CN213997964U

CN213997964U - Milling cutter convenient to chip removal

Info

Publication number: CN213997964U
Application number: CN202023107497.7U
Authority: CN
Inventors: 曾祥胜; 赖海强; 方恋; 林移风; 毛亚平
Original assignee: Shenzhen Derui Precision Technology Co ltd
Current assignee: Shenzhen Derui Precision Technology Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-08-20
Anticipated expiration: 2030-12-21

Abstract

The utility model relates to a milling cutter convenient to chip removal, it includes tool bit and handle of a knife, and the tool bit includes at least one cutting edge, and the cutting edge is including revolving the faceted pebble, interior faceted pebble, chip removal face to and guide part, the guide part include with revolve the facet adjacent narrow face, the narrow face with revolve and form the dog-ear between the faceted pebble. During machining, the milling cutter is fixed by the machining equipment in a mode of fixing the cutter handle, and the milling cutter performs cutting operation on workpiece materials through a cutting edge. The cutting edge forms a rotary cutting edge through the rotary cutting surface and the inner cutting surface, and the cut waste can enter the chip removal gap along the chip removal surface or the guide part and is separated from the milling cutter, so that the accumulation of the waste on the milling cutter is reduced. After the workpiece material is cut by the rotary blade face, a bevel is formed between the narrow face and the rotary blade face, so that the contact between the narrow face and the workpiece surface can be reduced, and the damage of the vibration of the milling cutter to the workpiece surface is reduced. The method has the effect of improving the surface smoothness of the machined workpiece.

Description

Milling cutter convenient to chip removal

Technical Field

The application relates to the field of milling cutters, in particular to a milling cutter convenient for chip removal.

Background

A milling cutter is a rotating tool for milling in a milling machine, which can remove material with a fixed feed rate in the machine, a very important milling tool in modern industrial machining. Common milling cutter on the market generally includes the handle of a knife, and handle of a knife one end is provided with a plurality of cutting edges, is provided with the chip groove between the adjacent cutting edge, and cutting edge and chip groove all are the heliciform and all distribute with the same helix angle symmetry.

Among the related art, the milling cutter with the chip removal groove disclosed in chinese utility model with the publication number CN207508380U includes a fixing section and a milling section, wherein the fixing section is used for clamping and fixing, and the milling section mills the workpiece. At least two cutter faces are arranged on the milling section, each cutter face is provided with an end face, each end face is located at one end of the milling cutter, and a chip collecting space is formed between every two adjacent cutter faces. Each cutter face is provided with a milling surface and at least two chip collecting surfaces, each chip collecting surface is a surface facing the chip collecting space, and each milling surface is provided with at least two first chip removal grooves.

Aiming at the related technologies, the inventor thinks that a large amount of waste chips can be generated in the milling process, and because the width of the first chip removal groove is small, the risk that the waste chips are difficult to pass through the first chip removal groove in time and accumulate on the notch of the first chip removal groove to cause unsmooth chip removal exists, the heat dissipation efficiency is low, and the service life of the milling cutter is influenced.

SUMMERY OF THE UTILITY MODEL

In order to improve milling cutter's life, the application provides a milling cutter convenient to chip removal.

The application provides a pair of milling cutter convenient to chip removal adopts following technical scheme:

the utility model provides a milling cutter convenient to chip removal, includes tool bit and handle of a knife, the tool bit includes at least one cutting edge, the cutting edge including revolve the cutting surface, with revolve form the interior cutting surface at rotary-cut edge between the cutting surface, with adjacent interior cutting surface forms the chip removal face in chip clearance, and connect the chip removal face with revolve the guide part of cutting surface, the guide part include with revolve the adjacent narrow face of cutting surface, the narrow face with revolve and form the dog-ear between the cutting surface.

By adopting the technical scheme, when in machining, the machining equipment fixes the milling cutter in a mode of fixing the cutter handle, and the milling cutter performs cutting operation on a workpiece material through the cutting edge. The cutting edge forms rotary-cut edge through revolving the cutting edge face and interior cutting edge face, and the waste material that is cut out can be followed chip removal face or guide part and got into the chip removal clearance and break away from milling cutter, reduces the collection of waste material on milling cutter, and then improves the radiating efficiency, increases milling cutter's life. Because the bevel is formed between the narrow surface and the rotary blade surface, after the rotary blade surface finishes cutting workpiece materials, a gap exists between the narrow surface and the workpiece surface, the contact between the narrow surface and the workpiece surface can be reduced, the damage of the vibration of a milling cutter to the workpiece surface is reduced, and the surface smoothness of the machined workpiece is improved.

