CN110760715A - Method for accurately detecting size of inner cavity of shell of high-temperature alloy precision casting - Google Patents
Method for accurately detecting size of inner cavity of shell of high-temperature alloy precision casting Download PDFInfo
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- CN110760715A CN110760715A CN201911196393.7A CN201911196393A CN110760715A CN 110760715 A CN110760715 A CN 110760715A CN 201911196393 A CN201911196393 A CN 201911196393A CN 110760715 A CN110760715 A CN 110760715A
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- shell
- tin
- casting
- bismuth alloy
- pouring
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C13/00—Alloys based on tin
- C22C13/02—Alloys based on tin with antimony or bismuth as the next major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
- B22C1/188—Alkali metal silicates
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
- G01B11/005—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates coordinate measuring machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention relates to the technical field of high-temperature alloy precision casting, in particular to a method for accurately detecting the size of an inner cavity of a shell of a high-temperature alloy precision casting. According to the method, a shell is poured by a tin-bismuth alloy according to a specific pouring method and specific parameters, a tin-bismuth alloy casting which accurately replicates the inner cavity of the shell is obtained after the shell is removed, and then the size of the tin-bismuth alloy casting is detected, so that the size data of the inner cavity of the shell is obtained. The technology of the invention can accurately copy the size of the inner cavity of the shell, the surface of the obtained tin-bismuth alloy casting is smooth and fine, and the tin-bismuth alloy casting can be measured by adopting an optical measuring instrument or a three-coordinate measuring machine to obtain accurate size data of the inner cavity of the shell. The technology of the invention is simple and efficient to operate, and can be popularized and applied in a large range.
Description
Technical Field
The invention relates to the technical field of high-temperature alloy precision casting, in particular to a method for accurately detecting the size of an inner cavity of a shell of a high-temperature alloy precision casting.
Background
High temperature alloy precision castings (hereinafter castings) are generally formed by pouring high temperature alloy liquid into a shell, and the size of the casting is directly related to the size of the inner cavity of the shell. In the casting size shaping process, the casting size is often out of tolerance, and the size of the inner cavity of the shell needs to be checked again at this time, but a feasible accurate inspection method is not available at present. The existing method for determining the size of the cavity of the shell by adopting the resin casting shell is difficult to obtain a perfect resin part, the surface of the resin part is very rough, burrs are numerous, the cavity of the shell cannot be accurately copied, reliable data reference cannot be provided for quantitative analysis of the size of the cavity of the shell, and assistance is difficult to be provided for size shaping of a high-temperature alloy precision casting.
Disclosure of Invention
The invention aims to provide a method for accurately detecting the size of an inner cavity of a shell of a high-temperature alloy precision casting, solves the problem that the size of the inner cavity of the shell of the high-temperature alloy precision casting cannot be accurately detected, and can provide accurate data reference for the size shaping of the high-temperature alloy precision casting.
The technical scheme of the invention is as follows:
a method for accurately detecting the size of an inner cavity of a shell of a high-temperature alloy precision casting comprises the following steps:
1) selecting the tin-bismuth-containing alloy with the weight ratio of 6: 4, weighing the tin-bismuth alloy block for later use;
2) according to the weight of the tin-bismuth alloy, a 10kg turnover furnace or a 30kg medium-frequency induction furnace is adopted, the temperature is set to be 280-320 ℃, and the tin-bismuth alloy is melted for standby;
3) selecting a high-temperature alloy precision casting shell, and carrying out the following treatment:
if the casting is a structural part, taking a sand box to fill sand into the shell and fix the shell, enabling the pouring cup of the shell to face upwards, pouring the fully molten tin-bismuth alloy into the shell along the pouring cup of the shell at a pouring speed controlled to be 1.5 kg/s-2.5 kg/s, standing the shell after pouring, and naturally cooling the shell for later use;
if the casting is a directional blade or a single crystal blade, preparing a binder, and mixing the materials in a mass ratio of 1: (1.5-2.5) putting the water glass and the bauxite powder for casting into a container, stirring and mixing until the mixture is pasty, plugging a shell pouring cup by using a pasty binder, drying, taking a sand box to fill and fix the shell after the binder is fully hardened, pouring fully melted tin-bismuth alloy into the shell one by one along a disc crystalline pore at the bottom of the shell with the shell pouring cup facing downwards, controlling the pouring speed to be 0.5-1.5 kg/s, standing after pouring, and naturally cooling for later use;
4) removing shells of the tin-bismuth alloy pieces by a method combining manual beating and grinding with a grinding wheel;
5) carrying out optical scanning detection or three-coordinate detection on the tin-bismuth alloy casting to determine size data of the tin-bismuth alloy casting;
6) and comparing and analyzing the size data of the tin-bismuth alloy casting with the standard casting model to determine whether the size of the shell is out of tolerance.
