A welding device for processing a turbine moving blade of a combustion engine

Abstract

The application discloses a welding device for turbine moving blade machining of a gas turbine, and relates to the technical field of turbine moving blade machining of a gas turbine, which comprises a base and a welding positioning jig, wherein the welding positioning jig is installed on the base. The welding device for turbine moving blade machining of a gas turbine, by means of adsorption and fixation of the blade in the corresponding blade positioning inclined groove when the blade is in the welding station, guarantees the stability of the blade during welding, and improves the welding quality. The application realizes automatic switching of air passage on-off by rotation of the rotating seat itself. Only when the rotating seat rotates intermittently to the welding station, the L-shaped air passage is connected with the negative pressure interface of the supporting cylinder, so that precise adsorption and fixation of the blade in the welding station is realized, the difficulty in taking and placing the blade caused by adsorption in the non-welding station is avoided, the negative pressure adsorption force uniformly acts on the bottom of the blade, compared with the mechanical clamp, the risk of deformation of the blade is reduced, the relative position between the blade and the wheel disc during welding is ensured to be stable, and the probability of weld offset is reduced.

Description

Technical Field

[0001] This invention relates to the field of gas turbine blade processing technology, specifically a welding device for processing gas turbine blades. Background Technology

[0002] Turbine blades are core components in turbomachinery (such as steam turbines, gas turbines, and aero engines), responsible for converting the energy of fluids (steam, gas, or air) into mechanical energy. Their working principle is based on fluid dynamics, using high-speed rotating blades to convert the kinetic and pressure energy of the fluid into the rotational power of the shaft. Turbine blades are usually made of high-temperature alloys (such as nickel-based alloys) or ceramic matrix composites to withstand extreme temperatures and pressures.

[0003] The core operation of the welding device for processing turbine blades in the existing technology is as follows: start the rotating base, the wheel rotates at a constant speed, the welding torch is aimed at the joint between the blade root and the wheel, and welding is performed according to the preset path and parameters. However, the existing devices mostly require manual placement of the blade into the wheel groove and adjustment of the angle, and the use of mechanical clamps to directly clamp the blade. This not only easily causes blade deformation, but also easily leads to inaccurate blade positioning due to human operation errors. In addition, the wheel rotation and blade feeding are mostly controlled independently, making it difficult to achieve coordinated action and causing delays in process connection. Traditional devices mostly use a fixed-angle welding torch or manually adjust the welding torch path, which is difficult to accurately match the welding requirements of blades with different taper, and is prone to defects such as non-fitting welds and uneven weld leg height. For processing blades of multiple specifications, the welding torch parameters and path need to be readjusted, which is time-consuming and costly. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for processing turbine blades of gas turbines, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding device for processing turbine blades, comprising a base and a welding positioning fixture. The welding positioning fixture is mounted on the base and includes a support cylinder fixedly mounted on the base. The bottom side of the support cylinder is connected to an air nozzle, and the top side of the support cylinder is provided with a negative pressure interface. A rotating seat is rotatably mounted on the top of the support cylinder, and a wheel positioning core groove is recessed in the middle of the rotating seat. A positioning column is fixedly mounted in the middle of the bottom of the wheel positioning core groove, and the wheel to be processed is positioned inside the wheel positioning core groove by the positioning column. Blade positioning grooves are concentrically arrayed around the rotating seat, and the taper of the blade positioning grooves matches the designed installation angle of the blade. A contoured convex ridge is correspondingly provided at the bottom of the outer edge of the blade positioning groove, and the contoured convex ridge is consistent with the taper of the blade positioning groove. Each blade positioning groove bottom is connected to an air passage, and the cross-section of the air passage is "L" shaped.

[0006] Furthermore, the support cylinder is connected to a negative pressure pump via an air nozzle to generate negative pressure inside the cavity. When the rotating seat is in a preset position, the corresponding "L"-shaped air passage is connected to the negative pressure interface at the top side of the support cylinder to achieve adsorption and fixation of the blade in the corresponding blade positioning groove.

[0007] Furthermore, a support member is fixedly installed around the top of the base, and the end of the support member facing away from the base is fixed to the mounting plate.

