JP3662652B2 - Cutting device for amorphous magnetic alloy strip - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting device for cutting an amorphous magnetic alloy strip.
[0002]
[Prior art]
As an iron core material with low loss, amorphous magnetic alloys are attracting attention. Since the amorphous magnetic alloy is provided in the form of a strip (thin ribbon) having a very thin thickness, when the iron core is formed using this magnetic alloy, a structure of a wound core is often adopted.
[0003]
When manufacturing a wound iron core using a laminated body of amorphous magnetic alloy strips, a predetermined number (for example, 8 to 16) amorphous magnetic alloy strips are used instead of handling a single strip in order to reduce man-hours. It is desirable to handle the laminate as a laminate. In the case of manufacturing a wound core using a laminated body of strips, the length is sequentially increased by 2πt (t is the thickness of the laminated body) by cutting a composite strip formed by superposing a plurality of strips. A large number of unit laminates are formed. Next, a plurality of unit laminates each having a length of 2πt are laminated while laminating each end position in the longitudinal direction by a predetermined shift dimension, thereby providing a plurality of laminate blocks constituting each part of the iron core. A plurality of laminate blocks are sequentially wound around the winding frame, and both ends of each unit laminate body are butt-joined (butt-joined) or overlap-joined (lap-joined), so that the joint portion is connected to the yoke part. A wound core with a structure distributed in a staircase is manufactured.
[0004]
When manufacturing the above-described wound iron core, it is necessary to form a unit laminate formed by laminating a predetermined number of amorphous magnetic alloy strips as the basic material, and when forming the unit laminate Needs to cut a composite strip formed by polymerizing a plurality of amorphous magnetic alloy strips into a predetermined length.
[0005]
As a cutting device for cutting the amorphous magnetic alloy strip, a general cutting device (shear) having a lower blade and an upper blade is used.
[0006]
[Problems to be solved by the invention]
When a strip is cut by a cutting device having a lower blade and an upper blade, a large burden is placed on the blade when starting and finishing cutting the strip. In particular, since amorphous magnetic alloys are hard, the burden on the blade of the cutting device is large.
[0007]
However, in the conventional cutting device that cuts the strip with the lower blade and the upper blade, the positional relationship between the lower blade and the upper blade and the strip to be cut is always constant. There is a problem that certain parts of the blade (especially the parts corresponding to the start and end of cutting of the strip) are overworked, and the lower blade and upper blade are overworked early, resulting in shortened blade life. .
[0008]
An object of the present invention is to provide a cutting apparatus for an amorphous magnetic alloy strip capable of extending the life of a blade as compared with the prior art.
[0009]
[Means for Solving the Problems]
The present invention provides a strip feed for feeding a lower blade held by a lower blade holder, an upper blade supported by the upper blade holder, and an amorphous magnetic alloy strip as an object to be cut between the lower blade and the upper blade. and a feeding device, the upper blade and more lower blade, amorphous magnetic alloy strip to cut the amorphous magnetic alloy strip having a smaller width dimension L than the effective length W of the upper and lower blades along the width direction This relates to the cutting device.
[0010]
In the present invention, a shear blade moving device for moving the upper blade and the lower blade in the width direction of the amorphous magnetic alloy strip is provided.
[0011]
As described above, the upper blade and the lower blade can be moved in the width direction of the strip, and the positional relationship between the upper blade and the lower blade and the strip can be appropriately changed. Distributing the heavily used parts of the upper and lower blades, and using the entire blade uniformly, it is possible to prevent the specific part of the blade from being lost early and prolong the life of the blade it can.
[0012]
The present invention is particularly useful when cutting a laminated body formed by laminating a plurality of amorphous magnetic alloy strips.
[0013]
In a generally used cutting apparatus, the lower blade holder is fixed to the shear frame, the upper blade holder is supported so as to move up and down with respect to the shear frame, and the upper blade holder is moved up and down by the upper blade drive mechanism. It is driven in the direction. When the present invention is applied to such a cutting device, the shear frame is supported so as to be movable along the guide rail extending in the width direction of the amorphous magnetic alloy strip fed by the strip feeding device. Each time the amorphous magnetic alloy strip is cut a set number of times, the shear frame is moved so that the upper blade and the lower blade are moved by a unit movement amount set in the width direction of the strip.
