A three-way key milling cutter

Abstract

The utility model relates to the technical field of slot milling cutter, especially a three-flank key slot milling cutter, including cutter component, the cutter component is inserted in the inside of handle component, the handle component outside is equipped with neck component, the cutter component includes rear tool face, the rear tool face front end fixedly connected with rake face, the inside of rake face is equipped with tooth gap, the rear tool face rear end fixedly connected with plug rod, the neck component includes neck cylinder shell, the inside of neck cylinder shell is equipped with straight hole and screw hole, the position of neck cylinder shell is close to the front end and is equipped with stripe, the handle component includes handle shell, the inside of handle shell is equipped with insertion slot, the handle shell front end is equipped with movable groove and screw thread strip, in the utility model, the device has improved the strength of end tooth tip, thereby has promoted the anti -collapse performance, effectively prevented the blade tip in the processing process and collapsed because of equipment shaking or manual tool path uneven and cracked, has guaranteed the stability and durability of milling cutter.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, specifically a three-sided key milling cutter. Background Technology

[0002] A three-sided keyway cutter is a tool specifically designed for milling keyways. It has three cutting edges, typically designed to be cylindrical or conical, with straight or helical teeth. The three cutting edges of this cutter can cut simultaneously, improving machining efficiency and accuracy. It is suitable for machining keyways on shaft parts, ensuring the dimensional accuracy and surface quality of the keyways. Three-sided keyway cutters are commonly used in milling processes in machining and are widely used in industries such as automotive, aerospace, and machinery manufacturing. Existing key slot milling cutters typically have a single-edge design that passes through the center and has a large tooth backlash. When used on a desktop manual key machine, this type of end-edge groove design is prone to chipping at the tip due to reaction force, leading to damage and scrapping of the key milling cutter. Therefore, a three-sided key slot milling cutter is proposed to address the above problems. Utility Model Content

[0003] The purpose of this utility model is to provide a three-sided key milling cutter to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A three-sided key milling cutter includes a cutter assembly inserted into the interior of a shank assembly. A neck assembly is mounted on the outer side of the shank assembly. The cutter assembly includes a flank face, with a front face fixedly connected to the front end of the flank face. A toothed opening is formed on the inner side of the front face, and a insert rod is fixedly connected to the rear end of the flank face. The neck assembly includes a neck housing, with a straight hole and a threaded hole formed on the inner side of the neck housing. Stripes are formed near the front end of the neck housing. The shank assembly includes a shank housing, with a slot formed on the inner side of the shank housing. A movable groove and a threaded strip are formed at the front end of the shank housing.

[0005] As a further optimization of this utility model, the number of tooth gaps is three, the tooth gaps are in a spiral structure, the tooth gaps are in a circumferentially equidistant array outside the rake face, and the tooth gaps extend to the outside of the flank face.

[0006] As a further optimization of this utility model, the insert rod is inserted into the inside of the slot, and the rear end of the back blade face is in contact with the front end of the handle shell.

[0007] As a further optimization of this utility model, the front view shape of the insertion rod is cross-shaped, and the front view shape of the slot opening is cross-shaped.

[0008] As a further optimization of this utility model, the neck shell is sleeved on the outside of the back cutter face through a straight hole and a screw hole, the neck shell is threadedly connected to the threaded bar through the screw hole, and the neck shell fits against the outer side of the back cutter face through the straight hole.

[0009] As a further optimization of this utility model, a spring telescopic rod is fixedly connected to the inner side of the handle housing, and a ring is fixedly connected to the front end of the plurality of spring telescopic rods. A second one-way tooth is fixedly connected to the front end of the ring, and the ring is sleeved on the outer side of the handle housing.

[0010] As a further optimization of this utility model, the rear end of the neck shell is fixedly connected to a first one-way tooth, which meshes with a second one-way tooth.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, through the design of the cutter assembly, neck assembly, and shank assembly, the device optimizes the end-edge design, extending all three cutting edges to the center and narrowing the tooth clearance, significantly improving the strength of the end tooth tip and thus enhancing its anti-splitting performance. This effectively prevents the cutting tip from cracking during processing due to equipment vibration or uneven manual feed, ensuring the stability and durability of the milling cutter and extending its service life. Furthermore, its unique structural design makes replacement after cutter wear more convenient, eliminating the need to remove the milling cutter from the key machine spindle; only the cutter head needs to be replaced, reducing economic losses, simplifying the replacement process, and improving ease of use and efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded structural diagram of the entire utility model; Figure 3 This is a schematic diagram of the insertion rod structure of this utility model; Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A; Figure 5 This is a cross-sectional structural diagram of the neck assembly of this utility model; Figure 6 This is a cross-sectional structural diagram of the tool holder assembly of this utility model; Figure 7 This utility model Figure 6 A schematic diagram of the structure at point B.

