Milling cutter and cutter assembly

Abstract

The utility model relates to the technical field of machining cutters, and particularly provides a milling cutter and a cutter assembly. The milling cutter comprises a cutter head and a plurality of blade assemblies which are arranged in the circumferential direction of the cutter head at intervals. Wherein the blade assembly comprises a tool rest and a blade arranged on the tool rest, and the tool rest is adjustably arranged on the cutter head in the radial direction of the cutter head; end cutting edges are arranged at the ends, away from the axis of the cutterhead, of the blades and extend out of the circumferential face of the cutterhead, and the distance of the end cutting edges extending out of the circumferential face of the cutterhead can be changed by adjusting the position of the tool rest. According to the milling cutter disclosed by the utility model, the assembly mode of the cutter rest on the cutter head is designed into a position-adjustable mode so as to change the distance size of the cutting edge at the end part of the blade extending out of the peripheral surface of the cutter head, and the overall machining diameter size of the milling cutter can be changed, so that the application range of the cutter in the radial machining size is enlarged.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and in particular to a milling cutter. Additionally, this utility model also relates to a tool assembly. Background Technology

[0002] Three-sided milling cutters are a common type of tool in CNC machining centers. They are characterized by multiple inserts evenly distributed along the edge of the cutter head, with cutting edges on the upper and lower surfaces and the circumferential surface of the cutter head, enabling milling operations. They are commonly used for milling stepped surfaces and grooves and are widely applied in the field of machining.

[0003] In existing three-sided cutting tools, since the outer dimensions of the cutter head are fixed, the radial machining dimension (i.e., its diameter) of the entire milling cutter is fixed, and the machined arc surface is also fixed. Each type of tool can only machine an arc surface of one size. If a certain product requires the machining of multiple arc surfaces of different sizes, a three-sided cutting tool needs to be prepared for each size. During the machining process, various tools need to be changed, which not only reduces the machining efficiency but also directly increases the product's machining and manufacturing cost.

[0004] Furthermore, existing milling cutters have fixed axial dimensions for their cutter heads. When machining grooves, they cannot meet the machining requirements of different groove widths, necessitating machine tool interpolation to ensure the width of the machined groove. This directly increases the machining time per part and leads to increased machining costs. Additionally, some existing milling cutters have two cutter heads fixedly mounted on their shanks. These are specialized tools for specific products and machining features, allowing for simultaneous machining of two positions to improve efficiency. However, when the product type and specifications change, altering the two milling positions, the tools become unsuitable, requiring the customization and replacement of a new set of tools, thus increasing product machining costs. Utility Model Content

[0005] In view of this, the present invention aims to provide a milling cutter to increase the applicability of the tool in radial machining dimensions.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A milling cutter includes a cutter head and a plurality of insert assemblies spaced circumferentially on the cutter head; each insert assembly includes a tool holder and inserts disposed on the tool holder, and the tool holder is radially and adjustablely positioned on the cutter head; each insert has an end cutting edge at one end away from the axis of the cutter head, and the end cutting edge extends beyond the cutter head radially; adjusting the position of the tool holder can change the distance by which the end cutting edge extends beyond the cutter head.

[0008] Furthermore, the edge of the cutter head is provided with a tool mounting groove, and one side wall of the tool mounting groove is set as a mounting base surface for assembling the tool holder; the mounting base surface is located on the axial section of the cutter head, and the tool holder is adjustablely mounted on the mounting base surface.

[0009] Furthermore, the mounting base surface is provided with a first adjustment groove, and the first adjustment groove is provided with a rotatable radial adjustment screw, and the bottom of the tool holder is provided with a first adjustment thread; the radial adjustment screw is screwed to the first adjustment thread, and as the radial adjustment screw rotates, the tool holder can move radially along the tool disc on the mounting base surface.

[0010] Furthermore, the mounting base surface is provided with a first lower guide tooth groove arranged radially along the cutter head, and the bottom of the tool holder is provided with a first upper guide tooth groove that matches the first lower guide tooth groove; the first lower guide tooth groove and the first upper guide tooth groove mesh with each other, which can restrict the tool holder from moving axially on the cutter head.

