CN111331300A

CN111331300A - Robot welding device for steam turbine blade cascade

Info

Publication number: CN111331300A
Application number: CN201911201957.1A
Authority: CN
Inventors: 钟如健; 李国平; 黄维坤; 李康恩
Original assignee: Guangzhou Ruisong Intelligent Technology Co ltd
Current assignee: Guangzhou Ruisong Intelligent Technology Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-06-26

Abstract

The invention discloses a robot welding device for a turbine blade cascade, which comprises a base, a transmission mechanism, a conductive brush assembly, a supporting disc assembly, a press-fitting assembly and a welding mechanical arm with high-pressure sensing positioning, wherein the transmission mechanism is arranged in an inner cavity of the base and outputs power on the front machining side face of the base, the supporting disc assembly and the press-fitting assembly are vertically and drivingly connected and arranged at the output end of the transmission mechanism, a workpiece to be machined is adjustably clamped and positioned between the supporting disc assembly and the press-fitting assembly, and the welding mechanical arm is opposite to the press-fitting assembly. The device fixes the blade cascade to be welded and can axially rotate to be used for robot welding of the turbine blade cascade, the efficiency is improved, the device is provided with positioning scales, the rapid and accurate positioning is facilitated, the position error of a workpiece assembly is offset, and the welding accuracy is improved.

Description

Robot welding device for steam turbine blade cascade

Technical Field

The invention relates to a turbine welding technology, in particular to a robot welding device for a turbine blade cascade.

Background

The existing turbine blade cascade welding is manual handheld welding gun welding, the blade price is high due to different blade cascade shapes, the welding effect highly depends on the proficiency of workers, in addition, the labor intensity of the workers is high due to large welding quantity of the blade cascade, and a clamping tool for welding the blade cascade does not have a corresponding tool which can realize clamping and can enable the blade cascade to rotate along the axis.

If the device is adopted to fix the blade cascade and can axially rotate, the automatic welding of the robot can be realized, the labor intensity of workers is reduced, and the welding stability is improved.

Disclosure of Invention

In order to overcome the disadvantages of the prior art, the present invention provides a robotic welding device for steam turbine blade cascades that solves the above-mentioned related problems.

The design purpose is as follows: for solving steam turbine blade cascade welding process for manual welding, intensity of labour's problem at present, provide a device fixed blade cascade and can the axial rotation be used for the robot welding of steam turbine blade cascade now, raise the efficiency, the robot is furnished with high pressure sensing technology in addition and can find the accurate position of work piece through seeking the position, offsets the dress position error of work piece, improves the welding accuracy.

The purpose of the invention is realized by adopting the following technical scheme:

the utility model provides a welding set of robot for steam turbine blade cascade, includes base, drive mechanism, electrically conductive brush subassembly, supporting disk subassembly, pressure equipment subassembly and takes high pressure sensing location's welding arm, drive mechanism installs in the inner chamber of base, and output power on the preceding processing side of base, the supporting disk subassembly is in with the vertical transmission connection dress of pressure equipment subassembly drive mechanism's output, by supporting disk subassembly and pressure equipment subassembly will wait to process work piece adjustable clamping location between the two, the welding arm is just right the pressure equipment subassembly sets up.

Preferably, the transmission mechanism comprises a motor, a mounting seat, a transmission shaft, a speed reducer, a mounting block, a gear, a slewing bearing and a connecting plate, and the mounting seat is in threaded connection with a support in an inner cavity of the base through the mounting block at the bottom; the output end of the motor is screwed on the back of the mounting seat, and a transmission shaft is arranged at the shaft end of the motor; the speed reducer is screwed on the front surface of the mounting seat and transmits power through the transmission shaft; the gear is in threaded connection with the front face of the speed reducer, the slewing bearing is installed in the inner cavity of the base and is in transmission connection with the gear to complete power transmission, and the slewing bearing is connected with the supporting disk assembly through a connecting plate installed on the slewing bearing.

Preferably, pressing blocks are further arranged on two sides of the mounting seat, an adjusting block is arranged below the mounting seat, and the pressing blocks and the adjusting block jointly adjust and position the mounting seat.

Preferably, the supporting disc assembly comprises a rotating disc, a suspension shaft and a locking nut, the center of the rotating disc penetrates through the suspension shaft and is screwed on the connecting plate, and the locking nut is in threaded fit with the end part of the suspension shaft.

