CN112742884A - Multistage drawing method of bendable flexible zinc-clad steel lightning protection grounding wire - Google Patents
Multistage drawing method of bendable flexible zinc-clad steel lightning protection grounding wire Download PDFInfo
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- CN112742884A CN112742884A CN202011483800.5A CN202011483800A CN112742884A CN 112742884 A CN112742884 A CN 112742884A CN 202011483800 A CN202011483800 A CN 202011483800A CN 112742884 A CN112742884 A CN 112742884A
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- zinc
- coated steel
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- grounding wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/04—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C19/00—Devices for straightening wire or like work combined with or specially adapted for use in connection with drawing or winding machines or apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention provides a multistage drawing method of a bendable flexible zinc-clad steel lightning protection grounding wire, which comprises the following steps: heating and insulating zinc-coated steel, then straightening, and carrying out multi-stage drawing on the straightened zinc-coated steel to obtain the zinc-coated steel; the cross-sectional area reduction ratio of the zinc layer of the zinc-coated steel after drawing is more than 35%. The multistage drawing method of the bendable flexible zinc-clad steel lightning protection grounding wire enables a crystal structure of zinc to be changed from a flaky crystal structure to a refined granular crystal structure, improves the bonding force among atoms, thereby achieving the purpose of changing the physical characteristics of zinc, changing the arrangement structure of metal crystals, enabling the metal crystals to have certain ductility, enabling a surface zinc layer not to crack or peel when a zinc-clad steel product is bent in construction, and realizing 90-degree bending in a turning radius of which the diameter is 20 times of the zinc-clad steel product.
Description
Technical Field
The invention belongs to the field of lightning protection grounding engineering construction, and particularly relates to a multistage drawing method of a bendable flexible zinc-clad steel lightning protection grounding wire.
Background
At present, the lightning protection grounding system is mainly constructed by copper-clad steel and zinc-clad steel (zinc-clad steel and zinc-based alloy steel), when the zinc-clad steel (zinc-clad steel and zinc-based alloy steel) is adopted as a grounding wire, because the zinc is brittle in physical property and lacks ductility, the zinc-clad steel product is often turned due to construction requirements in the construction process of the zinc-clad steel product, so that when the zinc-clad steel grounding wire is bent, the zinc layer of the zinc-clad steel product cracks or peels off, the corrosion resistance of the zinc-clad steel grounding wire product is influenced, and the use safety of the whole lightning protection grounding system is further influenced.
Disclosure of Invention
In view of the above, the invention provides a multistage drawing method of a bendable flexible zinc-clad steel lightning protection grounding wire, aiming at overcoming the defects in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a multi-stage drawing method of a bendable flexible zinc-clad steel lightning protection grounding wire comprises the following steps: heating and insulating zinc-coated steel, then straightening, and carrying out multi-stage drawing on the straightened zinc-coated steel to obtain the zinc-coated steel;
the cross-sectional area reduction ratio of the zinc layer of the zinc-coated steel after drawing is more than 35%.
The reduction ratio of the cross-sectional area (%) (cross-sectional area of original zinc layer-cross-sectional area of reduced zinc layer)/cross-sectional area of original zinc layer%
Further, the heating temperature is 200-300 ℃, and the time is 10-30 minutes.
Further, the time of the heat preservation step is 10-20 minutes; the temperature of the heat preservation step is 200-300 ℃, and the environmental temperature after heat preservation and furnace discharge is more than 30 ℃. The production environment temperature after the heat preservation step is more than 30 ℃, and the heated zinc-coated steel material is prevented from being cooled rapidly. The heat preservation step ensures that the surface zinc layer does not crack or peel off when the coiled product is straightened.
Further, the surface temperature of the zinc-coated steel is more than or equal to 120 ℃ in the drawing process. The surface temperature of the open-loop zinc-coated steel is required to be more than or equal to 120 ℃, and the drawing can be realized, if the surface temperature is lower than the temperature, the drawn product has defects, because the product crystallization temperature is low, the product crystallization does not completely influence the product bending performance.
