CN112621101A - Method for repairing defect of heat exchange column of cast-silicon-aluminum heat exchanger by utilizing scrapped casting - Google Patents
Method for repairing defect of heat exchange column of cast-silicon-aluminum heat exchanger by utilizing scrapped casting Download PDFInfo
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- CN112621101A CN112621101A CN202011391573.3A CN202011391573A CN112621101A CN 112621101 A CN112621101 A CN 112621101A CN 202011391573 A CN202011391573 A CN 202011391573A CN 112621101 A CN112621101 A CN 112621101A
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- casting
- heat exchange
- exchange column
- heat exchanger
- sleeving
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
Abstract
The invention provides a method for repairing defect of heat exchange column of cast silicon-aluminum heat exchanger by using scrapped casting, belonging to the technical field of casting repair. The repairing method comprises the following steps: s1: drilling a sleeving hole at the position of a defective heat exchange column of the cast-silicon-aluminum heat exchanger casting to be repaired; s2: sawing a lower heat exchange column from a scrapped heat exchanger casting; s3: processing the sleeve joint surface of the heat exchange column to match with the size of the sleeve joint hole; s4: coating high-temperature glue on the sleeved surface of the heat exchange column, and filling the heat exchange column into a sleeved hole of a cast silicon-aluminum heat exchanger casting to be repaired; s5: curing according to the requirements of a high-temperature glue curing process; s6: and (4) detecting the solidified casting according to the pressure resistance detection requirement of the finished product, and warehousing. The method solves the problems of difficult direct welding repair of the defect of the cast silicon-aluminum heat exchanger casting heat exchange column and high casting rejection rate, has simple repair process, meets the use requirements of pressure resistance and high temperature resistance of products, ensures that the repaired part is consistent with the body material and consistent in appearance, and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of casting repair, in particular to a method for repairing the defect of a heat exchange column of a cast-silicon-aluminum heat exchanger by using a discarded casting through sleeving by using high-temperature glue.
Background
A large number of heat exchange columns are staggered on a cast silicon-aluminum heat exchanger casting for a novel gas boiler, and the purpose is to increase the heat exchange surface area and improve the heat exchange efficiency. The heat exchange columns which are densely distributed have thin and high structures, castings are difficult to avoid collision in the production of the procedures of casting, shakeout cleaning, shot blasting, transferring and the like, and the heat exchange columns are broken and damaged. Limited by the structural space of the product, difficult direct welding repair, higher rejection rate caused by the defect of the heat exchange column and increased production cost of enterprises.
Disclosure of Invention
In order to solve the problems, the invention provides a method for repairing the defect of the heat exchange column of the cast silicon-aluminum heat exchanger by utilizing a scrapped casting, which solves the problems of difficult repair and high casting rejection rate by directly using a welding method.
The technical scheme adopted by the invention for solving the technical problem is as follows: the method for repairing the defect of the heat exchange column of the cast-silicon-aluminum heat exchanger by utilizing the scrapped casting comprises the following steps:
s1: processing a sleeve joint hole: drilling a sleeving hole 12 at the position of a defect heat exchange column 11 of a cast silicon-aluminum heat exchanger casting 10 to be repaired;
s2: cutting a column: sawing a lower heat exchange column 21 from the scrapped heat exchanger casting 20;
s3: processing a cylinder sleeve joint surface: processing a sleeving surface of the heat exchange column 21 and matching with the size of the sleeving hole 12;
s4: sleeving: coating high-temperature glue on the sleeving surface of the heat exchange column 21, and filling the high-temperature glue into the sleeving hole 12 of the cast silicon-aluminum heat exchanger casting 10 to be repaired;
s5: and (3) curing: curing according to the requirements of a high-temperature glue curing process;
s6: and (6) inspecting and warehousing finished products: and detecting the solidified casting according to the pressure resistance detection requirement of the finished product, and warehousing after the casting is qualified.
When the heat exchange column body is sawed, the diameter of the sawing circle is larger than the diameter of the heat exchange column body, machining allowance is reserved for machining the sleeving surface, the hole drilled at the position of the defective heat exchange column is a blind hole, the size of the blind hole corresponds to the sleeving surface of the column body, and a sleeving gap is reserved.