[0008] Furthermore, a contour welding assembly is installed on the side of the mounting plate. The contour welding assembly includes a side plate welded and fixed to the side of the mounting plate. A follower rod is vertically slidably installed at the end of the side plate, and a roller is rotatably installed at the end of the follower rod via a shaft bracket. The roller abuts against the contour protrusion at the bottom of the outer edge of the blade positioning groove.

[0009] Furthermore, the contour welding assembly also includes a spring sleeved on the outside of the follower rod, the side plate is elastically connected to the outer shaft of the roller through the spring, and an extension rod is radially fixed on the side of the top end of the follower rod.

[0010] Furthermore, the contour welding assembly also includes connecting arms fixedly installed on both sides of the end of the extension rod. A welding torch is clamped and fixed inside the connecting arm, and the welding torch is located at the junction of the blade positioning groove and the wheel positioning core groove. The follower rod drives the welding torch to move in contour at a preset blade installation angle by the rolling of the roller on the contour convex cone surface.

[0011] Furthermore, a synchronous drive assembly is installed on the side of the base. The synchronous drive assembly includes a motor fixedly installed on the side of the base. A cam is coaxially fixed at the bottom of the rotating end of the motor, and an eccentric pin protrudes from the side of the cam disc.

[0012] Furthermore, the synchronous drive assembly also includes a grooved wheel mounted on the side of the cam, the groove on the outer edge of the grooved wheel intermittently meshing with the eccentric pin on the side of the cam disc, and the grooved wheel is rotated and driven by a connecting bushing and a rotating seat.

[0013] Furthermore, the synchronous drive assembly also includes an eccentric wheel coaxially fixed to the top of the rotating end of the motor. An eccentric pin is rotatably connected to the side of the eccentric wheel disc, and the end of the crank away from the pin on the eccentric wheel disc is rotatably connected to a slider. The slider is slidably mounted on a guide rail, and the guide rail is fixedly mounted on the side of the mounting plate.

[0014] Furthermore, the synchronous drive assembly also includes a connecting rod fixedly installed on the top of the slider. A push rod is fixedly connected to the top of the connecting rod, and the push rod slides horizontally at the bottom of the blade magazine groove. The blade magazine is supported and fixed to the side of the mounting plate by an overhead bracket. The discharge end of the blade magazine is located at the outer circle side of the rotating seat. The blade to be installed at the bottom of the blade magazine groove falls into the blade positioning groove on the outer circle of the rotating seat under the intermittent push of the push rod and adjusts the placement angle by conforming to the taper of the blade positioning groove.

[0015] This invention provides a welding device for machining turbine blades of gas turbines, which has the following beneficial effects; 1. In use, this application ensures the stability of the blade during welding by adsorbing and fixing it in the corresponding blade positioning groove when the blade is in the welding position, thereby improving the welding quality. This application utilizes the rotation of the rotating seat to achieve automatic switching of the air passage. Only when the rotating seat intermittently rotates to the welding position will the "L"-shaped air passage be connected to the negative pressure interface of the support cylinder, thereby achieving precise adsorption and fixing of the blade at the welding position. This avoids the difficulty in picking up and putting down the blade caused by adsorption at non-welding positions. The negative pressure adsorption force is evenly applied to the bottom of the blade, which reduces the risk of blade deformation compared to mechanical clamps, ensures the stability of the relative position of the blade and the wheel during welding, and reduces the probability of weld seam deviation.

[0016] 2. This application, on the one hand, uses a motor to synchronously drive the cam and grooved wheel mechanism, enabling the rotary seat to rotate intermittently. This ensures that the wheel accurately stops at the preset position after each rotation, providing a stable foundation for the orderly connection of processes such as blade feeding, adsorption fixing, and welding, and avoiding process chaos caused by continuous rotation. On the other hand, the motor drives the eccentric wheel-crank-slider mechanism, which drives the push rod to automatically push the blades to be installed in the blade magazine into the blade positioning groove of the rotary seat. This eliminates the need for manual placement of blades, reducing human intervention. At the same time, the tapered design of the blade positioning groove automatically adjusts the blade placement angle, avoiding errors from manual adjustment and improving the initial positioning accuracy of the blades. The intermittent rotation of the wheel driven by the same motor and the automatic blade feeding achieve synchronous coordination of blade feeding as the wheel arrives, reducing the response delay of individual drive mechanisms, shortening the preparation time for single blade processing, and improving overall processing efficiency.

