Wire rod feeding device

Abstract

To suppress looseness of a wire bundle of a reel due to a change of wire feed speed in a wire processor, a supply speed shortage of the wire with respect to the wire processor, and deformation of a wire cross-sectional shape.SOLUTION: An information acquisition part 190 acquires information about feed speed of wire 300 in a wire processor 200. A feed control part 163 controls speed of rotation of a feed roll 120 with a control amount determined by the feed control part 163 on the basis of the acquired information. This control causes the feed roll 120 to make a feed speed of the wire 300 by the feed roll 120 follow feed speed of the wire 300 in the wire processor 200. The reel control part 153 controls a speed of rotation of a reel 110 so as to correspond to a diameter of the wire bundle 310. A feed side movable roll 130 contacts a feed side wire part 320 between the reel 110 and the feed roll 120, and is displaced as a slack quantity of the feed side wire part 320 changes.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wire feeding device. [Background technology]

[0002] The wire rod feeding device feeds the reeled wire rod to the wire rod processing device. In the wire rod processing device, the feeding of the wire rod to the processing section is intermittently stopped according to the progress of the processing step of the wire rod in the processing section. If the wire rod feeding device stops the feeding of the wire rod following the wire rod processing device, the winding of the wire rod bundle loosens while the reel rotates for a while by inertia after the feeding is stopped, and the wire rod becomes sagging around the reel.

[0003] Patent Document 1 describes a technique for controlling the rotational speed of a reel to make the feed speed of the wire unwound from the reel follow the feed speed of the wire to the processing section of a wire processing device. In this technique, the wire fed from the reel to the wire processing device is looped on a movable roller between two fixed position rollers. The amount of change in the loop length of the wire due to the difference in feed speed between the reel and the wire processing device is calculated, and the rotational speed of the reel is controlled according to the diameter of the wire bundle on the reel estimated taking into account this amount of change. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4044409 Summary of the Invention [Problem to be solved by the invention]

[0005] In the technology described in Patent Document 1, the change in the wire feed speed in the wire processing device is alleviated by changing the loop length of the wire, and the tracking ability of the feed speed of the wire fed by the reel to the feed speed of the wire processing device is reduced. Therefore, when the wire processing device suddenly increases the feed speed, the reel side, which has low tracking ability, may not be able to keep up with the increase in the wire feed speed. If the reel side cannot keep up with the increase in the wire feed speed in the wire processing device, excessive tension is applied to the wire supplied to the wire processing device.

[0006] When excessive tension is applied to the wire fed to the wire processing device, if the nipping force of the feed rollers that feed the wire to the processing section of the wire processing device is low, the feed rollers rotate faster than the feed speed of the wire and spin idle. This idle rotation makes it impossible for the feed rollers to feed the wire to the processing section at the required speed. If the nipping force of the feed rollers is increased to avoid idle rotation, the cross-sectional shape of the wire will be deformed by the nipping force, and unevenness that does not exist in the surface of the product processed from the wire will appear. [Means for solving the problem]

[0007] A wire rod feeding device according to one aspect of the present invention comprises: a feed roll for feeding the wire rod along a feed path of the wire rod unwound from the wire rod bundle on the reel to a wire rod processing device; a feed-side movable roll that is stretched over a feed-side wire portion of the wire rod in the supply path between the reel and the feed roll and that is displaced in response to a change in a slack amount of the feed-side wire portion to maintain contact with the feed-side wire portion; an information acquiring unit that acquires information on a feed speed of the wire in the wire processing device; a feed control amount determination unit that determines a control amount of a rotation speed of the feed roll based on the information so that a feed speed of the wire rod by the feed roll follows a feed speed of the wire rod in the wire processing device; a feed control unit that controls the rotation speed of the feed roll with the control amount determined by the feed control amount determination unit; a reel control unit that controls the rotation speed of the reel to a faster speed as the diameter of the wire bundle becomes shorter; a feed-side movable roll that is stretched over a feed-side wire portion of the wire in the supply path between the feed roll and the wire processing device and that is displaced in response to a change in a slack amount of the feed-side wire portion to maintain contact with the feed-side wire portion; Equipped with 、 The feed-side movable roll is displaceable within a larger range than the feed-side movable roll, The feed control amount determination unit determines a control amount of the rotation speed of the feed roll based on a displacement amount of the feed side movable roll. do.

[0008] In a wire rod feeding device according to one embodiment of the present invention, a feed roll between the reel and the wire rod processing device feeds the wire rod unwound from the reel to the wire rod processing device in accordance with the feed speed of the wire rod in the wire rod processing device. Therefore, the feed roll can feed the wire rod at a speed required for the wire rod processing device. The reel rotates at a faster speed under the control of the reel control unit as the diameter of the wire rod bundle on the reel becomes shorter. Therefore, the reel unwinds the wire rod of the wire rod bundle to the feed roll at a constant unwind speed.

