CN113118238B - Integrated forming device and process for annular flat tubes - Google Patents
Integrated forming device and process for annular flat tubes Download PDFInfo
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- CN113118238B CN113118238B CN202110359468.XA CN202110359468A CN113118238B CN 113118238 B CN113118238 B CN 113118238B CN 202110359468 A CN202110359468 A CN 202110359468A CN 113118238 B CN113118238 B CN 113118238B
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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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
Abstract
The device and the process for integrally forming the annular flat tube comprise a section pre-forming system, a roll bending system, a plurality of rolling flattening forming rollers and a gate guide device, wherein the output of the section pre-forming system is matched with the input of the roll bending system, the output of the roll bending system is sequentially provided with the plurality of rolling flattening forming rollers, and the gate guide device for guiding a workpiece to move is distributed among the plurality of rolling flattening forming rollers; the invention can integrate the functions of processing a flat section and bending a roller into a ring, reduces the occupied space, and has the advantages of less clamping times, simple mechanical structure, high production efficiency, low production cost and the like.
Description
Technical Field
The invention belongs to the technical field of metal forming, and particularly relates to an integrated forming device and process for an annular flat tube.
Background
The annular flat tube is an important aerospace industry part and plays an important role in a separation device of a carrier rocket; meanwhile, in the fin-and-tube heat exchanger, the annular flat tube is indispensable as a final heat exchange performing part. Some heat exchangers in the existing market adopt round tubes with poor heat exchange effect as heat exchange devices, and the problems that the annular flat tubes are difficult to manufacture, the manufacturing process is complicated, the manufacturing efficiency is low, the space required by production equipment is large and the like exist in the production process.
The existing processing technology of the annular flat tube mainly comprises the following steps: the multi-pass rolling forming is carried out, the forming rollers are arranged in a linear shape, and the space occupied by production equipment is large; the drawing forming also has the problem of large space occupied by production equipment; chinese patent application No. 201310746574.9 discloses a manufacturing method of flat tubes by hot press forming, which is complicated in processing process; and the forming process can only process the section and cannot produce the flat tube with the radian.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a device and a process for integrally forming an annular flat tube, which can integrate the functions of processing a flat section and bending a roll into a ring, reduce the occupied space and have the advantages of less clamping times, simple mechanical structure, high production efficiency, low production cost and the like.
In order to achieve the purpose, the invention adopts the technical scheme that:
the device for integrally forming the annular flat tube comprises a section preforming system, a roll bending system, a multi-pass roll flattening forming roll and a inter-pass guide device, wherein the output of the section preforming system is matched with the input of the roll bending system, the output of the roll bending system is sequentially provided with the multi-pass roll flattening forming roll, and the inter-pass guide device for guiding a workpiece to move is distributed among the multi-pass roll flattening forming rolls.
The section preforming system comprises m pairs of preforming rollers, and the value range of m is 2-4; a first guide roller 21 is arranged between the m pairs of preforming rollers 1, and the first guide roller 21 is arranged on the frame 6; each pre-forming roller 1 is driven by a first servo motor 2, a rotor of the first servo motor 2 is connected with a first stepped shaft 4 through a first coupler 3, a first sleeve 5 is installed on the first stepped shaft 4 through a bearing, and the first sleeve 5 is installed on a rack 6; the end of the first stepped shaft 4 is connected with the preforming roller 1, and the working surface of the preforming roller 1 is a cylindrical surface.
The roll bending system comprises a vertical downward-adjusting three-roll bending device formed by a first fixed roll 7 with a power source, a second fixed roll 9 and a follow-up roll 8 without the power source, and the follow-up roll 8 is controlled by a second servo motor 11 to move radially; the follow-up roller 8 is arranged on a first guide block 10, two sides of the first guide block 10 are in transition fit with the frame 6, and the first guide block 10 is connected with an output shaft of a second servo motor 11 through a first connecting rod 12; the second servo motor 11 drives the first connecting rod 12 to rotate, and then drives the first guide block 10 to do linear motion, so that the radian of a common tangent line among the first fixed roller 7, the second fixed roller 9 and the follow-up roller 8 is finely adjusted, and the radian of a workpiece after the rollers are bent is further adjusted.
