CN217666706U

CN217666706U - Open end milling cutter for rough machining

Info

Publication number: CN217666706U
Application number: CN202221653691.1U
Authority: CN
Inventors: 王荣凯
Original assignee: Xiamen Tongnai Tungsten Steel Co ltd
Current assignee: Xiamen Tongnai Tungsten Steel Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-10-28
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses an end mill for roughing, which relates to the field of milling cutters and comprises a handle part, a main cutter and an auxiliary cutter; the main cutter is connected with the handle part and comprises peripheral teeth, the peripheral teeth are spirally arranged on the periphery of the main cutter, a chip groove is formed between the peripheral teeth, and the main cutter also comprises a tooth breaking groove which is arranged on the peripheral teeth and communicated with the chip groove; the auxiliary cutter is connected with the main cutter and comprises end teeth, chip grooves are formed between the end teeth at intervals and communicated with the chip grooves, and the chip grooves communicated with adjacent chip grooves are further formed in the auxiliary cutter. The chip removal capability of the main cutter and the auxiliary cutter of the end milling cutter for rough machining is improved, and the service life of the cutter is prolonged.

Description

Open end milling cutter for rough machining

Technical Field

The utility model relates to a milling cutter field, concretely relates to open end milling cutter for rough machining.

Background

The end milling cutter is mainly used for processing grooves and step surfaces of workpieces and mainly comprises a main cutter, an auxiliary cutter and a handle part, wherein the main cutter and the auxiliary cutter are respectively positioned on the outer peripheral surface and the end surface of the end milling cutter, the workpieces are processed through the main cutter and the auxiliary cutter during working, and the chip removal capacity and the sharpness of the main cutter and the auxiliary cutter are two main factors influencing the working performance of the end milling cutter.

The conventional end milling cutter is mainly used for discharging scraps generated in machining outwards through a scrap discharge groove, the scraps are mostly in a fragment shape or a strip shape, and the fragment-shaped scraps can be discharged from the scrap discharge groove more quickly than the strip-shaped scraps.

The inventor is realizing the technical scheme of the utility model, discover that current end mill has following technical problem:

the main cutter and the auxiliary cutter of the existing end milling cutter mainly output waste chips through the chip removal grooves, but the chip removal capability is not enough, especially the chip removal capability of strip-shaped waste chips, and the chip removal capability is not enough, so that the service life of the end milling cutter is influenced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides an open end mill for rough machining, it is poor and influence life's problem to solve current end mill chip removal ability at least, can improve the sharpness of cutter.

(II) technical scheme

In order to solve the technical problem, the utility model provides a following technical scheme:

an end mill for roughing, comprising:

a handle;

the main cutter is connected with the handle part and comprises peripheral teeth, the peripheral teeth are spirally arranged on the periphery of the main cutter, a chip discharge groove is formed between the peripheral teeth, and the main cutter also comprises a tooth breaking groove which is arranged on the peripheral teeth and communicated with the chip discharge groove;

the auxiliary cutter is connected with the main cutter and comprises end teeth, chip grooves are formed between the end teeth at intervals and communicated with the chip grooves, and the chip grooves are communicated with the chip grooves.

In a further arrangement, the broken tooth groove is arranged on the part of the peripheral tooth close to the end tooth.

In a further arrangement, the cross section size of the tooth breaking groove is gradually enlarged towards the communication direction of the tooth breaking groove and the chip groove.

In a further arrangement, the tooth breaking grooves are arranged obliquely to the chip grooves.

In a further arrangement, the secondary knife further comprises a cutting edge formed by the junction of the chip breaker and the chip pocket.

In a further arrangement, the end tooth includes a convex edge located between the chip flute and the chip breaker, the convex edge being located at the center of the secondary knife.

In a further arrangement, the end mill has a diameter of 5.6mm.

