CN210451128U

CN210451128U - End milling cutter for processing non-high-hardness material

Info

Publication number: CN210451128U
Application number: CN201921165617.3U
Authority: CN
Inventors: 宋德刚
Original assignee: Beijing Boying Tuo Technology Co ltd
Current assignee: Beijing Boying Tuo Technology Co ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-05-05
Anticipated expiration: 2029-07-23

Abstract

An end mill for processing non-high-hardness materials comprises a cylindrical cutter handle, wherein a cutter head is arranged at the tail end of the cutter handle; the periphery of the cutter head is provided with a first circumferential blade and a second circumferential blade which are symmetrical in pairs; the first circumferential edge and the second circumferential edge are helical and have the same helical direction, and a helical chip pocket is formed between the adjacent first circumferential edge and the second circumferential edge; the middle parts of the first circumferential edge and the second circumferential edge are provided with U-shaped chip breakers; the angles between the first circumferential edge and the second circumferential edges at two sides are 93 degrees and 87 degrees respectively; the rear angle of the first circumferential blade is concave in a circular arc shape; the front end surface of the first circumferential edge is provided with a first bottom edge, and the front end surface of the second circumferential edge is provided with a second bottom edge; the first bottom edge and the second bottom edge are both recessed by 1 degree 30'. The utility model discloses when carrying out rough machining and half smart man-hour, can reduce the processing vibrations, improve the cutter life-span, reduce shut down cutter change time, reach the purpose that reduces the cost of manufacture.

Description

End milling cutter for processing non-high-hardness material

Technical Field

The utility model relates to a machining cutter, especially an end mill of processing non-high hard material.

Background

A milling cutter is a rotating tool with one or more cutter teeth for milling. When in work, each cutter tooth cuts off the allowance of the workpiece in sequence and intermittently. The milling cutter is mainly used for processing planes, steps, grooves, formed surfaces, cut-off workpieces and the like on a milling machine. With the continuous development of manufacturing industry, the demand for high-performance milling cutters is increasing. However, for non-high-hardness materials, the existing milling cutter, especially the end milling cutter, has large vibration, short service life of the cutter, long time for replacing the cutter during shutdown and high manufacturing cost during rough machining and semi-finish machining, and needs to be improved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a processing is end milling cutter of high hard material of non-, when carrying out rough machining and half smart man-hour, can reduce the processing vibrations, improve the cutter life-span, reduce and shut down the cutter change time, reach the purpose that reduces the cost of manufacture.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an end mill for processing non-high-hardness materials comprises a cylindrical cutter handle, wherein a cutter head is arranged at the tail end of the cutter handle; the periphery of the cutter head is provided with a first circumferential blade and a second circumferential blade which are symmetrical in pairs; the first circumferential edge and the second circumferential edge are helical and have the same helical direction, and a helical chip pocket is formed between the adjacent first circumferential edge and the second circumferential edge; the middle parts of the first circumferential edge and the second circumferential edge are provided with U-shaped chip breakers; the angles between the first circumferential edge and the second circumferential edges at two sides are 93 degrees and 87 degrees respectively; the rear angle of the first circumferential blade is concave in a circular arc shape;

the front end surface of the first circumferential edge is provided with a first bottom edge, and the front end surface of the second circumferential edge is provided with a second bottom edge; the first bottom edge and the second bottom edge are both recessed by 1 degree 30'.

Further, on the cross section of the cutter head, an angle between the chip groove and the central axis of the cutter head is 37 degrees.

Further, the relief angle of the first circumferential edge is 10 °, and the relief angle of the second circumferential edge is 1.45 times the relief angle of the first circumferential edge.

Further, the tips of the first and second bottom edges have rounded corners with a radius of 0.5 mm.

Further, the width and the height of the chip breaker are both 0.6 mm.

The utility model has the advantages that: the utility model discloses the end mill of processing non-high hard material through the control to milling cutter shape, each size, when carrying out rough machining and semi-finish machining, can reduce the processing vibrations, improves the cutter life-span, reduces the shut down cutter change time, reaches the purpose that reduces the cost of manufacture.

Drawings

Fig. 1 is a schematic structural view of the end mill for processing non-high-hardness materials according to the present invention.

Fig. 2 is a side view of the present invention at the bit of an end mill for machining non-high-hardness materials.

Fig. 3 is a sectional view taken in the direction of a-a in fig. 1.

