Cutter head and cutting device

Abstract

The utility model discloses a cutterhead and a cutting device, the cutterhead comprises an annular cutterhead main body and a driving part arranged on the inner side of the cutterhead main body; the cutterhead main body is provided with at least two cutter fixing holes along the axial direction of the cutterhead main body, and the cutter fixing holes are uniformly distributed along the cutterhead main body; the driving part comprises a center connecting body and a plurality of supports, the center connecting body and the cutterhead body are coaxially arranged, and the two ends of each support are connected with the cutterhead body and the center connecting body respectively. The cutter head has the advantages of being light in weight, high in precision, convenient to install and the like, can meet the machining requirement of a small CNC machine tool for a high-precision probe head, improves the machining efficiency, and meanwhile prolongs the service life of a cutter.

Description

Technical Field

[0001] The utility model relates to the technical field of cutter heads, in particular to a cutter head and a cutting device. Background Art

[0002] In the manufacturing process of new energy battery detection probe array multi-crown head products, traditional processing methods mainly rely on milling cutter type tools. Such tools are usually installed at the power position on the side of the front axle. However, in actual applications, milling cutter type tools expose defects such as low processing efficiency, insufficient processing accuracy, and unstable product quality. These defects seriously affect the manufacturing quality and production efficiency of products and cannot meet the current market demand for high-precision and high-quality products.

[0003] The utility model patent CN202910363U discloses a face milling cutter, which mainly includes a cutter head body, a plurality of tool holders, a plurality of blades, and a plurality of pressing members. The cutter head body is provided with a plurality of accommodating grooves at equal intervals on its outer peripheral surface, each accommodating groove is rectangular, the plurality of tool holders are correspondingly accommodated in each accommodating groove, each blade is respectively arranged on each tool holder, and the plurality of pressing members are respectively arranged in each accommodating groove and can be adjusted to tightly press against the side of each blade. The utility model patent CN216990058U discloses a milling cutter head for machining, including a tool holder and a tool rest fixedly installed with the tool holder. The tool holder is provided with a first threaded hole, a balance screw is threadedly connected in the first threaded hole, an installation groove is provided on the outer peripheral surface of the tool rest, a blade is installed in the installation groove, a through groove and a first countersunk hole communicated with the through groove are provided on the blade, and the blade is fixed on the bottom wall of the installation groove through a fastening screw passing through the through groove.

[0004] Existing cutter heads all have problems such as complex structure, large weight, and large volume, and are difficult to be applied to the production of small high-precision devices and products. Therefore, how to optimize the structural layout and overall design of the cutter head to obtain a cutter head with light weight, high precision, convenient installation, and stable operation to meet the processing requirements of high-precision probe heads for small high-precision devices is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] In view of the above-mentioned defects existing in the prior art, the utility model provides a cutter head and a cutting device, which adopt a cutter head with light weight, high precision, convenient installation, and stable operation, meet the processing requirements of high-precision products, especially high-precision probe heads, for high-precision devices such as small CNC machine tools, and improve the processing efficiency and extend the service life of the tool.

[0006] In a first aspect, the utility model provides a cutter head, including an annular cutter head body and a driving part arranged inside the cutter head body:

[0007] There are at least two tool fixing holes provided along the axial direction of the cutter head body, and the tool fixing holes are evenly distributed along the cutter head body;

[0008] The driving part includes a central connecting body and a plurality of brackets. The central connecting body is coaxially arranged with the cutter head body, and both ends of each bracket are respectively connected to the cutter head body and the central connecting body.

[0009] The cutter head of the present utility model can carry multiple tools, and correspondingly design multiple tool fixing holes. In order to balance the force during the operation of the cutter head, the tools are evenly distributed along the cutter head body. Moreover, for the multiple tool fixing holes, a plurality of brackets are correspondingly provided. The number of brackets is preferably greater than or equal to the number of tool fixing holes, so that each tool fixing hole corresponds to at least one bracket, thereby providing sufficient cutting driving force to the carried tools through the driving part.

[0010] Preferably, the cutter head body is circular ring-shaped, and there are two tool fixing holes. The two tool fixing holes are distributed at 180° along the circumferential direction of the cutter head body. Optionally, there are three tool fixing holes. The three tool fixing holes are distributed at 120° along the circumferential direction of the cutter head body. Optionally, there are four tool fixing holes. The four tool fixing holes are distributed at 90° along the circumferential direction of the cutter head body. And so on. When there are n tool fixing holes, the n tool fixing holes are distributed at 360° / n along the circumferential direction of the cutter head body. By arranging the tool fixing holes evenly distributed on the cutter head body, the balanced installation of the tools is ensured, effectively avoiding the problems of cutter head eccentricity or vibration caused by uneven tool distribution. The design of symmetrically distributed tool fixing holes ensures the stability of the cutter head during high-speed rotation, improving the accuracy and quality during the processing. In order to ensure the advantages of simple structure, small volume, light weight, etc. of the cutter head suitable for fine operation, the number of tools is not easy to design too many.

