CN110919296B - Cold-rolled stainless steel strip demagnetization process - Google Patents
Cold-rolled stainless steel strip demagnetization process Download PDFInfo
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- CN110919296B CN110919296B CN201811093499.XA CN201811093499A CN110919296B CN 110919296 B CN110919296 B CN 110919296B CN 201811093499 A CN201811093499 A CN 201811093499A CN 110919296 B CN110919296 B CN 110919296B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a demagnetization process of a cold-rolled stainless steel strip, which is characterized by comprising the following steps of: the method comprises the following steps: 1) feeding the steel coil to the uncoiling mandrel by the feeding trolley; 2) expanding the mandrel to tension the steel coil, feeding the steel strip into a shearing machine, starting a paper collecting machine, and directly winding the steel strip packing paper on a reel of the paper collecting machine; 3) the uncoiler is inching to enable the tail of the steel plate to enter the shearing machine, then the tail of the steel strip is continuously inching to be sent to the seam welding machine, and then the winding drum is dismounted; 4) the uncoiler and the pinch roll are inching to enable the head of the steel plate to also enter a seam welder, the head and the tail of the two steel strips are welded together, and the steel strips enter the pinch roll behind the welder; 5) and (3) removing dust on the surface of the steel strip and trace moisture on the steel strip by the high-pressure air knife blowing device. The process of the invention can reduce the magnetic permeability of the treated stainless steel to below 1.002 mu, meet the customer requirements of the electronic industry and improve the production economic benefit.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a demagnetization process for a cold-rolled stainless steel strip.
Background
The stainless steel is a non-magnetic stainless steel. However, after cold rolling, some austenite in the structure of SUS316L was transformed into martensite, so that SUS316L was made into magnetic stainless steel and the magnetic permeability μ was 1.4 or more. When the magnetic SUS316L stainless steel is used in mobile phones and electronic products, certain influence is generated on electromagnetic signals. Thus affecting the application of the material in the electronics industry. Therefore, we propose a demagnetization process for the cold-rolled stainless steel strip.
Disclosure of Invention
The invention aims to provide a demagnetizing process for a cold-rolled stainless steel strip, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a demagnetization process of a cold-rolled stainless steel strip is characterized in that: the method comprises the following steps:
1) the steel coil to be demagnetized is hung on a feeding trolley of the uncoiler in a preparation state by a travelling crane, the steel coil is fed onto the uncoiling mandrel by the feeding trolley, and the trolley returns to the original position;
2) the uncoiling mandrel is used for tensioning the steel coil, the uncoiler is inching forwards to send the head of the steel strip of the steel coil into a pinch roll behind the uncoiler through a guide roll of the uncoiler, an upper press roll of the pinch roll is pressed down, the uncoiler and the pinch roll are inching at the same time, the steel strip is sent into a shearing machine, bad parts of the head of the steel strip are cut off, a paper collecting machine is started, and the padding paper of the steel strip is directly wound on a reel of the paper collecting machine;
3) when the steel coil on the working uncoiler is to be in a coil changing state, attention needs to be paid to observing the tail part of the steel strip, when the thickness of the tail part of the steel strip is uneven or irregular, the whole line stops running, a inching mode is adopted, the uncoiler is inched to enable the tail part of the steel strip to enter a shearing machine, the tail part with uneven thickness or irregular is sheared, then the tail part of the steel strip is continuously inched to be sent to a seam welding machine, then a winding drum is dismounted, and a new steel coil is placed on a feeding trolley by a crane;
4) the steel coil is loaded to the production center line position on the mandrel of the uncoiler, the mandrel of the uncoiler is tensioned, a press roller of the uncoiler is pressed down, the uncoiler and the pinch roller are inching to enable the head of the steel plate to also enter the seam welding machine, the heads and the tails of the two steel strips are manually adjusted to proper positions, the seam welding machine is started, the heads and the tails of the two steel strips are welded together, the steel strips enter a pinch roller behind the welding machine, and the inlet section of the production line is placed in a normal operation state;
5) after the steel strip passes through a welding machine, the pinch roll enters a first tension roll, then enters a second tension roll through the first tension roll and enters a high-pressure air knife purging device, and after dust on the surface of the steel strip and trace moisture on the steel strip are removed by a high-pressure air knife, the steel strip enters a degaussing furnace to complete a heat treatment process;
6) heating the steel strip after the heat treatment process in an annealing furnace, preserving heat, then entering a cooling section, cooling the steel strip to below 60 ℃, then reaching a tension measurement steering roller through a furnace outlet, and enabling the steel strip to enter a third tension roller and a fourth tension roller through the tension measurement steering roller;
7) and after the steel belt passes through the fourth tension roller and enters the outlet shearing machine, the steel belt passes through the steering roller and is finally wound by the uncoiler, the production line stops running during uncoiling, a finished product after uncoiling is unloaded from a coiling machine mandrel by the uncoiling trolley, manual packaging is carried out, a travelling crane is lifted away, the finished product is loaded into a sleeve by the upper sleeve device, and a new coiling operation is started.
