Laser repairing equipment for damaged surface of gear

Abstract

The invention provides laser repairing equipment for a damaged surface of a gear, and the laser repairing equipment comprises a laser cladding head, the laser cladding head comprises a cladding head body, the cladding head body is provided with a powder feeding cavity, one end of the powder feeding cavity extends to a first surface, and a powder outlet is formed in the first surface; the first light passing pipe is inserted into the cladding head body, one end of the first light passing pipe penetrates out of the second surface, the other end of the first light passing pipe penetrates through the powder feeding cavity in the set direction and extends to the powder outlet, and the first light passing pipe is movably arranged in the set direction; the second light passing pipe is arranged on the cladding head body and located on the side, away from the powder outlet, of the first light passing pipe, and the end, close to the second surface, of the second light passing pipe is movably inserted into the first light passing pipe, so that the falling point range of the repairing powder on the laser spots can be adjusted; the problem that powder in a drop point area is not melted completely due to the fact that the accumulation amount is large is effectively solved, and the laser repairing effect of laser repairing equipment on the damaged tooth surface is improved.

Description

Technical Field

[0001] The present invention generally relates to the technical field of gear repair, and in particular to a laser repair device for a damaged surface of a gear. Background Art

[0002] As one of the core parts in the transmission mechanism, the quality of the gear affects the operating stability of the transmission mechanism. After long-term use, the gear tooth surface will be damaged. In order to extend the service life of the gear, laser repair equipment is usually used to clad the damaged tooth surface of the gear. Specifically, the laser repair equipment includes a laser cladding head, which can output a laser beam and repair powder. The laser beam acts on the damaged tooth surface and forms a molten pool at the laser spot. The repair powder is transported to the molten pool and melted in the molten pool. After cooling, the damaged tooth surface is repaired.

[0003] The Chinese patent (patent application number: 202111246909.1) discloses a laser powder feeding cladding head, which is formed with an annular powder feeding compression channel. The width of the tail of the annular powder feeding compression channel gradually narrows along the direction extending from the front end of the light output center channel to the tail end of the light output center channel. During the powder feeding process, the powder enters from the powder inlet on the outer peripheral wall of the tail end protective sleeve under the action of the powder feeding airflow, and after being pressurized by the annular powder feeding compression channel, the powder is discharged from the peripheral side of the light output center channel and converges to the laser focusing point.

[0004] However, the above laser cladding head has the following problems: The landing area of ​​the powder output through the annular powder feeding compression channel is fixed, so the powder in the landing area is not completely melted due to the large amount of accumulation, which affects the laser repair effect of the damaged tooth surface. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a laser repair device for a damaged surface of a gear.

[0006] The present application provides a laser repair device for a damaged gear surface, including a laser cladding head, the laser cladding head including: A cladding head body, wherein the cladding head body has a first surface and a second surface opposite to each other along a set direction, and the cladding head is formed with a powder feeding cavity, one end of the powder feeding cavity extends to the first surface and forms a powder outlet on the first surface; A first light-passing tube, which is inserted into the cladding head body, one end of the first light-passing tube passes through the second surface, and the other end of the light-passing tube passes through the powder delivery cavity along a set direction and extends to the powder outlet, and the first light-passing tube is movably arranged along the set direction; The second light-passing tube is arranged on the cladding head body and is located on the side of the first light-passing tube away from the powder outlet. One end of the second light-passing tube close to the second surface is movably inserted in the first light-passing tube.

[0007] Furthermore, a movable seal is provided between the light tube and the cladding head body, a covering ring is provided on the outer peripheral wall of the first light tube, and the covering ring is located in the powder feeding chamber, the cladding head body is provided with a first through hole for the first light tube to pass through, and the cladding head body is also provided with an exhaust hole located on the side of the covering ring close to the second surface, one end of the exhaust hole extends to the second surface and the other end extends to the powder feeding chamber, and the covering ring can open and close the exhaust hole under the drive of the first light tube.

