CN107405714A - A kind of tube-forming machine and its gas protection system - Google Patents
A kind of tube-forming machine and its gas protection system Download PDFInfo
- Publication number
- CN107405714A CN107405714A CN201480083998.4A CN201480083998A CN107405714A CN 107405714 A CN107405714 A CN 107405714A CN 201480083998 A CN201480083998 A CN 201480083998A CN 107405714 A CN107405714 A CN 107405714A
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- CN
- China
- Prior art keywords
- gas
- pipe
- fixing hole
- pipe section
- welding
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/70—Other constructional features of yarn-winding machines
- B65H54/72—Framework; Casings; Coverings
Abstract
A kind of tube-forming machine and its gas protection system；The gas protection system (11) includes first gas protection mechanism (110); first gas protection mechanism (110) includes the first pipeline section (111); length direction of first pipeline section (111) along metal sheet is set; and the second precalculated position after both sides of the edge (101) pairing and being in inside metal pipe material is extended to from the first precalculated position before the pairing of both sides of the edge (101), and then provide welding protection gas to the second precalculated position.By the above-mentioned means, the welding protection gas of abundance can be provided, avoid in the outside offer welding protection gas of metal pipe material, because air pressure caused by welding hinders welding protection gas to reach at welding position, so as to influence welding effect.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of welding, in particular to a pipe forming machine and a gas protection system thereof.
[ background of the invention ]
During the welding process, it is often necessary to add a weld shielding gas. In the prior art, the welding shielding gas is usually disposed on the same side as the welding torch, and thus the welding shielding gas is supplied to the welding position. For example, when an article having a tubular structure is formed from a metal sheet, the two sides of the metal sheet are bent toward each other and aligned, and then the aligned positions are welded by a welding gun. In the prior art, the pipe section for providing the welding shielding gas is usually arranged outside the tubular structure, and the welding shielding gas is provided at the same time of welding.
However, during welding, gas pressure is generated in the opposite direction to the welding location, which generates an opposite pressure to the welding shielding gas supplied to the pipe section at the same side position as the welding torch, reducing the shielding gas reaching the welding location, thereby degrading the welding quality.
[ summary of the invention ]
The invention mainly solves the technical problem of providing a pipe forming machine and a gas protection system thereof, which can provide sufficient protective gas so as to improve the welding quality.
In order to solve the technical problems, the invention adopts a technical scheme that: the gas protection system is characterized by comprising a first gas protection mechanism, wherein the first gas protection mechanism comprises a first pipe section, the first pipe section is arranged along the length direction of the metal sheet, and extends from a first preset position before the two side edges are closed to a second preset position inside the metal pipe after the two side edges are closed, so that welding protection gas is provided for the second preset position.
Wherein the second predetermined position is a position at which the two side edges are welded or is located upstream of the position at which the two side edges are welded.
The first gas protection mechanism further comprises a second pipe section, the second pipe section is connected with the first pipe section at a first preset position and is arranged in a bending mode relative to the first pipe section, and welding protection gas is transmitted to the first pipe section through the second pipe section.
The gas protection system further comprises a pipe section fixing mechanism, the pipe section fixing mechanism comprises a bottom and a top which are parallel to each other, the pipe section fixing mechanism further comprises a connecting portion for connecting the bottom and the top, the bottom is fixed on the fixing table, the top is provided with a fixing hole, and the second pipe section penetrates through the fixing hole to be fixed through the fixing hole.
Wherein, a slot is arranged on the top, the slot is communicated with the fixed hole to clamp the second pipe section with the outer diameter larger than the inner diameter of the fixed hole.
The gas protection system further comprises a second gas protection mechanism, the second gas protection mechanism comprises a third pipe section and a fourth pipe section, the third pipe section is located at the downstream of the position where the edges on the two sides are welded and sleeved on the periphery of the metal pipe, and the fourth pipe section is communicated with the third pipe section and provides welding protection gas between the third pipe section and the metal pipe.
