CN211804054U

CN211804054U - Milling cutter

Info

Publication number: CN211804054U
Application number: CN201922419454.3U
Authority: CN
Inventors: 岳国汉
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-10-30
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses a milling cutter, a cutter handle, wherein, a mounting groove is arranged on the end face of one end of the cutter handle; the cutter head is arranged in the mounting groove; the cutter head comprises a blade and a supporting seat, the blade is arranged in the mounting groove and is provided with a first cutting surface, and the first cutting surface protrudes out of the notch of the mounting groove and is arranged in the direction of the tangent of the rotation direction of the milling cutter and used for cutting a workpiece; the supporting seat is arranged in the mounting groove and is supported on one side of the blade in an abutting mode, and at least part of the first cutting surface is exposed out of the supporting seat. The utility model discloses aim at improving the anti bending ability of tool bit to increase milling cutter's life.

Description

Milling cutter

Technical Field

The utility model relates to a milling cutter cutting technical field, in particular to milling cutter.

Background

The milling cutter comprises a cutter handle and a cutter head, wherein the cutter head is connected to the cutter handle and used for machining a workpiece. Because the existing cutter head is mostly made of superhard materials (such as polycrystalline diamond, cubic boron nitride and the like), the superhard materials have high rigidity and thermal stability, but have poor toughness and bending deformation strength, and the cutter head is contacted with a workpiece for a long time in the high-speed running and cutting process of the milling cutter to process the workpiece, so that the problem of cutter head fracture is easily caused, and the service life of the milling cutter is short.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a milling cutter aims at improving the anti bending ability of tool bit to increase milling cutter's life.

In order to achieve the above object, the utility model provides a milling cutter, include:

the tool comprises a tool handle, wherein an installation groove is formed in the end face of one end of the tool handle;

the cutter head is arranged in the mounting groove;

the cutter head comprises a blade and a supporting seat, the blade is arranged in the mounting groove and is provided with a first cutting surface, and the first cutting surface protrudes out of the notch of the mounting groove and is arranged in the direction of the tangent of the rotation direction of the milling cutter and used for cutting a workpiece; the supporting seat is arranged in the mounting groove and is supported on one side of the blade in an abutting mode, and at least part of the first cutting surface is exposed out of the supporting seat.

Optionally, the blade includes installation department and cutting part, the installation department install in the mounting groove, the cutting part connect in the installation department deviates from one side of mounting groove diapire, first cutting surface form in the lateral wall of cutting part.

Optionally, the supporting seat includes base and support column, the pedestal mounting in the mounting groove, and with the installation department laminating sets up, the one end of support column connect in the base deviates from one side of mounting groove diapire, the other end is along deviating from the direction of mounting groove extends the setting, the lateral wall of cutting portion still is formed with supports and holds the face, support hold the face with the cutting face is followed the circumference of cutting portion is arranged, the support column butt in support holding the face, first cutting face at least part by the support column shows.

Optionally, a first avoiding surface is formed on a side wall of the support pillar, the first avoiding surface is connected to the first cutting surface and forms a first chip groove, and the first cutting surface is exposed by the first avoiding surface.

Optionally, the first cutting surface and the first avoidance surface form an included angle, and the included angle between the first cutting surface and the first avoidance surface is defined as α, so that the following condition is satisfied: alpha is more than or equal to 45 degrees and less than or equal to 90 degrees.

Optionally, the mounting groove includes a diapire and two lateral walls that set up relatively, the bottom surface butt of base in the diapire, the base deviate from one side of installation department laminate in one of mounting groove the lateral wall, the deviation of installation department one side of base laminate in another of mounting groove the lateral wall.

Optionally, the cutting portion side wall is formed with a second cutting surface, the second cutting surface and the first cutting surface are arranged in the circumferential direction of the cutting portion at an interval, the second cutting surface extends along the circumferential direction of the cutting portion, and the second cutting surface is arranged facing the tangential direction of the rotation direction of the milling cutter and at least partially exposed to the outside.

Optionally, the side wall of the cutting part is formed with a second avoiding surface, the second avoiding surface is connected to the second cutting surface, the second cutting surface is exposed by the second avoiding surface, and the second avoiding surface and the second cutting surface form a second chip discharge groove.

