A special tool holder for tapping hole of butterfly valve flange hole

Abstract

The application discloses a special tool holder for tapping butterfly valve flange holes, which comprises a tool rod, a tool seat and a tool, the tool rod is fixedly connected with the tool seat through bolts, a tunnel sliding groove is arranged on the tool rod, the tool is slidingly installed in the tunnel sliding groove, a pressing block for clamping the tool is arranged on the tool rod, a rotating shaft is arranged on the pressing block, one end of the rotating shaft extends to the end face of the tool seat through the center of the tool rod, a nut is threadedly connected on the rotating shaft, a sunken groove for conveniently dismounting the nut is arranged on the tool rod, a first spring is arranged outside the rotating shaft, the first spring applies a force close to the tool seat to the nut, so that the pressing block clamps the tool, and the side of the pressing block facing the tool is provided with a driving piece, so that the tool can be driven to horizontally slide to the center of the tool rod when the pressing block rotates, the tool is made to horizontally slide along a straight line by rotating the pressing block, the exposed length of the tool is accurately controlled, the sizes of various tapping processes are ensured to be the same, the applicable range of the process is large, and the structure is reasonable and ingenious.

Description

Technical Field

[0001] This invention discloses a special countersinking tool holder for butterfly valve flange holes, belonging to the technical field of valve processing equipment. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on / off control of low-pressure pipeline media. A butterfly valve is a type of valve in which the closing element (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing.

[0003] The main components of a butterfly valve include the valve body, butterfly plate, and valve stem. Flange holes (3) are machined into the valve body for mounting flanges or pipes. Traditional machining methods include... Figure 1 As shown, a rectangular hole is cut on the tool holder 1 using wire cutting. The countersinking insert 2 is placed in the rectangular hole. After controlling the symmetry of both ends of the countersinking insert, the drilling machine is started to countersink the valve body, and finally the flange hole 3 can be machined. Since the length of the countersinking insert 2 on both sides of the tool holder cannot be guaranteed to be equal, the outer diameter of each countersink is different. In addition, the countersinking insert 2 needs to be disassembled and reassembled every time it is machined, which greatly limits the efficiency of countersinking. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art and to provide a special tool holder for counterboring flange holes in butterfly valves.

[0005] The present invention achieves the above-mentioned objective through the following technical solution: a special tool holder for counterboring flange holes of butterfly valves, comprising a tool shank, a tool holder, and a tool, wherein the tool shank and the tool holder are fixedly connected by bolts, the tool shank is provided with a tunnel groove, the tool is slidably installed in the tunnel groove, the tool shank is provided with a clamping block for holding the tool, the clamping block is provided with a rotating shaft, one end of the rotating shaft extends through the center of the tool shank to the end face of the tool holder, and a nut is threadedly connected to the rotating shaft, the tool shank is provided with a countersunk groove for easy removal of the nut, a first spring is sleeved on the outside of the rotating shaft, the first spring applies a force close to the tool holder to the nut so that the clamping block clamps the tool, the side of the clamping block facing the tool has a driving member so that the tool can be driven to slide horizontally toward the center of the tool shank when the clamping block rotates, and a positioning member is provided on the tool shank to limit the rotation of the clamping block.

[0006] Preferably, the driving component includes a plurality of Archimedean ridges arranged in an array, wherein the central angle formed by the two ends of the Archimedean ridges is less than 180°, and the first and last ends of two adjacent Archimedean ridges are on the same straight line passing through the center of the pressure block, and the cutting tool is provided with a plurality of grooves that cooperate with the Archimedean ridges.

[0007] Preferably, the cutting tool is provided in three parts, and the central angle formed by the two ends of the Archimedes ridge is 60°.

[0008] Preferably, the pressure block is provided with a pressure bearing platform that abuts against the end face of the cutter bar, and the cutter bar has an annular groove to avoid the Archimedes ridge.

