CN218905900U

CN218905900U - Cutter for processing graphite material

Info

Publication number: CN218905900U
Application number: CN202222757944.6U
Authority: CN
Inventors: 郭保贺; 王旭; 兰明明; 兰江明
Original assignee: Biel Crystal Manufactory Huizhou Ltd
Current assignee: Biel Crystal Manufactory Huizhou Ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-04-25
Anticipated expiration: 2032-10-19

Abstract

The utility model relates to the technical field of die processing, and particularly discloses a cutter for graphite material processing, which comprises a cutter body, a bottom edge positioned at one end of the cutter body and a plurality of blades which are adjacent to the bottom edge and are spirally arranged at the ring side of the cutter body, wherein a cutter groove is formed between two adjacent blades, the diameter of the bottom edge is between 0.275 and 0.3mm, a clearance groove is formed in the center of the bottom edge, the front angle of the blade is 6 degrees, the rear angle of the blade is 0 degrees, the blade comprises an arc part connected with the bottom edge and an inclined clearance part connected with the arc part, and the bottom edge is lower than the center of the bottom edge by 0.02 to 0.05mm. The cutter can increase the linear speed, improve the cutting capability, reduce the surface roughness of the die, ensure the consistency of the graphite hot bending die processing, solve the problems of no cutter lines and poor wire drawing on the processing surface, has small cutter abrasion and high processing efficiency, and can improve the problem of inverted triangle on the die surface.

Description

Cutter for processing graphite material

Technical Field

The utility model relates to the technical field of mold processing, in particular to a cutter for processing graphite materials.

Background

The graphite hot bending die is usually processed by using a double-edge CVD coating ball cutter, and in the use process of the ball cutter, the linear speed of a cutter position (namely a cutter point position) is zero, and the ball cutter has no cutting capability, so that the processing effect of the ball cutter on the graphite hot bending die is poor, the roughness after the die processing is generally Sa: 800-1300 nm, the product consistency is poor, and cutter lines which are consistent with the path distance and wire drawing lines with irregular shapes can be formed on the processing surface. In the processing process, even if the knife contact is far away from the knife site, the processing effect is still poor due to the influence of graphite materials. In this case, the hot bending die after processing needs to be manually polished, and when the manual polishing is adopted, the polishing of the die is uneven, so that the yield of the die is affected; in addition, the glass product after hot bending is not easy to polish, and the polishing yield is low.

At present, a ox nose knife is adopted to process a graphite hot bending die, and the ox nose knife is a high-linear-speed tool, and is limited in processing due to the fact that the processing patterns of the graphite hot bending die are curved surfaces; the larger the linear speed is, the larger the abrasion is, the sheet forming form of the heated bending die is affected, when the ox nose knife is used for processing the graphite heated bending die, the main abrasion position of the knife is concentrated at the joint of the R angle and the bottom edge, the condition that a concentrated area is undercut is easily generated at the joint of the curved surface of the die and the middle large surface (commonly called as an inverted triangle), and the inverted triangle affects the heated bending forming of the die; the linear speed of the middle position of the bottom edge of the bull nose knife is still zero, and the middle position of the bottom edge extrudes graphite scraps during processing, so that the problem of poor wire drawing is easily generated.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a tool for graphite material processing that can increase linear velocity, improve cutting ability, reduce mold surface roughness, ensure consistency of graphite hot bending mold processing, solve problems of no cutting lines and poor wire drawing on the processing surface, have small tool wear, high processing efficiency, and can improve the problem of inverted triangle on the mold surface.

A cutter for graphite material processing, includes the cutter body, is located the bottom sword of cutter body one end and is adjacent the bottom sword sets up in a plurality of cutting edges of cutter body ring side with the spiral, adjacent two form the sword groove between the cutting edge, the diameter of bottom sword is between 0.275-0.3mm, and the clearance recess has been seted up to the central point of bottom sword, the front angle of cutting edge is 6, and the rear angle of cutting edge is 0, the cutting edge include with the circular arc portion that the bottom sword is connected and with the slope clearance portion that the circular arc portion is connected, bottom sword blade is less than bottom sword center 0.02-0.05mm.

In one embodiment, the bottom edge has a diameter of 0.3mm.

In one embodiment, the diameter of the clearance groove is between 0.2 and 0.25mm.

In one embodiment, the number of the cutting edges is 7, and 7 cutting edges are uniformly distributed on the annular side of the cutter body.

In one embodiment, the helix angle of the sipe is 30 °.

In one embodiment, the cutter body is made of GK05A tungsten steel.

In one embodiment, the inclined position avoiding portion includes a first inclined surface connected to the circular arc portion and a second inclined surface connected to the first inclined surface, and an inclination angle of the second inclined surface is larger than an inclination angle of the first inclined surface.

In one embodiment, the length of the first inclined surface is 0.1-0.15mm, and the inclination angle of the second inclined surface is 15 °.

In one embodiment, the surfaces of the blade edge, the bottom edge and the pocket are each provided with a protective coating.