The second gas protection mechanism further comprises a fixing block, a first fixing hole is formed in the fixing block, the third pipe section is fixedly inserted into the first fixing hole, a through hole is formed in the side wall, located inside the first fixing hole, of the third pipe section, a second fixing hole is further formed in the fixing block and communicated with the through hole, the fourth pipe section is fixedly inserted into the second fixing hole, and welding protection gas is provided between the third pipe section and the metal pipe through the through hole.
Wherein the welding shielding gas comprises unit gas, binary mixed gas or ternary mixed gas.
The unit gas is argon or helium, the binary mixed gas is argon and/or helium mixed gas, or argon and carbon dioxide mixed gas, or argon and helium mixed gas, or argon and hydrogen mixed gas, and the ternary mixed gas is helium, argon and nitrogen mixed gas.
In order to solve the technical problems, the invention adopts a technical scheme that: providing a pipe forming machine, wherein the pipe forming machine is used for gradually closing the edges of two sides of a metal sheet in the width direction along the length direction of the metal sheet so as to form a metal pipe, and welding the closed edges of the two sides; the pipe forming machine comprises a gas protection system and a pipe collecting system, wherein the gas protection system comprises a first gas protection mechanism, the first gas protection mechanism comprises a first pipe section, the first pipe section is arranged along the length direction of the metal sheet, extends from a first preset position before the involution of the edges of the two sides to a second preset position after the involution of the edges of the two sides and in the metal pipe, and further provides welding protection gas for the second preset position; the pipe collecting system comprises a first support, a rotary table, a second support, a pressing wheel and a transmission mechanism, wherein the rotary table and the pressing wheel are respectively rotatably supported on the first support and the second support, the transmission mechanism drives the rotary table to rotate around a first rotating shaft, the rotary table comprises an annular supporting part arranged around the first rotating shaft, the outer peripheral surface of the pressing wheel is provided with a groove for receiving a metal pipe, the pressing wheel presses the metal pipe on the outer peripheral surface of the annular supporting part of the rotary table, and rotates synchronously around a second rotating shaft parallel to the first rotating shaft along with the rotary table, so that the metal pipe is wound on the outer peripheral surface of the annular supporting part, and the pressing wheel further pushes the metal pipe wound on the outer peripheral surface of the annular supporting part to one side of the annular supporting part along the setting direction of the first rotating shaft.
Wherein the second predetermined position is a position at which the two side edges are welded or is located upstream of the position at which the two side edges are welded.
The first gas protection mechanism further comprises a second pipe section, the second pipe section is connected with the first pipe section at a first preset position and is arranged in a bending mode relative to the first pipe section, and welding protection gas is transmitted to the first pipe section through the second pipe section.
The gas protection system further comprises a pipe section fixing mechanism, the pipe section fixing mechanism comprises a bottom and a top which are parallel to each other, the pipe section fixing mechanism further comprises a connecting portion for connecting the bottom and the top, the bottom is fixed on the fixing table, the top is provided with a fixing hole, and the second pipe section penetrates through the fixing hole to be fixed through the fixing hole.
Wherein, a slot is arranged on the top, the slot is communicated with the fixed hole to clamp the second pipe section with the outer diameter larger than the inner diameter of the fixed hole.
The invention has the beneficial effects that: different from the situation of the prior art, the gas protection system of the pipe forming machine comprises a first gas protection mechanism, the first gas protection mechanism comprises a first pipe section, the first pipe section is arranged along the length direction of a metal sheet and extends from a first preset position before the two side edges are closed to a second preset position after the two side edges are closed and positioned in the metal pipe, and then welding protection gas is provided for the second preset position, so that the welding protection gas can be provided in the metal pipe, sufficient welding protection gas can be provided, and the phenomenon that when the welding protection gas is provided outside the metal pipe, the welding protection gas is blocked by the gas pressure generated by welding to reach the welding position, and the welding effect is influenced is avoided.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a gas protection system of a pipe forming machine according to an embodiment of the present invention
FIG. 2 is a schematic diagram of a tube collection system of a tube forming machine according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of circle PN of the tubing collection system shown in FIG. 2.