Further, the time between the completion of the heat preservation step and the completion of the drawing step is 10-15 minutes.
Furthermore, the deformation of the zinc-coated steel after each stage of drawing is 2.5-10%; preferably, the deformation amount of the zinc-coated steel after the drawing of each stage is finished is 2.8-5%. The number of the die sets is related to the deformation of the zinc layer on the surface of the zinc-coated steel, and the deformation of the product is more than 35% to ensure that the zinc layer on the bending surface of the product does not crack after the product is drawn. The increment and decrement of the aperture of the die cannot be too large, if the increment and decrement of the aperture of the die are too large, higher requirements on the power of a drawing machine are provided, and meanwhile, the too large change of the aperture of a single pass can break steel in the zinc-coated steel inner core or increase the hardness of the steel, so that subsequent products are not bent easily.
Furthermore, lubricating oil is added when the zinc-coated steel in the drawing step passes through a drawing die, and the viscosity index of the lubricating oil is 68-150. The lubricating oil keeps the die in a lubricating degree all the time, ensures that a zinc layer does not peel off when the zinc-coated steel product passes through the drawing die, and ensures that the drawn product is bright.
A bendable zinc-coated steel lightning protection grounding wire is prepared by heating zinc-coated steel, then preserving heat, and then performing multi-stage drawing.
A production line of a bendable zinc-coated steel lightning-protection grounding wire comprises an industrial oven, a take-up device, a straightening roller set, a multi-stage die combination and an inverted wire drawing machine which are sequentially arranged.
The use method of the production line of the bendable zinc-clad steel lightning protection grounding wire comprises the following steps: putting the zinc-coated steel into the industrial oven for heating and heat preservation, then primarily aligning the head of the zinc-coated steel through a rail to a take-up device, then sequentially passing through the alignment roller set and the multi-stage die set to be fixed to an inverted wire drawing machine, fastening the alignment roller set, starting a motor to drive the inverted wire drawing machine to rotate, driving the zinc-coated steel to rotate from the take-up device for drawing, adding a lubricant to the multi-stage die set, and then taking up and finishing through the inverted wire drawing machine.
The heated zinc-coated steel product is drawn by a multistage die on an inverted wire drawing machine through an industrial oven, and the zinc-coated steel product is converted from a sheet structure to a particle structure through drawing, so that the interatomic binding force is improved, and the method for improving the physical performance of zinc is achieved.
Compared with the prior art, the invention has the following advantages:
the multistage drawing method of the bendable flexible zinc-clad steel lightning protection grounding wire enables a crystal structure of zinc to be changed from a flaky crystal structure to a refined granular crystal structure, improves the bonding force among atoms, thereby achieving the purpose of changing the physical characteristics of zinc, changing the arrangement structure of metal crystals, enabling the metal crystals to have certain ductility, enabling a surface zinc layer not to crack or peel when a zinc-clad steel product is bent in construction, and realizing 90-degree bending in a turning radius of which the diameter is 20 times of the zinc-clad steel product.
The multistage drawing method of the bendable flexible zinc-clad steel lightning-protection grounding wire can effectively avoid the problem that the product is cracked when a coiled zinc-clad steel product is uncoiled and aligned, thereby improving the comprehensive utilization rate of the zinc-clad steel lightning-protection grounding product, solving the problems that the conventional thick zinc layer (the thickness of the zinc layer is more than or equal to 1MM) cannot be supplied in a coiled manner and only 6-9 meters can be supplied per unit, reducing 10 network welding joints of the zinc-clad steel lightning-protection grounding wire per hundred meters due to the fact that the zinc-clad steel lightning-protection grounding wire can be supplied in a coiled manner, reducing the welding cost of each joint by 25 yuan, saving 250 yuan per hundred meters, generally needing 10-20 minutes due to welding one joint, directly reducing hot-melt welding joints after being supplied in a coiled manner, and greatly improving the construction efficiency; meanwhile, the problem of cracking of the coil zinc layer due to ring opening is solved, and the problems of re-welding and waste of the grounding wire due to the fact that the grounding wire is cut off again due to cracking of the zinc layer occasionally can be solved when the zinc layer is thin (the thickness of the zinc layer is less than 1 mm). Therefore, the invention has stronger practicability and economic value.
