Manufacturing method for interlocked tube and manufacturing device therefor

Abstract

An automatic formation device or an automatic formation system sets an equipment operation time from a required manufacturing time per product during the manufacturing of tubes having a round, polygonal, or oblong cross-section, wherein values are calculated from a product diameter (D), and a pitch (P), a product length (L) and a preset time (T) of a metal band plate to be wound, operations of respective components are controlled on the basis of the calculated values while the respective values are being controlled, and the metal band plate is held by a chuck that is disposed on the tip side of a winding core member and rotates in a synchronized manner so as to prevent loosening of the wound metal band plate by tightening/untightening the metal band plate as needed. Also, a rotation speed correction function for a motor system is added.

Claims

1. A method for manufacturing an interlocked tube, which is of a round, polygonal or oblong cross-section, and shaped by bending an elongate metal band plate into a S-shaped cross section and helically winding the metal band plate onto a winding core member in such a way that two adjacent end portions thereof are engaged with each other by means of members for treating the metal band plate successively in accordance with instructions from a main computing-controlling member, wherein the method comprises the steps of: using the main computing-controlling member to control actions of each member based on values calculated in accordance with product diameter (D), pitch (P), product length (L) and setting time (T) of the wound metal band plate, and to aggregate the values; using a motor controlling member to perform treatment in accordance with instructions from the main computing-controlling member, and to perform three-axis synchronous control on a forming members system spindle motor (III), a material conveying system roller motor (II) and a clamping device system cover motor (V) with the forming members system spindle motor (III) as a reference axis via a pulse instruction from the main computing-controlling member; and using a clamping device to synchronously rotate in such a manner that the wound metal band cannot be loosened, and to clamp the metal band plate in a freely loosen or freely tighten manner.

2. The method according to claim 1, wherein the motor controlling controlling member has a cutting member system pinch roller motor (IV) synchronously controlled based on the three-axis synchronous control.

3. The method according to claim 1, wherein the main computing-controlling member adds a desired correction value to a rotation speed of a motor sy stem.

4. The method according to claim 1, wherein the method further comprises the steps of: using a multistage roll-forming device to shape the tabular metal band plate extracted from a decoiler into a metal band plate with curved side portions; and using an oil-applying device to apply an oily coating agent from an upper portion of the multistage roll-forming device, the oily coating agent being a lubricating oil mixed with water, wherein the multistage roll-forming device and the oil-applying device are pretreatment devices cooperating with the main computing-controlling member.

5. The method according to claim 1, wherein a cutting device cooperating with the main computing-controlling member to receives instruction for absorbing slags and scraping out the accumulated slags.

6. The method according to claim 1, wherein a cutting device cooperating with the main computing-controlling member receives instruction of ejecting the air for cutting.

7. The method according to claim 1, wherein a cutting device cooperating with the main computing-controlling member receives instructions for starting the cutting as in contact with the wound metal band plate, then departing from the wound metal band plate immediately so as to maintain a predetermined distance from the metal band plate, and then stopping the cutting.

8. An apparatus for manufacturing an interlocked tube, which is of a round, polygonal or oblong cross-section, and shaped by bending an elongate metal band plate into a S-shaped cross section and helically winding the metal band plate onto a winding core member in a way that two adjacent end portions thereof are engaged with each other by means of devices for treating the metal band plate successively in accordance with instructions from a controlling device, wherein the apparatus comprises: the controlling device configured to control actions of each device based on values calculated in accordance with product diameter (D), pitch (P), product length (L) and setting time (T) of the wound metal band plate, and to aggregate the values; a motor system configured to perform treatment in accordance with instructions from the controlling device, and to perform three-axis synchronous control on a forming members system spindle motor (III), a material conveying system roller motor (II) and a clamping device system cover motor (V) with the forming members system spindle motor (III) as a reference axis via a pulse instruction from a main computing-controlling member; and a clamping device configured to synchronously rotate in such a manner that the wound metal band cannot be loosened, and to clamp the metal band plate in a freely loosen or freely tighten manner.

9. The apparatus according to claim 8, wherein the motor system has a cutting member system pinch roller motor (IV) synchronously controlled based on the three-axis synchronous control.

10. The apparatus according to claim 8, wherein the controlling device adds a desired correction value to a rotation speed of the motor system.

