WO2022134402A1

WO2022134402A1 - Ceramic cutting tool having chip breaking groove and preparation method therefor

Info

Publication number: WO2022134402A1
Application number: PCT/CN2021/088179
Authority: WO
Inventors: 伍尚华; 许跃锐; 伍海东; 林立甫
Original assignee: 广东工业大学
Priority date: 2020-12-24
Filing date: 2021-04-19
Publication date: 2022-06-30
Also published as: CN112521134A

Abstract

A ceramic cutting tool having a chip breaking groove and a preparation method therefor. The ceramic cutting tool having a chip breaking groove is prepared by photocuring, the chip breaking groove can reduce the cutting force and cutting temperature of the cutting tool during a turning process, and has the effect of guiding and breaking chips, such that the amount of wear in the cutting tool is reduced and the surface machining quality of workpieces is improved. The present invention solves the technical problems of short service life and low processing quality of existing ceramic cutting tools.

Description

A kind of ceramic cutting tool with chip breaker and preparation method thereof

technical field

The invention belongs to the technical field of ceramic material molding, and in particular relates to a ceramic cutter with a chip breaker and a preparation method thereof.

Background technique

Ceramic materials have the advantages of low density, high hardness, high strength, good chemical stability and excellent high temperature performance, and have been widely used in chemical, mechanical, electronic, aerospace and other fields. At present, traditional ceramic molding processes (such as dry pressing, tape casting, hot pressing, gel injection molding, etc.) can form most ceramic products with simple structures. However, due to the low toughness of ceramic materials and the poor machinability of ceramic components, the conventional ceramic manufacturing process often requires the help of molds when manufacturing precision and complex special ceramics, which requires complex process equipment, long production time and extremely high production costs. And the cycle is long, which makes them gradually unable to meet the growing needs of special ceramic product research and development and market use, which seriously hinders the promotion and application of ceramic materials in the engineering field.

Nowadays, most of the traditional commercial ceramic tools are prepared by hot pressing. The ceramic tools prepared by this method cannot form tools with chip breakers and complex patterns, which greatly affects the chip breaking performance of the tools and shortens the tool life. , the machining quality of the workpiece surface is reduced.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a ceramic cutting tool with a chip breaker and a preparation method thereof, which are used to solve the technical problems of short service life and low processing quality of the existing ceramic cutting tools.

A first aspect of the present application provides a method for preparing a zirconia toughened alumina ceramic cutting tool, comprising the steps of:

Step 1, ball milling the ceramic powder, the photosensitive resin, and the photoinitiator to obtain a first ceramic slurry;

Step 2, photocuring the first ceramic slurry to obtain a ceramic cutter body with a chip breaker;

Step 3, debinding and sintering the ceramic cutter body with a chip breaker to obtain the ceramic cutter with a chip breaker;

The width of the chip breaker is 0.5-3mm;

The depth of the chip breaker is 0.2-1mm;

The height of the cutting edge is 0.01-0.5mm;

The width of the rib is 0.05-0.6mm.

Preferably, the chip breaker is a linear arc-shaped chip breaker, the width of the chip breaker is 2.4mm, the depth is 0.4mm, the height of the cutting edge is 0.1mm, and the width of the rib is 0.2mm.

Preferably, the chip breaker is a linear arc-shaped chip breaker, the width of the chip breaker is 1.5mm, the depth is 0.2mm, the height of the cutting edge is 0.3mm, and the width of the rib is 0.15mm.

Preferably, the width of the chip breaker is 2.0mm, the depth is 0.3mm, the height of the cutting edge is 0.2mm, and the width of the rib is 0.2mm.

Preferably, the ceramic powder is any one or more of alumina, silicon nitride, Sialon, boron nitride, TiCN, TiC, TiN, ZrO ₂ , and WC.

Preferably, the photosensitive resin is ethoxylated pentaerythritol tetraacrylate, cyclohexane, aliphatic urethane acrylate, ethyl acetate, 1,6-ethylene glycol diacrylate, n-octanol, isopropanol, polyethylene One or more of glycol and methyl acetate.

Preferably, the photoinitiator is selected from 2-hydroxy-2-methyl-1-phenyl-1-propanone, phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, (2 , 4,6-trimethylbenzoyl) one or more of diphenylphosphine oxide and 2-isopropylthioxanthone.

Preferably, the photo-curing is specifically designed in a three-dimensional drawing software to have a chip breaker width of 0.5-3mm, a depth of 0.2-1mm, a height of a cutting edge of 0.01-0.5mm, and a width of the rib to be 0.05-0.6mm, and then exporting A stl format file is formed, and the first ceramic slurry is subjected to photo-curing molding to obtain a ceramic tool blank.

Preferably, the sintering method is specifically one or more of pressureless sintering, hot pressing sintering, gas pressure sintering, microwave sintering, and hot isostatic pressing sintering.

A second aspect of the present application provides a ceramic cutting tool with a chip breaker.

Compared with the prior art, the present application has the following beneficial effects.