Optionally, the guide part still including set up in the leptoprosopy with broad face between the chip removal face, the leptoprosopy arrives the distance of tool bit axis is greater than the broad face arrives the distance of tool bit axis, the leptoprosopy with form the fall of stepping down between the broad face.

By adopting the technical scheme, after the workpiece material is cut by the rotary blade face, the narrow face is closer to the surface of the workpiece than the wide face due to the abdication fall, so that the contact between the wide face and the workpiece is reduced, the heat generated by friction in the working process of the milling cutter is reduced, and the durability of the milling cutter is improved.

Optionally, the narrow face is provided with a polishing layer.

Through adopting above-mentioned technical scheme, the polishing layer makes the leptoprosopy comparatively smooth, causes the risk of drawing the damage to the work piece when reducing leptoprosopy and work piece surface contact.

Optionally, the chip removal surface is arcuately concave towards a direction approaching the rotary blade surface.

By adopting the technical scheme, the inner side of the cutting edge has the radian, and burrs left after the surface of the workpiece is cut are reduced.

Optionally, the chip surface gradually increases towards the direction approaching the tool shank to form a flared portion.

By adopting the technical scheme, the flaring part can increase the space of the chip removal gap close to one end of the cutter handle, so that the scraps are more easily separated from the chip removal gap.

Optionally, the flared portion is recessed in a direction approaching the tool shank and approaching the tool bit axis.

Through adopting above-mentioned technical scheme, the sunken setting of flared portion can further make the sweeps easily break away from the chip removal clearance.

Optionally, a smooth surface is arranged between the inner blade surface and the adjacent chip surface.

Through adopting above-mentioned technical scheme, the risk that the reducible sweeps of smooth face were blocked by the clearance between interior blade surface and the chip removal face makes the chip removal more smooth.

Optionally, the number of the cutting edges is 2.

Through adopting above-mentioned technical scheme, when milling cutter had more than two cutting edges, the chip removal clearance actually was the clearance that forms between two adjacent cutting edges, sets up cutting edge digit 2, can increase the chip removal space, makes the sweeps change in breaking away from milling cutter.

Optionally, the width of the wide surface is less than or equal to four times the width of the narrow surface, and the width of the wide surface is greater than or equal to two times the width of the narrow surface.

Through adopting above-mentioned technical scheme, the size of narrow face area has been decided to the area of broad face, makes the width of broad face be less than or equal to the width of quadruple narrow face and the width of more than or equal to twice narrow face, avoids the area of narrow face too big or undersize to lead to reducing the friction effect unobvious.

Optionally, the angle of the bevel is 5-18 °.

By adopting the technical scheme, the problem that the narrow-face friction reduction effect is not obvious due to the fact that the angle of the bevel is too large or too small is avoided.

Drawings

Fig. 1 is a front view of a milling cutter facilitating chip removal according to an embodiment of the present application.

Fig. 2 is a partially enlarged view at B in fig. 1.

Fig. 3 is a sectional view taken along line a-a of fig. 1.

Fig. 4 is a partially enlarged view at C in fig. 3.

Description of reference numerals: 1. a cutter head; 11. transversely cutting the edge; 12. rotary cutting the edge; 2. a blade; 21. a chip removal gap; 211. a flared part; 22. an inclined surface; 23. a transition surface; 24. cutting into a cross section; 25. internally cutting the noodles; 3. a blade body; 31. chip removal surfaces; 32. wide surface; 33. narrow sides; 34. rotating the blade surface; 35. an inner blade face; 36. a smooth surface; 37. a yielding fall; 4. a knife handle.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses milling cutter convenient to chip removal. Referring to fig. 1, the milling cutter comprises a cutter handle 4 and a cutter head 1, wherein the cutter head 1 comprises at least one spiral blade 2, and when the number of blades 2 is more than or equal to 1, a chip removal gap 21 for enabling chips to be separated from the milling cutter is formed between the adjacent blades 2; in the present embodiment, in order to increase the chip removal capability of the milling cutter while satisfying the cutting rate required by the machining, the number of the cutting edges 2 is set to 2, which is suitable for the workpiece made of the material with lower hardness, such as plastic or wood, in other embodiments, the number of the cutting edges 2 can also be adjusted according to the hardness of the actually machined workpiece.

