Milling cutter with V-shaped wedging surface

Abstract

The utility model relates to the technical field of milling cutters, in particular to a milling cutter with a V-shaped matching surface, which is characterized in that a second cutter mounting surface, a second upper positioning surface, a second left positioning inclined surface and a second right positioning inclined surface of a blade are respectively propped against a first cutter mounting surface, a first upper positioning surface, a first left positioning inclined surface and a first right positioning inclined surface of a cutter mounting groove; the inclined plane extension line of the first left positioning inclined plane and the inclined plane extension line of the first right positioning inclined plane converge to form a V shape, so that the position precision and the stability of blade assembly are improved, and during milling, stress analysis shows that radial shear force borne by the locking bolt can be effectively reduced, so that the locking bolt is not easy to break or loosen, and the service life of the blade is prolonged. The blade can be stably locked, the service life of the blade is prolonged, and the milling quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a milling cutter with a V-shaped fitting surface. Background Art

[0002] Milling cutters are divided into one-piece milling cutters and split milling cutters. The cutter body and teeth of the one-piece milling cutter are of one-piece structure, while the cutter body and blade of the split milling cutter are detachably connected via bolts. A milling cutter is a rotary tool with one or more teeth or blades used for milling. During operation, each tooth or blade cuts off the excess of the workpiece in turn and intermittently. Milling cutters are mainly used for processing planes, steps, grooves, forming surfaces and cutting off workpieces on milling machines. When the existing split milling cutter is milling a workpiece, the force acting on the blade will act on the bolt, causing the bolt to be subjected to a large axial external tension and radial shear force, which makes the bolt easy to loosen or break, posing a safety hazard in milling. In addition, the assembly firmness of the blade is poor, and the quality of the milling product is difficult to guarantee, which can easily shorten the service life of the blade. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a milling cutter with a V-shaped fitting surface.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A milling cutter with a V-shaped fitting surface comprises a cutter body and multiple blades, a plurality of mounting blocks are recessed in an annular array on the circumference of the bottom end of the cutter body, the multiple mounting blocks are respectively arranged in a one-to-one correspondence with the multiple blades, each mounting block is provided with a mounting groove, and each blade is locked in the mounting groove of the mounting block via a locking bolt, the mounting groove consisting of a first mounting surface, a first upper positioning surface, a first left positioning inclined surface and a first right positioning inclined surface, the first upper positioning surface is located on the upper side of the first mounting surface, the first left positioning inclined surface is located on the left side of the first mounting surface, the first right positioning inclined surface is located on the right side of the first mounting surface, and the inclined surface extension line of the first left positioning inclined surface and the inclined surface extension line of the first right positioning inclined surface converge to form a V shape; the blade is provided with a second mounting surface that cooperates with the first mounting surface, a second upper positioning surface that cooperates with the first upper positioning surface, a second left positioning inclined surface that cooperates with the first left positioning inclined surface, and a second right positioning inclined surface that cooperates with the first right positioning inclined surface.

[0006] Furthermore, a countersunk through hole is opened in the middle of the blade, and the countersunk through hole passes through the second cutting surface. A threaded hole is recessed in the middle of the first cutting surface, and the threaded hole is used to connect with the countersunk through hole. The stud of the locking bolt passes through the countersunk through hole and is threadedly connected with the threaded hole. The nut of the locking bolt is accommodated in the countersunk through hole.

[0007] Furthermore, grooves are arranged between the first left positioning inclined surface and the first tool mounting surface, between the first right positioning inclined surface and the first tool mounting surface, and between the first upper positioning surface and the first tool mounting surface, and the corners of the second tool mounting surface are located at the corresponding grooves.

[0008] Furthermore, an avoidance groove is provided at the corner between the first left positioning inclined surface and the first upper positioning surface, and a cutting edge of the blade is accommodated in the avoidance groove.

[0009] Furthermore, the included angle between the first left positioning inclined plane and the first right positioning inclined plane is 90°.

[0010] Furthermore, a quick-installation groove is recessed at the top of the knife body.