Preferably, the semicircle is equipped with four recesses of being convenient for clamping location on the rotary disk for imbed T type bolt, and concentric setting circular sign scale is in order to be used for the sign work piece on the quotation of rotary disk.

Preferably, the press-fitting assembly comprises a backup block, a T-shaped bolt, a clamp disc and a pressing plate, wherein the clamp disc is an arc disc, a central hole of the clamp disc penetrates through the suspension shaft to be placed, and a locking nut is used for locking the clamp disc; the leaning block is arranged on the groove of the rotating disc through a T-shaped bolt, and the leaning block is locked through the T-shaped bolt and is used for leaning and positioning the flat end face of the clamp disc; the leaf grid to be welded is arranged on the clamp disc, and the bolt with the leaf grid to be welded is fixed on the clamp disc in a compression joint mode through the pressure plate.

Preferably, a plurality of concentric circular grooves are formed in the clamp disc, so that the welding leaf grids can be conveniently positioned.

Preferably, a plurality of rotary table fixing holes are formed in the rotary table in an annular matrix manner, inner fixing holes are formed in the disc surface of the clamp disc in a same projection manner with the rotary table fixing holes, outer fixing holes arranged in an annular matrix manner are formed in the outer peripheral side of the inner fixing holes, and the rotary table fixing holes, the inner fixing holes and the outer fixing holes are used for pressing bolts of the pressing plate.

Preferably, the electrically conductive brush subassembly includes support, fixed block, spring and copper billet, the support is fixed the top of base, the fixed block sets up the top of support, the copper billet passes through the spring coupling on the fixed block, and the lateral surface of copper billet with the back butt of rotary disk.

Preferably, the base is placed on the ground by adjusting the ground feet.

Compared with the prior art, the invention has the beneficial effects that: the welding device can greatly reduce the labor intensity of workers, technically convert the traditional welding workers to a robot operator, enable the welding quality of the clapboard body to be independent of the operation proficiency of the workers through high-precision robot welding, improve the product quality and the stability of the quality, and well clamp, position and adjust the leaf gratings with different sizes.

Drawings

FIG. 1 is a schematic view of a part of a robot welding device for a steam turbine blade row according to the present invention;

FIG. 2 is a cross-sectional view of a welding device;

FIG. 3 is a schematic structural view of a rotary disk;

fig. 4 is a schematic structural view of the chuck plate.

In the figure:

1. a base;

2. rotating the disc; 21. a groove; 22. circular mark scales; 23. a turntable fixing hole;

3. a backup block;

4. a T-bolt;

5. a clamp plate; 51. a concentric circular groove; 52. an inner fixing hole; 53. an outer fixing hole;

6. pressing a plate;

7. a transmission mechanism; 701. a motor; 702. a mounting seat; 703. a drive shaft; 704. a speed reducer; 705. mounting blocks; 706. a gear; 707. a slewing bearing; 708. a connecting plate; 709. briquetting; 710. an adjusting block;

8. a support;

9. a fixed block;

10. a spring;

11. a copper block;

12. adjusting the ground feet;

13. a suspension shaft;

14. and locking the nut.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1-4, a robot welding device for a steam turbine blade cascade comprises a base 1, a transmission mechanism 7, a conductive brush assembly, a supporting disc assembly, a press-fitting assembly and a welding mechanical arm (not shown), wherein the welding mechanical arm is provided with high-pressure sensing positioning, has six degrees of freedom and has positioning function, the transmission mechanism 7 is installed in an inner cavity of the base 1 and outputs power on a front processing side surface of the base 1, the supporting disc assembly and the press-fitting assembly are vertically and drivingly connected to an output end of the transmission mechanism 7, a workpiece to be processed is adjustably clamped and positioned between the supporting disc assembly and the press-fitting assembly by the supporting disc assembly and the press-fitting assembly, and the welding mechanical arm is arranged opposite to the press-fitting assembly.

