A special fixture for laser cladding and remanufacturing of hydraulic support column in fully mechanized mining

Abstract

The utility model relates to a kind of special fixture of fully mechanized hydraulic support stand column laser cladding remanufacturing, including first clamping assembly and second clamping assembly, first clamping assembly includes base, fixed clamping assembly and mobile clamping assembly, base is fixedly arranged, fixed clamping assembly is arranged at one end of base, fixed clamping assembly is used to the fixed end clamping of hydraulic support stand column, mobile clamping assembly is arranged at the other end of base, mobile clamping assembly is used to the movable end clamping of hydraulic support stand column;Second clamping assembly includes guide block and isolation plate, guide block is movably arranged between fixed clamping assembly and mobile clamping assembly, isolation plate is mirror image configuration with two, all slidingly penetrate in guide block, and clamping groove is formed in isolation plate. Two clamping grooves pass through guide block can be tightly combined with the outer wall of the sliding column edge portion of hydraulic support stand column, block the metal powder after melting and flow to the sealing layer of sliding column and fixed column, guarantee the sealing property of hydraulic support stand column.

Description

Technical Field

[0001] This utility model belongs to the field of laser cladding technology, and specifically relates to a special fixture for laser cladding remanufacturing of fully mechanized hydraulic support columns. Background Technology

[0002] Hydraulic supports for fully mechanized mining are the core support equipment for modern underground fully mechanized mining faces. Their columns, as the main pressure-bearing and actuating elements, endure extreme working conditions such as high pressure, eccentric load, strong corrosion, and severe friction for extended periods. The chrome plating on the surface of the columns (mainly the piston and the outer surface of the secondary cylinder) is highly susceptible to failure modes such as wear, scratches, and corrosion pits, leading to sealing failure and loss of support capability.

[0003] Laser cladding technology, as an advanced remanufacturing method, has become the preferred process for remanufacturing hydraulic support columns due to its characteristics such as metallurgical bonding between the cladding layer and the substrate, dense coating, excellent performance, and controllable heat input. This process restores the column's dimensions and improves its surface properties by cladding a layer of corrosion-resistant alloy, such as copper-based or nickel-based alloy, onto the failed surface of the column. Finally, after finishing and replating, its performance reaches or even exceeds that of a new product.

[0004] However, during the laser cladding remanufacturing process, the molten metal powder can easily flow into the sealing layer between the moving end and the fixed end, which can corrode the sealing layer. Moreover, excessive melting at the junction of the moving end and the fixed end can form a continuous body, which can easily cause the hydraulic telescopic function to fail.

[0005] Therefore, there is an urgent need for a special fixture for laser cladding remanufacturing of fully mechanized hydraulic support columns to solve the above problems. Utility Model Content

[0006] To achieve the above objectives, this utility model provides the following technical solution: a special fixture for laser cladding remanufacturing of a fully mechanized hydraulic support column, comprising a first clamping assembly and a second clamping assembly. The first clamping assembly includes a base, a fixed clamping assembly, and a movable clamping assembly. The base is fixedly disposed, and the fixed clamping assembly is disposed at one end of the base for clamping the fixed end of the hydraulic support column. The movable clamping assembly is disposed at the other end of the base for clamping the movable end of the hydraulic support column. The second clamping assembly includes a guide block and an isolation plate. The guide block is movably disposed between the fixed clamping assembly and the movable clamping assembly. Two isolation plates are mirror-arranged, both slidingly penetrating the guide block. The isolation plates are provided with engagement grooves, which are semi-circular, and the inner walls of the two engagement grooves are in contact with the sliding peripheral wall of the hydraulic support column.

[0007] As a further improvement of this utility model, the guide block is configured as U-shaped, rectangular slots are symmetrically opened in the inner side walls of the guide block, a threaded groove is provided in the center of the rectangular slot, a wedge-shaped hole is opened in the isolation plate, a wedge-shaped block is rotatably arranged in the wedge hole, a threaded column is fixed on the T-shaped column, and the threaded column is threadedly assembled in the threaded groove.

