JPH07110445B2 - Slitter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter, and more particularly, to a slitter that is compact and easily adjusts slit width and / or clearance between round blades or overlap.

[Prior art and problems]

Conventionally, a slitter is a device for obtaining a narrow strip by slitting (longitudinally dividing) a wide strip into one or more pairs of round blades incorporated in a pair of long axis arbor.

However, the work of precisely incorporating a round blade into each long-axis arbor and maintaining at least a proper clearance or overlap between the pair of upper and lower round blades requires a very high level of skill, and even a skilled person can easily perform it. The fact is that the number of people who can do this is extremely small, especially regarding the work of incorporating the arbor for a multi-row slitter.

Actually, a plurality of sets of spacers and round blades are alternately combined with the long-axis arbor to fix the round blades, or the long-axis arbor that expands and contracts by hydraulic pressure is expanded to fix the blades to the shaft.

Then, the final adjustment of the clearance between the round blades is made by the operator using a skim gauge or by observing the state of transmitted light.

In other words, there is no quantitative or automatic adjustment method for the clearance adjustment, which is the most important adjustment of the slitter, and there is no means other than relying on the intuition of an expert who is supported by advanced experience. is there.

Therefore, in the metal strip manufacturing plant that has recently been required by users to perform high-mix low-volume production, it is necessary to prepare many pairs of built-in long axis arbors in order to meet the width demanded by users. There was a problem that it was not possible to cope with the production plan and sudden changes in user specifications.

Moreover, even if one of the round blades is chipped or abnormally worn, the entire long-axis arbor must be reassembled, which is a troublesome problem.

Further, in the pair of long-axis arbor that had been assembled once, fine adjustment of the slit width was almost impossible, which was extremely inconvenient.

[Problems to be solved by the invention]

An object of the present invention is to provide a slitter in which the slit width, clearance between round blades, and overlap between round blades can be easily adjusted.

Another object of the present invention is to provide a slitter provided with a round blade unit automatic adjustment mechanism capable of quantitatively and automatically adjusting the slit width, the clearance between round blades, and the overlap between the round blades.

That is, it is a problem to be solved by the present invention to provide a slitter that can be easily adjusted by anyone regardless of a special skill.

[Structure of Invention]

According to the present invention, at least one pair of round blade units cantilevered or supported on both sides by respective short axes parallel to the long axis perpendicular to the strip running direction, and at least one pair of round blade units are provided. One is slidable in the long axis direction (X axis direction),
Further, at least the distance between the minor axes of each pair of round blade units can be adjusted toward and away from each other, and one of the round blade units is equipped with a load cell LT for measuring the thrust load in the minor axis direction, and either A slitter equipped with a cutter device in which one round blade unit has a load cell LR for measuring a radial load, a microcomputer in which each output is input through a display device that displays the thrust load and the radial load, and the thrust The point at which the load and / or radial load rises is captured as a zero point, and a signal for adjusting the round blade position in the long axis direction (X axis direction) or the short axis direction is output to a previously stored position. There is provided a slitter characterized by including the round blade unit automatic adjusting mechanism.

The present invention will be described in detail below with reference to examples.

〔Example〕

 FIG. 8 is a partial sectional front view showing an embodiment of the present invention.

In FIG. 8, reference numeral 1 denotes a strong housing having a box-shaped cross section, and contains four sets of cutter devices. Each cutter device is composed of a pair of round blade units 3, 3 and a mounting base 2, 2.

In FIG. 8, the strip to be slit travels perpendicularly (to the front side) to the paper surface, so that the major axes 100, 100 are perpendicular to the strip travel direction.

Which one of the mounting bases 2, 2 that supports each round blade unit 3, 3
One of them is a traverse cylinder device (or screw device) which is slidable in the long axis (X axis) direction.

Further, each round blade unit has short shafts 200, 200 parallel to the long axis 100 (corresponding in FIG. 8), and round blades 6, 6 are fixed to the tips thereof, respectively. Bearing 4,
It is pivotally attached to the round blade units 3, 3 via 5. At least one of the bearings 4 and 5 needs to be a thrust roller bearing, a double row ball bearing, or the like. Here, the round blades 6, 6 are cantilevered by the round blade units 3, 3. The round blade support may be a double-sided support designed compactly, but the cantilever support has an advantage that the slit width can be narrowed.

Further, a lifting screw device (or a cylinder device) for adjusting the distance between the short shafts 200, 200 by moving them closer to or away from each other (in the Y-axis direction) is built in either one of the mounting bases 2, 2.

The traverse screw device and the elevating screw device can be built in one mounting base.

9 and 10 are a front view and a side view, respectively, showing another embodiment of the present invention.

