JP2001054260A - Manufacture of molding paired roller spiral ring plate and manufacturing apparatus thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure satisfactory quality despite the number of revolutions of molding rollers being changed and the kind of belt material being changed, by delaying the peripheral velocity of a winding part of a winding drum for the predetermined amount from the peripheral velocity of the molding paired roller. SOLUTION: Both motors 5, 18 are driven with an existing number of revolutions command value, when it is checked as to whether a change in number of revolutions command value of a roller drive motor 5 is input from the external side and if there is no such input of change. Under this drive conditions, the peripheral velocity of the winding part of a winding drum 9 is set smaller than the peripheral velocity of column roller 3 for the prescribed amount. When change of number of revolutions command value of the roller drive motor 5 is inputted from an external circuit, this number of revolutions command value is substituted to a built-in map for storing adequate relationship of the number of revolutions of both motors, in order to drive and control the reading of the number of revolutions command value of the drum drive motor 18. As a result, even if the number of revolutions is changed due to the kind of belt material, satisfactory molding can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for manufacturing a spiral roller plate. The present invention can be applied, for example, to a case where a stator core or a rotor core of a rotating electric machine is formed by spirally winding an electromagnetic steel strip with its main surface overlapping.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 387402 discloses a method in which a pair of truncated conical rollers (hereinafter, also simply referred to as "taper rollers") are provided so that both outer peripheral surfaces face each other with a predetermined wedge-shaped gap. By inserting the steel strip into the wedge-shaped gap and performing plastic working, a spiral wheel plate curved to one side of the electromagnetic steel strip is created, and the spiral core plates are stacked so that the main surfaces thereof overlap to form a stator core. It is proposed to make. Hereinafter, a manufacturing method of manufacturing a spiral wheel plate by plastic working of a band-shaped metal plate using a pair of formed rollers arranged with a wedge-shaped gap as described above will be described below. It is called a method.

[0003]

However, according to the method of manufacturing a pair of spiral rollers of the forming roller disclosed in the above-mentioned publication, the electromagnetic steel strip plastically deformed by the pair of forming rollers is freely left to its own weight. Since they are only stacked, it is not easy to align the turns of the spiral wheel plate after plastic deformation by a pair of forming rollers and integrate them in the thickness direction to form a cylindrical core.

[0004] For this reason, the inventors of the present invention take up a spiral wheel plate from a pair of forming rollers by a winding drum that rotates synchronously with the pair of forming rollers, thereby plastically deforming the pair of forming rollers. It was considered that the formation of the cylindrical core was completed almost simultaneously with the completion of the processing.

[0005] However, in the method of manufacturing a pair of spiral rollers, in which the spiral drum is wound by the winding drum, the number of rotations of the pair of spiral rollers is changed in order to improve productivity. Alternatively, when the cross-sectional shape of the electromagnetic steel strip is changed, there have been problems such as a decrease in the plastic deformation accuracy of the electromagnetic steel strip and an unstable operation of the device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a molded roller pair type spiral wheel capable of securing good quality despite a change in the number of revolutions of the molded roller and a change in the type of the band-shaped body. It is an object of the present invention to provide a plate manufacturing method and a spiral wheel plate manufacturing apparatus.

[0007]

According to a first aspect of the present invention, there is provided a method for manufacturing a pair of spiral rollers having a pair of formed rollers, which is opposed to each other with a wedge-shaped gap for plastic deformation therebetween. After the band is bent to one side by rotation of the forming roller, a manufacturing process is employed in which the curved band coming out of the pair of forming rollers is wound around a winding drum.

[0008] This configuration is particularly characterized in that the peripheral speed of the winding portion of the winding drum is delayed by a predetermined amount from the peripheral speed of the forming roller pair.

[0009] For the rotation of the forming roller pair, only one of them may be driven by a motor, or both may be driven by a motor. Hereinafter, the molding roller driven by the motor is sometimes referred to as a driving roller, and the molding roller not driven by the motor is sometimes referred to as a driven roller. The peripheral speed of the forming roller pair referred to in this specification refers to the peripheral speed of the driving roller.