[0011] The cutter head body is designed as circular ring-shaped, not limited to a circular ring with absolutely regular shape. The present utility model has an open understanding of the circular ring shape, including an inner circumference and an outer circumference, and the inner diameter corresponding to the inner circumference is not unique, and the outer diameter corresponding to the outer circumference is not unique either, that is, the thickness of the circular ring in its radial direction is not unique. As long as it shows an axisymmetric or central symmetric structure similar to a circular ring, it can be adjusted and designed according to the needs of load bearing and force.

[0012] Furthermore, one of the brackets is connected to the inner side wall of the cutter head body corresponding to each tool fixing hole.

[0013] The utility model ensures that each tool fixing hole can be effectively supported by the bracket on the inner side of the cutter head body through the above design, thereby enhancing the overall rigidity of the cutter head and the fixing stability of the tool. In addition, the number and position of the brackets provided are not limited to being connected to the inner side of the cutter head body corresponding to the tool fixing holes, and can be adjusted according to actual needs. For example, when using a cutter head body with two tool fixing holes, four brackets can be tried, two of which are correspondingly connected to the inner side walls of the cutter head body corresponding to the tool fixing holes, and the other two are arranged in a way perpendicular to the above two brackets respectively, that is, the four brackets are evenly distributed at 90° on the inner side of the cutter head body. In specific application scenarios and tool fixing hole settings, the number of brackets can be increased or decreased, but the number of brackets needs to be greater than or equal to the number of tool fixing holes to adapt to different cutter head structures and processing requirements.

[0014] The utility model connects the cutter head body and the central connecting body by setting a plurality of brackets, and at the same time supports and fastens the tool fixing holes through the brackets, enhancing the structural rigidity of the cutter head and preventing the cutter head from deforming during high-speed operation. At the same time, the uniform distribution of the brackets also helps to reduce the inertial change during the rotation of the cutter head, thereby improving the processing accuracy and service life of the cutter head.

[0015] Further, the cutter head body includes a reinforcing part, and the tool fixing hole is arranged in the reinforcing part. In the reinforcing part, the corresponding inner diameter of the cutter head body decreases, and the distance between the inner side wall and the outer side wall of the cutter head body increases. Arranging the tool fixing hole in the reinforcing part is beneficial to improving the supporting and driving effect on the fastened tool. Due to the decrease in the inner diameter, the length of the bracket corresponding to the reinforcing part provided with the tool fixing hole is shorter than the length of the bracket corresponding to the non-reinforcing part.

[0016] Further, the driving part includes an assembly shaft extending along its axial direction. The assembly shaft is arranged at the center of the driving part and extends along its axial direction, enabling it to stably and simply connect the cutter head with an external processing device and drive the cutter head to work.

[0017] Further, the cutter head body and the driving part are of an integral structure. The cutter head body and the driving part can be manufactured step by step and then fixed, but it is more preferably designed and manufactured integrally, which not only improves the overall strength but also simplifies the manufacturing process.

[0018] Further, the cutter head body includes a locking hole penetrating the cutter head body and communicating with the tool fixing hole.

[0019] Further, the outer side wall of the cutter head body includes a concave surface, and the locking hole penetrates the concave surface and communicates with the tool fixing hole.

[0020] Further, the outer side wall of the cutter head body includes a stepped portion, and the stepped portion at least includes a first plane and a second plane extending along the axial direction of the cutter head body. The locking hole penetrates the first plane or the second plane and communicates with the tool fixing hole.

[0021] Furthermore, each tool fixing hole corresponds to at least two locking holes.

[0022] By screwing locking elements (such as bolts, screws, etc.) into the locking holes, pressing or passing through the fixing part of the tool arranged in the tool fixing hole, the tool is fixed on the cutter head and the cutting effect is achieved with the rotation of the cutter head. There are multiple choices for the specific positions of the locking holes, as long as the fixing and synchronous movement of the tool and the cutter head can be achieved. When multiple locking holes are provided, the locking holes can be located on the same side or different sides of the tool to achieve multi-directional / angle locking of the tool. Preferably, the axis of the locking hole intersects with the axis of the tool fixing hole, and more preferably, the two axes are perpendicular, so that the maximum acting force of the locking bolt or screw reaches the tool, improving the overall operating stability and extending the service life of the cutter head and the tool.

