Milling cutter

Abstract

A milling cutter is used for solving the technical problems that in the prior art, in the milling and carving process of a milling cutter in the prior art, generated cuttings can be accumulated in a chip removal groove, the chip removal speed is low, and the surface quality of a machined part can be affected due to the fact that the cuttings are too long. A plurality of cutting blades are sequentially arranged on the end portion, away from the handle portion, of the cutter head portion at unequal intervals, the cutting blades extend outwards in the radial direction of the cutter head portion to sequentially form a front cutter face, a sleeking blade and a rear cutter face, the included angle between the sleeking blade and the cutting blades ranges from 7 degrees to 10 degrees, and the length of the sleeking blade ranges from 0.6 mm to 0.7 mm. Cutting edges are arranged on the side face of the tool bit part in the circumferential direction, the cutting edges are spirally arranged along the axis of the tool bit part, a chip removal channel is formed between every two adjacent cutting edges, a plurality of chip blowing holes are formed in each chip removal channel, and a chip blowing channel is formed in the axis of the handle part and connected with the chip blowing holes in a communicating mode.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a milling cutter. Background Art

[0002] Milling cutter is a rotating tool processed on CNC machine tools. It is mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines. End mills are the most commonly used milling cutters on CNC machine tools. There are cutting knives on the cylindrical surface and end face of the blade. They can cut at the same time or separately. It is mainly used for plane milling, groove milling, step surface milling and profile milling.

[0003] The milling cutter of the prior art, such as the utility model patent document with the authorization announcement number "CN212551929U" and the patent name "A Plunge Milling Cutter", discloses a milling cutter, including a shank and a blade. The blade includes a spiral milling cutter portion and a plurality of straight groove forming blade portions, which are connected by a neck. Behind the straight groove forming blade portion is a chip removal groove. The spiral milling cutter portion is of unequal design and is evenly divided into a plurality of spiral milling cutter groups on the circumference, and each spiral milling cutter group includes a large-angle milling cutter blade and a small-angle milling cutter blade. The angle of the large-angle milling cutter blade is greater than the angle of the small-angle milling cutter blade. The large-angle milling cutter blade and the small-angle milling cutter blade are spaced apart on the circumference.

[0004] The milling cutter in the above patent document will cause the generated chips to accumulate in the chip groove during the milling process. The chip removal speed is slow and the excessively long chips will affect the surface quality of the workpiece. Utility Model Content

[0005] The utility model aims to propose a milling cutter in view of the deficiencies of the prior art, so as to solve the technical problems mentioned in the background technology that the milling cutter of the prior art will cause the chips generated to accumulate in the chip groove during the milling process, the chip removal speed is slow, and the chips are too long, which will affect the surface quality of the workpiece.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A milling cutter comprises a cutter head and a shank, wherein a plurality of chip cutting edges are arranged at unequal intervals in sequence on the cutter head away from the end of the shank, wherein the plurality of chip cutting edges extend radially outwardly from the cutter head to form a front cutting face, a wiper cutting edge and a back cutting face in sequence, wherein the angle between the wiper cutting edge and the chip cutting edge is 7°-10° and the length of the wiper cutting edge is 0.6mm-0.7mm, a cutting edge is arranged circumferentially on the side surface of the cutter head, wherein the cutting edge is spirally arranged along the axis of the cutter head, a chip removal channel is arranged between adjacent cutting edges, a plurality of chip blowing holes are arranged on the chip removal channel, a chip blowing channel is arranged on the axis of the shank and the chip blowing channel is conductively connected to the plurality of chip blowing holes.

[0008] Working principle:

[0009] The chip cutting edge of the cutter head can perform chip cutting operations on the surface of the workpiece being cut, and the finishing edge on the chip cutting edge can perform finishing treatment on the surface of the workpiece being cut during chip cutting. The cutting edge can cut the workpiece being cut and the waste chips can be discharged from the outside of the chip removal channel on the cutting edge. The chip blowing channel can cooperate with the chip blowing hole to clean the waste chips in the chip removal channel.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] First, there are chip cutting edge and wiper edge. The chip cutting edge can perform cutting operation on the surface of the workpiece being processed. The angle between the wiper edge and the chip cutting edge is 7°-10°, and the length is 0.6mm-0.7mm. Within this range, strong vibration will not be caused during processing, which improves the processing stability and reduces the wear of the chip cutting edge.

[0012] Second, a cutting edge and a chip removal channel are provided. The cutting edge can cut the workpiece and the waste chips generated by the cutting can be discharged to the outside through the spiral chip removal channel.

[0013] Thirdly, a chip blowing channel and a chip blowing hole are provided, through which the external airflow can be directed to the chip blowing hole, and the chip blowing hole can blow away the waste chips in the chip blowing channel or attached to the surface of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the rake face, the wiper edge and the flank face;

[0016] Figure 3 It is a schematic diagram of the structure of the chip cutting edge;

[0017] Figure 4 is a schematic diagram of the cross-sectional structure of the shank and the cutting edge;

[0018] Figure 5 is a schematic diagram of the cross-sectional structure of the cutting edge;

[0019] Figure 6 It is a schematic diagram of the cross-sectional structure of the chip groove.

[0020] Explanation of reference numerals: shank 1 , cutter head 2 , chip cutting edge 3 , rake face 4 , wiper edge 5 , flank face 6 , cutting edge 7 , chip removal channel 8 , chip blowing hole 9 , chip blowing channel 10 , chip dividing groove 11 . DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Example:

[0023] like Figure 1 As shown, a milling cutter comprises a cutter head 2 and a shank 1. A plurality of chip cutting edges 3 are arranged at unequal intervals on the end of the cutter head 2 away from the shank 1. The chip cutting edges 3 can be used to perform chip cutting operations on the surface of a workpiece. The plurality of chip cutting edges 3 extend radially outwardly from the cutter head 2 to form a front cutting face 4, a finishing edge 5 and a back cutting face 6 in sequence. The finishing edge 5 can be used to perform finishing operations on the surface of the workpiece when cutting chips.

