CN113710600B - Device and method for processing strip - Google Patents
Device and method for processing strip Download PDFInfo
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- CN113710600B CN113710600B CN201980095046.7A CN201980095046A CN113710600B CN 113710600 B CN113710600 B CN 113710600B CN 201980095046 A CN201980095046 A CN 201980095046A CN 113710600 B CN113710600 B CN 113710600B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/06—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers for making cross-wound packages
- B65H54/08—Precision winding arrangements
Abstract
Embodiments of the present disclosure relate to an apparatus and method for processing a strip material. The apparatus includes an actuator configured to apply tension to the strip material and a drive assembly coupled to the actuator, the drive assembly including coaxially disposed first and second motors, the first motor being disposed upstream of the second motor and having a power rating greater than the second motor. The apparatus also includes a controller coupled to the drive assembly and configured to determine an output power profile for each of the first and second motors based on a target tension to be applied to the strip material, each of the first and second motors configured to provide a driving force to the implement component according to the output power profile to apply the target tension to the strip material on the implement component. In this way, undisturbed switching of the operating modes of the drive assembly can be achieved in the operating state of the drive assembly based on the target tension of the strip, thereby achieving accurate control of the strip tension for different thickness specifications.
Description
Technical Field
Embodiments of the present disclosure relate generally to electromechanical devices and, more particularly, to an apparatus and method for processing strip material.
Background
In industrial production, since the strip material has different thicknesses, different tensions are applied when processing the strip material, which requires precise control of the tensions. Traditionally, such tension control has been achieved by one motor plus switchable gearboxes with different orders.
However, the multistage gear box is complicated and expensive in construction, and higher maintenance must be performed in consideration of increased operating costs due to the varying movement inside the multistage gear. The multistage gear box can only perform switching operation when the motor stops running. The tension on the strap is released first and then the change of the different gear can take place. This leads to a reduction in productivity during normal operation. Even if the gear selection is incorrect, the switching is not allowed again during the machining. If the tension is too low, the requirements of the strip processing cannot be met, and if the tension is too high, the strip may break.
Disclosure of Invention
To at least partially address the problems of the prior art and other potential problems, an apparatus for processing a strip material is provided.
In a first aspect of the disclosure, an apparatus for processing a strip material is provided. The apparatus comprises: an actuator configured for applying tension to a tape and a drive assembly coupled to the actuator, the drive assembly including a first motor and a second motor coaxially disposed, the first motor being disposed upstream of the second motor and having a power rating greater than the second motor. The apparatus also includes a controller coupled to the drive assembly and configured to determine an output torque profile of each of the first and second motors based on a target tension to be applied to the strip material, the first and second motors each being configured to provide a driving force to the implement component according to the output torque profile to apply the target tension to the strip material on the implement component.
The apparatus for processing a strip material proposed in the first aspect includes a drive assembly composed of two motors having different power ratings, whereby different target tensions can be applied to the strip material by controlling the output torque profiles of the two motors, respectively, thereby improving the tension control range of the strip material to achieve precise control of the tensions of the strip materials of different thickness specifications.
In some embodiments, the actuator comprises a take-up roller for taking up the strip and arranged coaxially with the first and second motors. In some embodiments, the actuator includes a plurality of tension rollers for generating tension on the strip material by simultaneously applying frictional forces to the strip material passing over the plurality of tension rollers.
Since separate control of the output torques of the first and second motors in the drive assembly can be achieved, the driving force of the drive assembly can be applied to the actuating member in accordance with the target tension, thereby simplifying the structure for the strip processing apparatus.
In some embodiments, the apparatus further includes an operating mode determination module configured to determine an operating mode of the drive assembly based on the target tension and the power ratings of the first and second motors. The operation modes include: a first mode in which a target tension is applied solely by the first motor; a second mode in which the target tension is applied solely by the second motor; and a third mode in which the target tension is applied by both the first motor and the second motor. The apparatus also includes a switching parameter determination module configured to determine operating mode switching parameters for the first and second motors based on the operating mode. In addition, the apparatus includes a regulator. The regulator is configured to regulate output torques of the first and second electric machines based on the determined operating mode and mode switching parameter to enable the drive assembly to switch to one of the first, second and third modes.
