Milling cutter with precisely mounted milling blade

Abstract

The present invention discloses a milling cutter with a precisely mounted milling blade, belonging to the field of machining tools. A milling cutter with a precisely mounted milling blade comprises a cutter head and a cutter bar, wherein the cutter head is divided into an upper cutter head and a lower cutter head; the upper cutter head is provided with a mounting groove for mounting the blade; the lower cutter head is detachably located at the lower end of the upper cutter head; the mounting angle between the cutter head and the lower cutter head is relatively adjustable; a driving member is fixedly mounted on each of the three seats of the mounting groove, and the driving member is made of at least an elastic material so as to have the ability to deform or move toward the blade under external force; when the blade is mounted, the three side surfaces of the blade respectively abut against the surface of the driving member; the deformation or movement of each driving member is independent, so as to adjust the tip of the blade to a preset position; it can realize that each blade can be individually fine-tuned in multiple directions, and at the same time, the base of all blades can be fine-tuned in the same direction, thereby improving the speed and accuracy of pre-adjusting the tool.

Description

Technical Field

[0001] The present invention belongs to the field of machining tools, and more particularly, relates to a milling cutter with a precisely mounted milling blade. Background Art

[0002] Machining tools with removable inserts typically have blades supported by the tool head's three support surfaces, ensuring stability and improving the surface finish and roughness of the machined surface. Before use on a machine tool, these tools are pre-calibrated on a tool presetter (typically a laser presetter). This involves checking the blade's height, outer diameter, and deflection angle to ensure the blade remains within tolerance after installation. This impacts the finished product's machined dimensions and the blade's lifespan.

[0003] Taking a tool set as an example, the closer the radius of the tip of a blade is to the lower limit of the product's machining size range, the longer the service life of the tip. If the tip size is closer to the upper limit of the product's machining size range, the shorter the service life of the tip. Therefore, the higher the installation accuracy of each blade, the longer the machining life of the tool completed by this installation. In addition, the more consistent the installation of all blades on the same tool, the more blades will be cutting simultaneously during each cutting, so the machining life of the tool completed by this installation will be longer.

[0004] The cutter head of a machined tool with a detachable blade is provided with a mounting slot for installing the blade. The size of the mounting slot is generally fixed and cannot be adjusted. It is very unlikely that all the mounting slots on the same tool have exactly the same size, and it is also very unlikely that the outer dimensions of each blade are exactly the same. Combining the two errors, even if blades of the same batch and type are installed on the same tool, there may be a situation where the position of different blades after installation is out of tolerance. Faced with this situation, the workshop debugger will generally place a copper sheet in the mounting slot to fine-tune the installation position of the blade. This adjustment method is suitable for cases where the tool installation outer diameter and height are small. When the tool installation outer diameter and height are large, the blade can only be fine-tuned by grinding the mounting slot of the cutter head. This method can easily damage the tool and the grinding time is very long, so debuggers generally do not use it easily.

[0005] Therefore, the existing machined tools with fixed installation slots cannot guarantee that the installation position of each blade meets the requirements and is consistent each time the tool is installed; therefore, the service life of such tools is also short and cannot reach the ideal lifespan. The main reason is that it is too difficult to fine-tune the blade after installation. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a milling cutter with precisely installed milling blades, which can enable each blade to be fine-tuned in multiple directions individually, and at the same time can achieve base fine-tuning of all blades in the same direction, thereby improving the speed and accuracy of pre-adjusting the tool.

[0007] The present invention discloses a milling cutter with a precisely mounted milling blade, comprising a cutter head and a cutter bar, wherein the cutter head is divided into an upper cutter head and a lower cutter head; the upper cutter head is provided with a mounting groove for mounting the cutter blade; the lower cutter head is detachably located at the lower end of the upper cutter head; and the mounting angle between the cutter head and the lower cutter head is relatively adjustable.

[0008] A driving member is fixedly mounted on each of the three bases of the mounting groove. The driving member is made of at least an elastic material and has the ability to deform or move toward the blade under external force. When the blade is installed, the three side surfaces of the blade respectively abut against the surface of the driving member.

[0009] Each drive member deforms or moves independently to adjust the tip of the blade to a predetermined position.

