A milling cutter structure and a side milling machining device

Abstract

The utility model provides a kind of milling cutter structure and side milling processing device, milling cutter structure includes rotary drive, rotary chuck and milling cutter, the output end of rotary drive is connected rotary chuck, for driving rotary chuck autorotation;Rotary chuck is used to hold milling cutter;Milling cutter includes connecting rod and spherical head, connecting rod is used to be fixed to rotary chuck, spherical head is used to mill out preset shape in material side edge.This scheme is combined design by rotary chuck and spherical head, so that tool can be rotated while cutting the side of material.This structure does not need to transform machine tool main body, and only needs to replace tool to expand processing capacity.In addition, the curved surface design of spherical head can adapt to various processing angles, to avoid the stress concentration problem generated when traditional flat head milling cutter is cut in sideways.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical material processing, and in particular to a milling cutter structure and a side milling processing device. Background Technology

[0002] Existing cam-controlled cutting tools can only perform turning and drilling functions on materials. For products that require side machining, cam-controlled cutting tools generally cannot be used. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a milling cutter structure and a side milling processing device.

[0004] The first aspect of this utility model provides a milling cutter structure, including a rotary drive, a rotary chuck, and a milling cutter. The output end of the rotary drive is connected to the rotary chuck and is used to drive the rotary chuck to rotate. The rotary chuck is used to hold the milling cutter. The milling cutter includes a connecting rod and a spherical head. The connecting rod is used to be fixed to the rotary chuck, and the spherical head is used to mill a preset shape on the side of the material.

[0005] Optionally, the radius of the spherical head is smaller than the radius of the connecting rod, the spherical head extends out of one end face of the connecting rod, and the connection between the spherical head and one end face of the connecting rod is provided with an annular first arc chamfer.

[0006] Optionally, a second arc-shaped chamfer is provided between one end face of the connecting rod and the side wall of the connecting rod.

[0007] Optionally, the spherical head includes a cylindrical portion and a spherical portion, one end of the cylindrical portion is connected to the connecting rod, the other end of the cylindrical portion is connected to the spherical portion, and the radius of the spherical portion is the same as the radius of the cylindrical portion.

[0008] Optionally, the spherical part is a hemispherical structure, and the center of the hemispherical structure is on the same straight line as the axis of the connecting rod.

[0009] Optionally, the connecting rod includes a connecting part, a transition part, and an extension part. One end of the connecting part is connected to the rotating chuck, the other end of the connecting part is connected to one end of the transition part, the other end of the transition part is connected to the extension part, and the extension part is connected to the spherical head.

[0010] Optionally, the radius of the connecting portion is greater than the radius of the extension portion, the radius of one end of the transition portion is the same as the radius of the connecting portion, the radius of the other end of the transition portion is the same as the radius of the extension portion, and the radius of the extension portion is greater than the radius of the spherical head.

[0011] Optionally, the rotary chuck includes an external threaded connection portion and an elastic clamping portion. One end of the external threaded connection portion is connected to the rotary drive component, and the other end of the external threaded connection portion is connected to the elastic clamping portion. The connecting rod is inserted into the elastic clamping portion.

[0012] Optionally, the milling cutter structure further includes a collet fixing nut, which includes an internal threaded connection part and a clamping part. The collet fixing nut is sleeved on the outside of the rotating collet, and the internal threaded connection part and the external threaded connection part engage with each other so that the clamping part abuts against the elastic clamping part to clamp the connecting rod.

[0013] The second aspect of this utility model provides a side milling processing device, including a side milling drive mechanism and the aforementioned milling cutter structure. The milling cutter structure is connected to the output end of the side milling drive mechanism and is used to extend into the material from the side to perform material processing to form a side-processed product.