Drawings
Fig. 1 is a schematic view of a production line of a bendable zinc-clad steel lightning protection grounding wire according to an embodiment of the invention.
FIG. 2 is a schematic view of a conventional zinc-clad steel lightning protection grounding wire after being bent;
fig. 3 is a schematic view of the bendable zinc-clad steel lightning protection grounding wire according to the embodiment of the invention after being bent.
Description of reference numerals:
1. an industrial oven; 2. a take-up device; 3. straightening the roller group; 4. straightening the roller group; 5. a motor; 6. an inverted wire drawing machine.
Detailed Description
Unless defined otherwise, technical terms used in the following examples have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.
The present invention will be described in detail with reference to examples.
Example 1
The final product specification was required to be phi 16-A3 (i.e. total diameter 16mm, zinc layer thickness 3mm, steel core diameter 10 mm).
The material requirement before processing is phi 20.8mm-A3.9, and the aim is to control the change ratio of the sectional area of the zinc-coated steel product to be 35-45% through a drawing process, and the aim of changing the molecular structure of zinc can be finally achieved only when the deformation ratio is achieved.
A multi-stage drawing method of a bendable flexible zinc-clad steel lightning protection grounding wire comprises the following steps: selecting 100 meters phi 20.8mm-A3.9, heating the product in an industrial tempering furnace for 30 minutes, preserving heat for 10 minutes, setting the temperature at 300 ℃, taking the product out of the tempering furnace after 40 minutes, moving the product to a take-up device (heating in an industrial oven, the main working principle is that the product is prevented from being cracked and peeled off when being straightened) to weld a head with a reinforcing steel bar with the diameter of 16 (the length of the reinforcing steel bar with phi 16 is more than the length from a straightening roller group to an inverted wire drawing machine), wherein the welding aims to enable the product to pass through a die, the head can be fixed on the inverted wire drawing machine, the product passes through the straightening roller group once, the No. 1 die is 19.5mm, the No. 2 die is 19mm, the No. 3 die is 18.5mm, the No. 4 die is 18mm (the distance between every two dies is 150mm), fixing the head to the disc of the inverted wire drawing machine, setting the rotating speed of the inverted wire drawing machine to 10m per minute, and screwing the straightening roller set, starting a machine to run, adding a lubricant at the die, keeping the die lubricated all the time, finishing the preposing step within 1-10 minutes after the coiling is finished, replacing the die, and drawing again until the diameter of the product is drawn to 16 mm. The surface appearance of the drawn product is smooth and bright, and the change ratio of the sectional area of the product is controlled to be 40.83%.
A bendable zinc-coated steel lightning protection grounding wire is prepared by heating zinc-coated steel, then preserving heat, and then performing multi-stage drawing.
A production line of a bendable zinc-coated steel lightning-protection grounding wire comprises an industrial oven 1, a take-up device 2, a straightening roller group 3, a multi-stage die combination 4 and an inverted wire drawing machine 6 which are sequentially arranged.
The use method of the production line of the bendable zinc-clad steel lightning protection grounding wire comprises the following steps: the zinc-coated steel is placed into the industrial oven 1 to be heated and insulated, then the head of the zinc-coated steel is preliminarily straightened from the rail to the take-up device 2, then the zinc-coated steel sequentially passes through the straightening roller set 3 and the multi-stage die assembly 4 to be fixed to the inverted wire drawing machine 6, the straightening roller set is fastened, the motor 5 is started to drive the inverted wire drawing machine 6 to rotate, the zinc-coated steel is driven to rotate from the take-up device to be drawn, the lubricant is added to the multi-stage die assembly 5, and then the zinc-coated steel is taken up and finished by the inverted wire drawing machine 6.
Example 2
The final product specification was required to be Φ 14-a1 (i.e. total diameter 14mm, zinc layer thickness 1mm, steel core diameter 12 mm).
Material requirement before processing: phi 18.2mm-A1.3, aiming at controlling the change ratio of the sectional area of the zinc-coated steel product to be 35-45% through a drawing process, and finally achieving the aim of changing the molecular structure of zinc only when the deformation ratio is achieved.
A multi-stage drawing method of a bendable flexible zinc-clad steel lightning protection grounding wire comprises the following steps: selecting 100 meters phi 18.2mm-A1.3, heating the product in an industrial tempering furnace for 25 minutes, preserving heat for 10 minutes, setting the temperature at 280 ℃, taking the product out of the industrial oven after 40 minutes, moving the product to a take-up device (heating in a tempering furnace, the main working principle of the take-up device is that the product is prevented from being cracked and peeled off in the straightening process) and welding a head part with a reinforcing steel bar with the diameter of 14 (the length of the reinforcing steel bar with phi 14 is more than the length from a straightening roller group to an inverted wire drawing machine), wherein the welding aims to enable the product to pass through a die, the head part can be fixed on the inverted wire drawing machine, the product passes through the straightening roller group once, the No. 1 die is 17.5mm, the No. 2 die is 17mm, the No. 3 die is 16.5mm, the No. 4 die is 16mm (the distance between every two dies is 150mm), fixing the head part to the disc of the inverted wire drawing machine, setting the rotating speed of the inverted wire drawing machine at 10m per, and screwing the straightening roller set, starting a machine to run, starting adding of the lubricant at the die, keeping the die lubricated all the time, finishing the preposing step within 1-10 minutes after the coiling is finished, and replacing the die until the diameter of the product is drawn to 14 mm. The surface appearance of the drawn product is smooth and bright, and the change ratio of the sectional area of the product is controlled to be 41.03 percent.
A production line of a bendable zinc-coated steel lightning-protection grounding wire comprises an industrial oven 1, a take-up device 2, a straightening roller group 3, a multi-stage die combination 4 and an inverted wire drawing machine 6 which are sequentially arranged.
The use method of the production line of the bendable zinc-clad steel lightning protection grounding wire comprises the following steps: the zinc-coated steel is placed into the industrial oven 1 to be heated and insulated, then the head of the zinc-coated steel is preliminarily straightened from the rail to the take-up device 2, then the zinc-coated steel sequentially passes through the straightening roller set 3 and the multi-stage die assembly 4 to be fixed to the inverted wire drawing machine 6, the straightening roller set is fastened, the motor 5 is started to drive the inverted wire drawing machine 6 to rotate, the zinc-coated steel is driven to rotate from the take-up device to be drawn, the lubricant is added to the multi-stage die assembly 5, and then the zinc-coated steel is taken up and finished by the inverted wire drawing machine 6.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A multistage drawing method of a bendable flexible zinc-clad steel lightning protection grounding wire is characterized by comprising the following steps: the method comprises the following steps: heating and insulating zinc-coated steel, then straightening, and carrying out multi-stage drawing on the straightened zinc-coated steel to obtain the zinc-coated steel;
the cross-sectional area reduction ratio of the zinc layer of the zinc-coated steel after drawing is more than 35%.
2. The multi-stage drawing method of the bendable flexible zinc-clad steel lightning protection grounding wire according to claim 1, characterized in that: the heating temperature is 200-300 ℃, and the time is 10-30 minutes.
3. The multi-stage drawing method of the bendable flexible zinc-clad steel lightning protection grounding wire according to claim 1, characterized in that: the time of the heat preservation step is 10-20 minutes; the temperature of the heat preservation step is 200-300 ℃, and the environment temperature of the furnace after heat preservation is more than 30 ℃.
4. The multi-stage drawing method of the bendable flexible zinc-clad steel lightning protection grounding wire according to claim 1, characterized in that: the surface temperature of the zinc-coated steel is more than or equal to 120 ℃ in the drawing process.
5. The multi-stage drawing method of the bendable flexible zinc-clad steel lightning protection grounding wire according to claim 1, characterized by comprising the following steps: the time between the completion of the heat preservation step and the completion of the drawing step is 10-15 minutes.
