CN113664124A - Cutting machine for steel strand of railway box girder anchor recess - Google Patents
Cutting machine for steel strand of railway box girder anchor recess Download PDFInfo
- Publication number
- CN113664124A CN113664124A CN202110963398.9A CN202110963398A CN113664124A CN 113664124 A CN113664124 A CN 113664124A CN 202110963398 A CN202110963398 A CN 202110963398A CN 113664124 A CN113664124 A CN 113664124A
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- plate
- moving mechanism
- cutting
- steel strand
- cylinder
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D19/00—Shearing machines or shearing devices cutting by rotary discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/02—Arrangements for holding, guiding, and/or feeding work during the operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/28—Electric drives
Abstract
The invention relates to a cutting machine for steel strands of an anchor recess of a railway box girder, and belongs to the technical field of devices for cutting. The cutting machine comprises a plate frame mechanism, an up-down moving mechanism, a left-right moving mechanism, a front-back moving mechanism and a cutting mechanism; the cutting mechanism comprises a cutting motor and a cutting blade, and the cutting blade is arranged at the output end of the cutting motor; the cutting mechanism is fixedly connected with the front-back moving mechanism, a front-back moving pair is formed between the front-back moving mechanism and the left-right moving mechanism, and a left-right moving pair and an up-down moving pair are respectively formed between the left-right moving mechanism and the up-down moving mechanism; the plate frame mechanism can be connected with a mechanical arm. The cutting machine can accurately and effectively cut the steel strand in the anchor recess, and greatly reduces the labor intensity for cutting the steel strand in the anchor recess hole.
Description
Technical Field
The invention relates to a machine for cutting steel strands in an anchor recess on the end face of a railway prefabricated box girder, and belongs to the technical field of devices for cutting.
Background
The proportion of bridges constructed by railways in China is large, and most of the bridges are standard-span simply-supported bridges. These bridges are constructed by manufacturing a large number of prefabricated railway box girders. In the manufacturing of the railway precast box girder, after concrete pouring and demoulding, the procedures of tensioning, grouting, steel strand cutting, anchor hole roughening, plugging and the like need to be carried out, wherein the anchor steel strand cutting needs mechanical cutting. In the current anchor recess hole steel strand cutting process, a manual handheld cutting machine is mostly adopted for cutting, and the defects of low working efficiency, high labor intensity, high safety risk and the like are overcome. And the common mechanical cutting device is difficult to adapt to the running displacement of a small space in the anchor recess hole, so that the steel strand in the anchor recess hole cannot be accurately and efficiently cut.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the steel strand in the anchor recess hole is cut accurately and efficiently, and the labor intensity is reduced.
The technical scheme provided by the invention for solving the technical problems is as follows: a cutting machine for steel strand wires of an anchor recess of a railway box girder comprises a plate frame mechanism, an up-down moving mechanism, a left-right moving mechanism, a front-back moving mechanism and a cutting mechanism; the cutting mechanism comprises a cutting motor and a cutting blade, and the cutting blade is arranged at the output end of the cutting motor; the cutting mechanism is fixedly connected with the front-back moving mechanism, a front-back moving pair is formed between the front-back moving mechanism and the left-right moving mechanism, and a left-right moving pair and an up-down moving pair are respectively formed between the left-right moving mechanism and the up-down moving mechanism; the plate frame mechanism can be connected with a mechanical arm.
The plate frame mechanism comprises a flange plate, a back plate, a rib plate, a baffle plate and a positioning clamping plate, wherein the flange plate is attached to and fixedly connected with the back plate, the baffle plate is parallel to and opposite to the back plate, the rib plate is positioned between the baffle plate and the back plate and is respectively vertically connected with the baffle plate and the back plate, the rib plate and the baffle plate form a frame cover structure covering the outside of the up-down moving mechanism, the positioning clamping plate is arranged on the outer side surface of the baffle plate, the baffle plate is provided with an opening capable of enabling the cutting blade to move front and back, left and right and up and down, and the flange plate can be connected with an mechanical arm;
the up-down moving mechanism comprises a lifting motor, a lifting motor fixing plate, a belt, a synchronous belt pulley, a vertical screw rod, a lifting sliding block which is sleeved on the screw rod and can slide, and limiting seats which are respectively arranged at the upper end and the lower end of the screw rod, the synchronous belt pulley is fixed at the upper end of the screw rod, the lifting motor is fixed on the back plate through the lifting motor fixing plate, a screw tooth sleeve which is in threaded connection with the screw rod is arranged in the lifting sliding block, and bearings which are sleeved at the upper end and the lower end of the screw rod are arranged in the limiting seats;
the left and right moving mechanism comprises a left and right air cylinder, a left and right air cylinder limiting block, a left and right air cylinder L-shaped connecting plate, a left and right guide rod sleeve ring, a left and right guide rod, a bedplate and a vertical plate, wherein the bedplate and the vertical plate are vertically connected with each other;
the front-back moving mechanism comprises a front-back cylinder, a front-back cylinder limiting block 1, a front-back cylinder L-shaped connecting plate, a front-back guide pillar sleeve ring, a front-back guide pillar limiting block and a supporting plate; the front and rear air inlet cylinders are fixed on the supporting plate through front and rear cylinder L-shaped connecting plates, and the front and rear cylinder limiting blocks are fixed on the supporting plate; the upper parts of the front and rear guide post lantern rings and the bedplate are fixed and the front and rear guide posts are sleeved with sliding rings; and the two ends of the front and rear guide posts are inserted into the front and rear guide post limiting blocks and fixed.
