An edge-wrapping thin plate dimpling tooling and a dimpling method

Abstract

The present invention provides a beaded thin plate dimpling tooling for prefabricating dimples on the blades of beaded thin plates using a pneumatic riveting machine. The beaded thin plate dimpling tooling includes: a base, a lower support frame, an upper pressure plate, and an adjusting support. The base is movably arranged on the pneumatic riveting machine, the lower support frame is fixedly arranged on the upper surface of the base, and the upper pressure plate is arranged on the upper surface of the base through the adjusting support; a height adjusting component is arranged between the base and the upper pressure plate, and the height of the upper pressure plate can be adjusted through the height adjusting component; a punch is connected to the pneumatic riveting machine and is movably arranged above the beaded thin plate dimpling tooling. By prefabricating the rivet countersunk head dimples in a mechanical manner and using surface support and pressing, the positioning of the blade flange is avoided, and the problem of the blade body being suspended and deformed under force is solved.

Description

Technical Field

[0001] This specification relates to the technical field of blade processing, and particularly to a caulked thin plate dimpling tooling and a dimpling method. Background Art

[0002] For a certain type of blade, the intake edge requires the connection of a caulked thin plate by riveting. The caulked thin plate needs to be prefabricated with countersunk holes. Initially, overall heating was used for hot dimpling to prefabricate the countersunk holes. However, after overall heating of the caulked thin plate, the deformation was large, the profile could not fit closely with the blade, and there was a misalignment between the countersunk hole and the blade rivet hole. Secondly, a round hole (without a countersunk hole) was machined in the caulked thin plate by a machine, and it was directly riveted with a rivet. After cutting the part, it was found that the rivet was subjected to the shearing force of the caulked thin plate, and there was a risk of the rivet falling off during the operation of the blade. Finally, local heating was considered for dimpling, but the diameter of the countersunk hole and the spacing between adjacent holes were too small, making it difficult to achieve local heating dimpling. Summary of the Invention

[0003] In view of this, the embodiments of this specification provide a caulked thin plate dimpling tooling and a dimpling method to solve the problems of low reliability of prefabricating countersunk holes in the caulked thin plate, low fitting degree between the caulked thin plate and the blade, and low hole position accuracy.

[0004] The embodiments of this specification provide the following technical solutions:

[0005] A caulked thin plate dimpling tooling for prefabricating countersunk holes in a blade with a caulked thin plate using a pneumatic riveting machine. The blade with a caulked thin plate is a blade with a caulked thin plate on the outside and including prefabricated positioning holes. The caulked thin plate dimpling tooling includes:

[0006] A base, a lower support frame, an upper pressure plate, and an adjusting support. The base is movably arranged on the pneumatic riveting machine. The lower support frame is fixedly arranged on the upper surface of the base. The upper pressure plate is arranged on the upper surface of the base through the adjusting support.

[0007] A height adjusting component is arranged between the base and the upper pressure plate, and the height of the upper pressure plate can be adjusted through the height adjusting component.

[0008] A punch, which is connected to the pneumatic riveting machine and is movably arranged above the caulked thin plate dimpling tooling.

[0009] Furthermore, the caulked thin plate dimpling tooling further includes a blade positioning pin assembly. The blade positioning pin assembly is fixedly arranged on the top surface of the lower support frame. The blade positioning pin assembly includes a plurality of blade positioning pins, and the blade positioning pins are one or more combinations of cylindrical pins, diamond pins, triangular pins, and elliptical pins.

[0010] Furthermore, the caulked thin plate dimpling tooling further includes a support block, a second fixing pin, and a third fixing screw. The support block is fixed on the machining side of the base through the second fixing pin and the third fixing screw.

[0011] Further, the hemming thin plate dimpling tooling further includes a positioning semi-circular groove and a positioning rod. The positioning semi-circular groove is arranged on the processing side of the base, one end of the positioning rod is inserted into the positioning semi-circular groove, and the other end of the positioning rod is inserted into the working table of the pneumatic riveting machine.

[0012] Further, the hemming thin plate dimpling tooling further includes a movable pin positioning hole and a movable pin. The movable pin positioning hole is arranged on the upper surface of the lower support frame, and the movable pin can pass through the blade with the hemming thin plate and be inserted into the movable pin positioning hole.

[0013] Further, the lower support frame is fixed to the upper surface of the base through a second fixing screw and a first fixing pin, and the adjusting support is fixed to the upper surface of the base through a nut.

