A piston rod laser cladding repair device

Abstract

The application provides a piston rod laser cladding repair device and relates to the field of laser cladding, which comprises a back plate, first and second support frames are respectively installed on both ends of the surface of the back plate, the surfaces close to the bottom of the first and second support frames are connected with a workbench, the workbench is located directly below a piston rod, a servo drive assembly is arranged on the top of the back plate, a laser cladding assembly is arranged above the piston rod, the laser cladding assembly can move above the piston rod through the servo drive assembly, a movable groove is arranged on the surface of the middle end of the back plate, an auxiliary displacement mechanism is arranged in the movable groove, and two support mechanisms are symmetrically arranged on the surface of the workbench. Through precise and stable support, efficient automatic linkage, wide adaptability and comprehensive protection design, the repair efficiency is significantly improved while the repair quality of the piston rod is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser cladding, and particularly relates to a piston rod laser cladding repair device. BACKGROUND

[0002] Laser cladding is an advanced surface engineering and remanufacturing technology, and its core principle is to form a molten pool on the surface of a base material through a high-energy laser beam, and simultaneously feed metal powder or wire into the molten pool, so as to quickly melt and solidify and form a functional coating that is metallurgically combined with the base material.

[0003] Laser cladding repair of a piston rod is a result of precise matching of the unique advantages of laser cladding technology and the working environment and damage characteristics of the piston rod, and the core purpose is to restore the performance, prolong the service life, and reduce the cost.

[0004] The existing device relies on two-end fixation for support of the piston rod, and lacks dynamic adaptive auxiliary support in the middle region, or only uses a simple lifting structure with a fixed height. Since the piston rod is usually a slender piece, in the machining of the slender piston rod, bending deformation is easily caused by self-weight, vibration, or laser thermal stress during the laser cladding process, which leads to a relative position deviation between the repaired region and the laser beam, and finally causes defects such as uneven cladding layer thickness and insufficient bonding strength. SUMMARY

[0005] In order to solve the technical problem that the existing device relies on two-end fixation for support of the piston rod, and lacks dynamic adaptive auxiliary support in the middle region, or only uses a simple lifting structure with a fixed height, and since the piston rod is usually a slender piece, in the machining of the slender piston rod, bending deformation is easily caused by self-weight, vibration, or laser thermal stress during the laser cladding process, which leads to a relative position deviation between the repaired region and the laser beam, and finally causes defects such as uneven cladding layer thickness and insufficient bonding strength, the present application provides a piston rod laser cladding repair device.

[0006] The technical scheme provided by the embodiments of the present application is as follows:

[0007] The embodiment of the present application provides a piston rod laser cladding repair device, which comprises a back plate, first and second support frames are installed at both ends of the surface of the back plate, a chuck and a center pin are arranged on the surfaces close to the top of the first and second support frames, the chuck and the center pin can fix the piston rod, a workbench is connected to the surfaces close to the bottom of the first and second support frames, the workbench is located directly below the piston rod, a servo drive assembly is arranged at the top of the back plate, a laser cladding assembly is arranged above the piston rod, the laser cladding assembly can move above the piston rod through the servo drive assembly, a movable groove is formed in the middle surface of the back plate, an auxiliary displacement mechanism is arranged in the movable groove, and two support mechanisms are symmetrically arranged on the surface of the workbench, the auxiliary displacement mechanism and the two support mechanisms can cooperate to support the piston rod.

[0008] The auxiliary displacement mechanism comprises a sliding plate, the sliding plate is slidingly installed at the top of the movable groove, a square column is arranged at the top of the sliding plate, and a fixing plate is connected between the laser cladding assembly and the square column.

[0009] The square column is connected with a stabilizing mechanism close to the end surface of the piston rod, the stabilizing mechanism comprises a rectangular plate, a rectangular groove is formed in the middle of the rectangular plate, clamping plates are arranged at the upper end and the lower end in the rectangular groove, a stepping motor is arranged in the square column, a first gear is connected to the output end of the stepping motor, the first gear is located in the middle of the rectangular groove, first racks are engaged with the two sides of the first gear, the two first racks are connected with the two clamping plates respectively, a recess is formed in the surface of the clamping plate close to the piston rod, and a clamping surface is installed in the recess through bolts.