[0014]
The shear blade moving device includes a nut fixed to the shear frame, a ball screw screwed to the nut, and a motor that rotationally drives the ball screw, and moves the shear frame back and forth along the guide rail. And a motor control device for controlling the motor of the shear frame moving mechanism to move the upper blade and the lower blade by a set unit movement amount in the width direction of the strip every time the amorphous magnetic alloy strip is cut a set number of times. Can be configured.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show a configuration example of a cutting device to which the present invention is applied. FIG. 1 is a perspective view of the cutting device, and FIG. 2 is a side view. In FIGS. 1 and 2, reference numeral 1 denotes a base plate placed on the floor surface of the installation site of the cutting device, and 2 denotes a shear frame supported on the base plate 1 via a support device 3. The shear frame 2 is provided with a plate-like shear unit base 4 arranged in parallel with the base plate 1, and is provided so as to rise vertically upward from the upper part of the shear unit base 4. Plate-like vertical frame 5 and reinforcing plates 6 and 6 ′ provided between one side of vertical frame 5 and shear unit base 4 and fixed to vertical frame 5 and base 4. ing. The vertical frame 5 is arranged in a state where the plate surface thereof is orthogonal to the feeding direction (the arrow Y direction in the figure) of the amorphous magnetic alloy strip S that is a workpiece, and the strip S is passed through the vertical frame 5. A window portion 5a for allowing passage is formed.
[0016]
A lower blade holder 7 is provided in a state adjacent to the lower portion of the surface opposite to the surface to which the reinforcing plate 6 of the vertical frame 5 is fixed, and the lower blade holder 7 is bolted onto the shear unit base 4. ing. The lower blade 8 is held at a portion of the lower blade holder 7 facing the window portion 5a with its longitudinal direction oriented in a horizontal direction perpendicular to the feeding direction of the strip S.
[0017]
An upper blade holder 9 is disposed above the lower blade holder 7, and a pair of guide shafts 10, 10 fixed to both ends of the lower blade holder 7 are fitted in holes provided in the upper blade holder 9. . An upper blade holder 9 is supported by guide shafts 10 and 10 so as to be movable up and down, and an upper blade 11 disposed in an inclined state with respect to the horizontal direction so as to form a predetermined shear angle with the lower blade 8. The upper blade holder 9 is held at a portion facing the window portion 5a.
[0018]
A straight guide rail 12 extending in the vertical direction is fixed to the surface of the vertical frame 5 on the upper blade holder side, and a slider 13 fixed to the upper blade holder 9 is slidable on the straight guide rail 12 via a linear bearing 14. It is supported by.
[0019]
A crank drive motor 15 and a speed reducer 16 that decelerates the rotation of the motor 15 are attached to the upper portion of the vertical frame 5, and an output shaft 16 a of the speed reducer 16 is coupled to an eccentric position of the crankshaft 17. . The crankshaft 17 is rotatably fitted in a hole provided at one end of the crank rod 18, and the other end of the crank rod 18 is rotatably connected to the slider 13 via a shaft 19.
[0020]
In this example, the crank driving motor 15, the speed reducer 16, the crank shaft 17, the crank rod 18, and the slider 13 constitute an upper blade driving mechanism 20 that moves the upper blade holder 9 up and down. In this drive mechanism, when the motor 15 rotates in one direction, the output shaft 16a of the speed reducer 16 rotates in one direction, and the crankshaft 17 coupled to the output shaft 16a at an eccentric position is connected to the output shaft 16a. It rotates about 16a. The crankshaft 17 displaces the slider 9 downward via the crank rod 18 in the first half of one rotation to displace the upper blade holder 9 toward the lower blade holder 7 side. In this process, the upper blade 11 is displaced toward the lower blade 8 and shears the workpiece. The crankshaft 17 also displaces the crank rod 18 and the slider 13 upward in the latter half of one rotation, and displaces the upper blade holder 9 to the upper retracted position.
