Welding device and method for steam turbine blade production

Abstract

The invention relates to the technical field of blade welding device production, in particular to a welding device for steam turbine blade production and a method thereof.The welding device comprises a bottom plate, two sets of supporting plates are fixedly connected to the upper end of the bottom plate, a first clamping mechanism is arranged between the two sets of supporting plates, and an impeller of a blade to be welded is clamped through the first clamping mechanism; the upper ends of the two supporting plates are fixedly connected to the lower end of a connecting box, a conveying mechanism is movably connected into the connecting box, and a plurality of second clamping mechanisms are fixedly connected to the outer side of the conveying mechanism. A plurality of sets of blades are sequentially inserted into a second clamping mechanism, so that an operator pushes a first T-shaped rod to enable a push plate to push the blades into a connecting cavity, finally the blades slide into a positioning pipe and fall above an impeller, and then the push plate is controlled again to push new blades into the connecting cavity. Welding personnel do not need to continuously align and adjust the welding positions between the blades and the impeller, and the welding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of blade welding devices, in particular to a welding device and a method for producing steam turbine blades. Background Art

[0002] Steam turbine blades are the key parts of steam turbines and one of the most delicate and important parts. They are subjected to high temperature, high pressure, huge centrifugal force, steam force, steam excitation force, corrosion and vibration, as well as water droplet erosion in the wet steam zone under extremely harsh conditions. Their aerodynamic performance, processing geometry, surface roughness, installation clearance, operating conditions, scaling and other factors all affect the efficiency and output of the steam turbine. Their structural design, vibration intensity and operating mode have a decisive influence on the safety and reliability of the unit.

[0003] For example, the Chinese patent with announcement number CN212526674U discloses a welding device for producing turbine blades, including a base, a first stand fixedly installed on the top of the base, two second stands fixedly installed on the top of the base and located on the left side of the first stand, a matching groove is provided on the top of the first stand, a connecting piece is movably installed on the opposite side of the two second stands, a transmission arm is fixedly installed on the left side of the connecting piece, and a hydraulic rod is movably installed on the top of the base, which is located on the opposite side of the two second stands and the top is movably connected to the left end of the transmission arm.

[0004] However, the above scheme has the following shortcomings: in the above patent, the left end of the transmission arm is pulled downward by the hydraulic rod, so that the rotating rod rotates vertically, and the impeller is inserted from the top of the rotating rod, and the right end of the rotating rod is pushed by the hydraulic rod to re-enter the interior of the matching groove, and the positioning ring is rotated to position the impeller on the rotating rod, so that the blades can be welded to the outside of the impeller through the machine body and the welding gun. However, during the operation, due to the large number of blades and the lack of a mechanism for auxiliary clamping and alignment of the blades in the above patent, during the welding process, the welder needs to constantly align and adjust the welding position between the blade and the impeller, so that the blade is finally welded to the impeller, which is more troublesome to operate. For this reason, we have introduced a welding device and method for producing steam turbine blades. Summary of the invention

[0005] The object of the present invention is to provide a welding device and method for producing steam turbine blades to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A welding device for producing steam turbine blades, comprising a bottom plate, two groups of support plates are fixedly connected to the upper end of the bottom plate, a first clamping mechanism is arranged between the two groups of support plates, an impeller with blades to be welded is clamped by the first clamping mechanism, the upper ends of the two groups of support plates are fixedly connected to the lower end of a connection box, a transmission mechanism is movably connected in the connection box, a plurality of groups of second clamping mechanisms are fixedly connected to the outer side of the transmission mechanism, the blades are clamped by the second clamping mechanism, and the second clamping mechanism is driven to move by the transmission mechanism; A push plate is provided at the lower side of the transmission mechanism, one side of the push plate is fixedly connected to two groups of T-shaped connecting rods, the T-shaped connecting rods are movably connected in the connection box, one end of the T-shaped connecting rod away from the push plate extends into the support box and is fixedly connected to the slide plate, the slide plate is slidably connected in the support box, the support box is fixedly connected to the connection box, one end of the slide plate away from the T-shaped connecting rod is fixedly connected to a first T-shaped rod, and one end of the first T-shaped rod away from the slide plate penetrates the support box and extends into the external environment; A positioning tube is provided on the upper side of the first clamping mechanism, and the positioning tube is fixedly connected to the lower end of the connection box. The upper end of the positioning tube is connected to a connection cavity, and the connection cavity is opened in the connection box and is connected to the inner side of the connection box. The position of the push plate corresponds to the position of the connection cavity.