Hereinafter, this will be described in more detail.

The inventors of the present invention usually find that when plastically deforming a band using a pair of forming rollers, slipping occurs between the outer peripheral surface of the driving roller and the band, and therefore, the winding is simply performed. If the machining is performed with the peripheral speed of the take-up drum being equal to the peripheral speed of the drive roller, the take-up drum must be driven extremely strongly by the motor by an amount that does not allow the slippage (the delay speed). Was found. In this case, the pulling force of the take-up drum strongly acts on the belt-shaped body undergoing plastic deformation processing in the wedge-shaped gap between the pair of forming rollers. In this case, there is a problem that the belt-like body undergoing plastic deformation processing is affected and the plastic curvature becomes uneven.

More specifically, the pulling force of the winding drum has a component component acting in the axial direction on the band-shaped body in the wedge-shaped gap between the pair of forming rollers, and as a result, the pulling force of the winding drum Changes the position of the strip in the axial direction (of the pair of forming rollers), thereby changing the width of the wedge-shaped gap at the position of the strip corresponding to the thickness of the strip after plastic deformation. If the winding drum pulls the band in a direction perpendicular to the axis of the forming roller pair, the above component force is eliminated, but the band coming out of the wedge-shaped gap is curved at a predetermined curvature toward one side of the band. For this reason, it has to be pulled in a substantially tangential direction.

In order to solve this problem, the peripheral speed of the winding drum is reduced by the amount of the slippage, and the pulling force of the winding drum acting on the band being plastically deformed between the pair of forming rollers is reduced. It is possible to mitigate the effect of component force,
In this method, the peripheral speed of the pair of forming rollers must be reduced in synchronization, which causes a problem that productivity is reduced.

Therefore, in the present invention, the peripheral speed of the winding portion of the winding drum is set to be smaller than the peripheral speed of the forming roller pair in consideration of the slippage amount. The body is not strongly pulled, and as a result, the influence of the pulling force of the winding portion on the plastic deformation of the strip can be reduced.

According to a second aspect of the present invention, in the method of manufacturing a pair of spiral rollers according to the first aspect, when the peripheral speed of the pair of forming rollers is changed, the predetermined amount (forming (The peripheral speed of the roller pair-the peripheral speed of the winding portion) is changed based on a relationship having a positive correlation with the peripheral speed of the forming roller pair.

That is, as the peripheral speed of the forming roller pair increases, the predetermined amount (the peripheral speed of the forming roller pair—the peripheral speed of the winding portion) increases, and the peripheral speed of the forming roller pair increases. The smaller the size, the smaller the predetermined amount (the peripheral speed of the forming roller pair-the peripheral speed of the winding section).

Since the slip between the forming roller pair and the belt-like body increases substantially in proportion to the peripheral speed of the forming roller pair, the peripheral speed of the forming roller pair can be changed as described above. Since the peripheral speed of the winding section is interlocked in accordance with the change in the slip caused by the above, the fluctuation of the pulling force applied to the band in the wedge-shaped gap by the winding section is suppressed, and the band is plastically deformed into a stable shape. can do.

According to the third aspect of the present invention, in the method of manufacturing a pair of spiral rollers of the forming roller according to the first aspect, when the type of the band is changed, a predetermined amount (the forming roller) is correspondingly changed. Since the peripheral speed of the roller pair-the peripheral speed of the winding portion) is changed by a predetermined amount, even if the slip of the band with respect to the formed roller pair changes due to the change in the type of the band (change in shape or material). As described above, since the peripheral speed of the winding unit is changed in advance in accordance with the above, it is possible to suppress the fluctuation of the pulling force applied to the band by the winding drum and the fluctuation of the plastic deformation shape of the band. it can.

According to a fourth aspect of the present invention, in the method of manufacturing a pair of spiral rollers according to any one of the first to third aspects, further, the outer peripheral surface of the pair of molded rollers is in contact with the belt-shaped body. A taper roller having a conical surface; and a cylindrical roller driven by a motor, which is disposed facing the taper roller with a wedge-shaped gap therebetween and driven by a motor. As the peripheral speed of the cylindrical roller is increased, the peripheral speed of the winding drum is reduced more greatly than the peripheral speed of the cylindrical roller. According to this configuration, by driving the cylindrical roller, it is possible to reduce the variation in the difference between the feed speed of the belt-shaped body and the peripheral speed of the cylindrical roller. And control can be improved.

