An auxiliary tooling for impeller welding

Abstract

This application relates to an auxiliary tooling for impeller welding, mainly in the technical field of machining auxiliary equipment. It includes a base detachably mounted on a machine tool. A positioning body for fixing the impeller is detachably mounted at the center of the top of the base. The positioning body includes a positioning pin and a fixing seat fixedly mounted on one end of the positioning pin. A fixing hole matching the locking bolt of the impeller is opened at the center of the other end of the positioning pin. The positioning pin is fixed at the center of the fixing seat. It also includes a fixing sleeve. A positioning platform is opened on the upper surface of the fixing seat. A snap-fit ​​ring matching the positioning platform is opened on the inner wall of the fixing sleeve. The fixing seat is detachably mounted on the base. This application solves the problem in the prior art where other auxiliary equipment is used to fix the impeller for welding. During the welding process, it is necessary to rotate the impeller or the welding machine tool to weld different positions of the impeller, which may cause impeller displacement and thus affect the welding quality.

Description

Technical Field

[0001] This application relates to the technical field of auxiliary equipment for machining, and in particular to an auxiliary tooling for impeller welding. Background Technology

[0002] In traditional wind turbine manufacturing, blades are usually welded to a disc to form an impeller. The disc has a shaft hole for subsequent assembly, and a locking bolt is fixed in the shaft hole. The fan is assembled using the locking bolt. The shaft hole is located in the center of the disc, which can serve as an ideal reference for welding positioning.

[0003] In existing technologies, other auxiliary equipment is usually used to fix the impeller, such as using a three-jaw chuck to hold the shaft hole of the impeller, or using a hydraulic expansion mandrel to cooperate with the shaft hole to fix the impeller. However, the hydraulic expansion mandrel has problems such as inconvenient disassembly, and the three-jaw chuck is prone to causing a coaxiality deviation of 0.1mm when holding the shaft hole, which seriously affects the welding accuracy. Because the shaft hole cannot be accurately positioned and the axis reference cannot be guaranteed, deviations are prone to occur during the welding process, which affects the welding quality and manufacturing accuracy of the impeller, and thus has an adverse effect on the aerodynamic performance, operating efficiency and service life of the fan. Utility Model Content

[0004] To address the problem in existing technologies where impellers are fixed using other auxiliary equipment for welding, and where welding at different positions on the impeller requires rotating the impeller or a welding machine tool, which may lead to impeller displacement and affect welding quality, this application provides an auxiliary tooling for impeller welding.

[0005] This application provides an auxiliary tooling for impeller welding, which adopts the following technical solution: An auxiliary tooling for impeller welding includes a base detachably mounted on a machine tool. A positioning body for fixing the impeller is detachably mounted at the center of the top of the base. The positioning body includes a positioning pin and a positioning seat fixedly mounted on one end of the positioning pin. A fixing hole matching the locking bolt of the impeller is opened at the center of the other end of the positioning pin. The positioning pin is fixed at the center of the positioning seat. The tooling also includes a fixing sleeve. A positioning platform is opened on the upper surface of the fixing seat. A snap ring matching the positioning ring is opened on the inner wall of the fixing sleeve. The fixing seat is detachably mounted on the base.

[0006] By adopting the above technical solution, the base can be detachably installed on the machine tool, facilitating flexible use of the tooling between different machine tools. The impeller is fixed to the positioning pin by the cooperation of the fixing hole at the end of the positioning pin and the locking bolt of the impeller. Furthermore, the positioning pin is detachably connected to the base through the cooperation of the base and the fixing sleeve, facilitating disassembly and installation. When welding impellers of different sizes is required, this can be achieved simply by replacing the positioning pin, making it convenient, quick, and applicable. Simultaneously, the base, the fixing seat of the positioning body, the positioning pin, and the fixing hole at the end of the positioning pin are all on the same straight line and located at the center of the auxiliary tooling. During the impeller welding process, a welding machine tool and a welding robotic arm are used. The robotic arm is fixed and requires rotation... Welding can be performed on different positions of an impeller using a rotary welding machine or impeller. However, rotating the impeller may cause displacement during rotation, affecting the welding quality. Therefore, using a rotary welding machine is the best choice. During the rotation of the welding machine, it is necessary to ensure that the impeller and the machine are in a relatively stationary state. This is achieved by fixing the impeller to the welding machine using auxiliary tooling. In order to ensure welding accuracy, the center of the impeller should be aligned with the center of the welding machine. In the solution provided in this application, the impeller is fixed to the auxiliary tooling through fixing holes. Ensuring that the axis of the impeller and the axis of the auxiliary tooling are on the same straight line ensures that the center of the impeller and the center of the welding machine are on the same straight line during the rotation of the welding machine, thereby improving the welding accuracy of the impeller.