[0010] A rectangular sliding block is fixedly installed below the sliding plate, an arc-shaped plate is arranged on the surface of the rectangular sliding block, the support mechanism comprises a movable column, a Y-shaped support rod is arranged above the movable column, the top end of the Y-shaped support rod is close to the bottom surface of the piston rod, the surface of the movable column penetrates through the workbench, a sliding rod is movably arranged in the workbench, a connecting rod is connected between the middle end of the sliding rod and the bottom end of the movable column through a rotating shaft, an L-shaped pushing column is fixedly installed at one end of the sliding rod close to the back plate, the end of the L-shaped pushing column penetrates through the workbench, a semicircular head is arranged at the end of the L-shaped pushing column, the semicircular head corresponds to the arc-shaped plate, a convex plate is fixedly arranged in the workbench and close to one end of the L-shaped pushing column, and a spring is connected between the convex plate and the L-shaped pushing column.

[0011] The bottom of the Y-shaped supporting rod is provided with an inserting column, the top of the movable column is provided with an inserting slot, the surface of the inserting slot is provided with a through groove, the inserting column is movably inserted into the inserting slot, and the surface of the inserting column is threadedly connected with a bolt, and the surface of the bolt penetrates through the through groove.

[0012] The surface of the workbench is provided with a through hole, the other end of the sliding rod penetrates through the workbench through the through hole, the surface of the top of the workbench and away from the back plate is provided with a boss, two shielding assemblies are arranged below the boss, the two shielding assemblies correspond to the two supporting mechanisms respectively, the shielding assembly comprises a blocking plate, the blocking plate is slidably arranged on the surface of the workbench, two side ears are fixedly installed at the two ends of the top of the blocking plate, a positioning block is fixedly installed at the bottom end of the workbench and directly below the side ears, a guide column is fixedly connected between the positioning block and the boss, the side ears are slidably sleeved on the surface of the guide column, a tension spring is arranged on the surface of the guide column and between the side ears and the boss, when the blocking plate is driven by the tension spring to move to the topmost position, the blocking plate has a shielding effect on the through hole, the surface of the blocking plate is provided with a path groove, the two ends of the path groove are provided with inclined grooves, and the middle end is provided with a horizontal groove, the bottom of the rectangular sliding block is fixedly installed with an L-shaped rod, the end of the L-shaped rod is provided with a convex column, and the surface of the convex column is slidably arranged in the path groove.

[0013] The top of the blocking plate is provided with a second rack, the second rack is movably inserted into the boss, a second gear is rotatably installed in the boss, the second rack is engaged with the second gear, the other end of the second gear is engaged with a third rack, and the top of the third rack movably penetrates the boss.

[0014] The third rack can be completely retracted into the inside of the boss.

[0015] The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

[0016] The clamping plate of the stabilizing mechanism realizes accurate clamping of the piston rod through the stepping motor and the gear and rack transmission, cooperates with the linkage of the auxiliary displacement mechanism and the laser cladding assembly, ensures that the clamping point is always aligned below the cladding area, reduces the deformation of the piston rod due to vibration or self-weight, the Y-shaped supporting rod and the stabilizing mechanism cooperatively support to form a multi-dimensional stable structure of bottom lifting and radial clamping, avoids workpiece deviation during laser cladding, and ensures uniform and close cladding layer thickness;

[0017] The laser cladding itself has small heat input, and in combination with the stable fixation of the equipment on the workpiece, the thermal deformation and performance damage of the base metal can be reduced, the bonding strength between the repair layer and the base is high, and the service life of the piston rod is significantly prolonged;

[0018] The auxiliary displacement mechanism moves synchronously with the laser cladding assembly. The support mechanism achieves automatic avoidance through the linkage of the arc plate and the L-shaped push column. The shielding assembly automatically opens and closes the through hole through the cooperation of the convex column and the path groove. The third rack extends and retracts synchronously with the sealing plate to shield the side, forming a closed-loop automated process of cladding, support, avoidance and protection, reducing manual adjustment steps and improving repair efficiency.

[0019] The automatic obstacle avoidance design of the support mechanism and the opening and closing logic of the shielding components structurally eliminate the motion interference between the clamping plate and the Y-shaped support rod, and between the sliding rod and the through hole, reducing the risk of equipment wear and ensuring smooth operation.