[0009] Preferably, the positioning element includes a threaded sleeve, a sliding block, and a second spring. The tool bar is provided with a threaded hole for installing the threaded sleeve. The second spring and the sliding block are both located inside the threaded sleeve. The threaded block is provided with a first positioning hole. The slider is provided with a limiting post passing through the first positioning hole. The second spring applies a force to the limiting post that protrudes from the threaded sleeve. The pressure block is provided with a plurality of second positioning holes that cooperate with the limiting post.

[0010] Preferably, the outer diameter of the pressure block is the same as the outer diameter of the tool bar, and the pressure block is provided with a first scale groove, while the tool bar is provided with a number of second scale grooves the same as the number of second positioning holes, and the second scale grooves are arranged in a gradually changing pattern along the axial length of the tool bar.

[0011] Preferably, the cutting tool includes a tool holder and a blade insert, the tool holder having a mounting portion and a mounting ramp on the mounting portion, and the blade insert being mounted on the mounting ramp by bolts.

[0012] Preferably, the blade insert has a first cutting edge and a second cutting edge that cuts horizontally and vertically.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. By setting up the tool holder and the tool, the tool can slide towards the center of the tool holder under the drive of the pressure block, thereby controlling the length of the tool exposed on the outside of the tool holder. This ensures that the dimensions of each countersink are the same. Moreover, the cooperation between the pressure block and the tool before and after processing eliminates the need to disassemble and reassemble the tool again for countersinking, thus greatly improving processing efficiency and reducing the labor intensity of workers.

[0015] 2. When changing tools, simply compress the first spring downwards to release the pressure block from restricting the tool, thus achieving quick assembly and disassembly. Furthermore, the first and second scale grooves on the outside of the tool and tool holder facilitate workers' control of the countersinking dimensions, making it suitable for a wide range of applications and featuring a reasonable and ingenious structural design. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure for machining flange holes in a traditional butterfly valve;

[0017] Figure 2 This is a schematic diagram of the structure of a special countersinking tool holder for butterfly valve flange holes according to the present invention;

[0018] Figure 3This is a schematic diagram of the internal structure of a countersinking tool holder for butterfly valve flange holes according to the present invention.

[0019] Figure 4 This is a schematic diagram of the tool holder structure in this invention;

[0020] Figure 5 This is a schematic diagram of the pressure block in the present invention;

[0021] Figure 6 This is a schematic diagram of the limiting component in this invention;

[0022] Figure 7 This is a schematic diagram of the tool structure in this invention;

[0023] Reference numerals: 1. Tool holder; 2. Counterboring blade; 3. Flange hole; 4. Tool holder; 5. Cutting tool; 6. Second graduated groove; 7. First graduated groove; 8. Pressure block; 9. Nut; 10. Countersunk groove; 11. Groove; 12. First spring; 13. Shaft; 14. Tunnel chute; 15. First cutting edge; 16. Limiting element; 17. Annular groove; 18. Threaded hole; 19. Archimedes' ridge; 20. Second positioning hole; 21. Pressure plate; 22. Sliding block; 23. First positioning hole; 24. Threaded sleeve; 25. Second spring; 26. Tool holder; 27. Blade insert; 28. Mounting part; 29. ​​Second cutting edge; 30. Limiting post. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1-7As shown, a special tool holder for counterboring flange holes of butterfly valves includes a tool shank 1, a tool holder 4, and a tool 5. The tool shank 1 and the tool holder 4 are fixedly connected by bolts. The tool shank 1 is characterized by having a tunnel groove 14, in which the tool 5 is slidably installed. The tool shank 1 is provided with a clamping block 8 for holding the tool 5. The clamping block 8 is provided with a rotating shaft 13. One end of the rotating shaft 13 extends through the center of the tool shank 1 to the end face of the tool holder 4, and a nut 9 is threadedly connected to the rotating shaft 13. The tool shank 1 is provided with a countersunk groove 10 for easy removal of the nut 9. A first spring 12 is sleeved on the outside of the rotating shaft 13. The first spring 12 applies a force close to the tool holder 4 to the nut 9 so that the clamping block 8 clamps the tool 5. The side of the clamping block 8 facing the tool 5 has a driving member so that the tool 5 can be driven to slide horizontally toward the center of the tool shank 1 when the clamping block 8 rotates. The tool shank 1 is provided with a positioning member to limit the rotation of the clamping block 8. The driving component includes several Archimedean ridges 19 arranged in an array. The central angle formed by the two ends of the Archimedean ridges 19 is less than 180°, and the first and last ends of two adjacent Archimedean ridges 19 are on the same straight line passing through the center of the pressure block 8. The pressure block 8 is provided with a bearing platform 21 that abuts against the end face of the tool bar 1. The tool bar 1 has an annular groove 17 that avoids the Archimedean ridges 19. The positioning component includes a threaded sleeve 24, a sliding block 22, and a second spring 25. The tool bar 1 is provided with a threaded hole 18 for installing the threaded sleeve 24. The second spring 25 and the sliding block 22 are both located inside the threaded sleeve 24. The threaded block is provided with a first positioning hole 23. The slider is provided with a limiting post 30 that passes through the first positioning hole 23. The second spring 25 applies a force to the limiting post 30 that protrudes from the threaded sleeve 24. The pressure block 8 is provided with several second positioning holes 20 that cooperate with the limiting post 30.

