Alloy drill bit with chip breaker grooves

Abstract

The utility model discloses an alloy drill bit with a chip breaker groove, which comprises a fixed seat, an alloy drill bit, the chip breaker groove and a feeding mechanism, the alloy drill bit is arranged on the fixed seat, the chip breaker groove is arranged on the side wall of the alloy drill bit, and the fixed seat is connected onto the feeding mechanism. The four-direction linkage supporting structure has the advantages that by arranging the four-direction linkage supporting structure, the drill bit can achieve multi-dimensional stress balance in the machining process, local loads of traditional single-point supporting such as an air cylinder telescopic rod are effectively dispersed, the contact area of the drill bit and a workpiece is increased to be multiple times of that of a traditional structure, and the machining efficiency of the drill bit is improved. According to the design, a closed-loop rigid frame is formed through the four symmetrically-distributed supporting points, radial vibration caused by cutting force fluctuation in the machining process is remarkably restrained, the dynamic deflection amplitude of the drill bit is greatly reduced, and the drill bit is particularly suitable for a high-precision deep hole machining scene; a traditional independent driving mode of an air cylinder or a hydraulic cylinder is replaced.

Description

Technical Field

[0001] This utility model relates to an alloy drill bit, specifically an alloy drill bit with chip breaking grooves, belonging to the field of alloy drill bit technology. Background Technology

[0002] In the field of modern machining, the efficiency and precision of drilling processes are directly affected by the design of the cutting tool structure. When traditional drills are used to process high-toughness materials (such as stainless steel and titanium alloys), the continuous long chips generated during the cutting process are difficult to break effectively, which can easily lead to problems such as chip entanglement in the tool and blockage of the chip breaker groove. This not only reduces machining efficiency, but also causes a sudden rise in tool temperature, accelerated edge wear, and even scratches on the workpiece surface or uncontrolled machining vibration. To solve this industry pain point, alloy drills with chip breaker groove structures have emerged. This design uses grooves of a specific geometry near the cutting edge of the drill to force the chips to curl and break in the early stage of their formation, thereby significantly improving chip removal performance, extending tool life, and enhancing machining stability.

[0003] However, existing alloy drill bits still have various problems. For example, in an aluminum alloy composite drill with stepped chip breakers disclosed in publication number CN216096579U, although the stepped chip breakers with smaller radii of curvature are used to ensure that aluminum chips can first be curled in the stepped chip breakers before flowing into the main chip discharge groove, and the chip curling force is greatly increased, so that the aluminum chips quickly exceed their limit stress value and break, preventing the ribbon-like aluminum chips from wrapping around the tool holder and scratching the hole wall, in this technical solution and most current alloy drill bits, such drill bits need to be used with external support structures (such as drilling jigs or machine tool slides) to achieve axial feed movement. Existing support mechanisms generally rely on cylinder drive systems to provide power. Specifically, the connection between the end of the cylinder extension rod and the drill bit support frame is a point contact or a small area surface contact. Because the contact area between the cylinder piston rod and the support structure is too small, micro vibrations are easily generated under intermittent cutting loads. The vibrations are transmitted to the drill bit through the support structure, causing deviations in the machined hole diameter, which in turn seriously affects the machining accuracy. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings of existing technologies by proposing an alloy drill bit with chip breaking grooves.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A carbide drill bit with a chip breaker groove includes a fixed base, a carbide drill bit, a chip breaker groove, and a feed mechanism. The carbide drill bit is mounted on the fixed base, the chip breaker groove is mounted on the side wall of the carbide drill bit, and the fixed base is connected to the feed mechanism.

[0007] The feeding mechanism includes a support tray, a chassis, a first support rod, a second support rod, and a linkage unit. The fixed seat is connected to the top of the support tray, and the chassis is located at the bottom of the support tray. One end of the first support rod and the second support rod are rotatably connected to each other, and the other end of the first support rod is rotatably connected to the bottom of the support tray. The second support rod is rotatably connected to the chassis, and the linkage unit is located between the support tray and the chassis.

[0008] As a further embodiment of this utility model: the linkage unit includes a docking seat and a lead screw, and the rotating connection ends of the first support rod and the second support rod are provided with threaded holes. One end of the first support rod is rotatably connected to the docking seat, and the other end is threaded into the threaded hole.

[0009] As a further embodiment of this utility model: the linkage unit further includes a linkage bevel gear and a driving bevel gear. The linkage bevel gear is rotatably connected in the docking seat, and one end of the lead screw is coaxially fixed on the linkage bevel gear. The overall structure formed by the linkage bevel gear and the lead screw is symmetrically arranged in at least four sets on the docking seat, and adjacent linkage bevel gears mesh with each other.

