CN217121890U

CN217121890U - Spiral end mill

Info

Publication number: CN217121890U
Application number: CN202220985377.7U
Authority: CN
Inventors: 曾祥胜
Original assignee: Shenzhen Derui Precision Technology Co ltd
Current assignee: Shenzhen Derui Precision Technology Co ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-08-05
Anticipated expiration: 2032-04-27

Abstract

The utility model relates to a technical field of processing cutter, concretely relates to spiral end mill, it includes the handle of a knife and with handle of a knife integrated into one piece's tool bit, the tool bit comprises many cutting edges, and the tool bit is located and constitutes sunken chip groove between many cutting edges, the cutting edge has crosscut portion, chamfer portion, first transition portion has between crosscut portion and the chamfer portion, crosscut portion forms the crosscut edge with adjacent chip groove, chamfer portion forms the chamfer edge with adjacent chip groove, the crosscut edge is close to chamfer edge and is equipped with first segmental arc. The cutting bits generated are guided through the chip grooves, so that resistance borne by the cutter head during cutting is reduced, and the cutting bits can be effectively discharged; through setting up the structural stability of first transition portion strengthened transverse cutting portion, prevent that transverse cutting portion from collapsing the sword man-hour, having prolonged the life of whole cutter, increased the effective cutting length of transverse cutting edge and work piece through setting up first segmental arc, improved machining efficiency.

Description

Spiral end mill

Technical Field

The application relates to the field of machining cutters, in particular to a spiral end mill.

Background

The milling cutter is a rotary cutter which is used for milling and provided with one or more cutter teeth, each cutter tooth intermittently cuts off the allowance of a workpiece once when in work, the milling cutter is mainly used for processing planes, steps, grooves, formed surfaces, cutting off the workpiece and the like on a milling machine, the milling cutter is a tool which is commonly used in the field of mechanical production and processing, the service life of the cutter, the surface quality of the processed workpiece and the processing stability are main factors for measuring the quality of the cutter, and the quality of the performances of the cutter is mainly determined by the structure of the cutter except the relation with the material of the cutter.

Due to the structure of the milling cutter, the milling cutter with the traditional structure needs to be replaced due to abrasion after a period of processing time, the use time is not good, and the condition needs to be further improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the length of time is not good when the milling cutter structure sets up unreasonablely to lead to using, the application provides a spiral end mill.

The application provides a spiral end mill adopts following technical scheme:

the utility model provides a spiral end mill, including the handle of a knife and with handle of a knife integrated into one piece's tool bit, the tool bit comprises many cutting edges, just the tool bit is located and constitutes sunken chip groove between many cutting edges, the cutting edge has crosscut portion, chamfer portion, crosscut portion with first transition portion has between the chamfer portion, crosscut portion with adjacent the chip groove forms the crosscut edge, chamfer portion with adjacent the chip groove forms the chamfer edge, the crosscut edge is close to the chamfer edge is equipped with first segmental arc.

By adopting the technical scheme, the cutter handle and the cutter head are integrally manufactured, the processing technology is saved, the possibility of fracture between the cutter head and the cutter handle is reduced, the chip grooves guide the generated cutting chips, the resistance on the cutter head during cutting is reduced, and the cutting chips can be effectively discharged; all have first transition portion between the crosscut portion of many cutting edges and the beveling portion, first transition portion can let the crosscut portion transition to the beveling portion, has strengthened the structural stability of crosscut portion, prevents that the crosscut portion from collapsing the sword man-hour, has prolonged the life of whole cutter, and effective cutting length of crosscut edge and work piece can be increased to first segmental arc, improves machining efficiency.

Optionally, the transverse cutting portion includes a transverse section disposed adjacent to the transverse cutting edge and an inclined plane located on a side of the transverse section away from the transverse cutting edge, and the transverse section and the inclined plane form a break angle.

By adopting the technical scheme, when the cutting edge cuts, the chip removal groove can extrude cutting chips, and the chip removal space is further enlarged by the inclined surface, so that the chip removal groove can contain more cutting chips; meanwhile, when the chip discharge groove extrudes the cutting chips, the inclined surface reduces the extrusion of the cutting chips on the transverse cutting part, and the cutting effect of the milling cutter is further ensured.

