CN1799729A - Method for reducing shrinkage cavity defect in routine casting by use of electric impulse - Google Patents
Method for reducing shrinkage cavity defect in routine casting by use of electric impulse Download PDFInfo
- Publication number
- CN1799729A CN1799729A CN 200610045623 CN200610045623A CN1799729A CN 1799729 A CN1799729 A CN 1799729A CN 200610045623 CN200610045623 CN 200610045623 CN 200610045623 A CN200610045623 A CN 200610045623A CN 1799729 A CN1799729 A CN 1799729A
- Authority
- CN
- China
- Prior art keywords
- shrinkage cavity
- casting
- alloy
- foundry goods
- current density
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to a method for reducing the defects of shrinkage cavity in common casting via electric impulse. It processes impulse current on the cast in the alloy solidification process, via the effect of current, to realize the elimination or reduction of shrinkage cavity and areosis defects of cast. The inventive method comprises: laying electrodes connecting with discharging device in treated area of cast; pouring the alloy flux into mould; processing the impulse current treatment when the temperature of flux is reduced to solidification point and said treatment can be lasted in the solidification area. And solidifying and shaping treated flux. Compared present technique, said invention comprises following advantages: 1, it can complement other methods which also can reduce said defects, and it can attain high quality casts with lower casting cost when it is used in common casting; 2, the generation of impulse current can realize accurate control while it can add electrode at special position according to actual demand to realize the accurate treatment of cast.
Description
Technical field: the present invention relates to a kind of method that reduces shrinkage cavity defect in the routine casting, particularly a kind of method with shrinkage cavity defect in the electric pulse minimizing routine casting belongs to the forming materials application.
Background technology: in conventional gravitational casting technology, shrinkage cavity and rarefaction defect are one of major issues that influences casting quality.Method of subduing this defective commonly used has methods such as additive, control type wall temperature and the rate of heat dispation of use.Use additive can change casting composition and produce other problems.Control type wall temperature and rate of heat dissipation can make the manufacturing process of casting mold complicated.
Summary of the invention: the objective of the invention is drawback, and provide a kind of method simple, do not change the elimination of casting composition or reduce the shrinkage cavity in the alloy-steel casting, the method for rarefaction defect at above-mentioned prior art.For achieving the above object, the present invention adopts following technical proposals: the method that reduces shrinkage cavity defect in the routine casting with electric pulse, this method is in alloy graining process foundry goods to be applied pulse current to handle, by the influence of electric current, realize shrinkage cavity and rarefaction defect in elimination or the minimizing foundry goods to alloy graining process.
The present invention compared with prior art has following advantage: 1, with other methods of subduing the shrinkage cavity rarefaction defect complementarity is arranged, when being used for routine casting, can obtain high-quality foundry goods under low casting condition of cost; 2, the generation of pulse current can realize controlling more accurately, can be as required adds electrode at the specific position of foundry goods and realizes processing to foundry goods being more suitable for accurately control and the purpose of handling.
Description of drawings:
Fig. 1 is an operation principle schematic diagram of the present invention.
