CN114801245A - Preparation process of composite material spiral spring - Google Patents
Preparation process of composite material spiral spring Download PDFInfo
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- CN114801245A CN114801245A CN202210519464.8A CN202210519464A CN114801245A CN 114801245 A CN114801245 A CN 114801245A CN 202210519464 A CN202210519464 A CN 202210519464A CN 114801245 A CN114801245 A CN 114801245A
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- die
- composite material
- preparing
- mold
- spiral spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/774—Springs
- B29L2031/7742—Springs helical springs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention relates to the field of spiral spring preparation, in particular to a preparation process of a composite material spiral spring, which comprises a weaving system, a feeding system and a control system; wherein the weaving system is used for weaving the fiber bundles; the feeding system is used for preparing a composite material spiral spring prefabricated body and winding the composite material spiral spring prefabricated body on the inner die of the die; the control system is used for controlling the feeding running speed, the rotating speed of the inner die of the die, the inflation and deflation of the inner die, the assembly and disassembly of the die, the cleaning of the die and the spraying of a release agent, and the heating and curing temperature and time of the outer die. The invention can be used for preparing the composite material spiral spring with fixed rigidity and variable rigidity in batches, and has the characteristics of environmental protection, high automation degree, high working efficiency, convenient storage, strong expansibility and the like.
Description
Technical Field
The invention relates to the field of spiral spring preparation, in particular to a preparation process of a composite material spiral spring.
Background
In the prior art, most of the preparation processes of the composite material coil spring are that materials such as fibers and the like are firstly impregnated with resin and then twisted into fiber bundles, then the fiber bundles are wound on a spring curing forming die to be heated and cured, and finally the die is removed to prepare the composite material coil spring.
However, in the process of preparing the composite material helical spring, the demolding process of the composite material helical spring preform after curing is difficult.
Especially, permanent damage may be caused to the inner mold in the demolding process, so that the mold is difficult to ensure the processing precision, and the material utilization rate is low.
Therefore, the inventors further studied this and developed a process for manufacturing a composite material coil spring, which resulted therefrom.
Disclosure of Invention
The invention aims to provide a preparation process of a composite material spiral spring, which has the characteristics of environmental protection, high working efficiency, high automation degree, no influence on the performance of the prepared composite material spiral spring and the like.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a preparation process of a composite material spiral spring comprises the following steps:
(1) weaving the fibers into fiber bundles;
(2) winding the woven fiber bundle with a film impregnated with resin to form a preformed body;
(3) compacting the pre-form prepared in the step (2) to form a compacted pre-form;
(4) winding the compacted preformed body prepared in the step (3) on an inflated inner die;
(5) the inner mold and the outer mold are closed and then cured and formed;
(6) opening the external mold, discharging gas of the internal mold and then demolding;
(7) and inflating and cleaning the inner die to prepare for circularly preparing the composite material spiral spring.
Further, in the step (1), the fiber bundle is knitted by a radial knitting machine or a three-dimensional knitting machine.
Further, in the step (2), toughened epoxy resin or polyurethane resin is adopted as the resin.
Further, in the step (3), the preform is compacted by guiding the fiber bundle impregnated with the resin into a variable cross-section guide tube to achieve circumferential compaction and remove excess resin on the surface of the fiber bundle.
Further, in the step (4), the winding process is that the preformed body is drawn to be wound on the inner die of the die by the rotary tractor, and the inner die of the die is inflated by the inflation and deflation pump on the rotatable multi-station die to achieve the winding rigidity.
Further, in the step (4), the mold is designed according to the structural size of the composite material spiral spring, and the mold inner mold is made of ethylene propylene rubber.
Further, in the step (5), the outer die is provided with 4 positioning holes and 4 threaded holes, the inner die and the outer die are matched with the positioning pins and the bolts and the nuts to realize die assembly of the inner die and the outer die, and the outer die is a heatable outer die.
Further, in the step (6), the demoulding process is that the mechanical arm clamps the formed spring, and the mechanical arm takes away the naturally demoulded composite material spring after the mould is deflated.