Optionally, the length of the cutting portion in the axial direction of the milling cutter is 1.5mm to 6 mm.

Optionally, the tool handle is of a columnar structure, and the diameter of the tool handle is 2mm-10 mm; and/or the blade is a cutting piece made of superhard material, and the supporting seat is a structural piece made of tungsten steel.

The utility model discloses technical scheme's milling cutter includes the handle of a knife and connects in the tool bit of handle of a knife, and the handle of a knife is used for fixing with the lathe, and the mounting groove that is used for installing the tool bit is offered to the one end terminal surface of handle of a knife, and the tool bit includes blade and supporting seat, and the blade is installed in the mounting groove to be equipped with first cutting face, first cutting face protrusion outside the mounting groove, and towards the tangential direction of milling cutter's direction of rotation sets up for the processing work piece. The supporting seat is installed in the mounting groove for support the blade, specifically, the supporting seat butt in the blade, and first cutting face is at least partly by the supporting seat expose, need dodge first cutting face setting when supporting seat butt blade promptly, avoid the supporting seat to shelter from first cutting face, and influence the cutting work of first cutting face. Through setting up the supporting seat, make the blade butt in the supporting seat, when milling cutter high-speed operation, the work piece can give the tool bit a reaction force when the tool bit cuts the work piece, and at this moment, the supporting seat can give a holding power of blade, and holding power and reaction force counterbalance mutually, make the blade be difficult for collapsing by the reaction force of work piece in the cutting process to reach the purpose that increases milling cutter's life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of the milling cutter of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is another view of FIG. 1;

FIG. 4 is a schematic view of the construction of the tool bit portion of FIG. 1;

FIG. 5 is another view of FIG. 4;

fig. 6 is a schematic view of the structure of the blade in fig. 5.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Milling cutter	1213	Second avoidance surface
110	Knife handle	1214	First chip groove
				111	Mounting groove	1215	Second chip groove
1111	Bottom wall	122	Mounting part
				1112	Side wall	130	Supporting seat
120	Blade	131	Support column
				121	Cutting part	1311	First avoidance surface
1211	First cutting noodles	132	Base seat
				1212	Second cutting surface	1216	Propping surface

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a milling cutter.

As shown in fig. 1 to 6, in the embodiment of the present invention, the milling cutter 100 includes:

the tool holder comprises a tool holder 110, wherein a mounting groove 111 is formed in the end face of one end of the tool holder 110;

a cutter head mounted to the mounting groove 111;

the cutter head comprises an insert 120 and a support seat 130, the insert 120 is mounted in the mounting groove 111 and is provided with a first cutting surface 1211, and the first cutting surface 1211 protrudes out of the notch of the mounting groove 111 and faces to the tangential direction of the rotation direction of the milling cutter and is used for cutting a workpiece; the supporting seat 130 is installed in the mounting groove 111 and is abutted against and supported by one side of the blade 120, and the first cutting surface 1211 is at least partially exposed from the supporting seat 130.

Handle of a knife 110 is rectangular columnar structure, and the diameter of handle of a knife 110 is reduced gradually to the one end that is close to blade 120 by the one end of keeping away from blade 120, and blade 120 is connected in the less one end of handle of a knife 110 diameter, and the one end that handle of a knife 110 is close to blade 120 is the installation end, and the installation end is the inclined plane structure setting, can provide bigger cutter relieving space when the inclined plane sets up the cutting, avoids handle of a knife 110 and work piece contact, causes the work piece to damage. The mounting groove 111 is disposed at one end of the mounting segment facing the blade 120, the mounting groove 111 is composed of a bottom wall 1111 and two pairs of side walls 1112, the two pairs of side walls 1112 are connected to the bottom wall 1111 and extend toward one side of the blade 120, and the two pairs of side walls 1112 are not connected to each other, that is, the mounting groove 111 is a slot with an opening at the upper end and the side walls 1112. The blade 120 is inserted into the slot, that is, installed in the mounting groove 111, and the blade 120 has a cutting surface, which is exposed outside the mounting groove 111 because the cutting surface needs to cut the workpiece. Specifically, the first cutting surface 1211 is disposed to extend away from the bottom wall 1111 of the mounting groove 111, i.e., the cutting surface is disposed above the mounting groove.