The specific embodiment:
Embodiment
With the method for shrinkage cavity defect in the electric pulse minimizing routine casting, this method is in alloy graining process foundry goods to be applied pulse current to handle, and by the influence of electric current to alloy graining process, realizes shrinkage cavity and rarefaction defect in elimination or the minimizing foundry goods.Above-mentioned electric pulse is by the capacitor discharge generation.Capacitive discharge unit constitutes (described control circuit is a custom circuit) by large-scale capacitor device and control circuit.Voltage on capacitor and discharge current will be decided according to the size dimension and the composition of foundry goods.Be about 1～10A/cm as the required current density range of hard lead (Pb-Sn)
2The required current density range of allumen (ZA series) is about (0.7～1.0) * 10
4A/cm
2The required current density range of aluminium lithium alloy (Al-Li) is about (2.0～6.0) * 10
4A/cm
2
As shown in Figure 1, dc source is the high-power high voltage power supply, mainly is to be used for providing charge power supply for capacitor.Control circuit can be controlled charge switch K
1, can control discharge switch K by circuits for triggering simultaneously
2K
2Generally constitute, also can constitute by high-power silicon controlled rectifier by triggering discharge tube (combustion conduit).During the capacitor charging, K
1Be in closure state, K
2Be in off-state.When the capacitor charging reaches necessary requirement, control circuit turn off charge switch K
1This moment, the charging voltage of capacitor can be monitored by voltmeter V.When foundry goods reached the curing condition that powers up burst process, control circuit was by trigger circuit triggers discharge switch K
2Thereby, make pulse current pass through the foundry goods melt, realize adding electric treatment.Handling electric current can observe by discharge current checkout gear (storage oscilloscope etc.).
Concrete processing step
(1) electrode that links to each other with discharge equipment is buried in the zone that foundry goods need be handled on casting mold underground;
(2) alloy melt is poured in the casting mold;
(3) treat that melt begins to add the pulse current processing, sustainable processing in the alloy graining warm area near being cooled to freezing point;
(4) handling the back melt solidifying is shaped.
Claims (4)
1, a kind of method that reduces shrinkage cavity defect in the routine casting with electric pulse, this method is in alloy graining process foundry goods to be applied pulse current to handle, by the influence of electric current, realize shrinkage cavity and rarefaction defect in elimination or the minimizing foundry goods to alloy graining process.
2, the method with shrinkage cavity defect in the electric pulse minimizing routine casting as claimed in claim 1, concrete processing step:
(1) electrode that links to each other with discharge equipment is buried in the zone that foundry goods need be handled on casting mold underground;
(2) alloy melt is poured in the casting mold;
(3) treat that melt begins to add the pulse current processing, sustainable processing in the alloy graining warm area near being cooled to freezing point;
(4) handling the back melt solidifying is shaped.
3, the method that reduces shrinkage cavity defect in the routine casting with electric pulse as claimed in claim 1, it is characterized in that: described electric pulse is by the capacitor discharge generation, capacitive discharge unit is made of large-scale capacitor device and control circuit, and voltage on capacitor and discharge current density will be decided according to the size dimension and the composition of foundry goods.
4, the method with shrinkage cavity defect in the electric pulse minimizing routine casting as claimed in claim 1 is characterized in that: described discharge current density, as: the required current density range of hard lead is 1～10A/cm
2The required current density range of allumen is (0.7～1.0) * 10
4A/cm
2The required current density range of aluminium lithium alloy is (2.0～6.0) * 10
4A/cm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610045623 CN1799729A (en) | 2006-01-10 | 2006-01-10 | Method for reducing shrinkage cavity defect in routine casting by use of electric impulse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610045623 CN1799729A (en) | 2006-01-10 | 2006-01-10 | Method for reducing shrinkage cavity defect in routine casting by use of electric impulse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1799729A true CN1799729A (en) | 2006-07-12 |
Family