[0011] Furthermore, the tool holder includes a tool base and a slider disposed on the tool base, and the blade is fixedly mounted on the slider; the tool base is adjustablely disposed on the cutter disc in the radial direction, and the slider is adjustablely disposed on the tool base in the axial direction of the cutter disc; one side of the blade is provided with a side cutting edge, and in the axial direction of the cutter disc, the side cutting edge protrudes beyond the end face of one end of the cutter disc; adjusting the position of the slider on the tool base can change the distance by which the side cutting edge protrudes beyond the end face of the cutter disc.

[0012] Furthermore, the tool holder is provided with a second adjustment groove, and the second adjustment groove is provided with a rotatable axial adjustment screw, and the bottom of the slider is provided with a second adjustment thread; the axial adjustment screw is screwed to the second adjustment thread, and as the axial adjustment screw rotates, the slider can move on the tool holder along the axial direction of the tool disc.

[0013] Furthermore, the tool mounting groove is provided with a pressure block, which is used to press the slider onto the tool holder and press the tool post onto the mounting base surface.

[0014] Furthermore, the blade is disposed at the corner of the slider, and the blade assembly includes an A-type assembly and a B-type assembly with the blade disposed at different corners; the blade on the A-type assembly protrudes beyond the end face of one end of the cutter disc, and the blade on the B-type assembly protrudes beyond the end face of the other end of the cutter disc, and the A-type assembly and the B-type assembly are alternately arranged in the circumferential direction of the cutter disc.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] (1) The milling cutter of this utility model has inserts set on the cutter head by a tool holder. At the same time, the tool holder is designed to be adjustable in position. By adjusting the position of the tool holder in the radial direction of the cutter head, the distance of the cutting edge of the insert protruding from the cutter head can be changed, thereby changing the overall machining diameter of the milling cutter. When using the milling cutter to perform arc milling, the radial dimension of the machined arc surface can be changed by adjusting the position of the tool holder, thereby increasing the applicability of the tool in the radial machining dimension.

[0017] (2) By setting a tool mounting groove at the edge of the tool disc, and using the side wall and bottom wall of the tool mounting groove as the mounting base, the tool holder can be assembled on the tool disc, thus providing a good space and installation conditions for the tool holder and its cutting tools. The side wall of one side of the tool mounting groove is used as the mounting base surface. The tool holder is assembled onto the mounting base surface. When adjusting the position of the tool holder, it can be moved horizontally on the mounting base surface. This provides a reliable reference surface for the adjustment of the tool holder and also makes it easy to fix the tool holder to the mounting base surface by screwing, pressing or other methods.

[0018] (3) By opening a first adjustment groove on the mounting base and setting a radial adjustment screw in the first adjustment groove, the position of the tool holder can be adjusted by using a screwdriver, hex wrench or other tools to rotate the radial adjustment screw through a threaded drive. It has good operation convenience and structural reliability, and the processing structure is simple and the manufacturing cost is low.

[0019] (4) By setting guide tooth grooves between the mounting base and the bottom of the tool holder, not only can the tool holder be restricted from moving freely in the axial direction of the tool disc, but also a good guiding effect can be provided for the adjustment of the tool holder's position in the radial direction of the tool disc.

[0020] (5) The tool holder is designed as two parts: the tool holder and the slider. By setting the slider to be adjustable on the tool holder, the position of the insert on the tool holder can be easily changed by adjusting the position of the slider on the tool holder in the axial direction of the tool holder. In this way, the milling position of the side cutting edge of the insert can be changed, thereby meeting the requirements of different milling positions and milling widths.

[0021] (6) Similar to the method of adjusting the position of the tool holder on the mounting base, a second adjustment groove is set on the top of the tool holder, and a rotatable axial adjustment screw is set in the second adjustment groove, which can also achieve the purpose of convenient operation to adjust the axial position of the slider.

[0022] (7) By setting a pressure block on the top of the slider and fixing the pressure block to the threaded hole at the bottom of the tool mounting slot with fastening screws, the slider and tool holder are pressed against the mounting base from the top of the entire tool holder. This structure has the advantages of easy machining construction and technical implementation.

[0023] (8) By alternately setting two types of blade assemblies, A-type and B-type, on the cutter head, the blades on the A-type and B-type blades cooperate with each other to process grooves with a certain width. Moreover, by adjusting the distance of the side cutting edge of the blades on the A-type and B-type blades protruding from the end face of the cutter head, the width of the processed groove can be changed, thereby further improving the processing width range of the tool.

[0024] Another objective of this invention is to provide a tool assembly, including a tool holder and a milling cutter of this invention disposed on the tool holder.

