CN217044767U

CN217044767U - Multi-blade PCBN milling cutter

Info

Publication number: CN217044767U
Application number: CN202220440415.0U
Authority: CN
Inventors: 肖剑峰; 左亚军; 杨森
Original assignee: Beijing Worldia Diamond Tools Co ltd
Current assignee: Beijing Worldia Diamond Tools Co ltd
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-07-26
Anticipated expiration: 2032-03-01

Abstract

A multi-edge PCBN milling cutter achieves the technical problem of prolonging the service life of a blade by designing the structure of the blade and the mounting structure of the blade. The combined type electric scalpel comprises a scalpel head part and a flat tail part, wherein the scalpel head part and the flat tail part are integrally formed, and the scalpel head part comprises a scalpel head body and a plurality of composite type blades fixed on the scalpel head body; the cutter head comprises a cutter head body, a plurality of tooth bases and a chamfer, wherein the tooth bases are arranged on the circumference of the cutter head body, one blade is fixed in each tooth base, a mounting gap is formed between each blade and the cutter head body, one side, close to the mounting gap, of the end surface of each blade is provided with the chamfer, the design of the mounting gap and the chamfer of each blade can avoid unnecessary force action generated between the blades and the cutter head body, the blades cannot be cracked due to stress concentration, and the service life of the blades is prolonged; the utility model discloses mainly used cutter's production and processing.

Description

Multi-blade PCBN milling cutter

Technical Field

The utility model relates to a cutter manufacturing technical field, concretely relates to multiple-cutting-edge PCBN milling cutter.

Background

The multi-edge spiral milling cutter carries out cutting on a machined workpiece by the aid of the circumferential cutting edges, when the circumferential blades carry out cutting, cutting force between the blades and the machined workpiece is large, the blades can be subjected to large reaction force, the installation structure of the blades is one of stress modes which directly influence the blades, and further the service life of the blades is influenced, and meanwhile the structure of the blades is another key factor which influences the service life of the blades.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is to prior art's not enough, releases a multiple-cutting-edge PCBN milling cutter, through the technical problem of the structural design of blade and the mounting structure's of blade design in order to reach the life who improves the blade.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a multi-edge PCBN milling cutter comprises a cutter head part and a flat tail part, wherein the cutter head part and the flat tail part are integrally formed, and the cutter head part comprises a cutter head body and a plurality of composite blades fixed on the cutter head body; the cutter head comprises a cutter head body and is characterized in that a plurality of tooth bases are arranged in the circumferential direction of the cutter head body, one blade is fixed in each tooth base, a mounting gap is formed between each blade and the cutter head body, and a chamfer is arranged on one side, close to the mounting gap, of the end face of each blade.

Further, every the blade all includes the installation department of carbide material and the cutting portion of PCBN material, the cutting portion is fixed on the installation department, the installation department is fixed on the tooth base, the cutting portion with the terminal surface of installation department is close to one side of installation clearance all sets up the chamfer.

Further, the length of the mounting gap is greater than the thickness of the chip part and less than the sum of the thicknesses of the chip part and the mounting part.

Furthermore, the edge of the outer side of the chip part, which is far away from one side of the installation part, is of a chamfered structure.

Further, a clearance angle α between the chip part and the mounting part is 6 ° to 10 °.

Furthermore, an inwards concave first chip removal groove is formed between any two adjacent tooth bases.

Further, the tool bit body is close to the one end of flat afterbody sets up annular arch, set up sectorial second chip groove in the annular arch, the second chip groove with first chip groove forms the chip removal passageway that link up.

Furthermore, at least one group of driving surfaces which are symmetrical along the center of the driving surfaces are arranged on the outer wall of the flat tail part, and the driving surfaces are of a plane structure which extends along the axial direction of the flat tail part.

Furthermore, a cavity is arranged in the tool bit body, a first cooling hole is formed in the end portion of the tool bit body, and a plurality of second cooling holes are formed in the outer wall of the tool bit body along the circumferential direction of the outer wall.

The utility model has the advantages that:

when the blade is arranged on the blade head body, an installation gap is reserved between the blade and the blade head body, the installation gap makes up the interference of mutual force possibly caused by the deformation of the blade head body and the blade to ensure the accuracy of blade installation, and simultaneously prevents the blade from generating unnecessary interaction with the blade head body to cause micro-deformation when the blade is processed, and the micro-deformation of the blade not only influences the service life of the blade but also causes the quality of a processed workpiece to be not up to standard; meanwhile, the end face of the blade close to the mounting gap is designed into a chamfer structure, and the condition of stress concentration can be avoided when the blade is machined, so that the blade is prevented from collapsing at the position, and the service life of the blade is further prolonged.

