A riveting tooling for a riveted impeller and its usage method

Abstract

The present invention relates to a riveting tooling for a riveted impeller, which includes a drag bar, a support plate and a base. The bottom of the support plate is fixedly connected to the base. The drag bar includes a cross bar and a vertical bar. One end of the cross bar is fixedly connected to the middle of the vertical bar. The end of the cross bar connected to the vertical bar is detachably connected to the support plate. The cross bar is in a streamline shape, and a plurality of rivet holes are provided at the top of the cross bar. The usage method is as follows: rivet the rear disc and the blade; select the corresponding drag bar and place it on the support plate; place rivets in the rivet holes on the cross bar; rivet the front disc and the blade. In the present invention, the shape of the cross bar is adapted to the shape of the blade, and the multi-hole system can improve the riveting efficiency; first, rivet the blade and the rear disc, and then select the tooling adapted to the streamline shape of the blade according to the angle curve formed by the blade after riveting is completed, so that the front disc and the blade are closely fitted, increasing the airtightness of the overall impeller.

Description

Technical Field

[0001] The present invention relates to the technical field of riveted impeller processing, and particularly relates to a riveting tooling for a riveted impeller and a using method thereof. Background Art

[0002] At present, as one of the main energy-consuming devices, the technology of fans has been continuously updated and iterated, and the pursuit of high efficiency and low cost has become an inevitable pursuit of major enterprises.

[0003] The reason why a fan can generate strong wind is all due to the fan impeller. The fan impeller can not only make the fan generate wind, but also make the outgoing wind change to a certain extent through its own shape. There are many different types of fan impellers, and different types of fan impellers can make the fan generate different types of wind.

[0004] The existing fan impellers generally consist of a front disc, blades, a rear disc and a hub, and these components are mainly connected together by welding technology. Since there are many welding parts, the requirements for welding quality and technicians are relatively high, and post-welding treatment is required. The process required for the welding method is relatively complex and the cost is relatively high. There is also the use of casting technology, and the cost is also relatively high. Compared with the existing welded impellers, the riveted impeller can greatly reduce the weight of the impeller, thereby achieving the reduction of the weight of the entire fan rotor part and reducing the weight class of the fan.

[0005] Most of the existing riveting methods use a pull rivet gun to rivet with ordinary small rivets. However, most of the impellers of centrifugal fans have a relatively large diameter, and the ordinary riveting strength is far from enough. Moreover, the installation efficiency is low with the existing installation process, and the air tightness of the formed riveted impeller needs to be improved. Summary of the Invention

[0006] In order to solve the problems raised in the above background art, the present invention provides a riveting tooling for a riveted impeller and a using method thereof.

[0007] On the one hand, the present invention provides a riveting tooling for a riveted impeller, adopting the following technical scheme:

[0008] A riveting tooling for a riveted impeller includes a drag bar, a support plate and a base. The bottom of the support plate is fixedly connected to the base. The drag bar includes a cross bar and a vertical bar. One end of the cross bar is fixedly connected to the vertical bar. The end of the cross bar connected to the vertical bar is detachably connected to the support plate. The shape of the cross bar is streamlined, and a plurality of rivet holes are provided on the top of the cross bar.

[0009] By adopting the above technical scheme, the shape of the cross bar is streamlined, and rivet holes are provided on the top. The multi-hole system can improve the riveting efficiency, and the drag bar is detachably connected to the support plate, and different drag bars can be replaced according to different impeller streamlines.

[0010] Preferably, a limiting groove is provided at the top of the support plate, the limiting groove is adapted to the cross bar, and the inner side surface of the vertical bar is attached to the outer side surface of the support plate.

[0011] Preferably, the shape of the cross bar is adapted to the profile of the blade.

[0012] By adopting the above technical solution, the front disc is closely attached to the blade, increasing the airtightness of the overall impeller.

[0013] Preferably, the position of the rivet hole corresponds to the mating hole on the blade.

[0014] By adopting the above technical solution, the production efficiency of the riveted impeller is improved.

[0015] Preferably, one end of the cross bar is fixedly connected to the middle of the vertical bar.

