CN103949641A - Manufacturing process of microporous wire-drawing die core made of hard alloy - Google Patents
Manufacturing process of microporous wire-drawing die core made of hard alloy Download PDFInfo
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- CN103949641A CN103949641A CN201410176431.3A CN201410176431A CN103949641A CN 103949641 A CN103949641 A CN 103949641A CN 201410176431 A CN201410176431 A CN 201410176431A CN 103949641 A CN103949641 A CN 103949641A
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Abstract
The invention discloses a manufacturing process of a microporous wire-drawing die core made of hard alloy. The process comprises the following steps: taking 0.3 micron ultra-fine grained WC powder as a main material, and controlling the content of Co powder to be 5-8% so as to generate a mixture; carrying out die pressing on the mixture through a mechanical powder forming press; obtaining a die core blank by using a special cutter and a semi-finished product machining technology; carrying out pressure sintering as well as grinding through a centerless grinder to obtain the microporous wire-drawing die core. The manufacturing process has the effects as follows: firstly, when the mixture is produced with changed batch numbers and the shrinkage change is greater, the die needs no re-modification, and all that is needed is to adjust the semi-machining parameters; secondly, special semi-machining equipment is used so that the microporous wire-drawing die core product with high dimensional accuracy can be produced effectively, stably and massively.
Description
Technical field
The present invention relates to a kind of micropore die core of wire-drawing die production and manufacture field, be specifically related to a kind of manufacturing process of micropore wire drawing die carbide alloy core rod.
Background technology
The wire drawing die of drawing metal mainly contains three kinds of materials at present: diamond core rod, glomerocryst wire drawing die, sintered carbide wire drawing die.Diamond core rod wearability is fine but expensive; Glomerocryst wire drawing die, material hardness is high, anti-wear performance good, is applicable in environment that temperature is higher the wires such as drawing tungsten, molybdenum, but drawing steel metalloid silk easily causes steel wire embrittlement, produces necking down and fracture of wire phenomenon, reduces the quality of steel wire.
Sintered-carbide die has higher hardness and toughness, is applicable to the drawing of steel wire, the especially high-intensity steel wire of answering in advance.With sintered carbide wire drawing die, its intensity, toughness and surface smoothness can reach well-content result of use.But current aperture is less than the wire drawing die alloy core rod product of 0.20mm, substantially research and development are not produced at home, carbide alloy micropore die core of wire-drawing die product is high to material requirement, moulding difficulty is large, and aperture is less than the formed product difficulty of 0.20mm, and the blank of domestic technique is successfully filled up by my department.
Summary of the invention
The object of the present invention is to provide a kind of manufacturing process of micropore wire drawing die carbide alloy core rod, in order to guarantee product quality, enhance productivity, for the product of difficult forming, we adopt the scheme of semi-finished product processing to solve problem, by the design of double process equipment, reequip, innovation and the production process quality control of the design of half process tool and improvement, processing technology, sintered carbide wire drawing die finished product is accomplished to minimum-value aperture 0.10mm, and can produce in batches and steady quality.
The present invention is achieved like this, and the process route that micropore wire drawing die alloy core rod blank adopts, is characterized in that method step is as follows:
One, batching, adopting 0.3um Ultra-fine Grained WC powder is major ingredient, add Co powder content be controlled at 5-8%, thereby make raw material through add alcohol and grind and spray dry after, the compound hardness of generation is that HRA value is 90～95, makes the wearability of wire drawing die material meet the demand of production.
Two, mold pressing, compound passes through the compression molding of mechanical powder moulding press again, for guaranteeing product quality and production efficiency, in this pressing process, a segment length is left in product center hole site and do not press logical.
Three, false add, by the semi-finished product process equipment of special exploitation, is used the dedicated tool of special material, and above-mentioned length is got through to rear acquisition core rod blank;
Four, sintering and finishing, finally obtain micropore wire drawing die carbide alloy core rod by pressure sintering and centreless grinding grinding.
Further, during described batching, added proprietary forming agent, used PEG as the forming agent of compound, improved compact strength, can directly process without pre-burning; Prior powder metallurgy is produced, and pressed compact need to pass through pre-burning, reach certain intensity just can carry out semi-finished product processing.
Further, during described mold pressing, in core rod product compacting production process, very fast to die wear.When die hardness is too high, mold and punching head easily collapses again.Use is the compound production mould drift of the Co content middle particle WC that is 15-30%, thereby meets the double requirements of wearability and toughness.
Further, described half adding system is comprised of loading and unloading and processing two big units.In operating process, only need operating personnel in automatic loading/unloading unit, to change special-purpose charging tray and carry out procedure quality and control.Special-purpose charging tray has four alignment pins of dual vertical direction, can guarantee the repetitive positioning accuracy of charging tray, thus protection product appearance.
