CN105855145B - Solvent-free spraying forming process method for engine lining - Google Patents
Solvent-free spraying forming process method for engine lining Download PDFInfo
- Publication number
- CN105855145B CN105855145B CN201610202245.1A CN201610202245A CN105855145B CN 105855145 B CN105855145 B CN 105855145B CN 201610202245 A CN201610202245 A CN 201610202245A CN 105855145 B CN105855145 B CN 105855145B
- Authority
- CN
- China
- Prior art keywords
- lining
- engine
- spraying
- coating
- centrifugal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
-
- 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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
Abstract
The invention relates to a solvent-free spraying forming process method for an engine lining, which comprises the steps of preparation before engine spraying, preheating, lining spraying, lining centrifugal precuring, lining appearance and thickness detection and qualified product protection. The process of the invention adopts a high-speed rotating spray gun to coat the lining on the inner surface of the engine, and the method utilizes the huge centrifugal force generated by high-speed rotation, slurry is atomized through the circumferential spray holes on the surface of the spray head and is uniformly sprayed to the circumferential surface of the engine, and the axial moving speed of the spray gun is controlled by a servo mechanism, thereby realizing the control of the thickness of the sprayed lining. After the lining layer is centrifugally precured and formed, nondestructive detection of the thickness of the lining layer is carried out by adopting a white light spectrum confocal thickness meter. The process method provided by the invention can greatly improve the precision and efficiency of manufacturing the engine lining and improve the consistency of product quality. Meanwhile, the lining layer does not need to be diluted by a solvent in the production process, so that the pollution of the solvent to the environment is avoided, and the production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of manufacturing of solid engine liners, and particularly relates to a liner forming method.
Background
The lining is one of structural components in the combustion chamber of the solid rocket engine, is located between the heat insulation layer and the propellant grain, has the thickness of 0.3 mm-1.0 mm, and mainly plays a role in bonding the heat insulation layer and the propellant. The lining layer is a polyurethane polymer material, is a high-viscosity adhesive before curing, has poor fluidity and becomes an elastomer material after curing. The lining forming process includes the steps of preparing slurry, coating on the surface of the heat insulating layer, pre-curing before charging, curing the charged powder with propellant, etc.
The coating processes for the backing layer are currently commonly used, including centrifugal, hand knife coating, high pressure solvent spray coating, and mechanical knife coating. The manual knife coating method has the quality problem that the local thickness of the lining is out of control, the bonding quality of the heat insulation layer and the propellant is adversely affected, the production efficiency is low, and operators directly contact the lining slurry, so that great occupational disease hazards exist. High-pressure solvent spraying is adopted, and a large amount of solvent is used, so that the environment is polluted, and the production cost is increased.
Disclosure of Invention
In order to solve the existing problems, the invention discloses a solvent-free spray forming process method for an engine lining, which comprises the following steps:
(1) preparation before engine spraying: checking the appearance condition of the inner surface and the outer surface of the shell of the engine and the bonding quality of the heat insulating layer, and adding a spraying centrifugal tool at the head and the tail part after the normal condition is confirmed;
(2) preheating: placing an engine shell on a centrifugal trolley and pushing the engine shell into an oven to preheat for 30 minutes at the required temperature of 50-60 ℃;
(3) coating a lining layer: the prepared lining is arranged in a material storage cylinder of a coating machine for degassing, a spray rod extends into a shell, the shell rotates, a high-speed rotating spray gun sprays the lining from a head part to a tail part according to program setting, and after the spraying is finished, the spray rod exits from an oven;
(4) centrifugal pre-curing of a lining layer: carrying out centrifugal pre-curing on the shell at a set rotating speed according to required temperature and time;
(5) and (3) detecting the appearance and the thickness of the lining layer: and (4) inspecting the appearance of the pre-cured lining, wherein the lining is required to be uniform in color and free of air holes, missing spraying or sagging defects. The thickness detector is extended into the shell, three parts are uniformly taken along the length direction of the tube, and four points uniformly distributed along the circumferential direction are tested at each part to perform nondestructive thickness measurement by adopting a white light spectrum confocal method;
(6) protection of qualified products: and taking the engine out of the centrifugal trolley, dismounting the head and tail protection tool, and mounting the head and tail protection tool.
