CN201324866Y

CN201324866Y - Left-hand milling cutter

Info

Publication number: CN201324866Y
Application number: CNU2008202057199U
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 left-hand 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 six clockwise spiral grooves and five anticlockwise spiral grooves to form milling blades; the clockwise spiral grooves and thee anticlockwise spiral grooves form a cutting surface at the terminal of the milling head; the terminal of the milling head is provided with two V-shaped cutting surfaces which form an included angle of 130 plus or minus 2 degrees at the end of the milling head; the included angle between the projection of a clockwise spiral groove and the axial center of the milling cutter, and the included angle between the projection of an anticlockwise spiral groove and the axial center of the milling cutter are both 25 degrees in the diameter direction of the milling cutter; the depth and the width of a left-hand spiral groove are respectively larger than the depth and the width of a right-hand spiral groove, thereby forming a lower chip-removal-type structure; and the rotating speed can reach 30 KRPM. The utility model has the advantages of long service life, smooth processing surface and the like, and can be widely used for the milling of PCB boards, in particular for the processing of the PCB boards after the encapsulation of electronic components through the SMT process.

Description

A kind of left-hand circular polarization

Technical field

The utility model relates to a kind of milling machine cutter, particularly a kind of left-hand circular polarization.

Background technology

In the process of making pcb board, need carry out Milling Process to the pcb board behind the SMT technology dress envelope electronic devices and components, existing milling cutter versatility is stronger, still do not have at present to carry out the milling cutter that Milling Process designs at the pcb board behind the SMT technology dress envelope electronic devices and components specially, pcb board burr after causing processing is many, rough, thus 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 the custom-designed milling cutter of pcb board behind the SMT technology dress envelope electronic devices and components that the utility model provides.

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

A kind of left-hand circular polarization, comprise handle of a knife, one end of handle of a knife extends into milling head, the surface of described milling head is provided with clockwise direction and anticlockwise helical groove forms milling edge, clockwise direction and anticlockwise helical groove form the cutting face at the end of milling head, and the end of milling head is provided with two makes the end of milling head form the cutting face that angle theta is 130 ° ± 2 ° " V " mouth; From milling head, clockwise direction is defined as the right-hand screw groove to what handle of a knife extended, another is defined as the left-hand screw groove, wherein, described right-hand screw groove is provided with six roads, the left-hand screw groove is provided with five roads, and described right-hand screw groove and left-hand screw groove are 25 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center, and the degree of depth of described left-hand screw groove and width form down chip removal formula structure greater than the degree of depth and the width of right-hand screw groove respectively.

The beneficial effects of the utility model are: the surface of the utility model milling head is provided with the anticlockwise helical groove of six road clockwise directions and five roads and forms milling edge, clockwise direction and anticlockwise helical groove form the cutting face at the end of milling head, and the end of milling head is provided with two makes the end of milling head form the cutting face that angle is 130 ° ± 2 ° " V " mouth; Clockwise direction and anticlockwise helical groove are 25 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center, and the degree of depth of left-hand screw groove and width form down chip removal formula structure greater than the degree of depth and the width of right-hand screw groove respectively, its rotating speed can reach 30KRPM, have advantages such as long service life, machined surface be smooth, can be widely used in the milling of pcb board, be specially adapted to the processing of the pcb board behind the SMT technology dress envelope electronic devices and components.

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 length M of right this milling cutter of left-hand circular polarization 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 clockwise direction and anticlockwise helical groove forms milling edge, the end of milling head 2 is provided with two makes the end of milling head 2 form the cutting face 6 that angle theta is 130 ° ± 2 ° " V " mouth, two cutting faces 6 shift to install, and the mispairing distance H between two cutting faces 6 is 0.15mm; From milling head 2, clockwise direction is defined as right-hand screw groove 3 to what handle of a knife 1 extended, another is defined as left-hand screw groove 4, wherein, described right-hand screw groove 3 is provided with six roads, left-hand screw groove 4 is provided with five roads, and described right-hand screw groove 3 is 25 ° with left-hand screw groove 4 along the projection of milling cutter diameter direction and the angle in milling cutter axle center, and the degree of depth of described left-hand screw groove 4 and width form down chip removal formula structure greater than the degree of depth and the width of right-hand screw groove 3 respectively.

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.The utility model structurally forms the chip removal formula, rotating speed can reach 30KRPM, have advantages such as long service life, machined surface be smooth, can be widely used in the milling of pcb board, be specially adapted to the processing of the pcb board behind the SMT technology dress envelope electronic devices and components.

Claims

1, a kind of left-hand circular polarization, comprise handle of a knife (1), one end of handle of a knife (1) extends into milling head (2), the surface that it is characterized in that described milling head (2) is provided with two groups around the opposite helical groove formation milling edge of direction, and the end of milling head (2) is provided with two and forms the cutting face (6) that angle theta are 130 ° ± 2 ° " V " mouth; From milling head (2), clockwise direction is defined as right-hand screw groove (3) to what handle of a knife (1) extended, another is defined as left-hand screw groove (4), wherein, described right-hand screw groove (3) is provided with six roads, left-hand screw groove (4) is provided with five roads, described right-hand screw groove (3) is 25 ° with left-hand screw groove (4) along the projection of milling cutter diameter direction and the angle in milling cutter axle center, and the degree of depth of described left-hand screw groove (4) and width form down chip removal formula structure greater than the degree of depth and the width of right-hand screw groove (3) respectively.

2, a kind of left-hand circular polarization 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, a kind of left-hand circular polarization 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, a kind of left-hand circular polarization 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, a kind of left-hand circular polarization 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).