[0025] Furthermore, the tool holder is provided with a plurality of milling cutters, and at least one of the milling cutters is adjustable in position along the axial direction of the tool holder.

[0026] The tool assembly of this utility model possesses the technical advantages of the aforementioned milling cutters. Furthermore, by mounting multiple milling cutters on the tool holder, multiple workpieces or milling stations can be machined simultaneously. Moreover, by setting a milling cutter to be axially adjustable on the tool holder, the distance between the milling cutters can be adjusted, thereby meeting the needs of different machining stations, machining widths, and radial dimensions, and achieving the goal of machining more dimensions with a single tool. Attached Figure Description

[0027] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model. The directional terms such as front / back, up / down, etc., used therein are only used to indicate relative positional relationships and do not constitute an improper limitation of this utility model. In the drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of the milling cutter described in an embodiment of the present utility model;

[0029] Figure 2 for Figure 1 A partial disassembly diagram of the part shown in section A;

[0030] Figure 3 This is a schematic diagram of the structure of the type A component described in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the B-type component described in an embodiment of the present invention;

[0032] Figure 5 for Figure 4 An exploded view of the type B component shown;

[0033] Figure 6 This is a schematic diagram of the overall structure of the cutting tool assembly described in an embodiment of the present utility model;

[0034] Figure 7 This is a schematic diagram of the overall structure of the tool assembly with multiple milling cutters described in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram showing the disassembly structure of the tool holder, flat key, and positioning sleeve described in an embodiment of this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Tool holder; 10. Keyway; 11. Positioning hole;

[0038] 2. Flat key; 3. Positioning sleeve; 30. Locking hole; 31. Locking screw;

[0039] 4. Cutter head; 4a. Fixed cutter head; 4b. Movable cutter head; 40. Mounting hole; 400. Keyway; 41. Tool mounting slot; 410. Mounting base surface; 411. First lower guide tooth groove; 412. First adjustment slot; 413. Screw hole; 414. Limiting hole; 42. Radial adjusting screw; 43. Limiting screw;

[0040] 5. Blade assembly; 5a. Type A assembly; 5b. Type B assembly;

[0041] 50. Tool holder; 500. First upper guide tooth groove; 501. First adjusting boss; 502. First adjusting thread; 503. Second lower guide tooth groove; 504. Second adjusting groove; 505. Through hole; 51. Axial adjusting screw; 510. Snap ring; 52. Slider; 520. Second upper guide tooth groove; 521. Second adjusting boss; 522. Second adjusting thread; 523. Blade fixing groove; 53. Blade; 530. End cutting edge; 531. Side cutting edge; 54. Fixing screw; 55. Pressure block; 56. Fastening screw. Detailed Implementation

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0043] In the description of this utility model, it should be stated that if terms such as "upper," "lower," "left," "right," "front," "back," "inner," and "outer" appear, they 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 do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances. The limiting terms such as "first," "second," "A," "B," "C," and "D" appearing in the description of this utility model are merely for distinguishing similar features in different locations, attributions, or uses, in order to avoid ambiguity and confusion, and should not be construed as indicating or implying relative importance.

[0045] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] Example 1

[0047] This embodiment relates to a milling cutter that can increase the applicability of the tool in radial machining dimensions; an exemplary structure is as follows: Figure 1 , Figure 2 and Figure 3 As shown.

[0048] Overall, the milling cutter includes a cutter head 4 and a plurality of insert assemblies 5 spaced apart circumferentially on the cutter head 4. Each insert assembly 5 includes a tool holder and inserts 53 mounted on the tool holder, and the tool holder is adjustable in position radially on the cutter head 4. One end of each insert 53, away from the axis of the cutter head 4, has an end cutting edge 530. The end cutting edge 530 protrudes beyond the cutter head 4 radially; adjusting the position of the tool holder changes the distance the end cutting edge 530 protrudes beyond the cutter head 4.