Preferably, the annealing furnace in the step 6 is a degaussing annealing furnace and an annealing furnace cooling section.
Preferably, the total length of the heating zone of the degaussing annealing furnace is 10 meters, the heating control is carried out in four zones, the temperature of each zone in the furnace is 750 ℃, and the control precision of the furnace temperature is +/-1 ℃.
Preferably, the cooling rate of the steel strip in the cooling section of the annealing furnace is more than 40 ℃/S, and the tension of the steel strip in the cooling section of the annealing furnace is 40N/mm2。
Preferably, the operation of the fourth tension roller in the step 6 is a master speed reference of the whole production line, and the full-line operation speed is controlled.
Preferably, the paper collecting machine and the uncoiler are placed on the same floating platform and can be centered and positioned manually.
Compared with the prior art, the invention has the beneficial effects that: the demagnetization process of the cold-rolled stainless steel strip can perform demagnetization treatment on the cold-rolled SUS316L stainless steel through the whole process flow, so that the treated cold-rolled SUS316L stainless steel can be demagnetized
The magnetic permeability of the SUS316L stainless steel is reduced to below 1.002 mu, so that the effect of meeting the requirements of customers in the electronic industry is achieved, and the effect of improving the production economic benefit is achieved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a demagnetization process of a cold-rolled stainless steel strip is characterized in that: the method comprises the following steps:
1) the steel coil to be demagnetized is hung on a feeding trolley of the uncoiler in a preparation state by a travelling crane, the steel coil is fed onto the uncoiling mandrel by the feeding trolley, and the trolley returns to the original position;
2) the uncoiling mandrel is used for tensioning the steel coil, the uncoiler is inching forwards to send the head of the steel strip of the steel coil into a pinch roll behind the uncoiler through a guide roll of the uncoiler, an upper press roll of the pinch roll is pressed down, the uncoiler and the pinch roll are inching at the same time, the steel strip is sent into a shearing machine, bad parts of the head of the steel strip are cut off, a paper collecting machine is started, and the padding paper of the steel strip is directly wound on a reel of the paper collecting machine;
3) when the steel coil on the working uncoiler is to be in a coil changing state, attention needs to be paid to observing the tail part of the steel strip, when the thickness of the tail part of the steel strip is uneven or irregular, the whole line stops running, a inching mode is adopted, the uncoiler is inched to enable the tail part of the steel strip to enter a shearing machine, the tail part with uneven thickness or irregular is sheared, then the tail part of the steel strip is continuously inched to be sent to a seam welding machine, then a winding drum is dismounted, and a new steel coil is placed on a feeding trolley by a crane;
4) the steel coil is loaded to the production center line position on the mandrel of the uncoiler, the mandrel of the uncoiler is tensioned, a press roller of the uncoiler is pressed down, the uncoiler and the pinch roller are inching to enable the head of the steel plate to also enter the seam welding machine, the heads and the tails of the two steel strips are manually adjusted to proper positions, the seam welding machine is started, the heads and the tails of the two steel strips are welded together, the steel strips enter a pinch roller behind the welding machine, and the inlet section of the production line is placed in a normal operation state;
1) after passing through a welding machine, the steel strip enters a first tension roller through a pinch roller and then enters a second tension roller through the first tension roller
2) The two tension rollers enter a high-pressure air knife blowing device, and after the high-pressure air knife removes dust on the surface of the steel strip and trace moisture on the steel strip, the steel strip enters a degaussing furnace to complete a heat treatment process;
3) the annealing furnace is a demagnetizing annealing furnace and an annealing furnace cooling section, the total length of a heating zone of the demagnetizing annealing furnace is 10 meters, the heating control is carried out in four zones, the temperature of each zone in the furnace is 750 ℃, the furnace temperature control precision is +/-1 ℃, the steel strip is heated in the demagnetizing annealing furnace and enters the annealing furnace cooling section after heat preservation, the cooling rate of the steel strip in the annealing furnace cooling section is more than 40 ℃/S, and the tension of the steel strip in the annealing furnace cooling section is 40N/mm2After the temperature of the steel strip is cooled to be below 60 ℃, the steel strip reaches a tension measurement steering roller through a furnace outlet, the steel strip enters a third tension roller and a fourth tension roller through the tension measurement steering roller, the operation of the fourth tension roller is a main speed reference of the whole production line, and the full-line operation speed is controlled;