[0023] When at least two locking holes are provided in the stepped portion, the locking holes can be located in the first plane or the second plane of the stepped portion and arranged in sequence along the axis of the tool fixing hole, so as to provide sufficient squeezing force on the inserted tool to fasten the tool to the inner wall of the tool fixing hole. In addition, multiple locking holes can also be distributed on different sides. For example, the locking holes are respectively arranged on the concave surface of the outer side wall of the cutter head body facing the tool fixing hole and the first plane or the second plane of the stepped portion, so as to play a fastening role on the tool in multiple directions.

[0024] Furthermore, the first plane and the second plane of the stepped portion are perpendicular to each other, wherein the second plane is set to be parallel to the axis of the bracket corresponding to the tool fixing hole, and the two locking holes penetrate through the second plane and communicate with the tool fixing hole. The locking device designed and installed in this way can cooperate with the rotation direction of the cutter head body during installation, and has at least the following advantages:

[0025] (1) The locking force can be more evenly transmitted to the tool, enhancing the fixing effect of the locking device and effectively preventing the displacement or loosening of the tool caused by centrifugal force or cutting force during high-speed rotation;

[0026] (2) The locking device installed perpendicular to the second plane can better resist the shear force generated by rotation, ensuring that the tool always remains in the predetermined position during processing, thereby improving the stability and accuracy of processing.

[0027] In the second aspect, the present invention provides a cutting device including the cutter head. The cutter head of the present invention can be combined with a variety of driving devices, so as to obtain a cutting device with a wide processing range, high precision and stable operation, and has broad application prospects.

[0028] The present invention has at least the following beneficial effects:

[0029] (1) By optimizing the structural design of the cutter head body and the driving part, the integrated cutter head body and driving part present an openwork weight-reducing design supported by multiple brackets, effectively reducing the occupied space volume and overall weight while ensuring structural strength and rigidity, enhancing the operational convenience of the cutter head, facilitating installation and use on the back spindle power tool holder of a small CNC machine tool, and being conducive to further improving production efficiency and process accuracy.

[0030] (2) In the present utility model, a plurality of tool fixing holes are designed on the cutter head body, which are evenly distributed along the circumference of the cutter head body and penetrate the cutter head body, and locking holes communicated with the tool fixing holes are provided to enhance the fixing effect of the tool and cutting stability. Compared with the traditional fixing method of milling cutters, which is prone to tool loosening or offset due to uneven force during the machining process, leading to safety risks, the present utility model effectively improves the fixing stability of the tool, enabling the tool to withstand greater cutting forces during the machining process without loosening, ensuring the stability of the tool during high-speed cutting, thereby improving the machining accuracy and product quality. Description of the Drawings

[0031] Figure 1 is a structural diagram of a cutter head provided by the present utility model;

[0032] Figure 2 is an assembly schematic diagram of the cutter head and the tool of the present utility model;

[0033] Figure 3 is a top view of a cutter head provided by the present utility model;

[0034] Figure 4 is a front view of a cutter head provided by the present utility model.

[0035] Description of the Reference Numerals: 1 - driving part, 11 - central connecting body, 12 - bracket, 13 - assembly shaft, 2 - cutter head body, 21 - tool fixing hole, 22 - locking hole, 23 - stepped part, 231 - first plane, 232 - second plane, 24 - reinforcing part, 3 - tool. Detailed Embodiment

[0036] In order to better understand the above technical solutions, the following will describe the above technical solutions in detail in conjunction with the accompanying drawings of the specification and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] The terms used in the embodiments of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The singular forms "a", "the", and "said" used in the embodiments of the present utility model and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Multiple" generally includes at least two.

[0038] It should also be noted that the term "comprising", "including", or any other variant thereof is intended to cover non-exclusive inclusion, such that a commodity or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the commodity or device including said element.

[0039] The following will further elaborate on the present utility model in conjunction with the accompanying drawings. As Figures 1-4 shown, for the sake of convenience of description, the space is divided into the X direction, Y direction, and Z direction along the center point of the cutter head. Among them, the X direction, Y direction, and Z direction are perpendicular to each other in pairs.

