CN100351028C

CN100351028C - Blade for bulb slotting cutter

Info

Publication number: CN100351028C
Application number: CNB2006100311114A
Authority: CN
Inventors: 马晓魁; 陈林; 姜涛; 李剑伟
Original assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Current assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Priority date: 2006-01-06
Filing date: 2006-01-06
Publication date: 2007-11-28
Anticipated expiration: 2026-01-06
Also published as: CN1792527A

Abstract

The invention provides a blade for a ball-end milling cutter. The intersection of the top surface and the two side surfaces forms two cutting edges respectively composed of a straight edge and an arc edge, and two cutting edges are formed at the intersection of the two cutting edges. One of the tool noses has a negative chamfer; the rake face where the cutting edge is located has a first rake angle γ ₁ and a second rake angle γ ₂ ; the two sides are respectively composed of the first flank face and the bottom face connected to the rake face The second flank that connects is formed, and it is characterized in that: the first rake angle γ ₁ of the rake face where the arc edge is located gradually becomes larger from the intersection of the straight edge and the arc edge to the tip of the knife, and the knife The rake face at the tip has only one rake angle γ ₃ ; the second flank face as the positioning surface is composed of a plane and an arc surface respectively provided with grooves; a number of nearly elliptical bosses are provided on the top surface; The blade of the ball-end milling cutter of the invention can adapt to the changing cutting force in profiling milling and surface milling, has small vibration, and has high processing dimension accuracy and surface quality.

Description

A kind of blade that is used for ball end mill

Technical field

The present invention relates to a kind of slotting cutter blade, especially carry out the blade that copy milling and curved surface mill the ball end mill of processing.

Background technology

Conventional ball end mill, as U.S. Pat 6135677, its cutting ability mainly is to rely on the point design of adding greatly of point of a knife to realize, European patent WO2004082877 reaches fixed blade by two locating slots of milling on the cutter hub bottom, the cutting edge of two kinds of blades is camber line shape, and the second back knife face is single smooth cambered surface, the cutting force that can't adapt to variation, vibration is big, and blade structure makes it be difficult to attrition process, blade excircle configuration precision is difficult to guarantee, thereby the workpiece size precision that processes and surface quality are not very desirable.

Summary of the invention

The present invention is directed to above-mentioned deficiency, the blade that provides a kind of copy milling and curved surface to mill the ball end mill of processing can adapt to the cutting force that changes, vibrate little, accurate to dimension and surface quality height.

The blade that is used for ball end mill of the present invention, mainly comprise end face, bottom surface and two sides, two cutting edges of being made up of straight line sword and camber line sword respectively of formation are intersected in end face and two sides, and two cutting edge intersections form two points of a knife, and one of them point of a knife has negative chamfered edge; Cutting edge place rake face has the first anterior angle γ ₁With the second anterior angle γ ₂Two sides are formed by the major first flank that joins with rake face with the second back knife face that the bottom surface joins respectively, it is characterized in that: the first anterior angle γ of described camber line sword place rake face ₁Become gradually greatly to point of a knife from the intersection point of straight line sword and camber line sword, described point of a knife place rake face all has only an anterior angle γ ₃The described second back knife face as locating surface is made up of plane and cambered surface.

The described first anterior angle γ ₁Be 10 °-20 °, the second anterior angle γ ₂Be 15 ° of-25 ° of described γ ₂＞γ ₁Described point of a knife anterior angle γ ₃＞20 ° and≤25 °.

As improvement, second the back knife face plane, cambered surface be provided with respectively groove.

As further improvement, end face is provided with some nearly ellipse around boss.

Because the first anterior angle γ of the camber line sword place rake face of blade of the present invention ₁Become gradually greatly to point of a knife from the intersection point of straight line sword and camber line sword, make the chip curling that produces in the working angles, the flow direction is effectively controlled, discharge smooth and easyly, cutting force is low, cuts more brisk, vibrate little, improved surface of the work crudy, prolonged blade service life; Described point of a knife place rake face all has only an anterior angle γ 3, has increased the intensity at point of a knife place, has also prolonged the service life of blade; The second back knife face is made up of plane and cambered surface, reduces the difficulty of processing of locating surface, and groove is set on it, has reduced processing capacity again, improves positioning accuracy, reduces vibration; The some near ellipse around boss that is provided with on the end face has increased the blade area of dissipation, helps prolonging blade service life equally.