[0011] The beneficial effects of the utility model are as follows: in actual application, the second cutting surface, the second upper positioning surface, the second left positioning bevel and the second right positioning bevel of the blade respectively collide with the first cutting surface, the first upper positioning surface, the first left positioning bevel and the first right positioning bevel of the cutting groove, and the bevel extension line of the first left positioning bevel and the bevel extension line of the first right positioning bevel converge to form a V shape to improve the position accuracy and stability of the blade assembly, and during milling, force analysis shows that the radial shear force on the locking bolt can be effectively reduced, so that the locking bolt is not easy to break or loosen, the blade can be firmly locked, the service life of the blade is extended, and the quality of milling is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0013] Figure 2 It is a schematic diagram of the exploded structure of the utility model.

[0014] Figure 3 It is a three-dimensional structural schematic diagram of the blade of the utility model.

[0015] Description of reference numerals:

[0016] 1. Cutter body; 2. Blade; 3. Cutter block; 4. Cutter groove; 5. First Cutter surface; 6. First upper positioning surface; 7. First left positioning bevel; 8. First right positioning bevel; 9. Second Cutter surface; 10. Second upper positioning surface; 11. Second left positioning bevel; 12. Second right positioning bevel; 13. Countersunk through hole; 14. Threaded hole; 15. Groove; 16. Avoidance groove; 17. Quick-release groove; 18. Locking bolt. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0018] like Figures 1 to 3 As shown, the utility model provides a milling cutter with a V-shaped fitting surface, which includes a cutter body 1 and a plurality of blades 2. A plurality of tool mounting blocks 3 are concavely arranged in an annular array around the bottom end of the cutter body 1. The plurality of tool mounting blocks 3 are respectively arranged in a one-to-one correspondence with the plurality of blades 2. Each tool mounting block 3 is provided with a tool mounting groove 4. Each blade 2 is locked in the tool mounting groove 4 of the tool mounting block 3 via a locking bolt 18. The tool mounting groove 4 consists of a first tool mounting surface 5, a first upper positioning surface 6, a first left positioning inclined surface 7 and a first right positioning inclined surface 8. The first upper positioning surface 6 is located on the upper side of the first tool mounting surface 5. On the side, the first left positioning bevel 7 is located on the left side of the first cutting surface 5, and the first right positioning bevel 8 is located on the right side of the first cutting surface 5. The bevel extension line of the first left positioning bevel 7 and the bevel extension line of the first right positioning bevel 8 converge in a V shape to form a V-shaped fitting surface; the blade 2 is provided with a second cutting surface 9 which cooperates with the first cutting surface 5, a second upper positioning surface 10 which cooperates with the first upper positioning surface 6, a second left positioning bevel 11 which cooperates with the first left positioning bevel 7, and a second right positioning bevel 12 which cooperates with the first right positioning bevel 8.

[0019] In actual application, the second mounting surface 9, the second upper positioning surface 10, the second left positioning bevel 11 and the second right positioning bevel 12 of the blade 2 respectively contact the first mounting surface 5, the first upper positioning surface 6, the first left positioning bevel 7 and the first right positioning bevel 8 of the mounting groove 4, and the bevel extension line of the first left positioning bevel 7 and the bevel extension line of the first right positioning bevel 8 converge in a V shape to improve the position accuracy and stability of the assembly of the blade 2. During milling, after force analysis, it can be seen that the radial shear force on the locking bolt 18 can be effectively reduced, so that the locking bolt 18 is not easy to break or loose, and can firmly lock the blade 2, thereby extending the service life of the blade 2 and improving the quality of milling.

[0020] In this embodiment, a countersunk through hole 13 is provided in the middle of the blade 2, and the countersunk through hole 13 passes through the second tool mounting surface 9. A threaded hole 14 is recessed in the middle of the first tool mounting surface 5, and the threaded hole 14 is used to communicate with the countersunk through hole 13. The stud of the locking bolt 18 passes through the countersunk through hole 13 and is threadedly connected with the threaded hole 14, and the nut of the locking bolt 18 is accommodated in the countersunk through hole 13. This structural design is conducive to firmly locking the blade 2 in the tool mounting groove 4.

