Novel indexable milling cutter disc
By designing a new type of milling cutter head with polygonal cutting inserts and inclined cutting edges, the problem of tool wear caused by high cutting forces was solved, and the cutting force was reduced and the chips were automatically discharged, thereby improving the durability of the tools and the machining quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2026-03-06
AI Technical Summary
The existing milling cutter heads have flat sides on both sides of the cutting inserts, resulting in large cutting forces that affect the structural strength and service life of the cutting inserts.
The design incorporates polygonal cutting inserts with polygonal cutting platforms and inclined cutting edges on both sides, forming chip vents to automatically remove residual chips. The inclined cutting edges also disperse the cutting force, reducing the force per unit area.
It effectively reduces cutting forces, improves the durability and machining stability of cutting inserts, extends tool life, and prevents chip accumulation.
Smart Images
Figure CN223970911U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining tool technology, and in particular to a novel indexable milling cutter disc. Background Technology
[0002] A milling cutter disc is a rotary cutting tool used for milling operations. It is characterized by having one or more cutting edges, and its overall shape resembles a disc. During operation, the rotating milling cutter disc brings the cutting edges into contact with the workpiece and cuts away unwanted material from the workpiece surface, thus machining the workpiece.
[0003] Currently, the cutting edges of milling cutters in existing technologies are flat on both sides. During the cutting process, the flat cutting edges generate a large cutting force, which places higher demands on the structural strength of the cutting edges. This can easily lead to breakage and damage of the cutting edges, affecting their service life. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of indexable milling cutter head, which can reduce the cutting force generated during workpiece machining and improve the durability of the cutting inserts.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel indexable milling cutter disc, comprising a cutter disc body, wherein the cutter disc body is evenly provided with a plurality of fixed posts, and a cutting bit placement groove is provided on the fixed posts. A cutting bit is detachably installed in the cutting bit placement groove. The cutting bit has a polygonal structure, and the two sides of the cutting bit protrude outward to form a polygonal cutting platform. A plurality of cutting edges are evenly provided on the two sides of the cutting bit. A plurality of platform corners are formed on the outer edge of the polygonal cutting platform. Each platform corner and each cutting edge are staggered. The cutting edge is inclined inward to form a cutting surface. The outer side of the platform corner is connected to the cutting surface to form a chip removal groove.
[0006] When the cutting edge contacts the workpiece, the chips generated during cutting are discharged outward along the chip removal groove.
[0007] Furthermore, a rake angle and a cutting edge tilt angle are formed between the cutting edge and the outer end face of the polygonal cutting table.
[0008] Furthermore, the angle range of the front angle is 9°-12°, and the angle range of the blade inclination angle is 5°-6°.
[0009] Furthermore, the cutting edge includes a first cutting edge, an arc-shaped cutting edge, and a flank face. The first cutting edge, the arc-shaped cutting edge, and the flank face are integrally connected. The arc-shaped cutting edge is located between the first cutting edge and the flank face. The end of the first cutting edge and the flank face away from the arc-shaped cutting edge is connected to the chip removal groove.
[0010] Furthermore, a chamfer is formed between the outer side of the table corner and the outer end face of the polygonal cutting table.
[0011] Furthermore, the angle range of the inclined groove angle is 110°-120°.
[0012] Furthermore, the insert placement groove is provided with multiple filling grooves, and the cutting edge of the cutting insert that contacts the insert placement groove is placed in the filling groove.
[0013] Furthermore, the cutting edges on both sides of the cutting tool are centrally symmetrical about the central plane of the cutting tool.
[0014] The beneficial effects of this utility model are:
[0015] This invention provides a polygonal cutting platform on both sides of the cutting insert. The corner of the outer edge of the polygonal cutting platform is connected to the inwardly inclined cutting edge of the cutting insert to form a chip removal groove, which facilitates the removal of chips during workpiece processing and achieves automatic chip removal, thus avoiding chip accumulation.
[0016] Meanwhile, this invention sets each cutting edge of the cutting insert to be inclined inward. Compared with cutting inserts with flat sides, the cutting edge can more effectively disperse the cutting force during cutting, reduce the force per unit area, and thus reduce tool wear and cutting resistance. Therefore, this invention significantly reduces the cutting force generated when machining workpieces and improves the durability of the cutting insert. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the novel indexable milling cutter disc in this utility model;
[0018] Figure 2 This is a schematic diagram of the cutting tool insert in this utility model.
