CN112828078A - Simple cavity profile straightening and stretching device and method - Google Patents
Simple cavity profile straightening and stretching device and method Download PDFInfo
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- CN112828078A CN112828078A CN202011633902.0A CN202011633902A CN112828078A CN 112828078 A CN112828078 A CN 112828078A CN 202011633902 A CN202011633902 A CN 202011633902A CN 112828078 A CN112828078 A CN 112828078A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 61
- 230000007246 mechanism Effects 0.000 claims abstract description 57
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- 238000001125 extrusion Methods 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/12—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by stretching with or without twisting
-
- 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
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/02—Removing or drawing-off work
- B21C35/03—Straightening the work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
Abstract
The embodiment of the invention discloses a simple cavity profile straightening and stretching device which comprises a guide rail, a first hydraulic device, a main body member, a pressing mechanism, a rotating arm, a second hydraulic device, a cavity cushion block and a third hydraulic device, wherein the guide rail is arranged on the main body member; the first hydraulic device is fixedly connected with the guide rail through a fixed support, and the first hydraulic device is connected with the main body component; the second hydraulic device is arranged on the upper part of the main body component and is connected with the rotating arm; the rotating arm is fixedly connected with the pressing mechanism, and the second hydraulic device can drive the rotating arm to swing up and down so as to drive the pressing mechanism to swing up and down; and a clamping base plate matched with the pressing mechanism is arranged below the pressing mechanism, and the cavity cushion block is connected with the third hydraulic device. Correspondingly, the invention also provides a simple cavity section bar straightening and stretching method. The device can basically realize the automation of the straightening operation, is easy to operate and greatly reduces the labor intensity.
Description
Technical Field
The invention relates to the field of metal processing, in particular to a simple cavity profile straightening and stretching device and method.
Background
In the aluminium processing industry, extruded products are of considerable importance and the most predominant method of production of aluminium alloy profiles is by extrusion. Extrusion refers to a plastic processing method in which an ingot blank contained in an extrusion cylinder is extruded out of a specific die hole or flows into a specific gap by using an extrusion rod to form, and common extrusion methods include forward extrusion, backward extrusion, lateral extrusion, continuous extrusion and other extrusion methods.
Extrusion of profiles, especially hollow-chamber profiles, is usually carried out by hot extrusion. The ingot blank is heated to a certain temperature, and passes through a specific mould at a certain speed under the action of an extrusion shaft, and then is assisted with a specific cooling mode and subsequent treatment to meet the use requirement. Wherein, the thin-wall section is mostly produced by extruding 6063 alloy.
In the material forming process, the section discharging usually has bending in different degrees due to the reasons of material wall thickness difference, a die, a traction mode, a cooling mode and the like. In order to ensure the usability of the product, the straightening process is indispensable.
In addition, internal stress of different degrees can be remained in a product structure due to cooling, the internal stress is usually eliminated by increasing the stretching amount and controlling the stretching amount to be 1-3%, so that more vacancies and dislocations appear in the alloy structure, and in the subsequent aging process, the dislocations with different signs are mutually offset due to the motion effect, so that the lattice distortion is eliminated. Since 80% of the internal stress is the third type of internal stress due to lattice distortion, the reduction of lattice distortion can effectively eliminate the internal stress. In the production process, in order to ensure the production efficiency and delivery efficiency, straightening and stretching are generally carried out synchronously.
In the traditional extrusion production process, a straightening machine or a stretching machine adopts a downward pressing type. The method is convenient for straightening and drawing the solid material or the section with large wall thickness. However, for the section bar with large cavity and higher planeness requirement, it is not suitable, because the downward pressure is larger, the clamping section is seriously deformed, and under the action of straightening force, the section bar is mostly concave in surface and can not be shaped. The problem is solved by adopting a mode of assembling a cushion block on a tool before straightening each section, manually disassembling the cushion block after stretching, assembling the section after stretching the lower support section, repeating the steps, and having complex operation and high labor intensity.
Disclosure of Invention
The embodiment of the invention aims to solve the technical problems of complex operation and high labor intensity of the existing straightening and stretching equipment, and provides a simple cavity section straightening and stretching device and method, which can basically realize the automation of straightening operation, are easy to operate and greatly reduce the labor intensity.
