JP2002192256A - Sheet punching device and sheet punching method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet punching device and a sheet punching method capable of processing at high speed, preventing occurrence of miss feed in the halfway of feeding and reducing costs by downsizing the equipment. SOLUTION: This sheet punching device is provided with a sheet feeding part 10 which feeds a sheet material 30 to either one direction, a male cutter 14 which moves on a rotational orbit and performs a punching process of the sheet material 30, a rotation part 16 which rotates the male cutter 14 in the either one direction along the rotational orbit, and a crank part 26 which forces the male cutter 14 to reciprocate and move along a feeding direction of the sheet material 30. The sheet material 30 is continuously punched by rotating the male cutter 14 while feeding the sheet material 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material punching apparatus and method for punching a part of a thin sheet material to form a desired shape.

[0002]

2. Description of the Related Art Conventionally, a method of punching a part of a sheet material (thin plate material) and forming it into a desired shape has been widely used as in the case of manufacturing a stator core of a rotating electric machine. To do this, a sheet material punching device is used.

FIG. 4 is a view showing a conventional sheet material punching apparatus. As shown in FIG. 4, in the conventional sheet material punching apparatus, a sheet material 102 is unwound from an uncoiler 100 wound in a cylindrical shape, and is sent out by a feeder 104. The sheet material 102 sent out from the feeder 104 is sent to a mold 108 installed in a reciprocating press device 106 that linearly moves up and down. The sheet material 102 sent to the mold 108 is simultaneously punched at a plurality of locations.

FIG. 5 is a diagram showing the shape of the sheet material 102 after punching by the press device 106. For example, a sheet material 102 constituting a stator core of a rotating electric machine is shown. In the example shown in FIG.
A shape corresponding to each slot is formed by punching.

After one punching operation is completed, in order to perform the next punching operation, a plurality of punching shapes (five slots in the example shown in FIG. 5) that have been simultaneously punched out are formed. Feeder 104 by the corresponding sheet material feed amount
With this, the sheet material 102 is sent. By repeatedly performing the above-described punching process and the feeding process of the sheet material 102, a punched sheet having a desired shape can be continuously manufactured.

[0006]

However, the above-mentioned conventional sheet material punching apparatus has a problem that the operating speed of the press device 106 for performing the linear motion is limited, and it is difficult to increase the processing speed. In addition, to increase the processing speed, it is necessary to set a large amount of sheet material at the same time. There is a problem that a misfeed occurs in which the sheet material is bent. Further, in the above-mentioned sheet material punching apparatus, since the reciprocating type press apparatus 106 performing a linear motion is used, there is a problem that the equipment becomes large and the manufacturing cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to speed up the processing, to prevent the occurrence of misfeeding during feeding, and to provide equipment. It is an object of the present invention to provide a sheet material punching apparatus and method capable of reducing the cost by reducing the size of a sheet.

[0008]

In order to solve the above-mentioned problems, a sheet material punching apparatus according to the present invention comprises a sheet material feeding section for feeding a sheet material in one direction, and a sheet material feeding section for moving the sheet material on a rotating orbit. The cutter unit includes a cutter unit that performs a punching process, a rotating unit that rotates the cutter unit in one direction along a rotation trajectory, and a crank unit that reciprocates the cutter unit along a sheet material feeding direction. In the sheet material punching method of the present invention, the sheet material is continuously punched by feeding the sheet material in one direction and rotating the cutter part whose rotation track intersects the sheet material in one direction. . By rotating the cutter unit while feeding the sheet material, it is possible to continuously punch the sheet material, and it is possible to perform high-speed punching. Further, since the sheet material is continuously fed, it can be fed in a stable state, and occurrence of misfeeding during feeding can be prevented. Furthermore, because the cutter part only rotates in one direction,
Equipment can be downsized compared to the case of using a conventional reciprocating press machine that performs linear motion.
As a result, costs can be reduced.

At the timing when the feeding speed of the sheet material by the above-described sheet feeding portion and the moving speed of the cutter portion along the feeding direction by the crank portion become substantially equal,
It is desirable to perform a punching process using a cutter unit. By performing the punching process when the relative movement speeds of the sheet material and the cutter portion substantially coincide with each other, the sheet material can be accurately punched in the vertical direction, and the positioning of the punching position becomes easy.

It is desirable that a plurality of the above-described cutter units are provided on the rotating orbit. Thus, the rotation speed of the cutter unit can be reduced.

