CN104972076B - A kind of vacuum casting electrical heating sandbox and the hot composite casting technology of bimetallic using its realization - Google Patents
A kind of vacuum casting electrical heating sandbox and the hot composite casting technology of bimetallic using its realization Download PDFInfo
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- CN104972076B CN104972076B CN201510374532.6A CN201510374532A CN104972076B CN 104972076 B CN104972076 B CN 104972076B CN 201510374532 A CN201510374532 A CN 201510374532A CN 104972076 B CN104972076 B CN 104972076B
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Abstract
The compound casting technique of bimetallic heat is realized the invention discloses a kind of vacuum casting electrical heating sandbox and using it, carry out the pretreatment such as punching in composite surface after casting metallic base layer, then make product complex and coat releasing sand high-strength high temperature-resistant coating, then the product complex after surface drying is put into electrical heating sandbox, space is filled with dry sand and takes out consolidation with vacuum, open gasification after complex is heated to preset temperature by induction coil and fall composite filled layer, then it is by casting gate that liquid metal injection progress heat is compound.Beneficial effects of the present invention：Provide a kind of method for realizing that solid-liquid bimetallic is compound, whole flow process will make sand mold, preheating and casting link and integrate and complete in a single device, greatly save production process and production cost, casting composite surface cleaning oxide-free residual, occlusion degree is high, service life length.
Description
Technical field
The invention belongs to casting technique field, and in particular to a kind of vacuum casting electrical heating sandbox and realize solid using it
The compound casting technique of metal-liquid metal thermal.
Background technology
When making the consumptive material class products such as wearing plate, bimetallic casting complex technique is often used, so-called bimetallic pours
Casting complex technique refers to using solid-liquid or liquid-liquid mode heat the metal material of two kinds of unlike material structures again at high temperature
Close, a kind of one side of generation possesses high tenacity, another side possesses high rigidity（Wearability）Composite.Carrying out, solid-liquid is compound
When, it is necessary to first produce sand mold, then by solid metal（Base layer）It is partially placed into sand mold, is integrally put into sandbox after mould assembling
It is heated to further take out after certain temperature in box type heater and is put into casting room and is cast.In this course, sand mold heat transfer is slow
Slowly cause the heat time longer, influence production efficiency, and the antioxidant smeared in advance is easily under long-time heating state
Volatilization；Taken out after sand mold heating be put into casting room process it is cumbersome and there is certain risk, easily forfeiture in the process
Heat, base layer surface temperature during casting is caused not reach requirement.Case above easily causes metal composite face degree of engagement
Deficiency, or even oxide layer is produced, have a strong impact on service life and production safety.
In addition, when making sand mold, used molding sand is usually water-glass sand in the prior art, and water-glass sand is special
Point is intensity height, and bonding force is high, but water-glass sand production cost is high, needs manpower or machinery broken when being unpacked after casting
It is broken, recovery inconvenience, cause whole casting process cost to increase.
The content of the invention
It is an object of the invention to：A kind of vacuum casting electrical heating sandbox is provided and realizes solid metal-liquid using it
The compound casting technique of metal fever, is realized by following technology：
A kind of vacuum casting electrical heating sandbox, including casing, induction coil and water cooling plant, it is characterised in that in casing
Vacuum-pumping tube is provided with, cabinet wall is provided with sealed insulation layer.
Spiral to surround according to casing by hollow seamless steel pipe or copper pipe as the preferred induction coil and form, induction coil one
End is connected with the water inlet of water cooling plant, and the corresponding other end is connected with the delivery port of water cooling plant.
Preferably, it is provided with supporting layer outside the casing.
Preferably, the casing top is provided with hanging hole.
Preferably, the casing is cuboid or cylinder.