[0020] The sealing plate initially limits the lateral movement of the sliding rod, indirectly reducing the vibration of the Y-shaped support rod; the reset function of the spring and tension spring ensures that the actions of each mechanism are accurately reset, avoiding loosening or deviation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the piston rod laser cladding repair equipment provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the piston rod laser cladding repair device from another perspective, provided in an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the auxiliary displacement mechanism provided in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the auxiliary displacement mechanism structure from another perspective provided in an embodiment of the present invention;

[0026] Figure 5 This is a side sectional view of the piston rod laser cladding repair device provided in an embodiment of the present invention;

[0027] Figure 6 Provided for embodiments of the present invention Figure 4 Enlarged view of point A in the middle;

[0028] Figure 7 Provided for embodiments of the present invention Figure 2 Enlarged view of point B in the middle;

[0029] Figure 8 Provided for embodiments of the present inventionFigure 5 Enlarged view at C.

[0030] Fig. 1 is a first support frame; Fig. 2 is a second support frame; Fig. 3 is a workbench; Fig. 4 is a back plate; Fig. 5 is a laser cladding assembly; Fig. 6 is an auxiliary displacement mechanism; Fig. 7 is a support mechanism; Fig. 8 is a sliding plate; Fig. 9 is a rectangular sliding block; Fig. 10 is an arc-shaped plate; Fig. 11 is a rectangular plate; Fig. 12 is a rectangular groove; Fig. 13 is a first gear; Fig. 14 is a clamping plate; Fig. 15 is a first rack; Fig. 16 is a clamping surface; Fig. 17 is an L-shaped rod; Fig. 18 is a Y-shaped support rod; Fig. 19 is a movable column; Fig. 20 is a sliding rod; Fig. 21 is an L-shaped push column; Fig. 22 is a connecting rod; Fig. 23 is a spring; Fig. 24 is a boss; Fig. 25 is a plugging plate; Fig. 26 is a path groove; Fig. 27 is a side ear; Fig. 28 is a positioning block; Fig. 29 is a guide column; Fig. 30 is a tension spring; Fig. 31 is a second rack; Fig. 32 is a second gear; Fig. 33 is a third rack; Fig. 34 is a convex column.

[0031] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application to the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs. DETAILED DESCRIPTION

[0032] The technical solutions in the present application will be described below with reference to the drawings. It should be noted that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0033] As Figures 1 to 8 shown, the embodiments of the present application provide a piston rod laser cladding repair device, which comprises a back plate 4, both ends of the surface of the back plate 4 are respectively provided with a first support frame 1 and a second support frame 2, the surfaces close to the top ends of the first support frame 1 and the second support frame 2 are respectively provided with a chuck and a center pin, the chuck and the center pin can fix the piston rod, the surfaces close to the bottom of the first support frame 1 and the second support frame 2 are connected with a workbench 3, the workbench 3 is located directly below the piston rod, the top of the back plate 4 is provided with a servo drive assembly, the upper side of the piston rod is provided with a laser cladding assembly 5, the laser cladding assembly 5 can move above the piston rod through the servo drive assembly, the middle surface of the back plate 4 is provided with a movable groove, the inside of the movable groove is provided with an auxiliary displacement mechanism 6, the surface of the workbench 3 is symmetrically provided with two support mechanisms 7, the auxiliary displacement mechanism 6 and the two support mechanisms 7 can cooperate to support the piston rod;

[0034] The device can ensure the repair quality of the piston rod, and significantly improve the repair efficiency and reduce the use cost by precise and stable support, efficient automatic linkage, wide adaptability and comprehensive protection design.

