CN108213345B - A kind of Al-Cu system investment-casting deformation control method that the wall thickness transition of " C " shape is violent - Google Patents
A kind of Al-Cu system investment-casting deformation control method that the wall thickness transition of " C " shape is violent Download PDFInfo
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- CN108213345B CN108213345B CN201810175241.8A CN201810175241A CN108213345B CN 108213345 B CN108213345 B CN 108213345B CN 201810175241 A CN201810175241 A CN 201810175241A CN 108213345 B CN108213345 B CN 108213345B
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- casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Continuous Casting (AREA)
Abstract
The present invention provides a kind of Al-Cu system investment-casting deformation control method that the wall thickness transition of " C " shape is violent, firstly, designing running gate system according to casting structure feature, the cross gate of " half M shape " is designed, in heavy wall position opening, anti-deformation muscle, compacting wax-pattern and combination die group are set；Secondly, the size of adjustment anti-deformation muscle is qualified to " C " type opening size, anti-deformation muscle is removed again after wax pattern is fixed；Finally, carrying out shell processed, the casting of casting according to full form casting process process, retains cross gate identical with casting " C " type opening direction, casting is heat-treated by technique requirement, cross gate is removed after heat treatment.X-ray detection, fluorescence detection and dimension control are carried out to casting.Wax-pattern anti-deformation muscle is removed after of the present invention group of type again, preventing wax-pattern from deforming during mould group group type leads to final casting off-dimension；Cross gate is removed after heat treatment, prevents the deformation of heat treating castings process from causing casting dimension unqualified.
Description
Technical field
The present invention relates to a kind of Al-Cu system investment-casting deformation control methods that the wall thickness transition of " C " shape is violent.
Background technique
With the rapid development of China's field of aerospace, aerospace is with casting also gradually to integration, lightweight hair
Exhibition, therefore aluminium alloy investment-casting is used widely.
Al-Cu line aluminium alloy is widely applied with its excellent mechanical property, but Al-Cu system crystallization range
Width belongs to typical mushy freezing, and casting manufacturability is poor, the defects of shrinkage cavity, crackle easily occurs.Especially when casting structure is wall thickness
Transition is violent, and each size wall thickness transition is violent, and when casting global shape is that " C " shape is open, casting is easier to shedding deformation occur, split
The defects of line.
The qualification rate that domestic casting producer produces such part at present is generally relatively low, and scrapping reason is mainly c-shaped opening portion
Unilateral inward-facing (outer) the offset 2mm-4mm in position or c-shaped opening integrally offset to one side 2mm-4mm, lead to casting qualified rate deficiency
20%, cause the serious waste of production cost and the extension of production cycle.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of Al-Cu system fusible pattern casting that the wall thickness transition of " C " shape is violent
Part deformation control method improves casting qualified rate, reduces production cost.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of Al-Cu system investment-casting deformation control method that the wall thickness transition of " C " shape is violent, comprising the following steps:
Step 1: running gate system being designed according to casting structure feature, the cross gate of " half M shape " is designed, at heavy wall position
Anti-deformation muscle is arranged in opening, wherein the direction of cross gate is consistent with casting " C " type opening direction.
Step 2: compacting wax-pattern removes wax pattern surface burr and other defects, according to the running gate system group determined in step 1
Molding group, the anti-deformation muscle of opening setting is for preventing wax-pattern from deforming.
Step 3: after the completion of the combination of mould group, measuring critical size, size to " C " the type opening size for adjusting anti-deformation muscle closes
Lattice remove the anti-deformation muscle for preventing wax-pattern from deforming in step 2 after wax pattern is fixed again, prevent thin and thick junction cracked.
Step 4: carrying out shell processed, the casting of casting according to full form casting process process, retain and casting " C " type opening direction
1 identical cross gate.