The invention has the advantages and beneficial effects that:
1. the technology of the invention can accurately copy the size of the inner cavity of the shell, the surface of the obtained tin-bismuth alloy casting is smooth and fine, and the tin-bismuth alloy casting can be measured by adopting an optical measuring instrument or a three-coordinate measuring machine to obtain accurate size data of the inner cavity of the shell. The technology of the invention is simple and efficient to operate, and can be popularized and applied in a large range. Therefore, whether the size of the inner cavity of the shell of the high-temperature alloy casting is out of tolerance or not can be determined quickly and efficiently, quantitative data reference is provided for size shaping of the high-temperature alloy precision casting, the size shaping period of the casting is greatly shortened, and the research and development cost of the casting is reduced.
2. The invention provides a technology for accurately inspecting the inner cavity of a shell, which comprises the steps of pouring the shell by using a tin-bismuth alloy according to a specific pouring method and specific parameters, removing the shell to obtain a tin-bismuth alloy casting for accurately copying the inner cavity of the shell, and then detecting the size of the tin-bismuth alloy casting to further obtain the size data of the inner cavity of the shell.
3. The demand of high-temperature alloy precision castings is increased year by year, and after the technology provided by the invention is used, accurate data reference can be provided for analysis of reasons for casting dimension out-of-tolerance, the casting dimension shaping period is shortened, and the development cost is reduced. The technology is applied to the size out-of-tolerance analysis process of a certain high-guide blade, the reason of the size out-of-tolerance of the casting is effectively determined, the size shaping period and the development cost of the casting are greatly shortened, and the technology can be popularized and applied to the size shaping of castings of complex structural parts, blades and the like.
Detailed Description
Examples
In this embodiment, taking a certain high guide vane shell as an example:
1) selecting a material containing 6% of tin and bismuth by weight according to the weight of alloy required by a certain high-guide vane shell to be inspected: 4, weighing 7kg of the tin-bismuth alloy block for later use;
2) according to the weight of the tin-bismuth alloy of 7kg, a 10kg turnover furnace is adopted, the temperature is set to 300 ℃, the tin-bismuth alloy is melted, the tin-bismuth alloy is fully melted, and the 10kg turnover furnace is continuously electrified for standby;
3) selecting a certain high-guide blade as a directional blade, preparing a binder, and taking the components in a mass ratio of 1: 3, stirring and mixing the water glass and the bauxite powder for casting in a container, stirring the mixture to be pasty, then plugging a pouring cup of a high-guide-blade type shell by using a pasty adhesive, drying the mixture, taking a sand box to fill and fix the shell after the adhesive is fully hardened, pouring the fully molten tin-bismuth alloy into the shell one by one along a disc crystalline hole at the bottom of the shell with the pouring speed controlled to be 0.5kg/s to 1.5kg/s with the pouring cup facing downwards, standing the mixture after pouring, and naturally cooling the mixture for later use.
4) And removing the shell of the runner part on the shell by adopting a manual beating method, then shelling the tin bismuth alloy casting by using a grinding wheel polishing method, and polishing the shell of the tin bismuth alloy casting to prevent the tin alloy casting from being damaged and ensure that the shell is removed completely.
5) And carrying out optical scanning detection or three-coordinate detection on the tin-bismuth alloy casting to determine the size data of the tin-bismuth alloy casting.
6) And comparing and analyzing the size data of the tin-bismuth alloy casting with the standard casting model to determine whether the size of the shell is out of tolerance.
The embodiment result shows that the technology is applied to the process of analyzing the dimension out-of-tolerance of a certain height guide vane basin, the reason of the dimension out-of-tolerance is quickly found, the dimension setting period is shortened by over 80 percent, and a large amount of development cost is reduced. After the technology is popularized and applied, the research and development efficiency of the high-temperature alloy precision casting can be effectively improved, and the research and development cost is reduced.