[0035] The auxiliary displacement mechanism 6 comprises a sliding plate 8 which is slidingly installed on the top of the movable slot, and a square column is arranged on the top of the sliding plate 8, a fixing plate is connected between the square column and the laser cladding assembly 5, a stabilizing mechanism is connected to the end face of the square column close to the piston rod, the stabilizing mechanism comprises a rectangular plate 11, a rectangular slot 12 is formed in the middle of the rectangular plate 11, clamping plates 14 are arranged at the upper and lower ends in the rectangular slot 12, a stepping motor is arranged in the square column, a first gear 13 is connected to the output end of the stepping motor, the first gear 13 is located in the middle of the rectangular slot 12, first racks 15 are engaged with the two sides of the first gear 13, and the two first racks 15 are connected to the two clamping plates 14 respectively, and a clamping surface 16 is installed in the recess close to the surface of the piston rod through bolts;

[0036] The sliding plate 8 can slide horizontally along the movable slot in the middle end of the back plate 4, the position of the sliding plate 8 is adjusted to drive the square column at the top to move synchronously, the square column is connected to the laser cladding assembly 5 through the fixing plate, so that the position of the auxiliary displacement mechanism 6 is linked with the movement of the laser cladding assembly 5, when the servo drive assembly drives the laser cladding assembly 5 to move above the piston rod, the position of the laser cladding assembly 5 is adjusted synchronously, so that the stabilizing mechanism can always provide precise support for the piston rod below the laser cladding area;

[0037] When the stepping motor in the square column is started, the output end drives the first gear 13 to rotate, since the first gear 13 is engaged with the first racks 15 on the two sides, the rotary motion of the gear is converted into the linear motion of the two first racks 15, and the two first racks 15 are connected to the upper and lower clamping plates 14 in the rectangular slot 12 respectively, so that the linear motion of the racks drives the clamping plates 14 to move reversely in the rectangular slot 12 synchronously, when the piston rod needs to be clamped, the two clamping plates 14 move close to each other until the surface of the piston rod is contacted and a moderate pressure is applied, when the piston rod needs to be released or the position needs to be adjusted, the two clamping plates 14 move away from each other reversely, and at this time, a certain space can be reserved between the clamping surface 16 and the piston rod;

[0038] The surface of the clamping plate 14 close to the piston rod is provided with the clamping surface 16 through the recess and the bolts, and the surface of the clamping surface 16 is provided with an arc structure matched with the curvature of the piston rod, so as to ensure the stability of clamping, and the clamping surface 16 can be installed and dismounted quickly and conveniently through the installation of the bolts.

[0039] The lower part of the sliding plate 8 is fixedly provided with a rectangular sliding block 9, the surface of the rectangular sliding block 9 is provided with an arc-shaped plate 10, the supporting mechanism 7 comprises a movable column 19, the upper part of the movable column 19 is provided with a Y-shaped supporting rod 18, the top end of the Y-shaped supporting rod 18 is close to the bottom surface of the piston rod, the surface of the movable column 19 is movably penetrated through the workbench 3, the inside of the workbench 3 is movably provided with a sliding rod 20, the middle end of the sliding rod 20 and the bottom end of the movable column 19 are connected through a connecting rod 22, one end of the sliding rod 20 close to the back plate 4 is fixedly provided with an L-shaped pushing column 21, the end of the L-shaped pushing column 21 is penetrated through the workbench 3, the end of the L-shaped pushing column 21 is provided with a semicircle head, the semicircle head corresponds to the arc-shaped plate 10, the inside of the workbench 3 and one end close to the L-shaped pushing column 21 are fixedly provided with a convex plate, the convex plate and the L-shaped pushing column 21 are connected through a spring 23;

[0040] When the sliding plate 8 slides along the movable groove, the rectangular sliding block 9 under the sliding plate 8 moves synchronously, and drives the horizontal movement of the arc-shaped plate 10 on the surface, the arc surface of the arc-shaped plate 10 corresponds to the semicircle head at the end of the L-shaped pushing column 21 of the supporting mechanism 7, with the movement of the arc-shaped plate 10, the arc surface will extrude the semicircle head, forcing the L-shaped pushing column 21 to move in the horizontal direction into the workbench 3, the L-shaped pushing column 21 is fixedly connected with the sliding rod 20, so that the movement of the L-shaped pushing column 21 will drive the sliding rod 20 to move synchronously in the workbench 3, the middle end of the sliding rod 20 is connected with the bottom end of the movable column 19 through the connecting rod 22, when the sliding rod 20 moves horizontally, the connecting rod 22 will drive the movable column 19 to rise and fall along the penetration hole of the workbench 3;