Optionally, a guide groove is arranged between adjacent cross sections, and the guide groove is communicated with the chip discharge groove.

Through adopting above-mentioned technical scheme, the chip removal space has further been increaseed in the setting of guide way, and the cutting bits that the tool bit is close to central axis department can be arranged to the guide way simultaneously, with this part cutting bits direction chip groove, has improved chip removal efficiency.

Optionally, the chamfer part comprises a chamfer surface adjacent to the chamfer edge and an avoiding surface located on one side of the chamfer surface far away from the chamfer edge, and the avoiding surface is arc-shaped and is concave towards the chip groove.

Through adopting above-mentioned technical scheme, the scarf can process the chamfer of work piece, dodges the face and reduces the contact of chamfer and work piece, and then reduces the frictional force that the tool bit received, improves milling cutter's chamfer machining efficiency, simultaneously, dodges and personally submit the arc court the chip groove is sunken can further increase the chip removal space, makes the chip groove can hold more cuttings.

Optionally, a second arc-shaped segment is arranged at one end of the beveled edge close to the transverse cutting edge.

Through adopting above-mentioned technical scheme, the effective cutting length of chamfer edge and work piece can be increased to the second arc section, improves machining efficiency.

Optionally, the number of the cutting edges is four, and the four cutting edges are distributed in an unequal manner in the circumferential direction.

By adopting the technical scheme, the vibration generated during cutting can be reduced by adopting the unequal distribution arrangement, and the anti-seismic performance of the whole cutter is enhanced.

Optionally, the four cutting edges are an edge a, an edge B, an edge C and an edge D in sequence along the circumferential direction, the edge a is connected with the edge C to form a drilling tip, and the central sharp angle of the drilling tip is a flat angle of 180 °.

Through adopting above-mentioned technical scheme, the central closed angle that will bore the point portion sets up to the straight angle to ensure the roughness of tank bottom when processing the recess.

Optionally, a groove is arranged between the blade B and the drilling tip, and a groove is arranged between the blade D and the drilling tip.

Through adopting above-mentioned technical scheme, the setting of recess can be guaranteed that the cutting is smooth and easy, remedies the too flat defect that causes the cutting force to reduce of center closed angle, and the setting of recess further improves the efficiency that the tool bit is close to central axis department chip removal simultaneously.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the cutter handle and the cutter head are integrally formed, so that the processing technology can be saved, the possibility of fracture between the cutter head and the cutter handle is reduced, the chip discharge grooves can guide the generated cutting chips, the resistance borne by the cutter head during cutting is reduced, and the cutting chips can be effectively discharged; the first transition part can enhance the structural stability of the transverse cutting part, prevent the transverse cutting part from breaking during machining, prolong the service life of the whole cutter, increase the effective cutting length of the transverse cutting edge and a workpiece by the first arc-shaped section, and improve the machining efficiency;

2. the four cutting edges are distributed in the circumferential direction in an unequal manner, so that the vibration generated during cutting is reduced, and the anti-seismic performance of the whole cutter is enhanced;

3. the drill point part arranged at the straight angle is convenient for ensuring the flatness of the groove bottom when the groove is processed.

Drawings

FIG. 1 is a schematic view of a helical end mill according to an embodiment of the present application;

FIG. 2 is a top view of a tool tip of a helical end mill according to an embodiment of the present application.

Description of reference numerals: 1. a knife handle; 2. a cutter head; 3. a cutting edge; 4. a chip groove; 5. a transverse cutting part; 6. a chamfered portion; 7. a first transition portion; 8. transversely cutting the edge; 9. beveling the edges; 10. a first arcuate segment; 11. a chamfer plane; 12. an avoidance surface; 13. a second arcuate segment; 14. cutting into a cross section; 15. a bevel; 16. a guide groove; 17. a, cutting edge; 18. a blade B; 19. a C blade; 20. a D blade; 21. drilling a tip part; 22. and (6) a groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses spiral end mill. Referring to fig. 1 and 2, the helical end mill includes a shank 1 and a cutter head 2, the cutter head 2 is integrally formed with the shank 1, the cutter head 2 is composed of a plurality of cutting edges 3, and the cutter head 2 is located between the plurality of cutting edges 3 to form a recessed chip groove 4. The integrally formed tool bit 2 and the tool shank 1 save a processing process, the possibility of fracture of the tool shank 1 and the tool bit 2 is reduced, and the chip discharge grooves 4 are spirally arranged and used for guiding cutting chips generated during workpiece processing, reducing resistance borne by the tool bit 2 during cutting and effectively discharging the cutting chips; specifically, the cutting head 2 is composed of four cutting edges 3, and the number of the cutting edges can be other numbers according to actual requirements during manufacturing.