[0017] 3. In use, when the rotating seat rotates intermittently under the drive of the motor, the contouring ridge at the bottom of the outer edge of the blade positioning groove will also rotate. When the blade is sent to the welding station with the intermittent rotation of the rotating seat, the roller at the end of the follower rod installed on the side plate of the welding station rolls on the conical surface of the contouring ridge. Through the structural design that the contouring ridge and the blade positioning groove have the same taper, the welding torch located at the junction of the blade positioning groove and the wheel positioning core groove moves in a contouring manner at a preset blade installation angle, thereby achieving welding and fixing at the junction of the blade and the wheel. The contouring movement of the welding torch is automatically achieved by the mechanical structure, without the need for repeated manual adjustment of the welding torch angle and path. It is especially suitable for batch processing of blades of various specifications, improving the versatility and debugging efficiency of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a cross-sectional view of the device of the present invention; Figure 3 This is a cross-sectional view of the welding positioning fixture of the present invention; Figure 4 This is a schematic diagram of the synchronous drive component of the present invention from one perspective. Figure 5 This is a schematic diagram of the synchronous drive component of the present invention from a second perspective. Figure 6 This is a schematic diagram of the contour welding assembly structure of the present invention.

[0019] In the diagram: 1. Base; 2. Welding positioning fixture; 201. Support cylinder; 202. Air nozzle; 203. Negative pressure interface; 204. Rotary seat; 205. Wheel positioning core groove; 206. Positioning column; 207. Blade positioning oblique groove; 208. Contouring ridge; 209. Air passage; 3. Support component; 4. Mounting plate; 5. Contouring welding assembly; 501. Side plate; 502. Follower rod; 503. Roller; 504. Spring; 505. Extension rod; 506. Connecting arm; 507. Welding torch; 6. Synchronous drive assembly; 601. Motor; 602. Cam; 603. Grooved wheel; 604. Connecting bushing; 605. Eccentric wheel; 606. Crank; 607. Slider; 608. Guide rail; 609. Connecting rod; 610. Push rod; 611. Blade magazine. Detailed Implementation