[0049] It should be noted that, based on the above-mentioned overall design concept, the technical solution of this utility model can adopt a variety of different specific implementation structures, forms, or configuration sequences. For example, the above-mentioned tool holder can be a single structure or a split structure. Its position adjustment on the tool disc 4 can be achieved by selectively fastening it with multiple fastening holes, or by pressing it against the tool disc 4. The specific arrangement sequence and assembly method of the blade 53, tool holder, and tool disc 4 can also be flexibly adjusted. For parts required for the implementation of the overall solution but not covered in the above-mentioned overall setup, reasonable and flexible designs can be made by referring to mature setup methods in the field and the actual situation during implementation. The specific implementation scheme described below in this embodiment is only one of the many solutions that can be formed by the above-mentioned combinations and variations. In actual implementation, those skilled in the art can make flexible adjustments and improvements based on the actual situation. Obviously, the various solutions that can be formed by the above-mentioned combinations and variations, as well as the specific implementation scheme of this embodiment, are all within the protection scope of this utility model.

[0050] Specifically, such as Figure 2 and combined Figure 4 , Figure 5 As shown, the edge of the cutter head 4 is provided with a tool mounting groove 41, and one side wall of the tool mounting groove 41 is set as a mounting base 410 for assembling the tool holder. Furthermore, this mounting base 410 is located on the axial section of the cutter head 4, and the tool holder is adjustablely mounted on this mounting base 410. By providing a tool mounting groove 41 at the edge of the cutter head 4, and using the side wall and bottom wall of the tool mounting groove 41 as a mounting base, the tool holder is assembled on the cutter head 4, thus providing good accommodating space and installation conditions for the tool holder and its cutting inserts 53. Using one side wall of the tool mounting groove 41 as the mounting base 410, the tool holder is assembled onto this mounting base 410. When adjusting the position of the tool holder, it can be moved horizontally on the mounting base 410. This provides a reliable reference surface for adjusting the tool holder and facilitates fixing the tool holder to the mounting base 410 by screwing, pressing, or other methods.

[0051] Based on the above configuration, the mounting base 410 of this embodiment is provided with a first adjustment groove 412, and a rotatable radial adjustment screw 42 is provided in the first adjustment groove 412. Simultaneously, a first adjustment thread 502 is provided at the bottom of the tool holder. The radial adjustment screw 42 is screwed into the first adjustment thread 502. As the radial adjustment screw 42 rotates, the tool holder can move radially along the tool disc 4 on the mounting base 410. Considering the screwing requirement between the first adjustment thread 502 and the radial adjustment screw 42, a raised first adjustment boss 501 can be provided at the bottom of the tool holder, and the first adjustment thread 502 can be disposed on the first adjustment boss 501 to facilitate screwing into the radial adjustment screw 42 located in the first adjustment groove 412. By opening a first adjustment groove 412 on the mounting base 410 and setting a radial adjustment screw 42 in the first adjustment groove 412, the position of the tool holder can be adjusted by turning the radial adjustment screw 42 using a screwdriver, Allen wrench or other tools through thread transmission. It has good operation convenience and structural reliability, and the processing structure is simple and the manufacturing cost is low.

[0052] In addition, as Figure 2 , Figure 3 As shown, a first lower guide tooth groove 411 is provided on the mounting base 410, arranged radially along the cutter head 4. Simultaneously, a first upper guide tooth groove 500, matching the first lower guide tooth groove 411, is provided at the bottom of the tool holder. When the tool holder is pressed against the mounting base 410, the first lower guide tooth groove 411 and the first upper guide tooth groove 500 mesh together, restricting the axial movement of the tool holder in the cutter head 4. By providing guide tooth grooves between the mounting base 410 and the bottom of the tool holder, not only is the axial movement of the tool holder restricted, but also a good guiding effect is provided for adjusting the radial position of the tool holder in the cutter head 4.

[0053] In a specific implementation, a hole arranged radially along the cutter head 4 can be opened at the bottom of the first adjusting groove 412. The end of the radial adjusting screw 42 is inserted into this hole. At the same time, a limiting hole 414 is opened axially on the cutter head 4, so that the limiting hole 414 connects to the aforementioned hole and is arranged in a crisscross pattern. Furthermore, an annular groove is provided at the end of the radial adjusting screw 42, and a limiting screw 43 is screwed into the limiting hole 414. The end of the limiting screw 43 is partially located in the groove at the end of the radial adjusting screw 42. This prevents the radial adjusting screw 42 from coming out of the hole in the first adjusting groove 412 and allows the radial adjusting screw 42 to rotate freely within the first adjusting groove 412.

