CN212495619U - Ball end mill with three relief angles - Google Patents

Abstract

The utility model relates to the field of end mills, in particular to a ball end mill with three relief angles, which comprises a handle and a cutting edge, wherein the handle is connected with the cutting edge, the cutting edge is provided with a helical cutting edge and a chip groove, the chip groove extends to the front center of the cutting edge, the helical cutting edge is sequentially provided with a first rear cutter face, a second rear cutter face and a third rear cutter face, the first rear cutter face, the second rear cutter face and the third rear cutter face respectively form a first relief angle, a second relief angle and a third relief angle with the cutting face, the first rear cutter face, the second rear cutter face and the third rear cutter face respectively form a first relief angle, a second relief angle and a third relief angle with the cutting face, so that two layers of cutting edges are formed on the cutting edges of the ball-end milling cutter, the arrangement of the double layers of cutting edges strengthens the cutting capability of the ball-end milling cutter, and when a workpiece with stronger toughness is machined, the ball end mill is prevented from breaking the cutting edge due to impact force from a workpiece, and the service life of the ball end mill is prolonged.

Description

Ball end mill with three relief angles

Technical Field

The utility model belongs to the technical field of end mill and specifically relates to a bulb of three relief angles end mill is related to.

Background

The ball end mill is a cutter with a cutting edge similar to a ball head and used for milling various curved surfaces and arc grooves on a milling machine, along with the improvement of the surface finish requirement of a product, the surface finish requirement of a mold cavity is improved, the original grinding and polishing are saved, and the finish required by the mold cannot be achieved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.

The utility model provides a bulb end mill of three relief angles, includes handle of a knife, cutting edge, and the handle of a knife is connected with the cutting edge, is provided with helical blade, chip groove on the cutting edge, and the chip groove extends to the front end center department of cutting edge, has set gradually first back knife face, second back knife face, third back knife face on the helical blade, and first back knife face, second back knife face, third back knife face are formed with first relief angle, second relief angle, third relief angle with the cutting face respectively.

Further, the angle of the primary relief angle is set to 0 ° to 5 °, the angle of the secondary relief angle is set to 10 ° to 20 °, and the angle of the secondary relief angle is set to 25 ° to 35 °.

Furthermore, the spiral cutting edges and the chip flutes are arranged around the centers of the cutting edges.

Furthermore, the cutting edge is made of hard alloy.

Furthermore, the cutting edge is made of tungsten carbide hard alloy.

Furthermore, a chamfer angle of 45 degrees is arranged at the joint of the cutter handle and the cutting edge.

Compared with the prior art, the beneficial effects of the utility model are that: a three relief angle ball end mill, through extending the chip groove to the front end center of the cutting edge, improve the chip removal ability of the ball end mill, prevent the scrap chip produced in the course of processing from stopping up the cutting hole of the work piece when unable to get rid of in time, make the ball end mill stuck in the cutting hole and unable to further process, reduce the working efficiency; first relief angle, second relief angle, third relief angle are formed with the cutting face respectively through first back knife face, second back knife face, third back knife face, make and form two-layer cutting edge on ball end mill's the cutting edge, and ball end mill's cutting ability is strengthened in the setting up of double-deck cutting edge, makes when processing the work piece that toughness is stronger, prevents that ball end mill from making the cutting edge break the sword and then prolong ball end mill's life because of receiving from the work piece impact force.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic view of the present invention;

fig. 3 is a schematic view of the present invention.

In the figure: the tool comprises a tool shank 1, a cutting edge 2, a spiral cutting edge 3, a chip groove 4, a first rear tool face 5, a second rear tool face 6, a third rear tool face 7 and a chamfer 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-2, in the embodiment of the utility model, a ball end mill of three relief angles, including handle of a knife 1, cutting edge 2, handle of a knife 1 is connected with cutting edge 2, be provided with helical blade 3 on cutting edge 2, chip pocket 4 extends to the front end center department of cutting edge 2, helical blade 3 is last to have set gradually first back knife face 5, second back knife face 6, third back knife face 7, first back knife face 5, second back knife face 6, third back knife face 7 is formed with first relief angle, second relief angle, third relief angle with the cutting face respectively.

A ball end mill with three relief angles is characterized in that a chip removal groove 4 extends to the center of the front end of a cutting edge 2, so that the chip removal capacity of the ball end mill is improved, the situation that a workpiece cutting hole is blocked when scraps generated in the machining process cannot be removed in time is prevented, the ball end mill is clamped in the cutting hole and cannot be further machined, and the working efficiency is reduced; first relief angle, second relief angle, third relief angle are formed with the cutting face respectively through first flank 5, second flank 6, third flank 7, make and form two-layer cutting edge 2 on ball end mill's the cutting edge 2, and the cutting ability of ball end mill is strengthened in the setting up of double-deck cutting edge 2, makes when processing the work piece that toughness is stronger, prevents that ball end mill from making cutting edge 2 break the sword and then prolong ball end mill's life because of receiving from the work piece impact force.

Further, the angle of the first rear angle is set to be 0-5 degrees, the angle of the second rear angle is set to be 10-20 degrees, and the angle of the third rear angle is set to be 25-35 degrees; the angle is moderate, the strength of the edge of the cutting edge 2 is enhanced, and the cutting edge 2 is prevented from being damaged due to too thin edge in processing.

Furthermore, two helical blades 3 and two chip flutes 4 are arranged, and the helical blades 3 and the chip flutes 4 are arranged around the center of the cutting blade 2; through all setting up helical cutting edge 3, chip groove 4 around the center of cutting edge 2, make ball end mill dynamics when processing the work piece balanced and then improve the quality of work piece processing.

Furthermore, the cutting edge 2 is made of hard alloy; the strength of the cutting edge 2 is enhanced to enhance the cutting ability of the cutting edge 2 and improve the work efficiency.

Further, the cutting edge 2 is made of tungsten carbide hard alloy; the tungsten carbide hard alloy has high hardness, and the cutting capability of the cutting edge 2 is enhanced, so that the rotating speed and the feed rate are improved.

Referring to fig. 3, further, a chamfer 8 with an angle of 45 degrees is arranged at the joint of the tool shank 1 and the cutting edge 2; through the setting of chamfer 8, avoid bulb end mill's closed angle fish tail user or other parts, because of the diameter of handle of a knife 1 is different with the diameter of cutting edge 2, chamfer 8 still has excessive effect.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (6)

1. The utility model provides a ball end mill of three relief angles, its characterized in that, includes handle of a knife, cutting edge, and the handle of a knife is connected with the cutting edge, is provided with helical blade, chip groove on the cutting edge, and the chip groove extends to the front end center department of cutting edge, has set gradually first back knife face, second back knife face, third back knife face on the helical blade, and first back knife face, second back knife face, third back knife face are formed with first relief angle, second relief angle, third relief angle with the cutting face respectively.

2. A three relief ball end mill according to claim 1, wherein the angle of the first relief angle is set to 0 ° to 5 °, the angle of the second relief angle is set to 10 ° to 20 °, and the angle of the second relief angle is set to 25 ° to 35 °.

3. A three relief ball nose end mill according to claim 1, wherein there are two helical cutting edges and two chip flutes, each disposed about the center of the cutting edge.

4. A three relief ball nose end mill according to claim 1, wherein the cutting edge is of cemented carbide.

5. A three relief ball nose end mill according to claim 1, wherein the cutting edge is of cemented tungsten carbide.

6. A three relief ball nose end mill according to claim 1, wherein the junction of the shank and the cutting edge is provided with a 45 ° chamfer.

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