[0013] In the diagram: 1. Cutter assembly; 11. Back face; 12. Front face; 13. Backlash; 14. Insert rod; 2. Neck assembly; 21. Neck housing; 22. Straight hole; 23. Screw hole; 24. Stripe; 25. First one-way tooth; 3. Tool holder assembly; 31. Tool holder housing; 32. Slot; 33. Movable groove; 34. Threaded strip; 35. Spring telescopic rod; 36. Ring; 37. Second one-way tooth. Detailed Implementation

[0014] 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.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Please see Figures 1-7 This utility model provides a technical solution: A three-sided key milling cutter includes a cutter assembly 1, which is inserted into the inside of a handle assembly 3. A neck assembly 2 is installed on the outside of the handle assembly 3. The cutter assembly 1 includes a rear face 11, a front face 12 is fixedly connected to the front end of the rear face 11, a tooth gap 13 is formed on the inner side of the front face 12, and a plug rod 14 is fixedly connected to the rear end of the rear face 11. The neck assembly 2 includes a neck shell 21, a straight hole 22 and a threaded hole 23 are formed on the inner side of the neck shell 21, and a stripe 24 is formed near the front end of the neck shell 21. The handle assembly 3 includes a handle shell 31, a slot 32 is formed on the inner side of the handle shell 31, and a movable groove 33 and a threaded strip 34 are formed at the front end of the handle shell 31.

[0017] As a further implementation of this solution, the number of tooth gaps 13 is three. The tooth gaps 13 are in a spiral structure and are arranged in a circumferentially equidistant array outside the rake face 12. The tooth gaps 13 extend to the outside of the flank face 11. With the above arrangement, the three spiral tooth gaps 13 are arranged in a circumferentially equidistant array outside the rake face 12 and extend to the outside of the flank face 11. This design allows the milling cutter to distribute the cutting force more evenly during machining, improving cutting efficiency and machining accuracy. At the same time, the spiral structure helps to remove chips, reduces the impact of chips on the machined surface, and further improves the machining quality. As a further implementation of this solution, the insert rod 14 is inserted into the inside of the slot 32, and the rear end of the back face 11 is in contact with the front end of the tool holder housing 31. The front view shape of the insert rod 14 is cross-shaped, and the front view shape of the slot 32 is also cross-shaped. Through the above settings, the connection is strengthened, stress is better dispersed, stress concentration is reduced, and the tool service life is extended. At the same time, the cross-shaped structure also helps to improve the positioning accuracy and installation stability of the tool. As a further implementation of this solution, the neck shell 21 is sleeved on the outside of the back face 11 through the straight hole 22 and the screw hole 23. The neck shell 21 is threaded to the threaded bar 34 through the screw hole 23. The neck shell 21 fits against the outside of the back face 11 through the straight hole 22. Through the above arrangement, this structural design allows the neck shell 21 to be firmly fixed on the back face 11, improving the convenience of disassembly and assembly. As a further implementation of this solution, a spring telescopic rod 35 is fixedly connected to the inner side of the tool holder shell 31. A ring 36 is fixedly connected to the front end of multiple spring telescopic rods 35. A second one-way tooth 37 is fixedly connected to the front end of the ring 36. The ring 36 is sleeved on the outer side of the tool holder shell 31. A first one-way tooth 25 is fixedly connected to the rear end of the neck shell 21. The first one-way tooth 25 meshes with the second one-way tooth 37. Through the above arrangement, this design enables the neck shell 21 to achieve unidirectional rotation through the meshing of the first one-way tooth 25 and the second one-way tooth 37, preventing the reverse rotation of the tool during the machining process, thereby improving the safety and reliability of the machining. At the same time, the meshing structure can provide stable power transmission, ensuring the continuity and stability of the machining process.

