CN111360064A - Device and method for preparing special-shaped steel by local heating and cold bending forming - Google Patents
Device and method for preparing special-shaped steel by local heating and cold bending forming Download PDFInfo
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- CN111360064A CN111360064A CN202010294940.1A CN202010294940A CN111360064A CN 111360064 A CN111360064 A CN 111360064A CN 202010294940 A CN202010294940 A CN 202010294940A CN 111360064 A CN111360064 A CN 111360064A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 238000005452 bending Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000006698 induction Effects 0.000 claims abstract description 52
- 238000010008 shearing Methods 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 30
- 238000005096 rolling process Methods 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000009826 distribution Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 230000008719 thickening Effects 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 abstract description 3
- 238000005554 pickling Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 239000002253 acid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/12—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel in a continuous process, i.e. without reversing stands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0064—Uncoiling the rolled product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Geometry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a device and a method for preparing special-shaped steel by local heating and cold bending forming, which belong to the technical field of metal material processing, and mainly comprise an uncoiler, a leveler, a centering device, a shearing machine and the like, and are characterized by also comprising a forming unit consisting of 3-6 forming frames, wherein a group of induction heaters are arranged in front of each forming frame, the edge part of a workpiece is heated to 700-1000 ℃ when the workpiece passes through the induction heaters, and then the workpiece is gradually deformed under the action of a horizontal roller and a vertical roller on each forming frame. The device is adopted to produce the special-shaped steel, so that the equipment investment can be saved, the hot rolling burning loss is reduced, the pickling is avoided, and the economic and social benefits are obvious.
Description
Technical Field
The technology belongs to the technical field of metal material processing, and relates to a device and a method for preparing special-shaped steel by local heating and cold bending forming.
Background
At present, with the deep progress of various industrial and civil engineering, simple steel for plate and strip pipe type building can not fully meet the requirements of various construction projects and product processing, and various deformed steel bars with complex sections are produced, wherein typical deformed materials are various channel steels, I-shaped steels, channel steels and the like. However, most of the conventional manufacturing processes of the profiled bars are produced by heating the plate integrally and hot rolling, which brings about problems of cost increase, influence on steel quality, energy consumption, steel yield and the like, and further causes environmental pollution due to pickling.
In order to change the production technical condition, carry out technical innovation, and strive to save energy, reduce emission, save material and reduce weight in the material manufacturing process, people invented a transverse thickness-variable production and processing technology. The profiled bar is prepared according to a transverse thickness-changing process, the thickness of each relevant part of the plate can be properly changed according to the load condition, the service condition and the structural requirement, and compared with the conventional equal-thickness plate, the weight of the profiled bar is greatly reduced under the condition that the plate bears the same external stress.
When the variable-thickness plate is manufactured, a workpiece inevitably suffers great uneven deformation, and phenomena such as poor plate shape, large size deviation and even cracks occur. To solve these problems, the present patent application is now proposed.
Disclosure of Invention
The invention of this patent application aims at: firstly, differential temperature induction heating is utilized to reduce the local deformation resistance of a workpiece, improve the plasticity and enhance the capability of bearing uneven deformation; and secondly, processing the workpiece into a required section shape by using a centralized transmission forming unit through multi-pass gradual forming, and finally obtaining the qualified product of the transverse variable thickness plate.
