CN208116862U - A kind of eight blade milling cutters - Google Patents

Abstract

The utility model relates to a kind of eight blade milling cutters, including：Knife handle section, linkage section and segment of cutting have eight spiral helicine lands and eight spiral helicine chip spaces on linkage section, and eight lands and eight chip spaces are spaced, and segment of cutting all includes with eight blades, blade：First cutting face, the second cutting face, lead-in chamfered and guiding groove, first cutting face is connect with the second cutting face, lead-in chamfered is between the second cutting face and guiding groove, first cutting face and the second cutting face are all connect with land, guiding groove is connect with chip space, the cutting edge inclination of the cutting edge inclination in the first cutting face less than the second cutting face.Not only cutting precision height and stock-removing efficiency are high for above-mentioned screw cutter, but also cut smooth, long service life.

Description

A kind of eight blade milling cutters

Technical field

The utility model relates to a kind of milling cutters, more particularly, to a kind of eight blade milling cutters.

Background technique

Milling cutter is for machining, the rotary cutter with one or more cutters tooth.When work each cutter tooth successively between Cut the surplus of workpiece with having a rest.Milling cutter is mainly used for processing plane, step, groove, forming surface and cutting workpiece on milling machine Deng.

Traditional screw cutter is usually two sword screw cutters (two sword of one kind as disclosed in Chinese patent CN103586523 Aluminium round nose milling cutter) or be a kind of four sword screw cutters (not equal swords round nose vertical milling as disclosed in Chinese patent CN203140859 Knife).But either two blade milling cutters or four blade milling cutters are all unable to satisfy the cutting that precision is higher and higher and speed is getting faster and add Work requirement.

Chinese patent CN204657596 discloses a kind of indexable circular thread milling cutter, and the cutter tooth of the milling cutter is evolute, Cutter hub installs eight indexable insert tip, throw away tips, blade it is easy to adjust, do not have to toolsetting, to knife, can effectively save economic cost.

However, the blade of above-mentioned screw cutter is relatively thin, service life is very short, although people can pass through the side of more allowing blade replacement Formula continues to use, but considerably increases in this way using screw cutter cost.In addition, two sword of clastic ratio that eight sword screw cutters generate It is all more with four swords, above-mentioned screw cutter be easy to appear in use can not chip removal and cause to cut unsmooth situation.

Utility model content

The utility model provides a kind of eight blade milling cutters to solve the above-mentioned problems, and the milling cutter includes：Knife handle section, connection Section and segment of cutting, the knife handle section, the linkage section and the segment of cutting are sequentially connected, and have eight spirals on the linkage section The land of shape and eight spiral helicine chip spaces, eight lands and eight chip spaces are spaced, and the segment of cutting has eight Blade, the blade all include：First cutting face, the second cutting face, lead-in chamfered and guiding groove, first cutting face and institute The connection of the second cutting face is stated, the lead-in chamfered is between second cutting face and the guiding groove, first cutting Face and the second cutting face are all connect with land, and the guiding groove is connect with the chip space, the cutting edge inclination in first cutting face Less than the cutting edge inclination in second cutting face.

Preferably, the top of the land is spur angle, and the spur angle is aligned with second cutting face.

Preferably, the bottom of the chip space is recessed wedge angle, and the recessed wedge angle is aligned with the chip space.

Preferably, the outside in first cutting face has the first fillet, and the outside in second cutting face has second Fillet.

Preferably, the radius of curvature of first fillet and second fillet is all 0.2mm-0.3mm.

Preferably, the helical angle of the guiding groove is 25 ° -35 °, and the helical angle of the chip space is 25 ° -35 °.

Preferably, the maximum width of the land is a quarter of the maximum width of the chip space.

Preferably, the cutting edge inclination in first cutting face is 0.5 ° -1 °, the cutting edge inclination in second cutting face is 1 ° - 2°。

The beneficial effects of the utility model are：

1, by eight blades of setting, the cutting precision and efficiency of milling cutter can be greatly improved.Wherein, due to the first cutting face Cutting edge inclination less than the cutting edge inclination in the second cutting face, therefore milling cutter is during the cutting process, can first pass through the first cutting face and carry out just Step cutting, then secondary cutting is carried out by the second cutting face, make product final molding, on the one hand improves the efficiency of cutting, it is another Aspect reduces the resistance of cutting.

2, since the first cutting face and the second cutting face are all connect with land, the first cutting face and second can be enhanced and cut The intensity of bevel extends the service life of milling cutter.

3, it since milling cutter is equipped with lead-in chamfered, guiding groove and chip space, is cut in the first cutting face and the second cutting face The clast generated during cutting can finally be discharged outside milling cutter along lead-in chamfered, guiding groove and chip space, to avoid cutting Cut unsmooth situation.