[0007] Preferably, the positioning platform has a receiving surface at its edge, and the snap ring has a fitting surface that matches the receiving surface at the contact position with the receiving surface.

[0008] By adopting the above technical solution, the fixing sleeve fixes the positioning body by engaging with the positioning platform on the fixing seat of the positioning body through the snap ring. That is, the fixing sleeve presses the fixing seat onto the base, thereby achieving relative fixation between the positioning body and the base. The opening of the receiving surface and the contact surface increases the contact area between the fixing sleeve and the fixing seat, thereby enhancing the stability of the positioning body on the base.

[0009] Preferably, a positioning cavity is provided at the center of the top of the base, and a positioning block matching the positioning cavity is fixed at the center of the bottom of the fixing body.

[0010] By adopting the above technical solution, the positioning body is fixed on the base through the cooperation of the positioning block and the positioning cavity, thus ensuring accurate positioning between the base and the positioning body.

[0011] Preferably, the base includes a base plate, a fixing cylinder, and a fixing plate arranged sequentially from bottom to top. The fixing cylinder is fixedly installed at the center of the base plate, the fixing plate is detachably fixed to the top of the fixing cylinder, and the positioning cavity is opened at the center of the fixing plate.

[0012] By adopting the above technical solution, when welding impellers of different sizes is required, the size of the fixed seat may change due to the different sizes of the positioning pins, thus requiring the replacement of the fixed sleeve. The installation position between the fixed sleeve and the fixed plate also changes. The fixed plate can be detachably fixed on the fixed cylinder to realize the removal and replacement of the fixed plate, so as to be suitable for welding impellers of more sizes.

[0013] Optionally, the fixing sleeve has a positioning hole, the fixing plate has a mounting hole that matches the positioning hole, and the fixing pin is threaded through the positioning hole and connected to the mounting hole.

[0014] By adopting the above technical solution, the positioning body can be detachably fixed on the base through the cooperation of the mounting holes and positioning holes with the fixing pins, which facilitates disassembly, replacement, maintenance, etc.

[0015] Preferably, a first chamfer is provided at the edge of the positioning block at the free end of the positioning block.

[0016] By adopting the above technical solution, the opening of the first guide angle can play a guiding role, making it easier to insert the positioning block into the positioning cavity, thereby improving the installation efficiency of the positioning body.

[0017] Preferably, a second chamfer is provided at the edge of the free end of the positioning pin.

[0018] By adopting the above technical solution, the free end of the positioning pin is opened with a second guide angle, which can play a guiding role and make it easier for the positioning pin to be inserted into the relevant mating parts to achieve the positioning of the impeller. This further improves the convenience and accuracy of positioning, thereby improving the positioning accuracy during impeller welding, reducing problems such as poor impeller dynamic balance caused by inaccurate positioning, reducing additional correction costs, improving welding quality and production efficiency, and the simple structure also helps to reduce manufacturing costs.

[0019] Preferably, a limiting protrusion is fixedly installed on the upper surface of the fixing plate, and a limiting groove matching the limiting protrusion is provided on the bottom surface of the fixing sleeve.

[0020] By adopting the above technical solution, the setting of the limiting protrusion and the limiting groove can quickly realize the fixing between the fixing ring and the base, thereby increasing the installation speed of the impeller and improving production efficiency.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. After the impeller is fixed, the axis of the impeller is aligned with the auxiliary tooling in this application to ensure that the welding accuracy is not affected by the rotation of the welding machine tool during the welding process due to impeller deviation. 2. The fixing seat and the fixing sleeve of the positioning body are fixed by pressing the fixing seat onto the positioning platform of the fixing seat through the snap ring of the fixing seat. At the same time, the opening of the bearing surface of the edge of the positioning ring and the contact surface of the snap ring and the bearing surface helps to increase the friction between the fixing seat and the fixing sleeve, thereby improving the stability of the positioning body on the base and ensuring the accuracy of the impeller welding. 3. Easy to install and disassemble, requiring no multiple adjustments or manual fixing, reducing assembly time and the risk of human error, and improving mass production efficiency. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram mainly illustrating the overall structure in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the cantilever structure in Embodiment 1 of this application; Figure 3 This is an isometric schematic diagram of the main overall structure in Embodiment 1 of this application.