ID=36810075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610045623 Pending CN1799729A (en) | 2006-01-10 | 2006-01-10 | Method for reducing shrinkage cavity defect in routine casting by use of electric impulse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1799729A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941066A (en) * | 2010-10-15 | 2011-01-12 | 哈尔滨工业大学 | Ceramic casting mold applied to metal casting under electric field treatment and method for casting titanium aluminum-based alloy by using same |
| CN103212697A (en) * | 2013-04-12 | 2013-07-24 | 西北工业大学 | Casting mould method for improving casting aluminium alloy solidification structure by adopting variable-frequency low-voltage modulating pulse electric field |
| CN104141101A (en) * | 2013-05-10 | 2014-11-12 | 贵州大学 | Pulse current assisted aluminum alloy homogenization heat treatment method |
| CN106424668A (en) * | 2016-09-13 | 2017-02-22 | 昆明理工大学 | Method for improving corrosion resistance of cast iron casting |
-
2006
- 2006-01-10 CN CN 200610045623 patent/CN1799729A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941066A (en) * | 2010-10-15 | 2011-01-12 | 哈尔滨工业大学 | Ceramic casting mold applied to metal casting under electric field treatment and method for casting titanium aluminum-based alloy by using same |
| CN101941066B (en) * | 2010-10-15 | 2012-07-04 | 哈尔滨工业大学 | Ceramic casting mold applied to metal casting under electric field treatment and method for casting titanium aluminum-based alloy by using same |
| CN103212697A (en) * | 2013-04-12 | 2013-07-24 | 西北工业大学 | Casting mould method for improving casting aluminium alloy solidification structure by adopting variable-frequency low-voltage modulating pulse electric field |
| CN103212697B (en) * | 2013-04-12 | 2015-04-01 | 西北工业大学 | Casting mould method for improving casting aluminium alloy solidification structure by adopting variable-frequency low-voltage modulating pulse electric field |
| CN104141101A (en) * | 2013-05-10 | 2014-11-12 | 贵州大学 | Pulse current assisted aluminum alloy homogenization heat treatment method |
| CN104141101B (en) * | 2013-05-10 | 2017-02-22 | 贵州大学 | Pulse current assisted aluminum alloy homogenization heat treatment method |
| CN106424668A (en) * | 2016-09-13 | 2017-02-22 | 昆明理工大学 | Method for improving corrosion resistance of cast iron casting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1947893A (en) | Method for mfg. aluminium alloy wheel hub | |
| CN1799729A (en) | Method for reducing shrinkage cavity defect in routine casting by use of electric impulse | |
| CN101927337A (en) | Technical process for casting cylinder cover and engine body component of diesel engine | |
| CN207310402U (en) | A kind of injection mold base being automatically separated | |
| WO2012100658A1 (en) | Gating system | |
| CN101791681B (en) | Water-cooling die casting production process of plate blank used for medium plate | |
| CN109365795A (en) | A kind of novel Casting Equipment | |
| CN101722291A (en) | Method and device for simulating horizontal growth process of solidification structure | |
| CN206253620U (en) | Effectively alleviate the mould overflow gas extraction system of semisolid pressure casting part solid-liquor separation defect | |
| CN105665657A (en) | Discrete casting method for preparing homogenized cast ingot | |
| CN103406503A (en) | Method for producing high-quality large steel ingot and device thereof | |
| EP2656946A1 (en) | Method for enhancing self-feeding ability of heavy section casting blank | |
| CN102392205A (en) | Method for preparing precision copper part | |
| CN102350485A (en) | Device and process for repairing shrinkage holes during steel billet casting through intermediate-frequency electric heating | |
| CN103212697B (en) | Casting mould method for improving casting aluminium alloy solidification structure by adopting variable-frequency low-voltage modulating pulse electric field | |
| CN102784898B (en) | Local pressurization mechanism and method for producing automobile engine suspension shock insulators by same | |
| CN201308985Y (en) | Low-voltage pulse magnetic field coagulation device | |
| CN104107974A (en) | Low-heat intermittent pulse cold repair method for cast aluminium alloy materials | |
| CN105290378A (en) | Cast-welding method for lead-acid storage battery tabs | |
| CN207770808U (en) | A kind of ultrasonic activation casting device of aluminium alloy wheel hub | |
| CN206510366U (en) | The device of clout in a kind of removing injection moulding die casting mouth | |
| CN204171285U (en) | A kind of aero-engine aluminum alloy baffle plate metal type cast system | |
| CN207887862U (en) | A kind of automobile drawing die die holder class casting pouring device | |
| CN207533947U (en) | Metal alloy compositions precision casting apparatus | |
| CN112387928A (en) | Sand mold casting process method and casting equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |