JP2002263950A - Method and device for cutting long workpiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for cutting a long workpiece, allowing automatic cutting work throughout the total length of the long workpiece even if end materials are produced. SOLUTION: When the long workpiece W is cut at predetermined intervals, lengths M of the end materials produced from the long workpiece W at given stages for cutting work are calculated and portions corresponding to the lengths M of the end materials are cut at the given stages for cutting work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cutting a long material. More specifically, the present invention relates to a method for cutting a long material for cutting the long material at predetermined intervals and an improvement in a cutting device.

[0002]

2. Description of the Related Art Conventionally, when a long material is cut at predetermined intervals, a cutting device as shown in FIG. 10 has been used. As shown in FIG. 10, the cutting device S ′ includes a fixing vise 1 for fixing the saw blade 102 and the long material W ′ at the time of cutting.
03, 103, and a long material W '
To a cutting mechanism 101.

In the cutting apparatus S ', the feeding vise 104 grips the long material W' at a predetermined gripping position A, and moves at a releasing position B which is moved toward the cutting mechanism 101 by a predetermined feeding amount L '. While the operation of releasing the material W ′ is repeated, the feeding device 104 separates the long material W ′ at the release position B, and then the cutting mechanism 101 fixes the long material W ′ with the fixed vise 103, 103 and the saw blade. By repeating the operation of cutting at 102, the long material W 'is cut at predetermined intervals.

[0004] Here, the total length of the long material W 'is equal to the feed amount L.
If it is not an integral multiple of ', a scrap is generated in the long material W', but in the conventional cutting method, this scrap is generated at the rear end of the long material W '. Then, as shown in FIG.
If the gripping position A has not been reached, the feed vise 104
Therefore, it is not possible to feed the cutting portion of the end material H ′ to the cutting mechanism 101.

[0005] In view of the above, there has been a problem that the work efficiency is reduced since a worker cuts the cut portion manually so as to match the saw blade 102.

In order to eliminate the reduction in work efficiency due to the manual cutting of the scraps, terminal materials longer than a desired length are stored in a terminal material storage device, and the number of the terminal materials reaches a predetermined number. Later, it is possible to adopt a method in which the terminal materials are collectively adjusted to a desired length manually, but in that case, the terminal materials have a weight of about several tens of kilograms, so that the workers are forced to perform heavy labor. Another problem arises.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and is intended to automatically perform all cutting operations over the entire length of a long material even when scraps are generated. It is an object of the present invention to provide a method and an apparatus for cutting a long material that can be used.

[0008]

According to the present invention, there is provided a method for cutting a long material, which is a method for cutting a long material at a predetermined interval. The length of the offcuts is calculated, and a portion corresponding to the length of offcuts is cut at a predetermined stage of the cutting operation.

In the method for cutting a long material according to the present invention, the rear end of the long material is detected during the feeding operation of the long material, and after the detection of the rear end, the feeding of the long material is completed. It is preferable that the feed amount is detected and the length of the offcuts generated in the long material is calculated based on the detected feed amount.

In the method of cutting a long material according to the present invention, it is preferable that the calculated length of the scrap material is corrected on the basis of a cutting margin of the long material.

On the other hand, a cutting device of the present invention is a device for cutting a long material which cuts a long material at a predetermined interval, comprising a cutting mechanism, and a feeding mechanism for feeding the long material to the cutting mechanism. A feed amount detecting means for detecting a feed amount of the long material, a rear end detecting means for detecting a rear end of the long material, and a control operation unit, wherein the control operation unit Based on the output signals of the detecting means and the trailing end detecting means, the length of the scrap material generated in the long material is calculated, and the cutting mechanism and the feeding mechanism are controlled, whereby a predetermined stage of the cutting operation is performed. In this case, the long material is fed to the cutting mechanism by the calculated length of the end material, and cutting is performed.

In the cutting apparatus according to the present invention, after the trailing end of the long material is detected by the trailing end detecting means during the feeding operation of the long material by the control operation unit, the feeding operation is completed. Preferably, the length of the offcuts is calculated based on the feed amount detected by the feed amount detecting means.

Further, in the cutting apparatus of the present invention, it is preferable that the control calculation unit corrects the length of the offcuts calculated based on the cutting allowance of the cutting mechanism.

[0014]

Since the present invention is constructed as described above, the cutting operation of the long material can be completely automated.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments with reference to the accompanying drawings, but the present invention is not limited to only such embodiments.