[0007] Preferably, the first clamping mechanism includes a first clamping rod and a second clamping rod, the first clamping rod having one end away from the second clamping rod fixedly connected to the output end of the telescopic cylinder, the telescopic cylinder is fixedly installed in the right support plate, the second clamping rod having one end away from the first clamping rod fixedly connected to the output end of the first motor, and the first motor is fixedly installed in the left support plate.

[0008] Preferably, a square rod is fixedly connected to one end of the first clamping rod close to the second clamping rod, a square groove is formed in one end of the second clamping rod close to the first clamping rod, and the square rod is clamped in the square groove.

[0009] Preferably, the transmission mechanism has two groups of transmission rollers, both ends of the transmission rollers are movably connected in a connecting box, transmission tracks are sleeved on the outer sides of the two groups of transmission rollers, a second motor is fixedly connected to one side of the connecting box, and the output end of the second motor is fixedly connected to a group of transmission rollers.

[0010] Preferably, the second clamping mechanism includes a rubber block, the rubber block is fixedly connected to the outer side of the transmission track, the end of the rubber block away from the transmission track is fixedly connected to the U-shaped block, and two groups of clamping plates are movably connected to the inner side of the U-shaped block, and the opposing surfaces of the two groups of clamping plates are arranged in an inclined shape, and the inclination angle of the opposing surfaces of the two groups of clamping plates is equal to the inclination angle of the blades.

[0011] Preferably, the two groups of clamping plates are fixedly connected to the back sides thereof with two groups of second T-shaped rods, and one end of the second T-shaped rod away from the clamping plate is slidably connected in a sliding cavity, and the sliding cavity is opened in the U-shaped block. A connecting spring is fixedly connected in the sliding cavity, and the other end of the connecting spring is fixedly connected to the second T-shaped rod, and the upper ends of the two groups of clamping plates are arranged in an arc shape.

[0012] Preferably, a return spring is sleeved on the outer side of the T-shaped connecting rod, one end of the return spring is fixedly connected to the support box, and the other end is fixedly connected to the slide. A push switch is provided on the side of the slide away from the T-shaped connecting rod, and the push switch is fixedly connected in the support box. An induction switch is provided on the lower side of the push plate, and the induction switch is fixedly connected to the inner side of the connecting box. A through groove is opened in the upper end of the connecting box.

[0013] In addition, in order to achieve the above-mentioned object, the present invention also provides a welding method, which is used in the above-mentioned welding device for producing steam turbine blades, comprising: S1. Sleeve the impeller on the outside of the second clamping rod, open the telescopic cylinder to drive the first clamping rod to clamp the impeller, turn on the second motor to drive the transmission roller to rotate and drive the transmission crawler to rotate, when the U-shaped block moves to the lower side of the through groove, insert the blade between the two groups of clamping plates, push the first T-shaped rod to drive the slide plate to move, the movement of the slide plate drives the movement of the two groups of T-shaped connecting rods, the movement of the two groups of T-shaped connecting rods drives the push plate to move, and the moving push plate pushes the blade into the connecting cavity; S2. The blades entering the connecting cavity fall into the upper end of the impeller through the positioning tube. The operator welds the blades to the upper end of the impeller with a welding gun. After the push plate pushes a group of blades into the connecting cavity, the slide plate will cancel the pressing of the push switch. When the pushing is completed, the slide plate will return to its original position under the elastic force of the reset spring and press the push switch again, so that the second motor rotates. When another group of blades moves to the position of the induction switch, the induction switch will control the second motor to stop rotating. S3. Turn on the first motor to drive the second clamping rod to rotate, so that the other welding position of the impeller moves to the lower end of the positioning tube, and push the first T-rod again to make the push plate push the blades into the connecting cavity. Under the elastic force of the reset spring, the first T-rod will move to its original position. When all the blades are welded to the impeller, reopen the telescopic cylinder to drive the first clamping rod connected to its output end to move outward to remove the impeller with welded blades.

[0014] Compared with the prior art, the beneficial effect of the present invention is that by inserting several groups of blades into the second clamping mechanism in sequence, the operator can push the first T-bar to make the push plate push the blades into the connecting cavity, and finally slide into the positioning tube and fall above the impeller. At the same time, when the push plate returns to its original position, another group of blades will move back to the position of the push plate. After the welding of the previous group of blades is completed, the push plate can be controlled again to push the new blades into the connecting cavity. There is no need for the welder to constantly align and adjust the welding position between the blades and the impeller, thereby improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the side section structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the connection relationship between the second clamping mechanism and the blade of the present invention; Figure 3 This is a schematic cross-sectional view of the impeller of the present invention in a clamped state; Figure 4 It is a cross-sectional structural schematic diagram of the connection relationship between the second clamping mechanism and the blade of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the connection relationship between the clamping plate and the blade of the present invention; Figure 6 It is a schematic diagram of the main structure of the present invention.

[0016] In the figure: 1, bottom plate; 2, support plate; 3, first clamping rod; 4, second clamping rod; 5, telescopic cylinder; 6, square rod; 7, square groove; 8, first motor; 9, impeller; 10, blade; 11, connection box; 12, U-shaped block; 13, transmission roller; 14, induction switch; 15, through groove; 16, transmission crawler; 17, positioning tube; 18, connection cavity; 19, first T-shaped rod; 20, T-shaped connecting rod; 21, reset spring; 22, slide plate; 23, push switch; 24, support box; 25, push plate; 26, second motor; 27, clamping plate; 28, sliding cavity; 29, second T-shaped rod; 30, connection spring; 31, rubber block. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-6 , the present invention provides a technical solution: Embodiment 1:

[0019] A welding device for producing steam turbine blades, comprising a bottom plate 1, two groups of support plates 2 are fixedly connected to the upper end of the bottom plate 1, a first clamping mechanism is arranged between the two groups of support plates 2, the first clamping mechanism comprises a first clamping rod 3 and a second clamping rod 4, an end of the first clamping rod 3 away from the second clamping rod 4 is fixedly connected to the output end of a telescopic cylinder 5, the telescopic cylinder 5 is fixedly installed in the right side support plate 2, an end of the second clamping rod 4 away from the first clamping rod 3 is fixedly connected to the output end of a first motor 8, the first motor 8 is fixedly installed on the left side support plate 2 In the first clamping rod 3, one end close to the second clamping rod 4 is fixedly connected with a square rod 6, and the second clamping rod 4 is provided with a square groove 7 in one end close to the first clamping rod 3. The square rod 6 is clamped in the square groove 7, and the impeller 9 is sleeved on the outside of the second clamping rod 4. After the sleeve connection is completed, the telescopic cylinder 5 is opened to drive the first clamping rod 3 connected to its output end. The first clamping rod 3 moves to drive the square rod 6 connected thereto to start moving. When the square rod 6 is inserted into the square groove 7, the impeller 9 is clamped between the first clamping rod 3 and the second clamping rod 4. The upper ends of the two groups of support plates 2 are fixedly connected to the lower ends of the connection box 11, and a transmission mechanism is movably connected in the connection box 11. Several groups of second clamping mechanisms are fixedly connected to the outside of the transmission mechanism. The blade 10 is clamped by the second clamping mechanism, and the second clamping mechanism is driven to move by the transmission mechanism. A push plate 25 is provided on the lower side of the transmission mechanism. One side of the push plate 25 is fixedly connected to the two groups of T-shaped connecting rods 20. The T-shaped connecting rod 20 is movably connected in the connection box 11. The end of the T-shaped connecting rod 20 away from the push plate 25 extends into the support box 24 and is fixedly connected to the slide plate 22. The slide plate 22 is slidably connected in the support box 24. The support box 24 is fixedly connected to the connection box 11. The slide plate 22 is away from the T One end of the T-shaped connecting rod 20 is fixedly connected to the first T-shaped rod 19, and the end of the first T-shaped rod 19 away from the slide 22 penetrates the support box 24 and extends into the external environment. The slide 22 connected to it is driven to move by pushing the first T-shaped rod 19, and the movement of the slide 22 drives the two groups of T-shaped connecting rods 20 to move, and the movement of the two groups of T-shaped connecting rods 20 drives the push plate 25 to move. At this time, the moving push plate 25 pushes the blade 10 corresponding to its position into the connecting cavity 18; A positioning tube 17 is provided on the upper side of the first clamping mechanism, and the positioning tube 17 is fixedly connected to the lower end of the connecting box 11. The upper end of the positioning tube 17 is communicated with the connecting chamber 18. The connecting chamber 18 is opened in the connecting box 11, and the connecting chamber 18 is communicated with the inner side of the connecting box 11. The position of the push plate 25 corresponds to the position of the connecting chamber 18. Since the lower end of the positioning tube 17 corresponds to the central axis position of the impeller 9, the operator does not need to match the position after welding is completed. At the same time, an opening is provided on one side of the positioning tube 17, so that the blades 10 welded to the impeller 9 can move with the impeller 9. Embodiment 2:

