CN211708208U

CN211708208U - Titanium alloy double-chip-groove round nose milling cutter

Info

Publication number: CN211708208U
Application number: CN201922400719.5U
Authority: CN
Inventors: 蒋杰; 于杨凡
Original assignee: Yibin Zhiwei Technology Co ltd
Current assignee: Yibin Zhiwei Technology Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-20
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to a two chip groove nose rounding mills of titanium alloy, include the tool bit of being connected with the cutter arbor, the tool bit terminal surface is provided with long tooth and short tooth, long tooth and short tooth set up in the tool bit terminal surface in turn, and the cutting edge that long tooth and short tooth formed extends in the first chip groove of tool bit axial formation, be provided with smooth connection' S second chip groove between the tooth clearance angle that long tooth and short tooth formed and the first chip groove, adopt the design of two chip grooves, get rid of original boss, make S-GASH lower part and chip groove smooth transition, greatly reduced take place to glue the possibility of sword, the cutter life-span promotes more than 30%.

Description

Titanium alloy double-chip-groove round nose milling cutter

Technical Field

The utility model relates to a cutter field, concretely relates to two chip groove round nose milling cutters of titanium alloy.

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. It can be classified according to structure: cylindrical milling cutters, face milling cutters, end milling cutters, face and face milling cutters, angle milling cutters, saw blade milling cutters, T-shaped milling cutters, and the like. The cylindrical milling cutter is also called a round nose milling cutter and is used for processing a plane on a horizontal milling machine. The cutter teeth are distributed on the circumference of the milling cutter and are divided into straight teeth and spiral teeth according to tooth profiles. The teeth are divided into coarse teeth and fine teeth. The helical tooth coarse-tooth milling cutter has the advantages of less tooth number, high cutter tooth strength and large chip containing space, and is suitable for rough machining and fine machining.

The lower end of the traditional round nose cutter designed with S-GASH (tooth clearance angle) is easy to generate a boss, and the boss is easy to be bonded and generate accumulated bits and tumors when processing titanium alloy. The titanium alloy has larger plasticity and toughness, and is not easy to break off during milling. Under high temperature and high pressure, the cutter is easy to generate adhesive wear and accumulated filings, and the service life of the cutter is not high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a two chip groove circle nose milling cutter of titanium alloy, adopt the design of two chip grooves, get rid of original boss, make S-GASH lower part and chip groove smooth transition, greatly reduced take place to glue the possibility of sword, cutter life-span promotes more than 30%.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a two chip groove round nose milling cutters of titanium alloy, includes the tool bit of being connected with the cutter arbor, the tool bit terminal surface is provided with long tooth and short tooth, long tooth and short tooth set up in the tool bit terminal surface in turn, and the cutting edge that long tooth and short tooth formed extends in the tool bit axial direction and forms first chip groove, be provided with smooth connection's second chip groove between the tooth clearance angle that long tooth and short tooth formed and the first chip groove.

According to the scheme, the boss structure between the cutter teeth on the end face of the traditional cutter head and the first chip groove is improved into the second chip groove which is connected smoothly, so that the second chip groove is communicated with the first chip groove, a double-chip groove structure is formed, the condition that iron chips are stuck on the boss due to high temperature when the traditional cutter head works is improved, the iron chips can enter the first chip groove along the trend, the possibility of cutter sticking is greatly reduced, and the service life of the cutter is prolonged by more than 30%.

Furthermore, the second chip pocket and the tooth clearance angle are in circular arc smooth connection. The circular arc smooth connection is adopted, so that an invaginated concave surface is formed at the joint of the circular arc smooth connection and serves as a second chip groove, and the sticking of a knife is avoided.

Furthermore, an included angle formed between the front end of the first chip groove and the end face of the cutter head is 35 degrees, and an included angle formed between the front end of the second chip groove and the end face of the cutter head is 55 degrees.

Furthermore, the long teeth and the short teeth are distributed in a crossed manner, the two long teeth are in staggered butt joint through the centers of the end faces of the cutter heads, and the length of the long teeth on one side through the centers is 0.06-0.11 mm. The two long teeth are in staggered butt joint through the center of the end face of the cutter head, and the iron scraps can be prevented from being gathered together when the cutter head works, so that a good iron scrap shunting effect is realized.

Further, the long teeth and the short teeth extend reversely and are spirally distributed in the axial direction of the cutter head, and the spiral angle is 30 degrees +/-1 degree.

