Machining fixture for centripetal impeller

Abstract

The patent discloses a machining clamp for a centripetal impeller, which comprises a bottom plate, a supporting column, a locking bolt and an integrated pressing ring, the upper end surface of the bottom plate is provided with a threaded hole, the supporting column is fixed on the bottom plate, the locking bolt is threadedly connected with the threaded hole through the through hole of the integrated pressing ring, the integrated pressing ring is in the shape of a ring, the integrated pressing ring is provided with a plurality of deformable areas and a plurality of pressing bosses, the deformable areas and the pressing bosses are connected at intervals, the supporting column is matched with the integrated pressing ring and used for clamping the centripetal impeller; the machining clamp for the centripetal impeller solves the problems of poor stability and low efficiency in the machining process method of the current centripetal impeller, and solves the problem that the machining clamp for the centripetal impeller cannot clamp different size centripetal impellers to quickly align the casting blade reference in batch machining of the centripetal impeller, so that the product process quality stability, work efficiency and labor intensity are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a machining fixture for a centripetal impeller. Background Technology

[0002] With the continuous development of CNC technology, higher requirements have been placed on the machining precision and surface quality of aerospace components, especially high quality, lightweight, and long service life. These are the basic goals pursued in the development of aero-engines, and the foundation for achieving these goals is to improve manufacturing precision and quality. As a key component of aero-engines, the blades of radial impellers are typically manufactured using precision casting. During the machining stage, the outer diameter and end face of the end-mounting shaft must be machined based on the cast blade to ensure precise fit with other engine components. However, current machining processes for radial impellers suffer from poor stability and low efficiency. These problems not only affect production efficiency but also limit the improvement of aero-engine performance. Specifically, existing machining processes often struggle to guarantee consistency and repeatability when dealing with complex-shaped radial impellers, leading to significant fluctuations in product quality. Furthermore, low machining efficiency increases production costs, posing a considerable challenge to the aerospace manufacturing industry, which prioritizes economic efficiency and cost control. To address these issues, the industry has been exploring more advanced machining technologies. This invention aims to provide a new radial impeller machining method that effectively improves machining stability and efficiency while reducing production costs. By employing innovative processing techniques and optimizing processes, this invention ensures the machining accuracy and surface quality of the radial impeller, meeting the high-performance component requirements of aero-engines. This not only helps improve the overall performance of aero-engines but also provides technical support for the development of the aviation manufacturing industry. Summary of the Invention

[0003] This invention discloses a machining fixture for radial impellers, which can solve one of the technical problems in machining radial impellers mentioned above.

[0004] To achieve the above objectives, the present invention provides a machining fixture for a radial impeller, characterized in that it includes a base plate, a support column, a locking bolt, and an integrated pressure ring. The upper end face of the base plate is provided with a first screw hole. The support column is fixed on the base plate. The locking bolt passes through the through hole of the integrated pressure ring and is threadedly connected to the first screw hole. The integrated pressure ring is annular in shape and has multiple deformable areas and multiple clamping bosses. The deformable areas and clamping bosses are connected at intervals. The support column and the integrated pressure ring cooperate to clamp the radial impeller.

[0005] Preferably, a limiting post is also installed on the upper surface of the base plate. The length of the limiting post is less than that of the support post. The limiting post is used to limit the circumferential rotation angle of the centripetal impeller.

[0006] Preferably, there are multiple limiting posts, which are evenly distributed on the base plate.

[0007] Preferably, the four support columns are evenly distributed circumferentially on the base plate, and a blade clearance groove is provided on one side of each support column.

[0008] Preferably, the top of the support column is arc-shaped.

[0009] Preferably, an eccentric adjustment device can be detachably installed on the upper surface of the base plate. The eccentric adjustment device abuts against the radial impeller and is used to adjust the center position of the radial impeller.

[0010] Preferably, the eccentric adjustment device includes a base and a fine-tuning stud. The base is fixed on the base plate, and a second screw hole is provided at the upper end of the base. The fine-tuning stud abuts against the impeller through the second screw hole.

