comprising: a second forming section that presses the base material while supporting the base material by the support section to form the base material into a cylindrical shape. 2. The spinning apparatus according to claim 1, wherein a common roller is used for said first shaping section and said second shaping section. the support portion rotatably supports the base material around a rotation axis parallel to the thickness direction;
3. The spinning apparatus according to claim 2, wherein a pair of said rollers are arranged via said rotating shaft. The spinning processing apparatus according to any one of claims 1 to 3, wherein the first shaping portion presses and deforms the outer edge hardening portion toward the center side. The first molded portion forms high distribution portions in which the distribution range is large on both sides in the thickness direction with respect to the outer edge hardening portion, and the distribution range is small between the high distribution portions. 5. The spinning device according to claim 4, wherein the low distribution portion is formed. The base material in a state before being molded by the first molding unit has a non-hardened portion on the center side of the outer edge hardened portion,
6. The spinning apparatus according to claim 5, wherein the non-hardened portion is exposed from the low distribution portion after molding by the first molding portion. a supporting step of supporting a base material having a plate shape and having an outer edge hardened portion that is harder than the center side;
a first forming step of applying pressure to the hardened outer edge portion while maintaining the supporting step to divide the distribution range of the hardened outer edge portion in the thickness direction of the base material;
and a second forming step of pressurizing the base material while maintaining the supporting step to form the base material into a cylindrical shape.

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