After adopting the scheme, compared with the prior art, the invention has the following advantages:
1. the method is favorable for fully impregnating the fiber bundle with resin, compressing the fiber bundle and removing redundant resin on the fiber bundle, effectively avoids the pollution of the inner die of the die by the excessive resin, ensures the forming precision of the composite material helical spring, ensures that the inner die of the die is easy to clean, and saves the cost.
2. The preparation process is environment-friendly, high in automation degree and wide in application range, is suitable for the composite material helical springs with fixed stiffness and variable stiffness characteristics, solves the problems of difficult demoulding and low material utilization rate of the composite material helical springs, and realizes repeated cyclic utilization of the die so as to achieve the purpose of batch preparation of the composite material helical springs.
Drawings
FIG. 1 is a schematic flow diagram of a preparation process of the present invention;
FIG. 2 is a schematic view of the infiltration apparatus;
FIG. 3 is a winding schematic of the rotary winding apparatus;
FIG. 4 is a schematic view of the drive and steering system of the rotary steering device;
FIG. 5 is a schematic view of a rotatable multi-station die configuration;
FIG. 6 is a schematic view of the structure of the air pump of the multi-station rotary table;
FIG. 7 is a schematic view of the structure of a wound composite spring preform;
FIG. 8 is a schematic view of the structure of the clamping device on the mounting system;
fig. 9 is a schematic diagram of the clamping of the inner mold and the outer mold of the assembly system.
Description of the reference symbols
1-radial braiding machine;
2-infiltration device, 21-liquid level observation hole, 22-through hole, 23-liquid injection hole;
3-rotating winding device, 31-turbine, 32-reel cover, 33-film reel, 34-worm;
4-a rotary guide device, 41-a variable cross-section guide sleeve, 42-a double-gear shaft, 43-a transmission gear and 44-a servo motor;
5-a rotary traction device;
6-a rotatable multi-station die, 61-an inner die, 62-a spring, 63-a multi-station rotating table, 64-an air pump, 641-a blade, 642-an air inlet hole, 643-an air outlet hole, 644-a motor and 65-a rotating shaft;
7-assembly system, 71-stud, 72-external mould, 73-positioning pin, 74-nut, 75-clamping device; 8-control device.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
As shown in the figure, the preparation process of the composite material spiral spring comprises the following steps:
(1) basalt fibers and aramid fibers are woven into fiber bundles by a radial weaving machine 1 according to a preset weaving scheme.
(2) The fiber bundle is passed through a wetting device 2, and the fiber bundle impregnated with the resin is wound into a film by a rotary winding device 3.
The top of the infiltration device 2 is provided with a liquid level observation hole 21 for observing the liquid level of the resin, the bottom of the side thereof is provided with a liquid injection hole 23 for supplementing the resin, the two sides thereof are provided with through holes 22 for ensuring the fiber bundles to pass through, and the through holes are 1.1 times of the diameter of the fiber bundles.
The winding device 3 is provided with a worm 34 transmission system of a worm wheel 31, the worm wheel 31 is provided with a shaft core, a film reel 33 can be sleeved in the worm 34 transmission system, and a reel cover 32 is buckled on the film reel for limiting so as to prevent the film reel from falling off. The winding film is wound on the fiber bundle at 45 degrees, and the wound composite material preform should have 45-degree oblique lines.
(3) The fiber bundle impregnated with the resin and wound with the film is fed to the rotary guide 4.
The rotary guide device 4 is provided with a guide sleeve 44 with a variable cross section, the cross section of the guide sleeve is 1.1 times of the diameter of the fiber bundle at the inlet, the cross sections of the rear end and the outlet are set to be the diameter of a spring required by processing, the front end and the rear end are in smooth transition, the inclination angle is 1 degree, and the guide sleeve is made of silicon rubber. The gear 43 and the motor 44 are matched with the double gear shaft 42 to realize the circumferential rotation of the variable cross-section guide sleeve 44 in a gear transmission mode, the fiber bundle is pressed by the front end of the variable cross-section guide sleeve, and the circumferential rotation of the variable cross-section guide sleeve generates circumferential force to compact the fiber bundle, and the redundant resin attached to the surface of the fiber bundle can be removed.
(4) The compacted fiber bundle is tensioned by a rotary traction machine 5 to form a composite material spring preform, and then is wound on an inflated mold inner mold 61.