Referring to fig. 1 and 2, an inclined surface 22, a transition surface 23, a transverse surface 24 and an inner cutting surface 25 are sequentially distributed at one end of the blade 2 away from the shank 4, wherein a transverse edge 11 for cutting a workpiece material is formed between the transverse surface 24 and the inner cutting surface 25, and one side of the inclined surface 22 away from the transition surface 23 is connected with the inner cutting surface 25 of the adjacent blade 2.

Referring to fig. 1, a blade 3 of a blade 2 is spiral, and the blade 2 is sequentially distributed with a chip removal surface 31, a guide part, a rotary blade surface 34 and an inner blade surface 35 along the circumferential direction of the excircle of the blade 1, wherein the guide part comprises a wide surface 32 and a narrow surface 33; the chip removal surface 31 and the inclined surface 22 are vertically and adjacently distributed; the wide surface 32 and the transition surface 23 are distributed adjacently up and down; the narrow face 33 and the rotary blade face 34 are respectively distributed up and down adjacently to the transverse face 24, and the joint of the rotary blade face 34 and the transverse face 24 is provided with a chamfer.

Referring to fig. 2 and 3, the rotary cutting edge 12 for cutting the workpiece material is formed by the rotary blade face 34 and the inner blade face 35, and the inner blade face 35 is curved and concaved toward the direction close to the rotary blade face 34, so that the inner side of the blade 2 has a curvature, and burrs left after the rotary cutting edge 12 is rotationally cut on the surface of the workpiece are reduced.

Referring to fig. 2, the chip evacuation gap 21 is formed between the inner edge surface 35 and the chip evacuation surface 31; in the machining state, the milling cutter is rotated at a high speed, and the chips cut by the transverse cutting edge 11 or the rotary cutting edge 12 can enter the chip discharge gap 21 along the inclined surface 22 or the chip discharge surface 31 and leave the milling cutter.

Referring to fig. 1 and 3, in order to make the chip discharging process more smooth, the chip discharging surface 31 gradually increases toward the direction close to the holder 4 to form a flared portion 211, the flared portion 211 is recessed toward the direction close to the holder 4 and close to the axis of the tool bit 1, and the flared portion 211 can increase the space of the chip discharging gap 21 close to one end of the holder 4, so that the chips can be more easily separated from the chip discharging gap 21. On the other hand, in order to reduce the risk that the waste chips are caught by the gap between the inner cutting edge surface 35 and the chip discharge surface 31, a smooth surface 36 is arranged between the inner cutting edge surface 35 and the adjacent chip discharge surface 31, and the smooth surface 36 is a cambered surface and extends spirally, so that the waste chips are not easy to accumulate and are discharged along the smooth surface 36.

Referring to fig. 2 and 4, since the milling cutter vibrates during rotation, in order to reduce damage to the surface of the workpiece caused by the vibration of the milling cutter, the cutting edge surface 34 is inclined in a direction away from the narrow surface 33 and close to the axis of the cutter head 1, so that a break angle α is formed between the narrow surface 33 and the cutting edge surface 34, and after the cutting edge surface 34 finishes cutting the workpiece, the contact between the narrow surface 33 and the surface of the workpiece is reduced, thereby improving the friction between the outer circumference of the cutter head 1 and the surface of the workpiece. Further, the narrow face 33 is polished to form a polishing layer, and the polishing layer makes the narrow face 33 smoother, so that the effect of reducing the surface damage of the workpiece is more remarkable. The angle of the folding angle alpha is 8-18 degrees; in the present embodiment, the angle of the fold angle α is preferably 15 °.