[0020] On the basis of Example 1, in order to enable the impeller 9 to be fixedly arranged between the two groups of support plates 2, the first clamping mechanism includes a first clamping rod 3 and a second clamping rod 4, the first clamping rod 3 is fixedly connected to the output end of the telescopic cylinder 5 at one end away from the second clamping rod 4, the telescopic cylinder 5 is fixedly installed in the right support plate 2, the second clamping rod 4 is fixedly connected to the output end of the first motor 8 at one end away from the first clamping rod 3, the first motor 8 is fixedly installed in the left support plate 2, the first clamping rod 3 is fixedly connected to the end of the second clamping rod 4 close to the second clamping rod 4 with a square rod 6, the second clamping rod 4 is provided with a square groove 7 in the end close to the first clamping rod 3, the square rod 6 is clamped in the square groove 7, the impeller 9 is sleeved on the outside of the second clamping rod 4, after the sleeve is completed, the telescopic cylinder 5 is opened to drive the first clamping rod 3 connected to its output end, the first clamping rod 3 moves and drives the square rod 6 connected to it to start moving, when the square rod 6 is inserted into the square groove 7, the impeller 9 is clamped between the first clamping rod 3 and the second clamping rod 4; The transmission mechanism has two groups of transmission rollers 13, both ends of the transmission rollers 13 are movably connected to the connection box 11, and the outer sides of the two groups of transmission rollers 13 are sleeved with transmission crawlers 16. A second motor 26 is fixedly connected to one side of the connection box 11, and the output end of the second motor 26 is fixedly connected to a group of transmission rollers 13. By turning on the second motor 26 to drive the transmission rollers 13 connected to its output end to rotate, the transmission crawler 16 can be driven to start rotating. The rotation of the transmission crawler 16 drives the several groups of U-shaped blocks 12 connected thereto to start rotating, and the second The clamping mechanism includes a rubber block 31, which is fixedly connected to the outside of the transmission crawler 16. The end of the rubber block 31 away from the transmission crawler 16 is fixedly connected to the U-shaped block 12. When the rubber block 31 moves to the bending position of the transmission crawler 16, the rubber block 31 will change according to the bending shape of the transmission crawler 16. Two groups of clamping plates 27 are movably connected to the inside of the U-shaped block 12. The opposite surfaces of the two groups of clamping plates 27 are arranged in an inclined shape, and the inclination angle of the opposite surfaces of the two groups of clamping plates 27 is equal to the inclination angle of the blade. The back surfaces of the two groups of clamping plates 27 are fixedly connected with two groups of second T-shaped rods 29. The end of the second T-shaped rod 29 away from the clamping plate 27 is slidably connected to the sliding cavity 28. The sliding cavity 28 is opened in the U-shaped block 12. A connecting spring 30 is fixedly connected in the sliding cavity 28. The other end of the connecting spring 30 is fixedly connected to the second T-shaped rod 29. The upper ends of the two groups of clamping plates 27 are arranged in an arc shape. When the U-shaped block 12 moves to the lower side of the through groove 15, the blade 10 can be inserted between the two groups of clamping plates 27. Since the upper end of the clamping plate 27 is arranged in an arc shape, when the blade 10 contacts the two sets of clamping plates 27, the clamping plates 27 will be pushed to move outwards, and the clamping plates 27 move along the sliding cavity 28 with the second T-shaped rod 29 connected thereto, and the connecting spring 30 is compressed by the clamping plate 27. When the blade 10 is fully inserted between the two sets of clamping plates 27, the blade 10 will be clamped between the two sets of clamping plates 27 under the elastic force of the connecting spring 30; A return spring 21 is sleeved on the outside of the T-shaped connecting rod 20, one end of the return spring 21 is fixedly connected to the support box 24, and the other end is fixedly connected to the slide plate 22. A push switch 23 is provided on the side of the slide plate 22 away from the T-shaped connecting rod 20. The push switch 23 can be of a suitable size and model in actual use. The push switch 23 is fixedly connected to the support box 24, and an induction switch 14 is provided on the lower side of the push plate 25. After the push plate 25 pushes a group of blades 10 into the connecting cavity 18, the slide plate 22 will cancel the pressing of the press switch 23. When the pushing is completed, under the elastic force of the return spring 21, the slide plate 22 will return to its original position and press the press switch 23 again. At this time, the second motor 26 will rotate, and when the other group of blades 10 moves to the position of the sensor switch 14, the output end of the sensor switch 14 detects that there is an object blocking it. At this time, the sensor switch 14 will control the second motor 26 to stop rotating. The specific model of the sensor switch 14 is the BILN1-GM8-P1 inductive proximity switch produced by Yueqing Binxuan Electric Co., Ltd. The sensor switch 14 is fixedly connected to the inner side of the connection box 11. A through groove 15 is provided in the upper end of the connection box 11. The operator can push the first T-bar 19 to make the push plate 25 push the blades 10 into the connection cavity 18. Under the elastic force of the reset spring 21, the first T-bar 19 will move to its original position.