[0023] Reference numerals: 1. Base; 11. Base plate; 12. Fixing cylinder; 13. Fixing plate; 131. Positioning cavity; 132. Mounting hole; 133. Limiting protrusion; 2. Positioning body; 21. Positioning pin; 211. Fixing hole; 212. Second guide angle; 22. Fixing seat; 221. Positioning platform; 2211. Receiving surface; 23. Positioning block; 231. First guide angle; 3. Fixing sleeve; 31. Snap ring; 311. Fitting surface; 32. Positioning hole; 321. Fixing pin; 33. Limiting groove. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0025] This application discloses an auxiliary tooling for impeller welding.

[0026] Reference Figure 1An auxiliary tooling for impeller welding includes a base 1 detachably mounted on a machine tool and a positioning body 2 detachably mounted at the center of the base 1 for fixing the impeller. The positioning body includes a positioning pin 21 and a positioning seat fixedly mounted on one end of the positioning pin 21. A fixing hole 211 matching the locking bolt of the impeller is opened at the center of the other end of the positioning pin 21. The fixing hole 211 and the locking bolt are used to fix the impeller and the positioning body 2. The tooling also includes a fixing sleeve 3. A positioning platform 221 is opened on the upper surface of the fixing seat 22 of the positioning body 2. A snap ring 31 matching the positioning platform 221 is opened on the inner wall of the fixing sleeve 3. The fixing sleeve 3 is detachably mounted on the base 1. The fixing sleeve 3 presses the fixing seat 22 on the base 1 through the cooperation of the snap ring 31 and the positioning platform 221, thereby fixing the position of the positioning body 2 on the base 1.

[0027] Reference Figure 1 The positioning body 2 includes a positioning pin 21 and a fixing seat 22. The positioning pin 21 is located at the center of the fixing seat 22 to ensure that when the impeller is installed on the positioning body 2 through the fixing hole 211, the axis of the impeller and the axis of the positioning body 2 are on the same straight line, thereby improving the welding accuracy of the impeller. At the same time, a second guide angle 212 is provided at the edge of the free end of the positioning pin 21, that is, a second guide angle 212 is provided at the end of the positioning pin 21 where the fixing hole 211 is located. The second guide angle 212 can play a guiding role and reduce resistance. By setting the second guide angle 212, the resistance when the positioning pin 21 is inserted into the impeller shaft hole is reduced, thereby improving the installation efficiency.

[0028] Reference Figure 1 The base 1 includes a base plate 11, a fixing cylinder 12 and a fixing plate 13 arranged sequentially from bottom to top. The fixing cylinder is detachably installed at the center of the base plate 11, and the fixing plate 13 is detachably installed at the top of the fixing cylinder 12. The detachable connection of the fixing plate 13 can accommodate the fixing of impellers of more sizes.

[0029] Reference Figure 2The positioning platform 221 of the fixed base 22 has a receiving surface 2211 at its edge. The snap ring 31 has a mating surface 311 that matches the receiving surface 2211 at its contact position with the receiving surface 2211. When the fixed sleeve 3 presses the fixed base 22, the contact area between the positioning platform 221 and the snap ring 31 is increased by the cooperation between the receiving surface 2211 and the mating surface 311, thereby enhancing the stability of the positioning body 2 on the base 1. At the same time, a positioning block 23 is fixedly installed at the bottom center of the positioning body 2, that is, a positioning block 23 is fixedly installed at the bottom center of the fixed base 22. A positioning cavity 131 is opened at the top center of the fixed plate 13 of the base 1. The positioning cavity 131 matches the positioning block 23. The cooperation between the positioning block 23 and the positioning cavity 131 can quickly determine the position of the positioning body 2 on the base 1, and at the same time enhance the stability of the positioning body 2 on the base 1. Furthermore, a first chamfer 231 is provided at the edge of the free end of the positioning block 23, which serves as a guide for the positioning block 23 to be inserted into the positioning cavity 131 and can reduce the resistance of the positioning block 23 to be inserted into the positioning cavity 131, making it easier to install.

[0030] Reference Figure 2 The fixed sleeve 3 has a positioning hole 32, and the fixed plate 13 of the base 1 has a mounting hole 132 that matches the positioning hole 32. It also includes a fixing pin 321 that is threadedly connected to the mounting hole 132 through the fixing hole 211. The fixed sleeve 3 can be detachably installed on the fixed plate 13 by the cooperation of the fixing pin 321 with the positioning hole 32 and the mounting hole 132. Furthermore, a limiting protrusion 133 is fixedly installed on the upper surface of the fixed plate 13, and a limiting groove 33 that matches the limiting protrusion 133 is opened on the bottom surface of the fixed sleeve 3. The fixed sleeve 3 can be quickly fixed on the fixed plate 13 by the cooperation of the limiting protrusion 133 and the limiting groove 33, thereby improving production efficiency.

