CN201922094U - Hard alloy end and edge milling cutter - Google Patents

Abstract

The utility model belongs to the field of milling cutters, relates to an end and edge milling cutter for processing multilayer printed circuit boards, and particularly relates to a hard alloy end and edge milling cutter, which comprises a hilt. One end of the hilt extends to form a milling head, left spiral grooves or right spiral grooves are distributed on the surface of the milling head, a plurality of end teeth are formed at one end, which is far away from the hilt, of the milling head, and the height difference between a high portion and a low portion of the tip of each end tooth is smaller than or equal to 0.03mm. The milling cutter applied onto an end and edge chamfering machine guarantees that chamfers at ends and edges are smooth and free of burrs.

Description

Carbide alloy end side mill

Technical field

The utility model belongs to the milling cutter field, is specifically related to a kind of end side mill that is used for multilayer printed wiring board processing.

Background technology

In recent years, continual renovation development along with electronic information field, various electronic products are brought in constant renewal in and are regenerated, and such as LCD TV, commercial mobile phone, digital camera, pocket diary computer etc., more and more present trend highly integrated, diversified, high-intelligentization.The realization of this trend not only relies on the development of electronic devices and components, more depends on the update of printed wiring board.Printed wiring board is divided into two types because of the difference of its application: carry " mother matrix " of semiconductor components and devices and as " support plate " of semiconductor packages.The former manufacturing technology and electric property, reliability and the cost of the complete machine electronic product of being assembled have very big related; The latter's manufacturing technology has very big influence for semi-conductive operation frequency, energy resource consumption, connectivity, reliability and cost.Current, for the requirement of the manufacturing technology of printed wiring board mainly concentrate on densification, high frequencyization, adapt to compound installation, adapt to new function, aspect such as low cost and delivery date are short.Printed wiring board is because its handling characteristics main component is a copper, epoxy resin and glass fabric etc., be and be difficult to material processed, and along with the continuous development of electronics industry is upgraded, there has been growing field to bring into use volume less, the increasing multilayer circuit board of the compound number of plies, thereby in the process of printed wiring board processing cutting, performance parameter to employed cutter requires high, should satisfy the soft metal material machining of copper for example, satisfy again being rich in the cutting of hard non-metallic materials such as glass fibre and resinoid bond, also require the smooth no burr of finished surface, the processing life-span of cutter is long simultaneously, characteristics such as especially chip removal performance is good.Therefore, prepare at it for the milling cutter tool that is applicable to the multilayer printed wiring board milling and all to have proposed high requirement aspect material, the milling parameter, and at the material of the different required milling cutters of preparation, its various performance parameters is otherwise designed thereupon also, in the hope of reaching best milling effect.Milling cutter construction of the prior art and performance have not been suitable for the Milling Process of multilayer printed wiring board.

Chinese patent CN201324867Y discloses a kind of milling cutter, the milling head surface of this milling cutter is provided with two groups around the opposite helical groove formation milling edge of direction, from milling head, clockwise direction is the right-hand screw groove to the handle of a knife extension, counter clockwise direction is the left-hand screw groove to the handle of a knife extension, described right-hand screw groove and described left-hand screw groove are 25 ° along the projection of milling cutter diameter direction and the angle in milling cutter axle center, and described milling cutter is last chip removal structure.This milling cutter is special in the custom-designed milling cutter of the characteristic of FR-4 plate and halogen-free sheet material, and this milling cutter is specially adapted to the processing of the pcb board behind the technology packaging electronic parts.But there is the limitation below this in this milling cutter in the application process of reality: the first, this milling cutter is not done rational Design on Plane to the end tooth number of teeth and end tooth angle, can not guarantee smooth smooth no burr after the chamfering when causing this milling cutter to be useful on the end edge turning chamfering machine; This milling cutter is owing to adopt 25 ° of bigger helical angles in addition, then in process, on the milling face of sheet material, can produce a component that makes progress, when smear metal is upwards discharged, the tendency that sheet material " is started " is arranged, influence the surface quality of working (machining) efficiency and work piece; Because helical angle is bigger, under the certain situation of the milling head diameter of milling cutter, the chip removal performance of milling cutter can not get guaranteeing simultaneously.

The utility model content

For this reason, technical problem to be solved in the utility model is, overcomes the jagged defective of out-of-flatness behind the milling cutter end of the prior art limit, is used on the beveler thereby provide a kind of, can guarantee smooth carrot-free end side mill after the chamfering.

Another technical problem to be solved in the utility model is that it is less to overcome milling cutter ' s helix angle degree of the prior art, influences the defective of work piece surface quality and working (machining) efficiency easily, is easy to process and end side mill that crudy is good thereby provide a kind of.

For solving the problems of the technologies described above a kind of end side mill that is used to process printed wiring board described in the utility model.Comprise handle of a knife, one end of described handle of a knife extends into milling head, the surface distributed of described milling head has left-hand screw groove or right-hand screw groove, wherein, described milling cutter head forms a plurality of end teeth away from an end of described handle of a knife, the high portion of described end tooth point and the difference in height of lower curtate is less than or equal to 0.03mm and greater than 0mm.

A kind of end side mill that is used to process printed wiring board described in the utility model, described end tooth anterior angle is 3-9 °.

A kind of end side mill that is used to process printed wiring board described in the utility model, the helical angle of described left-hand screw groove or right-hand screw groove is 18 °～22 °.

A kind of end side mill that is used to process printed wiring board described in the utility model, the helical angle of described left-hand screw groove or described right-hand screw groove is 20 °.

