CN202155616U

CN202155616U - Internal thread cutter

Info

Publication number: CN202155616U
Application number: CN201120210807XU
Authority: CN
Inventors: 朱胜雷
Original assignee: Wuxi Yutian Precision Tool Co Ltd
Current assignee: Wuxi Yutian Precision Tool Co Ltd
Priority date: 2011-06-21
Filing date: 2011-06-21
Publication date: 2012-03-07
Anticipated expiration: 2021-06-21

Abstract

The utility model relates to an internal thread cutter which adopts an integrated structure comprising a cutter bit, a cutter rod and a cutter handle, wherein the cutter rod and the cutter handle have a cylinder structure; the diameter of the cutter rod is smaller than that of the cutter handle; a transition chamfer angle is arranged between the cutter rod and the cutter handle; the cutter bit is arranged at the end part of the cutter rod and has a half cylinder structure; a protruding cutting blade is arranged at the top end of the cutter bit; and the cutting blade comprises a front blade face, a main rear face, an auxiliary rear face and a tip angle. In the internal thread cutter, the cutter bit is relatively small, and the cutter rod is long and thin, so that the internal thread cutter is favorable for machining an internal thread of an inner hole with small diameter; a single-tooth thread cutter occupies small machining space and can remove chips smoothly; and the screw pitch between teeth of the single-tooth thread cutter is not constant, so that various internal threads with the screw pitch ranging from 0.2 to 10 millimeters can be machined, and the relief angle of the thread can be corrected according to a helix angle of the machining thread so as to ensure smooth cutting of the cutter.

Description

A kind of internal thread cutter

Technical field

The utility model relates to a kind of milling cutter, particularly a kind of internal thread cutter.

Background technology

Common screw cutter is whole hard alloy screw cutter and frame blade type screw cutter, has 5-7 serrated knife point screw thread, can process at one time screw thread.The general work flow of multiple tooth screw cutter is; Be covered with screw thread processing tooth on the cutting edge of screw cutter; Three-shaft linkage through Digit Control Machine Tool; Utilize formed threading tool to carry out the spiral interpolation and form screw thread, cutter is processed along helix can accomplish screw thread processing a week, also can rotate more and reach the screw thread requirement degree of depth several weeks.Its shortcoming is that it is many that multiple tooth screw cutter takies processing space, and chip removal has some setbacks; Cause the wearing and tearing of cutter easily, reduce the service life of cutter, also reduced the efficient of cutter machining screw simultaneously; In addition, this type of screwer is because head is too big, and the degree of depth is not enough; It is little to be inappropriate for the processing diameter, the internal thread that the degree of depth is big.

Summary of the invention

In order to overcome above-mentioned shortcoming, the purpose of the utility model is to provide a kind of cutter head less, and knife bar is thinner, is beneficial to the internal thread cutter of machining screw in the minor diameter endoporus.

The purpose of the utility model realizes through following technical scheme:

A kind of internal thread cutter, it is the integrative-structure that comprises cutter head, knife bar and handle of a knife, said knife bar, handle of a knife are column structure; The knife bar diameter is provided with the transition chamfering less than the handle of a knife diameter between knife bar and handle of a knife, said cutter head is arranged at the knife bar end; It is 1/2 column structure, and the cutter head top is provided with an outstanding cutting edge, and said cutting edge comprises a lip surface; One major flank, a minor flank and a blade tip angle.

Further, the blade tip angle angle of said cutting edge is set to 60 degree, and its blade tip is a circular arc, and said arc radius is 0.05mm.

The beneficial effect of the utility model does

Cutter head is less, and knife bar is elongated, is beneficial to the internal thread machining of minor diameter endoporus;

It is few that the monodentate screwer takies processing space, and chip removal is smooth and easy;

Monodentate screwer between cog pitch is fixing, can process from 0.2mm to 10mm more than the internal thread of various pitch, the relief angle according to the lead angle correction screw thread of machining screw guarantees that Tool in Cutting is smooth.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model.

Fig. 2 is the partial enlarged drawing of the utility model cutter head.

Fig. 3 is the utility model blade tip angle sketch map.

The specific embodiment

By Fig. 1, shown in Figure 2:

A kind of internal thread cutter of the utility model comprises cutter head 1, knife bar 2 and handle of a knife 3, and said cutter head 1, knife bar 2 and the handle of a knife 3 of comprising is set to one, and knife bar 2 is a column structure with handle of a knife 3, connects with the transition chamfering between the two;

Said cutter head 1 is arranged at knife bar 2 ends, and it is 1/2 column structure, and other 1/2 vacancy of its cylinder partly is set to the chip area of this internal thread cutter; The cutter head top is provided with an outstanding cutting edge; It comprises a lip surface 1-1, a major flank 1-2, a minor flank 1-3 and a blade tip angle 1-4.

One preferred version of the utility model is as shown in Figure 3:

The internal thread cutter of this preferred version, the blade tip angle angle of its cutting edge are 60 degree, and its point of a knife is a circular arc, and blade tip bursts apart when preventing cutting operation, and said arc radius is 0.05mm.

Claims

1. an internal thread cutter is characterized in that, it is the integrative-structure that comprises cutter head (1), knife bar (2) and handle of a knife (3); Said knife bar (2), handle of a knife (3) are column structure, and the knife bar diameter is provided with the transition chamfering less than the handle of a knife diameter between knife bar (2) and handle of a knife (3); Said cutter head (1) is arranged at knife bar (2) end; It is 1/2 column structure, and the cutter head top is provided with an outstanding cutting edge, and said cutting edge comprises a lip surface (1-1); One major flank (1-2), a minor flank (1-3) and a blade tip angle (1-4).

2. a kind of internal thread cutter according to claim 1 is characterized in that, the blade tip angle angle of said cutting edge is set to 60 degree, and its blade tip is a circular arc, and said arc radius is 0.05mm.