KR100315539B1 - Automatic seal-welding machine for the diaphragm of turbine - Google Patents

Abstract

The present invention relates to a self-sealing welding device for a turbine diaphragm, the configuration of the present invention is to configure a self-sealing welding device for a turbine diaphragm for welding the diaphragm of the turbine, the welding of the robot 130 for performing A manipulator 110 that provides a starting point for enabling overall rotation and has a guide function of the up-down unit 120 for moving up and down; An up-down unit 120 coupled to the manifold 110 so as to be movable up and down to form an up and down moving body of the robot 130; A robot 130 installed at the up-down unit 120 and provided with an MIG and TIG welding torch at an end thereof to draw a welding trace corresponding to a value set in the controller; A wire feeder 160 formed at an upper portion of the up-down unit 120 to continuously supply a torch exchange port 150 for supporting and replacing the torch and a wire made of a material during welding; Positioning table 220 is installed in front of the manipulator 110, the welding position of the diaphragm consisting of a clamping unit 230 is installed on one side of the positioner table 220 to fix the welding object It is configured to include a positioner assembly 200 for setting, according to the present invention can form a welding device on the robot to automatically perform the welding operation to maintain the quality of the welding object quickly and uniformly, and also the apparatus of the present invention According to the torch exchanger and the wire feeder installed in the circuit, the short circuit of flow due to the nature of the work to be performed by the operation of automatically replacing the deteriorated torch during welding work and supplying the wire constituting the material continuously and stably. To shorten the working time and prevent welding defects. And it is.

Description

Automatic seal-welding machine for the diaphragm of turbine}

The present invention relates to a self-sealing welding device, and more particularly, the welding operation can be quickly and quickly performed by a robot that draws the operation trajectory by a set program of a diaphragm, which is a main component of a turbine, and a positioner that sets an optimum welding position. It is related with the automatic sealing welding apparatus for turbine diaphragms which can be made easy.

Turbines are prime movers that convert hot steam and gas pressure into fluid energy. It is generally used in nuclear power or thermal power generation, and its main component is composed of a rotor, a bucket, a diaphram, and a casing.

Among the components of the turbine, the diaphragm is a component that regulates the flow rate and hydraulic pressure of the steam generator or boiler to effectively transfer the high pressure and high temperature steam generated by the steam generator or the boiler to the rotating chain bucket. As can be seen in FIG. 1A, the diaphragm D is usually circular or semicircular in the range of 800 to 3,500 mm in diameter, and has a structure with stages of various sizes and shapes. As can be seen, in the manufacture of the diaphragm (D) it is necessary to perform a seal-welding focusing on ensuring airtightness to prevent the leakage of fluid, and a blade having a function of a substantial reaction body The blade and the band space (B) is placed between two inner and outer band spaces (B) of a thin plate shape having a circular band structure and welded thereon. It should form a final complex sealing weld (W) corresponding to the blade of a closed curve in a solution heat state.

However, since the diaphragm has a special welding shape at the end of the blade to have a curved cross section optimized for the hydrodynamic optimum efficiency, it takes a lot of welding time as it is manufactured by manual labor and requires a skilled worker, thus reducing work efficiency. There was a problem.

In addition, since the diaphragm has various constituent materials, TIG (Tungsten-Inert Gas) welding and MIG (Metal-Inert Gas) welding for molten metal corresponding to each material are welded. However, in the related art, since the tungsten and the metal wire constituting the respective materials are manually exchanged, there is a problem of lowering work efficiency.

An object of the present invention is to reduce the setting time and welding time by automating the entire process for welding work, and the turbine diaphragm can ensure the ease and uniformity of welding work by making the welding object can be set to the optimum welding position It is another object of the present invention to provide an apparatus for automatically supplying and receiving wires forming a material for TIG welding and MIG welding, thereby increasing the working time due to the wire exchange operation. It is an object of the present invention to provide an automatic sealing welding device for a turbine diaphragm that can prevent a nonuniformity in welding quality due to a short circuit in the work.