According to the above-mentioned objects, the inventor has devised a production apparatus with local induction heating and rolling for steel, and the object of the present invention is really achieved by means of specific pass design and multi-pass cold roll bending. In practical implementation, a rolling forming unit formed by a plurality of rolling forming racks is utilized, a production device which mainly performs local thickening on two sides of steel by using horizontal roller pressing of the forming racks is adopted to perform rolling forming on the steel with a complicated section, and the device is designed to be a device for preparing special-shaped steel by local heating cold-bending forming, the device mainly comprises an uncoiler, a leveler, a centering device, a shearing machine, a collecting table and a power transmission device, and is characterized by also comprising 3-6 groups of induction heaters and 3-6 forming racks, wherein the uncoiler, the leveler, the centering device, the induction heaters, the forming unit, the shearing machine and the collecting table are arranged on a central line according to the sequence, a group of induction heaters are arranged in front of each forming rack according to needs, and the whole equipment is driven by the power device in a centralized and unified manner, wherein:
(1) the forming unit consists of n forming racks, wherein n is more than or equal to 3, a group of induction heaters matched with each forming rack is arranged in front of each forming rack, each group of induction heaters consists of 2-4 induction heating devices, and each group of induction heaters are powered by an induction heating power supply;
(2) the forming machine set adopts a centralized transmission mode, a power device of the forming machine set consists of a transmission motor, a speed reducer and a transmission distribution box, the transmission motor, the speed reducer and the transmission distribution box are connected together through a transmission shaft and a coupler, and the transmission distribution box is connected with each forming machine frame;
(3) each induction heater is respectively arranged in front of each forming rack, 2-4 induction heating devices of each group of induction heaters are symmetrically arranged at two sides of the edge of the workpiece to locally heat the edge of the workpiece;
(4) each forming frame consists of a pair of horizontal rollers and a pair of vertical rollers, wherein the middle parts of the horizontal rollers press the workpiece to drive the workpiece to move forwards along the rolling direction; the edge of the horizontal roller applies a pressing force to the workpiece, and the workpiece realizes thickening deformation in a hole pattern formed by the vertical roller and the horizontal roller; along with the increase of the rolling pass, the workpiece is subjected to thickening deformation gradually under the pressure action of each pair of horizontal rollers according to the design requirement of the workpiece to be processed.
(5) The rolling hole pattern formed by the last forming frame is a finished hole, and the finished hole is used as an edge part to obtain thickened workpiece shaping;
(6) the horizontal roller of the forming frame can be a flat roller with large convexity or a stepped roller, the size of the steps is designed according to the final requirement of the product shape, and the horizontal roller is matched with the vertical roller to form a hole pattern, so that the special-shaped plates with different shapes are processed.
The operation method for preparing the profiled bar by the local heating cold-bending forming is formed by utilizing the equipment to perform corresponding operation, and the specific content is as follows:
(1) starting a power device in equipment by taking coiled equal-thickness plates as raw materials of a workpiece to be processed, then placing the raw materials on an uncoiler, and after leveling by a leveling machine and centering by a centering device, entering a forming rack;
(2) starting an induction heater, carrying out local induction heating on two sides of a workpiece raw material to be extruded and thickened, and entering a forming rack when the temperature reaches 700-;
(3) adjusting the roll diameter of each horizontal roll of the forming stand according to the final thickness of the workpiece, wherein the convex roll surface positioned in the middle of the horizontal roll compresses and rolls the workpiece, and drives the workpiece to move forwards along the rolling direction through the convex roll surface;
(4) the diameter of the outer edge part of the horizontal roller of each forming frame in the forming unit is changed one by one to be gradually reduced, and enough space is reserved for pressing and forming two sides of the workpiece which is heated to 700-1000 ℃ under the action of the horizontal roller.
(5) The speed of the transmission motor is controlled, and the coordinated operation of the whole production line in a reasonable speed interval is ensured.
(6) The diameter and the roll gap of each horizontal roll are designed or adjusted, so that the workpiece is gradually deformed in the pass formed by the horizontal rolls and the vertical rolls, and the edges of the workpiece are gradually thickened under the gradual extrusion of each pair of horizontal rolls along with the increase of rolling passes until the target size is reached.
The device is used for production, and can obtain very good economic effect, which comprises the following steps:
1. the equipment investment is saved, and the production defects of integral heating, high-temperature rolling, energy waste, steel burning loss and the like of steel required by a hot rolling process are avoided;
2. the equipment investment is low, the construction of a heating furnace and an acid washing workshop is omitted, the occupied area is small, and the land resources are saved.
3. The environment is optimized, electricity is used as energy, and no combustion waste gas is generated; the pickling is eliminated, the water is saved, meanwhile, no acid gas is discharged, and no waste acid and acid-containing sludge are generated. Is beneficial to environmental protection and the life health of people.
Drawings
FIG. 1 is a schematic structural view of an induction heating plate multi-pass edge thickening rolling forming device;
FIG. 2 is a schematic view of the local heating of the ends of both sides of the workpiece;
FIG. 3 is a schematic view of the combined pass of the horizontal roll and the vertical roll of the edge thickening roll forming device;
FIG. 4 is a schematic view of a thickened groove pass under horizontal rolling;
FIG. 5 is a schematic view of a thickened I-shaped pass under horizontal rolling;
FIG. 6 is a sectional view of a variable thickness plate having a cross-sectional shape symmetrical about both horizontal and vertical axes;
FIG. 7 is a cross-sectional view of a variable thickness plate having a symmetrical cross-sectional shape about a vertical axis;
FIG. 8 is a sectional view of a variable thickness plate having a cross-sectional shape symmetrical about a horizontal axis;
FIG. 9 is a sectional view of a variable thickness plate in which the cross-sectional shape is asymmetrical both in the horizontal axis and in the vertical axis;
FIG. 10 is a cross-sectional view of a variable thickness plate having a cylindrical cross-sectional shape at the end;
FIG. 11 is a sectional view of a variable thickness plate having a curved cross-sectional shape.