[0020] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention. Please see Figures 1 to 3This invention provides a technical solution: a welding device for processing turbine blades, comprising a base 1 and a welding positioning fixture 2. The welding positioning fixture 2 is mounted on the base 1. The welding positioning fixture 2 includes a support cylinder 201 fixedly mounted on the base 1. A gas nozzle 202 is connected to the bottom side of the support cylinder 201, and a negative pressure port 203 is opened at the top side of the support cylinder 201. A rotating seat 204 is rotatably mounted on the top of the support cylinder 201. A wheel positioning core groove 205 is recessed in the middle of the rotating seat 204, and a positioning post 206 is fixedly mounted in the middle of the bottom of the wheel positioning core groove 205. The wheel to be processed is positioned inside the wheel positioning core groove 205 by the positioning post 206. The rotating seat 204 has four... The Zhou Tongxin array has a blade positioning groove 207, and the taper of the blade positioning groove 207 matches the blade design installation angle. A contoured convex ridge 208 is correspondingly provided at the bottom of the outer edge of the blade positioning groove 207, and the contoured convex ridge 208 is consistent with the taper of the blade positioning groove 207. Each blade positioning groove 207 has a corresponding air passage 209 at the bottom, and the air passage 209 has an "L" shaped cross section. The support cylinder 201 is connected to the negative pressure pump through the air nozzle 202 to generate negative pressure inside the cavity. When the rotating seat 204 is in the preset position, the "L" shaped air passage 209 at the corresponding position is connected to the negative pressure interface 203 at the top side of the support cylinder 201 to achieve adsorption and fixation of the blade in the corresponding blade positioning groove 207. The specific operation is as follows: the support cylinder 201 is connected to a negative pressure pump via an air nozzle 202 to generate negative pressure inside the cavity. When the rotating seat 204 rotates intermittently under the drive of the motor 601, the "L"-shaped air passage 209 corresponding to the bottom of the blade positioning groove 207 will also adjust its position accordingly. Until the rotating seat 204 rotates intermittently to the welding position, the corresponding "L"-shaped air passage 209 is connected to the negative pressure interface 203 at the top side of the support cylinder 201, thereby achieving the adsorption and fixation of the blade in the corresponding blade positioning groove 207. The adsorption and fixation within the groove 207 ensures the stability of the blade during welding and improves welding quality. This application utilizes the rotation of the rotating seat 204 to achieve automatic switching of the air passage 209. Only when the rotating seat 204 rotates intermittently to the welding position does the "L"-shaped air passage 209 connect with the negative pressure interface 203 of the support cylinder 201, achieving precise adsorption and fixation of the blade at the welding position. This avoids difficulties in picking up and placing the blade caused by adsorption at non-welding positions. The negative pressure adsorption force is evenly applied to the bottom of the blade, reducing the risk of blade deformation compared to mechanical clamps, ensuring the relative position of the blade and the wheel is stable during welding, and reducing the probability of weld seam deviation. Please see Figure 6A support member 3 is fixedly installed around the top of the base 1, and the end of the support member 3 facing away from the base 1 is fixed to the mounting plate 4. A contour welding assembly 5 is installed on the side of the mounting plate 4. The contour welding assembly 5 includes a side plate 501 welded and fixed to the side of the mounting plate 4. A follower rod 502 is vertically slidably installed at the end of the side plate 501, and a roller 503 is rotatably installed at the end of the follower rod 502 through a shaft bracket. The roller 503 abuts against the contour protrusion 208 at the bottom of the outer edge of the blade positioning groove 207. The contour welding assembly 5 also includes a spring 50 sleeved on the outside of the follower rod 502. 4. The side plate 501 is elastically connected to the outer shaft of the roller 503 via the spring 504, and the extension rod 505 is radially fixed on the top side of the follower rod 502. The contour welding assembly 5 also includes connecting arms 506 fixedly installed on both sides of the end of the extension rod 505. The welding gun 507 is clamped and fixed inside the connecting arm 506, and the welding gun 507 is located at the junction of the blade positioning groove 207 and the wheel positioning core groove 205. The follower rod 502 drives the welding gun 507 to move in contour at a preset blade installation angle by the rolling of the roller 503 on the conical surface of the contour convex ridge 208. The specific operation is as follows: Similarly, when the rotating seat 204 rotates intermittently under the drive of the motor 601, the contouring convex rib 208 at the bottom of the outer edge of the blade positioning groove 207 will also rotate. When the blade is sent to the welding station with the intermittent rotation of the rotating seat 204, the roller 503 at the end of the follower rod 502 installed on the welding station side plate 501 rolls on the conical surface of the contouring convex rib 208. Through the structural design that the contouring convex rib 208 and the blade positioning groove 207 have the same taper, the welding torch 507 located at the junction of the blade positioning groove 207 and the wheel positioning core groove 205 moves in contour at the preset blade installation angle to achieve welding and fixing of the blade and the wheel. The contouring movement of the welding torch 507 is automatically achieved by the mechanical structure, without the need for manual repeated adjustment of the angle and path of the welding torch 507. It is especially suitable for batch processing of blades of multiple specifications, improving the versatility and debugging efficiency of the device. Please see Figures 4 to 5A synchronous drive assembly 6 is installed on the side of the base 1. The synchronous drive assembly 6 includes a motor 601 fixedly installed on the side of the base 1. A cam 602 is coaxially fixed to the bottom of the rotating end of the motor 601, and an eccentric pin protrudes from the side of the cam 602. The synchronous drive assembly 6 also includes a grooved wheel 603 installed on the side of the cam 602. The groove on the outer edge of the grooved wheel 603 intermittently engages with the eccentric pin at the side of the cam 602. The grooved wheel 603 is rotated and transmitted to the rotating seat 204 through a connecting bushing 604. The synchronous drive assembly 6 also includes an eccentric wheel 605 coaxially fixed to the top of the rotating end of the motor 601. A crank 606 is rotatably connected to the eccentric pin at the side of the eccentric wheel 605, and the crank 606 is away from the eccentric wheel 605. One end of the pin is rotatably connected to the slider 607. The slider 607 is slidably mounted on the guide rail 608, and the guide rail 608 is fixedly mounted on the side of the mounting plate 4. The synchronous drive assembly 6 also includes a connecting rod 609 fixedly mounted on the top of the slider 607. A push rod 610 is fixedly connected to the top of the connecting rod 609. The push rod 610 slides horizontally at the bottom of the blade magazine 611. The blade magazine 611 is supported and fixed to the side of the mounting plate 4 by an overhead bracket. The discharge end of the blade magazine 611 is located at the outer circle side of the rotating seat 204. The blade to be installed at the bottom of the blade magazine 611 falls into the blade positioning groove 207 provided on the outer circle of the rotating seat 204 under the intermittent push of the push rod 610 and fits the taper of the blade positioning groove 207 to adjust the placement angle. The specific operation is as follows: The wheel to be processed is placed inside the wheel positioning core groove 205 at the center of the rotating seat 204 by the positioning pin 206. The motor 601 is activated. On the one hand, the motor 601 drives the cam 602, which is coaxial at the bottom of the rotating end, to rotate. Then, through the intermittent engagement between the eccentric pin on the side of the cam 602 and the groove on the outer edge of the grooved wheel 603, the rotating seat 204, which is coaxially fixed on the grooved wheel 603 by the connecting bushing 604, rotates intermittently on the supporting cylinder 201. On the other hand, The motor 601 drives the coaxial eccentric wheel 605 at the top of the rotating end to rotate. Then, through the crank 606 connected to the eccentric pin on the side end of the eccentric wheel 605, the rotational motion of the eccentric wheel 605 is converted into the linear reciprocating motion of the slider 607 on the guide rail 608. Finally, through the horizontal sliding of the push rod 610 at the bottom of the blade magazine 611 groove, the blade to be installed at the bottom of the blade magazine 611 groove is pushed into the blade positioning groove 207 on the outer circle of the rotating seat 204 and fits into the taper adjustment groove 207. Regarding the placement angle, this application employs a two-pronged approach. First, the motor 601 synchronously drives the cam 602 and the grooved wheel 603 mechanism, enabling the rotating seat 204 to rotate intermittently. This ensures that the wheel accurately stops at the preset position after each rotation, providing a stable foundation for the orderly connection of processes such as blade feeding, adsorption fixing, and welding, and avoiding process chaos caused by continuous rotation. Second, the motor 601 drives the eccentric wheel 605-crank 606-slider 607 mechanism, which in turn drives the push rod 610 to automatically push the blades to be installed in the blade magazine 611 into the blade positioning groove 207 of the rotating seat 204. This eliminates the need for manual placement of blades, reducing human intervention. Simultaneously, the tapered design of the blade positioning groove 207 automatically adjusts the blade placement angle, avoiding errors from manual adjustments and improving the initial positioning accuracy of the blades. The intermittent rotation of the wheel driven by the same motor 601 and the automatic blade feeding achieve synchronous coordination of the wheel's arrival and blade feeding, reducing the response delay of individual drive mechanisms, shortening the preparation time for single blade processing, and improving overall processing efficiency.