[0008] As a further improvement of this utility model, a guide groove is provided on the base, and two supports are fixed on the base at both ends of the guide groove. A threaded rod is rotatably arranged in the two supports. A motor is fixed on the base, and the threaded rod is fixed to the output end of the motor. An L-shaped rod is slidably arranged in the guide groove. The L-shaped rod is fixed to the guide block, and a threaded sleeve is fixed in the L-shaped rod. The threaded sleeve is threadedly assembled to the threaded rod.

[0009] As a further improvement of this utility model, the fixing and clamping assembly includes a mounting plate and a second motor. The mounting plate is fixed to one side of the upper end of the base, and the second motor is fixed to the mounting plate, with the output shaft of the second motor rotating through the mounting plate.

[0010] As a further improvement of this utility model, the movable clamping assembly includes a movable plate, a sliding groove is provided on the base, the bottom of the movable plate is slidably disposed in the sliding groove, two brackets are fixed on the base at both ends of the sliding groove, threaded rods are rotatably disposed in the two brackets, a motor is fixed on the base, the threaded rods are fixed to the output end of the motor, a screw sleeve is fixed in the movable plate, and the threaded rods are threadedly assembled to the screw sleeves.

[0011] As a further improvement of this utility model, both the fixed clamping assembly and the movable clamping assembly include clamping components, specifically turntables. One turntable is rotatably mounted on the mounting plate and fixed to the output end of motor two. The other turntable is rotatably mounted on the movable plate. A connecting plate is provided on the same side of the two turntables. At least two connecting ears are circumferentially fixed between the connecting plate and the turntable. A screw is rotatably mounted in the two connecting ears. The two ends of the screw have opposite thread directions. Motor four is fixed on one of the connecting ears. The screw is fixed to the output end of motor four. At least two guide grooves are circumferentially formed on the connecting plate. Two guide rods are slidably mounted in the two guide grooves. Two screw cylinders are fixed in the two guide rods. The screw cylinders are threadedly assembled to the screws, and the two screw cylinders have opposite thread directions. A clamping block is fixed on the guide rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By using the second clamping component, before laser cladding is applied to the sliding column of the hydraulic support column, the guide block is moved to the diameter change position of the hydraulic support column. Two isolation plates are then inserted through the guide block in sequence, so that the two locking grooves are tightly fitted with the outer wall of the edge of the sliding column of the hydraulic support column. This prevents the molten metal powder from flowing into the sealing layer between the sliding column and the fixed column, ensuring the sealing performance of the hydraulic support column. At the same time, it can isolate some of the laser energy. In other words, the two isolation plates can act as an isolation zone to prevent the edge of the sliding column of the hydraulic support column from excessively melting and forming a continuous body with the fixed column, thus preventing hydraulic failure. Attached Figure Description

[0014] Figure 1 A schematic diagram of an overall device for a special fixture for laser cladding remanufacturing of hydraulic support columns in fully mechanized mining;

[0015] Figure 2 This is a schematic diagram of the second clamping component structure in the unengaged state of the isolation plate of a special fixture for laser cladding remanufacturing of a fully mechanized hydraulic support column.

[0016] Figure 3 This is a schematic diagram of the second clamping component structure in the unengaged state of the isolation plate of a special fixture for laser cladding remanufacturing of a fully mechanized hydraulic support column.

[0017] Figure 4 A schematic diagram of the moving clamping component structure of a special fixture for laser cladding remanufacturing of fully mechanized hydraulic support columns;

[0018] Figure 5 This is a schematic diagram of the clamping structure of a special fixture for laser cladding remanufacturing of hydraulic support columns in fully mechanized mining.

[0019] The components are as follows: 1. Base; 2. Fixed clamping assembly; 3. Moving clamping assembly; 41. Guide block; 42. Isolation plate; 421. Engaging groove; 411. Rectangular groove; 412. Threaded groove; 413. Threaded post; 11. Guide groove; 43. Support; 44. Threaded rod one; 45. Motor one; 46. L-shaped rod; 21. Mounting plate; 22. Motor two; 31. Moving plate; 32. Support; 33. Threaded rod two; 34. Motor three; 51. Turntable; 52. Connecting plate; 53. Connecting ear; 531. Screw; 54. Motor four; 521. Guide groove; 55. Guide rod; 56. Clamping block. Detailed Implementation

