CN101147971A - Selective resistance welding melting powder rapid forming method - Google Patents
Selective resistance welding melting powder rapid forming method Download PDFInfo
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- CN101147971A CN101147971A CNA2007101242648A CN200710124264A CN101147971A CN 101147971 A CN101147971 A CN 101147971A CN A2007101242648 A CNA2007101242648 A CN A2007101242648A CN 200710124264 A CN200710124264 A CN 200710124264A CN 101147971 A CN101147971 A CN 101147971A
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Abstract
The present invention relates to a selective resistance welding metting powder quickly-forming method. Said method includes the following steps; creating CAD geometrical model for metal component and making layer discrelization; using electrode bar controlled by computer to make the metal powder laid on the thin-plate electrode be layer-by-layer melted until the metal powder on every lager solid position in workpiece interior is completely welded and combined together, and can be accumulated into a solid body. Said invention possess the following features: using resistance heat as heat source for heating metal powder, having no need of using expensive high-power laser and can greatly reduce equipment cost.
Description
Technical field
What the present invention relates to is metal parts shaping manufacture field, especially a kind of selective resistance welding melting powder rapid forming method.
Background technology
Present powder rapid forming technology mainly is selective laser sintering (SelectiveLaser Sintering is called for short SLS).It mainly is made of laser instrument, laser light path system, scanning mirror, work top, confession powder cylinder, powder-laying roller and formation cylinder.During shaping,, need fill with protective gas for anti-oxidation.Under the preheat temperature of setting in advance, on formation cylinder, spread one deck dusty material earlier with powder-laying roller, then, laser beam according to the information of cross section profile, scans the powder at the solid section place of product under the control of computer, make the temperature of powder rise to melting point, so the fusing of powder particle intersection, powder coheres mutually, progressively obtains each layer profile.Powder in non-sintering zone still is loose condition (of surface), as the support of work and following one deck powder.After one deck was shaped and finishes, the descend height of a cross-sectional layers of formation cylinder descend the stone and the sintering of one deck again, so circulates, and finally forms 3 D workpiece.
After 3 D workpiece was finished, unfused powder can be fallen by brush or scrape from product.
But also there are some significant disadvantages in existing Selective Laser Sintering:
1, the laser instrument cost is too high, and power is big more, and price is expensive more, so that whole fast forming machine price is very expensive.
2, laser work and control system complex structure.
3, in addition,, often need corresponding cooler and outer pipeline, be used for the heat radiation of laser works process in order to keep the laser instrument steady operation.
Summary of the invention
The objective of the invention is deficiency, a kind of selective resistance welding melting powder rapid forming method that lowers the technology cost is provided, be called for short SRW (SelectiveResistance Welding, selective resistance welding) method at above-mentioned manufacturing process existence.
Selective resistance welding melting powder rapid forming method of the present invention may further comprise the steps:
One, set up the CAD geometrical model to metal parts, and it is discrete to carry out layering;
Two, the thin plate electrode that is connected with power supply one utmost point (negative or positive electrode) is set on formation cylinder, and making it end face is a cross section floor height apart from work top, the thin plate electrode can ground connection as required, installing electrodes rod on three-dimensional movable machinery device main shaft, another utmost point of electrode bar and power supply is connected;
Three, for powder cylinder lifting 2 to 5 times of cross section floor heights (but repeatedly lifting of Artificial Control, to guarantee enough to supply powder), will be layered on equably on the thin plate electrode for the metal dust in the powder cylinder with powder-laying roller then, it is concordant with work top to make it end face;
Four, to formation cylinder part input protection gas or mix simultaneously with reducibility gas;
Five, by three-dimensional movable machinery device with the electrode bar tip on the main shaft along the Z axle do relative motion until with stop after metal dust on the formation cylinder thin plate electrode contacts;
Six, connect power supply, make to produce in the metal dust short time under the electrode bar tip that enough resistance heats dissolve and seam;
Seven, cut off the electricity supply, the metal dust in electrode bar tip and the formation cylinder is stopped after the relative motion of Z axle disengages;
Eight, the horizontal level of the next solid section of electrode bar along the XY horizontal motion to workpiece, repeated execution of steps five be to the process of step 8, the whole seam of the solid locational metal dust of this layer in workpiece.
Nine, formation cylinder downward (Z negative sense) moves a cross section floor height, and repeated execution of steps three is to the process between the step 8, and an entity is piled in the whole seam of the solid locational metal dust of each layer in workpiece;
Ten, remove solid bottom thin plate electrode, obtain the form metal workpiece.