[0014] Further, the height adjusting assembly includes a guide post and a shoulder nut. A shoulder nut is arranged at the upper end of the guide post. The guide post passes through the upper pressing plate, and the height of the upper pressing plate is adjusted by the position of the shoulder nut on the guide post.

[0015] Further, the hemming thin plate dimpling tooling further includes a handle and a first fixing screw. The handle is fixed to the side surface of the base through the first fixing screw.

[0016] Further, the blade with the hemming thin plate is dimpled using the hemming thin plate dimpling tooling.

[0017] Further, the dimpling method of the hemming thin plate dimpling tooling includes the following steps:

[0018] Step 1: Pre-production before dimpling. Pre-made positioning holes and chamfers are made. The hemming thin plate and the blade are assembled and drilled together to obtain a blade with a hemming thin plate.

[0019] Step 2: Connect the positioning rod and the punch to the pneumatic riveting machine.

[0020] Step 3: Fix the blade with the hemming thin plate to the hemming thin plate dimpling tooling. Position the blade with the hemming thin plate through the pre-made positioning holes and the blade positioning pin assembly, and place the blade with the hemming thin plate on the lower support frame.

[0021] Step 4: Use the height adjusting assembly to press the upper pressing plate against the blade with the hemming thin plate.

[0022] Step 5: After clamping the blade with the hemming thin plate to the hemming thin plate dimpling tooling, place a movable pin through the pre-made positioning hole and insert it into the movable pin positioning hole on the lower support frame. Dimple the pre-made positioning hole where the movable pin is not placed. Match the positioning semi-circular groove directly below the pre-made positioning hole to be dimpled with the positioning rod, start the pneumatic riveting machine, and dimple through the punch.

[0023] Step 6: After countersinking the first pre - determined positioning hole, move the base. The second adjacent positioning semi - circular groove cooperates with the positioning rod, and take out the movable pin of the second hole and place it into the pre - determined positioning hole that has been countersunk. Start the pneumatic riveting machine to countersink the second pre - determined positioning hole;

[0024] Step 7: Repeat Step 6 until the countersinking of all pre - determined positioning holes is completed.

[0025] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above - mentioned technical solutions adopted in the embodiments of this specification at least include:

[0026] Realize the mechanical pre - forming of the rivet countersunk head. Adopt surface support and pressing, avoiding the problem of using the blade flange for positioning and the deformation of the blade body due to suspended force. Use a large number of movable pins for positioning to prevent the misalignment of the edge - wrapped thin plate and the blade under force. Adopt the method of matching the positioning semi - circular groove on the base with the positioning rod, so that the positions of the countersunk holes are on the same axis. By moving the semi - circle on the base, accurate positioning can be achieved, avoiding repeated clamping and the risk of non - coincidence of hole positions. The connection between the edge - wrapped thin - plate blade and the edge - wrapped thin - plate countersinking tooling is convenient, the blade positioning is accurate, the edge - wrapped thin plate and the blade fit well, the hole positions coincide, it is light and easy to use, and the countersinking is reliable. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 is a schematic diagram of the pre - processing before countersinking of the blade with an edge - wrapped thin plate of the present invention;

[0029] Figure 2 is a schematic diagram after countersinking of the blade with an edge - wrapped thin plate of the present invention;

[0030] Figure 3 is a side view of the edge - wrapped thin - plate countersinking tooling of the present invention;

[0031] Figure 4 is a partial schematic diagram of the positioning pin part of the edge - wrapped thin - plate countersinking tooling of the present invention;

[0032] Figure 5 is a top view of the base of the edge - wrapped thin - plate countersinking tooling of the present invention;

[0033] Figure 6 is a sectional view of the support block part of the base of the edge - wrapped thin - plate countersinking tooling of the present invention;

[0034] Figure 7is the first three-dimensional view of the caulking tooling for the caulked thin plate of the present invention;

[0035] Figure 8 is the second three-dimensional view of the caulking tooling for the caulked thin plate of the present invention;

[0036] Figure 9 is the third three-dimensional view of the caulking tooling for the caulked thin plate of the present invention;

[0037] Figure 10 is the three-dimensional view of the base of the caulking tooling for the caulked thin plate of the present invention;

[0038] Figure 11 is the top view of the base of the caulking tooling for the caulked thin plate of the present invention;

[0039] Figure 12 is the first three-dimensional view of the simulated blade workpiece of the present invention;

[0040] Figure 13 is the second three-dimensional view of the simulated blade workpiece of the present invention;

[0041] Figure 14 is the sectional view of the simulated blade workpiece of the present invention;

[0042] Figure 15 is the top view of the simulated blade workpiece of the present invention.