A support seat 130 is also installed in the mounting groove 111 for supporting the blade 120. Specifically, when blade 120 cuts the work piece and adds man-hour, the work piece can be given a reaction force of blade 120, and when reaction force was greater than the cutting force of blade 120, blade 120 just can break, the utility model discloses a set up supporting seat 130, with supporting seat 130 and blade 120 butt, support seat 130 plays supporting role to blade 120 during, and when the work piece applyed reaction force to blade 120 promptly, the supporting force of supporting seat 130 can counterbalance with reaction force, makes reaction force reduce or offset, makes blade 120 keep a cutting force to work piece one side all the time to this both can avoid blade 120 to be broken and can reach the effect of reinforcing blade 120's cutting strength again. The first cutting surface 1211 protrudes from the notch of the mounting groove 111, and it can be understood that the first cutting surface 1211 is in the same vertical direction as the mounting groove 111, and it can also be understood that the first cutting surface 1211 is disposed at an included angle with the mounting groove 111, as long as the cutting operation of the first cutting surface 1211 can be realized.

The utility model discloses technical scheme's milling cutter includes the handle of a knife and connects in the tool bit of handle of a knife, and the handle of a knife is used for fixing with the lathe, and the mounting groove 111 that is used for installing the tool bit is offered to the one end terminal surface of handle of a knife, and the tool bit includes blade 120 and supporting seat 130, and blade 120 installs in mounting groove 111 to be equipped with first cutting surface 1211, first cutting surface 1211 protrusion outside mounting groove 111, and towards the tangential direction of milling cutter's direction of rotation sets up for the processing work piece. The supporting seat 130 is installed in the mounting groove 111 for supporting the insert 120, specifically, the supporting seat 130 abuts against the insert 120, and at least a portion of the first cutting surface 1211 is exposed from the supporting seat 130, that is, the supporting seat 130 abuts against the insert 120 and needs to be disposed away from the first cutting surface 1211 at the same time, so as to prevent the supporting seat 130 from shielding the first cutting surface 1211 and affecting the cutting operation of the first cutting surface 1211. By providing the supporting seat 130, the blade 120 abuts against the supporting seat 130, when the milling cutter operates at a high speed, the cutter head cuts the workpiece and the workpiece provides a reaction force to the cutter head, at this time, the supporting seat 130 provides a supporting force to the blade 120, the supporting force and the reaction force counter each other, so that the blade 120 is not easily broken by the reaction force of the workpiece in the cutting process, and the purpose of prolonging the service life of the milling cutter is achieved.

Optionally, as shown in fig. 4 to 6, the blade 120 includes a mounting portion 122 and a cutting portion 121, the mounting portion 122 is mounted in the mounting groove 111, the cutting portion 121 is connected to a side of the mounting portion 122 departing from a bottom wall 1111 of the mounting groove 111, and the first cutting surface 1211 is formed on a side wall 1112 of the cutting portion 121.

The installation department 122 is installed in mounting groove 111 to with mounting groove 111 diapire 1111 and inner wall connection, cutting portion 121 is the columnar structure, and the one end of cutting portion 121 is connected in the one side that installation department 122 deviates from mounting groove 111 diapire 1111, and the other end is along deviating from the setting of the extension of mounting groove 111 direction. The mounting portion 122 mainly serves to fix the cutting insert 120 in contact with a workpiece and to machine the workpiece. The cutting portion 121 has a first cutting surface 1211, and the first cutting surface 1211 is disposed as an inclined surface and partially exposed from the supporting base 130. One of the first cutting surfaces 1211 remote from the center of the cutting part 121 has a cutting edge exposed from the support seat 130 for cutting a workpiece.

Optionally, the supporting seat 130 includes a base 132 and a supporting pillar 131, the base 132 is installed in the mounting groove 111, and with the installation portion 122 is attached to the setting, one end of the supporting pillar 131 is connected to the base 132 deviates from one side of the bottom wall 1111 of the mounting groove 111, the other end extends and sets along the direction deviating from the mounting groove 111, the sidewall 1112 of the cutting portion 121 is further formed with a supporting surface, the supporting surface and the cutting surface are arranged along the circumference of the cutting portion 121, the supporting pillar 131 abuts on the supporting surface 1216, and at least a part of the first cutting surface 1211 is exposed by the supporting pillar 131.

Supporting seat 130 is used for supporting blade 120, and specific supporting seat 130 includes mount pad and support column 131, and the mount pad is installed in mounting groove 111 to with the laminating setting of installation department 122, the one end of support column 131 is connected in one side that base 132 deviates from mounting groove 111 diapire 1111, and the other end is along deviating from the direction extension setting of resettlement groove. The cutting portion 121 is further provided with a supporting surface 1216, and the supporting pillar 131 is abutted against the supporting surface, it can be understood that the supporting surface is disposed to be away from the first cutting surface 1211, and the first cutting surface 1211 is at least partially exposed from the supporting pillar 131 for processing the workpiece. The first cutting surface 1211 is a slope surface and has a cutting portion 121 extending inward from an outer surface thereof. The abutting surface 1216 and the first cutting surface 1211 may be disposed in parallel, or disposed at an interval, and are mainly used for abutting against the supporting pillar 131, so that the supporting pillar 131 can support the blade 120.

Optionally, the side wall 1112 of the support pillar 131 is formed with a first avoiding surface 1311, the first avoiding surface 1311 is connected to the first cutting surface 1211 and forms a first chip groove 1214, and the first cutting surface 1211 is exposed by the first avoiding surface 1311.

It is understood that the avoiding surface is provided for avoiding the workpiece, the workpiece is in contact with the cutting surface during machining, and the first avoiding surface 1311 of the supporting column 131 is provided opposite to the first cutting surface 1211 of the cutting part 121, i.e., the first avoiding surface 1311 is provided opposite to the facing direction of the first cutting surface 1211. The milling cutter processes a workpiece through continuous rotation, the avoiding surface can reserve a certain adjusting space for the workpiece and has a chip breaking function, when chips are too long, the avoiding surface is in contact with the chips to break the chips, a first chip discharging groove 1214 is formed between the first avoiding surface 1311 and the first cutting surface 1211, and the first chip discharging groove 1214 can play a role in storing the chips, breaking the chips and discharging the chips.

Optionally, the first cutting surface 1211 and the first avoiding surface 1311 form an included angle, and the included angle between the first cutting surface 1211 and the first avoiding surface 1311 is defined as α, so that the condition is satisfied: alpha is more than or equal to 45 degrees and less than or equal to 90 degrees.

Specifically, a connecting surface is further provided between the first cutting surface 1211 and the first avoiding surface 1311, the connecting surface is provided between the support column 131 and the cutting part 121 and is used for connecting the connecting surface to the first cutting surface 1211 and the first avoiding surface 1311, that is, the first cutting surface 1211, the connecting surface and the first avoiding surface 1311 form a first chip groove 1214, so that an included angle is formed between the first cutting surface 1211 and the first avoiding surface 1311 relative to the extending direction. The first avoiding surface 1311 is disposed on the supporting column 131, and the supporting column 131 abuts against the abutting surface of the cutting portion 121, so the first avoiding surface 1311 and the abutting surface are disposed in a staggered manner, and since the first cutting surface 1211 is a bevel structure and is disposed opposite to the first avoiding surface 1311 and forms an included angle, the first avoiding surface 1311 is also disposed in a bevel structure, that is, the first chip discharging groove 1214 is composed of two bevels. The chip groove extends along the radial direction of the tool shank 110, namely the chip groove has a certain length, so that not only can chips be conveniently discharged, but also a certain amount of chips can be accommodated. Specifically, the included angle between the first avoiding surface 1311 and the first cutting surface 1211 ranges from 45 ° to 90 °, the first avoiding surface 1311 can play a role in guiding chips, if the included angle between the first avoiding surface 1311 and the first cutting surface 1211 is too large, the chips are not easily broken, the chip breaking effect is affected, and if the included angle between the first avoiding surface 1311 and the first cutting surface 1211 is too small, the chips are squeezed in the chip removal groove, and a good chip removal and abdicating effect cannot be achieved.