4) after the steel band passes through the fourth tension roller and enters the outlet shearing machine, the steel band passes through the steering roller and is finally wound by the uncoiler, the production line stops running during uncoiling, a finished product after uncoiling is unloaded from a coiling machine mandrel by the uncoiling trolley, manual packaging is carried out, a travelling crane is hoisted away, the finished product is loaded into the sleeve by the upper sleeve device, a new coiling operation is started, the paper collecting machine and the uncoiler are placed on the same floating platform, and the constant-tension lining paper can be realized through manual centering and positioning.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A demagnetization process of a cold-rolled stainless steel strip is characterized in that: the method comprises the following steps:
1) the steel coil to be demagnetized is hung on a feeding trolley of the uncoiler in a preparation state by a travelling crane, the steel coil is fed onto the uncoiling mandrel by the feeding trolley, and the trolley returns to the original position;
2) the uncoiling mandrel is used for tensioning the steel coil, the uncoiler is inching forwards to send the head of the steel strip of the steel coil into a pinch roll behind the uncoiler through a guide roll of the uncoiler, an upper press roll of the pinch roll is pressed down, the uncoiler and the pinch roll are inching at the same time, the steel strip is sent into a shearing machine, bad parts of the head of the steel strip are cut off, a paper collecting machine is started, and the padding paper of the steel strip is directly wound on a reel of the paper collecting machine;
3) when the steel coil on the working uncoiler is to be in a coil changing state, attention needs to be paid to observing the tail part of the steel strip, when the thickness of the tail part of the steel strip is uneven or irregular, the whole line stops running, a inching mode is adopted, the uncoiler is inched to enable the tail part of the steel strip to enter a shearing machine, the tail part with uneven thickness or irregular is sheared, then the tail part of the steel strip is continuously inched to be sent to a seam welding machine, then a winding drum is dismounted, and a new steel coil is placed on a feeding trolley by a crane;
4) the steel coil is loaded to the production center line position on the mandrel of the uncoiler, the mandrel of the uncoiler is tensioned, a press roller of the uncoiler is pressed down, the uncoiler and the pinch roller are inching to enable the head of the steel plate to also enter the seam welding machine, the heads and the tails of the two steel strips are manually adjusted to proper positions, the seam welding machine is started, the heads and the tails of the two steel strips are welded together, the steel strips enter a pinch roller behind the welding machine, and the inlet section of the production line is placed in a normal operation state;
5) after the steel strip passes through a welding machine, the pinch roll enters a first tension roll, then enters a second tension roll through the first tension roll and enters a high-pressure air knife purging device, and after dust on the surface of the steel strip and trace moisture on the steel strip are removed by a high-pressure air knife, the steel strip enters a degaussing furnace to complete a heat treatment process;
6) the annealing furnace is a demagnetizing annealing furnace and an annealing furnace cooling section, the total length of a heating zone of the demagnetizing annealing furnace is 10 meters, the heating control is carried out in four zones, the temperature of each zone in the furnace is 750 ℃, the furnace temperature control precision is +/-1 ℃, the steel strip is heated in the demagnetizing annealing furnace and enters the annealing furnace cooling section after heat preservation, the cooling rate of the steel strip in the annealing furnace cooling section is more than 40 ℃/S, and the tension of the steel strip in the annealing furnace cooling section is 40N/mm2After the temperature of the steel strip is cooled to be below 60 ℃, the steel strip reaches a tension measurement steering roller through a furnace outlet, passes through the tension measurement steering roller and enters a third tension roller and a fourth tension roller;
7) and after the steel belt passes through the fourth tension roller and enters the outlet shearing machine, the steel belt passes through the steering roller and is finally wound by the uncoiler, the production line stops running during uncoiling, a finished product after uncoiling is unloaded from a coiling machine mandrel by the uncoiling trolley, manual packaging is carried out, a travelling crane is lifted away, the finished product is loaded into a sleeve by the upper sleeve device, and a new coiling operation is started.