[0019] Reference numerals in the attached drawings: 1. Tool head body; 2. Fixing post; 3. Tool insert placement groove; 4. Cutting tool insert; 5. Cutting edge; 51. First cutting edge; 52. Arc-shaped cutting edge; 53. Rake face; 6. Chip removal groove; 7. Hole filling groove; 8. Polygonal cutting table; 9. Table corner. Detailed Implementation
[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.
[0021] Example 1, referring to Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides a novel indexable milling cutter head, which can reduce the cutting force generated when machining workpieces and improve the durability of cutting inserts 4. It includes a cutter head body 1, a plurality of fixed posts 2 are evenly provided on the cutter head body 1, and a cutting insert placement groove 3 is provided on the fixed posts 2. A cutting insert 4 is detachably installed in the cutting insert placement groove 3. The cutting insert 4 has a polygonal structure. The two sides of the cutting insert 4 protrude outward to form a polygonal cutting platform 8. A plurality of cutting edges 5 are evenly provided on the two sides of the cutting insert 4. A plurality of platform corners 9 are formed on the outer edge of the polygonal cutting platform 8. Each platform corner 9 is staggered with each cutting edge 5. The cutting edge 5 of the cutting insert 4 is inclined inward to form a cutting surface. The outer side of the platform corner 9 is connected to the cutting surface to form a chip removal groove 6.
[0022] When the cutting edge 5 contacts the workpiece, the chips generated during cutting are discharged outward along the chip removal groove 6.
[0023] Working principle of Example 1:
[0024] During cutting, the inclined cutting edge 5 decomposes the tangential force into horizontal and vertical forces, distributing the cutting force along the inclined plane and reducing lateral pressure. Compared to a flat cutting edge 5, the inclined cutting edge 5 can more effectively disperse the cutting force, reducing the force per unit area and thus reducing tool wear and cutting resistance. Therefore, this embodiment significantly reduces the cutting force generated during workpiece machining and improves the durability of the cutting insert 4.
[0025] Meanwhile, in this embodiment, polygonal cutting platforms 8 are provided on both sides of the cutting insert 4. The corners 9 of the outer edge of the polygonal cutting platform 8 are connected to the inwardly inclined cutting edge 5 of the cutting insert 4 to form a chip removal groove 6, which facilitates the removal of chips by the cutting edge 5 during workpiece processing, realizes automatic chip removal, and avoids chip accumulation.
[0026] Specifically, in this embodiment, the cutting insert 4 is octagonal in shape, the polygonal cutting table 8 is octagonal in shape, and eight cutting edges 5 are provided on both sides of the cutting insert 4, forming a total of 16 cutting edges 5. Setting multiple cutting edges 5 on both sides can realize the practicality and durability of the cutting insert 4.
[0027] Preferably, a rake angle and a cutting edge inclination angle are formed between the cutting edge and the outer end face of the polygonal cutting table 8.
[0028] Specifically, in this embodiment, the rake angle and the inclination angle formed between the cutting edge and the outer end face of the polygonal cutting table 8 can ensure the cutting effect of the inclined cutting edge 5.
[0029] Preferably, the rake angle ranges from 9° to 12°, and the blade inclination angle ranges from 5° to 6°.
[0030] Specifically, in this embodiment, the rake angle is 10.04° and the cutting edge inclination angle is 5.06°. When the rake angle and the cutting edge inclination angle are within the above angle range, the cutting force can be effectively reduced, and the cutting effect of the cutting edge 5 is optimal.
[0031] Preferably, the cutting edge 5 includes a first cutting edge 51, an arc-shaped cutting edge 52, and a flank face 53. The first cutting edge 51, the arc-shaped cutting edge 52, and the flank face 53 are integrally connected. The arc-shaped cutting edge 52 is located between the first cutting edge 51 and the flank face 53. The end of the first cutting edge 51 and the flank face 53 away from the arc-shaped cutting edge 52 is connected to the chip removal groove 6.
[0032] Specifically, in this embodiment, during the cutting process of the workpiece, the first cutting edge 51 and the arc-shaped cutting edge 52 contact the workpiece and perform cutting processing. The back side of the flank face 53 is connected to the chip removal groove 6 to form an integrated structure, which improves the structural integration of the cutting edge 5 and the chip removal groove 6.
[0033] Example 2, refer to Figure 2 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a chamfered groove angle, which can further improve the convenience of chip removal. A chamfered groove angle is formed between the outer side of the table angle 9 and the outer end face of the polygonal cutting table 8.
