A milling cutter insert and a cutter fixing self-adaptive adjustment milling cutter head

Abstract

The utility model relates to the technical field of milling cutter, concretely to a milling cutter blade and cutter fixed self -adaptation adjustment's milling cutter cutter head, the blade is parallelogram, and the acute angle part of blade constitutes the cutter tip, and the short side of parallelogram at acute angle is the rake face, the utility model discloses the structure of milling cutter blade is designed, and the corresponding milling cutter cutter head is designed, specifically through the multiple installation slots of milling cutter disc distribution, and the contact surface design of installation slot and blade is parallelogram structure, promotes the clamping stability, and simultaneously to blade limiting, always keeps the position of blade head end extension uniform, through the adjustment of threaded bolt, expansion block, pressure block, can accurate positioning to the milling cutter of different length, ensures the cutter head of multiple milling cutter to be flush, avoids the suspension or overstretch, and simultaneously to the regrinding blade and new blade, can use simultaneously, also can guarantee blade bounce, reduces the management cost and the occurrence of use error, promotes the continuity and economy of processing.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, specifically to a milling cutter insert and a milling cutter head with adaptive tool fixing. Background Technology

[0002] In the field of machining, end mills are key tools for achieving efficient cutting, and their reliable clamping and fixation directly affect machining quality and production efficiency. Traditional end mill discs use the lower edge and trailing edge or the rake face of the insert for insert positioning. To improve machining efficiency, multiple end mills are often mounted on the end mill disc to work together.

[0003] However, with prolonged use, end mills experience varying degrees of wear on their cutting edges due to friction and high temperatures during the cutting process. To extend their lifespan, the industry commonly re-grinds the inserts to remove the worn parts. However, this repair operation can cause changes in the length of the end mills, especially after multiple repairs, where the length differences become more significant. Because traditional end mill holders have a fixed clamping structure, when repaired end mills of varying lengths are reinstalled, excessive runout occurs during milling. This not only reduces the smoothness and precision of the machined surface but may also lead to safety hazards such as insert chipping and abnormal spindle vibration. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a milling cutter insert, wherein the insert is a parallelogram, the acute angle of the insert forms the cutting tip, the short side of the parallelogram containing the acute angle is the rake face, and the long side of the parallelogram is the flank face, the flank face is divided into a first flank face and a second flank face, and the rake face and the first flank face are used for grinding the rake face and the first flank face during insert repair.

[0005] Furthermore, the angle between the first flank face and the rake face is less than 90°.

[0006] A milling cutter head with adaptive tool fixing includes a milling cutter head, each milling cutter head having multiple mounting slots. The mounting slots are in which inserts as described above are installed. The milling cutter head is also provided with a positioning and locking mechanism for positioning and fixing the inserts. After the inserts are locked, at least the rake face and the second flank face of the inserts are in close contact with the wall of the mounting slots, and the tip of the inserts extends out of the mounting slots.

[0007] Furthermore, the mounting groove is a parallelogram, having an upper groove wall, a lower groove wall, a front groove wall, and a rear groove wall. After the blade is locked, the front cutting face of the blade closely abuts against the front groove wall, and the second rear cutting face of the blade closely abuts against the upper groove wall.

[0008] Furthermore, the positioning and locking mechanism includes a pressure block and a threaded bolt mounted on the milling cutter disc by screws, wherein the pressure block presses against and fixes the blade surface, and the threaded bolt protrudes from the rear groove wall of the mounting groove and abuts tightly against the rear edge of the blade.

[0009] Furthermore, the milling cutter disc has a locking groove located on the rear side of each mounting slot, and the threaded bolt is screwed into and out from the locking groove until it tightly abuts against the rear edge of the cutting tool on the rear wall of the mounting slot.

[0010] Furthermore, the milling cutter disc has a through hole that communicates with the mounting groove, and an expansion block is provided in the through hole. One side of the expansion block is in close contact with the lower edge of the cutting blade.

[0011] Furthermore, the through hole is secured by a screw inserted into the expansion block and locked into the through hole, so that one side of the expansion block is in close contact with the lower edge of the blade.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] This invention designs the structure of the milling cutter insert and a corresponding milling cutter disc. Specifically, the milling cutter disc has multiple mounting slots, and the contact surface between the mounting slots and the insert is designed as a parallelogram structure, which improves clamping stability and limits the position of the insert, ensuring that the position of the insert tip is always uniform. By adjusting the threaded bolt, expansion block, and pressure block, milling cutters of different lengths can be precisely positioned, ensuring that multiple milling cutter tips are flush and avoiding suspension or overextension. At the same time, refritched inserts and new inserts can be used simultaneously, and insert runout can be prevented, reducing management costs and the occurrence of usage errors, and improving machining continuity and economy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external milling structure of the milling cutter head in this utility model;

[0015] Figure 2 This is a schematic diagram of the internal milling structure of the milling cutter head in this utility model;

[0016] Figure 3 This utility model Figure 1 Schematic diagram of the structure of the middle milling cutter head;

[0017] Figure 4 This utility model Figure 2 A schematic diagram of the structure of the middle milling cutter head.

