CN202106077U

CN202106077U - Inner cooled R (round bladed) milling cutter with turning blades

Info

Publication number: CN202106077U
Application number: CN2011201953425U
Authority: CN
Inventors: 孙盛丽; 魏成双; 魏崇巍
Original assignee: Harbin Turbine Co Ltd
Current assignee: Harbin Turbine Co Ltd
Priority date: 2011-06-10
Filing date: 2011-06-10
Publication date: 2012-01-11
Anticipated expiration: 2021-06-10

Abstract

An inner cooled R (round bladed) milling cutter with turning blades relates to a milling cutter for machining of surfaced layers of cylinders and mainly solves the problems of low machining efficiency, short service life and poor surface machining quality of the existing milling cutter for surfaced layers of cylinders. Each of the blades (2) of the inner cooled R milling cutter is a round blade, the diameter (phi) of each round blade is 6mm, the front angle (gamma) of each round blade is 3 degrees, the rear angle (delta) of each round blade is 11 degrees, a cutter body (1) is provided with a main cooling hole (1-2) axially arranged along the cutter body (1), the cutter body (1) is further provided with four inner cooled type secondary cooling holes (1-3), one end of each inner cooled type secondary cooling hole (1-3) is communicated with the main cooling hole (1-2), and the other end of each inner cooled type secondary cooling hole (1-3) aligns to the a front blade face of the a corresponding blade groove (1-1). The inner cooled R milling cutter is used for machining surfaced layers of cylinders.

Description

A kind of clamped cutting bit sheet inner-cooled R milling cutter

Technical field

The utility model relates to a kind of milling cutter that the cylinder overlay cladding is used of processing, and is specifically related to a kind of clamped cutting bit sheet inner-cooled R milling cutter, belongs to the Machining Technology field.

Background technology

1,000,000 nuclear power generating sets are important steam turbine units, and the casing split place of this unit is designed to weld the heat-resisting alloy structure, and the overlay cladding degree of depth of this cylinder is 3-5mm; Root is the R3 fillet, during owing to the processing overlay cladding, has only the little cutting-in of 3-5mm; Add the corner wear in man-hour and be exceedingly fast, the former high-speed steel slotting cutter that uses cutter as nose angle R3, this milling cutter not only working (machining) efficiency is low; Service life is short; And machined surface quality is also not ideal enough, needs the cutter of development new structure type, efficient and high-quality processing cylinder overlay cladding.

The utility model content

The purpose of the utility model is that the working (machining) efficiency that milling cutter that existing processing cylinder overlay cladding uses exists is low, service life short and the problem of machined surface quality difference in order to solve, and then a kind of clamped cutting bit sheet inner-cooled R milling cutter is provided.

The technical scheme of the utility model is: a kind of clamped cutting bit sheet inner-cooled R milling cutter comprises cutter hub, four blades and four holding screws; Said cutter hub is four toothing cutter hubs; Be processed with four insert grooves on the cutter hub, each blade is fixedly mounted in the corresponding insert groove through a holding screw; Blade is a circular knife, and the diameter of circular knife is 6mm, and the anterior angle of circular knife is 3 °; The relief angle of circular knife is 11 °; Have main cooling holes on the said cutter hub, main cooling holes is offered along the axis direction of cutter hub, also has four inner-cooled branch cooling holes on the said cutter hub; Each inner-cooled divides an end of cooling holes to be communicated with main cooling holes, and the other end of each inner-cooled branch cooling holes aligns the rake face of respective blade groove.

The utility model compared with prior art has following effect: the clamped cutting bit sheet inner-cooled R milling cutter working (machining) efficiency of the utility model is high; And owing to adopt inner-cooled to divide cooling holes; Cooling effect promotes greatly; Not only improved cutter life, but also improved the crudy of cylinder overlay cladding; In addition, the clamped cutting bit sheet inner-cooled R milling cutter of the utility model, when blade abrasion was scrapped, the blade that only need more renew got final product, and has avoided the integral body of cutter to scrap, and has practiced thrift a large amount of cutter costs of use.

Description of drawings

Fig. 1 is the overall structure front view of the clamped cutting bit sheet inner-cooled R milling cutter of the utility model, and Fig. 2 is the left view of Fig. 1, and Fig. 3 is the front view of cutter hub 1; Fig. 4 is the A-A cutaway view of Fig. 3; Fig. 5 is the main cutaway view of Fig. 3, and Fig. 6 is the main cutaway view of blade 2, and Fig. 7 is the right view of Fig. 6.

The specific embodiment

The specific embodiment one: combine Fig. 1-Fig. 7 that this embodiment is described; A kind of clamped cutting bit sheet inner-cooled R milling cutter of this embodiment comprises cutter hub 1, four blades 2 and four holding screws 3; Said cutter hub 1 is four toothing cutter hubs; Be processed with four insert groove 1-1 on the cutter hub 1, each blade 2 is fixedly mounted in the corresponding insert groove 1-1 through a holding screw 3; Blade 2 is a circular knife, and the diameter of phi of circular knife is 6mm, and the anterior angle γ of circular knife is 3 °; The relief angle δ of circular knife is 11 °; Have main cooling holes 1-2 on the said cutter hub 1, main cooling holes 1-2 offers along the axis direction of cutter hub 1, also has four inner-cooled branch cooling holes 1-3 on the said cutter hub 1; Each inner-cooled divides the end of cooling holes 1-3 to be communicated with main cooling holes 1-2, and the other end of each inner-cooled branch cooling holes 1-3 aligns the rake face of respective blade groove 1-1.

The specific embodiment two: combine Fig. 6 and Fig. 7 that this embodiment is described, the blade 2 of this embodiment is a carbide chip.So be provided with, working (machining) efficiency is higher, longer service life.Other composition is identical with the specific embodiment one with annexation.

The specific embodiment three: combine Fig. 4 that this embodiment is described, the relief angle δ 1 of the insert groove 1-1 of this embodiment is 11 °.So be provided with, guaranteed the installation accuracy of blade.Other composition is identical with the specific embodiment one or two with annexation.

Claims

1. clamped cutting bit sheet inner-cooled R milling cutter; It comprises cutter hub (1), four blades (2) and four holding screws (3); Said cutter hub (1) is four toothing cutter hubs; Be processed with four insert grooves (1-1) on the cutter hub (1), each blade (2) is fixedly mounted in the corresponding insert groove (1-1) through a holding screw (3); It is characterized in that: blade (2) is a circular knife; The diameter of circular knife (Φ) is 6mm; The anterior angle of circular knife (γ) is 3 °, and the relief angle of circular knife (δ) is 11 °, has main cooling holes (1-2) on the said cutter hub (1); Main cooling holes (1-2) is offered along the axis direction of cutter hub (1); Also have four inner-cooled branch cooling holes (1-3) on the said cutter hub (1), each inner-cooled divides an end of cooling holes (1-3) to be communicated with main cooling holes (1-2), and the other end of each inner-cooled branch cooling holes (1-3) aligns the rake face of respective blade groove (1-1).

2. a kind of clamped cutting bit sheet inner-cooled R milling cutter according to claim 1, it is characterized in that: blade (2) is a carbide chip.

3. a kind of clamped cutting bit sheet inner-cooled R milling cutter according to claim 1 and 2, it is characterized in that: the relief angle of insert groove (1-1) (δ 1) is 11 °.