[0021] In addition, in order to achieve the above-mentioned object, the present invention also provides a welding method for the above-mentioned welding device for producing steam turbine blades, comprising: S1. Sleeve the impeller 9 on the outside of the second clamping rod 4, open the telescopic cylinder 5 to drive the first clamping rod 3 to clamp the impeller 9, turn on the second motor 26 to drive the transmission roller 13 to rotate and drive the transmission crawler 16 to rotate, when the U-shaped block 12 moves to the lower side of the through slot 15, insert the blade 10 between the two groups of clamping plates 27, push the first T-shaped rod 19 to drive the slide plate 22 to move, the movement of the slide plate 22 drives the two groups of T-shaped connecting rods 20 to move, the movement of the two groups of T-shaped connecting rods 20 drives the push plate 25 to move, and the moving push plate 25 pushes the blade 10 into the connecting cavity 18; S2. The blades 10 entering the connection chamber 18 fall into the upper end of the impeller 9 through the positioning tube 17. The operator welds the blades 10 to the upper end of the impeller 9 with a welding gun. After the push plate 25 pushes a group of blades 10 into the connection chamber 18, the slide plate 22 cancels the pressing of the push switch 23. When the pushing is completed, under the elastic force of the return spring 21, the slide plate 22 returns to its original position and presses the push switch 23 again, so that the second motor 26 rotates. When another group of blades 10 moves to the position of the induction switch 14, the induction switch 14 controls the second motor 26 to stop rotating. S3. Turn on the first motor 8 to drive the second clamping rod 4 to rotate, so that the other welding position of the impeller 9 moves to the lower end of the positioning tube 17. Push the first T-bar 19 again to make the push plate 25 push the blade 10 into the connecting cavity 18. Under the elastic force of the reset spring 21, the first T-bar 19 will move to its original position. When all the blades 10 are welded to the impeller 9, reopen the telescopic cylinder 5 to drive the first clamping rod 3 connected to its output end to move outward to remove the impeller 9 welded with the blades 10.