6. The multi-stage drawing method of the bendable flexible zinc-clad steel lightning protection grounding wire according to claim 1, characterized by comprising the following steps: the deformation amount of the zinc-coated steel after each stage of drawing is 2.5-10%; preferably, the deformation of the zinc-coated steel after the completion of each stage of drawing is 2.8-5%.
7. The multi-stage drawing method of the bendable flexible zinc-clad steel lightning protection grounding wire according to claim 1, characterized in that: and lubricating oil is added when the zinc-coated steel in the drawing step passes through a drawing die, and the viscosity index of the lubricating oil is 68-150.
8. The utility model provides a can bend zinc package steel lightning protection earth connection which characterized in that: the grounding wire is prepared by heating zinc-coated steel, then preserving heat and then performing multi-stage drawing.
9. The utility model provides a production line of zinc package steel lightning protection earth connection can bend which characterized in that: comprises an industrial oven, a take-up device, a straightening roller set, a multi-stage die combination and an inverted wire drawing machine which are arranged in sequence.
10. The use method of the production line of the bendable zinc-clad steel lightning protection grounding wire as claimed in claim 9, is characterized in that: the method comprises the following steps: putting the zinc-coated steel into the industrial oven for heating and heat preservation, then primarily aligning the head of the zinc-coated steel through a rail to a take-up device, then sequentially passing through the alignment roller set and the multi-stage die set to be fixed to an inverted wire drawing machine, fastening the alignment roller set, starting a motor to drive the inverted wire drawing machine to rotate, driving the zinc-coated steel to rotate from the take-up device for drawing, adding a lubricant to the multi-stage die set, and then taking up and finishing through the inverted wire drawing machine.
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| CN202011483800.5A CN112742884B (en) | 2020-12-16 | 2020-12-16 | Multistage drawing method of bendable flexible zinc-clad steel lightning protection grounding wire |
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| CN202011483800.5A CN112742884B (en) | 2020-12-16 | 2020-12-16 | Multistage drawing method of bendable flexible zinc-clad steel lightning protection grounding wire |
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| CN112742884B CN112742884B (en) | 2022-08-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202479244U (en) * | 2012-02-17 | 2012-10-10 | 东莞市科力钢铁线材有限公司 | Inverted type wire drawing machine |
| CN103440928A (en) * | 2013-08-15 | 2013-12-11 | 王玉凯 | Consecutive wrapping welding drawing production line for railway subgrade through ground wires |
| CN107742555A (en) * | 2017-11-16 | 2018-02-27 | 济南瑞通铁路电务有限责任公司 | A kind of rolling drawing production line and production technology for alloy sleeve Through ground wire |
| CN109500129A (en) * | 2018-12-27 | 2019-03-22 | 河南通达电缆股份有限公司 | A kind of manufacturing method of multipurpose zinc Baogang |
-
2020
- 2020-12-16 CN CN202011483800.5A patent/CN112742884B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202479244U (en) * | 2012-02-17 | 2012-10-10 | 东莞市科力钢铁线材有限公司 | Inverted type wire drawing machine |
| CN103440928A (en) * | 2013-08-15 | 2013-12-11 | 王玉凯 | Consecutive wrapping welding drawing production line for railway subgrade through ground wires |
| CN107742555A (en) * | 2017-11-16 | 2018-02-27 | 济南瑞通铁路电务有限责任公司 | A kind of rolling drawing production line and production technology for alloy sleeve Through ground wire |
| CN109500129A (en) * | 2018-12-27 | 2019-03-22 | 河南通达电缆股份有限公司 | A kind of manufacturing method of multipurpose zinc Baogang |
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| CN112742884B (en) | 2022-08-09 |
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Denomination of invention: A multi-stage drawing method for flexible zinc clad steel lightning protection grounding wire that can be bent Effective date of registration: 20230814 Granted publication date: 20220809 Pledgee: Industrial and Commercial Bank of China Limited Xinchang sub branch Pledgor: Zhejiang Huadian Lightning Protection Technology Co.,Ltd. Registration number: Y2023330001753 |
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