[0021] In this embodiment, grooves 15 are provided between the first left positioning bevel 7 and the first tool mounting surface 5, between the first right positioning bevel 8 and the first tool mounting surface 5, and between the first upper positioning surface 6 and the first tool mounting surface 5, and the corners of the second tool mounting surface 9 are located at the corresponding grooves 15. The provision of the grooves 15, on the one hand, provides an escape space for the corners of the second tool mounting surface 9 of the blade 2, and on the other hand, allows the coolant to flow in the grooves 15 to cool the blade 2.

[0022] In this embodiment, an escape groove 16 is provided at the corner of the first left positioning inclined surface 7 and the first upper positioning surface 6, and one edge of the blade 2 is accommodated in the escape groove 16. The setting of the escape groove 16, on the one hand, provides an escape space for one edge of the blade 2, and on the other hand, allows coolant to flow in the escape groove 16 to cool the blade 2.

[0023] In this embodiment, the angle between the first left positioning inclined surface 7 and the first right positioning inclined surface 8 is 90°. This structural design further reduces the radial shear force on the locking bolt 18.

[0024] In this embodiment, a quick-installation groove 17 is concavely disposed on the top of the blade body 1. The quick-installation groove 17 is concavely matched with the external structure, so that the utility model can be quickly assembled with the external structure.

[0025] All technical features in this embodiment can be freely combined according to actual needs.

[0026] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A milling cutter having a V-shaped mating surface, characterized in that: The present invention comprises a knife body (1) and a plurality of blades (2). The knife body (1) is provided with a plurality of knife blocks (3) in a circular array on the circumference of the bottom end thereof. The plurality of knife blocks (3) are respectively arranged in a one-to-one correspondence with the plurality of blades (2). Each knife block (3) is provided with a knife groove (4). Each blade (2) is locked in the knife groove (4) of the knife block (3) via a locking bolt (18). The knife groove (4) is composed of a first knife surface (5), a first upper positioning surface (6), a first left positioning inclined surface (7) and a first right positioning inclined surface (8). The first upper positioning surface (6) is located on the upper side of the first knife surface (5). The first The left positioning bevel (7) is located on the left side of the first cutting surface (5), the first right positioning bevel (8) is located on the right side of the first cutting surface (5), and the bevel extension line of the first left positioning bevel (7) and the bevel extension line of the first right positioning bevel (8) converge to form a V shape; the blade (2) is provided with a second cutting surface (9) that contacts and cooperates with the first cutting surface (5), a second upper positioning surface (10) that contacts and cooperates with the first upper positioning surface (6), a second left positioning bevel (11) that contacts and cooperates with the first left positioning bevel (7), and a second right positioning bevel (12) that contacts and cooperates with the first right positioning bevel (8).

2. A milling cutter with a V-shaped mating surface according to claim 1, characterized in that: A countersunk through hole (13) is provided in the middle of the blade (2), and the countersunk through hole (13) passes through the second cutting surface (9). A threaded hole (14) is recessed in the middle of the first cutting surface (5), and the threaded hole (14) is used to communicate with the countersunk through hole (13). The stud of the locking bolt (18) passes through the countersunk through hole (13) and is threadedly connected with the threaded hole (14), and the nut of the locking bolt (18) is accommodated in the countersunk through hole (13).

3. A milling cutter with a V-shaped mating surface according to claim 1, characterized in that: Grooves (15) are provided between the first left positioning inclined surface (7) and the first tool mounting surface (5), between the first right positioning inclined surface (8) and the first tool mounting surface (5), and between the first upper positioning surface (6) and the first tool mounting surface (5), and the corners of the second tool mounting surface (9) are located at the corresponding grooves (15).

4. The milling cutter with a V-shaped mating surface according to claim 1, characterized in that: An escape groove (16) is provided at the corner between the first left positioning inclined surface (7) and the first upper positioning surface (6), and a cutting edge of the blade (2) is accommodated in the escape groove (16).

5. The milling cutter with a V-shaped mating surface according to claim 1, characterized in that: The included angle between the first left positioning inclined surface (7) and the first right positioning inclined surface (8) is 90°.

6. The milling cutter with a V-shaped mating surface according to claim 1, characterized in that: A quick-installation groove (17) is recessed at the top end of the knife body (1).

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