A kind of hot compound casting technique of bimetallic for electrical heating sandbox realization of being cast using aforementioned vacuum, including following step
Suddenly：
A. the base layer of composition metal is made；
B. base layer is pre-processed；
C. composite filled layer is made, and pre-production goes out casting gate on composite filled layer, and composite filled layer is pasted onto
The correspondence position of base layer, form product complex；
D. one layer of releasing sand high-strength high temperature-resistant coating is coated in product complex surfaces, coating is finished product after surface drying
Complex is put into electrical heating sandbox；
E. fill dry sand between the cabinet wall and product complex of electrical heating sandbox, reserved at the top of dry sand during filling
Casting gate position, casing is vibrated after filling, dry sand is sufficient filling with space；
F. in one layer of plastic foil of dry sand face seal, and cover one layer of dry sand again on the plastic film and push down plastic foil；
G. start evacuator, dry sand is taken out tightly；
H. start the induction coil of electrical heating sandbox, product complex is heated to preset temperature, makes composite filled layer gas
Change, the position after gasification where former composite filled layer forms high intensity die cavity；
I. liquid metals is poured into by casting gate, makes liquid metals and base layer metal fully compound；
J. induction coil is closed, evacuator is closed after liquid metals cooled and solidified and discharges vacuum；
K. unpack and topple over the composition metal that dry sand takes out shaping, carry out sand removal, polishing and heat treatment.
Preferably, the pretreatment process described in step b, including：Drilled in base layer composite surface, to base layer composite surface
It is polished grinding process and anti-oxidation processing.
Preferably, the anti-oxidation processing, including antioxidizing paint is cleaned and coated using cleaning fluid.
The method have the characteristics that：
1. after metallic base layer is made, metallic base layer is pre-processed, including the punching of base layer composite surface, throwing
Light grinding process, anti-oxidation processing.After the punching of base layer composite surface, liquid metals can be merged preferably with composite surface, cooling
Occlusion degree is stronger afterwards；Composite surface after bright and clean processing is smoother, it is therefore prevented that impurity, which remains in composite surface, causes degrees of fusion inadequate
Problem；Composite surface after anti-oxidation processing is not allowed to be also easy to produce oxide in fusion, further increases the occlusion degree of composite surface.
2. one layer of releasing sand high-strength high temperature-resistant coating is coated with outside product complex, base layer and filled composite layer is whole
Body wraps up, and coating forms a floor height strength enclosure after surface drying, and filled composite layer gasifies after the heating, and script filled composite layer accounts for
According to space formed mold cavity.Therefore the shape of filled composite layer can according to being actually needed, be adjusted to reach required casting
Shape.
3. high using the sand mold compactability of vacuumizing method, will not collapse sand, to casting encapsulation and good fixing effect, and take out true
Noresidue oxygen in empty rear box, therefore the possibility of composite surface generation oxide is reduced, improve occlusion degree.
4. being heated using induction coil around using electromagnetic principle, base layer heating is can guarantee that without dead angle, with heat transfer side
Method is compared, and when composite surface is irregular shape, can be better ensured that the pre-heating temperature of composite surface, be improved compound success rate.
Sand mold, preheating and casting step are made 5. incorporating, whole flow process is concentrated in single equipment and completed, greatly
Production process has been saved, has reduced production risk, has saved production cost.
6. using dry sand when making sand mold, without reusing water-glass sand, production cost has been saved, it is cold in casting
But vacuum is discharged after being molded, dry sand is directly toppled over and can be taken off casting, has saved process, the dry sand rate of recovery is high, while saves
Cost.
7. compared with prior art, whole flow process smog, dust emission are few, energy resource consumption is low, and raw material yield rate is high, reaches
Energy-saving, emission-reducing, environment friendly effect is arrived.
Beneficial effects of the present invention：A kind of method for realizing that solid-liquid bimetallic is compound is provided, whole flow process will be made
Make sand mold, preheating and casting link to integrate and complete in a single device, greatly saved production process and production cost, cast
Part composite surface cleaning oxide-free residual, occlusion degree is high, service life length.Whole technological process has reached energy-saving, emission-reducing, environment friendly effect
Fruit.
Brief description of the drawings
Fig. 1 is the structural representation of electrical heating sandbox used in the present invention；
Fig. 2 is that the schematic diagram of metallic base layer composite surface is；
The product composite bed schematic diagram that Fig. 3 metallic base layers are formed with composite filled layer；
Fig. 4 is that product composite bed is put into schematic diagram when being cast after electrical heating sandbox；
Fig. 5 is the schematic diagram using a kind of gyratory crusher rolled mortar wall bulk-breaking of the technology of the present invention casting；
Fig. 6 is Fig. 5 A-A to top view；
Embodiment
Following non-limiting examples are used to illustrate the present invention.
