CN203109326U - Milling cutter structure - Google Patents

Abstract

The utility model discloses a milling cutter structure, it contains hilt and cutting edge portion, cutting edge portion's front end forms a terminal surface cutting edge structure, cutting edge portion's surface sets up two spiral grooves, in order to form the spiral side edge of two symmetries, the angle at the spiral inclination of this spiral side edge is between 15 degrees to 60 degrees, an interval has between two spiral side edges, each spiral side edge has a thickness again, wherein the interval is greater than thickness, and the ratio of interval and thickness is greater than or equal to 2, wherein the terminal surface cutting edge structure is a six profile knife face structure or two profile knife face structures. The milling cutter structure has the advantages of increasing the chip removal function of the milling cutter and avoiding the sticking phenomenon in the process of machining and forming.

Description

Milling cutter structure

technical field

The utility model relates to a milling cutter structure, in particular to a milling cutter structure which can avoid the sticking phenomenon in the process of forming.

Background technique

The milling cutter is made of a high-hardness tungsten carbide material. The milling cutter rotates at high speed to mill the workpiece with its blade, and the spiral groove is used to discharge chips.

FIG. 1 shows a conventional milling cutter structure 10 , which has a shank 12 and a blade 14 . The blade portion 14 has more than three grooves 18 arranged around the cylindrical surface of the blade portion 14 , wherein a side edge 16 is formed between every two adjacent grooves 18 . Existing milling cutters usually have 4 or 5 side edges. In the case of a large number of grooves and side edges, the width of the grooves is small. During cutting, the friction between the high-speed rotation of the tool and the workpiece The heat of the chip is not easy to dissipate due to the chip jam, and the small width of the groove will make the chip removal space insufficient and affect the chip removal performance.

In addition, the side edge of the existing milling cutter is relatively wide, and its contact area with the workpiece to be processed is relatively large. Under the high temperature generated by the milling operation, it is easy to cause the side edge to stick to chips, especially when processing soft metals, resulting in Chips are less likely to escape and affect heat dissipation.

Utility model content

In order to solve the above problems, one of the objectives of the utility model is to provide a milling cutter structure that can avoid the sticking phenomenon during the forming process.

One of the objectives of the utility model is to provide a milling cutter structure, which has the advantages of increasing the chip removal function of the milling cutter and improving the processing quality.

In order to achieve the above object, the structure of a milling cutter according to an embodiment of the present invention includes: a handle portion and a blade portion are arranged at one end of the handle portion, the front end of the blade portion forms an end face cutting edge structure, and the outer surface of the blade portion is arranged Two helical grooves, the two helical grooves form two symmetrical helical side edges, the angle of the helical inclination of the helical side edges is between 15 degrees and 60 degrees, there is a distance between the two helical side edges, and each The spiral side edge has a thickness, the pitch is greater than the thickness, and the ratio of the pitch to the thickness is greater than or equal to 2.

In a preferred embodiment, the end face cutting edge structure includes: two main cutter faces, two auxiliary cutter faces and two auxiliary cutter faces, between the two main cutter faces, between the two auxiliary cutter faces and between the two auxiliary cutter faces Each of the axes of the blades is symmetrical and inclined, each of the main blade faces has a belly edge, and the auxiliary blade face is obliquely arranged on a side where the main blade face does not have the belly edge, and the auxiliary blade face It is obliquely arranged between one of the auxiliary cutter faces and the other main cutter face, a tip of the main cutter face is inclined away from the handle, and there is a top inner angle between the two main cutter faces, and the top inner angle is between 120° Between 180° and 180°, the side of the auxiliary cutter face away from the main cutter face is inclined toward the handle of the tool, and the outer peripheral edge of the auxiliary cutter face is inclined toward the handle of the handle.

In a preferred embodiment, the tangent line of the belly edge of each main blade surface at the tip portion and the radial line of the blade portion have a vent angle, and the vent angle is between 0° and 30° Between, the back edge of each main blade face and the rotation tangent of the blade have a diverging angle, and the diverging angle is between 5 degrees and 60 degrees.

In a preferred embodiment, the end face cutting edge structure includes two knife surfaces, and the two knife surfaces are respectively symmetrical and inclined relative to an axis of the knife edge, and a knife tip of each knife surface is away from the handle The direction is inclined, and there is a top interior angle between the two knife faces, and the top interior angle is between 120 degrees and 180 degrees.