The utility model has the advantages that: the scheme adopts the design of double chip grooves, removes the original boss, enables the lower part of the S-GASH to be in smooth transition with the chip grooves, forms a small section of chip grooves communicated with the traditional chip grooves, and replaces the original boss, and in the working process, as the boss is not blocked, the iron chips can enter the first chip groove from the section of chip grooves along the same line, thereby greatly reducing the possibility of the occurrence of cutter sticking and prolonging the service life of the cutter by more than 30 percent.

Drawings

FIG. 1 is a general schematic view of the present invention;

FIG. 2 is a cross-sectional view of the tool bit of the present invention;

FIG. 3 is a schematic view of a first flute included angle;

FIG. 4 is a cross-sectional view of a first chip flute;

FIG. 5 is a schematic end view of a tool tip;

FIG. 6 is a side schematic view of a tool tip;

fig. 7 is a schematic view of the junction of the second chip flute and the cutter tooth.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

As shown in fig. 1, the titanium alloy double-chip groove round nose milling cutter comprises a cutter head 2 connected with a cutter rod 1, wherein the end surface of the cutter head 2 is provided with long teeth 3 and short teeth 4, and the structure of the cutter head can be referred to fig. 2. Fig. 2 shows the most common design at present, that is, four cutting edges are arranged in the axial direction of the cutter head 2, a pair of long teeth 3 and a pair of short teeth 2 are formed on the end surface of the cutter head 2, the long teeth 3 and the short teeth 4 are distributed in a cross shape, the two long teeth 3 are in staggered butt joint through the center of the end surface of the cutter head 2, the length of the over center of the long tooth 3 on one side is 0.06-0.11mm, and the structure can be seen in fig. 5. First chip flutes 6 are formed axially between the axial cutting edges of the cutting head 2, which in the present embodiment are helically distributed with a helix angle of 30 ° ± 1 °. In the present case, the tooth clearance angle formed by the long teeth 3 and the short teeth 4 between the end face of the cutting head 2 and the first chip flute 6 is convex and has a certain chamfer. In order to improve the problem of iron chip bonding caused by the tooth clearance angle in the present embodiment, the second chip pocket 5 is designed in a convex shape, and the structure thereof can be referred to fig. 6. The bottom of the first chip flute 6 forms an arc included angle with the radius r2, and the communicating part of the second chip flute 5 and the side wall of the first chip flute 6 forms an arc included angle with the radius r1, and the structure can be referred to fig. 4. The second chip flute 5, which forms a smooth connection between the clearance angle formed by the long tooth 3 and the short tooth 4 and the first chip flute 6, is formed. The second chip flute 5 and the tooth clearance angle are smoothly connected in a circular arc shape, the diameter of the circular arc is 2mm, and the structure can be seen with reference to fig. 7. As shown in fig. 3, the angle formed between the front end of the first chip flute 6 and the end surface of the cutting head 2 is 35 °, and the angle formed between the front end of the second chip flute 5 and the end surface of the cutting head 2 is 55 °.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a two chip pocket round nose milling cutters of titanium alloy, includes tool bit (2) of being connected with cutter arbor (1), tool bit (2) terminal surface is provided with long tooth (3) and short tooth (4), long tooth (3) and short tooth (4) set up in turn at tool bit (2) terminal surface, and the cutting edge that long tooth (3) and short tooth (4) formed extends in reverse at tool bit (2) axial formation first chip pocket (6), its characterized in that, be provided with smooth connection's second chip pocket (5) between tooth clearance angle that long tooth (3) and short tooth (4) formed and first chip pocket (6).

2. A titanium alloy double flute round nose milling cutter according to claim 1, characterized in that the second flute (5) and the clearance angle are smoothly connected in a circular arc shape.

3. A titanium alloy double flute round nose milling cutter according to claim 1, characterized in that the included angle formed between the front end of the first flute (6) and the end surface of the cutter head (2) is 35 °, and the included angle formed between the front end of the second flute (5) and the end surface of the cutter head (2) is 55 °.

4. The titanium alloy double-chip-flute round nose milling cutter as claimed in claim 1, characterized in that the long teeth (3) and the short teeth (4) are distributed crosswise in a cross shape, the two long teeth (3) are in staggered butt joint through the center of the end face of the cutter head (2), and the length of the one-side long teeth (3) passing through the center is 0.06-0.11 mm.

5. A titanium alloy double flute round nose milling cutter according to claim 1, characterized in that the long teeth (3) and the short teeth (4) extend helically in opposite directions in the axial direction of the cutter head (2) with a helix angle of 30 ° ± 1 °.