[0040] The present utility model provides a cutter head, preferably a cutter head body 2 and a driving part 1 integrally manufactured with die steel. Among them, the cutter head body 2 includes a plurality of tool fixing holes 21 and several locking holes 22, and the driving part 1 includes a central connecting body 11, a plurality of brackets 12, and an assembly shaft 13. Specifically:

[0041] (1) Driving part 1:

[0042] The driving part 1 includes a central connecting body 11 and a plurality of brackets 12, and an assembly shaft 13 connected to the side of the central connecting body 11. The central connecting body 11, the assembly shaft 13, and the cutter head body 2 are coaxially arranged (the axis along the Z direction), and both ends of each bracket 12 are respectively connected to the cutter head body 2 and the central connecting body 11.

[0043] The number of brackets 12 is greater than or equal to the number of tool fixing holes 21 and is evenly distributed radially between the central connecting body 11 and the cutter head body 2. At least one of the brackets 12 is connected to the inner side wall of the cutter head body 2 corresponding to each tool fixing hole 21, and the extension line of the axis of the bracket 12 (the axis along the X direction) intersects with the axis of the tool fixing hole 21 (parallel to the Z direction), so as to better transmit the driving force from the bracket 12 to the cutter head body 2, especially the tool 3 fixed on the cutter head body 2.

[0044] (3) Cutter head body 2:

[0045] The cutter head body 2 has an annular structure with a hollow middle part, preferably a circular ring shape, and is provided with at least two tool fixing holes 21 along its axial direction (Z direction). The tool fixing holes 21 are evenly distributed along the cutter head body 2.

[0046] The number and positional relationship of the tool fixing holes 21 are as follows: there are n tool fixing holes 21, and the n tool fixing holes 21 are distributed along the circumferential direction of the cutter head body 2 at 360° / n. For example, when using 2 tool fixing holes 21, they are distributed along the circumferential direction of the cutter head body 2 at 180°.

[0047] The cutter head further includes a number of locking holes 22, and each tool fixing hole 21 corresponds to at least one locking hole 22:

[0048] The locking holes 22 penetrate through the cutter head body 2. Preferably, the axis of the locking hole 22 (parallel to the Y direction) is perpendicular to the axis of the tool fixing hole 21 (parallel to the Z direction), so that the fastening device and the tool 3 form a mutually perpendicular fastening method.

[0049] Optionally, the opening of the locking hole 22 is located on the concave surface of the outer side wall of the cutter head body 2 and penetrates through the concave surface to communicate with the tool fixing hole 21; or

[0050] A stepped portion 23 on the outer side wall. The stepped portion 23 includes a first plane 231 and a second plane 232 extending along the axial direction of the cutter head body 2 (along the Z direction). The locking hole 22 penetrates through the first plane 231 or the second plane 232 and communicates with the tool fixing hole 21. Preferably, the first plane 231 is perpendicular to the second plane 232, and the second plane 232 is parallel to the axis (X direction) of the bracket 12 corresponding to the tool fixing hole 21.

[0051] Furthermore, each tool fixing hole 21 can correspond to multiple locking holes 22. For example, when corresponding to two locking holes 22, the two locking holes 22 are both located on the second plane 232 of the stepped portion 23. Preferably, the axis of the locking hole 22 intersects with the axis of the tool fixing hole 21, and more preferably, the two axes are perpendicular.

[0052] Furthermore, the cutter head body 2 includes a reinforcing portion 24, and the tool fixing holes 21 are arranged in the reinforcing portion 24. In the reinforcing portion 24, the corresponding inner diameter of the cutter head body 2 decreases, and the distance between the inner side wall and the outer side wall of the cutter head body 2 increases. Arranging the tool fixing holes 21 in the reinforcing portion 24 is beneficial to improving the supporting and driving effect on the fastened tool 3. Due to the decrease in the inner diameter, the length of the bracket corresponding to the reinforcing portion 24 provided with the tool fixing holes 21 is shorter than the length of the bracket corresponding to the non-reinforcing portion.

[0053] Regarding the specific dimensions of the cutter head, for the manufacturing of high-precision products, on the basis of meeting the requirements of strength and stability, it is more preferable to reduce the solid volume and weight of the cutter head. For example, the outer diameter of the annular cutter head body 2 is 40 - 80 mm, the inner diameter is 30 - 70 mm, and the thickness along its axial direction (Z direction) is 8 - 20 mm. The inner diameter of the tool fixing hole is 4 - 8 mm, and the distance between the axis of the tool fixing hole 21 (or the rotation center of the tool tip) and the axis of the cutter head body 2 is 15 - 35 mm. Correspondingly, the outer diameter of the central connecting body 11 of the driving part 1 is 1 / 5 to 2 / 5 of the inner diameter of the cutter head body 2, and the width of the bracket 12 perpendicular to the axis (X direction or Y direction) is 3 - 6 mm. The diameters of the tool fixing hole 21 and the locking hole 22 can be selected according to the size of the tool to be fixed.