Referring to fig. 1 and 2, further, in order to reduce the heat generated during the milling process and slow down the blunting rate of the cutting edge 2, the distance between the wide surface 32 and the axis of the cutting head 1 is slightly smaller than the distance between the narrow surface 33 and the axis of the cutting head 1, and the whole wide surface 32 is recessed in the direction close to the axis of the cutting head 1, so that a relief 37 is formed at the junction of the wide surface 32 and the narrow surface 33. The offset drop 37 enables the wider surface 32 of the narrow surface 33 to be closer to the surface of the workpiece, so that the contact between the wide surface 32 and the workpiece is reduced, the heat generated by friction between the wide surface 32 and the workpiece in the working process of the milling cutter is further reduced, and the effect of improving the durability of the milling cutter is achieved.

Referring to fig. 2 and 3, specifically, in order to avoid the friction reduction effect from being insignificant due to the too large or too small area of the narrow surface 33, the width b of the wide surface 32 is set to be equal to or less than four times the width a of the narrow surface 33, and the width b of the wide surface 32 is set to be equal to or more than two times the width a of the narrow surface 33. In this embodiment, the width a of the narrow face 33 may be 1mm, and the width b of the wide face 32 may be 3 mm.

The implementation principle of the milling cutter convenient for chip removal in the embodiment of the application is as follows: during machining, the machining equipment fixes the milling cutter in a mode of fixing the cutter handle 4, and the milling cutter performs cutting operation on a workpiece material through the cutting edge 2. The cutting edge 2 forms a rotary cutting edge 12 through the cutting surface and the inner edge surface 35, and the cut waste can enter the chip removal gap 21 along the chip removal surface 31 or the guide part and is separated from the milling cutter, so that the accumulation of the waste on the milling cutter is reduced, the heat dissipation efficiency is improved, and the service life of the milling cutter is prolonged. A bevel is formed between the narrow face 33 and the cutting face, and after the cutting face finishes cutting a workpiece material, a gap exists between the narrow face 33 and the surface of the workpiece, so that the contact between the narrow face 33 and the surface of the workpiece is reduced, the damage of the vibration of a milling cutter to the surface of the workpiece is reduced, and the surface finish of the machined workpiece is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, 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 milling cutter convenient to chip removal, includes tool bit (1) and handle of a knife (4), its characterized in that: tool bit (1) includes at least one cutting edge (2), cutting edge (2) including revolve cutting face (34), with revolve cutting face (34) between form interior cutting face (35) of rotary-cut edge (12), with adjacent interior cutting face (35) form chip removal clearance (21) chip removal face (31), and connect chip removal face (31) with revolve the guide portion of cutting face (34), the guide portion include with revolve adjacent narrow face (33) of cutting face (34), narrow face (33) with form the dog-ear between cutting face (34).

2. A milling cutter for facilitating chip removal according to claim 1, wherein: the guide part is still including set up in leptoprosopy (33) with wide face (32) between chip surface (31), leptoprosopy (33) are arrived the distance of tool bit (1) axis is greater than wide face (32) are arrived the distance of tool bit (1) axis, leptoprosopy (33) with form between wide face (32) and give way drop (37).

3. A milling cutter for facilitating chip removal according to claim 2, wherein: the narrow face (33) is provided with a polishing layer.

4. A milling cutter for facilitating chip removal according to claim 1, wherein: the chip surface (31) is sunken in an arc shape towards the direction close to the rotary blade surface (34).

5. A milling cutter for facilitating chip removal according to claim 1, wherein: the chip surface (31) gradually increases towards the direction close to the cutter handle (4) to form a flared part (211).

6. A milling cutter for facilitating chip removal according to claim 5, wherein: the flared part (211) is recessed in a direction close to the tool shank (4) and close to the axis of the tool bit (1).

7. A milling cutter for facilitating chip removal according to claim 1, wherein: and a round sliding surface (36) is arranged between the inner edge surface (35) and the adjacent chip discharging surface (31).

8. A milling cutter for facilitating chip removal according to claim 1, wherein: the number of the blades (2) is 2.

9. A milling cutter for facilitating chip removal according to claim 2, wherein: the width of the wide surface (32) is less than or equal to four times the width of the narrow surface (33), and the width of the wide surface (32) is greater than or equal to two times the width of the narrow surface (33).

10. A milling cutter for facilitating chip removal according to claim 1, wherein: the angle of the break angle is 5-18 degrees.