The lining spraying in the step (3) adopts a high-speed rotating spray gun to carry out solvent-free spraying.
And (5) carrying out nondestructive testing on the lining layer thickness measurement by adopting a white light spectrum confocal method.
The equipment provided by the invention has the following beneficial effects:
1. accessible program control oven temperature, centrifugal rotational speed, spray gun translation rate, spray gun spraying flow, the automatic shaping of accomplishing the engine lining is in the business turn over of oven to the spray lance, has greatly improved the fashioned automation level of lining, and the precision and the efficiency of lining preparation improve product quality's uniformity.
2. The lining layer does not need to be diluted by a solvent in the production process, so that the pollution of the solvent to the environment is avoided, and the production cost is reduced.
3. The white light spectrum confocal method is adopted for nondestructive testing, the problem that the preformed lining layer can not be subjected to nondestructive thickness measurement is solved, and the quality of the lining layer is ensured.
Drawings
FIG. 1 is a flow chart of a solvent-free spray forming process for an engine lining layer according to the present invention.
Detailed description of the invention
The present invention will be further illustrated with reference to the following specific embodiments.
(1) Preparation before engine spraying: checking the appearance condition of the inner surface and the outer surface of the shell of the engine and the bonding quality of the heat insulating layer, and adding a spraying centrifugal tool at the head and the tail part after the normal condition is confirmed;
(2) preheating: the shell of the engine is placed on a centrifugal trolley and pushed into an oven to be preheated according to the required temperature;
(3) coating a lining layer: and (3) loading the prepared butylated hydroxyamine B703-4 lining layer into a storage barrel of a coating machine, degassing, butting the coating machine with a centrifugal trolley, enabling a spray rod to extend into the shell, rotating the shell, enabling a spray gun to rotate, delaying for 2 seconds, enabling a coating pump to supply coating, delaying for 3-5 seconds (the coating is fully atomized), enabling the coating trolley to retreat, and finishing the inner surface coating of the engine in the retreating process. When the spray gun extends out of the tail part of the engine by 100mm, the spray rod stops, the spraying pump stops supplying the coating, the pneumatic motor stops working after 2 seconds of delay, and the spray rod exits from the oven after the spraying is finished;
(4) centrifugal pre-curing of a lining layer: the shell is pre-cured at a set rotating speed and at a temperature of 70-80 ℃ for 2-3 hours in a centrifugal mode;
(5) and (3) detecting the appearance and the thickness of the lining layer: and (4) inspecting the appearance of the pre-cured lining, wherein the lining is required to be uniform in color and free of air holes, missing spraying or sagging defects. The thickness detector is extended into the shell, three parts are uniformly taken along the length direction of the tube, and four points uniformly distributed along the circumferential direction are tested at each part to perform nondestructive thickness measurement by adopting a white light spectrum confocal method;
(6) protection of qualified products: and taking the engine out of the centrifugal trolley, dismounting the head and tail protection tool, and mounting the head and tail protection tool.
According to the process, the lining spraying is that a high-speed pneumatic motor is used for driving a spray head to rotate at a high speed, and under the action of huge centrifugal force, a high-viscosity (5-15 Pa.s) lining is atomized through spray holes in the spray head and is shot to the inner surface of an engine at a high speed, so that the precision and the efficiency of lining coating are greatly improved; the lining layer does not need to be diluted by adding a solvent during spraying, so that the production cost is reduced, and the pollution of the solvent to the environment is avoided.
The process of the invention adopts white light spectrum confocal thickness measurement to perform nondestructive detection on the thickness of the preformed lining, the spectrum confocal measurement principle converts displacement information into wavelength information, and the measured displacement is obtained through spectrum measurement, thus having stronger adaptability to the measured surface and insensitivity to the characteristics of the measured surface such as inclination, roughness, processing texture, color and the like, and the measurement precision reaches submicron level.
The present invention has been described above by way of example, but the present invention is not limited to the above specific embodiments, and includes a technical solution made up of any combination of the above technical features.