The multi-pass roll flattening forming roll comprises n pairs of forming rolls, and the forming rolls are mutually included at an angle
Are sequentially arranged behind the roll bending system; the working surface distance on the line of the centers of the symmetrical surfaces of the multi-pass forming rollers is changed along with the shape of the cross section, wherein the working surfaces of the front n-1 pairs of forming rollers are cylindrical surfaces, and finally the working surfaces of the nth pair of forming rollers are consistent with the outer surfaces of the flat tubes; the assembling relation of the n pairs of forming rollers is the same as that of the final forming roller 17, the final forming roller 17 is arranged on a second stepped shaft 18, the middle of the second stepped shaft 18 is connected with a second sleeve 19 through a bearing, and the second sleeve 19 is assembled on the frame 6; addition of the second step shaft 18One end of the second shaft coupling 20 is connected with a third servo motor 38; the second stepped shaft 18 is fitted on a second guide block 27, the second guide block 27 being fitted on the frame 6; one end of the second guide block 27 is provided with a threaded second connecting rod 36, the other end of the second connecting rod 36 is connected with the fourth servo motor 26 through a third coupler 37, the fourth servo motor 26 drives the second connecting rod 36 to rotate, and the rotary motion of the second connecting rod 36 is converted into the linear motion of the second guide block 27 connected with the second connecting rod through a thread pair, so that the center distance of the forming roller pair is adjusted.
The inter-pass guiding device 13 comprises a third stepped shaft 28, the third stepped shaft 28 is connected to the rack 6 through matching with a bearing 29, one end of the third stepped shaft 28 is fixedly arranged on the rack 6 through a first retainer ring 30 and a nut 31, the other end of the third stepped shaft 28 is provided with a stepped sleeve 22, two ends of the stepped sleeve 22 are respectively positioned through a shaft shoulder of the third stepped shaft 28 and a second retainer ring 32, and the inter-pass guiding devices 13 are uniformly distributed on the circumference of the rack 6.
The process of utilizing one kind of annular flat pipe forming apparatus includes the following steps:
1) blanking, the length L of the round metal pipe to be processed is pi R2Wherein R is the geometric neutral layer radius of the final workpiece;
2) performing a metal pipe, wherein a fixed-length metal round pipe passes through m pairs of performing rollers 1, and the round section of the metal round pipe is preliminarily deformed into a flat section which is easily rolled into a ring;
3) the method comprises the following steps that flat metal pipes are subjected to roll bending, the preformed metal pipes pass through a roll bending system, a first fixed roller 7 and a second fixed roller 9 rotate clockwise, a follow-up roller 8 rotates anticlockwise, the metal pipes pass through the first fixed roller 7, the follow-up roller 8 and the second fixed roller 9, and the metal pipes are processed into flat pipes with radian by a vertical downward-adjusting three-roller roll bending device;
4) starting section processing, wherein the curved flat tube enters a first-pass forming roller through a guide device between the roll bending forming roller and the first-pass section forming roller, the flat section of the flat tube is specified to have a major diameter and a minor diameter, the major diameter is a longer symmetrical line in a symmetrical axis of the flat section, and the major diameter is larger than the diameter of the section of an original circle; the small diameter is a shorter symmetrical line in the symmetrical axis of the flat section; the small diameter of the flat section is reduced after the first pass of section forming rolling;
5) processing a cross section, namely performing subsequent 2 nd to n-1 th roll forming on the arc-shaped flat tube passing through the first-pass cross section forming roller, wherein the major diameter of the arc-shaped flat tube is continuously prolonged, the minor diameter of the arc-shaped flat tube is uniformly shortened, and the cross section of the arc-shaped flat tube gradually approaches to the cross section of the flat tube which is finally required;
6) the section of the flat tube is finally formed, the arc-shaped flat tube which is subjected to the multi-pass section forming roller enters an nth-pass forming roller through a guide device, the working surface of the nth-pass forming roller is the same as the flat section of a finished part, and the section of the metal tube is rolled into the finally required flat tube section after the multi-pass section forming roller;
7) the workpiece is shaped, the normal distance from the center distance of the front n-1 pairs of forming rollers to the working surface of the forming rollers is adjusted to be the same as the small diameter of the flat tube, and 1-2 circles of circle correction are carried out on the flat tube;
8) and taking down the workpiece, adjusting the center distance of the forming roller pair, and taking out the processed workpiece.