[0010] As a further embodiment of this utility model: the linkage unit also includes a transmission rod and a servo motor. One end of the transmission rod is coaxially fixed on the active bevel gear, and the other end is coaxially connected to the output shaft of the servo motor. The servo motor is fixed at the center of the chassis.

[0011] As a further embodiment of this utility model: a cylindrical cavity is provided at the center of the output shaft of the servo motor, and a protrusion is provided on the inner wall of the cavity. The transmission rod is slidably fitted in the cylindrical cavity, and a groove is provided on the outer wall of the transmission rod, with the protrusion slidably engaged in the groove.

[0012] As a further improvement of this utility model, the fixed base, the support plate, and the fixed base and the alloy drill bit are all detachably connected by screws.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, by setting a four-way linkage support structure, the drill bit can achieve multi-dimensional force balance during processing, effectively dispersing the local load of traditional single-point supports, such as cylinder telescopic rods, and increasing the contact area between the drill bit and the workpiece to many times that of traditional structures. This design forms a closed-loop rigid frame through four symmetrically distributed support points, which significantly suppresses radial vibration caused by cutting force fluctuations during processing, greatly reducing the dynamic runout amplitude of the drill bit. It is especially suitable for high-precision deep hole processing scenarios. Furthermore, the synchronous linkage of the four-way support structure is driven by a gear set, replacing the independent drive method of traditional cylinders or hydraulic cylinders, and realizing integrated adjustment of feed motion. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the alloy drill bit and its connection structure according to the present invention;

[0017] Figure 3 This is a schematic diagram of the feeding mechanism structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the transmission rod and its overall connection structure of this utility model.

[0019] In the diagram: 1. Fixed base, 2. Carbide drill bit, 3. Chip breaker groove, 4. Feed mechanism, 41. Support plate, 42. Chassis, 43. First support rod, 44. Second support rod, 45. Connecting seat, 46. Lead screw, 47. Linkage bevel gear, 48. Drive bevel gear, 49. Transmission rod, 410. Servo motor. Detailed Implementation

[0020] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0021] like Figures 1 to 4 As shown, an alloy drill bit with a chip breaker groove includes a fixed base 1, an alloy drill bit 2, a chip breaker groove 3, and a feed mechanism 4. The alloy drill bit 2 is mounted on the fixed base 1, the chip breaker groove 3 is mounted on the side wall of the alloy drill bit 2, and the fixed base 1 is connected to the feed mechanism 4.

[0022] The feeding mechanism 4 includes a support tray 41, a base 42, a first support rod 43, a second support rod 44, and a linkage unit. The fixed seat 1 is connected to the top of the support tray 41, the base 42 is located at the bottom of the support tray 41, one end of the first support rod 43 and the second support rod 44 are rotatably connected to each other, the other end of the first support rod 43 is rotatably connected to the bottom of the support tray 41, the second support rod 44 is rotatably connected to the base 42, and the linkage unit is located between the support tray 41 and the base 42.

[0023] The linkage unit includes a docking seat 45 and a lead screw 46. The rotating connection ends of the first support rod 43 and the second support rod 44 are provided with threaded holes. One end of the first support rod 43 is rotatably connected to the docking seat 45, and the other end is threaded into the threaded hole.

[0024] The linkage unit also includes a linkage bevel gear 47 and a driving bevel gear 48. The linkage bevel gear 47 is rotatably connected in the docking seat 45, and one end of the lead screw 46 is coaxially fixed on the linkage bevel gear 47. The overall structure formed by the linkage bevel gear 47 and the lead screw 46 is symmetrically arranged in at least four sets on the docking seat 45, and adjacent linkage bevel gears 47 mesh with each other.

[0025] In this invention, by setting a four-way linkage support structure, the drill bit can achieve multi-dimensional force balance during processing, effectively dispersing the local load of traditional single-point supports, such as cylinder telescopic rods, and increasing the contact area between the drill bit and the workpiece to many times that of traditional structures. This design forms a closed-loop rigid frame through four symmetrically distributed support points, which significantly suppresses radial vibration caused by cutting force fluctuations during processing, greatly reducing the dynamic runout amplitude of the drill bit. It is especially suitable for high-precision deep hole processing scenarios. Furthermore, the synchronous linkage of the four-way support structure is driven by a gear set, replacing the independent drive method of traditional cylinders or hydraulic cylinders, and realizing integrated adjustment of feed motion. Example 2

[0026] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0027] The linkage unit also includes a transmission rod 49 and a servo motor 410. One end of the transmission rod 49 is coaxially fixed on the active bevel gear 48, and the other end is coaxially connected to the output shaft of the servo motor 410. The servo motor 410 is fixed at the center of the chassis 42. The servo motor 410 drives the transmission rod 49 to rotate, which in turn drives the active bevel gear 48 to rotate synchronously, and makes the linkage bevel gear 47 mesh and link together.

