CN212704620U

CN212704620U - High-speed milling cutter

Info

Publication number: CN212704620U
Application number: CN202021395886.1U
Authority: CN
Inventors: 张万洪; 成坚; 于庆军
Original assignee: Beijing Maikesi Cutting Tool Co ltd
Current assignee: Beijing Maikesi Cutting Tool Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-03-16
Anticipated expiration: 2030-07-15

Abstract

The application relates to a high-speed milling cutter, relates to the technical field of milling cutters and aims to solve the technical problem that chips are not smoothly discharged when the milling cutter works; the cutter comprises a cutter body, wherein one end of the cutter body is fixedly connected with a cutter handle, the cutter body comprises a cylindrical cutter core and an edge lobe arranged on the peripheral surface of the cutter core, and the edge lobe comprises a bottom edge and a peripheral edge; the blade lobes are at least provided with two and are evenly distributed on the circumferential direction of the cutter core; the adjacent knife cores are provided with chip guide grooves, the chip guide grooves extend spirally along the circumferential surface of the knife core, the spiral angle is 40-45 degrees, and the bottom surfaces of the chip guide grooves are smooth curved surfaces. This application has the effect that the slag bits that will mill are convenient for discharge.

Description

High-speed milling cutter

Technical Field

The application relates to the technical field of milling cutters, in particular to a high-speed milling cutter.

Background

A common machining method in machining at high speed cutting. The method is widely applied to the fields of part processing, automobile manufacturing, aerospace and the like, and obtains great economic benefits.

A milling cutter is a cutting tool generally used in a milling machine or a machining machine to perform a milling operation, and when the milling cutter is operated, the milling machine drives the milling cutter to rotate around its own axis at a high speed, so as to mill a profile by using cutting edges provided around the milling cutter.

The milling cutter can generate a large amount of slag scraps when in work, and the slag scraps are easily clamped at the front angle of the cutting edge of the cutter and are not easy to discharge.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-speed milling cutter to the not enough that prior art exists, the effect that the slag bits that it has to be convenient for will mill are discharged.

The application provides a high-speed milling cutter adopts following technical scheme:

a high-speed milling cutter comprises a cutter body, wherein one end of the cutter body is fixedly connected with a cutter handle, the cutter body comprises a cylindrical cutter core and cutting edges arranged on the peripheral surface of the cutter core, and the cutting edges comprise a bottom edge and a peripheral edge; the blade lobes are at least provided with two and are evenly distributed on the circumferential direction of the cutter core; the adjacent knife cores are provided with chip guide grooves, the chip guide grooves extend spirally along the circumferential surface of the knife core, the spiral angle is 40-45 degrees, and the bottom surfaces of the chip guide grooves are smooth curved surfaces.

By adopting the technical scheme, when the milling cutter performs milling operation, the chip flow milled by the milling cutter is spirally lifted and discharges the waste chips after being guided by the chip guide grooves, the spiral angle of the chip guide grooves is limited, and the peripheral edge can perform oblique edge cutting while the waste chip discharge efficiency is improved, so that the actual front angle is increased, and the cutting efficiency and the cutting stability are improved.

Preferably, the four cutting edges are uniformly distributed on the circumferential surface of the cutter body, and the four cutting edges are corresponding to the four chip guide grooves and uniformly distributed along the circumferential direction of the cutter body.

Through adopting above-mentioned technical scheme, the setting of four cutting edges for every time the milling cutter rotates, can mill the quartic to the work piece, thereby improved milling cutter's milling speed and make the milling cutter more even to the vibration when the work piece mills, reduced the condition emergence of milling face burr and cockscomb structure cutting line, thereby improved and milled efficiency and milled the quality.

Preferably, the chip guide groove is deviated towards one end of the cutter handle along the direction far away from the axial direction of the cutter core.

By adopting the technical scheme, after the milled waste chips rise in the chip guide groove along with the rotation of the milling cutter and are far away from the milling area, the bottom wall of the chip guide groove close to the cutter handle extends along the direction far away from the axis, so that the waste chips are guided, the waste chips fly out along the direction far away from the milling cutter, and the condition that the waste chips are accumulated at the end part of the chip guide groove is reduced. The stability of milling cutter during operation has been improved.

Preferably, the rake angle of the peripheral edge is 8 to 10 degrees.

By adopting the technical scheme, the peripheral edge of the milling cutter has certain strength while keeping sharpness, so that the cutting efficiency of the peripheral edge is improved, meanwhile, the peripheral edge has small influence on the deformation of the metal of a cutting layer when in working, and when a chip flow passes through the chip guide groove, the friction force between the chip flow and the chip guide groove is reduced, so that the cutting heat generated when the milling cutter works is reduced, and the milling cutter is convenient to work for a long time.