Claims (1)
1. The method for accurately detecting the size of the inner cavity of the shell of the high-temperature alloy precision casting is characterized by comprising the following steps of:
1) selecting the tin-bismuth-containing alloy with the weight ratio of 6: 4, weighing the tin-bismuth alloy block for later use;
2) according to the weight of the tin-bismuth alloy, a 10kg turnover furnace or a 30kg medium-frequency induction furnace is adopted, the temperature is set to be 280-320 ℃, and the tin-bismuth alloy is melted for standby;
3) selecting a high-temperature alloy precision casting shell, and carrying out the following treatment:
if the casting is a structural part, taking a sand box to fill sand into the shell and fix the shell, enabling the pouring cup of the shell to face upwards, pouring the fully molten tin-bismuth alloy into the shell along the pouring cup of the shell at a pouring speed controlled to be 1.5 kg/s-2.5 kg/s, standing the shell after pouring, and naturally cooling the shell for later use;
if the casting is a directional blade or a single crystal blade, preparing a binder, and mixing the materials in a mass ratio of 1: (1.5-2.5) putting the water glass and the bauxite powder for casting into a container, stirring and mixing until the mixture is pasty, plugging a shell pouring cup by using a pasty binder, drying, taking a sand box to fill and fix the shell after the binder is fully hardened, pouring fully melted tin-bismuth alloy into the shell one by one along a disc crystalline pore at the bottom of the shell with the shell pouring cup facing downwards, controlling the pouring speed to be 0.5-1.5 kg/s, standing after pouring, and naturally cooling for later use;
4) removing shells of the tin-bismuth alloy pieces by a method combining manual beating and grinding with a grinding wheel;
5) carrying out optical scanning detection or three-coordinate detection on the tin-bismuth alloy casting to determine size data of the tin-bismuth alloy casting;
6) and comparing and analyzing the size data of the tin-bismuth alloy casting with the standard casting model to determine whether the size of the shell is out of tolerance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196393.7A CN110760715B (en) | 2019-11-29 | 2019-11-29 | Method for accurately detecting size of inner cavity of shell of high-temperature alloy precision casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196393.7A CN110760715B (en) | 2019-11-29 | 2019-11-29 | Method for accurately detecting size of inner cavity of shell of high-temperature alloy precision casting |
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| Publication Number | Publication Date |
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| CN110760715A true CN110760715A (en) | 2020-02-07 |
| CN110760715B CN110760715B (en) | 2021-04-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6075504A (en) * | 1983-09-30 | 1985-04-27 | Toshiba Corp | Production of low melting alloy for sealing fluorescent lamp |
| EP1103337A1 (en) * | 1999-11-25 | 2001-05-30 | Mitsui Mining & Smelting Co., Ltd. | Tin-bismuth-based lead-free solder |
| CN102169518A (en) * | 2011-03-24 | 2011-08-31 | 西北工业大学 | Accurate forming method for precise-casting turbine blade die cavity |
| CN109513881A (en) * | 2018-11-27 | 2019-03-26 | 安徽应流航源动力科技有限公司 | A kind of casting method for the single crystal super alloy blade that smart can control three-dimensional crystal orientation |
| CN110052583A (en) * | 2019-03-15 | 2019-07-26 | 启东市聚旺铸造有限公司 | Precise casting process of hollow guide blade |
-
2019
- 2019-11-29 CN CN201911196393.7A patent/CN110760715B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6075504A (en) * | 1983-09-30 | 1985-04-27 | Toshiba Corp | Production of low melting alloy for sealing fluorescent lamp |
| EP1103337A1 (en) * | 1999-11-25 | 2001-05-30 | Mitsui Mining & Smelting Co., Ltd. | Tin-bismuth-based lead-free solder |
| CN102169518A (en) * | 2011-03-24 | 2011-08-31 | 西北工业大学 | Accurate forming method for precise-casting turbine blade die cavity |
| CN109513881A (en) * | 2018-11-27 | 2019-03-26 | 安徽应流航源动力科技有限公司 | A kind of casting method for the single crystal super alloy blade that smart can control three-dimensional crystal orientation |
| CN110052583A (en) * | 2019-03-15 | 2019-07-26 | 启东市聚旺铸造有限公司 | Precise casting process of hollow guide blade |
Non-Patent Citations (1)
| Title |
|---|
| 徐克玷: "《钼的材料科学与工程》", 31 July 2014 * |
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