Transmission mechanism

The transmission mechanism 7 comprises a motor 701, a mounting seat 702, a transmission shaft 703, a speed reducer 704, a mounting block 705, a gear 706, a slewing bearing 707 and a connecting plate 708, wherein the mounting seat 702 is in threaded connection with a bracket in the inner cavity of the base 1 through the mounting block 705 at the bottom; the output end of the motor 701 is screwed on the back of the mounting seat 702, and the shaft end of the motor 701 is provided with a transmission shaft 703; the speed reducer 704 is screwed on the front surface of the mounting seat 702 and transmits power through the transmission shaft 703; a gear 706 is screwed on the front face of the speed reducer 704, and a rotary support 707 is installed in the inner cavity of the base 1 and is in transmission connection with the gear 706 to complete power transmission, and is connected with the support disc assembly through a connecting plate 708 installed on the rotary support 707.

Furthermore, pressing blocks 709 are further installed on two sides of the installation base 702, an adjusting block 710 is installed below the installation base 702, and the pressing blocks 709 and the adjusting block 710 perform adjusting and positioning functions on the installation base 702 together.

Support disc assembly

The supporting disc assembly comprises a rotating disc 2, a suspension shaft 13 and a locking nut 14, the center of the rotating disc 2 penetrates through the suspension shaft 13 and is screwed on the connecting plate 708, and the locking nut 14 is in threaded fit with the end part of the suspension shaft 13.

Furthermore, the semicircle is equipped with four recesses 21 that are convenient for clamping location on the rotary disk 2 for imbed T type bolt, and the concentric circular sign scale 22 that sets up on the quotation of rotary disk 2 is used for the sign work piece.

Press mounting assembly

The press-fitting assembly comprises a backup block 3, a T-shaped bolt 4, a clamp disc 5 and a pressing plate 6, wherein the clamp disc 5 is an arc disc, a central hole of the clamp disc 5 penetrates through the suspension shaft 13 to be placed, and the clamp disc 5 is locked by using a locking nut 14; the leaning block 3 is installed on the groove 21 of the rotating disc 2 through a T-shaped bolt 4, and the leaning block 3 is locked through the T-shaped bolt 4 and is tightly close to and positioned on the flat end face of the clamp disc 5; the leaf to be welded is arranged on the clamp disc 5, and the bolt with the welding leaf is fixed on the clamp disc 5 in a compression joint mode through the pressure plate 6.

Further, a plurality of concentric circular grooves 51 are formed in the fixture disc 5, so that positioning of the welding leaf grids is facilitated.

Furthermore, a plurality of turntable fixing holes 23 are formed in the rotary disk 2 in an annular matrix, inner fixing holes 52 are formed in the disk surface of the clamp disk 5 in the same projection as the turntable fixing holes 23, outer fixing holes 53 arranged in an annular matrix are formed in the outer peripheral side of the inner fixing holes 52, and the turntable fixing holes 23, the inner fixing holes 52 and the outer fixing holes 53 are used for bolt compression of the pressing plate 6.

Conductive brush assembly

The conductive brush assembly comprises a support 8, a fixing block 9, a spring 10 and a copper block 11, wherein the support 8 is fixed to the top of the base 1, the fixing block 9 is arranged at the top of the support 8, the copper block 11 is connected to the fixing block 9 through the spring 10, and the outer side face of the copper block 11 is abutted to the back face of the rotating disc 2.

Further, the base 1 is placed on the ground by adjusting the anchor 12.

The working principle of the device is as follows: after an operator presses a workpiece outside the equipment to the clamp disc 5 by using the pressing plate 6, the clamp disc 5 is hoisted to penetrate through the suspension shaft 13 of the equipment, and then the clamp disc 5 is positioned and locked by using the locking nut 14 and the backup block 3 to complete the assembling action. And starting a corresponding program according to the model of the workpiece, operating the robot with the high-pressure sensor by a worker to automatically find the actual welding position of the workpiece and welding according to a track set by the program, wherein the required welding position is distributed on the inner ring and the outer ring of the workpiece, and the robot and the transmission mechanism 7 carry out coordinated action in the welding process so that the workpiece is always in the optimal welding position relative to the welding gun. After the welding is finished and the workpiece is cooled, the worker loosens the locking nut 14 and lifts the workpiece together with the fixture disc 5 again.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a welding set of robot for steam turbine blade cascade, includes base (1), drive mechanism (7), electrically conducts brush subassembly, supporting disk subassembly, pressure equipment subassembly and takes high pressure sensing location's welding arm, its characterized in that: the transmission mechanism (7) is installed in an inner cavity of the base (1), power is output on the front machining side face of the base (1), the supporting disc assembly and the press-fitting assembly are vertically and drivingly connected and installed at the output end of the transmission mechanism (7), a workpiece to be machined is adjustably clamped and positioned between the supporting disc assembly and the press-fitting assembly, and the welding mechanical arm is opposite to the press-fitting assembly.