In the present embodiment, the cutting edge 3 has a transverse cutting portion 5 and a chamfer portion 6, a first transition portion 7 is provided between the transverse cutting portion 5 and the chamfer portion 6, the transverse cutting portion 5 and the adjacent flute 4 form a transverse cutting edge 8, the chamfer portion 6 and the adjacent flute 4 form a chamfer cutting edge 9, and the transverse cutting edge 8 is provided with a first arc-shaped section 10 near the chamfer cutting edge 9. The transverse cutting part 5 can be used for drilling, and the beveling part 6 can be used for processing chamfers, so that after a worker punches a workpiece through a milling cutter, the chamfer processing treatment can be directly performed on the part of the workpiece needing chamfer through the beveling part 6 without replacing the milling cutter, the operation is simple and easy, and the working efficiency is improved; first segmental arc 10 can increase the effective cutting length of crosscut edge 8 and work piece, improves machining efficiency, because the existence of first transition portion 7, makes the structure of crosscut portion 5 more stable, prevents that crosscut portion 5 from collapsing the sword when processing, has prolonged the life of whole cutter.

In the embodiment, the chamfer part 6 comprises a chamfer surface 11 and an avoiding surface 12, the chamfer surface 11 is arranged adjacent to the chamfer edge 9, the avoiding surface 12 is arranged on one side of the chamfer surface 11 far away from the chamfer edge 9, and the avoiding surface 12 is concave towards the chip groove 4 in an arc shape; wherein, milling cutter processes the chamfer of work piece through scarf 11, dodges face 12 and can reduce the contact of chamfer 6 with the work piece, and then reduces the frictional force that tool bit 2 received, improves milling cutter's chamfer machining efficiency, and simultaneously, dodges face 12 and is the arc sunken towards chip groove 4, has further increaseed the chip removal space, makes chip groove 4 can hold more cuttings. Further, the chamfered edge 9 is provided with a second arc-shaped section 13 near one end of the transversal edge 8. The second arcuate section 13 increases the effective cutting length of the beveled edge 9 into the workpiece, making the bevel 6 more efficient to machine.

When the cutting edge 3 cuts, the chip discharge groove 4 extrudes cutting chips, in order to reduce the extrusion of the cutting chips on the transverse cutting part 5 and further ensure the cutting effect of the milling cutter, referring to fig. 2, the transverse section 14 comprises a transverse section 14 and an inclined surface 15, the transverse section 14 is arranged adjacent to the transverse cutting edge 8, the inclined surface 15 is arranged on one side of the transverse section 14, which is far away from the transverse cutting edge 8, and the transverse section 14 and the inclined surface 15 form a break angle; the inclined surface 15 can further enlarge the chip removal space, so that the chip removal groove 4 can contain more cutting chips; meanwhile, when the chip discharge groove 4 extrudes the cutting chips, the inclined surface 15 reduces the extrusion of the cutting chips on the transverse cutting part 5, so that the cutting effect of the milling cutter is ensured; and because there is the dog-ear between inclined plane 15 and the cross section 14, after the work piece is cut through the cross section 14, can not continue to contact with inclined plane 15, and then reduce the friction of work piece and tool bit 2, improve milling cutter cutting stability.

Further, a guide groove 16 is arranged between the adjacent cross sections 14, and the guide groove 16 is communicated with the chip groove 4. The arrangement of the guide groove 16 further increases the chip removal space, and meanwhile, the guide groove 16 can remove the cutting chips close to the central axis of the cutter head 2, so that the cutting chips are guided to the chip removal groove 4, and the chip removal efficiency is improved.