The air is pumped by the air pump 64 on the multi-station rotary table 63, in which the motor 644 in the air pump 64 controls the vane pump 641 to rotate, so as to suck the air from the air inlet 642 and enter the inner die 61 through the air outlet 643.
(5) After the preform is wound, the rotating shaft 65 of the multi-station rotating table 63 is rotated by 90 degrees and then is conveyed to the position of the inner mold 61 with the preform.
(6) The outer die 72 and the inner die 61 are matched through the clamping device 75, the stud 71 is inserted, the nut 74 is tightened, the positioning pin 73 is inserted, and then the next station is switched to be heated and cured, so that the composite material helical spring prefabricated body is cured and molded; the specific value of the heating curing is matched with the curing characteristic of the selected resin, so that the mechanical property of the value is optimal.
(7) After curing and molding for a predetermined time, the stud 71 and the nut 74 are removed by the chuck 75, the positioning pin 73 is removed, and the outer mold 72 is removed.
(8) And (3) rotating the inner die 51 of the removed outer die to the next station, clamping the spring body of the spring 62 by the clamping device 75, deflating the inner die 61, and demoulding the spring 62.
The clamping device 75 is provided with an anti-slip gasket at the holding part to prevent the spring 62 from falling and being damaged, the demolding is to demold the spring 62 by gravity after the inner mold 61 is deflated and after the inner mold 61 is separated from the spring body, the blades 641 are controlled to rotate reversely by the motor 644 in the air pump 64 in the deflation process, and the air in the inner mold 61 is exhausted from the air outlet 643 in cooperation with the natural flow of the air from high pressure to low pressure.
(9) Cleaning the inner mold 61, and spraying a release agent on the inner mold 61 for recycling.
(10) And (4) transferring the inner mold 61 sprayed with the release agent to an initial station, and circulating the steps. The control systems are also controlled by a control system 8.
The spring body of the composite material spiral spring prepared by the preparation method is made of fiber reinforced resin matrix composite, the inner mold is made of ethylene propylene rubber, and the composite material spiral spring has high temperature resistance and does not influence the physical properties of the composite material spiral spring after curing, inflation and deflation. The radial woven fiber bundle is beneficial to resin impregnation, the variable-section guide sleeve is beneficial to compressing the fiber bundle and removing redundant resin on the surface of the fiber bundle, the pollution of the excessive resin on the mold inner mold is effectively avoided, the forming precision of the composite material spiral spring is ensured, the mold inner mold is easy to clean, and the cost is saved.
The preparation method provides the preparation and demolding method of the composite material helical spring through the inflation and deflation matching manipulator of the inner die, the process is green and environment-friendly, the original characteristics of the fiber bundle are not influenced, the automation degree is high, the expansibility is high, the composite material helical spring with fixed stiffness and variable stiffness characteristics is simultaneously adapted, the problems that the composite material helical spring is difficult to demold and the material utilization rate is low are solved, and the repeated cyclic utilization of the die is realized to achieve the batch preparation of the composite material helical spring.
The above description is only an embodiment of the present invention, and all the terms such as "upper", "lower", "left", "right", "middle", etc. in the present invention are used as reference and not absolutely limited, and all the insubstantial modifications made by the present invention shall fall within the scope of infringing the present invention.
Claims (8)
1. A preparation process of a composite material spiral spring is characterized by comprising the following steps:
(1) weaving the fibers into fiber bundles;
(2) winding the woven fiber bundle with a film impregnated with resin to form a preformed body;
(3) compacting the pre-form prepared in the step (2) to form a compacted pre-form;
(4) winding the compacted preformed body prepared in the step (3) on an inflated inner die;
(5) the inner mold and the outer mold are closed and then cured and formed;
(6) opening the external mold, discharging gas of the internal mold and then demolding;
(7) and inflating and cleaning the inner die to prepare for circularly preparing the composite material spiral spring.
2. The process for preparing a composite material coil spring according to claim 1, wherein: in the step (1), the fiber bundles are knitted by a radial knitting machine or a three-dimensional knitting machine.
