A blade for a rotary milling cutter

Abstract

This utility model relates to the field of milling cutter technology, specifically to a cutting insert for a rotary milling cutter head, comprising a cutter head and a cutter body. The cutter head is fixed to the cutter body, which has a positioning bevel. The positioning bevel is used to engage with a wedge to press the cutter body firmly onto the cutter head. The wedge is fixed to the cutter head by screws. The cutter body includes a fixed end and a mounting end. The positioning bevel is located at the fixed end and is inclined forward from top to bottom. The mounting end has a mounting groove for mounting the cutter head, the shape of which matches the shape of the cutter head. By providing a positioning bevel on the cutter body that engages with the wedge, the cutter body can be locked onto the cutter head by the wedge. Compared with the screw fixing method in the prior art, the bevel pressing method avoids drilling holes in the cutter body, reducing the manufacturing cost of the cutter body while increasing its strength. In addition, the wedge fixing method can effectively prevent the cutter from loosening or shifting due to force during rotary milling, ensuring the accuracy and quality of rotary milling.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, and specifically to a cutting tool for a rotary milling cutter head. Background Technology

[0002] Threaded connections are a widely used type of detachable fixed connection, offering advantages such as simple structure, reliable connection, and convenient assembly and disassembly. Threads are classified into external threads and internal threads based on their location. Traditional thread processing mainly employs methods such as die making, roll forming, thread milling, and turning. External threads and studs are often produced using turning and roll forming. Currently, the machining of some large-diameter external threads and studs is generally carried out using whirl milling cutters.

[0003] Cyclone end mills are divided into internal cyclone end mills and external cyclone end mills. The cutting edge of an internal cyclone end mill is located inside the cutter head, while the cutting edge of an external cyclone end mill is located outside the cutter head. For example, Chinese patent document CN109365893B discloses a cyclone end mill with a self-cooling and lubricating structure, which includes a rotating base and multiple thread cutting inserts; a through hole is provided along the central axis of the rotating base; multiple base connection screw holes are provided along the circumferential direction of the rotating base; multiple thread cutting inserts are installed on one end face of the rotating base along the circumferential direction; it also includes multiple cooling and lubricating fluid channels provided in the rotating base, the same number as the number of thread cutting inserts; the inlet of the cooling and lubricating fluid channel is located on the outer circular surface of the rotating base and away from the thread cutting inserts; the outlet of the cooling and lubricating fluid channel is located on the inner circular surface of the rotating base and close to the thread cutting inserts; the outlet of one cooling and lubricating fluid channel is directly opposite the tip of one thread cutting insert; the rotating base and the cooling and lubricating fluid channels are all formed by 3D printing. This cyclone end mill can achieve direct cooling and lubrication of the cutting area, with good cooling uniformity and low cooling cost.

[0004] However, the above-mentioned cyclone milling cutter structure still has certain drawbacks: each thread milling cutter insert on the milling cutter disc is fixed to the rotating base by screws, which requires machining through holes on the thread milling cutter inserts for inserting screws. Since milling cutter inserts are often made of high-strength alloy materials, the setting of through holes will undoubtedly reduce the strength of the milling cutter and shorten its service life. In addition, since the milling cutter is subjected to strong vibration loads during use, fixing the milling cutter directly to the cutter holder with screws may cause the milling cutter to loosen, thereby reducing the cutting effect. Utility Model Content

[0005] This invention provides a cutting tool for a rotary milling cutter head to solve the technical problem that the use of screws for fixing existing rotary milling cutters reduces the strength of the cutter.

[0006] To solve the above problems, the present invention provides a cutting tool for a rotary milling cutter head, which adopts the following technical solution: An insert for a rotary milling cutter includes a cutter head and a cutter body, the cutter head being fixed to the cutter body, the cutter body having a positioning bevel for engaging with a wedge to press the cutter body onto the cutter head, the wedge being fixed to the cutter head by screws.

[0007] This utility model discloses a cutting insert for a rotary milling cutter. By setting a positioning bevel on the cutter body that cooperates with a wedge, the cutter body can be locked onto the cutter head by the wedge. Compared with the existing technology that uses screws for fixing, the bevel clamping method avoids drilling holes in the cutter body, reduces the manufacturing cost of the cutter body, and enhances the strength of the cutter body. In addition, the wedge fixing method can effectively prevent the cutting insert from loosening or displacing due to force during rotary milling, ensuring the accuracy and quality of rotary milling.

[0008] Furthermore, the blade body includes a fixed end and a mounting end, with the mounting end defined as the left end of the blade body. The positioning inclined surface is located at the fixed end and is inclined forward from top to bottom. The mounting end has a mounting groove for mounting the blade head, and the shape of the mounting groove matches the shape of the blade head.

[0009] Furthermore, the tilt angle of the positioning ramp is 15 degrees.