[0016] On the other hand, the present application provides a method for using a riveting tooling for a riveted impeller, including the following steps:

[0017] S1. Drive rivets into the mating holes on the rear disc and the blade with a rivet gun;

[0018] S2. Select a corresponding drag bar and place the drag bar on the support plate;

[0019] S3. Place rivets in the rivet holes on the cross bar;

[0020] S4. Insert the cross bar into the impeller flow passage and rivet the front disc and the blade with a rivet gun.

[0021] By adopting the above technical solution, first rivet the formed blade and the rear disc, and then select a tooling adapted to the streamline shape of the blade according to the angle curve formed by the blade after riveting is completed, so that the front disc is closely attached to the blade, increasing the airtightness of the overall impeller.

[0022] Preferably, the rear disc in step S1 is a flat disc. First, mill the shape of the rivet head on an iron disc with a five-axis milling machine, then place the rivet, and drive rivets into the mating holes of the rear disc and the blade with a rivet gun.

[0023] Preferably, in step S2, select a drag bar according to the profile of the blade to be processed and the mating holes on the blade. Place the end of the cross bar connected to the vertical bar in the limiting groove, and the inner side surface of the vertical bar is attached to the outer side surface of the support plate.

[0024] Preferably, in step S4, align the rivets with the mating holes of the blade and the front disc, and rivet the front disc and the blade with a rivet gun with the tooling as the base.

[0025] In summary, the present invention has the following beneficial technical effects:

[0026] 1. In the present invention, the crossbar has a streamlined shape, and rivet holes are provided at the top. The multi-hole system can improve the riveting efficiency, and the towing rod is detachably connected to the support plate, enabling different towing rods to be replaced according to different impeller streamline shapes, with good applicability.

[0027] 2. The method of using the tooling in the present invention is to first rivet the formed blade and the rear disc, and then select the tooling adapted to the streamline shape of the blade according to the angle curve formed by the blade after riveting is completed, so that the front disc is closely attached to the blade, increasing the airtightness of the overall impeller.

[0028] 3. The tooling structure in the present invention is simple, easy to operate, and cost-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a riveting tooling for a riveted impeller of the present invention;

[0030] Figure 2 is a usage state diagram of a riveting tooling for a riveted impeller of the present invention;

[0031] Figure 3 is Figure 2 a partial enlarged view of the connection between the tooling and the blade in

[0032] Among them, 1. Towing rod; 2. Support plate; 3. Base; 4. Crossbar; 5. Vertical rod; 6. Rivet hole; 7. Limit groove; 8. Blade; 9. Rear disc; 10. Front disc. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following further describes the present invention in detail with reference to the drawings.

[0034] An embodiment of the present invention discloses a riveting tooling for a riveted impeller.

[0035] Referring to Figure 1 , it includes a towing rod 1, a support plate 2 and a base 3. The bottom of the support plate 2 is fixedly connected to the base 3. The support plate 2 plays a role in fixing the towing rod 1 and bears part of the force during riveting. The base 3 plays an overall fixing role and bears the force during riveting. The towing rod 1 includes a crossbar 4 and a vertical rod 5. One end of the crossbar 4 is fixedly connected to the middle of the vertical rod 5. The end of the crossbar 4 connected to the vertical rod 5 is detachably connected to the support plate 2. A limit groove 7 is provided at the top of the support plate 2, and the limit groove 7 is adapted to the crossbar 4. The inner side surface of the vertical rod 5 is in contact with the outer side surface of the support plate 2.

[0036] The crossbar 4 has a streamlined shape, and the shape of the crossbar 4 is adapted to the profile line of the blade 8 of the impeller. A plurality of rivet holes 6 are provided at the top of the crossbar 4, and the positions of the rivet holes 6 correspond to the mating holes on the blade 8.

[0037] Referring to Figure 2 , a method of using a riveting tool for a riveted impeller, comprising the following steps:

[0038] S1. Drive rivets into the mating holes on the rear disc 9 and the blades 8 with a rivet gun;

[0039] S2. Select the corresponding drag bar 1 and place the drag bar 1 on the support plate 2;

[0040] S3. Place rivets in the rivet holes 6 on the cross bar 4;

[0041] S4. Insert the cross bar 4 into the impeller flow channel and rivet the front disc 10 and the blades 8 with a rivet gun.

[0042] This tool is used for riveting an impeller with a flat rear disc 9 and a curved front disc 10. When in use, drive rivets into the mating holes on the rear disc 9 and the blades 8 with a rivet gun. Since the rear disc 9 is a flat disc, first mill the shape of the rivet head on an iron disc with a five-axis milling machine, then place the rivet, align it with the mating holes on the rear disc 9 and the blades 8, and drive the rivets with a rivet gun; select the drag bar 1 according to the profile of the blades 8 to be processed and the mating holes on the blades 8. The drag bar 1 includes a cross bar 4 and a vertical bar 5. The shape of the cross bar 4 is designed and selected according to the streamline shape of the blades 8. The cross bar 4 and the vertical bar 5 form a "T" shape. Place the drag bar 1 on the support plate 2. One end of the cross bar 4 connected to the vertical bar 5 is placed in the limit groove 7, and the inner side surface of the vertical bar 5 is attached to the outer side surface of the support plate 2; place rivets in the rivet holes 6 on the cross bar 4; insert the cross bar 4 into the impeller flow channel, align the rivets with the mating holes between the blades 8 and the front disc 10, and use the tool as a base to rivet the front disc 10 and the blades 8 with a rivet gun. After riveting one blade 8, move the front disc 10 and the blades 8, insert the cross bar 4 into another impeller flow channel, and repeat the above operations to complete the riveting of the front disc 10 and the blades 8.

[0043] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for using a riveting tool for a riveted impeller, characterized in that: It includes a drag bar (1), a support plate (2) and a base (3). The bottom of the support plate (2) is fixedly connected to the base (3). The drag bar (1) includes a cross bar (4) and a vertical bar (5). One end of the cross bar (4) is fixedly connected to the vertical bar (5). The end of the cross bar (4) connected to the vertical bar (5) is detachably connected to the support plate (2). The shape of the cross bar (4) is streamlined, and several rivet holes (6) are provided on the top of the cross bar (4); A limiting groove (7) is provided on the top of the support plate (2). One end of the cross bar (4) is placed in the limiting groove (7). The limiting groove (7) is adapted to the cross bar (4), and the inner side surface of the vertical bar (5) is attached to the outer side surface of the support plate (2); The shape of the cross bar (4) is adapted to the profile of the edge of the blade (8) of the impeller; The position of the rivet hole (6) corresponds to the mating hole on the blade (8); One end of the cross bar (4) is fixedly connected to the middle of the vertical bar (5); It includes the following steps: S1. Use a rivet gun to drive rivets into the mating holes on the rear disc (9) and the blade (8); S2. Select the corresponding drag bar (1) and place the drag bar (1) on the support plate (2); S3. Place rivets in the rivet holes (6) on the cross bar (4); S4. Insert the cross bar (4) into the impeller flow passage, and use a rivet gun to rivet the front disc (10) and the blade (8).

2. The method for using a riveting tool for a riveted impeller according to claim 1, characterized in that: The rear disc (9) in step S1 is a flat disc. First, use a five-axis machine to mill the shape of the rivet head on an iron disc, then place the rivet on it, align the mating holes of the rear disc (9) and the blade (8), and use a rivet gun to drive the rivets.

3. The method for using a riveting tool for a riveted impeller according to claim 1, characterized in that: In step S2, select the drag bar (1) according to the profile of the blade (8) to be processed and the mating holes on the blade (8). Place the end of the cross bar (4) connected to the vertical bar (5) in the limiting groove (7), and the inner side surface of the vertical bar (5) is attached to the outer side surface of the support plate (2).

4. The method for using a riveting tool for a riveted impeller according to claim 1, characterized in that: In step S4, align the rivets with the mating holes of the blade (8) and the front disc (10), and use the tooling as the base to rivet the front disc (10) and the blade (8) with a rivet gun.

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