CN216729749U

CN216729749U - End milling cutter

Info

Publication number: CN216729749U
Application number: CN202220253586.2U
Authority: CN
Inventors: 盆广富; 冯凯; 何思道; 李明亮
Original assignee: Shangming Hengfeng Jilin Precision Tools Co ltd
Current assignee: Shangming Hengfeng Jilin Precision Tools Co ltd
Priority date: 2022-02-08
Filing date: 2022-02-08
Publication date: 2022-06-14
Anticipated expiration: 2032-02-08

Abstract

The utility model discloses an end milling cutter which is mainly technically characterized in that: the annular array sets up the straight chip groove that has gamma angle opening on stalk portion, working portion and the concave part, straight chip groove on the working portion divides into the blade holder with the working portion, all be equipped with the cutting edge on the preceding terminal surface of blade holder and the blade holder, the cutting edge on the preceding terminal surface of blade holder is parallel with the cutting plane, the knife face that the cutting edge on the preceding terminal surface of blade holder was located with the cutting plane is alpha angle and lays. The cutter face where the cutting edge on the front end face of the cutter holder is arranged at an alpha angle with the cutting plane, so that heat generated during cutting can be dissipated conveniently. The milling of the straight chip grooves is beneficial to the integral rigidity and strength of the holding part, the working part and the groove part, the phenomenon of 'tipping' or 'cutting' is overcome, and the full core part is not limited to the control of three cutting elements. The cutting edge on the tool apron can give consideration to the processing of the workpiece with the horizontal end surface and the vertical surface in the workpiece.

Description

End milling cutter

Technical Field

The utility model relates to a milling cutter, in particular to an end milling cutter.

Background

End mills are used for milling flat surfaces, keyways, T-slots, etc. of parts, the more common types being GB/T6117.1 straight shank end mills, GB/T1112 straight shank keyway mills. The common technical characteristics of the GB/T6117.1 straight shank end mill and the GB/T1112 straight shank keyway mill are as follows: the working part is provided with a spiral chip groove, and the edge line of the spiral chip groove is provided with a cutting edge for cutting, so that the structure is well known to the technical personnel in the field, and when the workpiece is milled, the workpiece must be processed according to the specified machine tool rotating speed, cutting depth and feeding amount. Compared with the twist drill, the straight shank end milling cutter and the straight shank key slot milling cutter have the advantages that the edge line of the spiral chip groove on the twist drill is provided with the cutting edge which is used for cutting, and the cutting edge is completely covered and in the hole during drilling, so that the phenomenon of 'tipping' or 'cutting' cannot be easily caused by the cutting edge of the twist drill. For the straight shank end milling cutter and the straight shank keyway milling cutter, the edge zone at the sideline of the spiral chip grooves of the straight shank end milling cutter and the straight shank keyway milling cutter is in line contact with a workpiece, so that the phenomenon of 'tipping' or 'cutting' can occur when the three cutting elements are not well controlled.

For the GB/T6124.1 straight shank T-shaped slot milling cutter, the defects are that the number of cutter teeth is large, no spiral groove discharges chips, the heat dissipation effect of cutting heat generated by milling is poor, and the cutter teeth are rapidly worn due to the existence of cutting heat during continuous milling.

Disclosure of Invention

The object of the present invention is to overcome the disadvantages of the above-mentioned technical problems and to provide a new end mill.

In order to overcome the technical problems, the utility model adopts the technical scheme that:

including the stalk portion, with the work portion that the stalk portion is connected and locate the concave part between stalk portion and the work portion, its characterized in that: still include that annular array sets up the straight chip groove that has gamma angle open-ended on stalk portion, working portion and the concave part, straight chip groove on the working portion cuts apart into the blade holder with the working portion, all be equipped with the cutting edge on the preceding terminal surface of blade holder and the blade holder, the cutting edge on the preceding terminal surface of blade holder parallels with the cutting plane, the knife face that the cutting edge on the preceding terminal surface of blade holder was located with the cutting plane is alpha angle and lays.

Preferably, the value of the α angle is in the range of 2.5 ° to 5 °.

Preferably, the value of the γ angle is 90 ° or more.

Preferably, the surface of the working part is further provided with a coating.

Preferably, the thickness of the coating has a value of 3 μm to 5 μm.

Preferably, the material of the coating is alcrona.

Compared with the prior art, the utility model has the beneficial effects that:

1) and the cutter face where the cutting edge on the front end face of the cutter holder is arranged at an alpha angle with the cutting plane, so that heat generated during cutting can be dissipated conveniently.