First Embodiment FIG. 1 is a schematic view of a long material cutting apparatus (hereinafter simply referred to as a cutting apparatus) to which a long material cutting method according to a first embodiment of the present invention is applied. As shown in FIG. 1, the cutting device S includes a cutting mechanism 10 for cutting a long material W, and a cutting mechanism 1.
0, a feeding mechanism 20 for sequentially feeding the long material W, a feeding amount detecting means 30 for detecting a feeding amount of the long material W, and a long material W.
The main components are a rear end detecting means 40 for detecting the rear end of the printer, a control operation section 50 for controlling the cutting mechanism 10 and the feeding mechanism 20 and performing various arithmetic processing, and an input means 60 for inputting set values and the like. Become an element. Here, the input means 6
0 is, for example, a keyboard, a touch panel, or the like.

The cutting mechanism 10 includes a saw blade 11 for cutting the long material W, and a saw blade 11 provided on both sides of the saw blade 11 to cut the long material W at the time of cutting.
And fixing vise 12 for fixing the same.

The feeding mechanism 20 feeds the long material W to the cutting mechanism 10 by a predetermined predetermined feed amount. And an actuator 22 for moving the length member W in the longitudinal direction. The grip 21 is attached to guide means (not shown) so as to be slidable in the longitudinal direction of the long material W, and the actuator 22 is, for example, a hydraulic cylinder.

The feed amount detecting means 30 outputs pulse signals of a number corresponding to the amount of movement of the grip portion 21 of the feed mechanism 20 to the control arithmetic section 50, and is, for example, a linear encoder.

The rear end detecting means 40 is a photoelectric switch including a light projector 41 and a light receiver 42 for outputting an electric signal to the control operation section 50 when receiving light from the light projector 41. Here, the light emitter 41 and the light receiver 42 are formed of a long material W
It is installed so as to face each other. That is,
The light receiver 42 is installed so as to receive the light from the light emitter 41 at the moment when the rear end of the long material W passes between the light emitter 41 and the light receiver 42. Further, the rear end detecting means 40 is provided with the feeding mechanism 2 from the viewpoint of reducing an error in the arithmetic processing described later.
It is preferable that the device is installed at a position as close as possible to the cutting mechanism 10 within a range that does not interfere with the zero feed operation.

The control operation unit 50 is provided with the saw blade 1 of the cutting mechanism 10.
Control means 51 for instructing the gripper 21 and actuator 22 of the feeding mechanism 20 to perform various operations to be described later, and output signals of the light receiving unit 42 of the feeding amount detecting means 30 and the rear end detecting means 40. And an arithmetic processing means 52 for performing arithmetic processing based on.

The arithmetic processing means 52 includes a feed amount detecting means 30
Based on the output signal of the light receiver 42, the length of the end material generated in the long material W is calculated. Specifically, as shown in FIG. 2, the length of the long material W present behind the trailing end detection means 40 is reduced by the feeding mechanism 20 from a state in which the length is shorter than a preset one feeding amount L. When the long material W is fed by one feed amount L, the rear end of the long material W is detected by the rear end detecting means 40 during the feeding operation.
The arithmetic processing means 52 outputs the long material W based on the output signals of the feeding amount detecting means 30 and the light receiver 42 during the feeding operation.
This calculates the length of the offcuts generated in the above.

Next, the principle of calculating the offcut length by the arithmetic processing means 52 will be described with reference to FIG. Here, FIG. 2B shows a state in which the rear end of the long material W is detected during the feeding operation and the feeding operation ends. L ₁ indicates the distance between the saw blade 11 and the rear end of the long material W, L ₂ indicates the distance between the rear end of the long material W and the light receiver 42, and L ₃ indicates the distance between the saw blade 11 and the light receiving device 42. And the distance between the light receiver 42 and
M indicates the length of the offcuts.

The length M of the end material is represented by the following equation (1), where x is the fractional part of L ₁ / L.

M = x · L (1)

Note that L ₃ is known because it is the distance between the saw blade 11 and the light receiver 42, and L ₂ is calculated based on the output signals of the feed amount detecting means 30 and the light receiver 42. Can be. Specifically, after the light receiver 42 detects the rear end of the long material W, L ₂ is calculated from the number of pulses of the pulse signal output by the feed amount detection means 30 until the feed operation ends. can do.

Further, as is apparent from FIG.
_{Since 1} = L ₃ −L ₂ , L ₁ can also be calculated, that is, the fractional part x of L ₁ / L can be calculated. Therefore, the scrap length M is calculated from the above equation (1). be able to.

Next, an operation of cutting the long material W by the cutting device S having such a configuration will be described with reference to FIG.

(1) The one feed amount L is inputted by the input means 60.

(2) After the control means 51 causes the gripping portion 21 of the feeding mechanism 20 to grip the long material W,
2 is driven to advance the grip portion 21 toward the cutting mechanism 10 by the feed amount L.

