JP7487592B2 - Continuous corrugated material cutting device - Google Patents

Description

The present invention relates to a cutting device for continuous corrugated bodies.

For example, corrugated fins used in radiators and condensers that make up heat exchangers are manufactured by cutting a continuous corrugated body into a set number of ridges using a cutting device.

JP 2019-202394 A

As a configuration of such a cutting device for continuous wavy bodies, a cutting position through which the continuous wavy body passes is formed between a first rotating body and a second rotating body, and a first blade portion and a second blade portion provided on each of the rotating bodies mesh with each other at the cutting position to cut the continuous wavy body fed by the first rotating body.

A third rotor is disposed on the inner periphery of the first rotor, eccentric to the second rotor, with the first rotor constituting the outer gear and the third rotor constituting the inner gear. A plurality of first blade portions are fixed to the third rotor and oriented in the radial direction, and are adapted to protrude from the first rotor and contact the continuous wavy body when the first blade portions are positioned at the cutting position as the third rotor rotates. Meanwhile, a plurality of second blade portions are provided on the second rotor and oriented in the radial direction, and are adapted to protrude from the second rotor and oriented in the radial direction when the second rotor is positioned at the cutting position as the second rotor rotates. As a result, the first blade portions and the second blade portions mesh with each other, cutting the continuous wavy body at the cutting position.

With this configuration, the first and second rotating bodies rotate synchronously, and the first and second blades mesh in sequence at the cutting position to cut the continuous wavy body, so that the continuous wavy body can be cut continuously every predetermined number of peaks.

However, in the above configuration, the number of first blade portions must be set to be less than the number of second blade portions; for example, six first blade portions are provided on the third rotating body, and eight second blade portions are provided on the second rotating body. In this configuration, when the second rotating body rotates once, the first rotating body advances one and one-third of a rotation corresponding to the eight first blade portions. For this reason, since the combination of the first blade portions and the second blade portions is unspecified, for example, when the cutting sharpness becomes dull, it becomes difficult to identify the first blade portion and the second blade portion that have become dull, making maintenance extremely difficult.

In Patent Document 1, the number of first blades and second blades is limited to one each, making it easier to manage the blades. In other words, one first blade is provided on the third rotating body, and one second blade is provided on the second rotating body, and the second blade protrudes from the second rotating body when the first blade is positioned at the cutting position, thereby cutting the continuous wavy body continuously at a predetermined number of peaks.

According to this configuration, since only one first blade portion and one second blade portion are provided, management of the blade portions is easier than in a configuration in which a combination of multiple blade portions is used to cut the continuous corrugated body.
However, with this configuration, even though the management of the blade portion is made easier, the continuous corrugated material can only be cut at intervals of a predetermined number of crests, and therefore there is a problem in that the number of crests to be cut cannot be changed.

The present invention was made in consideration of the above circumstances, and its purpose is to provide a cutting device for continuous wavy bodies that is configured to cut the continuous wavy body with a single cutting section and that is capable of changing the number of crests that are cut into the continuous wavy body.

According to the invention of claim 1, under the control of the control unit (12), the first rotating body (3) sends the continuous corrugated body (2) supplied from the previous process to the subsequent process as it rotates. The second rotating body (4) forms a cutting position between the first rotating body and the third rotating body, through which the continuous corrugated body passes. The third rotating body (5), which is provided so as to be connectable to the inner periphery of the first rotating body within a predetermined angle range in one rotation, sets a constant speed range connected to the inner periphery of the first rotating body including the cutting position, and an acceleration/deceleration range in which the connection is released. One cutting unit (7, 8) provided on the second rotating body and the third rotating body cuts the continuous corrugated body located at the cutting position.

Here, the control unit rotates the first and third rotating bodies synchronously at a constant speed when the cutting unit (7, 8) is located in the constant speed range, rotates the third rotating body in a manner that allows acceleration and deceleration relative to the first rotating body when the cutting unit is located in the acceleration/deceleration range, and drives the cutting unit when the continuous wavy body has passed the cutting position a predetermined number of times. When the number of peaks for cutting the continuous wavy body is set, the control unit obtains a linear relationship that indicates the relationship between the amount of rotation of the first rotating body and the amount of rotation of the third rotating body that corresponds to the number of peaks, and linearly interpolates the linear relationship that indicates the acceleration/deceleration range by applying a linear relationship that indicates the constant speed range to the linear relationship. This allows the position of the cutting unit relative to the first rotating body to be changed, and therefore the number of peaks for cutting the continuous wavy body to be changed.