Preferably, the radius of the knife core is not less than the distance between the cutting edge of the peripheral edge and the peripheral surface of the knife core.

By adopting the technical scheme, the cutter core has enough strength due to the limitation of the diameter of the cutter core, so that the milling speed of the milling cutter can be increased to 14-20m per minute during working, and the milling efficiency and the stability of the milling work are greatly improved.

Preferably, the thickness of the blade lobe is 0.2 to 0.3 times the diameter of the knife core.

Through adopting above-mentioned technical scheme, guaranteed the thickness of land when the width of increase chip groove, the bulk strength of land can improve, and then the land can keep sufficient stability when high-speed cutting, has reduced because the circumstances that the peripheral edge vibrations lead to influencing the milling effect, has improved milling cutter job stabilization nature.

Preferably, the relief angle of the peripheral edge is 12 to 14 degrees.

Through adopting above-mentioned technical scheme, the thickness of week sword blade department has been confirmed in the cooperation jointly of relief angle and anterior angle to guarantee the cutting strength of week sword, and reduced the frictional force between back knife face and the work piece, thereby further reduced the frictional heat of milling cutter during operation, improved the stability of milling cutter work.

Preferably, the outer side of the cutter body is coated with a heat insulation protective film.

By adopting the technical scheme, the heat insulation protective film has higher oxidation temperature and hardness, so that the cutting tool can be insulated and protected, the durability of the milling cutter is improved, the surface of the heat insulation protective film is smooth, the friction force between the chip guide groove and slag chips can be reduced, and the chip discharge of the chip guide groove is facilitated.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the chip discharging efficiency of the milling cutter during working is improved, the slag chips can be discharged out of a milling area through the chip guide groove by the spiral chip guide groove, and the chip discharging efficiency is improved while the milling efficiency of the milling cutter is improved due to the limitation of the spiral angle;

2. the overall strength of the milling cutter is improved, the strength and the wear resistance of the milling cutter are enhanced through the arrangement of the heat insulation coating, the surface of the milling cutter is smoother, and the discharge efficiency of slag chips is further improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a high-speed milling cutter;

fig. 2 is a cross-sectional view at the body of the high-speed milling cutter.

In the figure, 1, a cutter body; 11. a cutter core; 12. a land; 121. a peripheral edge; 122. a bottom edge; 13. a chip guide groove; 2. a knife handle; 21. a straight groove.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

Referring to fig. 1, for the high-speed milling cutter disclosed by the present application, the high-speed milling cutter comprises a cutter body 1 and a cutter handle 2 arranged at one end of the cutter body 1, the cutter handle 2 and the cutter body 1 are integrally formed, the cutter body 1 comprises a cylindrical cutter core 11 and four cutting edges 12 arranged on the circumferential surface of the cutter core 11, the cutting edges 12 comprise a circumferential edge 121 arranged on the circumferential surface of the cutter core 11 and a bottom edge 122 arranged at the end part of the cutter core 11, and the cutting edges 12 and the cutter core 11 are integrally formed. A chip guide groove 13 is arranged between the adjacent blade lobes 12. The cutter handle 2 is cylindrical and is coaxial with the cutter core 11, and a straight groove 21 used for being fixed with a milling machine fixture is further formed in the circumferential surface of the cutter handle 2.

The four cutting edges 12 are arranged, so that the workpiece can be milled four times when the milling cutter rotates once, the milling speed of the milling cutter is increased, vibration generated when the milling cutter mills the workpiece is more uniform, burrs and sawtooth-shaped cutting lines of a milling surface are reduced, and the milling efficiency and the milling quality are improved.

The cutter handle 2 and the cutter body 1 both adopt ultrafine particle tungsten carbide cobalt alloy, and the alloy has the characteristics of wear resistance, high temperature resistance, high strength and the like, so that the milling cutter can endure the severe environment of high speed and high temperature during cutting. The cutter body 1 is also coated with a heat insulation protective film, the heat insulation protective film in the embodiment adopts a titanium nitride nano coating, the thickness of the coating is 2-4 microns, and the heat insulation protective film has higher oxidation temperature and hardness, so that the cutting tool can be subjected to heat insulation and protection, the durability of the milling cutter is improved, in addition, the surface of the heat insulation protective film is smooth, the friction force between the chip guide groove 13 and slag chips can be reduced, and the chip discharge of the chip guide groove 13 is facilitated.