[0021]
As shown in FIG. 2, a material presser 21 that presses the workpiece against the lower blade holder 7 when the workpiece is cut is supported at the lower end of the upper blade holder 9 so as to be movable up and down. The material presser is always biased downward by a spring 22.
[0022]
Also provided on the base plate 1 are a feed roller 23 that is rotationally driven by an electric motor (not shown) and a press roller 25 that is pressed against the feed roller 23 by a pressure cylinder 24. A strip feeding device 26 that feeds the amorphous magnetic alloy strip S between the roller 25 and the lower blade 8 and the upper blade 11 is fixed, and the feeding device 26 and the lower blade holder 7 are fixed to each other. Between them, a guide table 27 for delivering the strip S is arranged.
[0023]
The strip fed by the strip feeding device 26 may be a single amorphous magnetic alloy strip, or may be a laminate of a plurality of strips (for example, a few to a dozen).
[0024]
The support device 3 for supporting the shear frame 2 with respect to the base plate 1 is perpendicular to the width direction of the strip S fed by the strip feeding device 26 (in the example shown, orthogonal to the feeding direction of the strip S). It is configured to be able to reciprocate linearly along the horizontal direction (X, X ′ direction in FIG. In the illustrated example, two guide rails 30 and 31 extending in parallel along the width direction of the strip S as the object to be cut are fixed on the base plate 1 and fixed to the lower surface of the shear unit base 4. 32 and 33 are engaged with the guide rails 30 and 31, respectively, and the shear frame 2 is supported so as to reciprocate in the width direction of the strip S via the linear bearings 32 and 33 and the guide rails 30 and 31, respectively.
[0025]
A nut 34 is also fixed to the lower surface of the shear unit base 4, and a ball screw 36 rotatably supported by a bearing device 35 fixed to the base plate 1 is screwed into the nut 34. A toothed pulley 37 is fixed to the end of the ball screw 36, and a toothed pulley 39 attached to the output shaft of an electric motor 38 with a reduction gear fixed to the base plate 1 and a toothed pulley 37 attached to the ball screw. The timing belt 40 is stretched over.
[0026]
Therefore, when the electric motor 38 is rotated, the ball screw 36 is rotated by the electric motor, and the nut 34 is linearly moved by the rotation of the ball screw 36, so that the shear frame 2 is moved in the width direction of the strip S (X, X in FIG. 1). ′ Direction). By changing the rotation direction of the electric motor 38, the moving direction of the shear frame 2 can be changed.
[0027]
Although not shown in FIGS. 1 and 2, a control device for controlling the electric motor for driving the crank drive motor 15 and the feed roller 23 and the electric motor 38 for driving the shear frame 2 is provided. The strip feeding device 26 and the upper blade drive mechanism 20 are controlled so as to cut the strip S into a predetermined length, and the amorphous magnetic alloy strip S is cut a set number of times (usually one to several times). Each time the shear frame 2 is moved, the electric motor 38 is controlled so that the upper blade 11 and the lower blade 8 are moved by the unit movement amount ΔX set in the width direction of the strip S.
[0028]
As a result of moving the shear frame 2 to one side in the width direction of the strip by the unit movement amount ΔX and moving the upper blade and the lower blade by the unit movement amount ΔX a predetermined number of times, the positions of the upper blade and the lower blade are within the movement range. When the limit position is reached, the moving direction of the shear frame is reversed, and the upper blade and the lower blade are moved by the unit movement amount ΔX to the other side in the width direction of the strip every time the strip is cut. Move. A series of cutting operations of the strip S are performed while repeating these operations.
[0029]
In the illustrated example, each time the amorphous magnetic alloy strip S is cut a set number of times by the nut 34, the ball screw 36, the motor 38, the pulleys 37 and 39, the timing belt 40, and the control device of the motor 38, the shear frame 2 is removed. A shear blade moving device is configured to move the upper blade 11 and the lower blade 8 by a unit movement amount set in the width direction of the strip S.
[0030]
A control device that controls the crank driving motor 15 that drives the upper blade 11, the electric motor that drives the feed roller 23, and the electric motor 38 that drives the shear frame is realized by a microcomputer (not shown). FIG. 3 is a flowchart showing an example of an algorithm of a program executed by the microcomputer to realize the control device.