(III) advantageous effects

Compared with the prior art, the utility model provides an open end milling cutter for rough machining possesses following beneficial effect:

the end mill for rough machining is provided with the tooth breaking groove on the peripheral teeth of the main cutter, the tooth breaking groove is communicated with the chip removal groove, a chip removal space is improved, meanwhile, the cutting edge formed by the tooth breaking groove on the peripheral teeth can cut strip-shaped scraps into chips, the scraps are convenient to discharge, and thus the chip removal capacity of the main cutter is improved; the end tooth is provided with a chip groove and a chip breaking groove, the chip groove and the chip removing groove are communicated to form a chip removing channel for scraps, the scraps generated by processing the auxiliary cutter can be discharged in time, and the chip breaking groove can improve the sharpness of the auxiliary cutter; it can be seen that the chip removal capability of the main cutter and the auxiliary cutter of the end mill is improved, and the service life of the cutter is prolonged.

Drawings

FIG. 1 is a perspective view of an end mill for roughing in the embodiment;

FIG. 2 is a front view of an embodiment of an end mill for roughing;

fig. 3 is a schematic view of section a in fig. 2.

Reference numerals: the cutting tool comprises a shank 1, a main cutter 2, an auxiliary cutter 3, a peripheral tooth 21, a chip groove 22, a tooth breaking groove 23, an end tooth 31, a chip groove 32, a chip breaking groove 33, a cutting edge 34 and a convex edge 35.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to fig. 1, fig. 2 and fig. 3 in the embodiment of the present invention, wherein fig. 1 is a perspective view of an embodiment of an end mill for rough machining, fig. 2 is a front view of an embodiment of an end mill for rough machining, and fig. 3 is a schematic view of a cross section a in fig. 2.

An end mill for roughing, comprising: the cutting tool comprises a handle 1, a main cutter 2 and an auxiliary cutter 3.

The shank 1 is intended to be connected to a machine tool and is driven to move and rotate at high speed by the machine tool.

The main cutter 2 is connected with the handle part 1 and comprises peripheral teeth 21, the peripheral teeth 21 are spirally arranged on the periphery of the main cutter 2, a chip discharge groove 22 is formed between the peripheral teeth 21, and the main cutter 2 further comprises a tooth breaking groove 23 which is arranged on the peripheral teeth 21 and communicated with the chip discharge groove 22.

The spiral angle of the peripheral teeth 21 of the main cutter 2 is preferably thirty to forty-five, the number of the peripheral teeth 21 can be selected according to the machining precision, namely, the number of teeth required for rough machining is less, the machining precision can be improved by increasing the number of the peripheral teeth 21, the chip discharge grooves 22 are also spiral in shape, the connecting parts of the edges of the tooth breaking grooves 23 and the peripheral teeth 21 form blades, the blades can cut off strip-shaped waste chips, the number and the intervals of the tooth breaking grooves 23 can be selected according to the requirements, and if 4 to 6 tooth breaking grooves 23 are arranged on each peripheral tooth 21, the intervals are 0.1mm to 2mm.

The auxiliary cutter 3 is connected with the main cutter 2 and comprises end teeth 31, chip grooves 32 are formed between the end teeth 31 at intervals, the chip grooves 32 are communicated with the chip grooves 22, and the chip breakers 33 communicated with the adjacent chip grooves 32 are further arranged on the auxiliary cutter 3.

The auxiliary cutter 3 is positioned at the end part of the end mill, the workpiece is processed through the end tooth 31, the scraps generated by processing are discharged through the chip groove 32 and the chip discharge groove 22, the chip breaking groove 33 is used for improving the chip discharge capacity and the sharpness of the auxiliary cutter 3, the chip breaking groove 33 and the chip groove 32 can be in smooth transition, but in order to improve the sharpness of the end mill, the connection part of the chip breaking groove 33 and the chip groove 32 is in non-smooth transition to form a cutting edge 34, and the cutting edge 34 can assist in cutting the workpiece.

