CN215090918U

CN215090918U - Milling cutter

Info

Publication number: CN215090918U
Application number: CN202121340234.2U
Authority: CN
Inventors: 邓胜一; 侯兴钢; 朱学明; 熊轶民
Original assignee: Ruisheng Precision Machinery Shenzhen Co ltd
Current assignee: Ruisheng Precision Machinery Shenzhen Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-12-10
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a milling cutter, which comprises a cutter handle part and a milling cutter part, wherein the cutter handle part is provided with a handle part and a neck part connected with the handle part, and the diameter of the neck part is smaller than that of the handle part; the milling cutter part includes the connecting rod and sets up at least one cutting edge in the connecting rod periphery, the diameter of connecting rod with the diameter of neck equals and connects on the neck, the cutting edge includes week sword, week sword includes chip groove and rake face, be equipped with the chip groove on the connecting rod, the chip groove with the chip groove links to each other, the contained angle of rake face and the central axis of connecting rod is 15 ~ 40, the cutting edge is in the length direction's of connecting rod cross-section is side T shape structure, T shape structure includes first cutting portion and second cutting portion, first cutting portion is on a parallel with the central axis of connecting rod, the second cutting portion is connected between first cutting portion and the connecting rod.

Description

Milling cutter

Technical Field

The utility model relates to a milling cutter tool technical field especially relates to a milling cutter.

Background

With the progress of science and technology and the development demand of precision machining technology, various precision machining processes are more and more widely applied, and the machining quality of the groove on the part is also one of important indexes of the whole structure of the part, such as a sealing groove and the like.

The existing boring cutter or T-shaped milling cutter can only realize the processing of a flat opening or an open groove, and cannot process a groove structure similar to a stepped groove on the inner side of the groove.

SUMMERY OF THE UTILITY MODEL

The utility model provides a milling cutter can process the groove structure in similar ladder groove through first cutting portion and second cutting portion in the recess, has also ensured groove structure's precision and axiality simultaneously.

The utility model provides a milling cutter, include:

a shank portion having a shank portion and a neck portion connected to the shank portion, the neck portion having a diameter less than a diameter of the shank portion;

the milling cutter part comprises a connecting rod and at least one cutting edge arranged on the periphery of the connecting rod, the diameter of the connecting rod is equal to that of the neck and is connected to the neck, the cutting edge is provided with a chip groove and a rake face, the connecting rod is provided with a chip groove, the chip groove is connected with the chip groove, and an included angle between the cutting edge of the rake face and the central axis of the connecting rod is 15-40 degrees;

the cross section of the cutting edge in the length direction of the connecting rod is of a side T-shaped structure, the T-shaped structure comprises a first cutting part and a second cutting part, the first cutting part is parallel to the central axis of the connecting rod, and the second cutting part is connected between the first cutting part and the connecting rod, so that the cutting edge can process an annular groove with the shape matched with that of the cutting edge on a part.

The utility model discloses an among the milling cutter of embodiment, the quantity of cutting edge is four, four the cutting edge encircles the central axis and the interval setting of connecting rod.

In an embodiment of the present invention, the outer diameter D3 of the milling cutter portion is equal to the outer diameter D2 of the annular groove.

In an embodiment of the present invention, the outer diameter D4 of the connecting rod is smaller than or equal to the inner diameter D1 of the annular groove.

In an embodiment of the milling cutter according to the present invention, a height L4 of the first cutting portion is less than or equal to a height L2 of the annular groove.

In an embodiment of the present invention, the handle portion further includes a conical portion disposed in a conical shape, and the handle portion passes through the conical portion and the neck portion.

The utility model discloses an among the milling cutter of embodiment, circular cone portion through excessive circular arc with the neck is connected, the radius of excessive circular arc is 1 ~ 5 mm.

In an embodiment of the present invention, a distance L3 from a portion of the first cutting portion, which is away from the shank portion, to a connection portion of the neck portion and the conical portion is greater than a distance L1 from the annular groove to an end surface of the part.

In an embodiment of the present invention, an angle B between an outer end surface of the conical portion and a central axis of the connecting rod ranges from 15 ° to 45 °.

The utility model discloses an among the milling cutter of embodiment, the rake face has the first normal relief angle and the second normal relief angle of perpendicular to blade, the scope of first normal relief angle is 8 ~ 16, the scope of second normal relief angle is 20 ~ 30.

