CN103008743A

CN103008743A - Indexable double-sided milling insert

Info

Publication number: CN103008743A
Application number: CN2012105711814A
Authority: CN
Inventors: 蒋大双
Original assignee: ZHENJIANG NEW DIRSTRICT HENGFENG TOOLS CO Ltd
Current assignee: ZHENJIANG NEW DIRSTRICT HENGFENG TOOLS CO Ltd
Priority date: 2012-12-26
Filing date: 2012-12-26
Publication date: 2013-04-03
Anticipated expiration: 2032-12-26
Also published as: CN103008743B

Abstract

The invention discloses an indexable double-sided milling insert of a regular polygon slice. The indexable double-sided milling insert comprises two regular polygon rake faces which are arranged in parallel and a plurality of side surfaces connected with two regular polygon rake faces. A milling insert datum is arranged in the middle of the side surface is provided with; a flank with a negative rear angle alpha is arranged at the intersection part of each side surface and the two regular polygon rake faces; and the flank is connected with the milling insert datum through a sunken garden cambered flute and the regular polygon rake faces are intersected with a plurality of flanks to form a plurality of cutting edges. The indexable double-sided milling insert is double-sided and provided with eight cutting edges; and when the cutting edges of the milling insert are worn to turn positions, the milling insert datum serves as a positioning reference, and the positioning accuracy of the milling insert is not affected by the wear of the cutting edges, so that the milling precision is high, the milling speed is high, and the feed quantity is large. After the four cutting edges at one side of the milling insert are worn, the four cutting edges at the other side can be used by turning a side, thereby prolonging the service life of the milling insert to lower the processing cost.

Description

Indexable Double Milling blade

Technical field

The present invention relates to a kind of milling cutting insert, especially a kind of Double Milling paring blade for chamfer machining belongs to the metal cutting tool technical field.

Background technology

As shown in Figure 1, the fixturing blade of milling cutter body partly is generally truncated cone structure 10, the cutter hub side face is provided with the cutter hub groove 110 that a plurality of three bread enclose cutter blade, cutter blade is fixed in the cutter hub groove 110, a plurality of cutter blades are radially uniform to be fixed on the truncated cone structure 10 of milling cutter body with staggering vertically, and milling cutter body drives the cutter blade rotation and finishes Milling Process to workpiece.Existing cutter blade only has 2 or 4 cutting edges of indexable use usually, the cutting edge negligible amounts, and along with after 2 or the wearing and tearing of 4 cutting edges, the positioning datum of cutter blade changes, and affects machining accuracy.Cutter blade intensity is lower, and during use, the cutting rotational speeds of cutter blade is 250 rev/mins, and feed is 2.5 m/mins, cutting speed is slower, and feed is less, and operating efficiency is lower, and cutter life is short, every cutting edge can only cut 4 meters length, and utilization rate is lower, has increased processing cost.

Summary of the invention

The purpose of this invention is to provide a kind of intensity height, long service life, high, the two-sided cutter blade that all has the Turable cutting sword of utilization rate.

The present invention is achieved by the following technical programs:

A kind of indexable Double Milling blade, described indexable Double Milling blade is the regular polygon laminated structure, comprise two regular polygon rake faces that be arranged in parallel, the a plurality of sides that connect two regular polygon rake faces, be provided with the cutter blade datum level perpendicular to the regular polygon rake face in the middle of the described side, described cutter blade datum level intersects vertically in twos; Each side and two regular polygon rake face intersections are respectively equipped with the rear knife face that band is born relief angle α, be connected by recessed garden cambered surface chip area between described rear knife face and the cutter blade datum level, after intersecting, regular polygon rake face and a plurality of rear knife face form many cutting edges, described rear knife face is provided with negative relief angle α, the cutting edge intersection arc transition of regular polygon rake face.

Purpose of the present invention can also further realize by following technical measures.

Aforesaid indexable Double Milling blade, the width a of wherein said cutter blade datum level is 1mm～3mm.

Aforesaid indexable Double Milling blade, the degree of depth b of wherein said recessed garden cambered surface chip area is 0.02～0.04 of regular polygon rake face length of side L.

Aforesaid indexable Double Milling blade, wherein said negative relief angle α are 6 °～8 °.