Description of drawings

Fig. 1 is the schematic perspective view of ball end mill blade of the present invention;

Fig. 2 is the rearview of Fig. 1;

Fig. 3 is that blade shown in Figure 1 is loaded on the schematic perspective view on the knife bar;

Fig. 4 is the front view of Fig. 1;

Fig. 5 is the A-A cutaway view of Fig. 4;

Fig. 6 is the B-B cutaway view of Fig. 4;

Fig. 7 is the C-C cutaway view of Fig. 4.

The specific embodiment

Shown in Fig. 1,2,4-7, the blade of ball end mill of the present invention mainly comprises end face 1, bottom surface 2 and two sides 3, and end face 1 intersects two cutting edges 4 of formation with two sides 3, be made up of straight line sword 4a and camber line sword 4b respectively, two cutting edge 4 intersections form point of a knife 6A, 6B; Cutting edge 4 place rake faces 5 have the first anterior angle γ ₁With the second anterior angle γ ₂Two sides 3 are made up of the major first flank 3a and the second back knife face 3b respectively, and major first flank 3a and rake face 5 join, and the second back knife face 3b and bottom surface 2 join.It is characterized in that: the first anterior angle γ of camber line sword 4b place rake face ₁Become gradually greatly to point of a knife 6A, 6B from the intersection point of straight line sword 4a and camber line sword 4b, its value is 10 °-20 °, the second anterior angle γ ₂Be 15 °-25 ° and γ ₂＞γ ₁Point of a knife 6A or 6B place rake face all have only an anterior angle γ 3, and its value is γ ₃＞20 ° and≤25 °, it is γ that point of a knife 6B place has angle ₄Negative chamfered edge; The second back knife face 3b is made up of plane 3c and cambered surface 3d as locating surface, is respectively arranged with groove 3e, 3f on it.End face 1 is provided with some nearly ellipse around boss 7.

Fig. 3 is that blade shown in Figure 1 is loaded on the schematic perspective view on the knife bar, and knife bar is installed on the handle of a knife, and whole cutter carries out copy milling and curved surface mills processing around axle A rotation.

Because the first anterior angle γ of the camber line sword 4b place rake face of blade of the present invention ₁Become gradually greatly to point of a knife 6A, 6B from the intersection point of straight line sword 4a and camber line sword 4b, make the chip curling that produces in the working angles, the flow direction is effectively controlled, discharge smooth and easyly, cutting force is low, cuts more brisk, vibrate little, improved surface of the work crudy, prolonged blade service life; Point of a knife 6A, 6B place rake face all have only an anterior angle γ 3, have increased the intensity at point of a knife place, have also prolonged the service life of blade; The second back knife face is made up of plane and cambered surface, reduces the difficulty of processing of locating surface, and groove 3e, 3f are set on it, has reduced processing capacity again, improves positioning accuracy, reduces vibration; The some near ellipse around boss 7 that is provided with on the end face 1 has increased the blade area of dissipation, helps prolonging blade service life equally.The whole serviceability excellence of blade of the present invention.

Claims

1. An insert for a ball-nose end mill, mainly comprising a top surface (1), a bottom surface (2) and two side surfaces (3), where the top surface (1) intersects with the two side surfaces (3) to form two The cutting edge (4) is composed of a straight edge (4a) and an arc edge (4b). The intersection of the two cutting edges (4) forms two tool noses (6A, 6B), one of which has a negative Chamfering; the rake face (5) where the cutting edge (4) is located has a first rake angle γ ₁ and a second rake angle γ ₂ ; the two sides (3) are respectively connected by the first rake face (5) The flank face (3a) and the second flank face (3b) connected to the bottom face (2) are composed, and it is characterized in that: the first rake angle γ ₁ of the rake face where the arc edge (4b) is located is from the straight line From the point of intersection of the edge (4a) and the arc edge (4b) to the tip (6A, 6B) gradually becomes larger, and the rake face at the tip (6A, 6B) has only one rake angle γ ₃ ; as a positioning surface The second flank (3b) consists of a plane (3c) and an arc (3d).

2. The insert for a ball end mill according to claim 1, characterized in that: the first rake angle _γ1 is 10°-20°, and the second rake angle _γ2 is 15°-25° , the γ ₂ >γ ₁ ; the tool nose rake angle γ ₃ >20° and ≤25°.

3. The insert for a ball end mill according to claim 1 or 2, characterized in that grooves ( 3e, 3f).

4. The insert for a ball end mill according to claim 1 or 2, characterized in that: the top surface (1) is provided with several nearly elliptical bosses (7).

5. The insert for a ball end mill according to claim 3, characterized in that several nearly elliptical bosses (7) are arranged on the top surface (1).