Further, loading and unloading unit is by special-purpose machinery hand operated, and employing crawl product diagonal angle, saves charging tray space, improves sintering efficiency, reduces costs.
Further, the workbench of half adding system is rotational automaticization of double operation, while processing first blank, manipulator press from both sides again simultaneously one standby.After process finishing, worktable rotary completes material loading operation, then repeats material folding.
Further, automatically, in process, procedure is composed of dress defencive function, and when machining center Z axis height exceeds while setting stroke, system can be reported to the police, and stops processing, avoids main shaft to affect processing precision of products with fixture collision.
Further, the described shape of tool of partly processing adopts 80-100 ° of chamfer drill and material to adopt PCD, guarantees the quality stability of product batch production.
Further, described half process equipment double automatic operating, enhances productivity, and reduces Human Error Rate.
Further, semi-finished product add man-hour, and machining area whole process, in closed guard shield, and installs high negative pressure dust collecting system additional in guard shield, and working environment air quality is good, changes the severe idea of traditional half processing environment, makes dust-free workshop.Whole process safety, convenient, stable, thus product quality guaranteed.
Effect of the present invention is: (1) compound changes lot number and produces, when contraction change is larger, need not remodify mould, as long as adjust half machined parameters, (2) special-purpose half process equipment, can be efficiently, in batches, micropore wire drawing die carbide alloy core rod product that stably production dimensional accuracy is high, (3) product aperture is flexible, in 0.10mm～1.00mm pore diameter range, can produce arbitrarily interior hole dimension core rod product according to different customer requirement designs, and not need again to make mould.
Accompanying drawing explanation
Fig. 1 is the structural representation of semi-finished product processing of the present invention.
Fig. 2 is contrast effect figure before and after semi-finished product processing of the present invention.
Double rotary table in the drawings, 1, special-purpose charging tray, 2, wire drawing die blank, 3, manipulator, 4, closed guard shield, 5, process tool, 6, high negative pressure dust collection pipe, 7.
The specific embodiment
Below in conjunction with accompanying drawing explanation, embodiments of the invention are described in further detail, but the present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof, all should list protection scope of the present invention in.
As shown in Figure 1, the present invention comes work and enforcement like this, it is characterized in that method step is as follows:
One, batching, adopting 0.3um Ultra-fine Grained WC powder is major ingredient, add Co powder content be controlled at 5-8%, thereby make raw material through add alcohol and grind and spray dry after, the compound hardness of generation is that HRA value is 90～95, makes the wearability of wire drawing die material meet the demand of production.
Two, mold pressing, compound passes through the compression molding of mechanical powder moulding press again, for guaranteeing product quality and production efficiency, in this pressing process, a segment length is left in product center hole site and do not press logical.
Three, false add, by the semi-finished product process equipment of special exploitation, is used the dedicated tool of special material, and this segment length is got through to rear acquisition core rod blank.
Four, sintering and finishing, finally obtain micropore wire drawing die carbide alloy core rod product by pressure sintering and centreless grinding grinding.
As shown in Figure 1, semi-finished product process equipment comprises charging tray 1, wire drawing die blank 2, manipulator 3, closed guard shield 4, process tool 5, high negative pressure dust collection pipe 6 and double rotary table 7; On double rotary table 7, left end is provided with special-purpose charging tray, upper end is provided with two wire drawing die blanks 2, described one of them wire drawing die blank 2 is provided with manipulator, described another wire drawing die blank 2 is provided with process tool 5, on the described wire drawing die blank 2 that is provided with process tool 5, be covered with closed guard shield 4, side is provided with a high negative pressure dust collection pipe 6, described charging tray 1 is placed wire drawing die blank 2, manipulator 3 is loading and unloading gripping, while processing first blank, manipulator press from both sides again simultaneously one standby, after finishing, worktable rotary completes material loading operation.
As shown in Figure 2, through using half oil (gas) filling device and the exclusive cutter of the present invention's repacking, adopt semi-finished product processing scheme, core rod finished product aperture minimum can be accomplished in 0.1mm, allowance control 0～0.01mm, and product aperture is flexible, in 0.10mm～1.00mm pore diameter range, can produce arbitrarily interior hole dimension core rod product according to different Demand Design, and not need again to make mould.
Claims (7)
1. a manufacturing process for micropore wire drawing die carbide alloy core rod, is characterized in that method step is as follows:
One, batching, adopting 0.3um Ultra-fine Grained WC powder is major ingredient, and the Co powder content of interpolation is controlled at 5-8%, and raw material generates compound hardness through adding alcohol and grinds and spraying after being dried, and its HRA value is 90～95;
Two, mold pressing, compound passes through the compression molding of mechanical powder moulding press again, in this pressing process, a segment length is left in product center hole site and do not press logical;
Three, false add, by the semi-finished product process equipment of special exploitation, is used the dedicated tool of special material, and above-mentioned length is got through to rear acquisition core rod blank;
Four, sintering and finishing, finally obtain micropore wire drawing die carbide alloy core rod by pressure sintering and centreless grinding grinding.