According to a fifth aspect of the present invention, in the method of manufacturing a pair of spiral rollers of the forming roller according to the fourth aspect of the present invention, further, the method is directly proportional to a change in the peripheral speed of the winding drum or the peripheral speed of the cylindrical roller. Since the ratio between the peripheral speed of the take-up drum and the peripheral speed of the cylindrical roller is changed, the same operation and effect as in the second aspect can be obtained.

According to a sixth aspect of the present invention, in the method for manufacturing a pair of spiral rollers of the forming roller according to the first aspect, the forming roller is further driven at a predetermined number of revolutions and the winding drum is driven at a constant torque. (Variable rotation speed), so that the belt is always fixed at the wedge-shaped gap between the pair of forming rollers regardless of the peripheral speed of the winding drum, the peripheral speed, and the type of the belt. Can be applied, and the influence of the variation of the axial component of the tensile force on the plastic deformation of the belt-like body can be reduced. Can be made.

In order to solve the above problem, in the spiral wheel plate manufacturing apparatus according to the present invention, a driving roller of a pair of forming rollers (a forming roller driven by a motor) and a winding drum are provided. A roller drive motor which is separately arranged so as to be able to control the rotation speed (including torque control) and drives these drive rollers;
A drum driving motor for driving the winding drum is controlled such that the peripheral speed of the winding drum is delayed by a predetermined amount from the peripheral speed of the driving roller. In this specification, the peripheral speed of the pair of forming rollers refers to the peripheral speed of the driving roller.

According to this structure, a spiral wheel plate manufacturing apparatus capable of maintaining high precision plastic deformation working of the belt-like body despite the change in the number of revolutions of the forming roller and the kind of the belt-like body is realized. can do.

The details will be described below.

The present inventors have found that when plastically deforming a band using a pair of forming rollers, slipping usually occurs between the outer peripheral surface of the driving roller and the band, and therefore, the winding is simply performed. If the machining is performed with the peripheral speed of the take-up drum being equal to the peripheral speed of the drive roller, the take-up drum must be driven extremely strongly by the motor by an amount that does not allow the slippage (the delay speed). Was found. In this case, the pulling force of the take-up drum strongly acts on the belt-shaped body undergoing plastic deformation processing in the wedge-shaped gap between the pair of forming rollers. In this case, there is a problem that the belt-like body undergoing plastic deformation processing is affected and the plastic curvature becomes uneven.

More specifically, the pulling force of the winding drum has a component component acting in the axial direction on the band in the wedge-shaped gap between the pair of forming rollers, and as a result, the pulling force of the winding drum Changes the position of the strip in the axial direction (of the pair of forming rollers), thereby changing the width of the wedge-shaped gap at the position of the strip corresponding to the thickness of the strip after plastic deformation. If the winding drum pulls the band in a direction perpendicular to the axis of the forming roller pair, the above component force is eliminated, but the band coming out of the wedge-shaped gap is curved at a predetermined curvature toward one side of the band. For this reason, it has to be pulled in a substantially tangential direction.

In order to solve this problem, the peripheral speed of the winding drum is reduced by the amount of the slip, and the pulling force of the winding drum acting on the band being plastically deformed between the pair of forming rollers is reduced. It is possible to mitigate the effect of component force,
In this method, the peripheral speed of the pair of forming rollers must be reduced in synchronization, which causes a problem that productivity is reduced.

Therefore, in the spiral wheel manufacturing apparatus of the present invention,
The drum drive motor and the roller drive are so controlled that the peripheral speed of the winding portion of the winding drum is always smaller than the peripheral speed of the forming roller pair by a constant amount or a constant ratio in view of the slippage. Since the configuration for controlling the number of rotations or the torque of the motor is employed, the influence of the pulling force of the winding portion on the plastic deformation of the strip can be reduced.