[0043] Explanation of reference numerals: 1. Base; 2. Lower support frame; 3. Upper pressing plate; 4. Adjusting support; 5. Guide post; 6. Shoulder nut; 7. Handle; 8. First fixing screw; 9. Nut; 10. Punch; 11. First blade positioning pin; 12. Second blade positioning pin; 13. Positioning rod; 14. Second fixing screw; 15. First fixing pin; 16. Support block; 17. Second fixing pin; 18. Third fixing screw; 19. Positioning semi-circular groove; 20. Movable pin positioning hole; 21. Blade with caulked thin plate; 211. Blade; 212. Caulked thin plate; 213. Pre-determined positioning hole; 214. Countersunk socket; 22. Simulated blade workpiece. Detailed implementation manners

[0044] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0045] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope protected by the present application.

[0046] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionality in addition to one or more of the aspects described herein.

[0047] It should also be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. The diagrams only show the components related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0048] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0049] The main idea of the present invention is that after the edge-banding thin plate 212 and the blade 211 are assembled, in order to avoid deformation of the blade 211, instead of using the flange of the blade 211 for positioning, positioning pins are used for positioning, surface support and surface pressing are adopted to prevent misalignment between the surface of the edge-banding thin plate 212 and the blade 211. An active pin is used for positioning between the rivet hole of the blade 211 and the bottom hole of the edge-banding thin plate 212. A positioning semi-circular groove 19 is designed at the bottom of the edge-banding thin plate punching tooling, which cooperates with the positioning rod 13 to ensure that the countersunk head socket 214 is directly below the punch 10, facilitating alignment and achieving rapid punching.

[0050] The following will describe the technical solutions provided by the embodiments of the present application in conjunction with the accompanying drawings.

[0051] As Figure 3 , Figures 7 to 9 shown, the hemming thin plate dimpling tooling of this embodiment mainly includes a base 1, a lower support frame 2, an upper pressing plate 3, an adjusting support 4, a guide post 5, a shoulder nut 6, a handle 7, a first fixing screw 8, and a nut 9. The base 1 is used to place the hemming thin plate dimpling tooling on the workbench of the pneumatic riveting machine. The upper and lower supports of the blade 21 with the hemming thin plate are stabilized by the surface support composed of the adjusting support 4, the lower support frame 2, and the upper pressing plate 3. The height adjustment component of this embodiment is the shoulder nut 6 and the guide post 5. The shoulder nut 6 can be screwed up or down along the guide post 5, and the blade 21 with the hemming thin plate is pressed by adjusting the shoulder nut 6. The adjusting support 4 is fixedly arranged on the upper surface of the base 1 through the nut 9. Two handles 7 are fixed on both sides of the base through the first fixing screws 8.

[0052] As Figure 4 shown, the blade 21 with the hemming thin plate is fixed by the first blade positioning pin 11 and the second blade positioning pin 12. The positioning pin assembly of this embodiment includes two positioning pins, namely the first blade positioning pin 11 and the second blade positioning pin 12. The first blade positioning pin 11 is a cylindrical pin, and the second blade positioning pin 12 is a diamond pin. Through the cylindrical pin and the diamond pin, it is ensured that the fixture surface coincides with the blade surface. It is prevented that the blade 21 with the hemming thin plate cannot be properly positioned and installed when the blade 21 with the hemming thin plate is positioned and installed. For example, for the blade of the model clamped in this embodiment, if both positioning pins are cylindrical pins, the two positioning pins on the fixture cannot "accurately" cooperate with the two holes of the blade workpiece, and the blade 21 with the hemming thin plate cannot be installed.

[0053] As Figure 5 shown, in order to avoid the hemming thin plate 212 being misaligned with the blade 211 when dimpling, in addition to the holes to be dimpled and the holes that cooperate with the first blade positioning pin 11 and the second blade positioning pin 12, the hemming thin plate 212 and the blade 211 are fixed by placing a movable pin through the hemming thin plate 212 and the blade 211 and inserting it into the movable pin positioning hole 20 on the lower support 2. At the same time, the lower support 2 is fixed to the base 1 through the second fixing screw 14 and the first fixing pin 15.

[0054] The processing side of the base 1 is the side directly below the punch 10, which is the processing side for dimpling.

