CN210848523U

CN210848523U - Gradual change helical angle milling cutter

Info

Publication number: CN210848523U
Application number: CN201921700711.4U
Authority: CN
Inventors: 王迪
Original assignee: Suzhou Spandi Precision Tools Co ltd
Current assignee: Chuzhou Yongpu Alloy Tool Co ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-06-26
Anticipated expiration: 2029-10-11

Abstract

The utility model discloses a gradual change spiral angle milling cutter, including handle of a knife and cutter body, the cutter body includes all sword, end sword and helicla flute, its characterized in that: the outer diameters of the cutter body and the cutter handle are the same, the spiral angle of the spiral groove is uniformly reduced from the bottom cutting edge end to the joint of the cutter body and the cutter handle, the maximum spiral angle of the spiral groove is 38 degrees, and the minimum spiral angle of the spiral groove is 28 degrees.

Description

Gradual change helical angle milling cutter

Technical Field

The utility model relates to a milling cutter, more specifically say, it relates to a gradual change spiral angle milling cutter.

Background

At present, a chip removal groove surface communicated with a spiral groove of the end mill is generally manufactured behind a rear corner surface of each cutter tooth of the end mill on a traditional end mill, so that chips generated during cutting processing of the end mill are directly discharged to the spiral groove through the chip removal groove surface and then discharged to the outside of the end mill.

The existing spiral groove adopts a completely uniform spiral angle, when the angle of the spiral angle is large, the cutting force is large, but the cutting force is greatly changed after entering the spiral groove, so that the problems of chip blocking and chip removal unsmooth are easily caused, the cutter damage and the product quality reduction are caused, and the normal processing is influenced; if a smaller helical angle is adopted, the chip removal speed is high, but the cutting force of the tool nose is insufficient, the strength of the tool is low, and the service life of the tool is short; in addition, the use of a uniform helix angle is more likely to cause vibration during processing, resulting in poor surface quality of the product. Thus, the existing end mill still has many defects in machining performance.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a gradual change spiral angle milling cutter, it has easily chip removal, and the cutting force is big, the characteristics of difficult vibration.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a gradual change helical angle milling cutter, includes handle of a knife and cutter body, the cutter body includes week sword, end sword and helicla flute, its characterized in that: the outer diameters of the cutter body and the cutter handle are the same, the size of a spiral angle of the spiral groove from the end cutting edge to the joint of the cutter body and the cutter handle is uniformly reduced, the maximum spiral angle of the spiral groove is 38 degrees, and the minimum spiral angle of the spiral groove is 28 degrees.

Preferably, the thickness of the core of the cutter body gradually increases from the bottom edge end to the handle end, and the thickness of the core of the cutter body is 50% of the outer diameter of the cutter body at the minimum and 65% of the outer diameter of the cutter body at the maximum.

Preferably, the inclination angle of the chip groove of the bottom blade is 40-45 degrees.

Preferably, the peripheral edge rake angle is 6 °, the peripheral edge first relief angle is 12 °, the peripheral edge first relief angle edge width is 0.6mm, and the peripheral edge second relief angle is 12 °.

Preferably, the first end edge relief angle is 8 °, the second end edge relief angle is 16 °, and the first end edge relief angle edge width is 0.7.

Preferably, the length of the cutter body is 1/3 of the length of the cutter handle.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the front end of the spiral groove adopts a 38-degree spiral angle for increasing the cutting force, the spiral groove adopts a 28-degree spiral angle close to the cutter handle part, the chip removal space is increased, the whole spiral line is uniformly and gradually changed, the chip removal capability is strong, the milling capability is strong, and vibration is not easy to generate;

2. the thickness of the core at the front end of the cutter body is 50 percent, the thickness of the core at the rear end is 65 percent, the chip containing space is enlarged at the front end, the chip containing rate is high, chips are not easy to block, the cutter with the thick core at the rear end has high strength, vibration is not easy to generate, and the cutter is suitable for finish machining and semi-finish machining.

Drawings

FIG. 1 is a schematic view of the present cutter structure;

fig. 2 is a schematic view of the bottom edge structure.

In the figure: 1. a knife handle; 2. a cutter body; 21. a peripheral edge; 22. a bottom edge; 23. a helical groove; A. a peripheral edge first relief angle; B. a peripheral edge second relief angle; C. a bottom edge first relief angle; D. a bottom edge second relief angle; E. inclination of chip pocket; F. the bottom edge first relief angle edge width; G. a peripheral edge first relief angle edge width; H. the peripheral edge rake angle.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a gradual change spiral angle milling cutter, refers to fig. 1 and 2, and it includes handle of a knife 1 and cutter body 2, and cutter body 2 includes all cutting edges 21, end cutting edge 22 and helicla flute 23, and cutter body 2 is the same with the external diameter of handle of a knife 1, and cutter body 2 length is 1/3 of handle of a knife 1 length. The spiral angle of the spiral groove 23 is uniformly reduced from the end part of the bottom blade 22 to the hinged part of the cutter body 2 and the cutter handle 1, the maximum spiral angle of the spiral groove 23 is 38 degrees, the minimum spiral angle is 28 degrees, the front end of the spiral groove 23 is a 38-degree spiral angle for increasing the cutting force, the rear end of the spiral groove is a 28-degree spiral angle, the cutting space is gradually increased, the whole spiral line is uniformly gradually changed, the cutting capacity is high, the milling capacity is high, and vibration is not easy to generate.

The core thickness of the cutter body 2 is gradually increased from the end of the bottom blade 22 to the end of the cutter handle 1, the core thickness of the cutter body 2 is 50% of the outer diameter of the cutter body 2 at the minimum and 65% of the outer diameter of the cutter body 2 at the maximum, the chip containing space is enlarged at the front end, the chip containing rate is high, chips are not easily blocked, the core thickness of the rear end is large, the strength is high, vibration is not easily generated, and the cutter is suitable for finish machining and semi-finish.

Referring to fig. 1 and 2, the chip groove inclination angle E of the bottom blade 22 is 40-45 °, the first back angle C of the bottom blade is 8 °, the second back angle D of the bottom blade is 16 °, the first back angle blade width F of the bottom blade is 0.7, and the chip feeding effect is improved.

In order to improve the strength of the cutter body 2, the front angle H of the peripheral edge is 6 degrees, the first back angle A of the peripheral edge is 12 degrees, the width G of the first back angle of the peripheral edge is 0.6mm, and the second back angle B of the peripheral edge is 12 degrees.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a gradual change helical angle milling cutter, includes handle of a knife and cutter body, the cutter body includes week sword, end sword and helicla flute, its characterized in that: the outer diameters of the cutter body and the cutter handle are the same, the size of a spiral angle of the spiral groove from the end cutting edge to the joint of the cutter body and the cutter handle is uniformly reduced, the maximum spiral angle of the spiral groove is 38 degrees, and the minimum spiral angle of the spiral groove is 28 degrees.

2. The progressive helical angle mill of claim 1, wherein: the thickness of the core of the cutter body is gradually increased from the bottom edge end to the cutter handle end, the minimum thickness of the core of the cutter body is 50% of the outer diameter of the cutter body, and the maximum thickness of the core of the cutter body is 65% of the outer diameter of the cutter body.

3. The progressive helical angle mill of claim 1, wherein: the inclination angle of the chip groove of the bottom edge is 40-45 degrees.

4. The progressive helical angle mill of claim 1, wherein: the front angle of the peripheral edge is 6 degrees, the first back angle of the peripheral edge is 12 degrees, the width of the first back angle of the peripheral edge is 0.6mm, and the second back angle of the peripheral edge is 12 degrees.

5. The progressive helical angle mill of claim 1, wherein: the first end edge relief angle is 8 °, the second end edge relief angle is 16 °, and the width of the first end edge relief angle is 0.7.

6. The progressive helical angle mill of claim 1, wherein: the cutter body length is 1/3 of handle of a knife length.