Stepped spiral milling cutter

Abstract

The utility model discloses a stepped spiral milling cutter, which relates to the technical field of spiral milling cutters and comprises a cutter handle, the bottom of the cutter handle is fixedly connected with a cutter neck, the bottom of the cutter neck is fixedly connected with a cutter shaft, and spiral grooves are arranged on the outer walls of the cutter shaft and the cutter neck and used for guiding chips. The outer wall of the knife handle is fixedly sleeved with the circular sleeve, the outer wall of the circular sleeve is rotationally sleeved with a rotating ring, and an elastic mechanism is arranged below the rotating ring; and the horizontal sliding mechanism is arranged outside the rotating ring, and the horizontal sliding mechanism is used for driving the square plate to move horizontally. The square plate is driven to descend while the cutter shaft descends for punching, the square plate abuts against the upper surface of a punched material and keeps static, the cutter shaft continues to rotate and moves downwards, punched cuttings are forcibly cut off by the square plate, the cuttings are prevented from winding a milling cutter, and in the process that the cutter shaft ascends after punching is completed, the cutter shaft is prevented from being damaged. The square plate rotates to sweep away cutting around the hole, and observation of workers is prevented from being affected.

Description

Technical Field

[0001] This utility model relates to the field of spiral milling cutter technology, and in particular to a stepped spiral milling cutter. Background Technology

[0002] A stepped spiral end mill is a special end mill design characterized by the distribution of the milling teeth on different radii of the cutter body, arranged in a stepped manner in both the radial and axial directions. This design allows the machining allowance of the workpiece to be evenly distributed across each tooth, thereby improving production efficiency and machining quality.

[0003] During the drilling process, stepped spiral end mills discharge the chips produced by drilling upwards through the spiral grooves. Due to the special design of the spiral grooves, the chips are usually spiral-shaped. As the stepped spiral end mill rotates, the chips are discharged from the hole. The stepped distribution of the end mill can easily disrupt the continuous discharge path of the chips, increase the risk of chip entanglement, affect the machining stability, and accumulate on the surface of the hole, affecting the worker's observation. Utility Model Content

[0004] The purpose of this invention is to provide a stepped spiral end mill to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stepped spiral end mill, comprising:

[0006] The tool holder has a blade neck fixedly connected to its bottom, and a blade shaft fixedly connected to its bottom. Both the blade shaft and the outer wall of the blade neck are provided with spiral grooves for chip guiding.

[0007] A circular sleeve is fixedly fitted onto the outer wall of the tool holder. A rotating ring is rotatably fitted onto the outer wall of the circular sleeve. An elastic mechanism is provided below the rotating ring, and a square plate is provided below the elastic mechanism.

[0008] A horizontal sliding mechanism is provided outside the rotating ring, and the horizontal sliding mechanism is used to drive the square plate to move horizontally.

[0009] The top of the tool holder has a connecting groove, the bottom of the tool shaft is fixedly connected to the tool head, and the outer wall of the tool shaft has a chip breaking opening, which is multiple and spaced vertically.

[0010] The horizontal sliding mechanism includes a slide rail, which is fixedly connected to the outer wall of the rotating ring. A slider is slidably connected to the inner wall of the slide rail, and the elastic mechanism is fixedly disposed at the bottom of the slider.

[0011] A trapezoidal block is fixedly installed at the bottom of the elastic mechanism, and a conical sleeve is fixedly sleeved at the bottom of the circular sleeve. The conical sleeve abuts against the trapezoidal block, and an elastic element is fixedly installed between the outer wall of the slider and the inner wall of the slide rail.

[0012] The elastic mechanism includes a spring, a circular rod is fixedly connected to the top of the trapezoidal block, the slider is slidably sleeved on the outer wall of the circular rod, and the spring is fixedly connected between the trapezoidal block and the slider.

[0013] A connecting rod is fixedly connected to the bottom of the trapezoidal block, and the square plate is fixedly connected to the bottom of the connecting rod. There are two square plates arranged horizontally and symmetrically. A brush is fixedly connected to the side of each square plate near the cutter shaft, and the end of the brush away from the square plate is in contact with the surface of the cutter shaft.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] This invention fixes the tool holder at the connection position of the milling machine. While the tool shaft descends to make a hole, it drives the square plate to descend as well. The square plate abuts against the upper surface of the material being punched and remains stationary, pressing against the elastic mechanism. The tool shaft continues to rotate and move downward. The chips that are punched out follow the rotation of the tool shaft until they are discharged through the spiral groove and come into contact with the square plate. The square plate presses and blocks the chips, preventing them from continuing to rotate and wrap around the milling cutter. Furthermore, during the process of the tool shaft rising after punching the hole, the square plate rotates and sweeps away the cutting material around the hole, preventing it from affecting the worker's observation. Attached Figure Description

[0016] Figure 1 This is a frontal three-dimensional structural diagram of the present utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the knife handle of this utility model.

