CN209902332U

CN209902332U - Improved structure of double right-handed milling cutter

Info

Publication number: CN209902332U
Application number: CN201920498664.3U
Authority: CN
Inventors: 魏祥源; 周文俊; 李生乐; 黄清江
Original assignee: Xiamen Honglu Lianchang Tools Co Ltd
Current assignee: Xiamen Honglu Lianchang Tools Co Ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-01-07
Anticipated expiration: 2029-04-12

Abstract

The utility model discloses an improved structure of a double right-handed milling cutter, which comprises a cutting edge and a plurality of chip breakers, wherein the plurality of chip breakers are arranged on the cutting edge at intervals; the plurality of chip breakers consist of a plurality of middle front chip breakers and a plurality of rear chip breakers; the connecting lines of the groove bottoms of the plurality of middle front chip breakers are middle front oblique lines, and the included angle between the middle front oblique lines and the axis is an angle a; the connecting lines of the groove bottoms of the rear chip breakers are rear oblique lines, the included angle between each rear oblique line and the axis is an angle b, and the angle b is larger than the angle a. Because the utility model discloses increase one section tapering control, realize under the circumstances of guaranteeing the effective sword length of cutter that dextrorotation links to each other with two sword length in the right side final phase of a project department, improve the cutter performance through the depth of cut of changing short dextrorotation length and two sword final phase of a project departments in the right side, test cutter life through the customer end and improved more than 30%.

Description

Improved structure of double right-handed milling cutter

Technical Field

The utility model relates to a cutter especially relates to a two right-handed milling cutter's improvement structure.

Background

FIG. 1 shows a knife-shaped part of a product processed by a conventional process

(1) A blade A: a cutting site;

(2) a chip breaker groove B: the intermittent cutting edges break the chips milled by the milling cutter, so that the chips can be conveniently discharged;

(3) d, ending the right-handed C: the tail of the right-handed grinding wheel is also called as the neck of a milling cutter, and the neck is a stress concentration point during milling of the milling cutter, and when the blade of the milling cutter is stressed excessively or is milled to the service life of the cutter, the position of the broken cutter is concentrated on the point, so that the rigidity protection of the point is very important:

the prior art has the following problems:

the right two-edge A tail can only be received at the front end of the right-hand tail, but the edge length of the milling cutter is shorter than that required by a customer. The method for increasing the edge length comprises 2 methods:

(1) one method is to increase the length of right-handed rotation, even if the tail of the right-handed rotation C moves towards the rear end of the cutter, the right two blades A can be continuously lengthened to meet the blade length requirement of a customer, but the increase of the length of the right-handed rotation C can reduce the integral rigidity of the cutting edge of the milling cutter and increase the probability of cutter breakage;

(2) another method is to increase the length of the right two-blade a directly, because the depth of the ending position of the right-hand blade C is shallower than the depth of the front end of the right-hand blade C, as shown in fig. 2, if the length of the right two-blade a ' is continuously increased, the groove bottom D ' ending of the right-hand blade C ' is ground during the processing of the right two-blade a ', which is called as "neck winding", so that the core thickness at the ending position of the right-hand blade C ' is reduced, and in addition to the stress concentration defect, the service life of the milling cutter is reduced, and the probability of cutter breakage is increased.

As shown in fig. 3, the right two edges 1 'have only one taper, that is, the flute bottom 21' of the chip breaker 2 'is located on a straight line Q, and the depth of the flute bottom 21' is consistent, so that the flute bottom interferes with the right-hand rotation to form a neck.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a long service life's two right-handed milling cutter's improvement structure.

In order to achieve the above object, the technical solution of the present invention is:

the utility model relates to an improved structure of a double right-handed milling cutter, which comprises a cutting edge and a plurality of chip breakers, wherein the plurality of chip breakers are arranged on the cutting edge at intervals; the plurality of chip breakers consist of a plurality of middle front chip breakers and a plurality of rear chip breakers; the connecting lines of the groove bottoms of the plurality of middle front chip breakers are middle front oblique lines, and the included angle between the middle front oblique lines and the axis is an angle a; the connecting lines of the groove bottoms of the rear chip breakers are rear oblique lines, the included angle between each rear oblique line and the axis is an angle b, and the angle b is larger than the angle a.