In the drawings: the device comprises a transmission motor 1, a speed reducer 2, a transmission distribution box 3, a forming rack 4, an induction heater 5, an induction heating power supply 6, an uncoiler 7, a leveler 8, a centering device 9, a shearing machine 10, a collecting table 11, a horizontal roller 12, a vertical roller 13, a workpiece 14 and an induction heating area 15.
Detailed Description
The induction heating plate multi-pass edge thickening rolling forming device completed by the invention is implemented, the specific form is shown as attached figure 1, and the device mainly comprises an uncoiler 7, a leveler 8, a centering device 9, a shearing machine 10, a collecting table 11, a transmission motor 1 in a power transmission device, a speed reducer 2 and a transmission distribution box 3, it is characterized by also comprising 3-6 groups of induction heaters 5 and 3-6 forming frames 4, wherein an uncoiler 7, a leveler 8, a centering device 9, the induction heaters 5, the forming frames 4, a shearing machine 10 and a collecting table 11 are arranged on a central line according to the sequence, as required, the place ahead of each shaping frame 4 all is equipped with a set of induction heater 5, and every group induction heater contains 2 ~ 4 induction heating device, and whole equipment is concentrated unified drive by power device, wherein:
(1) the forming machine set consists of 3 forming machine frames 4, a single group of induction heaters 5 matched with the forming machine frames are arranged at the front ends of the forming machine frames 4, and the induction heaters 5 are powered by an induction heating power supply 6;
(2) each forming machine frame 4 adopts a centralized transmission mode, a power device of the forming machine frame is formed by combining a transmission motor 1, a speed reducer 2 and a transmission distribution box 3, the power device is connected with each other through a transmission shaft and a coupler, and the transmission distribution box 3 is connected with each forming machine frame 4 so as to drive the forming machine frames 4 to work.
(3) Each induction heater 5 is respectively arranged in front of each forming frame 4, 2-4 induction heating devices are symmetrically arranged at two sides of the edge end part of the workpiece 14, an induction heating power supply 6 supplies power to the induction heaters to locally heat the edge end part of the workpiece 14 to form an induction heating area 15, and the schematic diagram of induction heating is shown in fig. 2;
(4) each forming stand 4 is constituted by a pair of horizontal rolls 12 and a pair of vertical rolls 13, the combination of which has a pass as shown in fig. 3, and further: FIG. 4 is a schematic view of a thickened groove pass under horizontal rolling; FIG. 5 is a schematic view of a thickened I-shaped pass under horizontal rolling; when the device works, the middle part of the horizontal roller 12 presses the workpiece 14 to drive the workpiece 14 to move forwards along the rolling direction; the sides of the two horizontal rolls 12 leave a space for thickening the workpiece 14, and the workpiece 14 is gradually thickened and deformed in the pass formed by the vertical rolls 13 and the horizontal rolls 12 under the pressure of each pair of horizontal rolls according to the design requirement of the workpiece to be processed.
With the above apparatus, the following operations are performed:
(1) starting a power device in equipment by taking coiled equal-thickness plates as raw material workpieces, then placing the raw material workpieces on an uncoiler 7, leveling by a leveling machine 8, and centering by a centering device 9;
(2) starting the induction heater 5, carrying out local induction heating on two sides of the raw material workpiece 14 of the equal-thickness plate to be extruded and thickened to enable the temperature of the workpiece to reach 900 ℃, and then entering the forming rack 4;
(3) adjusting the roll diameter of the horizontal roll 12 of each forming stand according to the final thickness of the workpiece 14, wherein the workpiece 14 is pressed and rolled by a convex roll surface positioned in the middle of the horizontal roll 12, and the workpiece 14 is driven to move forwards along the rolling direction by the convex roll surface;
(4) the diameter of the outer edge part of the horizontal roller 12 of each forming frame 4 in the forming unit is changed one by one to be gradually reduced, and enough space is reserved for pressing and forming two sides of the workpiece 14 which is heated to 700 ℃ and 1000 ℃ under the rolling action of the horizontal roller 12.