[ detailed description ] embodiments
The embodiment of the invention provides a pipe forming machine which comprises a gas protection system and a pipe collecting system. Wherein the gas protection system is used for providing gas protection for the formed pipes during welding. The pipe collecting system collects the pipes transmitted by the gas protection system. In particular, the gas protection system is shown in fig. 1, and the tube collection system is shown in fig. 2 and 3.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a gas protection system of a pipe forming machine according to an embodiment of the present invention. The pipe forming machine 10 first gradually closes the two side edges in the width direction of the metal sheet 100 along the length direction of the metal sheet 100 to form the metal pipe 200, and then welds the closed two side edges 101 by the welding gun 13. Wherein the welding torch 13 is disposed outside the metal pipe 200.
The gas protection system 11 includes a first gas protection mechanism 110, the first gas protection mechanism 110 includes a first pipe section 111, the first pipe section 111 is disposed along the length direction of the metal sheet 100, and extends from a first predetermined position a before the two side edges 101 are involuted to a second predetermined position B after the two side edges 101 are involuted and located inside the metal pipe 200, so as to provide welding shielding gas to the second predetermined position B. Therefore, the embodiment can provide the shielding gas inside the metal pipe 200, and avoids the problem that the welding shielding gas is obstructed to reach the welding position due to the gas pressure generated by welding when the welding shielding gas is provided outside the metal pipe 200, thereby affecting the welding effect.
The first predetermined position a may be a position at which the sheet metal 100 starts to be butted or an upstream position thereof. The second predetermined position B is a position where the both side edges 101 are welded or is located upstream of the position where the both side edges 101 are welded.
Wherein, the first gas protection mechanism 110 further comprises a second pipe segment 112, the second pipe segment 112 is connected with the first pipe segment 111 at a first predetermined position A and is arranged in a bending way relative to the first pipe segment 111, and the welding protection gas is transmitted to the first pipe segment 111 through the second pipe segment 112.
Further, the gas protecting system 11 further comprises a pipe segment fixing mechanism 120, wherein the pipe segment fixing mechanism 120 comprises a bottom portion 121 and a top portion 122 parallel to each other, and further comprises a connecting portion 123 connecting the bottom portion 121 and the top portion 122, wherein the bottom portion 121 is fixed on a fixing table (not shown). The top portion 122 is provided with a fixing hole 124, and the second pipe segment 112 passes through the fixing hole 124 to fix the second pipe segment 112 through the fixing hole 124.
Further, a slot 125 is provided in the top portion 122, and the slot 125 communicates with the fixing hole 124. This makes it possible to clamp a pipe section having an outer diameter larger than the inner diameter of the fixing hole 124, and improves the fixing flexibility.
Preferably, the slot 125 extends from an end of the top portion 122 far from the connecting portion 123 to the fixing hole 124, and the slot 125 has the same distance with two side edges 1221 of the top portion 122, wherein the two side edges 1221 are parallel to the extending direction of the slot 125, so that the pressure on the two sides of the slot 125 can be balanced.
The gas protecting system 11 further includes a second gas protecting mechanism 113, the second gas protecting mechanism 113 includes a third pipe section 114 and a fourth pipe section 115, wherein the third pipe section 114 is located downstream of the position B where the two side edges 101 are welded and is sleeved on the periphery of the metal pipe 200, the fourth pipe section 115 is communicated with the third pipe section 114, and welding shielding gas is provided between the third pipe section 114 and the metal pipe 200.
Further, the second gas protection mechanism 113 further includes a fixing block 116, a first fixing hole 117 is disposed on the fixing block 116, the third pipe segment 114 is inserted and fixed in the first fixing hole 117, a through hole (not shown) is disposed on a side wall of the third pipe segment 114 located inside the first fixing hole 117, a second fixing hole 118 is further disposed on the fixing block 116, the second fixing hole 118 is communicated with the through hole, the fourth pipe segment 115 is inserted and fixed in the second fixing hole 118, and then welding protection gas is provided between the third pipe segment 114 and the metal pipe 200 through the through hole.
The shielding gas in the embodiment of the present invention may be an inert gas or an active gas. Comprises unit gas, or binary mixed gas, or ternary mixed gas. The unit gas is preferably argon or helium, and the binary mixed gas is preferably a mixed gas of argon and helium, or a mixed gas of argon and carbon dioxide, or a mixed gas of argon and helium, or a mixed gas of argon and hydrogen. The ternary mixed gas is a mixed gas of helium, argon and nitrogen.