It is desirable that the sheet material is restrained immediately before the cutter unit punches out the sheet material, and that the restraint is released immediately after punching. Since it is possible to prevent the sheet material from moving when performing the punching process, it is possible to form an accurate punched shape.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a sheet material punching apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a view showing the configuration of a sheet material punching apparatus according to this embodiment. The sheet material punching device shown in FIG. 1 includes a sheet material feeding unit 10, a mess cutter 12, a male cutter 14, a rotating unit 16, a rotation supporting unit 18, a cutter rotation transmitting unit 20, a slider 22, a slider guiding unit 24, and a crank unit 26. It is composed of

The sheet feeding section 10 feeds the sheet 30 in a predetermined direction, and includes a pair of rollers 10a,
10b. The pair of rollers 10a, 1
0b, each of the rollers 10
The sandwiched sheet material 30 is fed by rotating a and b.

The mess cutter 12 forms a female die for punching the sheet material 30, and has a sheet material passage hole 12 through which the sheet material 30 penetrates.
a. When the sheet material 30 is passed through the sheet material passage hole 12a, the clearance (gap) between the sheet material passage hole 12a and the sheet material 30 is set to be small. In the mess cutter 12, a male cutter passage hole 12b through which the male cutter 14 passes in a direction perpendicular to the feeding direction of the sheet material 30 is formed.

Male cutter 14 (corresponding to the cutter section)
Is formed in a male shape for punching the sheet material 30 into an arbitrary shape, and is fixed at a predetermined position on the outer peripheral portion of the rotating unit 16 and moves on a predetermined rotation orbit. The male cutter passing hole 12b formed in the above-mentioned mescat cutter 12 is arranged in a part of this rotation track, and the sheet material 30 is punched when the male cutter 14 passes through the male cutter passing hole 12b.

The rotating section 16 is for rotating the male cutter 14 along a predetermined rotation orbit. The rotation support section 18 rotatably supports the rotation section 16. The cutter rotation transmission unit 20 drives the rotation unit 16 to rotate in one direction.

The slider 22 is provided with the mess cutter 12 described above.
And the rotation support portion 18 are fixed at a predetermined upper position, and move them in the feeding direction of the sheet material 30. The slider guide 24 is for determining the moving direction of the slider 22. In the present embodiment, two rod-shaped members are used as the slider guides 24, and these are communicated with the through holes formed in the slider 22 and parallel to the feeding direction of the sheet material 30.

The crank section 26 is for reciprocating the slider 22 by sliding the slider 22 along the slider guide section 24, and includes a crank drive motor 26a, a crank rotation support section 26b, and a crank 26c. Have been. The crank drive motor 26a generates a rotational drive force. The crank rotation supporting portion 26b is connected to and rotationally supported by the crank driving motor 26a, and transmits the rotational driving force generated by the crank driving motor 26a. The crank 26c is for converting the rotational motion into a linear reciprocating motion, and one end of the crank 26c is a crank rotary support 26b.
The other end is rotatably supported by the slider 22. As described above, since the slider guide portion 24 communicates with the through hole formed in the slider 22 and the moving direction of the slider 22 is restricted, by rotating the crank 26c, the slider 22 Reciprocates in the feed direction.

The sheet material punching device of the present embodiment has such a structure, and the operation thereof will be described below.

(Step 1) First, the sheet material feeding section 10
Performs an operation of feeding the sheet material 30 by a predetermined amount in a predetermined feeding direction. In synchronization with the feeding operation of the sheet material 30, the slider 22 moves so as to follow the sheet material 30 in the feeding direction of the sheet material 30.

(Step 2) The rotating unit 16 is rotating simultaneously with the moving operation of the slider 22, and the rotating unit 1 is rotated at the timing when the moving speed of the slider 22 reaches a predetermined speed.
The male cutter 14 fixed to the outer periphery of 4 passes through the sheet material 30 and performs punching.

FIG. 2 is a view showing the shape of the punched sheet material 30. As shown in FIG. For example, a specific example of the shape when punching the slot 30a is shown.

(Step 3) After the punching operation is completed,
The slider 22 moves in the opposite direction to prepare for the next punching operation. Thus, each time the slider 22 performs one reciprocating motion, one punching process is performed.

