CN110508979B - U-shaped assembling method for box beam - Google Patents
U-shaped assembling method for box beam Download PDFInfo
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- CN110508979B CN110508979B CN201910871527.4A CN201910871527A CN110508979B CN 110508979 B CN110508979 B CN 110508979B CN 201910871527 A CN201910871527 A CN 201910871527A CN 110508979 B CN110508979 B CN 110508979B
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- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
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Abstract
The U-shaped assembling method of the box beam comprises the steps that a workpiece to be assembled comprises two side plates and a frame body, the frame body comprises a bottom plate and a partition plate arranged on the bottom plate, the two side plates are firstly placed on the bottom plate and respectively stand on two sides of the partition plate, and then the two side plates and the frame body form a U-shaped rudiment; and a welding station is arranged, the U-shaped prototype is integrally conveyed forwards, different parts of the U-shaped prototype in the length direction are stopped at the welding station, and the U-shaped prototype is welded at the welding station after the U-shaped prototype is stopped, so that the U-shaped workpiece is integrally formed. According to the U-shaped assembling method for the box beam, disclosed by the invention, when the box beam is assembled, the U-shaped rudiment moves forwards, the assembling efficiency is high, and the workpiece can flow to a subsequent station after the assembly is facilitated.
Description
Technical Field
The invention relates to a U-shaped assembling method for box type beams.
Background
The cross section of the box beam is the same as the cross section of a common box, so the box beam is called. Generally comprises an upper cover plate, two side plates, a bottom plate and a partition plate. When the box-shaped beam is assembled, a U-shaped workpiece is assembled at first, the U-shaped workpiece comprises a frame body and two side plates, the frame body comprises a bottom plate and a partition plate arranged on the bottom plate, and the two side plates are respectively arranged on two sides of the partition plate in a vertical mode. In prior art, place two blocks of curb plates back on the bottom plate, form a U shape rudiment, this rudiment motionless, then spot welding is carried out between curb plate and the baffle through the spot welder or the manual work of removal, perhaps carries out spot welding between curb plate and the bottom plate and between curb plate and the baffle to make the rudiment of U shape form a whole.
The existing U-shaped assembly method of the box girder has the following defects: the U-shaped rudiment is static, the assembly efficiency is low, and the workpiece can not flow to the subsequent station after assembly.
Disclosure of Invention
In order to overcome the defects of a U-shaped assembly method of a box girder in the prior art, the invention provides a U-shaped assembly method of a box girder with a movable U-shaped prototype.
The technical scheme for solving the technical problem is as follows: the U-shaped assembling method of the box beam comprises the steps that a workpiece to be assembled comprises two side plates and a frame body, the frame body comprises a bottom plate and a partition plate arranged on the bottom plate, the two side plates are firstly placed on the bottom plate and respectively stand on two sides of the partition plate, and then the two side plates and the frame body form a U-shaped rudiment;
and a welding station is arranged, the U-shaped prototype is integrally conveyed forwards, different parts of the U-shaped prototype in the length direction are stopped at the welding station, and the U-shaped prototype is welded at the welding station after the U-shaped prototype is stopped, so that the U-shaped workpiece is integrally formed.
Further, welding is carried out between the side plate and the partition plate at the welding station, or welding is carried out between the side plate and the bottom plate and between the side plate and the partition plate.
Further, the conveying is stopped when the partition board approximately reaches the welding station, and the welding operation is performed.
Further, the welding is spot welding.
Further, spot welding is carried out manually or by a spot welding machine during spot welding.
Further, the two side plates are held by a positioning device so as to keep the two side plates standing on the side.
Further, after the U-shaped rudiment stops, the U-shaped rudiment is corrected.
Further, the corrective measures include the following measures or a combination of the following measures:
applying a downward pressure to the U-shaped rudiment;
applying an ejecting force to the U-shaped rudiment;
and correcting two side plates of the U-shaped prototype.
Furthermore, the two side plates of the U-shaped rudiment are corrected by a strong magnet.
