Copper piece machining drill bit

Abstract

The utility model belongs to the technical field of copper piece machining equipment, and particularly relates to a copper piece machining drill bit which comprises a drill bit body, the drill bit body is composed of a working part, a damping part and a handle part, the working part is provided with a spiral groove and a drill tip, the drill tip is provided with a cutting edge, and the damping part comprises an assembly hole, a center shaft and a damping assembly. The damping assembly comprises a semicircular sliding groove, a damping column, a spring and a positioning column, damping grease is filled in the semicircular sliding groove, annular chip breaking bosses are arranged on the inner wall of the spiral groove in a staggered mode, and the center shaft is in interference fit with the assembly hole. The control precision of the drilling depth and the hole diameter is greatly improved, the high-precision copper piece machining requirement is met, cutting edge abrasion is reduced, the service life of the drill bit is prolonged, the machining cost is reduced, the machining efficiency and quality are further improved, and remarkable practical value is achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of copper processing equipment, specifically a copper processing drill bit. Background Technology

[0002] Copper parts are relatively soft, and drill bits are often used for processing them. Copper drill bits are mostly made of high-speed steel, which has good toughness and can prevent chipping. Their cutting edges are specially polished to fit different specifications of copper materials and are widely used in the processing of copper parts in electronic and electrical industries.

[0003] Existing drill bits typically consist of a shank, neck, cutting edge, and chip flute. Their working principle is as follows: by rotating the drill bit, the cutting edge contacts the workpiece surface and generates cutting force, removing the material to form chips, which are then discharged along the chip flute.

[0004] The existing technology for copper part processing equipment has the following drawbacks: Axial vibration of the drill bit is a significant issue during copper part processing, negatively impacting various aspects of the process. In terms of processing accuracy, vibration causes irregular displacement of the drill tip in the axial direction, making it difficult to precisely control the drilling depth and diameter. For example, when drilling high-precision electronic copper parts, even slight axial vibration can cause the hole diameter deviation to exceed design requirements, affecting product performance and quality. Regarding surface quality, vibration leaves irregular marks on the copper part surface, increasing surface roughness and reducing surface finish. Furthermore, axial vibration accelerates cutting edge wear, significantly shortening the drill bit's lifespan. Therefore, this paper proposes a copper part processing drill bit to address these issues. Utility Model Content

[0005] To address the shortcomings in the existing technology of copper processing equipment, a copper processing drill bit is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The copper part processing drill bit of this utility model includes a drill bit body, the drill bit body includes a working part, a damping part and a shank part, the working part is provided with a spiral groove, the working part is provided with a drill tip at the first end of the spiral groove, the drill tip is provided with a cutting edge, the damping part includes an assembly hole opened on the drill bit body, a central shaft is assembled in the assembly hole, a plurality of damping components are provided on the central shaft, and the shank part is welded and fixed to the damping part.

[0007] Preferably, the damping assembly includes semi-circular grooves arranged in an equidistant array around the central axis, a damping column is slidably mounted in the semi-circular groove, and springs are connected to both ends of the damping column and the semi-circular groove. Positioning posts for positioning the springs are provided at both ends of the damping column and the semi-circular groove.

[0008] Preferably, the outer diameter of the central shaft is 0.01 to 0.05 mm larger than the inner diameter of the assembly hole, and it is assembled by interference fit after being pressed in by a press or heated and expanded.

[0009] Preferably, the semi-circular groove is filled with damping grease.

[0010] Preferably, the inner wall of the spiral groove is provided with a plurality of annular chip-breaking protrusions arranged alternately.

[0011] The beneficial effects of this utility model are:

[0012] This invention provides a drill bit for machining copper parts. Through a damping component, it effectively absorbs and buffers axial vibration energy, making the axial displacement of the drill tip more stable during the cutting process. This greatly improves the control accuracy of drilling depth and diameter, meeting the requirements of high-precision machining of copper parts. It is especially suitable for machining copper parts in fields with stringent dimensional accuracy requirements, such as electronics and aerospace. It effectively reduces the impact of axial vibration on the cutting edge, significantly reducing the wear rate of the cutting edge. Compared with traditional drill bits, the service life of this invention is greatly extended, reducing tool replacement frequency, lowering processing costs, and improving production efficiency. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0014] Figure 1 This is a perspective view of the entire utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Legend:

[0017] 1. Drill bit body; 101. Working part; 102. Damping part; 1021. Assembly hole; 1022. Central shaft; 103. Shank; 2. Spiral groove; 3. Drill tip; 4. Damping assembly; 401. Semi-circular groove; 402. Damping post; 403. Spring; 404. Positioning post; 5. Annular chip breaking boss. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] Specific implementation examples are given below.