[0054] On the basis of the above-mentioned complete and clear cutter head structure, the present utility model further provides a cutting device including the above-mentioned cutter head. The cutting device includes the above-mentioned cutter head, corresponding tools, and a driving device connected to the assembly shaft of the cutter head and driving the cutter head.

[0055] Embodiment

[0056] For the cutter head of this embodiment, the driving part 1 and the cutter head body 2 are integrally formed by die steel, where:

[0057] (1) Driving part 1:

[0058] The driving part 1 includes a central connecting body 11, four brackets 12, and an assembly shaft 13 extending axially along the central connecting body 11. The central connecting body 11 is coaxially arranged with the cutter head body 2. The four brackets 12 are evenly arranged at 90° between the central connecting body 11 and the cutter head body 2, and both ends of each bracket 12 are respectively connected to the cutter head body 2 and the central connecting body 11.

[0059] (2) Cutter head body 2:

[0060] The cutter head body 2 is a circular ring structure with a hollow middle part. Along its axial direction, there are two tool fixing holes 21. The tool fixing holes 21 are distributed at 180° along the circumferential direction of the cutter head body 2, and the two tool fixing holes 21 are respectively arranged on the strengthening part 24 of the cutter head body 2. In the area of the strengthening part 24, the corresponding inner diameter of the cutter head body 2 decreases, and the distance between the inner side wall and the outer side wall of the cutter head body 2 increases. The length of the bracket 12 corresponding to the strengthening part 24 is shorter than the length of the bracket 12 corresponding to the non-strengthening part. See the attached Figures 1-3 .

[0061] The cutter head body 2 is provided with a stepped part 23, including a first plane 231 and a second plane 232 extending axially along the cutter head body 2. The first plane 231 is perpendicular to the second plane 232, and the second plane 232 is parallel to the axis of the bracket 12 corresponding to the tool fixing hole 21.

[0062] Each tool fixing hole 21 corresponds to two locking holes 22. The two locking holes 22 are arranged in sequence along the axis of the tool fixing hole 21 in the second plane 232, and the locking holes 22 penetrate through the cutter head body 2.

[0063] In this embodiment, the diameter of the cutter head body 2 is 60 mm, the inner diameter of the tool fixing hole 21 is 6.5 mm, the diameter of the cutting tool 3 carried is 6 mm, and the distance between the rotational centers of the tips of the two cutting tools 3 is 50 mm.

[0064] The cutter head of this embodiment can receive and fasten a variety of tools, and can be connected to a variety of driving devices to jointly form a cutting device (not shown).

[0065] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the technical concept of the present invention, the present invention also intends to include these modifications and variations.

Claims

1. A cutter disc, characterized in that: It includes an annular cutter disc body and a driving part arranged inside the cutter disc body: At least two tool fixing holes are arranged on the cutter disc body along its axial direction, and the tool fixing holes are evenly distributed along the cutter disc body; The driving part comprises a central connecting body and a plurality of brackets. The central connecting body is coaxially arranged with the cutter disc body, and two ends of each bracket are respectively connected to the cutter disc body and the central connecting body.

2. The cutter head according to claim 1, characterized in that: The cutter disc body is in the shape of a circular ring, and has two cutter fixing holes, which are distributed 180° along the circumferential direction of the cutter disc body.

3. The cutter head according to claim 1, characterized in that: A bracket is connected to the inner side wall of the cutter disc body corresponding to each cutter fixing hole.

4. The cutter head according to claim 1, characterized in that: The driving portion includes a fitting shaft extending along an axial direction thereof.

5. The cutter disc according to any one of claims 1 to 4, characterized in that: The cutter disc body and the driving part are an integrated structure.

6. The cutter disc according to any one of claims 1 to 4, characterized in that: The cutter disc body includes a locking hole which passes through the cutter disc body and is connected with the cutter fixing hole.

7. The cutter head according to claim 6, characterized in that: The outer side wall of the cutter disc body comprises a concave surface, and the locking hole penetrates through the concave surface and is connected to the cutter fixing hole.

8. The cutter head according to claim 6, characterized in that: The outer side wall of the cutter disc body includes a step portion, which includes at least a first plane and a second plane extending axially along the cutter disc body, and the locking hole passes through the first plane or the second plane and is connected to the tool fixing hole.

9. The cutter disc according to claim 7 or 8, characterized in that: Each tool fixing hole corresponds to at least two locking holes.

10. A cutting device, characterized in that: The cutting device comprises a cutter disc as claimed in any one of claims 1-9.

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