[0018] In the diagram: 1. Milling cutter head; 2. Mounting slot; 21. Lower slot wall; 22. Upper slot wall; 23. Front slot wall; 24. Rear slot wall; 3. Insert; 31. Front face; 32. Back face; 321. First back face; 322. Second back face; 33. Back edge; 34. Lower edge; 4. Pressure block; 6. Through hole; 7. Expansion block; 8. Threaded bolt. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 , 3 The external milling cutter head shown, or Figure 2 , 4 The internal milling cutter disc shown in this embodiment has a parallelogram-shaped insert. The acute angle of the insert 3 forms the cutting tip. The short side of the parallelogram containing the acute angle is the rake face 31, and the long side is the flank face 32. The flank face 32 is divided into a first flank face 321 and a second flank face 322. The rake face 31 and the first flank face 321 are used for grinding during insert 3 repair. The angle between the first flank face and the rake face 31 is less than 90°. The difference between this milling cutter insert and a conventional parallelogram insert is that in this embodiment, the long side of the parallelogram is the flank face, and the short side is the rake face, while in conventional inserts it is the opposite. Because this insert can grind and repair the flank face, the angle of the acute angle remains unchanged after grinding, ensuring that the protruding position of the cutting tip remains unchanged after repair. Existing parallelogram-shaped blades can only be ground at the tip. The center of the blade has a mounting hole, and the mounting position remains unchanged. Grinding this will change the position of the blade tip, affecting the accuracy of the blade.

[0021] On the other hand, this embodiment also provides a milling cutter head with adaptive tool fixing, including a milling cutter head 1. The milling cutter head 1 has multiple parallelogram-shaped mounting grooves 2. The mounting groove 2 has an upper groove wall 22, a lower groove wall 21, a front groove wall 23, and a rear groove wall 24. A parallelogram-shaped cutting tool 3 is installed in the mounting groove 2. A positioning and locking mechanism is provided on the milling cutter head 1 to ensure that after the cutting tool 3 is locked, the front cutting face 31 and the rear cutting face 32 are in close contact with the front groove wall 23 and the upper groove wall 22 of the mounting groove 2, and the cutting tool tip extends out of the mounting groove 2.

[0022] In the above structure, the parallelism of opposite sides of the parallelogram enables the insert 3 to form a stable surface contact positioning in the mounting groove 2, ensuring the consistency of the protrusion position of the cutter head after multiple inserts are installed. This structure unifies the cutter head protrusion reference through geometric limit, so even if the insert length changes after repair, the insert can still be installed and fixed based on the same reference, avoiding machining errors and interruptions caused by length differences, and improving the continuity of milling.

[0023] The positioning and locking mechanism includes a pressure block 4 and a threaded bolt 8. The pressure block 4 is installed on the milling cutter disc 1 by screws, pressing and fixing the surface of the insert 3. The threaded bolt 8 protrudes from the rear groove wall 24 of the mounting groove 2 and abuts tightly against the rear edge of the insert 3. Each mounting groove 2 on the milling cutter disc 1 has a locking groove on its rear side. The threaded bolt 8 is screwed in from the locking groove sideways, pressing against the rear edge 33 of the insert. The pressure block 4 and the threaded bolt 8 form a two-way fixing structure with upward pressure and rearward push. Compared with the traditional single screw fixing method, even if the size of the insert changes after re-grinding, it can still be fixed in the mounting groove with a uniform benchmark by the positioning and locking mechanism, ensuring the consistency of the insert tip position. Specifically, since the screwing depth of the threaded bolt 8 can be precisely adjusted, when the length of the insert 3 is reduced due to repair, the insert is pushed forward by screwing in the threaded bolt to compensate for the length difference, so that inserts with different repair counts can still keep the tip flush. This solves the problem that the traditional structure cannot adapt to changes in insert length, extends the number of insert reuses, and reduces the replacement frequency and cost.

[0024] In addition, the milling cutter disc 1 has a through hole 6 that communicates with the mounting groove 2. A expansion block 7 is installed in the through hole 6. The expansion block 7 is inserted into the through hole 6 and locked in place, so that one side of the expansion block 7 is in close contact with the lower edge 34 of the cutting tool 3. The expansion block 7, in conjunction with the mounting groove, ensures that the cutting tool is in contact with the mounting groove, further improving the stability and service life of the cutting tool clamping.