FIG. 3 is a diagram showing the relationship between the moving speed of the slider 22 and the feed speed of the sheet material 30. Slider 2
The speed of 2 is determined by the number of revolutions of the crank 26c and the crank 26c.
c at both ends of the slider 22 and the crank rotation support 2
6b is determined by the amount of eccentricity of each mounting position (distance between each mounting position). When the crank drive motor 26a is rotating at a constant angular speed, the moving speed Vs of the slider 22 is equal to the speed shown in FIG.
Can be represented by a sine wave as shown in FIG. Further, the sheet material 30 is fed at a constant speed Vt. In the present embodiment, the maximum value of the moving speed Vs of the slider 22 is set to be substantially equal to the feed speed Vt of the sheet material 30, and the moving speed Vs of the slider 22 is substantially equal to the feed speed Vt of the sheet material 30. At a certain timing (in the specific example shown in FIG. 3, at the time when the speed Vs exceeds the speed Vt (point A) and falls again below the speed Vt (point B)), the male cutter 14 punches the sheet material 30 through Processing is performed.

As described above, in the sheet material punching apparatus of the present embodiment, the sheet material 30 can be continuously punched by rotating the male cutter 14 while feeding the sheet material 30. It can be carried out. Further, since the sheet material 30 is continuously fed, the sheet material 30 can be fed in a stable state, and occurrence of misfeeding during feeding can be prevented. Furthermore, since the male cutter 14 only rotates in one direction, the size of the equipment can be reduced as compared with the case of using a conventional reciprocating type press device that performs a linear motion, thereby reducing the cost. Can be achieved.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the sheet material punching apparatus according to the above-described embodiment, the male cutter 1
Although only one 6 is provided, a plurality of 6 may be provided at predetermined intervals. For example, when a total of three male cutter units are provided for every 2π / 3, the rotating unit 16 is
Since the sheet material 30 is punched every three rotations, the number of rotations of the rotating unit 16 can be set slow.

In the above-described embodiment, the sheet material passage hole 12a is formed in the mess cutter portion 12 and the sheet material 30 is simply passed through the hole.
It is also possible to provide the sheet cutter 30 with a sheet holding section that presses and restrains the sheet 30 immediately before the punching process is performed after passing through the sheet 30 and releases the restraint after the punching process is completed. Good. In this case, since the sheet material 30 can be prevented from slightly moving or shifting during the punching process, the punching process can be performed at an accurate position and shape.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a sheet material punching device according to an embodiment.

FIG. 2 is a view showing the shape of a sheet material that has been punched.

FIG. 3 is a diagram illustrating a relationship between a moving speed of a slider and a feeding speed of a sheet material.

FIG. 4 is a view showing a conventional sheet material punching apparatus.

FIG. 5 is a view showing a shape of a sheet material after punching by a press device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 sheet material feeding section 12 mescat cutter 14 oscutter 16 rotating section 18 rotation support section 20 cutter rotation transmitting section 22 slider 24 slider guide section 26 crank section 30 sheet material

Claims (7)

[Claims] 1. A sheet material feeder for feeding a sheet material in one direction, a cutter unit for moving on a rotating orbit to punch the sheet material, and a cutter unit for moving the cutter unit in one direction along the rotating orbit. A sheet material punching device, comprising: a rotating unit configured to rotate; and a crank unit configured to reciprocate the cutter unit in a feeding direction of the sheet material. 2. The sheet feeding device according to claim 1, wherein a feeding speed of the sheet material by the sheet material feeding unit;
A sheet material punching device, wherein the punching process is performed by the cutter unit at a timing when a moving speed of the cutter unit in the feed direction by the crank unit becomes substantially equal. 3. The sheet material punching device according to claim 2, wherein a plurality of the cutter units are provided on an outer periphery of the rotating unit. 4. The sheet material punching device according to claim 1, wherein the cutter portion restrains the sheet material immediately before punching the sheet material, and releases the restraint immediately after punching the sheet material. apparatus. 5. The sheet according to claim 1, wherein the sheet material is fed in one direction, and the sheet material is continuously punched by rotating in one direction a cutter section whose rotation orbit intersects with the sheet material. Material punching method. 6. The sheet unit according to claim 5, wherein the cutter unit is reciprocated along the sheet material feeding direction, and the moving speed of the cutter unit becomes substantially equal to the sheet material feeding speed. A sheet material punching method characterized by punching a sheet. 7. The device according to claim 6, wherein a plurality of the cutter units are provided on the rotating orbit, and the number of the cutter units is reduced while one of the cutter units makes one rotation on the rotating orbit. A sheet material punching method, wherein the sheet material is punched a corresponding number of times.