The technical scheme provided by the embodiment of the application can have the following beneficial effects: the application has designed a milling cutter structure, because the cutting edge is side T shape structure at the cross-section of the length direction of connecting rod, this T shape structure includes first cutting portion and second cutting portion for the cutting edge can be followed a recess of part radial direction elder generation, and the back is along the recess structure of part axial direction processing similar ladder groove in the inboard of recess, has not only practiced thrift a large amount of manufacturing procedure, has also ensured recess structure's precision and axiality moreover.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic structural view of a milling cutter structure provided by an embodiment of the present application during machining of a part;

FIG. 2 is a schematic structural view of the part of FIG. 1;

FIG. 3 is a schematic view of the milling cutter configuration of FIG. 1 at one of the angles;

FIG. 4 is a schematic view of the milling cutter structure of FIG. 1 at another angle;

FIG. 5 is a schematic view of the milling cutter structure of FIG. 1 at another angle;

FIG. 6 is a schematic view of the milling cutter structure of FIG. 1 at another angle;

FIG. 7 is a schematic view of the milling cutter structure of FIG. 1 at another angle;

fig. 8 is a schematic view of the milling cutter structure of fig. 1 at another angle.

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 some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

As shown in fig. 1 to 8, the present application provides a milling cutter structure 100, which includes a milling cutter portion 20 and a shank portion 10, wherein the shank portion 10 is configured to cooperate with a fixture on a machine tool, so that the machine tool can drive the milling cutter portion 20 connected to the shank portion 10 to machine a part 200.

Wherein the shank portion 10 has a shank portion 11 and a neck portion 12 connected to the shank portion 11, the diameter of the neck portion 12 being smaller than the diameter of the shank portion 11.

In the present embodiment, the milling cutter portion 20 includes a connecting bar 22 and at least one cutting edge 21 provided on an outer periphery of the connecting bar 22, and the connecting bar 33 has a diameter equal to that of the neck portion 12 and is connected to the neck portion 12. The cutting edge 21 is provided with a chip groove 213 and a rake face, a connected chip groove 121 is arranged on the connecting rod 22 and the handle portion 10 near the connecting rod 22, the chip groove 121 is connected with the chip groove 213, and the included angle beta between the cutting edge of the rake face and the central axis of the connecting rod is 15-40 degrees.

In an alternative embodiment, the cutting edge 21 has a side T-shaped cross section in the length direction of the connecting rod 22, and the T-shaped cross section includes a first cutting portion 212 and a second cutting portion 211, the first cutting portion 212 is substantially parallel to the central axis of the connecting rod 22, and the second cutting portion 211 is connected between the first cutting portion 212 and the connecting rod 22, so that the cutting edge 21 can machine an annular groove with a shape matched with that of the cutting edge 21 on the part 200, and the annular groove is similar to a groove structure of a stepped groove, and the precision and the coaxiality of the groove structure are ensured.

After the above technical solution is adopted, the chip groove 213 is spiral, so that the cutting edge 21 is spiral, and the sharpness of the cutting edge 21 is improved. In the machining process, the milling cutter structure 100 is driven by a machine tool to rotate at a high speed and firstly machines a groove 201 along the radial direction of the part 200, then the cutting edge 21 machines a groove structure similar to a stepped groove on the inner side of the groove 201 along the axial direction of the part 200, and the groove structure comprises an upper groove 203 and a lower groove 204, so that a large number of machining processes of the part 200 are saved, and the precision and the coaxiality after machining are ensured.

In an alternative embodiment, the number of cutting edges 21 is four, and four cutting edges 21 are spaced around the central axis of the connecting bar 22. Wherein, the connecting rod 22 can be connected with the shank portion 10 in an assembling manner, and the connecting rod 22 can also be integrally formed with the shank portion 10, which is beneficial to improving the strength of the milling cutter portion 20 itself.

In an alternative embodiment, the outer diameter D3 of the milling cutter portion 20 is equal to the outer diameter D2 of an annular groove, wherein the annular groove is composed of the groove 201 and a groove structure, i.e. the maximum outer diameter of the milling cutter portion 20 is equal to the maximum outer diameter of the groove 201, to ensure the accuracy of the groove 201.

In an alternative embodiment, the outer diameter D4 of the connecting rod 22 is smaller than or equal to the inner diameter D1 of the annular groove, so that the connecting rod 22 can move in the annular groove, the part 200 has been formed with a through groove 204 communicating with both ends of the part 200 before the groove 201 is machined, the axis of the through groove 204 coincides with the axis of the annular groove, i.e. when the milling cutter portion 20 is in the annular groove, the outer diameter D4 of the connecting rod 22 is smaller than or equal to the inner diameter D1 of the through groove 204.