As shown in figure 1, a kind of vacuum casting electrical heating sandbox, including casing 1, the inwall of casing 1 are provided with sealed insulation layer
2, vacuum-pumping tube 5 is provided with casing 1, and the outer wall of casing 1 is provided with induction coil 3, and induction coil 3 is made up of seamless steel pipe, end
End connects the intake-outlet 6 of water cooling plant, and supporting layer 4 is provided with outside casing 1, and the top of casing 1 is provided with hanging hole 7.
The hot composite casting technology of bimetallic of the present invention uses below scheme：
A. the base layer 8 of composition metal is made；
B. base layer 8 is pre-processed, as shown in Fig. 2 drilling out keying aperture 15 in base layer composite surface 14, makes liquid golden
Category can be merged further with base layer 8, to improve the occlusion degree of base layer composite surface 14, while base layer composite surface 14 be carried out
Polishing grinding, the pretreatment such as antioxidizing paint is coated after being cleaned with cleaning fluid；
C. composite filled layer 9 is made using expandability foamed plastics, and pre-production goes out casting gate on composite filled layer 9
11, composite filled layer 9 is pasted onto the correspondence position of base layer composite surface 14, forms product complex, as shown in Figure 3；
D. one layer of releasing sand high-strength high temperature-resistant coating 10 is coated in product complex surfaces, coating will production after finishing surface drying
Product complex is put into electrical heating sandbox 1；
E. as shown in figure 4, dry sand 13 is filled between the inwall of casing 1 and product complex of electrical heating sandbox, during filling
The position of casting gate 11 is reserved at the top of dry sand, casing 1 is vibrated after filling, dry sand 13 is sufficient filling with space；
F. in dry sand 13 face seal, one layer of plastic foil 12, and one layer of dry sand 13 is covered again on plastic foil 12 and pushes down plastics
Film 12；
G. start evacuator, dry sand 13 is taken out tightly；
H. start the induction coil 3 of electrical heating sandbox 1, product complex is heated to preset temperature, makes composite filled layer 9
Gasification, the position after gasification where former composite filled layer 9 form high intensity die cavity；
I. liquid metals is poured into by casting gate 11, makes liquid metals and the metal of base layer 8 fully compound；
J. induction coil 3 is closed, evacuator is closed after liquid metals cooled and solidified and discharges vacuum；
K. casing 1 is sling using hanging hole 7, unpack topple over dry sand take out shaping composition metal, carry out sand removal, polishing and
Heat treatment.
Fig. 5 and Fig. 6 illustrates a kind of gyratory crusher rolled mortar wall bulk-breaking cast using the technology of the present invention, and rolled mortar wall is broken
Important accessory on broken machine, the crushing wall with being arranged on eccentric shaft are used cooperatively, and rolled mortar wall is fixed during work, and crushing wall is with inclined
Mandrel rotates, and will be crushed for material between the two.Rolled mortar wall turns into consumable accessory due to being contacted firmly with material for a long time, such as
Using the relatively low potassium steel material of hardness, cause inwall wearability undesirable, it is necessary to frequently change；As using other high rigidity
Alloy material, because the outer wall of rolled mortar wall is arranged on disintegrating machine, easily cause outer wall with breaking after broken abrasion work for a long time
The contact surface of broken machine inwall wears.
In order to solve this problem, using a kind of gyratory crusher rolled mortar wall of the technology of the present invention casting, by outside plate 16
Formed with inner panel 17, inner panel 17 uses tungsten-titanium alloy, and hardness is high, it is ensured that wearability, outside plate 16 are carbon steel, relative hardness compared with
It is low, it is ensured that installation accuracy, while a softer matrix is provided for the work of rolled mortar wall, reduce the abrasion with disintegrating machine.
In actual casting, due to being used as base layer using outside plate 16, the product complex made is put into sandbox simultaneously
Completion buries sand and the process such as vacuumizes, and opens induction coil, product complex is heated, packed layer gasification, then by liquid tungsten titanium
Alloy is poured into by casting gate, stops injecting and closing induction coil stopping heating after casting gate is flooded, during this period sandbox
Vacuum shape is inside remained, discharges vacuum after solid-liquid metal freezing, after whole casting completely cooling, casing is sling and toppled over
Casting is taken out after dry sand, carries out post-processing.