[0020] Please see Figures 1-2The present invention discloses a copper machining drill bit, comprising a drill bit body 1, wherein the drill bit body 1 includes a working part 101, a damping part 102, and a shank 103. The working part 101 has a helical groove 2, and a drill tip 3 is provided at the first end of the helical groove 2. The drill tip 3 has a cutting edge. The damping part 102 includes an assembly hole 1021 on the drill bit body 1, in which a central shaft 1022 is assembled. A plurality of damping components 4 are provided on the central shaft 1022. The shank 103 is welded and fixed to the damping part 102. Each damping component 4 includes a semi-circular sliding groove 401 arranged in an annular equidistant array around the central shaft 1022, and a sliding assembly within the semi-circular sliding groove 401. Equipped with damping columns 402, each end of the damping column 402 is connected to a spring 403 between its two ends and the semi-circular groove 401. Positioning columns 404 for positioning the springs 403 are provided at both ends of the damping column 402 and the semi-circular groove 401. During operation, in the machining process, the shank 103 is connected to the power output shaft of the machine tool. The torque generated by the machine tool's operation is transmitted through the shank 103 to the entire drill body 1, causing it to rotate at high speed. The drill tip 3 of the working part 101 contacts the surface of the copper workpiece. Due to the high-speed rotation of the drill body 1, the cutting edge generates a strong cutting force on the copper workpiece, gradually removing the copper material and forming chips. Under the centrifugal force generated by the rotation of the drill bit and the guiding action of the spiral groove 2, the chips are discharged along the spiral groove 2 towards the shank 103. When the drill bit... When axial vibration occurs due to various factors during the cutting of copper parts, the entire drill bit body 1 will undergo displacement and vibration in the axial direction. The axial vibration of the central shaft 1022 will cause the damping column 402 to slide axially within the semi-circular groove 401. When the central shaft 1022 vibrates upward, the damping column 402 will slide downward relative to it under the action of inertia. At this time, the upper spring 403 is stretched and the lower spring 403 is compressed. The spring 403 will store elastic potential energy during the stretching and compression process. Conversely, when the central shaft 1022 vibrates downward, the damping column 402 will slide upward relative to it. The upper spring 403 is compressed and the lower spring 403 is stretched. This elastic deformation process of the spring 403 actually converts the kinetic energy of the drill bit's axial vibration into the elasticity of the spring. Potential energy, through the continuous stretching and compression of spring 403, gradually consumes and absorbs the energy of vibration, thereby playing a role in buffering and suppressing axial vibration. At the same time, due to the sliding of damping column 402 in semi-circular groove 401, it will be subject to a certain friction force, which will also consume some vibration energy, further enhancing the damping effect. This utility model, through the effective absorption and buffering of axial vibration energy by damping component 4, makes the axial displacement of drill tip 3 more stable during the cutting process, enabling more precise control of drilling depth and diameter during drilling, greatly improving machining accuracy. Secondly, it reduces the impact of axial vibration on the cutting edge, reduces the wear rate of the cutting edge, extends the service life of the drill bit, and facilitates the normal formation and removal of chips.

[0021] Furthermore, the outer diameter of the central shaft 1022 is 0.01 to 0.05 mm larger than the inner diameter of the mounting hole 1021. It is assembled by pressing with a press or by heating and expanding to achieve an interference fit. During operation, when assembled by pressing with a press, the central shaft 1022 is forcibly pressed into the mounting hole 1021 under the strong pressure of the press. Since the outer diameter of the central shaft 1022 is slightly larger than the inner diameter of the mounting hole 1021, the central shaft 1022 will generate radial pressure on the hole wall of the mounting hole 1021 during the pressing process. This pressure will cause elastic deformation of the hole wall material of the mounting hole 1021. At the same time, the central shaft 1022 itself will also undergo a certain degree of elastic compression. When the central shaft 1022 is completely pressed into the mounting hole 1021, the elastic restoring force of the hole wall material will tightly hold the central shaft 1022 in place. 022, thus generating a large frictional force between the two; while the heating expansion assembly method utilizes the principle of thermal expansion and contraction of materials. First, the drill bit body 1 is heated to increase its temperature. As the temperature rises, the drill bit body 1, including the assembly hole 1021, will expand, and the inner diameter of the assembly hole 1021 will increase. At this time, the room temperature center shaft 1022 is placed into the expanded assembly hole 1021. After the drill bit body 1 cools and shrinks, the inner diameter of the assembly hole 1021 returns to its original size. However, since the outer diameter of the center shaft 1022 is larger than the original inner diameter of the assembly hole 1021, the assembly hole 1021 will tightly clamp the center shaft 1022, which also generates a strong frictional force between the two. The stable connection structure helps to improve the damping effect and further reduce the axial vibration amplitude of the drill bit.

[0022] Furthermore, the semi-circular groove 401 is filled with damping grease. During operation, when the damping column 402 slides axially within the semi-circular groove 401 due to axial vibration, the damping grease exerts multiple effects on the movement of the damping column 402. The high viscosity of the damping grease means that the damping column 402 needs to overcome greater resistance during sliding, resulting in strong viscous friction between the damping column 402 and the damping grease. This friction is in the opposite direction to the sliding direction of the damping column 402, thus hindering its rapid sliding. Secondly, when the damping column 402 slides within the semi-circular groove 401, it compresses and agitates the damping grease. During this process... Complex viscous flow occurs inside the damping grease, which consumes a large amount of energy. This energy comes from the axial vibration of the drill bit. Through the viscous flow of the damping grease, the energy of the axial vibration is converted into heat and dissipated, thereby further enhancing the suppression effect on axial vibration. In addition, the damping grease can also form a lubricating film on the contact surface between the damping column 402 and the semi-circular groove 401. This lubricating film can reduce the mechanical wear between the damping column 402 and the semi-circular groove 401, reduce the coefficient of friction between them, and ensure that the damping column 402 can slide smoothly in the semi-circular groove 401, so that the damping assembly 4 can work stably for a long time.

[0023] Furthermore, the inner wall of the spiral groove 2 is provided with a plurality of annular chip-breaking protrusions 5 in an alternating manner. During operation, when the chip moves through the spiral groove 2 and passes the annular chip-breaking protrusions 5, the chip comes into contact with the annular chip-breaking protrusions 5. The annular chip-breaking protrusions 5 will exert a squeezing and obstructing effect on the chip. When the chip comes into contact with the annular chip-breaking protrusions 5, it will be blocked by the protrusions, causing the chip's direction of travel to change. As the chip continues to move forward, it will break into small segments at this part. These small chip segments are more easily discharged in the spiral groove 2, reducing the possibility of chip entanglement and blockage, and ensuring smooth chip discharge.

[0024] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A copper piece processing drill bit, characterized by: The application relates to a drill bit body (1) comprising a working part (101), a damping part (102) and a handle part (103), a spiral groove (2) is formed on the working part (101), a drill tip (3) is arranged at the head end of the spiral groove (2), the drill tip (3) is provided with a cutting edge, the damping part (102) comprises an assembly hole (1021) formed on the drill bit body (1), a central shaft (1022) is assembled in the assembly hole (1021), a plurality of damping assemblies (4) are arranged on the central shaft (1022), and the handle part (103) is welded and fixed with the damping part (102).

2. The drill bit of claim 1, wherein: The damping assembly (4) comprises a semicircular sliding groove (401) which is formed in an annular equidistant array on the lateral side of the central shaft (1022), a damping column (402) is slidingly assembled in the semicircular sliding groove (401), springs (403) are arranged between the two ends of the damping column (402) and the semicircular sliding groove (401), and positioning columns (404) for positioning the springs (403) are arranged at the two ends of the damping column (402) and the semicircular sliding groove (401).

3. The drill bit of claim 1, wherein: The outer diameter of the central shaft (1022) is 0.01-0.05 mm larger than the inner diameter of the assembly hole (1021), and the assembly is achieved through interference fit after pressing by a press machine or heating expansion.

4. The drill bit of claim 2, wherein: The semicircular sliding groove (401) is filled with damping grease.

5. The drill bit of claim 1 wherein: A plurality of annular chip breaking convex bosses (5) are arranged on the inner wall of the spiral groove (2) in a staggered mode.

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