Drawings

FIG. 1 is a perspective view of the present embodiment;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 2;

FIG. 4 is a left side view in the present embodiment;

fig. 5 is a front view in the present embodiment;

description of the reference numerals: 1. a tool bit body; 1-1, a tooth base; 1-11, mounting gaps; 1-2, a first chip groove; 1-3, a first cooling hole; 1-4, a second cooling hole; 2. a blade; 2-1, a chip part; 2-11, first chamfering; 2-2, mounting part; 2-21, second chamfering; 3. an annular projection; 3-1, a second chip groove; 4. a flat tail part; 4-1, driving surface.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying fig. 1-5 and the embodiments.

As shown in fig. 1-3, a multi-blade PCBN milling cutter comprises a cutter head portion and a flat tail portion 4, the cutter head portion and the flat tail portion 4 are integrally formed, the cutter head portion comprises a cutter head body 1 and a plurality of composite blades 2 fixed on the cutter head body 1, a plurality of tooth bases 1-1 are arranged in the circumferential direction of the cutter head body 1, one blade 2 is fixed in each tooth base 1-1, a mounting gap 1-11 is arranged between each blade 2 and the cutter head body 1, and a chamfer is arranged on the end surface of each blade 2 close to one of the mounting gaps 1-11.

The utility model provides a many sword PCBN milling cutter, the setting up of installation clearance 1-11 can prevent that the effect that self deformation effect and the tool bit body 1 self of blade 2 warp from influencing the installation accuracy of blade 2, thereby reduce the effect of tool bit body 1 to blade 2 production in the use of cutter and influence the life of cutter, the chamfer setting of blade 2 plays the cushioning effect, this edge that prevents blade 2 receives the effect of concentration force and leads to blade 2 to collapse and lack, further prolong the life of blade 2.

Each blade 2 comprises a mounting part 2-2 made of hard alloy and a cutting part 2-1 made of PCBN, the cutting part 2-1 is welded on the mounting part 2-2, the mounting part 2-2 is welded on the tooth base 1-1, and the composite blade 2 can enable the blade 2 to have the characteristic of higher hardness than that of hard alloy and simultaneously have good rigidity and wear resistance.

The chamfers comprise a first chamfer 2-11 and a second chamfer 2-21 with consistent gradient, the first chamfer 2-11 is arranged on one side, close to the mounting gap 1-11, of the end surface of the cutting part 2-1, and the second chamfer 2-21 is arranged on one side, close to the mounting gap 1-11, of the end surface of the mounting part 2-2.

The length of the mounting gap 1-11 is greater than the thickness of the chip part 2-1 but less than the sum of the thicknesses of the chip part 2-1 and the mounting part 2-2.

The part of the cutting blade 2 which plays a role in cutting is a cutting part 2-1, the cutting part 2-1 is a part which is subjected to larger force when the milling cutter works, and the arrangement of the mounting clearance 1-11 between the cutting part 2-1 and the cutter head body 1 can prevent the cutting part 2-1 from generating larger force effect with the cutter head body 1 when the cutting part 2-1 cuts a machined workpiece, so that the machining precision is influenced, and the cutter can be damaged.

The length of the mounting gap 1-11 is smaller than the sum of the thicknesses of the cutting part 2-1 and the mounting part 2-2, so that one part of the mounting part 2-2 and the tool bit body 1 is in a completely abutted state, the mounting part 2-2 mainly plays a role in fixing the blade 2 on the tooth base 1-1, and the abutting of the mounting part 2-2 and the tool bit body 1 can ensure that the mounting position of the mounting part 2-2 is more accurate, and further ensure the mounting accuracy of the cutting part 2-1.

The outer side edge of one side of the cutting part 2-1, which is far away from the mounting part 2-2, is of a chamfering structure, and the chamfering structure can effectively avoid the brittleness of a cutting edge to prevent the damage of the blade 2 when the cutting function of the cutting part 2-1 is not influenced.

As shown in fig. 4-5, the cutting portion 2-1 and the mounting portion 2-2 have a clearance angle α of 6 ° to 10 °, and specific angles are related to working conditions at the time of machining the insert 2, such as a slight difference in the components of raw materials used for machining and a slight degree of wear of a die, but it is satisfactory as long as the angle is maintained within 6 ° to 10 °.

An inward-concave first chip groove 1-2 is formed between any two adjacent tooth bases 1-1.