[0041] When the arc-shaped plate 10 contacts the semicircle head, the L-shaped pushing column 21 will drive the sliding rod 20 to move away from the back plate 4, at this time, under the action of the connecting rod 22, the connecting rod 22 will drive the movable column 19 to move downward along the penetration hole of the workbench 3, so that the Y-shaped supporting rod 18 will also descend synchronously, and a certain space will be reserved between the top end of the Y-shaped supporting rod 18 and the bottom surface of the piston rod, at this time, the two clamping plates 14 in the stabilizing mechanism can smoothly pass through the space during the movement of the sliding plate 8, avoiding mechanical interference with the Y-shaped supporting rod 18, when the sliding plate 8 drives the arc-shaped plate 10 to continue to move, the arc surface is out of contact with the semicircle head, the spring 23 in the workbench 3 will release the elastic force to pull the L-shaped pushing column 21 back to its original position, and then drive the movable column 19 to rise through the sliding rod 20 and the connecting rod 22, so that the Y-shaped supporting rod 18 reapproaches the bottom surface of the piston rod, restoring the supporting function.

[0042] The bottom of the Y-shaped supporting rod 18 is provided with a plug-in column, the top of the movable column 19 is provided with a plug-in slot, the surface of the plug-in slot is provided with a penetration slot, the plug-in column is movably plugged into the plug-in slot, and the surface of the plug-in column is connected with a bolt through screw threads, and the surface of the bolt penetrates the penetration slot;

[0043] The insertion column at the bottom of the Y-shaped support rod 18 is inserted into the insertion slot at the top of the movable column 19 to form a preliminary assembly relationship, ensuring the axial alignment of the Y-shaped support rod 18 and the movable column 19. When it is necessary to adjust the support height of the Y-shaped support rod 18 according to the diameter of the piston rod, the bolts on the surface of the insertion column are loosened (the bolts are originally connected with the insertion column through threads, and pass through the through grooves on the surface of the insertion slot of the movable column 19). At this time, the insertion column can slide up and down along the insertion slot, driving the Y-shaped support rod 18 to rise and fall synchronously, until the top end of the Y-shaped support rod 18 is attached to the bottom surface of the piston rod at a suitable height. After adjustment, the bolts are tightened, the heads of the bolts are abutted against the surface of the movable column 19, the movement of the insertion column in the insertion slot is limited through friction and the fastening force of the bolts, so as to fix the height of the Y-shaped support rod 18 and ensure the stability during support.

[0044] The surface of the workbench 3 is provided with a through hole, the other end of the sliding rod 20 penetrates the workbench 3 through the through hole, the top of the workbench 3 away from the back plate 4 is provided with a boss 24, and two shielding assemblies are arranged below the boss 24, the two shielding assemblies correspond to the two support mechanisms 7 respectively. The shielding assembly comprises a blocking plate 25, the blocking plate 25 is slidingly arranged on the surface of the workbench 3, two ends at the top of the blocking plate 25 are fixedly installed with side ears 27, a positioning block 28 is fixedly installed at the bottom of the workbench 3 and directly below the side ears 27, a guide column 29 is fixedly connected between the positioning block 28 and the boss 24, the side ears 27 are slidingly sleeved on the surface of the guide column 29, a tension spring 30 is arranged on the surface of the guide column 29 and between the side ears 27 and the boss 24, when the blocking plate 25 is driven by the tension spring 30 to move to the topmost position, the blocking plate 25 has a shielding effect on the through hole, the surface of the blocking plate 25 is provided with a path groove 26, both ends of the path groove 26 are provided as inclined grooves, and the middle end is provided as a horizontal groove. The bottom of the rectangular sliding block 9 is fixedly installed with an L-shaped rod 17, the end of the L-shaped rod 17 is provided with a convex column 34, and the surface of the convex column 34 is slidingly arranged in the path groove 26;