[0021] In summary, when using the welding device for machining the turbine blades of this gas turbine: First, the wheel to be processed is positioned inside the wheel positioning core groove 205 at the center of the rotating seat 204 by the positioning pin 206. Then, the motor 601 is activated. On one hand, the motor 601 drives the cam 602, which is coaxially mounted at the bottom of the rotating end, to rotate. This, in turn, causes the eccentric pin on the side of the cam 602 to intermittently engage with the groove on the outer edge of the grooved wheel 603. Ultimately, this causes the rotating seat 204, which is coaxially fixed to the grooved wheel 603 via the connecting bushing 604, to intermittently rotate on the supporting cylinder 201. On the other hand, the motor 601... 01 drives the coaxial eccentric wheel 605 at the top of the rotating end to rotate, and then through the crank 606 connected to the eccentric pin on the side end of the eccentric wheel 605, the rotational motion of the eccentric wheel 605 is converted into the linear reciprocating motion of the slider 607 on the guide rail 608. Finally, through the horizontal sliding of the push rod 610 at the bottom of the blade magazine 611 groove, the blade to be installed at the bottom of the blade magazine 611 groove is pushed into the blade positioning groove 207 on the outer circle of the rotating seat 204 and aligned with the tapered adjustment of the blade positioning groove 207. From this perspective, on the one hand, the motor 601 synchronously drives the cam 602 and the grooved wheel 603 mechanism to make the rotating seat 204 rotate intermittently, ensuring that the wheel can accurately stop at the preset position after each rotation, providing a stable foundation for the orderly connection of blade feeding, adsorption fixing, welding and other processes, and avoiding process chaos caused by continuous rotation. On the other hand, the motor 601 drives the eccentric wheel 605-crank 606-slider 607 mechanism to drive the push rod 610 to automatically push the blade to be installed in the blade spring 611 into the blade positioning groove 207 of the rotating seat 204, eliminating the need for manual placement of blades and reducing human intervention. At the same time, the tapered design of the blade positioning groove 207 automatically adjusts the blade placement angle, avoiding errors from manual adjustment and improving the initial positioning accuracy of the blade. The intermittent rotation of the wheel driven by the same motor 601 and the automatic blade feeding realize the synchronous coordination of the wheel's arrival and blade feeding, reducing the response delay of individual drive mechanisms, shortening the preparation time for single blade processing, and improving the overall processing efficiency. Secondly, the support cylinder 201 is connected to a negative pressure pump via an air nozzle 202, creating negative pressure inside the cavity. When the rotating seat 204 rotates intermittently under the drive of the motor 601, the "L"-shaped air passage 209 corresponding to the bottom of the blade positioning groove 207 will also adjust its position accordingly. Until the rotating seat 204 rotates intermittently to the welding position, the corresponding "L"-shaped air passage 209 is connected to the negative pressure interface 203 at the top side of the support cylinder 201, thereby achieving adsorption and fixation of the blade within the corresponding blade positioning groove 207. This is achieved by fixing the blade within the corresponding blade positioning groove 207 when it is in the welding position. The adsorption and fixation within 07 ensures the stability of the blade during welding and improves welding quality. This application utilizes the rotation of the rotating seat 204 to achieve automatic switching of the air passage 209. Only when the rotating seat 204 rotates intermittently to the welding position does the "L"-shaped air passage 209 connect with the negative pressure interface 203 of the support cylinder 201, achieving precise adsorption and fixation of the blade at the welding position. This avoids difficulties in picking up and placing the blade caused by adsorption at non-welding positions. The negative pressure adsorption force is evenly applied to the bottom of the blade, reducing the risk of blade deformation compared to mechanical clamps, ensuring the relative position of the blade and the wheel is stable during welding, and reducing the probability of weld seam deviation. Finally, similarly, when the rotating seat 204 rotates intermittently under the drive of the motor 601, the contouring ridge 208 at the bottom of the outer edge of the blade positioning groove 207 will also rotate. When the blade is sent to the welding station with the intermittent rotation of the rotating seat 204, the roller 503 at the end of the follower rod 502 installed on the welding station side plate 501 rolls on the conical surface of the contouring ridge 208. Through the structural design that the contouring ridge 208 and the blade positioning groove 207 have the same taper, the welding torch 507 located at the junction of the blade positioning groove 207 and the wheel positioning core groove 205 moves in contour at the preset blade installation angle, thereby achieving welding and fixing at the junction of the blade and the wheel. The contouring movement of the welding torch 507 is automatically achieved by the mechanical structure, without the need for manual repeated adjustment of the angle and path of the welding torch 507. It is especially suitable for batch processing of blades of various specifications, improving the versatility and debugging efficiency of the device.

[0022] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the existence of an infinite number of specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A welding device for machining turbine blades of a gas turbine, comprising a base (1) and a welding positioning fixture (2), characterized in that, A welding positioning fixture (2) is installed on the base (1). The welding positioning fixture (2) includes a support cylinder (201) fixedly installed on the base (1). The bottom side of the support cylinder (201) is connected to an air nozzle (202), and the top side of the support cylinder (201) is provided with a negative pressure port (203). A rotating seat (204) is rotatably installed on the top of the support cylinder (201), and a wheel positioning core groove (205) is recessed in the middle of the rotating seat (204). A positioning column (206) is fixedly installed in the middle of the bottom of the wheel positioning core groove (205), and the wheel to be processed is positioned by the positioning column (206). Inside the wheel positioning core groove (205), the rotating seat (204) has concentric arrays of blade positioning grooves (207) around its disk surface. The taper of the blade positioning grooves (207) matches the blade's designed installation angle. A contoured convex ridge (208) is correspondingly provided at the bottom of the outer edge of the blade positioning grooves (207), and the contoured convex ridge (208) has the same taper as the blade positioning grooves (207). Each blade positioning groove (207) has a corresponding air passage (209) at its bottom, and the air passage (209) has an "L" shaped cross-section. Support members (3) are fixedly installed around the top of the base (1), and the support members (3) are backed by One end of the base (1) is fixed to the mounting plate (4). A contour welding assembly (5) is installed on the side of the mounting plate (4). The contour welding assembly (5) includes a side plate (501) welded and fixed to the side of the mounting plate (4). A follower rod (502) is vertically slidably installed at the end of the side plate (501). A roller (503) is rotatably installed at the end of the follower rod (502) through a shaft frame. The roller (503) abuts against the contour protrusion (208) at the bottom of the outer edge of the blade positioning groove (207). The contour welding assembly (5) also includes a spring (504) sleeved on the outside of the follower rod (502). The side plate (501) is connected to the mounting plate (4). The spring (504) is elastically connected to the outer shaft of the roller (503), and the extension rod (505) is radially fixed on the side of the top end of the follower rod (502). The contour welding assembly (5) also includes connecting arms (506) fixedly installed on both sides of the end of the extension rod (505). The welding gun (507) is clamped and fixed inside the connecting arm (506), and the welding gun (507) is located at the junction of the blade positioning groove (207) and the wheel positioning core groove (205). The follower rod (502) drives the welding gun (507) to move in contour at a preset blade installation angle by the rolling of the roller (503) on the conical surface of the contour convex ridge (208).

2. The welding device for machining gas turbine blades according to claim 1, characterized in that, The support cylinder (201) is connected to the negative pressure pump through the air nozzle (202) to generate negative pressure inside the cavity. When the rotating seat (204) is in the preset position, the "L"-shaped air passage (209) at the corresponding position is connected to the negative pressure interface (203) at the top side of the support cylinder (201) to achieve adsorption and fixation of the blade in the corresponding blade positioning groove (207).

3. The welding device for machining gas turbine blades according to claim 1, characterized in that, The base (1) is equipped with a synchronous drive assembly (6) on its side. The synchronous drive assembly (6) includes a motor (601) fixedly installed on the side of the base (1). The bottom of the rotating end of the motor (601) is coaxially fixed with a cam (602), and the side of the cam (602) has an eccentric pin protruding from its disk surface.

4. The welding device for machining gas turbine blades according to claim 3, characterized in that, The synchronous drive assembly (6) also includes a groove wheel (603) mounted on the side of the cam (602). The groove on the outer edge of the groove wheel (603) intermittently engages with the eccentric pin on the side of the cam (602) disk surface, and the groove wheel (603) is rotated through a connecting bushing (604) and a rotating seat (204).

5. The welding device for machining gas turbine blades according to claim 3, characterized in that, The synchronous drive assembly (6) also includes an eccentric wheel (605) coaxially fixed to the top of the rotating end of the motor (601). The eccentric pin on the side of the eccentric wheel (605) is rotatably connected to a crank (606), and the end of the crank (606) away from the pin on the eccentric wheel (605) is rotatably connected to a slider (607). The slider (607) is slidably mounted on a guide rail (608), and the guide rail (608) is fixedly mounted on the side of the mounting plate (4).

6. The welding device for machining gas turbine blades according to claim 5, characterized in that, The synchronous drive assembly (6) also includes a connecting rod (609) fixedly installed on the top of the slider (607). A push rod (610) is fixedly connected to the top of the connecting rod (609), and the push rod (610) slides horizontally at the bottom of the blade magazine (611). The blade magazine (611) is supported and fixed to the side of the mounting plate (4) by an overhead bracket. The discharge end of the blade magazine (611) is located at the outer circle side of the rotating seat (204). The blade to be installed at the bottom of the blade magazine (611) falls into the blade positioning groove (207) set on the outer circle of the rotating seat (204) under the intermittent push of the push rod (610) and fits the blade positioning groove (207) to adjust the placement angle.

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