CN111822716A - Preparation method of novel technical bead string - Google Patents
Preparation method of novel technical bead string Download PDFInfo
- Publication number
- CN111822716A CN111822716A CN202010704586.5A CN202010704586A CN111822716A CN 111822716 A CN111822716 A CN 111822716A CN 202010704586 A CN202010704586 A CN 202010704586A CN 111822716 A CN111822716 A CN 111822716A
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- Prior art keywords
- pressing
- bead
- novel technical
- warm
- preparation
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- 239000011324 bead Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 37
- 238000005245 sintering Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 10
- 229910003460 diamond Inorganic materials 0.000 claims description 8
- 239000010432 diamond Substances 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011361 granulated particle Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a preparation method of a novel technical bead. And (3) after mixing and granulating, pressing the mixture into a bead ring by using a warm press, and then putting the bead ring and the matrix into a vacuum furnace for sintering. The invention has the advantages of simple production process, high efficiency and low cost, and the beads produced by the method also have the advantages of good self-sharpening property, high sawing efficiency and the like.
Description
Technical Field
The invention relates to the field of processing of diamond tool beads, in particular to a novel sintering process material for beads.
Background
The diamond string bead rope has become an indispensable tool for stone mining and plate processing at present due to the advantages of high yield, good processing quality, difficult raw material damage, high production efficiency and the like and less pollution in the mining process. Along with the continuous increase of diamond string bead wire saw manufacturers, the competition is fierce, the price of string bead wire is continuously reduced, and the combined wire saw is continuously developed to the small-diameter string bead, the traditional hot-pressing sintering string bead faces a series of problems of high production cost, complex production process, low production efficiency of the small-diameter string bead, poor self-sharpening of the marble string bead and the like.
The novel sintering process is adopted to just solve the series of problems, the production process is simplified, the pressing cost and the sintering cost are reduced, and the novel sintering process is not pressurized and sintered, so that the product has the characteristic of good self-sharpening performance, and the efficiency can be improved simultaneously.
However, the domestic non-pressurized sintering process mainly adopts the following two modes:
1) firstly, sintering the bead string ring, and then welding the bead string ring and the matrix together in a brazing mode, so that the production process is complex and the production cost is high;
2) the bead ring pressed compact and the substrate are sintered together, but the problems of high cracking rate and incapability of reducing the production cost still exist.
The invention not only solves the two problems, has low production cost and high sintering efficiency, but also has the advantages of good self-sharpening property, high sawing efficiency and the like.
Disclosure of Invention
1. A preparation method of novel technical beads comprises the following steps:
1) mixing materials: adopting powder suitable for the novel sintering process, respectively weighing and batching according to a required proportion, then putting the powder into a three-dimensional mixer for mixing, then adding diamond and a forming agent, and mixing again;
2) and (3) granulation: after the materials are mixed, pouring the mixture into a granulator for granulation;
3) warm pressing: weighing, namely filling the weighed granular materials into a material cavity of a cold pressing die, pressing the granular materials into a cutter head green body by using an oil press, and placing the cutter head green body on a warm pressing machine for pressing;
4) and (3) sintering: and placing the beads and the substrate together in a vacuum furnace for sintering.
Further, the material mixing time is 45-60 min, and the material mixing time after the diamond is added is 30-45 min;
further, the diameter of the granulated particles is 0.8-2.0 mm;
furthermore, the single weight of the warm pressing is constant volume by adopting a die, and the cold pressing weight is controlled by adjusting the relative position of a punch and a cavity;
further, the pressing height of warm pressing is 5-8 mm, 8-16 beads are pressed at one time, the pressure is controlled to be 300-600 MPa, the temperature is 130-145 ℃ during pressing, and the pressure is maintained for 15-20 seconds;
furthermore, the outer diameter of the used matrix is 5-8 mm, and the inner diameter of the bead string after warm pressing is controlled to be 0.01-0.04 mm larger than that of the matrix;
further, the temperature rise rate of the beads is 1.5-4 ℃/min, the temperature is kept at 350-450 ℃ for 0.5h, so that the forming agent can be conveniently removed, the maximum sintering temperature is 800-950 ℃, and the temperature keeping time is 1 h.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings:
FIG. 1 is a flow chart of a novel process for preparing beads of beads;
FIG. 2 is a schematic view of a warm-pressing die sleeve structure;
FIG. 3 is a cross-sectional view of the press at warm press;
fig. 4 is a schematic view of a sintered bead structure.