[0055] Refer to Figure 6, since the hemming dimpling position is close to the edge of the hemming thin plate dimpling tooling, it is subject to greater force when dimpling. The position below the dimpling position is suspended. When dimpling, one end of the blade 21 of the hemming thin plate will be lifted. Therefore, a support block 16 is added to this device to prevent the edge from being lifted. The support block 16 is fixed to the machining side of the base 1 by the second fixing pin 17 and the third fixing screw 18.

[0056] Reference Figure 10 and Figure 11 , a positioning semi-circular groove 19 is provided on the machining side of the base 1. The large end of the positioning rod 13 is inserted into the workbench of the pneumatic riveting machine, and the small end of the positioning rod 13 is inserted into the positioning semi-circular groove 19 of the base 1 to ensure the correct position of the hole. Through the cooperation of the positioning semi-circular groove 19 and the positioning rod 13, dimpling of all holes is achieved.

[0057] In some other embodiments, multiple positioning pin assemblies can be provided according to the shape of the blade, and cylindrical pins, diamond pins, triangular pins, oval pins can all be used.

[0058] In some other embodiments, the height adjustment assembly is a spring and a fixed spring device.

[0059] Such as Figures 12 to 15 shown, for blades with poor rigidity, a simulated blade workpiece 22 can also be designed. The hemming thin plate 212 and the simulated blade workpiece 22 are connected and matched as Figure 1 the same, and the hemming thin plate dimpling tooling is used for dimpling. After dimpling is completed, it is riveted and assembled with the blade together.

[0060] The hemming thin plate dimpling tooling processes dimples according to the following steps.

[0061] Step 1: Pre-production before dimpling. As Figure 1 shown, first pre-drill and pre-make positioning holes 213 and chamfers, and then assemble the hemming thin plate 212 and the blade 211 together to drill holes to obtain the blade 21 with the hemming thin plate for subsequent dimpling positioning.

[0062] Step 2: As Figure 3 shown, connect the positioning rod 13 and the punch 10 to the pneumatic riveting machine.

[0063] Step 3: Fix the blade 21 with the hemming thin plate to the dimpling tooling. The blade 21 with the hemming thin plate is positioned through the pre-made positioning holes 213 in the first step, the first blade positioning pin 11 and the second blade positioning pin 12 on the lower support frame 2, and placed on the lower support frame 2, so that the hemming thin plate 212, the blade 211 and the lower support frame 2 are closely attached.

[0064] Step 4: Press the blade 21 with the hemming thin plate by the upper pressure plate 3 through the guide post 5.

[0065] Step Five: Countersink the blade 21 with the edge-banded thin plate. After the blade 21 with the edge-banded thin plate is clamped to the countersinking tooling, the placement pin passes through the edge-banded thin plate 212 and the blade 211 and inserts into the placement pin positioning hole 20 on the lower support frame 2. Then, countersink the holes without the placement pin. The positioning semi-circular groove 19 at the bottom of the base 1 directly below the hole to be countersunk is engaged with the positioning rod 13, and the pneumatic riveting machine is started to perform countersinking through the punch 10.

[0066] Step Six: Countersink the second pre-determined positioning hole 213. After countersinking the first pre-determined positioning hole 213, move the base 1, engage the second adjacent positioning semi-circular groove 19 of the base 1 with the positioning rod 13, and take out the placement pin of the second pre-determined positioning hole 213 and place it into the already countersunk pre-determined positioning hole 213. Start the pneumatic riveting machine to perform countersinking of the second pre-determined positioning hole 213.

[0067] Step Seven: Repeat Step Six until the countersinking of all pre-determined positioning holes 213 is completed.

[0068] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiments described later, since they correspond to the system, the description is relatively simple, and the relevant parts can be referred to the description of the system embodiments.