Claims (1)
1. A solvent-free spraying forming process method for an engine lining is characterized by comprising the following steps:
(1) preparation before engine spraying: checking the appearance condition of the inner surface and the outer surface of the shell of the engine and the bonding quality of the heat insulating layer, and adding a spraying centrifugal tool at the head and the tail part after the normal condition is confirmed;
(2) preheating: the shell of the engine is placed on a centrifugal trolley and pushed into an oven to be preheated according to the required temperature; preheating is carried out for 30 minutes at the required temperature of 50-60 ℃;
(3) coating a lining layer: the prepared lining is arranged in a material storage cylinder of a coating machine for degassing, a spray rod extends into a shell, the shell rotates, a spray gun sprays the lining from a head part to a tail part according to program setting, and after the spraying is finished, the spray rod exits from an oven;
the coating lining is specifically characterized in that a prepared Butylated Hydroxytoluene (BHB) 703-4 lining is loaded into a storage barrel of a coating machine for degassing, the coating machine is butted with a centrifugal trolley, a spray rod extends into a shell, the shell rotates, a spray gun rotates for 2 seconds, a coating pump starts to supply coating, the time delay is 3-5 seconds, the coating is fully atomized, the coating trolley starts to retreat, and the inner surface coating of an engine is completed in the retreating process;
when the spray gun extends out of the tail part of the engine by 100mm, the spray rod stops, the spraying pump stops supplying the coating, the pneumatic motor stops working after 2 seconds of delay, and the spray rod exits from the oven after the spraying is finished; wherein the viscosity of the lining layer is 5 Pa.s-15 Pa.s;
the lining layer spraying adopts a high-speed rotating spray gun to carry out solvent-free spraying;
(4) centrifugal pre-curing of a lining layer: carrying out centrifugal pre-curing on the shell at a set rotating speed according to required temperature and time;
the centrifugal pre-curing is performed at the temperature of 70-80 ℃ for 2-3 hours in a centrifugal mode;
(5) and (3) detecting the appearance and the thickness of the lining layer: inspecting the appearance of the pre-cured lining layer, wherein the lining layer is required to be uniform in color and free of air holes, missing spraying or sagging defects; the thickness detector is extended into the shell, three parts are uniformly taken along the length direction of the pipe, and each part is used for testing four points uniformly distributed along the circumferential direction for nondestructive testing;
the thickness measurement of the lining layer is carried out nondestructive testing by adopting a white light spectrum confocal method;
(6) protection of qualified products: and taking the engine out of the centrifugal trolley, dismounting the head and tail protection tool, and mounting the head and tail protection tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202245.1A CN105855145B (en) | 2016-04-01 | 2016-04-01 | Solvent-free spraying forming process method for engine lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202245.1A CN105855145B (en) | 2016-04-01 | 2016-04-01 | Solvent-free spraying forming process method for engine lining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105855145A CN105855145A (en) | 2016-08-17 |
| CN105855145B true CN105855145B (en) | 2020-12-22 |
Family
ID=56626688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610202245.1A Active CN105855145B (en) | 2016-04-01 | 2016-04-01 | Solvent-free spraying forming process method for engine lining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105855145B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107537749A (en) * | 2016-10-13 | 2018-01-05 | 湖北航天化学技术研究所 | Rocket engine solid propellant coats the automatic knife coating procedure of lining |
| CN106493051A (en) * | 2016-11-30 | 2017-03-15 | 成都叮当自动化设备有限公司 | A kind of engine lining spraying method |
| CN106694341A (en) * | 2016-11-30 | 2017-05-24 | 成都叮当自动化设备有限公司 | Method for repairing damage surface of engine lining |
| CN108194228B (en) * | 2017-12-29 | 2019-11-15 | 湖北航天化学技术研究所 | Solid propellant rocket lining is without precuring forming method |