3. The process for preparing a composite material coil spring according to claim 1, wherein: in the step (2), the resin is toughened epoxy resin or polyurethane resin.
4. The process for preparing a composite material coil spring according to claim 1, wherein: and (3) in the step (3), the concrete method for compacting the preform is to guide the fiber bundle soaked with the resin into the variable cross-section guide pipe so as to realize circumferential compaction and remove redundant resin on the surface of the fiber bundle.
5. The process for preparing a composite material coil spring according to claim 1, wherein: in the step (4), the winding process is that the preformed body is drawn to be wound on the inner die of the die by the rotary tractor, and the inner die of the die is inflated by an inflation and deflation pump on the rotatable multi-station die to achieve the winding rigidity.
6. The process for preparing a composite material coil spring according to claim 1, wherein: in the step (4), the mold is designed according to the structural size of the composite material spiral spring, and the mold inner mold is made of ethylene propylene rubber.
7. The process for preparing a composite material coil spring according to claim 1, wherein: in the step (5), the outer die is provided with 4 positioning holes and 4 threaded holes, the inner die and the outer die are matched with the positioning pins and the bolts and the nuts to realize die assembly of the inner die and the outer die, and the outer die is a heatable outer die.
8. The process for preparing a composite material coil spring according to claim 1, wherein: in the step (6), the demoulding process is that the mechanical arm clamps the formed spring, and the mechanical arm takes away the naturally demoulded composite material spring after the mould is deflated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519464.8A CN114801245A (en) | 2022-05-13 | 2022-05-13 | Preparation process of composite material spiral spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210519464.8A CN114801245A (en) | 2022-05-13 | 2022-05-13 | Preparation process of composite material spiral spring |
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| Publication Number | Publication Date |
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| CN114801245A true CN114801245A (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210519464.8A Pending CN114801245A (en) | 2022-05-13 | 2022-05-13 | Preparation process of composite material spiral spring |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1547992A1 (en) * | 2003-12-18 | 2005-06-29 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Process for producing a fibre reinforced composite material and the fibre reinforced composite material |
| CN105773997A (en) * | 2016-04-25 | 2016-07-20 | 大连理工大学 | Core mold device used for forming all-composite shell |
| US20160325516A1 (en) * | 2014-01-09 | 2016-11-10 | Bridgestone Americas Tire Operations, Llc | Tire mold vent |
| CN106313584A (en) * | 2016-09-07 | 2017-01-11 | 山东大学 | Forming device and forming method for tubular three-dimensional braided composite product |
| CN108591322A (en) * | 2018-05-23 | 2018-09-28 | 中国第汽车股份有限公司 | A kind of automotive composite material helical spring and preparation method thereof |
| CN208305844U (en) * | 2018-04-26 | 2019-01-01 | 刘念 | The curing system of D braided composites cored screw spring |
| CN113320125A (en) * | 2020-02-28 | 2021-08-31 | 南京诺尔泰复合材料设备制造有限公司 | Manufacturing method and production line of continuous fiber composite material spring and spring |
-
2022
- 2022-05-13 CN CN202210519464.8A patent/CN114801245A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1547992A1 (en) * | 2003-12-18 | 2005-06-29 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Process for producing a fibre reinforced composite material and the fibre reinforced composite material |
| US20160325516A1 (en) * | 2014-01-09 | 2016-11-10 | Bridgestone Americas Tire Operations, Llc | Tire mold vent |
| CN105773997A (en) * | 2016-04-25 | 2016-07-20 | 大连理工大学 | Core mold device used for forming all-composite shell |
| CN106313584A (en) * | 2016-09-07 | 2017-01-11 | 山东大学 | Forming device and forming method for tubular three-dimensional braided composite product |
| CN208305844U (en) * | 2018-04-26 | 2019-01-01 | 刘念 | The curing system of D braided composites cored screw spring |
| CN108591322A (en) * | 2018-05-23 | 2018-09-28 | 中国第汽车股份有限公司 | A kind of automotive composite material helical spring and preparation method thereof |
| CN113320125A (en) * | 2020-02-28 | 2021-08-31 | 南京诺尔泰复合材料设备制造有限公司 | Manufacturing method and production line of continuous fiber composite material spring and spring |
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