Detailed description of the invention

Fig. 1 is the side view for the milling cutter that the utility model first embodiment is related to；

Fig. 2 is the main view for the milling cutter that the utility model first embodiment is related to；

Fig. 3 is the side view for the milling cutter that the utility model second embodiment is related to.

Specific embodiment

It is emphasized that term " first ", " second ", " third " in the utility model are used for description purposes only, and It cannot be understood as indicating or implying relative importance or implicitly indicate the quantity of indicated technical characteristic.It defines as a result, " first ", " second ", " third " feature can explicitly or implicitly include at least one of the features.The utility model is retouched In stating, the meaning of " plurality " is at least two, such as two, three etc., unless otherwise specifically defined.The utility model In embodiment the directional instruction (such as up, down, left, right, before and after ...) of institute be only used for explanation a certain particular pose (such as Shown in attached drawing) under relative positional relationship, motion conditions etc. between each component should if the particular pose changes Directionality instruction also correspondingly changes correspondingly.In addition, term " includes " and " having " and their any deformations, it is intended that cover It covers and non-exclusive includes.Such as it contains the process, method, system, product or equipment of a series of steps or units and does not limit In listed step or unit, but optionally further comprising the step of not listing or unit, or optionally further comprising for The intrinsic other step or units of these process, methods, product or equipment.

The utility model is further elaborated with reference to the accompanying drawing：

【Embodiment one】

As depicted in figs. 1 and 2, milling cutter is round nose milling cutter in the present embodiment, and milling cutter includes：Knife handle section 1,2 and of linkage section Segment of cutting 3.Knife handle section 1, linkage section 2 and segment of cutting 3 are sequentially connected, and knife handle section 1, linkage section 2 and segment of cutting 3 are all substantially cylindrical Shape.It is assumed that an a central axes A and basal plane S, central axes A is vertical with basal plane S, and the shaft of milling cutter is located on the A of central axes.

There are eight spiral helicine lands 21 and eight spiral helicine chip spaces 22, eight lands 21 and eight on linkage section 2 A chip space 22 is spaced and is uniformly covered with linkage section 2.Segment of cutting 3 has eight blades, and eight blades are circumferentially uniformly arranged Column, each blade include：First cutting face 31, the second cutting face 32, lead-in chamfered 33 and guiding groove 34, the first cutting face 31 It is connect with the second cutting face 32, lead-in chamfered 33 is between the second cutting face 32 and guiding groove 34.First cutting face 31 and Two cutting faces 32 are all connect with land 21, and guiding groove 34 is connect with chip space 22.The cutting edge inclination in the first cutting face 31 is less than second The cutting edge inclination in cutting face 32, cutting edge inclination refer to the angle in the first cutting face 31 or the second cutting face 32 place plane and basal plane S.

By the way that eight blades are arranged, the cutting precision and efficiency of milling cutter can be greatly improved.Wherein, due to the first cutting face 31 Cutting edge inclination less than the cutting edge inclination in the second cutting face 32, therefore milling cutter is during the cutting process, can first pass through the first cutting face 31 into The preliminary cutting of row, then secondary cutting is carried out by the second cutting face 32, make product final molding, on the one hand improves the effect of cutting On the other hand rate reduces the resistance of cutting.

Wherein, since the first cutting face 31 and the second cutting face 32 are all connect with land 21, the first cutting can be enhanced The intensity in face 31 and the second cutting face 32, extends the service life of milling cutter.

Wherein, since milling cutter is equipped with lead-in chamfered 33, guiding groove 34 and chip space 22, in the first cutting face 31 and the The clast that two cutting faces 32 generate during cutting can be along the finally discharge milling of lead-in chamfered 33, guiding groove 34 and chip space 22 Outside knife, to avoid cutting unsmooth situation.

As a preferred solution, the top of land 21 is spur angle 210, and spur angle 210 and the second cutting face 32 are right Together.Spur angle 210 can improve the stock-removing efficiency in the second cutting face 32, and eliminate the knife mark of screw-on cutter generation, improve finish.

As a kind of preferred scheme, the bottom of chip space 22 is recessed wedge angle 220, and recessed wedge angle 220 and chip space 22 are right Together.Recessed wedge angle 220 can play suction-operated to clast, and clast is prevented to be back to segment of cutting 3.

As a preferred solution, the outside in the first cutting face 31 has the first fillet 310, the second cutting face 32 it is outer Side has the second fillet 320.First fillet 310 and the second fillet 320 can prevent blade during the cutting process due to excessively sharp And the case where leading to tipping.Specifically, the radius of curvature of the first fillet 310 and the second fillet 320 is all 0.2mm-0.3mm, excellent It is selected as 0.2mm.