The high-temperature glue is a sleeving sealing glue with the heat-resisting temperature higher than the long-term working temperature of the cast silicon-aluminum heat exchanger casting.
The invention has the beneficial effects that: the method for repairing the defect of the cast silicon-aluminum heat exchanger casting heat exchange column by using the high-temperature glue for sleeve joint and using the scrapped casting meets the use requirements of pressure resistance and high temperature resistance of the product, the repair part of the casting is consistent with the body material, the appearance is consistent, the repair process is simple, the efficiency is high, the cost is low, and the waste loss in enterprise production is reduced.
Description of the drawings:
the invention is further explained with reference to the drawings and the embodiments.
FIG. 1 is a flow chart of the repair process of the present invention;
FIG. 2 is a schematic view of a heat exchange column cylinder sawed from a scrapped heat exchanger casting;
FIG. 3 is a schematic diagram of a sleeving hole at the position of a defective heat exchange column of the cast-silicon-aluminum heat exchanger to be repaired;
FIG. 4 is a diagram of socket connection
FIG. 5 is a partial schematic view of a heat exchanger casting after repair is complete.
In the figure: 10. the method comprises the steps of casting the cast silicon-aluminum heat exchanger to be repaired, 11, a defect heat exchange column, 12, a sleeving hole, 20, scrapped heat exchanger casting and 21, wherein the heat exchange column is arranged in the casting.
The specific implementation mode is as follows:
as shown in figure 1, the defect of the cast silicon-aluminum heat exchanger casting heat exchange column is repaired according to the following steps:
s1: processing a sleeve joint hole: selecting a cast silicon-aluminum heat exchanger casting with a defect heat exchange column, polishing the position of the defect heat exchange column of the casting to be repaired to be flat, drilling a sleeve hole, wherein the sleeve hole is a blind hole, the hole depth is one half of the wall thickness of the position, and the hole diameter is the same as the diameter of the heat exchange column;
s2: cutting a column: selecting a scrapped heat exchanger casting with a complete heat exchange column, and sawing the heat exchange column from the scrapped heat exchanger casting, wherein the diameter of a sawing circle of a heat exchange column body is 4mm larger than the diameter of a heat exchange column body during sawing, and a machining allowance is reserved for a machining sleeve joint surface;
s3: processing a cylinder sleeve joint surface: machining the sleeve joint surface of the heat exchange column, wherein the diameter of the machined column body is 0.4-0.5 mm smaller than the bore diameter of the drill hole;
s4: sleeving: selecting a sleeving sealing high-temperature adhesive with the heat-resisting temperature higher than the long-term working temperature of the cast silicon-aluminum heat exchanger casting, coating the sleeving surface of the heat exchange column with the high-temperature adhesive, filling the high-temperature adhesive into a sleeving hole of the cast silicon-aluminum heat exchanger casting to be repaired, and compressing the high-temperature adhesive;
s5: and (3) curing: curing according to the requirements of a high-temperature glue curing process;
s6: and (6) inspecting and warehousing finished products: and detecting the solidified casting according to the pressure resistance detection requirement of the finished product, and warehousing after the casting is qualified.
Claims (3)
1. The method for repairing the defect of the heat exchange column of the cast-silicon-aluminum heat exchanger by using the scrapped casting is characterized by comprising the following steps of: the repairing method comprises the following steps:
s1: processing a sleeve joint hole: drilling a sleeving hole (12) at the position of a defect heat exchange column (11) of a cast silicon-aluminum heat exchanger casting (10) to be repaired;
s2: cutting a column: sawing a lower heat exchange column (21) from a scrapped heat exchanger casting (20);
s3: processing a cylinder sleeve joint surface: machining a sleeving surface of the heat exchange column (21) and matching with the size of the sleeving hole (12);
s4: sleeving: coating high-temperature glue on the sleeving surface of the heat exchange column (21), and filling the high-temperature glue into the sleeving hole (12) of the cast silicon-aluminum heat exchanger casting (10) to be repaired;
s5: and (3) curing: curing according to the requirements of a high-temperature glue curing process;
s6: and (6) inspecting and warehousing finished products: and detecting the solidified casting according to the pressure resistance detection requirement of the finished product, and warehousing after the casting is qualified.
2. The method for repairing the defect of the heat exchange column of the cast-silicon-aluminum heat exchanger by using the scrapped casting as claimed in claim 1, which is characterized in that: when the heat exchange column body is sawed, the diameter of the sawing circle is larger than the diameter of the heat exchange column body, machining allowance is reserved for machining the sleeving surface, the hole drilled at the position of the defective heat exchange column is a blind hole, the size of the blind hole corresponds to the sleeving surface of the column body, and a sleeving gap is reserved.
3. The method for repairing the defect of the heat exchange column of the cast-silicon-aluminum heat exchanger by using the scrapped casting as claimed in claim 1, which is characterized in that: the high-temperature glue is a sleeving sealing glue with the heat-resisting temperature higher than the long-term working temperature of the cast silicon-aluminum heat exchanger casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011391573.3A CN112621101A (en) | 2020-12-03 | 2020-12-03 | Method for repairing defect of heat exchange column of cast-silicon-aluminum heat exchanger by utilizing scrapped casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011391573.3A CN112621101A (en) | 2020-12-03 | 2020-12-03 | Method for repairing defect of heat exchange column of cast-silicon-aluminum heat exchanger by utilizing scrapped casting |
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| Publication Number | Publication Date |
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| CN112621101A true CN112621101A (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011391573.3A Pending CN112621101A (en) | 2020-12-03 | 2020-12-03 | Method for repairing defect of heat exchange column of cast-silicon-aluminum heat exchanger by utilizing scrapped casting |
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Citations (8)
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| DE102006033799A1 (en) * | 2006-07-19 | 2008-01-24 | Mtu Aero Engines Gmbh | Method of repairing turbine blades |
| CN101726211A (en) * | 2008-10-19 | 2010-06-09 | 四平维克斯换热设备有限公司 | High-temperature solidification bonding method of spacer and plate in plate type heat exchanger |
| CN102430889A (en) * | 2011-09-09 | 2012-05-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing crack and chipping of shunt ring of case |
| CN103934626A (en) * | 2014-05-12 | 2014-07-23 | 苏州润德新材料有限公司 | Repair method of NTC multi-wire sawing machine main roller and main roller structure after repair |
| CN103934627A (en) * | 2014-05-12 | 2014-07-23 | 苏州润德新材料有限公司 | Repair method of MB multi-wire sawing machine guide wheel |
| CN205703106U (en) * | 2016-04-15 | 2016-11-23 | 浙江浙能镇海发电有限责任公司 | A kind of prosthetic device for repairing control valve stand base |
| CN108581363A (en) * | 2018-06-21 | 2018-09-28 | 日照钢铁控股集团有限公司 | A kind of Vertical Mill wheel hub restorative procedure |
| CN111571111A (en) * | 2019-02-19 | 2020-08-25 | 珠海盾安热工科技有限公司 | Heat exchange tube maintenance method |
-
2020
- 2020-12-03 CN CN202011391573.3A patent/CN112621101A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006033799A1 (en) * | 2006-07-19 | 2008-01-24 | Mtu Aero Engines Gmbh | Method of repairing turbine blades |
| CN101726211A (en) * | 2008-10-19 | 2010-06-09 | 四平维克斯换热设备有限公司 | High-temperature solidification bonding method of spacer and plate in plate type heat exchanger |
| CN102430889A (en) * | 2011-09-09 | 2012-05-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing crack and chipping of shunt ring of case |
| CN103934626A (en) * | 2014-05-12 | 2014-07-23 | 苏州润德新材料有限公司 | Repair method of NTC multi-wire sawing machine main roller and main roller structure after repair |
| CN103934627A (en) * | 2014-05-12 | 2014-07-23 | 苏州润德新材料有限公司 | Repair method of MB multi-wire sawing machine guide wheel |
| CN205703106U (en) * | 2016-04-15 | 2016-11-23 | 浙江浙能镇海发电有限责任公司 | A kind of prosthetic device for repairing control valve stand base |
| CN108581363A (en) * | 2018-06-21 | 2018-09-28 | 日照钢铁控股集团有限公司 | A kind of Vertical Mill wheel hub restorative procedure |
| CN111571111A (en) * | 2019-02-19 | 2020-08-25 | 珠海盾安热工科技有限公司 | Heat exchange tube maintenance method |
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Application publication date: 20210409 |
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