CN112297463B - Carbon fiber composite piston molding process - Google Patents
Carbon fiber composite piston molding process Download PDFInfo
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- CN112297463B CN112297463B CN202010934175.5A CN202010934175A CN112297463B CN 112297463 B CN112297463 B CN 112297463B CN 202010934175 A CN202010934175 A CN 202010934175A CN 112297463 B CN112297463 B CN 112297463B
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- paving
- die
- material sheet
- paved
- cylindrical
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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
-
- 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
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7494—Pistons
Abstract
The invention discloses a carbon fiber composite piston molding process, which comprises the following steps: 1) blanking a prepreg; 2) preparing a paving and pasting mold; 3) paving and sticking prepreg: 3-1) paving the surface of the single-petal sub-mold by using the material sheet to obtain a plurality of single-petal splicing molds; 3-2) paving a cylindrical material column by using a material sheet; 3-3) splicing the single-piece splicing dies into a closed structure to form a circular ring structure integrally, and then inserting the cylindrical material column into the through hole in the center to obtain a cylindrical material tray; 3-4) using the material sheet to spread and stick the top surface of the cylindrical material tray and extend and stick to the periphery of the material tray; 3-5) paving the top surface of the paving layer obtained in the step 3-4) by using a material sheet, and extending and paving the paving layer to the periphery of the upper die; 3-6) paving material sheets on the L-shaped structural surface formed between the layers 3-5) and the layers 3-4), and extending and paving the material sheets to the periphery of the material tray; 4) curing; 5) and the piston prepared by the invention greatly lightens the weight and can greatly reduce the energy consumption in underwater operation.
Description
Technical Field
The invention relates to a piston, in particular to a piston manufacturing process.
Background
The piston is used as a common part in various power devices, and the piston which is most commonly used in the market at present is made of metal materials, including cast iron, steel, aluminum alloy and the like. Except for well-known starting devices, pistons are also commonly used in devices such as propelling devices, launching devices and the like, and many underwater detection devices, fishing devices and the like adopt piston launching devices.
At present, pistons adopted by a pushing device of an underwater fishing and detecting device are all made of aluminum alloy materials, and the pistons are difficult to rust and light in weight compared with the pistons made of steel, cast iron and other materials. However, in the underwater pushing process, the resistance of seawater is difficult to reduce the weight of the metal piston by using the deep sea environment, and the relative energy consumption is larger.
Disclosure of Invention
The invention aims to provide a carbon fiber composite piston forming process, the weight of the manufactured piston is greatly reduced, and the energy consumption can be greatly reduced in underwater operation.
The purpose of the invention is realized as follows: a carbon fiber composite piston molding process comprises the following steps:
1) blanking prepreg, preparing material sheets with different shapes and sizes to be paved according to different areas;
2) preparing a paving die, preparing a die to be paved and pasted, and cleaning the surface of the die, wherein the die comprises a rack arranged on a base, a circular die groove is formed in the center of the base, a cylindrical lower die is arranged in the die groove, the lower die is formed by assembling sub dies with the same multi-piece structure, a through hole is formed in the center of the lower die, a cylindrical upper die is arranged on the rack, the upper die and the lower die are coaxially arranged, a gap exists between the upper die and the lower die, wedge blocks are attached to two sides of the sub die, the attachment surfaces of the wedge blocks and the sub dies are inclined planes, the outer surfaces of the wedge blocks extend outwards to form bosses, and the bosses of two adjacent wedge blocks are attached together;
3) laying and pasting prepreg:
3-1) paving the surface of the single-petal sub-mold with the wedge blocks by using a material sheet to obtain a plurality of single-petal splicing molds;
3-2) paving a cylindrical material column used for being inserted into the central through hole of the lower die by using a material sheet;
3-3) placing a plurality of single-piece splicing molds into a circular mold groove in the center of the base, so that bosses of two adjacent single-piece splicing molds are jointed to form a closed structure, and a circular ring structure is formed integrally;
3-4) using the material sheet to spread and stick the top surface of the cylindrical material tray and extend and stick the material sheet to the periphery of the material tray;
3-5) paving the top surface of the paving layer obtained in the step 3-4) by using a material sheet, and extending and paving the paving layer to the periphery of the upper die;
3-6) paving material sheets on the L-shaped structural surface formed between the layers 3-5) and the layers 3-4), and extending and paving the material sheets to the periphery of the material tray;
4) curing, namely curing in an autoclave after paving;
5) and (5) demolding, and after solidification, separating the mold from the product to obtain the all-composite material piston.
As a further limitation of the invention, in the step 3-1), when the surface of the single-petal sub-mold is paved, the surface of the boss is not paved, and the size of the paved material sheet is ensured through the step of blanking the prepreg.
As a further limitation of the invention, after the demoulding in the step 5) is finished, a machining step is required, a blind hole is formed in the center of the cylindrical material column, and meanwhile, an annular groove is formed in the area paved in the step 3-6) along the axial direction of the piston.
Compared with the prior art, the invention has the beneficial effects that: the piston made of the full composite material can be prepared by adopting the process, and can be used for a long time within the temperature range of-55 ℃ to 100 ℃, and the dimensional stability in the temperature environment is obviously superior to that of various metals; the specific gravity of the prepared full composite material is only 60% of that of the aluminum alloy, and the energy consumption can be obviously reduced by operating under the same working condition.
Drawings
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a cross-sectional view of a prepreg application step in accordance with the present invention.
FIG. 3 is a graph of autoclave curing in accordance with the present invention.
Fig. 4 is a schematic perspective view of a piston manufactured according to the present invention.
Fig. 5 is a perspective view of a mold used in the present invention.
FIG. 6 is a schematic diagram of a sub-mold structure according to the present invention.
FIG. 7 is a schematic view of the wedge block structure of the present invention.
The die comprises a base 1, a frame 2, a lower die 3, a sub-die 31, a wedge-shaped block 32, a boss 321 and an upper die 4.
Detailed Description
The carbon fiber composite material piston molding process shown in figure 1 comprises the following steps.
1) And blanking the prepreg, drawing the appearance of each layer of fiber prepreg by using drawing software according to different areas, and introducing the appearance into an operating system of an automatic blanking machine, cutting each sheet by the automatic blanking machine according to a program, and marking each sheet.
2) Preparing a paving mold, preparing the mold to be paved, as shown in fig. 5-7, cleaning up sundries such as residual resin and the like on the mold pasting surface of the mold by using wiping paper or a clean rag before the mold is used, and cleaning up the working surface of the mold by dipping the wiping paper in acetone; coating 770NC release agent on the surface of the die for 5 times, wherein no coating omission position exists, and the interval time between each time is not less than 15 minutes; after the last release agent of coating, put into the oven with the mould, solidification 30min under 120 ℃, the mould is including setting up frame 2 on base 1, circular mould groove is seted up at base 1 center, the mould inslot is provided with cylindrical lower mould 3, lower mould 3 is assembled by 6 lamella (not only confine 6 lamella, also can be even 3-8 lamella) submoulds 31 that the structure is the same and is formed, and the through-hole has been seted up at the center of lower mould 3, install cylindrical last mould 4 on the frame 2, go up mould 4 and the coaxial setting of lower mould 3, and there is the clearance between last mould 4 and the lower mould 3, the both sides laminating of submould 31 has wedge 32, wedge 32 is the inclined plane with the binding face of submould 31, the surface of wedge 32 outwards extends and forms boss 321, the boss 321 laminating of two adjacent wedges 32 is in the same place.
3) Prepreg lay-up, as shown in fig. 2:
3-1) insert block layering: paving the surface of the single-piece sub-mold 31 with the wedge blocks 32 by using the material sheet to obtain a plurality of single-piece splicing molds, pre-drawing for 1 time every four layers, and paving the single-piece splicing molds to be 6mm in thickness;
3-2) middle cylinder laying layer II: paving a cylindrical material column for inserting into a central through hole of the lower die 3 by using a material sheet, pre-pumping for 1 time every eight layers, and paving the material column with the thickness of 90 mm;
3-3) R area layer III: manufacturing carbon extrusion wires by adopting 12 10mm wide and narrow prepregs, and filling an R region;
3-4) an insert combined paving area IV: putting 6 single-piece splicing dies into a circular die groove in the center of the base 1, enabling bosses 321 of two adjacent single-piece splicing dies to be attached to form a closed structure, integrally forming a circular ring-shaped structure, inserting a cylindrical material column into a through hole in the center to obtain a cylindrical material disc, paving the top surface of the cylindrical material disc by using material sheets, extending and paving the cylindrical material disc to the periphery of the material disc, pre-drawing for 1 time every four layers, and actually paving the material disc with the thickness of 3 mm;
3-5) middle thickness compensation area (v): the upper inner ring of the paving area is paved and adhered with the top surface by using the material sheet; pre-pumping every four layers for 1 time, wherein the solid paving thickness is 18 mm;
3-6) working end independent paving zone: in the compensation area (fifthly), the top surface of the material sheet is paved and adhered to the periphery of the upper die 4 in an extending way, each 4 layers are pre-extracted for 1 time, the solid paving thickness is 8mm, and the paved area can be combined with the paved part of the upper die to be paved and adhered after being paved and adhered;
3-7) R region is filled with the following components: filling the R region after the die assembly combination, manufacturing a carbon extrusion wire by adopting 12 pieces of 10mm wide and narrow prepregs, and filling the R region;
3-8) combining the whole layer region (viii): paving adhesive sheets on the L-shaped structural surface between the paving area IV, the compensation area IV and the layering area IV, extending and paving the adhesive sheets to the periphery of the material tray, pre-drawing every four layers for 1 time, and paving the material tray with a solid thickness of 3 mm;
3-9) integral flanging and thickness supplementing region ninthly: paving the material tablets on the L-shaped surface of the layering area (I), pre-pumping every four layers for 1 time, and actually paving the material tablets to a thickness of 7 mm;
3-10) working area thicknessing area R: paving adhesive sheets on the horizontal plane of the thickness supplementing area, pre-pumping every eight layers for 1 time, and paving the adhesive sheets with the thickness of 43 mm;
3-11) hoop wrap area ⑪: and paving adhesive tablets on the peripheries of the red (R) layer area, the thickness supplement area, and the thickness supplement area, wherein each four layers are pre-extracted for 1 time, the theoretical thickness is 6mm, and the actual paving thickness of the area for ensuring the machining allowance is 8 mm.