In one embodiment, the protective coating is a CVD diamond coating, tiN coating, ALCrN coating, tiCN coating, or ALTiN coating.

The diameter of the bottom edge is designed to be between 0.275 and 0.3mm, so that the linear speed of the cutter is increased, the cutting capacity of the cutter is improved, the generation of cutter lines is avoided, the surface roughness of a die can be reduced, the consistency of graphite hot bending die processing is ensured, the processing path distance is increased, the processing time is shortened, and the processing efficiency is improved; the diameter of the bottom edge is smaller, so that concentrated abrasion of the cutter is reduced, and the problem of inverted triangle is eliminated; the clearance groove is formed in the center of the bottom edge, so that graphite scraps are prevented from being extruded by the center of the cutter, and poor wire drawing is avoided.

Drawings

FIG. 1 is a schematic view of a tool according to an embodiment of the utility model;

FIG. 2 is a front view of a tool according to one embodiment of the utility model;

FIG. 3 isbase:Sub>A cross-sectional view in the direction A-A of the embodiment of FIG. 2;

FIG. 4 is a schematic view of a portion of a cutting edge in accordance with one embodiment of the present utility model;

FIG. 5 is a side view of a tool in one embodiment of the utility model;

fig. 6 is a sectional view in the direction D-D of the embodiment shown in fig. 5.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1-4, the utility model discloses a cutter 10 for processing graphite materials, which comprises a cutter body 100, a bottom edge 110 positioned at one end of the cutter body 100 and a plurality of cutting edges 200 adjacent to the bottom edge 110 and spirally arranged at the annular side of the cutter body 100, wherein the other end of the cutter body 100 is connected with a cutter handle 300, a chamfer of 0.5mm is arranged at one end part of the cutter handle 300 far away from the cutter body 100, the diameter of the cutter handle 300 is 4mm, a truncated cone-shaped transition part 400 is connected between the cutter handle 300 and the cutter body 100, the diameter of the cutter body 100 is 2mm, the included angle between the outer annular surface of the truncated cone-shaped transition part 400 and the axial direction of the cutter is 15 degrees, and the cutter handle 300 is used for providing a mounting part of the cutter on a machine tool. In this embodiment, the cutter body 100 is made of GK05A tungsten steel, and the cutter handle 300 and the truncated cone-shaped transition portion 400 are made of GK05A tungsten steel, and of course, other metal materials with higher mechanical strength may be used to make the cutter handle 300 and the truncated cone-shaped transition portion 400 if the processing technology allows. A cutter groove 201 is formed between two adjacent cutting edges 200, and the cutter groove 201 serves as a moving passage of graphite chips when the cutter machines the graphite material mold, so that the crushed graphite chips are guided out through the cutter groove 201. Preferably, the helix angle of sipe 201 is 30 °.

In this embodiment, the diameter of the bottom edge 110 is between 0.275-0.3mm, preferably the diameter of the bottom edge 110 is 0.3mm. The diameter of the bottom edge 110 is designed to be 0.3mm, so that the linear speed of the bottom edge 110 of the cutter body 100 is increased, the cutting capability of the cutter is improved, the cutter lines are avoided from being generated on the surface of the processed die, the roughness of the surface of the processed die is further reduced, the diameter of the bottom edge 110 is smaller, the linear speed is relatively smaller, and the concentrated abrasion of the cutter is reduced. In addition, the center of the bottom blade 110 is provided with a clearance groove 120, and preferably, the diameter of the clearance groove 120 is 0.2-0.25mm. In this embodiment, by providing the clearance groove 120 at the center of the bottom edge 110 (i.e., the tool location point), the center of the bottom edge 110 of the tool is prevented from extruding graphite scraps, thereby preventing the wire drawing problem on the machined die surface.

Referring to fig. 2 and 3, the rake angle of the blade 200 is 6 ° and the relief angle of the blade 200 is 0 °. In this embodiment, the rake angle of the blade 200 refers to the angle between a side surface of the blade 200 in the advancing direction and the center of the blade body 100, and by designing the rake angle of the blade 200 to be 6 °, the shearing force of the surface of the die is large when the blade 200 contacts the surface of the graphite material die, thereby improving the cutting capability of the cutter. The relief angle of the blade 200 is 0 °, i.e., the blade 200 does not open the relief angle. In addition, referring to fig. 4, in the present embodiment, the bottom edge is 0.02-0.05mm lower than the bottom edge center, in other words, the bottom edge 110 is designed with a low center, so that the blind cutting area of the cutting site (i.e. the position-avoiding groove 120) can be avoided, the chip capacity of the front end of the tool (i.e. the bottom edge 110 end) can be increased, and the middle clearance of the bottom edge 110 can be facilitated.