[0008] Furthermore, it also includes an end cover, which is covered on the second surface. The end cover is provided with a step through hole that is arranged along a set direction. The step through hole includes a first hole segment and a second hole segment that are connected. The aperture of the second hole segment is larger than the aperture of the first hole segment and is located on the side of the first hole segment close to the second surface. The second light pipe is inserted in the first hole segment and one end extends to the second hole segment. The second hole segment is provided with a driving device, and the driving device cooperates with the first light pipe to drive the first light pipe to move.

[0009] Furthermore, a lap ring is provided on the outer periphery of the outlet end of the first light-transmitting tube, and the driving device includes a push ring and a driving motor, the push ring is sleeved on the outer periphery of the first light-transmitting tube, the lap ring is located on the side of the push ring away from the second surface and overlapped with the push ring, one of the push ring and the driving matching ring is provided with a push protrusion and the other is provided with an arc-shaped guide groove, the push protrusion is slidably matched with the guide groove, wherein the depth of the guide groove is set to be a single gradient along the arc direction, and the driving motor and the push ring are driven to cooperate to drive the push ring to rotate.

[0010] Furthermore, there are multiple guide grooves and push protrusions, which are arranged in one-to-one correspondence, and the multiple guide grooves are arranged at intervals along the direction surrounding the first light pipe.

[0011] Furthermore, the push protrusion is hemispherical.

[0012] Furthermore, a rotation-stopping component is provided between the first light-transmitting tube and the second light-transmitting tube.

[0013] Furthermore, the anti-rotation assembly includes an anti-rotation protrusion and an anti-rotation groove, one of the anti-rotation protrusion and the anti-rotation groove is located at the first light pipe and the other is located at the second light pipe, the anti-rotation groove is arranged along a set direction, and the anti-rotation protrusion is slidably arranged in the anti-rotation groove.

[0014] The laser repair equipment for the damaged surface of a gear provided in the present application can change the powder output range of the repair powder by moving the first light pipe along the laser direction, so that the landing range of the repair powder on the laser spot can be adjusted, thereby effectively solving the problem of incomplete melting of powder in the landing area due to a large amount of powder accumulation, thereby improving the laser repair effect of the laser repair equipment on the damaged tooth surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 A half-section schematic diagram of a laser cladding head provided in an embodiment of the present application; Figure 2 for Figure 1 A partial enlarged view of the structure shown. DETAILED DESCRIPTION

[0016] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0017] Please refer to the attached Figure 1-2 The embodiment of the present application provides a laser repair device for a damaged gear surface, including a laser cladding head, the laser cladding head including a cladding head body 100 and a light pipe disposed on the cladding head body 100, the light pipe is used for passing a laser beam, the light pipe is a segmented structure and includes a first light pipe 200 and a second light pipe 300. The cladding head body 100 is in an inverted truncated cone shape, and has a first surface 102 and a second surface opposite to each other along a set direction, and the diameter of the first surface 102 is smaller than the diameter of the second surface. As shown in the attached Figure 1The viewing angle is the reference viewing angle, and the set direction is the vertical direction. The cladding head is formed with a powder feeding chamber, one end of which extends to the first surface 102 and forms a powder outlet 103 on the first surface 102. The first light pipe 200 is inserted into the cladding head body 100, wherein one end of the first light pipe 200 passes through the second surface, and the other end of the first light pipe 200 passes through the powder feeding chamber along the set direction and extends to the powder outlet 103, that is, the first light pipe 200 divides the powder feeding chamber into two parts, the part of the powder feeding chamber located in the first light pipe 200 forms a light channel, and the part of the powder feeding chamber surrounding the outer periphery of the first light pipe 200 forms a powder gas channel 101, and the powder gas channel 101 is used for passing the inert gas carrying the repair powder. The second light pipe 300 is arranged on the cladding head body 100 and is located on the side of the first light pipe 200 away from the powder outlet 103. The end of the second light pipe 300 close to the second surface is movably inserted in the first light pipe 200. The laser emitter of the laser repair equipment is installed on the side of the second light pipe 300 away from the second surface and is arranged toward the second light pipe 300. The laser output by the laser emitter is sequentially irradiated on the damaged tooth surface through the second light pipe 300 and the first light pipe 200. A powder gas output channel is formed between the end of the first light pipe 200 away from the second surface and the cladding head body 100. The first light pipe 200 is movably arranged in a set direction, which can change the powder output size of the powder gas, and then change the powder output range of the powder gas, that is, change the powder output range of the repair powder, so that the landing point range of the repair powder on the laser spot can be adjusted, effectively solving the problem that the powder in the landing point area is not completely melted due to a large amount of accumulation, and improving the laser repair effect of the laser repair equipment on the damaged tooth surface.

[0018] The outer peripheral surface of the powder feeding chamber is an inverted conical surface, and the diameter of the end close to the second surface is larger than the diameter of the end away from the second surface. A powder gas inlet 104 is provided on the circumferential side wall of the cladding head body 100, and the powder feeding device of the laser repair equipment inputs powder gas into the powder gas channel 101 through the powder gas inlet 104.

[0019] Among them, the moving distance of the first light guide in the vertical direction is controlled at 1-3mm, which can be 2mm or the like. The movement of the first light guide in the vertical direction has an upper limit position and a lower limit position, and the lower limit position is located below the upper limit position. Optionally, when located at the lower limit position, the bottom end of the first light tube 200 is flush with the powder outlet 103 or the bottom end of the first light tube 200 is located above the powder outlet 103 and the distance from the powder outlet 103 is less than 1mm. Optionally, during each laser repair process, the first light tube 200 can complete the path movement from the upper limit position, the lower limit position to the upper limit position at a basically uniform speed.

[0020] In some embodiments of the present application, a movable seal is provided between the first light pipe 200 and the cladding head body 100. Specifically, the cladding head body 100 is provided with a first through hole located on the side of the powder feeding chamber close to the second surface, one end of the first through hole extends to the second surface and the other end extends to the powder feeding chamber, the first light pipe 200 is movably inserted in the first through hole, a movable seal is provided between the first through hole and the first light pipe 200 and the movable seal is installed on the hole wall of the first through hole, the movable seal can be an O-ring, the number of O-rings can be but is not limited to multiple and multiple seals are arranged in sequence along a set direction. The above movable seal can prevent powder gas from leaking from between the first through hole and the first light pipe 200 when the first light pipe 200 moves. A cover ring 210 is provided on the outer peripheral wall of the first light pipe 200, and the cover ring 210 is located in the powder feeding chamber. The cladding head body 100 is also provided with an exhaust hole 105 located on the side of the cover ring 210 close to the second surface. One end of the exhaust hole 105 extends to the second surface and the other end extends to the powder feeding chamber. The projection of the exhaust hole 105 along the set direction is located within the projection range of the cover ring 210. Optionally, the number of the exhaust holes 105 can be multiple and evenly arranged around the first perforation. The cover ring 210 can open and close the exhaust hole 105 under the drive of the first light pipe 200. Specifically, when the first light pipe 200 moves to the upper limit position, the cover ring 210 covers the exhaust hole 105; when the first light pipe 200 moves from the upper limit position to the lower limit position, the cover ring 210 and the exhaust hole 105 are separated, and when the first light pipe 200 is at the lower limit position, the gap between the cover ring 210 and the exhaust hole 105 is the largest.

[0021] During the movement of the first light pipe 200 from the upper limit position to the lower limit position, the size and range of the powder gas outlet of the powder gas channel 101 are both reduced, which will increase the air pressure in the powder gas channel 101. At the same time, during the movement, there is a gap between the cover ring 210 and the exhaust hole 105 (the exhaust hole 105 is opened) and the gap increases. At this time, part of the gas in the powder gas channel 101 can be discharged through the exhaust hole 105, and the exhaust volume increases as the gap increases, which will reduce the air pressure in the powder gas channel 101. Thus, the pressure change in the powder gas channel 101 is compensated, so that the pressure in the powder gas channel 101 is kept within a stable range, thereby ensuring the uniformity of powder output. In addition, in the prior art, the width of the tail of the annular powder feeding compression channel gradually narrows along the direction extending from the front end of the light outlet center channel to the tail end of the light outlet center channel. The powder output from the annular powder feeding compression channel has a large speed under the action of pressure, and it is easy for the powder to rebound out of the molten pool. In this embodiment, the speed of the powder output from the powder gas channel 101 is relatively low, which reduces the rebound amount of the powder and improves the powder utilization rate.

[0022] In some embodiments of the present application, the laser cladding head further includes an end cap 400, which is covered on the second surface and is detachably fixedly connected to the cladding head body 100, and the detachable connection method may be but is not limited to screw connection, etc. The end cap 400 is provided with a stepped through hole arranged along a set direction, and the stepped through hole includes a first hole segment 401 and a second hole segment 402 connected to each other, the aperture of the second hole segment 402 is larger than the aperture of the first hole segment 401 and is located on the side of the first hole segment 401 close to the second surface, the second light pipe 300 is fixedly inserted in the first hole segment 401 and one end extends to the second hole segment 402, and the end of the first light pipe 200 extends into the second hole segment 402 and is sleeved on the outer periphery of the second light pipe 300. The second hole segment 402 is provided with a driving device, and the driving device cooperates with the first light pipe 200 to drive the first light pipe 200 to move.

[0023] The projection of the exhaust hole 105 along the set direction is located within the projection range of the second hole segment 402 , and there is a gap between the exhaust hole 105 and the driving device.

[0024] In some embodiments of the present application, a fixing seat 410 is fixed in the second hole section 402, a through hole is provided in the middle of the fixing seat 410 for the first light pipe 200 to pass through, and the fixing seat 410 and the step surface of the step hole are arranged at intervals. A lap ring 220 is provided on the outer periphery of the passing end of the first light pipe 200, and the lap ring 220 is located between the fixing seat 410 and the step surface. The driving device includes a push ring 420 and a driving motor, the push ring 420 is arranged on the fixing seat 410 and sleeved on the outer periphery of the first light pipe 200, there is a gap between the push ring 420 and the first light pipe 200, and the lap ring 220 is located on the side of the push ring 420 away from the second surface and overlaps the push ring 420. One of the push ring 420 and the driving matching ring is provided with a push protrusion 421 and the other is provided with an arc-shaped guide groove 221. The push protrusion 421 is slidably matched with the guide groove 221, wherein the depth of the guide groove 221 is set to be gradually changed along the arc direction. The driving motor and the push ring 420 are driven to cooperate to drive the push ring 420 to rotate.

[0025] In this embodiment, the push ring 420 is driven by the driving motor to automatically rotate, and the self-rotating push ring 420 drives the push protrusion 421 to slide in the guide groove 221. Since the depth of the guide groove 221 is set to be gradually changed along the arc direction, the lap ring 220 can move in the direction close to or away from the push ring 420 under the pushing action of the push ring 420, thereby driving the first light pipe 200 to move up and down. The above-mentioned driving device has a simple structure and is easy to implement.

[0026] Optionally, the push protrusion 421 is protruding from the side of the push ring 420 away from the second surface, the guide groove 221 is located on the side of the lap ring 220 close to the push ring 420, and the groove depth of the guide groove 221 decreases in the direction away from the push ring 420.

[0027] Optionally, the pushing protrusion 421 is hemispherical.

[0028] Optionally, the number of the guide grooves 221 can be multiple and spaced around the first light pipe 200 , and the pushing protrusions 421 match the number of the guide grooves 221 and are arranged in one-to-one correspondence.

[0029] Optionally, there is a gap between the fixing seat 410 and the second surface, and the two are surrounded to form a temporary storage space 403, and the end cover 400 is provided with an air guide hole 404, one end of the air guide hole 404 is connected to the temporary storage space 403 and the other end penetrates the outer surface of the end cover 400 and forms an air guide port on the outer surface of the end cover 400, and the air guide port is connected to an air guide pipe. The air guide pipe can discharge the powder gas accumulated in the temporary storage space 403 to the outside, so as to recover the powder gas discharged from the temporary storage space 403.

[0030] Optionally, a mounting ring 411 is provided on one side of the fixing seat 410 close to the lap ring 220, and the mounting ring 411 surrounds the through hole, and the push ring 420 is mounted on the outer periphery of the mounting ring 411 through a bearing, so that the push ring 420 can rotate. The push ring 420 can be a push gear, and the output shaft of the driving motor extends into the second hole section 402 and cooperates with the push gear.