[0020] See Figures 1 to 5As shown, a special fixture for laser cladding remanufacturing of a fully mechanized hydraulic support column includes a first clamping assembly and a second clamping assembly. The first clamping assembly includes a base 1, a fixed clamping assembly 2, and a movable clamping assembly 3. The base 1 is fixedly installed, and the fixed clamping assembly 2 is located at one end of the base 1 and is used to clamp the fixed end of the hydraulic support column. The movable clamping assembly 3 is located at the other end of the base 1 and is used to clamp the movable end of the hydraulic support column. The second clamping assembly includes a guide block 41 and an isolation plate 42. The guide block 41 is movably installed between the fixed clamping assembly 2 and the movable clamping assembly 3. There are two isolation plates 42 arranged in a mirror image, both of which slide through the guide block 41. The isolation plates 42 are provided with engagement grooves 421, which are semi-circular. The inner walls of the two engagement grooves 421 are in contact with the sliding column periphery of the hydraulic support column.

[0021] It should be noted that in this application, the piston rod and the secondary cylinder of the multi-stage hydraulic support column are collectively referred to as the sliding column.

[0022] It should be explained that the guide block 41 guides the two isolation plates 42, so that the two engaging grooves 421 are in the same plane and can always maintain a vertical and tight fit with the sliding column of the hydraulic support column.

[0023] In addition, it should be noted that the diameter of the circle formed by the two locking grooves 421 is equal to the diameter of the movable column of the hydraulic support column. In other words, the inner wall of the two locking grooves 421 can completely cover the outer wall of the sliding column of the hydraulic support column, avoiding gaps.

[0024] Specifically, before laser cladding the sliding column of the hydraulic support column, the guide block 41 is moved to the diameter change position of the hydraulic support column, and two isolation plates 42 are sequentially passed through the guide block 41 to achieve a tight fit between the two engaging grooves 421 and the outer wall of the edge of the sliding column of the hydraulic support column. Therefore, during the high-temperature laser cladding process, it can prevent the molten metal powder from flowing into the sealing layer between the sliding column and the fixed column, preventing corrosion of the sealing layer and ensuring the sealing performance of the hydraulic support column. At the same time, it can isolate part of the laser energy, that is, the two isolation plates 42 can act as an isolation zone to prevent the edge of the sliding column of the hydraulic support column from excessively melting and forming a continuous body with the fixed column, thus preventing the hydraulic telescopic function from failing.

[0025] In a preferred embodiment, the guide block 41 is configured in a U-shape, and rectangular slots 411 are symmetrically provided on both sides of the guide block 41. A threaded groove 412 is provided in the center of the rectangular slots 411. A wedge-shaped hole is provided in the isolation plate 42, and a wedge block is rotatably provided in the wedge hole. A threaded post 413 is fixed on the T-shaped post, and the threaded post 413 is threadedly assembled in the threaded groove 412.

[0026] In other words, when installing the two isolation plates 42, first pass the two isolation plates 42 through the two rectangular slots 411 respectively, then twist the two threaded posts 413. The two threaded posts 413 push the two isolation plates 42 to move towards each other until the two locking grooves 421 are completely in contact with the outer wall of the sliding column of the hydraulic support column. After the installation is completed, the position of the two isolation plates 42 is kept fixed to prevent the inner wall of the locking groove 421 from separating from the outer wall of the sliding column of the hydraulic support column under the action of gravity.

[0027] During the process of twisting the two threaded columns 413, the two rectangular slots 411 respectively limit the two isolation plates 42 to prevent the isolation plates 42 from rotating with the threaded columns 413, and ensure that the two isolation plates 42 only move in the direction perpendicular to the hydraulic support column.

[0028] In a preferred embodiment, a guide groove 11 is provided on the base 1, and two supports 43 are fixed on the base 1 at both ends of the guide groove 11. A threaded rod 44 is rotatably arranged in the two supports 43. A motor 45 is fixed on the base 1, and the threaded rod 44 is fixed to the output end of the motor 45. An L-shaped rod 46 is slidably arranged in the guide groove 11. The L-shaped rod 46 is fixed to the guide block 41, and a threaded sleeve is fixed in the L-shaped rod 46. The threaded sleeve is threadedly assembled to the threaded rod 44.

