CN212443287U

CN212443287U - Micro-groove tool bit

Info

Publication number: CN212443287U
Application number: CN202020571802.9U
Authority: CN
Inventors: 伍晓宇; 鲁艳军; 陈福民; 周超兰; 李伟秋; 罗旺; 颜炳姜
Original assignee: Shenzhen University; Conprofe Technology Group Co Ltd
Current assignee: Shenzhen University; Conprofe Technology Group Co Ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-02-02
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses a little recess tool bit, this tool bit have the rake face, be equipped with at least a set of little texture on the rake face, little texture is including seting up in first recess on the rake face and locating a plurality of second recesses on the bottom surface of first recess. The utility model has the advantages that: the microtexture on the front knife face is arranged in a double-concave mode, so that the dissipation and buffering of processing stress are facilitated, the heat dissipation and chip containing performance is better, the structure is stable, and the processing performance can be greatly improved.

Description

Micro-groove tool bit

Technical Field

The utility model relates to a precision finishing technical field especially relates to a little fluted cutter head.

Background

A large number of experimental researches find that the cutting temperature of the front cutter face of the cutter head is higher than that of the rear cutter face, the wear performance of the front cutter face can be reduced by processing a micro-texture on the front cutter face, and the arrangement form of the micro-texture directly influences the cutting performance and the stability of the cutter head.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving at least: the utility model provides a little fluted cutter head can be favorable to the dissipation and the buffering of stress, has the heat dissipation of preferred and holds the bits performance, and the structure is firm.

In order to achieve the above object, the utility model provides a little fluted cutter head, it has the rake face, be equipped with at least a set of little texture on the rake face, little texture is including offering in first recess on the rake face and locating a plurality of second recesses on the bottom surface of first recess.

Preferably, the rake face and the first groove are both triangular, and the side edges of the first groove are parallel to the side edges of the rake face in a one-to-one correspondence.

Preferably, the plurality of second grooves located in the first groove are in a triangular array, and the sides of the triangle defined by the plurality of second grooves are parallel to the sides of the first groove in a one-to-one correspondence manner.

Preferably, three groups of the micro textures are arranged on the rake face, and the three groups of the micro textures are in a triangular array.

Preferably, the width of the first groove is 0.5-4 mm, the depth of the first groove is 50-200 μm, the width of the second groove is 10-200 μm, and the depth of the second groove is 5-50 μm.

Preferably, the second groove is in a triangular pyramid shape, and the inner diameter of the second groove gradually increases from the bottom to the top.

As a preferred scheme, the front tool face is also provided with a chip removal port.

Preferably, the chip removal port is arranged at the center of the rake face.

Preferably, the micro-groove cutter head is made of polycrystalline diamond.

The embodiment of the utility model provides a little fluted tool bit, compared with the prior art, its beneficial effect lies in:

the utility model discloses little groove cutter head is provided with at least a set of little texture on the rake face, and little texture is the form of two indents, and little texture is including seting up a plurality of second recesses on the first recess on the rake face and locating the bottom surface of first recess, not only can effectively dissipate and cushion the machining stress of cutter head in the course of working, and for the little texture of other forms, the structure of cutter head is more reliable and stable, can increase substantially the processability of cutter head.

Drawings

FIG. 1 is a schematic view of a micro-groove cutting insert according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a method for forming a microtextured first recess according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a method for forming a microtextured second recess according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a second electrode according to an embodiment of the present invention;

fig. 5 is a schematic flow chart illustrating a method for manufacturing microtexture of a micro-groove tool bit according to an embodiment of the present invention;

fig. 6 is a schematic flow chart illustrating a method for forming a microtextured first recess according to an embodiment of the present invention;

fig. 7 is a schematic flow chart illustrating a method for forming a microtextured second groove according to an embodiment of the present invention.

In the figure, 1, a tool bit; 11. a rake face; 111. a first groove; 112. a second groove; 113. a chip removal port; 2. a first electrode; 3. a second electrode; 31. a convex portion.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, a micro-groove cutting tool according to a preferred embodiment of the present invention has a rake surface 11, at least one set of micro-texture is provided on the rake surface 11, and the micro-texture includes a first groove 111 provided on the rake surface 11 and a plurality of second grooves 112 provided on the bottom surface of the first groove 111.

Based on the technical scheme, because the double-layer concave microtexture is arranged on the front cutter face 11, the machining stress of the cutter head in the machining process can be effectively dissipated and buffered, and the heat dissipation and chip containing performance is improved, so that the machining performance of the cutter head is greatly improved, and the structural stability of the cutter head can be ensured relative to the microtexture arranged in the concave layer.

