CN110721944B - Method for cleaning channel blockage of casting with elongated bent channel - Google Patents
Method for cleaning channel blockage of casting with elongated bent channel Download PDFInfo
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- CN110721944B CN110721944B CN201910904437.0A CN201910904437A CN110721944B CN 110721944 B CN110721944 B CN 110721944B CN 201910904437 A CN201910904437 A CN 201910904437A CN 110721944 B CN110721944 B CN 110721944B
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- blockage
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- dredging
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- 238000005266 casting Methods 0.000 title claims abstract description 28
- 238000004140 cleaning Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000011148 porous material Substances 0.000 claims abstract description 32
- 239000013307 optical fiber Substances 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 4
- 239000004576 sand Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005498 polishing Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010146 3D printing Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005495 investment casting Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Endoscopes (AREA)
Abstract
The invention relates to a method for cleaning pore channel blockage of a casting with a slender and bent pore channel, which comprises the following steps: s1, detecting the blockage condition in the bent pore passage by using an industrial optical fiber endoscope, and judging the blockage reason; s2, heating, preserving heat and dredging when the part is blocked by the sand core; under the condition that the part blockage reason is the blockage of cast metal, a flexible shaft with a drill bit is used for processing and dredging; s3, flushing and polishing after dredging; and S4, detecting by using an industrial optical fiber endoscope, and judging the dredging effect. The method for cleaning the blockage of the channel adopts different dredging solutions aiming at different reasons of the blockage problem after the casting of the bent channel, and the adopted scheme is scientific and reasonable and can achieve better blockage cleaning effect.
Description
Technical Field
The invention belongs to the technical field of precision casting and forming, relates to a channel blockage treatment technology, and particularly relates to a channel blockage cleaning method for a casting with a slender bent channel.
Background
In order to compress the structural space, the long-endurance inertial navigation system cannot add a temperature control structure outside a conventional shell, only can design temperature control in the appearance range of a casting shell, and an air channel required by the temperature control system can only utilize the shell casting due to the structural limitation, so that the support wall of the original solid structure is cast into a honeycomb pipeline structure form, and the honeycomb pipeline structure has the functions of supporting and ventilation.
This places very high demands on the design and casting of the casting: the rigidity of the system support is ensured, and the ventilation and heat transfer requirements of temperature control are also ensured. Therefore, after various investigation and negotiation, the casting is determined to adopt a 3D printing sand mold precision casting process. The casting method for selecting the 3D printing sand model mainly considers that the sand mould can be scattered and flow out along with water flow after the sand mould is washed by a high-pressure water gun, but in actual operation, some air channels cannot be completely opened. The reason is that the air duct is 38 slender sand cores during 3D printing, the strength of the sand cores is low, the sand cores are very easy to deform during re-pouring, and phenomena of breakage, large-amplitude position shifting and the like occur for multiple times in the initial stage, so that multiple castings are scrapped, and the solution is to improve the strength of the sand cores. However, the problem is that the common high-pressure water gun cannot completely clear sand, which is also an important reason for the occurrence of air duct obstruction.
In addition, through inspection, the sand core is damaged and even broken in the casting process, so that metal fins and even a thin metal interlayer can be formed after casting, the sand core is not easy to flow out of the cavity, and X-ray flaw detection is not easy to find as long as the sand core is not subjected to large displacement after breakage.
Through patent retrieval, no relevant patent for a sand cleaning method of a slender bent duct and a processing method for removing redundant materials through machining in the bent duct exists in China.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for cleaning the blockage of the duct of a casting with a slender and bent duct, which has scientific and reasonable design and can achieve better blockage cleaning effect.
The above object of the present invention is achieved by the following technical solutions:
a method of cleaning a cell blockage in a casting having an elongated curved cell, comprising the steps of:
s1, detecting the blockage condition in the bent pore passage by using an industrial optical fiber endoscope, and judging the blockage reason;
s2, when the part is blocked by the sand core, the blocked part is placed in an incubator for heating and heat preservation, and then is naturally cooled, so that the sand at the blocked part is scattered, and the pore channel is dredged; under the condition that the part blockage reason is the blockage of casting metal, welding a drill bit at the shaft end of the steel wire flexible shaft, extending the modified flexible shaft and the drill bit into the pore channel, driving the other end of the flexible shaft by a motor and a speed regulating device for processing, drilling the blockage metal, and dredging the pore channel;
s3, after S2 dredging, washing residual sand and other foreign matters by a high-pressure water gun, connecting a steel wire brush with a flexible shaft, and extending into the pore channel to repeatedly scrub and polish the inner wall; finally, stretching the cloth strips into the pore channels, pulling the two ends, stretching back and forth, and finishing cleaning when the cloth strips are basically free of stains;
s4, re-probing with a fiber optic endoscope after cleaning, checking whether the requirement is met, if so, completing dredging and cleaning, otherwise, repeating the steps.