[0010] As a further improvement of the present invention, a closed hydraulic pipeline is provided in the cutter head, the hydraulic pipeline is filled with fluid, and the hydraulic pipeline is divided into a monotonic pipeline and an adjusting pipeline; the monotonic pipeline is provided in the upper cutter head and is connected to the mounting groove; the adjusting pipeline is provided in the lower cutter head, and the monotonic pipeline and the adjusting pipeline can be selectively connected by changing the mounting angle of the upper cutter head and the lower cutter head;

[0011] A driving screw is provided in the hydraulic pipeline at the end of the pipeline near the outer side of the cutter head. The driving screw maintains a dynamic seal with the inner wall of the pipeline and has the ability to move along the axial direction of the pipeline to drive the fluid to move.

[0012] The driving member is an expansion wall, which is connected to the hydraulic pipeline and closes the opening of the hydraulic pipeline; the expansion wall is made of at least elastic material to have the ability to expand toward the blade side driven by the fluid, so that the blade installation angle changes.

[0013] As a further improvement of the present invention, each mounting groove corresponds to a monotonic pipeline; the monotonic pipeline has at least three openings; a drive screw is provided at the opening of the monotonic pipeline away from the mounting groove, and the drive screw maintains a dynamic seal with the inner wall of the pipeline at this location; the opening of the monotonic pipeline close to the mounting groove is closed by the expansion wall; the opening of the monotonic pipeline close to the lower cutter head is connected to the adjustment pipeline or is closed by the upper end face of the lower cutter head;

[0014] The adjusting pipeline has at least two openings; the opening of the adjusting pipeline close to the upper cutter head is connected to the monotonic pipeline or is closed by the lower end surface of the upper cutter head; a driving screw is provided at the opening of the adjusting pipeline away from the upper cutter head, and the driving screw maintains a dynamic seal with the inner wall of the pipeline at this location;

[0015] A connecting groove is provided on the upper end surface of the lower cutter head so as to connect a plurality of monotonic pipelines in series when the monotonic pipeline is connected with the regulating pipeline.

[0016] As a further improvement of the present invention, the connecting groove is a wavy annular groove; the waves of the connecting groove are uniform; the opening of the monotonic pipeline close to the lower cutter head is located at the diameter position where the crest of the connecting groove is located, so that when the upper cutter head and the lower cutter head are rotated to the diameter position where the opening of the monotonic pipeline close to the lower cutter head is located at the trough of the connecting groove, the monotonic pipeline is disconnected from the adjusting pipeline.

[0017] As a further improvement of the present invention, the monotonic pipeline is divided into X monotonic tube, Y monotonic tube, and Z monotonic tube; the X monotonic tube, Y monotonic tube, and Z monotonic tube respectively correspond to the three wall surfaces connecting the mounting groove and the blade; the openings of the X monotonic tube, Y monotonic tube, and Z monotonic tube close to the lower cutter head are at different distances from the tool axis; the openings of the same type of monotonic tubes close to the lower cutter head are at the same distance from the tool axis; the openings of the three monotonic tubes of the same mounting groove close to the lower cutter head are located in different radial directions; the upper end surface of the lower cutter head has three connecting grooves to correspond to the three types of monotonic tubes.

[0018] As a further improvement of the present invention, after the upper cutter head and the lower cutter head are installed and connected, a dynamic seal is maintained between the lower end outer edge of the upper cutter head and the upper end outer edge of the lower cutter head; a dynamic seal is maintained between the opening of the monotonic pipeline close to the lower cutter head and the upper end surface of the lower cutter head.

[0019] As a further improvement of the present invention, a through countersunk hole for screws is opened in the middle of the upper cutter head; a waist-shaped through hole is opened in the corresponding middle of the lower cutter head to enable relative rotation of the lower cutter head after the cutter head is connected to the cutter rod.

[0020] As a further improvement of the present invention, a deformation groove is opened on the groove wall side of the expansion wall close to the installation groove, and the edge of the expansion wall is sealed and fixedly connected to the groove wall so that the deformation groove and the groove wall enclose a deformation cavity, and the deformation cavity is connected to the monotonic pipeline; the expansion wall is made of elastic material, so that when the internal pressure of the monotonic pipeline increases, the expansion wall is forced to deform toward the blade side to change the position of the support surface of the blade.