Step 5: casting being heat-treated by technique requirement, heat treatment parameter are as follows: 548 DEG C~550 DEG C of heating temperature, protect
Warm time 12.5h~13.5h quenches 60 DEG C of water temperature；150 DEG C~160 DEG C of aging temp, soaking time 4.5h~5.5h.At heat
Cross gate is removed after reason again, prevents the deformation of heat treating castings process from causing casting dimension unqualified.
Step 6: X-ray detection, fluorescence detection and dimension control are carried out to casting.
The invention has the benefit that 1) remove wax-pattern anti-deformation muscle after group type again, prevent wax-pattern in mould group group type process
Middle deformation leads to final casting off-dimension.2) after the removal of wax-pattern anti-deformation muscle, casting body distortion is unfettered, reduces casting
The probability of defect is cracked at part wall thickness sharp transition.3) casting moulding system removes after heat treatment, prevents at casting heat
The deformation of reason process causes casting dimension unqualified.
Detailed description of the invention
Fig. 1 is casting and running gate system schematic diagram；
In figure: 1 casting " C " type opening direction；2 cross gates；3 anti-deformation muscle.
Specific embodiment
The present invention will be further described below with reference to the accompanying drawings, is with certain type machine Al-Cu series high strength aluminum alloy junction component
Example, specific step is as follows for implementation:
Step 1: running gate system being designed according to casting structure feature, such as Fig. 1 designs the cross gate 2 of " half M shape ", in thickness
Anti-deformation muscle 3 is arranged in wall site opening, wherein the direction of cross gate 2 is consistent with casting " C " type opening direction 1.
Step 2: compacting wax-pattern removes wax pattern surface burr and other defects, according to the running gate system group determined in step 1
Molding group, and anti-deformation muscle 3 is set in 14mm wall thickness opening, prevent wax-pattern from deforming；Opening size meets 272 ± 1.1mm.
Step 3: after the completion of the combination of mould group, size to " C " the type opening size for adjusting anti-deformation muscle 3 meets 272 ± 1.1mm
Afterwards, the anti-deformation muscle 3 for preventing wax-pattern from deforming in step 2 is removed again after wax pattern is fixed, prevent thin and thick junction cracked.
Step 4: carrying out shell processed, the casting of casting according to full form casting process process, retain and casting " C " type opening direction
1 identical cross gate.
Step 5: casting being heat-treated by technique requirement, heat treatment parameter are as follows: 548 DEG C~550 DEG C of heating temperature, protect
Warm time 13h quenches 60 DEG C of water temperature；155 DEG C of aging temp, soaking time 5h.Cross gate 2 is removed after heat treatment again, prevents from casting
The deformation of part heat treatment process causes casting dimension unqualified, and detection opening size, meets 272 ± 1.1mm.
Step 6: X-ray detection, fluorescence detection and dimension control are carried out to casting.
The casting produced in this way does not generate fire check, deformation defect, through fluorescence detection, X-ray detection, table
Face quality and internal metallurgical quality reach HB963, II class casting standard, and casting opening size is met the requirements, casting qualified rate
100% has been increased to less than 20% by original.
