A hard metal blade welding positioning device for superhard drill bits

Abstract

The utility model discloses a kind of hard alloy cutting edge welding positioning devices for superhard drill bit, including base, driving motor, positive and negative toothed bar, sliding block, U-shaped support, gear disc, circular ring, bolt, rubber pad and angle adjusting mechanism etc., angle adjusting mechanism contains support rod, fixed disc, limit hole, rotating shaft, gear column, bolt etc..Through driving motor drives positive and negative toothed bar, make sliding block move along sliding slot, adjust two circular ring spacing, rotate bolt, let rubber pad clamping cutting edge, rotate handle, through gear column and gear disc meshing adjustment angle, bolt is inserted into limit hole locking, the above structure has realized the accurate positioning of different specifications cutting edge, firm clamping and angle adjustment, improve welding quality and efficiency, reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of drill bit cutting edge welding technology, and in particular to a cemented carbide cutting edge welding positioning device for superhard drill bits. Background Technology

[0002] In the production of superhard drill bits, the welding quality between the carbide cutting edge and the base directly affects the service life and cutting performance of the drill bit. Traditional welding positioning often relies on manual clamping or simple tooling, which has obvious defects. When positioning manually, the cutting edge angle and spacing are judged entirely by experience, resulting in large errors. This leads to uneven stress on the drill bit after welding, which can easily cause chipping and uneven wear. Simple tooling has insufficient clamping rigidity, and the high temperature of welding can easily cause micro-displacement of the cutting edge, resulting in a high scrap rate. Meanwhile, different drill bits require different positioning tools, resulting in long changeover times and hindering production efficiency. Furthermore, the high brittleness of carbide means that hard contact with metal clamps can easily damage the cutting edge, further increasing costs. Existing devices struggle to balance positioning accuracy, versatility, and cutting edge protection, becoming a technical bottleneck for the mass production of superhard drill bits. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] Therefore, the purpose of this utility model is to provide a cemented carbide cutting edge welding and positioning device for superhard drill bits, which can solve the problems of insufficient positioning accuracy, poor versatility, and the contradiction between clamping stability and cutting edge protection in existing devices.

[0005] To solve the above technical problems, this utility model provides a cemented carbide cutting edge welding and positioning device for superhard drill bits, adopting the following technical solution: It includes a base, a groove is provided at the top center of the base, a slider is slidably connected to the inner wall of the groove, a drive motor is fixedly connected to the left end of the base, a positive and negative threaded rod is fixedly connected to the output end of the drive motor, the outer surface of the positive and negative threaded rod is threadedly connected to the slider, a U-shaped bracket is fixedly connected to the upper end of the slider, a second rotating shaft is rotatably connected to the rear end of the U-shaped bracket, a gear disk is fixedly connected to the front end of the second rotating shaft through the U-shaped bracket, a connecting rod is fixedly connected to the front end of the gear disk, a ring is fixedly connected to the front end of the connecting rod, a bolt is threadedly connected to the inner wall of the ring, a rubber pad is hinged to the bottom of the bolt, and an angle adjustment mechanism is provided on the right side of the U-shaped bracket. The angle adjustment mechanism includes a support rod, a fixed plate, a first limiting hole, a second limiting hole, a first rotating shaft, a limiting plate, a gear column, and a pin.

[0006] Optionally, the number of sliders is two and they are symmetrically distributed, and the number of U-shaped brackets is two and they correspond one-to-one with the sliders.

[0007] The above technical solution ensures that the spacing adjustment based on the positive and negative threaded rods is stable and symmetrical, guarantees that the clamping force of the two rings on the cutting edge is uniform, and maintains the axial stability of the cutting edge during the welding process.

[0008] Optionally, a limiting nut is threaded onto the outer surface of the bolt, and the bottom of the limiting nut is in close contact with the outer surface of the ring.

[0009] The above technical solution, with the matching of the limiting nut and the bolt, can effectively lock the bolt extension length, prevent the bolt from loosening due to vibration, thermal expansion and contraction, etc. during welding, and ensure that the rubber pad has a constant clamping force on the blade.

[0010] Optionally, the number of bolts is eight and they are distributed in a ring around the annulus, and the number of rubber pads is eight and they correspond one-to-one with the bolts.

[0011] The above technical solution ensures uniform force distribution along the circumference of the blade, allowing for close contact with blades of different diameters while preventing excessive local pressure from damaging the blade, and simultaneously guaranteeing clamping stability.

[0012] Optionally, the number of gear disks is two and they are symmetrically distributed, and the number of rings is two and they correspond one-to-one with the gear disks.

[0013] The above technical solution, in conjunction with the angle adjustment mechanism, enables the synchronous and precise adjustment of the cutting edge angles on both sides, meeting the design requirements of superhard drill bits for symmetrical welding angles of the cutting edges.

[0014] Optionally, the support rod is located on the right side of the U-shaped bracket and is fixedly connected to the base. The top of the support rod is fixedly connected to the fixed plate. The inner wall of the fixed plate is rotatably connected to the first rotating shaft. The outer surface of the first rotating shaft is fixedly connected to the limiting plate. The limiting plate has a second limiting hole that penetrates the inside and outside. The fixed plate has a first limiting hole that penetrates the inside and outside. The front end of the pin is inserted into the first limiting hole and the second limiting hole, respectively.