[0021] As a further improvement of the present invention, a deformation groove is opened on the groove wall side of the expansion wall close to the installation groove, and the edge of the expansion wall is connected to the groove wall by elastic material and kept sealed, so that the deformation groove and the groove wall enclose a deformation cavity, and the deformation cavity is connected to the monotonic pipeline; the expansion wall is made of rigid material, and when the internal pressure of the monotonic pipeline increases, the elastic material at the edge of the expansion wall stretches to drive the expansion wall to move toward the blade side.

[0022] As a further improvement of the present invention, the lower edge and the upper edge of the expansion wall are connected to the groove wall by elastic material and kept sealed, and the side edge of the expansion wall is connected to the groove wall by flexible material and kept sealed; the elastic modulus of the elastic material of the lower edge is smaller than the elastic modulus of the elastic material of the upper edge.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention arranges the three walls that abut against the blade to be deformable or movable, so that when the dimensions of the blade or the mounting slot are out of tolerance, they can be adjusted. In particular, the tip of each blade can be adjusted to the same diameter relative to the tool axis, thereby improving the precision of tool pre-adjustment.

[0025] The present invention provides a monotonic pipeline and an adjusting pipeline; when the monotonic pipeline and the adjusting pipeline are not connected, the monotonic pipeline can realize the individual adjustment of each blade to improve the adjustment accuracy; when the monotonic pipeline and the adjusting pipeline are connected, the adjusting pipeline can realize the simultaneous adjustment of all blades to improve the adjustment speed;

[0026] The present invention realizes the separation of the connecting groove and the monotonic pipeline by rotating the lower cutter head and the upper cutter head by a certain angle, so that the opening of the monotonic pipeline is located at the trough of the connecting groove, thereby disconnecting the connection between the monotonic pipeline and the adjustment pipeline, and facilitating the fine adjustment of the blade separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the three-dimensional structure of the cutter head portion of the present invention;

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the mounting groove of the present invention;

[0029] Figure 3 It is a schematic planar cross-sectional structural diagram of the upper cutter head and the lower cutter head after being connected according to the present invention;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure of the blade of the present invention;

[0031] Figure 5 It is a partial structural schematic diagram of the hydraulic pipeline of the present invention;

[0032] Figure 6 Schematic diagram of the planar structure of the connecting groove of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the connection between the adjusting pipe and the connecting groove of the present invention;

[0034] Figure 8 A bottom view of the upper cutter head of the present invention;

[0035] Figure 9 This is a schematic structural diagram of the monotonic tube of the present invention when connected to the connecting groove;

[0036] Figure 10 This is a schematic structural diagram of the monotonic tube of the present invention when it is separated from the connecting groove;

[0037] Figure 11 Schematic diagram of the planar structure of the driving screw of the present invention;

[0038] Figure 12 A schematic structural diagram of the expansion wall of the present invention;

[0039] Figure 13 This is another structural schematic diagram of the expansion wall of the present invention.

[0040] Description of the numbers in the figure:

[0041] Upper cutter head 1, X support surface 11, Y support surface 12, Z support surface 13, lower cutter head 2, blade 3, hydraulic pipeline 4, X monotonic tube 411, Y monotonic tube 412, Z monotonic tube 413, X adjusting tube 421, Y adjusting tube 422, Z adjusting tube 423, X connecting groove 431, Y connection 432, Z connecting groove 433, drive screw 5, drive nut 51, drive stud 52, expansion wall 6. DETAILED DESCRIPTION

[0042] Specific embodiment 1: Please refer to Figure 1-12 A milling cutter with a precisely mounted milling blade includes a cutter head and a cutter bar (not shown in the figure), wherein the cutter head is divided into an upper cutter head 1 and a lower cutter head 2.

[0043] The upper cutter head 1 is provided with a mounting groove for installing the blade 3; the blades 3 described in this embodiment are all external blades, that is, the blades 3 are all located on the outside of the upper cutter head 1 and are locked by screws. The three adjacent sides of the blade 3 abut against the upper cutter head 1 for positioning. The installation form of the blade 3 is consistent with the existing cutting tools, so it will not be repeated.

