Scrator plane coping device after casting repair welding

Abstract

The utility model relates to a crator coping device, in particular to a crator plane coping device after casting repair welding, which comprises a workbench, and two four-jaw chucks used for fixing a casting are symmetrically arranged at the top of the workbench. A supporting frame and a grinding mechanism which is arranged on the supporting frame and used for grinding a casting are arranged at the top of the workbench, the grinding mechanism is matched with an adjusting mechanism arranged on the supporting frame, and a reciprocating mechanism is arranged at the top of the workbench; according to the utility model, a layered and progressive grinding mode is adopted, the material removal amount is controlled layer by layer, and the grinding depth is gradually increased, so that only a small amount of material is removed in each layer of grinding, and sudden reduction of local rigidity and stress concentration of a casting are avoided; and the polished casting forms a smooth transition area and a stable surface state.

Description

Technical Field

[0001] This utility model relates to a weld scar grinding device, specifically a weld scar surface grinding device for weld repair of castings. Background Technology

[0002] Castings are prone to defects such as porosity, sand holes, and cracks during the production process. They need to be repaired by welding to restore their performance. The weld scars formed after welding repair are usually higher than the base surface, affecting the appearance, dimensional accuracy, and subsequent processing (such as assembly and coating adhesion). Therefore, it is necessary to grind to achieve a smooth surface.

[0003] Currently, the main methods for repairing weld scars include manual tools, mechanical grinding equipment, and automated intelligent equipment. Manual tool repair is inefficient, has poor precision, high labor intensity, and high safety risks, and cannot meet the requirements of mass production and high precision. Automated intelligent equipment repair is costly, has complex programming, is difficult to maintain, and has insufficient response speed, making it difficult for small and medium-sized enterprises to adopt. It is also not economically viable for small-batch, multi-variety production. Therefore, choosing mechanical grinding equipment for weld scar repair is a high-efficiency and low-cost option.

[0004] Current mechanical grinding equipment grinds flat or regular curved surfaces by fixing the grinding wheel or belt to the machine tool spindle and feeding the workpiece through the worktable. However, mechanical grinding equipment usually adopts the traditional rough method. One-time deep grinding can cause a sudden drop in local stiffness, forming sharp edges or irregular transition zones. High-strength steel castings are prone to fatigue fracture due to stress concentration after grinding. At the same time, one-time deep grinding requires greater pressure, which shortens the life of the grinding wheel. Utility Model Content

[0005] The purpose of this utility model is to provide a grinding device for the surface of weld scars after welding repair of castings, so as to solve the problems mentioned in the background art, which are that the traditional rough grinding method, which causes a sudden drop in local stiffness, forming sharp edges or irregular transition areas, and high-strength steel castings are prone to fatigue fracture due to stress concentration after grinding, and the need to apply greater pressure for deep grinding at one time, which shortens the life of the grinding wheel.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A surface grinding device for weld scars after welding repair of castings includes a worktable, two four-jaw chucks for fixing the castings are symmetrically arranged on the top of the worktable, a support frame and a grinding mechanism for grinding the castings are arranged on the support frame, the grinding mechanism cooperates with an adjustment mechanism arranged on the support frame, and a reciprocating mechanism is arranged on the top of the worktable.

[0008] The reciprocating mechanism includes an annular guide mechanism and a drive mechanism disposed on one side of the grinding mechanism, the drive mechanism cooperating with the reciprocating mechanism.

[0009] The above-described casting weld scar surface grinding device: the grinding mechanism includes a sliding seat slidably mounted on the support frame and a limiting slider disposed on the rear side of the sliding seat, the limiting slider sliding on the support frame.

[0010] The above-mentioned casting weld scar surface grinding device: the grinding mechanism further includes a movable platform slidably installed in the sliding seat and a toothed plate fixed on the movable platform. The bottom of the movable platform is provided with a grinding motor and a grinding wheel sleeved on the output shaft of the grinding motor.

[0011] The above-mentioned casting weld scar surface grinding device: the adjustment mechanism includes a rotating shaft rotatably installed in the support frame and a drive gear sleeved on the rotating shaft, the drive gear meshing with the gear plate.