[0054] As mentioned above, the tool holder can adopt a unique or split structure. In this embodiment, the tool holder is a split structure; it includes a tool holder 50 and a slider 52 disposed on the tool holder 50, with the blade 53 fixedly mounted on the slider 52; of course, the aforementioned first upper guide tooth groove 500, first adjusting boss 501, and first adjusting thread 502 are disposed at the bottom of the tool holder 50, so that the tool holder 50 is adjustable in the radial direction on the cutter head 4. Based on the above configuration, the slider 52 is adjustable in the axial direction on the tool holder 50; moreover, one side of the blade 53 is provided with a side cutting edge 531, which protrudes beyond the end face of one end of the cutter head 4 in the axial direction of the cutter head 4. By adjusting the position of the slider 52 on the tool holder 50, the distance by which the side cutting edge 531 protrudes beyond the end face of the cutter head 4 can be changed.

[0055] As can be seen from the above, the tool holder is designed as two parts: the tool holder 50 and the slider 52. By setting the slider 52 to be adjustable on the tool holder 50, the position of the slider 52 on the tool holder 50 can be easily changed by adjusting the position of the slider 52 on the tool holder 50 in the axial direction of the tool head 4. In this way, the milling position of the side cutting edge 531 of the tool 53 can be changed, thereby meeting the requirements of different milling positions and milling widths.

[0056] Regarding the adjustment structure of the slider 52 on the tool holder 50, there are of course many different structural schemes to choose from. In this embodiment, such as... Figure 5 As shown, the tool holder 50 is provided with a second adjusting groove 504, and a rotatable axial adjusting screw 51 is provided in the second adjusting groove 504. A second adjusting thread 522 is provided at the bottom of the slider 52. The axial adjusting screw 51 is screwed to the second adjusting thread 522. As the axial adjusting screw 51 rotates, the slider 52 can move along the axial direction of the tool disc 4 on the tool holder 50.

[0057] Similar to the method of adjusting the position of the tool holder 50 on the mounting base 410, a second adjustment groove 504 is provided on the top of the tool holder 50, and a rotatable axial adjustment screw 51 is provided in the second adjustment groove 504, which can also achieve the purpose of convenient operation to adjust the axial position of the slider 52.

[0058] In terms of specific design, a through hole 505 can be machined at the bottom of the second adjusting groove 504. The end of the axial adjusting screw 51 is passed through the through hole 505, and the axial adjusting screw 51 is secured within the through hole 505 by a retaining spring 510 that is locked at the end of the axial adjusting screw 51, preventing the axial adjusting screw 51 from disengaging from the second adjusting groove 504. A hexagonal socket can be provided at the other end of the axial adjusting screw 51 relative to the end where the retaining spring 510 is locked, for rotational operation. Alternatively, a guide structure between the mounting base 410 and the tool holder 50 can be used, with a second lower guide tooth groove 503 at the top of the tool holder 50 and a second upper guide tooth groove 520 at the bottom of the slider 52. Both the second lower guide tooth groove 503 and the second upper guide tooth groove 520 are arranged along the axial direction of the cutter head 4, thus guiding the adjustment of the slider 52's position and restricting the slider 52 from moving freely in the radial direction of the cutter head 4. Similar to the arrangement of the first adjusting thread 502, in order to facilitate the screwing of the second adjusting thread 522 and the axial adjusting screw 51, a raised second adjusting boss 521 can be provided at the bottom of the slider 52, and the second adjusting thread 522 can be set on the second adjusting boss 521 so as to be screwed with the axial adjusting screw 51 located in the second adjusting groove 504.

[0059] While achieving the movement adjustment of the tool holder 50 on the mounting base 410 and the movement adjustment of the slider 52 on the tool holder 50, the tool holder 50 and the slider 52 should be restricted in the direction perpendicular to the mounting base 410, so that they can only move in a limited position adjustment direction to achieve a fastening effect. In actual operation, a wedge-shaped guide groove structure can be used to guide the tool holder 50 on the tool disc 4 and limit the slider 52 on the tool holder 50 in the height direction. In this embodiment, the following is used: Figure 2 , Figure 4 and Figure 5 As shown, a pressure block 55 is provided in the tool mounting slot 41. The pressure block 55 is used to press the slider 52 onto the tool holder 50 and to press the tool holder onto the mounting base surface 410. By providing the pressure block 55 on the top of the slider 52 and fixing the pressure block 55 to the screw hole 413 at the bottom of the tool mounting slot 41 with fastening screws 56, the slider 52 and the tool holder 50 can only move in a limited position adjustment direction. After tightening the pressure block 55, the pressure block 55 can also press the slider 52 and the tool holder 50 onto the mounting base surface 410 from the top of the entire tool holder.

[0060] In specific configuration, the pressure block 55 can be designed as a trapezoidal wedge structure, cooperating with the wedge-shaped groove space formed between the side wall of the tool mounting groove 41 and the top of the slider 52. During the tightening of the fastening screw 56, the pressure block 55 moves downwards along the depth direction of the tool mounting groove 41. As it moves to the bottom of the tool mounting groove 41, both sides of the pressure block 55 abut against the side wall of the tool mounting groove 41 and the top of the slider 52, respectively, thus clamping the entire tool holder. During the loosening of the fastening screw 56, the pressure block 55 moves upwards, widening the space it occupies, thereby releasing the clamping state on the tool holder and facilitating the position adjustment of the tool holder 50 or the slider 52. This structure has the advantages of easy machining and technical implementation.

[0061] In addition, such as Figure 1 and Figure 2 As shown, the blade 53 is disposed at the corner of the slider 52. A recessed blade fixing groove 523 can be provided at the corner of the slider 52, and the blade 53 is fastened to the blade fixing groove 523 by a fixing screw 54. At the same time, the blade assembly 5 includes type A assembly 5a and type B assembly 5b in which the blade 53 is disposed at different corners; wherein, the blade 53 on type A assembly 5a protrudes beyond the end face of one end of the cutter head 4, and the blade 53 on type B assembly 5b protrudes beyond the end face of the other end of the cutter head 4, and type A assembly 5a and type B assembly 5b are alternately arranged in the circumferential direction of the cutter head 4. By alternately setting two types of blade assemblies 5, type A and type B, on the cutter head 4, the blades 53 on type A assembly 5a and type B assembly 5b cooperate with each other to process grooves of a certain width. Furthermore, by adjusting the distance of the side cutting edges 531 of the blades 53 on type A assembly 5a and type B assembly 5b protruding from the end face of the cutter head 4, the width of the processed groove can be changed, thereby further improving the processing width range of the tool.

[0062] In summary, the milling cutter of this embodiment has inserts 53 mounted on the cutter head 4 via a tool holder. The tool holder is designed to be position-adjustable, allowing adjustment of the tool holder's position radially. This changes the distance the cutting edge 530 of the insert protrudes from the outer circumference of the cutter head 4, thus altering the overall machining diameter of the milling cutter. When performing arc milling, the radial dimension of the machined arc surface can be changed by adjusting the tool holder's position, thereby increasing the tool's applicability in radial machining dimensions.

[0063] Example 2

[0064] This embodiment relates to a tool assembly, including a tool holder 1 and a milling cutter provided in Embodiment 1 disposed on the tool holder 1.

[0065] Of course, a milling cutter can be installed only at the end of the tool holder 1, and the milling operation on the workpiece can be performed by rotating the tool holder 1; such as Figure 6 As shown. It can also be as... Figure 7 and Figure 8 As shown, multiple milling cutters are mounted on the tool holder 1, and at least one milling cutter can be adjusted in position along the axial direction of the tool holder 1. By mounting multiple milling cutters on the tool holder 1, multiple workpieces or milling stations can be machined simultaneously. Furthermore, by setting a milling cutter to be axially adjustable, the distance between the milling cutters can be adjusted to meet the needs of different machining stations, machining widths, and radial dimensions, thus enabling a single tool to machine more dimensions.

[0066] Taking the case where two end mills are mounted on tool holder 1 as an example, such as Figure 7 As shown, the two milling cutters are a fixed cutter head 4a located at the end of the cutter holder 1 and a movable cutter head 4b located in the middle of the cutter holder 1. The fixed cutter head 4a located at the end of the cutter holder 1 can be directly fixed to the cutter holder 1, while the movable cutter head 4b located in the middle of the cutter holder 1 is position-adjustable. Various structural solutions are available for position adjustment. In this embodiment, as shown... Figure 8 and combined Figure 1 As shown, a keyway 10 is provided on the tool holder 1, and a flat key 2 is placed in the keyway 10. Multiple positioning holes 11 are also provided on the circumferential surface of the tool holder 1, evenly spaced along the axial direction of the tool holder 1. Simultaneously, a mounting hole 40 is provided in the center of the movable tool disc 4b, and a mating keyway 400 is provided on the inner wall of the mounting hole 40. When the movable tool disc 4b is fitted onto the tool holder 1, the flat key 2 is simultaneously inserted into the mating keyway 400, preventing the movable tool disc 4b from rotating relative to the tool holder 1; the movable tool disc 4b can move its position axially on the tool holder 1. In this case, a positioning sleeve 3 is simultaneously fitted onto the tool holder 1. The positioning sleeve 3 has a locking hole 30 corresponding to the positioning hole 11, and a locking screw 31 is screwed into the locking hole 30. The end of the locking screw 31 is inserted into one of the positioning holes 11, thus fixing the positioning sleeve 3 onto the tool holder 1. After the movable cutter head 4b is positioned on the tool holder 1, the positioning sleeve 3 slides to abut against the movable cutter head 4b. Then, the locking screw 31 is screwed into the locking hole 30 to fix the position of the positioning sleeve 3, thereby confining the movable cutter head 4b to its current position. Of course, in order to abut and confine the position of the movable cutter head 4b from both sides, two positioning sleeves 3 can be fitted and fixed on the tool holder 1, and the two positioning sleeves 3 can abut and fix the movable cutter head 4b to both sides respectively.

[0067] Based on the above configuration, the tool assembly of this utility model, with the tool holder 1 and the fixed tool disc 4a integrally manufactured, not only ensures the overall machining accuracy of the tool but also effectively reduces vibration during use. It can be used directly without installing the movable tool disc 4b to machine groove features on product parts. The fixed tool disc 4a has evenly distributed blade assemblies 5 mounted on its disc 4, with the blades 53 on adjacent blade assemblies 5 located on the two end faces of the disc 4, staggered at the top and bottom to ensure simultaneous cutting on both the top and bottom surfaces of the disc 4. When the position of the blade 53 needs adjustment, loosening the fastening screw 56 temporarily releases the clamping block 55 from the tool holder. Tightening the axial adjusting screw 51 adjusts the position of the slider 52 on the tool holder 50, thus adjusting the axial position of the blade 53 on the disc 4. Tightening the slider 52 adjusts the position of the tool holder 50 on the mounting base 410, thus adjusting the radial position of the blade 53 on the disc 4. After adjusting the dimensions, tighten the fastening screws 56 so that the pressure block 55 presses the entire tool holder firmly onto the mounting base 410.

[0068] Meanwhile, a movable cutter head 4b is set in the middle of the tool holder 1, which can machine two positions at once. The mating keyway 400 in the mounting hole 40 of the movable cutter head 4b mates with the flat key 2 in the keyway 10 on the tool holder 1, which plays a role in positioning and preventing rotation of the movable cutter head 4b during the cutting process. The positioning holes 11 on the tool holder 1 can be arranged in two symmetrical rows, with the two rows of positioning holes 11 on both sides of the tool holder 1. The positioning holes 11 on both sides are evenly distributed. The positioning holes 11 on both sides can be directly opposite each other, or they can be staggered in the axial direction of the tool holder 1. When staggered, the distance between the positioning holes 11 on one side and the positioning holes 11 on the other side differs by only half a positioning hole 11. This allows the adjustment distance of the movable cutter head 4b to be accurate to the minimum of half a positioning hole 11, which is more precise.

[0069] When adjusting the movable cutter head 4b, loosen the locking screw 31, then move the movable cutter head 4b until the positioning sleeve 3 is in contact with the end face of the movable cutter head 4b, and then tighten the locking screw 31. By adjusting the movable cutter head 4b and the positioning sleeve 3, the position of the movable cutter head 4b can be finely adjusted to precisely achieve the distance required for fixing the cutter head 4a and the movable cutter head 4b.

[0070] In summary, the cutting tool and milling cutter of this utility model, through the ingenious design of the tool holder and the adjustable structure of the movable cutter head 4b on the tool holder 1, can not only adjust the radial and axial machining dimensions of the tool, but also adjust the distance between the two cutter heads 4. It can be used to machine arc surfaces of various sizes and specifications, can change the characteristics of interpolation layered machining grooves on the machine tool, can directly change the width of the machining groove by adjusting the tool, and can simultaneously perform milling operations on multiple machining positions. The versatility and adaptability of the tool are greatly improved, ensuring machining accuracy, reducing the number of tools required, increasing work efficiency, and reducing product processing costs.