The invention has the beneficial effects that: 1) due to the designed up-down moving mechanism, left-right moving mechanism and front-back moving mechanism, the cutting mechanism and the cutting blade thereof can adjust the position and distance with the anchor recess and the position and distance with the steel strand after entering the anchor recess in the three-dimensional space, thereby accurately and effectively cutting the steel strand in the anchor recess; 2) and because the plate frame mechanism can be connected with a mechanical arm, such as a robot arm or other mechanical arms, the mechanical operation can be realized, thereby greatly reducing the labor intensity of cutting the steel strand in the anchor hole.
Furthermore, synchronous belt wheel has two, elevator motor's output band pulley is article word with two synchronous belt wheels and arranges, the belt is around form the clothes hanger form on elevator motor's output band pulley and two synchronous belt wheels.
Furthermore, the two front and rear guide pillars are respectively positioned on two sides of the front and rear air cylinders and are symmetrically arranged; four front and rear cylinder limiting blocks are respectively fixed on four corners of the supporting plate.
Further, the rib plates are in the shape of two parallel and opposite C-shaped plates.
Furthermore, the left and right air cylinders and the front and rear air cylinders are externally connected with air sources.
Drawings
The invention further discloses a cutting machine for the steel strand of the railway box girder anchor recess in combination with the attached drawings.
FIG. 1 is a schematic perspective view of a cutter for steel strand wires of an anchor recess of a railway box girder in the embodiment.
Fig. 2 is a schematic view of the structure in the opposite direction to fig. 1.
Fig. 3 is the fig. 2 with the panel frame mechanism removed.
Fig. 4 is a schematic view of the structure in the opposite direction to fig. 3.
FIG. 5 is a structural relationship diagram of the steel strand cutting machine for the box girder anchor recess and the box girder anchor recess hole in the embodiment.
Detailed Description
Examples
The cutting machine for the steel strand of the railway box girder anchor recess of the embodiment comprises a plate frame mechanism, an up-down moving mechanism, a left-right moving mechanism, a front-back moving mechanism and a cutting mechanism as shown in fig. 1 and 2. The plate frame mechanism comprises a flange plate 1, a back plate 2, a ribbed plate 3, a baffle 4 and a positioning clamping plate 5. Flange plate 1 pastes to with backplate 2 and pastes fixed hookup, and baffle 4 is parallel relative with backplate 2, and floor 3 is located between baffle 4 and backplate 2 and couples perpendicularly with baffle 4 and backplate 2 respectively, and floor 3 is parallel relative two C shape boards form, and backplate 2, floor 3 and baffle 4 form the frame cover structure, and location cardboard 5 establishes at the lateral surface of baffle 4, and flange plate 1 can be used to the hookup arm.
As shown in fig. 1, 3 and 4, after the plate frame mechanism is removed from the cutting machine for steel strand at the anchor recess of the railway box girder in the embodiment, the up-down moving mechanism includes a lifting motor 8, a lifting motor fixing plate 8-1, a belt 9, two synchronous pulleys 9-1, two parallel vertical lead screws 10, a lifting slider 10-1 (the lifting slider 10-1 can slide on the lead screw 10 to form an up-down moving pair) which is sleeved on the lead screw 10 and can slide, and four limiting seats 10-2 which are respectively arranged at the upper end and the lower end of the lead screw 10. An output end belt wheel of the lifting motor 8 and two synchronous belt wheels 9-1 are arranged in a delta shape, and a belt 9 is wound on the output end belt wheel of the lifting motor 8 and the two synchronous belt wheels 9-1 to form a clothes hanger shape; two synchronous belt wheels 9-1 are respectively fixed on the upper surfaces of limiting seats 10-2 at the upper ends of two screw rods 10, and a lifting motor 8 is fixed on a back plate 2 by bolts through a lifting motor fixing plate 8-1; a screw thread sleeve connected with the screw rod 10 in a threaded manner is arranged in the lifting slide block 10-1, a bearing is arranged in the limiting seat 10-2, and the upper end and the lower end of the screw rod 10 are sleeved in the bearing. When the lifting motor 8 is started to rotate forwards and backwards, the belt wheel at the output end of the lifting motor 8 drives the belt 9, the belt 9 drives the two synchronous belt wheels 9-1 to rotate, the belt wheel 9-1 drives the screw rod 10 to rotate, and the screw thread sleeve on the sliding block 10-1 rotates in a matched mode with the screw rod 10 to move up and down along the screw rod 10.