[0044] The lower cutter head 2 is detachably located at the lower end of the upper cutter head 1; the lower cutter head 2 is detachably connected to the lower end face of the upper cutter head 1; the lower end face of the upper cutter head 1 and the upper end face of the lower cutter head 2 are both flat surfaces. After the upper cutter head 1 and the lower cutter head 2 are connected, the lower end face of the upper cutter head 1 and the upper end face of the lower cutter head 2 fit together; the lower cutter head 2 is coaxial with the upper cutter head 1, and a through countersunk hole for screws is provided in the middle of the upper cutter head 1, and a waist-shaped through hole is provided in the middle of the lower cutter head 2. The lower cutter head 2 has the ability to rotate relative to the upper cutter head 1, so that the lower cutter head 2 can rotate a certain angle. When rotating, the upper edge of the lower cutter head 2 and the lower edge of the upper cutter head 1 maintain dynamic sealing; there are many means to maintain dynamic sealing, such as using a fixed sealing ring, which is a conventional means for those skilled in the art and will not be elaborated here.

[0045] Blade 3 as Figure 4 As shown, the upper right and lower left blade tips are for cutting; the mounting slot is as shown in Figure 2 As shown in the figure, the blade 3 is positioned by the X support surface 11, Y support surface 12, and Z support surface 13 shown in bold; since the installation groove is also processed, there must be dimensional deviation, and the dimensional deviation of the blade 3 is relatively larger. The superposition of the two dimensional deviations can easily lead to inconsistent dimensions of the tip of each blade after the blade 3 is installed, that is, the tip size will be as follows Figure 4The offset in the coordinate system shown is that the ideal state is that the tool tip is located at the origin of the coordinate system; if the accuracy of the tool installation is to be improved, blade 3 needs to be adjusted so that the tip position of each blade is as similar as possible. At the same time, this approach will also increase the service life of the tool. Therefore, the cutting amount borne by each blade during each cutting is similar. In addition, as mentioned above, when the two dimensional deviations are superimposed together, the problem of tool tip size exceeding the tolerance may occur. In order to put the tool into production as quickly as possible, without delaying the production rhythm, and ensuring the production progress, it is necessary to adjust the tip size of blade 2 to a qualified state.

[0046] A closed hydraulic pipeline 4 is provided in the cutter head. The hydraulic pipeline 4 is filled with hydraulic oil. The hydraulic pipeline 4 is divided into a monotonic pipeline and an adjusting pipeline. The monotonic pipeline is provided in the upper cutter head 1 and is connected to the mounting groove. The adjusting pipeline is provided in the lower cutter head 2. The monotonic pipeline and the adjusting pipeline can be selectively connected according to the installation angle of the upper cutter head 1 and the lower cutter head 2.

[0047] Each mounting slot corresponds to a monotonic pipeline; the monotonic pipeline includes an X monotonic pipe 411, a Y monotonic pipe 412, and a Z monotonic pipe 413. Figure 5 As shown, the X monotonic tube 411, the Y monotonic tube 412, and the Z monotonic tube 413 correspond to the X support surface 11, the Y support surface 12, and the Z support surface 13, respectively. The opening principles of the X monotonic tube 411, the Y monotonic tube 412, and the Z monotonic tube 413 are the same. The Z monotonic tube 413 is used as an example for explanation. The Z monotonic tube 413 includes a horizontal tube and a vertical tube. The horizontal tube passes through the seat body of the Z support surface 13 of the mounting groove, wherein the outer opening of the horizontal tube (relatively the opening located on the outside) is located on the outer wall of the seat body. The upper portion is connected to the mounting groove. The inner opening of the horizontal tube (relative to the opening on the inside) is located on the inner wall of the base body and is built with a drive screw 5 to close the inner opening. The vertical tube is opened inside the upper cutter head 1 and is connected to the horizontal tube. The opening at the lower end of the vertical tube is the lower opening, which is opened on the lower end surface of the upper cutter head 1. It should be noted that the drive screw 5 includes a drive nut 51 and a drive stud 52, which are similar to the drive screw on the hydraulic tool handle. For those skilled in the art, this is a conventional technology and will not be described in detail. The lower openings of the X monotonic tube, Y monotonic tube, and Z monotonic tube are at different distances from the tool axis. The lower openings of the same type of monotonic tubes are at the same distance from the tool axis. The lower openings of the three monotonic tubes in the same mounting groove are located in different radial directions.