FIG. 1 is a diagram showing an overall configuration of a cutting device according to an embodiment; FIG. 3 is a schematic diagram showing a third rotating body; A diagram showing speed changes in the acceleration/deceleration range Flowchart showing the operation of the control device Diagram showing the linear relationship between the outer gear shaft position and the cutter shaft position A diagram showing the correspondence relationship between the outer gear shaft position and the cutter shaft position when the linear relationship showing the acceleration/deceleration range is linearly interpolated. FIG. 1 is a diagram showing the relationship between the outer gear shaft position and the cutter shaft position to explain the points of the cutting table. Diagram showing cutting table Diagram showing start and end points of a constant speed range FIG. 13 is a diagram showing the correspondence relationship between the outer gear shaft position and the cutter shaft position when a linear relationship showing a constant speed range is S-shaped interpolated.

Hereinafter, an embodiment will be described with reference to the drawings.
The cutting device 1 shown in Fig. 1 is a device for cutting a continuous corrugated body 2 into a predetermined number of ridges. The continuous corrugated body 2 may be, for example, a corrugated fin used in a vehicle radiator. The cutting device 1 is composed of a first rotating body 3, a second rotating body 4, a third rotating body 5, a cam 6, a lower blade 7, an upper blade 8, a first servo motor 9, a second servo motor 10, a cam servo motor 11, and a control device 12. The lower blade 7 corresponds to the cutting section and the first blade section, the upper blade 8 corresponds to the cutting section and the second blade section, and the control device 12 corresponds to the control section.

The first rotating body 3 and the second rotating body 4 are arranged so that their outer circumferential surfaces face each other, and a cutting position through which the continuous wavy body 2 passes is formed between them, as described below. The first rotating body 3 sends the continuous wavy body 2 supplied from the previous process to the subsequent process as it rotates. In other words, teeth 13 corresponding to the shape of the continuous wavy body 2 are intermittently formed on the outer circumferential surface of the first rotating body 3, and the continuous wavy body 2 is sent from the previous process to the subsequent process as the first rotating body 3 rotates with the continuous wavy body 2 meshing with the teeth 13.

Each toothed portion 13 is composed of four teeth 13a. Between adjacent toothed portions 13, one tooth 13a is missing, and a window portion 14 that communicates with the inner circumference of the first rotating body 3 is formed in the missing portion. In this embodiment, the toothed portion 13 has nine teeth, and the number of teeth 13a that make up the toothed portion 13 is four. Therefore, when the first rotating body 3 rotates once, the continuous wavy body 2 is fed by 45 teeth, that is, 45 crests of the continuous wavy body 2.

The third rotor 5 is disposed on the inner periphery of the first rotor 3. The axis of the third rotor 5 is disposed eccentrically toward the second rotor 4 with respect to the axis of the first rotor 3. The first rotor 3 is configured as an outer gear, and the third rotor 5 is configured as an inner gear. Internal teeth (not shown) are formed on the inner periphery of the first rotor 3, and external teeth (not shown) are formed on the third rotor 5.

In this embodiment, the external teeth of the third rotor 5 are only partially formed, and the external teeth mesh with the internal teeth of the first rotor 3 within a predetermined angle range per rotation. In other words, the third rotor 5 is provided with three external teeth, and the three external teeth mesh with the internal teeth of the first rotor. The lower blade 7 is oriented in the radial direction and is integrally provided on the third rotor 5 corresponding to the central external tooth of the three external teeth, and rotates integrally with the third rotor 5 as the third rotor 5 rotates. Hereinafter, the angle range in which the external teeth of the third rotor 5 mesh with and connect to the internal teeth of the first rotor 3 is referred to as the constant speed range, and the angle range in which the connection is released is referred to as the acceleration/deceleration range.