2) Compared with the spiral chip grooves used in the prior art, the straight chip grooves are arranged, so that the core parts of the handle part 1, the working part 2 and the groove parts have certain thicknesses, the core parts are more compact, the core part sections of the working parts of the milling cutters become more discrete by the spiral angle of the spiral chip grooves in the milling cutters with the same specification, and the section areas of the core parts are not larger than the section areas of the core parts formed by the straight chip grooves, so that the integral rigidity and the strength of the working parts and the groove parts are favorably maintained during milling, the phenomenon of 'blade breakage' or 'tool breakage' is overcome, and the compact core parts are not limited to control of three cutting elements.

3) The processing of the workpiece with the horizontal end surface and the vertical surface in the workpiece can be considered through the cutting edge on the tool apron.

Drawings

The present invention will be described in further detail with reference to the drawings and the following detailed description.

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a partially enlarged view of the area a shown in fig. 1, and the two-dot chain line in the view indicates a cutting plane.

Fig. 4 is an isometric view of fig. 1.

Detailed Description

As shown in fig. 1 to 4, an end mill is disclosed, which comprises a shank 1, a working portion 2 connected to the shank 1, and a recess portion 3 provided between the shank 1 and the working portion 2, wherein the recess portion 3 is used for preventing stress concentration between the shank 1 and the working portion 2 and preventing the working portion 2 from being broken by impact force during milling.

The tool also comprises straight chip grooves 4 with gamma-angle openings, which are annularly arrayed on the shank part 1, the working part 2 and the groove part 3, wherein the straight chip grooves 4 on the working part 2 divide the working part 2 into tool holders 2-1, the number of the tool holders 2-1 is the same as that of the straight chip grooves 4, namely, the number of the tool holders 2-1 is changed according to the change of the number of the straight chip grooves 4.

The front end surface of the tool apron 2-1 and the tool apron 2-1 are both provided with a cutting edge 2-2, the cutting edge on the front end surface of the tool apron 2-1 is parallel to a cutting plane, and the cutting edge on the front end surface of the tool apron 2-1 is used for milling the plane of a workpiece.

As shown in fig. 3, the knife face 2-3 where the knife edge on the front end face of the knife holder 2-1 is located is arranged at an angle α with the cutting plane, so that heat generated during cutting can be dissipated.

Preferably, the value of said angle α is in the range of 2.5 ° to 5 °, in order to maintain the sharpness of the edge.

Preferably, the value of the gamma angle is greater than or equal to 90 degrees, so that the chip removal and the heat dissipation of the blade 2-2 on the tool apron 2-1 during milling of the vertical surface or the T-shaped groove of the workpiece are facilitated, and meanwhile, the processing and the manufacturing of the straight chip removal groove 4 are facilitated. Compared with the spiral chip grooves used in the prior art, the straight chip grooves 4 are arranged, so that the core parts of the handle part 1, the working part 2 and the groove part 3 have certain thickness, the core parts are more full, the core part sections of the working part of the milling cutter become more discrete by the spiral angle of the spiral chip grooves for milling cutters with the same specification, and the section area of the core part formed by the straight chip grooves 4 is not large, so that the integral rigidity and the strength of the holding part 1, the working part 2 and the groove part 3 are favorably maintained during milling, and the phenomenon of 'blade breakage' or 'tool breakage' can be overcome. The full core is not limited to control over three elements of cutting.

The surface of the working part 2 is also provided with a coating. The thickness of the coating layer is 3 to 5 μm, and the coating layer is made of alcrona of the company of Opercapax, which can bring a larger cutting speed and feed amount to the working part 2, and has good oxidation resistance and hot hardness grade, thereby improving the continuous working capability of the working part 2.

In conclusion, the cutting edge 2-2 on the tool apron 2-1 of the application can process both horizontal end face workpieces and vertical face workpieces.

The utility model is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. An end mill comprising a shank portion (1), a working portion (2) connected to the shank portion (1), and a recess portion (3) provided between the shank portion (1) and the working portion (2), characterized in that: still include that the annular array sets up in the straight chip groove (4) that have gamma angle open-ended on stalk portion (1), working portion (2) and recess portion (3), straight chip groove (4) on working portion (2) are cut apart into blade holder (2-1) with working portion (2), all be equipped with cutting edge (2-2) on the preceding terminal surface of blade holder (2-1) and blade holder (2-1), cutting edge and the cutting plane on the preceding terminal surface of blade holder (2-1) are parallel, knife face (2-3) that cutting edge on the preceding terminal surface of blade holder (2-1) was located with the cutting plane is alpha angle and lays.

2. An end mill according to claim 1, wherein: the value of the alpha angle is in the range of 2.5 deg. to 5 deg..

3. An end mill according to claim 1, wherein: the value of the gamma angle is equal to or greater than 90 deg.

4. An end mill according to claim 1, wherein: the surface of the working part (2) is also provided with a coating.

5. An end mill according to claim 4, wherein: the thickness of the coating has a value of 3 to 5 μm.

6. An end mill according to claim 4 or claim 5, wherein: the material of the coating is alcrona.