Described electrode bar electrical current is 35～405 amperes, and be 7～0.64 seconds conduction time.
Described metal dust comprises aluminium powder, copper powder or iron-carbon alloy powder.
Particle size＜the 0.5mm of described metal dust.
Described thin plate electrode is that thickness is aluminium, copper or the sheet metal of 0.1～5mm, should be approaching when specifically selecting for use with above-mentioned metal dust composition, with guarantee bottom metal dust can with its seam.
Described electrode bar is red copper electrode bar or graphite electrode rod.
Bottom, described electrode bar tip is provided with the plane of diameter 0.5～2mm.The plane at electrode bar tip can guarantee that electrode bar contacts with the metal dust face, rather than the dotted line contact, thereby avoids producing arc phenomenon.
The laying depth of described layer of metal powder, i.e. cross section floor height≤0.5mm.
Described protective gas or mix simultaneously with reducibility gas and be argon gas, nitrogen or mix with small quantity of hydrogen.
Selective resistance welding melting powder rapid forming method of the present invention has following characteristics:
1) uses resistance heat as the metal dust heating source, do not need to use price very
Expensive superpower laser, equipment cost reduces greatly.
2) existing powder rapid forming equipment software and hardware structure system does not need to make
Big change comprises section algorithm and motion control device etc.
3) installing electrodes rod on the main shaft, formation cylinder needs the thin plate electrode as another in addition
The utmost point, power supply is introduced from the outside, and apparatus structure is simply light, can be by electric current and energising
Parameters such as time are controlled the seam process, and control is convenient.
The concrete grammar of selective resistance welding melting powder rapid forming of the present invention is provided in detail by the following drawings and embodiment.
Description of drawings
Fig. 1 is the selective resistance welding melting powder rapid forming method principle schematic.
Among the figure: 1-formation cylinder, 2-thin plate electrode, 3-work top, 4-electrode bar, 5-powder-laying roller, 6-are for powder cylinder, 7-iron-carbon alloy powder.
The specific embodiment
Embodiment: selective resistance welding melting powder rapid forming method
The equipment that present embodiment adopts comprises: fast forming machine and supply unit.Fast forming machine is provided with liftable formation cylinder 1, for the mechanical device of powder cylinder 6 and one its computer of controlling is formed by having three-dimensional motor function, bottom.Supply unit is an electric welding machine, automatically it is carried out switching manipulation by computer.Thin plate electrode 2 is the thick 45# sheet metals of 0.5mm; Electrode bar 4 is graphite electrode rods, the diameter 10mm of electrode bar 4, total length 50mm, the bottom has 45 degree taper wedge angles, the closed angle end bottom has the horizontal plane of diameter 0.5mm, be installed in main shaft after, it is apart from work top 5mm.Being shaped with granularity is 200 purpose Fe-0.77%C iron-carbon alloy powder 7.
Concrete forming technology comprises step down:
One, set up the CAD geometrical model to metal parts, and it is discrete to carry out layering: finish the slicing treatment of STL product model by the software in the computer, generate each layer data of product after, the three-dimensional motion is carried out control operation;
Two, the thin plate electrode 2 that is connected with positive source is set on formation cylinder 1, and making it end face is a cross section floor height 0.1mm apart from work top 3, thin plate electrode 2 ground connection, installing electrodes rod 4 on three-dimensional movable machinery device main shaft, electrode bar 4 is connected with power cathode;
Three, for powder cylinder 6 lifting 0.2mm (but repeatedly lifting of Artificial Control, to guarantee enough to supply powder), to be layered on equably for the iron-carbon alloy powder 7 in the powder cylinder 6 on the thin plate electrode 2 with powder-laying roller 5 then, shop powder thickness is a cross section floor height 0.1mm, and it is concordant with work top 3 to make it end face;
Four, to formation cylinder 1 part input argon gas;
Five, handle main shaft (Z negative sense) mobile 5mm downwards, make electrode bar 4 tips that are installed on the three-dimensional movable machinery device main shaft do relative motion along the Z axle and after contacting iron-carbon alloy powder 7, stop with the iron-carbon alloy powder 7 on the thin plate electrode 2;
Six, connect welder power, electric current is 405 amperes, and be 0.64 second conduction time, makes to produce in 7 short time of iron-carbon alloy powder under main shaft bottom electrode rod 4 tips that enough resistance heats dissolve and seam;
Seven, cut off welder power, handle upwards (Z forward) mobile 5mm of main shaft then, the iron-carbon alloy powder 7 on the thin plate electrode 2 in electrode bar 4 tips and the formation cylinder 1 is stopped after the Z axle disengages do relative motion;
Eight, the horizontal level of the next solid section of electrode bar 4 along the XY horizontal motion to workpiece, repeated execution of steps five be to the process of step 8, the solid locational iron-carbon alloy powder 7 whole seam of each layer in workpiece.