In a preferred embodiment, the belly edge of each knife face has a belly angle between the tangent line of the knife tip and the radial line of the knife edge, and the belly angle is between 0° and 30° , the back edge of each blade surface and the rotation tangent of the blade portion have a diverging angle, and the diverging angle is between 5 degrees and 60 degrees.

In a preferred embodiment, the outer surface of the blade portion is coated with a film layer.

In a preferred embodiment, the handle portion and the blade portion are made of tungsten carbide, and the two are integrally formed.

In a preferred embodiment, the handle and the blade are made of tungsten carbide, and the handle and the blade are joined together by welding or adhesive.

In a preferred embodiment, the handle is made of stainless steel, the blade is made of tungsten carbide, and the handle and the blade are joined together by welding or adhesive.

The characteristics and advantages of the milling cutter structure of the utility model are: the helical side blade with a small thickness of the milling cutter structure reduces the contact area between the side blade and the soft metal, so as to avoid sticking phenomenon during the forming process; at the same time, through The wide helical groove increases the space for chip removal to enhance the chip removal performance. Furthermore, the inclination of the auxiliary cutter surface and the auxiliary cutter surface toward the shank of the end face cutting edge structure can increase the chip removal function of the milling cutter, so as to avoid the impact of chip jamming on the processing quality during processing.

Description of drawings

Fig. 1 is a schematic diagram of the existing structure of a milling cutter.

Fig. 2 is a structural schematic diagram of a milling cutter according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the structure of the end face cutting edge of the milling cutter structure according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a milling cutter according to another embodiment of the present invention.

Fig. 5 is a schematic diagram of the structure of the end face cutting edge of the milling cutter structure in another embodiment of the utility model.

Description of component symbols

10 ... Milling cutter structure 12 ... Shank

14 ... blade 16 ... side edge

18 ... ... Groove 20 ... Milling cutter structure

22 ... ... the handle of the knife 24 ... the blade

26 ...Face cutting edge structure 28, 28' ...Spiral groove

30, 30’ ...Screw side edge L ...Space

I ...thickness θ ₁ ...helix inclination

32, 32’……Main knife face 321, 321’……The side of the knife belly

322, 322'... the tip of the knife 323, 323'... the back of the knife

34, 34’……Auxiliary knife face 341, 341’……Outer peripheral edge

36, 36'...Auxiliary knife surface 361, 361'...Outer peripheral edge

O ……Axis center θ ₂ ……Apex interior angle

θ ₃ ……ventral departure angle θ ₄ ……deviation angle

38, 38'... Knife face 381, 381'... Knife tip

382, 382'... the belly of the knife 383, 383'... the back of the knife

Detailed ways

Fig. 2 is a structural schematic diagram of a milling cutter according to an embodiment of the present invention. In this embodiment, as shown in Figure 2, the milling cutter structure 20 includes a handle portion 22, and a blade portion 24 is arranged on one end of the handle portion 22, and the front end of the blade portion 24 forms an end face cutting edge structure 26, the blade portion The outer surface of part 24 is provided with helical groove 28, helical groove 28 ' by blade part 24 front end to handle part 22 direction, to form two symmetrical helical side edge 30, helical side edge 30 ', helical side edge 30, helical There is a distance L between the side edges 30 ′, and each helical side edge 30 and helical side edge 30 ′ has a thickness I, wherein the distance L is greater than the thickness I, and the ratio of the distance L to the thickness I is greater than or equal to 2.

It can be understood that the distance L between the helical side edge 30 and the helical side edge 30' is the width of each helical groove 28 and helical groove 28', and the thickness I of the helical side edge 30 and the helical side edge 30' means The distance between the two opposite side walls of each helical side edge 30, helical side edge 30', that is, in the utility model, because the thickness I of the helical side edge 30, the helical side edge 30' is very small, when using this milling When the knife structure 20 is processed into a soft metal, the contact area between the helical side edge 30, the helical side edge 30' and the soft metal can be reduced, so as to avoid sticking during the forming process; moreover, because the helical groove 28 1. Enlarging the width of the spiral groove 28' can increase the space for chip removal to enhance chip removal performance and avoid chip jamming. In addition, the helical inclination angle _θ1 of the above-mentioned helical side edge 30 and helical side edge 30' is between 15 degrees and 60 degrees, and preferably 30 degrees.

Wherein, a coating layer (not shown) can be coated on the outer surface of the blade portion 24, and its material is a metal compound, a carbon compound or a mixture of the above components, and preferably titanium nitride (TiN ), titanium aluminum nitride (TiAlN), diamond coating (Diamond Coating) or diamond like coating (Diamond like Coating). Furthermore, the shank portion 22 and the blade portion 24 can be integrally formed with a tungsten carbide rod, or the handle portion 22 of the tungsten carbide material and the blade portion 24 of the tungsten carbide material can be welded by welding or adhesives. Connecting together, or connecting the handle portion 22 made of stainless steel and the blade portion 24 made of tungsten carbide by means of welding or adhesive. .

Continuing the above description, in the above embodiment, please refer to FIG. 2 and FIG. 3 at the same time. The end face cutting edge structure 26 is a six-sided knife surface structure, which includes a main knife surface 32, a main knife surface 32', and a secondary knife surface 34. , the auxiliary knife surface 34' and the auxiliary knife surface 36, the auxiliary knife surface 36', the main knife surface 32, the main knife surface 32', the auxiliary knife surface 34, the auxiliary knife surface 34' and the auxiliary knife surface 36, the auxiliary knife surface 36 ′ is symmetrical and inclined relative to the axis O of the blade portion 24 . The main knife surface 32 and the main knife surface 32' each have a knife belly 321 and a knife belly 321', and the auxiliary knife surface 34 and the auxiliary knife surface 34' are respectively obliquely arranged on the main knife surface 32. On one side of the knife belly 321 ′, each auxiliary knife surface 36 , 36 ′ is obliquely disposed between the auxiliary knife surface 34 , 34 ′ and the other main knife surface 32 ′, main knife surface 32 . Among them, the knife tip 322 and the knife tip 322' of the main knife surface 32 and the main knife surface 32' are respectively inclined to the direction away from the handle 22 so that there is a top interior angle θ ₂ between the main knife surface 32 and the main knife surface 32', and the auxiliary knife surface 34. The outer peripheral edge 341 and the outer peripheral edge 341' of the auxiliary cutter surface 34' are inclined towards the handle portion 22 respectively, and the outer peripheral edge 361 and the outer peripheral edge 361' of the auxiliary cutter surface 36 and the auxiliary cutter surface 36' are also inclined toward the handle portion 22. The direction is inclined, and the inclination of the auxiliary knife surface 36 and the auxiliary knife surface 36 ′ towards the handle 22 is steeper than the inclination of the auxiliary knife surface 34 and the auxiliary knife surface 34 ′, so as to pass through the auxiliary knife surface 34 and the auxiliary knife surface 34 'and the design of the auxiliary cutter surface 36 and the auxiliary cutter surface 36' increases the chip removal function of the milling cutter structure 20.

Wherein, the top inner angle θ ₂ formed by the main knife surface 32 and the main knife surface 32' is between 120 degrees and 180 degrees, and the knife belly edge 321 and the knife belly edge 321 ' of each main knife surface 32 and the main knife surface 32' are in the The tangent line of the tip 322, the tip 322' and the radial line of the blade 24 have a ventral angle θ ₃ (marked only on the main blade face 32, the main blade face 32' is the same), and the range of the ventral angle θ ₃ is between between 0 degrees and 30 degrees, and preferably 5 degrees; each main blade surface 32, the knife back edge 323 of the main knife surface 32', the rotation tangent line between the knife back edge 323' and the blade portion 24 has a departure angle θ ₄ (only marked on the main blade surface 32, which is the same as the main blade surface 32'), the deviation angle _θ4 ranges from 5 degrees to 60 degrees, and is preferably 30 degrees.

In another embodiment, as shown in FIG. 4 and FIG. 5 , the end face cutting edge structure 26 is a double-sided knife face structure, which includes a knife face 38 and a knife face 38 ′, and the knife face 38 and the knife face 38 ′ are opposite to each other. An axis O of the blade portion 24 is respectively symmetrical and deflected, wherein each blade face 38, a blade tip portion 381 of the blade face 38 ′, and a blade tip portion 381 ′ are respectively inclined away from the handle portion 22, so that the blade face 38, There is a top internal angle θ ₂ between the knife faces 38 ′, and the top internal angle θ ₂ is between 120° and 180°. And each knife face 38, the knife belly edge 382 of knife face 38 ', the knife belly edge 382 ' have a belly angle θ ₃ ( It is only marked on the main blade face 38, which is the same as the main blade face 38'), the range of the ventral angle _θ3 is between 0 degrees and 30 degrees, and the preferred one is 5 degrees, the back of each blade face 38 and blade face 38' The side 383, the knife back side 383' and the rotational tangent of the blade 24 have a deviation angle θ ₄ (only marked on the main blade surface 38, the main blade surface 38' is the same), and the range of the deviation angle θ ₄ is between 5 degrees and 60 degrees , and preferably 30 degrees.