Referring to fig. 3, 5 and 6, the blade 200 includes a circular arc portion 210 connected to the bottom blade 110 and an inclined clearance portion connected to the circular arc portion 210. The further inclined position avoiding portion includes a first inclined surface 220 connected to the circular arc portion 210 and a second inclined surface 230 connected to the first inclined surface 220, and an inclination angle of the second inclined surface 230 is larger than an inclination angle of the first inclined surface 220. Preferably, the length of the first inclined surface 220 is 0.1-0.15mm, and the inclination angle of the second inclined surface 230 is 15 °, that is, the angle of the second inclined surface 230 with respect to the axial direction of the cutter body 100 is 15 °. In this embodiment, the end of the cutter body 100 far from the bottom edge 110 is designed to be the rear surface of the cutter, the rear surface width is designed to be 0.1 mm-0.15 mm (i.e. the length of the first inclined surface 220), and 15 ° clearance (i.e. the inclination angle of the second inclined surface 230) is designed after the rear surface width is ensured, so that the rear surface of the cutter has extrusion grinding effect, and the surface roughness is improved by virtue of extrusion grinding of the rear surface of the cutter. In this embodiment, the diameter of the portion of the cutter body 100 where the cutting edge 200 is located is smaller than the diameter of the portion of the cutter body 100 where the non-cutting edge 200 is located.

It should be further noted that in this embodiment, the number of the cutting edges 200 is 7, and 7 cutting edges 200 are uniformly distributed on the annular side of the cutter body 100, so as to reduce the single-edge cutting amount, increase the wear resistance of the cutter, and reduce the cutter wear. The number of blades 200 may be further adjusted during actual machining to accommodate surface machining of different dies.

In one embodiment, the surfaces of the cutting edge 200, the bottom edge 110, and the pocket 201 are each provided with a protective coating to increase the wear resistance of the tool. Further, the protective coating is a CVD diamond coating, tiN coating, ALCrN coating, tiCN coating or ALTiN coating. In this embodiment, when the protective coating is a CVD diamond coating, the tool of this embodiment is suitable for processing graphite materials such as graphite hot bending dies and graphite electrodes, and is also suitable for processing ceramic green body materials. When the protective coating is a TiN coating or an ALCrN coating, or no protective coating is used, the tool of the present embodiment is suitable for processing softer metallic materials such as copper, aluminum, low carbon steel, and the like. When the protective coating is a TiCN coating or an ALTIN coating, the tool of the embodiment is suitable for processing hard metal materials.

The tool 10 for processing graphite material according to the present utility model can achieve at least the following technical effects:

1) Reducing the surface roughness. Taking HK-75 as an example, the surface roughness Sa of the ball cutter is 800-1300 nm, and the surface roughness Sa of the cutter is 100-200 nm.

2) The processed surface has no bad knife lines. The bottom of the cutter forms a circle with the diameter of 0.3mm in a rotating state, and has a certain linear velocity.

3) The processed surface has no wire drawing defect. The center of the bottom edge 110 of the cutter is kept away from the air, so that the graphite scraps are prevented from being extruded by the center of the cutter, and poor wire drawing is avoided.

4) The abrasion of the cutter is reduced, the service life of the cutter is prolonged, and the consistency of the processing effect is ensured; and the design of 7 blades is adopted, so that the cutting quantity of each blade is reduced, and the wear resistance of the cutter is improved.

5) The processing time is reduced, and the processing efficiency is improved. A bottom edge 110 diameter of 0.3mm may suitably increase the processing path spacing and reduce processing time.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a cutter for graphite materials processing, includes the cutter body, is located the bottom sword of cutter body one end and is adjacent the bottom sword sets up in a plurality of cutting edges of cutter body ring side spiral, adjacent two form the sword groove between the cutting edge, its characterized in that, the diameter of bottom sword is between 0.275-0.3mm, and the clearance recess has been seted up to the central part of bottom sword, the front angle of cutting edge is 6, and the rear angle of cutting edge is 0, the cutting edge include with the circular arc portion that the bottom sword is connected and with the slope clearance portion that the circular arc portion is connected, the bottom sword blade is less than bottom sword center 0.02-0.05mm.

2. The tool according to claim 1, wherein the diameter of the bottom edge is 0.3mm.

3. The tool according to claim 2, wherein the diameter of the relief groove is between 0.2 and 0.25mm.

4. A tool according to claim 3, wherein the number of said blades is 7,7 said blades being evenly distributed on the annular side of the tool body.

5. The tool according to claim 4, wherein the helix angle of the flutes is 30 °.

6. The tool according to claim 5, wherein the tool body is made of GK05A tungsten steel.

7. The tool according to claim 6, wherein the inclined position avoiding portion includes a first inclined surface connected to the circular arc portion and a second inclined surface connected to the first inclined surface, and an inclination angle of the second inclined surface is larger than an inclination angle of the first inclined surface.

8. The tool according to claim 7, wherein the length of the first inclined surface is 0.1-0.15mm and the inclination of the second inclined surface is 15 °.

9. The tool according to claim 8, wherein the surfaces of the cutting edge, the bottom edge and the pocket are each provided with a protective coating.

10. The tool of claim 9, wherein the protective coating is a CVD diamond coating, tiN coating, ALCrN coating, tiCN coating, or ALTiN coating.