[0014] The beneficial effects of this plan are as follows:

[0015] This design combines a rotary chuck with a spherical head, enabling the cutting tool to cut the side of the material while rotating. This structure requires no modification to the machine tool itself; only the cutting tool needs to be replaced to expand machining capabilities. Furthermore, the curved surface design of the spherical head can accommodate various machining angles, avoiding the stress concentration problem that occurs with traditional flat-end mills when cutting laterally. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the milling cutter structure;

[0017] Figure 2 This is the front view of the milling cutter structure;

[0018] Figure 3 This is a cross-sectional view of the milling cutter structure;

[0019] Figure 4 for Figure 3 Enlarged view of a portion of circle A

[0020] Figure 5 This is a schematic diagram of the product structure milled from the side of the milling cutter structure in this solution.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10. Milling cutter; 11. Connecting rod; 111. Connecting part; 112. Transition part; 113. Extension part; 12. Spherical head; 121. Cylindrical part; 122. Spherical part; 101. First arc-shaped chamfer; 102. Second arc-shaped chamfer; 20. Rotary chuck; 21. External threaded connection part; 22. Elastic clamping part; 30. Rotary drive component; 40. Chuck fixing nut; 41. Internal threaded connection part; 42. Clamping part. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. For those skilled in the art, the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0025] See Figure 1-4 This embodiment discloses a milling cutter 10 structure, including a rotary drive 30, a rotary chuck 20, and a milling cutter 10. The output end of the rotary drive 30 is connected to the rotary chuck 20 to drive its rotation, and the rotary chuck 20 is used to hold the milling cutter 10. The milling cutter 10 includes a connecting rod 11 and a ball head 12. The connecting rod 11 is fixed to the rotary chuck 20, and the ball head 12 is used to mill a preset shape on the side of the material. The milling structure is shown in the figure. Figure 5 As shown.

[0026] The rotary drive component 30 refers to a mechanical device capable of outputting rotational power, specifically an electric motor or hydraulic motor, used to provide the rotational power required for cutting the milling cutter 10. The rotary chuck 20 refers to a rotating component with a clamping function, specifically a structure with elastic jaws, used to stably fix the milling cutter 10 during rotation. The connecting rod 11 refers to a rod-shaped component for transmitting rotational power, specifically a cylindrical metal rod, used to rigidly connect the rotary chuck 20 to the cutting part. The spherical head 12 refers to a cutting component with a spherical structure, specifically made of cemented carbide material, used to form an arc-shaped or curved surface structure on the side of the material through rotational contact.

[0027] Specifically, the rotary drive 30 is connected to the rotary chuck 20 via an output shaft. When the drive is activated, the rotary chuck 20 drives the milling cutter 10 to rotate at high speed around its own axis. One end of the connecting rod 11 is clamped inside the rotary chuck 20, and the other end extends to the machining area and connects to the ball head 12. During side milling, the ball head 12 contacts the side of the material at an inclined angle and cuts the material through rotational motion. Due to the curved surface characteristics of the ball head 12, a smooth transition machining surface can be formed at different entry angles, thereby milling a preset arc or irregular contour on the side of the material.

[0028] Compared to existing technologies, traditional cam-type milling cutters can only perform axial turning or drilling, and cannot perform side milling. This solution, through the combined design of a rotary chuck 20 and a ball head 12, enables the cutter to cut the side of the material while rotating. This structure requires no modification to the machine tool body; only the cutting tool needs to be replaced to expand the machining capabilities. In addition, the curved surface design of the ball head 12 can adapt to various machining angles, avoiding the stress concentration problem caused by traditional flat-end mills 10 when cutting sideways.

[0029] Through the above technical solution, this application enables side milling on existing cam machines, effectively expanding the equipment's functional range. Operators can complete the machining of complex side structures without transferring the workpiece, significantly improving production efficiency. The curved cutting characteristics of the spherical head 12 reduce burrs and stress concentration on the machined surface, improving product surface quality. This structure is simple, reliable, easy to install and replace, reducing equipment modification costs and maintenance difficulty.

[0030] See further Figure 4 The radius of the spherical head 12 is smaller than the radius of the connecting rod 11. The spherical head 12 extends out of one end face of the connecting rod 11. The connection between the spherical head 12 and one end face of the connecting rod 11 is provided with an annular first arc chamfer 101.