[0031]
In the example shown in FIG. 3, as shown in FIG. 4, the effective length of the upper blade and the lower blade (hereinafter collectively referred to as shear) is W, the width of the strip S as an object to be cut is L, and the shear is Is represented by a distance CP between the center position of the shear and one end thereof. As shown in FIG. 4, the variable CP when the center position in the length direction of the shear (upper blade and lower blade) coincides with the center position in the width direction of the strip S is defined as the origin position, and the variable CP when the shear is at the origin position. Let C be the value of. Further, the moving direction of the shear to one side in the width direction of the strip S is a plus direction, and the moving direction to the other side is a minus direction.
[0032]
In the case of the algorithm shown in FIG. 3, when the cutting of the strip is started, first, the shear is returned to the original position in Step 1. Next, after each part is initialized in step 2, a value C giving the origin position is stored in the RAM storing the shear position CP, and the unit movement amount B in the plus direction is stored in the RAM storing the unit movement amount ΔX of the shear. Remember. Further, from the effective length W of the blade and the width L of the strip, plus direction limit value max = {(W−L) / 2} + CP indicating the limit position of the moving range of the shear in the plus direction, and movement in the minus direction. A minus direction limit value min = {CP− (W−L) / 2} indicating the limit position of the range is calculated and stored in the RAM.
[0033]
Next, in step 3, the strip S is fed by a predetermined length, and in step 4, the crank drive motor 15 is driven to displace the upper blade 11 toward the lower blade 8, thereby cutting the strip S. Next, in step 5, the electric motor 38 is driven to move the shear in the plus direction by the unit movement amount ΔX, and ΔX is added to the variable CP indicating the shear position. Next, at step 6, it is determined whether or not the variable CP indicating the shear position exceeds the limit value max. As a result, if the variable CP is less than or equal to the limit value max on the plus side, step 7 is executed to determine whether or not the variable CP is less than or equal to the limit value min on the minus side. As a result, when the variable CP is not less than the minus limit value min, the process returns to step 3 to feed the next strip.
[0034]
When it is determined in step 6 that the variable CP exceeds the limit value max on the plus side, step 8 is executed to store the unit movement amount ΔX of the shear unit movement amount in the negative direction− Store A and return to step 3.
[0035]
On the other hand, if it is determined in step 7 that the variable CP is equal to or less than the limit value min in the minus direction, step 9 is executed and the unit movement amount in the plus direction + B is stored in the RM that stores the unit movement amount Δx of the shear. After returning to step 3, return to step 3.
[0036]
In the case of the algorithm shown in FIG. 3, each time the strip is cut, the shear is moved by one unit movement amount ΔX to one side in the width direction of the strip. After the shear reaches the limit position of the moving range to one side in the width direction of the strip, the shear moves by the unit movement amount ΔX to the other side in the width direction of the strip every time the strip is cut. Be made. In this way, every time the strip is cut, the shear is moved by a set distance ΔX, so that the heavily used part of the blade can be dispersed and the entire blade can be used uniformly. It is possible to prolong the life of the blade by preventing the occurrence of defects at a specific part of the blade at an early stage.
[0037]
In the example shown in FIG. 3, if the unit movement amount B in the plus direction of the shear is different from the unit movement amount A in the minus direction, the probability of cutting at the same position of the blade is lowered. The lifespan of can be further extended.
[0038]
When the cutting device is controlled by causing the microcomputer to execute the program shown in FIG. 3, a strip for feeding the amorphous magnetic alloy strip S between the upper blade and the lower blade by a predetermined length in step 3 The feeding means is realized, and the shear control means for driving the upper blade toward the lower blade side when the strip feeding is completed is realized by step 4. Further, in step 5, when it is detected that the cutting is completed, the shear frame is moved so that the upper blade and the lower blade are moved in the width direction of the strip by the set unit movement amount ΔX. A motor control means for driving the shear frame for controlling the electric motor 38 is realized.
[0039]
Further, step 6 provides a first limit position detecting means for detecting that the shear has reached the limit position of the moving range to one side in the width direction of the strip, and step 7 realizes the shear in the width direction of the strip. A second limit position detecting means for detecting that the limit position of the movement range to the other side has been reached is realized.