2. the manufacturing process of a kind of micropore wire drawing die carbide alloy core rod according to claim 1, is characterized in that: during described batching, add proprietary PEG as the forming agent of compound, can directly carry out the processing of this finished product without pre-burning.
3. the manufacturing process of a kind of micropore wire drawing die carbide alloy core rod according to claim 1, is characterized in that: during described mold pressing, and the compound production mould drift of the middle particle WC that to use as Co content be 15-30%.
4. the manufacturing process of a kind of micropore wire drawing die carbide alloy core rod according to claim 1, is characterized in that: described semi-finished product process equipment comprises charging tray, wire drawing die blank, manipulator, closed guard shield, process tool, high negative pressure dust collection pipe and double rotary table; On double rotary table, left end is provided with special-purpose charging tray, upper end is provided with two wire drawing die blanks, described one of them wire drawing die blank is provided with manipulator, described another wire drawing die blank is provided with process tool, on the described wire drawing die blank that is provided with process tool, be covered with closed guard shield, closed guard shield side is provided with a high negative pressure dust collection pipe.
5. the manufacturing process of a kind of micropore wire drawing die carbide alloy core rod according to claim 1, is characterized in that: the described shape of tool of partly processing adopts 80-100 ° of chamfer drill, and material adopts PCD.
6. the manufacturing process of a kind of micropore wire drawing die carbide alloy core rod according to claim 1, is characterized in that: described manipulator adopts and captures product diagonal angle.
7. the manufacturing process of a kind of micropore wire drawing die carbide alloy core rod according to claim 1, is characterized in that: described double rotary table automatic operating.
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| CN201410176431.3A CN103949641B (en) | 2014-04-29 | 2014-04-29 | A kind of manufacturing process of micropore wire drawing die carbide alloy core rod |
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| CN103949641B CN103949641B (en) | 2016-01-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607490A (en) * | 2015-03-03 | 2015-05-13 | 株洲力洲硬质合金有限公司 | Processing process of micropore hard alloy wire-drawing mould |
| CN109576548A (en) * | 2018-12-21 | 2019-04-05 | 成都美奢锐新材料有限公司 | A kind of technique of cermet mold core material and its formation die core |
| CN115255834A (en) * | 2022-08-05 | 2022-11-01 | 四川科力特硬质合金股份有限公司 | Process for rapidly milling hard alloy blind hole |
| CN115846664A (en) * | 2022-12-28 | 2023-03-28 | 株洲硬质合金集团有限公司 | Preparation method of hard alloy micropore wire-drawing die |
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| JPH11114964A (en) * | 1997-10-20 | 1999-04-27 | Hashiba Tekko Kk | Vent plug of tire vulcanizing mold and its production |
| CN201823772U (en) * | 2010-09-19 | 2011-05-11 | 赣县世瑞新材料有限公司 | Straight line type wire-drawing die adopting hard alloy die core |
| CN202045173U (en) * | 2011-01-26 | 2011-11-23 | 株洲力洲硬质合金有限公司 | Direct-cooling hard alloy drawing mould |
| CN103480848A (en) * | 2013-09-30 | 2014-01-01 | 苏州益群模具有限公司 | Manufacturing method of high-performance wire-drawing die core |
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2014
- 2014-04-29 CN CN201410176431.3A patent/CN103949641B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11114964A (en) * | 1997-10-20 | 1999-04-27 | Hashiba Tekko Kk | Vent plug of tire vulcanizing mold and its production |
| CN201823772U (en) * | 2010-09-19 | 2011-05-11 | 赣县世瑞新材料有限公司 | Straight line type wire-drawing die adopting hard alloy die core |
| CN202045173U (en) * | 2011-01-26 | 2011-11-23 | 株洲力洲硬质合金有限公司 | Direct-cooling hard alloy drawing mould |
| CN103480848A (en) * | 2013-09-30 | 2014-01-01 | 苏州益群模具有限公司 | Manufacturing method of high-performance wire-drawing die core |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607490A (en) * | 2015-03-03 | 2015-05-13 | 株洲力洲硬质合金有限公司 | Processing process of micropore hard alloy wire-drawing mould |
| CN109576548A (en) * | 2018-12-21 | 2019-04-05 | 成都美奢锐新材料有限公司 | A kind of technique of cermet mold core material and its formation die core |
| CN115255834A (en) * | 2022-08-05 | 2022-11-01 | 四川科力特硬质合金股份有限公司 | Process for rapidly milling hard alloy blind hole |
| CN115846664A (en) * | 2022-12-28 | 2023-03-28 | 株洲硬质合金集团有限公司 | Preparation method of hard alloy micropore wire-drawing die |
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| CN103949641B (en) | 2016-01-20 |
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