[0048] The upper end surface of the lower cutter head 2 is provided with three circles of connecting grooves, which are X-connecting groove 431, Y-connecting groove 432 and Z-connecting groove 433 from outside to inside; the X-connecting groove 431 is used to communicate with the X-monotonous tube 411; the Y-connecting groove 432 is used to communicate with the Y-monotonous tube 412; the Z-connecting groove 433 is used to communicate with the Z-monotonous tube 413; the connecting grooves are all wavy annular grooves; the waves of the connecting grooves are uniform; the lower openings of the monotonic pipelines are all located at the diameter position where the corresponding connecting groove crests are located, so that when the upper cutter head 1 and the lower cutter head 2 are rotated to the diameter position where the lower openings of the monotonic pipelines are located at the trough of the connecting grooves, the monotonic pipeline is disconnected from the adjusting pipeline; it should be noted that a dynamic seal is maintained between the lower opening of the monotonic pipeline and the upper end surface of the lower cutter head 2. The commonly used means for dynamic sealing is a fixed sealing ring, which is a conventional means for those skilled in the art and will not be described here. When the lower opening is located at the position corresponding to the trough, the lower opening is no longer connected to the connecting groove.

[0049] An adjustment pipeline is also provided inside the lower cutter head 2, and the adjustment pipeline is divided into an X adjustment pipe 421, a Y adjustment pipe 422, and a Z adjustment pipe 423; the X adjustment pipe 421, the Y adjustment pipe 422, and the Z adjustment pipe 423 are all vertical pipes that pass through the upper and lower sides of the lower cutter head 2, among which the X adjustment pipe 421 is connected to the X connecting groove 431, the Y adjustment pipe 422 is connected to the Y connecting groove 432, and the Z adjustment pipe 423 is connected to the Z connecting groove 433; the opening of the adjustment pipe provided on the upper end surface of the lower cutter head 2 is the upper opening, which is connected to the corresponding connecting groove, and the opening of the adjustment pipe provided on the lower end surface of the lower cutter head 2 is the bottom opening, and a driving screw 5 is provided in the bottom opening to close it.

[0050] When the upper cutter head 1 and the lower cutter head 2 rotate to the point where the lower end of the monotonic tube and the upper end of the adjusting tube correspond to each other, the connecting groove connects all monotonic tubes of the same type together, and the adjusting tube and the monotonic tube form a set of connected pipeline systems. At this time, when the driving screw 5 of the adjusting tube is rotated and moved inward by external force, the hydraulic oil in the monotonic tube will move toward the outer end.

[0051] When the upper cutter head 1 and the lower cutter head 2 rotate to separate the lower end of the monotonic tube and the upper end of the adjusting tube, each monotonic tube is an independent system. When the driving screw 5 of the monotonic tube rotates inward under external force, the hydraulic oil in the monotonic tube will move to the outer end.

[0052] An expansion wall 6 is fixedly installed on the three bases of the mounting groove; a deformation groove is opened on the groove wall side of the expansion wall 6 close to the mounting groove, and the edge of the expansion wall 6 is sealed and fixedly connected to the groove wall (including welding, etc.) so that the deformation groove and the groove wall enclose a deformation cavity, and the deformation cavity is connected to the monotonic pipeline; the expansion wall 6 is made of elastic material, so that when the internal pressure of the monotonic pipeline increases, the expansion wall 6 is forced to deform toward the blade 3 side to change the position of the support surface of the blade 3, and the degree of change is linearly proportional to the depth of movement of the drive screw 5.

[0053] In the monotonic mode, the debugger can adjust the position of each blade individually to improve the accuracy of the blade position, and the three supporting surfaces of each blade can be adjusted, so that the blade can be adjusted at will in the three-dimensional coordinate system, improving the accuracy of the adjustment and achieving an adjustment level that cannot be achieved by the existing copper padding method. It also avoids the problem of the blade being crushed by padding copper on only one side, so that the life and quality of blade 3 are guaranteed.

