CN113601368A - Steel rust cleaning device that building engineering used - Google Patents
Steel rust cleaning device that building engineering used Download PDFInfo
- Publication number
- CN113601368A CN113601368A CN202110995838.9A CN202110995838A CN113601368A CN 113601368 A CN113601368 A CN 113601368A CN 202110995838 A CN202110995838 A CN 202110995838A CN 113601368 A CN113601368 A CN 113601368A
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- CN
- China
- Prior art keywords
- supporting
- clamping
- fixed
- sliding
- rust removing
- Prior art date
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
- B24B41/062—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically between centres; Dogs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a steel rust removing device for constructional engineering, which comprises a bracket, wherein a sliding table is movably arranged in the bracket through a guide rail, and a plurality of groups of supporting plates capable of being attached to circular tubes are symmetrically arranged on the sliding table; the one end of support is fixed with rotary drive device, rotary drive device's output is connected with the pivot, the end-to-end connection of pivot has supporting component, still be fixed with on the support with the endocentric solid fixed ring of supporting component, the rotatable centre gripping subassembly that is equipped with in the fixed ring, just the pipe can be placed between centre gripping subassembly and supporting component. Compared with the prior art, the supporting assembly disclosed by the invention has the advantages that the supporting tile automatically opens and is attached to the inner wall of the circular pipe to be locked when the supporting assembly rotates, the clamping sheet and the supporting tile are adsorbed by the electromagnet, so that the supporting tile and the clamping sheet respectively and correspondingly reach the outer wall and the inner wall of the circular pipe to play a clamping role, and the clamping is stable.
Description
Technical Field
The invention relates to the technical field of constructional engineering equipment, in particular to a steel rust removing device for constructional engineering.
Background
In the building engineering, a large amount of circular tube type steel is required to be used as a support of equipment, but the steel is easily rusted due to the corrosion of rainwater and the like during use and placement, and the rust removal operation needs to be carried out on the steel on time to prevent safety accidents caused by the influence of further rusting on the strength of the steel.
Among the prior art, make the pipe rotatory and polish to its periphery with centre gripping pivoted equipment such as lathe, can evenly remove rust high-efficiently, but be difficult to carry out the centre gripping to it with the chuck to the pipe that the diameter is great, often need artifically polish the rust cleaning with the polisher for the rust cleaning is inhomogeneous, and the effect is poor, makes and needs consume a large amount of operating time, thereby influences going on of follow-up work.
Therefore, it is necessary to provide a steel rust removing apparatus for construction engineering to solve the above problems in the background art.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: a steel rust removing device for constructional engineering comprises a support, wherein a sliding table is movably arranged in the support through a guide rail, and a plurality of groups of supporting plates capable of being attached to circular tubes are symmetrically arranged on the sliding table;
the one end of support is fixed with rotary drive device, rotary drive device's output is connected with the pivot, the end-to-end connection of pivot has supporting component, still be fixed with on the support with the endocentric solid fixed ring of supporting component, the rotatable centre gripping subassembly that is equipped with in the fixed ring, just the pipe can be placed between centre gripping subassembly and supporting component.
Further, preferably, a linear driving device is fixed on the side of the support, the output end of the linear driving device is connected with a gear, and the gear is meshed with a rack fixed in the sliding table.
Further, as preferred, every group of backup pads is articulated through the hinge, the hinge rotationally is connected to in the slip table, and every the backup pad passes through servo telescopic link and is connected with the slip table, servo telescopic link's both ends are articulated with slip table and backup pad respectively.
Further, as preferred, detachably is equipped with the friction disc in the one side of backup pad and pipe laminating, the one side that the backup pad was kept away from to the friction disc is the rough surface to different groups the friction disc gradually increases along the moving direction fineness of slip table.
Further, as preferred, the supporting component includes the connection pad, connection pad fixed connection is in the pivot and is close to terminal position, circumference evenly distributed has seted up the spout of multichannel along its radial extension in the connection pad, every be equipped with the slide bar in the spout slidable, the slide bar is kept away from the one end of connection pad centre of a circle and is fixed with curved support tile.