In order to further ensure the stability of the micro-groove cutter head, the overall profile of the cutter head 1 is in a triangular prism shape, and the front cutter face 11 is in a triangular shape.

Correspondingly, in order to further ensure the release and buffering of the machining stress of the cutter head and improve the heat dissipation and chip containing performance of the cutter head, the first groove 111 is in a triangular shape, and the side edges of the first groove 111 are parallel to the side edges of the rake face 11 in a one-to-one correspondence manner; the plurality of second grooves 112 located in the first groove 111 are in a triangular array, and the sides of the triangle defined by the plurality of second grooves 112 are parallel to the sides of the first groove 111 in a one-to-one correspondence manner.

In the same way, in this embodiment, three groups of micro-textures are disposed on the rake surface 11, the three groups of micro-textures are arranged in a triangular array, and the sides of the triangle defined by the three groups of micro-textures are parallel to the sides of the rake surface 11 in a one-to-one correspondence manner, so as to further ensure the structural stability of the tool bit.

In this embodiment, the second groove 112 is in a triangular pyramid shape, and the inner diameter of the second groove 112 gradually increases from the bottom to the top. In addition, the second groove 112 may be formed in a quadrangular pyramid shape or a polygonal pyramid shape.

Preferably, in the embodiment, in order to further optimize the heat dissipation and chip-containing performance, the width of the first groove is 0.5-4 mm, the depth of the first groove is 50-200 μm, the width of the second groove is 10-200 μm, and the depth of the second groove is 5-50 μm. Illustratively, the first groove is in a triangular shape with the side length of 0.5-4 mm, and the second groove is in a triangular pyramid shape with the side length of 10-200 mu m.

In this embodiment, in order to further ensure the chip removal performance, the rake face 11 is further provided with a chip removal port 113; illustratively, the exhaust port 113 is located at the center of the rake face and at a location surrounded by the sets of microtextures.

The material of the cutter head 1 is any one of polycrystalline diamond, monocrystalline diamond, chemical vapor deposition diamond, polycrystalline cubic boron nitride, ceramic and hard alloy, and the requirement of high hardness can be met.

In this embodiment, the cutting tip 1 is preferably made of Polycrystalline diamond (PCD). The tool bit not only can be set into an integral PCD tool bit, namely the whole tool bit 1 is integrally formed by PCD, but also is suitable for setting the surface layer of the tool bit 1 into PCD material. The PCD tool bit is mainly used for the precision machining of alloy, ceramics and hard and brittle wear-resistant materials which do not contain ferrous metals, and has the characteristics of long service life, high production efficiency, high machined surface smoothness, high machining precision and the like.

A second aspect of the embodiments of the present invention provides a method for manufacturing a microtexture of a micro-groove cutter head according to any one of the first aspect, specifically referring to fig. 5, which includes the following steps:

machining a first groove 111 on the rake face 11 of the tool bit 1 by means of an electric spark using the first electrode 2; a plurality of second grooves 112 are formed on the bottom surface of the first groove 111 by means of an electric spark using the second electrode 3.

The first groove 111 and the second groove 112 are sequentially formed by the first electrode 2 and the second electrode 3 in an electric spark mode, and in the electric spark machining process, metal in the tool bit 1 is melted by highly concentrated pulse discharge energy and strong discharge explosive force, so that the manufacturability is good, the efficiency is high, and the machining precision and the surface quality can be improved.

Taking the second electrode as an example, the specific working process of the electric spark forming is explained as follows: when the first electrode 2 is close to the rake face 11 of the tool bit 1, pulse voltage is applied between the tool bit 1 and the first electrode 2, so that spark oil at the closest point between the tool bit 1 and the first electrode 2 under the current condition is broken down to form a discharge path, the pulse voltage generates a gap discharge phenomenon, and high temperature is generated to ablate the rake face 11 of the tool bit 1, so that the purpose of removing materials is achieved; the first pulse discharge is finished, the next pulse discharge process occurs at the closest point between the next tool bit 1 and the first electrode 2 within a very short time, the whole process is circularly repeated, and the first electrode 2 is continuously fed, so that the contour shape of the front end of the first electrode 2 is copied to the front tool face of the tool bit to form a first groove.

The second electrode 3 is machined in a similar manner to the first electrode 2, and is transferred to the bottom surface of the first groove 111 of the cutting head 1 via the projection 31 on the discharge end surface of the second electrode 3, thereby forming a second groove 112.