Figure 1a is a photograph showing an example of a turbine diaphragm,

Figure 1b is a photograph showing in detail the welded state of the turbine diaphragm,

Figure 2a is a front view as a whole showing an automatic sealing welding device for a turbine diaphragm according to the present invention,

2b is a plan view of FIG. 2a,

3 is a schematic view of a torch exchanger applied to an automatic sealing welding device for a turbine diaphragm according to the present invention;

4A is a view schematically showing a mechanism configuration of a clamping unit applied to an automatic sealing welding device for a turbine diaphragm according to the present invention;

Figure 4b schematically shows the configuration of the hydraulic mechanism of the clamping unit applied to the automatic sealing welding device for a turbine diaphragm according to the present invention,

5 is a photograph showing a state in which the diaphragm is set up.

* Explanation of symbols for main parts of the drawings

100: welding body assembly, 110: manipulator

120: up-down unit, 130: robot

140: welding torch, 160: wire feeder

200: positioner assembly, 210: positioner body

220: positioner table, 230: clamping unit

300: welding machine D: diaphragm B: band space

In order to achieve the above object of the present invention, the present invention provides a starting point that enables the overall rotation of the robot performing the welding in constructing an automatic sealing welding device for a turbine diaphragm for welding the diaphragm of the turbine. A manifold having a guide function of an up-down unit for moving down; An up-down unit coupled to the manifold so as to be movable up and down to form an up and down moving body of the robot; A robot installed at the end of the up-down unit and provided with an MIG and TIG welding torch at the end to draw a welding trace corresponding to a value set in the controller; A wire feeder formed at an upper portion of the up-down unit to continuously supply a torch exchange port for supporting and replacing the torch and a wire forming a material during a welding operation; A positioner assembly installed at the front of the manipulator to rotate the welding object, and a positioner assembly for setting a welding position of the diaphragm formed of a clamping unit installed at one side of the positioner table to fix the welding object. do.

Hereinafter, a configuration according to an embodiment of the present invention that can meet the above objects and features in an optimal form will be described with reference to FIGS. 2A, 2B, 3, 4A, and 4B.

The automatic sealing welding device for a turbine diaphragm according to the present invention is composed of a welding body assembly 100, a positioner assembly 200, a welding machine 300 and the like.