[0026] The cutting tool 5 has three parts. The central angle formed by the two ends of the Archimedes ridge 19 is 60°. The pressure block 8 has a pressure platform 21 with the same height as the Archimedes ridge 19. The outer diameter of the pressure block 8 is the same as the outer diameter of the tool bar 1. The pressure block 8 has a first scale groove 7. The tool bar 1 has a number of second scale grooves 6 that are the same as the number of second positioning holes. The second scale grooves 6 are arranged in a gradually changing pattern along the axial length of the tool bar 1. The cutting tool 5 includes a tool holder 26 and a blade insert 27. The tool holder 26 has a mounting part 28. The mounting part 28 has an assembly slope. The blade insert 27 is mounted on the assembly slope by bolts. The blade insert 27 has a first cutting edge 15 and a second cutting edge 29 for cutting horizontal and vertical surfaces.

[0027] Working principle: After the cutting tool 5 is assembled onto the tool holder 1, the limiting pin 30 is pressed into the threaded sleeve 24 using a hex wrench to release its restriction on the pressure block 8. Then, the pressure block 8 is rotated, and the cutting tool 5 slides towards the center of the tool holder 1 and retracts inward by utilizing the cooperation between the groove 11 on the pressure block 8 and the Archimedes ridge 19. The cutting tool 5 is then inserted into the flange hole 3 to be counterbored. The pressure block 8 is then rotated in the opposite direction using a hex wrench. When the previous Archimedes ridge 19 slides out of one of the grooves 11, the next Archimedes ridge 19 slides into the adjacent groove 11. In this way, the length of the tool 5 exposed on the outside of the tool holder 1 can be controlled, and the tool 5 cannot automatically retract under the action of the Archimedes protrusion 19 and the limiting post 30, thereby ensuring the dimensional accuracy of each countersinking and significantly improving the processing quality. Moreover, the first scale groove 7 and the second scale groove 6 allow the worker to clearly know the rotation angle and number of turns of the pressure block 8 in order to control the diameter of the countersinking. The processing range is large, and the tool 5 does not need to be disassembled before and after processing, which can greatly reduce the preparation time. The ingenious structural design effectively improves the processing efficiency.