In addition, the industrial optical fiber endoscopes adopted in S1 and S4 are Micro USB interface optical fiber endoscopes, the Micro USB interface optical fiber endoscopes are driven and controlled by a mobile phone or a computer, the outer diameter of the detection head is smaller than phi 5mm, and the connecting line is not shorter than 1 m.
In addition, the temperature of the parts in the S2 in the heat preservation box is raised to 150 ℃ and is preserved for 4 hours.
Moreover, the size of the flexible shaft in S2 is as follows: the diameter is 3-5mm, and the length is 500 mm; the diameter of the drill bit is 8mm, and the length of the drill bit is about 10 mm; the motor power is 500 w.
The invention has the advantages and positive effects that:
1. the design of the invention adopts different dredging solutions aiming at different reasons of the blockage problem after the casting of the bent duct, and the adopted scheme is scientific and reasonable and can achieve better blockage clearing effect.
2. The principle of heating and removing the residual sand selected by the invention is as follows: the sand for the sand mold is doped with the adhesive during casting and molding, the adhesive loses efficacy at high temperature, the sand is not bonded together any more and is easy to loosen and fall off, and therefore the effect of removing residual sand is achieved.
3. The invention adopts the steel wire flexible shaft as a force transmission path to transmit the torque of the motor to an executing tool (a drill bit and a steel wire brush), thereby achieving the purpose of machining in a bent pore channel and further realizing the blockage of the pore channel caused by metal residue.
4. The invention solves the problem of blockage of the bent pore passage and also provides a simple and feasible on-site detection and judgment method.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic view of a USB fiber optic endoscope employed in the present invention;
FIG. 3 is a schematic view of the connection between a steel wire flexible shaft and a drill bit adopted by the invention;
FIG. 4 is a schematic diagram of a steel wire flexible shaft structure adopted by the invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative only and not limiting, and the scope of the present invention is not limited thereby.
A method for cleaning channel blockage of a casting having elongated and curved channels, as shown in fig. 1-4, the method comprises the following steps:
s1, detecting the blockage condition in the bent pore passage by using an industrial optical fiber endoscope, and judging the blockage reason;
s2, when the part is blocked by the sand core, the blocked part is placed in an incubator for heating and heat preservation, and then is naturally cooled, so that the sand at the blocked part is scattered, and the pore channel is dredged; under the condition that the part blockage reason is the blockage of cast metal, welding a drill bit 2 at the shaft end of a steel wire flexible shaft 3, extending the modified flexible shaft and the drill bit into the pore channel, and processing the other end of the flexible shaft by driving of a motor and a speed regulating device to drill the blocked metal and dredge the pore channel;
s3, after S2 dredging, washing residual sand and other foreign matters by a high-pressure water gun, connecting a steel wire brush with a flexible shaft, and extending into the pore channel to repeatedly scrub and polish the inner wall; finally, stretching the cloth strips into the pore channels, pulling the two ends, stretching back and forth, and finishing cleaning when the cloth strips are basically free of stains;
s4, re-probing with a fiber optic endoscope after cleaning, checking whether the requirement is met, if so, completing dredging and cleaning, otherwise, repeating the steps.
In the method, the industrial optical fiber endoscope adopted in S1 and S4 adopts a Micro USB interface optical fiber endoscope 1 which mainly comprises an optical fiber camera 1-1, an optical fiber and sheath 1-2 and a USB conversion joint 1-3, the industrial optical fiber endoscope is driven and controlled by a mobile phone or a computer, the outer diameter of the detection head is less than phi 5mm, and the connecting line is not less than 1 m. And (3) extending the detecting head into the pore channel, and adjusting the light intensity and the angle to obtain an image in the pore channel. In S1, whether the cause of the clogging is the clogging of the sand core or the clogging of the cast metal is judged from the image. In S4, whether the cleaning in the pore canal is up to the requirement is judged through the image.
In the method, the temperature of the part in the S2 is raised to 150 ℃ in an insulation box, and the insulation is carried out for 4 hours.
In the above method, for the shell casting submitted in the background art, the size of the flexible shaft in S2 is: the diameter is 3-5mm, and the length is 500 mm; the diameter of the drill bit is 8mm, and the length of the drill bit is about 10 mm; the motor power is about 500 w.
Comprehensively, the method for clearing the blockage of the pore channel firstly extends into the pore channel through the endoscope to judge the blockage reasons, and then adopts different dredging methods aiming at different blockage reasons; after dredging, washing and polishing the pore; and finally, extending the pipe into the duct through an endoscope, and detecting the blockage removing condition of the duct until the blockage removing condition of the duct meets the qualified requirement. The method for cleaning the blockage of the pore channel provides a better solution for the blockage cleaning of the casting with the slender and bent pore channel, and the survival rate of the casting is improved to a great extent.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (4)
1. A method of cleaning a cell blockage in a casting having an elongated curved cell, comprising the steps of:
s1, detecting the blockage condition in the bent pore passage by using an industrial optical fiber endoscope, and judging the blockage reason;
s2, when the part is blocked by the sand core, the blocked part is placed in an incubator for heating and heat preservation, and then is naturally cooled, so that the sand at the blocked part is scattered, and the pore channel is dredged; under the condition that the part blockage reason is the blockage of casting metal, welding a drill bit at the shaft end of the steel wire flexible shaft, extending the modified flexible shaft and the drill bit into the pore channel, driving the other end of the flexible shaft by a motor and a speed regulating device for processing, drilling the blockage metal, and dredging the pore channel;
s3, after S2 dredging, washing residual sand and other foreign matters by a high-pressure water gun, connecting a steel wire brush with a flexible shaft, and extending into the pore channel to repeatedly scrub and polish the inner wall; finally, stretching the cloth strips into the pore channels, pulling the two ends, stretching back and forth, and finishing cleaning when the cloth strips are basically free of stains;
s4, re-probing with a fiber optic endoscope after cleaning, checking whether the requirement is met, if so, completing dredging and cleaning, otherwise, repeating the steps.
2. A method of cleaning cell plugging in a casting having elongated curved cells according to claim 1, wherein: the industrial optical fiber endoscopes adopted in S1 and S4 are Micro USB interface optical fiber endoscopes, are driven and controlled by a mobile phone or a computer, the outer diameter of the detecting head is smaller than phi 5mm, and the connecting line is not shorter than 1 m.
3. A method of cleaning cell plugging in a casting having elongated curved cells according to claim 1, wherein: and (5) heating the parts in the S2 to 150 ℃ in an insulation box, and keeping the temperature for 4 hours.
4. A method of cleaning cell plugging in a casting having elongated curved cells according to claim 1, wherein: the size of the flexible shaft in S2 is as follows: the diameter is 3-5mm, and the length is 500 mm; the diameter of the drill bit is 8mm, and the length of the drill bit is 10 mm; the motor power is 500 w.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910904437.0A CN110721944B (en) | 2019-09-24 | 2019-09-24 | Method for cleaning channel blockage of casting with elongated bent channel |
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| CN201910904437.0A CN110721944B (en) | 2019-09-24 | 2019-09-24 | Method for cleaning channel blockage of casting with elongated bent channel |
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| CN110721944A CN110721944A (en) | 2020-01-24 |
| CN110721944B true CN110721944B (en) | 2022-02-18 |
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| CN201910904437.0A Active CN110721944B (en) | 2019-09-24 | 2019-09-24 | Method for cleaning channel blockage of casting with elongated bent channel |
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| CN112588734B (en) * | 2020-12-03 | 2022-04-01 | 河南省西交轻质合金新材料研究院有限公司 | Method for treating blockage problem of magnesium alloy liquid transfer pipe |
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| CN102794284A (en) * | 2012-08-10 | 2012-11-28 | 中铁隧道集团有限公司 | Dredge device of annular embedded corrugated pipe duct and dredge method thereof |
| CN202715556U (en) * | 2012-08-16 | 2013-02-06 | 桐乡合德机械有限公司 | Casting thin and long hole cleaning tool |
| CN203304217U (en) * | 2013-06-11 | 2013-11-27 | 溧阳市科华机械制造有限公司 | Tool capable of entering into casting water-cooling channel to remove scrap iron |
| CN104043814A (en) * | 2014-06-24 | 2014-09-17 | 南通华东液压铸业有限公司 | Automatic cleaning batch seam sand burning technology for casting part main runner |
| CN204456339U (en) * | 2015-02-12 | 2015-07-08 | 王淑莹 | Unbloking device for sewer |
| CN107052921A (en) * | 2017-06-21 | 2017-08-18 | 郭平 | A kind of bent hole milling tools |
| CN108015265A (en) * | 2017-11-02 | 2018-05-11 | 中国航发哈尔滨东安发动机有限公司 | Complicated cavity and oil circuit casting inner wall cleaning method |
| CN110076698A (en) * | 2019-05-16 | 2019-08-02 | 苏州同谊联擎动力科技有限公司 | The pipeline inner wall thinning technique for having oil circuit aluminium alloy castings |
-
2019
- 2019-09-24 CN CN201910904437.0A patent/CN110721944B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU959852A1 (en) * | 1980-12-16 | 1982-09-23 | Предприятие П/Я Р-6930 | Apparatus for cleaning tube inner surface |
| CN102794284A (en) * | 2012-08-10 | 2012-11-28 | 中铁隧道集团有限公司 | Dredge device of annular embedded corrugated pipe duct and dredge method thereof |
| CN202715556U (en) * | 2012-08-16 | 2013-02-06 | 桐乡合德机械有限公司 | Casting thin and long hole cleaning tool |
| CN203304217U (en) * | 2013-06-11 | 2013-11-27 | 溧阳市科华机械制造有限公司 | Tool capable of entering into casting water-cooling channel to remove scrap iron |
| CN104043814A (en) * | 2014-06-24 | 2014-09-17 | 南通华东液压铸业有限公司 | Automatic cleaning batch seam sand burning technology for casting part main runner |
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