Optionally, the mounting groove 111 includes a bottom wall 1111 and two opposite side walls 1112, the bottom surface of the base 132 abuts against the bottom wall 1111, one side of the base 132 departing from the mounting portion 122 is attached to one side wall 1112 of the mounting groove 111, and one side of the mounting portion 122 departing from the base 132 is attached to the other side wall 1112 of the mounting groove 111.

The mounting groove 111 is composed of a bottom wall 1111 and two pairs of two opposite side walls 1112, the two opposite side walls 1112 are connected to the bottom wall 1111 and extend toward one side of the blade 120, and the two opposite side walls 1112 are not connected, that is, the mounting groove 111 is a slot with an opening at the upper end and the side walls 1112. The mounting portion 122 and the base 132 are inserted into the card slot and mounted in the mounting groove 111, the mounting portion 122 and the base 132 are attached to each other, one side of the base 132, which is away from the mounting portion 122, is attached to one side wall 1112 of the mounting groove 111, and one side of the mounting portion 122, which is away from the base 132, is attached to the other side wall 1112 of the mounting groove. The cutting portion 121 and the supporting seat 130 are both extended in a direction away from the mounting groove 111, and the cutting portion 121 has a cutting surface which is exposed outside the mounting groove 111 because the cutting surface needs to cut a workpiece. In particular, the cutting surface extends away from the bottom wall 1111 of the mounting groove 111, i.e. the first cutting surface 1211 is arranged above the slot opening of the mounting groove.

Optionally, the side wall 1112 of the cutting portion 121 is formed with a second cutting surface 1212, the second cutting surface 1212 and the first cutting surface 1211 are disposed at an interval in the circumferential direction of the cutting portion 121, the second cutting surface 1212 extends along the circumferential direction of the cutting portion 121, and the second cutting surface 1212 faces the tangential direction of the rotation direction of the milling cutter and is at least partially exposed to the outside.

The second cutting surface 1212 is disposed in a circumferential direction of the cutting portion 121, and has an outer wall surface of the cutting portion 121 extending inward, the second cutting surface 1212 and the first cutting surface 1211 are disposed at an interval, and meanwhile, the second cutting surface 1212 is disposed facing a tangential direction of a rotation direction of the milling cutter and at least partially exposed to the outside. The second cutting surface 1212 is exposed at least partially to the outside for the purpose of contacting with a workpiece, and it is understood that the second cutting surface 1212 is also used for machining the workpiece, and the design of the second cutting surface 1212 increases the cutting strength of the milling cutter during cutting, and the first cutting surface 1211 and the second cutting surface 1212 can continuously cut the workpiece during rotation of the milling cutter, thereby increasing the cutting efficiency.

Optionally, the side wall 1112 of the cutting portion 121 is formed with a second avoiding surface 1213, the second avoiding surface 1213 is connected to the second cutting surface 1212, the second cutting surface 1212 is exposed by the second avoiding surface 1213, and the second avoiding surface 1213 and the second cutting surface 1212 form a second chip flute 1215.

The second avoiding surface 1213 is disposed on the cutting portion 121 and extends along the circumferential direction of the cutting portion 121, the second avoiding surface 1213 is opposite to the second cutting surface 1212 along the extending direction of the cutting portion 121, and the distance between the second avoiding surface 1213 and the second cutting surface 1212 gradually increases along the radial direction of the tool holder, so that the second cutting surface 1212 and the second avoiding surface 1213 form a second chip groove 1215, and the provision of the plurality of chip grooves on the cutting portion 121 can enhance the chip discharge efficiency and prevent the chip accumulation from damaging the workpiece and the blade 120.

Optionally, the cutting portion 121 has a length in the axial direction of the milling cutter of 1.5mm to 6 mm.

The cutting portion 121 carries a plurality of cutting surfaces and relief surfaces, the cutting portion 121 is configured to abut against a workpiece to process the workpiece, and the cutting surfaces extend in the longitudinal direction of the cutting portion 121, so that the cutting portion 121 is provided with a certain length, and the contact surface between the cutting surfaces and the workpiece, that is, the cutting effect of the cutting portion 121 can be increased. However, the cutting portion 121 should not be too long to be pressed against the workpiece, so that the milling cutter cannot rotate, which will affect the cutting effect, and therefore, the length of the cutting portion 121 is preferably between 1.5mm and 6 mm.