[0071] The above description is merely a preferred embodiment of this utility model. Detailed explanations of configurations, examples of specific structural arrangements, and descriptions of assembly and connection methods are provided to ensure sufficient disclosure so that those skilled in the art can better implement this utility model, and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A milling cutter, characterized in that: It includes a cutter head (4) and a plurality of blade assemblies (5) arranged circumferentially on the cutter head (4); The blade assembly (5) includes a blade holder and a blade (53) disposed on the blade holder, and the blade holder is radially disposed on the blade disc (4). The blade (53) has an end cutting edge (530) at one end away from the axis of the cutter head (4). The end cutting edge (530) protrudes beyond the cutter head (4) in the radial direction. Adjusting the position of the tool holder can change the distance at which the end cutting edge (530) protrudes beyond the cutter head (4).

2. The milling cutter according to claim 1, characterized in that: The edge of the cutter head (4) is provided with a cutter mounting groove (41), and the side wall of one side of the cutter mounting groove (41) is set as a mounting base surface (410) for assembling the cutter holder; The mounting base (410) is located on the axial section of the cutter head (4), and the tool holder is adjustablely mounted on the mounting base (410).

3. The milling cutter according to claim 2, characterized in that: The mounting base (410) is provided with a first adjustment groove (412), and the first adjustment groove (412) is provided with a rotatable radial adjustment screw (42), and a first adjustment thread (502) is provided at the bottom of the tool holder; The radial adjusting screw (42) is screwed to the first adjusting thread (502). As the radial adjusting screw (42) rotates, the tool holder can move radially along the tool disc (4) on the mounting base (410).

4. The milling cutter according to claim 3, characterized in that: The mounting base (410) is provided with a first lower guide tooth groove (411) arranged radially along the cutter head (4), and the bottom of the tool holder is provided with a first upper guide tooth groove (500) that matches the first lower guide tooth groove (411). The first lower guide tooth groove (411) and the first upper guide tooth groove (500) mesh with each other, which can restrict the tool holder from moving axially on the tool disc (4).

5. The milling cutter according to any one of claims 2 to 4, characterized in that: The tool holder includes a tool holder (50) and a slider (52) disposed on the tool holder (50), and the blade (53) is fixedly mounted on the slider (52); The tool holder (50) is adjustablely positioned on the tool disc (4) in the radial direction, and the slider (52) is adjustablely positioned on the tool holder (50) in the axial direction. The blade (53) has a side cutting edge (531) on one side. In the axial direction of the cutter disc (4), the side cutting edge (531) extends beyond the end face of one end of the cutter disc (4). By adjusting the position of the slider (52) on the cutter holder (50), the distance by which the side cutting edge (531) extends beyond the end face of the cutter disc (4) can be changed.

6. The milling cutter according to claim 5, characterized in that: The tool holder (50) is provided with a second adjustment groove (504), and the second adjustment groove (504) is provided with a rotatable axial adjustment screw (51), and the bottom of the slider (52) is provided with a second adjustment thread (522). The axial adjusting screw (51) is screwed to the second adjusting thread (522). As the axial adjusting screw (51) rotates, the slider (52) can move on the tool holder (50) along the axial direction of the cutter head (4).

7. The milling cutter according to claim 6, characterized in that: The tool mounting groove (41) is provided with a pressure block (55), which is used to press the slider (52) onto the tool holder (50) and press the tool post onto the mounting base surface (410).

8. The milling cutter according to claim 5, characterized in that: The blade (53) is disposed at the corner of the slider (52), and the blade assembly (5) includes an A-type assembly (5a) and a B-type assembly (5b) in which the blade (53) is disposed at different corners; The blade (53) on the type A component (5a) extends beyond the end face of one end of the cutter head (4), and the blade (53) on the type B component (5b) extends beyond the end face of the other end of the cutter head (4), and the type A component (5a) and the type B component (5b) are alternately arranged in the circumferential direction of the cutter head (4).

9. A cutting tool assembly, characterized in that: It includes a tool holder (1) and a milling cutter according to any one of claims 1 to 8 disposed on the tool holder (1).

10. The cutting tool assembly according to claim 9, characterized in that: The tool holder (1) is provided with a plurality of milling cutters, and at least one of the milling cutters can be adjusted in position along the axial direction of the tool holder (1).

Images