In order to solve the technical problem, an embodiment of the present invention provides a simple cavity profile straightening and stretching device, which includes a guide rail, a first hydraulic device, a main body member, a pressing mechanism, a rotating arm, a second hydraulic device, a cavity cushion block, and a third hydraulic device; the first hydraulic device is fixedly connected with a guide rail through a fixed support, the first hydraulic device is connected with the main body member, a pulley is arranged on the main body member, and the main body member can be driven by the first hydraulic device to move along the guide rail; the second hydraulic device is arranged on the upper part of the main body component and is connected with the rotating arm; the middle part of the main body component is provided with an accommodating groove, and the pressing mechanism is arranged in the accommodating groove and can swing up and down; the rotating arm is fixedly connected with the pressing mechanism, and the second hydraulic device can drive the rotating arm to swing up and down so as to drive the pressing mechanism to swing up and down; the lower part of the pressing mechanism is provided with a clamping base plate matched with the pressing mechanism, the cavity cushion block is arranged between the pressing mechanism and the clamping base plate, the cavity cushion block is connected with a third hydraulic device, and the third hydraulic device can drive the cavity cushion block to move transversely.
As a modification of the above, the pressing mechanism is connected to the body member through a rotary shaft; the pressing mechanism is fixedly connected with the rotating shaft, and the rotating shaft can rotate relative to the main body component.
As an improvement of the above scheme, the rotating shaft penetrates through the main body member, and two ends of the rotating shaft are fixedly connected with the rotating arm.
As an improvement of the scheme, the main body pressing mechanism consists of a plurality of metal blocks, and the metal blocks are oppositely arranged at intervals and with preset distances; the lower part of the metal block is provided with an oval cambered surface.
As an improvement of the scheme, the outer contour of the cavity cushion block is adapted to the contour of the aluminum cavity to be shaped.
As a modification of the above, the first hydraulic device, the second hydraulic device and the third hydraulic device are hydraulic cylinders of different sizes.
As an improvement of the scheme, the oval arc surface and/or the clamping base plate are/is provided with anti-skid stripes.
Correspondingly, the embodiment of the invention also provides a simple cavity profile straightening and stretching method, which adopts the simple cavity profile straightening and stretching device to shape the aluminum material, and comprises the following steps:
(1) extruding the section by an extruder, passing through an online cooling system, interrupting by an interruption saw, then dragging by a tractor to reach an extrusion rear equipment material bed, and then transversely transmitting to a straightener to be straightened and stretched;
(2) when the cavity section bar is straightened and stretched for the first time, a third hydraulic device is independently controlled on a control operation panel of the straightening machine to enable a telescopic rod of the third hydraulic device to extend out, and the end part of the telescopic rod is provided with the cavity cushion block;
(3) the profile is positioned in the middle of a front straightener and a rear straightener by accurately controlling the transmission displacement of the profile, a second hydraulic device is started to drive a pressing mechanism, the pressing mechanism moves in two steps, in the first step, an oval cambered surface of a metal block of the pressing mechanism presses down to the profile to enable the profile to be fixed, a third hydraulic device is started to push a cavity cushion block into a cavity of the profile, and in the second step, the pressing force of the pressing mechanism is set according to the process to clamp the profile;
(4) setting the stretching length according to the process, starting a first hydraulic device, and moving a main body member backwards to longitudinally stretch the section;
(5) after the stretching is finished, the pressing mechanism resets, the third hydraulic device resets, the cavity cushion block is separated from the inner cavity of the section bar, and the section bar is transmitted to a finished product sawing position by the material bed;
(6) and repeating the steps 3 to 5 to perform straightening and stretching of other profiles.
The embodiment of the invention has the following beneficial effects:
the device can basically realize the automation of the straightening operation, is easy to operate and greatly reduces the labor intensity. By applying the device and the method, the cavity section can be effectively straightened and stretched, and the deformation of the clamping part is small; after the device is used for straightening, the flatness requirement can be basically met after the head and tail waste materials are removed. The cavity cushion blocks can be detached, the cavity cushion blocks in different shapes can be replaced aiming at aluminum products in different models, the applicability is strong, and the interchangeability is good.
Drawings
FIG. 1 is a schematic structural diagram of a simple cavity profile straightening and stretching device according to the present invention;
FIG. 2 is a schematic structural diagram of a pressing mechanism and a cavity cushion block of a simple cavity profile straightening and stretching device of the invention;
fig. 3 is a cross-sectional view of a simple cavity profile straightening and stretching device of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the invention is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the invention.