The circular blade can be driven by a means such as a single motor 50 that drives the splined shaft 51, the pulley 52 and the toothed belt 53 synchronously.

Although the mounts 2 are fixed to the upper and lower beams of the frame 1, they can be slid separately in the left-right direction. Therefore, the slit width can be changed by moving the cutter device consisting of a pair of upper and lower round blade units while keeping the round blade clearance and overlap constant.

In this case, however, the pair of upper and lower mounts must be synchronously driven by precision screw screws 54 (driven by the servo motor 55) pivotally attached to the frame.

FIG. 1 is a conceptual diagram of an essential part (thrust load measuring and adjusting device) of an embodiment of the present invention.

The round blade unit 3 is attached to the mounting base via a sliding base 7 that is hung under the mounting base 2 and can slide only in the direction of the short axis 200. The slide base 7 is biased to the left by an elastic body 12 to avoid the influence of backlash.

The lower round blade is fixed in the left-right direction. Without inserting the strip, the upper and lower round blades are moved closer to each other so that there is an overlap 11 between the upper and lower round blades (by a Y-axis direction cylinder device described later), and the upper round blade is set by the motor 13 and the movable wedge 9. When moved to the right, the upper and lower round blades come into contact,
Axial thrust load is generated. The thrust load is detected by the load cell LT and input to the microcomputer 10 via the display device 8. In addition,
In this case, the data may be directly input to the microcomputer 10 without using the display device 8.

The microcomputer 10 drives the motor 13 such as a servomotor to move the slide base 7 minutely so that the clearance between the upper and lower round blades becomes a preset clearance.

The starting point of the movement is the zero point that detects the moment when the upper and lower round blades 6, 6 contact each other in the X-axis direction.

The method of detecting the zero point will be described in more detail.

In the device of the present invention shown in FIG. 1, there is no material to be cut between the upper and lower round blades, the motor 13 is driven until the round blades are sufficiently in contact with each other from an overlapping state and a clearance (clearance +). I will gradually narrow it. At this time, if the indicated value of the scale 14 is recorded in the X coordinate and the indicated value of the load indicating device 8 of the load cell is recorded in the T coordinate, a value as shown by a point in FIG. 2 is obtained. The points in the group parallel to the X-axis represent the elastic body preload before the round blades touch each other.
Let a be a straight line obtained from the group of points. A group of points having a certain gradient on the X axis represents a value obtained by adding a reaction force when the round blades contact each other to the preload. Therefore, if the straight line obtained from this group of points is b, then the inclination of b indicates the axial rigidity of the cutter device. Also, the intersection c of the straight lines a and b
The X coordinate of indicates the position when the circular blades start to contact each other, that is, the position where the clearance is zero. Therefore, once the zero point is known, the clearance adjustment value can be read by the scale 18 from the position where the clearance is zero. In this way, the rigidity of the cutter device can be known, and the zero clearance point of the blade and the clearance amount can be quantitatively adjusted.

Next, there is no material to be cut and the circular blades are overlapped, and the clearance is set by the motor 13 and the wedge 9 as shown in FIG.
Adjust to near the point and make the round blade contact with a constant force.
When the circular blade is rotated in this state and the rotation angle is recorded on the X coordinate and the value indicated by the load indicating device 8 of the load cell at that time is recorded on the T coordinate, a curve value as shown by the point in FIG. 3 is obtained. Let this curve be θ. The change of the curve e is caused by the axial deflection of the round blades that are in contact with each other, and the amount of the deflection can be obtained from the axial rigidity of the cutter device which has already been obtained. From the result, it is possible to quantitatively determine the final runout after mounting the round blade, and to quantitatively judge the state of the blade.

Of course, the adjustment of the X-axis direction for detecting the zero point can be done manually with a screw.

Next, a method of automatically controlling the clearance 20 using the microcomputer 10 will be described.

In the apparatus of the present invention shown in FIG. 1, a servo motor 13 automatically operates a wedge 9 for moving the round blade unit from a state in which there is no material to be cut, an overlap is present, and a clearance is in the vicinity of point C where the blades contact each other. To move it. At this time, the reading value of the scale 18 and the load indicating device 8 of the load cell LT
Is input to the microcomputer at an appropriate frequency, and the microcomputer is made to recognize the points of the group parallel to the X axis shown by the points in FIG. FIG. 2 is a graph showing the relationship between the position of the round blade in the X-axis direction and the thrust load. From the information of this point, the equation of the straight line a is obtained by the least square method or the like. Furthermore, after the circular blades touch each other, the wedge 9 is automatically moved to near the X coordinate of point C, and then the load cell LT
Move the wedge 9 until becomes an appropriate value. At this time, the indicated value of the scale 18 and the indicated value of the load cell LT can be input to the microcomputer at an appropriate frequency so that the microcomputer can recognize a point having a constant gradient on the X axis.
From the information of this point, the equation of the straight line b can be obtained on the microcomputer by the least square method or the like. If the equation of the straight line b is obtained, the rigidity of the cutter device in the X-axis direction can be recognized by the microcomputer from the inclination of the straight line b. Also, straight lines a and b
The value of the X coordinate of the point C can be accurately recognized by the microcomputer by calculating the intersection point c of C on the microcomputer.