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the square plate of this utility model.

[0019] In the diagram: 1. Tool holder; 2. Circular sleeve; 3. Conical sleeve; 4. Tool shaft; 5. Tool head; 6. Spiral groove; 7. Tool neck; 8. Chip breaker; 9. Rotating ring; 11. Spring; 10. Circular rod; 12. Connecting rod; 13. Square plate; 14. Brush; 15. Connecting groove; 16. Slider; 17. Slide rail; 18. Trapezoidal block. 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.

[0021] This utility model provides, for example Figures 1-3 The stepped spiral end mill shown includes a shank 1, a circular sleeve 2, and a horizontal sliding mechanism. A cutter neck 7 is fixedly connected to the bottom of the shank 1, and a cutter shaft 4 is fixedly connected to the bottom of the cutter neck 7. Both the cutter shaft 4 and the outer wall of the cutter neck 7 have spiral grooves 6 for chip guidance. The circular sleeve 2 is fixedly sleeved on the outer wall of the shank 1, and a rotating ring 9 is rotatably sleeved on the outer wall of the circular sleeve 2. An elastic mechanism is located below the rotating ring 9, and a square plate 13 is located below the elastic mechanism. The horizontal sliding mechanism is located outside the rotating ring 9 and is used to drive the square plate 13 to move horizontally. The shank 1 is fixedly installed at the milling machine connection position. When the milling machine is started, the milling machine connection mechanism drives the shank 1 to rotate and move downwards. The shank 1 drives the cutter shaft 4 to descend and drill, while the rotating ring 9 moves horizontally through the circular sleeve 2. As the cutter head descends, the cutter handle 1 drives the square plate 13 downward through the elastic mechanism. Simultaneously, the high-speed rotation of the cutter handle 1 causes the rotating ring 9 to follow suit at a certain speed until the bottom of the square plate 13 abuts against the top of the material being drilled. The square plate 13 then presses against the elastic mechanism, and the cutter shaft 4 continues to move downward to drill. The square plate 13 comes to a stop against the material being drilled, and the drilled chips are discharged from the spiral groove 6 and follow the rotation of the cutter shaft 4 until the chips contact the square plate 13. The cutter shaft 4 continues to rotate and cut, but is blocked by the square plate 13 and forcibly cut off, preventing chips from entangled in the milling cutter. During the upward movement of the cutter shaft 4 after drilling, the elastic mechanism resets, reducing the force pressing on the square plate 13. The square plate 13 rotates to sweep away the cutting material around the hole, preventing obstruction of the worker's observation.

[0022] On one hand, the top of the tool holder 1 is provided with a connecting groove 15, the bottom of the tool shaft 4 is fixedly connected with a tool head 5, and the outer wall of the tool shaft 4 is provided with a chip breaking port 8. There are multiple chip breaking ports 8, which are arranged at intervals. The worker connects to the milling machine through the connecting groove 15, uses the tool head 5 to enhance the opening effect of the tool shaft 4 on the material, and uses the chip breaking port 8 to break the chips due to stress changes during the discharge process. The chips are then blocked by the square plate 13 to prevent multiple chips from entangled with each other and then entangled with the tool shaft 4.

[0023] On the other hand, the horizontal sliding mechanism includes a slide rail 17, which is fixedly connected to the outer wall of the rotating ring 9. A slider 16 is slidably connected to the inner wall of the slide rail 17. An elastic mechanism is fixedly disposed at the bottom of the slider 16. An elastic element is fixedly disposed between the outer wall of the slider 16 and the inner wall of the slide rail 17. A trapezoidal block 18 is fixedly disposed at the bottom of the elastic mechanism. A conical sleeve 3 is fixedly sleeved at the bottom of the circular sleeve 2. The conical sleeve 3 abuts against the trapezoidal block 18, and the outer wall of the conical sleeve 3 is in contact with the inclined surface of the trapezoidal block 18. The elastic mechanism includes a spring 11. A circular rod 10 is fixedly connected to the top of the trapezoidal block 18. The slider 16 is slidably sleeved on the outer wall of the circular rod 10. The spring 10 is fixedly connected between the trapezoidal block 18 and the slider 16. The elastic mechanism includes a spring 11. A circular rod 10 is fixedly connected to the top of the trapezoidal block 18. The slider 16 is slidably sleeved on the outer wall of the circular rod 10. The spring 11 is fixedly connected between the trapezoidal block 18 and the slider 16. The elastic element is similar to the elastic mechanism. The elastic element includes a second spring and a circular rod. The second spring is fixedly connected between the slider 16 and the slide rail 17. When drilling, when the square plate 13 comes into contact with the material to be drilled, the square plate 13 squeezes the spring 11 through the trapezoidal block 18. When the drilling depth is deep, the knife handle 1 drives the circular sleeve 2 and the conical sleeve 3 to continue moving. The conical sleeve 3 pushes the trapezoidal block 18 to move away from the knife handle 1 and squeeze the elastic element. The trapezoidal block 18 drives the conical sleeve 3 to move so that the square plate 13 does not contact the knife neck 7.

