CN105499680A

CN105499680A - Bevel gear T-shaped milling cutter for chamfering thin-wall stepped hole

Info

Publication number: CN105499680A
Application number: CN201610095577.4A
Authority: CN
Inventors: 代中华; 胡其林; 胡静
Original assignee: Chengdu Youtuo Youlian Technology Co Ltd
Current assignee: Chengdu Youtuo Youlian Technology Co Ltd
Priority date: 2016-02-22
Filing date: 2016-02-22
Publication date: 2016-04-20

Abstract

The invention discloses a bevel gear T-shaped milling cutter for chamfering a thin-wall stepped hole. The bevel gear T-shaped milling cutter comprises a cutter rod (1) and a cutter head (2), the cutter head (2) is integrally formed at one end of the cutter rod (1), multiple milling blades (3) are arranged on the cutter head (2), a milling face (4) is arranged at the end, near the cutter rod (1), of each milling blade (3), the included angle of each milling face (4) and the shaft axis of the cutter rod (1) ranges from 42 degrees to 48 degrees, a chip removing groove (5) is formed between every two adjacent milling blades (3), and the included angle alpha is formed between the two side walls of each chip removing groove (5). The bevel gear T-shaped milling cutter for chamfering the stepped hole has the advantages that the structure is simple, machining is convenient, and the machining quality is high.

Description

A kind of for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth

Technical field

The present invention relates to the T-shaped milling cutter of umbrella tooth, particularly a kind of for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth.

Background technology

In Process of Oil Well Drilling, because geology is comparatively complicated, the structure of the workpiece of therefore used instrument is comparatively complicated, and it is higher to its required precision, particularly a kind of inner core of oil drilling, there are in this inner core three thin cylinders, and require very high to the axiality of these three thin cylinders, and in thin cylinder, also to offer shoulder hole, also chamfering is needed in the bottom of shoulder hole, thus just can make the parts in thin cylinder and thin cylinder perfect cooperation, as shown in Figure 1, the nominal diameter of ladder macropore 6 is 32mm, the nominal diameter of ladder aperture 7 is 26mm, and the tube wall of ladder macropore is very thin, traditional processing mode is then adopt milling cutter directly to carry out chamfering to ladder position, but because the length of ladder macropore is longer, therefore the knife bar grown is needed very much to process, after but knife bar is long, easily beat in the cutting end of cutter, thus cause chamfering precision inadequate, serious will destroy shoulder hole inwall, workpiece is caused to be scrapped, cause immeasurable loss.

Summary of the invention

The object of the invention is to the shortcoming overcoming prior art, provide simple, the easy to process and crudy of a kind of structure high for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth.

Object of the present invention is achieved through the following technical solutions: a kind of for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth, it comprises knife bar and cutter head, described cutter head is shaped in one end of knife bar, described cutter head is provided with multiple milling edge, described milling edge offers milling face on one end of knife bar, described milling face is 42 ° ~ 48 ° with the angle of knife bar axial line, between adjacent two milling edges, be provided with chip area, there is between the two side of described chip area angle a.

Described milling edge is eight, and is evenly distributed on circumferentially same.

The radial end face of described milling edge is arc surface, and eight arc surfaces are positioned at circumferentially same.

Described angle a is 73 ° ~ 75 °.

Described milling face is 45 ° with the angle of knife bar axial line.

The present invention has the following advantages: the T-shaped milling cutter of umbrella tooth of the present invention, is provided with multiple milling edge, thus the load of each milling edge is reduced, thus can reduce milling cutter beating in process, thus ensure that crudy; Between adjacent two milling edges, angled chip area is set, adds solid capacity, also improve the discharge efficiency of chip simultaneously, thus further improve crudy.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of cutter of the present invention workpiece to be processed;

Fig. 2 is schematic front view of the present invention;

Fig. 3 is that schematic diagram is looked on a left side of the present invention;

In figure, 1-knife bar, 2-cutter head, 3-milling edge, 4-milling face, 5-chip area, 6-ladder macropore, 7-ladder aperture.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention will be further described, and protection scope of the present invention is not limited to the following stated:

As shown in Figures 2 and 3, a kind of for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth, it comprises knife bar 1 and cutter head 2, described cutter head 2 is shaped in one end of knife bar 1, described cutter head 2 is provided with multiple milling edge 3, described milling edge 3 offers milling face 4 on one end of knife bar 1, described milling face 4 is 42 ° ~ 48 ° with the angle of knife bar 1 axial line, preferably, described milling face 4 is 45 ° with the angle of knife bar 1 axial line, chip area 5 is provided with between adjacent two milling edges 3, between the two side of described chip area 5, there is angle a, in the present embodiment, described angle a is 73 ° ~ 75 °, preferably, described angle a is 74 °, the angle a of 74 °, the intensity of cutter head can be ensured, fast iron filings can also be discharged simultaneously, thus improve the milling quality of milling cutter.

In the present embodiment, described milling edge 3 is eight, and is evenly distributed on circumferentially same, and further, the radial end face of described milling edge 3 is arc surface, and eight arc surfaces are positioned at circumferentially same.

The course of work of the present invention is as follows: penetrate in shoulder hole by the knife bar of T-shaped for umbrella tooth milling cutter, and knife bar is through ladder aperture, then knife bar is arranged on handle of a knife, then starting device, the T-shaped milling cutter of umbrella tooth does circular motion, thus by cutting face 4 by chamfering milling machine, the chip produced then is drained in ladder macropore by chip area, workpiece is taken out, vertical placement, chip can be discharged, in whole process, there is no the interference of chip, and the center of circle of circular arc that milling cutter is walked is on the axial line of shoulder hole, therefore not easily interfere, thus the inwall of shoulder hole can not be destroyed, also ensure that the quality of chamfering simultaneously.

Claims

1. one kind for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth, it is characterized in that: it comprises knife bar (1) and cutter head (2), described cutter head (2) is shaped in one end of knife bar (1), described cutter head (2) is provided with multiple milling edge (3), described milling edge (3) is upper offers milling face (4) on one end of knife bar (1), described milling face (4) is 42 ° ~ 48 ° with the angle of knife bar (1) axial line, chip area (5) is provided with between adjacent two milling edges (3), between the two side of described chip area (5), there is angle a.

2. one according to claim 1 is used for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth, it is characterized in that: described milling edge (3) is eight, and is evenly distributed on circumferentially same.

3. one according to claim 1 is used for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth, it is characterized in that: the radial end face of described milling edge (3) is arc surface, and eight arc surfaces are positioned at circumferentially same.

4. one according to claim 1 is used for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth, it is characterized in that: described angle a is 73 ° ~ 75 °.

5. one according to claim 1 is used for the T-shaped milling cutter of thin-walled shoulder hole chamfering umbrella tooth, it is characterized in that: described milling face (4) is 45 ° with the angle of knife bar (1) axial line.