In the embodiment of the application, the cutting edges 3 are an edge A17, an edge B18, an edge C19 and an edge D20 in turn along the anticlockwise direction of the circumference, and the four cutting edges 3 are distributed in an unequal manner; wherein, one end of the A edge 17 close to the axis of the cutter head 2 and one end of the C edge 19 close to the axis of the cutter head 2 are connected to form a drilling tip part 21. The unequal distribution is favorable for reducing vibration generated during cutting, and the anti-seismic performance of the whole cutter is enhanced. Further, the center sharp angle of the drilling tip portion 21 is a flat angle of 180 ° so as to facilitate the securing of the flatness of the groove bottom when the groove 22 is machined. Be equipped with recess 22 between B sword 18 and the drill point portion 21, also be equipped with recess 22 between D sword 20 and the drill point portion 21, recess 22 can further improve the efficiency that tool bit 2 is close to central axis department chip removal on the one hand, and on the other hand can compensate the too flat defect that causes the cutting force to reduce of center closed angle, guarantees that the cutting is smooth and easy.

The implementation principle of the spiral end mill provided by the embodiment of the application is as follows: the chip groove 4 is arranged to guide the generated cutting chips, so that resistance borne by the cutter head 2 during cutting is reduced, and the cutting chips can be effectively discharged; the first transition part 7 is arranged, so that the structural stability of the transverse cutting part 5 is enhanced, the cutter breakage of the transverse cutting part 5 during machining is prevented, the service life of the whole cutter is prolonged, the effective cutting lengths of the transverse cutting edge 8 and the oblique cutting edge 9 are increased by arranging the first arc-shaped section 10 and the second arc-shaped section 13, and the machining efficiency is improved; the four cutting edges 3 are distributed in an unequal manner in the circumferential direction, so that vibration generated during cutting can be reduced, and the anti-seismic performance of the whole cutter is enhanced.

The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a spiral end mill, including handle of a knife (1) and with handle of a knife (1) integrated into one piece's tool bit (2), its characterized in that: tool bit (2) comprise many cutting edges (3), just tool bit (2) are located and constitute sunken chip groove (4) between many cutting edges (3), cutting edge (3) have crosscut portion (5), chamfer portion (6), crosscut portion (5) with first transition portion (7) have between chamfer portion (6), crosscut portion (5) and adjacent chip groove (4) form crosscut edge (8), chamfer portion (6) and adjacent chip groove (4) form chamfer edge (9), crosscut edge (8) are close to chamfer edge (9) department is equipped with first segmental arc (10).

2. A helical end mill according to claim 1, wherein: the transverse cutting part (5) comprises a transverse cutting surface (14) and an inclined surface (15), the transverse cutting surface (14) is adjacent to the transverse cutting edge (8), the inclined surface (15) is located on one side, far away from the transverse cutting edge (8), of the transverse cutting surface (14), and the inclined surface (15) and the transverse cutting surface (14) form a folding angle.

3. A helical end mill according to claim 2, wherein: a guide groove (16) is arranged between the adjacent cross sections (14), and the guide groove (16) is communicated with the chip discharge groove (4).

4. A helical end mill according to claim 1, wherein: the chamfering part (6) comprises a chamfering surface (11) and an avoiding surface (12), wherein the chamfering surface (11) is arranged adjacent to the chamfering edge (9), the avoiding surface (12) is positioned on one side, far away from the chamfering edge (9), of the chamfering surface (11), and the avoiding surface (12) is in an arc shape and is sunken towards the chip groove (4).

5. A helical end mill according to claim 1, wherein: one end of the beveled edge (9) close to the transverse cutting edge (8) is provided with a second arc-shaped section (13).

6. A helical end mill according to claim 1, wherein: the number of the cutting edges (3) is four, and the four cutting edges (3) are distributed in the circumferential direction in an unequal manner.

7. A helical end mill according to claim 6, wherein: the four cutting edges (3) are sequentially and respectively an A edge (17), a B edge (18), a C edge (19) and a D edge (20) along the circumferential direction, the A edge (17) is connected with the C edge (19) to form a drilling tip part (21), and the central sharp angle of the drilling tip part (21) is a flat angle of 180 degrees.

8. A helical end mill according to claim 7, wherein: a groove (22) is formed between the B blade (18) and the drilling tip portion (21), and a groove (22) is formed between the D blade (20) and the drilling tip portion (21).