2. The robotic welding device of claim 1, wherein: the transmission mechanism (7) comprises a motor (701), a mounting seat (702), a transmission shaft (703), a speed reducer (704), a mounting block (705), a gear (706), a slewing bearing (707) and a connecting plate (708), and the mounting seat (702) is in threaded connection with a support in the inner cavity of the base (1) through the mounting block (705) at the bottom; the output end of the motor (701) is screwed on the back of the mounting seat (702), and a transmission shaft (703) is arranged at the shaft end of the motor (701); the speed reducer (704) is screwed on the front surface of the mounting seat (702) and transmits power through the transmission shaft (703); the gear (706) is screwed on the front surface of the speed reducer (704), the slewing bearing (707) is installed in the inner cavity of the base (1) and is in transmission connection with the gear (706) to complete power transmission, and the slewing bearing (707) is connected with the supporting disc assembly through a connecting plate (708) installed on the slewing bearing (707).

3. The robotic welding device of claim 2, wherein: pressing blocks (709) are further installed on two sides of the installation seat (702), adjusting blocks (710) are installed below the installation seat (702), and the pressing blocks (709) and the adjusting blocks (710) jointly adjust and position the installation seat (702).

4. The robotic welding device of claim 2, wherein: the supporting disc assembly comprises a rotating disc (2), a suspension shaft (13) and a locking nut (14), the center of the rotating disc (2) penetrates through the suspension shaft (13) and is in threaded connection with the connecting plate (708), and the locking nut (14) is in threaded fit with the end of the suspension shaft (13).

5. The robotic welding device of claim 4, wherein: the semicircular upper part of the rotating disc (2) is provided with four grooves (21) which are convenient for clamping and positioning and used for embedding T-shaped bolts, and the disc surface of the rotating disc (2) is concentrically provided with a circular identification scale (22) for identifying workpieces.

6. The robotic welding device of claim 4, wherein: the press-fitting assembly comprises a backup block (3), a T-shaped bolt (4), a clamp disc (5) and a pressing plate (6), wherein the clamp disc (5) is an arc disc, a central hole of the clamp disc (5) penetrates through the suspension shaft (13) to be placed, and the clamp disc (5) is locked by a locking nut (14); the leaning block (3) is installed on a groove (21) of the rotating disc (2) through a T-shaped bolt (4), and the leaning block (3) is locked through the T-shaped bolt (4) and is tightly close to and positioned on the flat end face of the clamp disc (5); the leaf grid to be welded is arranged on the clamp disc (5), and the bolt with the leaf grid to be welded is fixed on the clamp disc (5) in a compression joint mode through the pressure plate (6).

7. The robotic welding device of claim 6, wherein: the fixture disc (5) is provided with a plurality of concentric circular grooves (51) which are convenient for positioning the welding leaf grids.

8. The robotic welding device of claim 7, wherein: the clamp is characterized in that a plurality of rotary table fixing holes (23) are formed in the rotary table (2) in an annular matrix mode, inner fixing holes (52) are formed in the disc surface of the clamp disc (5) in the same projection with the rotary table fixing holes (23), outer fixing holes (53) arranged in an annular matrix mode are formed in the outer peripheral side of the inner fixing holes (52), and the rotary table fixing holes (23), the inner fixing holes (52) and the outer fixing holes (53) are used for tightly pressing bolts of a pressing plate (6).

9. The robotic welding device of claim 4, wherein: electrically conductive brush subassembly includes support (8), fixed block (9), spring (10) and copper billet (11), support (8) are fixed the top of base (1), fixed block (9) set up the top of support (8), copper billet (11) are connected through spring (10) on fixed block (9), and the lateral surface of copper billet (11) with the back butt of rotary disk (2).

10. The robotic welding device of claim 1, wherein: the base (1) is placed on the ground by adjusting the anchor feet (12).