[0010] Furthermore, the feature is that the blade head has a left-convex blade tip, and the convex ridge on the left side of the blade tip is inclined to the left from back to front.

[0011] Furthermore, the blade body has a flange for supporting the blade tip, the shape of which matches the shape of the blade tip.

[0012] Its beneficial effects are as follows: by setting a flange on the cutter body that matches the shape of the cutter tip, it can provide good support and protection for the cutter tip. Since the cutter tip bears a large cutting force during the rotary milling process, the flange can enhance the strength and stability of the cutter tip, prevent the cutter tip from being damaged or deformed due to excessive force, thereby extending the service life of the cutter head and ensuring the continuity and stability of the machining process.

[0013] Furthermore, the cutting head and the cutting body are connected by welding.

[0014] Furthermore, the cutting head is made of CBN or PCD, and the cutting body is made of cemented carbide.

[0015] The beneficial effects of the insert for a rotary milling cutter provided by this utility model are: 1. The insert for a rotary milling cutter of this utility model has a positioning inclined surface on the cutter body that cooperates with a wedge, so that the cutter body can be locked on the cutter head by the wedge. Compared with the screw fixing method in the prior art, the inclined surface clamping method avoids drilling holes in the cutter body, reduces the manufacturing cost of the cutter body and enhances the strength of the cutter body. In addition, the wedge fixing method can effectively prevent the insert from loosening or displacing due to force during rotary milling, ensuring the accuracy and quality of rotary milling.

[0016] 2. The 15-degree tilt angle ensures that the wedge and the positioning inclined surface fit well together to press the cutter body, while keeping the clamping force within a suitable range. It avoids insufficient clamping force due to an angle that is too small, which could cause the cutter body to loosen easily, and also avoids making the installation process difficult due to an angle that could cause unnecessary stress concentration on the cutter body and the wedge. This enhances the installation and fixing effect of the cutter body and improves the overall integrity and stability of the cutter disc.

[0017] 3. By designing the convex edge on the left side of the cutter tip to tilt from back to front and then to the left, the friction between the cutter tip and the workpiece surface can be reduced, the surface finish of the workpiece can be improved, and the service life of the cutter head can be extended. At the same time, the sharpness of the cutter head can be increased, and the cutting ability of the cutter head can be improved.

[0018] 4. By setting a flange on the cutter body that matches the shape of the cutter tip, the cutter tip can be well supported and protected. Since the cutter tip bears a large cutting force during the rotary milling process, the flange can enhance the strength and stability of the cutter tip, prevent the cutter tip from being damaged or deformed due to excessive force, thereby extending the service life of the cutter head and ensuring the continuity and stability of the machining process. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a cutting tool for a rotary milling cutter head provided by this utility model; Figure 2 This is a schematic diagram of the blade's structure; Figure 3 This is a schematic diagram of the cutter head.

[0020] Explanation of reference numerals in the attached figures: 1. Blade body; 11. Mounting end; 12. Fixing end; 13. Positioning bevel; 14. Mounting groove; 15. Flange; 2. Blade head; 21. Blade tip; 22. Raised edge. Detailed Implementation

[0021] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0022] Embodiment 1 of an insert for a rotary milling cutter head provided by this utility model: like Figures 1 to 3As shown, the present invention provides a cutting tool for a rotary milling cutter head, comprising a tool body 1 and a cutting head 2. The tool body 1 is a rectangular block structure, including a fixed end 12 and a mounting end 11 away from the fixed end 12. The mounting end 11 is defined as the left end of the tool body 1, and the cutting head 2 is mounted on the mounting end 11 for cutting the workpiece. The fixed end 12 has a positioning inclined surface 13 to press the tool body 1 onto the cutter head by a wedge.

[0023] like Figure 1 , Figure 3 As shown, the positioning inclined surface 13 is inclined forward from top to bottom, and the right end of the positioning inclined surface 13 extends to the right end face of the cutter body 1. Its inclination angle is 15 degrees. The inclination angle of 15 degrees can ensure that the wedge block and the positioning inclined surface 13 cooperate well to press the cutter body 1, while keeping the pressing force within a suitable range. It will not cause insufficient pressing force due to the angle being too small, which would make the cutter body 1 easy to loosen, nor will it make the installation process difficult due to the angle being too large, which would cause unnecessary stress concentration on the cutter body 1 and the wedge block. This enhances the installation and fixing effect of the cutter body 1 and improves the overall integrity and stability of the cutter disc.

[0024] The wedge has a clamping slope corresponding to the positioning slope 13 to press the cutter body 1 downwards. The wedge also has a through-hole for mounting the wedge on the cutter head with screws. Compared to the screw fixing method in the prior art, the slope clamping method avoids drilling holes in the cutter body 1, reducing manufacturing costs while increasing strength. The wedge fixing method also effectively prevents the insert from loosening or shifting during rotary milling due to force, thus ensuring the accuracy and quality of rotary milling.