As shown in fig. 1 to 3, a simple hollow cavity profile straightening and stretching device according to a specific embodiment of the present invention includes a guide rail 1, a first hydraulic device 2, a main body member 3, a pressing mechanism 4, a rotating arm 5, a second hydraulic device 6, a hollow cavity cushion block 7, and a third hydraulic device 8; the first hydraulic device 2 is fixedly connected with a guide rail 1 through a fixed support 9, the first hydraulic device 2 is connected with the main body member 3, a pulley 10 is arranged on the main body member 3, and the main body member 3 can be driven by the first hydraulic device 2 to move along the guide rail 1; the second hydraulic device 6 is arranged at the upper part of the main body component 3 and is connected with the rotating arm 5; the middle part of the main body component 3 is provided with an accommodating groove 31, and the pressing mechanism 4 is arranged in the accommodating groove 31 and can swing up and down; the rotating arm 5 is fixedly connected with the pressing mechanism 4, and the second hydraulic device 6 can drive the rotating arm 5 to swing up and down so as to drive the pressing mechanism 4 to swing up and down; the lower part of the pressing mechanism 4 is provided with a clamping base plate 11 matched with the pressing mechanism, the cavity cushion block 7 is arranged between the pressing mechanism 4 and the clamping base plate 11, the cavity cushion block 7 is connected with the third hydraulic device 8, and the third hydraulic device 8 can drive the cavity cushion block 7 to move transversely.
The device can basically realize the automation of the straightening operation, is easy to operate and greatly reduces the labor intensity. By using the device, the cavity section bar can be effectively straightened and stretched, and the deformation of the clamping part is small; after the device is used for straightening, the flatness requirement can be basically met after the head and tail waste materials are removed. The cavity cushion blocks 7 can be detached, the cavity cushion blocks 7 in different shapes can be replaced aiming at aluminum products in different models, the applicability is strong, and the interchangeability is good.
Wherein the pressing mechanism 4 is connected with the body member 3 through a rotating shaft 12; the pressing mechanism 4 is fixedly connected to the rotary shaft 12, and the rotary shaft 12 is rotatable with respect to the body member 3. The rotary shaft 12 penetrates the main body member 3, and both ends thereof are fixedly connected to the rotary arm 5. Since aluminum product production plants often have a high level of aluminum scrap, the scrap tends to fall into the various moving elements, impeding the movement of the various moving elements. The rotating arm 5 in the shape drives the pressing mechanism 4, the pressing mechanism 4 is stable in movement and not easily affected by debris, and the actual use requirement on the site is met.
Preferably, the pressing mechanism 4 is composed of a plurality of metal blocks 41, and the metal blocks 41 are oppositely arranged at a predetermined distance from each other; the lower part of the metal block 41 is provided with an oval arc surface 411. By adopting the structure, the spacing of the metal blocks 41 can avoid the sheet-shaped bulges possibly appearing on the surface of the aluminum material, so that the pressing mechanism 4 is clamped on the stressed surface of the aluminum material; in addition, the pressing mechanism 4 with the structure can increase the friction coefficient of the aluminum material, and the clamping is firmer.
Preferably, the outer contour of the cavity cushion block 7 is adapted to the contour of the aluminum cavity to be shaped. After the cavity cushion block 7 extends into the cavity of the aluminum material, when the aluminum material is pressed by the pressing mechanism 4 and the clamping cushion plate 11, the cavity cushion block 7 can keep the aluminum material in the original shape, and the excessive deformation of the aluminum material caused by the clamping force is avoided.
Preferably, the first hydraulic means 2, the second hydraulic means 6 and the third hydraulic means 8 are hydraulic cylinders of different sizes.
Preferably, in order to increase the friction coefficient of the pressing mechanism 4 and/or the clamping mat 11, the oval arc surface 411 and/or the clamping mat 11 are provided with anti-slip stripes 13.
