A cutting tool for machining and forming a deep core

Abstract

The present invention discloses a tool for machining and forming a deep bone cavity core. The top of the drill bit body is a tool shank, and a double - helix chip - discharging groove is provided at the bottom. The outer edges of the bottoms of the two chip - discharging grooves are protruding cutting edges, and the bottoms of the two cutting edges are connected by a transverse edge. The orthographic projection of the bottom of the drill bit body is arc - shaped, and the edge of the orthographic projection of the bottom of the drill bit body is inclined with respect to its axis. The bottom of the tool shank is cylindrical, and the bottom is hexagonal prism - shaped. The present invention can perform cutting processing on the workpiece while rotating and feeding, avoiding the inconvenience of traditional spark - machine forming processing. During the rotation process, the fan blades that move circumferentially synchronously can continuously blow the chips generated by the cutting below without stopping the tool feeding, thereby preventing the chips from staying on the surface of the workpiece or on the tool's travel route and affecting the cutting processing of the tool. When the rotation speed of the tool changes between low speed and high speed.

Description

Technical Field

[0001] The present invention relates to the field of machining, and particularly to a tool for machining and forming a deep rib core Background Art

[0002] In the traditional forming machining method of the deep rib core in a washing machine drum mold, it is usually processed by using a designed forming electrode for EDM discharge. This processing method mainly includes four stages. The first stage: using CNC machining to partially form the height of the deep rib core; the second stage: designing a forming electrode according to the shape of the rib; the third stage: using CNC to form and machine the forming electrode; the fourth stage: using a spark machine to perform all-feature forming discharge machining on the deep rib core. This method not only has a large number of processes, high costs, and a long processing cycle, but also is prone to quality problems and is difficult to meet the high-efficiency and high-quality requirements of customers. Although some tools currently used that can directly perform cutting and forming can discharge the cutting debris through the chip evacuation grooves of the tool itself, these debris are still likely to fall on the surface of the workpiece to be machined or in the grooves that have been rough machined after flying out, which will also have an adverse impact on the next cutting and finishing processes. The solution is generally to use compressed air to blow the debris in a timely manner, which requires temporarily stopping the feed of the tool, thus increasing the processing time and reducing the processing efficiency. If cutting fluid is used to assist in chip evacuation during the entire cutting process, it will cause certain pollution due to the recycling and treatment of the cutting fluid, highlighting its deficiencies. Summary of the Invention

[0003] The purpose of the present invention is to provide a tool for machining and forming a deep rib core to solve the above technical problems.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A tool for machining and forming a deep rib core includes a drill bit body, a tool shank, chip evacuation grooves, cutting edges, chisel edges, and a blowing part. The top of the drill bit body is the tool shank, and the bottom is provided with double-helix chip evacuation grooves. The outer edges of the bottoms of the two chip evacuation grooves are protruding cutting edges, and the bottoms of the two cutting edges are connected by a chisel edge. The orthographic projection of the bottom of the drill bit body is arc-shaped, and the edge of the orthographic projection of the bottom of the drill bit body is inclined with respect to its axis. The bottom of the tool shank is cylindrical and the bottom is hexagonal prism-shaped. The middle and upper part of the tool shank is cylindrical, and the outer wall of the middle part is provided with an external thread. The tool shank is equipped with a blowing part.

[0006] On the basis of the above technical solution, the blowing part includes a support base, a support cylinder, a support shaft, a swing arm, a fan blade, a swing rod, a transmission base, a transmission groove, a limiting ring, a force-receiving platform, a transmission cylinder, a transmission disk, and a pendulum. A vertical support base is inserted at the bottom of the tool handle. A vertical support cylinder is fixed to the upper part of the support base. A plurality of support shafts are rotatably connected to the outer circumference of the support base at equal angles. The outermost ends of the support shafts are respectively radially fixed with swing arms. Each swing arm is respectively fixed with a horizontal fan blade, and a horizontal swing rod is respectively fixed to the upper part. The support cylinder is a hexagonal prism-shaped cylinder structure. A vertical transmission base is slidably connected to the support cylinder. A plurality of transmission grooves inclined to the bottom end surface of the transmission base are opened at equal angles on the circumference of the bottom of the transmission base. A limiting ring is threadedly connected to the middle of the tool handle. A flat force-receiving platform is provided on each of the left and right parts of the limiting ring. A vertical transmission cylinder is rotatably connected to the upper part of the transmission base. A transmission disk is fixed to the top end of the transmission cylinder. A radial pendulum is fixed to the outer circumferential wall of the transmission disk and is threadedly connected to the tool handle.

[0007] On the basis of the above technical solution, each swing rod is slidably connected to the transmission groove. The transmission groove is inclined in the spiral direction of the chip removal groove. The transmission base can slide up and down along the support cylinder. The bottom end of the limiting ring abuts against the top end of the support cylinder. The two force-receiving platforms are parallel to each other.

[0008] Compared with the prior art, the present invention has the following advantages: The present invention can perform cutting processing on the workpiece while rotating and feeding, avoiding the inconvenience of traditional spark machine forming processing. During the rotation process, the fan blades that move circumferentially synchronously can continuously blow the chips generated by the cutting below without stopping the tool feeding, thereby preventing the chips from staying on the surface of the workpiece or on the tool's travel route and affecting the cutting processing of the tool. When the rotation speed of the tool changes between low speed and high speed, the torsion angle of the fan blades can be adjusted adaptively, so that the wind speed will not be too high at high speeds, thereby avoiding adverse effects such as accidental injury and wear of the processing device caused by excessive splashing of cutting chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic structural diagram of the present invention.

[0010] Figure 2 It is a schematic structural diagram of the drill bit body and the tool handle of the present invention.

[0011] Figure 3 It is a bottom view schematic diagram of the drill bit body of the present invention.

[0012] Figure 4 It is a schematic diagram of the cooperation between the transmission base and the support cylinder of the present invention.

[0013] In the figure: 1. Drill bit body, 2. Tool shank, 3. Chip flute, 401. Cutting edge, 402. Chisel edge, 5. Blowing part, 6. Support base, 7. Support cylinder, 8. Support shaft, 9. Swing arm, 10. Fan blade, 11. Swing rod, 12. Transmission base, 13. Transmission groove, 14. Limit ring, 15. Force-receiving platform, 16. Transmission cylinder, 17. Transmission disc, 18. Pendulum hammer. Detailed implementation mode

[0014] The present invention will be further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] As Figures 1-4 shown, a tool for processing and forming a deep bone position core includes a drill bit body 1, a tool shank 2, a chip flute 3, a cutting edge 401, a chisel edge 402, and a blowing part 5. The top of the drill bit body 1 is the tool shank 2, and a double-helix chip flute 3 is provided at the bottom. The outer edges of the bottoms of the two chip flutes 3 are protruding cutting edges 401. The bottoms of the two cutting edges 401 are connected by a chisel edge 402. The orthographic projection of the bottom of the drill bit body 1 is arc-shaped. The edge of the orthographic projection of the bottom of the drill bit body 1 is inclined with respect to its axis. Taking the forming of the deep bone position core of the M20H415-B0302 washing machine drum mold as an example, the radius of the arc of the orthographic projection of the bottom of the drill bit body 1 is 2 mm, and the included angle between the edge of the orthographic projection of the bottom of the drill bit body 1 and its axis is 0.5 degrees. The bottom of the tool shank 2 is cylindrical and the bottom is hexagonal. The middle and upper parts of the tool shank 2 are cylindrical, and an external thread is provided on the outer wall of the middle part. The tool shank 2 is equipped with a blowing part 5.

[0016] The blowing part 5 includes a support base 6, a support cylinder 7, a support shaft 8, a swing arm 9, a fan blade 10, a swing rod 11, a transmission base 12, a transmission groove 13, a limiting ring 14, a force-receiving platform 15, a transmission cylinder 16, a transmission disk 17, and a pendulum 18. A vertical support base 6 is inserted into the bottom of the tool handle 2. A vertical support cylinder 7 is fixed to the upper part of the support base 6. A plurality of support shafts 8 are rotatably connected to the outer circumference of the support base 6 at equal angles. The outermost ends of the support shafts 8 are respectively fixed with radial swing arms 9. Each of the swing arms 9 is fixed with a horizontal fan blade 10 and is respectively fixed with a horizontal swing rod 11 at the upper part. The support cylinder 7 is a hexagonal prism-shaped cylinder structure. A vertical transmission base 12 is slidably connected to the support cylinder 7. A plurality of transmission grooves 13 inclined to the bottom end surface of the transmission base 12 are formed at equal angles on the bottom circumference of the transmission base 12. A limiting ring 14 is threadedly connected to the middle of the tool handle 2. Flat force-receiving platforms 15 are provided on the left and right sides of the limiting ring 14. The mutually parallel force-receiving platforms 15 can make the limiting ring 14 better clamped by tools such as a handle, thereby facilitating installation and disassembly. A vertical transmission cylinder 16 is rotatably connected to the upper part of the transmission base 12. A transmission disk 17 is fixed to the top end of the transmission cylinder 16. A radial pendulum 18 is fixed to the outer circumferential wall of the transmission disk 17 and is threadedly connected to the tool handle 2. The pendulum 18 is used to enhance the effect of inertial motion.

[0017] Each of the swing rods 11 is slidably connected to the transmission groove 13. The transmission groove 13 is inclined in the spiral direction of the chip removal groove 3. The transmission base 12 can slide up and down along the support cylinder 7. The bottom end of the limiting ring 14 abuts against the top end of the support cylinder 7. The two force-receiving platforms 15 are parallel to each other.