Further, as preferred, still be equipped with in the pivot and be close to the adjustment carousel of the one side laminating of spout with the connection pad, the circumference distributes in the adjustment carousel has a multichannel arc wall, and just every way arc wall passes through the sliding pin and is connected with every slide bar one-to-one, the one end of sliding pin is fixed on the slide bar, and the other end runs through the arc wall and is connected rather than slidable.
Preferably, the adjusting turntable is in threaded connection with the rotating shaft, and the rotation direction of the threads of the adjusting turntable drives the adjusting turntable to rotate in the direction of opening the supporting tile when the rotation driving device drives the rotating shaft to rotate forward.
Furthermore, as preferred, the centre gripping subassembly includes the change, the change is annular cavity, and its outer wall passes through the bearing and is connected with solid fixed ring rotationally, the circumference of change inner wall one side distributes and has a plurality of movably embedding the inside guide vane of change, the direction that the guide vane is close to the change centre of a circle is fixed with curved clamping piece, the direction of guide vane inside the change is fixed with spacing piece, guide vane, clamping piece constitute the slidable structure that the cross section is "worker" word.
Preferably, a spring is arranged between the rotating ring and the limiting piece, and the clamping piece slides towards the direction far away from the circle center of the rotating ring under the natural state of the spring.
Furthermore, preferably, the clamping sheets correspond to the supporting tiles in distribution position and shape one by one, and electromagnets are arranged in each clamping sheet and each supporting tile;
the electro-magnet of corresponding clamping piece and support tile is opposite polarity in the one side of laminating, makes it can adsorb each other, and the electro-magnet in two adjacent clamping pieces/support tile is opposite polarity to when making clamping piece and support the skew corresponding laminating position of tile, produce the repulsion force with adjacent clamping piece/support tile, in order to further increase the stability of clamping piece and support tile laminating.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the inclination angle of the supporting plate can be changed by driving the servo telescopic rod to stretch, so that the supporting plate can be attached to the outer walls of circular tubes with different diameters, friction plates with different roughness can achieve the effect of polishing and derusting in steps, the polishing efficiency is ensured, and the smooth surface of the polished circular tube can be ensured
According to the invention, the position of the sliding pin in the arc-shaped groove is changed by rotating the adjusting turntable, so that the sliding pin can push the sliding rod to slide, the opening and closing degree of the supporting tile is changed, and the supporting tile can be attached to the inner wall of the circular tube to provide a supporting effect; and when the rotating shaft drives the supporting component to rotate, the supporting tile automatically opens and is attached to the inner wall of the circular tube to be in a locking state.
In the invention, the electromagnets in the clamping sheets and the supporting tiles are electrified to respectively and correspondingly reach the outer wall and the inner wall of the circular tube to play a clamping role, and the electromagnets in the two adjacent clamping sheets/supporting tiles are in opposite polarities, so that when the clamping sheets and the supporting tiles deviate from corresponding joint positions, repulsive force is generated between the clamping sheets and the supporting tiles and the adjacent clamping sheets/supporting tiles, and the joint stability of the clamping sheets and the supporting tiles is further improved.
Drawings
FIG. 1 is a schematic structural view of a steel rust removing apparatus for construction engineering;
FIG. 2 is a schematic structural view of a sliding table and a supporting plate of a steel rust removing device for construction engineering;
FIG. 3 is a schematic structural view of a support assembly of a steel rust removing apparatus for construction engineering;
FIG. 4 is a schematic structural view of a clamping assembly of a steel rust removing device for construction engineering;
in the figure: 1. a support; 2. a sliding table; 3. a guide rail; 4. a linear drive device; 41. a rack; 5. a support plate; 51. a servo telescopic rod; 52. a friction plate; 53. a hinge; 6. a fixing ring; 7. a clamping assembly; 8. a support assembly; 9. a rotating shaft; 10. a rotation driving device; 71. rotating the ring; 72. a limiting sheet; 73. a guide piece; 74. a clamping piece; 75. a spring; 81. a connecting disc; 82. a chute; 83. a slide bar; 84. supporting the tile; 85. adjusting the turntable; 86. an arc-shaped slot; 87. and a sliding pin.