The welding body assembly 100 is again a manipulator (110), an up-down unit (120), a robot (130), a welding torch (140), a torch changer (150). And a wire feeder 160. The manipulator 110 is a main support of the welding apparatus by the robot 130, and a device which can rotate to avoid interference during welding setup. The up-down unit 120 is configured to move up and down on the manifold 110. The robot 130 is mounted on the up-down unit 120 to be welded, that is, diaphragm. A welding torch 140 is installed at the end to set a complex welding trajectory corresponding to the blade cross-sectional shape of (D) and perform a substantial welding operation. The robot 130 smoothly performs the MIG welding torch and the TIG welding torch. Sufficient payload and half to handle It must meet the condition of precision and have the number of axes to smoothly form the complex welding trajectory according to the blade shape. For example, the payload weight is 10 kg, the repeatability is 0.1 mm, and the number of axes is 6 axes. The robot 130 may be configured. The welding torch 140 is mounted to a joint end of the robot 130 to generate a welding arc by a wire or an electrode, and includes a MIG welding torch and a TIG welding torch. The up-down unit 120 is provided with a torch exchanger 150 for automatically replacing the welding torch 140. The torch exchange opening 150 has a function of guiding the end of the torch 140 which is operated by high pressure so as to easily replace it, and as shown in FIG. 3, the torch exchange opening 150 has a first guide pin 151. And a second guide pin 152, and a wire feeder 160 for continuously supplying wires to the welding torch 140. On the other hand, a welding object, that is, a diaphragm, is provided in front of the welding body 100. The positioner assembly 200 is installed to set the welding position to be rotatably raised and fixed, the positioner assembly 200 is composed of the positioner body 210, the positioner table 220 and the clamping unit 230, etc. The positioner body 210 forms the body of the positioner assembly 200, and the positioner table 220 is rotatably installed on the positioner body 210. The clamping part of the positioner assembly 200 is formed. Cut 230 is driven by oil pressure as a portion that secures the diaphragm the detailed configuration is threaded guide beam (231). The jaw guide beam 232, the jaw 233, and the fixing jig 234 are formed. The threaded guide beam 231 and the jaw guide beam 232 are radially disposed to serve to radially move the welding diaphragm, and the jaw 233 is a diaphragm that is a welding object. The fixing jig 234 is a fixing bolt for preventing the deformation of the weld generated during welding or the detachment of the weld produced during rotation. As shown in Figure 4b the hydraulic mechanism for driving the clamping unit 230 by the hydraulic method is a hydraulic tank (235). Hydraulic pump 236. Motor 237. The welder 300 is composed of a MIG welder and a TIG welder, and is connected to the MIG welding torch and the TIG welding torch, respectively. Shows the action by the sequence of welding operation according to the automatic sealing welding device for a turbine diaphragm of the present invention. First, in order to avoid the interference between the diaphragm (D), which is a weldment, and the robot 130 during the setup of the weldment, The rotor 110 is rotated to remove the robot 130 and the up-down unit 120 installed therein. Next, the diaphragm D, which is a welding target, is placed on the positioner table 220 mounted on the positioner body 210. Next, when setting up the band space (B) of the diaphragm (D) located on the positioner table 220 by using the jaws 233 and the fixing jig 234 of the clamping unit 230 at a time Turn on. 5 is a photograph showing the state of the set-up diaphragm. Next, the manipulator 110 is rotated to its original position while the robot 130 is adjusted by adjusting the up and down positions of the up-down unit 120 installed therein. ) Position the welding position and simultaneously rotate the diaphragm (D) set up in the positioner table 230 to maintain the downward position. Finally, the robot 130 is operated to hold the welding position. Next, the welding machine is driven to perform welding.

As described above, the automatic sealing welding device for a diaphragm according to the present invention forms a welding device on a robot drawing a programmed three-dimensional operating trajectory to automatically perform a welding operation, thereby maintaining the quality of a welding object quickly and uniformly. In addition, the robot and its peripherals can be automated to save setting time and welding time by automating the whole process, and at the same time improve the uniform welding quality by performing work along the optimal welding trajectory set by the robot. And according to the torch changer and the wire feeder installed in the apparatus of the present invention, the torch for two TIG welding and MIG welding is automatically replaced and the continuous and stable supply of the material wire is continuously performed. Due to the nature of the work to be performed, work can be prevented by short circuit Sikkim reduce the liver as well as the effect of preventing the failure of the weld.

Claims (2)

In constructing an automatic sealing welding device for a turbine diaphragm for welding a diaphragm of a turbine, A manipulator that provides a starting point that enables the overall rotation of the robot performing welding and has a guide function of an up-down unit for moving up and down; An up-down unit coupled to the manifold so as to be movable up and down to form an up and down moving body of the robot; A robot installed at the end of the up-down unit and provided with an MIG and TIG welding torch at the end to draw a welding trace corresponding to a value set in the controller; A wire feeder formed at an upper portion of the up-down unit to continuously supply a torch exchange port for supporting and replacing the torch and a wire forming a material during a welding operation; And a positioner assembly for setting a welding position of the diaphragm including a positioner table installed at the front of the manipulator and a clamping unit installed at one side of the positioner table to fix the welding object. Self-sealing welding device for turbine diaphragm. The method of claim 1, The clamping unit comprises a threaded guide beam, a jaw and a fixing jig, they are driven by a hydraulic device to secure the diaphragm, characterized in that the automatic diaphragm for turbine.