If the X coordinate of point C can be recognized by the microcomputer,
The clearance amount instructed by the microcomputer is c
Microcomputer in the direction of opening the clearance from the point
It can be adjusted automatically via 10, servo motor 13 and wedge 9.

Furthermore, a function or a table of the relationship between the hardness and plate thickness of the material to be cut and the optimum clearance is input to the microcomputer in advance, that is, when the characteristics of the material to be cut are input, the optimum clearance is calculated by the microcomputer and the clearance is automatically calculated. Can be adjusted as desired.

FIG. 4 shows a screw device (which may be a cylinder device) which is a round blade overlap adjusting mechanism in the Y-axis direction (a direction between the short axes of the round blade units) and a load cell which detects a radial load, which is an embodiment of the present invention. It is a partial cross-section front view which shows LR. FIG. 5 is a sectional view taken along the line VIII-VIII ′ of FIG.

In FIGS. 4 and 5, the radial load of the circular blade detected by the load cell LR is input to the microcomputer 10 via the display device 8.

In this case, the radial load output of the load cell LR may be directly input to the microcomputer 10 without the display device 8. The microcomputer 10 drives the screw device 31 by the servo motor 32 to raise and lower the lift table 33 of the lower round blade mounting base 2 so that the upper and lower round blades have a preset overlap. The lifting table 33 is pivotally attached to the upper part of the mounting table 2 by a pin 34 to form a swing arm capable of resisting a horizontal force acting on the short axis when the strip is vertically split. There is. In order to kill the backlash of the screw device 31, a downward pressure is applied by an elastic body (spring) and its own weight (pressurizing device).

The starting point of this ascending movement is the zero point at which the level at the moment when the upper and lower round blades 6, 6 contact each other in the Y-axis direction is detected without the strip.

The method of detecting the zero point will be described in detail below.

4 and 5 ... In the device of the present invention, the overlap is gradually narrowed by manual adjustment until there is no material to be cut and the clearance is negative and the round blades are sufficiently in contact with each other. At this time, if the indicated value of the scale 18 is recorded in the Y coordinate and the indicated value of the load indicating device 8 of the load cell is recorded in the R coordinate, a value shown by a point in FIG. 6 is obtained. The points in the group parallel to the Y-axis represent the pressure of the preloading device 12 before the blades touch each other. Let a be a straight line obtained from the group of points. A group of points having a constant gradient with respect to the Y-axis represents a radial load in which the round blades are in contact with each other due to preload and a reaction force thereof is applied. Therefore, if the straight line obtained from this group of points is b, the inclination of b indicates the rigidity of the cutter device in the radial direction of the round blade. The Y coordinate of the intersection c of the straight lines a and b indicates the position when the blades start to contact each other, that is, the position where the overlap is zero. Therefore, once the zero point is known, the adjustment overlap can be read by the scale 18 from the position where the overlap is zero. In this way, the rigidity of the round blade, the zero point of the round blade overlap, and the amount of overlap can be adjusted quantitatively.

Next, when there is no material to be cut and the round blade has a minus clearance, the overlap adjusting device 31 adjusts the position to around point d in FIG. 6 to bring the upper and lower round blades into contact with each other with a constant force. FIG. 6 is a graph showing the relationship between the position of the round blade and the radial load when the upper and lower circular blades make contact with each other on their peripheral surfaces. When the circular blade is rotated in this state and the rotation angle is recorded on the Y coordinate and the value indicated by the load indicating device 8 of the load cell at that time is recorded on the R coordinate, a curve value shown by a point in FIG. 7 is obtained. Let this curve be θ. This change in the curve θ is caused by the radial deflection of the circular blades that are in contact with each other, and the amount of the deflection can be obtained from the already determined rigidity in the radial direction. From the result, the final runout after the mounting of the round blade can be quantitatively obtained, and the state of the round blade can be quantitatively judged.