[0045] Under the tension of the tension spring 30, the blocking plate 25 is pulled towards the boss 24, and the side ear 27 slides along the guide column 29 to a position close to the boss 24. At this time, the blocking plate 25 is at the highest position, just covering the through hole on the surface of the workbench 3, preventing external debris from entering the inside of the workbench 3. When the sliding plate 8 moves the rectangular slide 9, the L-shaped rod 17 at the bottom of the rectangular slide 9 moves synchronously, and the protruding column 34 at the end thereof slides along the path groove 26 of the blocking plate 25. Since the path groove 26 has inclined grooves at both ends, when the protruding column 34 contacts the inclined section, a lateral thrust is generated on the inner wall of the path groove 26, forcing the blocking plate 25 to slide away from the boss 24 along the guide column 29 (the side ear 27 moves downward synchronously). As the protruding column 34 continues to slide, the blocking plate 25 gradually descends, and the through hole gradually exposes, allowing the sliding rod 20 to move freely through the through hole. When the protruding column 34 slides to the horizontal section of the path groove 26, the blocking plate 25 stops moving, and the through hole remains completely open, ensuring that the movement of the sliding rod 20 is not obstructed. When the sliding plate 8 moves in the opposite direction, after the protruding column 34 slides out of the inclined section of the path groove 26, the tension of the tension spring 30 is restored, driving the blocking plate 25 to reset along the guide column 29 (the side ear 27 moves upward), until it re-blocks the through hole and returns to the initial state.

[0046] In the initial state, when the blocking plate 25 blocks the through hole, the inner wall thereof is close to the surface of the sliding rod 20, forming a lateral limit for the sliding rod 20 and limiting its slight movement due to the vibration of the piston rod. Since the sliding rod 20 is connected to the movable column 19 through the connecting rod 22, and the top end of the movable column 19 is a Y-shaped support rod 18, the stability of the sliding rod 20 is transmitted to the movable column 19 through the connecting rod 22, indirectly reducing the shaking of the Y-shaped support rod 18 due to vibration, ensuring the stability of its support for the piston rod.

[0047] The top of the blocking plate 25 is provided with a second rack 31, which is movably inserted into the boss 24. A second gear 32 is rotatably installed inside the boss 24, and the second rack 31 is engaged with the second gear 32. The other end of the second gear 32 is engaged with a third rack 33, and the top of the third rack 33 movably penetrates the boss 24. The third rack 33 can be completely retracted into the interior of the boss 24, and is provided in the form of a long plate.

[0048] When the sliding plate 8 drives the rectangular slider 9 to move, the blocking plate 25 will move up and down along the guide column 29 due to the sliding of the convex column 34 in the path groove 26 (expose the through hole when descending, block the through hole when ascending), since the second rack 31 is fixed on the top of the blocking plate 25, the up and down movement of the blocking plate 25 will synchronously drive the second rack 31 to slide up and down along the internal guide structure of the boss 24, the second rack 31 is engaged with the second gear 32 in the boss 24, therefore the linear motion (up and down movement) of the second rack 31 will drive the second gear 32 to rotate around its own rotating shaft, the second gear 32 is simultaneously engaged with the third rack 33, the rotation of the second gear 32 will be converted into the linear motion of the third rack 33, and the motion direction is opposite to that of the second rack 31, when the blocking plate 25 descends, the second gear 32 rotates clockwise, driving the third rack 33 to move upward and extend from the top of the boss 24, when the blocking plate 25 rises to reset under the action of the tension spring 30, the second gear 32 rotates counterclockwise, driving the third rack 33 to move downward and completely shrink into the boss 24;

[0049] After the third rack 33 extends, since it is designed as a long plate, it can shield the side surface of the workbench 3, so that the dust generated during laser cladding can be conveniently collected.

[0050] The piston rod laser cladding repair equipment designed in the application not only retains the existing movement state of piston rod positioning and laser cladding repair, but also improves the support for the piston rod, and in combination with the stable fixation of the equipment on the workpiece, the thermal deformation and performance damage of the base metal can be reduced, the bonding strength between the repair layer and the base body is high, and the service life of the piston rod is significantly prolonged.