[0069] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A hemming thin plate dimpling tooling, which is used to prefabricate countersunk holes (214) for the blades (21) of the hemming thin plate by using a pneumatic riveting machine. The blades (21) of the hemming thin plate are blades (211) with a hemming thin plate (212) wrapped outside and including prefabricated positioning holes (213). It is characterized in that, The hemming thin plate dimpling tooling includes: A base (1), a lower support frame (2), an upper pressure plate (3), and an adjusting support (4). The base (1) is movably arranged on the pneumatic riveting machine. The lower support frame (2) is fixedly arranged on the upper surface of the base (1). The upper pressure plate (3) is arranged on the upper surface of the base (1) through the adjusting support (4); A height adjusting component. The height adjusting component is arranged between the base (1) and the upper pressure plate (3). The height of the upper pressure plate (3) can be adjusted through the height adjusting component; A punch (10). The punch (10) is connected to the pneumatic riveting machine and is movably arranged above the hemming thin plate dimpling tooling; The hemming thin plate dimpling tooling further includes a support block (16), a second fixing pin (17), and a third fixing screw (18). The support block (16) is fixed on the processing side of the base (1) through the second fixing pin (17) and the third fixing screw (18); The hemming thin plate dimpling tooling further includes a positioning semi-circular groove (19) and a positioning rod (13). The positioning semi-circular groove (19) is arranged on the processing side of the base (1). One end of the positioning rod (13) is inserted into the positioning semi-circular groove (19), and the other end of the positioning rod (13) is inserted into the workbench of the pneumatic riveting machine; The hemming thin plate dimpling tooling further includes a movable pin positioning hole (20) and a movable pin. The movable pin positioning hole (20) is arranged on the upper surface of the lower support frame (2). The movable pin can pass through the blade (21) of the hemming thin plate and be inserted into the movable pin positioning hole (20); 2. The hemming thin plate dimpling tooling according to claim 1, characterized in that, The hemming thin plate dimpling tooling further includes a blade positioning pin assembly. The blade positioning pin assembly is fixedly arranged on the top surface of the lower support frame (2). The blade positioning pin assembly includes a plurality of blade positioning pins. The blade positioning pins are one or more combinations of cylindrical pins, diamond pins, triangular pins, and elliptical pins; 3. The hemming thin plate dimpling tooling according to claim 1, characterized in that, The lower support frame (2) is fixed to the upper surface of the base (1) through a second fixing screw (14) and a first fixing pin (15). The adjusting support (4) is fixed on the upper surface of the base (1) through a nut (9); 4. The hemming thin plate dimpling tooling according to claim 1, characterized in that, The height adjusting component includes a guide post (5) and a shoulder nut (6). The upper end of the guide post (5) is provided with a shoulder nut (6). The guide post (5) passes through the upper pressure plate (3), and the height of the upper pressure plate (3) is adjusted by the position of the shoulder nut (6) on the guide post (5); 5. The hemming thin plate dimpling tooling according to claim 1, characterized in that, The hemming thin plate dimpling tooling further includes a handle (7) and a first fixing screw (8). The handle (7) is fixed to the side surface of the base (1) through the first fixing screw (8); 6. A dimpling method for the hemming thin plate dimpling tooling, characterized in that, The blade (21) with a hemming thin plate is dimpled using the hemming thin plate dimpling tooling described in claim 2; 7. The dimpling method for the hemming thin plate dimpling tooling according to claim 6, characterized in that, It includes the following steps: Step 1: Pre-production before dimpling. A pre-made positioning hole (213) and a chamfer are made. The hemming thin plate (212) and the blade (211) are assembled together and drilled to obtain the blade (21) with a hemming thin plate; Step 2: Connect the positioning rod (13) and the punch (10) to the pneumatic riveting machine; Step 3: Fix the blade (21) with the edge-banded thin plate to the edge-banded thin plate dimpling tooling. Position the blade (21) with the edge-banded thin plate through the pre-made positioning holes (213) and the blade positioning pin assembly, and place the blade (21) with the edge-banded thin plate on the lower support frame (2); Step 4: Use the height adjustment assembly to press the upper pressure plate (3) against the blade (21) with the edge-banded thin plate; Step 5: After clamping the blade (21) with the edge-banded thin plate to the edge-banded thin plate dimpling tooling, place the movable pin through the pre-made positioning holes (213) and insert it into the movable pin positioning holes (20) on the lower support frame (2). Dimple the pre-made positioning holes (213) where the movable pin is not placed. Mate the positioning semi-circular groove (19) directly below the pre-made positioning hole (213) to be dimpled with the positioning rod (13), start the pneumatic riveting machine, and dimple through the punch (10); Step 6: After dimpling the first pre-made positioning hole (213), move the base (1), mate the second adjacent positioning semi-circular groove (19) with the positioning rod (13), take out the movable pin of the second hole and place it into the pre-made positioning hole (213) that has been dimpled, start the pneumatic riveting machine, and dimple the second pre-made positioning hole (213); Step 7: Repeat Step 6 until the dimpling of all pre-made positioning holes (213) is completed.

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