| CN108644029A (en) * | 2018-05-11 | 2018-10-12 | 江西航天经纬化工有限公司 | A kind of small-bore solid rocket motor liner centrifugal device |
| CN113117926B (en) * | 2021-04-16 | 2022-04-22 | 河南中孚高精铝材有限公司 | Control method for oiling aluminum alloy tank strip material at initial starting stage of high-speed trimming line |
| CN114184129B (en) * | 2021-10-25 | 2023-11-10 | 上海航天化工应用研究所 | Two-end engine lining thickness measuring device with closing-in |
| CN115216216B (en) * | 2022-07-22 | 2023-09-08 | 湖北三江航天江河化工科技有限公司 | Integrated material for spraying heat insulation/lining on solid engine grain and forming method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4736684A (en) * | 1984-02-10 | 1988-04-12 | Thiokol Corporation | Delayed quick cure rocket motor liner |
| CN104596428A (en) * | 2013-10-31 | 2015-05-06 | 北京信息科技大学 | White light probe based on spectral confocal and trigonometry principles |
-
2016
- 2016-04-01 CN CN201610202245.1A patent/CN105855145B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4736684A (en) * | 1984-02-10 | 1988-04-12 | Thiokol Corporation | Delayed quick cure rocket motor liner |
| CN104596428A (en) * | 2013-10-31 | 2015-05-06 | 北京信息科技大学 | White light probe based on spectral confocal and trigonometry principles |
Non-Patent Citations (3)
| Title |
|---|
| 唐汉祥等.固体火箭发动机衬层涂覆工艺特性.《推进技术》.2004,第25卷(第6期),第573-576页. * |
| 诸毓武等.固体火箭发动机衬层粘接技术综述.《上海航天》.2012,第29卷(第2期),第31-35,54页. * |
| 陈挺等.光谱共焦技术在精密几何量计量测试中的应用.《计测技术》.2015,第35卷(第S1期),第4-6页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105855145A (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105855145B (en) | Solvent-free spraying forming process method for engine lining | |
| CN109049763B (en) | Manufacturing method of high-temperature-resistant fiber winding composite material shell | |
| EP2769775B1 (en) | Method for producing electrical steel surface super-thick insulating coating | |
| CN103936390B (en) | The preparation method of phosphate composite material antenna house cover body | |
| CN102814888A (en) | Metal composite delivery pipe with polyurethane elastomer lining and manufacturing method and application of metal composite delivery pipe | |
| CN104875316B (en) | Sealing gasket forming method between cone barrel heat shield window and lid | |
| CN109989852B (en) | Charging combustion chamber shell and forming method thereof | |
| CN113106375A (en) | Equipment and process method for repairing pipeline inner wall corrosion based on supersonic laser deposition technology | |
| CN103613861A (en) | Coating rubber roller for high-grade automobile plate production line and manufacturing method thereof | |
| CN107805809A (en) | A kind of automobile die surface coating renovation technique | |
| CN112277209B (en) | Forming method for repairing process of fiber-wound engine shell body model | |
| US7368025B2 (en) | Method for making a thermally protective coating for a propulsive unit structure | |
| CN106391370A (en) | Device and method for machining coating layer on surface of conical inner cavity | |
| CN109605776B (en) | Method for forming fiber winding solidified rocket motor multiphase heat insulating layer | |
| CN108607796A (en) | A kind of preparation method of Electrolyzed Processing cathode insulation coating | |
| CN109926296A (en) | For processing HV cable accessories die mandrel spraying process | |
| CN110091459A (en) | A kind of epoxy resin casting workpiece process for making and using epoxy resin casting workpiece made of this method | |
| JP5616947B2 (en) | Manufacturing method of aluminum alloy forged products | |
| CN107828360A (en) | A kind of normal temperature cure solid rocket motor nozzle structural adhesive | |
| CN106391432B (en) | A kind of production method of wear-resisting machine barrel | |
| CN206315962U (en) | A kind of conical internal cavity face coat processing unit (plant) | |
| CN115216216B (en) | Integrated material for spraying heat insulation/lining on solid engine grain and forming method | |
| CN102615025A (en) | Method for preparing uniform film coating on small-size sample piece | |
| CN113898824B (en) | Nodular cast iron pipe ceramic lining coating equipment and forming process | |
| CN112676052B (en) | Coating throwing and coating device applied to high-viscosity coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |