Multi-blade special-shaped drill

Abstract

The utility model discloses a kind of multi-blade special-shaped drill bits, including base body and the drill body on the base body, base body is used to be clamped on external driving member, drill body is used to process to external object to be handled;Drill body is specially shaped, drill body is detachably connected with base body, the end of drill body close to base body is equipped with first protruding part, first slot body for accommodating first protruding part is equipped on base body, bolt piece for limiting first protruding part is also equipped on base body, the screwing axis direction of bolt piece and the length direction of base body intersect, different shape drill body can be flexibly configured according to different processing requirements, and reduce use cost.

Description

Technical Field

[0001] This utility model relates to the field of drill bits, and in particular to a multi-bladed irregular-shaped drill bit. Background Technology

[0002] In the field of machining, drill bits, as a commonly used cutting tool, are widely used in various hole-making operations. Their performance directly affects machining efficiency, accuracy, and product quality. Traditional drill bit structures are usually relatively simple, generally consisting of a one-piece cutter body. This structure, to some extent, limits their application flexibility and adaptability.

[0003] Because the drill bit body is fixed as a whole, changing the cutting part to a different shape, size, or material to adapt to diverse machining needs often requires replacing the entire drill bit, increasing production costs. For example, when drilling some special alloy materials, it may be necessary to use drill bits of specific materials and cutting edges, and traditional drill bits cannot easily achieve this targeted replacement. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a multi-blade irregular-shaped drill bit.

[0005] The technical solution adopted by this utility model to solve its technical problem is: This utility model provides a multi-blade irregular-shaped drill bit, including a base and a drill body disposed on the base. The base is used to clamp onto an external driving component, and the drill body is used to process an external object to be processed. The drill body is irregularly shaped and detachably connected to the base. A first protrusion is provided at one end of the drill body near the base. A first groove is provided on the base for accommodating the first protrusion. A bolt is also provided on the base for limiting the first protrusion. The screwing axis of the bolt intersects the length direction of the base.

[0006] Preferably, the first protrusion has an irregular shape and a second groove. The second groove is used for the insertion of bolts to limit the first protrusion relative to the base. The irregularly shaped first protrusion and the second groove for the insertion of bolts provide a limiting structure for the connection between the drill body and the base, achieving the initial positioning of the drill body and the base during connection. This prevents the drill body from rotating randomly after installation, ensuring a stable connection and improving the stability of the processing.

[0007] Preferably, a third groove is provided on the base, which is used to accommodate the bolt. Both the third and second grooves are threaded grooves. The third and second grooves are used for the threaded connection between the bolt and the base and the first protrusion. The bolt is accommodated by the third groove, and the threaded connection between the bolt and the base and the first protrusion is achieved through the threaded groove. This creates a stable connection structure between the drill body and the base, so that the drill body and the base can be firmly connected together. During the processing, it can withstand a large cutting force without loosening, ensuring the smooth progress of the processing and improving the processing accuracy and product quality.

[0008] Preferably, the opening directions of the third groove and the second groove are both intersecting the axial direction of the base with an acute angle. Changing the tightening direction of the bolts causes the bolts to exert an oblique pulling force on the first protrusion, which enhances the connection strength between the first protrusion and the base. This effectively prevents the drill from falling off the base when rotating at high speed or bearing complex cutting forces, and improves the safety of the drill bit.

[0009] Preferably, the distance between the end of the bolt used for tightening and the drill body is smaller than the distance between the screw end of the bolt and the drill body. This optimizes the structural design of the bolt, making it easier for operators to apply force when tightening the bolt, improving the efficiency of installing and disassembling the drill body, reducing the time required to replace the drill body, and thus improving the overall processing efficiency.

[0010] Preferably, a fifth groove is provided at the end of the base away from the drill body. The fifth groove forms an arc surface structure on the base. The arc surface structure of the fifth groove can increase the contact area between the base and the clamping part of the external driving component, improve the friction between the base and the external driving component, make the base more stably driven during the processing, reduce the processing error caused by vibration, and improve the processing accuracy.