Optionally, the tool handle is of a columnar structure, and the diameter of the tool handle is 2mm-10 mm; and/or the blade 120 is a cutting member made of a superhard material, and the support seat 130 is a structural member made of tungsten steel.

The blade 120 is mounted at one end of the shank in order to ensure stability of the mounting of the blade 120, i.e. the diameter of the blade 120 is influenced by the diameter of the shank. The handle of a knife sets up to column structure, and the stability of blade 120 can be strengthened to rectangular structure promptly, and at the same time, the area of contact of first cutting knife face and work piece increases, and the work piece of processing at the same time promptly increases. The outer diameter of the shank 110 is limited to 2mm to 10mm, that is, the diameter of the insert 120, i.e., the number and width of the cutting and relief surfaces, is limited to ensure the machining accuracy. Specifically, the tool holder is made of tungsten carbide (WC) material, the tool bit is made of superhard composite material, the superhard material is specifically polycrystalline diamond (PCD), Polycrystalline Cubic Boron Nitride (PCBN), tungsten carbide, Cubic Boron Nitride (CBN) and the like, specifically, the tool bit is mainly made of PCD and tungsten steel, the blade 120 is made of PCD material, and the support seat 130 is made of tungsten steel. The shank and the head are connected by brazing to form a milling cutter which can be used in a lathe or a boring machine, and the insert 120 and the support 130 are machined on the head by electro-machining.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A milling cutter, comprising:

the cutter head is arranged in the mounting groove;

2. The milling cutter according to claim 1, wherein the insert includes a mounting portion mounted in the mounting pocket and a cutting portion connected to a side of the mounting portion facing away from the bottom wall of the mounting pocket, the first cutting surface being formed in a side wall of the cutting portion.

3. The milling cutter according to claim 2, wherein the support seat includes a base and a support pillar, the base is mounted in the mounting groove and is attached to the mounting portion, one end of the support pillar is connected to a side of the base facing away from the bottom wall of the mounting groove, the other end of the support pillar extends in a direction facing away from the mounting groove, a supporting surface is further formed on a side wall of the cutting portion, the supporting surface and the first cutting surface are arranged along the circumferential direction of the cutting portion, the support pillar abuts against the supporting surface, and at least a part of the first cutting surface is exposed by the support pillar.

4. The milling cutter according to claim 3, wherein the side wall of the support post is formed with a first relief surface connected to the first cutting surface and forming a first flute, the first cutting surface being revealed by the first relief surface.

5. The milling cutter according to claim 4, wherein the first cutting surface and the first relief surface are disposed at an included angle, the included angle between the first cutting surface and the first relief surface being defined as α, the condition being satisfied: alpha is more than or equal to 45 degrees and less than or equal to 90 degrees.

6. The milling cutter according to claim 3, wherein the mounting recess includes a bottom wall and two oppositely disposed side walls, the bottom surface of the base abutting against the bottom wall, one side of the base facing away from the mounting portion abutting against one of the side walls of the mounting recess, and one side of the mounting portion facing away from the base abutting against the other of the side walls of the mounting recess.

7. The milling cutter according to claim 2, wherein the cutting portion side wall is formed with a second cutting surface provided in a circumferential direction of the cutting portion at a distance from the first cutting surface, the second cutting surface extending in the circumferential direction of the cutting portion, the second cutting surface being provided facing a tangential direction of a rotational direction of the milling cutter and being at least partially exposed to the outside.

8. The milling cutter according to claim 7, wherein the cutting portion side wall is formed with a second relief surface connected to the second cutting surface, the second cutting surface is exposed by the second relief surface, and the second relief surface and the second cutting surface form a second flute.

9. The milling cutter according to claim 2, wherein the cutting portion has a length in the axial direction of the milling cutter of 1.5mm to 6 mm.

10. The milling cutter according to any one of claims 1 to 9, wherein the shank is of cylindrical configuration and has a diameter of 2mm to 10 mm;

and/or the blade is a cutting piece made of superhard material, and the supporting seat is a structural part made of tungsten steel.