Nine, formation cylinder 1 downward (Z negative sense) moves a cross section floor height 0.1mm, repeated execution of steps three is to the process between the step 8, make the 7 layers of fusing of iron-carbon alloy powder that are layered on the thin plate electrode 2, an entity is piled in the solid locational iron-carbon alloy powder 7 whole seam of each layer in workpiece;
Ten, remove solid bottom thin plate electrode 2, obtain the form metal workpiece.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, its framework form can be flexible and changeable, can the subseries product.Just make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (9)
1. selective resistance welding melting powder rapid forming method comprises step down:
One, set up the CAD geometrical model to metal parts, and it is discrete to carry out layering;
Two, the thin plate electrode that is connected with power supply one utmost point is set on formation cylinder, and making it end face is a cross section floor height apart from work top, the thin plate electrode can ground connection as required, installing electrodes rod on three-dimensional movable machinery device main shaft, and another utmost point of electrode bar and power supply is connected;
Three, for 2 to 5 times of cross section floor heights of powder cylinder lifting, will be layered on equably on the thin plate electrode for De metal dust in the powder cylinder with powder-laying roller then, it is concordant with work top to make it end face;
Four, input protection gas or mix simultaneously in formation cylinder with reducibility gas;
Five, by three-dimensional movable machinery device with the electrode bar on the main shaft most advanced and sophisticated with formation cylinder in the thin plate electrode on metal dust do relative motion along the Z axle and after contacting, stop;
Six, connect power supply, make to produce in the metal dust short time under the electrode bar tip that enough resistance heats dissolve and seam;
Seven, cut off the electricity supply, the metal dust on electrode bar tip and the thin plate electrode is stopped after the relative motion of Z axle disengages;
Eight, the horizontal level of the next solid section of electrode bar along the XY horizontal motion to workpiece, repeated execution of steps five be to the process of step 8, the whole seam of the solid locational metal dust of this layer in workpiece.
Nine, formation cylinder downward (Z negative sense) moves a cross section floor height, and repeated execution of steps three is to the process between the step 8, and an entity is piled in the whole seam of the solid locational metal dust of each layer in workpiece;
Ten, remove solid bottom thin plate electrode, obtain the form metal workpiece.
2. selective resistance welding powder rapid forming method according to claim 1 is characterized in that: described metal dust comprises aluminium powder, copper powder or iron-carbon alloy powder.
3. selective resistance welding powder rapid forming method according to claim 1 and 2 is characterized in that: the particle size＜0.5mm of described metal dust.
4. selective resistance welding powder rapid forming method according to claim 3 is characterized in that: described thin plate electrode is that thickness is aluminium, copper or the sheet metal of 0.1～5mm, specifically should be approaching with above-mentioned metal dust composition.
5. selective resistance welding powder rapid forming method according to claim 4 is characterized in that: described electrode bar is red copper electrode bar or graphite electrode rod.
6. selective resistance welding powder rapid forming method according to claim 5 is characterized in that: bottom, described electrode bar tip is the plane of diameter 0.5～2mm.
7. selective resistance welding powder rapid forming method according to claim 6 is characterized in that: the laying depth of described layer of metal powder, i.e. cross section floor height≤0.5mm.
8. selective resistance welding powder rapid forming method according to claim 7 is characterized in that: described protective gas or mix simultaneously with reducibility gas and be argon gas, nitrogen or mix with small quantity of hydrogen.
9. selective resistance welding powder rapid forming method according to claim 8 is characterized in that: described electrode bar electrical current is 35～405 amperes, and be 7～0.64 seconds conduction time.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101242648A CN100558490C (en) | 2007-11-02 | 2007-11-02 | A kind of selective resistance welding melting powder rapid forming method |
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| CNB2007101242648A CN100558490C (en) | 2007-11-02 | 2007-11-02 | A kind of selective resistance welding melting powder rapid forming method |
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| CN100558490C CN100558490C (en) | 2009-11-11 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785027A (en) * | 2012-08-28 | 2012-11-21 | 西安科技大学 | Rapid forming method using sugar-based material as raw material |
| CN102922108A (en) * | 2012-11-09 | 2013-02-13 | 中国人民解放军装甲兵工程学院 | Plasma welding rapid formation system and method thereof |
| CN103357875A (en) * | 2013-06-28 | 2013-10-23 | 大连理工大学 | Vector sintering system and additive manufacturing method |
| CN104475951A (en) * | 2014-11-09 | 2015-04-01 | 北京工业大学 | Melting-deposition forming method of resistance-heating metal wire |
| CN105798304A (en) * | 2015-01-15 | 2016-07-27 | 空中客车德国运营有限责任公司 | Stiffening component and method for manufacturing a stiffening component |
| CN107584116A (en) * | 2017-08-10 | 2018-01-16 | 常兆芹 | Electric resistance welding formula metal three-dimensional printer and its application method |
| CN108176905A (en) * | 2017-12-27 | 2018-06-19 | 哈尔滨工业大学 | Dusty material selectivity electric spark sintering increasing material manufacturing method and device |
| CN108607992A (en) * | 2018-05-23 | 2018-10-02 | 哈尔滨工业大学 | Microbeam electric arc selectivity consolidation increasing material manufacturing method based on preset metal powder |
| CN109108295A (en) * | 2018-10-23 | 2019-01-01 | 鄂州职业大学 | A kind of selectivity infiltration prepares the method and apparatus device of superhard shield cutter hub |
| CN110237600A (en) * | 2019-04-30 | 2019-09-17 | 西安宝德九土新材料有限公司 | A kind of device and method preparing porous nickel matter filter membrane |
| CN111151755A (en) * | 2020-01-20 | 2020-05-15 | 南昌大学 | Rapid forming device and method for metal-based ceramic composite part based on resistance seam welding |
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| CN104001918B (en) * | 2014-05-28 | 2017-01-18 | 赵晴堂 | Resistance type double-melting stacking three-dimensional metal member manufacturing forming system |
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2007
- 2007-11-02 CN CNB2007101242648A patent/CN100558490C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102785027A (en) * | 2012-08-28 | 2012-11-21 | 西安科技大学 | Rapid forming method using sugar-based material as raw material |
| CN102922108A (en) * | 2012-11-09 | 2013-02-13 | 中国人民解放军装甲兵工程学院 | Plasma welding rapid formation system and method thereof |
| CN103357875A (en) * | 2013-06-28 | 2013-10-23 | 大连理工大学 | Vector sintering system and additive manufacturing method |
| CN103357875B (en) * | 2013-06-28 | 2015-04-08 | 大连理工大学 | Vector sintering system and additive manufacturing method |
| CN104475951A (en) * | 2014-11-09 | 2015-04-01 | 北京工业大学 | Melting-deposition forming method of resistance-heating metal wire |
| CN105798304B (en) * | 2015-01-15 | 2018-12-14 | 空中客车德国运营有限责任公司 | Reinforced member and method for manufacturing reinforced member |
| CN105798304A (en) * | 2015-01-15 | 2016-07-27 | 空中客车德国运营有限责任公司 | Stiffening component and method for manufacturing a stiffening component |
| CN107584116A (en) * | 2017-08-10 | 2018-01-16 | 常兆芹 | Electric resistance welding formula metal three-dimensional printer and its application method |
| CN108176905A (en) * | 2017-12-27 | 2018-06-19 | 哈尔滨工业大学 | Dusty material selectivity electric spark sintering increasing material manufacturing method and device |
| CN108176905B (en) * | 2017-12-27 | 2019-11-05 | 哈尔滨工业大学 | Dusty material selectivity electric spark sintering increasing material manufacturing method and device |
| CN108607992A (en) * | 2018-05-23 | 2018-10-02 | 哈尔滨工业大学 | Microbeam electric arc selectivity consolidation increasing material manufacturing method based on preset metal powder |
| CN109108295A (en) * | 2018-10-23 | 2019-01-01 | 鄂州职业大学 | A kind of selectivity infiltration prepares the method and apparatus device of superhard shield cutter hub |
| CN110237600A (en) * | 2019-04-30 | 2019-09-17 | 西安宝德九土新材料有限公司 | A kind of device and method preparing porous nickel matter filter membrane |
| CN111151755A (en) * | 2020-01-20 | 2020-05-15 | 南昌大学 | Rapid forming device and method for metal-based ceramic composite part based on resistance seam welding |
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Granted publication date: 20091111 Termination date: 20131102 |