The invention has the beneficial effects that:
the invention uses one device to realize two processing steps of roll bending ring formation and flat section forming by one-time installation, thereby effectively reducing the processing time and the processing cost of the annular flat tube. The annular shape of the flat tube is well ensured while the operation difficulty of workers is reduced by guidance among passes in the machining process.
The invention integrates the functions of roll bending forming and flat tube section forming on the same equipment, further reduces the occupied space of the equipment through reasonable space layout of the annular rack, and saves the site cost for factories; the invention adopts the dispersive multi-power technology, effectively simplifies the mechanical complexity of the processing device and reduces the design and calculation difficulty of mechanical parts.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of the roll bending system of the present invention.
FIG. 3 is a sectional view of the final forming roll assembly of the present invention.
Fig. 4 is a schematic view of the operation of the final forming roll of the present invention.
FIG. 5 is a schematic sectional view of the flat tube of the present invention.
FIG. 6 is a schematic view of the assembly of the parts of the inter-pass guide of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Referring to fig. 1, the device for integrally forming the annular flat tube comprises a section preforming system, a roll bending system, a multi-pass roll flattening forming roll and a inter-pass guide device, wherein the output of the section preforming system is matched with the input of the roll bending system, the output of the roll bending system is sequentially provided with the multi-pass roll flattening forming roll, and the inter-pass guide device for guiding the workpiece to move is distributed among the multi-pass roll flattening forming rolls.
Referring to fig. 1, in order to ensure that a workpiece to be machined horizontally enters a roll bending system and take structural balance into consideration, the cross section preforming system comprises two pairs of preforming rollers 1, a first guide roller 21 is arranged between the two pairs of preforming rollers 1, and the first guide roller 21 is installed on a frame 6; each pre-forming roller 1 is driven by a first servo motor 2, a rotor of the first servo motor 2 is connected with a first stepped shaft 4 through a first coupler 3, a pair of bearings are arranged on the first stepped shaft 4, the outer rings of the bearings are matched with a first sleeve 5, and the first sleeve 5 is arranged on a frame 6; 4 ends of first step shaft pass through the key-type connection and advance former 1, and 1 one end of advance former is fixed a position by the shaft shoulder of first step shaft 4, and the former 1 other end is fixed a position with the retaining ring, and the working surface of advance former 1 is the face of cylinder, and its effect is for making into the flat tube of changing the roll bending annular to the pipe preliminary working.
Referring to fig. 1 and 2, the roll bending system comprises a vertical downward-adjusting three-roll bending device formed by a first fixed roll 7 with a power source, a second fixed roll 9 and a follow-up roll 8 without the power source, wherein the follow-up roll 8 is controlled by a second servo motor 11 to move radially, the follow-up roll 8 is installed on a first guide block 10, two sides of the first guide block 10 are in transition fit with a rack 6, one end of the first guide block 10 is provided with the second servo motor 11 for driving the first guide block 10, a first connecting rod 12 between the second servo motor 11 and the first guide block 10 is provided with external threads, and a thread pair is arranged between the first connecting rod 12 and the rack 6; after receiving the control signal, the second servo motor 11 drives the first connecting rod 12 to rotate, and the rotating motion of the first connecting rod 12 is converted into the linear motion of the first guide block 10 connected with the first connecting rod through the thread pair, so that the radian of a common tangent line among the first fixed roller 7, the second fixed roller 9 and the follow-up roller 8 is finely adjusted, and the radian of a workpiece after the rollers are bent is further adjusted.
Referring to fig. 1, 3, 4 and 5, the multi-pass roll flattening forming roll comprises 4 pairs of forming rolls, wherein the first forming roll 14, the second forming roll 15, the third forming roll 16 and the final forming roll 17 are arranged in a roll bending system in sequence, the forming rolls have the same section, the center distances of the forming rolls are uniformly changed along with the section shapes, the working surfaces of the first forming roll 14, the second forming roll 15 and the third forming roll 16 are cylindrical surfaces, the final forming roll 17 is composed of an upper roll 17a and a lower roll 17b, the working surfaces are consistent with the outer surfaces of flat tubes 35, and the overall appearance 35a and the section shape 35b of the flat tubes 35 of the target workpiece are shown in fig. 5.