The metal tubing 200 of the present invention is connected to the tubing collection system of the tubing forming machine after the end of the third tube segment 114 distal from the welded second predetermined location B is extended, and collected by the tubing collection system. Please refer to fig. 2 for a specific structure of the tube collecting system.
As shown in fig. 2, the tube collecting system 12 of the tube forming machine of the present invention comprises a first support 121, a turntable 122, a second support 123, a pressure roller 124 and a transmission mechanism 125.
The turntable 122 and the pressure wheel 124 are respectively rotatably supported on the first bracket 121 and the second bracket 123. The transmission mechanism 125 drives the turntable 122 to rotate about the first rotation axis EF. The turntable 122 comprises an annular support 126 arranged about the first axis of rotation EF. The outer peripheral surface of the pressure roller 124 is provided with a groove 127 for receiving the gold tube 200, as shown in fig. 3. The pressure wheel 124 presses the metal pipe 200 on the outer peripheral surface of the annular support portion 126 of the turntable 122, and rotates synchronously with the turntable 122 around the second rotation axis AB parallel to the first rotation axis EF, so as to wind the metal pipe 200 on the outer peripheral surface of the annular support portion 126, and the pressure wheel 124 further pushes the metal pipe 200 wound on the outer peripheral surface of the annular support portion 126 to one side of the annular support portion 126 along the arrangement direction of the first rotation axis EF.
Wherein the transmission mechanism 125 includes a motor 1251, a belt 1252, and gears 1253, 1254. Wherein the motor 1251 provides a driving force to the gear 1253, so that the gear 1253 rotates to drive the gear 1254 through the belt 1252, and the gear 1254 further drives the turntable 122.
The groove 127 includes a bottom 1271 and two sides 1272, wherein the two sides 1272 are parallel to each other and perpendicular to the bottom 1271. Alternatively, both sides 1272 may form an obtuse angle with the bottom 1271 such that the recess 127 is outwardly flared.
The second bracket 123 is fixed to the first bracket 121, and is provided with an adjusting mechanism 128 for adjusting a distance between the first rotating shaft EF and the second rotating shaft AB. Specifically, when the diameter of the metal pipe 200 is increased, the adjusting mechanism 128 adjusts the interval between the first rotating shaft EF and the second rotating shaft AB to be increased, and when the diameter of the metal pipe 200 is decreased, the adjusting mechanism 128 adjusts the interval between the first rotating shaft EF and the second rotating shaft AB to be decreased.
Specifically, referring to fig. 3, the adjusting mechanism 128 includes a clamping portion 1281 and a propping portion 1282, wherein the clamping portion 1281 is fixed on the second bracket 123, and an elastic mechanism (not shown) is disposed between the second bracket 123 and the clamping portion 1281, and can provide an upward force to the clamping portion 1281. The second rotating shaft AB is inserted into the clamping part 1281 and can rotate relative to the clamping part 1281. The abutting portion 1282 is disposed on the top of the clamping portion 1281 and is used for pressing the clamping portion 1281. When the diameter of the metal pipe 200 becomes larger, the abutting portion 1282 moves upward, so that the clamping portion 1281 moves upward under the upward force provided by the elastic structure, thereby driving the second rotating shaft AB to move upward, that is, the interval between the first rotating shaft EF and the second rotating shaft AB becomes larger. When the diameter of the metal pipe 200 is smaller, the abutting portion 1282 moves downward, so that the clamping portion 1281 moves downward under the action of the force of the abutting portion 1282, and the second rotating shaft AB is driven to move downward, that is, the interval between the first rotating shaft EF and the second rotating shaft AB is smaller.
Wherein, the turntable 122 further comprises a plurality of support bars 129 fixed on one side of the annular support portion 126 and arranged around the first rotating shaft EF at intervals, and the pressure roller 124 further pushes the metal pipe 200 wound on the outer circumferential surface of the annular support portion 126 from the annular support portion 126 to the plurality of support bars 129.