[0024] Preferably, a connecting rod 12 is fixedly connected to the bottom of the trapezoidal block 18, and a square plate 13 is fixedly connected to the bottom of the connecting rod 12. There are two square plates 13 arranged horizontally and symmetrically. A brush 14 is fixedly connected to the side of each square plate 13 near the cutter shaft 4. The end of the brush 14 away from the square plate 13 is in contact with the surface of the cutter shaft 4. After the drilling work is completed, the cutter shaft 4 moves upward, and the spring 11 drives the square plate 13 to return to its vertical position. During the vertical return of the square plate 13, the cutter shaft 4 continues to rotate, and the brush 14 cleans the debris left on the surface of the cutter shaft 4 after drilling. When the square plate 13 is no longer in contact with the material, the elastic element drives the slider 16 to return to its position, and the slider 16 drives the square plate 13 to return to its horizontal position.

[0025] In specific operation: When drilling, the cutter handle 1 moves the square plate 13 downwards, and while the cutter handle 1 rotates at high speed, the centrifugal force drives the rotating ring 9 to rotate at a certain speed. The bottom of the square plate 13 abuts against the top of the material to be drilled, and the square plate 13 compresses the spring 11. The cutter shaft 4 continues to move downwards to drill. The square plate 13 stops when it abuts against the material to be drilled. The chips that are drilled out are discharged from the spiral groove 6 and follow the rotation of the cutter shaft 4 until the chips come into contact with the square plate 13. The cutter shaft 4 continues to rotate and cuts but is blocked by the square plate 13 and forcibly cut off, preventing the chips from wrapping around the milling cutter. During the upward movement of the cutter shaft 4 after drilling, the spring 11 returns to its original position, reducing the force that compresses the square plate 13. The rotating ring 9 is driven to rotate by the centrifugal force, which drives the square plate 13 to rotate and push away the blocked chips, so as not to affect the worker's observation.

[0026] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stepped helical cutter characterized by, Include: The shank (1) bottom fixed connection has the neck (7), the neck (7) bottom fixed connection has the tool shaft (4), the tool shaft (4) and the neck (7) outer wall are all set up spiral groove (6), the spiral groove (6) is used for guiding chip; The circular sleeve (2) fixed sleeve is connected to the outer wall of the shank (1), the circular sleeve (2) outer wall rotates sleeve has rotating ring (9), the rotating ring (9) below the elastic mechanism, the elastic mechanism below the square plate (13) is arranged; Horizontal sliding mechanism, the horizontal sliding mechanism is arranged outside the rotating ring (9), the horizontal sliding mechanism is used for driving the square plate (13) horizontal movement.

2. A stepped helical cutter according to claim 1 wherein, The shank (1) top is set up connection groove (15), the tool shaft (4) bottom fixed connection has the tool head (5), the tool shaft (4) outer wall is set up chip breaking (8), the chip breaking (8) is multiple and is arranged in upper and lower interval.

3. A stepped helical cutter according to claim 1 wherein, The horizontal sliding mechanism includes slide rail (17), the slide rail (17) fixed connection is arranged on the outer wall of the rotating ring (9), the slide rail (17) inner wall slidingly connected has sliding block (16), the elastic mechanism fixedly arranged in the bottom of the sliding block (16), the sliding block (16) outer wall and the slide rail (17) inner wall between fixedly arranged have elastic element.

4. A stepped helical cutter according to claim 3 wherein, The elastic mechanism bottom fixedly arranged has trapezoidal block (18), the circular sleeve (2) bottom fixed sleeve has tapered sleeve (3), the tapered sleeve (3) and trapezoidal block (18) are in abutment.

5. A stepped helical cutter according to claim 4 wherein, The elastic mechanism includes spring (11), the trapezoidal block (18) top fixedly connected has circular rod (10), the sliding block (16) sliding sleeve is connected to the outer wall of the circular rod (10), the spring (11) is fixedly connected between the trapezoidal block (18) and the sliding block (16).

6. A stepped helical cutter according to claim 5 wherein, The trapezoidal block (18) bottom fixedly connected has connecting rod (12), the square plate (13) is fixedly connected to the bottom of the connecting rod (12), the square plate (13) is two and is horizontally symmetrical arranged, two square plate (13) close to the tool shaft (4) one side is fixedly connected with brush (14), the brush (14) is away from the square plate (13) one end and the tool shaft (4) surface is pasted.

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