[0054] In the adjustment mode, the operator can adjust all the blades in the same direction at the same time to adjust the installation position, saving the time of pre-adjusting the tools.

[0055] Specific embodiment 2: The difference from specific embodiment 1 is that Figure 13 As shown, a deformation groove is opened on the groove wall side of the expansion wall 6 close to the installation groove, and the edge of the expansion wall 6 is connected to the groove wall by an elastic material (such as elastic rubber, etc.) and kept sealed, so that the deformation groove and the groove wall enclose a deformation cavity, and the deformation cavity is connected to the monotonic pipeline; the expansion wall 5 is made of rigid material, and when the internal pressure of the monotonic pipeline increases, the elastic material at the edge of the expansion wall 6 stretches to drive the expansion wall 5 to move toward the blade 3 side.

[0056] The lower and upper edges of the expansion wall 6 are connected to the groove wall by elastic materials and kept sealed, and the side edges of the expansion wall 6 are connected to the groove wall by flexible materials and kept sealed; the elastic modulus of the elastic material of the lower edge is smaller than the elastic modulus of the elastic material of the upper edge, so that the expansion wall moves in a rotational form.

[0057] Compared with adjusting the support surface by translation, the rotational form will make the support surface and the side surface of the blade 3 into line contact. However, in reality, it is impossible for the side surface of the blade 3 to fit completely with the support surface, and it is also in line contact from the perspective of onlookers. Therefore, this approach can adjust the blade to the desired position more quickly while ensuring the support foundation, because the support surface can move outward faster than movement; at the same time, when there is a problem of deviation in the manufacturing angle of the side surface of the blade 3 and / or the seat surface of the mounting groove, the rotation of the support surface allows the side surface of the blade 3 to fit more closely with the support surface.

Claims

1. A milling cutter with a precisely mounted milling blade, comprising a cutter head and a cutter bar, characterized in that: The cutter head is divided into an upper cutter head (1) and a lower cutter head (2); the upper cutter head (1) is provided with a mounting groove for mounting a blade (3); the lower cutter head (2) is detachably located at the lower end of the upper cutter head (1); the mounting angle between the cutter head (1) and the lower cutter head (2) is relatively adjustable; A driving member is fixedly mounted on each of the three base bodies of the mounting groove, and the driving member is made of at least an elastic material so as to have the ability to deform or move in the direction of the blade (3) under external force; when the blade (3) is mounted, the three side surfaces of the blade (3) respectively abut against the surface of the driving member; The deformation or movement of each driving member is independent to adjust the tip of the blade (3) to a preset position; A closed hydraulic pipeline (4) is provided in the cutter head. The hydraulic pipeline (4) is filled with fluid. The hydraulic pipeline (4) is divided into a monotonic pipeline and an adjusting pipeline. The monotonic pipeline is provided in the upper cutter head (1) and is connected to the mounting groove. The adjusting pipeline is provided in the lower cutter head (2). The monotonic pipeline and the adjusting pipeline can be selectively connected by the change of the mounting angle of the upper cutter head (1) and the lower cutter head (2). A driving screw (5) is provided in the hydraulic pipeline (4) at the end of the pipeline near the outer side of the cutter head. The driving screw (5) maintains a dynamic seal with the inner wall of the pipeline. The driving screw (5) has the ability to move along the axial direction of the pipeline to drive the fluid to move. The driving member is an expansion wall (6), which is in communication with the hydraulic pipeline (4) and closes the opening of the hydraulic pipeline (4); the expansion wall (6) is made of at least an elastic material so as to have the ability to expand toward the blade (3) side when driven by the fluid, so that the installation angle of the blade (3) changes; Each installation slot corresponds to a monotonic pipeline; the monotonic pipeline has at least three openings; a driving screw (5) is provided at the opening of the monotonic pipeline away from the installation slot, and the driving screw (5) maintains a dynamic seal with the inner wall of the pipeline at this location; the opening of the monotonic pipeline close to the installation slot is closed by the expansion wall (6); the opening of the monotonic pipeline close to the lower cutter head (2) is connected to the adjustment pipeline or is closed by the upper end face of the lower cutter head (2); The adjusting pipeline has at least two openings; the opening of the adjusting pipeline close to the upper cutter head (1) is connected to the monotonic pipeline or is closed by the lower end face of the upper cutter head (1); a driving screw (5) is provided at the opening of the adjusting pipeline away from the upper cutter head (1), and the driving screw (5) maintains a dynamic seal with the inner wall of the pipeline at this location; The upper end surface of the lower cutter head (2) is provided with a connecting groove so as to connect a plurality of monotonic pipelines in series when the monotonic pipeline is connected to the regulating pipeline; The connecting groove is a wavy annular groove; the wavy undulations of the connecting groove are uniform; the opening of the monotonic pipeline close to the lower cutter head (2) is located at the diameter position where the crest of the connecting groove is located, so that when the upper cutter head (1) and the lower cutter head (2) are rotated to the diameter position where the opening of the monotonic pipeline close to the lower cutter head (2) is located at the trough of the connecting groove, the monotonic pipeline is disconnected from the regulating pipeline; After the upper cutter head (1) and the lower cutter head (2) are installed and connected, a dynamic seal is maintained between the outer edge of the lower end of the upper cutter head (1) and the outer edge of the upper end of the lower cutter head (2); and a dynamic seal is maintained between the opening of the monotonic pipeline close to the lower cutter head (2) and the upper end surface of the lower cutter head (2).