[0018] Workflow: During installation, insert the insert rod 14 into the slot 32 of the tool holder housing 31 until the rear end of the insert rod 14 is in contact with the rear end of the slot 32 of the tool holder housing 31, and at the same time, the rear end of the back face 11 is in contact with the front end of the tool holder housing 31. At this time, the neck housing 21 is fitted onto the outside of the back face 11 through the threaded hole 23 and the straight hole 22. When the threaded hole 23 contacts the threaded bar 34, rotate the neck housing 21 by operating the bar 24. The neck housing 21 is threadedly connected to the threaded bar 34 through the threaded hole 23. At this time, the neck housing 21 will move backward. When the first single After the first one-way tooth 25 contacts the second one-way tooth 37, the first one-way tooth 25 will push the second one-way tooth 37 and the ring 36 to move backward. The ring 36 moves inside the movable groove 33 and squeezes the multiple spring telescopic rods 35. Through the elastic force of the spring telescopic rods 35, the second one-way tooth 37 is kept engaged with the first one-way tooth 25. According to the shape design of the first one-way tooth 25 and the second one-way tooth 37, after the first one-way tooth 25 and the second one-way tooth 37 are engaged, the neck shell 21 can only rotate in one direction until the neck shell 21 can no longer rotate, and the installation is completed. When in use, the tool holder housing 31 is installed on the main spindle of the key machine. After installation, the ring 36 is located outside the main spindle of the key machine. When milling grooves for the key, the front face 12 extends to the center of the rear face 11. The tooth gap 13 is narrower than the traditional groove, thereby improving the strength of the end tooth tip and enhancing the anti-chipping performance. During the processing, even if the processing equipment vibrates or the manual tool feed is uneven, it will not cause chipping of the end face 12, ensuring the stability and durability of the milling cutter. When the front blade face 12 is worn to a certain extent and needs to be replaced, it is not necessary to remove the handle housing 31 from the key machine spindle. By pushing the ring 36 to move away from the neck housing 21, the second one-way tooth 37 and the first one-way tooth 25 are separated. At this time, rotate the neck housing 21 until the neck housing 21 is separated from the outside of the handle housing 31. Then, the insert 14 that fixes the rear blade face 11 is removed from the inside of the slot 32, and the entire blade assembly 1 is replaced. This structural design only requires the replacement of the blade assembly 1, which not only reduces economic losses, but also, compared with the replacement method of the existing technology, it does not require the removal of the handle housing 31 from the key machine, reducing the process of subsequent fixing and adjustment, and improving the convenience of use.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-sided key milling cutter, comprising a cutter assembly (1), characterized in that: The blade assembly (1) is inserted into the inside of the handle assembly (3), and the neck assembly (2) is installed on the outside of the handle assembly (3). The blade assembly (1) includes a rear blade face (11), a front blade face (12) is fixedly connected to the front end of the rear blade face (11), a tooth gap (13) is opened on the inner side of the front blade face (12), and a plug rod (14) is fixedly connected to the rear end of the rear blade face (11). The neck assembly (2) includes a neck shell (21), with a straight hole (22) and a screw hole (23) on the inner side of the neck shell (21), and stripes (24) on the neck shell (21) near the front end. The handle assembly (3) includes a handle housing (31), a slot (32) is provided on the inner side of the handle housing (31), and a movable groove (33) and a threaded strip (34) are provided at the front end of the handle housing (31).

2. The three-sided key milling cutter according to claim 1, characterized in that: The number of the tooth gaps (13) is three. The tooth gaps (13) are in a spiral structure. The tooth gaps (13) are arranged in a circumferentially equidistant array outside the front face (12). The tooth gaps (13) extend to the outside of the back face (11).

3. A three-sided key milling cutter according to claim 1, characterized in that: The insert (14) is inserted into the slot (32), and the rear end of the back blade (11) is in contact with the front end of the handle shell (31).

4. A three-sided key milling cutter according to claim 1, characterized in that: The front view shape of the insert (14) is cross-shaped, and the front view shape of the slot (32) is also cross-shaped.

5. A three-sided key milling cutter according to claim 1, characterized in that: The neck shell (21) is fitted onto the outside of the back face (11) through a straight hole (22) and a screw hole (23). The neck shell (21) is threaded to the threaded bar (34) through the screw hole (23). The neck shell (21) is attached to the outside of the back face (11) through the straight hole (22).

6. A three-sided key milling cutter according to claim 1, characterized in that: A spring telescopic rod (35) is fixedly connected to the inner side of the handle shell (31). A ring (36) is fixedly connected to the front end of the multiple spring telescopic rods (35). A second one-way tooth (37) is fixedly connected to the front end of the ring (36). The ring (36) is sleeved on the outer side of the handle shell (31).

7. A three-sided key milling cutter according to claim 1, characterized in that: The rear end of the neck shell (21) is fixedly connected to a first one-way tooth (25), which meshes with a second one-way tooth (37).

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