(3) The control means 51 releases the long material W from the grip portion 21 and controls the fixed vice 1 of the cutting mechanism 10.
After the long material W is fixed to the second and the second material 12, and then the long material W is cut by the saw blade 11, the fixing of the fixing vise 12 is released. In addition, the control means 51 controls the operation of the actuator 22.
To move the gripping portion 21 back to the original position.

(4) The control means 51 includes the rear end detection means 40
The operations (2) and (3) are repeated until the end of the long material W is detected.

(5) When the trailing end detecting means 40 detects the trailing end of the long material W during the feeding of the long material W, after the feeding operation for one feed amount is completed, the arithmetic processing means 52 Calculates the end material length M generated in the long material W based on the output signals of the feed amount detecting means 30 and the light receiver 42. Control means 5
1 causes the cutting mechanism 10 and the feeding mechanism 20 to perform the operation (3).

(6) The control means 51 causes the gripping portion 21 to grip the long material W, and then drives the actuator 22 to move the gripping portion 21 toward the cutting mechanism 10 and calculate the scrap material calculated in the above (5). Advance by the length M (see FIG. 3).

(7) The control means 51 causes the cutting mechanism 10 and the feeding mechanism 20 to perform the operation (3).

(8) Thereafter, the control means 51 sets the long material W1
(2) and (3) until the main cutting operation is completed
Repeat the above steps.

As described above, according to the first embodiment, the length of the end material is calculated and calculated at a predetermined stage of the long material cutting operation, instead of leaving the end material at the rear end of the long material W. As a result, all cutting operations over the entire length of the long material W can be automatically performed, thereby improving work efficiency.

Second Embodiment FIG. 4 is a schematic diagram of a long material cutting device (hereinafter, simply referred to as a cutting device) to which a long material cutting method according to a second embodiment of the present invention is applied. As shown in FIG. 4, this cutting device S1 is a modification of the cutting device S of the first embodiment.
The scrap length correction means 53 for correcting the scrap length M calculated by the above is added.

The end material length correcting means 53 is provided with an arithmetic processing means for minimizing an error occurring in the length of the cut material located at the rear end of the long material W (hereinafter, referred to as a rear cut material). This is for correcting the scrap material length M calculated by 52. Specifically, as shown in FIG. 5, the length of the cut material obtained by cutting the long material W fed by the feed amount L with the saw blade 11 is equal to the cutting allowance T of the saw blade 11. Just shortened to L _S
However, in the cutting method of the first embodiment, since the feed amount L is also assigned to the rear end cut material, the rear end cut material is longer than the other cut materials by the cutting margin T.

The scrap length correction means 53 is shown in FIG.
As shown, the length of the rear cut material is L_SThe operation is
The offcut length M calculated by the processing means 52 is the true offcut length.
Sa M _T= M + T.

As described above, according to the second embodiment, the length M of the cut material is corrected in consideration of the cutting margin T of the saw blade 11, so that the length of the cut material at the rear end is increased. Errors can be reduced.

The remaining structure, operation and effect of the second embodiment are the same as those of the first embodiment.

[0043]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below more specifically based on more specific embodiments.

Example FIG. 7 shows a cutting result obtained by cutting three long materials by the cutting apparatus S1 of the second embodiment. Here, this long material has a diameter of 55 mm and a length of 6 m. The required cutting material length is 121.2 mm, and the saw blade thickness (cutting allowance) is 1.5.
mm, the feed amount L is set to 122.7 mm.

As shown in FIG. 7, the distance between the length of the cut material at the rear end and the required length of the cut material is 0.1 m for any long material.
It is understood that while there is an error of m, an error of about ± 0.1 mm also exists between the length of the other cut material and the required cut material length. From this, the rear end cut material length also
It is understood that the same precision as other cut material lengths is secured. From this result, it is understood that the cutting operation of the long material can be completely automated by the cutting device S1 and the necessary cutting accuracy can be secured.

Although the present invention has been described based on the embodiments and the examples, the present invention is not limited to the embodiments and the examples, and various modifications are possible. For example, in the embodiment and the example, in the feeding operation subsequent to the feeding operation in which the rear end of the long material is detected, the long material is fed by the length of the scrap and cut. Instead, it is sufficient to cut the length of the long material from the rear end to before the feeding of the second cut material by an amount corresponding to the length of the end material.

The feed mechanism is the feed mechanism 2 of the embodiment.
The pinch roller 7 is not limited to 0, and may be disposed so as to sandwich the long material W, for example, as shown in FIG.
It may be set to 0. In this case, the feed amount detecting means 30A
Outputs a pulse signal of a number corresponding to the number of rotations of the touch roller 80 brought into contact with the long material W so as to rotate in accordance with the feeding of the long material W to the control operation unit 50, for example, a rotary It is an encoder.