The chip guide grooves 13 are spirally arranged on the circumferential surface of the cutter core 11, the spiral angle of the chip guide grooves 13 is 40-45 degrees, the bottom surfaces of the chip guide grooves 13 are smooth curved surfaces, when the milling cutter performs milling operation, chip flow milled by the milling cutter is spirally lifted after being guided by the chip guide grooves 13 and discharges waste chips, the spiral angle of the chip guide grooves 13 is limited, the waste chip discharge efficiency is improved, and meanwhile, the circumferential edge 121 can perform oblique edge cutting, so that the actual front angle is increased, the cutting efficiency is improved, and the cutting stability is improved.

One end of chip guide groove 13 far away from bottom edge 122 extends to handle 2, and the bottom wall of chip guide groove 13 facing handle 2 is flush with the peripheral surface of handle 2. When the milled waste chips rise in the chip guide groove 13 along with the rotation of the milling cutter and are far away from a milling area, the bottom wall of the chip guide groove 13 close to the cutter handle 2 extends along the direction far away from the axis, so that the waste chips are guided, the waste chips fly out along the direction far away from the milling cutter, and the situation that the waste chips are accumulated at the end part of the chip guide groove 13 is reduced. The stability of milling cutter during operation has been improved.

The diameter D1 of the cutter core 11 is equal to the distance D2 from the cutting edge of the peripheral edge 121 to the peripheral surface of the cutter core 11, so that the cutter core 11 has enough strength, the milling speed of the milling cutter can be increased to 14-20 m/min during operation, and the milling efficiency and the stability of the milling operation are greatly improved. The thickness D3 of the cutting edge 12 is 0.1-0.15 times of the diameter D1 of the cutter core 11, so that the width of a chip groove is increased, the thickness of the cutting edge 12 is guaranteed, the overall strength of the cutting edge 12 is improved, the cutting edge 12 can keep sufficient stability during high-speed cutting, the condition that the milling effect is influenced due to the vibration of the peripheral edge 121 is reduced, and the working stability of the milling cutter is improved.

The rake angle β 1 of the cutting edge of the peripheral edge 121 is set to 8 to 10 degrees, so that the peripheral edge 121 of the milling cutter has a certain strength while keeping sharpness, thereby improving the cutting efficiency of the peripheral edge 121, and meanwhile, when the peripheral edge 121 operates, the peripheral edge has little influence on the deformation of the cutting layer metal, and when a chip flows through the chip guide groove 13, the frictional force with the chip guide groove 13 becomes small, thereby reducing the cutting heat generated when the milling cutter operates, and facilitating the long-time operation of the milling cutter. The clearance angle beta 2 of the cutting edge of the peripheral edge 121 is set to 12-14 degrees, and the thickness of the cutting edge of the peripheral edge 121 is determined by the cooperation of the clearance angle and the rake angle, so that the cutting strength of the peripheral edge 121 is ensured, the friction force between a rear cutter face and a workpiece is reduced, the friction heat during the operation of the milling cutter is further reduced, and the stability of the operation of the milling cutter is improved.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a high-speed milling cutter, includes cutter body (1), and the one end rigid coupling of cutter body (1) has a handle of a knife (2), its characterized in that: the cutter body (1) comprises a cylindrical cutter core (11) and a blade (12) arranged on the peripheral surface of the cutter core (11), wherein the blade (12) comprises a bottom edge (122) and a peripheral edge (121); the blade lobes (12) are at least provided with two and evenly distributed on the circumferential direction of the cutter core (11); the adjacent cutter cores (11) are provided with chip guide grooves (13), the chip guide grooves (13) extend spirally along the circumferential surface of the cutter cores (11) and have a spiral angle of 40-45 degrees, and the bottom surfaces of the chip guide grooves (13) are smooth curved surfaces.

2. A high-speed milling cutter according to claim 1, wherein: the four cutting edges (12) are uniformly distributed on the circumferential surface of the cutter body (1), and the four cutting edges are uniformly distributed along the circumferential direction of the cutter body (1) and correspond to the four chip guide grooves (13).

3. A high-speed milling cutter according to claim 1, wherein: the chip guide groove (13) deviates towards one end of the cutter handle (2) along the direction far away from the axial direction of the cutter core (11).

4. A high-speed milling cutter according to claim 1, wherein: the rake angle of the peripheral edge (121) is 8-10 degrees.

5. The high-speed milling cutter according to claim 4, wherein: the radius of the knife core (11) is not less than the distance between the cutting edge of the peripheral edge (121) and the peripheral surface of the knife core (11).

6. The high-speed milling cutter according to claim 5, wherein: the thickness of the blade land (12) is 0.2-0.3 times of the diameter of the knife core (11).

7. The high-speed milling cutter according to claim 6, wherein: the clearance angle of the peripheral edge (121) is 12 to 14 degrees.

8. A high-speed milling cutter according to claim 1, wherein: the outer side of the cutter body (1) is coated with a heat insulation protective film.