The grooved groove type of the end mill is a forming groove, and indexing grinding is adopted, so that the angles of adjacent peripheral teeth 21 and/or end teeth 31 are not consistent, and the tooth breaking grooves 23 are increased on the peripheral teeth 21 by using the change of the angles.

According to the end mill for rough machining in the technical scheme, the tooth breaking grooves 23 are formed in the peripheral teeth 21 of the main cutter 2, the tooth breaking grooves 23 are communicated with the chip removal grooves 22, so that a chip removal space is improved, and meanwhile, the blade formed by the tooth breaking grooves 23 on the peripheral teeth 21 can cut strip-shaped waste chips into chips, so that the waste chips are conveniently discharged, and the chip removal capacity of the main cutter 2 is improved; the end tooth 31 is provided with a chip groove 32 and a chip breaking groove 33, the chip groove 32, the chip breaking groove 33 and the chip removing groove 22 are sequentially communicated to form a chip removing channel for scraps, the scraps produced by processing the auxiliary cutter 3 can be timely discharged, the chip groove 32 is internally provided with the chip breaking groove 33 for widening a chip containing space, and the design of the chip breaking groove 33 can also improve the sharpness of the auxiliary cutter 3; this end milling cutter improves the life of cutter through the promotion of the chip removal ability of main cutter 2 and vice sword 3, reduces the wearing and tearing of sweeps to the cutter, improves the quantity of single sword processing machined part, reduces manufacturing cost and the frequent manual tool changing operation that the cutter damage brought.

In order to ensure the rigidity of the cutter to the maximum extent and to take into account the improvement of the sharpness and the chip removal capability of the main cutter 2, the tooth breaking groove 23 is provided at a portion of the peripheral tooth 21 close to the end tooth 31, that is, the tooth breaking groove 23 preferably does not cover all the area of the peripheral tooth 21 but is distributed at an end portion close to the end tooth 31.

In order to facilitate the discharge of the waste scraps, the size of the cross section of the tooth breaking groove 23 is gradually enlarged towards the communication direction between the tooth breaking groove 23 and the chip removing groove 22, and meanwhile, the tooth breaking groove 23 is arranged obliquely to the chip removing groove 22, so that when the peripheral teeth 21 of the end mill are spirally fed, the waste scraps can be discharged outwards along the tooth breaking groove 23, the tooth breaking groove 23 forms a necking structure along the spiral feeding direction, the waste scraps can be better cut off, and the difficulty in discharging the waste scraps is reduced.

In one embodiment of the above-mentioned counter cutter 3, the end tooth 31 includes a convex edge 35 located between the chip groove 32 and the chip breaker groove 33, and the convex edge 35 is located at the center of the counter cutter 3, that is, the convex edge 35 is formed by dividing the end tooth 31 by the chip groove 32 and the chip breaker groove 33, and is tapered, so that the sharpness of the counter cutter 3 can be improved, and the drilling feeding can be facilitated.

The diameter of the end mill can be selected as desired, such as a 5.6mm diameter end mill in this embodiment, a modification of a conventional D5.6 end mill.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An end mill for roughing, comprising:

a handle;

2. The roughing end mill according to claim 1, wherein said broken tooth groove is provided in a portion of said peripheral tooth near an end tooth.

3. The end mill for roughing according to claim 1, wherein a cross-sectional dimension of said tooth-breaking groove is gradually enlarged in a direction of communication with said chip groove.

4. The roughing end mill according to claim 3, wherein said tooth breaking groove is provided obliquely to said chip groove.

5. The roughing end mill according to claim 1 wherein said secondary cutter further comprises a cutting edge formed by a junction of a chip breaker and a chip pocket.

6. The roughing end mill of claim 1 wherein said end tooth includes a convex edge located between said chip and chip breakers, said convex edge being located at the center of said secondary cutter.

7. The roughing end mill according to claim 1, wherein said end mill has a diameter of 5.6mm.