Further, when the U-shaped prototype is sent forwards, the U-shaped prototype is supported on a rotatable supporting roller, the supporting roller rotates and then conveys the U-shaped prototype forwards, the supporting roller is connected with a supporting roller driving device, and the supporting roller is driven by the supporting roller driving device to rotate.
Furthermore, the positioning device is arranged on the support frame.
Furthermore, the positioning device comprises two positioning frames, wherein the two positioning frames are respectively provided with an arm, and the two arms respectively hold one side plate.
Further, the holding arm is provided with a holding roller, and the side plate is held by the holding roller.
Further, the supporting arm can rotate to support the side plate after being approximately laid flat or erected, and the supporting arm is connected with a supporting arm driving mechanism for driving the supporting arm to rotate.
Furthermore, the arm supporting driving mechanism is an arm supporting oil cylinder or an arm supporting air cylinder hinged on the positioning frame.
Furthermore, the number of the support frames is at least two, each support frame is provided with a support roller and a positioning device, and adjacent support frames are connected with each other so that the support frames are connected into a whole;
after the U-shaped rudiment on one support frame is welded, the U-shaped rudiment on the other support frame immediately enters a ready-to-assemble state after moving.
Further, before reaching the welding station for welding, the ends of the frame body and the two side plates are first aligned.
Further, before reaching the welding station and welding, rise an alignment board earlier, the tip that two blocks of curb plates and support body reached naturally after the contact of U shape rudiment and alignment board in the transportation process forward aligns, and the tip of two blocks of curb plates and support body is carried forward again after aligning.
Further, before reaching the welding station and welding, rise an alignment board earlier, the tip that two blocks of curb plates and support body reached naturally after the contact of U shape rudiment and alignment board in the transportation process forward aligns, and the tip of two blocks of curb plates and support body is carried forward again after aligning.
The invention has the beneficial effects that: according to the U-shaped assembling method for the box beam, disclosed by the invention, when the box beam is assembled, the U-shaped rudiment moves forwards, the assembling efficiency is high, and the workpiece can flow to a subsequent station after the assembly is facilitated.
Drawings
Fig. 1 is a top view of the box beam U-shaped erection device.
Fig. 2 is a side view of the box beam U-shaped erection device.
Fig. 3 is a front view of the box beam U-assembly apparatus at the welding station.
Fig. 4 is a schematic structural view of the positioning device.
Fig. 5 is a schematic structural view of the end alignment mechanism.
Fig. 6 is a front view of the prototype U.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-6, in the method for assembling the U-shaped box beam, a workpiece to be assembled comprises two side plates 1 and a frame body, the frame body comprises a bottom plate 2 and a partition plate 3 arranged on the bottom plate 2, the two side plates 1 are firstly placed on the bottom plate 2, the two side plates 1 are respectively erected on two sides of the partition plate 3, and at the moment, the two side plates 1 and the frame body form a U-shaped rudiment.
And a welding station is arranged, the U-shaped prototype is integrally conveyed forwards, different parts of the U-shaped prototype in the length direction are stopped at the welding station, and the U-shaped prototype is welded at the welding station after the U-shaped prototype is stopped, so that the U-shaped workpiece is integrally formed.
When welding is performed at the welding station, the side plate 1 and the partition plate 3 may be welded, the side plate 1 and the bottom plate 2 may be welded, and the side plate 1 and the bottom plate 2 and the side plate 1 and the partition plate 3 may be welded. Generally, the welding is spot welding.
In this embodiment, the above steps are implemented by the box beam U-shaped assembling device, and the box beam U-shaped assembling device is adopted for assembling. The U-shaped assembling equipment for the box-shaped beam comprises a support frame 4, a supporting roller 5 is arranged on the support frame 4, the supporting roller 5 is rotatably connected onto the support frame 4, the U-shaped prototypes are placed on the supporting roller 5, and the U-shaped prototypes can be conveyed forwards when the supporting roller 5 rotates. Of course, the support roller 5 needs a support roller driving device to drive the support roller so as to rotate the support roller 5. The back-up roll driving device can adopt various driving devices, such as a belt driving mechanism, a chain driving mechanism and the like, and in the embodiment, the back-up roll driving device adopts the form of a chain driving mechanism: the support roll driving mechanism comprises a support roll driving motor 6, the support roll driving motor 6 is connected with a first support roll so as to drive the first support roll to rotate, the support roll driving motor 6 can be directly connected with the first support roll, or can be connected by adopting a belt transmission mechanism or a chain transmission mechanism and the like, and all adjacent support rolls are connected by a transmission chain, so that the rotation of all the support rolls is realized.