Detailed Description
Referring to fig. 1, in the embodiment of the present invention, a steel rust removing device for building engineering includes a support 1, a sliding table 2 is movably disposed in the support 1 through a guide rail 3, and a plurality of groups of support plates 5 capable of being attached to circular tubes are symmetrically disposed on the sliding table 2;
a rotary driving device 10 is fixed at one end of the support 1, the output end of the rotary driving device 10 is connected with a rotating shaft 9, the tail end of the rotating shaft 9 is connected with a supporting component 8, a fixing ring 6 which is concentric with the supporting component 8 is also fixed on the support 1, a clamping component 7 is rotatably arranged in the fixing ring 6, and a circular tube can be placed between the clamping component 7 and the supporting component 8;
the clamping assembly 7 and the supporting assembly 8 clamp the round pipe and are driven to rotate by the rotation driving device 10, so that the round pipe can be rotationally rubbed with the supporting plate 5.
Referring to fig. 2, in the present embodiment, a linear driving device 4 is fixed on a side of the bracket 1, and an output end of the linear driving device 4 is connected with a gear, and the gear is engaged with a rack 41 fixed in the sliding table 2, so that the linear driving device 4 can drive the sliding table 2 to move.
In the embodiment, each group of support plates 5 are hinged through a hinge 53, the hinge 53 is rotatably connected to the sliding table 2, each support plate 5 is connected with the sliding table 2 through a servo telescopic rod 51, and two ends of the servo telescopic rod 51 are respectively hinged with the sliding table 2 and the support plates 5;
that is, the inclination angle of the supporting plate 5 can be changed by driving the telescopic rod 51 to extend and retract, so that the supporting plate can be attached to the outer walls of circular pipes with different diameters.
In this embodiment, detachably is equipped with friction disc 52 in the one side of backup pad 5 and pipe laminating, the one side that backup pad 5 was kept away from to friction disc 52 is the mat surface to different groups friction disc 52 gradually increases along the moving direction fineness of slip table 2 to reach the effect that the step was polished and is derusted, both ensured the efficiency of polishing, had the smoothness that can guarantee to polish the back pipe surface.
In this embodiment, the supporting component 8 includes the connection pad 81, connection pad 81 fixed connection is in pivot 9 and is close to terminal position, circumference evenly distributed has seted up multichannel along its radial extension's spout 82 in the connection pad 81, every be equipped with slide bar 83 in the spout 82 slidable, the one end that the slide bar 83 kept away from the connection pad 81 centre of a circle is fixed with curved support tile 84.
In this embodiment, an adjusting turntable 85 attached to one surface of the connecting disc 81 close to the sliding groove 82 is further disposed in the rotating shaft 9, a plurality of arc-shaped grooves 86 are circumferentially distributed in the adjusting turntable 85, each arc-shaped groove 86 is connected to each sliding rod 83 through a sliding pin 87 in a one-to-one correspondence manner, one end of each sliding pin 87 is fixed on each sliding rod 83, and the other end of each sliding pin 87 penetrates through the arc-shaped groove 86 and is slidably connected to the corresponding sliding rod 83;
that is, by rotating the adjusting dial 85 to change the position of the sliding pin 87 in the arc-shaped slot 86, the sliding pin 87 can push the sliding rod 83 to slide, so as to change the opening and closing degree of the supporting tile 84, so that the supporting tile 84 can be attached to the inner wall of the circular tube to provide a supporting function.
In this embodiment, the adjusting turntable 85 is in threaded connection with the rotating shaft 9, and the rotation direction of the threads enables the rotation driving device 10 to drive the rotating shaft 9 to rotate forward, so as to drive the adjusting turntable 85 to rotate in the direction of opening the supporting tile 84, so that the supporting tile 84 automatically opens and adheres to the inner wall of the circular tube to a locking state when the rotating shaft 9 drives the supporting component 8 to rotate.
In this embodiment, the clamping assembly 7 includes a rotating ring 71, the rotating ring 71 is an annular cavity, the outer wall of the rotating ring 71 is rotatably connected with the fixing ring 6 through a bearing, a plurality of guide pieces 73 movably embedded in the rotating ring 71 are distributed on the circumference of one side of the inner wall of the rotating ring 71, an arc-shaped clamping piece 74 is fixed in the direction of the guide piece 73 close to the center of the circle of the rotating ring 71, a limiting piece 72 is fixed in the direction of the guide piece 73 in the rotating ring 71, and the limiting piece 72, the guide piece 73 and the clamping piece 74 form a slidable structure with an "i" shaped cross section.