According to an eighth aspect of the present invention, in the spiral wheel plate manufacturing apparatus according to the seventh aspect, the optimum relationship between the rotation values of both motors is further stored, and one of the rotation values of both motors is stored. When changing the rotation speed, the other rotation value is automatically changed based on the above relationship, so that the rotation value of the forming roller can be easily changed without changing the processing quality or the type of the band to be processed can be changed. Can be changed.

According to a ninth aspect of the present invention, in the helical wheel plate manufacturing apparatus according to the eighth aspect, the relationship is that the peripheral speed of the winding drum is positively correlated with the peripheral speed of the pair of forming rollers. Or the amount of delay of the peripheral speed of the winding drum with respect to the peripheral speed of the forming roller (i.e., the difference in peripheral speed).
It is characterized in that the relationship has a positive correlation with the peripheral speed of the pair.

The slip between the forming roller pair and the strip has a positive correlation with the peripheral speed of the forming roller pair. Since the peripheral speed of the winding unit is interlocked in accordance with the change in the slip, the fluctuation of the tensile force applied to the band in the wedge-shaped gap by the winding unit is suppressed, and the band is plastically deformed into a stable shape. be able to.

According to a tenth aspect of the present invention, in the helical wheel plate manufacturing apparatus according to the eighth aspect, the relationship is further provided by a forming roller.
The delay amount or the ratio of the peripheral speed of the winding drum to the peripheral speed of the roller is substantially directly proportional to the peripheral speed of the forming roller pair.

Since the slip (the amount of delay) or the delay ratio (peripheral speed ratio) between the forming roller pair and the belt-like body is substantially directly proportional to the peripheral speed of the forming roller pair, the wedge-shaped portion formed by the winding portion is used. It is possible to plastically deform the band into a stable shape by suppressing the fluctuation of the tensile force applied to the band in the gap.

According to the eleventh aspect of the present invention, in the spiral wheel plate manufacturing apparatus according to the seventh aspect, the roller driving motor is driven at a constant speed, and the drum driving motor is driven at a constant torque.
Of course, the rotation value of the roller drive motor and the torque value of the drum drive motor can be changed or switched.

In this way, regardless of the peripheral speed of the winding drum, the peripheral speed, and the type of the band, a constant tensile force is always applied to the band in the wedge-shaped gap between the pair of forming rollers. It is possible to reduce the influence of the variation in the axial component of the tensile force on the plastic deformation of the belt-like body, and to produce a spiral plate having a constant shape regardless of the above various changes and variations. it can.

According to the configuration of claim 12, according to claim 11,
Further, in the spiral wheel manufacturing apparatus described above, the control device stores a relationship between a rotation value of the roller driving motor and a preferable torque value of the drum driving motor, and When the rotation value is changed, the torque value of the drum drive motor is automatically changed based on the stored data. Therefore, the simple control allows the rotation of the forming roller and the type of the belt to be performed regardless of the type of the belt. Can be realized, which can maintain the plastic deformation working accuracy of the spiral plate more highly.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for manufacturing a spiral roller plate and a method for manufacturing a stator core of a rotary electric machine using the apparatus for manufacturing a spiral wheel plate according to the present invention will be described below with reference to the drawings.

[0038]

FIG. 1 is a schematic perspective view of a manufacturing apparatus for realizing the manufacturing method of the present invention, FIG. 2 is a schematic front view showing the operation thereof, and FIG. (Structure) In FIG. 1, reference numeral 1 denotes a molded roller pair, 2 denotes a belt-shaped body, and the molded roller pair 1 comprises a cylindrical roller 3 and a taper roller 4. As shown in FIG. 3, the band-shaped body 2 has cutouts 2 a provided at one end in a longitudinal direction at regular intervals.
Having a slot 2b at a constant pitch at the other end,
It is formed by punching an electromagnetic steel strip.