[0025] like Figure 3 As shown, the cutter head 2 is a triangular block with a left-protruding cutting tip 21 at its left end. The protruding ridge 22 on the left side of the cutting tip 21 extends obliquely to the left from back to front, so as to reduce the friction between the cutting tip 21 and the workpiece surface when the cutter head 2 cuts the workpiece, improve the surface processing quality of the workpiece and extend the service life of the cutter head 2, and at the same time increase the sharpness of the cutter head 2 and improve the cutting ability of the cutter head 2.

[0026] like Figure 2As shown, the mounting end 11 of the cutter body 1 has a mounting groove 14 corresponding to the cutter head 2. The shape of the mounting groove 14 matches the shape of the cutter head 2, so that the cutter head 2 is fixed in the mounting groove 14 by welding. The left end of the cutter body 1, located behind the cutter head 2, has a triangular flange 15 for supporting the cutter tip 21. The flange 15 extends from back to front and tilts to the left, and its tilt angle is consistent with the tilt angle of the protruding ridge 22 on the cutter tip 21. The front end of the flange 15 matches the rear end of the cutter tip 21 to form good support for the cutter tip 21. Since the cutter tip 21 bears a large cutting force during the rotary milling process, the flange 15 can enhance the strength and stability of the cutter tip 21, prevent the cutter tip 21 from being damaged or deformed due to excessive force, thereby extending the service life of the cutter head 2 and ensuring the continuity and stability of the machining process.

[0027] Furthermore, the cutting head 2 is made of CBN or PCD material, both of which possess extremely high hardness, wear resistance, and thermal stability. During rotary milling, these materials can withstand the high temperatures and stresses generated by high-speed cutting, maintaining the sharpness and cutting performance of the cutting head 2, thereby significantly extending its service life and ensuring machining quality. The cutting body 1 is made of cemented carbide, which has good strength, hardness, and wear resistance, while also possessing a certain degree of toughness. This provides stable support for the cutting head 2 and allows it to adapt to various complex stress conditions during rotary milling, ensuring the overall performance of the cutting tool.

[0028] The working principle of the insert for a rotary milling cutter provided by this utility model is summarized as follows: By providing a positioning bevel 13 on the cutter body 1 that cooperates with the wedge, the cutter body 1 can be locked onto the cutter head by the wedge. The bevel clamping method avoids drilling holes in the cutter body 1, maintaining the integrity of the cutter body 1 structure, reducing the manufacturing cost of the cutter body 1 while enhancing its strength, thereby extending the service life of the cutter body 1. In addition, the wedge fixing method can effectively prevent the insert from loosening or displaced due to force during rotary milling, ensuring the accuracy and quality of rotary milling. Furthermore, by providing a flange 15, the strength and stability of the cutter tip 21 can be enhanced, preventing the cutter tip 21 from being damaged or deformed due to excessive force, thereby ensuring the continuity and stability of the machining process.

[0029] Embodiment 2 of the insert for a rotary milling cutter provided by this utility model: Its main difference from Example 1 is: In Example 1, the tilt angle of the positioning ramp is 15 degrees.

[0030] In this embodiment, the tilt angle of the positioning ramp is any angle between 10 and 20 degrees, except for 15 degrees.

[0031] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0032] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A blade for a rotary milling cutter disc comprising a blade head and a blade body, the blade head being fixed to the blade body, characterised in that, The cutter body has a positioning bevel, which is used to engage with a wedge to press the cutter body firmly onto the cutter disc. The wedge is fixed onto the cutter disc by screws.

2. A blade for a drag knife cutter according to claim 1, wherein, The blade body includes a fixed end and a mounting end. The mounting end is defined as the left end of the blade body. The positioning inclined surface is located at the fixed end and is inclined from top to bottom and forward. The mounting end has a mounting groove for mounting the blade head, and the shape of the mounting groove matches the shape of the blade head.

3. A blade for a cutting head according to claim 2, wherein, The tilt angle of the positioning ramp is 15 degrees.

4. A blade for a cutting disc according to any one of claims 1 to 3, wherein The blade head has a left-convex blade tip, and the convex edge on the left side of the blade tip tilts to the left from back to front.

5. A blade for a drag knife cutter according to claim 4, wherein, The blade body has a flange for supporting the blade tip, the shape of which matches the shape of the blade tip.

6. The insert for a rotary milling cutter according to claim 5, characterized in that, The cutter head and the cutter body are connected by welding.

7. A cutting tool for a rotary milling cutter according to claim 6, characterized in that, The cutting head is made of CBN or PCD, and the cutting body is made of cemented carbide.

Images