A kind of end side mill that is used to process printed wiring board described in the utility model, described right-hand screw groove is 18, and described end tooth is 16 teeth, and described milling cutter is a chip removal formula structure in the dextrorotation.

A kind of end side mill that is used to process printed wiring board described in the utility model, described right-hand screw groove is 18, and described end tooth is 16 teeth, and described milling cutter is a chip removal formula structure in the dextrorotation.

A kind of end side mill that is used to process printed wiring board described in the utility model, the length of described milling cutter head is 15-18cm.

The advantage that technique scheme of the present utility model has compared to existing technology is:

1. milling cutter described in the utility model has a plurality of end teeth, the height of end tooth high portion of point and lower curtate

Degree differs and is less than or equal to 0.03mm greater than 0mm, and less end tooth is beated and guaranteed smooth no burr after the chamfering, and the number of teeth of end tooth is more simultaneously, has guaranteed that higher milling cutter has wearability preferably.

2. the end tooth anterior angle of milling cutter described in the utility model is 3-9 °, thereby has guaranteed Cutting Stiffness preferably.

3. milling cutter of the present utility model, the helical angle of left-hand screw groove or right-hand screw groove is set to 18 °～22 ° and is preferably 20 °, than 25 ° of helical angles of the prior art, reduced the design of helical angle, make milling cutter in the process of milling, be not easy to lift sheet material, and under the certain situation of the milling tool bit diameter of milling cutter, the number of teeth is less, holds the bits ability and strengthens.

4. milling cutter described in the utility model adopts 18 helicla flutes, guaranteed to have enough cutting teeths to participate in cutting, improved the efficient of cutting, adopt the end tooth design of 16 teeth simultaneously, the appearance bits performance of milling cutter is also guaranteed to some extent, simultaneously the corresponding one by one continuous transition of chip area of described end tooth and side edge makes the smear metal of end tooth to discharge smoothly.

Description of drawings

For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below

Fig. 1 is the schematic diagram of right-hand cutter of the present utility model;

Fig. 2 is the schematic diagram of end tooth anterior angle of the present utility model.

Reference numeral is expressed as among the figure: 1-handle of a knife, 2-milling head, 3-right-hand screw groove or left-hand screw groove, 5-end tooth, 7-end tooth anterior angle.

The specific embodiment

Embodiment 1

The carbide alloy end side mill of present embodiment, comprise handle of a knife 1, one end of described handle of a knife 1 extends into milling head 2, the sword of described milling cutter head is long to be 15-18mm, be distributed with 18 right-hand screw groove 3(around the described milling cutter 2 and see Fig. 1), form chip removal structure in the dextrorotation, described right-hand screw groove 3 is meant the helicla flute that clockwise direction extends to handle of a knife 1.Described milling head 2 forms 16 end teeth 5 away from an end of described handle of a knife 1, and the end tooth anterior angle 7(of described end tooth 5 sees Fig. 2) be 3-9 °, the high portion of the end tooth point of described end tooth 5 and the difference in height a of lower curtate are 0.03mm.The helical angle of described right-hand screw groove 3 is 18-22 °, is preferably 20 °.

Embodiment 2

The carbide alloy end side mill of present embodiment, comprise handle of a knife 1, one end of described handle of a knife 1 extends into milling head 2, the sword of described milling cutter head is long to be 15-18mm, be distributed with 18 left-hand screw grooves 3 around the described milling cutter 2, form the left-handed described left-hand screw groove 3 of chip removal structure down and be meant the helicla flute that counterclockwise extends to handle of a knife 1.Described milling head 2 forms 16 end teeth 5 away from an end of described handle of a knife 1, and the end tooth anterior angle 7 of described end tooth 5 is 3-9 °, and the high portion of the end tooth point of described end tooth 5 and the difference in height a of lower curtate are 0.01mm.The helical angle of described right-hand screw groove 3 is 18-22 °, is preferably 20 °.

Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.

Claims (7)

1. carbide alloy end side mill, comprise handle of a knife (1), one end of described handle of a knife (1) extends into milling head (2), the surface distributed of described milling head (2) has left-hand screw groove (3) or right-hand screw groove (3), it is characterized in that: described milling head (2) forms a plurality of end teeth (5) away from an end of described handle of a knife (1), and the high portion of described end tooth point and the difference in height of lower curtate are less than or equal to 0.03mm greater than 0mm.

2. carbide alloy end side mill according to claim 1 is characterized in that: end tooth anterior angle (7) is 3-9 °.

3. carbide alloy end side mill according to claim 1 and 2 is characterized in that: the helical angle of described left-hand screw groove (3) or described right-hand screw groove (3) is 18 °～22 °.

4. carbide alloy end side mill according to claim 3 is characterized in that: the helical angle of described left-hand screw groove (3) or described right-hand screw groove (3) is 20 °.

5. carbide alloy end side mill according to claim 4, it is characterized in that: the surface distributed of described milling head (2) has right-hand screw groove (3), described right-hand screw groove (3) is 18, and described end tooth (5) is 16 teeth, and described milling cutter is a chip removal formula structure in the dextrorotation.

6. carbide alloy end side mill according to claim 4, it is characterized in that: the surface distributed of described milling head (2) has left-hand screw groove (3), described left-hand screw groove (3) is 18, and described end tooth (5) is 16 teeth, and described milling cutter is left-handed chip removal formula structure down.

7. carbide alloy end side mill according to claim 1 and 2 is characterized in that: the length of described milling head (2) is 15-18cm.