(5) The speed of the transmission motor 1 is controlled according to the temperature rising speed of different raw material workpieces heated by the induction heater 5, and the coordinated operation of the whole production line in a reasonable speed interval is ensured.
(6) Designing or adjusting the diameter and the roll gap of each horizontal roll 12, so that the workpiece 14 is gradually deformed in the pass formed by the horizontal roll 12 and the vertical roll 14, and according to the change of the pass, under the gradual squeezing of each pair of horizontal rolls 12, the edge of the workpiece 14 is gradually thickened, and finally, the manufactured workpiece product can be a transverse section which is symmetrical about a horizontal axis or a vertical axis, as shown in fig. 6-11; it may be formed as a transverse section which is symmetrical about a horizontal axis and asymmetrical about a vertical axis; or a transverse section that is asymmetric about a horizontal axis, symmetric about a vertical axis; or a transverse section that is asymmetric about a horizontal axis and also asymmetric about a vertical axis.
Claims (2)
1. A device and a method for preparing special-shaped steel by local heating cold-bending forming mainly comprise an uncoiler, a leveler, a centering device, a shearing machine, a collecting table and a power transmission device, and are characterized by also comprising 3-6 groups of induction heaters and a forming unit consisting of 3-6 forming frames, wherein the uncoiler, the leveler, the centering device, the induction heaters, the forming unit, the shearing machine and the collecting table are arranged on a central line according to the sequence, a group of induction heaters are arranged in front of each forming frame, and the whole equipment is driven by the power device in a centralized and unified manner, wherein:
(1) a group of induction heaters matched with each forming rack is arranged in front of each forming rack, each group of induction heaters consists of 2-4 induction heating devices, and each group of induction heaters is powered by an induction heating power supply;
(2) the forming machine set adopts a centralized transmission mode, a power device of the forming machine set consists of a transmission motor, a speed reducer and a transmission distribution box, the transmission motor, the speed reducer and the transmission distribution box are connected together through a transmission shaft and a coupler, and the transmission distribution box is connected with each forming machine frame;
(3) each induction heater is respectively arranged in front of each forming rack, 2-4 induction heating devices of each group of induction heaters are symmetrically arranged at two sides of the edge of the workpiece to locally heat the edge of the workpiece;
(4) each forming frame consists of a pair of horizontal rollers and a pair of vertical rollers, wherein the middle parts of the horizontal rollers press the workpiece to drive the workpiece to move forwards along the rolling direction; the edge of the horizontal roller applies a pressing force to the workpiece, and the workpiece realizes thickening deformation in a hole pattern formed by the vertical roller and the horizontal roller; along with the increase of the rolling pass, the workpiece is subjected to thickening deformation gradually under the pressure action of each pair of horizontal rollers according to the design requirement of the workpiece to be processed.
(5) The rolling hole pattern formed by the last forming frame is a finished hole, and the finished hole is used as an edge part to obtain thickened workpiece shaping;
(6) the horizontal roller of the forming frame can be a flat roller with large convexity or a stepped roller, the size of the steps is designed according to the final requirement of the product shape, and the horizontal roller is matched with the vertical roller to form a hole pattern, so that the special-shaped plates with different shapes are processed.