The rollers 3, 4 forming the forming roller pair 1 are arranged vertically, and the axes of the rollers 3, 4 are set horizontally at the same position in the vertical direction. The cylindrical roller 3 is rotatably supported by a support frame 17a erected on a base 17 described later, and the taper roller 4 is fixed to a driving end of a slide unit 7 described later through a bearing. A frusto-conical surface 41 is provided on the outer peripheral surface of the tip of the taper roller 4, and this frusto-conical surface 41 faces the outer peripheral surface of the cylindrical roller 3 with a wedge-shaped gap g interposed therebetween. The band 2 is sandwiched between the wedge-shaped gaps g.

Reference numeral 5 denotes a table portion 17b of the support frame 17a.
A roller driving motor fixed above and coupled to the cylindrical roller 3 through a torque transmission / reduction mechanism 6, and 7 is a taper motor.
This is a slide unit (up and down guide mechanism) for guiding a bearing (not shown) of the roller 4 so as to be able to move up and down (toward the columnar roller 3).

Reference numeral 8 denotes a tapered roller which is fixed to a support frame 17a to advance and retreat with respect to the cylindrical roller 3 via a slide unit 7, and the belt-shaped member 2
Is a linear actuator that applies a pressing force (plastic deformation force) to the linear actuator.

Reference numeral 9 denotes a take-up drum which is located on the left front side of the axis of the rollers 3, 4 and whose axis is vertically arranged, and is rotatable from the table portion 17b of the support frame 17a. Hanged on. The take-up drum 9 has a table 17
b, and is driven by a drum drive motor 18 fixed thereon. The winding drum 9 is wound with a belt-shaped body formed in a curved shape, that is, the spiral wheel plate 2. A guide plate 10 is provided on the outer peripheral surface of the winding drum 9 at a predetermined angle in the circumferential direction so as to protrude in the axial direction. The guide plate 10 is formed on the inner peripheral surface of the belt-shaped body, that is, the spiral wheel plate 2 in advance. By fitting into the slots 2b formed, the slots 2b of each turn of the spiral wheel plate 2 are aligned in the circumferential direction, and the spiral wheel plate 2 is wound up with a predetermined torque to reduce this torque. -It is given to the strip 2 at the site of the pair 1.

Reference numeral 12 denotes a guide for feeding the belt-shaped body 2 before being plastically deformed by the forming roller pair 1 into a predetermined position of the wedge-shaped gap g of the forming roller pair 1.

Numeral 13 denotes a flanged drum which is rotatably and vertically movable on a discharge slider 16 provided on a base 17 so as to be movable in the left-right direction. In the above, the upper end surface of the flanged drum 13 is coaxially disposed directly below the winding drum 9 and the upper end surface of the flanged drum 13 cannot be rotated relative to the lower end surface of the winding drum 9, and is rotated together with the winding drum 9 by the drum drive motor 18. Have been. That is, the opposing end surfaces of both drums 9 and 13 have fitting portions (for example, pin connection or key connection) for fitting each other. The spiral wheel plates 2 wound by the winding drum 9 fall on the flange of the flanged drum 13 by their own weight, and are stacked in a cylindrical shape. A guide plate 14 is also provided on the outer peripheral surface of the flanged drum 13 so as to protrude in the axial direction at a predetermined distance from each other in the circumferential direction. At the same time, the final circumferential alignment of the slots 2b of each turn of the spiral wheel plate 2 is performed.

Reference numeral 15 denotes a cutting mechanism which is suspended from the table 17b so as to be able to advance and retreat in the left-right direction. The cutting mechanism 15 approaches the winding drum 9 after the winding of the winding drum 9 is completed. The belt-shaped body wound around the take-up drum 9, that is, the spiral wheel plate 2 is cut at a predetermined position. (Operation) Next, the operation of the above-described manufacturing apparatus will be described.

First, it is assumed that the flanged drum 13 is fitted to the winding drum 9 so as to be integrally rotatable as shown in FIG.

The cylindrical roller 3 and the take-up drum 9 are respectively rotated at a predetermined number of revolutions, and the tape roller 4 is pressed against the cylindrical roller 3 with a predetermined pressing force via the band 2 having the wedge-shaped gap g. As a result, the belt-shaped body 2 having the wedge-shaped gap g is curved and deformed toward the winding drum 9 to form the spiral wheel plate 2.
The spiral wheel plate 2 is wound on a winding drum 9, falls by its own weight, and is stacked around a flanged drum 13. After the plastic deformation of a predetermined length and the simultaneous winding thereof have been completed, the spiral wheel plate 2 is cut by the cutting mechanism 15.

Next, the flanged drum 13 is lowered to release the engagement with the winding drum 9, and then the discharge slider 16 is moved to the left so that the cylindrical core composed of the laminated spiral wheel plate is moved from the flanged drum 13. Take out. (Rotation control) Next, the rotation control of the roller drive motor 5 for driving the cylindrical roller 3 and the drum drive motor 18 for driving the winding drum 9 will be described.

The speed of the belt 2 before and after the forming roller pair 1 (hereinafter also referred to as the belt feeding speed) is equal to the peripheral speed vd of the winding portion of the winding drum 9 and 2π · the winding speed of the winding portion. The radius rd is equal to the rotation number nd of the winding unit. Cylinder b
The peripheral speed vr of the roller 3 is 2π · the radius rr of the cylindrical roller 3 · the rotational speed nr of the cylindrical roller 3.

In the wedge-shaped gap g, the belt-like body 2 is
A slip S (= (vr−vd) / vr) is generated with respect to the roller 3, and the slip S increases as the peripheral speed vr of the cylindrical roller 3 increases.

Therefore, the slip S is determined by the peripheral speed vr of the cylindrical roller 3.
S = k · vr. k is a proportionality constant.

From the above equations, it is possible to calculate a suitable rotation speed of the winding drum 9 when the rotation speed nr of the cylindrical roller 3 is changed for the same band 2. That is, the optimum peripheral speed vd of the winding drum 9 is S = (v
From r−vd) / vr = k · vr, vd = −k · vr ·
vr + vr.

When the slip S is assumed to be constant, the optimum peripheral speed vd of the winding drum 9 is S = (vr
From −vd) / vr = k, vd = −k · vr + vr =
It becomes the solution of (1-k) vr.

Cylinder roller 3 for reasons such as improvement in productivity
If the rotation speed of the winding drum 9 is controlled in accordance with the above equation when the rotation speed of the winding drum 9 is changed, an excessive load is applied to the winding drum 9, or the winding drum 9 and the forming roller pair 1 Without the band 2 becoming loose,
Further, the winding drum 9 is moved through the band 2 to form a wedge-shaped gap g.
Thus, the variation in the tensile force applied to the belt-like body 2 can be reduced, and the variation in the shape of the plastic deformation processing can be suppressed.

In addition to the change in the number of rotations of the cylindrical roller 3, the change in the type of the band 2, the change in the slip S which occurs in response to the change in the winding S 9.
Can be changed. Examples of changes in the type of the band 2 include a change in its cross-sectional shape and a change in its composition.

Conversely, when the rotation speed of the winding drum 9 is changed, the rotation speed of the cylindrical roller 3 may be changed according to the above equation.

According to the experiments of the present inventors, the thickness was 0.3 m
m, the slip S was about 0.02 in the range of 0 to 32.4 cm / sec in the feed rate of the electromagnetic steel strip having a width of 14.3 mm.

FIG. 4 shows a control example of the control device 100.

The motors 5 and 18 are brushless DC motors driven by an inverter, and the rotation value can be changed by controlling the output frequency of the inverter.

First, it is checked whether or not a change in the rotational speed command value N1 of the roller drive motor 5 has been input from outside (S1).
00), if not input, the conventional rotational speed command value N
The motors 5 and 18 are driven by 1 and N2 (S106).
In this driving state, the peripheral speed of the winding portion of the winding drum 9 is set to be smaller than the peripheral speed of the cylindrical roller 3 by a predetermined amount.

When a change in the rotational speed command value N1 of the roller drive motor 5 is input from outside, this rotational speed is stored in a built-in map which stores a preferable relationship between the rotational speeds of the two motors. Substituting the command value N1, the rotation speed command value N2 of the drum drive motor 18 is read out (S102), and these rotation speed command values N
1 and N2 are stored in a register (S104), and both motors 5 and 18 are driven and controlled by these rotational speed command values N1 and N2.