[0022] Working principle: when in use, the impeller 9 is sleeved on the outside of the second clamping rod 4. After the sleeve connection is completed, the telescopic cylinder 5 is opened to drive the first clamping rod 3 connected to its output end. The first clamping rod 3 moves to drive the square rod 6 connected to it to start moving. When the square rod 6 is inserted into the square groove 7, the impeller 9 is clamped between the first clamping rod 3 and the second clamping rod 4. By turning on the second motor 26 to drive the transmission roller 13 connected to its output end to rotate, the transmission crawler 16 can be driven to start rotating. The transmission crawler 16 rotates to drive the several groups of U-shaped blocks 12 connected to it to start rotating. When the U-shaped blocks 1 When the blade 10 moves to the lower side of the through slot 15, the blade 10 can be inserted between the two groups of clamping plates 27. Since the upper ends of the clamping plates 27 are arranged in an arc shape, when the blade 10 contacts the two groups of clamping plates 27, the clamping plates 27 are pushed to move outward. When the clamping plates 27 move, the second T-shaped rod 29 connected thereto moves along the sliding cavity 28. At this time, the connecting spring 30 is compressed by the clamping plate 27. When the blade 10 is fully inserted between the two groups of clamping plates 27, the blade 10 is clamped between the two groups of clamping plates 27 under the elastic force of the connecting spring 30. The first T-shaped rod 19 is pushed to drive the slide plate 22 connected thereto to move, and the movement of the slide plate 22 drives the two groups of T-shaped connecting rods 20 to move, and the movement of the two groups of T-shaped connecting rods 20 drives the push plate 25 to move. At this time, the moving push plate 25 pushes the blade 10 corresponding to its position into the connecting cavity 18, and the blade 10 entering the connecting cavity 18 then falls into the upper end of the clamped impeller 9 through the positioning tube 17. At this time, the operator can weld the blade 10 to the upper end of the impeller 9 through the welding gun. Since the lower end of the positioning tube 17 corresponds to the central axis position of the impeller 9, the operator does not need to make position correspondence after welding is completed. At the same time, after the push plate 25 pushes a group of blades 10 into the connecting cavity 18, the slide plate 22 will cancel the pressing of the push switch 23. When the pushing is completed, under the elastic force of the return spring 21, the slide plate 22 will return to its original position and press the push switch 23 again. At this time, the second motor 26 will rotate, and when another group of blades 10 moves to the position of the sensor switch 14, the output end of the sensor switch 14 detects that there is an object blocking it. At this time, the sensor switch 14 will control the second motor 26 to stop rotating, and turn on the first motor 8 to drive its output The second clamping rod 4 connected to the output end is rotated to move the other welding position of the impeller 9 to the lower end of the positioning tube 17. At this time, the operator can push the first T-bar 19 again to make the push plate 25 push the blade 10 into the connecting cavity 18. Under the elastic force of the reset spring 21, the first T-bar 19 will move to its original position. When all the blades 10 are welded to the impeller 9, the impeller 9 with the blades 10 welded thereto can be removed by reopening the telescopic cylinder 5 to drive the first clamping rod 3 connected to its output end to move outward.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for producing steam turbine blades, comprising a base plate, characterized in that: The upper end of the bottom plate is fixedly connected with two groups of support plates, a first clamping mechanism is provided between the two groups of support plates, and the impeller with the blades to be welded is clamped by the first clamping mechanism, the upper ends of the two groups of support plates are fixedly connected to the lower end of the connection box, a transmission mechanism is movably connected in the connection box, and a plurality of groups of second clamping mechanisms are fixedly connected to the outer side of the transmission mechanism, the blades are clamped by the second clamping mechanism, and the second clamping mechanism is driven to move by the transmission mechanism; A push plate is provided at the lower side of the transmission mechanism, one side of the push plate is fixedly connected to two groups of T-shaped connecting rods, the T-shaped connecting rods are movably connected in the connection box, one end of the T-shaped connecting rod away from the push plate extends into the support box and is fixedly connected to the slide plate, the slide plate is slidably connected in the support box, the support box is fixedly connected to the connection box, one end of the slide plate away from the T-shaped connecting rod is fixedly connected to a first T-shaped rod, and one end of the first T-shaped rod away from the slide plate penetrates the support box and extends into the external environment; A positioning tube is provided on the upper side of the first clamping mechanism, and the positioning tube is fixedly connected to the lower end of the connection box. The upper end of the positioning tube is connected to a connection cavity, and the connection cavity is opened in the connection box and is connected to the inner side of the connection box. The position of the push plate corresponds to the position of the connection cavity.