[0031] Specifically, when the rotary drive 30 drives the connecting rod 11 to rotate at high speed, the spherical head 12 performs lateral milling on the material. Since the radius of the spherical head 12 is smaller than the radius of the connecting rod 11, the stepped structure formed at their junction achieves a smooth transition through the first arc-shaped chamfer 101. During milling, when the cutting force is transmitted to the spherical head 12 through the connecting rod 11, the arc-shaped chamfer structure makes the stress distribution more uniform, avoiding stress concentration at the right-angle step. Simultaneously, the continuous annular structure of the chamfer ensures symmetrical force distribution during rotation, preventing tool imbalance caused by localized wear.

[0032] In this embodiment, a second arc-shaped chamfer 102 is provided between one end face of the connecting rod 11 and the side wall of the connecting rod 11.

[0033] The second arc-shaped chamfer 102 refers to the continuous curved surface transition structure formed between the end face edge and sidewall of the connecting rod 11. This can be achieved using circular arc cutting or grinding processes, and its radius of curvature can be adjusted according to material strength and processing requirements. This chamfer reduces the sharpness of stress concentration areas by eliminating right-angle edges. This solution uses the second arc-shaped chamfer 102 to create a smooth transition, effectively dispersing stress concentration areas and improving the matching between the connecting rod 11 and the chuck contact surface during assembly.

[0034] In this embodiment, the spherical head 12 includes a cylindrical portion 121 and a spherical portion 122. One end of the cylindrical portion 121 is connected to a connecting rod 11, and the other end of the cylindrical portion 121 is connected to the spherical portion 122. The radius of the spherical portion 122 is the same as the radius of the cylinder of the cylindrical portion 121. When the milling cutter 10 is fixed to the rotary chuck 20 via the connecting rod 11, the cylindrical portion 121 acts as a transition section, transmitting the rotational driving force to the spherical portion 122, causing the spherical portion 122 to mill the material side. Since the radius of the spherical portion 122 is equal to the radius of the cylinder of the cylindrical portion 121, a continuous transition is formed in the connection area between the spherical portion 122 and the cylindrical portion 121 during the cutting process, thereby reducing cutting resistance and lowering the risk of tool breakage. During side milling, the spherical portion 122 performs arc-shaped cutting on the material through rotational motion, while the cylindrical portion 121 provides axial support, ensuring the stability of the milling cutter 10 during lateral feed.

[0035] In this embodiment, the spherical part 122 is a hemispherical structure, with the center of the hemispherical structure and the axis of the connecting rod 11 aligned on the same straight line. A hemispherical structure refers to a symmetrical geometric shape formed by cutting a sphere along its diameter plane; specifically, this can be achieved by symmetrical machining, where the sphere is axially cut into two parts. This symmetrical design ensures uniform distribution of cutting force, reducing vibration and offset during machining. The hemispherical structure contacts the material through its symmetrical curved contour, forming a continuous and uniform cutting trajectory during rotation. The coaxial arrangement of the sphere's center and the axis of the connecting rod 11 ensures that the cutting force of the milling cutter 10 is always transmitted along the axis of rotation during side milling, avoiding the influence of lateral forces on tool stability. Therefore, the machined surface on the side of the material can maintain the geometric accuracy of the preset shape, and the surface quality is effectively controlled.

[0036] In this embodiment, the connecting rod 11 includes a connecting portion 111, a transition portion 112, and an extension portion 113. One end of the connecting portion 111 is connected to the rotary chuck 20, and the other end of the connecting portion 111 is connected to one end of the transition portion 112. The other end of the transition portion 112 is connected to the extension portion 113, and the extension portion 113 is connected to the spherical head 12. The radius of the connecting portion 111 is larger than the radius of the extension portion 113. The radius of one end of the transition portion 112 is the same as the radius of the connecting portion 111, and the radius of the other end of the transition portion 112 is the same as the radius of the extension portion 113. The radius of the extension portion 113 is larger than the radius of the spherical head 12. The connecting portion 111 is configured as a cylindrical structure to fit the clamping space of the rotary chuck 20. The transition portion 112 achieves a smooth transition between the connecting portion 111 and the extension portion 113 through a tapered profile. The extension portion 113 reduces the overall weight by having a smaller radius, while ensuring bending strength during cutting by having a radius larger than the spherical head 12. When the milling cutter 10 rotates at high speed, the connecting part 111 and the rotating chuck 20 closely cooperate to transmit torque, the transition part 112 disperses the cutting reaction force through the gradual structure, and the extension part 113 reduces the vibration amplitude while supporting the spherical head 12.

[0037] In this embodiment, the rotary chuck 20 includes an externally threaded connection portion 21 and an elastic clamping portion 22. One end of the externally threaded connection portion 21 is connected to the rotary drive component 30, and the other end is connected to the elastic clamping portion 22. The connecting rod 11 is inserted into the elastic clamping portion 22. The externally threaded connection portion 21 refers to a shaft segment with external threads, which can be achieved by machining a metal material to form a threaded structure. It is used to form a threaded connection with the output end of the rotary drive component 30 to ensure the stability of power transmission. The elastic clamping portion 22 refers to a clamping component with radial contraction capability. It can be achieved by using a sleeve structure with an axial gap. Clamping force is generated through elastic deformation to fix the inserted connecting rod 11. In actual production, part of the externally threaded connection portion 21 may be located on the periphery of the elastic clamping portion 22 to ensure that the elastic clamping portion 22 retracts inward after the threaded connection.

[0038] In this embodiment, the milling cutter 10 structure also includes a collet fixing nut 40, which includes an internal threaded connection portion 41 and a clamping portion 42. The collet fixing nut 40 is sleeved on the outside of the rotating collet 20. The internal threaded connection portion 41 and the external threaded connection portion 21 mesh with each other, causing the clamping portion 42 to abut against the elastic clamping portion 22 and clamp the connecting rod 11. When the internal threaded connection portion 41 of the collet fixing nut 40 is screwed into the external threaded connection portion 21 of the rotating collet 20, the conical structure of the clamping portion 42 moves axially along the elastic clamping portion 22. As the thread engagement depth increases, the inclined surface of the clamping portion 42 contacts the outer wall of the elastic clamping portion 22, generating a radial compressive force, which forces the slotted portion of the elastic clamping portion 22 to contract and deform inward. At this time, the connecting rod 11 inserted into the elastic clamping portion 22 is evenly wrapped, forming a stable clamping state with three-point contact. In this process, the axial force generated by the thread engagement is converted into a radial clamping force, achieving self-locking without the need for additional torque.

[0039] In some specific embodiments, the clamp fixing nut 40 can adopt a split structure design, for example, the internal thread connection part 41 and the clamping part 42 can be machined separately and then welded together. The cone angle of the clamping part 42 can be set to 15 degrees to 30 degrees to balance the relationship between axial locking force and radial deformation. The elastic clamping part 22 can have four evenly distributed axial grooves to form a four-jaw elastic clamping structure.

[0040] Through the above technical solution, this application achieves stable clamping of the milling cutter 10 under high-speed rotation conditions, ensuring that the spherical head 12 maintains a precise trajectory during side milling. The mating structure of the elastic clamping part 22 and the collet fixing nut 40 effectively absorbs machining vibrations, avoiding excessive waviness on the machined surface due to loose clamping, and meeting the stringent requirements for tool positioning accuracy in side milling.

[0041] In this embodiment, a side milling drive mechanism and a milling cutter 10 structure are included. The milling cutter 10 structure is connected to the output end of the side milling drive mechanism and is used to extend into the material from the side to perform material processing to form a side-machined product.