2. A milling cutter with a precisely mounted milling insert according to claim 1, characterized in that: The monotonic pipeline is divided into an X monotonic pipe, a Y monotonic pipe, and a Z monotonic pipe; the X monotonic pipe, the Y monotonic pipe, and the Z monotonic pipe respectively correspond to the three wall surfaces that connect the mounting groove and the blade (3); the openings of the X monotonic pipe, the Y monotonic pipe, and the Z monotonic pipe close to the lower cutter head (2) are at different distances from the tool axis; the openings of the same type of monotonic pipes close to the lower cutter head (2) are at the same distance from the tool axis; the openings of the three monotonic pipes in the same mounting groove close to the lower cutter head (2) are located in different radial directions; the upper end surface of the lower cutter head (2) has three connecting grooves to correspond to the three types of monotonic pipes.

3. The milling cutter with a precisely mounted milling insert according to claim 1, characterized in that: A through countersunk hole for a screw is provided in the middle of the upper cutter head (1); and a waist-shaped through hole is provided in the corresponding middle of the lower cutter head (2) to facilitate relative rotation of the lower cutter head (2) after the cutter head and the cutter rod are connected.

4. The milling cutter with a precisely mounted milling insert according to claim 1, characterized in that: A deformation groove is provided on the groove wall side of the expansion wall (6) close to the installation groove, and the edge of the expansion wall (6) is fixedly connected to the groove wall in a sealed manner, so that the deformation groove and the groove wall enclose a deformation cavity, and the deformation cavity is connected to the monotonic pipeline; the expansion wall (6) is made of elastic material, so that when the internal pressure of the monotonic pipeline increases, the expansion wall (6) is forced to deform toward the blade (3) side, so as to change the position of the support surface of the blade (3).

5. The milling cutter with a precisely mounted milling insert according to claim 1, characterized in that: A deformation groove is provided on the groove wall side of the expansion wall (6) close to the installation groove, and the edge of the expansion wall (6) is connected to the groove wall by an elastic material and kept sealed, so that the deformation groove and the groove wall enclose a deformation cavity, and the deformation cavity is connected to the monotonic pipeline; the expansion wall (6) is made of a rigid material, and when the internal pressure of the monotonic pipeline increases, the elastic material at the edge of the expansion wall (6) stretches to drive the expansion wall (6) to move toward the blade (3) side.

6. The milling cutter with a precisely mounted milling insert according to claim 5, characterized in that: The lower edge and the upper edge of the expansion wall (6) are connected to the groove wall through elastic material and maintain a seal, and the side edge of the expansion wall (6) is connected to the groove wall through flexible material and maintains a seal; the elastic modulus of the elastic material of the lower edge is smaller than the elastic modulus of the elastic material of the upper edge.

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