2. A welding device for producing steam turbine blades according to claim 1, characterized in that: The first clamping mechanism includes a first clamping rod and a second clamping rod, wherein one end of the first clamping rod away from the second clamping rod is fixedly connected to the output end of the telescopic cylinder, and the telescopic cylinder is fixedly installed in the right support plate, and one end of the second clamping rod away from the first clamping rod is fixedly connected to the output end of the first motor, and the first motor is fixedly installed in the left support plate.

3. A welding device for producing steam turbine blades according to claim 2, characterized in that: One end of the first clamping rod close to the second clamping rod is fixedly connected with a square rod, and one end of the second clamping rod close to the first clamping rod is provided with a square groove, and the square rod is clamped in the square groove.

4. A welding device for producing steam turbine blades according to claim 1, characterized in that: The transmission mechanism comprises two groups of transmission rollers, both ends of which are movably connected in a connection box, transmission tracks are sleeved on the outer sides of the two groups of transmission rollers, a second motor is fixedly connected to one side of the connection box, and an output end of the second motor is fixedly connected to a group of transmission rollers.

5. A welding device for producing steam turbine blades according to claim 4, characterized in that: The second clamping mechanism includes a rubber block, which is fixedly connected to the outer side of the transmission track. The end of the rubber block away from the transmission track is fixedly connected to the U-shaped block. Two groups of clamping plates are movably connected to the inner side of the U-shaped block. The opposing surfaces of the two groups of clamping plates are arranged in an inclined shape, and the inclination angle of the opposing surfaces of the two groups of clamping plates is equal to the inclination angle of the blades.

6. A welding device for producing steam turbine blades according to claim 5, characterized in that: Two groups of second T-shaped rods are fixedly connected to the back sides of the two groups of clamping plates. The second T-shaped rods are slidably connected in the sliding cavity at one end away from the clamping plate. The sliding cavity is opened in the U-shaped block. A connecting spring is fixedly connected in the sliding cavity. The other end of the connecting spring is fixedly connected to the second T-shaped rod. The upper ends of the two groups of clamping plates are arranged in an arc shape.

7. A welding device for producing steam turbine blades according to claim 1, characterized in that: A return spring is sleeved on the outer side of the T-shaped connecting rod, one end of the return spring is fixedly connected to the support box, and the other end is fixedly connected to the slide. A push switch is provided on the side of the slide away from the T-shaped connecting rod, and the push switch is fixedly connected to the support box. An induction switch is provided on the lower side of the push plate, and the induction switch is fixedly connected to the inner side of the connection box. A through groove is opened in the upper end of the connection box.

8. A welding method, used in the welding device for producing steam turbine blades according to any one of claims 1 to 7, characterized in that: include: S1. Sleeve the impeller on the outside of the second clamping rod, open the telescopic cylinder to drive the first clamping rod to clamp the impeller, turn on the second motor to drive the transmission roller to rotate and drive the transmission crawler to rotate, when the U-shaped block moves to the lower side of the through groove, insert the blade between the two groups of clamping plates, push the first T-shaped rod to drive the slide plate to move, the movement of the slide plate drives the movement of the two groups of T-shaped connecting rods, the movement of the two groups of T-shaped connecting rods drives the push plate to move, and the moving push plate pushes the blade into the connecting cavity; S2. The blades entering the connecting cavity fall into the upper end of the impeller through the positioning tube. The operator welds the blades to the upper end of the impeller with a welding gun. After the push plate pushes a group of blades into the connecting cavity, the slide plate will cancel the pressing of the push switch. When the pushing is completed, the slide plate will return to its original position under the elastic force of the reset spring and press the push switch again, so that the second motor rotates. When another group of blades moves to the position of the induction switch, the induction switch will control the second motor to stop rotating. S3. Turn on the first motor to drive the second clamping rod to rotate, so that the other welding position of the impeller moves to the lower end of the positioning tube, and push the first T-rod again to make the push plate push the blades into the connecting cavity. Under the elastic force of the reset spring, the first T-rod will move to its original position. When all the blades are welded to the impeller, reopen the telescopic cylinder to drive the first clamping rod connected to its output end to move outward to remove the impeller with welded blades.

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