[0015] The above technical solution achieves angle locking by inserting the pin into the limiting hole, ensuring that the position is fixed after the angle is adjusted and preventing angle changes during welding.

[0016] Optionally, a crank handle is fixedly connected to the rear end of the first rotating shaft, and the front end of the first rotating shaft is fixedly connected to a gear post, with the outer surface of the gear post meshing with a gear disc.

[0017] Through the above technical solution, operators can easily turn the crank handle and precisely adjust the blade angle through gear transmission, improving the operability and accuracy of angle adjustment.

[0018] In summary, this utility model has at least one of the following beneficial effects: 1. Precise positioning ensures welding quality. The combination of rings, bolts, and rubber pads provides a stable and close clamping of the cutting edge. Combined with the angle adjustment mechanism and spacing adjustment structure, it ensures that the cutting edge is accurately positioned during welding, reducing welding defects caused by positioning deviations and improving the welding quality of superhard drill bits.

[0019] 2. Convenient operation improves efficiency and protects the cutting edge, reducing wear. Each adjustment is simple to operate, such as rotating the bolt to clamp the cutting edge and turning the crank to adjust the angle. This allows workers to quickly get started, reducing clamping and adjustment time and helping to improve the production efficiency of superhard drill bits. The rubber pad at the bottom of the bolt has anti-slip properties and is a flexible contact, which can ensure the stability of clamping and avoid pinching or damaging the carbide cutting edge, reducing cutting edge wear and lowering production costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the rotating limiting mechanism of this utility model; Figure 3 This is a schematic diagram of the flipping clamping mechanism of this utility model; Figure 4 This is a schematic diagram of the clamping mechanism of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Base; 2. Support rod; 3. Fixing plate; 4. Drive motor; 5. Slide groove; 6. Limiting plate; 7. Pin; 8. First limiting hole; 9. Second limiting hole; 10. First rotating shaft; 11. Gear column; 12. Handle; 13. U-shaped bracket; 14. Slider; 15. Second rotating shaft; 16. Gear disk; 17. Connecting rod; 18. Ring; 19. Bolt; 20. Rubber pad; 21. Limiting nut; 22. Positive and negative threaded rod. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] Reference Figure 1-4 This utility model discloses a cemented carbide cutting edge welding and positioning device for superhard drill bits, comprising a base 1, a groove 5 at the top center of the base 1, a slider 14 slidably connected to the inner wall of the groove 5, a drive motor 4 fixedly connected to the left end of the base 1, a positive and negative threaded rod 22 fixedly connected to the output end of the drive motor 4, the outer surface of the positive and negative threaded rod 22 being threadedly connected to the slider 14, a U-shaped bracket 13 fixedly connected to the upper end of the slider 14, a second rotating shaft 15 rotatably connected to the rear end of the U-shaped bracket 13, a gear disk 16 fixedly connected to the front end of the second rotating shaft 15 passing through the U-shaped bracket 13, a connecting rod 17 fixedly connected to the front end of the gear disk 16, a ring 18 fixedly connected to the front end of the connecting rod 17, a bolt 19 threadedly connected to the inner wall of the ring 18, a rubber pad 20 hinged to the bottom of the bolt 19, and an angle adjustment mechanism provided on the right side of the U-shaped bracket 13.

[0025] There are two sliders 14, which are symmetrically distributed. There are two U-shaped brackets 13, which correspond one-to-one with the sliders 14. The outer surface of the bolt 19 is threaded with a limit nut 21. The bottom of the limit nut 21 is tightly fitted with the outer surface of the ring 18. There are eight bolts 19, which are distributed in a ring around the ring 18. There are eight rubber pads 20, which correspond one-to-one with the bolts 19. There are two gear disks 16, which are symmetrically distributed. There are two rings 18, which correspond one-to-one with the gear disks 16.

[0026] The angle adjustment mechanism includes a support rod 2, a fixed plate 3, a first limiting hole 8, a second limiting hole 9, a first rotating shaft 10, a limiting plate 6, a gear column 11, and a pin 7. The support rod 2 is located on the right side of the U-shaped bracket 13 and is fixedly connected to the base 1. The top of the support rod 2 is fixedly connected to the fixed plate 3. The inner wall of the fixed plate 3 is rotatably connected to the first rotating shaft 10. The outer surface of the first rotating shaft 10 is fixedly connected to the limiting plate 6. The limiting plate 6 has a second limiting hole 9 that penetrates the inside and outside. The fixed plate 3 has a first limiting hole 8 that penetrates the inside and outside. The front end of the pin 7 is inserted into the first limiting hole 8 and the second limiting hole 9, respectively. The rear end of the first rotating shaft 10 is fixedly connected to a crank 12. The front end of the first rotating shaft 10 is fixedly connected to the gear column 11. The outer surface of the gear column 11 meshes with the gear plate 16.