[0024] like Figure 1 and Figure 2 and Figure 3 As shown, the angle between the wiper edge 5 and the chip cutting edge 3 is 7°-10°. Figure 2 a is the angle between the wiper edge 5 and the chip edge 3, the included angle and the length of the wiper edge 5 are 0.6mm-0.7mm, the wiper edge 5 and the back face 6 form a tool tip, the tool tip is an arc structure, the angle between the back face 6 and the axial rake angle of the axis of the cutter head 2 is 1°-3°, Figure 2 c is the angle between the back face 6 and the axial rake angle of the axis of the cutter head 2, and the angle between the front face 4 and the chip edge 3 is 11°-13°. Figure 2 b is the angle between the front cutting edge 4 and the chip cutting edge 3. The center width of the chip cutting edge 3 is 0.1mm-0.2mm. Within this range, the strong vibration caused during processing is reduced, the processing stability is improved, and the wear of the chip cutting edge 3 is reduced. When processing the workpiece, the polishing treatment is performed on the workpiece at the same time through the coordinated use of the polishing edge 5, so that the rough and fine processing operations on the workpiece can be performed at the same time, thereby improving the processing efficiency. Figure 3 d is the center blade width.

[0025] like Figure 1 and Figure 6 As shown, a cutting edge 7 is circumferentially arranged on the side of the cutter head 2, and the cutting edge 7 is spirally arranged along the axis of the cutter head 2. A chip removal channel 8 is arranged between adjacent cutting edges 7, and a plurality of chip blowing holes 9 are arranged on the chip removal channel 8. A chip blowing channel 10 is arranged on the axis of the handle 1, and the chip blowing channel 10 is conductively connected with the plurality of chip blowing holes 9. Waste chips generated during cutting can be discharged to the outside along the chip removal channel 8, and the waste chips attached to the surface of the workpiece and the chip removal channel 8 can be blown away by the chip blowing channel 10 and the chip blowing holes 9, so as to avoid damage to the cutting edge 7 or the chip cutting edge 3 caused by friction between the waste chips and the cutting edge 7 or the chip cutting edge 3. A plurality of chip dividing grooves 11 are arranged on the cutting edge 7, and the distances between the chip dividing grooves 11 are unequal. The width of the chip dividing groove 11 is a structure that is narrow in front and wide in the back, and the chip dividing groove is in the shape of an oblique rice grain, and smaller waste chips can be discharged to the outside through the chip dividing groove 11.

[0026] like Figure 1 and Figure 4 and Figure 5 As shown, the core thickness of the cutter head 2 is 9mm-11mm, and the front angle of the cutting edge 7 is 15°-17°. Figure 4 f is the core thickness, e is the front angle, the first back angle of the cutting tool is 9°-12°, and the second back angle of the cutting tool is 24°-27°. Figure 5 Here g is the first back angle and h is the second back angle.

[0027] Working principle:

[0028] The chip cutting edge 3 and the cutting edge 7 can perform cutting operations on the surface of the workpiece being processed. The finishing edge 5 on the chip cutting edge 3 can perform finishing treatment on the surface of the workpiece being processed during chip cutting, which can improve the smoothness of the workpiece surface, thereby meeting the needs of semi-finishing during the workpiece processing process. The waste chips cut by the cutting edge 7 and the chip cutting edge 3 are spirally discharged to the outside through the chip discharge channel 8, and the smaller waste chips can be discharged to the outside through the chip dividing groove 11. By injecting external high-pressure airflow into the chip blowing channel 10, the airflow blows away the waste chips attached to the chip blowing channel 10 or attached to the workpiece surface through the chip blowing hole 9, thereby avoiding the friction between the waste chips and the cutting edge 7 and the chip cutting edge 3, which leads to a reduction in the service life of the cutting edge 7 and the chip cutting edge 3.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A milling cutter, characterized in that: The invention comprises a cutter head (2) and a shank (1) connected to the cutter head (2); a plurality of chip cutting edges (3) are arranged at unequal intervals on the end of the cutter head (2) away from the shank (1); the plurality of chip cutting edges (3) extend radially outward from the cutter head (2) to form a front cutting edge (4), a wiper cutting edge (5) and a rear cutting edge (6) in sequence; the angle between the wiper cutting edge (5) and the chip cutting edge (3) is 7°-10° and the length of the wiper cutting edge (5) is 0.6mm-0.7mm; a cutting edge (7) is arranged circumferentially on the side surface of the cutter head (2); the cutting edge (7) is spirally arranged along the axis of the cutter head (2); a chip removal channel (8) is arranged between adjacent cutting edges (7); a plurality of chip blowing holes (9) are arranged on the chip removal channel (8); a chip blowing channel (10) is arranged on the axis of the shank (1) and the chip blowing channel (10) is conductively connected to the plurality of chip blowing holes (9).

2. A milling cutter according to claim 1, characterized in that: A tool tip is formed between the wiper edge (5) and the back tool surface (6), and the tool tip is an arc-shaped structure.

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

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

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

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

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

8. A milling cutter according to claim 1, characterized in that: The cutting edge (7) is provided with a plurality of chip dividing grooves (11) and the distances between the chip dividing grooves (11) are unequal; the width of the chip dividing grooves (11) is a structure that is narrow at the front and wide at the back, and the chip dividing grooves are in an oblique rice grain shape.

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