As shown in fig. 1, 3 and 4, the left-right moving mechanism comprises a left cylinder 12, a right cylinder stopper 12-1, a left cylinder L-shaped connecting plate 12-2, a left guide rod lantern ring 13, a left guide rod 13-1, a right guide rod 13-1, a bedplate 11 and a vertical plate 11-1; the bedplate 11 and the vertical plate 11-1 are vertically connected with each other, a left cylinder 12 and a right cylinder 12 are connected and fixed on one side surface of the vertical plate 11-1 through a left cylinder L-shaped connecting plate 12-2 by bolts, a left cylinder limiting block 12-1 and a right cylinder limiting block 12-1 are connected and fixed on a lifting slide block 10-1 by bolts, two ends of a left guide rod 13-1 and a right guide rod 13-1 are inserted into the lifting slide block 10-1 of the up-down moving mechanism and fixed, a left guide rod lantern ring 13 and a right guide rod lantern ring 13 are fixed on the other side surface of the vertical plate 11-1 and sleeved on the left guide rod 13-1 by a sliding ring (the left guide rod lantern ring 13 and the right guide rod 13-1 form a left-right moving pair). When the left and right cylinders 12 are started to extend, piston rods of the left and right cylinders 12 extend left and right under the constraint of the left and right cylinder limit blocks 12-1, and the left and right cylinders 12 drive the bedplate 11, the vertical plate 11-1 and the left and right guide rod lantern rings 13 to move left and right along the left and right guide rods 13-1. The left and right cylinders 12 are externally connected with an air source.
As shown in fig. 1, 3 and 4, the front-back moving mechanism comprises a front-back cylinder 6, a front-back cylinder limiting block 6-1, a front-back cylinder L-shaped connecting plate 6-2, a front-back guide pillar 7, a front-back guide pillar sleeve ring 7-1, a front-back guide pillar limiting block 7-2 and a supporting plate 7-3; the front and rear air inlet cylinders 6 are fixed on the supporting plate 7-3 through the L-shaped connecting plate 6-2 of the front and rear air cylinders by bolts, and four front and rear air cylinder limiting blocks 6-1 are respectively fixed on four corners of the supporting plate 7-3; the upper parts of the front and rear guide post lantern rings 7-1 and a platen 11 of the left-right moving mechanism are welded and fixed, and meanwhile, a sliding ring is sleeved on the front and rear guide posts 7 (the front and rear guide post lantern rings 7-1 and the front and rear guide posts 7 form a front-back moving pair); the two front and rear guide posts 7 are respectively positioned at the two sides of the front and rear air cylinders 6 and are symmetrically arranged, and the two ends of each front and rear guide post 7 are inserted into and fixed with the front and rear guide post limiting blocks 7-2. When the front and rear cylinders 6 are started to extend, piston rods of the front and rear cylinders 6 extend back and forth under the restraint of the front and rear cylinder limiting blocks 6-1, and the front and rear cylinders 12 are provided with the supporting plates 7-3, the front and rear guide pillar limiting blocks 7-2 and the front and rear guide pillars 7 to form front and rear movement in the front and rear guide pillar sleeve rings 7-1. The front and rear cylinders 6 are externally connected with an air source.
As shown in fig. 1, 2, 3 and 4, the cutting mechanism includes a cutting motor 14, a cutting motor slot 14-1, a cutting blade 15; the cutting blade 15 is annular and is arranged at the output end of the cutting motor 14, the cutting motor is clamped in the cutting motor clamping groove 14-1, and the cutting motor clamping groove 14-1 is fixedly connected to the bottom of the supporting plate 7-3 through bolts.
