Milling blade with variable tool cutting edge angle
By designing inserts with variable lead angles on milling cutters, and utilizing detachable insert mounting parts and inserts with different torsion angles, the problems of milling cutter resource waste and high production costs are solved, achieving efficient production and long insert life.
Patent Information
- Application Number
- CN202423160191.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-20
AI Technical Summary
In existing milling cutters, one type of cutter body corresponds to only one major cutting edge angle, which leads to resource waste, increased production costs, and decreased production efficiency.
A milling insert with a variable main deflection angle is designed. By arranging a detachable insert mounting portion and inserts with different torsion angles on the cutter body, the main deflection angle can be adjusted, avoiding the need to replace the cutter body.
It reduces the waste of cutter body resources, reduces production costs, improves production efficiency and cutting efficiency, and extends the service life of the blade.
Smart Images
Figure CN223476400U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metal cutting, and more specifically, to a milling insert with a variable principal cutting edge angle. Background Technology
[0002] In existing face milling cutters, the principal cutting edge angle has a significant impact on radial cutting force and depth of cut. The magnitude of the radial cutting force directly affects the cutting power and the tool's vibration resistance. A smaller principal cutting edge angle results in a smaller radial cutting force and better vibration resistance, but also a smaller depth of cut, extended tool life, and thin, wide chips, making it ideal for machining stainless steel and other difficult-to-machine materials. Conversely, a larger principal cutting edge angle allows for effective machining with a large depth of cut, less downward pressure on the workpiece, and the back force is borne by the machine tool spindle, thus reducing cutting power. In actual machining, the workpiece materials are often diverse. Currently, each cutter body corresponds to only one principal cutting edge angle. Continuing to use only one cutter body for one principal cutting edge angle would waste resources in the manufacturing process. From the manufacturer's perspective, continuing to use only one cutter body for one principal cutting edge angle would lead to increased production costs and decreased production efficiency.
[0003] How to invent a milling insert with a variable principal cutting edge angle to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a milling insert with a variable principal cutting edge angle, which aims to improve the existing milling cutter where one cutter body corresponds to only one principal cutting edge angle. If one cutter body is used to correspond to only one principal cutting edge angle, it will cause a waste of resources in terms of cutter body during manufacturing. From the manufacturer's perspective, if one cutter body is used to correspond to only one principal cutting edge angle, it will cause problems such as increased production costs and decreased production efficiency.
[0005] This invention is implemented as follows: A milling insert with a variable principal cutting edge angle includes a cutter body and three inserts of two types mounted on one end of the cutter body. Three insert mounting portions are integrally arranged in a ring around one end of the cutter body. Each insert mounting portion has an angle with the axis of the cutter body. Each insert mounting portion has a mounting groove on one side surface, and a threaded hole is formed on the inner wall of one side of each mounting groove. A corresponding insert is detachably connected to each mounting groove by bolts. Each type of insert includes a positioning base and a cutting body. Both the positioning base and the cutting body are cubic structures and integrally formed. The upper surface of the cutting body has an insertion hole for a through-bolt. The positioning base and the cutting body have a rotational angle with respect to the insertion hole axis. The periphery of the upper surface of the cutting body is the cutting edge. The four sides of the positioning base are positioning surfaces. The adjacent inner walls on both sides of each mounting groove are the cutter body positioning surfaces. The angle between the positioning base and the cutting body is inconsistent in the two types of inserts.
[0006] In a preferred embodiment of this utility model, the rotation angle between the positioning base and the cutting body in one type of blade is positive 2.5°, and the rotation angle between the positioning base and the cutting body in the other type of blade is negative 2.5°.
[0007] In a preferred embodiment of this utility model, the bottom end face of each blade mounting part forms an angle of 9.5° with the horizontal plane.
[0008] In a preferred embodiment of this utility model, the upper surface of the cutting body is provided with a recessed chip breaking groove, and the four cutting edges are connected to the inner wall of the bottom of the chip breaking groove by a rake face structure, and the ends of two adjacent rake faces are connected by a tool face arc structure.
[0009] In a preferred embodiment of this utility model, each of the blade mounting portions has a chip groove on the side surface away from the mounting groove.
[0010] In a preferred embodiment of this utility model, the four sides of the cutting body are flank faces, and each cutting edge is the junction of the corresponding front face and flank face.
[0011] In a preferred embodiment of this utility model, a transition arc structure is provided between the back cutter face and the positioning surface on the corresponding side.
[0012] In a preferred embodiment of this utility model, a circular arc structure is provided between two adjacent back facets for connection.
[0013] In a preferred embodiment of this utility model, a circular arc structure is provided between two adjacent positioning surfaces for connection.