Specifically, as shown in fig. 2 and 6, the first groove 111 is specifically processed by the following steps:

A. the tool bit 1 is arranged on a workbench, the first electrode 2 is arranged on a machine tool main shaft, and the tool bit 1 and the first electrode 2 are immersed in spark oil; the shape of the discharge end face of the first electrode 2 is matched with the shape of the first groove 111 to be formed;

B. the machine tool spindle drives the first electrode 2 to feed in a direction perpendicular to the rake surface 11 of the tool bit 1, and performs electric discharge machining on the rake surface 11 of the tool bit 1 to form a first groove.

Preferably, in order to maximize the efficiency while ensuring high processing precision, the first electrode 2 adopts unidirectional feeding, and the feeding speed V is 0.1-5 μm/s; when the micro texture is formed, the pulse voltage of the pulse power supply is 10-200V, the pulse width is 0.1-100 mus, and the inter-pulse width is 0.1-100 mus.

Referring to fig. 3 and 7, in particular, the second groove 112 is processed by the following steps:

s1, installing the tool bit 1 on a workbench, installing the second electrode 3 on a machine tool spindle, and immersing the tool bit 1 and the second electrode 3 in spark oil; the shape of the discharge end surface of the second electrode 3 matches with the shape of the first groove 111, and the discharge end surface of the second electrode 3 is provided with a plurality of protrusions 31 matching with the shape of the second groove 112 to be formed, as shown in fig. 4;

s2, respectively connecting the tool bit 1 and the second electrode 3 to two poles of a pulse power supply;

s3, the machine tool spindle drives the second electrode 3 to advance in a direction perpendicular to the rake surface 11 of the tool bit 1, and the bottom surface of the first groove 111 is subjected to electric discharge machining to form a plurality of second grooves 112.

Similarly, in order to ensure the processing precision and the processing efficiency, when the second groove 112 is formed, the pulse voltage of the pulse power supply is 10-200V, the pulse width is 0.1-100 μ s, and the inter-pulse width is 0.1-100 μ s; the second electrode 3 adopts unidirectional feeding, and the feeding speed V is_f0.1 to 5 μm/s.

In this embodiment, the first electrode 2 and the second electrode 3 are both provided as red copper electrodes; alternatively, the first electrode 2 and the second electrode 3 may also be provided as copper electrodes or mixed electrodes containing copper.

To sum up, the embodiment of the present invention provides a micro-groove tool bit and a method for manufacturing the micro-texture thereof, wherein at least one group of micro-textures is arranged on a rake face, and the micro-textures are in a form of double-indent, and include a first groove arranged on the rake face and a plurality of second grooves arranged on the bottom surface of the first groove, so that the machining stress of the tool bit during the machining process can be effectively dissipated and buffered, and the structure of the tool bit is more stable and reliable compared with the micro-textures of other forms, and the machining performance of the tool bit can be greatly improved; additionally, the embodiment of the utility model provides an in utilize the microtexture on the electric spark shaping rake face, for traditional machining, ultrasonic machining and laser beam machining, machining efficiency is high, and the shaping precision is high, surface quality is good.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a little fluted cutter head, its characterized in that, the tool bit has the rake face, be equipped with at least a set of little texture on the rake face, little texture is including offering in first recess on the rake face and locating a plurality of second recesses on the bottom surface of first recess.

2. A micro-groove cutter head according to claim 1, wherein the rake face and the first groove are each triangular in shape, and the respective sides of the first groove are parallel to the respective sides of the rake face in a one-to-one correspondence.

3. A micro-groove cutter head according to claim 2 wherein a plurality of said second grooves within said first groove are in a triangular array with the sides of the triangle defined by a plurality of said second grooves being parallel to the sides of said first groove in a one-to-one correspondence.

4. A tool bit of claim 2 wherein three sets of said microtextures are provided on said rake surface, said microtextures being in a triangular array.

5. A micro-groove cutting head according to claim 1, wherein the second groove is triangular pyramidal in shape and has an inner diameter that increases from the bottom thereof to the top.

6. A micro-groove cutting head according to claim 1, wherein the first grooves have a groove width of 0.5 to 4mm, the first grooves have a groove depth of 50 to 200 μm, the second grooves have a groove width of 10 to 200 μm, and the second grooves have a groove depth of 5 to 50 μm.

7. The micro-groove cutter head according to any one of claims 1-6, wherein the rake face is further provided with a chip removal port.

8. A micro-groove cutting head according to claim 7, wherein the chip removal port is provided at the center of the rake face.

9. A micro-groove cutting tip as claimed in claim 1, wherein the cutting tip is made of polycrystalline diamond.