Wherein the diameter of the outer circumferential surface of the annular support portion 126 is gradually reduced in a direction toward the support rod 129.
Therefore, the pipe collecting system 12 of the present embodiment can realize automatic collection of the metal pipes 200, improve efficiency, and provide uniformity of collection.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (14)
- The gas protection system of the pipe forming machine is characterized by comprising a first gas protection mechanism, wherein the first gas protection mechanism comprises a first pipe section, the first pipe section is arranged along the length direction of the metal sheet, extends from a first preset position before the two side edges are closed to a second preset position inside the metal pipe after the two side edges are closed, and further provides welding protection gas for the second preset position.
- The gas-protecting system of claim 1, wherein said second predetermined position is at or upstream of a location at which said two side edges are welded.
- The gas shielding system of claim 1, wherein the first gas shielding mechanism further comprises a second pipe segment connected to the first pipe segment at the first predetermined location and arranged bent with respect to the first pipe segment, the weld shielding gas being transmitted to the first pipe segment through the second pipe segment.
- The gas-protecting system of claim 3, further comprising a pipe segment-fixing mechanism including a bottom portion and a top portion parallel to each other, and further including a connecting portion connecting the bottom portion and the top portion, wherein the bottom portion is fixed to a fixing table, the top portion is provided with a fixing hole, and the second pipe segment passes through the fixing hole to fix the second pipe segment through the fixing hole.
- The gas-protecting system of claim 4, wherein a slot is provided in said top, said slot communicating with said fixing hole to retain a second pipe section having an outer diameter greater than the inner diameter of said fixing hole.
- The gas-protecting system of claim 1, further comprising a second gas-protecting mechanism, said second gas-protecting mechanism comprising a third pipe section and a fourth pipe section, wherein said third pipe section is located downstream of the location where the two side edges are welded and is sleeved on the periphery of said metal pipe, said fourth pipe section is in communication with said third pipe section and provides welding shielding gas between said third pipe section and said metal pipe.
- The gas protection system of claim 6, wherein the second gas protection mechanism further comprises a fixing block, the fixing block is provided with a first fixing hole, the third pipe section is inserted and fixed in the first fixing hole, a through hole is formed in a side wall of the third pipe section located inside the first fixing hole, the fixing block is further provided with a second fixing hole, the second fixing hole is communicated with the through hole, the fourth pipe section is inserted and fixed in the second fixing hole, and welding shielding gas is provided between the third pipe section and the metal pipe through the through hole.
- The gas shielding system of claim 1, wherein the welding shielding gas comprises a single gas, or a binary gas mixture, or a ternary gas mixture.
- The gas-protecting system of claim 8, wherein the unit gas is argon or helium, the binary mixture is a mixture of argon and nitrogen, or a mixture of argon and carbon dioxide, or a mixture of argon and helium, or a mixture of helium and nitrogen, and the ternary mixture is a mixture of helium, argon, and nitrogen.
- A pipe forming machine is characterized in that the pipe forming machine is used for gradually closing two side edges in the width direction of a metal sheet along the length direction of the metal sheet to form a metal pipe, and welding the closed two side edges;the pipe forming machine comprises a gas protection system and a pipe collecting system, wherein the gas protection system comprises a first gas protection mechanism, the first gas protection mechanism comprises a first pipe section, the first pipe section is arranged along the length direction of the metal sheet and extends from a first preset position before the two side edges are closed to a second preset position after the two side edges are closed and positioned in the metal pipe, and welding protection gas is further provided for the second preset position;the pipe collecting system comprises a first bracket, a turntable, a second bracket, a pressing wheel and a transmission mechanism, the turntable and the pressure wheel are respectively supported on the first bracket and the second bracket in a rotating way, the transmission mechanism drives the turntable to rotate around a first rotating shaft, the turntable comprises an annular supporting part arranged around the first rotating shaft, the outer peripheral surface of the pressing wheel is provided with a groove for receiving a metal pipe, the metal pipe is pressed on the outer peripheral surface of the annular supporting part of the turntable by the pressing wheel and synchronously rotates around a second rotating shaft parallel to the first rotating shaft along with the turntable, and further winding the metal pipe on the outer peripheral surface of the annular supporting part, and further pushing the metal pipe wound on the outer peripheral surface of the annular supporting part to one side of the annular supporting part along the arrangement direction of the first rotating shaft by the pressing wheel.
