Clamping device for machining of impellers

Abstract

This utility model relates to the field of impeller machining technology, specifically to a clamping device for impeller machining. It includes a clamping base, a positioning seat on top of the clamping base, an impeller limiting hole in the center of the positioning seat, the diameter of the impeller limiting hole gradually increasing from top to bottom, positioning holes distributed circumferentially around the center of the impeller limiting hole on the positioning seat, positioning elements inside the positioning holes, and external threads on the lower part of the positioning elements. Fixing holes are distributed circumferentially on the clamping base, the inner walls of the fixing holes being threaded. The positioning elements and fixing holes are threaded together to fix the positioning seat and clamping base. The positioning holes include an upper section and a lower section, the inner diameter of the upper section being larger than the inner diameter of the lower section. The positioning elements include a positioning platform and a positioning rod, the lower outer wall of the positioning rod being threaded. An anti-rotation post is provided on the clamping base. This utility model has a clever structure, is easy to operate, provides reliable and stable clamping, and is convenient to pick up and put away.

Description

Technical Field

[0001] This utility model relates to the field of impeller machining technology, specifically to a clamping device for impeller machining. Background Technology

[0002] Existing impellers are generally manufactured by casting blanks, machining on a lathe, and wire cutting keyways. A search reveals that Chinese patent CN220313108U discloses a fixing assembly for pump impeller production, including a base. A sleeve is fixedly connected to the top of the base, and a through-tube is slidably connected to the inner side of the sleeve. Several grooves are formed on both sides of the through-tube, and the top of each groove has an inclined angle. A sliding rod is slidably connected to the sleeve at the groove, with an inclined angle at the end of the sliding rod near the groove. A compression ring is fixedly connected to the end of the sliding rod away from the groove.

[0003] The shortcomings of the aforementioned patent are as follows: First, the structure of the patent is complex and inconvenient to operate. When using it, the sleeve needs to be manually adjusted to ensure that it is centered in the impeller shaft hole after insertion. If the sleeve is not centered, the sliding rods on both sides of the sleeve will slide out, making it impossible to ensure that the two sliding rods simultaneously press against the inner wall of the impeller, resulting in an unstable impeller that is prone to shaking. Second, the fixing component of the aforementioned patent is inconvenient to remove after the impeller is used. Because multiple sliding rods press against the inner wall of the impeller shaft hole, after the sleeve is reset, there is no driving force to return the sliding rods to their original position on the inner wall of the impeller or the end of the sliding rod that is away from the inner wall of the impeller, making it impossible to remove the fixing component after use. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a clamping device for impeller processing that is ingeniously structured, easy to operate, reliably and stably clamped, and convenient to pick up and put down.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A clamping device for impeller machining includes a clamping base, characterized in that: a positioning seat is provided above the clamping base, and an impeller limiting hole is provided in the middle of the positioning seat. The diameter of the impeller limiting hole gradually increases from top to bottom. Positioning holes are distributed circumferentially around the center of the impeller limiting hole on the positioning seat. A positioning element is provided in the positioning hole. The lower part of the positioning element is provided with an external thread. Fixing holes are distributed circumferentially on the clamping base. The inner wall of the fixing hole is provided with a thread. The lower end of the positioning element passes through the positioning hole and is threadedly connected to the fixing hole. In order to facilitate operation, the upper end face of the impeller shaft hole is flat and placed on the clamping base. The positioning seat is sleeved on the lower part of the outer wall of the impeller shaft hole. Through holes are evenly distributed circumferentially on the impeller. The positioning element passes through the positioning hole and enters the fixing hole and is threadedly connected to the fixing hole, thus fixing the impeller on the clamping base. The operation is convenient and the clamping is stable and reliable.

[0007] The positioning hole of this utility model includes an upper section and a lower section. The inner diameter of the upper section is larger than the inner diameter of the lower section. The positioning component includes a positioning platform and a positioning rod. The upper end of the positioning rod is fixedly connected to the positioning platform, and the lower outer wall of the positioning rod is threaded. The outer diameter of the positioning platform is larger than the outer diameter of the positioning rod, and the outer diameter of the positioning platform is larger than the inner diameter of the lower section of the positioning hole. The positioning platform is placed in the upper section of the positioning hole, and the positioning rod passes through the lower section of the positioning hole and is threadedly connected to the fixing hole. This facilitates the positioning platform to rest on the upper section of the positioning hole. The positioning platform abuts against the upper section of the positioning hole, and then against the clamping base. The positioning rod is fixedly connected to the clamping base to fix the impeller on the clamping base. The threaded connection makes disassembly and assembly convenient.

[0008] The clamping base of this utility model is provided with an anti-rotation post. The lower end of the anti-rotation post is fixedly connected to the clamping base, and the upper part of the anti-rotation post forms a limiting part to facilitate limiting the movement of the impeller by the anti-rotation post abutting against the impeller secondary blades, thereby preventing the impeller from rotating during processing.

[0009] This utility model, due to the above-mentioned structure, has the advantages of ingenious structure, convenient operation, reliable and stable clamping, and convenient picking and placing. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a top view of the present invention.

[0012] Figure 3 This is an exploded schematic diagram of this utility model.

[0013] Reference numerals: clamping base 1, positioning seat 2, impeller limiting hole 3, positioning hole 4, positioning component 5, positioning platform 6, positioning rod 7, anti-rotation column 8, impeller 9, impeller cover plate 10, connecting through hole 11, impeller blade 12, impeller secondary blade 13, impeller shaft hole 14. Detailed Implementation

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0015] A clamping device for impeller machining includes a clamping base 1, characterized in that: a positioning seat 2 is provided above the clamping base 1, and an impeller limiting hole 3 is provided in the middle of the positioning seat 2. The diameter of the impeller limiting hole 3 gradually increases from top to bottom. Positioning holes 4 are distributed circumferentially around the center of the impeller limiting hole 3 on the positioning seat 2. A positioning element 5 is provided in the positioning hole 4. The lower part of the positioning element 5 is provided with an external thread. Fixing holes are distributed circumferentially on the clamping base 1. The inner wall of the fixing hole is provided with a thread. The lower end of the positioning element 5 passes through the positioning hole 4 and is threadedly connected to the fixing hole. In order to facilitate use, the upper end face of the impeller shaft hole is flat and placed on the clamping base. The positioning seat is sleeved on the lower part of the outer wall of the impeller shaft hole. Through holes are evenly distributed on the circumference of the impeller. The positioning element passes through the positioning hole, enters the fixing hole and is threadedly connected to the fixing hole, thus fixing the impeller on the clamping base. The device is easy to operate, has stable and reliable clamping, and is easy to assemble and disassemble.

[0016] The positioning hole 4 of this utility model includes an upper section and a lower section. The inner diameter of the upper section is larger than that of the lower section. The positioning component 5 includes a positioning platform 6 and a positioning rod 7. The upper end of the positioning rod 7 is fixedly connected to the positioning platform 6. The lower outer wall of the positioning rod 7 is threaded. The outer diameter of the positioning platform 6 is larger than that of the positioning rod 7. The outer diameter of the positioning platform 6 is larger than that of the lower section of the positioning hole. The positioning platform 6 is placed in the upper section of the positioning hole. The positioning rod 7 passes through the lower section of the positioning hole and is threadedly connected to the fixing hole, so as to facilitate the positioning platform to rest on the upper section of the positioning hole. The positioning platform abuts against the upper section of the positioning hole, and then against the clamping base. The positioning rod 7 is fixedly connected to the clamping base to fix the impeller on the clamping base. The threaded connection makes disassembly and assembly convenient.

[0017] The clamping base 1 of this utility model is provided with an anti-rotation post 8. The lower end of the anti-rotation post 8 is fixedly connected to the clamping base 1, and the upper part of the anti-rotation post 8 forms a limiting part to facilitate limiting the movement of the impeller by the anti-rotation post abutting against the impeller secondary blades, thereby preventing the impeller from rotating during processing.

[0018] As attached Figure 1-3 In this utility model, the impeller 9 to be processed is the existing impeller 9. This utility model is used to clamp and fix the impeller to be processed, so as to facilitate its subsequent processing on a lathe, such as processing blades, blade shaft holes, etc. The processed part is not the structure to be protected by this utility model, so it will not be described in detail.

[0019] For ease of description, the impeller 9 to be processed in this utility model is briefly described. The impeller cover plate 10 of the impeller 9 has connecting through holes 11 distributed circumferentially around the center of the impeller shaft hole 14. The connecting through holes, positioning holes, and fixing holes are arranged in a one-to-one correspondence. The axis of the connecting through hole 11 is on the same straight line as the axis of the positioning hole 4 and the axis of the fixing hole.

[0020] Impeller blades 12 are provided on the lower end face of the impeller cover plate 10. Above the impeller blades 12, impeller auxiliary blades 13 are provided on the upper end of the impeller cover plate 10. The upper end of the impeller shaft hole 14 is higher than the impeller cover plate 10. The upper end face of the impeller shaft hole 14 is flat, used to abut against the clamping base 1 to maintain the flatness of the impeller 9. The outer diameter of the lower outer wall of the impeller shaft hole 14 gradually decreases from top to bottom. The positioning seat 2 is fitted onto the lower part of the impeller shaft hole 14. The impeller limiting hole 3 is structurally matched with the lower outer wall of the impeller shaft hole 14, allowing it to stably cover the hole.