[0028] The first cutting edge 15 can process the end face of the flange hole 3, and the second cutting edge 29 can process the vertical face of the flange hole 3, thus meeting the surface roughness requirements of the flange hole 3. The three cutting tools 5 can process simultaneously, which can shorten the cutting time. When the cutting tool 5 is worn and needs to be replaced, simply press the nut 9 to compress the first spring 12, so that the pressure block 8 moves downward synchronously and releases the restriction on the tool holder 26, thereby realizing the quick disassembly and assembly of the cutting tool 5. In addition, the limiting post 30 cooperates with different second positioning holes 20 to restrict the rotation of the pressure block 8 and control the feed amount of the horizontal movement of the cutting tool 5. The operation is simple and convenient during adjustment. When disassembling and assembling the threaded sleeve 24, simply press the limiting post 30 into the inner side of the threaded sleeve 24 and use a hex wrench to turn the first positioning hole 23.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A special tool holder for reaming the flange hole of a butterfly valve, comprising a tool shank (1), a tool holder (4) and a tool (5), the tool shank (1) and the tool holder (4) being connected by a bolted connection, characterized in that The cutter bar (1) is provided with a tunnel chute (14), the cutter (5) is slidingly installed in the tunnel chute (14), the cutter bar (1) is provided with a pressing block (8) for clamping the cutter (5), the pressing block (8) is provided with a rotating shaft (13), one end of the rotating shaft (13) extends to the end face of the cutter seat (4) through the center of the cutter bar (1), and the rotating shaft (13) is threadedly connected with a nut (9), the cutter bar (1) is provided with a sink (10) for facilitating the disassembly of the nut (9), the outer side of the rotating shaft (13) is sleeved with a first spring (12), the first spring (12) applies a force close to the cutter seat (4) to the nut (9), so that the pressing block (8) clamps the cutter (5), one side of the pressing block (8) facing the cutter (5) has a driving member, so that the cutter (5) can be driven to slide horizontally towards the center of the cutter bar (1) when the pressing block (8) rotates, the cutter bar (1) is provided with a positioning member for limiting the rotation of the pressing block (8), the positioning member comprises a threaded sleeve (24), a sliding block (22) and a second spring (25), the cutter bar (1) is provided with a threaded hole (18) for installing the threaded sleeve (24), the second spring (25) and the sliding block (22) are located on the inner side of the threaded sleeve (24), the threaded sleeve is provided with a first positioning hole (23), the sliding block is provided with a limiting column (30) penetrating through the first positioning hole (23), the second spring (25) applies a force protruding from the threaded sleeve (24) to the limiting column (30), the pressing block (8) is provided with a plurality of second positioning holes (20) matched with the limiting column (30), the outer diameter of the pressing block (8) is the same as the outer diameter of the cutter bar (1), and the pressing block (8) is provided with a first scale groove (7), the cutter bar (1) is provided with a plurality of second scale grooves (6) which are the same as the number of the second positioning holes (20), and the second scale grooves (6) are arranged in a gradual change rule along the axial length of the cutter bar (1).

2. The special tool holder for the counterbore of the flange hole of the butterfly valve according to claim 1, characterized in that, The driving member comprises a plurality of arrayed Archimedes convex ribs (19), the central angles of the two ends of the Archimedes convex ribs (19) are less than 180°, and the beginning and end of the adjacent two Archimedes convex ribs (19) are on the same straight line passing through the center of the pressing block (8), the cutter (5) is provided with a plurality of recesses (11) matched with the Archimedes convex ribs (19).

3. The special tool holder for the flange hole of the butterfly valve according to claim 2, characterized in that, The cutter (5) is provided with three, the central angles of the two ends of the Archimedes convex ribs (19) are 60°.

4. The special tool holder for the counterbore of the flange hole of the butterfly valve according to claim 2, characterized in that, The pressing block (8) is provided with a pressure receiving table (21) abutting against the end face of the cutter bar (1), and the cutter bar (1) has an annular groove (17) avoiding the Archimedes convex rib (19).

5. The special tool holder for the counterbore of the flange hole of the butterfly valve according to claim 1, characterized in that, The cutter (5) comprises a cutter holder (26) and a blade insert (27), the cutter holder (26) has a mounting portion (28), the mounting portion (28) is provided with an assembly inclined surface, and the blade insert (27) is installed on the assembly inclined surface through bolts.

6. The special tool holder for the counterbore of the flange hole of the butterfly valve according to claim 5, characterized in that, The blade insert (27) has a cutting horizontal surface and a vertical surface, a first blade edge (15) and a second blade edge (29).

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