The specific embodiment of the invention also provides a simple cavity profile straightening and stretching method, which comprises the following steps:
1. extruding the section by an extruder, passing through an online cooling system, interrupting by an interruption saw, then dragging by a tractor to reach an extrusion rear equipment material bed, and then transversely transmitting to a straightener to be straightened and stretched;
2. when the cavity section bar is straightened and stretched for the first time, the third hydraulic device 8 is independently controlled on the control operation panel of the straightening machine to enable the telescopic rod of the third hydraulic device to extend out, the end part of the telescopic rod is provided with the cavity cushion block 7 (designed and manufactured aiming at the produced section bar in advance), and the step is not required to be repeated in the subsequent straightening and stretching;
3. the profile is positioned in the middle of a front straightener and a rear straightener by accurately controlling the transmission displacement of the profile, a second hydraulic device 6 is started to drive a pressing mechanism 4, the pressing mechanism 4 moves in two steps, in the first step, an oval cambered surface 411 of a metal block 41 of the pressing mechanism 4 is pressed down to the profile to enable the profile to be fixed, a third hydraulic device 8 is started to push a cavity cushion block 7 into a cavity of the profile, and in the second step, the pressing force of the pressing mechanism 4 is set according to the process to clamp the profile;
4. and setting the stretching length according to the process, starting the first hydraulic device 2, and moving the main body component 3 backwards to stretch the profile longitudinally.
5. After stretching, the pressing mechanism 4 is reset, the third hydraulic device 8 is reset, the cavity cushion block 7 is separated from the inner cavity of the section bar, and the section bar is conveyed to the sawing position of a finished product by the material bed.
6. And repeating the steps 3 to 5 to perform straightening and stretching of other profiles.
By using the method, the cavity section can be effectively straightened and stretched, and the deformation of the clamping part is small; after the device is used for straightening, the flatness requirement can be basically met after the head and tail waste materials are removed. The cavity cushion blocks 7 can be detached, the cavity cushion blocks in different shapes can be replaced aiming at aluminum products in different models, the applicability is strong, and the interchangeability is good.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A simple cavity profile straightening and stretching device is characterized by comprising a guide rail, a first hydraulic device, a main body member, a pressing mechanism, a rotating arm, a second hydraulic device, a cavity cushion block and a third hydraulic device;
the first hydraulic device is fixedly connected with a guide rail through a fixed support, the first hydraulic device is connected with the main body member, a pulley is arranged on the main body member, and the main body member can be driven by the first hydraulic device to move along the guide rail;
the second hydraulic device is arranged on the upper part of the main body component and is connected with the rotating arm;
the middle part of the main body component is provided with an accommodating groove, and the pressing mechanism is arranged in the accommodating groove and can swing up and down;
the rotating arm is fixedly connected with the pressing mechanism, and the second hydraulic device can drive the rotating arm to swing up and down so as to drive the pressing mechanism to swing up and down;
the lower part of the pressing mechanism is provided with a clamping base plate matched with the pressing mechanism, the cavity cushion block is arranged between the pressing mechanism and the clamping base plate, the cavity cushion block is connected with a third hydraulic device, and the third hydraulic device can drive the cavity cushion block to move transversely.
2. The simple cavity profile straightening and stretching device as claimed in claim 1, wherein the pressing mechanism is connected with the main body member through a rotating shaft; the pressing mechanism is fixedly connected with the rotating shaft, and the rotating shaft can rotate relative to the main body component.
3. The simple hollow cavity profile straightening and stretching device as claimed in claim 2, wherein the rotating shaft penetrates through the main body member, and both ends of the rotating shaft are fixedly connected with the rotating arms.
4. The simple hollow cavity profile straightening and stretching device as claimed in claim 3, wherein the main body pressing mechanism is composed of a plurality of metal blocks, and the metal blocks are oppositely arranged at a predetermined distance from each other; the lower part of the metal block is provided with an oval cambered surface.
5. The simple cavity profile straightening and stretching device as claimed in claim 1, wherein the outer contour of the cavity cushion block is adapted to the contour of the aluminum cavity to be shaped.
6. The simple cavity profile straightening and stretching device as claimed in claim 1, wherein the first hydraulic device, the second hydraulic device and the third hydraulic device are hydraulic cylinders of different sizes.
7. The simple hollow profile straightening and stretching device as claimed in claim 4, characterized in that the oval arc-shaped surface and/or the clamping shim plate are provided with anti-slip strips.