[0034] Working principle of Example 2:
[0035] When the chips generated by the cutting edge 5 are splashed onto the outer surface of the table corner 9, the chips will slide down the outer surface of the table corner 9 due to the presence of the inclined groove angle, which can avoid chip accumulation and further improve the convenience of chip removal.
[0036] Preferably, the angle of the inclined groove is in the range of 110°-120°.
[0037] Specifically, in this embodiment, when the angle of the inclined groove is between 110° and 120°, the effect of chip sliding can be guaranteed, and the chip groove formation effect is better, ensuring that the chip can be discharged normally.
[0038] Preferably, the insert placement groove 3 has multiple filling grooves 7, and the cutting edge 5 of the cutting insert 4 that contacts the insert placement groove 3 is placed in the filling groove 7.
[0039] Specifically, in this embodiment, by setting multiple filler grooves 7 in the insert placement groove 3 and placing the cutting edge 5 that contacts the insert placement groove 3 in the filler groove 7, it is possible to prevent the cutting edge 5 from scratching the insert placement groove 3 and improve the durability of the cutter head body 1.
[0040] Preferably, the cutting edges 5 on both sides of the cutting insert 4 are centrally symmetrical about the central plane of the cutting insert 4.
[0041] Specifically, in this embodiment, by setting the cutting edges 5 on both sides of the cutting insert 4 to be centrally symmetrical about the central plane of the cutting insert 4, it helps to maintain the balance of the tool during cutting, reduce vibration and fluctuations in cutting force, thereby improving cutting stability. It also optimizes the distribution of cutting force: because the cutting edges 5 are symmetrical, the cutting force can be more evenly distributed on the two cutting edges 5, avoiding tool wear or breakage caused by concentrated cutting force. Ultimately, it improves the surface quality of the machined part: the symmetrical cutting edges 5 ensure that the workpiece surface is subjected to more uniform force during cutting, thereby reducing surface roughness and improving machining quality.
[0042] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.
Claims
1. A novel indexable milling cutter disc, comprising a cutter disc body (1) uniformly provided with a plurality of fixing columns (2), the fixing columns (2) are provided with cutter grain placing grooves (3), and the cutter grain placing grooves (3) are detachably installed with cutting grains (4), characterized in that, The cutting tool grain (4) is polygonal structure, two sides of the cutting tool grain (4) are outwardly convex to form a polygonal cutting platform (8), a plurality of cutting edges (5) are uniformly arranged on the two sides of the cutting tool grain (4), a plurality of platform corners (9) are formed on the outer edge of the polygonal cutting platform (8), each platform corner (9) is staggered with each cutting edge (5), the cutting edge (5) is inwardly inclined to form an edge surface, and the outer side surface of the platform corner (9) is connected with the edge surface to form a chip groove (6). When the cutting edge (5) contacts the workpiece, the residual chip formed by cutting is discharged outward along the chip groove (6).
2. The novel indexable milling cutter disc according to claim 1, characterized in that: The edge surface and the outer end surface of the polygonal cutting platform (8) form a rake angle and a relief angle.
3. The novel indexable milling cutter disc according to claim 2, characterized in that: The rake angle ranges from 9° to 12°, and the relief angle ranges from 5° to 6°.
4. The novel indexable milling cutter head according to claim 1, characterized in that: The cutting edge (5) comprises a first cutting edge (51), an arc-shaped cutting edge (52) and a relief surface (53), the first cutting edge (51), the arc-shaped cutting edge (52) and the relief surface (53) are integrally connected, the arc-shaped cutting edge (52) is located between the first cutting edge (51) and the relief surface (53), and the first cutting edge (51) and the relief surface (53) are connected with the chip groove (6) at one end away from the arc-shaped cutting edge (52).
5. The novel indexable milling cutter disc as claimed in claim 1, wherein: The outer side surface of the platform corner (9) and the outer end surface of the polygonal cutting platform (8) form a chute angle.
6. The novel indexable milling cutter disc according to claim 5, characterized in that: The chute angle ranges from 110° to 120°.
7. The novel indexable milling cutter head according to claim 1, characterized in that: A plurality of empty slot (7) are arranged in the tool grain placing groove (3), and the cutting edge (5) of the cutting tool grain (4) in contact with the tool grain placing groove (3) is placed in the empty slot (7).
8. The novel indexable milling cutter disc as claimed in claim 1, wherein: The cutting edges (5) on both sides of the cutting tool grain (4) are centrally symmetric about the center plane of the cutting tool grain (4).