[0018] Working principle of the present invention: Determine the rotational speed of the tool when rotating according to the material of the deep rib core, and select a tool with a suitable size according to the height, width, draft angle, and root fillet of the deep rib core. Subsequently, write a numerical control program to machine and form using a CNC. When looking down at the angle when the tool rotates from rest to a low speed counterclockwise, since the transmission disc 17 is threadedly connected to the tool shank 2, and the transmission cylinder 16 is rotatably connected to the transmission seat 12, the time taken for the pendulum 18 to accelerate from rest to the same speed as the drill bit body 1 is relatively short. Therefore, the time for the transmission disc 17 and the tool shank 2 to generate thread transmission at this time is relatively short, and the distance that the transmission disc 17 rises relative to the tool shank 2 is relatively short. Thus, a slight reduction in the torsion angle of the fan blade 10 is achieved by using the sliding connection between the transmission groove 13 and the swing rod 11. As the rotational speed of the tool increases, the time taken for the pendulum 18 to accelerate from rest to the same speed as the drill bit body 1 is relatively long. Therefore, the time for the transmission disc 17 and the tool shank 2 to generate thread transmission at this time is relatively long, and the distance that the transmission disc 17 rises relative to the tool shank 2 is relatively long. Thus, a large reduction in the torsion angle of the fan blade 10 is achieved by using the sliding connection between the transmission groove 13 and the swing rod 11. That is, a large torsion angle in the low-speed state and a small torsion angle in the high-speed state. In this way, while ensuring that the fan blade 10 generates sufficient wind during rotation to blow the debris generated by the cutting below to effectively clean the debris, it can also avoid excessive splashing of the debris caused by excessive wind speed during high-speed rotation.

[0019] The above is a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principle and spirit of the present invention, the changes, modifications, substitutions, and variations made to the implementation manners still fall within the protection scope of the present invention.

Claims

1. A cutting tool for machining and forming a deep bone cavity core, comprising a drill bit body (1), a tool shank (2), a chip fluting (3), a cutting edge (401), a chisel edge (402), and a blowing part (5), characterized in that: The top of the drill bit body (1) is a tool shank (2), and a double - helix chip - discharging groove (3) is provided at the bottom. The outer edges of the bottoms of the two chip - discharging grooves (3) are protruding cutting edges (401). The bottoms of the two cutting edges (401) are connected by a web (402). The orthographic projection of the bottom of the drill bit body (1) is arc - shaped. The edge of the orthographic projection of the bottom of the drill bit body (1) is inclined with respect to its axis. The bottom of the tool shank (2) is cylindrical and the bottom is hexagonal prism - shaped. The middle and upper part of the tool shank (2) is cylindrical, and an external thread is provided on the outer wall of the middle part. A blowing part (5) is installed on the tool shank (2). The blowing part (5) includes a support base (6), a support cylinder (7), a support shaft (8), a swing arm (9), a fan blade (10), a swing rod (11), a transmission base (12), a transmission groove (13), a limit ring (14), a force - receiving platform (15), a transmission cylinder (16), a transmission disc (17), and a pendulum (18). A vertical support base (6) is inserted into the bottom of the tool shank (2). A vertical support cylinder (7) is fixed to the upper part of the support base (6). A plurality of support shafts (8) are rotatably connected to the outer circumference of the support base (6) at equal angles. The outermost ends of the respective support shafts (8) are radially fixed with swing arms (9). Each of the swing arms (9) is fixed with a horizontal fan blade (10), and a horizontal swing rod (11) is fixed to the upper part respectively. The support cylinder (7) is a hexagonal - prism - shaped cylindrical structure. A vertical transmission base (12) is slidably connected to the support cylinder (7). A plurality of transmission grooves (13) inclined to the bottom end surface of the transmission base (12) are formed at equal angles on the bottom circumference of the transmission base (12). A limit ring (14) is threadedly connected to the middle part of the tool shank (2). A flat force - receiving platform (15) is provided on each of the left and right parts of the limit ring (14). A vertical transmission cylinder (16) is rotatably connected to the upper part of the transmission base (12). A transmission disc (17) is fixed to the top end of the transmission cylinder (16). A radial pendulum (18) is fixed to the outer circumferential wall of the transmission disc (17) and is threadedly connected to the tool shank (2).

2. The cutting tool for machining and forming a deep core according to claim 1, wherein: Each of the swing rods (11) is slidably connected to the transmission groove (13). The transmission groove (13) is inclined in the spiral direction of the chip - discharging groove (3). The transmission base (12) can slide up and down along the support cylinder (7). The bottom end of the limit ring (14) abuts tightly against the top end of the support cylinder (7). The two force - receiving platforms (15) are parallel to each other.

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