Specifically, the pitch angle alpha of guiding groove 34 is 25 ° -35 °, preferably 30 °, the helixangleβ of chip space 22 is 25 ° - 35 °, preferably 30 °.Helical angle refers to the angle between screw thread and central axes A that guiding groove 34 or chip space 22 are formed.It is above-mentioned Angular range can guarantee that milling cutter has enough chip removal speed, and not will cause clast again and be sputtered onto farther away place.

More specifically, the maximum width W1 of land 21 is a quarter of the maximum width W2 of chip space 22.Above-mentioned setting It is further ensured that the chip removal speed of milling cutter.

Specifically, the cutting edge inclination in the first cutting face 31 is 0.5 ° -1 °, and preferably 0.5 °, the sword in the second cutting face 32 inclines Angle is 1 ° -2 °, preferably 1 °.Above-mentioned angular range can guarantee that the resistance for preventing blade from bearing while stock-removing efficiency is excessive.

【Embodiment two】

In the present embodiment, similar with embodiment one, milling cutter includes：Knife handle section 1', linkage section 2' and segment of cutting 3'.Knife handle Section 1', linkage section 2' and segment of cutting 3' are sequentially connected, and have eight spiral helicine land 21' and eight helical forms on linkage section 2' Chip space 22', eight land 21' and eight chip space 22' it is spaced and be uniformly covered with linkage section 2'.Segment of cutting 3' has Eight blades, eight blades are circumferentially evenly distributed, and each blade includes：First cutting face 31 ', is drawn at the second cutting face 32 ' Guiding incline 33 ' and guiding groove 34 ', the first cutting face 31' are connect with the second cutting face 32', and lead-in chamfered 33' is located at the second cutting Between face 32' and guiding groove 34.First cutting face 31' and the second cutting face 32' are connect with land 21', guiding groove 34 and row Consider slot 22' connection to be worth doing.Cutting edge inclination of the cutting edge inclination of first cutting face 31' less than the second cutting face 32'.

What is different from the first embodiment is that the milling cutter of the present embodiment is rose cutter, for cutting various curved surfaces, circular arc ditch Slot, and it can process some narrow sunk areas.

Embodiment described above, only the preferred embodiments of the utility model, are not the implementation model to limit the utility model It encloses, therefore all equivalent change or modifications done according to structure, feature and principle described in present utility model application the scope of the patents, it should all It is included in the scope of the utility model patent application.

Claims (10)

1. a kind of eight blade milling cutters, the milling cutter include：Knife handle section, linkage section and segment of cutting, the knife handle section, the linkage section and The segment of cutting is sequentially connected, which is characterized in that spiral helicine with eight spiral helicine lands and eight on the linkage section Chip space, eight lands and eight chip spaces are spaced, and the segment of cutting has eight blades, and the blade all includes：The One cutting face, the second cutting face, lead-in chamfered and guiding groove, first cutting face is connect with second cutting face, described Lead-in chamfered between second cutting face and the guiding groove, first cutting face and second cutting face all with Land connection, the guiding groove are connect with the chip space, and the cutting edge inclination in first cutting face is less than second cutting face Cutting edge inclination.

2. eight blade milling cutter as described in claim 1, which is characterized in that the top of the land is spur angle, the spur angle It is aligned with second cutting face.

3. eight blade milling cutter as claimed in claim 2, which is characterized in that the bottom of the chip space is recessed wedge angle, the recessed point Angle is aligned with the chip space.

4. eight blade milling cutter as described in claim 1, which is characterized in that the outside in first cutting face has the first fillet, The outside in second cutting face has the second fillet.

5. eight blade milling cutter as claimed in claim 4, which is characterized in that the curvature of first fillet and second fillet half Diameter is all 0.2mm-0.3mm.

6. eight blade milling cutter as described in claim 1, which is characterized in that the helical angle of the guiding groove is 25 ° -35 °, the row The helical angle for considering slot to be worth doing is 25 ° -35 °.

7. eight blade milling cutter as claimed in claim 6, which is characterized in that the maximum width of the land be the chip space most The a quarter of big width.

8. eight blade milling cutter as described in claim 1, which is characterized in that the cutting edge inclination in first cutting face is 0.5 ° -1 °, institute The cutting edge inclination for stating the second cutting face is 1 ° -2 °.

9. eight blade milling cutter a method as claimed in any one of claims 1-8, which is characterized in that the milling cutter is round nose screw cutter.

10. eight blade milling cutter a method as claimed in any one of claims 1-8, which is characterized in that the milling cutter is bulb screw cutter.