[0031] The implementation principle of this application embodiment is as follows: When welding the impeller is required, first fix the base plate 11 on the welding machine tool, then determine the size of the corresponding positioning body 2 according to the size of the impeller, and determine the size of the fixing sleeve 3 and the fixing plate 13 according to the size of the positioning body 2. Install the determined fixing plate 13 onto the fixing cylinder 12, and install the positioning body 2 onto the fixing plate 13 through the cooperation of the positioning block 23 and the positioning cavity 131. Then move the fixing sleeve 3 from the top of the positioning pin 21 to the fixing seat 22, and complete the cooperation between the snap ring 31 of the fixing sleeve 3 and the positioning table of the fixing seat 22. The fixing pin 321 passes through the fixing hole 211 and the mounting hole 132 to fix the positioning body 2 on the fixing plate 13, thus completing the installation of the auxiliary tooling. Then, the impeller is initially fixed on the positioning pin 21 by the cooperation of the fan shaft hole and the positioning pin 21. Then, the locking bolt of the impeller is used to cooperate with the fixing hole 211 opened at the end of the positioning pin 21 to fix the impeller on the positioning pin 21, thereby completing the fixation of the impeller on the welding machine tool, which facilitates the welding machine tool and the welding robot arm to cooperate in welding the impeller.

[0032] In this embodiment, the centers of the base 1 and the positioning body 2 of the auxiliary tooling are on the same straight line. When the impeller is fixed on the positioning pin 21, the axis of the impeller and the axis of the auxiliary tooling are on the same straight line. This ensures that when the welding machine rotates to weld different positions of the impeller, the impeller and the machine are in a relatively stationary state and the axis of the impeller and the axis of the welding machine are on the same straight line, thereby improving the welding accuracy of the impeller.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An auxiliary tooling for impeller welding, characterized in that: The system includes a base (1) that can be detachably mounted on a machine tool. A positioning body (2) for fixing an impeller is detachably mounted at the center of the top of the base (1). The positioning body (2) includes a positioning pin (21) and a fixing seat (22) fixedly mounted on one end of the positioning pin (21). A fixing hole (211) matching the locking bolt of the impeller is opened at the center of the other end of the positioning pin (21). The positioning pin (21) is fixed at the center of the fixing seat (22). The system also includes a fixing sleeve (3). A positioning platform (221) is opened on the upper surface of the fixing seat (22). A snap ring (31) matching the positioning platform (221) is opened on the inner wall of the fixing sleeve (3). The fixing seat (22) is detachably mounted on the base (1).

2. The auxiliary tool for welding an impeller according to claim 1, characterized in that: The positioning platform (221) has a receiving surface (2211) on its edge, and the snap ring (31) has a fitting surface (311) that matches the receiving surface (2211) at the contact position with the receiving surface (2211).

3. The auxiliary tool for welding an impeller according to claim 1, characterized in that: The base (1) has a positioning cavity (131) at the center of its top end, and the positioning block (23) that matches the positioning cavity (131) is fixed at the center of the bottom of the positioning body (2).

4. The auxiliary tool for welding an impeller according to claim 3, characterized in that: The base (1) includes a base plate (11), a fixing cylinder (12) and a fixing plate (13) arranged sequentially from bottom to top. The fixing cylinder (12) is fixedly installed at the center of the base plate (11). The fixing plate (13) is detachably fixed at the top of the fixing cylinder (12). The positioning cavity (131) is opened at the center of the fixing plate (13).

5. The auxiliary tooling for impeller welding according to claim 4, characterized in that: The fixing sleeve (3) has a positioning hole (32), and the fixing plate (13) has a mounting hole (132) that matches the positioning hole (32). It also includes a fixing pin (321) that is threaded through the positioning hole (32) and connected to the mounting hole (132).

6. The auxiliary tool for welding an impeller according to claim 3, characterized in that: The positioning block (23) has a first chamfer (231) at the edge of the free end of the positioning block (23).

7. The auxiliary tool for welding an impeller according to claim 1, characterized in that: A second chamfer (212) is provided at the edge of the free end of the positioning pin (21).

8. The auxiliary tool for welding an impeller according to claim 4, characterized in that: The upper surface of the fixing plate (13) is fixedly installed with a limiting protrusion (133), and the bottom surface of the fixing sleeve (3) is provided with a limiting groove (33) that matches the limiting protrusion (133).

Images