11. The apparatus according to claim 8, wherein a pretreatment device cooperating with the controlling device comprises: a multistage roll-forming device configured to shape the tabular metal band plate extracted from a decoiler into a metal band plate with curved side portions; and an oil-applying device configured to apply an oily coating agent from an upper portion of the multistage roll-forming device, the oily coating agent being a lubricating oil mixed with water.

12. The apparatus according to claim 8, wherein a cutting device cooperating with the controlling device is configured to receive instruction for absorbing slags and scraping out the accumulated slags.

13. The apparatus according to claim 8, wherein a cutting device cooperating with the controlling device is configured to receive instruction of ejecting the air for cutting.

14. The apparatus according to claim 8, wherein a cutting device cooperating with the controlling device is configured to receive instructions for starting the cutting as in contact with the wound metal band plate, then departing from the wound metal band plate so as to maintain a predetermined distance from the metal band plate, and then stopping the cutting.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a top view showing a general construction of the present invention;

(2) FIG. 2 is a view showing a motor system of the present invention;

(3) FIG. 3 is a perspective view showing the winding of the present invention;

(4) FIG. 4 is a view showing the actions during the cutting of the present invention;

(5) FIG. 5 is a sectional view showing the winding and cutting of the present invention;

(6) FIG. 6 is a top view showing the cutting portion in FIG. 4;

(7) FIG. 7 is a view showing a workpiece conveyance device;

(8) FIG. 8 is a view showing an electrical system of the present invention;

(9) FIG. 9 are a half-sectional view and a partially enlarged sectional view showing an existing flexible tube; and

(10) FIG. 10 is a schematic view showing the manufacturing of an existing interlocked tube.

DETAILED DESCRIPTION

(11) The embodiments of the present disclosure will be described hereinafter in conjunction with the drawings. FIG. 1 is a top view showing a general construction of the present invention. The action of respective devices is, as shown in the figure, performed based on a control device 25 that aggregates the actions of the devices and performs the calculation. Similarly, the action of a system is, as shown in FIG. 8, performed based on a main computing-controlling member 101 of a system body 100. For either of the actions, the equipment operation time is set in accordance with a required manufacturing time per product. Therefore, the calculation is performed in accordance with the product diameter [mm], pitch [mm], product length [mm], and setting time (setting tact, i.e., target machining time per product).

(12) That is, a half-finished interlocked tube 10 used as an exhaust tube for a vehicle or the like is obtained. An elongated, tabular metal band plate 10a with a certain width is bent into a curved metal band plate 10b, with a round, polygonal or oblong cross section, and then shaped into a curved metal band plate 10c which is wound helically. Then, the metal band plate 10c is cut into a predetermined length so as to obtain the half-finished interlocked tube 10 (also referred to as tube) formed of the following devices.

(13) Therefore, during treatment, as shown in FIG. 2, based on the aggregation of a positioning unit of the control device 25 (the main computing-controlling member 101), a motor system I that driving respective devices and moving a metal band plate 10 as a tube is formed of a material conveying system roller motor II for controlling the conveyance of the metal band plate, a forming members system spindle motor III for controlling a winding core member 17 for winding the metal band plate 10 as a tube, a cutting member system pinch roller motor IV located below a cutting core member 18, a clamping device system cover motor V for controlling a clamping device 20, and a cutting unit system unit shifting motor VI moving with the cutting member system pinch roller motor IV and the clamping device system cover motor V synchronously.

(14) Therefore, three-axis synchronous control of the material conveying system roller motor II for controlling the conveyance of the metal band plate, the forming members system spindle motor III for controlling the winding core member 17 for winding the metal band plate 10 as a tube, and the clamping device system cover motor V for controlling the clamping device 20 is performed by using a pulse instruction from the positioning unit, with the forming members system spindle motor III for controlling the winding core member 17 as a reference axis. Further, based on the above, the cutting member system pinch roller motor IV located below the cutting core member 18 is also controlled simultaneously. That is, according to this function, operation status of accelerating or decelerating the motor system I may control operation synchronously. Further, the above-mentioned treatments are not limited here, and may have various designs and variation according to the idea of the invention.