[0042] The side milling drive mechanism refers to the power device that drives the milling cutter 10 structure to move laterally. Specifically, it can be implemented using a cam machine, servo motor, or hydraulic cylinder. Its function is to provide lateral feed power to the milling cutter 10 structure, allowing the milling cutter 10 to extend into the material from the side. The milling cutter 10 structure refers to a combined device including a rotary drive component 30, a rotary chuck 20, and the milling cutter 10. Specifically, the milling cutter 10 can be fixed using elastic clamping or threaded connection. Its function is to clamp the milling cutter 10 through the rotary chuck 20 and transmit the rotary driving force, ensuring the stability and machining accuracy of the milling cutter 10 during lateral cutting. When machining metal materials, the side milling drive mechanism pushes the milling cutter 10 laterally to the side of the workpiece. The spherical head 12 continuously cuts the material during rotation, ultimately forming a side structure with curved surfaces or grooves.

[0043] Compared with existing technologies, traditional cam machines can only perform single-axis machining such as turning or drilling, and cannot perform side milling. This solution adds a side milling drive mechanism, enabling the milling cutter 10 to have lateral feed capability. At the same time, combined with the multi-angle cutting characteristics of the ball head milling cutter 10, it can directly machine complex contours on the side of the material without the need for multiple clamping or tool changes.

[0044] Through the above technical solution, this application realizes direct milling of the side of the material, solving the problem that traditional equipment cannot handle side structures. For example, when machining mechanical parts with lateral grooves, side milling can be completed in one clamping, avoiding positioning errors caused by multiple machining operations, improving machining efficiency and reducing scrap rate.

[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A milling cutter structure, characterized in that, The device includes a rotary drive, a rotary chuck, and a milling cutter. The output end of the rotary drive is connected to the rotary chuck and is used to drive the rotary chuck to rotate. The rotary chuck is used to hold the milling cutter. The milling cutter includes a connecting rod and a ball head. The connecting rod is used to fix it to the rotary chuck, and the ball head is used to mill a preset shape on the side of the material.

2. The milling cutter structure according to claim 1, characterized in that, The radius of the spherical head is smaller than the radius of the connecting rod. The spherical head extends out of one end face of the connecting rod, and the connection between the spherical head and one end face of the connecting rod is provided with an annular first arc chamfer.

3. The milling cutter structure according to claim 1, characterized in that, A second arc-shaped chamfer is provided between one end face of the connecting rod and the side wall of the connecting rod.

4. The milling cutter structure according to claim 1, characterized in that, The spherical head includes a cylindrical part and a spherical part. One end of the cylindrical part is connected to the connecting rod, and the other end of the cylindrical part is connected to the spherical part. The radius of the spherical part is the same as the radius of the cylindrical part.

5. The milling cutter structure according to claim 4, characterized in that, The spherical part is a hemispherical structure, and the center of the hemispherical structure is on the same straight line as the axis of the connecting rod.

6. The milling cutter structure according to claim 2, characterized in that, The connecting rod includes a connecting part, a transition part, and an extension part. One end of the connecting part is connected to the rotating chuck, the other end of the connecting part is connected to one end of the transition part, the other end of the transition part is connected to the extension part, and the extension part is connected to the spherical head.

7. The milling cutter structure according to claim 6, characterized in that, The radius of the connecting portion is greater than the radius of the extension portion. The radius of one end of the transition portion is the same as the radius of the connecting portion, and the radius of the other end of the transition portion is the same as the radius of the extension portion. The radius of the extension portion is greater than the radius of the spherical head.

8. The milling cutter structure according to claim 1, characterized in that, The rotary chuck includes an external threaded connection part and an elastic clamping part. One end of the external threaded connection part is connected to the rotary drive component, and the other end of the external threaded connection part is connected to the elastic clamping part. The connecting rod is inserted into the elastic clamping part.

9. The milling cutter structure according to claim 8, characterized in that, The milling cutter structure also includes a collet fixing nut, which includes an internal threaded connection part and a clamping part. The collet fixing nut is sleeved on the outside of the rotating collet, and the internal threaded connection part and the external threaded connection part mesh with each other so that the clamping part abuts against the elastic clamping part to clamp the connecting rod.

10. A side milling processing device, characterized in that, It includes a side milling drive mechanism and a milling cutter structure as described in any one of claims 1-9, the milling cutter structure being connected to the output end of the side milling drive mechanism for extending into the material from the side to perform material operations to form a side-machined product.

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