2. A method for manufacturing profiled bars by local heating cold-bending forming is characterized in that the equipment is used for operating according to the following contents:
(1) starting a power device in equipment by taking coiled equal-thickness plates as raw materials of a workpiece to be processed, then placing the raw materials on an uncoiler, and after leveling by a leveling machine and centering by a centering device, entering a forming rack;
(2) starting an induction heater, carrying out local induction heating on two sides of a workpiece raw material to be rolled and thickened, and entering a forming rack when the temperature reaches 700-;
(3) adjusting the roll diameter size of each horizontal roll of the forming stand according to the final thickness of the workpiece, wherein the part which is positioned in the middle of the horizontal roll and protrudes out of the roll surface compresses and rolls the workpiece, and drives the workpiece to move forwards along the rolling direction through self rotation;
(4) changing the diameter of the outer edge part of the horizontal roller of each forming rack in the forming unit one by one to gradually reduce the diameter, and reserving enough space to be beneficial to carrying out press forming on two sides of a workpiece which is heated to 700-1000 ℃ under the action of the horizontal roller;
(5) controlling the speed of a transmission motor to ensure that the whole production line operates coordinately in a reasonable speed interval;
(6) designing or adjusting the diameter and the roll gap of each horizontal roll to ensure that the workpiece is gradually deformed in a hole pattern formed by the horizontal rolls and the vertical rolls; and (3) gradually thickening the edge of the workpiece under the gradual squeezing of each pair of vertical roll and horizontal roll along with the increase of the rolling pass until the target size is reached.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019113871997 | 2019-12-30 | ||
| CN201911387199 | 2019-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111360064A true CN111360064A (en) | 2020-07-03 |
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ID=71201630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010294940.1A Pending CN111360064A (en) | 2019-12-30 | 2020-04-15 | Device and method for preparing special-shaped steel by local heating and cold bending forming |
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| CN (1) | CN111360064A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101375A (en) * | 2020-09-01 | 2022-03-01 | 欣诺冷弯型钢产业研究院（曹妃甸）有限公司 | Cold and hot composite forming system and method for seaming spiral air pipe |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986000246A1 (en) * | 1984-06-29 | 1986-01-16 | SSAB SVENSKT STA^oL AB | Method to produce profiled bars |
| ATA29293A (en) * | 1993-02-16 | 1994-04-15 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING A TAPE, PRE-STRIP OR A LAM |
| JPH06114404A (en) * | 1992-10-05 | 1994-04-26 | Sumitomo Metal Ind Ltd | Manufacture of metallic sheet small in edge drop |
| JP2004276102A (en) * | 2003-03-18 | 2004-10-07 | Jfe Steel Kk | Method for hot forming of flange from h-section steel by rolling |
| CN202683595U (en) * | 2012-08-01 | 2013-01-23 | 大连伯新特钢制品有限公司 | I-shaped four-linking molding production line |
| CN208495433U (en) * | 2018-07-17 | 2019-02-15 | 韩静涛 | A kind of cold and hot combined shaping square and rectangular pipe formation system that corner thickens |
| CN110079936A (en) * | 2019-04-17 | 2019-08-02 | 厦门当盛新材料有限公司 | Fiber aftertreatment equipment and method are spun in a kind of sudden strain of a muscle |
| CN214160876U (en) * | 2019-12-30 | 2021-09-10 | 东北大学无锡研究院 | Device for manufacturing special-shaped steel by local heating and cold bending forming |
-
2020
- 2020-04-15 CN CN202010294940.1A patent/CN111360064A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986000246A1 (en) * | 1984-06-29 | 1986-01-16 | SSAB SVENSKT STA^oL AB | Method to produce profiled bars |
| JPH06114404A (en) * | 1992-10-05 | 1994-04-26 | Sumitomo Metal Ind Ltd | Manufacture of metallic sheet small in edge drop |
| ATA29293A (en) * | 1993-02-16 | 1994-04-15 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING A TAPE, PRE-STRIP OR A LAM |
| JP2004276102A (en) * | 2003-03-18 | 2004-10-07 | Jfe Steel Kk | Method for hot forming of flange from h-section steel by rolling |
| CN202683595U (en) * | 2012-08-01 | 2013-01-23 | 大连伯新特钢制品有限公司 | I-shaped four-linking molding production line |
| CN208495433U (en) * | 2018-07-17 | 2019-02-15 | 韩静涛 | A kind of cold and hot combined shaping square and rectangular pipe formation system that corner thickens |
| CN110079936A (en) * | 2019-04-17 | 2019-08-02 | 厦门当盛新材料有限公司 | Fiber aftertreatment equipment and method are spun in a kind of sudden strain of a muscle |
| CN214160876U (en) * | 2019-12-30 | 2021-09-10 | 东北大学无锡研究院 | Device for manufacturing special-shaped steel by local heating and cold bending forming |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101375A (en) * | 2020-09-01 | 2022-03-01 | 欣诺冷弯型钢产业研究院（曹妃甸）有限公司 | Cold and hot composite forming system and method for seaming spiral air pipe |
| CN114101375B (en) * | 2020-09-01 | 2024-09-27 | 广州欣诺精密钢管产业研究院有限公司 | Cold and hot composite forming system and method for seaming of spiral air duct |
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