[0011] Preferably, a sixth groove is provided at the end of the base away from the drill body. There are two sixth grooves, which are located on both sides of the fifth groove. The sixth grooves form a planar structure on the base. The planar structure of the sixth groove can cooperate with specific parts of the external driving component to further constrain the position of the base, enhance the stability of the connection between the base and the external driving component, prevent the base from shifting during processing, and ensure the accuracy and stability of processing.

[0012] Preferably, a second protrusion is provided at one end of the drill body near the base, and the first protrusion is provided on the drill body via the second protrusion. The second protrusion has a frustum structure, and its diameter gradually decreases from the drill body towards the end near the base. The frustum structure of the second protrusion plays a guiding role when the drill body is connected to the base, which facilitates the drill body to quickly and accurately dock with the base, improves installation efficiency, and also helps to disperse the stress at the connection part and enhance the reliability of the connection structure.

[0013] Preferably, the diameter of the end of the second protrusion closest to the drill body is not greater than the diameter of the end of the drill body closest to the second protrusion. This ensures a natural structural transition at the connection between the second protrusion and the drill body, avoiding stress concentration. This improves the overall structural strength of the drill body, reduces the risk of damage due to unreasonable connection structure, and extends the service life of the drill bit.

[0014] Preferably, the base has a fourth groove for accommodating the second protrusion. The fourth groove provides space for the second protrusion and further constrains its position. This enhances the stability and precision of the connection between the drill body and the base, prevents the drill body from shaking or shifting during processing, and improves processing quality and accuracy.

[0015] The beneficial effects of this utility model are: During use, it ensures a stable connection, preventing the drill body from loosening or falling off due to high-speed rotation or cutting load, thus guaranteeing machining accuracy and safety.

[0016] The detachable structure allows for individual replacement or maintenance when the drill body is worn or damaged, without having to scrap the entire base, thus reducing operating costs. It also allows for flexible configuration of drill bodies of different shapes to meet different processing requirements, enhancing the adaptability and economy of the drill bit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. 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.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the drill bit structure of this utility model; Figure 2 This is one of the exploded view diagrams of the drill bit of this utility model; Figure 3 This is the second exploded view of the drill bit of this utility model; Figure 4 This is a utility model Figure 3 Enlarged view of point A in the middle; Figure 5 This is a utility model Figure 3 Enlarged diagram of point B in the middle.

[0020] The reference numerals in the figures include: 1. Base; 2. Drill body; 12. Bolt; 13. Third groove; 14. Fifth groove; 15. Sixth groove; 21. First protrusion; 211. Second groove; 22. Second protrusion. Detailed Implementation

[0021] Reference Figures 1 to 5 A multi-blade irregular-shaped drill bit includes a base 1 and a drill body 2 disposed on the base 1. The base 1 is used to clamp onto an external driving component, and the drill body 2 is used to process an external object to be processed. The drill body 2 is irregularly shaped and is detachably connected to the base 1. A first protrusion 21 is provided at one end of the drill body 2 near the base 1. A first groove is provided on the base 1 to accommodate the first protrusion 21. A bolt 12 is also provided on the base 1 to limit the first protrusion 21. The screwing axis of the bolt 12 intersects the length direction of the base 1.

[0022] With the above structural design, during use, on the one hand, it can ensure a stable connection and prevent the drill body 2 from loosening or falling off due to high-speed rotation or cutting load, thus ensuring machining accuracy and safety in use; On the other hand, the detachable structure makes it easy to replace or maintain the drill body 2 individually when it is worn or damaged, without having to scrap the entire base 1, thereby reducing the cost of use. It also allows for flexible configuration of drill bodies 2 of different shapes according to different processing requirements, enhancing the adaptability and economy of the drill bit.

[0023] Specifically, the first protrusion 21 has an irregular shape and a second groove 211 is provided on it. The second groove 211 is used for the bolt 12 to pass through, so as to limit the first protrusion 21 relative to the base 1. The irregularly shaped first protrusion 21 and the second groove 211 for the bolt 12 to pass through provide a limiting structure for the connection between the drill body 2 and the base 1, realize the initial positioning of the drill body 2 and the base 1 during connection, prevent the drill body 2 from rotating randomly after installation, provide a guarantee for subsequent stable connection, and help improve the stability of processing.

[0024] Specifically, the drill body 2 and the base body 1 can also be screwed together. The direction in which the drill body 2 is screwed to the base body 1 is designed so that the drill body 2 will not detach from the base body 1 when it is rotating during operation.

[0025] Furthermore, based on the fact that the drill body 2 and the base body 1 can be screwed together, bolts 12 can be used to further limit the movement.

[0026] Specifically, the drill body 2 can be adapted to the base body 1 using different multi-bladed irregular drill bits.

[0027] Specifically, the second groove 211 and the third groove 13 are staggered to each other, so that when the bolt 12 is tightened, it generates an oblique clamping force on the first protrusion 21, thereby improving the connection firmness. That is, at the entrance or local section, an appropriate position difference is made (for example, a slight offset at the groove opening). In this way, when the bolt 12 is screwed in, the bolt 12 will enter in an oblique posture, so that it generates an oblique tightening effect on the first protrusion 21.

[0028] Specifically, a third groove 13 is provided on the base 1. The third groove 13 is used to accommodate the bolt 12. Both the third groove 13 and the second groove 211 are threaded grooves. The third groove 13 and the second groove 211 are used for the bolt 12 to be threadedly connected to the base 1 and the first protrusion 21. The bolt 12 is accommodated by the third groove 13, and the threaded grooves realize the threaded connection between the bolt 12 and the base 1 and the first protrusion 21, thus constructing a stable connection structure between the drill body 2 and the base 1. This allows the drill body 2 and the base 1 to be firmly connected together, withstand a large cutting force during the processing without loosening, ensure the smooth progress of the processing, and improve the processing accuracy and product quality.

[0029] Specifically, the opening directions of the third groove 13 and the second groove 211 are both intersecting the axial direction of the base 1 with an acute angle. This changes the tightening direction of the bolt 12, causing the bolt 12 to exert an oblique pulling force on the first protrusion 21. This enhances the connection strength between the first protrusion 21 and the base 1, effectively preventing the drill body 2 from falling off the base 1 when rotating at high speed or subjected to complex cutting forces, thus improving the safety of the drill bit.

[0030] Specifically, the distance between the end of the bolt 12 used for tightening and the drill body 2 is smaller than the distance between the screw end of the bolt 12 and the drill body 2. This optimized structural design of the bolt 12 makes it easier for operators to apply force when tightening the bolt 12, improves the efficiency of installing and disassembling the drill body 2, reduces the time required to replace the drill body 2, and thus improves the overall processing efficiency.

[0031] Specifically, a fifth groove 14 is provided at the end of the base 1 away from the drill body 2. The fifth groove 14 forms an arc surface structure on the base 1. The arc surface structure of the fifth groove 14 can increase the contact area between the base 1 and the clamping part of the external driving component, improve the friction between the base 1 and the external driving component, make the base 1 more stably driven during the processing, reduce the processing error caused by vibration, and improve the processing accuracy.

[0032] Specifically, the base 1 is provided with a sixth groove 15 at the end away from the drill body 2. There are two sixth grooves 15, which are located on both sides of the fifth groove 14. The sixth grooves 15 form a planar structure on the base 1. The planar structure of the sixth grooves 15 can cooperate with specific parts of the external driving component to further constrain the position of the base 1, enhance the stability of the connection between the base 1 and the external driving component, prevent the base 1 from shifting during the processing, and ensure the accuracy and stability of the processing.

[0033] Specifically, the drill body 2 has a second protrusion 22 at one end near the base 1. The first protrusion 21 is located on the drill body 2 via the second protrusion 22. The second protrusion 22 has a frustum structure, and its diameter gradually decreases from the drill body 2 towards the end near the base 1. The frustum structure of the second protrusion 22 plays a guiding role when the drill body 2 is connected to the base 1, which facilitates the drill body 2 to quickly and accurately dock with the base 1, improves installation efficiency, and also helps to disperse the stress at the connection part and enhance the reliability of the connection structure.

[0034] Specifically, the cutting edges of drill body 2 can be distributed in unequal segments circumferentially and staggered at a certain height axially to disperse cutting forces. A narrow cutting edge band is provided on the outer side of each cutting edge, and the outer generatrix of the cutting edge band can be machined with a micro-taper to prevent excessive friction. The end of the cutting edge band can be formed with a retreat angle transition to reduce cutting resistance.

[0035] Specifically, the diameter of the end of the second protrusion 22 closest to the drill body 2 is no larger than the diameter of the end of the drill body 2 closest to the second protrusion 22, ensuring a natural structural transition at the connection between the second protrusion 22 and the drill body 2 and avoiding stress concentration. This improves the overall structural strength of the drill body 2, reduces the risk of damage caused by unreasonable connection structure, and extends the service life of the drill bit.

[0036] Specifically, the base 1 is provided with a fourth groove for accommodating the second protrusion 22. The fourth groove provides space for the second protrusion 22 and further constrains its position. This enhances the stability and precision of the connection between the drill body 2 and the base 1, prevents the drill body 2 from shaking or shifting during processing, and improves processing quality and accuracy.

[0037] Specifically, the non-cutting area of ​​the drill body 2 may be provided with a balance groove or a counterweight hole, and the corresponding position of the base body 1 may be provided with a counterweight hole or a balance groove to facilitate balancing during assembly. A reference line and a marking line may be engraved on the tail end surface of the base body 1 and the first protrusion 21, respectively, so that the reference line on the tail end surface of the base body 1 and the marking line on the first protrusion 21 are aligned to facilitate angle positioning during installation.

[0038] The above description provides one or more embodiments in conjunction with specific content, but it is not intended that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.

Claims

1. A multi-bladed irregular-shaped drill bit, comprising a base (1) and a drill body (2) disposed on the base (1), wherein the base (1) is used to clamp onto an external driving component, and the drill body (2) is used to process an external object to be processed; characterized in that: The drill body (2) is irregularly shaped and can be detachably connected to the base (1). The drill body (2) has a first protrusion (21) at one end near the base (1). The base (1) has a first groove for accommodating the first protrusion (21). The base (1) also has a bolt (12) for limiting the first protrusion (21). The screwing axis of the bolt (12) intersects the length direction of the base (1).

2. The multi-blade irregular-shaped drill bit according to claim 1, characterized in that: The first protrusion (21) has an irregular shape and a second groove (211) is provided on the first protrusion (21). The second groove (211) is used for the bolt (12) to pass through so as to limit the first protrusion (21) relative to the base (1).

3. A multi-bladed irregular-shaped drill bit according to claim 2, characterized in that: The base (1) has a third groove (13) for accommodating the bolt (12). Both the third groove (13) and the second groove (211) are threaded grooves. The third groove (13) and the second groove (211) are used for the bolt (12) to be threadedly connected to the base (1) and the first protrusion (21).

4. A multi-bladed irregular-shaped drill bit according to claim 3, characterized in that: The opening directions of the third groove (13) and the second groove (211) are both intersecting the axis direction of the base (1) with an acute angle.

5. A multi-bladed irregular-shaped drill bit according to any one of claims 1-4, characterized in that: The distance between the end of the bolt (12) used for screwing and the drill body (2) is smaller than the distance between the screw end of the bolt (12) and the drill body (2).

6. A multi-bladed irregular-shaped drill bit according to claim 1, characterized in that: The base (1) has a fifth groove (14) at one end away from the drill body (2), and the fifth groove (14) forms an arc surface structure on the base (1).

7. A multi-bladed irregular-shaped drill bit according to claim 6, characterized in that: The base (1) is provided with a sixth groove (15) at the end away from the drill body (2). There are two sixth grooves (15), which are located on both sides of the fifth groove (14). The sixth grooves (15) form a planar structure on the base (1).

8. A multi-bladed irregular-shaped drill bit according to claim 1, characterized in that: The drill body (2) has a second protrusion (22) at one end near the base (1). The first protrusion (21) is located on the drill body (2) via the second protrusion (22). The second protrusion (22) has a frustum structure. The diameter of the second protrusion (22) gradually decreases from the drill body (2) to the end near the base (1).

9. A multi-bladed irregular-shaped drill bit according to claim 8, characterized in that: The diameter of the end of the second protrusion (22) near the drill body (2) is not greater than the diameter of the end of the drill body (2) near the second protrusion (22).

10. A multi-bladed irregular-shaped drill bit according to claim 8, characterized in that: The base (1) is provided with a fourth groove for accommodating the second protrusion (22).

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