[0012] The above-described casting weld scar surface grinding device includes: the adjustment mechanism further includes a first gear plate and a second gear plate respectively disposed on both sides of the rotating shaft; the left and right sides of the sliding seat are respectively provided with an inclined extrusion plate and a push plate; the two inclined extrusion plates are respectively extruded into the two first gear plates and the second gear plate; the support frame is provided with two self-locking mechanisms; the self-locking mechanism includes two elastic shrink boxes; the two elastic shrink boxes are slidably mounted with angled mounting blocks; the bottom of the angled mounting blocks is provided with locking arc blocks; the two locking arc blocks are respectively disposed on both sides of the rotating shaft; the push plate is extruded into the two angled mounting blocks.

[0013] The above-described casting weld scar surface grinding device: the driving mechanism includes a limiting frame disposed on the rear side of the sliding seat and a moving block slidably mounted on the limiting frame. The moving block is provided with a driving motor and a transmission gear sleeved on the output shaft of the driving motor. A limiting roller is rotatably mounted on one end of the output shaft of the driving motor.

[0014] The above-described casting weld scar surface grinding device: the reciprocating mechanism includes a support platform set on the top of the worktable and an annular gear fixed on the support platform. The rear side of the annular gear is provided with an annular frame that matches its trajectory. The transmission gear meshes with the annular gear, and the limiting roller is set on the annular frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By adopting a layered and progressive grinding method, the amount of material removed is controlled layer by layer and the grinding depth is gradually increased, so that each grinding layer removes only a small amount of material, avoiding a sudden drop in local stiffness and stress concentration in the casting, and allowing the grinding casting to form a smooth transition zone and a stable surface.

[0017] This invention also allows the grinding wheel to move back and forth on the surface of the casting. During each reciprocating motion, the grinding depth is increased slightly, improving grinding efficiency and reducing the pressure on the grinding wheel, thus increasing its service life. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the grinding device for the surface of weld scars after welding repair of castings.

[0019] Figure 2 A rear view schematic diagram of the device for grinding the surface of weld scars after welding repair of castings.

[0020] Figure 3 A schematic diagram of the support frame, grinding mechanism, adjustment mechanism, and reciprocating mechanism in a grinding device for the surface of weld scars after welding repair of castings.

[0021] Figure 4 A schematic diagram of the grinding mechanism and adjustment mechanism in a surface grinding device for weld scars after welding repair of castings.

[0022] Figure 5 A schematic diagram of the elastic shrinkage box, beveled mounting block, and locking arc block in a grinding device for the surface of weld scars after welding repair of castings.

[0023] Figure 6 A schematic diagram of the first and second toothed discs in a grinding device for the surface of weld scars after welding repair of castings.

[0024] Figure 7 A schematic diagram of the grinding mechanism in a grinding device for surface grinding of weld scars after welding repair of castings.

[0025] Figure 8 A rear view schematic diagram of the grinding mechanism in a surface grinding device for repairing weld scars on cast parts after welding.

[0026] Figure 9 A schematic diagram of the reciprocating mechanism in a grinding device for the surface of weld scars after welding repair of castings.

[0027] Figure 10 A rear view schematic diagram of the reciprocating mechanism in a grinding device for the surface of weld scars after welding repair of castings.

[0028] In the diagram: 1. Worktable; 2. Four-jaw chuck; 3. Support frame; 4. Sliding seat; 5. Gear plate; 6. Moving platform; 7. Grinding motor; 8. Grinding wheel; 9. Angled extrusion plate; 10. Push plate; 11. Rotating shaft; 12. First gear plate; 13. Second gear plate; 14. Drive gear; 15. Elastic shrink box; 16. Angled mounting block; 17. Locking arc block; 18. Limiting slider; 19. Limiting frame; 20. Moving block; 21. Drive motor; 22. Transmission gear; 23. Limiting roller; 24. Support table; 25. Ring gear; 26. Ring frame. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Please see Figures 1-10 As an embodiment of this utility model, the welding scar surface grinding device after welding repair of the casting includes a worktable 1. Two four-jaw chucks 2 for fixing the casting are symmetrically arranged on the top of the worktable 1. A support frame 3 and a grinding mechanism for grinding the casting are arranged on the support frame 3. The grinding mechanism cooperates with the adjustment mechanism arranged on the support frame 3. A reciprocating mechanism is arranged on the top of the worktable 1.

[0031] The reciprocating mechanism includes an annular guide mechanism and a drive mechanism disposed on one side of the grinding mechanism, the drive mechanism cooperating with the reciprocating mechanism.