[0011] Preferably, there are multiple eccentric adjustment devices, which are evenly installed on the base plate.

[0012] Preferably, the integrated pressure ring has multiple non-deformable areas, and the pressing boss is disposed on the non-deformable areas.

[0013] Preferably, the base plate is annular.

[0014] The present invention provides a machining fixture for a radial impeller, which has the following advantages: the machining fixture for the radial impeller is provided with an integrated pressure ring, which has multiple non-deformable areas and multiple deformable areas, so that the integrated pressure ring fits tightly against the radial impeller, thereby adapting to radial impellers of different shapes. At the same time, the radial impeller can be quickly fixed by the integrated pressure ring and the support column, thereby improving the machining efficiency.

[0015] Furthermore, the present invention can also be detachably equipped with an eccentric adjustment device. On the one hand, an appropriate number of eccentric adjustment devices can be set according to the size of the radial impeller. On the other hand, the fine-tuning stud of the eccentric adjustment device can fine-tune the position of the impeller to adapt to radial impellers of different sizes and shapes. Through this fine-tuning, minor deviations that may occur during the manufacturing process of the radial impeller can be compensated, ensuring that the impeller is kept in the optimal position during processing. This solves the problem of machining fixtures for quickly aligning the casting blade reference in one clamping during batch processing of radial impellers. Through such fixtures, the efficiency and accuracy of radial impeller processing can be improved, labor intensity can be reduced, and processing quality can be ensured. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 This is a schematic diagram of the machining fixture for the centripetal impeller in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the machining fixture for the centripetal impeller in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the integrated pressure ring structure in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the integrated pressure ring structure in an embodiment of the present invention;

[0021] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein. Detailed Implementation

[0022] To better understand the above technical solutions, exemplary embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0023] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0024] The radial impeller is a key component of aero-engines. The blades are precision cast. During the manufacturing process, the outer diameter and end face of the mounting shaft at the end need to be machined based on the cast blades. Currently, the machining process used for radial impellers on the market has problems of poor stability and low efficiency.

[0025] To address the above problems, in one embodiment, such as Figure 1 , Figure 2As shown, a machining fixture for a radial impeller 7 is provided, including a base plate 1, a support column 3, a locking bolt 4, and an integrated pressure ring 5. The upper end face of the base plate 1 has a first screw hole 13. The support column 3 is fixed to the base plate 1. The locking bolt 4 passes through the through hole 51 of the integrated pressure ring 5 and is threadedly connected to the first screw hole 13. The integrated pressure ring 5 is annular in shape and has multiple deformable regions 53 and multiple clamping bosses 52. The deformable regions 53 and clamping bosses 52 are spaced apart. The deformable regions 53 are achieved by setting local thin-walled or slotted structures in the annular structure of the integrated pressure ring 5. As an example, the material of the integrated pressure ring 5 is elastic. In specific implementations, steel can be used, or other materials or methods can be used to make the integrated pressure ring 5. For example, the deformable area 53 can be made of aluminum alloy / fiber composite material, etc. The deformable area 53 and the non-deformable area 54 can be fixedly connected by welding / adhesion, etc. These areas can undergo elastic deformation when subjected to force, thereby adapting to the outer surface of the radial impeller 7 of different sizes and shapes. The clamping boss 52 is a rigid structure, evenly distributed between the deformable areas 53, and is used to apply a uniform clamping force to the radial impeller 7 under the action of the locking bolt 4. The support column 3 and the integrated pressure ring 5 cooperate to clamp the radial impeller 7.