[0031] In order to prevent the overlapping ring 220 from rotating when the push ring 420 drives the overlapping ring 220 to move along the set direction, a rotation-stopping assembly is provided between the first light pipe 200 and the second light pipe 300. Optionally, the rotation-stopping assembly includes a rotation-stopping protrusion and a rotation-stopping groove, one of which is located on the first light pipe 200 and the other is located on the second light pipe 300, the rotation-stopping groove is provided along the set direction, and the rotation-stopping protrusion is slidably provided in the rotation-stopping groove.

[0032] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means more than two.

[0033] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A laser repair device for a damaged gear surface, comprising a laser cladding head, characterized in that: The laser cladding head comprises: A cladding head body, wherein the cladding head body has a first surface and a second surface opposite to each other along a set direction, and the cladding head is formed with a powder feeding cavity, one end of the powder feeding cavity extends to the first surface and forms a powder outlet on the first surface; a first light-passing tube, wherein the first light-passing tube is inserted into the cladding head body, one end of the first light-passing tube passes through the second surface, the other end of the first light-passing tube passes through the powder delivery cavity along the set direction and extends to the powder outlet, and the first light-passing tube is movably arranged along the set direction; A second light-passing tube is arranged on the cladding head body and is located on a side of the first light-passing tube away from the powder outlet, and one end of the second light-passing tube close to the second surface is movably inserted into the first light-passing tube.

2. The laser repair equipment for gear damaged surface according to claim 1, characterized in that: A movable seal is provided between the light passing tube and the cladding head body, a covering ring is provided on the outer peripheral wall of the first light passing tube, and the covering ring is located in the powder feeding chamber, the cladding head body is provided with a first through hole for the first light passing tube to pass through, the cladding head body is further provided with an exhaust hole located on the side of the covering ring close to the second surface, one end of the exhaust hole extends to the second surface and the other end extends to the powder feeding chamber, and the covering ring can open and close the exhaust hole under the drive of the first light passing tube.

3. The laser repair equipment for gear damaged surface according to claim 2, characterized in that: It also includes an end cover, which is covered on the second surface. The end cover is provided with a stepped through hole that is penetrated along the set direction. The stepped through hole includes a first hole segment and a second hole segment that are connected. The aperture of the second hole segment is larger than the aperture of the first hole segment and is located on the side of the first hole segment close to the second surface. The second light pipe is inserted in the first hole segment and one end extends to the second hole segment. The second hole segment is provided with a driving device, and the driving device cooperates with the first light pipe to drive the first light pipe to move.

4. The laser repair equipment for gear damaged surface according to claim 3, characterized in that: A lap ring is provided on the outer circumference of the outlet end of the first light-transmitting tube, and the driving device includes a push ring and a driving motor. The push ring is sleeved on the outer circumference of the first light-transmitting tube, and the lap ring is located on the side of the push ring away from the second surface and overlapped with the push ring. One of the push ring and the driving matching ring is provided with a push protrusion and the other is provided with an arc-shaped guide groove. The push protrusion is slidably matched with the guide groove, wherein the depth of the guide groove is set to be gradually changed in a single manner along the arc direction, and the driving motor and the push ring are driven to cooperate to drive the push ring to rotate.

5. The laser repair equipment for gear damaged surface according to claim 4, characterized in that: The number of the guide grooves and the push protrusions are both multiple and arranged in one-to-one correspondence, and the multiple guide grooves are arranged at intervals along the direction surrounding the first light pipe.

6. The laser repair equipment for gear damaged surface according to claim 4, characterized in that: The pushing protrusion is hemispherical.

7. The laser repair equipment for gear damaged surface according to claim 1, characterized in that: A rotation-stop component is provided between the first light-transmitting tube and the second light-transmitting tube.

8. The laser repair equipment for gear damaged surface according to claim 7, characterized in that: The anti-rotation assembly includes an anti-rotation protrusion and an anti-rotation groove, one of the anti-rotation protrusion and the anti-rotation groove is located in the first light pipe and the other is located in the second light pipe, the anti-rotation groove is arranged along the set direction, and the anti-rotation protrusion is slidably arranged in the anti-rotation groove.

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