2. The process of claim 1, wherein the demagnetizing process comprises the following steps: and the fourth tension roller in the step 6 operates as a master speed reference of the whole production line, and the full-line operation speed is controlled.
3. The process of claim 1, wherein the demagnetizing process comprises the following steps: the paper collecting machine and the uncoiler are placed on the same floating platform and can be centered and positioned manually.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811093499.XA CN110919296B (en) | 2018-09-19 | 2018-09-19 | Cold-rolled stainless steel strip demagnetization process |
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| CN201811093499.XA CN110919296B (en) | 2018-09-19 | 2018-09-19 | Cold-rolled stainless steel strip demagnetization process |
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| CN110919296A CN110919296A (en) | 2020-03-27 |
| CN110919296B true CN110919296B (en) | 2021-09-07 |
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| CN115611048B (en) * | 2022-11-15 | 2024-02-02 | 江苏甬金金属科技有限公司 | Stainless steel strip unreeling device with automatic storage function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2168626B (en) * | 1984-11-10 | 1987-12-23 | Nippon Steel Corp | Grain-oriented electrical steel sheet having stable magnetic properties resistant to stress-relief annealing, and method and apparatus for producing the same |
| CN102896179A (en) * | 2012-09-24 | 2013-01-30 | 无锡市方正金属捆带有限公司 | Preparation method of stainless steel strip for electronic device shells |
| CN103484647A (en) * | 2013-09-11 | 2014-01-01 | 山东能源机械集团乾元不锈钢制造有限公司 | Production process of low-magnetic stainless steel band |
| CN104043649A (en) * | 2014-06-13 | 2014-09-17 | 无锡华生精密材料股份有限公司 | Production method of low-magnetic-flux stainless steel band |
| CN204748029U (en) * | 2015-05-28 | 2015-11-11 | 佛山市吉力佳机械有限公司 | Stainless steel coiled material combined machining center |
| CN105253674A (en) * | 2015-09-28 | 2016-01-20 | 宁波市岭登电器有限公司 | Steel belt transmission device, and system and method for controlling steel belt transmission device |
-
2018
- 2018-09-19 CN CN201811093499.XA patent/CN110919296B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2168626B (en) * | 1984-11-10 | 1987-12-23 | Nippon Steel Corp | Grain-oriented electrical steel sheet having stable magnetic properties resistant to stress-relief annealing, and method and apparatus for producing the same |
| CN102896179A (en) * | 2012-09-24 | 2013-01-30 | 无锡市方正金属捆带有限公司 | Preparation method of stainless steel strip for electronic device shells |
| CN103484647A (en) * | 2013-09-11 | 2014-01-01 | 山东能源机械集团乾元不锈钢制造有限公司 | Production process of low-magnetic stainless steel band |
| CN104043649A (en) * | 2014-06-13 | 2014-09-17 | 无锡华生精密材料股份有限公司 | Production method of low-magnetic-flux stainless steel band |
| CN204748029U (en) * | 2015-05-28 | 2015-11-11 | 佛山市吉力佳机械有限公司 | Stainless steel coiled material combined machining center |
| CN105253674A (en) * | 2015-09-28 | 2016-01-20 | 宁波市岭登电器有限公司 | Steel belt transmission device, and system and method for controlling steel belt transmission device |
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