In an alternative embodiment, the height L4 of first cutting portion 212 is less than or equal to the height L2 of the annular groove, so that first cutting portion 212 can exit from groove 201, i.e., when milling cutter portion 20 enters part 200 to form groove 201, the height L2 of groove 201 is equal to the height L4 of first cutting portion 212, and when milling cutter portion 20 is coaxial with through groove 204, milling cutter portion 20 moves up and down part 200 to form upper groove 203 and lower groove 204, where the height L2 of groove 201 is necessarily greater than or equal to the height L4 of first cutting portion 212; when the milling cutter portion 20 needs to be withdrawn, the milling cutter portion 20 is moved to the middle of the groove 201, and the first cutting portion 212 is prevented from colliding at the time of withdrawal, so that the life of the milling cutter portion 20 is ensured.

In an alternative embodiment, the shank portion 10 further comprises a conically arranged conical portion 13, and the shank portion 11 is connected to the neck portion 12 by the conical portion 13, so that the diameter of the shank portion 11 can be gradually reduced toward the neck portion 12 by the conical portion 13.

In an alternative embodiment, the conical part 13 is connected with the neck part 12 through a transition circular arc 14, wherein the radius R1 of the transition circular arc is 1-5 mm, so that the stress concentration at the connection part of the conical part 13 and the neck part 12 can be reduced, the rigidity is enhanced, and the broken rate is reduced.

In an alternative embodiment, the distance L3 from the end of the first cutting portion 212 remote from the shank portion 10 to the junction of the neck portion 12 and the conical portion 13 is greater than the distance L1 from the annular groove to the end face of the part.

In an alternative embodiment, the angle α between the outer end surface of the conical portion 13 and the central axis of the connecting rod 22 ranges from 15 ° to 45 °.

In an alternative embodiment, the rake face has a first and a second normal relief angle perpendicular to the edge, wherein the first normal relief angle ranges from 8 ° to 16 ° to ensure sharpness of the cutting edge 21; the secondary normal clearance angle ranges from 20 to 30 so that greater thrust can be tolerated. After the technical scheme is adopted, the cutting performance of the milling cutter part 20 can be improved, and the phenomenon of cutter breakage is avoided.

In an alternative embodiment, the first cutting portion 212 is provided with a rounded structure at opposite ends, and the shank portion 11 is provided with a chamfer at an end remote from the neck portion 12.

After the technical scheme is adopted, the milling cutter structure 100 is driven by a machine tool, the milling cutter structure 100 rotates at a high speed and feeds transversely to cut into the part 200, after the milling cutter structure 100 cuts an arc-shaped groove 201, the milling cutter structure 100 stops feeding transversely, wherein the arc-shaped radius of the groove 201 is equal to the maximum radius of the milling cutter structure 100. The rear milling cutter structure 100 is then fed down in the longitudinal direction of the part 200 to form the lower side groove 204, the rear milling cutter structure 100 is then fed up in the longitudinal direction of the part 200 to form the upper side groove 203, and finally the milling cutter structure 100 is moved longitudinally to the position at which it was cut in, and the part 200 is withdrawn to complete the machining.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A milling cutter, comprising:

2. The milling cutter according to claim 1, wherein the number of the cutting edges is four, four of the cutting edges being spaced around a central axis of the connecting rod.

3. The milling cutter according to claim 1, wherein an outer diameter D3 of the milling cutter portion is equal to an outer diameter D2 of the annular groove.

4. The milling cutter according to claim 1, wherein an outer diameter D4 of the connecting rod is less than or equal to an inner diameter D1 of the annular groove.

5. The milling cutter according to claim 1, wherein a height L4 of the first cutting portion is less than or equal to a height L2 of the annular groove.

6. The milling cutter according to claim 1, wherein the shank portion further comprises a conically arranged conical portion, the shank portion being connected to the neck portion by the conical portion.

7. The milling cutter according to claim 6, wherein the conical portion is connected to the neck portion by a transition arc having a radius of 1-5 mm.

8. The milling cutter according to claim 6, wherein a distance L3 from an end of the first cutting portion remote from the shank portion to a junction of the neck portion and the conical portion is greater than a distance L1 from the annular groove to an end surface of the part.

9. The milling cutter according to claim 6, wherein an angle B between an outer end surface of the conical portion and a central axis of the connecting rod is in a range of 15 ° to 45 °.

10. The milling cutter according to claim 1, wherein the rake face has a first normal clearance angle and a second normal clearance angle perpendicular to the edge, the first normal clearance angle ranging from 8 ° to 16 °, and the second normal clearance angle ranging from 20 ° to 30 °.