CN105417252A - Magnetic field vortex type dynamic tension controller for metal strip - Google Patents
Magnetic field vortex type dynamic tension controller for metal strip Download PDFInfo
- Publication number
- CN105417252A CN105417252A CN201510823975.9A CN201510823975A CN105417252A CN 105417252 A CN105417252 A CN 105417252A CN 201510823975 A CN201510823975 A CN 201510823975A CN 105417252 A CN105417252 A CN 105417252A
- Authority
- CN
- China
- Prior art keywords
- metal strip
- sheet metal
- magnetic field
- magnets
- tension controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
- B65H23/10—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle acting on running web
- B65H23/105—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle acting on running web and controlling web tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/30—Forces; Stresses
- B65H2515/31—Tensile forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/17—Nature of material
- B65H2701/173—Metal
Abstract
The invention relates to a magnetic field vortex type dynamic tension controller for a metal strip. The magnetic field vortex type dynamic tension controller for the metal strip comprises rollers, the metal strip wound on the two adjacent rollers, a plurality of magnets and supports used for fixing the magnets. The magnets and the supports are arranged between the two rollers and symmetrically located at the two sides of the metal strip. The magnets are arranged on the supports, are close to the metal strip and are spaced from the metal strip all the time. The magnetic pole directions of every two adjacent magnets on the same support are opposite. The magnet pole directions of the magnets in the symmetrical positions at the two sides of the metal strip are in correspondence. According to the magnetic field vortex type dynamic tension controller for the metal strip, a traditional mechanical-electrical transmission way is eliminated; backward tension is directly generated in the metal strip through the permanent magnet induction between a magnetic field generated by the permanent magnets and the metal strip so that equipment investment can be reduced, the equipment maintenance workload can be reduced, and the service life is prolonged.
Description
Technical field
The present invention relates to tension control assembly, be specifically related to a kind of sheet metal strip magnetic field eddy current dynamic tension controller.
Background technology
In the continuous processing production process of sheet metal strip, because technique needs, the strap tension that manufacturing line is each section is different.The major equipment of traditional strap tension segmentation is pinch roll and jockey pulley, realizes band Tension Difference before and after roller by the friction force between roll surface and band.Friction between roller and band can cause scuffing to strip surface, affects surface quality; In addition, usual pinch roll is driven by gear motor, and jockey pulley is driven by gear case by variable-frequency motor, and cause running part cost comparatively large, equipment is comparatively complicated, and maintenance workload is larger.
Summary of the invention
The object of the invention is for above-mentioned present situation, provide a kind of contactless, reduce equipment investment, improve the sheet metal strip magnetic field eddy current dynamic tension controller of service life of equipment.
The technical solution used in the present invention: a kind of sheet metal strip magnetic field eddy current dynamic tension controller, comprise roller, be wrapped in the sheet metal strip on two adjacent rollers, the support of some magnets and fixing described some magnets, described some magnets and described support are all located between described two rollers and symmetry is positioned at the both sides of described sheet metal strip, described some magnets are arranged on the bracket and close described sheet metal strip, and all the time and described sheet metal strip interval arrange, the pole orientation of magnet adjacent on same support is contrary, the pole orientation of the magnet of described sheet metal strip bilateral symmetry position is relative.
Effect of the present invention is: broken away from traditional machinery-electric drive mode, electromagnetic induction between the magnetic field produced by permanent magnet and sheet metal strip, directly in sheet metal strip, produce backward pull, can equipment investment be reduced, also can reduce plant maintenance work capacity and improve service life.
Further, when described magnet is electromagnet, described sheet metal strip magnetic field eddy current dynamic tension controller also comprises the electric system of the magnetic-field intensity controlling described some magnets.
Further, when described magnet is permanent magnet, the moving sets that described sheet metal strip magnetic field eddy current dynamic tension controller also comprises hydraulic actuating cylinder, connecting rod and is located on described connecting rod, described hydraulic actuating cylinder, connecting rod and moving sets are all located between described two rollers and symmetry is positioned at the both sides of described sheet metal strip, described support is connected with the piston rod of described hydraulic actuating cylinder by described connecting rod, and described connecting rod is moved by described moving sets.
Further, when the piston rod of described hydraulic actuating cylinder stretches out completely, described magnet still and described sheet metal strip interval arrange.
Further, described support is tabular, and the plane parallel at the plane at described support place and the sheet metal strip place between described two rollers.
Further, described some magnets are uniformly distributed along on the length direction of described sheet metal strip.
Further, described some magnets are uniformly distributed along on the Width of described sheet metal strip.
Further, described sheet metal strip magnetic field eddy current dynamic tension controller also comprises belt pulley and belt, described belt is driven by two belt pulleys, the plane parallel at the plane at the part belt place between these two belt pulleys and the sheet metal strip place between this two roller, the core wheel of described two belt pulleys is fixed at the two ends of described support, the middle part of described support is connected with described connecting rod, and described some magnets are arranged on the outside face of described belt.
Further, described some magnets are uniformly distributed along on the length direction of described belt.
Further, described some magnets are uniformly distributed along on the Width of described belt.
Accompanying drawing explanation
Figure 1 shows that the two-dimensional structure schematic diagram of the sheet metal strip magnetic field eddy current dynamic tension controller that first embodiment of the invention provides.
Figure 2 shows that the two-dimensional structure schematic diagram of the sheet metal strip magnetic field eddy current dynamic tension controller that second embodiment of the invention provides.
Figure 3 shows that principle schematic of the present invention.
In accompanying drawing, the list of parts representated by each label is as follows:
1, roller, 2, sheet metal strip, 3, permanent magnet, 4, support, 4 ', support, 5, hydraulic actuating cylinder, 6, connecting rod, 7, moving sets, 8, belt pulley, 9, belt.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Refer to Fig. 1, be the two-dimensional structure schematic diagram of the sheet metal strip magnetic field eddy current dynamic tension controller that first embodiment of the invention provides, this first embodiment is described for permanent magnet.This sheet metal strip magnetic field eddy current dynamic tension controller comprises two rollers 1, the sheet metal strip 2 be wrapped on these two rollers 1, some permanent magnets 3, the support 4 fixing this some permanent magnet 3, hydraulic actuating cylinder 5, connecting rod 6 and the moving sets 7 be located on connecting rod 6.This some permanent magnet 3, support 4, hydraulic actuating cylinder 5, connecting rod 6 and moving sets 7 symmetry are located at the both sides of sheet metal strip 2.Sheet metal strip 2 runs along the direction of arrow in Fig. 1.
Roller 1 is in cylinder, and it is peripheral that sheet metal strip 2 is wrapped in these two rollers 1.In the present embodiment, the angle that sheet metal strip 2 is wound around these two rollers 1 is 90 degree.
Because this some permanent magnet 3, support 4, hydraulic actuating cylinder 5, connecting rod 6 and moving sets 7 symmetry are located at the both sides of sheet metal strip 2, be described with the side of sheet metal strip 2 below.
Support 4 is in tabular, and the plane parallel at the plane at support 4 place and sheet metal strip 2 place between two rollers 1.
This some permanent magnet 3 is arranged on the surface of support 4 near sheet metal strip 2.This some permanent magnet 3 is uniformly distributed along on the length direction of sheet metal strip 2, and is uniformly distributed along on the Width of sheet metal strip 2, thus makes this some permanent magnet 3 form equidistant array.The pole orientation of adjacent permanent magnet 3 is contrary.
Support 4 is connected with the piston rod of hydraulic actuating cylinder 5 by connecting rod 6, connecting rod 6 can up-and-down movement by moving sets 7, when the piston rod of hydraulic actuating cylinder 5 stretches out completely, this some permanent magnet 3 still and sheet metal strip 2 interval arrange, and now the distance of each permanent magnet 3 to sheet metal strip 2 is all identical.In the present embodiment, hydraulic actuating cylinder 5 is middle oscillating type.
Please refer to Fig. 3, it is schematic diagram of the present invention.For convenience of description, reference frame is set up.If the upper surface of sheet metal strip 2 is XY plane, sheet metal strip 2 service direction is X-axis forward, and Y-axis is vertical with sheet metal strip 2 sense of motion, and Z-direction is pointed to above sheet metal strip 2.
Sheet metal strip 2 runs to the right along arrow direction, and the surface (single or double) of sheet metal strip 2 has Distribution of Magnetic Field and this magnetic field is fixed.Owing to there is speed of relative movement between this magnetic field and sheet metal strip 2, and the speed of relative movement between magnetic field and sheet metal strip 2 is X-direction, according to Mx's theory of electromagnetic field and faradic surface action, due to sheet metal strip 2 cutting magnetic field, therefore in the superficial layer generation vortex flow as shown in Figure 3 of sheet metal strip 2, density of current is
Electric current is subject to Ampere force effect in magnetic field
F＝∫
vJ×BdV
Wherein, H-magnetic-field intensity, B-magnetic induction density, μ-permeability.
Inductive current direction follows right-hand rule, and ampere force direction follows left hand rule.Regardless of the pole orientation of permanent magnet 3, the direction of Ampere force is contrary with the sense of motion of sheet metal strip 2 all the time.Particularly, the intensity in magnetic field is larger, and the tension force produced in sheet metal strip 2 is larger; Within the specific limits, the tension force produced in sheet metal strip 2 and magnetic field running velocity positive correlation; When not needing tension force to control, magnetic field can be excised fast.
During concrete enforcement, when sheet metal strip 2 runs, if desired for sheet metal strip 2 provides backward pull, then the piston rod of the hydraulic actuating cylinder 5 of sheet metal strip magnetic field eddy current dynamic tension controller is stretched out, make this some permanent magnet 3 close with sheet metal strip 2, and permanent magnet 3 is nearer with the distance of sheet metal strip 2, magnetic-field intensity is larger, and the backward pull produced in sheet metal strip 2 is larger; When not needing backward pull, the rod chamber oil-feed of hydraulic actuating cylinder 5, piston rod is regained, and permanent magnet 3 is away from sheet metal strip 2, and the electric current produced in sheet metal strip due to now permanent magnet 3 is very little, negligible, therefore can think that backward pull excises.
Understandably, this sheet metal strip magnetic field eddy current dynamic tension controller also comprises hydraulic efficiency pressure system (not shown) and automation control system (not shown), this automation control system drives this hydraulic efficiency pressure system to adjust the overhang of the piston rod of hydraulic actuating cylinder 5, namely control the distance of some permanent magnets 3 and sheet metal strip 2, and then control the size of backward pull in sheet metal strip 2.
So, sheet metal strip magnetic field provided by the invention eddy current dynamic tension controller belongs to non-contact tension and controls, with low cost, and traditional machinery-electric actuator can be replaced to provide backward pull for operating sheet metal strip; Decrease transmission link, efficiency is high, and energy-saving effect is remarkable; Without wearing and tearing, noiselessness, reliable operation.
Refer to Fig. 2, be the two-dimensional structure schematic diagram of the sheet metal strip magnetic field eddy current dynamic tension controller that second embodiment of the invention provides, this second embodiment is also described for permanent magnet, and its principle is identical with the first embodiment.This sheet metal strip magnetic field eddy current dynamic tension controller comprises two rollers 1, sheet metal strip 2, some permanent magnets 3, the support 4 ' fixing this some permanent magnet 3, hydraulic actuating cylinder 5, connecting rod 6, the moving sets 7 be located on connecting rod 6, belt pulley 8 and the belt 9 be wrapped on these two rollers 1.This some permanent magnet 3, support 4, hydraulic actuating cylinder 5, connecting rod 6, moving sets 7, belt pulley 8 and belt 9 symmetry are located at the both sides of sheet metal strip 2.Sheet metal strip 2 runs along the direction of arrow in Fig. 2.
Roller 1 is in cylinder, and it is peripheral that sheet metal strip 2 is wrapped in these two rollers 1.In the present embodiment, the angle that sheet metal strip 2 is wound around these two rollers 1 is 90 degree.
Because this some permanent magnet 3, support 4 ', hydraulic actuating cylinder 5, connecting rod 6, moving sets 7, belt pulley 8 and belt 9 symmetry are located at the both sides of sheet metal strip 2, be described with the side of sheet metal strip 2 below.
These two belt pulley 8 horizontal positioned, belt 9 is driven by these two belt pulleys 8, and the plane parallel at the plane at part belt 9 place between these two belt pulleys 8 and sheet metal strip 2 place between this two roller 1.Belt pulley 8 is driven by actuating device (not shown).
This some permanent magnet 3 is arranged on the outside face of belt 9.This some permanent magnet 3 is uniformly distributed along on the length direction of belt 9, and is uniformly distributed along on the Width of belt 9.The pole orientation of adjacent permanent magnet 3 is contrary.
The core wheel of these two belt pulleys 8 is fixed at the two ends of support 4 ', and the middle part of support 4 ' is connected with connecting rod 6.Support 4 ' is connected by the piston rod of connecting rod 6 with hydraulic actuating cylinder 5, and connecting rod 6 can up-and-down movement by moving sets 7, when the piston rod of hydraulic actuating cylinder 5 stretches out completely, this some permanent magnet 3 still and sheet metal strip 2 interval arrange.In the present embodiment, hydraulic actuating cylinder 5 is middle oscillating type.
Understandably, this sheet metal strip magnetic field eddy current dynamic tension controller also comprises hydraulic efficiency pressure system (not shown) and automation control system (not shown), this automation control system drives this hydraulic efficiency pressure system to adjust the overhang of the piston rod of hydraulic actuating cylinder 5, namely control the distance of some permanent magnets 3 and sheet metal strip 2, and then control the size of backward pull in sheet metal strip 2.
During concrete enforcement: when sheet metal strip 2 runs, if desired sheet metal strip 2 provides forward pull, then the piston rod of the hydraulic actuating cylinder 5 of sheet metal strip about 2 synchronously stretches out, this automation control system is according to the final position of required forward pull control plunger bar, namely required forward pull is larger, and piston rod stretches out more.Then this automation control system drive pulley presses the rotation of direction shown in Fig. 2, the speed that this some permanent magnet 3 is sentenced higher than sheet metal strip 2 kinematic velocity at the surperficial certain distance of sheet metal strip 2 is moved, belt pulley 8 rotating speed is higher, and the forward pull produced in sheet metal strip 2 is larger.This automation control system can calculate the final position of the piston rod of hydraulic actuating cylinder 5 and the rotating speed of belt pulley 8 automatically.
On the contrary, when sheet metal strip 2 runs, if desired sheet metal strip 2 provides backward pull, then the piston rod of the hydraulic actuating cylinder 5 of sheet metal strip about 2 synchronously stretches out, and automation control system is according to the final position of required backward pull control plunger bar.Required backward pull is larger, and piston rod stretches out more.Then this automation control system drive pulley rotates by diagram opposite sense, this some permanent magnet 3 is made to do the motion contrary with sheet metal strip 2 sense of motion in the surperficial a distance of sheet metal strip 2, belt pulley 8 rotating speed is higher, and the backward pull produced in sheet metal strip 2 is larger.According to setting, this automation control system calculates the final position of piston rod and the rotating speed of belt pulley 2 automatically.
When not needing backward pull, the rod chamber oil-feed of hydraulic actuating cylinder 5, piston rod is regained, and permanent magnet 3 is away from sheet metal strip 2, and the electric current produced in sheet metal strip due to now permanent magnet 3 is very little, negligible, therefore can think that backward pull excises.
So, sheet metal strip magnetic field provided by the invention eddy current dynamic tension controller belongs to non-contact tension and controls, with low cost, and traditional machinery-electric actuator can be replaced to provide backward pull for operating sheet metal strip; Decrease transmission link, efficiency is high, and energy-saving effect is remarkable; Without wearing and tearing, noiselessness, reliable operation.
Understandably, the angle that sheet metal strip 2 is wound around roller 1 does not limit, for other is arbitrarily angled.And the type of magnet does not also limit, can be permanent magnet and also can be electromagnet, when magnet is electromagnet, this sheet metal strip magnetic field eddy current dynamic tension controller also comprises the electric system of the magnetic-field intensity controlling this some electromagnet.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a sheet metal strip magnetic field eddy current dynamic tension controller, it is characterized in that, comprise roller (1), be wrapped in the sheet metal strip (2) on adjacent two rollers (1), the support of some magnets (3) and fixing described some magnets (3), described some magnets (3) and described support are all located between described two rollers (1) and symmetry is positioned at the both sides of described sheet metal strip (2), described some magnets (3) are arranged on the bracket and close described sheet metal strip (2), and all the time and described sheet metal strip (2) interval arrange, the pole orientation of magnet (3) adjacent on same support is contrary, the pole orientation of the magnet (3) of described sheet metal strip (2) bilateral symmetry position is relative.
2. sheet metal strip magnetic field as claimed in claim 1 eddy current dynamic tension controller, it is characterized in that: when described magnet (3) is for electromagnet, described sheet metal strip magnetic field eddy current dynamic tension controller also comprises the electric system of the magnetic-field intensity controlling described some magnets (3).
3. sheet metal strip magnetic field as claimed in claim 1 eddy current dynamic tension controller, it is characterized in that: when described magnet (3) is for permanent magnet, described sheet metal strip magnetic field eddy current dynamic tension controller also comprises hydraulic actuating cylinder (5), connecting rod (6) and the moving sets (7) be located on described connecting rod (6), described hydraulic actuating cylinder (5), connecting rod (6) and moving sets (7) are all located between described two rollers (1) and symmetry is positioned at the both sides of described sheet metal strip (2), described support is connected with the piston rod of described hydraulic actuating cylinder (5) by described connecting rod (6), described connecting rod (6) is moved by described moving sets (7).
4. sheet metal strip magnetic field as claimed in claim 3 eddy current dynamic tension controller, it is characterized in that: when the piston rod of described hydraulic actuating cylinder (5) stretches out completely, described magnet (3) still and described sheet metal strip (2) interval arrange.
5. sheet metal strip magnetic field as claimed in claim 4 eddy current dynamic tension controller, it is characterized in that: described support is tabular, and the plane at described support place and be positioned at the plane parallel at sheet metal strip (2) place between described two rollers (1).
6. sheet metal strip magnetic field as claimed in claim 5 eddy current dynamic tension controller, is characterized in that: described some magnets (3) are uniformly distributed along on the length direction of described sheet metal strip (2).
7. sheet metal strip magnetic field as claimed in claim 6 eddy current dynamic tension controller, is characterized in that: described some magnets (3) are uniformly distributed along on the Width of described sheet metal strip (2).
8. sheet metal strip magnetic field as claimed in claim 4 eddy current dynamic tension controller, it is characterized in that: described sheet metal strip magnetic field eddy current dynamic tension controller also comprises belt pulley (8) and belt (9), described belt (9) is driven by two belt pulleys (8), be positioned at the plane at part belt (9) place between these two belt pulleys (8) and be positioned at the plane parallel at sheet metal strip (2) place between this two roller (1), the core wheel of described two belt pulleys (8) is fixed at the two ends of described support, the middle part of described support is connected with described connecting rod (6), described some magnets (3) are arranged on the outside face of described belt (9).