In the utility model, the contact area between the side edge and the soft metal is reduced through the helical side edge with a small thickness of the milling cutter structure, so as to avoid the phenomenon of sticking during the forming process; at the same time, through the helical groove with a large width Grooves increase chip space for enhanced chip evacuation. Furthermore, the inclination of the auxiliary cutter surface and the auxiliary cutter surface toward the shank of the end face cutting edge structure can increase the chip removal function of the milling cutter, so as to avoid the impact of chip jamming on the processing quality during processing.

The above-described embodiments are only to illustrate the technical ideas and characteristics of the present utility model, and its purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly, and should not limit the scope of the present utility model with this , that is, all equivalent changes or modifications made according to the spirit disclosed in the utility model should still be covered within the scope of the claims of the utility model.

Claims (9)

1. A milling cutter structure, characterized in that, comprising: a handle, and A blade portion is arranged at one end of the handle portion, and the front end of the blade portion forms an end face cutting edge structure, and the outer surface of the blade portion is provided with two helical grooves, and the two helical grooves form two symmetrical helical side edges, The angle of the helical inclination of the helical side cutting is between 15 degrees and 60 degrees, there is a distance between the two helical side cuttings, each of the helical side cuttings has a thickness, the distance is greater than the thickness, the distance and the thickness ratio is greater than or equal to 2. 2. The milling cutter structure according to claim 1, wherein the end face cutting edge structure comprises: two main cutter faces, two auxiliary cutter faces and two auxiliary cutter faces, between the two main cutter faces, the two auxiliary cutter faces Between and between the two auxiliary cutter faces are respectively symmetrical and inclined relative to an axis of the blade portion, each of the main cutter faces has a belly edge, and the auxiliary cutter faces are obliquely arranged on a main cutter face that does not have the knife On one side of the belly, the auxiliary knife surface is inclined between one of the auxiliary knife surfaces and the other main knife surface, a tip of the main knife surface is inclined away from the handle, and there is a A top inner angle, the top inner angle is between 120 degrees and 180 degrees, the side of the auxiliary knife surface away from the main knife surface is inclined towards the handle of the knife, and the outer peripheral edge of the auxiliary knife surface is inclined towards the handle of the knife . 3. The milling cutter structure according to claim 2, characterized in that, the tangent line of the knife belly of each main cutter face at the knife tip and the radial line of the knife edge have a belly angle, and the belly The departure angle is between 0° and 30°, and the back edge of each main blade surface has a departure angle from the rotation tangent of the blade, and the departure angle is between 5° and 60°. 4. The milling cutter structure according to claim 1, wherein the end face cutting edge structure comprises two knife faces, and the two knife faces are respectively symmetrical and inclined relative to an axis of the cutting edge portion, and each of the knife faces A tip of the knife is inclined away from the handle of the knife, and there is a top inner angle between the two knife faces, and the top inner angle is between 120 degrees and 180 degrees. 5. The milling cutter structure as claimed in claim 4, characterized in that, the tangent line of the knife edge of each knife face at the knife tip and the radial line of the knife edge have a belly angle, and the belly distance The angle is between 0° and 30°, and the back edge of each blade surface has a deviation angle from the rotation tangent of the blade portion, and the deviation angle is between 5° and 60°. 6 . The milling cutter structure according to claim 1 , wherein an outer surface of the cutting edge is covered with a film layer. 7 . 7 . The milling cutter structure according to claim 1 , wherein the material of the shank portion and the blade portion is tungsten carbide, and the two are integrally formed. 8 . 8 . The milling cutter structure according to claim 1 , wherein the material of the shank and the blade is tungsten carbide, and the shank and the blade are joined together by welding or adhesive. 9. The milling cutter structure as claimed in claim 1, wherein the material of the handle portion is stainless steel, the material of the blade portion is tungsten carbide, and the handle portion and the blade portion are joined by welding or adhesive Together.

Images