By determining the operating mode and the operating mode switching parameters of the drive assembly, the drive assembly can be switched among the three modes described above without jitter. On the one hand, tension control under the running state of the driving assembly is realized, and on the other hand, switching stability is ensured. This is particularly important for thinner strip materials, such as foils. Since the jitter at the switching may cause breakage of the strip.
In some embodiments, the apparatus further comprises a loss acquisition module configured to acquire a total loss of the drive assembly. The apparatus also includes a loss profile determination module configured to determine a first loss of the first electric machine and a second loss of the second electric machine based on the total loss value and the power ratings of the first electric machine and the second electric machine. In addition, the apparatus includes a loss compensator. The loss compensator is configured to compensate for respective losses of the first and second electrical machines based on the determined first and second losses.
Losses, such as inertial losses, are incurred in providing drive power due to the different power ratings of the first and second motors and the fact that they remain energized in various operating modes of the drive assembly. By performing loss compensation on the first motor and the second motor based on rated power of the first motor and the second motor, the control accuracy of the tension in a constant-speed steady state and a variable-speed dynamic state can be improved, and the tension control ranges and the stability of the running state of the first motor and the second motor in the first mode, the second mode and the third mode are increased.
In some embodiments, the device further includes a receiver coupled to the peripheral device and configured to receive a parameter associated with the target tension from the peripheral device. Additionally, the apparatus includes a transmitter coupled to the drive assembly and configured to transmit the determined output torque and loss compensation of each of the first and second motors to the drive assembly.
By means of the transmitter and the transceiver, the device is enabled to rapidly implement tension control according to a target tension and to enable the drive assembly to immediately apply a corresponding driving force based on the tension control.
In some embodiments, the controller includes an operating mode determination module configured to determine an operating mode of the drive assembly based on the target tension and the power ratings of the first and second motors. The operation modes include: a first mode in which a target tension is applied solely by the first motor; a second mode in which the target tension is applied solely by the second motor; and a third mode in which the target tension is applied by both the first motor and the second motor; a switching parameter determination module configured to determine an operating mode switching parameter for the first and second electric machines based on the operating mode. In addition, the controller also includes a regulator. The regulator is configured to regulate output torques of the first and second electric machines based on the determined operating mode and mode switching parameter to enable the drive assembly to switch to one of the first, second and third modes. The controller further comprises a loss acquisition module configured to acquire a total loss of the drive assembly; a loss profile determination module configured to determine a first loss of the first electric machine and a second loss of the second electric machine based on the total loss value and the power ratings of the first electric machine and the second electric machine. A loss compensator is also included. The loss compensator is configured to compensate for respective losses of the first and second electrical machines based on the determined first and second losses. The controller further includes a receiver coupled to the peripheral device and configured to receive a parameter associated with the target tension from the peripheral device; and a transmitter coupled to the drive assembly and configured to transmit the determined output torque and loss compensation of each of the first and second motors to the drive assembly.
In a second aspect of the present disclosure, a method for processing a strip material is provided. The method is performed by an apparatus for processing strip material as described in the first aspect.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.
Drawings
The above and other objects, features and advantages of the embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
fig. 1 shows a schematic view of an apparatus for processing a strip material according to an embodiment of the present disclosure;
fig. 2 shows a schematic view of an apparatus for processing a strip material according to an embodiment of the present disclosure.
Like or corresponding reference characters designate like or corresponding parts throughout the several views.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.
The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.
As described above, in the process of processing the strip material, different tensions are applied to the strip material according to the thickness, material, and the like of the strip material. Conventional approaches use a single motor plus a switchable gearbox to achieve the tension control described above. However, the gearbox is expensive to maintain and the change in the applied tension can only be achieved by shifting the gear of the gearbox when the motor is not operating, and if the gear set cannot be adapted to the tension required by the strip, the application of tension cannot be controlled with the motor operating.
In order to reduce the number of stages of the gear box, it is considered to use dual motors connected to each other by a clutch to provide corresponding tension to the strip in an apparatus for processing the strip. In operation, rather than varying the number of stages of the gearbox with a single motor, this scheme provides different tensions by coupling or decoupling one of the motors using a clutch. However, this solution still requires cutting off the power supply to the motor and releasing the tension to achieve tension control. Furthermore, the range of tension control is limited since the two motors have the same power rating and characteristics.
The use of two motors with different powers and characteristics to achieve control of tension enables an extended tension control range, requiring interruption of the operation of the drive assembly if a motor with less power is placed upstream of a motor with more power and a clutch is used to achieve coupling and decoupling between the large and small motors. In addition, since the motor shaft of the small motor needs to carry the torques of the two motors, the requirement for the motor shaft will increase. Accordingly, the manufacturing cost of the small motor may be significantly increased.
Embodiments of the present disclosure provide an apparatus for processing a strip material that includes a drive assembly implemented by two motors having different characteristics and that can switch between different modes of operation without stopping the drive assembly to provide different tensions needed to process the strip material.
Fig. 1 shows a schematic view of an apparatus for processing a strip material according to an embodiment of the present disclosure. As shown in fig. 1, the apparatus 100 includes an actuator 110, the actuator 110 being configured to apply tension to a strip 111. The device 100 also includes a drive assembly 120 coupled to the actuator 110. The driving assembly 120 includes a first motor 121 and a second motor 122. The first motor 121 and the second motor 122 are arranged coaxially with each other. The first motor 121 is disposed upstream of the second motor 122, i.e., at a position closer to the winding member 110 with respect to the second motor 122, and the first motor 121 is configured to have a power rating larger than that of the second motor 122.
The apparatus 100 shown in fig. 1 further comprises a controller 130. The controller 130 is coupled to the drive assembly 120 and is arranged to determine an output torque profile of the first motor 121 and the second motor 122 based on a target tension to be applied on the strip material 111.
In some embodiments, the target tension to be applied to the strip material 111 may be given by a tension parameter model stored in the controller 130 based on characteristic parameters of the performing component and characteristics of the strip material, such as material and thickness of the strip material. Further, the target tension to be applied to the strip 111 may be provided by the output of the peripheral device 140. The peripheral device 140 may be, for example, a human-machine interface.
The controller 130 can provide the determined output torque profiles of the first and second electric machines 121, 122 to the drive assembly 120. The first motor 121 and the second motor 122 are each configured to provide a driving force to the actuator 110 to apply a target tension to the strip material on the actuator 110 according to an output torque profile from the controller.
By the driving assembly 120 consisting of two motors having different power ratings, also called asymmetric dual motors, it is possible to apply different target tensions to the strip 111 by controlling the output torque profiles of the two motors, respectively, thereby improving the tension control range of the strip to achieve precise control of the strip tension.
Furthermore, no further clutch has to be arranged between the first and second electric machines coupled in series to decouple them. During normal operation, both motors are always energized, thereby enabling free switching of the drive assembly operating modes without stopping.
In some embodiments, the actuator 110 can be implemented as a take-up roll (such as shown in fig. 1) for taking up the strip 111 and arranged coaxially with the first motor 121 and the second motor 122. In some embodiments, the actuation member 110 may also be implemented by a plurality of tension rollers. These tension rollers can act together on the strip passing over the tension rollers, for example each providing a corresponding friction force, to apply tension to the strip. Here, since the separate control of the output torques of the first motor 121 and the second motor 122 in the driving assembly 120 can be achieved, the driving force of the driving assembly 120 can be applied to the take-up roller according to the target tension, thereby simplifying the structure for the strip processing apparatus 100.
In some embodiments, a gearbox is also disposed between the actuator 110 and the first motor 121.
A schematic view of an apparatus for processing a strip material according to yet another embodiment of the present disclosure is shown in fig. 2. As can be seen in fig. 2, the actuating element 110 and the driving assembly 120 are identical to the arrangement shown in fig. 1 and will not be described again here.
In fig. 2, the apparatus 100 for processing a strip material may include a receiver 137, the receiver 137 being coupled to a peripheral 140. The receiver 137 may be configured to receive parameters from the peripheral device 140. The parameter may be, for example, a tension model parameter, a measured parameter associated with an operating state of the apparatus 100, or the like.
In some embodiments, the receiver 137 can be coupled to the operation mode determination module 131. The operating mode determination module 131 may be configured to determine the operating mode of the drive assembly 120 based on the received target tension and the power ratings of the first and second motors 121, 122.
In some embodiments, the operating modes may include a first mode, a second mode, and a third mode. In the first mode, the target tension is applied by the first motor 121 alone. In the second mode, the target tension is applied solely by the second motor 122. And in the third mode, the target tension is applied by both the first motor 121 and the second motor 122.
It should be noted that, as mentioned above and noted, the first and second electric machines 121 and 122 are in an energized state regardless of the mode in which the drive assembly is operating. Therefore, even in the first and second modes, the target tension is applied only by the first motor 121 or the second motor 122, which should be understood that the driving force caused by the first motor 121 or the second motor 122 does not have an influence on the tension applied to the belt material, and should not be regarded that the first motor 121 or the second motor 122 is in a stopped state. Both motors 121, 122 are in operation, improving the tension control range and dynamic stability under the single motor control mode. For example, in the single-motor operation mode of the small motor, if the large motor stops running, the total loss of the large motor and the small motor will account for a small part (for example, 20%) of the effective torque of the small motor, and if the large motor is completely and independently borne by the small motor, the original effective tension control range of the motor will be reduced. In addition, in the dynamic acceleration and deceleration process, the loss caused by the rotational inertia of the large motor influences the tension control precision of the small motor in the dynamic state.
The operation mode determination module 131 is coupled to a switching parameter determination module 132, the switching parameter determination module 132 being configured to determine operation mode switching parameters for the first and second electrical machines based on the operation mode. The "operation mode switching parameter" herein may be regarded as a switching slope for the output torques of the first motor 121 and the second motor 122 when the drive assembly 120 is switched from one mode to another. The switching slope can ensure stability of tension variation during operation mode switching. This is particularly important for thinner tapes, such as copper foil. Since the flutter at the switching can cause breakage of the strip.
The switching parameter determination modules 132 may each be coupled to a regulator 133. The regulator 133 is capable of regulating the output torques of the first and second electric machines 121, 122 based on the determined operating mode and mode switching parameter to enable the drive assembly 120 to switch to one of said first, second and third modes.
In some embodiments, the regulator 133 may determine the tension distribution rate of the first and second electric machines 121 and 122 in each mode according to the rated power of the first and second electric machines 121 and 122 and the determined operation mode. For example, if the power of the first motor 121 is P1 and the tension distribution ratio is T1, and the power of the second motor 122 is P2 and the tension distribution ratio is T2, the tension distribution ratios in different operation modes can be shown by the following table:
table 1: tension distribution ratio in different modes
| First mode | Second mode | Third mode | |
| T1 | 1 | 0 | P1/(P1+P2) |
| T2 | 0 | 1 | P2/(P1+P2) |
It should be understood that, in general, the switching of the operation modes should be performed sequentially so that the total output torque of the first and second electric machines 121 and 122 is changed from large to small or from small to large. For example, the second mode is switched to the first mode, and then to the third mode, or vice versa.
Furthermore, the above and mentioned switching slope for operation mode switching enables the above switching process to be smoothly accomplished. For example, when the driving assembly is switched from the second mode to the first mode, T1 is not directly changed from "0" to "1", but gradually changed to 1 with a certain switching slope, e.g., 1/2.
In some embodiments, the apparatus 100 may further include a loss acquisition module 134 configured to acquire a total loss of the drive assembly 120. The loss here may include electrostatic loss of the device and inertial loss due to the asymmetric dual motor. The total loss value may be derived based on a predetermined relationship of the device operating speed and the loss parameter. The loss profile determination module 135 is coupled to the loss acquisition module 134 and is configured to determine a first loss of the first electric machine 121 and a second loss of the second electric machine 122 based on the total loss value and the power ratings of the first electric machine 121 and the second electric machine 122.
For example, the first loss of the first electric machine 121 may be (total static loss + total inertial loss) × P1/(P1+ P2), and the second loss of the second electric machine 122 may be (total static loss + total inertial loss) × P2/(P1+ P2).
In some embodiments, the loss compensator 136 is coupled to the loss profile determination module 135 to perform respective loss compensation for the first and second electric machines 121 and 122 based on the determined first and second losses.
Losses due to the first and second motors 121 and 122 having different power ratings and maintaining the energized state in various operation modes of the driving assembly 120 and other losses due to intrinsic characteristics of the devices can be compensated for by losses of the first and second motors based on their power ratings, the life span of the driving assembly can be increased and the operating state can be maintained stable.
In some embodiments, the apparatus 100 further comprises a transmitter 138 to which the regulator 133 and the loss compensator 136 described above can be respectively coupled to the transmitter 138. The transmitter 138 is coupled to the drive assembly 120 and transmits the determined output torque and loss compensation of each of the first and second motors to the drive assembly 120.
In this way, the apparatus 100 is able to effectively implement tension control according to the target tension and enable the driving assembly 120 to apply a corresponding driving force based on the tension control on an immediate basis.
Further, although not shown in the drawings, a frequency converter for applying an output torque to the first motor 121 and the second motor 122 may be included between the transmitter 138 and the driving assembly 120.
It should be understood that the components 131 and 138 shown in fig. 2 can be included in the controller 130 shown in fig. 1, or can be separate components independent of the controller 130. The components 131-138 may be implemented as a circuit or system on a chip (SOC). The components 131 and 137 shown in fig. 2 may be replaced, added, or deleted without departing from the principles and concepts of the present disclosure.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. An apparatus (100) for processing a strip (111), comprising:
-an actuating member (110) for applying tension to the strip (111);
a drive assembly (120) coupled to the actuating member (110) and comprising a first motor (121) and a second motor (122) coaxially arranged, the first motor (121) being arranged upstream of the second motor (122) and having a power rating greater than that of the second motor (122); and
a controller (130) coupled to the drive assembly (120) and configured to determine respective output torque profiles of the first motor (121) and the second motor (122) based on a target tension to be exerted on the strip material,
the first motor (121) and the second motor (122) are each configured to provide a driving force to the implement component (110) to apply the target tension to the strip material (111) on the implement component (110) according to the output torque profile.
2. The apparatus (100) according to claim 1, wherein the actuating member (110) comprises a take-up roller for taking up the strip (111) and arranged coaxially with the first motor (121) and the second motor (122).
3. The apparatus (100) according to claim 1, wherein the performing means (110) comprises a plurality of tension rollers for generating the tension acting on the strip material (111) by simultaneously applying a friction force to the strip material (111) passing over the plurality of tension rollers.
4. The apparatus (100) of claim 1, further comprising:
an operating mode determination module (131) configured to determine an operating mode of the drive assembly (120) based on the target tension and the power ratings of the first and second motors (121, 122), the operating mode comprising: a first mode in which the target tension is applied solely by the first motor (121); a second mode in which the target tension is applied solely by the second motor (122); and a third mode, wherein the target tension is applied by both the first motor (121) and the second motor (122);
a switching parameter determination module (132) configured to determine operating mode switching parameters of the first and second electrical machines (121, 122) based on the operating mode; and
a regulator (133) configured to regulate output torques of the first and second electric machines (121, 122) based on the determined operating mode and the mode switching parameter to enable the drive assembly (120) to be switched into one of the first, second and third modes.
5. The apparatus of claim 1, further comprising:
a loss acquisition module (134) configured to acquire a total loss of the drive assembly (120);
a loss profile determination module (135) configured to determine a first loss of the first electric machine (121) and a second loss of the second electric machine (122) based on the total loss value and the rated powers of the first electric machine (121) and the second electric machine (122); and
a loss compensator (136) configured to perform respective loss compensation for the first and second electrical machines (121, 122) based on the determined first and second losses.
6. The apparatus of claim 5, further comprising:
a receiver (137) coupled to a peripheral (140) and configured to receive a parameter associated with the target tension from the peripheral (140); and
a transmitter (138) coupled to the drive assembly (120) and configured to transmit the determined output torque and loss compensation of each of the first and second electric machines (121, 122) to the drive assembly (120).
7. The apparatus of claim 1, wherein the controller (130) comprises:
an operating mode determination module (131) configured to determine an operating mode of the drive assembly (120) based on the target tension and the power ratings of the first and second motors (121, 122), the operating mode comprising: a first mode in which the target tension is applied solely by the first motor (121); a second mode in which the target tension is applied solely by the second motor (122); and a third mode, wherein the target tension is applied by both the first motor (121) and the second motor (122);
a switching parameter determination module (132) configured to determine operating mode switching parameters of the first and second electrical machines (121, 122) based on the operating mode; and
a regulator (133) configured to regulate output torques of the first and second electric machines (121, 122) based on the determined operating mode and the mode switching parameter to enable the drive assembly (120) to be switched into one of the first, second and third modes;
a loss acquisition module (134) configured to acquire a total loss of the drive assembly (120);
a loss profile determination module (135) configured to determine a first loss of the first electric machine (121) and a second loss of the second electric machine (122) based on the total loss value and the rated powers of the first electric machine (121) and the second electric machine (122); and
a loss compensator (136) configured to compensate for respective losses of the first and second electrical machines (121, 122) based on the determined first and second losses;
a receiver (137) coupled to a peripheral (140) and configured to receive a parameter associated with the target tension from the peripheral (140); and
a transmitter (138) coupled to the drive assembly (120) and configured to transmit the determined output torque and loss compensation of each of the first and second electric machines (121, 122) to the drive assembly (120).
8. A method for processing strip material, the method being performed by the apparatus according to any one of claims 1-7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/082508 WO2020206692A1 (en) | 2019-04-12 | 2019-04-12 | Strip machining device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113710600A CN113710600A (en) | 2021-11-26 |
| CN113710600B true CN113710600B (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201980095046.7A Active CN113710600B (en) | 2019-04-12 | 2019-04-12 | Device and method for processing strip |
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| CN (1) | CN113710600B (en) |
| WO (1) | WO2020206692A1 (en) |
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| DE102008042201B4 (en) * | 2007-09-27 | 2023-12-21 | Baumüller Nürnberg GmbH | Electromotive tensioning mechanism and starting methodology for it |
| CN101513966B (en) * | 2009-01-20 | 2012-01-11 | 常州工学院 | Line type winding machine |
| CN201367270Y (en) * | 2009-03-19 | 2009-12-23 | 宁波大学 | Flexible material winding device |
| CN207001806U (en) * | 2017-07-07 | 2018-02-13 | 临安福马装饰材料有限公司 | Printing machine synchronization wrap-up |
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- 2019-04-12 WO PCT/CN2019/082508 patent/WO2020206692A1/en active Application Filing
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| US3061228A (en) * | 1961-03-14 | 1962-10-30 | Eaton Mfg Co | Tension control apparatus |
| JPH09124202A (en) * | 1995-10-31 | 1997-05-13 | Fuji Electric Co Ltd | Control method for rolled material supply device |
| CN202499584U (en) * | 2012-03-23 | 2012-10-24 | 厦门新路嘉工业自动化有限公司 | Unwinding tension control system |
| CN203512898U (en) * | 2013-09-26 | 2014-04-02 | 常州市新创复合材料有限公司 | Double-station constant tension rolling control device of thermoplastic board pre-impregnating belt |
| CN104340864A (en) * | 2014-10-11 | 2015-02-11 | 太原重工股份有限公司 | Crane and hoisting mechanism thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113710600A (en) | 2021-11-26 |
| WO2020206692A1 (en) | 2020-10-15 |
| WO2020206692A8 (en) | 2021-09-23 |
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