[0029] Specifically, the starter motor 45 can drive the threaded rod 44 to rotate, and the threaded rod 44 will drive the L-shaped rod 46 to move along the guide groove 11, thereby enabling the guide block 41 to move precisely to the variable diameter position of the hydraulic support column.

[0030] In a preferred embodiment, the fixing and clamping assembly 2 includes a mounting plate 21 and a second motor 22. The mounting plate 21 is fixed to one side of the upper end of the base 1, and the second motor 22 is fixed on the mounting plate 21, with the output shaft of the second motor 22 rotating through the mounting plate 21.

[0031] In a preferred embodiment, the movable clamping assembly 3 includes a movable plate 31, a sliding groove is provided on the base 1, the bottom of the movable plate 31 is slidably disposed in the sliding groove, two brackets 32 are fixed on the base 1 at both ends of the sliding groove, threaded rods 33 are rotatably disposed in the two brackets 32, a motor 34 is fixed on the base 1, the threaded rods 33 are fixed to the output end of the motor 34, a screw sleeve is fixed in the movable plate 31, and the threaded rods 33 are threadedly assembled to the screw sleeve.

[0032] In other words, when motor 34 starts, it will drive threaded rod 2 33 to rotate, and then threaded rod 2 33 will drive moving plate 31 to move along the slide groove.

[0033] In a preferred embodiment, both the fixed clamping assembly 2 and the movable clamping assembly 3 include clamping components, specifically including turntables 51. One turntable 51 is rotatably mounted on the mounting plate 21 and fixed to the output end of the second motor 22. The other turntable 51 is rotatably mounted on the movable plate 31. A connecting plate 52 is provided on the same side of the two turntables 51. At least two connecting ears 53 are circumferentially fixed between the connecting plate 52 and the turntable 51. A screw 531 rotates within the two connecting ears 53. The two ends of the screw 531 have opposite thread directions. A fourth motor 54 is fixed on one of the connecting ears 53. The screw 531 is fixed to the output end of the fourth motor 54. At least two guide grooves 521 are circumferentially formed on the connecting plate 52. Two guide rods 55 are slidably provided within the two guide grooves 521. Two screw cylinders are fixed within the two guide rods 55. The screw cylinders are threadedly assembled to the screw 531, and the two screw cylinders have opposite thread directions. A clamping block 56 is fixed on the guide rod 55.

[0034] It should be explained that when the motor 54 starts, it will drive the screw 531 to rotate. The screw 531 will drive the two guide rods 55 to move closer or further away in sync. Therefore, the two clamping blocks 56 will clamp the end of the hydraulic support column in a centered position.

[0035] Specifically, after the end clamping is completed, the starting motor 22 will drive the turntable 51 on the mounting plate 21 to rotate, which in turn drives the clamping block 56 on the fixed connecting plate 52 to rotate, thus driving the entire hydraulic support column to rotate, so as to cooperate with the laser cladding equipment to complete a stable and comprehensive cladding operation.

[0036] Specifically, when laser cladding is required on the hydraulic support column, firstly, motor 4 54 in the fixed clamping assembly 2 is started, and the fixed end of the hydraulic support column is clamped in the center by clamping block 56. Then, motor 3 34 and motor 4 54 in the moving clamping assembly 3 are started in sequence to clamp the sliding end of the hydraulic support column. Then, motor 2 22 and motor 3 34 are started at the same time to cooperate with the laser cladding equipment to clad and repair the sliding column of the hydraulic support column. Before cladding and repair, motor 1 45 is started, and the two threaded columns 413 are turned in sequence to make the two isolation plates 42 completely fit with the variable diameter outer wall of the hydraulic support column, ensuring that the isolation plates 42 can act as an isolation zone during the cladding and repair process to avoid high temperature damage.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be primarily defined by the scope of the claims.