Because this product compound shape is complicated, composite area is big, and composite bed became uneven is even, can not using other modes
Ensure whole base layer and composite surface temperature, using the equipment and technique of the present invention, can guarantee that composite surface oxide-free, composite surface
Occlusion degree is high, and compared with conventional products, service life improves 3-4 times.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (2)
- A kind of 1. hot compound casting technique of the bimetallic realized using vacuum casting electrical heating sandbox, it is characterised in that including Following steps：Make the base layer of composition metal；Base layer is pre-processed, including：Drilled in base layer composite surface, burnishing part is polished to base layer composite surface Reason and anti-oxidation processing；Composite filled layer is made, and pre-production goes out casting gate on composite filled layer, and composite filled layer is pasted onto into base layer Correspondence position, formed product complex；One layer of releasing sand high-strength high temperature-resistant coating is coated in product complex surfaces, coating is finished product complex after surface drying It is put into electrical heating sandbox；Fill dry sand between the cabinet wall and product complex of electrical heating sandbox, casting gate is reserved at the top of dry sand during filling Position, casing is vibrated after filling, dry sand is sufficient filling with space；In one layer of plastic foil of dry sand face seal, and cover one layer of dry sand again on the plastic film and push down plastic foil；Start evacuator, dry sand is taken out tightly；Start the induction coil of electrical heating sandbox, product complex is heated to preset temperature, composite filled layer is gasified, gasification The position where former composite filled layer forms high intensity die cavity afterwards；Liquid metals is poured into by casting gate, makes liquid metals and base layer metal fully compound；Induction coil is closed, evacuator is closed after liquid metals cooled and solidified and discharges vacuum；Unpack and topple over the composition metal that dry sand takes out shaping, carry out sand removal, polishing and heat treatment；Wherein used vacuum casting electrical heating sandbox, including casing, induction coil and water cooling plant, it is provided with casing and takes out Vacuum tube, cabinet wall are provided with sealed insulation layer, and the induction coil is spiraled ring by hollow seamless steel pipe or copper pipe according to casing Around into induction coil one end is connected with the water inlet of water cooling plant, the delivery port phase of the corresponding other end and water cooling plant Connect, be provided with supporting layer outside the casing, the casing top is provided with hanging hole, and the casing is cuboid or cylinder Body.
- A kind of 2. compound casting technique of bimetallic heat as claimed in claim 1, it is characterised in that the anti-oxidation processing, Including antioxidizing paint is cleaned and coated using cleaning fluid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510374532.6A CN104972076B (en) | 2015-06-30 | 2015-06-30 | A kind of vacuum casting electrical heating sandbox and the hot composite casting technology of bimetallic using its realization |
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|---|---|---|---|
| CN201510374532.6A CN104972076B (en) | 2015-06-30 | 2015-06-30 | A kind of vacuum casting electrical heating sandbox and the hot composite casting technology of bimetallic using its realization |
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| CN104972076B true CN104972076B (en) | 2017-11-24 |
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| CN104923767A (en) * | 2015-06-30 | 2015-09-23 | 林怀敏 | Vacuum casting electric heating sand box |
| CN109865819A (en) * | 2017-12-01 | 2019-06-11 | 张志国 | A method of it is heated using inductance coil transverse magnetic flux and carries out precast body casting infiltration production ceramic phase reinforcement metal-base composites |
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| JPS55161551A (en) * | 1979-06-06 | 1980-12-16 | Hitachi Ltd | Frame body for vacuum molding |
| CN1262372C (en) * | 2003-08-23 | 2006-07-05 | 吴振卿 | Double metal combining method in sand mould |
| CN101134237B (en) * | 2007-10-11 | 2010-06-30 | 丁家伟 | Reinforcing phase metallic gradient composite material manufacturing process and equipment thereof |
| CN201760582U (en) * | 2010-06-29 | 2011-03-16 | 三一重工股份有限公司 | Double-metal liquid/solid composite casting and pouring equipment |
| CN202278156U (en) * | 2011-10-10 | 2012-06-20 | 泰州市美鑫铸造有限公司 | Sand box moulding plastic coating heater for V-process casting |
| CN102764853B (en) * | 2012-08-10 | 2013-12-18 | 邯郸慧桥复合材料科技有限公司 | Process for induction heating gasification expanded polystyrene (EPS) evaporative pattern casting |
| CN104923767A (en) * | 2015-06-30 | 2015-09-23 | 林怀敏 | Vacuum casting electric heating sand box |
| CN204747465U (en) * | 2015-06-30 | 2015-11-11 | 林怀敏 | Vacuum casting electrical heating sand box |
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