When the cutting machine is used, when the lifting slide block 10-1 moves up and down, the left and right guide rods 13-1 fixedly connected with the lifting slide block 10-1 drive the whole left and right moving mechanism, the whole front and back moving mechanism and the whole cutting mechanism to synchronously lift up and down. The left and right cylinders 12 can make the whole left and right moving mechanism, the whole front and back moving mechanism and the whole cutting mechanism move left and right synchronously when stretching. When the front and rear cylinders 6 are telescopic, the whole front and rear moving mechanism and the whole cutting mechanism can synchronously move back and forth.
As shown in fig. 5, the cutting mechanism and the cutting blade 15 thereof can be adjusted in the three-dimensional space to the position and distance of the anchor recess and the position and distance of the steel strand after entering the anchor recess by the up-down moving mechanism, the left-right moving mechanism and the front-back moving mechanism, firstly, the positioning clamping plate 5 is extended into the anchor recess and matched with the edge of the anchor recess, then the position distance between the cutting blade 15 and the steel strand 16 in the anchor recess is proper, finally, the cutting motor 14 is started to operate, and the cutting blade 15 can accurately and effectively cut the steel strand 16 in the anchor recess. The portion of FIG. 5 that is included in the hatching indicates the anchor recess.
The cutting mechanism is fixedly connected with the front-back moving mechanism, the front-back moving mechanism forms a front-back moving pair between the front-back guide post lantern ring 7-1 and the front-back guide post 7 and the left-right moving mechanism, the left-right moving mechanism forms a left-right moving pair between the left-right guide rod lantern ring 13 and the left-right guide rod 13-1 and the up-down moving mechanism, and the left-right moving mechanism forms an up-down moving pair between the up-down moving mechanism and the up-down moving mechanism through the lifting slide block 10-1 and the lead screw 10.
The above description is only a preferred embodiment of the present invention, but the present invention is not limited to this, and the lower moving mechanism, the left moving mechanism, and the front and rear moving mechanism in the above embodiments may be configured as other structures besides the structure of the above embodiments, for example: 1) the transmission of the belt 9 and the belt wheel 9-1 can also be replaced by gears and chains; 2) the lifting motor 8 can also be replaced by a lifting cylinder, the screw rod 10 is replaced by a polish rod, and the lifting slide block 10-1 is provided with a screw thread sleeve; 3) the left and right air cylinders and the front and rear air cylinders can be replaced by a left and right motor and a front and rear motor; and so on. All equivalents and modifications of the inventive concept and its technical solutions are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a railway case roof beam anchor cave cutting machine for steel strand wires which characterized in that: comprises a plate frame mechanism, an up-down moving mechanism, a left-right moving mechanism, a front-back moving mechanism and a cutting mechanism; the cutting mechanism comprises a cutting motor and a cutting blade, and the cutting blade is arranged at the output end of the cutting motor; the cutting mechanism is fixedly connected with the front-back moving mechanism, a front-back moving pair is formed between the front-back moving mechanism and the left-right moving mechanism, and a left-right moving pair and an up-down moving pair are respectively formed between the left-right moving mechanism and the up-down moving mechanism; the plate frame mechanism can be connected with a mechanical arm.
2. The cutter for steel strands of anchor recesses of railway box girders according to claim 1, wherein: the plate frame mechanism comprises a flange plate, a back plate, a rib plate, a baffle plate and a positioning clamping plate, wherein the flange plate is attached to and fixedly connected with the back plate, the baffle plate is parallel to and opposite to the back plate, the rib plate is positioned between the baffle plate and the back plate and is respectively vertically connected with the baffle plate and the back plate, the rib plate and the baffle plate form a frame cover structure covering the outside of the up-down moving mechanism, the positioning clamping plate is arranged on the outer side surface of the baffle plate, the baffle plate is provided with an opening capable of enabling the cutting blade to move front and back, left and right and up and down, and the flange plate can be connected with an mechanical arm;
the up-down moving mechanism comprises a lifting motor, a lifting motor fixing plate, a belt, a synchronous belt pulley, a vertical screw rod, a lifting sliding block which is sleeved on the screw rod and can slide, and limiting seats which are respectively arranged at the upper end and the lower end of the screw rod, the synchronous belt pulley is fixed at the upper end of the screw rod, the lifting motor is fixed on the back plate through the lifting motor fixing plate, a screw tooth sleeve which is in threaded connection with the screw rod is arranged in the lifting sliding block, and bearings which are sleeved at the upper end and the lower end of the screw rod are arranged in the limiting seats;
the left and right moving mechanism comprises a left and right air cylinder, a left and right air cylinder limiting block, a left and right air cylinder L-shaped connecting plate, a left and right guide rod sleeve ring, a left and right guide rod, a bedplate and a vertical plate, wherein the bedplate and the vertical plate are vertically connected with each other;
the front-back moving mechanism comprises a front-back cylinder, a front-back cylinder limiting block 1, a front-back cylinder L-shaped connecting plate, a front-back guide pillar sleeve ring, a front-back guide pillar limiting block and a supporting plate; the front and rear air inlet cylinders are fixed on the supporting plate through front and rear cylinder L-shaped connecting plates, and the front and rear cylinder limiting blocks are fixed on the supporting plate; the upper parts of the front and rear guide post lantern rings and the bedplate are fixed and the front and rear guide posts are sleeved with sliding rings; and the two ends of the front and rear guide posts are inserted into the front and rear guide post limiting blocks and fixed.
3. The cutter for the steel strand of the anchor recess of the railway box girder as claimed in claim 2, wherein: the synchronous belt wheels are two, the output end belt wheel of the lifting motor and the two synchronous belt wheels are arranged in a delta shape, and the belt is wound on the output end belt wheel of the lifting motor and the two synchronous belt wheels to form a clothes hanger shape.
4. The cutter for the steel strand of the anchor recess of the railway box girder as claimed in claim 2, wherein: the two front and rear guide posts are respectively positioned on two sides of the front and rear air cylinders and are symmetrically arranged; four front and rear cylinder limiting blocks are respectively fixed on four corners of the supporting plate.
5. The cutter for the steel strand of the anchor recess of the railway box girder as claimed in claim 2, wherein: the ribbed plate is in the shape of two parallel opposite C-shaped plates.
6. The cutter for steel strand of anchor recess of railway box girder according to any one of claims 2 to 5, wherein: the left and right air cylinders and the front and rear air cylinders are externally connected with air sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110963398.9A CN113664124B (en) | 2021-08-20 | 2021-08-20 | Cutting machine for Liang Maoxue steel strands of railway box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110963398.9A CN113664124B (en) | 2021-08-20 | 2021-08-20 | Cutting machine for Liang Maoxue steel strands of railway box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113664124A true CN113664124A (en) | 2021-11-19 |
| CN113664124B CN113664124B (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110963398.9A Active CN113664124B (en) | 2021-08-20 | 2021-08-20 | Cutting machine for Liang Maoxue steel strands of railway box |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554967A (en) * | 2010-12-23 | 2012-07-11 | 中国核动力研究设计院 | Water jet cutting actuating device |
| JP2013111691A (en) * | 2011-11-28 | 2013-06-10 | Fanuc Ltd | Wire electric discharge machining method, and wire electric discharge machine for machining tool that uses ultra-hard material and is mounted to rotating shaft |
| KR20130005886U (en) * | 2012-03-30 | 2013-10-10 | 김준호 | Chain Machine Cutting Tool |
| CN106738096A (en) * | 2016-11-18 | 2017-05-31 | 林红英 | A kind of sheet cutting machine |
| CN209853285U (en) * | 2019-03-05 | 2019-12-27 | 广东博智林机器人有限公司 | Aluminum template carrying robot |
| CN211306453U (en) * | 2019-12-23 | 2020-08-21 | 张丽虹 | Automatic cutting system |
| CN213195441U (en) * | 2020-09-28 | 2021-05-14 | 张伟胜 | Construction is with steel bar cutting device of being convenient for scarfing cinder |
-
2021
- 2021-08-20 CN CN202110963398.9A patent/CN113664124B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554967A (en) * | 2010-12-23 | 2012-07-11 | 中国核动力研究设计院 | Water jet cutting actuating device |
| JP2013111691A (en) * | 2011-11-28 | 2013-06-10 | Fanuc Ltd | Wire electric discharge machining method, and wire electric discharge machine for machining tool that uses ultra-hard material and is mounted to rotating shaft |
| KR20130005886U (en) * | 2012-03-30 | 2013-10-10 | 김준호 | Chain Machine Cutting Tool |
| CN106738096A (en) * | 2016-11-18 | 2017-05-31 | 林红英 | A kind of sheet cutting machine |
| CN209853285U (en) * | 2019-03-05 | 2019-12-27 | 广东博智林机器人有限公司 | Aluminum template carrying robot |
| CN211306453U (en) * | 2019-12-23 | 2020-08-21 | 张丽虹 | Automatic cutting system |
| CN213195441U (en) * | 2020-09-28 | 2021-05-14 | 张伟胜 | Construction is with steel bar cutting device of being convenient for scarfing cinder |
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| Publication number | Publication date |
|---|---|
| CN113664124B (en) | 2023-05-23 |
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