[0026] Specifically, this embodiment details the structure and usage of a machining fixture for a centripetal impeller 7. The fixture includes a base plate 1, support columns 3, locking bolts 4, and an integrated pressure ring 5. The base plate 1 is the foundation of the fixture, and its upper surface is provided with first threaded holes 13. These first threaded holes 13 are used to fix the support columns 3 and to connect them threadedly to the locking bolts 4. The support columns 3 are threaded onto the base plate 1 through the first threaded holes 13. The support columns 3 are evenly distributed on the circumference of the base plate 1, providing stable support for the centripetal impeller 7. The integral pressure ring 5 is designed in a circular shape, characterized by multiple deformable areas 53 and multiple clamping bosses 52. The deformable areas 53 allow the integral pressure ring 5 to adapt to radial impellers 7 of different sizes during clamping, improving clamping flexibility and adaptability. The clamping bosses 52 are evenly distributed on the circumference of the integral pressure ring 5 and are used to cooperate with the locking bolts 4 to fix the radial impeller 7. The deformable areas 53 and the clamping bosses 52 are connected at intervals to form an alternating pattern. This design allows the integral pressure ring 5 to withstand various loads. When pressure is applied, each clamping boss 52 can deform independently, thereby better adapting to and clamping different parts of the centripetal impeller 7; the locking bolt 4 passes through the through hole 51 of the integrated pressure ring 5 and is threadedly connected to the first screw hole 13 on the base plate 1. This connection method ensures that the integrated pressure ring 5 is fixed on the base plate 1 and provides sufficient clamping force when clamping the centripetal impeller 7; the centripetal impeller 7 is placed on the support column 3 so that the outer diameter of the impeller matches the integrated pressure ring 5, and then the locking bolt 4 is gradually tightened to make the integrated pressure ring... The clamping boss 52 of the 5 contacts and clamps the radial impeller; during the clamping process, due to the deformable area 53 of the integrated pressure ring 5, it can be finely adjusted according to the specific size of the radial impeller 7 to ensure that the radial impeller is clamped evenly and firmly; once the radial impeller 7 is properly clamped, machining can begin, such as turning the shaft outer diameter and end face. The design of the fixture ensures the stability and machining accuracy of the radial impeller during the machining process. After machining is completed, the locking bolt 4 is loosened and the radial impeller 7 is removed to complete the entire machining process.

[0027] In this embodiment, the machining fixture for the centripetal impeller is equipped with an integrated pressure ring. The integrated pressure ring has multiple non-deformable areas and a number of deformable areas, so that the integrated pressure ring fits tightly against the centripetal impeller, thereby adapting to centripetal impellers of different shapes. At the same time, the centripetal impeller can be quickly fixed by the integrated pressure ring and the support column, improving machining efficiency.

[0028] In one embodiment, based on the above embodiments, see [reference]. Figure 1 As shown, a limiting post 6 is also installed on the upper surface of the base plate 1. The length of the limiting post 6 is less than that of the support post 3. The limiting post 6 is used to limit the circumferential rotation angle of the centripetal impeller 7.

[0029] Specifically, in this embodiment, we describe in detail a specially designed machining fixture for the centripetal impeller 7. This fixture improves the efficiency and accuracy of impeller machining with its unique structure and function. One of the core components of the fixture is the support columns 3, which are fixed to the base plate 1 and threadedly connected to the base plate 1 through the first screw hole 13, ensuring the stability and reliability of the structure. There are four support columns 3, which are evenly distributed on the circumference of the base plate 1. This circumferentially distributed design provides a stable support platform for the centripetal impeller 7, helping to maintain the stability of the impeller during machining. In addition, limiting columns 6 are also installed on the upper end face of the base plate 1. Their designed length is less than that of the support columns 3. This detail ensures that the limiting columns 6 will not cause any interference to the centripetal impeller when clamping the impeller, avoiding possible damage and machining errors. The main function of the limiting columns 6 is to limit the circumferential rotation angle of the centripetal impeller 7. This function is crucial to ensuring that the impeller maintains the correct position and posture during machining, thereby guaranteeing machining quality. With this carefully designed fixture, we can effectively improve the precision of impeller machining, reduce possible deviations during the machining process, and ensure that the machining quality of the impeller meets the expected standards.

[0030] In one embodiment, based on the above embodiments, see [reference]. Figure 1 , Figure 2 As shown, there are multiple limiting posts 6, which are evenly distributed on the base plate 1.

[0031] Specifically, in this embodiment, we elaborate on the design features of a machining fixture for a radial impeller 7, focusing particularly on the layout and function of the limiting posts 6. The fixture includes multiple limiting posts 6, evenly distributed on the upper surface of the base plate 1, equal in number to the support posts 3 (four in total), and precisely positioned in the four quadrants of the base plate 1. This layout allows each limiting post 6 to effectively position and fix the corresponding part of the radial impeller 7. Each limiting post 6 is threaded to the base plate 1 through a first screw hole 13, ensuring a strong and reliable connection. This evenly distributed design not only provides comprehensive support for the impeller but also ensures the stability of the impeller during machining, preventing circumferential rotation or displacement caused by machining torque or external forces, thereby guaranteeing machining accuracy and impeller machining quality. Through this design, the fixture can adapt to radial impellers of different sizes, improving the flexibility and efficiency of machining operations. The top of the limiting post 6 is designed as a cylindrical surface, which helps to contact the blades of the radial impeller 7, limit the circumferential rotation angle of the impeller, and ensure that the impeller maintains the correct position and orientation during processing. The cylindrical surface design of the limiting post 6 allows the radial impeller to make smooth contact with the limiting post 6 when clamped, reducing friction and damage during installation. The cylindrical surface of the limiting post 6 can effectively limit the rotation of the impeller and ensure that the impeller does not deviate during processing.

[0032] In one embodiment, based on the above embodiments, see [reference]. Figure 1 , Figure 2 As shown, four support columns 3 are evenly distributed circumferentially on the base plate 1, and a blade clearance groove is provided on one side of the support column 3.

[0033] Specifically, in this embodiment, we describe in detail a machining fixture for a radial impeller 7. The fixture is designed with particular emphasis on providing stable and uniform support for the radial impeller during machining. There are four support columns 3 in the fixture, evenly distributed circumferentially on the base plate 1, and threadedly connected to the base plate 1 via the first screw hole 13. This evenly distributed design not only ensures the stability of the radial impeller 7 during machining but also guarantees a uniform distribution of force, thereby avoiding impeller deformation or damage caused by uneven force. Each support column 3 has a carefully designed blade clearance groove on one side. This detail is to prevent interference between the support column 3 and the blade when clamping the impeller, thus protecting the blade from damage. The blade clearance groove design allows the support column 3 to closely conform to the contour of the impeller, while ensuring that no damage is caused to the blade during clamping, guaranteeing the integrity of the radial impeller and the machining quality. This design reflects the fixture's emphasis on protecting the details of the radial impeller while ensuring machining efficiency, further improving the safety and reliability of the machining process.

[0034] In one embodiment, based on the above embodiments, see [reference]. Figure 1 , Figure 2 As shown, the top of support column 3 is arc-shaped.

[0035] Specifically, in this embodiment, we describe in detail a machining fixture for a centripetal impeller 7, focusing particularly on the design of the support column 3. The top of the support column 3 is designed in an arc shape. This design allows for a smooth transition when the support column 3 contacts the blades of the centripetal impeller 7, reducing friction between the contact surfaces and providing a stable support surface. This arc-shaped top design not only helps protect the blades from damage but also ensures the stability of the impeller during machining, preventing unnecessary movement or vibration caused by improper support. This meticulous design ensures that the fixture extends the service life of the centripetal impeller while maintaining machining accuracy, improving machining efficiency and finished product quality. Through this arc-shaped support design, the centripetal impeller can maintain a precise position during machining, resulting in more accurate machining results and meeting the requirements of high-precision machining. Furthermore, the top of the support column 3 is made of materials such as rubber, which provides anti-slip properties and avoids damage to the centripetal impeller 7.

[0036] In one embodiment, based on the above embodiments, see [reference]. Figure 1 , Figure 2As shown, an eccentric adjustment device 2 can also be detachably installed on the upper surface of the base plate 1. The eccentric adjustment device 2 abuts against the radial impeller 7 and is used to adjust the center position of the radial impeller 7.

[0037] Specifically, in this embodiment, we elaborate on the structure and operation details of a machining fixture for a radial impeller 7, with particular emphasis on the role of the eccentric adjustment device 2. This eccentric adjustment device 2 is detachably mounted on the upper surface of the base plate 1, distributed in different directions on the base plate 1 (the number of eccentric adjustment devices 2 is determined according to actual needs). Its main function is to fine-tune the center position of the impeller, ensuring precise alignment between the impeller center and the fixture center, which is crucial for improving machining accuracy. The adjustable part of the eccentric adjustment device 2 can be multiple rotatable screws or adjustable support arms, abutting against the impeller of the radial impeller 7. By rotating the adjustable part of the eccentric adjustment device 2, the impeller position is fine-tuned to accommodate radial impellers of different sizes and shapes. This fine-tuning compensates for minor deviations that may occur during the manufacturing process of the radial impeller, ensuring that the impeller remains in the optimal position during machining, thereby achieving high-precision machining results. This precise adjustment mechanism is one of the key factors in improving the machining quality of the impeller.

[0038] In one embodiment, based on the above embodiments, see [reference]. Figure 1 , Figure 2 As shown, the eccentric adjustment device 2 includes a base and a fine-tuning stud 21. The base is fixed on the base plate 1, and a second screw hole is provided at the upper end of the base. The fine-tuning stud 21 abuts against the impeller through the second screw hole.

[0039] Specifically, in this embodiment, we describe in detail the construction and application method of an eccentric adjustment device 2, a key component of the machining fixture for the radial impeller 7. The eccentric adjustment device 2 consists of two parts: a base and a fine-tuning stud 21. The base is firmly fixed to the base plate 1 and is threadedly connected to the base plate 1 through the first screw hole 13, ensuring its stability during operation. The base is provided with a second screw hole, which is a mounting interface specifically designed for the fine-tuning stud 21. The fine-tuning stud 21 is connected to the base through these second screw holes. Its unique design allows the fine-tuning stud 21 to precisely abut against the impeller of the radial impeller 7 when rotating or moving. The design of the fine-tuning stud 21 takes into account the flexibility and precision of operation, allowing the operator to easily make fine adjustments to the center position of the impeller. This fine-tuning capability is crucial for ensuring the precise alignment of the impeller center with the fixture center, which directly affects the accuracy during machining and the quality of the final product. Through this precise adjustment, machining errors can be minimized, the machining accuracy of the impeller can be improved, and high-quality radial impeller 7 products can be produced.

[0040] In one embodiment, based on the above embodiments, see [reference]. Figure 1 , Figure 2 As shown, there are multiple eccentric adjustment devices 2, which are evenly installed on the base plate 1.

[0041] Specifically, in this embodiment, we describe in detail the specific structure and usage of the eccentric adjustment device 2 in the machining fixture for the radial impeller 7, with particular emphasis on the distribution of the eccentric adjustment device 2. Multiple eccentric adjustment devices 2 are evenly installed on the base plate 1. If there are two eccentric adjustment devices 2, they can be installed on opposite sides. If there are three eccentric adjustment devices 2, the spacing between each eccentric adjustment device 2 is equal. If there are four eccentric adjustment devices 2, they can be evenly distributed in the east, south, west, and north directions, with the adjustment device on the eccentric adjustment device 2 able to contact the impeller of the radial impeller 7. The eccentric adjustment device 2 is equipped with fine-tuning studs 21, which are installed on the eccentric adjustment... At the upper end of the section device 2, the fine-tuning studs 21 are a key component of the eccentric adjustment device 2. They allow the operator to make micron-level adjustments to the position of the radial impeller 7. Each fine-tuning stud 21 can rotate independently, so that the center of the impeller can be precisely aligned with the center of the fixture. The design of these eccentric adjustment devices 2 allows the center position of the radial impeller 7 to be adjusted from different directions to ensure that the center of the impeller coincides with the center of the fixture, thereby improving the machining accuracy. Each eccentric adjustment device 2 is threadedly connected to the base plate 1 through the first screw hole 13.