[0032] In this embodiment, the casting is clamped and fixed between two four-jaw chucks 2 in the initial state. The surface of the casting is then ground by a grinding mechanism. At the same time, the grinding mechanism performs reciprocating grinding on the surface of the casting by coordinating the adjustment mechanism and the reciprocating mechanism. The grinding depth is increased slightly with each reciprocating motion, so that only a small amount of material is removed from each layer of grinding. This avoids a sudden drop in local stiffness and stress concentration in the casting, and allows the ground casting to form a smooth transition zone and a stable surface.

[0033] As a further embodiment of this utility model, the grinding mechanism includes a sliding seat 4 slidably mounted on the support frame 3 and a limiting slider 18 disposed on the rear side of the sliding seat 4, wherein the limiting slider 18 slides on the support frame 3.

[0034] In this embodiment, the sliding seat 4 slides on the support frame 3, and the limiting slider 18 slides on one side of the support frame 3, so that the sliding seat 4 can slide smoothly on the support frame 3.

[0035] As a further embodiment of this utility model, the grinding mechanism further includes a movable platform 6 slidably installed in the sliding seat 4 and a toothed plate 5 fixed on the movable platform 6. A grinding motor 7 and a grinding wheel 8 sleeved on the output shaft of the grinding motor 7 are provided at the bottom of the movable platform 6.

[0036] In this embodiment, the grinding motor 7 can slide up and down within the sliding seat 4 via the moving platform 6, and the grinding wheel 8 can be rotated by starting the grinding motor 7.

[0037] As a further embodiment of this utility model, the adjustment mechanism includes a rotating shaft 11 rotatably mounted in the support frame 3 and a drive gear 14 sleeved on the rotating shaft 11, wherein the drive gear 14 meshes with the gear plate 5.

[0038] In this embodiment, the rotating shaft 11 rotates within the support frame 3, and the drive gear 14 sleeved on the rotating shaft 11 can mesh with the toothed plate 5. When the drive gear 14 rotates, it can drive the toothed plate 5 to move, thereby driving the moving platform 6 and the grinding motor 7 to move, thus realizing layered and progressive grinding treatment.

[0039] As a further embodiment of this utility model, the adjustment mechanism further includes a first gear plate 12 and a second gear plate 13 respectively disposed on both sides of the rotating shaft 11. An inclined pressing plate 9 and a pushing plate 10 are respectively disposed on the left and right sides of the sliding seat 4. The two inclined pressing plates 9 are respectively pressed into the two first gear plates 12 and the two second gear plates 13. Two self-locking mechanisms are disposed inside the support frame 3. The self-locking mechanism includes two elastic shrink boxes 15. An inclined mounting block 16 is slidably mounted on the two elastic shrink boxes 15. A locking arc block 17 is disposed at the bottom of the inclined mounting block 16. The two locking arc blocks 17 are respectively disposed on both sides of the rotating shaft 11. The pushing plate 10 is pressed into the two inclined mounting blocks 16.

[0040] In this embodiment, the first gear disk 12 and the second gear disk 13 are provided with a number of oblique teeth. The oblique teeth on the first gear disk 12 and the second gear disk 13 are misaligned. When the sliding seat 4 moves towards the first gear disk 12, as the sliding seat 4 moves continuously, the push plate 10 first contacts the two oblique mounting blocks 16. Subsequently, due to the oblique angle of the two oblique mounting blocks 16, the push plate 10 can push the two oblique mounting blocks 16 out to both sides, which can drive the two locking arc blocks 17 to move to both sides and leave the surface of the rotating shaft 11, causing the rotating shaft 11 to lose its lock. Simultaneously, the oblique pressing plate 9 and the first gear disk 12... The oblique teeth make contact, thereby squeezing the oblique teeth and causing the first toothed disc 12 to rotate to one side under the squeezing force. At this time, the rotating shaft 11 and the second toothed disc 13 rotate. At the same time, the drive gear 14 sleeved on the rotating shaft 11 can mesh with the toothed plate 5. When the drive gear 14 rotates, it can drive the toothed plate 5 to move, thereby driving the moving platform 6 and the grinding motor 7 to move, thereby realizing layered and progressive grinding. When the sliding seat 4 leaves, the push plate 10 leaves between the two oblique mounting blocks 16, so that the elastic force makes the two locking arc blocks 17 reset, and then the rotating shaft 11 is locked to prevent it from rotating.

[0041] As a further embodiment of this utility model, the driving mechanism includes a limiting frame 19 disposed on the rear side of the sliding seat 4 and a moving block 20 slidably mounted on the limiting frame 19. The moving block 20 is provided with a driving motor 21 and a transmission gear 22 sleeved on the output shaft of the driving motor 21. A limiting roller 23 is rotatably mounted on one end of the output shaft of the driving motor 21.

