CN201755679U

CN201755679U - Mechanically-clamped blade type counter bit

Info

Publication number: CN201755679U
Application number: CN2010202768183U
Authority: CN
Inventors: 刘剑; 缪佳兴; 孙盛丽
Original assignee: Harbin Turbine Co Ltd
Current assignee: Harbin Turbine Co Ltd
Priority date: 2010-07-30
Filing date: 2010-07-30
Publication date: 2011-03-09
Anticipated expiration: 2020-07-30

Abstract

The utility model relates to a counter bit, in particular to a mechanically-clamped blade type counter bit, which aims to solve the problems that the conventional counter bit can not be ground after being abraded, or is scrapped after tipping, so that the consumption cost of the tool is high. The mechanically-clamped blade type counter bit comprises a cutter arbor, a cutter blade and a positioning screw, wherein a threaded hole is formed in the axial direction in the center of one end of the cutter arbor; a penetrating mounting hole is formed on the outer wall of the cutter arbor; the threaded hole is communicated with the mounting hole; the cutter blade adopts a high-speed steel cutter blade; a positioning groove is formed at the bottom of the cutter blade; the cutter blade is mounted in the mounting hole and is in clearance fit with the mounting hole; the cutter arbor is mounted in the positioning groove; the bottom end surface of the mounting hole is propped against the bottom end surface of the positioning groove; the positioning screw is mounted in the threaded hole; and one end part of the positioning screw is in contact with the cutter blade. The mechanically-clamped blade type counter bit of the utility model is used for countersinking.

Description

A kind of clamped cutting bit chip counterbit

Technical field

The utility model relates to a kind of counterbit.

Background technology

Counterbit is the cutter commonly used of processing taper hole, former is common high-speed steel material with cutter, annual use amount is very big, the counterbit that uses at present is overall structure, because cutting output is very big, large scale taper hole particularly, blade abrasion is very fast, just scrap processing behind reconditioning or the tipping again behind the blade abrasion, the consumption costs of instrument is big.

The utility model content

The purpose of this utility model provides a kind of clamped cutting bit chip counterbit, just scraps processing, the problem that the consumption costs of instrument is big after solving after the existing counterbit wearing and tearing reconditioning again or tipping.

The utility model is to solve the problems of the technologies described above the technical scheme of taking to be: described counterbit comprises knife bar, blade and dog screw, the center of one end of knife bar has screwed hole vertically, have on the outer wall of knife bar perforation installing hole, screwed hole communicates with installing hole, blade is the high-speed steel blade, the bottom of blade has detent, described blade is contained in the installing hole, and the two matched in clearance, knife bar is contained in the detent, the bottom face of installing hole and the bottom face of detent offset, and described dog screw is contained in the screwed hole, and the end of dog screw contacts with blade.

The utlity model has following beneficial effect: the utility model solves cutter integral body and scraps situation because blade and knife bar removably connect, and the blade that only need more renew after the counterbit wearing and tearing are scrapped gets final product, and saves this cutter cost of use.

Description of drawings

Fig. 1 is a front view of the present utility model, and Fig. 2 is the front view of knife bar, and Fig. 3 is the vertical view of Fig. 2, and Fig. 4 is the front view of cutter head, and Fig. 5 is the vertical view of Fig. 4.

The specific embodiment

The specific embodiment one: present embodiment is described in conjunction with Fig. 1～Fig. 5, the counterbit of present embodiment comprises knife bar 1, blade 2 and dog screw 3, the center of one end of knife bar 1 has screwed hole 1-1 vertically, have on the outer wall of knife bar 1 perforation installing hole 1-2, screwed hole 1-1 communicates with installing hole 1-2, blade 2 is the high-speed steel blade, the bottom of blade 2 has detent 2-1, described blade 2 is contained in the installing hole 1-2, and the two matched in clearance, knife bar 1 are contained in the detent 2-1, and the bottom face of the bottom face of installing hole 1-2 and detent 2-1 offsets, described dog screw 3 is contained in the screwed hole 1-1, and the end of dog screw 3 contacts with blade 2.

The specific embodiment two: in conjunction with Fig. 4 present embodiment is described, the blade 2 of present embodiment is provided with twolip, the anterior angle γ of each sword in the blade 2 ₀Be 12 °, the relief angle α of each sword in the blade 2 ₀It is 8 °.Other compositions and annexation are identical with the specific embodiment one.

Claims

1. clamped cutting bit chip counterbit, described counterbit comprises knife bar (1), blade (2) and dog screw (3), the center that it is characterized in that an end of knife bar (1) has screwed hole (1-1) vertically, have on the outer wall of knife bar (1) perforation installing hole (1-2), screwed hole (1-1) communicates with installing hole (1-2), blade (2) is the high-speed steel blade, the bottom of blade (2) has detent (2-1), described blade (2) is contained in the installing hole (1-2), and the two matched in clearance, knife bar (1) is contained in the detent (2-1), the bottom face of the bottom face of installing hole (1-2) and detent (2-1) offsets, described dog screw (3) is contained in the screwed hole (1-1), and the end of dog screw (3) contacts with blade (2).

2. according to the described a kind of clamped cutting bit chip counterbit of claim 1, it is characterized in that described blade (2) is provided with twolip, the anterior angle (γ of each sword in the blade (2) ₀) be 12 °, the relief angle (α of each sword in the blade (2) ₀) be 8 °.