(15) Moreover, the motor system I has a rotation speed correction function because, even if all shafts rotate in the same speed, conveyance may not be steady due to factors such as the material of the metal band plate 10 as a tube, and the sliding of shaping the tube or mechanical consumption, i.e., mechanical losses. As a result, for shafts except the reference shaft of the forming member system spindle motor III for controlling the winding core member 17, an additional rotation speed correction function is added for adjustment so as to enable the rotation speed to become normal. That is, a theoretical value for the rotation speed of the motor system I is calculated according to the shape data of a product, and the speed is corrected by % relative to the theoretical value. For example, when the rotation speed of the material conveying system roller motor II for controlling the conveyance of the metal band plate 10 as a tube is desired to drop by 30% as compared with that of the forming members system spindle motor III for controlling the winding core member 17 as a reference axis, the rotation speed of the roller motor is set to 70% (100%.fwdarw.70%), etc.

(16) That is, the positioning unit of the main computing-controlling member performs calculation and issues a pulse instruction (start-stop) according to input product parameters (product diameter, pitch, product length, manufacturing tact), so that the material conveying system roller motor II can input a value calculated by the positioning unit plus a single correction value. Further, the forming member system spindle motor II performs action without correcting the value calculated by the positioning unit. Further, the clamping device system cover motor V can input the value calculated by the positioning unit plus the single correction value. Further, the cutting member system pinch roller motor IV can input the value calculated by the positioning unit plus the single value. Further, the cutting unit system unit motor VI can input the value calculated by the positioning unit plus the single correction value.

(17) Further, an example is illustrated for reference as preliminary calculation.
Length [mm] of material necessary for one product=Product diameter [mm](product length [mm]pitch [mm])
Material conveying speed(theoretical value [mm/min](linear velocity))=Material length [mm]setting time [second]60 [seconds]
Speed setting value [mm/min] of roller motor=Material conveying speed [mm/min]roller rotation correction [%]
Speed setting value of spindle [rev/min]=Product length [mm] pitch [mm]setting time [second]60 [seconds]

(18) There is no correction for basic axis

(19) Speed of JOG sets operating by m/min
Speed setting value [rev/min] of cover motor as clamping device 20=Product length [mm]pitch [mm]setting time [second]60 [second]>clamping device rotation correction [%]
Speed setting value [mm/min] of pinch roller=material conveying speed [mm/min]pinch roller rotation correction [%]
*Speed setting value [mm/min] of unit shifting=Advance speed [mm/min] of productunit shifting correction [%]=Product length [mm]setting time [second]60 [seconds]unit shifting correction [%]

(20) Herein, configuration and actions of the devices are described in conjunction with FIG. 1. To begin with, a tabular metal band plate 10a disposed at a decoiler 12 is extracted from the decoiler 12, and then fed into a pretreatment device 13 including a multistage roll-forming device 14 and an oil-applying device 15. As shown in FIG. 10, the multistage roll-forming device 14 in the pretreatment device 13 is the well-known multistage roll-forming device substantially identical to the device in the past. The tabular metal band plate 10a is inserted into the respective stage of the multistage roll-forming device while forming the curved metal band plate 10b with an S-shaped cross section.

(21) In addition, an upper portion of the multistage roll-forming device 14 in the pretreatment device 13 is integrally provided with the oil-applying device 15 for applying an oily coating agent, which is a lubricating oil mixed with water, onto a back surface of the successively formed curved metal band plate 10b.

(22) A main body 11 of the apparatus helically winds the curved metal band plate 10b extracted from the pretreatment device 3 onto a winding core member 17 (see left side in FIG. 3). That is, the feeding direction of the curved metal band plate 10b extracted from the pretreatment device 13 is changed by direction-variable guiding device 16 having variable guiding rollers 16a . . . so as to helically wind the curved metal band plate 10b onto the winding core member 17.

(23) In addition, a guiding device 19 is provided at the bottom of the winding core member 17. The guiding device 19 has winding guiding rollers 19a . . . provided on an axial line thereof, so that the curved metal band plate 10b in engagement with each other slides at a peripheral of the winding core member 17, so as to be wound helically. In FIG. 3, direction A is a winding-in direction.

(24) The winding core member 17 is driven to rotate by means of a motor 24 connected to the main body 11 of the apparatus, so as to wind the curved metal band plate 10b in a way that the end portions thereof are engaged with each other. In addition, a cutting core member 18 is provided in front of the winding core member 17, and an opening 18a (as shown in FIG. 6) for recovering slags is through provided at a predetermined position of the cutting core member 18, i.e., a position opposite to a cutting member 21a at a front end of a plasma cutting device 21, which will be described hereinafter.