[0009] A difference in the wire feed speed occurs between the reel that pays out the wire at a constant speed and the feed roll that follows the wire processing device and pays out the wire. This speed difference is absorbed by increasing or decreasing the amount of slack in the wire portion on the payout side between the reel and the feed roll that is hung on the payout side movable roll between the reel and the feed roll. Even if the wire feed speed by the feed roll fluctuates in response to the wire feed speed in the wire processing device, the speed fluctuation is transmitted, and fluctuations in the payout speed of the wire from the reel are suppressed. Effect of the Invention

[0010] According to one embodiment of the wire feeding device of the present invention, it is possible to comprehensively suppress slackening of the wire bundle on the reel, insufficient supply speed of the wire to the wire processing device, and deformation of the cross-sectional shape of the wire, which are caused by changes in the wire feed speed in the wire processing device. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is an explanatory diagram showing a feed path of a wire rod fed to a processing machine by a wire rod feeding device according to an embodiment of the present invention. [Figure 2A]FIG. 2A is a block diagram showing a drive unit of the reel of FIG. [Figure 2B] FIG. 2B is a block diagram showing a drive unit for the feed roll of FIG. [Figure 2C] 2C is a block diagram showing roll position detection units of the first dancer roll and the second dancer roll of FIG. 1. FIG. [Figure 2D] FIG. 2D is a block diagram showing the speed detection unit of the master roll of FIG. [Diagram 3] FIG. 3 is a flowchart showing a procedure of processing executed in the wire rod feeding device of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same or equivalent parts or components are designated by the same reference numerals throughout the drawings.

[0013] The following embodiments are examples of devices and the like for embodying the technical idea of ​​the present invention. The technical idea of ​​the present invention does not limit the material, shape, structure, arrangement, function, etc. of each component to those described below.

[0014] Fig. 1 is an explanatory diagram showing a feed path of a wire rod fed to a processing machine by a wire rod feeding device according to an embodiment of the present invention. The wire rod feeding device 100 of the present embodiment shown in Fig. 1 includes a feed roll 120, a payout side movable roll 130, an information acquisition unit 190, a feed control amount determination unit 163, a feed control unit 163, and a reel control unit 153.

[0015] The feed roll 120 feeds the wire 300, which is unwound from the wire bundle 310 on the reel 110, along a supply path to the wire processing device 200. The unwinding side movable roll 130 is stretched over an unwinding side wire portion 320 between the reel 110 and the feed roll 120 of the wire 300 in the supply path, and is displaced due to slack in the unwinding side wire portion 320 to maintain contact with the unwinding side wire portion 320. The information acquiring unit 190 acquires information on the feed speed of the wire 300 in the wire processing device 200.

[0016] The feed control unit 163 determines a control amount of the rotation speed of the feed roll 120 so that the feed speed of the wire 300 by the feed roll 120 follows the feed speed of the wire 300 in the wire processing device 200, based on the information acquired by the information acquisition unit 190. The feed control unit 163 controls the rotation speed of the feed roll 120 with the control amount determined by the feed control amount determination unit 163. The reel control unit 153 controls the rotation speed of the reel 110 to a speed corresponding to the diameter of the wire bundle 310.

[0017] The wire rod feeding device 100 will be described in detail below. The wire rod feeding device 100 feeds the wire rod 300 to a master roll 210 of a processing machine 200, which is a wire processing device. The wire rod feeding device 100 has a reel 110, a feed roll 120, a first dancer roll 130, and a second dancer roll 140. In the wire rod feeding device 100, the feed roll 120 feeds the wire rod 300 nipped between a pair of rolls to the master roll 210 in a supply path to the processing machine 200 of the wire rod 300 unwound from the wire rod bundle 310 wound around the reel 110. The master roll 210 feeds the wire rod 300 nipped between the pair of rolls into the inside of the processing machine 200 at a speed according to the processing content by the processing machine 200.

[0018] On the transport path of the wire 300 between the reel 110 and the feed roll 120, the unwinding wire portion 320 of the wire 300 located between them is slackened. The unwinding wire portion 320 is stretched over a first dancer roll 130 (unwinding movable roll). The first dancer roll 130 is displaced according to a change in the amount of slack in the unwinding wire portion 320, and constantly maintains contact with the unwinding wire portion 320. The displacement direction of the first dancer roll 130 may be, for example, a direction including a component in the direction of gravity. The first dancer roll 130 constantly maintains contact with the unwinding wire portion 320, thereby constantly applying a constant amount of tension to the unwinding wire portion 320.

[0019] On the transport path of the wire 300 between the feed roll 120 and the master roll 210, the feed side wire portion 330 of the wire 300 located therebetween is made to have less slack than the unwind side wire portion 320. The feed side wire portion 330 is stretched over a second dancer roll 140 (feed side movable roll). The second dancer roll 140 is displaced according to the change in the amount of slack of the feed side wire portion 330, and constantly maintains contact with the feed side wire portion 330. The displacement direction of the second dancer roll 140 may be, for example, a direction including a component in the direction of gravity. The second dancer roll 140 constantly maintains contact with the feed side wire portion 330, thereby constantly applying a constant amount of tension to the feed side wire portion 330.

[0020] Figure 2A is a block diagram showing a drive unit for the reel of Figure 1. Figure 2B is a block diagram showing a drive unit for the feed roll of Figure 1. Figure 2C is a block diagram showing a roll position detection unit for the first dancer roll and the second dancer roll of Figure 1. Figure 2D is a block diagram showing a speed detection unit for the master roll of Figure 1.

[0021] The wire feeding device 100 has drive units 150, 160 for the reel 110 and the feed roll 120, respectively, shown in Fig. 2A and Fig. 2B, and roll position detection units 170, 180 for the first dancer roll 130 and the second dancer roll 140, respectively, shown in Fig. 2C. The wire feeding device 100 further has a master speed detection unit 190 shown in Fig. 2D. The master speed detection unit 190 detects the transport speed of the wire 300 by the master roll 210 (hereinafter referred to as "master shaft speed").

[0022] 2A controls the rotation speed of the reel 110. The rotation speed of the reel 110 can be controlled based on the transport speed of the wire 300 by the feed roll 120 (hereinafter referred to as the "feed shaft speed") and the position of the first dancer roll 130 detected by the roll position detection unit 180. The feed shaft speed of the wire 300 is input to the drive unit 150 from the drive unit 160 of the feed roll 120.

[0023] 2B controls the rotation speed of the reel 110. The rotation speed of the reel 110 can be controlled based on the master shaft speed of the wire 300 detected by the master speed detection unit 190 and the position of the second dancer roll 140 detected by the roll position detection unit 170.

[0024] The master speed detection unit 190 of FIG. 2D is connected to a controller 220 of the processing machine 200 .

[0025] The controller 220 outputs drive pulses to the amplifier 221, the period of which corresponds to the master shaft speed. The amplifier 221 outputs a control signal corresponding to the input drive pulses to the motor 222, which rotates the master roll 210. The controller 220 controls the operation of the motor 222 based on the control signal output from the amplifier 221 to the motor 222. Under the control of the controller 220, the motor 222 can rotate at a speed at which the master roll 210 conveys the wire 300 at the master shaft speed. The motor 222 may output encoder pulses from a built-in gray code encoder unit (not shown), the period of which corresponds to the rotation direction and rotation speed of the drive shaft. The encoder pulses can be input to the master speed detection unit 190 via the amplifier 221.

[0026] Master speed detection unit 190 has a pulse speed input section 191, a unit conversion section 192, and a moving average filter section 193. Master speed detection unit 190 can be realized by using a microcomputer equipped with a CPU (Central Processing Unit), a memory, and an input / output section. Master speed detection unit 190 installs and executes a computer program in the microcomputer for causing the microcomputer to function as master speed detection unit 190. This allows the microcomputer to function as each section (191 to 193) of master speed detection unit 190.

[0027] Here, an example is shown in which each section (191 to 193) of the master speed detection unit 190 is realized by software. However, it is of course possible to configure the master speed detection unit 190 by providing dedicated hardware for executing the processing of each section. The dedicated hardware includes devices such as application specific integrated circuits (ASICs) and conventional circuit components arranged to perform the functions described in the embodiments.

[0028] A frequency-divided signal of the drive pulse output by the controller 220 to the amplifier 221 is input to the pulse speed input unit 191. Based on the frequency-divided signal, the pulse speed input unit 191 detects the number of pulses of the frequency-divided signal per unit time and outputs it to the unit conversion unit 192. The pulse speed input unit 191 may receive an encoder pulse signal from the amplifier 221, detect the number of pulses of the encoder pulse signal per unit time based on this encoder pulse signal, and output it to the unit conversion unit 192.

[0029] The unit conversion unit 192 calculates a base value of the master shaft speed each time the pulse speed input unit 191 detects the number of pulses per unit time. The unit conversion unit 192 calculates the base value of the master shaft speed based on the number of pulses detected by the pulse speed input unit 191, the angle by which the master roll 210 rotates per pulse (rotation resolution), and the diameter of the master roll 210.

[0030] The moving average filter section 193 calculates a moving average of the most recent multiple values ​​of the base value of the master shaft speed each time the unit conversion section 192 calculates the base value of the master shaft speed. The moving average filter section 193 outputs the calculated moving average value to the outside of the master speed detection unit 190 as a confirmed value of the master shaft speed.

[0031] 2C, the roll position detection units 170 and 180 may have a common configuration. The roll position detection unit 170 has a potentiometer 171 and a signal processing unit 172. The roll position detection unit 180 has a potentiometer 181 and a signal processing unit 182.

[0032] The potentiometer 171 outputs a signal corresponding to the position of the first dancer roller 130 in the displacement direction. The potentiometer 181 outputs a signal corresponding to the position of the second dancer roller 140 in the displacement direction. For example, the first dancer roller 130 and the second dancer roller 140 can be supported by swingable support arms 173, 183, respectively, and displaced in the displacement direction. Each potentiometer 171, 181 can output a signal corresponding to the swing angle of each support arm 173, 183, for example.

[0033] Signal processing unit 172 has an A / D conversion unit 174, a unit conversion unit 175, a moving average filter unit 176, and a deviation output unit 177. Signal processing unit 182 has an A / D conversion unit 184, a unit conversion unit 185, a moving average filter unit 186, and a deviation output unit 187.

[0034] Each of the signal processing units 172, 182 can be realized by using a microcomputer equipped with a CPU (Central Processing Unit), a memory, and an input / output unit. Each of the signal processing units 172, 182 installs and executes a computer program in the microcomputer for causing the microcomputer to function as each of the signal processing units 172, 182. This allows the microcomputer to function as each unit (174-177, 184-187) included in each of the signal processing units 172, 182.

[0035] Here, an example is shown in which each unit (174-177, 184-187) included in each of the signal processing units 172, 182 is realized by software. However, it is of course possible to prepare dedicated hardware for executing the processing of each unit and configure each of the signal processing units 172, 182. Dedicated hardware includes devices such as application specific integrated circuits (ASICs) and conventional circuit components arranged to execute the functions described in the embodiments.

[0036] The A / D conversion units 174, 184 respectively digitally convert the signals output by the potentiometers 171, 181 and output digital signals with a number of bits corresponding to the swing angles of the support arms 173, 183 to the unit conversion units 175, 185, respectively.

[0037] Each unit conversion section 175, 185 determines the current positions in the displacement directions of the first dancer roll 130 and the second dancer roll 140 for each predetermined sampling period, based on the number of bits of the digital signals input from each A / D conversion section 174, 184. The predetermined sampling period can be the period of the frequency-divided signal input to the pulse speed input section 191 of the master speed detection unit 190, for example.

[0038] The current positions of the first dancer roll 130 and the second dancer roll 140 can be represented, for example, by the swing angle of each support arm 173, 183. Each unit conversion unit 175, 185 can determine the swing angle of each support arm 173, 183 using the maximum and minimum angle values ​​of the swing range of each support arm 173, 183 and the number of bits of the digital signal output by each A / D conversion unit 174, 184 at those angle values.

[0039] Each moving average filter section 176, 186 calculates a moving average value of the current positions over the most recent multiple times each time each unit conversion section 175, 185 determines the current positions in the displacement direction of the first dancer roll 130 and the second dancer roll 140. Each moving average filter section 176, 186 outputs the calculated moving average value as a confirmed value of the current position in the displacement direction of the first dancer roll 130 and the second dancer roll 140. The sign of the confirmed value of the current position is reversed depending on whether the first dancer roll 130 and the second dancer roll 140 are located above or below the respective target positions in the direction of gravity.

[0040] Each deviation output section 177, 187 calculates the deviation between the target position and the current position in the displacement direction of the first dancer roll 130 and the second dancer roll 140. Each deviation output section 177, 187 outputs the calculated deviation values ​​of the first dancer roll 130 and the second dancer roll 140 to the outside of each roll position detection unit 170, 180, respectively.

[0041] As shown in FIG. 2B, the drive unit 160 of the feed roll 120 includes an amplifier 161, a motor 162, and a controller 163.

[0042] The controller 163 outputs a driving pulse having a period corresponding to the feed shaft speed to the amplifier 161. The amplifier 161 outputs a control signal corresponding to the input driving pulse to a motor 162 that rotates the feed roll 120. The controller 163 controls the operation of the motor 162 by the control signal output from the amplifier 161 to the motor 162. Under the control of the controller 163, the motor 162 can rotate at a speed at which the feed roll 120 transports the wire 300 at the feed shaft speed.

[0043] The controller 163 has a correction value calculation unit 164, a command speed setting unit 165, a filter unit 166, a parameter setting unit 167, and a speed command unit 168. The controller 163 can be realized by using a microcomputer equipped with a CPU (Central Processing Unit), a memory, and an input / output unit. The controller 163 installs and executes a computer program for causing the microcomputer to function as the controller 163. This causes the microcomputer to function as each unit (164 to 168) of the controller 163.

[0044] Here, an example is shown in which each unit (164 to 168) of the controller 163 is realized by software. However, it is of course possible to configure the controller 163 by providing dedicated hardware for executing the processing of each unit. The dedicated hardware includes devices such as application specific integrated circuits (ASICs) and conventional circuit components arranged to execute the functions described in the embodiments.

[0045] The deviation value of the second dancer roll 140 output by the deviation output section 187 of the roll position detection unit 180 is input to the correction value calculation section 164. The correction value calculation section 164 calculates a correction value for the feed shaft speed by, for example, PI (proportional integral) control from the input deviation value of the second dancer roll 140. The transfer function (gain) used by the correction value calculation section 164 for integral control is set to a value suitable for making the feed shaft speed follow the master shaft speed.

[0046] The determined value of the master shaft speed output by the moving average filter section 193 of the master speed detection unit 190 is input to the command speed setting section 165. The determined value of the master shaft speed may be replaced with a measured value of the actual feed speed of the wire rod 300 fed into the processing machine 200, measured upstream of the master roll 210. The command speed setting section 165 obtains a deviation between the determined value of the input master shaft speed and the correction value of the feed shaft speed calculated by the correction value calculation section 164 at every predetermined sampling period as a base value of the feed shaft speed. The predetermined sampling period may be, for example, the period of the frequency-divided signal input to the pulse speed input section 191 of the master speed detection unit 190, as in the case of the unit conversion sections 175, 185 of the roll position detection units 170, 180.

[0047] When motor 162 loses synchronism, filter unit 166 applies a filter to the base value of the feed axis speed calculated by command speed setting unit 165 to determine a final value of the feed axis speed, and outputs the determined final value. The final value of the feed axis speed output by filter unit 166 approaches the base value of the feed axis speed as the rotation speed of motor 162 increases. By filter unit 166 applying a filter to the base value of the feed axis speed to obtain a final value, motor 162 that has lost synchronism can be reliably restored to synchronism. When motor 162 is rotating normally without losing synchronism, filter unit 166 outputs the base value of the feed axis speed as the final value without any change.

[0048] The parameter setting unit 167 sets parameters necessary for the speed command unit 168 to generate a drive pulse having a period corresponding to the determined value of the feed axis speed. The parameter setting unit 167 can set, for example, the diameter of the feed roll 120, the feed speed of the wire 300 by the rotation of the feed roll 120, the feed amount of the wire 300 per one rotation of the feed roll 120, etc. as parameters.

[0049] Based on the determined value of the feed axis speed output by the filter unit 166, the speed command unit 168 uses the parameters set by the parameter setting unit 167 to generate a drive pulse having a period corresponding to the determined value of the feed axis speed, and outputs the drive pulse to the amplifier 161.

[0050] As shown in FIG. 2A, the drive unit 150 of the reel 110 includes an amplifier 151, a motor unit 152, and a controller 153.

[0051] The controller 153 outputs to the amplifier 151 a drive pulse having a period corresponding to the unwinding speed of the wire 300 from the reel 110. The amplifier 151 outputs a control signal corresponding to the input drive pulse to the motor unit 152. The motor unit 152 has a motor 152a that is rotated by the control signal from the amplifier 151, and a speed reduction mechanism 152b that reduces the rotation of the motor 152a and transmits it to the reel 110. The controller 153 controls the operation of the motor unit 152 by the control signal output from the amplifier 151 to the motor unit 152. Under the control of the controller 153, the motor 152a of the motor unit 152 can rotate at a speed at which the reel 110 unwinds the wire 300 at the unwinding speed.

[0052] The controller 153 has a correction value calculation unit 154, a command speed setting unit 155, a filter unit 156, a diameter correction calculation unit 157, a parameter setting unit 158, and a speed command unit 159. The controller 153 can be realized by using a microcomputer equipped with a CPU (Central Processing Unit), a memory, and an input / output unit. The controller 153 installs and executes a computer program for causing the microcomputer to function as the controller 153. This causes the microcomputer to function as each unit (154 to 159) of the controller 153.

[0053] Here, an example is shown in which each unit (154 to 159) of the controller 153 is realized by software. However, it is of course possible to configure the controller 153 by providing dedicated hardware for executing the processing of each unit. The dedicated hardware includes devices such as application specific integrated circuits (ASICs) and conventional circuit components arranged to execute the functions described in the embodiments.

[0054] The deviation value of the first dancer roll 130 output by the deviation output section 177 of the roll position detection unit 170 is input to the correction value calculation section 154. From the input deviation value of the first dancer roll 130, the correction value calculation section 154 calculates a correction value for the payout speed of the wire rod 300 by, for example, PI (proportional integral) control. The transfer function (gain) used by the correction value calculation section 154 for integral control is set to a value suitable for keeping the payout speed of the wire rod 300 from the reel 110 constant even if the master axis speed or the feed axis speed fluctuates.

[0055] The determined value of the feed shaft speed output by the filter section 166 of the drive unit 160 of the feed roll 120 is input to the command speed setting section 155. The command speed setting section 155 obtains a deviation between the input determined value of the feed shaft speed and the correction value of the payout speed of the wire rod 300 calculated by the correction value calculation section 154 at every predetermined sampling period as a base value of the payout speed. The predetermined sampling period can be, for example, the period of the frequency-divided signal input to the pulse speed input section 191 of the master speed detection unit 190, like the unit conversion sections 175, 185 of the roll position detection units 170, 180.

[0056] The filter unit 156 filters the base value of the unwinding speed calculated by the command speed setting unit 155 to determine a final value of the unwinding speed, and outputs the determined final value. The final value of the unwinding speed output by the filter unit 156 is closer to the current unwinding speed than the base value of the unwinding speed. By the filter unit 156 filtering the base value of the unwinding speed to determine the final value, large fluctuations in the unwinding speed of the wire 300 from the reel 110 are suppressed.

[0057] The diameter correction calculation unit 157 calculates the diameter of the wire bundle 310 wound on the reel 110. If the wire 300 continues to be unwound from the outermost periphery of the wire bundle 310 on the reel 110, the diameter of the wire bundle 310 gradually becomes shorter. If the diameter of the wire bundle 310 becomes shorter, the length of the wire 300 unwound from the wire bundle 310 per one rotation of the reel 110 decreases, and the unwinding speed of the wire 300 from the reel 110 decreases. In order to keep the unwinding speed of the wire 300 constant, it is necessary to increase the rotation speed of the reel 110 as the diameter of the wire bundle 310 decreases.

[0058] The diameter correction calculation unit 157 can calculate the current diameter of the wire bundle 310 based on, for example, the accumulated amount of rotation of the reel 110 since the wire 300 starts to be unwound from the wire bundle 310. The diameter correction calculation unit 157 outputs, for example, a difference between the calculated current diameter of the wire bundle 310 and a reference diameter as the diameter correction value of the wire bundle 310. The reference diameter of the wire bundle 310 can be, for example, the diameter of the wire bundle 310 before the wire 300 is unwound from the reel 110.

[0059] The parameter setting unit 158 ​​sets parameters required for the speed command unit 159 to generate a drive pulse having a period corresponding to the determined value of the payout speed output by the filter unit 156, based on the diameter correction value of the wire bundle 310 output by the diameter correction calculation unit 157. The parameter setting unit 158 ​​can set, for example, the current diameter of the wire bundle 310, the feed speed of the wire 300 by the rotation of the reel 110, the feed amount of the wire 300 per one rotation of the reel 110, etc., as parameters.

[0060] The speed command unit 159 uses the parameters set by the parameter setting unit 158 ​​to generate a drive pulse having a period corresponding to the determined value of the payout spindle speed, and outputs the pulse to the amplifier 151 .

[0061] Fig. 3 is a flow chart showing the procedure of processing executed in the wire rod feeding device of Fig. 1. In the wire rod feeding device 100 of the present embodiment described above, the processing procedure shown in the flow chart of Fig. 3 is repeatedly executed. The master speed detection unit 190 (information acquisition unit) acquires information on the feeding speed of the wire rod 300 by the master roll 210 of the processing machine 200 (step S1). The master speed detection unit 190 can acquire a definite value of the master shaft speed as information on the feeding speed of the wire rod 300 in the processing machine 200.

[0062] In the wire rod feeding device 100, the controller 163 of the drive unit 160 determines a control amount (a definite value of the feed shaft speed) of the rotation speed of the feed roll 120 (step S3). The controller 163 (feed control amount determination unit) determines a definite value of the feed shaft speed for making the feed shaft speed of the wire rod 300 follow the master shaft speed as a control amount of the rotation speed of the feed roll 120. At this time, the controller 163 can determine the definite value of the feed shaft speed based on the deviation between the target position and the current position of the second dancer roll 140.

[0063] In the wire rod feeding device 100, the controller 163 outputs a drive pulse according to the determined value of the feed shaft speed, and the amplifier 161 outputs a control signal according to the drive pulse to the motor 162. As a result, the controller 163 (feed control unit) controls the feed roll 120 to rotate at a speed according to the determined value of the feed shaft speed (step S5).

[0064] In the wire rod feeding device 100, the controller 153 of the drive unit 150 determines the control amount of the rotation speed of the reel 110 (a definite value of the unwinding speed) (step S7). The controller 153 (reel control amount determination unit) determines the definite value of the unwinding speed as the control amount of the rotation speed of the reel 110, for rotating the reel 110 at a speed according to the diameter of the wire rod bundle 310. At this time, the controller 153 can determine the definite value of the unwinding speed based on the deviation between the target position and the current position of the first dancer roll 130.

[0065] In the wire feeding device 100, the controller 153 outputs a drive pulse according to the determined value of the unwinding speed, and the amplifier 151 outputs a control signal according to the drive pulse to the motor 152a of the motor unit 152. As a result, the reel 110 is controlled by the controller 153 (reel control section) to rotate at a speed that unwinds the wire 300 at a constant speed (step S9).

[0066] In the wire feeding device 100 described above, the feed roll 120, which feeds the wire 300 unwound from the reel 110 to the master roll 210 of the processing machine 200, is rotated following the master roll 210. By rotating following the master roll 210, the feed roll 120 feeds the wire 300 to the master roll 210 at a required speed in accordance with the progress of the processing step in the processing machine 200.

[0067] In the wire feeding device 100, the reel 110 is rotated at a speed corresponding to the diameter of the wire bundle 310, regardless of whether the feed roll 120 follows the master roll 210. By rotating at a speed corresponding to the diameter of the wire bundle 310, the reel 110 unwinds the wire of the wire bundle 310 at a constant speed.

[0068] A difference in the feed speed of the wire rod 300 occurs between the reel 110, which unwinds the wire rod 300 at a constant speed, and the feed roll 120, which follows the master roll 210 and unwinds the wire rod 300. This speed difference is absorbed by an increase or decrease in the amount of slack in the unwinding side wire rod portion 320 of the wire rod 300 hung on the first dancer roll 130. Even if the feed shaft speed of the wire rod 300 by the feed roll 120 fluctuates, the speed fluctuation is transmitted, and fluctuations in the unwinding speed of the wire rod 300 by the reel 110 are suppressed.