1. Compared with the existing mechanical processing to prepare ceramic tools with chip breakers, photocuring molding can prepare ceramic tools with chip breakers and complex patterns.

2. The ceramic tool with chip breaker and complex pattern prepared by photocuring in the present application can improve the service life of the tool during cutting, reduce the surface roughness of the cutting workpiece, and improve the quality.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art.

FIG. 1 is a schematic view of the dimensions of a ceramic tool with a chip breaker prepared in Example 1 of the application.

Detailed ways

The present application provides a ceramic cutting tool with a chip breaker and a preparation method thereof, which are used to solve the technical problems of short service life and low processing quality of existing ceramic cutting tools.

The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Example 1

Embodiment 1 of the present application provides a first method for preparing a ceramic cutting tool with a chip breaker, which specifically includes the steps:

In step 1, the alumina ceramic powder, the photosensitive resin and the photoinitiator are ball-milled and mixed to obtain a first ceramic slurry;

Step 2: In the 3D drawing software, design the chipbreaker width as 2.4mm, depth as 0.4mm, edge height as 0.1mm, and rib width as 0.2mm. The schematic diagram of the parameters is shown in Figure 1 below, and then exported to stl format file , and the alumina ceramic tool blank is formed on the light-curing equipment with the light-curing slurry.

In step 3, the alumina ceramic cutting tool blank is placed in a degreasing furnace, and a heating program is set to make the temperature rise to 600° C., and the temperature is kept for 3 hours for degreasing and debinding.

Step 4, pressureless sintering: The alumina ceramic tool after debinding is placed in a muffle furnace, heated to 1600°C at a rate of 10°C/min and held for 2 hours, and then cooled to 800°C at a rate of 3°C/min. A sample of alumina ceramic was obtained.

Example 2

Embodiment 2 of the present application provides a second method for preparing a ceramic cutter with a chip breaker, which specifically includes the steps:

Step 1, mixing alumina ceramic powder, photosensitive resin and photoinitiator by ball milling to obtain a first ceramic slurry;

Step 2, in the 3D drawing software, design the chip breaker width to be 1.5mm, the depth to be 0.2mm, the height of the cutting edge to be 0.3mm, and the width of the rib to be 0.15mm. Alumina ceramic tool blanks are formed on the curing equipment.

In step 3, the alumina ceramic cutter body is placed in a degreasing furnace, and a heating program is set so that the temperature is raised to 800° C., and the temperature is kept for 2 hours for degreasing and degumming.

Step 4, pressureless sintering: place the degreasing alumina ceramic tool in a muffle furnace, heat it up to 1650°C at a rate of 10°C/min and keep it for 2 hours, and then cool down to 900°C at a rate of 5°C/min, to obtain alumina ceramic samples,

Example 3

Embodiment 3 of the present application provides a second method for preparing a ceramic cutting tool with a chip breaker, which specifically includes the steps:

Step 2, in the three-dimensional drawing software, design the chip breaker width to be 2mm, the depth to be 0.3mm, the height of the cutting edge to be 0.2mm, and the width of the rib to be 0.2mm, and then export to the stl format file, and use the photocurable paste to cure it in the light. Alumina ceramic tool blanks are formed on the equipment.

Example 4

Embodiment 4 of the present application provides a fourth method for preparing a ceramic cutting tool with a chip breaker.

Different from embodiment 1, 2 or 3, in this embodiment, the alumina ceramic cutting tool blank is placed in a hot isostatic pressing sintering furnace, heated to 1500°C at a rate of 15°C/min, and argon gas is introduced at a temperature of 80MPa. It was kept under pressure for 2 hours, and then cooled to room temperature at a rate of 10°C/min to obtain an alumina ceramic tool.

Example 5

Embodiment 5 of the present application provides a fifth method for preparing a ceramic cutting tool with a chip breaker.

Different from embodiment 1, 2, 3 or 4, step 1 in this embodiment is to ball-mill and mix silicon nitride ceramic powder, photosensitive resin and photoinitiator to obtain the first ceramic slurry;

Example 6

Different from Embodiment 1, 2, 3 or 4, step 1 in this embodiment is to ball mill Sialon ceramic powder, photosensitive resin and photoinitiator to obtain the first ceramic slurry.

Example 7

Different from Embodiment 1, 2, 3 or 4, in step 1 of this embodiment, the first ceramic slurry is obtained by ball milling of boron nitride ceramic powder, photosensitive resin, and photoinitiator.

Example 8

Different from Embodiment 1, 2, 3 or 4, in step 1 of this embodiment, the first ceramic slurry is obtained by ball milling of TiCN ceramic powder, photosensitive resin and photoinitiator.

Example 9

Different from Embodiment 1, 2, 3 or 4, step 1 in this embodiment is to ball-mill and mix TiC ceramic powder, photosensitive resin, and photoinitiator to obtain the first ceramic slurry.

Example 10

Different from Embodiment 1, 2, 3 or 4, step 1 in this embodiment is to ball-mill and mix TiN ceramic powder, photosensitive resin, and photoinitiator to obtain the first ceramic slurry.

Example 11

The difference from Embodiment 1, 2, 3 or 4 is that in step 1 of this embodiment, the first ceramic slurry is obtained by ball milling of ZrO ₂ ceramic powder, photosensitive resin, and photoinitiator.

Example 11

Different from Embodiment 1, 2, 3 or 4, step 1 in this embodiment is to ball mill and mix WC ceramic powder, photosensitive resin, and photoinitiator to obtain the first ceramic slurry.

Example 12

This application is to test the cutting performance of the ceramic tools prepared in Examples 1-11. The alumina ceramic tools prepared in Example 1 are subjected to turning 45# steel experiments, and it is found that the side with a chip breaker is better than without a chip breaker. The life of one side is 30% higher, and the surface roughness of the turning workpiece is reduced by 22%; the alumina ceramic tool prepared in Example 2 is subjected to the experiment of turning 40Cr alloy steel, and it is found that the life of the side with a chip breaker is longer than that of the side without a chip breaker 40% higher, the surface roughness of the turning workpiece is reduced by 30%; the alumina ceramic tool prepared in Example 3 is subjected to the turning gray cast iron experiment, and it is found that the life of the side with the chip breaker is 30% longer than that of the side without the pattern, and the workpiece is turned by 30%. Surface roughness is reduced by 20%.

It can be understood from Examples 1-12 that a ceramic tool with a chip breaker can be prepared by photocuring, and the chip breaker can reduce the cutting force and cutting temperature on the tool during turning, and play a role in guiding and breaking the chips. , to reduce the amount of tool wear and improve the surface processing quality of the workpiece; and to set a reasonable chipbreaker width, chipbreaker depth, edge height, and rib width will greatly improve the performance of the chipbreaker. When the width of the tool chip breaker is 1.5mm, the depth is 0.2mm, the height of the cutting edge is 0.3mm, and the width of the rib is 0.15mm, the ceramic tool has a long service life and high processing quality.

The above are only the preferred embodiments of the present application. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principles of the present application. The tool blank is sintered from other hard ceramic materials and ceramic sintering methods such as hot-press sintering, air pressure sintering, microwave sintering, etc. These improvements and modifications should also be regarded as the protection scope of the present application.

Claims

A method for preparing a ceramic cutting tool with a chip breaker, comprising the following steps:

Step 1, ball milling the ceramic powder, the photosensitive resin, and the photoinitiator to obtain a first ceramic slurry;

Step 2, photocuring the first ceramic slurry to obtain a ceramic cutter body with a chip breaker;

Step 3, debinding and sintering the ceramic cutter body with a chip breaker to obtain the ceramic cutter with a chip breaker;

The width of the chip breaker is 0.5-3mm;

The depth of the chip breaker is 0.2-1mm;

The height of the cutting edge is 0.01-0.5mm;

The width of the rib is 0.05-0.6mm.
The preparation method according to claim 1, wherein the chip breaker is a linear arc-shaped chip breaker, the width of the chip breaker is 2.4mm, the depth is 0.4mm, and the height of the cutting edge is 0.1mm , the rib width is 0.2mm.
The preparation method according to claim 1, wherein the chip breaker is a linear arc-shaped chip breaker, the width of the chip breaker is 1.5mm, the depth is 0.2mm, and the height of the cutting edge is 0.3mm , the rib width is 0.15mm.
The preparation method according to claim 1, wherein the width of the chip breaker is 2.0mm, the depth is 0.3mm, the height of the cutting edge is 0.2mm, and the width of the rib is 0.2mm.
The preparation method according to claim 1, wherein the ceramic powder is any one of alumina, silicon nitride, Sialon, boron nitride, TiCN, TiC, TiN, ZrO 2 , WC or variety.
The preparation method according to claim 1, wherein the photosensitive resin is ethoxylated pentaerythritol tetraacrylate, cyclohexane, aliphatic urethane acrylate, ethyl acetate, 1,6-ethylene glycol diacrylate , one or more of n-octanol, isopropanol, polyethylene glycol and methyl acetate.
The preparation method according to claim 1, wherein the photoinitiator is selected from the group consisting of 2-hydroxy-2-methyl-1-phenyl-1-propanone, phenylbis(2,4,6-tris) One or more of methylbenzoyl)phosphine oxide, (2,4,6-trimethylbenzoyl)diphenylphosphine oxide and 2-isopropylthioxanthone.
The preparation method according to claim 1, wherein the photo-curing is specifically designed in three-dimensional drawing software to have a chip breaker width of 0.5-3 mm, a depth of 0.2-1 mm, and a cutting edge height of 0.01-0.5 mm, The width of the rib is 0.05-0.6 mm, which is then exported into a stl format file, and the first ceramic slurry is subjected to photo-curing molding to obtain a ceramic tool blank.
The preparation method according to claim 1, wherein the sintering method is pressureless sintering, hot pressing sintering, gas pressure sintering, microwave sintering or hot isostatic pressing sintering.
A ceramic cutting tool, characterized in that it is prepared according to the preparation method of any one of claims 1-9.