After adopting above-mentioned scheme, owing to will satisfy customer's sword length demand on the basis that does not influence milling cutter performance, just must make two sword extensions on the right side, do not influence the length and the dextrorotation ending of dextrorotation simultaneously, for this reason, the utility model discloses a change equipment procedure increases one section tapering control again, makes the chip breaker ditch bottom of the groove degree of depth of being close to dextrorotation ending department shallower, and this section ditch bottom line is oblique line X, realizes that dextrorotation links to each other with two sword length ending departments on the right side under the circumstances of guaranteeing the effective sword length of cutter, improves the cutter performance through the depth of cut of changing short dextrorotation length and two sword ending departments on the right side, has improved more than 30% through customer end test cutter life. And simultaneously, the utility model discloses the tapering technology of two segmentations has still been developed, and this technology mainly improves the point and lies in can letting two blades on the right side be about to process to the dextrorotation end position time, the degree of depth shallowly to continue processing, realize two blade length extensions on the right side, can not grind the ditch end of dextrorotation end simultaneously.

The invention will be further described with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural view of a conventional milling cutter;

FIG. 2 is a schematic view of an improved conventional milling cutter;

fig. 3 is a sectional view of a conventional milling cutter;

fig. 4 is a schematic structural diagram of the present invention;

fig. 5 is a cross-sectional view of the present invention.

Detailed Description

As shown in fig. 4 and 5, the present invention relates to an improved structure of a double right-hand milling cutter, which comprises a cutting edge 1 and a plurality of chip breakers 2. A plurality of chip breakers 2 are arranged at intervals on the blade 1.

The plurality of chip breakers 2 are composed of a plurality of middle front chip breakers 21 and a plurality of rear chip breakers 22 (close to the right-handed ending part); the connecting line of the groove bottoms of the plurality of middle front chip breakers 21 is a middle front inclined line 211, and the included angle between the middle front inclined line 211 and the axis Z is an angle a, which is smaller; the connecting line of the groove bottoms of the rear chip breakers 22 (close to the right-handed ending part) is a rear inclined line 221, the included angle between the rear inclined line 221 and the axis Z is an angle b, and the angle b is larger than the angle a, so that the groove bottom taper of the two sections of chip breakers 2 is formed, namely, the groove bottoms of the rear chip breakers 22 (close to the right-handed ending part) are shallow in depth, and the groove bottoms of the middle-front chip breakers 21 are deep.

The utility model discloses two right-handed milling cutter's processing technology, including following step:

step (1), molding: grinding the raw material blade part to process into a forming rod with the diameter of the blade of the finished product;

step (2), right-handed rotation processing: machining a cutting edge of the milling cutter from the front end to the rear end of the milling cutter to enable the milling cutter to have a cutting function;

step (3), processing a right double-edge, namely processing a chip breaker of the milling cutter from the front end to the rear end of the milling cutter to enable the milling cutter to have a chip breaker function; in the step (3), when the right two blades are about to be machined to the right-hand ending position, the depth is reduced, machining is continued, the length of the right two blades is lengthened, and the groove bottom at the right-hand ending position cannot be ground.

The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited thereby, and all equivalent changes and modifications made within the scope of the claims and the specification should be considered within the scope of the present invention.

Claims

1. An improved structure of a double right-handed milling cutter comprises a cutting edge and a plurality of chip breakers, wherein the cutting edge is provided with a plurality of chip breakers at intervals; the method is characterized in that: the plurality of chip breakers consist of a plurality of middle front chip breakers and a plurality of rear chip breakers; the connecting lines of the groove bottoms of the plurality of middle front chip breakers are middle front oblique lines, and the included angle between the middle front oblique lines and the axis is an angle a; the connecting lines of the groove bottoms of the rear chip breakers are rear oblique lines, the included angle between each rear oblique line and the axis is an angle b, and the angle b is larger than the angle a.