(25) Moreover, clamping device 20 for clamping the helical, metal band plate 10b wounded on the winding core member 17 (direction B in FIG. 3) is provided in front of the winding core member 17. As a result, it is able to prevent the springback or looseness which is caused by the rotation of the helical, metal band plate 10b toward an opposite direction (direction C in FIG. 3), while the clamping device is freely assembled in a detachable and switchable manner. In addition, the structure of the clamping device 20 is not particularly defined herein, as long as it can function as mentioned above.

(26) The movable plasma cutting device 21 is provided at an upper portion of the cutting core member 18. The plasma cutting device 21, although being movably arranged at the upper portion of the cutting core member 18 in a unit shifting manner as mentioned above (not shown), is provided with a cutting member 21a at its front end for producing a plasma arc. The air for cutting is ejected from a cutting nozzle at a front opening of the cutting member 21a so as to heat and melt the helical, metal band plate 10b made of stainless steel, thereby to cut it of instantaneously.

(27) For the discharge action of the cutting member 21a, as shown in FIG. 4, when the cutting member 21a is in a standby state, it is located above the cutting core member 18 (see FIG. 4(a)). If the cutting member 21 a is in action, it moves downward so that the cutting nozzle is in contact with the helical, metal band plate 10c instantaneously and discharges (see FIG. 4(b)). After that, the cutting member moves upward to a predetermined position, and cuts the metal band plate 10c as it discharges (see FIG. 4(c)). Finally, the discharge is stopped and the cutting member 21a returns to the initial position (see FIG. 4(a)).

(28) In this situation, the cutting member 21a discharges while an electrode is in contact with the helical metal band plate (workpiece), after that, the cutting is performed while maintaining an appropriate distance between the electrode and the helical metal band plate (workpiece), and then the current is switched off so as to stop the cutting, as a result, it is able to prevent from cutting incompletely, or to prevent an excessively-melted cut portion and a deformation as the discharge is not stopped after the cutting.

(29) In addition, various heat sources may be applicable, and in this embodiment, it is appropriate to employ the cutting used air with a high-temperature plasma arc to heat and melt and then cut off instantaneously. As a result, it is unnecessary to use the expensive inert gases e.g., Ar) or CO2, as those used in the prior art, and the cost will be reduced.

(30) FIGS. 5 and 6 show an enlarged portion of a cutting position. In FIG. 5, the cutting core member 18 and the clamping device 20 are provided at the cutting position in the forward direction of the helically wound curved metal band plate 10c. Meanwhile, slag recovering device 22 is provided inside the metal band plate 10e, the cutting core member 18 and the clamping device 20, and it is designed as a structure into which a tube 22a and a scraping device 22b may be inserted. In addition, the opening 18a of the cutting core member 18 is a slag receiving port, which is provided at a position opposite to the cutting member 21a of the plasma cutting device 21.

(31) In FIG. 6, K1 represents an imaginary point of a starting position for cutting, K2 represents an imaginary point of an end position for cutting, and a distance therebetween represents a pitch for one revolution. However, when the metal band plate 10c moves for one pitch while rotating, the cutting member 21a will synchronously move with the metal band plate 10c for one pitch while rotating. In this way, it is cut along a line interlocked between the imaginary point K1 of the starting position for cutting and the imaginary point K2 of the end position for cutting.

(32) As mentioned above, the slag recovering device 22 includes the tube 22a, the scraping device 22b and a discharge path 22c. The opening 18a of the cutting core member 18 for extracting the slags produced during cutting is provided at a position of the cutting core member 18 opposite to the cutting portion 21a to serve as the slag receiving port for receiving the slags produced during the cutting. The tube 22a is used to remove the slags absorbed from the opening 18a to the outside, the scraping device 22b is used to scrape the slags, and the discharge path 22c is used to remove the scraped slags.

(33) In addition, a movement pitch for one rotation amount of the winding core member 17 and the cutting core member 18 (which, however, does not rotate itself), e.g., a distance between the starting position a for cutting and the end position b for cutting or a cutting time, is calculated as product diameterpitchproduct lengthsetting time. The term setting time represents a production time (a setting tact) for each product. By setting and executing the setting tact, it is able to ensure the planned, stable production.

(34) A workpiece conveyance device 23 is provided at a final stage of the main body 11 of the apparatus, and it can move toward a Y-axis (up and down) and an X-axis (right and left). A workpiece clamping body 23a is provided at a front end of the workpiece conveyance device 23, so as to clamp the half-finished interlocked tube 10 which is cut into a predetermined size and convey it to a recovering case 23b at a conveyance region. In addition, the structure of the workpiece conveyance device 23 or the workpiece clamping body 23a is not particularly defined, as long as it can function as mentioned above.