8. A method for straightening and stretching a simple cavity profile is characterized in that the simple cavity profile straightening and stretching device 1-7 is adopted to shape an aluminum material, and comprises the following steps:
(1) extruding the section by an extruder, passing through an online cooling system, interrupting by an interruption saw, then dragging by a tractor to reach an extrusion rear equipment material bed, and then transversely transmitting to a straightener to be straightened and stretched;
(2) when the cavity section bar is straightened and stretched for the first time, a third hydraulic device is independently controlled on a control operation panel of the straightening machine to enable a telescopic rod of the third hydraulic device to extend out, and the end part of the telescopic rod is provided with the cavity cushion block;
(3) the profile is positioned in the middle of a front straightener and a rear straightener by accurately controlling the transmission displacement of the profile, a second hydraulic device is started to drive a pressing mechanism, the pressing mechanism moves in two steps, in the first step, an oval cambered surface of a metal block of the pressing mechanism presses down to the profile to enable the profile to be fixed, a third hydraulic device is started to push a cavity cushion block into a cavity of the profile, and in the second step, the pressing force of the pressing mechanism is set according to the process to clamp the profile;
(4) setting the stretching length according to the process, starting a first hydraulic device, and moving a main body member backwards to longitudinally stretch the section;
(5) after the stretching is finished, the pressing mechanism resets, the third hydraulic device resets, the cavity cushion block is separated from the inner cavity of the section bar, and the section bar is transmitted to a finished product sawing position by the material bed;
(6) and repeating the steps 3 to 5 to perform straightening and stretching of other profiles.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011633902.0A CN112828078A (en) | 2020-12-31 | 2020-12-31 | Simple cavity profile straightening and stretching device and method |
| PCT/CN2021/111376 WO2022142349A1 (en) | 2020-12-31 | 2021-08-08 | Simple cavity profile straightening and stretching device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011633902.0A CN112828078A (en) | 2020-12-31 | 2020-12-31 | Simple cavity profile straightening and stretching device and method |
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| CN112828078A true CN112828078A (en) | 2021-05-25 |
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| CN202011633902.0A Pending CN112828078A (en) | 2020-12-31 | 2020-12-31 | Simple cavity profile straightening and stretching device and method |
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| CN (1) | CN112828078A (en) |
| WO (1) | WO2022142349A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022142349A1 (en) * | 2020-12-31 | 2022-07-07 | 广东坚美铝型材厂（集团）有限公司 | Simple cavity profile straightening and stretching device and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117415372A (en) * | 2023-12-18 | 2024-01-19 | 江苏雄鑫铝业有限公司 | Full-automatic intelligent three-head traction machine for aluminum profile |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT389655B (en) * | 1987-12-01 | 1990-01-10 | Haginger Peter | Plant for producing aluminium sections |
| CN102728664A (en) * | 2012-07-03 | 2012-10-17 | 辽宁忠旺集团有限公司 | Hydraulic stretching machine |
| CN202655396U (en) * | 2012-07-03 | 2013-01-09 | 辽宁忠旺集团有限公司 | Hydraulic stretching straightening machine |
| CN104942049A (en) * | 2015-06-11 | 2015-09-30 | 辽宁忠旺机械设备制造有限公司 | Automatic scaling tension straightening machine and method |
| CN205183387U (en) * | 2015-11-26 | 2016-04-27 | 南昌市雄一铝业有限公司 | Aluminium alloy straightener |
| CN207154455U (en) * | 2017-08-31 | 2018-03-30 | 湖南金牛铝业有限公司 | A kind of aluminum strip stretching-straightening device |
| CN209318524U (en) * | 2018-12-29 | 2019-08-30 | 西南铝业（集团）有限责任公司 | A kind of aviation big specification hollow profile tension straingtening equipment and its plug |
| CN210435068U (en) * | 2019-06-10 | 2020-05-01 | 池州市九华明坤铝业有限公司 | Aluminum profile straightening device |
| CN112828078A (en) * | 2020-12-31 | 2021-05-25 | 广东坚美铝型材厂（集团）有限公司 | Simple cavity profile straightening and stretching device and method |
-
2020
- 2020-12-31 CN CN202011633902.0A patent/CN112828078A/en active Pending
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2021
- 2021-08-08 WO PCT/CN2021/111376 patent/WO2022142349A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022142349A1 (en) * | 2020-12-31 | 2022-07-07 | 广东坚美铝型材厂（集团）有限公司 | Simple cavity profile straightening and stretching device and method |
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| WO2022142349A1 (en) | 2022-07-07 |
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