One end of the tool bit body 1, which is close to the flat tail portion 4, is provided with an annular protrusion 3 which is used for being matched and positioned with the tool holder, a second fan-shaped chip removal groove 3-1 is formed in the annular protrusion 3, the second chip removal groove 3-1 is communicated with the first chip removal groove 1-2 to form a through chip removal channel, the through chip removal channel is used for discharging machining chips generated when a workpiece is machined out of the milling cutter, the second fan-shaped chip removal groove 3-1 increases a chip removal space, and the machining chips can be better discharged out of the tool bit body 1.

The outer wall of the flat tail part 4 is provided with at least one group of driving surfaces 4-1 which are symmetrical along the center of the flat tail part, the driving surfaces 4-1 are plane structures which extend along the axial direction of the flat tail part 4, and the driving surfaces 4-1 are matched with the cutter handle to drive the milling cutter.

The tool bit comprises a tool bit body 1, and is characterized in that a cavity is arranged in the tool bit body 1, a first cooling hole 1-3 is formed in the end part of the tool bit body 1, a plurality of second cooling holes 1-4 are uniformly distributed in the circumferential direction of the tool bit body 1, and cooling liquid can timely flow into the cavity of the tool bit body 1 through the arrangement of the first cooling hole 1-3 and the second cooling holes 1-4 so as to efficiently cool the tool bit body 1.

The working principle of the cooling holes and the driving principle of the driving surface 4-1 of the spade tail belong to the prior art and are not described in detail here.

The working principle is as follows: use a many sword PCBN milling cutter that this application designed, the chamfer setting of blade 2 can prevent blade 2 when adding the condition that collapses of blade 2 that the stress concentration leads to in man-hour, sets up installation clearance 1-11 between blade 2 and the tool bit body 1 simultaneously and can prevent that blade 2 from adding man-hour and tool bit body 1 from producing the effect of unnecessary power with tool bit body 1 to influence the life of blade 2.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A multi-edge PCBN milling cutter comprises a cutter head part and a flat tail part (4), wherein the cutter head part and the flat tail part (4) are integrally formed, and the cutter head part comprises a cutter head body (1) and a plurality of composite type blades (2) fixed on the cutter head body (1); the novel cutting head is characterized in that a plurality of tooth bases (1-1) are arranged in the circumferential direction of the cutting head body (1), one blade (2) is fixed in each tooth base (1-1), an installation gap (1-11) is formed between each blade (2) and the cutting head body (1), and a chamfer is arranged on one side, close to the installation gap (1-11), of the end face of each blade (2).

2. A multi-edged PCBN milling cutter as claimed in claim 1, characterized in that each of the inserts (2) comprises a mounting portion (2-2) of cemented carbide material and a chip portion (2-1) of PCBN material, the chip portion (2-1) being fixed to the mounting portion (2-2), the mounting portion (2-2) being fixed to the tooth base (1-1), the chamfer being provided on the side of the end surfaces of the chip portion (2-1) and the mounting portion (2-2) adjacent to the mounting gap (1-11).

3. A multi-edged PCBN milling cutter as claimed in claim 2, characterized in that the length of the mounting gap (1-11) is greater than the thickness of the chip part (2-1) and less than the sum of the thicknesses of the chip part (2-1) and the mounting part (2-2).

4. A multi-edged PCBN milling cutter as claimed in claim 3, characterized in that the outer edge of the chip part (2-1) on the side remote from the mounting part (2-2) is of chamfered construction.

5. A multi-edged PCBN milling cutter as claimed in claim 4, wherein the clearance angle α of the chip part (2-1) and the mounting part (2-2) is 6-10 °.

6. A multi-edged PCBN milling cutter as claimed in any one of claims 1 to 5, wherein an inwardly recessed first flute (1-2) is formed between any adjacent two of the tooth bases (1-1).

7. A multi-edged PCBN milling cutter as claimed in claim 6, wherein the end of the cutter head body (1) close to the flat tail (4) is provided with an annular projection (3), and the annular projection (3) is provided with a second chip discharge groove (3-1) in a fan shape, and the second chip discharge groove (3-1) and the first chip discharge groove (1-2) form a through chip discharge passage.

8. A multi-edged PCBN milling cutter as claimed in claim 7, wherein the outer wall of the flat tail part (4) is provided with at least one set of drive surfaces (4-1) symmetrical along its center, the drive surfaces (4-1) being of planar configuration extending in the axial direction of the flat tail part (4).

9. A multi-edged PCBN milling cutter as claimed in claim 8, wherein the cutter head body (1) is provided with a cavity therein, the end of the cutter head body (1) is provided with a first cooling hole (1-3), and the outer wall of the cutter head body (1) is provided with a plurality of second cooling holes (1-4) along the circumference thereof.