In this way, good molding can be performed for the reasons described above.

(Modification) In the above embodiment, the cylindrical roller 3 is used.
However, the taper roller 4 may be driven by a motor.

Instead of the pair of the cylindrical roller 3 and the tape roller 4, a pair of tape rollers 4 may be used to form the molded roller pair 1. Also, the microcomputer 100 shown in FIG. 1 stores the relationship between the number of rotations of the cylindrical roller 3 and the number of rotations of the take-up drum 9 previously obtained by implementation or the like. The motor speed control may be performed based on the relationship.

[0065]

Embodiment 2 Another embodiment will be described below.

In the above embodiment, the motors 5 and 18 are respectively determined in advance. In this embodiment, however, the rotation speed of the cylindrical roller 3 is maintained at a constant value, and the winding drum 9 is rotated. Is operated at a constant torque. The motors 5 and 18 are brushless DC motors driven by an inverter, and the roller driving motor 5 can change the rotation value by controlling the output frequency of the inverter. The drum drive motor 18 is a motor control device capable of controlling torque by vector control or the like.

FIG. 5 shows a control example of the control device 100.

First, it is checked whether or not a change in the rotational speed command value N1 of the roller drive motor 5 has been input from outside (S2).
00), if it has not been input, the drive control of the roller drive motor 5 is performed with the conventional rotational speed command value N1, and the drive control of the drum drive motor 18 is controlled with the conventional torque command value T2 (S).
206). In this driving state, the winding drum 9
The peripheral speed of the winding portion is set smaller than the peripheral speed of the cylindrical roller 3 by a predetermined amount.

When a change in the rotation speed command value N1 of the roller drive motor 5 is input from outside, the rotation speed command value N1 of the roller drive motor 5 and the drum drive motor 18 are changed. The torque command value T2 of the drum drive motor 18 is read by substituting the rotation speed command value N1 into a built-in map that stores a preferable relationship with the torque command value T2 (S202). The torque command value T2 and the torque command value T2 are stored in a register (S204), and the motors 5 and 18 are drive-controlled by the rotation speed command value N1 and the torque command value T2.

In this way, regardless of the change in the rotational speed of the cylindrical roller 3, the pulling force acting from the winding drum 9 on the band 2 in the wedge-shaped gap g of the forming roller pair 1 is always constant. Therefore, the axial force of the strip 2 in the wedge-shaped gap g of the pulling force is always constant, and the probability of bending formed by plastic deformation can be made constant with high accuracy.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an apparatus for manufacturing a pair of spiral rollers in a forming roller according to a first embodiment of the present invention.

FIG. 2 is a schematic partial front view showing a main part of the manufacturing apparatus of FIG.

FIG. 3 is a partial plan view of the belt-shaped body.

FIG. 4 is a flowchart showing an example of a control operation of both motors.

FIG. 5 is a flowchart showing another example of the control operation of both motors.

[Explanation of symbols]

1 is a molded roller pair, 2 is a belt-shaped body, 3 is a cylindrical roller (part of the molded roller pair), 1, 4 is a taper roller (the rest of the molded roller pair), 5 is Roller drive motor, 9 is a take-up drum, 18 is a drum drive motor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsumi Matsumoto, Inventor 1-1-1, Showa-cho, Kariya-shi, Aichi Pref. F term (reference) 5H615 AA01 BB14 PP01 PP02 PP06 PP11 SS03 SS10 TT04

Claims (12)

