CN201324863Y

CN201324863Y - Milling cutter

Info

Publication number: CN201324863Y
Application number: CNU2008202057165U
Authority: CN
Inventors: 黄润昌
Original assignee: ZHONGSHAN DONGHONG TUNGSTEN CARBIDE TOOLS CO Ltd
Current assignee: ZHONGSHAN DONGHONG TUNGSTEN CARBIDE TOOLS CO Ltd
Priority date: 2008-12-22
Filing date: 2008-12-22
Publication date: 2009-10-14
Anticipated expiration: 2018-12-22

Abstract

The utility model discloses a milling cutter, which comprises a cutter handle. One end of the cutter handle extends to form a milling head; the surface of the milling head is provided with two groups of milling blades which are formed by spiral grooves and have the identical surrounding directions but different screw pitches; the end of the milling head is provided with two V-mouthed cutting surfaces which form an included angle of 130 plus or minus 2 degrees; the spiral groove with a larger screw pitch is defined as a first spiral groove; the other spiral groove is defined as a second spiral groove; wherein, the first spiral groove is provided with six channels; the second spiral groove is only provided with one channel; the included angle between the projection of the first spiral groove in the direction of the diameter of the milling cutter and the axial center of the milling cutter is 25 degrees; the included angle between the projection of the second spiral groove in the direction of the diameter of the milling cutter and the axial center of the milling cutter is 81 degrees; and the rotating speed can reach 30KRPM. The utility model has the advantages of long service life, high chip removing capability and smooth processing surface, and can be widely used for the milling of PCB boards, in particular for the processing of paper substrates and CEM-3 boards.

Description

Milling cutter

Technical field

The utility model relates to a kind of milling machine cutter, particularly a kind of milling cutter.

Background technology

Existing milling cutter versatility is stronger, still there is not at present special milling cutter at paper substrate plate and the design of CEM-3 plate Milling Process, because the hardness of paper substrate plate and CEM-3 plate is not high, the bits end of milling is more, adding man-hour often because existing milling cutter chip removal power is not strong, and paper substrate plate after causing processing or CEM-3 burr are many, and working (machining) efficiency is low, can not satisfy the requirement of making the precision circuit plate.

Summary of the invention

In order to overcome the deficiencies in the prior art, it is a kind of at paper substrate plate and the custom-designed milling cutter of CEM-3 plate that the utility model provides.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of milling cutter, comprise handle of a knife, one end of handle of a knife extends into milling head, and that the surface of described milling head is provided with is identical around direction, small one and large one two groups of helical grooves of pitch form milling edges, and the end of milling head is provided with two and forms the cutting face that angle theta are 130 ° ± 2 ° " V " mouthful; The helical groove that described pitch is big is defined as first helical groove, another is defined as second helical groove, wherein, described first helical groove is provided with six roads, second helical groove only is provided with together, described first helical groove is 25 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center, and described second helical groove is 81 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center.

The beneficial effects of the utility model are: the surface of the utility model milling head is provided with small one and large one two groups of helical grooves of, pitch identical around direction and forms milling edges, and the end of milling head is provided with two and forms the cutting face that angle theta are 130 ° ± 2 ° " V " mouthful; Pitch is big is defined as first helical groove, another is defined as second helical groove, wherein, first helical groove is provided with six roads, second helical groove only is provided with together, first helical groove is 25 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center, second helical groove is 81 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center, its rotating speed can reach 30KRPM, have advantages such as long service life, the chip removal ability is strong, machined surface is smooth, can be widely used in the milling of pcb board, be specially adapted to the processing of paper substrate plate and CEM-3 plate.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a milling cutter construction schematic diagram of the present utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the right view of Fig. 1;

Fig. 4 is the diameter of phi and the long L table of comparisons of sword of the utility model milling edge.

The specific embodiment

With reference to Fig. 1, Fig. 2, Fig. 3, a kind of milling cutter, the length M of this milling cutter is 38.20 _-0.2 ^{+ .01}Mm, it comprises handle of a knife 1, the diameter D of handle of a knife 1 is 3.175 _-.0005 ^-0.001Mm, an end of handle of a knife 1 extends into milling head 2, and the other end is arranged to 35 ° ± 2 ° chamfering 5.Adopt 15 ° ± 1 ° taper surface 7 transition between described handle of a knife 1 and the milling head 2, the surface of described milling head 2 is provided with around direction identical, small one and large one two groups of helical grooves of pitch form milling edges, the helical groove that described pitch is big is defined as first helical groove 3, another is defined as second helical groove 4, wherein, described first helical groove 3 is provided with six roads, 4 of second helical grooves are provided with together, described first helical groove 3 is 25 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center, and described second helical groove 4 is 81 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center.The end of milling head 2 is provided with two ends that make milling head 2, and to form angle theta be that 6, two cutting faces 6, cutting face of 130 ° ± 2 ° " V " mouthful shift to install, and the mispairing distance H between two cutting faces 6 is 0.15mm.

The diameter of milling edge of the present utility model can be according to the needs setting of processing, and the table of comparisons of the diameter of phi of milling edge and the long L of sword is with reference to Fig. 4.Milling cutter rotating speed of the present utility model can reach 30KRPM, has advantages such as long service life, the chip removal ability is strong, machined surface is smooth, can be widely used in the milling of pcb board, is specially adapted to the processing of paper substrate plate and CEM-3 plate.

Claims

1, a kind of milling cutter, comprise handle of a knife (1), one end of handle of a knife (1) extends into milling head (2), that the surface that it is characterized in that described milling head (2) is provided with is identical around direction, small one and large one two groups of helical grooves of pitch form milling edges, and the end of described milling head (2) is provided with two and forms the cutting face (6) that angle theta are 130 ° ± 2 ° " V " mouthful; The helical groove that described pitch is big is defined as first helical groove (3), another is defined as second helical groove (4), wherein, described first helical groove (3) is provided with six roads, second helical groove (4) only is provided with together, described first helical groove (3) is 25 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center, and described second helical groove (4) is 81 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center.

2, milling cutter according to claim 1, the length M that it is characterized in that described milling cutter is 38.20 _-0.2 ^{+ .01}Mm, the diameter D of handle of a knife (1) is 3.175 _-.0005 ^-0.001Mm.

3, milling cutter according to claim 1 is characterized in that described two cutting faces (6) shift to install, and the mispairing distance H between two cutting faces (6) is 0.15mm.

4, milling cutter according to claim 1 is characterized in that adopting between described handle of a knife (1) and the milling head (2) 15 ° ± 1 ° taper surface (7) transition.

5, milling cutter according to claim 1 is characterized in that the other end of described handle of a knife (1) is arranged to 35 ° ± 2 ° chamfering (5).