CN222856817U - Milling cutter - Google Patents

Abstract

The utility model provides a milling cutter for solve the milling cutter of prior art that mentions among the background art can make the chip that produces in milling and carving the in-process can accumulate in the chip groove, chip removal speed is slower, and the chip overlength will influence the technical problem of machined part surface quality, including tool bit portion and stalk portion, the tool bit portion is kept away from on the stalk portion tip and is provided with a plurality of chip cutting edges in proper order unequally spaced apart, a plurality of the chip cutting edge radially outwards extends along the tool bit portion and forms preceding cutting face, wiper and back knife face in proper order, angle between wiper and the chip cutting edge is 7-10 contained angle and wiper length is 0.6mm-0.7mm, the tool bit portion side is provided with the cutting edge along circumference, the cutting edge is followed the axis spiral setting of tool bit portion, adjacent be equipped with the chip removal passageway between the cutting edge, be provided with a plurality of chip blowing holes on the chip removal passageway, be provided with on the stalk portion axis and blow the chip passageway and blow chip cutting hole and switch on connection.

Description

Milling cutter

Technical Field

The utility model relates to the technical field of milling cutters, in particular to a milling cutter.

Background

The end milling cutter is the most used milling cutter on the numerical control machine, and the cylindrical surface and the end face of the cutter body are provided with cutting blades which can be used for cutting simultaneously or independently. The method is mainly used for plane milling, groove milling, step surface milling and profiling milling.

Prior art milling cutters, such as the patent document entitled "insert milling cutter" with the publication number CN212551929U, disclose a milling cutter comprising a shank portion and a cutting portion. The blade part comprises a spiral milling cutter part and a plurality of straight flute forming blade parts which are connected by a neck part. And a chip removal groove is arranged behind the straight groove forming blade part. The spiral milling cutter part is of unequal design and is uniformly divided into a plurality of spiral milling cutter groups on the circumference, and each spiral milling cutter group comprises a large-angle milling cutter edge and a small-angle milling cutter edge. The angle of the large angle milling blade is greater than the angle of the small angle milling blade. The large-angle milling blade and the small-angle milling blade are arranged at intervals on the circumference.

The milling cutter of the patent document can enable generated chips to be accumulated in the chip removal groove in the milling process, the chip removal speed is low, and the surface quality of a machined part can be affected due to overlong chips.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art, and provides a milling cutter which is used for solving the technical problems that chips generated in the milling process of the milling cutter in the prior art in the background art can be accumulated in chip grooves, the chip removal speed is low, and the surface quality of a machined part can be influenced by overlong chips.

The technical aim of the utility model is realized by the following technical scheme:

The utility model provides a milling cutter, includes tool bit portion and stalk portion, the tool bit portion is kept away from on the stalk portion tip and is provided with a plurality of cutting edges in proper order unequally spaced, a plurality of cutting edges radially outwards extend along the tool bit portion and form preceding knife face, wiper blade and back knife face in proper order, angle between wiper blade and the cutting edge is 7-10 contained angles and wiper blade length is 0.6mm-0.7mm, the tool bit portion side is provided with the cutting edge along circumference, the cutting edge follows the axis spiral setting of tool bit portion, adjacent be equipped with the chip removal passageway between the cutting edge, be provided with a plurality of bits blowing holes on the chip removal passageway, be provided with on the stalk portion axis and blow bits passageway and blow bits hole conduction connection with a plurality of bits blowing holes.

Working principle:

The chip edge of the cutter head can carry out chip cutting operation on the surface of a workpiece to be cut, the smoothing edge on the chip edge can carry out smoothing treatment on the surface of the workpiece to be processed during chip cutting, the cutting edge can carry out chip cutting on the workpiece to be processed, and the cut scraps can be discharged out of a chip removing channel on the cutting edge, and the scrap blowing channel can be matched with a chip blowing hole to clean scraps in the chip removing channel.

Compared with the prior art, the utility model has the following beneficial effects:

Firstly, be equipped with cutting edge and coping sword, the cutting edge can carry out cutting operation to the work piece surface of being processed, and angle between coping sword and the cutting edge is 7-10, and length is 0.6mm-0.7mm, can not arouse strong vibration during this within range, has improved the process stability, has alleviateed the wearing and tearing of cutting edge.

And secondly, a cutting edge and a chip removing channel are arranged, the cutting edge can cut a workpiece, and waste chips generated by cutting can be discharged to the outside through the spiral chip removing channel.

And thirdly, a chip blowing channel and a chip blowing hole are formed, external air flow can be led to the chip blowing hole through the chip blowing channel, and the chip blowing hole can blow off the chip blowing channel or scraps attached to the surface of the workpiece.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the rake face, the wiper edge and the relief face;

FIG. 3 is a schematic view of the structure of the cutting edge;

FIG. 4 is a schematic cross-sectional view of the shank and cutting edge;

FIG. 5 is a schematic cross-sectional view of a cutting edge;

Fig. 6 is a schematic cross-sectional structure of the chip breaker.

The reference numerals illustrate a shank portion 1, a head portion 2, a chip edge 3, a rake face 4, a wiper edge 5, a flank face 6, a cutting edge 7, a chip removal passage 8, a chip blowing hole 9, a chip blowing passage 10, and a chip dividing groove 11.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

Examples:

As shown in fig. 1, the milling cutter comprises a cutter head 2 and a handle 1, wherein a plurality of cutting edges 3 are sequentially arranged at unequal intervals on the end part, far away from the handle 1, of the cutter head 2, the cutting edges 3 can carry out cutting operation on the surface of a workpiece, the plurality of cutting edges 3 sequentially form a rake face 4, a smoothing edge 5 and a relief face 6 along the radial outward extension of the cutter head 2, and the surface of the workpiece to be processed can be subjected to smoothing treatment during cutting through the smoothing edge 5.