[Claims] 1. A belt-shaped body thicker than said wedge-shaped gap is continuously inserted into a plastic deformation wedge-shaped gap formed between the outer peripheral surfaces of a pair of forming rollers and gradually increasing to one side in the axial direction. A band bending step of bending the band toward one side of the band; and a winding drum having an axis extending substantially perpendicular to the axis of the pair of forming rollers. A winding-up process of winding the curved band-shaped body that has come out of the pair of forming rollers onto the winding drum by rotating in a lateral direction. In the manufacturing method, the peripheral speed of the winding portion of the winding drum is set to a value smaller than the peripheral speed of the forming roller pair by a predetermined amount, and the forming roller pair-type spiral wheel plate is provided. Production method. 2. The method according to claim 1, wherein when the peripheral speed of the pair of forming rollers is changed, the predetermined amount is changed by a predetermined amount. A method for producing a pair of spiral rollers, wherein the speed is changed based on a relationship having a positive correlation with speed. 3. The method according to claim 1, wherein said predetermined amount is changed when the kind of said strip is changed. -Type spiral wheel plate manufacturing method. 4. The method of manufacturing a pair of spiral rollers according to claim 1, wherein the outer peripheral surface of the pair of molded rollers, which is in contact with the strip, is a conical surface. A roller and a roller driven by a motor which is disposed opposite to the tape roller with the wedge-shaped gap interposed therebetween and driven by a motor. The peripheral speed of the winding drum and the cylindrical roller A method of manufacturing a spiral roller plate with a pair of formed rollers, wherein the peripheral speed of the winding drum is reduced more greatly than the peripheral speed of the cylindrical roller as the peripheral speed of the roller is increased. 5. The method according to claim 4, wherein the winding speed of the winding drum is directly proportional to a change in the peripheral speed of the winding drum or the peripheral speed of the cylindrical roller. A method of manufacturing a pair of spiral rollers, wherein a ratio between a peripheral speed and a peripheral speed of the cylindrical roller is changed. 6. A method according to claim 1, wherein the forming roller is driven at a constant speed, and the winding drum is driven at a constant torque. -A method of manufacturing a spiral spiral plate. 7. A pair of forming rollers arranged facing each other with a wedge-shaped gap for plastic deformation gradually increasing to one side in the axial direction, and at least one of the pair of forming rollers is driven to drive the forming roller. A roller driving motor for bending and deforming the band in the wedge-shaped gap by a pair of rollers; and a winder disposed on the band discharging side of the pair of formed rollers to wind the deformed band. A drum driving motor for driving the winding drum; and a forming roller so that a peripheral speed of the winding drum is delayed by the predetermined amount with respect to a peripheral speed of the forming roller. −
And a controller for controlling a rotation value of the winding drum or a torque value of the winding drum. 8. The spiral wheel manufacturing apparatus according to claim 7, wherein the control device stores an optimum relationship between the rotation values of the two motors and stores one of the rotation values of the two motors. A spiral wheel plate manufacturing apparatus characterized in that when changing, the other rotation value is automatically changed based on the storage. 9. The apparatus for manufacturing a spiral wheel plate according to claim 8, wherein said relationship is that the peripheral speed of said winding drum is equal to said forming roller.
Relationship having a positive correlation with the peripheral speed of the pair of rollers, or the amount of delay of the peripheral speed of the winding drum with respect to the peripheral speed of the forming roller is positively correlated with the peripheral speed of the pair of forming rollers. A spiral wheel plate manufacturing apparatus characterized by having a relationship of: 10. The spiral wheel plate manufacturing apparatus according to claim 8, wherein the relationship is that a delay amount or a ratio of a peripheral speed of the winding drum to a peripheral speed of the forming roller is equal to or smaller than a peripheral speed of the forming roller pair. A spiral wheel manufacturing apparatus characterized by being substantially directly proportional to the peripheral speed. 11. The spiral wheel manufacturing apparatus according to claim 7, wherein the control device controls the drive of the roller drive motor at a predetermined rotation value, and controls the drum drive motor to the rotor. A spiral wheel plate manufacturing apparatus, comprising: a control device for controlling the drive of a rotary drive motor at a predetermined torque value corresponding to the rotation value, wherein the rotation value and the torque value can be changed. 12. The spiral wheel manufacturing apparatus according to claim 11, wherein the control device stores a relationship between a rotation value of the roller drive motor and a suitable torque value of the drum drive motor. A spiral wheel plate manufacturing apparatus, wherein when changing the rotation value of the roller drive motor, the torque value of the drum drive motor is automatically changed based on the storage.