[0021] When clamping and positioning the impeller 9, the clamping base 1 is held in place by a lathe four-jaw chuck, as shown in the attached figure. Figure 3 The upper end of the impeller shaft hole 14 faces the clamping base 1 and abuts against the clamping base 1. The impeller blades 12 are placed facing upwards. The positioning seat 2 is fitted onto the lower outer wall of the impeller shaft hole 14. The positioning seat 2 clamps the impeller between the positioning seat 2 and the clamping base 1 by cooperating with the outer wall of the impeller shaft hole 14 through the impeller limiting hole 3. The positioning parts 5 are then placed in sequence. The upper end face of the positioning table 6 has a cross groove, which facilitates the rotation of the positioning table 6 by a tool, thereby driving the positioning rod 7 to rotate. The positioning rod 7 can rotate relative to the connecting through hole and the positioning hole. The positioning rod 7 passes through the lower section of the positioning hole, connects to the through hole, and enters the fixing hole, where it is threadedly connected to the fixing hole. The positioning parts 5 are then tightened in sequence to fix the impeller 9 onto the clamping base 1. The upper side of the anti-rotation column 8 abuts against the impeller secondary blades 13. During subsequent processing of the impeller 9, the lathe will drive the clamping base 1 to rotate, which will cause the impeller 9 to have a tendency to rotate accordingly. The anti-rotation column 8 can prevent the impeller from rotating relative to the clamping base 1. (See attached...) Figure 3 For example, when the lathe drives the clamping base 1 to rotate clockwise, the impeller 9 also tends to rotate clockwise under the force. At this time, the right side of the anti-rotation column 8 abuts against the impeller secondary blade 13. Thus, the impeller 9 is limited by the anti-rotation column 8 and cannot rotate clockwise, so that the impeller 9 and the clamping base 1 keep moving synchronously and achieve stable clamping. After clamping, subsequent processing can be carried out. After processing is completed, the positioning parts are loosened in sequence, and the positioning parts and positioning seats are removed so that the impeller can be taken out. The same method can be used to clamp and position another impeller to be processed. This utility model is applicable to the clamping and positioning of batch impellers 9, which facilitates the subsequent processing of blades and impeller shaft holes 14. This utility model has a firm and reliable clamping, is easy to operate, has a threaded connection, and is easy to pick up and put away.

[0022] This utility model, due to the above-mentioned structure, has the advantages of ingenious structure, convenient operation, reliable and stable clamping, and convenient picking and placing.

Claims

1. A clamping device for impeller machining, comprising a clamping base (1), characterized in that: The clamping base (1) is provided with a positioning seat (2) above it. The positioning seat (2) is provided with an impeller limiting hole (3) in the middle. The diameter of the impeller limiting hole (3) gradually increases from top to bottom. The positioning seat (2) is provided with positioning holes (4) circumferentially distributed with the center of the impeller limiting hole (3) as the center. The positioning hole (4) is provided with a positioning element (5). The lower part of the positioning element (5) is provided with an external thread. The clamping base (1) is provided with a fixing hole circumferentially distributed. The inner wall of the fixing hole is provided with a thread. The lower end of the positioning element (5) passes through the positioning hole (4) and is threadedly connected to the fixing hole.

2. The clamping device for impeller machining according to claim 1, characterized in that: The positioning hole (4) includes an upper section and a lower section. The inner diameter of the upper section is larger than the inner diameter of the lower section. The positioning component (5) includes a positioning platform (6) and a positioning rod (7). The upper end of the positioning rod (7) is fixedly connected to the positioning platform (6). The lower outer wall of the positioning rod (7) is threaded. The outer diameter of the positioning platform (6) is larger than the outer diameter of the positioning rod (7). The outer diameter of the positioning platform (6) is larger than the inner diameter of the lower section. The positioning platform (6) is placed in the upper section of the positioning hole. The positioning rod (7) passes through the lower section of the positioning hole and is threadedly connected to the fixing hole.

3. A clamping device for impeller machining according to claim 1 or 2, characterized in that: The clamping base (1) is provided with an anti-rotation post (8), the lower end of the anti-rotation post (8) is fixedly connected to the clamping base (1), and the upper part of the anti-rotation post (8) forms a limiting part.

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