Detailed Description
The invention is further described in detail with reference to specific examples, and the whole process for preparing the bead string is shown in figure 1.
The method comprises the following steps: and (3) mixing materials. The method comprises the steps of adopting powder WY-11 suitable for a novel sintering process, adding powder such as superfine iron powder, WC, Co, copper tin 8020 and the like, weighing and batching the powder according to a required proportion, then putting the powder into a three-dimensional mixer for mixing for 45-60 min, taking out mixed powder after the mixing is finished, adding diamond and a forming agent, and pouring the mixed powder into the three-dimensional mixer again for mixing for 30-45 min.
Step two: and (6) granulating. And pouring the mixed mixture into a granulator for granulation. In order to ensure the single weight stability under warm pressure, the particle diameter of the resulting particles is preferably controlled to 0.6 to 2.0 mm.
Step three: and (5) warm pressing. The warm pressing die sleeve structure is shown in figure 2, 8-16 beads are pressed at one time, the pressure is controlled to be 300-600 MPa, the temperature is 130-145 ℃ during pressing, and the pressure is maintained for 15-20 seconds. The structure diagram of the warm-pressing die is shown in fig. 3, a lower punch 5 and a core rod 2 are connected with a lower movable mechanism of a warm-pressing machine, an upper punch 1 is connected with an upper movable mechanism of the warm-pressing machine, a die sleeve 4 is fixed with a machine table, and the temperature of the parts reaches a set value through oil temperature or resistance heating.
During pressing, the lower punch 5 and the core rod 2 are adjusted to the designated positions according to the single weight requirement, and powder is conveyed into the cavity through the material pushing box; then the upper punch 1 enters the cavity and is kept for a certain time; and finally, the upper punch 1 is withdrawn from the cavity, and the lower punch 5 extends out of the die sleeve to eject the press ring, so that automatic pressing is completed.
In the warm pressing process, the powder single weight is controlled by the heights of the lower punch 5 and the core rod 2, and the pressure is controlled by controlling the height of the upper punch 1. The pressing height of the warm pressing ring 3 is 5-8 mm, the outer diameter of the adopted base body is 5-8 mm, and as shown in figure 4, the inner diameter D2 of the pressing ring 3 after warm pressing is 0.01-0.04 mm larger than the outer diameter D1 of the base body 6.
Step four: and (5) sintering. And putting the beads and the substrate together into a vacuum furnace for sintering, wherein the vacuum degree is not higher than 100 Pa. When the sintering temperature of the beads is less than or equal to 600 ℃, the heating rate is 3.5-4 ℃/min, and the temperature is kept at 350-450 ℃ for 0.5h, so that the forming agent can be removed conveniently; when the temperature is raised to above 600 ℃, the heating rate is controlled to be 1.5-2 ℃/min, the highest sintering temperature is different according to the types and proportions of the mixed materials, generally controlled to be 800-950 ℃, and the heat preservation time is 1 h.
The above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention, so that the changes and modifications made by the claims and the specification of the present invention should fall within the scope of the present invention.
Claims (7)
1. A preparation method of novel technical beads comprises the following steps:
1) mixing materials: adopting powder suitable for the novel sintering process, respectively weighing and batching according to a required proportion, then putting the powder into a three-dimensional mixer for mixing, then adding diamond and a forming agent, and mixing again;
2) and (3) granulation: after the materials are mixed, pouring the mixture into a granulator for granulation;
3) warm pressing: weighing, namely filling the weighed granular materials into a material cavity of a cold pressing die, pressing the granular materials into a cutter head green body by using an oil press, and placing the cutter head green body on a warm pressing machine for pressing;
4) and (3) sintering: and putting the beads and the substrate into a vacuum furnace for sintering.
2. The preparation method of the novel technical bead according to claim 1, characterized in that the mixing time is 45-60 min, and the mixing time after adding the diamond is 30-45 min.
3. The method for preparing a novel technical bead string according to claim 1, characterized in that the particle diameter of the granulation is 0.8-2 mm.
4. The method for preparing a novel technical bead according to claim 1, wherein the single weight of the warm pressing is constant volume by adopting a die, and the cold pressing weight is controlled by adjusting the relative position of a punch and a cavity.
5. The preparation method of a novel technical bead according to claim 4, characterized in that the warm-pressing height is 5-8 mm, 8-16 beads are pressed at one time, the pressure is controlled at 300-600 MPa, the temperature is 130-145 ℃ during pressing, and the pressure is maintained for 15-20 seconds.
6. The method for preparing a novel technical bead string according to claim 1, characterized in that the outer diameter of the substrate is 5-8 mm, and the inner diameter of the bead string after warm pressing is controlled to be 0.01-0.04 mm larger than the substrate.
7. The preparation method of the novel technical bead according to claim 1, characterized in that the sintering temperature of the bead is 800-950 ℃, and the holding time is 1 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010704586.5A CN111822716A (en) | 2020-07-21 | 2020-07-21 | Preparation method of novel technical bead string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010704586.5A CN111822716A (en) | 2020-07-21 | 2020-07-21 | Preparation method of novel technical bead string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111822716A true CN111822716A (en) | 2020-10-27 |
Family
ID=72924467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010704586.5A Pending CN111822716A (en) | 2020-07-21 | 2020-07-21 | Preparation method of novel technical bead string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111822716A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114905634A (en) * | 2022-05-11 | 2022-08-16 | 泉州华大超硬工具科技有限公司 | High-performance diamond bead structure and preparation method thereof |
Citations (5)
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|---|---|---|---|---|
| CN101214570A (en) * | 2008-01-18 | 2008-07-09 | 博深工具股份有限公司 | Method of preparing diamond bead |
| KR20090060330A (en) * | 2006-10-04 | 2009-06-11 | 유로텅스텐 뽀우드레스 | Prealloyed metal powder, process for obtaining it, and cutting tools produced with it |
| CN102825254A (en) * | 2012-09-05 | 2012-12-19 | 厦门致力金刚石科技股份有限公司 | Diamond bead string and manufacturing method thereof as well as rope saw without base body supporting layer |
| US20130046105A1 (en) * | 2011-02-11 | 2013-02-21 | E I Du Pont De Nemours And Company | Method for obtaining a lipid-containing composition from microbial biomass |
| CN105695830A (en) * | 2016-01-29 | 2016-06-22 | 长沙百川超硬材料工具有限公司 | Pressure-free sintering preparation method of diamond string bead |
-
2020
- 2020-07-21 CN CN202010704586.5A patent/CN111822716A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090060330A (en) * | 2006-10-04 | 2009-06-11 | 유로텅스텐 뽀우드레스 | Prealloyed metal powder, process for obtaining it, and cutting tools produced with it |
| CN101214570A (en) * | 2008-01-18 | 2008-07-09 | 博深工具股份有限公司 | Method of preparing diamond bead |
| US20130046105A1 (en) * | 2011-02-11 | 2013-02-21 | E I Du Pont De Nemours And Company | Method for obtaining a lipid-containing composition from microbial biomass |
| CN102825254A (en) * | 2012-09-05 | 2012-12-19 | 厦门致力金刚石科技股份有限公司 | Diamond bead string and manufacturing method thereof as well as rope saw without base body supporting layer |
| CN105695830A (en) * | 2016-01-29 | 2016-06-22 | 长沙百川超硬材料工具有限公司 | Pressure-free sintering preparation method of diamond string bead |
Non-Patent Citations (1)
| Title |
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| 吴庆定 等: "《木质粉末温压成形原理与技术》", 31 January 2012, 湖南大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114905634A (en) * | 2022-05-11 | 2022-08-16 | 泉州华大超硬工具科技有限公司 | High-performance diamond bead structure and preparation method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20201027 |