Referring to fig. 1 and 3, the forming rolls of the 4 pairs are assembled in the same relation as the final forming roll 17, the final forming roll 17 is mounted on the second stepped shaft 18, one end is positioned by the third retainer 33 and tightened by the nut 34, and the other end is positioned by the shoulder of the second stepped shaft 18; two bearings are assembled in the middle of the second step shaft 18, the outer ring of the bearing is assembled in a second sleeve 19, and the second sleeve 19 is assembled on the frame 6; the other end of the second step shaft 18 is connected with a third servo motor 38 through a second coupling 20; the second stepped shaft 18 is assembled on the second guide block 27, the second guide block 27 is assembled on the frame 6, one end of the second guide block 27 is provided with a threaded second connecting rod 36, the other end of the second connecting rod 36 is connected with a fourth servo motor 26 through a third coupler 37, the fourth servo motor 26 drives the second connecting rod 36 to rotate, and the rotary motion of the second connecting rod 36 is converted into the linear motion of the second guide block 27 connected with the second connecting rod through a thread pair, so that the center distance of the forming roller pair is adjusted.
Referring to fig. 1 and 6, the inter-pass guiding device 13 includes a third stepped shaft 28, the third stepped shaft 28 is connected to the frame 6 by cooperating with a bearing 29, one end of the third stepped shaft 28 is fixed to the frame 6 by a first retaining ring 30 and a nut 31, the other end of the third stepped shaft 28 is provided with a stepped sleeve 22, two ends of the stepped sleeve 22 are respectively positioned by a shoulder of the third stepped shaft 28 and a second retaining ring 32, and the inter-pass guiding devices 13 are uniformly distributed on the circumference of the frame 6.
The process of utilizing one kind of annular flat pipe forming apparatus includes the following steps:
1) blanking, the length L of the round metal pipe to be processed is pi R2Wherein R is the geometric neutral layer radius of the final workpiece;
2) the metal pipe is preformed, referring to fig. 1, the fixed-length metal round pipe passes through two pairs of preforming rollers, and the round section of the metal round pipe is preliminarily deformed into a flat section which is easily rolled into a ring;
3) the method comprises the following steps that flat metal pipes are subjected to roll bending, the preformed metal pipes pass through a roll bending system, referring to fig. 2, a first fixed roller 7 and a second fixed roller 9 rotate clockwise, a follow-up roller 8 rotates anticlockwise, the metal pipes pass through the first fixed roller 7, the follow-up roller 8 and the second fixed roller 9, and the metal pipes are processed into flat pipes with radian by a vertical downward-regulating three-roller roll bending device;
4) starting section processing, enabling the curved flat tube after roll bending to pass through a guide device between a roll bending forming roller and a first-pass section forming roller to enter the first-pass forming roller, and referring to fig. 6, setting that the flat section of the flat tube has a major diameter and a minor diameter, wherein the major diameter is a longer symmetrical line in a symmetrical axis of the flat section, and the major diameter is larger than the diameter of the section of an original circle; the small diameter is a shorter symmetrical line in the symmetrical axis of the flat section; the small diameter of the flat section is reduced after the first pass of section forming rolling;
5) processing a cross section, namely performing subsequent 2-time rolling forming on the arc-shaped flat tube passing through the first-time cross section forming roller, wherein the major diameter of the arc-shaped flat tube is continuously prolonged, the minor diameter of the arc-shaped flat tube is uniformly shortened, and the cross section of the arc-shaped flat tube gradually approaches to the cross section of the flat tube which is finally required;
6) finally forming the cross section of the flat tube, wherein the arc-shaped flat tube subjected to the multi-pass cross section forming roller enters a 4 th-pass forming roller through a guide device, the working surface of the 4 th-pass forming roller is the same as the flat cross section of the finished part, and referring to fig. 5, the cross section of the metal tube is rolled into a finally required flat tube cross section 35b after the multi-pass cross section forming roller;
7) and (3) setting the workpiece, and referring to fig. 1, controlling a fifth servo motor 23, a sixth servo motor 24 and a seventh servo motor 25 to adjust the normal distance from the center distance of the front 3 to the working surface of the forming roller to be the same as the small diameter of the flat tube, and performing 2-circle rounding on the flat tube. Referring to fig. 5, after 2 rounds of rounding, the metal tube profile is roll-bent into the final desired flattened tube profile 35 a;
8) and (3) taking down the workpiece, controlling a fifth servo motor 23, a sixth servo motor 24, a seventh servo motor 25 and a fourth servo motor 26 to increase the center distance of the forming roller pair, and taking out the processed workpiece.
Claims (2)
1. The utility model provides an annular flat tube integrated into one piece's device which characterized in that: the cross section pre-forming system is matched with the input of the roll bending system in output, the roll bending system is sequentially provided with the multi-pass roll flattening forming rollers in output, and the inter-pass guide devices for guiding the workpiece to move are distributed among the multi-pass roll flattening forming rollers;
the section preforming system comprises m pairs of preforming rollers (1), and the value range of m is 2-4; a first guide roller (21) is arranged between the m pairs of pre-forming rollers (1), and the first guide roller (21) is arranged on the frame (6); each pre-forming roller (1) is driven by a first servo motor (2), a rotor of the first servo motor (2) is connected with a first stepped shaft (4) through a first coupler (3), a first sleeve (5) is mounted on the first stepped shaft (4) through a bearing, and the first sleeve (5) is mounted on a rack (6); the end of the first stepped shaft (4) is connected with the preforming roller (1), and the working surface of the preforming roller (1) is a cylindrical surface;
the roll bending system comprises a vertical downward-adjusting three-roll bending device formed by a first fixed roll (7) with a power source, a second fixed roll (9) and a follow-up roll (8) without the power source, wherein the follow-up roll (8) is controlled by a second servo motor (11) to move radially; the follow-up roller (8) is arranged on a first guide block (10), two sides of the first guide block (10) are in transition fit with the rack (6), and the first guide block (10) is connected with an output shaft of a second servo motor (11) through a first connecting rod (12); the second servo motor (11) drives the first connecting rod (12) to rotate so as to drive the first guide block (10) to do linear motion, so that the radian of a common tangent line among the first fixed roller (7), the second fixed roller (9) and the follow-up roller (8) is finely adjusted, and the radian of a workpiece after the rollers are bent is further adjusted;
the multi-pass roll flattening forming roll comprises n pairs of forming rolls, and the forming rolls are mutually included at an angle
Are sequentially arranged behind the roll bending system; the working surface distance on the line of the centers of the symmetrical surfaces of the multi-pass forming rollers is changed along with the shape of the cross section, wherein the working surfaces of the front n-1 pairs of forming rollers are cylindrical surfaces, and finally the working surfaces of the nth pair of forming rollers are consistent with the outer surfaces of the flat tubes; the assembling relation of the n pairs of forming rollers is the same as that of the final forming roller (17), the final forming roller (17) is arranged on a second stepped shaft (18), the middle of the second stepped shaft (18) is connected with a second sleeve (19) through a bearing, and the second sleeve (19) is assembled on the frame (6); the other end of the second step shaft (18) is connected with a third servo motor (38) through a second coupler (20); the second step shaft (18) is assembled on a second guide block (27), and the second guide block (27) is assembled on the frame (6); one end of the second guide block (27) is provided with a second connecting rod (36) with threads, and the other end of the second connecting rod (36) is connected with a fourth servo motor (26) through a third coupler (37); the fourth servo motor (26) drives the second connecting rod (36) to rotate, and the rotary motion of the second connecting rod (36) is converted into the linear motion of a second guide block (27) connected with the second connecting rod through a thread pair, so that the center distance of the forming roller pair is adjusted;
the inter-pass guiding device (13) comprises a third stepped shaft (28), the third stepped shaft (28) is connected to the rack (6) through being matched with a bearing (29), one end of the third stepped shaft (28) is fixedly installed on the rack (6) through a first check ring (30) and a nut (31), the other end of the third stepped shaft (28) is provided with a stepped sleeve (22), two ends of the stepped sleeve (22) are positioned through a shaft shoulder of the third stepped shaft (28) and a second check ring (32), and the inter-pass guiding device (13) is uniformly distributed on the circumference of the rack (6).