[0051] The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

[0052] In the present application, first, the piston rod to be repaired is placed between the first support frame 1 and the second support frame 2, and the two ends of the piston rod are clamped and fixed by the chuck of the first support frame 1 and the needle of the second support frame 2, to ensure that the axis of the piston rod is horizontal and stable, then according to the diameter of the piston rod, the height of the Y-shaped support rod 18 in the two support mechanisms 7 is adjusted, and then the stepping motor in the square column outputs to drive the first gear 13 to rotate, the first gear 13 is engaged with the first rack 15 on both sides, the rotary motion is converted into the reverse linear motion of the two first racks 15, and the first rack 15 drives the two clamping plates 14 in the rectangular groove 12 to move towards each other until the clamping surface 16 contacts the surface of the piston rod and applies moderate pressure to accurately support the piston rod below the laser cladding area, then the servo drive assembly is started to drive the laser cladding assembly 5 to move above the piston rod and align the area to be repaired, and at the same time, the sliding plate 8 can be adjusted synchronously with the position of the laser cladding assembly 5 to ensure that the stable mechanism always provides accurate support for the piston rod below the laser cladding area,

[0053] Then, when the sliding plate 8 moves with the rectangular slide 9 and the arc plate 10, the arc surface of the arc plate 10 contacts the semicircular head of the L-shaped push column 21 in the support mechanism 7, extrudes the semicircular head to force the L-shaped push column 21 to move into the workbench 3, the L-shaped push column 21 drives the sliding rod 20 to slide synchronously, the sliding rod 20 pulls the movable column 19 down through the connecting rod 22 along the through hole of the workbench 3, the Y-shaped support rod 18 is lowered accordingly, leaving space between the piston rod bottom surface and the Y-shaped support rod 18 to avoid mechanical interference between the clamping plate 14 of the stable mechanism and the Y-shaped support rod 18 when the clamping plate 14 moves, when the sliding plate 8 continues to move, the arc plate 10 is out of contact with the semicircular head, the spring 23 inside the workbench 3 releases the elastic force to pull the L-shaped push column 21 back to its original position, the L-shaped push column 21 drives the sliding rod 20 to slide in the opposite direction, the connecting rod 22 pushes the movable column 19 up, and the Y-shaped support rod 18 is close to the piston rod bottom surface again to restore the support function;

[0054] When the sliding plate 8 moves, the L-shaped rod 17 at the bottom of the rectangular slide 9 drives the protruding column 34 to slide along the path groove 26 of the blocking plate 25, in the initial state, the tension spring 30 pulls the blocking plate 25 close to the boss 24 to block the through hole of the workbench 3, and at the same time, the inner wall of the blocking plate 25 is close to the sliding rod 20 to limit the movement of the sliding rod 20 due to vibration, when the protruding column 34 slides through the inclined section of the path groove 26, the blocking plate 25 is lowered against the force of the tension spring 30, gradually exposing the through hole to allow the sliding rod 20 to move freely, when the protruding column 34 is in the horizontal section, the through hole is completely open to ensure that the sliding rod 20 moves without obstruction, when the sliding plate 8 moves in the opposite direction, the protruding column 34 is out of the inclined section, the tension spring 30 pulls the blocking plate 25 up to its original position to block the through hole again;

[0055] When the blocking plate 25 moves, the second rack 31 at the top synchronously rises and falls, drives the second gear 32 in the boss 24 to rotate, the second gear 32 drives the third rack 33 to move reversely, the third rack 33 extends and shields the side of the workbench 3, so that the dust generated by laser cladding is conveniently collected.

[0056] The present application encompasses any substitutions, modifications, equivalent methods and solutions made on the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to the person skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0057] The above is only the preferred embodiment of the present application, and it should be pointed out that for the ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be regarded as the protection scope of the present application.