In this embodiment, a spring 75 is disposed between the inside of the rotating ring 71 and the limiting plate 72, and the spring 75 naturally slides the clamping plate 74 in a direction away from the center of the rotating ring 71, so as to ensure that circular tubes with different diameters can pass through the rotating ring.
In this embodiment, the distribution positions and shapes of the clamping pieces 74 and the supporting tiles 84 are in one-to-one correspondence, and electromagnets are arranged in each of the clamping pieces 74 and the supporting tiles 84;
the electromagnets of the corresponding clamping piece 74 and the supporting tile 84 have opposite polarities on the surfaces to be attached, so that the electromagnets can be mutually adsorbed, and the electromagnets of the two adjacent clamping pieces 74/supporting tiles 84 have opposite polarities, so that when the clamping piece 74 and the supporting tile 84 deviate from the corresponding attaching positions, a repulsive force is generated with the adjacent clamping piece 74/supporting tile 84, so as to further increase the attaching stability of the clamping piece 74 and the supporting tile 84.
During specific implementation, in an initial state, the adjusting turntable 85 is rotated to adjust the supporting tile 84 to a closed state, the circular tube is placed on the supporting plate 5, the servo telescopic rod 51 is driven to stretch and retract to change the inclination angle of the supporting plate 5, so that the circular tube can be attached to the outer wall of the circular tube, and the center of the circular tube is aligned to the center of the rotating shaft 9;
placing the pipe wall of the circular pipe between the clamping component 7 and the supporting component 8, and rotating the adjusting turntable 85 to adjust the supporting tile 84 to be opened to the position attached to the inner wall of the circular pipe;
the electromagnets in the clamping piece 74 and the supporting tile 84 are electrified, so that the electromagnets respectively and correspondingly reach the outer wall and the inner wall of the circular tube to play a clamping role;
the rotating shaft 9 drives the supporting component 8 to rotate through the rotary driving device 10, the supporting tile 84 automatically opens and is attached to the inner wall of the circular tube to be in a locking state, the supporting component 8 drives the circular tube and the clamping component 7 to rotate after clamping is stable, the circular tube and the friction plate 52 rotate relatively to rub to remove rust, and the linear driving device 4 drives the sliding table 2 to change the polishing and rust removing positions.
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 considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (10)
1. A steel rust removing device for constructional engineering comprises a support (1) and is characterized in that a sliding table (2) is movably arranged in the support (1) through a guide rail (3), and a plurality of groups of supporting plates (5) which can be attached to round pipes are symmetrically arranged on the sliding table (2);
the one end of support (1) is fixed with rotation driving device (10), the output of rotation driving device (10) is connected with pivot (9), the end-to-end connection of pivot (9) has supporting component (8), still be fixed with on support (1) with supporting component (8) endocentric solid fixed ring (6), rotatable centre gripping subassembly (7) that is equipped with in solid fixed ring (6), just the pipe can be placed between centre gripping subassembly (7) and supporting component (8).
2. The steel rust removing device for the constructional engineering as claimed in claim 1, characterized in that a linear driving device (4) is fixed on the side of the bracket (1), and the output end of the linear driving device (4) is connected with a gear which is meshed with a rack (41) fixed in the sliding table (2).
3. The steel rust removing device for the constructional engineering as claimed in claim 1, characterized in that each group of supporting plates (5) is hinged through a hinge (53), the hinge (53) is rotatably connected into the sliding table (2), each supporting plate (5) is connected with the sliding table (2) through a servo telescopic rod (51), and two ends of the servo telescopic rod (51) are respectively hinged with the sliding table (2) and the supporting plates (5).
4. A steel rust removing device for constructional engineering as claimed in claim 3, characterized in that friction plates (52) are detachably arranged in the face of the support plate (5) attached to the circular tube, the face of the friction plates (52) far away from the support plate (5) is rough, and the fineness of the friction plates (52) of different groups in the moving direction of the sliding table (2) is gradually increased.