[0042] In this embodiment, the drive motor 21 can slide up and down on the limiting frame 19 via the moving block 20.

[0043] As a further embodiment of this utility model, the reciprocating mechanism includes a support platform 24 disposed on the top of the workbench 1 and an annular gear 25 fixed on the support platform 24. An annular frame 26 matching its trajectory is disposed on the rear side of the annular gear 25. The transmission gear 22 meshes with the annular gear 25, and the limiting roller 23 is disposed on the annular frame 26.

[0044] In this embodiment, the drive motor 21 is started to make the transmission gear 22 rotate. When the transmission gear 22 rotates, it meshes with the ring gear 25. At the same time, the limiting roller 23 limits the movement trajectory of the drive motor 21 and the transmission gear 22. As the transmission gear 22 rotates continuously inside the ring gear 25, the sliding seat 4 moves back and forth to achieve back and forth grinding.

[0045] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. A grinding device for the surface of weld scars after welding repair of castings, comprising a worktable (1), characterized in that, The worktable (1) is symmetrically provided with two four-jaw chucks (2) for fixing castings. The worktable (1) is provided with a support frame (3) and a grinding mechanism for grinding the castings on the support frame (3). The grinding mechanism cooperates with the adjustment mechanism on the support frame (3). The worktable (1) is provided with a reciprocating mechanism. The reciprocating mechanism includes an annular guide mechanism and a drive mechanism disposed on one side of the grinding mechanism, the drive mechanism cooperating with the reciprocating mechanism.

2. The device for grinding the surface of weld scars after welding repair of castings according to claim 1, characterized in that, The polishing mechanism includes a sliding seat (4) slidably mounted on the support frame (3) and a limiting slider (18) disposed on the rear side of the sliding seat (4), the limiting slider (18) sliding on the support frame (3).

3. The device for grinding the surface of weld scars after welding repair of castings according to claim 2, characterized in that, The grinding mechanism also includes a movable platform (6) slidably mounted in the sliding seat (4) and a toothed plate (5) fixed on the movable platform (6). The bottom of the movable platform (6) is provided with a grinding motor (7) and a grinding wheel (8) sleeved on the output shaft of the grinding motor (7).

4. The device for grinding the surface of weld scars after welding repair of castings according to claim 3, characterized in that, The adjustment mechanism includes a rotating shaft (11) rotatably mounted in the support frame (3) and a drive gear (14) sleeved on the rotating shaft (11), the drive gear (14) meshing with the toothed plate (5).

5. A grinding device for the surface of weld scars after welding repair of castings according to claim 4, characterized in that, The adjustment mechanism also includes a first gear plate (12) and a second gear plate (13) respectively disposed on both sides of the rotating shaft (11). An inclined extrusion plate (9) and a push plate (10) are respectively disposed on the left and right sides of the sliding seat (4). The two inclined extrusion plates (9) are respectively extruded and cooperate with the two first gear plates (12) and the two gear plates (13). Two self-locking mechanisms are disposed in the support frame (3). The self-locking mechanism includes two elastic shrink boxes (15). An inclined mounting block (16) is slidably installed on the two elastic shrink boxes (15). A locking arc block (17) is disposed at the bottom of the inclined mounting block (16). The two locking arc blocks (17) are respectively disposed on both sides of the rotating shaft (11). The push plate (10) is extruded and cooperates with the two inclined mounting blocks (16).

6. The device for grinding the surface of weld scars after welding repair of castings according to claim 5, characterized in that, The driving mechanism includes a limiting frame (19) disposed on the rear side of the sliding seat (4) and a moving block (20) slidably mounted on the limiting frame (19). The moving block (20) is provided with a driving motor (21) and a transmission gear (22) sleeved on the output shaft of the driving motor (21). A limiting roller (23) is rotatably mounted on one end of the output shaft of the driving motor (21).

7. A grinding device for the surface of weld scars after welding repair of castings according to claim 6, characterized in that, The reciprocating mechanism includes a support platform (24) set on the top of the worktable (1) and an annular gear (25) fixed on the support platform (24). The rear side of the annular gear (25) is provided with an annular frame (26) that matches its trajectory. The transmission gear (22) meshes with the annular gear (25), and the limiting roller (23) is set on the annular frame (26).

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