Claims (1)
1. a kind of Al-Cu system investment-casting deformation control method that the wall thickness transition of " C " shape is violent, it is characterised in that including following step
It is rapid:
Step 1: running gate system being designed according to casting structure feature, the cross gate (2) of " half M shape " is designed, is opened at heavy wall position
Anti-deformation muscle (3) are set at mouthful, wherein the direction of cross gate (2) is consistent with casting " C " type opening direction (1)；
Step 2: compacting wax-pattern removes wax pattern surface burr and other defects, according to the running gate system combination die determined in step 1
Group, the anti-deformation muscle (3) of opening setting is for preventing wax-pattern from deforming；
Step 3: after the completion of the combination of mould group, the size for adjusting anti-deformation muscle (3) is qualified to " C " type opening size, fixes to wax pattern
It removes the anti-deformation muscle (3) for preventing wax-pattern from deforming in step 2 again afterwards, prevents thin and thick junction cracked；
Step 4: carrying out shell processed, the casting of casting according to full form casting process process, retain and casting " C " type opening direction (1)
Identical cross gate；
Step 5: casting being heat-treated by technique requirement, heat treatment parameter are as follows: 548 DEG C~550 DEG C of heating temperature, when heat preservation
Between 12.5h~13.5h, quench 60 DEG C of water temperature；150 DEG C~160 DEG C of aging temp, soaking time 4.5h~5.5h；After heat treatment
Cross gate (2) are removed again, prevent the deformation of heat treating castings process from causing casting dimension unqualified；
Step 6: X-ray detection, fluorescence detection and dimension control are carried out to casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810175241.8A CN108213345B (en) | 2018-03-02 | 2018-03-02 | A kind of Al-Cu system investment-casting deformation control method that the wall thickness transition of " C " shape is violent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810175241.8A CN108213345B (en) | 2018-03-02 | 2018-03-02 | A kind of Al-Cu system investment-casting deformation control method that the wall thickness transition of " C " shape is violent |
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| Publication Number | Publication Date |
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| CN108213345A CN108213345A (en) | 2018-06-29 |
| CN108213345B true CN108213345B (en) | 2019-10-08 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202018A (en) * | 2018-09-20 | 2019-01-15 | 贵州安吉航空精密铸造有限责任公司 | A kind of the precision-investment casting Deformation control technique and its mold of casting |
| CN109317613B (en) * | 2018-11-16 | 2020-09-29 | 中国科学院金属研究所 | Shell preparation method for preventing bending deformation of directional test bar |
| CN113560505A (en) * | 2021-07-20 | 2021-10-29 | 四川省柏均机械制造有限责任公司 | Anti-deformation machining method for wear-resistant ring |
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| US4609028A (en) * | 1984-06-20 | 1986-09-02 | Outboard Marine Corporation | Evaporative pattern assembly for use in sand casting |
| CN102228956A (en) * | 2011-07-11 | 2011-11-02 | 宝鸡中铁宝桥天元实业发展有限公司 | Precision fire mould casting process of series sliding bed bedplates for turnouts of high-speed railway lines for passenger transport and special die |
| CN102717031A (en) * | 2012-07-02 | 2012-10-10 | 山西模范机械制造有限公司 | Large-scale thin-wall valve body lost foam casting process |
| CN204545326U (en) * | 2015-04-21 | 2015-08-12 | 宁波全力机械模具有限公司 | A kind of alloy electric machine overcoat pouring cup device |
| CN206083763U (en) * | 2016-07-08 | 2017-04-12 | 陕西飞机工业（集团）有限公司 | Aircraft rack part wax matrix structure |
| CN106734881A (en) * | 2016-12-22 | 2017-05-31 | 中国船舶重工集团公司第十二研究所 | A kind of method for preventing smart casting machine casket wax-pattern deformation |
-
2018
- 2018-03-02 CN CN201810175241.8A patent/CN108213345B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4609028A (en) * | 1984-06-20 | 1986-09-02 | Outboard Marine Corporation | Evaporative pattern assembly for use in sand casting |
| CN102228956A (en) * | 2011-07-11 | 2011-11-02 | 宝鸡中铁宝桥天元实业发展有限公司 | Precision fire mould casting process of series sliding bed bedplates for turnouts of high-speed railway lines for passenger transport and special die |
| CN102717031A (en) * | 2012-07-02 | 2012-10-10 | 山西模范机械制造有限公司 | Large-scale thin-wall valve body lost foam casting process |
| CN204545326U (en) * | 2015-04-21 | 2015-08-12 | 宁波全力机械模具有限公司 | A kind of alloy electric machine overcoat pouring cup device |
| CN206083763U (en) * | 2016-07-08 | 2017-04-12 | 陕西飞机工业（集团）有限公司 | Aircraft rack part wax matrix structure |
| CN106734881A (en) * | 2016-12-22 | 2017-05-31 | 中国船舶重工集团公司第十二研究所 | A kind of method for preventing smart casting machine casket wax-pattern deformation |
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| CN108213345A (en) | 2018-06-29 |
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