In the process of moving the U-shaped prototype forwards, in order to prevent the U-shaped prototype from falling apart, the two side plates 1 can be held by a positioning device so as to keep the two side plates 1 standing on the side, and the positioning device is arranged on the support frame 4. In this embodiment, the positioning device includes two positioning frames, two holding arms 8 are respectively disposed on the two positioning frames, and the two holding arms 8 respectively hold one side plate 1. As a preferable mode, the supporting arm 8 is provided with a supporting roller, the supporting roller supports the side plate 1, the supporting arm 8 can rotate so as to support the side plate 1 after being approximately laid flat or erected, the supporting arm 8 is connected with a supporting arm driving mechanism 9 for driving the supporting arm to rotate, and the supporting arm driving mechanism 9 is a supporting arm oil cylinder or a supporting arm air cylinder hinged on the positioning frame in the embodiment.
Simultaneously, in order to make the purpose of U shape rudiment reach the automatic centering and adapt to the purpose of the U shape rudiment of different width, positioner's two locating racks slide and set up the support frame on to but the locating rack lateral sliding, two locating racks are the slip in opposite directions or carry on the back mutually when sliding simultaneously, for reaching this purpose, can adopt following structure: the two positioning frames are called a first positioning frame 7 and a second positioning frame 12, the first positioning frame 7 and the second positioning frame 12 are symmetrical about a longitudinal central line of the support frame 4, the rear end of the first positioning frame 7 is connected with one end of a first rope 10, the first rope 10 penetrates through the second positioning frame 12 and then is connected with the rear end of the second positioning frame 12, and the first rope 10 is tensioned on the support frame; the front end of the first positioning frame 7 is connected with one end of a second rope 11, the other end of the second rope 11 is connected with the front end of a second positioning frame 12, and the second rope 11 is tensioned on the supporting frame. Thereby can drive first locating rack 7 and the second locating rack 12 and slide in opposite directions and draw close each other with the second locating rack after first rope 10 or the operation of second rope 11, thereby perhaps drive first locating rack 7 and the second locating rack 12 and slide mutually away from each other and keep away from each other with second locating rack 12 with first locating rack 7. In this embodiment, the first rope 10 and the second rope 11 are both chains, and then the first chain wheel and the second chain wheel are arranged on the support frame 4, the first rope 10 is tensioned on the first chain wheel, the second rope is tensioned on the second chain wheel, and at the same time, the first chain wheel or the second chain wheel is further connected with a rope driving device (such as a driving motor, etc.), so that the first chain wheel or the second chain wheel is rotated, and the first rope 10 and the second rope 11 are driven to operate. Of course, the first rope 10 and the second rope 11 are not limited to the form of a chain, but may also be in the form of a belt, for example, in which case a pulley is provided on the support frame 4 for tensioning the first rope and the second rope, and a driving device is also required for driving the pulley to rotate. Or the rope driving device is a reciprocating driving device which is directly connected with the first positioning frame 7 or the second positioning frame 12, so that the first positioning frame 7 or the second positioning frame 12 is driven to naturally drive the first rope 10 and the second rope 11 to operate, and in the embodiment, the rope driving device is a rope driving cylinder 31 which operates.
First locating rack 7 and second locating rack 12 are kept away from each other and are put the U rudiment on backing roll 5, then first locating rack 7 and second locating rack 12 are close to each other and can hold up the location with the U rudiment side to because first locating rack 7 and second locating rack 12 are symmetrical about the vertical central line of support frame 4, consequently the U rudiment is held up the central point that is in support frame 4 after the location by the side. Meanwhile, the distance between the first positioning frame 7 and the second positioning frame 12 is variable, so that the device can adapt to U-shaped prototypes with different widths.
The U-shaped assembling equipment for the box-shaped beams further comprises a bearing frame 13 positioned in front of the support frame 4, the bearing frame 13 is used for bearing the U-shaped prototypes conveyed forwards, and the welding station is positioned on the bearing frame 13. In this embodiment, the receiving frame 13 is provided with a receiving roller 14 for receiving the U-shape blank. In this embodiment, the number of the receiving rollers 14 is at least two, the first receiving roller is connected with the receiving roller driving motor, the adjacent receiving rollers are connected through the chain transmission mechanism, and the receiving roller driving motor can drive each receiving roller 14 to rotate after being driven, so that the forward movement of the U-shaped prototypes is facilitated.
It is recommended to stop the transport when the partition 3 substantially reaches the welding station, and to perform the welding operation, which can obtain more favorable welding position and welding space. During spot welding, spot welding can be performed manually or by a spot welding machine.
Preferably, after the U-shaped blank is stopped, the U-shaped blank is corrected, namely the deformation of the U-shaped blank is corrected. The corrective measures may include the following measures or a combination of the following measures:
1. exert down force to the rudiment of U shape, for this embodiment, the form that realizes down force is: the first lifting mechanism 15 is arranged on the bearing frame 13, the first lifting mechanism 15 is connected with the lower pressing frame 16, the lower pressing frame 16 is provided with the lower pressing roller 17, the first lifting mechanism 15 drives the lower pressing roller 17 to press downwards until the lower pressing roller 17 presses on the U-shaped prototype, and upwarping deformation of the U-shaped prototype can be corrected.
2. The U-shape parison is subjected to a top force, for this embodiment, the form of the downforce achieved is: the bearing frame 13 is provided with a second lifting mechanism 18, the second lifting mechanism 18 is connected with a top frame 19, the top frame 19 is provided with a top roller 20, the second lifting mechanism 18 drives the top roller 20 to be pushed upwards until the top roller 20 is pushed against the U-shaped prototype, and the lower arch deformation of the U-shaped prototype can be corrected.
3. The two side plates of the U-shaped blank are corrected through the powerful magnets 21, specifically, the receiving frame 13 is provided with two left and right third lifting mechanisms 22, the two third lifting mechanisms 22 are respectively connected with the two left and right correcting frames 23, the two left and right correcting frames 23 are respectively provided with a transverse moving driving mechanism 24, the output ends of the transverse moving driving mechanisms 24 are respectively connected with the powerful magnets 21, the two third lifting mechanisms 22 drive the two correcting frames 23 to move to proper heights, so that the two powerful magnets 21 are respectively basically aligned with the centers of the two side plates 1, then the two transverse moving driving mechanisms 24 respectively drive the two powerful magnets 21 to move towards the two side plates 1, and the two powerful magnets 21 are respectively contacted with the two side plates 1 to generate powerful suction force so as to correct the deformation of the side plates 1.
The first lifting mechanism 15, the second lifting mechanism 18, the third lifting mechanism 22 and the traverse driving mechanism 24 may be cylinders or air cylinders, or other reciprocating driving devices, such as screw rod mechanisms, rack and pinion mechanisms, electric push rods, etc.
In this embodiment, the number of the support frames 4 is at least two, each support frame 4 is provided with a support roller 5 and a positioning device, and the adjacent support frames are connected with each other to form a whole. After the U-shaped rudiment on one support frame 4 is welded, the U-shaped rudiment on the other support frame 4 immediately enters a state of being ready for assembly after moving. Of course, the whole of each support frame 4 needs to have a support frame driving device to drive it to move, usually, a guide rail 25 needs to be provided to make the whole of each support frame be arranged on the guide rail 25 for convenient movement, and the support frame driving device can adopt an oil cylinder or an air cylinder, or other reciprocating driving devices, such as a screw rod mechanism, a rack and pinion mechanism, an electric push rod, etc.
In addition, it is recommended that the ends of the frame body and the two side plates 1 are first aligned before reaching the welding station for welding. In this embodiment, the specific implementation manner of aligning the end portions of the frame body and the two side plates 1 is as follows: before the blank reaches a welding station for welding, an alignment plate 26 is lifted firstly, the U-shaped blank naturally reaches the end parts of the two side plates 1 and the frame body to be aligned after being touched with the alignment plate 26 in the forward conveying process, and the two side plates 1 and the frame body are conveyed forwards after being aligned with the end parts. The concrete structure of realizing that the tip to support body and both sides board 1 aligns does: the window is arranged on the bearing frame 13, the aligning plate 26 is arranged below the window, the aligning plate 26 is connected with a fourth lifting mechanism for driving the fourth lifting mechanism to lift, the fourth lifting mechanism drives the aligning plate 26 to extend upwards out of the window, so that the U-shaped rudiment can be blocked, and the end parts of the two side plates 1 and the frame body are aligned. The fourth lifting mechanism can adopt an oil cylinder, an air cylinder or other reciprocating driving devices, such as a screw rod mechanism, a gear rack mechanism, an electric push rod and the like. In this embodiment, the fourth lifting mechanism includes a first swing arm 27, a second swing arm 28, and a transverse fourth cylinder 29, the upper end of the first swing arm 27 is hinged to the front end of the alignment plate 26, the upper end of the second swing arm 28 is hinged to the rear end of the alignment plate 26, the middle of the first swing arm 27 and the middle of the second swing arm 28 are both hinged to the receiving frame 13, the lower end of the first swing arm 27 is connected to the lower end of the second swing arm 28 through a connecting rod 39, the two ends of the connecting rod 30 are respectively hinged to the lower end of the first swing arm 27 and the lower end of the second swing arm 28, and the fourth cylinder 29 is hinged to the lower end of the first swing arm 27 or the lower end of the second swing arm 28, when the fourth cylinder 29 is actuated to push and pull, the first swing arm 27 and the second swing arm 28 are driven to synchronously rotate around the hinge point of the respective middle portions, so as to drive the alignment plate 26 to lift.
Claims (13)
1. The U-shaped assembling method of the box beam comprises the following steps that a workpiece to be assembled comprises two side plates and a frame body, the frame body comprises a bottom plate and a partition plate arranged on the bottom plate, and the U-shaped assembling method of the box beam is characterized in that: firstly, placing two side plates on a bottom plate, wherein the two side plates are respectively erected on two sides of a partition plate, and the two side plates and a frame body form a U-shaped embryonic shape;
setting a welding station, conveying the whole U-shaped prototype forward, stopping different parts of the U-shaped prototype in the length direction at the welding station, and welding the U-shaped prototype at the welding station after the U-shaped prototype is stopped, thereby forming the whole U-shaped workpiece;
the two side plates are held by a positioning device so as to keep the two side plates standing on the side;
after the U-shaped rudiment stops, the U-shaped rudiment is corrected, and the correction measures comprise all three measures as follows:
applying a downward pressure to the U-shaped rudiment;
applying an ejecting force to the U-shaped rudiment;
correcting two side plates of the U-shaped prototype through a strong magnet;
when the U-shaped prototype is sent forwards, the U-shaped prototype is supported on a rotatable supporting roller, the supporting roller rotates and then conveys the U-shaped prototype forwards, the supporting roller is connected with a supporting roller driving device, and the supporting roller is driven by the supporting roller driving device to rotate.
2. A method of U-shaped erection of box beams according to claim 1, characterized in that: and welding the side plates and the partition plates at a welding station, or welding the side plates and the bottom plate and the partition plates.
3. A method of U-shaped erection of box beams according to claim 2, characterized in that: and stopping conveying when the partition plate reaches the welding station, and performing welding operation.
4. A method of U-shaped erection of box beams according to claim 2, characterized in that: the welding is spot welding.
5. A method of U-shaped erection of box beams according to claim 4, characterized in that: and spot welding is carried out manually or by a spot welding machine during spot welding.
6. A method of U-shaped erection of box beams according to claim 1, characterized in that: the positioning device is arranged on the support frame.
7. A method of U-shaped erection of box beams according to claim 6, characterized in that: the positioning device comprises two positioning frames, wherein the two positioning frames are respectively provided with an arm, and the two arms respectively hold one side plate.
8. A method of U-shaped erection of box beams according to claim 7, characterized in that: the supporting arm is provided with a supporting roller, and the side plate is supported by the supporting roller.
9. A method of U-shaped erection of box beams according to claim 7, characterized in that: the supporting arm can rotate so as to support the side plate after being laid flat or erected, and is connected with a supporting arm driving mechanism for driving the supporting arm to rotate.
10. A method of U-shaped erection of box beams according to claim 9, characterized in that: the arm supporting driving mechanism is an arm supporting oil cylinder or an arm supporting air cylinder hinged on the positioning frame.
11. A method of U-shaped erection of box beams according to claim 6, characterized in that: the supporting frames are at least two, each supporting frame is provided with a supporting roller and a positioning device, and the adjacent supporting frames are connected with each other so that the supporting frames are connected into a whole;
after the U-shaped rudiment on one support frame is welded, the U-shaped rudiment on the other support frame immediately enters a ready-to-assemble state after moving.
12. A method of U-shaped erection of box beams according to any of claims 1-5, characterized in that: before reaching the welding station for welding, the frame body and the end parts of the two side plates are firstly aligned.
13. A method of U-shaped erection of box beams according to claim 12, characterized in that: before the welding station is reached for welding, an alignment plate is lifted firstly, the U-shaped rudiment naturally reaches the end alignment of the two side plates and the frame body after being touched with the alignment plate in the forward conveying process, and the two side plates and the frame body are conveyed forwards after being aligned with the end portions.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910871527.4A CN110508979B (en) | 2019-09-16 | 2019-09-16 | U-shaped assembling method for box beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910871527.4A CN110508979B (en) | 2019-09-16 | 2019-09-16 | U-shaped assembling method for box beam |
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| CN110508979A CN110508979A (en) | 2019-11-29 |
| CN110508979B true CN110508979B (en) | 2021-09-21 |
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| CN111822927B (en) * | 2020-08-05 | 2024-06-18 | 北京华巍中兴电气有限公司 | Barrel assembly device |
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| JP2006192487A (en) * | 2005-01-17 | 2006-07-27 | Jfe Steel Kk | Backing strip for electroslag welding, and electroslag welding method using the same |
| CN101954561A (en) * | 2009-07-17 | 2011-01-26 | 卫华集团有限公司 | Pai-shaped assembly tooling |
| CN203390469U (en) * | 2013-06-25 | 2014-01-15 | 浙江西子重工机械有限公司 | Equipment for assembling and welding box beam |
| CN206811392U (en) * | 2017-06-30 | 2017-12-29 | 河南省黄河防爆起重机有限公司 | A kind of box beam extrudes fixing device |
| CN107813146A (en) * | 2017-11-22 | 2018-03-20 | 上海振华重工(集团)股份有限公司 | Board material splice streamline and board material splice method |
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2019
- 2019-09-16 CN CN201910871527.4A patent/CN110508979B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006192487A (en) * | 2005-01-17 | 2006-07-27 | Jfe Steel Kk | Backing strip for electroslag welding, and electroslag welding method using the same |
| CN101954561A (en) * | 2009-07-17 | 2011-01-26 | 卫华集团有限公司 | Pai-shaped assembly tooling |
| CN203390469U (en) * | 2013-06-25 | 2014-01-15 | 浙江西子重工机械有限公司 | Equipment for assembling and welding box beam |
| CN206811392U (en) * | 2017-06-30 | 2017-12-29 | 河南省黄河防爆起重机有限公司 | A kind of box beam extrudes fixing device |
| CN107813146A (en) * | 2017-11-22 | 2018-03-20 | 上海振华重工(集团)股份有限公司 | Board material splice streamline and board material splice method |
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