As shown in fig. 1, 2 and 3, the angle between the wiper 5 and the cutting edge 3 is 7 ° -10 °, the angle between the wiper 5 and the cutting edge 3 is 0.6mm-0.7mm in fig. 2, the length of the wiper 5 is 0.6mm-0.7mm, the tip is arc-shaped, the angle between the rear blade 6 and the axial rake angle of the head 2 is 1 ° -3 °, the angle between the rear blade 6 and the axial rake angle of the head 2 in fig. 2c is 11 ° -13 °, the angle between the front blade 4 and the cutting edge 3 in fig. 2b is 0.1mm-0.2mm, the center cutting edge width of the cutting edge 3 is 0.1mm-0.2mm, the strong vibration is reduced during machining, the machining stability is improved, the abrasion of the cutting edge 3 is reduced, the workpiece is machined by the cooperation of the wiper 5, the machined workpiece is simultaneously subjected to light treatment, the rough and fine machining efficiency is improved, and the machining efficiency is improved.

As shown in fig. 1 and 6, the side surface of the cutter head 2 is provided with cutting edges 7 along the circumferential direction, the cutting edges 7 are spirally arranged along the axis of the cutter head 2, chip removing channels 8 are arranged between adjacent cutting edges 7, a plurality of chip blowing holes 9 are arranged on the chip removing channels 8, chip blowing channels 10 are arranged on the axis of the handle 1 and are in conductive connection with the chip blowing holes 9, scraps generated during cutting can be discharged to the outside along the chip removing channels 8, scraps attached to the surfaces of a workpiece and the chip removing channels 8 can be blown away through the chip blowing channels 10 and the chip blowing holes 9, damage to the cutting edges 7 or the chip removing edges 3 caused by friction between the scraps and the cutting edges 7 or the chip removing edges 3 is avoided, a plurality of chip dividing grooves 11 are arranged on the cutting edges 7, the distances between the chip dividing grooves 11 are unequal, the width of the chip dividing grooves 11 is in a structure with narrow front and wide back, the chip dividing grooves are in inclined rice grain shape, and small scraps can be discharged to the outside through the chip dividing grooves 11.

As shown in fig. 1, 4 and 5, the core thickness of the cutter head 2 is 9mm-11mm, the rake angle of the cutting edge 7 is 15-17 degrees, f is the core thickness in fig. 4, e is the rake angle, the first relief angle of the cutting blade is 9-12 degrees, the second relief angle of the cutting blade is 24-27 degrees, g is the first relief angle in fig. 5, and h is the second relief angle.

Working principle:

The chip blade 3 and the cutting blade 7 can carry out cutting operation on the surface of a workpiece to be processed, the smoothing blade 5 on the chip blade 3 can carry out smoothing treatment on the surface of the workpiece to be processed when cutting, and the finish degree of the processing surface of the workpiece can be improved, so that the requirement of semi-finishing processing in the workpiece processing process is met, the scraps of the chips generated by the cutting blade 7 and the chip blade 3 are discharged to the outside through the chip removing channel 8 in a spiral manner, smaller scraps can be discharged to the outside through the chip dividing groove 11, and by injecting external high-pressure air flow into the chip blowing channel 10, the air flow blows away the scraps attached to the chip blowing channel 10 or the surface of the workpiece through the chip blowing hole 9, and the service lives of the cutting blade 7 and the chip blade 3 are prevented from being reduced due to friction between the scraps and the cutting blade 7 and the chip blade 3.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims (8)

1. The utility model provides a milling cutter, its characterized in that, includes tool bit portion (2) and the stalk portion (1) of being connected with tool bit portion (2), the tool bit portion (2) is kept away from on stalk portion (1) tip and is provided with a plurality of cutting edges (3) in proper order unequally spaced apart, a plurality of cutting edges (3) are along tool bit portion (2) radial outside extension form preceding knife face (4), wiper blade (5) and back knife face (6) in proper order, the angle is 7-10 contained angle and wiper blade (5) length are 0.6mm-0.7mm between wiper blade (5) and the cutting edge (3), tool bit portion (2) side is provided with cutting edge (7) along circumference, cutting edge (7) are followed the axis spiral setting of tool bit portion (2) is equipped with chip removal passageway (8) between cutting edge (7), be provided with a plurality of chip blowing holes (9) on chip removal passageway (8), be provided with on the axis of stalk portion (1) and blow chip passageway (10) and be connected with a plurality of chip blowing holes (9).

2. A milling cutter according to claim 1, wherein the wiper (5) and the relief surface (6) form a nose, which nose has an arcuate configuration.

3. A milling cutter according to claim 2, characterized in that the angle between the flank surface (6) and the axial rake angle of the axis of the head (2) is 1 ° -3 °.

4. A milling cutter according to claim 2, characterized in that the angle between the rake surface (4) and the cutting edge (3) is 11 ° -13 °.

5. A milling cutter according to claim 1, characterized in that the cutting edge (3) has a central cutting width of 0.1-0.2 mm.

6. A milling cutter according to claim 1, characterized in that the core thickness of the head portion (2) is 9-11 mm and the rake angle of the cutting edge (7) is 15 ° -17 °.

7. A milling cutter according to claim 1, characterized in that the first relief angle of the cutting edge (7) is 9 ° -12 °, and the second relief angle of the cutting edge (7) is 24 ° -27 °.

8. The milling cutter according to claim 1, wherein the cutting edge (7) is provided with a plurality of chip-dividing grooves (11), the distances between the chip-dividing grooves (11) are unequal, the chip-dividing grooves (11) are in a structure with narrow front and wide rear, and the chip-dividing grooves are in a shape of oblique rice grains.