Claims

1. A special fixture for laser cladding remanufacturing of hydraulic support columns in fully mechanized mining, characterized in that: include: The first clamping assembly includes a base (1), a fixed clamping assembly (2), and a movable clamping assembly (3). The base (1) is fixedly installed, the fixed clamping assembly (2) is installed at one end of the base (1), and the fixed clamping assembly (2) is used to clamp the fixed end of the hydraulic support column. The movable clamping assembly (3) is installed at the other end of the base (1), and the movable clamping assembly (3) is used to clamp the movable end of the hydraulic support column. The second clamping assembly includes a guide block (41) and an isolation plate (42). The guide block (41) is movably disposed between the fixed clamping assembly (2) and the movable clamping assembly (3). There are two isolation plates (42) arranged in a mirror image, both of which slide through the guide block (41). The isolation plate (42) is provided with a locking groove (421). The locking groove (421) is semi-circular, and the inner walls of the two locking grooves (421) are in contact with the sliding column periphery of the hydraulic support column.

2. The special fixture for laser cladding remanufacturing of fully mechanized hydraulic support columns according to claim 1, characterized in that: The guide block (41) is configured in a U-shape. Rectangular slots (411) are symmetrically provided on both sides of the guide block (41). A threaded groove (412) is provided in the center of the rectangular slot (411). A wedge-shaped hole is provided in the isolation plate (42). A wedge block is rotatably provided in the wedge-shaped hole. A threaded column (413) is fixed on the T-shaped column. The threaded column (413) is threadedly assembled in the threaded groove (412).

3. A special fixture for laser cladding remanufacturing of fully mechanized hydraulic support columns according to claim 2, characterized in that: The base (1) is provided with a guide groove (11). Two supports (43) are fixed on the base (1) at both ends of the guide groove (11). A threaded rod (44) is rotatably arranged in the two supports (43). A motor (45) is fixed on the base (1). The threaded rod (44) is fixed to the output end of the motor (45). An L-shaped rod (46) is slidably arranged in the guide groove (11). The L-shaped rod (46) is fixed to the guide block (41). A threaded sleeve is fixed in the L-shaped rod (46). The threaded sleeve is threadedly assembled to the threaded rod (44).

4. A special fixture for laser cladding remanufacturing of fully mechanized hydraulic support columns according to claim 1, characterized in that: The fixed clamping assembly (2) includes a mounting plate (21) and a second motor (22). The mounting plate (21) is fixed to one side of the upper end of the base (1). The second motor (22) is fixed on the mounting plate (21), and the output shaft of the second motor (22) rotates through the mounting plate (21).

5. A special fixture for laser cladding remanufacturing of fully mechanized hydraulic support columns according to claim 1, characterized in that: The movable clamping assembly (3) includes a movable plate (31), a sliding groove is provided on the base (1), the bottom of the movable plate (31) is slidably disposed in the sliding groove, two brackets (32) are fixed on the base (1) at both ends of the sliding groove, and threaded rods (33) are rotatably disposed in the two brackets (32), a motor (34) is fixed on the base (1), the threaded rods (33) are fixed to the output end of the motor (34), a screw sleeve is fixed in the movable plate (31), and the threaded rods (33) are threadedly assembled to the screw sleeve.

6. A special fixture for laser cladding remanufacturing of fully mechanized hydraulic support columns according to claim 1, characterized in that: Both the fixed clamping assembly (2) and the movable clamping assembly (3) include clamping components, specifically turntables (51). One turntable (51) is rotatably mounted on the mounting plate (21) and fixed to the output end of the second motor (22). The other turntable (51) is rotatably mounted on the movable plate (31). A connecting plate (52) is provided on the same side of the two turntables (51). At least two connecting ears (53) are circumferentially fixed between the connecting plate (52) and the turntable (51). A screw (531) rotates inside the two connecting ears (53). The screw (531) has opposite threads at both ends. A motor (54) is fixed on one of the connecting lugs (53). The screw (531) is fixed to the output end of the motor (54). At least two guide grooves (521) are opened on the connecting plate (52) around the circumference. Two guide rods (55) are slidably arranged in the two guide grooves (521). Two screw cylinders are fixed in the two guide rods (55). The screw cylinders are threadedly assembled to the screw (531), and the threads of the two screw cylinders are opposite. A clamping block (56) is fixed on the guide rod (55).

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