[0040]
Further, when it is detected in step 8 that the shear has reached the limit position of the moving range to one side in the width direction of the strip, the unit movement amount when moving the shear to the other side in the width direction of the strip The first unit movement amount setting means for setting ΔX is realized, and the shear is stripped when step 9 detects that the shear has reached the limit position of the movement range to the other side in the width direction of the strip. The second unit movement amount setting means for setting the unit movement amount ΔX when moving to one side in the width direction is realized.
[0041]
In order to extend the life of the blade, it is preferable to move the shear by ΔX every time the strip is cut as in the example shown in FIG. However, the present invention is not limited to the case where the shear is moved every time when the strip is performed, and the shear may be moved by the set distance ΔX every time the strip is cut a plurality of times.
[0042]
【The invention's effect】
As described above, according to the present invention, the upper blade and the lower blade can be moved in the width direction of the strip, and the positional relationship between the upper blade and the lower blade and the strip can be appropriately changed. Because it is configured, the parts of the upper blade and the lower blade that are overused can be dispersed to use the entire blade uniformly, and it is possible to prevent certain parts of the blade from being lost early and to prolong the life of the blade. can do.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration example of a main part of a cutting apparatus according to the present invention.
FIG. 2 is a side view of the cutting device of FIG.
FIG. 3 is a flowchart showing an example of an algorithm for controlling the cutting apparatus according to the present invention.
FIG. 4 is an explanatory diagram for explaining a positional relationship between an upper blade, a lower blade, and a strip.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base plate 2 Shear frame 3 Shear frame support apparatus 7 Lower blade holder 8 Lower blade 9 Upper blade holder 10 Guide shaft 11 Upper blade 13 Slider 15 Crank drive motor 16 Reducer 17 Crank shaft 18 Crank rod 20 Upper blade drive mechanism 26 Strip feeding device 30, 31 Guide rail 32, 33 Linear bearing 34 Nut 36 Ball screw 38 Electric motor

Claims (2)

A lower blade held by a lower blade holder fixed to the shear frame, an upper blade held by an upper blade holder supported so as to be movable up and down with respect to the shear frame, and the upper blade holder in the vertical direction An upper blade drive mechanism for moving the upper blade up and down and a strip feeding device for feeding an amorphous magnetic alloy strip as a workpiece between the lower blade and the upper blade, In the amorphous magnetic alloy strip cutting apparatus, the upper blade and the lower blade cut along the width direction the amorphous magnetic alloy strip having a width dimension L smaller than the effective length W of the upper blade and the lower blade.
  The shear frame is supported so as to be movable along a guide rail extending in the width direction of the amorphous magnetic alloy strip fed by the strip feeding device,
  A shear blade moving device is provided that moves the shear frame each time the amorphous magnetic alloy strip is cut a set number of times to move the upper blade and the lower blade by a unit movement amount set in the width direction of the strip. A device for cutting an amorphous magnetic alloy strip, comprising: A lower blade held by a lower blade holder fixed to the shear frame, an upper blade held by an upper blade holder supported so as to be movable up and down with respect to the shear frame, and the upper blade holder in the vertical direction An upper blade drive mechanism for moving the upper blade up and down and a strip feeding device for feeding an amorphous magnetic alloy strip as a workpiece between the lower blade and the upper blade, In the amorphous magnetic alloy strip cutting apparatus, the upper blade and the lower blade cut along the width direction the amorphous magnetic alloy strip having a width dimension L smaller than the effective length W of the upper blade and the lower blade.
  The shear frame is supported so as to reciprocate along a guide rail extending in the width direction of the amorphous magnetic alloy strip fed by the strip feeding device,
  A shear frame moving mechanism that includes a nut fixed to the shear frame, a ball screw screwed to the nut, and a motor that rotationally drives the ball screw, and reciprocally moves the shear frame along the guide rail; A motor control device for controlling the motor of the shear frame moving mechanism so as to move the upper blade and the lower blade by a unit movement amount set in the width direction of the strip each time the amorphous magnetic alloy strip is cut a set number of times; A cutting device for an amorphous magnetic alloy strip, comprising a shear blade moving device provided.

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