[0014] The beneficial effects of this utility model are as follows: The variable principal cutting edge angle milling insert obtained by the above design can be used by setting the cutter body and the insert as two independent parts and connecting them detachably with bolts. Two types of inserts with different torsion angles can be set for replacement. The overall principal cutting edge angle can be adjusted without replacing the cutter body, which solves the waste of cutter body resources in manufacturing and greatly reduces the cost for users. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic perspective view of the overall structure provided by the embodiment of this utility model;
[0017] Figure 2 A perspective view of the overall separable structure provided for an embodiment of this utility model;
[0018] Figure 3 A perspective view of the overall structure of the blade provided for an embodiment of this utility model;
[0019] Figure 4 A perspective view of the overall structure of the blade provided for an embodiment of this utility model;
[0020] Figure 5 A perspective view illustrating the overall structure of the blade on the other side, provided for an embodiment of this utility model.
[0021] In the diagram: 1-locating surface; 2-transition arc; 3-rake face; 4-insertion hole; 5-cutting edge; 6-chip breaker groove; 7-tool face arc; 8-flank face arc; 9-locating surface arc; 10-flank face; 11-tool body; 12-insert mounting part; 13-chip groove; 14-tool body locating surface; 15-threaded hole; 16-insert; 17-bolt. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0023] Please see Figures 1 to 5 This utility model provides a technical solution: a milling insert with a variable principal cutting edge angle, comprising a cutter body 11 and three inserts 16 mounted on one end of the cutter body 11. Three insert mounting portions 12 are integrally formed in a ring shape on one end of the cutter body 11. Each insert mounting portion 12 has an angle with the axis of the cutter body 11. A mounting groove is formed on one side surface of each insert mounting portion 12, and a threaded hole 15 is formed on the inner wall of one side of each mounting groove. A corresponding insert is detachably connected to each mounting groove via bolts 17. The blade 16 includes a positioning base and a cutting body. Both the positioning base and the cutting body are cubic structures and are integrally formed. The upper surface of the cutting body has an insertion hole 4 for a through-hole bolt 17. The positioning base and the cutting body are rotated at an angle about the axis of the insertion hole 4. The periphery of the upper surface of the cutting body is the cutting edge 5. The four sides of the positioning base are positioning surfaces 1. The adjacent inner walls on both sides of each mounting groove are the blade positioning surfaces 14. The angle between the positioning base and the cutting body is different in the two types of blades 16.
[0024] Please see Figures 3 to 5 In one type of blade 16, the rotation angle between the positioning base and the cutting body is positive 2.5°, while in the other type of blade 16, the rotation angle between the positioning base and the cutting body is negative 2.5°.
[0025] The two types of blades 16 have the same overall structure. The torsional angles between the positioning base and the cutting body in the two types of blades 16 are completely opposite, which also makes the angle between the cutting edge 5 and the positioning surface 1 on the corresponding side completely opposite. Therefore, when the two types of blades 16 are installed on the corresponding blade mounting part 12 by bolts 17, the angle difference between the two types of blades 16 and the blade body 11 is further increased after the offset angle of each blade mounting part 12 relative to the axis of the blade body 11. Thus, by changing different types of blades 16, the effect of changing the main cutting angle can be achieved.
[0026] Furthermore, the bottom face of each blade mounting part 12 forms an angle of 9.5° with the horizontal plane.
[0027] Each blade mounting portion 12 is offset by 9.5° away from the axis of the blade body 11, so that each blade mounting portion 12 is tilted outward. When different types of blades 16 are installed on the blade mounting portion 12, the corresponding two positioning surfaces 1 and the blade positioning surfaces 14 in each mounting groove are in contact with each other. Based on the overall offset of the blade mounting portion 12 by 9.5°, and with the different torsion angles of the two types of blades 16, the relative angles between the two types of blades 16 and the blade body 11 are 7° and 12° respectively, so that the two overall main cutting angles can be adjusted.
[0028] Furthermore, the upper surface of the cutting body is provided with a recessed chip breaker groove 6, and the four cutting edges 5 are connected to the inner wall of the bottom of the chip breaker groove 6 by a rake face 3 structure, and the ends of two adjacent rake faces 3 are connected by a tool face arc 7 structure.
[0029] The chip breaker groove 6 helps break chips during cutting, while the rake face 3 and the tool face arc 7 optimize the cutting effect of the cutting edge. This improves cutting efficiency and cutting quality, and reduces resistance during the cutting process.
[0030] Furthermore, each blade mounting portion 12 has a chip-collecting groove 13 on the side surface away from the mounting groove.
[0031] The chip groove 13 is used to store chips generated during the cutting process, preventing chip accumulation from affecting the cutting effect. It keeps the cutting area clean and improves cutting efficiency and cutting quality.