The present invention is the two-sided cutter blade that has eight cutting edges, cutter intensity is high, long service life, locate with the cutter blade datum level in the middle of the cutter blade side during installation, accurately and reliably, when the cutting edge of cutter blade weares and teares rear transposition, still take the cutter blade datum level as positioning datum, the cutter blade positioning accuracy is not subjected to the impact of cutting edge wearing and tearing, and Milling Accuracy is high.Cutting speed of the present invention can reach 400 rev/mins, and feed is 6 m/mins, and Milling Speed is fast, and feed is large, and operating efficiency improves greatly.The length of cut of every cutting edge of cutter blade is brought up to 20 meters from 4 meters of existing cutter blade, four cutting edges that can also turn-over after four cutting edges wearing and tearing of a face of cutter blade re-use the another one face, greatly prolonged the service life of cutter blade, improve the utilization rate of cutter blade, thereby reduced processing cost.

Advantage and disadvantage of the present invention will be for illustration and explanation by the non-limitative illustration of following preferred embodiment, and these embodiment only provide as an example with reference to accompanying drawing.

Description of drawings

Fig. 1 is the stereogram of milling cutter body

Fig. 2 amplification stereogram of the present invention;

Fig. 3 is enlarged front view of the present invention;

Fig. 4 is the left view of Fig. 2.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples.Such as Fig. 1～shown in Figure 4, the present invention mills the square sheet constructed milling cutter sheet of chamfer machining for being used for, and material is carbide alloy, comprises two square rake faces 2 that be arranged in parallel, connects four sides of two square rake faces.Be provided with the cutter blade datum level 1 perpendicular to regular polygon rake face 2 in the middle of the described side, cutter blade datum level 1 intersects vertically in twos, and its width a is 1mm～3mm, and a of present embodiment is 2mm.Cutter blade is inlaid in the cutter hub groove 110 of milling cutter body when interior, and three mutually perpendicular cutter blade datum levels 1 are resisted against respectively on the cutter hub groove 110 three sides surrounded locating surfaces 111; After the cutter blade transposition, still to be resisted against respectively three new mutually perpendicular cutter blade datum levels 1 on the cutter hub groove 110 as positioning datum, positioning accuracy is high, error is little.

Each side and two square rake faces 2 corresponding intersections are respectively equipped with the rear knife face 5 of the negative relief angle α of band, be connected by recessed garden cambered surface chip area 3 between described rear knife face 5 and the cutter blade datum level 1, the degree of depth b of recessed garden cambered surface chip area 3 is respectively 0.02～0.04 of square rake face 2 length of side L, have good chip removal effect, the degree of depth b of the arc side, recessed garden 3 of present embodiment is 0.03 of square rake face 2 length of side L.Square rake face 2 with four after knife face 5 intersect 4, two square rake faces 2 of four cutting edges of formation and have eight cutting edges 4.The cutting edge 4 intersection arc transition of square rake face 2.It is 6 °～8 ° that rear knife face 5 is provided with negative relief angle α, and the α of present embodiment is 6 °, adopts less negative relief angle can increase cutter intensity.

The present invention middle part also is provided with installs through hole 6, and it is the large butterfly stepped hole in middle little two that through hole 6 is installed, can be respectively from the cutter blade two sides with on the fastening cutter hub groove 110 that the present invention is fixed on milling cutter body of trip bolt.After a cutting edge 4 wearing and tearing of the present invention, can will use another cutting edge 4 to proceed Milling Process after its 90 ° of transpositions, after four cutting edges 4 of a square rake face 2 all wear and tear, the present invention can be overturn 180 ° and continue to use four cutting edges 4 of another square rake face 2 to mill chamfer machining.Chamfer machining is milled indexable eight times altogether in two sides of the present invention, after eight cutting edges 4 all wear and tear, can also reuse behind two square rake faces 2 of grinding, greatly reduces use cost.

In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.

Claims

1. indexable Double Milling blade, it is characterized in that: described indexable Double Milling blade is the regular polygon laminated structure, comprise two regular polygon rake faces that be arranged in parallel, the a plurality of sides that connect two regular polygon rake faces, be provided with the cutter blade datum level perpendicular to the regular polygon rake face in the middle of the described side, described cutter blade datum level intersects vertically in twos; Each side and two regular polygon rake face intersections are respectively equipped with the rear knife face that band is born relief angle α, be connected by recessed garden cambered surface chip area between described rear knife face and the cutter blade datum level, after intersecting, regular polygon rake face and a plurality of rear knife face form many cutting edges, described rear knife face is provided with negative relief angle α, the cutting edge intersection arc transition of regular polygon rake face.

2. indexable Double Milling blade as claimed in claim 1, it is characterized in that: the width a of cutter blade datum level is 1mm～3mm.

3. indexable Double Milling blade as claimed in claim 1, it is characterized in that: the degree of depth b of described recessed garden cambered surface chip area is 0.02～0.04 of many regular polygons rake face length of side L.

4. indexable Double Milling blade as claimed in claim 1, it is characterized in that: described negative relief angle α is 6 °～8 °.