[0042] In one embodiment, based on the above embodiments, see [reference]. Figure 3 , Figure 4 As shown, the integrated pressure ring 5 has multiple non-deformable areas 54, and the pressing boss 52 is set on the non-deformable areas 54.

[0043] Specifically, this embodiment details the structure and usage of a machining fixture for a radial impeller 7, particularly the design and function of the integrated pressure ring 5. The integrated pressure ring 5 is designed in a circular shape, characterized by having multiple deformable regions 53 and multiple non-deformable regions 54. The deformable regions 53 allow the integrated pressure ring 5 to adapt to radial impellers 7 of different sizes when clamped, improving the flexibility and adaptability of clamping. The clamping bosses 52 are evenly distributed on the non-deformable regions 54 of the integrated pressure ring 5, used to cooperate with the locking bolts 4 to fix the radial impeller 7. Each clamping boss 52 of the integrated pressure ring 5 has bolt through holes 51 on both sides. These through holes 51 are used to pass through the locking bolts 4 and connect with the threaded holes on the base plate 1 to fix the integrated pressure ring 5 and clamp the radial impeller 7. This design ensures the stability and reliability of the fixture during the machining process.

[0044] In one embodiment, based on the above embodiments, see [reference]. Figure 2 As shown, the base plate 1 is a circular ring.

[0045] Specifically, this embodiment details the design and function of the base plate 1, the fundamental component of a machining fixture for a radial impeller 7. The base plate 1 adopts a circular ring structure, a design that ensures its external shape is essentially identical to that of the radial impeller 7 and the integrated pressure ring 5. The bottom surface of the base plate serves as the mounting surface, fitting snugly against the machine tool table during machining. The base plate 1 includes an outer diameter 11 and an inner hole 12. The outer diameter 11 is used for fixture clamping and alignment. The inner hole 12 not only reduces the weight of the base plate 1, improving the portability and operational flexibility of the fixture, but its design also fully considers the structural strength of the base plate 1, ensuring that even with weight reduction, the base plate 1 can still withstand various forces during machining, maintaining the stability and durability of the fixture. This meticulously designed base plate 1 not only improves machining efficiency but also extends the service life of the fixture.

[0046] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A machining fixture for a centripetal impeller, characterized in that, The device includes a base plate, a support column, a locking bolt, and an integrated pressure ring. The upper surface of the base plate has a first screw hole. The support column is fixed to the base plate. The locking bolt passes through the through hole of the integrated pressure ring and is threaded to the first screw hole. The integrated pressure ring is annular in shape and has multiple deformable areas and multiple clamping bosses. The deformable areas and clamping bosses are spaced apart. The support column and the integrated pressure ring cooperate to clamp the radial impeller. The integrated pressure ring also has multiple non-deformable areas, and the clamping bosses are located on the non-deformable areas. An eccentric adjustment device can also be detachably installed on the upper surface of the base plate. The eccentric adjustment device abuts against the radial impeller and is used to adjust the center position of the radial impeller.

2. The machining fixture for the radial impeller according to claim 1, characterized in that, The upper surface of the base plate is also equipped with a limiting post, the length of which is less than that of the support post, and the limiting post is used to limit the circumferential rotation angle of the centripetal impeller.

3. The machining fixture for the radial impeller according to claim 2, characterized in that, The limiting posts are multiple and evenly distributed on the base plate.

4. The machining fixture for the radial impeller according to claim 3, characterized in that, The four support columns are evenly distributed around the base plate, and a blade clearance groove is provided on one side of each support column.

5. The machining fixture for the radial impeller according to claim 1, characterized in that, The top of the support column is arc-shaped.

6. The machining fixture for a radial impeller according to claim 1, characterized in that, The eccentric adjustment device includes a base and a fine-tuning stud. The base is fixed on the base plate, and a second screw hole is provided at the upper end of the base. The fine-tuning stud abuts against the impeller through the second screw hole.

7. The machining fixture for a radial impeller according to claim 6, characterized in that, Multiple eccentric adjustment devices are evenly installed on the base plate.

8. The machining fixture for a radial impeller according to claim 1, characterized in that, The base plate is circular.

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