[0025] In this embodiment, the milling cutter head 1 is divided into an external milling cutter head for external milling and an internal milling cutter head for internal milling. Therefore, as Figure 1 In the middle, the mounting slot 2 on the milling cutter disc 1, with its opening facing outwards, is the outer milling cutter disc, such as... Figure 2 In the design, the mounting slot 2 on the milling cutter head 1 faces inward and is the inner milling cutter head. The inserts on both the outer and inner milling cutter heads are fixed by a positioning and locking mechanism. The adaptability of the positioning and locking mechanism to different milling cutter heads ensures the reusability of the inserts. The repaired inserts can be precisely positioned using the same adjustment method, whether used for outer or inner milling, thus reducing insert waste.

[0026] When the blade is switched to use the other end of the blade tip, the positions of its front face, back face, rear edge, and bottom edge remain unchanged.

[0027] Working principle: Place the cutting tool into the mounting slot, so that the front cutting face makes initial contact with the front slot wall and the rear cutting face makes initial contact with the upper slot wall to form a reference positioning. Tighten the threaded bolt and adjust the front and rear positions of the cutting tool according to the length difference after the cutting tool is repaired, so that the length of the cutting head end protruding meets the processing requirements. By adjusting the screw of the expansion block, push the side of the expansion block to press against the lower edge of the cutting tool. Tighten the screw of the pressure block to fix the upper surface of the cutting tool. At the same time, confirm the locking state of the threaded bolt and the expansion block to complete the overall clamping.

[0028] The entire workflow is now complete, and anything not described in detail in this specification is existing technology known to those skilled in the art.

[0029] It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A milling cutter insert, characterized in that: The blade (3) is a parallelogram. The acute angle of the blade (3) forms the blade tip. The short side of the parallelogram containing the acute angle is the front face (31), and the long side of the parallelogram is the back face (32). The back face (32) is divided into two sections: a first back face (321) and a second back face (322). The front face (31) and the first back face (321) are used to grind the front face (31) and the first back face (321) when the blade (3) is repaired.

2. A milling cutter insert according to claim 1, characterized in that: The angle between the first flank face and the rake face (31) is less than 90°.

3. A milling cutter head with adaptive tool fixing, comprising a milling cutter head (1), characterized in that: The milling cutter disc (1) is provided with multiple mounting slots (2), and the cutting blade (3) as described in claim 1 or 2 is installed in the mounting slot (2). The milling cutter disc (1) is also provided with a positioning and locking mechanism for positioning and fixing the cutting blade (3). After the cutting blade (3) is locked, at least the front cutting face (31) and the second rear cutting face (322) of the cutting blade (3) are in close contact with the groove wall of the mounting slot (2), and the cutting tip of the cutting blade (3) extends out of the mounting slot (2).

4. A milling cutter head with adaptive tool fixing according to claim 3, characterized in that: The mounting groove (2) is a parallelogram and has an upper groove wall (22), a lower groove wall (21), a front groove wall (23) and a rear groove wall (24). After the blade (3) is locked, the front cutting surface (31) of the blade (3) closely abuts against the front groove wall (23), and the second rear cutting surface (322) of the blade (3) closely abuts against the upper groove wall (22).

5. A milling cutter head with adaptive tool fixing according to claim 3, characterized in that: The positioning and locking mechanism includes a pressure block (4) and a threaded bolt (8) mounted on the milling cutter disc (1) by screws, wherein the pressure block (4) presses against and fixes the surface of the blade (3), and the threaded bolt (8) protrudes from the rear groove wall (24) of the mounting groove (2) and abuts against the rear edge (33) of the blade (3).

6. A milling cutter head with adaptive tool fixing according to claim 5, characterized in that: The milling cutter disc (1) has a locking groove on the rear side of each mounting slot (2). The threaded bolt (8) is screwed into the locking groove and screwed out until the rear groove wall of the mounting slot (2) is in close contact with the rear edge (33) of the cutting tool (3).

7. A milling cutter head with adaptive tool fixing according to claim 6, characterized in that: The milling cutter disc (1) has a through hole (6) that communicates with the mounting groove (2). A swelling block (7) is provided in the through hole (6). One side of the swelling block (7) is in close contact with the lower edge (34) of the blade (3).

8. A milling cutter head with adaptive tool fixing according to claim 7, characterized in that: The through hole (6) is screwed into the expansion block (7) and locked into the through hole (6), so that one side of the expansion block (7) is in close contact with the lower edge of the blade (3).

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