[0032] Furthermore, the four sides of the cutting body are flank faces 10, and each cutting edge 5 is the junction of the rake face 3 and the flank face 10.
[0033] The flank face 10 supports the cutting edge 5, ensuring its stability and cutting performance during the cutting process. This improves cutting efficiency and quality.
[0034] Furthermore, a transition arc 2 structure is provided between the back face 10 and the positioning face 1 on the corresponding side.
[0035] The transition arc 2 helps reduce stress concentration during the cutting process, improving the durability of the cutting tool. This enhances the strength and durability of the cutting tool 16, extending its service life.
[0036] Furthermore, a rear cutter face arc 8 structure is provided between two adjacent rear cutter faces 10 for connection.
[0037] The 8-radius radius on the flank helps optimize the cutting effect of the cutting edge and reduce resistance during the cutting process. This improves cutting efficiency and quality while reducing energy consumption during cutting.
[0038] Furthermore, a positioning surface arc 9 structure is provided between two adjacent positioning surfaces 1 for connection.
[0039] The locating surface arc 9 also helps to reduce stress concentration during the cutting process, improve the overall stability of the insert 16, and improve cutting efficiency and cutting quality.
[0040] Working principle: Based on the actual cutting principal cutting angle requirements, rotate the corresponding type of blade 16 and place the positioning base of each blade 16 into the corresponding mounting slot, so that the two adjacent positioning surfaces 1 and the two tool body positioning surfaces 14 in the mounting slot fit together, completing the positioning of the blade 16. At this time, the insertion hole 4 on the blade 16 corresponds to the position of the threaded hole 15 in the mounting slot. The bolt 17 is passed through the insertion hole 4 and threaded into the threaded hole 15 to complete the installation of the blade 16. The positioning base and the cutting body torsion angle in each type of blade 16 are matched with the deviation angle of the blade mounting part 12 relative to the tool body 11, which can further expand the included angle between the blade 16 and the tool body 11. By designing the tool body 11 and the blade 16 as two independent parts, the overall principal cutting angle can be switched between 7° and 12° by changing the blade 16 with different torsion angles, so as to reduce the limitations in use and improve the overall service life.
[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A milling insert with a variable principal cutting edge angle, comprising a cutter body and three inserts mounted on one end of the cutter body, characterized in that, The cutter body has three ring-shaped blade mounting parts integrally formed at one end. Each blade mounting part has an angle with the axis of the cutter body. Each blade mounting part has a mounting groove on one side surface. Each mounting groove has a threaded hole on one side inner wall. Each mounting groove is detachably connected to a corresponding blade by bolts. Each type of blade includes a positioning base and a cutting body. Both the positioning base and the cutting body are cubic structures and are integrally formed. The upper surface of the cutting body has an insertion hole for a through bolt. The positioning base and the cutting body have a rotation angle with respect to the axis of the insertion hole. The periphery of the upper surface of the cutting body is the cutting edge. The four sides of the positioning base are positioning surfaces. The adjacent inner walls on both sides of each mounting groove are the blade body positioning surfaces. The angle between the positioning base and the cutting body is different in the two types of blades.
2. The milling insert with variable principal cutting edge angle as described in claim 1, characterized in that: In one type of blade, the rotation angle between the positioning base and the cutting body is positive 2.5°, while in the other type of blade, the rotation angle between the positioning base and the cutting body is negative 2.5°.
3. The milling insert with variable principal cutting edge angle as described in claim 1, characterized in that: The bottom face of each blade mounting part forms an angle of 9.5° with the horizontal plane.
4. The milling insert with variable principal cutting edge angle as described in claim 1, characterized in that: The upper surface of the cutting body is provided with a recessed chip breaking groove, and the four cutting edges are connected to the inner wall of the bottom of the chip breaking groove by a rake face structure. The ends of two adjacent rake faces are connected by a tool face arc structure.
5. The milling insert with variable principal cutting edge angle as described in claim 1, characterized in that: Each of the blade mounting portions has a chip groove on the side surface away from the mounting slot.
6. The milling insert with variable principal cutting edge angle as described in claim 1, characterized in that: The four sides of the cutting body are the back face, and each cutting edge is the junction of the front face and the back face.
7. The milling insert with variable principal cutting edge angle as described in claim 6, characterized in that: A transition arc structure is provided between the back face and the positioning surface on the corresponding side.
8. The milling insert with variable principal cutting edge angle as described in claim 6, characterized in that: A circular arc structure is provided between two adjacent back facets for connection.
9. The milling insert with variable principal cutting edge angle as described in claim 1, characterized in that: An arc structure is provided between two adjacent positioning surfaces to connect them.