As shown in FIG. 2, the constant speed range is indicated by diagonal lines. In other words, when the lower blade 7 is positioned at the start of the constant speed range, the first rotor 3 and the third rotor 5 start to mesh, and the lower blade 7 starts to enter the window 14 of the first rotor 3 at the same time. Next, when the lower blade 7 is positioned at the cutting position, which is the center position of the constant speed range, the meshing between the first rotor 3 and the third rotor 5 becomes maximum, and the lower blade 7 protrudes from the window 14 of the first rotor 3 to the maximum at the same time. Then, when the lower blade 7 is positioned at the end of the constant speed range, the meshing between the first rotor 3 and the third rotor 5 is released, and the lower blade 7 escapes from the window 14 of the first rotor 3 at the same time.

With the above configuration, as the third rotor 5 rotates, the lower blade 7 moves linearly relative to the radial direction of the first rotor 3, and when it reaches the cutting position, which is the center position of the constant speed range, the lower blade 7 protrudes to its maximum from the third rotor 5 and comes into contact with the continuous wavy body 2.

On the other hand, as shown in FIG. 1, the second rotor 4 is provided with one upper blade 8. This upper blade 8 is provided so as to be linearly movable in the radial direction of the second rotor 4, and is biased upward in the figure by an elastic member (not shown). A cam follower 15 is provided at the base end of the upper blade 8. The upper blade 8 and the cam follower 15 are provided integrally with the second rotor 4, and rotate integrally with the rotation of the second rotor 4.

A cam 6 is disposed on the inner periphery of the second rotor 4. A ridge 6a is formed on the cam 6, and as the cam 6 rotates once, the ridge 6a presses against the cam follower 15, causing the upper blade 8 to be elastically pressed downward in the figure and protrude from the second rotor 4.

The first rotating body 3 is rotated by a first servo motor 9, the third rotating body 5 is rotated by a second servo motor 10, and the cam 6 is rotated by a cam servo motor 11. Each of the servo motors 9 to 11 is controlled by a control device 12.

The second rotating body 4 is connected to the third rotating body 5 by a gear (not shown) and is configured to rotate in synchronization with the rotation of the third rotating body 5. In other words, when the third rotating body 5 rotates once, the second rotating body 4 rotates once in synchronization with it, so that the lower blade 7 provided on the third rotating body 5 and the upper blade 8 provided on the second rotating body 4 face each other at the cutting position.

A detailed description of the basic configuration is omitted here because it is described in the above-mentioned Patent Document 1. Hereinafter, the shaft of the first rotating body 3 is referred to as the outer gear shaft, and the shaft of the third rotating body 5 is referred to as the cutter shaft.
First, as a basic control, the control of rotating the outer gear shaft and the cutter shaft at a constant speed will be described. The control device 12 rotates the outer gear shaft and the cutter shaft at a constant speed by driving the first servo motor 9 and the second servo motor 10. At this time, the second rotating body 4 rotates synchronously with the rotation of the cutter shaft. Then, when a predetermined number of peaks of the continuous corrugated body 2 pass the cutting position due to the rotation of the outer gear shaft, the cam servo motor 11 is driven. As a result, the lower blade 7 and the upper blade 8 mesh at the cutting position, so that the continuous corrugated body 2 is cut by a predetermined number of peaks. By such control, the continuous corrugated body 2 can be continuously cut every predetermined number of peaks.

However, when the outer gear shaft and the cutter shaft are set to rotate at a constant speed, the continuous wavy body 2 is cut at a predetermined multiple of the number of peaks sent during one rotation of the outer gear shaft. Therefore, with this type of constant speed control, the number of peaks that can be cut on the continuous wavy body 2 is fixed, and the number of peaks to be cut cannot be changed.

Therefore, in this embodiment, the number of peaks cut in the continuous wavy body 2 can be changed as follows. That is, in this embodiment, only a portion of the external teeth are formed so that the cutter shaft functions as an inner gear, so that the cutter speed is controlled to be constant in a constant speed range in which the cutter shaft meshes with the outer gear shaft as shown in FIG. 3, while the cutter shaft is accelerated or decelerated in an acceleration/deceleration range in which the cutter shaft is released from meshing with the outer gear shaft. This makes it possible to change the number of peaks cut in the continuous wavy body 2.

The control of the servo motors 9 to 11 by the control device 12 will now be described.
4, when the control device 12 starts operation, it judges whether it is timing for pattern change (S1). If it is timing for pattern change (S1: YES), it judges whether the number of peaks has been changed (S2). If the number of peaks has been changed, it is judged that the number of peaks has been changed (S2: YES) and creates a cutting table (S3).

The cutting table is created as follows. When the cutting position is set to the initial position and the cutter shaft is rotated n times as shown in Figure 5, i.e., the cutter shaft is rotated by n*45 teeth, if it is set to cut when the continuous wavy body 2 has been fed m threads by the rotation of the outer gear shaft, when the cutter shaft rotates once, i.e., by 45 teeth, it is necessary to rotate the outer gear shaft to feed the continuous wavy body 2 by m*1/n threads.

However, as shown in Figure 6, there is a constant speed range centered on the cutting position, and the speed of the cutter shaft is fixed within this constant speed range, so the constant speed range is applied. For example, if the slope indicating the speed within the constant speed range is shown as a/b as shown in Figure 6, a linear relationship with a slope of a/b corresponding to the constant speed range is applied.

Next, as shown in FIG. 7, a cutting table is created which indicates the relationship between the outer gear shaft position and the cutter shaft position corresponding to points P0 to Pz which correspond to the start position and end position of each constant speed range.
In this manner, a cutting table can be created as shown in Fig. 8. When cutting the continuous corrugated body 2 into m peaks as shown in Fig. 8, one rotation of the outer gear shaft corresponds to 45 teeth, so that point Pz corresponding to n rotations of the cutter shaft can be expressed as X = m, Y = n * 45.

Next, the control device 12 judges whether the speed is within a constant range (S4), and if it is within the constant speed range (S4: YES), it directly obtains the cutter position from the cutting table created as described above (S5). That is, it obtains the positions of the outer gear shaft and the cutter shaft corresponding to each point shown in the cutting table as shown in FIG. 9, and commands the first servo motor 9 and the second servo motor 10 to move to the next point.

8, the outer gear shaft and the cutter shaft are driven at a constant speed to move from position P0 (X=0, Y=0) to position X, Y corresponding to P1. As a result, the outer gear shaft and the cutter shaft rotate at a constant speed from the cutting position, and the continuous corrugated body 2 is fed in accordance with the rotation of the outer gear shaft, and at the same time, the lower blade 7 retracts from the position where it protrudes most from the first rotor 3.
By the above operation, the outer gear shaft and the cutter shaft rotate at a constant speed from the P0 position, X=0, Y=0, to the X, Y position corresponding to P1.

When the outer gear shaft and the cutter shaft are located at the X position and the Y position corresponding to the point P1, they are in the acceleration/deceleration range (S4: NO), so the cutter position is calculated based on the cutting table in combination with S-shaped interpolation (S7). In other words, as shown in Fig. 10, a sudden speed change is mitigated by S-shaped interpolation of the linear relationship indicating a constant speed range.
Then, the control device 12 commands each of the servo motors 9 to 11 to follow the S-shaped interpolated curve (S6).

The control device 12 drives the cam servo motor 11 when the lower blade 7 reaches the cutting position. This causes the upper blade 8 to protrude from the second rotor 4 and engage with the lower blade 7, cutting the continuous wavy body 2 at the cutting position.

According to this embodiment, the following effects can be obtained.
When the number of peaks to cut the continuous wavy body is set, the control device 12 calculates a linear relationship indicating a certain speed range in the linear relationship indicating the rotation amount of the outer gear shaft and the rotation amount of the cutter shaft corresponding to the number of peaks, and drives each servo motor 9 to 11 to linearly interpolate the linear relationship indicating the acceleration/deceleration range by applying this linear relationship during operation, thereby making it possible to change the number of peaks to cut the continuous wavy body 2.
The control device 12 performs S-shaped interpolation on the linear relationship indicating a constant speed range so as to mitigate sudden speed changes, thereby enabling the outer gear shaft and the cutter shaft to rotate smoothly.

The lower blade 7 on the cutter shaft and the upper blade 8 on the second rotor 4 are each protruded radially at the cutting position to cut the continuous corrugated body 2, so that the lower blade 7 and the upper blade 8 form a single cutting section.

The cutter shaft is eccentrically positioned toward the second rotating body 4 with respect to the outer gear shaft, and the lower blade 7 protrudes to its maximum from the outer gear when it is positioned at the cutting position, so that it comes into contact with the continuous wavy body 2. This makes it easy to implement a configuration in which the lower blade 7 protrudes from the outer gear.

Other Embodiments
The second rotating body 4 may be provided rotatably independent of the cutter shaft, and the second rotating body 4 may be rotated independently by a servo motor.
Instead of S-shaped interpolating the linear relationship indicating the constant speed range, the linear relationship indicating the acceleration/deceleration range may be S-shaped interpolated, or in addition to the linear relationship indicating the constant speed range, the linear relationship indicating the acceleration/deceleration range may be S-shaped interpolated.

Although the present disclosure has been described with reference to an embodiment, it is understood that the present disclosure is not limited to the embodiment or structure. The present disclosure also encompasses various modifications and modifications within the scope of equivalents. In addition, various combinations and forms, as well as other combinations and forms including only one element, more than one element, or less than one element, are also within the scope and spirit of the present disclosure.

In the drawing, 1 is a cutting device, 2 is a continuous wave-shaped body, 3 is a first rotating body, 4 is a second rotating body, 5 is a third rotating body, 7 is a lower blade (cutting portion, first blade portion), 8 is an upper blade (cutting portion, second blade portion), and 12 is a control device (control unit).

Claims (4)

a first rotating body (3) that rotates to send the continuous corrugated body (2) supplied from a previous process to a subsequent process;
a second rotating body (4) that forms a cutting position through which the continuous corrugated body passes between the first rotating body and the second rotating body;
a third rotating body (5) that is provided so as to be connectable to the inner periphery side of the first rotating body within a predetermined angle range in one rotation, and that sets a constant speed range in which the third rotating body is connected to the inner periphery side of the first rotating body including the disconnection position and an acceleration/deceleration range in which the connection is released;
a cutting portion (7, 8) provided on the second rotating body and the third rotating body, which cuts the continuous corrugated body located at the cutting position;
a control unit (12) that rotates the first rotating body and the third rotating body at a constant speed in synchronization with each other when the cutting unit is located in the constant speed range, rotates the third rotating body so as to be capable of accelerating and decelerating relative to the first rotating body when the cutting unit is located in the acceleration/deceleration range, and cuts the continuous wavy body by driving the cutting unit when the continuous wavy body has passed the cutting position a predetermined number of times;
Equipped with
When the number of peaks to cut the continuous wavy body is set, the control unit calculates a linear relationship indicating the relationship between the amount of rotation of the first rotating body and the amount of rotation of the third rotating body corresponding to the number of peaks, and linearly interpolates the linear relationship indicating the acceleration/deceleration range by applying a linear relationship indicating the constant speed range to the linear relationship . 2. The device for cutting a continuous corrugated material according to claim 1, wherein the control unit performs S-shaped interpolation on the linear relationship indicating the constant speed range so as to reduce abrupt speed changes. The cutting portion is
a first blade portion (7) provided on the third rotating body so as to be oriented in a radial direction and protruding from the first rotating body in the radial direction when the third rotating body is positioned at the cutting position and contacting the continuous corrugated body;
a second blade portion (8) provided on the second rotating body in a radial direction and protruding from the second rotating body in a radial direction at a timing when the second rotating body is positioned at the cutting position and meshing with the first blade portion to cut the continuous corrugated body;
3. The cutting device for a continuous corrugated material according to claim 1 or 2 , comprising : the third rotor has an axis eccentric to the second rotor with respect to the axis of the first rotor,
The device for cutting a continuous corrugated body according to claim 3 , wherein the first blade portion contacts the continuous corrugated body by protruding maximally from the first rotating body when the first blade portion is positioned at the cutting position .

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