Next, in FIG. 5, the overlap adjusting device 31 is driven by a servo motor 32, and its control is performed by a microcomputer.
The electric signal obtained by converting the amount of the scale 18 and the detection signal of the load cell are input to the microcomputer 10. The approximate Y-coordinate position of the point C is input to the computer in advance, and in the device shown in FIG. 5, the C point before the circular blades contact each other from the state where there is no material to be cut and the overlap is negative. Adjusting device 31 up to the vicinity of Y coordinate
Is automatically moved by the servo motor 32. This time scale 18
And the value indicated by the load indicating device 8 of the load cell LR are input to the microcomputer 10 at an appropriate frequency so that the microcomputer recognizes the points of the group parallel to the Y axis shown by the points in FIG. The information of this point is obtained by the method of least squares or the like to obtain the equation of the straight line a. Furthermore, Y at point C after the circular blades touch each other
The adjusting device 31 is automatically moved to near the coordinates, and then the adjusting device 31 is moved until the load cell LR reaches an appropriate value.
At this time, the indicated value of the scale 18 and the indicated value of the load cell LR are input to the computer at an appropriate frequency so that the computer recognizes a point having a constant slope on the Y axis. From the information of this point, the equation of the straight line b can be obtained on the microcomputer by the least square method or the like. If the equation of the straight line b is obtained, the microcomputer is made to recognize the vertical rigidity of the cutter unit from the inclination of the straight line b. Further, by calculating the intersection c of the straight lines a and b on the microcomputer, the value of the Y coordinate of the point c can be accurately recognized by the microcomputer.

If the Y coordinate of point C can be recognized by the microcomputer,
Overlap amount c instructed by the microcomputer
One of the round blades is displaced from the point in the direction of opening the clearance, that is, in the short axis direction (X axis direction) of the round blade, and then moved toward the proper overlap position in the Y axis direction by the microcomputer output. Therefore, the cutter unit can be automatically adjusted to the overlap as instructed by the microcomputer.

Furthermore, if the function of the relationship between the hardness, plate thickness, etc. of the material to be cut and the optimum overlap is entered in the microcomputer in advance, the optimum overlap is calculated by the computer according to the characteristics of the material to be cut, and the overlap is calculated. The amount of lap can be adjusted automatically.

〔The invention's effect〕

According to the present invention, the clearance between the circular blades and the overlap can be adjusted quantitatively, and at the same time, the deflection of the blades in the X-axis and Y-axis directions can be quantitatively known. As a result, special skill was required to adjust the clearance and overlap in the past, but it is now possible for anyone to adjust the clearance easily and with high reliability. Since clearance and overlap can be adjusted easily and with high reliability, adjustment time can be shortened, cutting quality can be improved, abnormal wear of round blades can be reduced, and equipment availability can be improved.

Furthermore, since it can be quantified, it becomes possible to import the amount into a computer, and the optimal clearance and overlap are calculated from various information on the computer, and the values are all automatically adjusted to a fully automated clearance. And the overlap adjustment system became possible.

[Brief description of drawings]

FIG. 8 is a partially sectional front view showing an embodiment of the present invention, FIG.
FIG. 10 is a front view and a side view showing another embodiment, respectively.
FIG. 2 is a conceptual diagram of a thrust load measuring and adjusting device according to an embodiment of the present invention, FIG. 2 is a graph showing the relationship between the position of the round blade in the X-axis direction and the thrust load, and FIG. FIG. 4 is a partial sectional front view showing the radial load detecting load cell LR of the embodiment of the present invention, FIG. 5 is a sectional view taken along the line VIII-VIII ′ of FIG. 6, and FIG. The figure is a graph showing the relationship between the Y-axis direction position of the round blade and the radial load when the upper and lower round blades are in contact and stationary on the peripheral surface. 7 is a graph showing the relationship between the rotation angle and the shake in the Y-axis direction. 1 ... Housing, 2 ... Mounting base, 3 ... Round blade unit, 4.5 ... Bearing, 6 ... Round blade, 8 ... Display device, 9 ... Wedge (adjusting device), 10 ... Microcomputer.

Claims (1)

[Claims] 1. At least one pair of round blade units cantilevered or supported by each other short axis parallel to the long axis perpendicular to the strip running direction. At least one is slidable in the major axis direction (X axis direction), and the distance between the minor axes of at least one pair of round blade units can be adjusted toward and away from each other, and one of the round blade units is In a slitter equipped with a load cell LT for measuring the thrust load in the short axis direction, and one of the round blade units equipped with a cutter device equipped with a load cell LR for measuring the radial load, the thruster and the radial load are displayed. A microcomputer to which each output is input via a display device that
The point at which the thrust load and / or radial load rises is captured as a zero point, and a signal for adjusting the round blade position in the long axis direction (X axis direction) or the short axis direction is reached to a previously stored position. A slitter which is characterized by including a round blade unit automatic adjusting mechanism adapted to emit.