9. sheet metal strip magnetic field as claimed in claim 8 eddy current dynamic tension controller, is characterized in that: described some magnets (3) are uniformly distributed along on the length direction of described belt (9).
10. sheet metal strip magnetic field as claimed in claim 9 eddy current dynamic tension controller, is characterized in that: described some magnets (3) are uniformly distributed along on the Width of described belt (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510823975.9A CN105417252A (en) | 2015-11-24 | 2015-11-24 | Magnetic field vortex type dynamic tension controller for metal strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510823975.9A CN105417252A (en) | 2015-11-24 | 2015-11-24 | Magnetic field vortex type dynamic tension controller for metal strip |
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| Publication Number | Publication Date |
|---|---|
| CN105417252A true CN105417252A (en) | 2016-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510823975.9A Pending CN105417252A (en) | 2015-11-24 | 2015-11-24 | Magnetic field vortex type dynamic tension controller for metal strip |
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| CN (1) | CN105417252A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106672701A (en) * | 2017-01-03 | 2017-05-17 | 王玲燕 | Yarn passing guide method |
| CN107398102A (en) * | 2016-03-25 | 2017-11-28 | 何磊 | A kind of sewage pre-treatment device |
| CN112941276A (en) * | 2021-01-26 | 2021-06-11 | 安泰科技股份有限公司 | Constant-temperature constant-tension magnetic field annealing device for amorphous nanocrystalline alloy strip |
| CN113620103A (en) * | 2021-08-11 | 2021-11-09 | 江西铜博科技有限公司 | A cut device for copper foil production |
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| US4915318A (en) * | 1985-09-26 | 1990-04-10 | John Lysaght (Australia) Limited | Electromagnetic drag mechanisms for ferrous strip |
| CN1190361A (en) * | 1995-07-06 | 1998-08-12 | 泰森磁技术有限公司 | Device for braking electrically conducting strips |
| CN2336890Y (en) * | 1998-06-16 | 1999-09-08 | 冶金工业部钢铁研究总院 | Winding-up device with thin band and iron core |
| DE102006054383A1 (en) * | 2006-11-17 | 2008-05-21 | Sms Demag Ag | Metallic goods i.e. steel band, extracting or braking device operating method, involves controlling distance of goods relative to reference position and position of hauling devices such that goods remain in reference position |
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|---|---|---|---|---|
| GB1147788A (en) * | 1965-06-25 | 1969-04-10 | Const Mecaniques De Creil Sa | A method and apparatus for braking strip winding machines |
| DE2731751A1 (en) * | 1977-07-14 | 1979-01-25 | Philips Patentverwaltung | Suppressing metal strip vibration creating noise - using magnets to damp vibration during strip travel into stamping press |
| US4915318A (en) * | 1985-09-26 | 1990-04-10 | John Lysaght (Australia) Limited | Electromagnetic drag mechanisms for ferrous strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398102A (en) * | 2016-03-25 | 2017-11-28 | 何磊 | A kind of sewage pre-treatment device |
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| CN112941276A (en) * | 2021-01-26 | 2021-06-11 | 安泰科技股份有限公司 | Constant-temperature constant-tension magnetic field annealing device for amorphous nanocrystalline alloy strip |
| CN112941276B (en) * | 2021-01-26 | 2022-06-10 | 安泰科技股份有限公司 | Constant-temperature constant-tension magnetic field annealing device for amorphous nanocrystalline alloy strip |
| CN113620103A (en) * | 2021-08-11 | 2021-11-09 | 江西铜博科技有限公司 | A cut device for copper foil production |
| CN113620103B (en) * | 2021-08-11 | 2023-01-13 | 江西铜博科技有限公司 | A cut device for copper foil production |
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Application publication date: 20160323 |