(35) The structure of an electrical system according to the present disclosure will be described hereinafter in conjunction with FIG. 8. The electrical system 100 is a system of instructions from a main computing-controlling member 101 (reference number 25 in FIG. 1) that performs the calculation and control in accordance with the actions of the members, which includes: a bending treatment controlling member 102 (13 in FIG. 1) that outputs the instruction signal to bend the tabular metal band plate 10a into the curved metal band plate 10b; an oil-application controlling member 103 (14 in FIG. 1); a motor controlling member 104 (24 in FIG. 1); a winding treatment controlling member 105 (11 in FIG. 1) that controls the winding core member 17 to obtain the helically wound curved metal band plate 10c; a clamp controlling member 106 (20 in FIG. 1); a cutting controlling member 107 (21 in FIG. 1); a slag controlling member 108 (22 in FIG. 1); a workpiece conveyance controlling member 109 (23 in FIG. 1); a decoding member 110 (12 in FIG. 1), and an inputting-displaying member 111, etc.

(36) As mentioned above, the main computing-controlling member 101 performs the calculation and control for the actions of the members connected to the apparatus. The action calculation is performed in accordance with the product diameter, pitch, product length, setting time (setting tact), and the position status of the action of the members.

(37) Based on input information from the decoiling member 110 when the actions are performed or the actions performed by the members in the apparatus, the bending treatment controlling member 102 sends instruction in accordance with the instructions from the main computing-controlling member 101, so that the tabular metal band plate 10a extracted from the decoiler 12 is bent in the pretreatment device 13 into the curved metal band plate 10b.

(38) The oil-application controlling member 103 receives the instruction when an action signal is input along with the operation of the bending treatment controlling member 102, so that the coating agent, e.g., the lubricating oil mixed with water, is applied onto a back surface of the curved metal band plate 10b in the multistage roll-forming device 14.

(39) When the curved metal band plate 10b is extracted from the pretreatment device 13 and fed into the main body 11 of the apparatus, instructions are input from the main computing-controlling member 101 to the motor controlling member 104, so as to operate the winding core member 17.

(40) By sending instruction signal to the motor controlling member 104, the winding core member 17 starts to rotate, thereby to form the helically wound curved metal band plate 10c. In case the curved metal band plate 10b fed by the multistage roll-forming device 14 is superposed on the curved metal band plate 10c that has been wound into a helical form, the winding guiding roller 19a will be damaged. In order to avoid this situation, a load on the winding guiding roller 19a will be measured, and when the measured value is greater than a predetermined value, the winding treatment controlling member 105 will send signal to the main computing-controlling member 101 to stop the apparatus.

(41) When the winding core member 17 and the cutting core member 18 (which, however, does not rotate itself) start to rotate, the clamping device 20 will act to rotate as well. Based on a value calculated in accordance with the product diameter, pitch, product length and setting time (setting tact), a filling instruction signal from the clamping member 20 will be output to the front portion of the curved metal band plate 10b through the instructions from the main computing-controlling member 101.

(42) When the helically wound curved metal band plate 10c reaches a predetermined length, the main computing-controlling member 101 will send instruction signal to the cutting controlling member 107 in accordance with the signal from the plasma cutting device 21. At this time, the cutting member 21a of the plasma cutting device 21 moves along with the curved metal band plate 10c which is helically wound in accordance with the instruction from the main computing-controlling member 101 in parallel to the direction of winding one pitch for one revolution. By this action, the helically wound curved metal band plate 10c is cut in the direction perpendicular to axial direction instead of being cut in helical direction. In addition, the cutting member 211a receives instruction to perform the actions with respect to the helically wound curved metal band plate 10c to be kept at the initial position, to be contacted, to be kept at a predetermined distance, and to be kept at the initial position again. As a result, the cutting is maintained in a well state.

(43) Then, the slag controlling member 108 operates in accordance with the instruction from the main computing-controlling member 101, and inputs instruction signal for absorbing and scraping the slags which have been cut in the slag recovering device 22.