Fig. 4 is a schematic structural view of a chip breaker of the end mill for processing non-high-hardness materials according to the present invention.

Fig. 5 is a schematic view of the first circumferential edge of the end mill for machining a non-high-hardness material according to the present invention.

Detailed Description

In order to make the technical solution and the advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the following embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-5, the utility model provides an end mill for processing non-high-hardness material, which comprises a cylindrical tool handle 1, wherein the end of the tool handle 1 is provided with a tool bit 2. The periphery of the cutter head 2 is provided with a first circumferential edge 21 and a second circumferential edge 22 which are symmetrical in pairs. The first circumferential edge 21 and the second circumferential edge 22 are helical and have the same helical direction, and a helical chip pocket 3 is formed between the adjacent first circumferential edge 21 and the second circumferential edge 22. In the cross-section of the tool insert, the angle between the chip flute 3 and the central axis of the tool insert 2 (dashed line in fig. 1) is 37 degrees, which is satisfactory both for rough machining and for semi-finishing. The chip groove 3 is polished by a forming grinding wheel, so that enough chip containing space is reasonably provided, and simultaneously, chips can be smoothly discharged, and the strength requirement of the maximum bottom edge is met. The U-shaped chip breaker groove 4 is formed in the middle of the first circumferential edge 21 and the second circumferential edge 22, the situation that machining chips are too long to wind a cutter or a stacking workbench influences subsequent machining is avoided, and the width and the height of the chip breaker groove 4 are both 0.6 mm. The chip pocket 3 is ground by adopting a 4-blade unequal design, so that the angles between the first circumferential blade 21 and the second circumferential blades 22 on two sides are respectively 93 degrees and 87 degrees, namely 93 degrees, 87 degrees, 93 degrees and 87 degrees, and the vibration of the tangential symmetry axis can be reduced during processing. As shown in fig. 5, the relief angle of the first circumferential edge 21 is concave in the arc, and the sharpness is improved while the strength of the bottom edge is ensured, so that the service life of the tool can be effectively prolonged, the wear width of the bottom edge is smaller than that of the circumferential edge under the condition of the same wear depth, and the wear width is reduced due to the replacement of the tool, so that the service life of the circumferential edge is prolonged compared with that of the original circumferential edge due to the small wear width. The relief angle of the first circumferential edge 21 is 10 °, and the relief angle of the second circumferential edge 22 is 1.45 times the relief angle of the first circumferential edge 21.

The front end surface of the first circumferential edge 21 has a first end edge 23, and the front end surface of the second circumferential edge 22 has a second end edge 24. This first end sword 23 and second end sword 24 all inwards indent 1 30', have guaranteed the intensity of end sword, improve the end sword sharpness simultaneously, and the pointed end of this first end sword 23 and second end sword 24 is equipped with R0.5 (adjustable according to the actual conditions) chamfer and prevents heavy cutting tipping.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all still fall within the scope of the technical solution of the present invention.

Claims

1. The end mill for processing the non-high-hardness material is characterized by comprising a cylindrical cutter handle, wherein the tail end of the cutter handle is provided with a cutter head; the periphery of the cutter head is provided with a first circumferential blade and a second circumferential blade which are symmetrical in pairs; the first circumferential edge and the second circumferential edge are helical and have the same helical direction, and a helical chip pocket is formed between the adjacent first circumferential edge and the second circumferential edge; the middle parts of the first circumferential edge and the second circumferential edge are provided with U-shaped chip breakers; the angles between the first circumferential edge and the second circumferential edges at two sides are 93 degrees and 87 degrees respectively; the rear angle of the first circumferential blade is concave in a circular arc shape;

2. An end mill for machining non-high hard materials according to claim 1, characterized in that: on the cross section of the cutter head, an angle between the chip groove and the central axis of the cutter head is 37 degrees.

3. An end mill for machining non-highly hard materials according to claim 1 or 2, characterized in that: the relief angle of the first circumferential edge is 10 °, and the relief angle of the second circumferential edge is 1.45 times the relief angle of the first circumferential edge.

4. An end mill for machining non-highly hard materials according to claim 1 or 2, characterized in that: the tips of the first and second bottom edges have rounded corners with a radius of 0.5 mm.

5. An end mill for machining non-highly hard materials according to claim 1 or 2, characterized in that: the width and the height of the chip breaker are both 0.6 mm.