- The pipe forming machine of claim 10 wherein the second predetermined position is at or upstream of the location where the two side edges are welded.
- The pipe forming machine of claim 10 wherein the first gas shield mechanism further comprises a second pipe segment connected to the first pipe segment at the first predetermined location and arranged in a bent configuration relative to the first pipe segment, the weld shield gas being delivered to the first pipe segment through the second pipe segment.
- The pipe forming machine of claim 12, wherein the gas protection system further comprises a pipe segment fixing mechanism, the pipe segment fixing mechanism comprises a bottom portion and a top portion parallel to each other, and further comprises a connecting portion connecting the bottom portion and the top portion, wherein the bottom portion is fixed on the fixing table, the top portion is provided with a fixing hole, and the second pipe segment passes through the fixing hole to be fixed on the second pipe segment through the fixing hole.
- The pipe forming machine of claim 13 wherein a slot is provided in the top portion, the slot communicating with the fixing hole to retain a second pipe section having an outer diameter greater than the inner diameter of the fixing hole.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/096066 WO2016106754A1 (en) | 2014-12-31 | 2014-12-31 | Pipe forming machine and gas protection system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107405714A true CN107405714A (en) | 2017-11-28 |
| CN107405714B CN107405714B (en) | 2020-09-01 |
Family
ID=56284023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480083998.4A Active CN107405714B (en) | 2014-12-31 | 2014-12-31 | Pipe forming machine and gas protection system thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107405714B (en) |
| WO (1) | WO2016106754A1 (en) |
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| CN1692999A (en) * | 2004-05-07 | 2005-11-09 | 尼克桑斯公司 | Device for the continuous production of longitudinally seam welded metal tubes |
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| CN102990364A (en) * | 2011-09-15 | 2013-03-27 | 尼克桑斯公司 | Device for continuous production of metal tubes |
| CN203045122U (en) * | 2012-12-06 | 2013-07-10 | 汕头市合创贸易有限公司 | Argon arc welding device for welding metal welded tube |
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| KR100742204B1 (en) * | 2006-03-29 | 2007-07-25 | 동아금속주름관(주) | Welding apparatus of stainless steel pipe and welding method of the same |
| CN100491044C (en) * | 2007-11-23 | 2009-05-27 | 鞍钢建设集团有限公司 | Large caliber aluminium alloy pipeline non-pad tungsten electrode argon arc single face welding and double face shaping method |
| CN102107330A (en) * | 2009-12-28 | 2011-06-29 | 武汉楚天激光（集团）股份有限公司 | Tube forming machine tool for welding stainless steel tubes by way of continuous longitudinal-seam laser welding |
| CN203512950U (en) * | 2013-09-27 | 2014-04-02 | 浙江吉利控股集团有限公司 | Anti-winding cable winding device |
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- 2014-12-31 WO PCT/CN2014/096066 patent/WO2016106754A1/en active Application Filing
- 2014-12-31 CN CN201480083998.4A patent/CN107405714B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1692999A (en) * | 2004-05-07 | 2005-11-09 | 尼克桑斯公司 | Device for the continuous production of longitudinally seam welded metal tubes |
| CN1706582A (en) * | 2004-06-09 | 2005-12-14 | 尼克桑斯公司 | Process for the continuous production of longitudinally welded metal tubes |
| CN102990364A (en) * | 2011-09-15 | 2013-03-27 | 尼克桑斯公司 | Device for continuous production of metal tubes |
| CN102502363A (en) * | 2011-12-01 | 2012-06-20 | 中联重科股份有限公司 | Cable reel and crane comprising same |
| CN202667886U (en) * | 2012-05-25 | 2013-01-16 | 苏州沃鼎自动化系统有限公司 | Back shielding gas supply device applicable to welding of longitudinal seams and circumferential seams of long pipes |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107405714B (en) | 2020-09-01 |
| WO2016106754A1 (en) | 2016-07-07 |
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