Claims

1. A piston rod laser cladding repair device, characterized in that, include: Back plate (4), with a first support frame (1) and a second support frame (2) installed at both ends of the back plate (4). The first support frame (1) and the second support frame (2) are respectively provided with a chuck and a pin on the surface near the top. The chuck and the pin can fix the piston rod. The first support frame (1) and the second support frame (2) are connected to a worktable (3) near the bottom. The worktable (3) is located directly below the piston rod. The top of the back plate (4) is provided with a servo drive assembly. The top of the piston rod is provided with a laser cladding assembly (5). The laser cladding assembly (5) can move above the piston rod through the servo drive assembly. The middle surface of the back plate (4) is provided with a movable groove. The inside of the movable groove is provided with an auxiliary displacement mechanism (6). The surface of the worktable (3) is symmetrically provided with two support mechanisms (7). The auxiliary displacement mechanism (6) and the two support mechanisms (7) can cooperate to support the piston rod. The auxiliary displacement mechanism (6) includes a sliding plate (8), which is slidably mounted on the top of the movable groove. A square column is provided on the top of the sliding plate (8), and a fixing plate is connected between the laser cladding assembly (5) and the square column. The square column is connected to a stabilizing mechanism at the end face near the piston rod. The stabilizing mechanism includes a rectangular plate (11), a rectangular groove (12) is provided in the middle of the rectangular plate (11), and clamping plates (14) are provided at the upper and lower ends inside the rectangular groove (12). A stepper motor is provided inside the square column, and a first gear (13) is connected to the output end of the stepper motor. The first gear (13) is located in the middle of the rectangular groove (12). A first rack (15) is meshed on both sides of the first gear (13). The two first racks (15) are respectively connected to the two clamping plates (14). The surface of the clamping plate (14) near the piston rod is provided with a groove, and a clamping surface (16) is installed inside the groove by bolts. A rectangular slider (9) is fixedly installed below the sliding plate (8). An arc-shaped plate (10) is provided on the surface of the rectangular slider (9). The support mechanism (7) includes a movable column (19). A Y-shaped support rod (18) is provided above the movable column (19). The top of the Y-shaped support rod (18) is close to the bottom surface of the piston rod. The surface of the movable column (19) moves through the worktable (3). A sliding rod (20) is movably arranged inside the worktable (3). The middle end of the sliding rod (20) is connected to the movable column (19). A connecting rod (22) is connected between the bottom ends by a pivot. An L-shaped push column (21) is fixedly installed at one end of the sliding rod (20) near the back plate (4). The end of the L-shaped push column (21) passes through the worktable (3). A semi-circular head is provided at the end of the L-shaped push column (21). The semi-circular head corresponds to the arc plate (10). A protruding plate is fixedly provided inside the worktable (3) near one end of the L-shaped push column (21). A spring (23) is connected between the protruding plate and the L-shaped push column (21).

2. The piston rod laser cladding repair equipment according to claim 1, characterized in that, The bottom of the Y-shaped support rod (18) is provided with a plug-in post, the top of the movable post (19) is provided with a plug-in groove, the surface of the plug-in groove is provided with a through groove, the plug-in post is movably inserted into the plug-in groove, and the surface of the plug-in post is connected with a bolt by a thread, and the surface of the bolt penetrates the through groove.

3. The piston rod laser cladding repair equipment according to claim 1, characterized in that, The surface of the workbench (3) has a through hole, and the other end of the sliding rod (20) passes through the through hole through the workbench (3). A boss (24) is provided on the top surface of the workbench (3) away from the back plate (4). Two blocking components are provided below the boss (24). The two blocking components correspond to the two support mechanisms (7) respectively. The blocking components include a sealing plate (25). The sealing plate (25) is slidably disposed on the surface of the workbench (3). Side ears (27) are fixedly installed at both ends of the top of the sealing plate (25). A positioning block (28) is fixedly installed at the bottom of the workbench (3) and directly below the side ears (27). The positioning block (28) is positioned between the boss (24) and the boss. A guide post (29) is fixedly connected. The side ear (27) is slidably sleeved on the surface of the guide post (29). A tension spring (30) is provided on the surface of the guide post (29) and between the side ear (27) and the boss (24). When the tension spring (30) drives the sealing plate (25) to move to its top, the sealing plate (25) has a blocking effect on the through hole. A path groove (26) is provided on the surface of the sealing plate (25). The two ends of the path groove (26) are set as inclined grooves and the middle end is set as a horizontal groove. An L-shaped rod (17) is fixedly installed at the bottom of the rectangular slider (9). A protruding post (34) is provided at the end of the L-shaped rod (17). The surface of the protruding post (34) is slidably disposed in the path groove (26).

4. The piston rod laser cladding repair equipment according to claim 3, characterized in that, The top of the sealing plate (25) is provided with a second rack (31), which is movably inserted into the boss (24). A second gear (32) is rotatably installed inside the boss (24). The second rack (31) meshes with the second gear (32). The other end of the second gear (32) meshes with a third rack (33), and the top of the third rack (33) movably passes through the boss (24).

5. The piston rod laser cladding repair equipment according to claim 4, characterized in that, The third rack (33) can be completely retracted into the interior of the boss (24).

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