(44) Next, a signal is input into the workpiece conveyance member 109 by the instruction from the main computing-controlling member 101. The workpiece clamping body 23a starts to operate in accordance with the instruction, maintains the half-finished interlocked tube 10 that has been cut, and releases the clamping member 20. The clamping member 20 and the winding core member 17 will move backward so as to be withdrawn from the interlocked tube 10. Then, the workpiece clamping body 23a will operate to convey the interlocked tube onto the workpiece receiving member 23b.

(45) In addition, reference number 111 represents an inputting-displaying member which may include, as expected, an appropriate unit such as an inputting unit or an image displaying unit.

(46) So, in this embodiment, when shaping the tube with a round cross section or a polygonal or oblong cross section in a non-loose, precise and easy way, because the clamping device synchronously rotates with the wound metal band plate, for example, even an interlocked tube is round or oblong, it is able to easily and precisely shape a tube in a rotatable, non-loose, non-twisting and efficient manner. Further, when the automatic formation device (an automatic control unit) obtains a predetermined (desired) average setting tact, i.e., a production time, for each product manufactured, it is calculated according to product diameter (D), pitch (P), product length (L) and setting time (T). Meanwhile, the motor control member performs the three-axis synchronous control to the forming members system spindle motor III, the material conveying system roller motor II and the clamping device system cover motor V with the forming members system spindle motor III as a reference axis in accordance with the pulse instruction from the main computing-controlling member, and a clamping device that is disposed on the tip side of a winding core member rotates in a synchronized manner so as to prevent loosening of the wound metal strip plate, so it is able to control automatically in an easy, precise and efficient way and ensure planned, stable production.

(47) In addition, as the cutting member system pinch roller motor IV is controlled synchronously according to the three-axis synchronous control, it is able to further control automatically in an easy, precise and efficient way and ensure planed, stable production.

(48) In addition, as the motor system has an ability to correct the rotation speed, even if all shafts rotate in the same speed, conveyance may not be steady due to factors such as the material of the metal band plate 10 as a tube, and the sliding of shaping the tube or mechanical consumption, i.e., mechanical losses. So, it is able to adjust the rotation speed to become normal.

(49) In addition, due to the other requirements to easily and efficiently shape the interlocked tube, the oil-applying device is not required to be arranged at a preceding stage of the multistage roll-forming device, instead an upper portion of the multistage roil-forming device has an oil-applying function integrally so as to work efficiently. Meanwhile, the coating agent is also improved, e.g., the lubricating oil mixed with water may be used in order to improve the operation efficiency and reduce the cost. Further, when the interlocked tube cooperating with the main body of the apparatus is cut off, the slags produced belong to granular atomized slags; besides, the slags accumulated during the cutting will be removed efficiently.

(50) Hence, according to the present invention, it is able to obtain the interlocked tube by easily and precisely shaping a tube with a round cross section or a polygonal or oblong cross section in a non-loose manner, so as to provide excellent machining performance when the interlocked tube is cut off, and meanwhile it is able to shape the interlocked tube automatically, so as to provide excellent operation efficiency for the apparatus itself. As long as the above-described actions can be performed, and are not limited to the disclosure of the invention, all kinds of variation, design and modification can be made.

(51) In addition, as for other application of the interlocked tube, it may be applied to a spiral duct of an air conditioner, etc by winding a steel plate into a spiral liner and winding a steel wire into a spiral tube.

REFERENCE SIGN LIST

(52) 10metal band plate for interlocked tube 10atabular metal band plate 10bcurved metal band plate 10chelically wound curved metal band plate 11main body of the apparatus 12decoiler 13pretreatment device 14multistage roll-forming device 15oil-applying device 16direction-variable guiding device 16avariable guiding roller 17winding core member 18cutting core member 18aopening of core member 19winding guiding device 19awinding guiding roller 20clamping device 20aclamping body 21plasma cutting device 21acutting member 22slag recovering device 22atube 22bscraping device 22cdischarge path 23workpiece conveyance device 23aworkpiece clamping body 23bworkpiece receiving member 24motor 25control device 26display device 100system body 101main computing-controlling member 102bending treatment controlling member 103oil-application controlling member 104motor controlling member 105winding treatment controlling member 106clamping controlling member 107cutting controlling member 108slag controlling member 109workpiece conveyance controlling member 110decoiling member 111inputting-displaying member Imotor system IImaterial conveying system roller motor IIIforming members system spindle motor IVcutting member system pinch roller motor Vclamping device system cover motor VIcutting unit system unit shifting motor