CN112916675B - Bending angle adjusting mechanism for hydraulic plate bending machine - Google Patents
Bending angle adjusting mechanism for hydraulic plate bending machine Download PDFInfo
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- CN112916675B CN112916675B CN202110082382.7A CN202110082382A CN112916675B CN 112916675 B CN112916675 B CN 112916675B CN 202110082382 A CN202110082382 A CN 202110082382A CN 112916675 B CN112916675 B CN 112916675B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
- B21D5/045—With a wiping movement of the bending blade
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention relates to the technical field of hydraulic bending machines, and discloses a bending angle adjusting mechanism for a hydraulic plate bending machine, which comprises a mechanical frame, a clamping mechanism and a locking mechanism, wherein a supporting seat is fixedly mounted at the top end of the mechanical frame, a central column is fixedly mounted at the top end of the supporting seat, a pressure rod is movably mounted on the front surface of the central column, a hydraulic column is movably mounted in the supporting seat, a rotating plate is fixedly mounted at the top end of the hydraulic column, a pad seat is fixedly mounted at the bottom end of the rotating plate, the clamping mechanism is fixedly mounted at the top end of the supporting seat, and the locking mechanism is fixedly mounted on the front surface of the central column.
Description
Technical Field
The invention relates to the technical field of hydraulic bending machines, in particular to a bending angle adjusting mechanism for a hydraulic plate bending machine.
Background
The plate is generally straight due to the characteristics of the production process and wide actual requirements, but the plate needs to be bent according to requirements, and due to the problems of material size and the like of the plate, the plate cannot be bent manually and needs to be bent by using a hydraulic bending machine, but the hydraulic bending machine presses down from the middle of the plate by using downward pressure so as to bend the plate, and the bending mode needs manual visual inspection to adjust the descending depth, cannot well control the bending angle and causes the condition that the produced plate is not qualified.
Aiming at the defects of the prior art, the invention provides a bending angle adjusting mechanism for a hydraulic plate bending machine, which has the advantage of adjusting the bending angle according to requirements and solves the problem that the bending angle cannot be controlled.
Disclosure of Invention
In order to achieve the purpose of adjusting the bending angle according to the requirement, the invention provides the following technical scheme: the utility model provides an angle adjustment mechanism that bends for hydraulic pressure sheet material bender, constructs and the locking mechanism including mechanical frame, clamping, mechanical frame top fixed mounting has the supporting seat, supporting seat top fixed mounting has the center post, the positive movable mounting of center post has the depression bar, the inside movable mounting of supporting seat has the hydraulic pressure post, hydraulic pressure post top fixed mounting has the commentaries on classics board, commentaries on classics board bottom fixed mounting has the base, clamping mechanism fixed mounting is on the supporting seat top, the locking mechanism fixed mounting is positive at the center post.
As an optimization, the clamping mechanism comprises a lower pressing plate, a supporting column is fixedly mounted at the bottom end of the lower pressing plate, a fixed seat is fixedly mounted on the left side of the lower pressing plate, a sliding rod is fixedly mounted at the top end of the fixed seat, a lantern ring is sleeved on the outer side of the sliding plate, an upper pressing plate is fixedly mounted at the right end of the lantern ring, a screw is inserted into the upper pressing plate, and a fixing pad is fixedly mounted on one side of the upper pressing plate opposite to the lower pressing plate.
As the optimization, the locking mechanism includes a sealing barrel, the inside movable mounting of sealing barrel has the pivot, the one end fixed mounting that sealing barrel was kept away from in the pivot has the center pin, the equal movable mounting in both sides of center pin has the swivel, the left side of swivel and the equal fixed mounting in the left end outside of pivot have the closing plate, swivel bottom fixed mounting has the connection rope, the inside fixed mounting of supporting seat has the leading wheel, the other end fixed mounting who connects the rope has the reel, the reel outside has cup jointed the movable ring, movable ring outside fixed mounting has the ejector pin, the inside movable mounting of pivot has the removal stopper, the inside movable mounting of pivot has the sealing plug.
Preferably, the number of the central columns is two, the central columns are symmetrically arranged at the centers of the left side and the right side of the supporting plate, the clamping equipment is fixedly arranged at the left side of the central columns, the rotating plate is movably arranged at the right side of the central columns, the sealing cylinders are fixedly arranged at the opposite sides of the central columns, and the movable rings are located under the central shafts.
As an optimization, the lower pressing plate is fixedly connected with the central shaft, the rotating ring is fixedly connected with the rotating plate, the rotating shaft is movably installed inside the rotating ring, the sealing plate is embedded inside the sealing cylinder, the sealing plate isolates the inside of the sealing cylinder into two independent sealing air cavities, the inside of the sealing cylinder is filled with high-pressure nitrogen, when the two air cavities are connected together, the air pressure is communicated, the sealing plate can freely rotate, when the two air cavities are isolated, the air pressure is not communicated, and the sealing plate is fixed and cannot rotate.
Preferably, the movable plug and the sealing plug are composed of a partition plate, a movable block, an inserted link, a return spring and a piston, the inserted link is inserted into the partition plate, the inserted link is fixedly installed between the movable block and the piston, the piston is located on one side, away from the movable block, of the partition plate, the return spring in the movable plug is fixedly installed between the movable block and the partition plate, and the return spring in the sealing plug is fixedly installed between the partition plate and the piston.
As optimization, sealed air flue has all been seted up to center pin and pivot inside, the air vent has been seted up to pivot inside, sealed air flue links to each other with the air vent, remove the sealed air flue outlet department of stopper movable mounting in the center pin, sealing plug movable mounting is in the junction of sealed air flue and air vent, the piston is laminated mutually with sealed air flue inner wall, and when the air vent was stopped up by the sealing plug, two air cavitys in the sealed section of thick bamboo were separated, and the closing plate can't continue to rotate under the effect of atmospheric pressure, reaches fixed effect.
Preferably, threaded grooves are formed in the upper pressing plate and the lower pressing plate, the screws are inserted into the two threaded grooves, the sliding rod is L-shaped, a baffle is fixedly mounted at the left end of the sliding rod, the upper pressing plate is moved to the position of the transverse sliding rod along the sliding plate when no sheet material exists, the upper pressing plate is prevented from blocking feeding and moving the sheet material, the screws are screwed down, the upper pressing plate and the lower pressing plate are enabled to be close to each other, and the sheet material clamping effect is achieved.
The beneficial effects of the invention are: the method comprises the steps of placing a plate to be bent on a lower pressing plate and a rotating plate, sliding the upper pressing plate down along a sliding rod, aligning a screw on a thread groove of the lower pressing plate, screwing the upper pressing plate and the lower pressing plate through the screw to fix the plate, pressing down a pressing rod to enable the bottommost end of the pressing rod to be attached to the upper surface of the plate, rotating a movable ring to drive a mandril to rotate along with the movable ring, enabling a reel to be connected with the rotating plate through friction, enabling a connecting rope to be connected with the rotating plate through the connecting rope, enabling the rotating shaft center of the rotating plate to serve as a central shaft, enabling the connecting rope to bypass a guide wheel at the same time, achieving a certain positioning and length fixing effect for the connecting rope, utilizing the characteristic that the rotating plate rotates to drive the moving position of the connecting rope to determine the rotating angle corresponding to the movable ring, rotating the movable ring according to a required angle, enabling the mandril to reach the required position, enabling the mandril to be driven to start to move when a hydraulic column pushes the rotating plate to rotate, driving the connecting rope to be driven to start to move, driving the reel to rotate, enabling the movable ring to rotate, enabling the mandril to push a movable plug to plug under the action of air pressure to plug, and to plug into a sealing hole, and enabling the sealing plate to be separated from two sides of a rotating cylinder to achieve the purpose of fixing air cavity, and further enabling the sealing plate to be fixed to be separated, thereby achieving the purpose of the rotating cylinder to control the rotating angle of the rotating cylinder.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic view of a clamping mechanism according to the present invention;
FIG. 3 is a schematic view of the locking mechanism of the present invention;
FIG. 4 is a schematic view of a seal plate of the present invention;
fig. 5 is a schematic view of the connecting rope of the present invention.
In the figure: 1. a mechanical frame; 2. a clamping mechanism; 201. pressing the plate downwards; 202. a support pillar; 203. a fixed seat; 204. a slide bar; 205. a collar; 206. an upper pressure plate; 207. a screw; 208. a fixing pad; 3. a locking mechanism; 301. a sealing cylinder; 302. a rotating shaft; 303. a central shaft; 304. rotating the ring; 305. sealing plates; 306. connecting ropes; 307. a guide wheel; 308. a reel; 309. a movable ring; 310. a top rod; 311. Moving the plug; 312. a sealing plug; 4. a supporting base; 5. a central column; 6. a pressure lever; 7. a hydraulic column; 8. Rotating the plate; 9. a cushion seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1-2, a bending angle adjusting mechanism for a hydraulic plate bending machine comprises a mechanical frame 1, a clamping mechanism 2 and a locking mechanism 3, wherein a supporting seat 4 is fixedly installed at the top end of the mechanical frame 1, a central column 5 is fixedly installed at the top end of the supporting seat 4, a pressing rod 6 is movably installed on the front side of the central column 5, a hydraulic column 7 is movably installed inside the supporting seat 4, a rotating plate 8 is fixedly installed at the top end of the hydraulic column 7, a pad seat 9 is fixedly installed at the bottom end of the rotating plate 8, the clamping mechanism 2 is fixedly installed at the top end of the supporting seat 4, and the locking mechanism 3 is fixedly installed on the front side of the central column 5.
Referring to fig. 1-2, the clamping mechanism 2 includes a lower pressing plate 201, a supporting pillar 202 is fixedly mounted at the bottom end of the lower pressing plate 201, a fixing base 203 is fixedly mounted at the left side of the lower pressing plate 201, a sliding rod 204 is fixedly mounted at the top end of the fixing base 203, a sleeve ring 205 is sleeved on the outer side of the sliding plate, an upper pressing plate 206 is fixedly mounted at the right end of the sleeve ring 205, a screw 207 is inserted into the upper pressing plate 206, and a fixing pad 208 is fixedly mounted at both opposite sides of the upper pressing plate 206 and the lower pressing plate 201.
Referring to fig. 3-5, the locking mechanism 3 includes a sealing barrel 301, a rotating shaft 302 is movably mounted inside the sealing barrel, a central shaft 303 is fixedly mounted at one end of the rotating shaft 302 far away from the sealing barrel 301, swivel rings 304 are movably mounted on both sides of the central shaft 303, a sealing plate 305 is fixedly mounted on the left side of the swivel plate 8 and the left end outside of the rotating shaft 302, a connecting rope 306 is fixedly mounted at the bottom end of the swivel plate 8, a guide wheel 307 is fixedly mounted inside the supporting seat 4, a reel 308 is fixedly mounted at the other end of the connecting rope 306, a movable ring 309 is sleeved outside the reel 308, a top rod 310 is fixedly mounted on the outside of the movable ring 309, a movable plug 311 is movably mounted inside the rotating shaft 302, and a sealing plug 312 is movably mounted inside the rotating shaft 302.
Referring to fig. 1-5, the two center posts 5 are symmetrically installed at the centers of the left and right sides of the support plate, the clamping device is fixedly installed at the left side of the center post 5, the rotating plate 8 is movably installed at the right side of the center post 5, the sealing cylinder 301 is fixedly installed at the opposite side of the center post 5, and the movable ring 309 is located right below the central shaft 303.
Referring to fig. 3-5, the lower pressing plate 201 is fixedly connected to the central shaft 303, the rotary ring 304 is fixedly connected to the rotary plate 8, the rotary shaft 302 is movably installed inside the rotary ring 304, the sealing plate 305 is embedded inside the sealing cylinder 301, the sealing plate 305 separates the inside of the sealing cylinder 301 into two independent sealed air chambers, the inside of the sealing cylinder 301 is filled with high-pressure nitrogen, when the two air chambers are connected together, the air pressure is communicated, the sealing plate 305 can freely rotate, when the two air chambers are separated, the air pressure is not communicated, and the sealing plate 305 is fixed and cannot rotate.
Referring to fig. 3-5, the movable plug 311 and the sealing plug 312 are composed of a partition plate, a movable block, an insert rod, a return spring and a piston, the insert rod is inserted into the partition plate, the insert rod is fixedly installed between the movable block and the piston, the piston is located on one side of the partition plate away from the movable block, the return spring in the movable plug 311 is fixedly installed between the movable block and the partition plate, and the return spring in the sealing plug 312 is fixedly installed between the partition plate and the piston.
Referring to fig. 3-5, sealing air ducts are respectively formed inside the central shaft 303 and the rotating shaft 302, a vent hole is formed inside the rotating shaft 302, the sealing air ducts are connected with the vent hole, the movable plug 311 is movably mounted at an outlet of the sealing air duct in the central shaft 303, the sealing plug 312 is movably mounted at a joint of the sealing air duct and the vent hole, the piston is attached to an inner wall of the sealing air duct, when the vent hole is blocked by the sealing plug 312, two air chambers in the sealing cylinder 301 are separated, and the sealing plate 305 cannot continuously rotate under the action of air pressure, so that a fixing effect is achieved.
Referring to fig. 3-5, the upper pressing plate 206 and the lower pressing plate 201 are both provided with threaded grooves, the screws 207 are inserted into the two threaded grooves, the sliding rod 204 is L-shaped, the left end of the sliding rod 204 is fixedly provided with a baffle, when no sheet material exists, the upper pressing plate 206 is moved to the transverse sliding rod 204 along the sliding plate, the feeding and moving of the sheet material are prevented from being blocked by the upper pressing plate 206, and the screws 207 are screwed down to enable the upper pressing plate 206 and the lower pressing plate 201 to approach each other, so that the sheet material is clamped.
To sum up, the plate material to be bent is placed on the lower pressing plate 201 and the rotating plate 8, the upper pressing plate 206 slides down along the sliding rod 204, the screw 207 is aligned with the thread groove of the lower pressing plate 201, the upper pressing plate 206 and the lower pressing plate 201 are screwed through the screw 207, so that the plate material is fixed, the pressing rod 6 is pressed down, the bottommost end of the pressing rod 6 is attached to the upper surface of the plate material, the bending line of the plate material is determined, the plate material is prevented from being bent at other places, the angle is not suitable, the movable ring 309 is rotated, the top rod 310 is driven to rotate along with the movable ring 309, as the movable ring 309 is connected with the reel 308 through friction, the reel 308 is connected with the rotating plate 8 through the connecting rope 306, the center of the rotating shaft 302 of the rotating plate 8 is the central shaft 303, meanwhile, the connecting rope 306 needs to bypass the guide wheel 307, a certain positioning and length-fixing effect is achieved for the connecting rope 306, and the characteristics that the rotating plate 8 rotates to drive the connecting rope 306 to move and determine the position of the connecting rope 306, the corresponding rotation angle of the movable ring 309 is determined, the movable ring 309 is rotated according to a required angle, the push rod 310 is enabled to reach a required position, when the hydraulic column 7 pushes the rotary plate 8 to start rotating, because the rotary plate 8 is fixedly connected with the rotary ring 304, the rotation of the rotary ring 304 drives the sealing plate 305 to rotate in the sealing cylinder 301, because of the existence of the vent holes, the air cavities on the two sides are communicated, the sealing plate 305 can rotate freely, the connecting rope 306 is driven to start moving, the reel 308 is driven to start rotating, the reel 308 drives the movable ring 309 to rotate, when the push rod 310 rotates to the lower part of the central shaft 303, the push rod 310 pushes the movable plug 311 upwards, the sealing plug 312 is pushed into the vent hole under the action of air pressure to block the vent hole, the air pressures on the two sides in the sealing cylinder 301 are separated, and the sealing plate 305 cannot rotate, so as to achieve the purpose of fixing the rotary ring 304, the rotating plate 8 is fixed to achieve the purpose of controlling the bending angle.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (1)
1. The utility model provides a be used for hydraulic pressure sheet material bender angle adjustment mechanism of bending, constructs (2) and locking mechanism (3) including machinery frame (1), clamping, its characterized in that: the clamping mechanism is characterized in that a supporting seat (4) is fixedly mounted at the top end of the mechanical frame (1), a central column (5) is fixedly mounted at the top end of the supporting seat (4), a pressing rod (6) is movably mounted on the front side of the central column (5), a hydraulic column (7) is movably mounted in the supporting seat (4), a rotating plate (8) is fixedly mounted at the top end of the hydraulic column (7), a cushion seat (9) is fixedly mounted at the bottom end of the rotating plate (8), the clamping mechanism (2) is fixedly mounted at the top end of the supporting seat (4), and the locking mechanism (3) is fixedly mounted on the front side of the central column (5);
the clamping mechanism (2) comprises a lower pressing plate (201), a supporting column (202) is fixedly mounted at the bottom end of the lower pressing plate (201), a fixed seat (203) is fixedly mounted at the left side of the lower pressing plate (201), a sliding rod (204) is fixedly mounted at the top end of the fixed seat (203), a sleeve ring (205) is sleeved on the outer side of the sliding rod (204), an upper pressing plate (206) is fixedly mounted at the right end of the sleeve ring (205), a screw (207) is inserted into the upper pressing plate (206), and fixing pads (208) are fixedly mounted on opposite sides of the upper pressing plate (206) and the lower pressing plate (201);
the locking mechanism (3) comprises a sealing barrel (301), a rotating shaft (302) is movably mounted in the sealing barrel (301), a central shaft (303) is fixedly mounted at one end, far away from the sealing barrel (301), of the rotating shaft (302), rotary rings (304) are movably mounted on two sides of the central shaft (303), sealing plates (305) are fixedly mounted on the left side of a rotary plate (8) and the outer side of the left end of the rotating shaft (302), a connecting rope (306) is fixedly mounted at the bottom end of the rotary plate (8), a guide wheel (307) is fixedly mounted in a supporting seat (4), a reel (308) is fixedly mounted at the other end of the connecting rope (306), a movable ring (309) is sleeved outside the reel (308), an ejector rod (310) is fixedly mounted on the outer side of the movable ring (309), a movable plug (311) is movably mounted in the rotating shaft (302), and a sealing plug (312) is movably mounted in the rotating shaft (302);
the clamping mechanism is characterized in that the clamping mechanism comprises two central columns (5) which are symmetrically arranged at the centers of the left side and the right side of the supporting plate, the clamping mechanism (2) is fixedly arranged in front of the central columns (5), the rotating plate (8) is movably arranged behind the central columns (5), the sealing cylinder (301) is fixedly arranged on one opposite side of the central columns (5), and the movable ring (309) is positioned right below the central shaft (303);
the rotating ring (304) is fixedly connected with the rotating plate (8), the rotating shaft (302) is movably installed inside the rotating ring (304), the sealing plate (305) is embedded inside the sealing cylinder (301), the sealing plate (305) isolates the inside of the sealing cylinder (301) into two independent sealed air cavities, and the inside of the sealing cylinder (301) is filled with high-pressure nitrogen;
the movable plug (311) and the sealing plug (312) are composed of a partition plate, a movable block, an inserted link, a reset spring and a piston, the inserted link is inserted into the partition plate, the inserted link is fixedly installed between the movable block and the piston, the piston is located on one side, away from the movable block, of the partition plate, the reset spring in the movable plug (311) is fixedly installed between the movable block and the partition plate, and the reset spring in the sealing plug (312) is fixedly installed between the partition plate and the piston;
the central shaft (303) and the rotating shaft (302) are both internally provided with sealed air passages, the rotating shaft (302) is internally provided with a vent hole, the sealed air passages are connected with the vent hole, the movable plug (311) is movably arranged at the outlet of the sealed air passage in the central shaft (303), the sealing plug (312) is movably arranged at the joint of the sealed air passage and the vent hole, and the piston is attached to the inner wall of the sealed air passage;
threaded grooves are formed in the upper pressing plate (206) and the lower pressing plate (201), the screws (207) are inserted into the two threaded grooves, the sliding rod (204) is L-shaped, and a baffle is fixedly mounted at the left end of the sliding rod (204).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110082382.7A CN112916675B (en) | 2021-01-21 | 2021-01-21 | Bending angle adjusting mechanism for hydraulic plate bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110082382.7A CN112916675B (en) | 2021-01-21 | 2021-01-21 | Bending angle adjusting mechanism for hydraulic plate bending machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112916675A CN112916675A (en) | 2021-06-08 |
| CN112916675B true CN112916675B (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110082382.7A Active CN112916675B (en) | 2021-01-21 | 2021-01-21 | Bending angle adjusting mechanism for hydraulic plate bending machine |
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| CN (1) | CN112916675B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19901796A1 (en) * | 1999-01-19 | 2000-07-27 | Reinhardt Gmbh Maschbau | Bending machine for flat materials has machine frame open on one short side for material insertion and simplified bending tool carrier |
| CN208527773U (en) * | 2018-05-31 | 2019-02-22 | 佛山市南海区南仙机械有限公司 | A kind of bending machine convenient for adjusting bending angle |
| CN109304387A (en) * | 2018-10-30 | 2019-02-05 | 安徽捷运矿山机械有限公司 | A kind of bending machine die of the bent multiple angles of mining |
| CN211191509U (en) * | 2019-09-28 | 2020-08-07 | 林萍萍 | Production-use plate bending machine convenient for adjusting bending angle |
| CN211539305U (en) * | 2019-12-26 | 2020-09-22 | 金华华港运动器材有限公司 | Bending machine convenient to adjust bending angle |
| CN212144073U (en) * | 2020-04-14 | 2020-12-15 | 重庆市超强钢结构制造有限公司 | Bending machine with bending angle limiting function |
-
2021
- 2021-01-21 CN CN202110082382.7A patent/CN112916675B/en active Active
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| CN112916675A (en) | 2021-06-08 |
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Effective date of registration: 20230323 Address after: 266300 Hou Han Ge Zhuang Cun, Jiaolai Sub District Office, Jiaozhou City, Qingdao City, Shandong Province Applicant after: Qingdao Yuhang Steel Structure Co.,Ltd. Address before: 315000 198 Jinhe Road, Jiaochuan street, Zhenhai District, Ningbo City, Zhejiang Province Applicant before: Li Jiayi |
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