[0069] In the wire feeding device 100, when the master roll 210 stops and restarts feeding the wire 300 as the processing process of the processing machine 200 progresses, the feed roll 120 stops and restarts feeding the wire accordingly. Therefore, there is no large difference in the feed speed (master shaft speed, feed shaft speed) of the wire 300 by both the master roll 210 and the feed roll 120. Therefore, there is no large change in the amount of slack in the feed-side wire portion 330 between the feed roll 120 and the master roll 210. The second dancer roll 140, which is constantly in contact with the feed-side wire portion 330, does not need to be displaced over a large range.

[0070] When the master roll 210 stops feeding the wire rod 300, the following feed roll 120 may stop feeding the wire rod 300 with a slight delay, which may increase the amount of slack in the feeding-side wire rod portion 330. When the master roll 210 reduces the feeding speed of the wire rod 300, the following feed roll 120 may also reduce the feeding speed of the wire rod 300 with a slight delay, which may cause a similar problem. When the amount of slack in the feeding-side wire rod portion 330 increases, the second dancer roll 140 is displaced downward within its displacement range to apply tension to the feeding-side wire rod portion 330 with the increased amount of slack, thereby eliminating the slack.

[0071] When the master roll 210 resumes the stopped feeding of the wire rod 300, there is a slight delay in the subsequent resumption of feeding of the wire rod 300 by the feed roll 120, which may increase the tension of the feeding-side wire rod portion 330. When the master roll 210 increases the feeding speed of the wire rod 300, there is a slight delay in the subsequent increase in the feeding speed of the wire rod 300 by the feed roll 120, which may increase the tension of the feeding-side wire rod portion 330. When the tension of the feeding-side wire rod portion 330 increases, the second dancer roll 140, while remaining in contact with the feeding-side wire rod portion 330, displaces upward in the displacement range to release the increased tension of the feeding-side wire rod portion 330.

[0072] Therefore, the feed roll 120 can feed the wire 300 to the processing machine 200 at the required speed. This prevents the master roll 210 from rotating faster than the wire 300 due to the feed speed of the wire 300 not being able to keep up with the rotational speed of the master roll 210, resulting in idling relative to the wire 300. This prevents the nip force of the idling master roll 210 from deforming the cross-sectional shape of the wire 300, thereby preventing irregularities that do not actually exist on the surface of the product produced by processing the wire 300 by the processing machine 200.

[0073] In the wire rod feeding device 100, even if the feed roll 120 stops and restarts feeding the wire rod 300 or increases or decreases the feeding speed in accordance with the progress of the processing step of the processing machine 200, the reel 110 continues to feed the wire rod 300 at a feeding speed according to the diameter of the wire rod bundle 310. For this reason, a large speed difference may occur in the feeding speed (feed shaft speed, unwinding speed) of the wire rod 300 by both the feed roll 120 and the reel 110. Therefore, a large change in the amount of slack may occur in the unwinding side wire rod portion 320 between the reel 110 and the feed roll 120. The first dancer roll 130, which is constantly in contact with the unwinding side wire rod portion 320, needs to be displaced in a larger range than the second dancer roll 140.

[0074] When the feed roll 120 stops feeding the wire rod 300 following the master roll 210, the reel 110 continues to feed the wire rod 300 thereafter, so there is a possibility that the amount of slack in the wire rod portion 320 on the payout side will increase significantly. Even when the feed roll 120 reduces the feed speed of the wire rod 300 following the master roll 210, the reel 110 continues to feed the wire rod 300 at a constant speed, so there is a possibility that the same thing will happen. If the amount of slack in the wire rod portion 320 on the payout side increases significantly, the first dancer roll 130 is displaced significantly downward within the displacement range to apply tension to the wire rod portion 320 on the payout side where the amount of slack has increased significantly, thereby eliminating the slack.

[0075] When the feed roll 120 resumes feeding the stopped wire rod 300 following the master roll 210, the reel 110 does not change the feed speed of the wire rod 300, so there is a possibility that the tension of the wire rod portion 320 on the payout side increases significantly. The same thing may occur when the feed roll 120 increases the feed speed of the wire rod 300 following the master roll 210, because the reel 110 does not change the feed speed of the wire rod 300. If the tension of the wire rod portion 320 on the payout side increases significantly, the first dancer roll 130, while remaining in contact with the wire rod portion 320 on the payout side, is displaced significantly upward of the displacement range to release the increased tension of the wire rod portion 320 on the payout side.

[0076] Therefore, even if the feed roll 120 stops or restarts the feeding of the wire rod 300 following the master roll 210, the reel 110 can pay out the wire rod 300 from the wire rod bundle 310 at a constant speed. Therefore, after the feed roll 120 stops or decelerates the feeding of the wire rod 300, the reel 110 rotating by inertia can be prevented from paying out the wire rod 300 from the wire rod bundle 310 at a feeding speed faster than that of the feed roll 120. This prevention can prevent the wire rod 300 from becoming loose around the reel 110 due to the loosening of the winding of the wire rod bundle 310.