[0027] Working principle: This device achieves precise welding and positioning of carbide cutting edges through the coordinated operation of multiple components. First, the end of the carbide cutting edge furthest from the welding point is placed inside two rings 18. The bolts 19 distributed in a ring on the inner wall of the rings 18 are rotated, causing the rubber pads 20 hinged at the bottom of the bolts 19 to move closer to the cutting edge and fit tightly. The anti-slip properties of the rubber pads 20 and the hinge design adapt to the surface shape of the cutting edge. Then, the limiting nut 21 on the outer surface of the bolts 19 is used to lock the blade, achieving a stable clamping of the cutting edge.

[0028] When it is necessary to adjust the distance between the two rings 18 to accommodate different blade lengths, the drive motor 4 at the left end of the base 1 is started. The output end of the drive motor 4 drives the positive and negative threaded rods 22 to rotate. The slider 14, which is threaded to the positive and negative threaded rods 22, will move closer or further away from the slide groove 5 at the top center of the base 1 in sync, thereby driving the U-shaped bracket 13, gear disk 16 and ring 18 at the upper end of the slider 14 to move, thus completing the distance adjustment.

[0029] When adjusting the angle, rotate the crank 12 at the rear end of the first rotating shaft 10. The first rotating shaft 10 drives the gear column 11 at the front end to rotate. Since the gear column 11 meshes with the gear disk 16, the gear disk 16 will rotate around the second rotating shaft 15. The connecting rod 17 drives the ring 18 and the clamped blade to rotate to adjust the angle. After the angle is determined, rotate the limiting plate 6 fixed to the first rotating shaft 10 to align the second limiting hole 9 on the limiting plate 6 with the first limiting hole 8 on the fixed plate 3. Insert the pin 7 to lock the angle. The fixed plate 3 is fixed to the base 1 by the support rod 2. The whole process ensures that the blade is in a precise and stable position during welding.

[0030] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A cemented carbide cutting edge welding and positioning device for superhard drill bits, comprising a base (1), characterized in that: The base (1) has a groove (5) at the top center. A slider (14) is slidably connected to the inner wall of the groove (5). A drive motor (4) is fixedly connected to the left end of the base (1). A positive and negative threaded rod (22) is fixedly connected to the output end of the drive motor (4). The outer surface of the positive and negative threaded rod (22) is threadedly connected to the slider (14). A U-shaped bracket (13) is fixedly connected to the upper end of the slider (14). A second rotating shaft (15) is rotatably connected to the rear end of the U-shaped bracket (13). A gear disk (16) is fixedly connected to the front end of the second rotating shaft (15) through the U-shaped bracket (13). A connecting rod (17) is fixedly connected to the front end of the gear disk (16). A ring (18) is fixedly connected to the front end of the connecting rod (17). A bolt (19) is threadedly connected to the inner wall of the ring (18). A rubber pad (20) is hinged to the bottom of the bolt (19). An angle adjustment mechanism is provided on the right side of the U-shaped bracket (13). The angle adjustment mechanism includes a support rod (2), a fixed plate (3), a first limiting hole (8), a second limiting hole (9), a first rotating shaft (10), a limiting plate (6), a gear column (11), and a pin (7).

2. The carbide cutting edge welding and positioning device for superhard drill bits according to claim 1, characterized in that: The number of sliders (14) is two and they are symmetrically distributed. The number of U-shaped brackets (13) is two and they correspond one-to-one with the sliders (14).

3. The carbide cutting edge welding and positioning device for superhard drill bits according to claim 1, characterized in that: The outer surface of the bolt (19) is threaded with a limiting nut (21), and the bottom of the limiting nut (21) is in close contact with the outer surface of the ring (18).

4. The carbide cutting edge welding and positioning device for superhard drill bits according to claim 1, characterized in that: The number of bolts (19) is eight and they are distributed in a ring around the ring (18). The number of rubber pads (20) is eight and they correspond one-to-one with the bolts (19).

5. The carbide cutting edge welding and positioning device for superhard drill bits according to claim 1, characterized in that: The number of gear disks (16) is two and they are symmetrically distributed. The number of rings (18) is two and they correspond one-to-one with the gear disks (16).

6. The carbide cutting edge welding and positioning device for superhard drill bits according to claim 1, characterized in that: The support rod (2) is located on the right side of the U-shaped bracket (13) and is fixedly connected to the base (1). The top of the support rod (2) is fixedly connected to the fixed plate (3). The inner wall of the fixed plate (3) is rotatably connected to the first rotating shaft (10). The outer surface of the first rotating shaft (10) is fixedly connected to the limiting plate (6). The limiting plate (6) is provided with a second limiting hole (9) that penetrates the inside and outside. The fixed plate (3) is provided with a first limiting hole (8) that penetrates the inside and outside. The front end of the pin (7) is inserted into the first limiting hole (8) and the second limiting hole (9) respectively.

7. The carbide cutting edge welding and positioning device for superhard drill bits according to claim 1, characterized in that: A crank handle (12) is fixedly connected to the rear end of the first rotating shaft (10), and the front end of the first rotating shaft (10) is fixedly connected to the gear column (11). The outer surface of the gear column (11) is meshed with the gear disk (16).

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