5. The steel rust removing device for the constructional engineering as claimed in claim 1, wherein the support assembly (8) comprises a connecting disc (81), the connecting disc (81) is fixedly connected to the position, close to the tail end, of the rotating shaft (9), a plurality of sliding grooves (82) extending along the radial direction of the connecting disc (81) are formed in the connecting disc (81) in a circumferentially and uniformly distributed manner, each sliding rod (83) is slidably arranged in each sliding groove (82), and an arc-shaped support tile (84) is fixed to one end, away from the center of the connecting disc (81), of each sliding rod (83).
6. The steel rust removing device for the constructional engineering as claimed in claim 5, wherein an adjusting turntable (85) attached to one surface, close to the sliding groove (82), of the connecting disc (81) is further arranged in the rotating shaft (9), a plurality of arc-shaped grooves (86) are circumferentially distributed in the adjusting turntable (85), each arc-shaped groove (86) is connected with each sliding rod (83) through a sliding pin (87) in a one-to-one correspondence manner, one end of each sliding pin (87) is fixed on each sliding rod (83), and the other end of each sliding pin penetrates through the arc-shaped groove (86) to be slidably connected with the sliding pin.
7. The steel rust removing device for the constructional engineering as claimed in claim 6, characterized in that the adjusting turntable (85) is in threaded connection with the rotating shaft (9), and the rotation direction of the threads drives the adjusting turntable (85) to rotate in the direction of opening the supporting tiles (84) when the rotary driving device (10) drives the rotating shaft (9) to rotate forward.
8. The steel rust removing device for the constructional engineering as claimed in claim 1, wherein the clamping assembly (7) comprises a rotary ring (71), the rotary ring (71) is an annular cavity, the outer wall of the rotary ring (71) is rotatably connected with the fixed ring (6) through a bearing, a plurality of guide pieces (73) movably embedded into the rotary ring (71) are distributed on the circumference of one side of the inner wall of the rotary ring (71), an arc-shaped clamping piece (74) is fixed on the guide piece (73) in the direction close to the center of the circle of the rotary ring (71), a limiting piece (72) is fixed on the guide piece (73) in the direction inside the rotary ring (71), and the limiting piece (72), the guide piece (73) and the clamping piece (74) form a slidable structure with an I-shaped cross section.
9. The steel rust removing device for the constructional engineering as claimed in claim 8, wherein a spring (75) is arranged between the inside of the rotating ring (71) and the limiting piece (72), and the spring (75) enables the clamping piece (74) to slide in a direction away from the center of the rotating ring (71) in a natural state.
10. The steel rust removing device for the constructional engineering as claimed in claim 8, wherein the clamping pieces (74) correspond to the supporting tiles (84) in distribution position and shape one by one, and electromagnets are arranged in each of the clamping pieces (74) and the supporting tiles (84);
the electromagnets of the corresponding clamping sheets (74) and the corresponding supporting tiles (84) have opposite polarities on the surfaces to be attached, so that the electromagnets can be mutually adsorbed, and the electromagnets in the two adjacent clamping sheets (74)/supporting tiles (84) have opposite polarities, so that when the clamping sheets (74) and the supporting tiles (84) deviate from the corresponding attaching positions, repulsive force is generated between the electromagnets and the adjacent clamping sheets (74)/supporting tiles (84), so that the attaching stability of the clamping sheets (74) and the supporting tiles (84) is further improved.
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| CN202110995838.9A CN113601368B (en) | 2021-08-27 | 2021-08-27 | Steel rust cleaning device that building engineering used |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110995838.9A CN113601368B (en) | 2021-08-27 | 2021-08-27 | Steel rust cleaning device that building engineering used |
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| CN113601368A true CN113601368A (en) | 2021-11-05 |
| CN113601368B CN113601368B (en) | 2022-11-11 |
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| CN114831324A (en) * | 2022-05-17 | 2022-08-02 | 温州理工学院 | Automatic thresher of pomegranate |
| CN117161676A (en) * | 2023-11-03 | 2023-12-05 | 山西省水利建筑工程局集团有限公司 | Water conservancy pipeline construction is with direction interfacing apparatus |
| CN117506577A (en) * | 2023-11-14 | 2024-02-06 | 江苏政田重工股份有限公司 | Cylindrical grinding equipment for thin-wall cylindrical parts |
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