[0077] In this embodiment, the feeding-side wire portion 330 between the feed roll 120 and the master roll 210 of the processing machine 200 is hung on the second dancer roll 140, and the second dancer roll 140 applies tension to the feeding-side wire portion 330. Therefore, even if the feed roll 120 is slow to follow the stop, restart, or increase / decrease of the feeding of the wire 300 by the master roll 210, the displacement of the second dancer roll 140 allows the appropriate tension to be continuously applied to the feeding-side wire portion 330, the amount of slack of which changes.

[0078] In this embodiment, the controller 163 of the drive unit 160 of the feed roll 120 determines the control amount of the feed speed of the wire rod 300 by the feed roll 120 based on the displacement amount of the second dancer roll 140. Therefore, even if the amount of slack in the feed-side wire rod portion 330 changes, the feed speed of the wire rod 300 by the feed roll 120 can be controlled so that the feed roll 120 stops or resumes feeding the wire rod 300, or increases or decreases the speed in accordance with the master roll 210.

[0079] If the followability of the feed roll 120 with respect to the master roll 210 is sufficiently high, the second dancer roll 140 may be omitted. When the second dancer roll 140 is omitted, the configuration in which the controller 163 determines the control amount of the feed speed of the wire rod 300 by the feed roll 120 based on the displacement amount of the second dancer roll 140 may also be omitted.

[0080] In this embodiment, the controller 153 of the drive unit 150 of the reel 110 determines the control amount of the payout speed of the wire rod 300 from the reel 110 based on the displacement amount of the first dancer roll 130. Therefore, even if the amount of slack in the payout side wire rod portion 320 changes, the payout speed of the wire rod 300 from the reel 110 can be controlled so that the wire rod 300 is paid out from the reel 110 at a feed speed according to the diameter of the wire rod bundle 310.

[0081] The configuration in which the controller 153 determines the control amount of the payout speed of the wire 300 from the reel 110 based on the displacement amount of the first dancer roll 130 may be omitted.

[0082] In this embodiment, the controller 153 determines a base value of the payout speed of the wire 300 from the reel 110 based on a control amount (a definite value of the feed shaft speed) of the feed speed of the wire 300 by the feed roll 120 determined by the controller 163. The controller 153 filters this base value to determine a control amount (a definite value of the payout speed) of the payout speed close to the current payout speed. The controller 153 rotates the reel 110 at a rotation speed according to the definite value of the payout speed based on the current diameter of the wire bundle 310. Therefore, even if the diameter of the wire bundle 310 changes, the payout speed of the wire 300 from the reel 110 can be kept constant.

[0083] In this embodiment, the controllers 153, 163 of the drive units 150, 160, the signal processing units 172, 182 of the roll position detection units 170, 180, and the master speed detection unit 190 have been described as independent members. However, of course, these may be configured as one device together with other devices. Alternatively, some or all of the sections (154-159, 164-168, 174-177, 184-187, 191-193) that each of them has may be divided and configured using two or more different devices. [Explanation of symbols]

[0084] 100 Wire rod feeding device 110 Reels 120 Feed roll 130 First dancer roll (movable roll on the delivery side) 140 No. 2 dancer roll (feed side movable roll) 153 Controller (reel control amount determination unit, reel control unit) 163 Controller (feed control amount determination unit, feed control unit) 170,180 Roll position detection unit 190 Master speed detection unit (information acquisition unit) 200 Processing machine (wire processing equipment) 210 Master Roll 300 wire rod 310 Wire bundle 320 Wire part on the feeding side 330 Wire part on the sending side

Claims

1. a feed roll for feeding the wire rod along a feed path of the wire rod unwound from the wire rod bundle on the reel to a wire rod processing device; a feed-side movable roll that is stretched over a feed-side wire portion of the wire rod in the supply path between the reel and the feed roll and that is displaced in response to a change in a slack amount of the feed-side wire rod portion to maintain contact with the feed-side wire rod portion; an information acquiring unit that acquires information on a feed speed of the wire in the wire processing device; a feed control amount determination unit that determines a control amount of a rotation speed of the feed roll based on the information so that a feed speed of the wire rod by the feed roll follows a feed speed of the wire rod in the wire processing device; a feed control unit that controls the rotation speed of the feed roll with the control amount determined by the feed control amount determination unit; a reel control unit that controls the rotation speed of the reel to a faster speed as the diameter of the wire bundle becomes shorter; a feed-side movable roll that is stretched over a feed-side wire portion of the wire in the supply path between the feed roll and the wire processing device and that is displaced according to a change in a slack amount of the feed-side wire portion to maintain contact with the feed-side wire portion; Equipped with The feed-side movable roll is displaceable within a larger range than the feed-side movable roll, The feed control amount determination unit determines a control amount of a rotation speed of the feed roll based on a displacement amount of the feed-side movable roll.

2. The wire rod feeding device according to claim 1 , wherein the reel control section controls the rotation speed of the reel based on a displacement amount of the payout side movable roll.

3. 3. The wire rod feeding device according to claim 2, further comprising a reel control amount determination unit that determines a control amount of the rotational speed of the reel based on the control amount determined by the feed control amount determination unit, and the reel control unit controls the rotational speed of the reel with the control amount determined by the reel control amount determination unit.

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