CN201211574Y

CN201211574Y - Composite blade root milling cutter

Info

Publication number: CN201211574Y
Application number: CNU2008200903516U
Authority: CN
Inventors: 杜佩芳; 韩勤刚; 王平
Original assignee: Harbin No 1 Tool Manufacture Corp Ltd Silaote Cutter Co Ltd
Current assignee: Harbin No 1 Tool Manufacture Corp Ltd Silaote Cutter Co Ltd
Priority date: 2008-07-02
Filing date: 2008-07-02
Publication date: 2009-03-25
Anticipated expiration: 2018-07-02

Abstract

The utility model discloses a combined blade-root milling cutter, which comprises two milling cutters, wherein the end faces of the two milling cutters are in contact with each other to form a whole; adjacent two-teeth chip breaking grooves are axially staggered and are in the shape of a Christmas tree; an inner hole is provided with double keyways namely a using keyway and a processing keyway; a convex-concave dislocation groove is divided into 3 to 6 equal parts in the circumferential direction; the tooth forms of the milling cutters partially overlap; and the tooth form of an edge part is in the shape of a Christmas tree. The combined blade-root milling cutter has the advantages that the cutter has good vibration reduction property and raises cutting amount; the front edge surface of a tool can be staggered along the keyways so as to reduce cutting length; the tool is not easy to produce vibration, thereby improving the surface roughness of workpieces; the design of the inner-hole double keyways, the convex-concave dislocation groove divided into 3 to 6 equal parts and the combined connected end faces ensures that the tool after combination can not break when cutting molded lines and the tooth forms partially overlap, so as to ensure that a processed curved surface is a smooth continuous surface with no tool marks; and the cutter after use is convenient to grind, can be repeatedly ground, and is long in life span.

Description

Combination blade root milling cutter

Technical field

The utility model relates to a kind of milling cutter, is a kind of combination blade root milling cutter specifically.

Background technology

At present, the blade root milling cutter of China's steam turbine industry processing blade root slot is the disc milling cutter of straight flute, 0 ° of anterior angle on the market, relatively large blade root slot penetration of a cutting tool is dark, the cutting face width, require high especially to the cutter cutting ability, when this Christmas, tree-shaped integral disc shape milling cutter was applied in large-scale blade root slot such as last utmost point blade, last utmost point linear leaf, its stable cutting, aspects such as cutting ability and efficient and durability all can not satisfy the processing request of product, its ability that suppresses flutter is lower, will produce vibration when feed is big, can not normally cuts, influence is produced.

Summary of the invention

The purpose of this utility model is to overcome the weak point that exists in the above-mentioned technology, the combination blade root milling cutter that operating efficiency, dimensional accuracy, the suface processing quality that provides a kind of root that is fit to come into leaves to use all improves a lot.

In order to achieve the above object, the technical solution adopted in the utility model is: comprise milling cutter, the end face of milling cutter contacts with each other and is one, adjacent two tooth chip-breakers axially stagger, and to be Christmas tree-shaped, endoporus has two keyways promptly to use keyway and processing keyway, convex-concave dislocation groove is circumferential 3～6 five equilibriums, and the profile of tooth of milling cutter has overlapping, and the profile of tooth of blade is that Christmas is tree-like.

The utility model has the advantages that:

1, vibration damping is good: because blade is discontinuous, cut workpiece easily, again because of the increase of thickness of cutting, reduce the sliding phenomenon of blade on surface of the work, thereby improved the ability that suppresses flutter;

2, improve cutting data: toothed surfaces is staggered shovels out chip-breaker, and axially staggering in the chip-breaker position, can reduce chip deformation, thereby reduce cutting force and heat in metal cutting, also helps chip removal, increases substantially feed engagement;

3, the lip surface of cutter can stagger along keyway, reduces length of cut, and cutter is difficult for producing vibration;

4, improved workpiece surface roughness, the two keyways of endoporus, the phase contact surface design of combination such as groove such as dislocation such as 3～6 convex-concaves such as branch such as grade makes the continuous sword of this cutter combination back cutting molded lines, profile of tooth has overlapping, thereby guarantee that processing curve is a continuous face of slyness, do not have tool marks, use the back reconditioning convenient, reconditioning repeatedly, cutter life is long.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the left-hand schematic diagram of milling cutter 1;

Fig. 3 is the dextrad schematic diagram of milling cutter 2.

The specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

By Fig. 1-Fig. 3 as can be known, the utility model comprises milling cutter 1,2, it is characterized in that: the end face 7 of milling cutter 1,2 contacts with each other and is one, adjacent two tooth chip-breakers 5 axially stagger, and to be Christmas tree-shaped, endoporus has two keyways promptly to use keyway 3 and processing keyway 8, convex-concave dislocation groove 6 is circumferential 3～6 five equilibriums, and the profile of tooth of milling cutter 1,2 has overlapping, and the profile of tooth of blade 4 is that Christmas is tree-like.

Described milling cutter 1,2 anterior angles are 5～10 °, and chip-breaker 5 has relief angle, and its position axis is to staggering.

End face 7 is the phase contact surface of milling cutter 1,2, and this end face 7 is 0.01 with the squareness tolerance at endoporus center.

The profile of tooth of blade 4 is that Christmas is tree-like, and the profile of tooth tolerance is 0.02.The run-out tolerance of all diameters is 0.0127 on total length.Version key of the present utility model is seen Fig. 2 at convex-concave dislocation groove 6, and promptly the anterior angle of milling cutter 1 is 5～10 °.During use, lip surface can make blade discontinuous along using keyway 3 and convex-concave dislocation groove 6 to stagger, and helps cutting.Can be with 1,2 two cutter front edges combinations of milling cutter at grade when processing and manufacturing and reconditioning along processing keyway 8 and convex-concave dislocation groove 6, processing, reconditioning are very convenient.Christmas, tree-like toothed surfaces had staggered chip-breaker 5, and relief angle is an Archimedes spiral.The profile of tooth of processing back workpiece is that Christmas is tree-shaped.

Claims

1. one kind is made up the blade root milling cutter, comprise milling cutter (1), (2), it is characterized in that: the end face (7) of milling cutter (1), (2) contacts with each other and is one, adjacent two tooth chip-breakers (5) axially stagger, and to be Christmas tree-shaped, endoporus has two keyways promptly to use keyway (3) and processing keyway (8), convex-concave dislocation groove (6) is circumferential 3～6 five equilibriums, and the profile of tooth of milling cutter (1), (2) has overlapping, and the profile of tooth of blade (4) is that Christmas is tree-like.

2. combination blade root milling cutter according to claim 1 is characterized in that: described milling cutter (1), (2) anterior angle are 5～10 °, and chip-breaker (5) has relief angle, and its position axis is to staggering.