2. A process for integrally forming an annular flat tube according to claim 1, comprising the steps of:
1) blanking, the length L of the round metal pipe to be processed is pi R2Wherein R is the geometric neutral layer radius of the final workpiece;
2) the metal pipe is preformed, the metal round pipe with fixed length passes through m pairs of preformed rollers (1), and the round section of the metal round pipe is preliminarily deformed into a flat section which is easy to roll and bend into a ring;
3) the method comprises the following steps that flat metal pipes are subjected to roll bending, the preformed metal pipes pass through a roll bending system, a first fixed roll (7) and a second fixed roll (9) rotate clockwise, a follow-up roll (8) rotates anticlockwise, the metal pipes pass through the first fixed roll (7), the follow-up roll (8) and the second fixed roll (9), and the metal pipes are processed into flat pipes with radian by utilizing a vertical downward-adjusting three-roll bending device;
4) starting section processing, wherein the curved flat tube enters a first-pass forming roller through a guide device between the roll bending forming roller and the first-pass section forming roller, the flat section of the flat tube is specified to have a major diameter and a minor diameter, the major diameter is a longer symmetrical line in a symmetrical axis of the flat section, and the major diameter is larger than the diameter of the section of an original circle; the small diameter is a shorter symmetrical line in the symmetrical axis of the flat section; the small diameter of the flat section is reduced after the first pass of section forming rolling;
5) processing a cross section, namely performing subsequent 2 nd to n-1 th roll forming on the arc-shaped flat tube passing through the first-pass cross section forming roller, wherein the major diameter of the arc-shaped flat tube is continuously prolonged, the minor diameter of the arc-shaped flat tube is uniformly shortened, and the cross section of the arc-shaped flat tube gradually approaches to the cross section of the flat tube which is finally required;
6) the section of the flat tube is finally formed, the arc-shaped flat tube which is subjected to the multi-pass section forming roller enters an nth-pass forming roller through a guide device, the working surface of the nth-pass forming roller is the same as the flat section of a finished part, and the section of the metal tube is rolled into the finally required flat tube section after the multi-pass section forming roller;
7) the workpiece is shaped, the normal distance from the center distance of the front n-1 pairs of forming rollers to the working surface of the forming rollers is adjusted to be the same as the small diameter of the flat tube, and 1-2 circles of circle correction are carried out on the flat tube;
8) and taking down the workpiece, adjusting the center distance of the forming roller pair, and taking out the processed workpiece.
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| CN202110359468.XA CN113118238B (en) | 2021-04-02 | 2021-04-02 | Integrated forming device and process for annular flat tubes |
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| CN202110359468.XA CN113118238B (en) | 2021-04-02 | 2021-04-02 | Integrated forming device and process for annular flat tubes |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB174107A (en) * | 1920-08-17 | 1922-01-17 | Forbes Tubular Products Corp | Improvements in and relating to the manufacture of tubular metal bodies |
| FR2824004B1 (en) * | 2001-04-30 | 2003-05-30 | Valeo Equip Electr Moteur | METHOD FOR MANUFACTURING AN ELECTRICALLY CONDUCTIVE WIRE AND DEVICE FOR CARRYING OUT SUCH A METHOD |
| CN202097271U (en) * | 2011-05-12 | 2012-01-04 | 江苏界达特异新材料股份有限公司 | Forming machine on production line for changing round pipes into square pipes |
| CN102284547B (en) * | 2011-06-23 | 2013-06-12 | 重庆大学 | Method for processing rectangular aluminum alloy waveguide through multi-pass rolling drawing |
| CN202387827U (en) * | 2011-12-05 | 2012-08-22 | 北方工业大学 | Roller bending forming device for expanded metal mesh |
| CN103753162B (en) * | 2014-01-17 | 2016-05-04 | 上海交通大学 | The roll forming device of ten hole micro-channel flat and manufacturing process |
| CN208866196U (en) * | 2018-07-04 | 2019-05-17 | 江苏安荣电气设备股份有限公司 | Pre-buried channel flow bender |
| CN209631883U (en) * | 2019-01-22 | 2019-11-15 | 福建坤孚股份有限公司 | A kind of magnesium alloy profiles apparatus for bending |
| CN210386958U (en) * | 2019-08-05 | 2020-04-24 | 武汉帝盟钢带工贸有限公司 | Alloy steel plate rolling mill device |
| CN111804778B (en) * | 2020-07-22 | 2022-07-01 | 山东深博巷道支护技术有限公司 | Numerical control one-step rapid forming arch camber system and working method |
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