CN214053811U

CN214053811U - Ball end milling cutter for processing 50-55HRC die cavity

Info

Publication number: CN214053811U
Application number: CN202022798898.5U
Authority: CN
Inventors: 杨德志; 刘波
Original assignee: Guizhou Southwest Tool Group Co Ltd
Current assignee: Guizhou Southwest Tool Group Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-08-27
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a bulb milling cutter for processing 50-55HRC mould cavity, including the handle of a knife and be connected the cutting portion as an organic whole with the handle of a knife, be provided with two heliciform all edges symmetrically on the circumference of cutting portion, be provided with spiral chip groove between two heliciform all edges, be provided with the ball sword of being connected with two heliciform all edges at the tip of cutting portion, be provided with the chisel edge in the center department of ball sword. The utility model processes the die cavity by the two spiral peripheral blades and the ball blade, thereby improving the processing efficiency and ensuring the processing quality; and simultaneously, the utility model discloses center department at the ball sword passes through the chisel edge transition to eliminate the cusp of milling cutter tip, protect the milling cutter tip and be difficult for collapsing scarcely, improve the life of cutter.

Description

Ball end milling cutter for processing 50-55HRC die cavity

Technical Field

The utility model relates to a bulb milling cutter for processing 50-55HRC mould die cavity belongs to machining cutter technical field.

Background

Molds are used in large quantities in the manufacture of automobiles, motorcycles, machinery, electronics, building materials, glass, rubber, and household electrical products. In the period of high-speed development of mold manufacturing, the requirement on the mold is increasingly improved in China, and in order to meet the requirements of high precision, high efficiency, high surface roughness and long service life of the mold, the prior processing technology is developed from the prior low-speed processing to the high-speed milling processing, the hardness of the mold is harder than that of the prior art, the mold is more difficult to process, the high-hardness mold cannot be well processed by a cutter with low hardness, and the problems of short service life of the cutter, high processing cost, incapability of meeting the requirement on the quality of a mold cavity and the like exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bulb milling cutter for processing 50-55HRC mould die cavity, this milling cutter has long service life, the processing cost is lower, the reliable advantage of product quality.

In order to achieve the above object, the utility model provides a following technical scheme: a ball end mill for processing a 50-55HRC mold cavity comprises a cutter handle and a cutting part connected with the cutter handle into a whole, wherein two spiral peripheral edges are symmetrically arranged on the circumference of the cutting part, a spiral chip groove is arranged between the two spiral peripheral edges, a ball edge connected with the two spiral peripheral edges is arranged at the end part of the cutting part, and a cross edge is arranged at the center of the ball edge.

Further, the helix angle of the helical peripheral edge is left-handed by 30 °.

Further, the helical peripheral edge has a peripheral edge rake angle of 8 to 12 °, a peripheral edge first relief angle of 10 to 13 °, and a peripheral edge second relief angle of 23 to 25 °.

Further, the peripheral edge groove depth of the helical peripheral edge is 0.12 × edge diameter.

Further, the ball blade front angle of the ball blade is 10-12 degrees, the ball blade first relief angle is 12-14 degrees, and the ball blade second relief angle is 23-25 degrees.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model processes the die cavity by the two spiral peripheral blades and the ball blade, thereby improving the processing efficiency and ensuring the processing quality; and simultaneously, the utility model discloses center department at the ball sword passes through the chisel edge transition to eliminate the cusp of milling cutter tip, protect the milling cutter tip and be difficult for collapsing scarcely, improve the life of cutter.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a schematic view of the structure of the ball blade;

FIG. 4 is a cross-sectional view B-B of FIG. 1;

FIG. 5 is a cross-sectional view taken along line D-D of FIG. 3;

fig. 6 is an enlarged view of fig. 2 at P.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail with reference to the accompanying drawings and examples.

The embodiment of the utility model provides a: a schematic structural diagram of a ball end mill for machining a 50-55HRC mold cavity is shown in figures 1-6, and the ball end mill comprises a cutter handle 1 and a cutting part 2 connected with the cutter handle 1 into a whole, wherein two spiral peripheral edges 3 are symmetrically arranged on the circumference of the cutting part 2, a spiral chip groove 4 is arranged between the two spiral peripheral edges 3, a ball edge 5 connected with the two spiral peripheral edges 3 is arranged at the end part of the cutting part 2, and a cross edge 6 is arranged at the center of the ball edge 5.

Further, the helical angle ω of the helical peripheral edge 3 is left-handed by 30 °.

Further, the peripheral edge rake angle y of the helical peripheral edge 3 is 10 °, the peripheral edge first relief angle a is 12 °, and the peripheral edge second relief angle a is 24 °.

Further, the peripheral edge groove depth H of the helical peripheral edge 3 is 0.12 × edge diameter.

Further, the ball blade front angle y1 of the ball blade 5 is 12 °, the ball blade first relief angle a1 is 14 °, and the ball blade second relief angle a1 is 25 °.

In conclusion, the utility model processes the die cavity by the two spiral peripheral blades 3 and the ball blade 5, thereby improving the processing efficiency and ensuring the processing quality; and simultaneously, the utility model discloses locate through chisel edge 6 transition at the center of ball sword 5 to eliminate the cusp of milling cutter tip, protect the milling cutter tip and be difficult for collapsing scarcely, improve the life of cutter.

Claims

1. The utility model provides a ball end mill for processing 50-55HRC mould die cavity, includes handle of a knife (1) and is connected cutting part (2) as an organic whole with handle of a knife (1), its characterized in that: two spiral peripheral blades (3) are symmetrically arranged on the circumference of the cutting part (2), a spiral chip groove (4) is arranged between the two spiral peripheral blades (3), a ball blade (5) connected with the two spiral peripheral blades (3) is arranged at the end part of the cutting part (2), and a cross blade (6) is arranged at the center of the ball blade (5).

2. The ball nose mill for machining 50-55HRC mold cavities according to claim 1, wherein: the helical angle (omega) of the helical peripheral edge (3) is left-handed by 30 degrees.

3. The ball nose mill for machining 50-55HRC mold cavities according to claim 1, wherein: the helical peripheral edge (3) has a peripheral edge rake angle (y) of 8-12 degrees, a peripheral edge first relief angle (a) of 10-13 degrees, and a peripheral edge second relief angle (A) of 23-25 degrees.

4. The ball nose mill for machining 50-55HRC mold cavities according to claim 1, wherein: the peripheral edge groove depth (H) of the spiral peripheral edge (3) is 0.12 × edge diameter.

5. The ball nose mill for machining 50-55HRC mold cavities according to claim 1, wherein: the ball blade front angle (y1) of the ball blade (5) is 10-12 degrees, the ball blade first relief angle (a1) is 12-14 degrees, and the ball blade second relief angle (A1) is 23-25 degrees.