[0028] The output shaft of the servo motor 410 has a cylindrical cavity at its center and a protrusion on the inner wall of the cavity. The transmission rod 49 is slidably fitted in the cylindrical cavity and has a groove on the outer wall of the transmission rod 49. The protrusion is slidably engaged in the groove. Through the mutual cooperation between the groove and the protrusion, the transmission rod 49 can slide on the output shaft and rotate synchronously with the output shaft.

[0029] The fixed base 1, the support plate 41, and the fixed base 1 and the alloy drill bit 2 are all detachably connected by screws, allowing the alloy drill bit 2 to be quickly assembled and disassembled.

[0030] Working principle: When using this alloy drill bit, first lock the alloy drill bit 2 to be processed into the fixed seat 1 with screws, then lock the fixed seat 1 onto the support plate 41 with screws. Then, drive the transmission rod 49 to rotate through the servo motor 410. At this time, the active bevel gear 48 rotates synchronously and drives the linkage bevel gear 47 to mesh and link. At this time, the linkage bevel gear 47 drives the lead screw 46 to rotate, thereby making the threaded connection between the first support rod 43 and the second support rod 44 linked, and thus enabling the rapid adjustment of the height of the alloy drill bit 2.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] 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 carbide drill bit with a chip breaker groove, comprising a fixed base (1), a carbide drill bit (2), a chip breaker groove (3), and a feed mechanism (4), characterized in that, The alloy drill bit (2) is mounted on the fixed base (1), the chip breaker (3) is mounted on the side wall of the alloy drill bit (2), and the fixed base (1) is connected to the feed mechanism (4). The feeding mechanism (4) includes a support tray (41), a chassis (42), a first support rod (43), a second support rod (44), and a linkage unit. The fixed seat (1) is connected to the top of the support tray (41), and the chassis (42) is set at the bottom of the support tray (41). One end of the first support rod (43) and the second support rod (44) are rotatably connected to each other. The other end of the first support rod (43) is rotatably connected to the bottom of the support tray (41), and the second support rod (44) is rotatably connected to the chassis (42). The linkage unit is set between the support tray (41) and the chassis (42).

2. The alloy drill bit with chip breaker groove according to claim 1, characterized in that: The linkage unit includes a docking seat (45) and a lead screw (46). The rotating connection ends of the first support rod (43) and the second support rod (44) are provided with threaded holes. One end of the first support rod (43) is rotatably connected to the docking seat (45), and the other end is threaded into the threaded hole.

3. The alloy drill bit with chip breaker groove according to claim 2, characterized in that: The linkage unit also includes a linkage bevel gear (47) and a drive bevel gear (48). The linkage bevel gear (47) is rotatably connected in the docking seat (45), and one end of the lead screw (46) is coaxially fixed on the linkage bevel gear (47). The overall structure formed by the linkage bevel gear (47) and the lead screw (46) is symmetrically arranged in at least four sets on the docking seat (45), and two adjacent linkage bevel gears (47) mesh with each other.

4. The alloy drill bit with chip breaker groove according to claim 3, characterized in that: The linkage unit also includes a transmission rod (49) and a servo motor (410). One end of the transmission rod (49) is coaxially fixed on the active bevel gear (48), and the other end is coaxially connected to the output shaft of the servo motor (410). The servo motor (410) is fixed at the center of the chassis (42).

5. An alloy drill bit with chip breaker grooves according to claim 4, characterized in that: The output shaft of the servo motor (410) has a cylindrical cavity at its center and a protrusion on the inner wall of the cavity. The transmission rod (49) is slidably fitted in the cylindrical cavity and has a groove on the outer wall of the transmission rod (49). The protrusion is slidably engaged in the groove.

6. The alloy drill bit with chip breaker groove according to claim 1, characterized in that: The fixed seat (1), the bearing plate (41), and the fixed seat (1) and the alloy drill bit (2) are all detachably connected by screws.

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