Further, the rear end detecting means is not limited to the rear end detecting means 40 of the embodiment, and may be, for example, a laser type width sensor 90 having a predetermined length as shown in FIG. In this case, it is possible to detect the feeding amount of the long material W after the trailing end is detected by the laser width sensor 90, so that it is not necessary to separately provide the feeding amount detecting means 30.

[0049]

As described in detail above, according to the present invention,
Rather than leaving the offcuts at the rear end of the long material, the length of the offcuts is calculated at a predetermined stage of the long material cutting work, and the length of the offcuts is to be cut by an equivalent length. An excellent effect is obtained in that all cutting operations over the entire length can be automatically performed, and work efficiency is improved.

According to a preferred embodiment of the present invention, the length of the cut material is corrected in consideration of the cutting margin of the cutting mechanism. An excellent effect that the error generated in the above can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view of an apparatus for cutting a long material to which a method for cutting a long material according to a first embodiment of the present invention is applied.

FIGS. 2A and 2B are explanatory diagrams of the principle of calculating the end material length, wherein FIG. 2A shows a state immediately before a trailing end of a long material is detected, and FIG. Shows a state in which the paper is fed by one feed length from the state of FIG.

FIGS. 3A and 3B are explanatory diagrams of a cutting material cutting operation by the cutting device of the embodiment, wherein FIG. 3A shows a state in which calculation of the cutting material length is completed, and FIG. This shows a state in which feed is performed for the length of the offcuts calculated from the state shown in FIG.

FIG. 4 is a schematic diagram of an apparatus for cutting a long material to which a method for cutting a long material according to a second embodiment of the present invention is applied.

FIG. 5 is a diagram illustrating that an error occurs in the length of the cut material located at the rear end of the long material according to the method for cutting a long material in the first embodiment.

FIG. 6 is an explanatory diagram of end material length correction by end material length correction means.

FIG. 7 is a table showing cutting results obtained by actually cutting a long material by the cutting apparatus according to the second embodiment.

FIG. 8 is a schematic diagram illustrating an example in which a feeding mechanism and a feeding amount detecting unit are modified in the embodiment.

FIG. 9 is a schematic diagram illustrating an example in which a rear end detection unit is modified in the embodiment.

FIG. 10 is a schematic view of a conventional long material cutting apparatus.

FIG. 11 is a diagram illustrating that when a long material is cut by the same device, a scrap is generated at the rear end of the long material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cutting mechanism 20 Feeding mechanism 30 Feeding amount detection means 40 Rear end detection means 50 Control operation part 51 Control means 52 Operation processing means 53 Remnant length correction means 60 Input means M Remnant length S Cutting equipment for long materials W long material

Claims (6)

[Claims] 1. A method for cutting a long material at a predetermined interval, the method comprising: calculating a length of a scrap material generated in the long material at a predetermined stage of the cutting operation; A method for cutting a long material, comprising cutting a portion corresponding to the length of the end material. 2. A feeding device for detecting a trailing end of the long material during the feeding operation of the long material, and detecting a feeding amount of the long material until the feeding operation is completed after the detection of the trailing end. 2. The method for cutting a long material according to claim 1, wherein the length of the scrap material generated in the long material is calculated based on the fed amount. 3. The method for cutting a long material according to claim 1, wherein the calculated length of the scrap is corrected based on a cutting allowance of the long material. 4. A cutting device for a long material for cutting a long material at a predetermined interval, a cutting mechanism, a feeding mechanism for feeding the long material to the cutting mechanism, and feeding of the long material. A feed amount detecting means for detecting an amount, a trailing end detecting means for detecting a trailing end of the long material, and a control operation unit, wherein the control operation unit detects the feed amount detecting means and the trailing end detection The length of the offcuts generated in the long material is calculated based on the output signal of the means, and the cutting mechanism and the feeding mechanism are controlled, whereby the long material is calculated at a predetermined stage of the cutting operation. An apparatus for cutting a long material, wherein the length of the cut material is fed to a cutting mechanism for cutting. 5. A feeding amount detecting means for a time between a time when a rear end of a long material is detected by a rear end detecting means during a feeding operation of a long material and a time when the feeding operation is completed, by a control operation unit. 5. The apparatus according to claim 4, wherein the length of the offcuts is calculated based on the amount of feed detected by the method. 6. The cutting device for a long material according to claim 4, wherein the control calculation unit corrects the length of the scrap material calculated based on the cutting allowance of the cutting mechanism.