4) Curing, after finishing paving, manufacturing a vacuum bag, and curing in an autoclave, wherein a curing curve is shown in fig. 3.
5) Demoulding, after the curing process is finished, the product and the mould are placed below 40 ℃ for demoulding; and finally, the mold is installed to smoothly and reversely demold, when the cylindrical material tray is demolded, the sub-mold 31 is taken down firstly, and then the wedge block 32 is taken down, and since the binding surface between the sub-mold and the wedge block is an inclined surface, the demolding is more convenient and smooth.
6) And machining, wherein because the carbon fiber composite piston adopts a vacuum bag autoclave curing and forming process, organic allowance is left on the bag attaching surface, and the overall dimension of a final product is finished by a machining center.
7) After post-processing, the machined piston surface has many powder and burrs, and the surface treatment work is performed by local grinding and wiping, and the final piston is as shown in fig. 4.
The carbon fiber composite piston can be used for a long time at the temperature of between 55 ℃ below zero and 100 ℃, and the dimensional stability in the temperature environment is obviously superior to that of various metals; 2. the specific gravity of the material used by the invention is only 60% of that of the aluminum alloy, and the energy consumption can be obviously reduced by operating under the same working condition.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts based on the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (3)
1. A carbon fiber composite piston molding process is characterized by comprising the following steps:
1) blanking prepreg, preparing tablets with different shapes and sizes to be paved according to different areas;
2) preparing a paving die, preparing a die to be paved and pasted, and cleaning the surface of the die, wherein the die comprises a rack arranged on a base, a circular die groove is formed in the center of the base, a cylindrical lower die is arranged in the die groove, the lower die is formed by assembling sub dies with the same multi-piece structure, a through hole is formed in the center of the lower die, a cylindrical upper die is arranged on the rack, the upper die and the lower die are coaxially arranged, a gap exists between the upper die and the lower die, wedge blocks are attached to two sides of the sub die, the attachment surfaces of the wedge blocks and the sub dies are inclined planes, the outer surfaces of the wedge blocks extend outwards to form bosses, and the bosses of two adjacent wedge blocks are attached together;
3) laying and pasting prepreg:
3-1) paving the surface of the single-petal sub-mold with the wedge blocks by using a material sheet to obtain a plurality of single-petal splicing molds;
3-2) paving a cylindrical material column used for being inserted into the central through hole of the lower die by using a material sheet;
3-3) placing a plurality of single-piece splicing molds into a circular mold groove in the center of the base, so that bosses of two adjacent single-piece splicing molds are jointed to form a closed structure, and a circular ring structure is formed integrally;
3-4) using the material sheet to spread and stick the top surface of the cylindrical material tray and extend and stick to the periphery of the material tray;
3-5) paving the top surface of the paving layer obtained in the step 3-4) by using a material sheet, and extending and paving the paving layer to the periphery of the upper die;
3-6) paving a material sheet on the L-shaped structural surface formed between the layer 3-5) and the layer 3-4), and extending and paving the material sheet to the periphery of the material tray;
4) curing, namely curing in an autoclave after paving;
5) and (5) demolding, and after solidification, separating the mold from the product to obtain the all-composite material piston.
2. The carbon fiber composite piston molding process according to claim 1, wherein in the step 3-1), when the surface of the single-segment mold is paved, the surface of the boss is not paved, and the size of the paved material sheet is ensured through the step of blanking prepreg.
3. The carbon fiber composite piston molding process according to claim 1, wherein after the demolding in step 5), a machining step is further performed, a blind hole is formed in the center of the cylindrical material column, and the area paved in step 3-6) is machined along the axial direction of the piston to form a circumferential groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010934175.5A CN112297463B (en) | 2020-09-08 | 2020-09-08 | Carbon fiber composite piston molding process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010934175.5A CN112297463B (en) | 2020-09-08 | 2020-09-08 | Carbon fiber composite piston molding process |
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| CN112297463A CN112297463A (en) | 2021-02-02 |
| CN112297463B true CN112297463B (en) | 2022-07-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104650511A (en) * | 2014-06-21 | 2015-05-27 | 柳州凯通机械有限公司 | Carbon fiber piston ring |
| CN106957180A (en) * | 2017-03-10 | 2017-07-18 | 湘潭大学 | A kind of Cf/ C SiC ceramic matrix composite materials and its preparation method and application |
| CN110815866A (en) * | 2019-11-15 | 2020-02-21 | 中国科学院长春光学精密机械与物理研究所 | Integrated molding process of composite reflector |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3435043A1 (en) * | 1984-09-24 | 1986-04-03 | C. Conradty Nürnberg GmbH & Co KG, 8505 Röthenbach | POLYGRANULAR CARBON BODY AND METHOD FOR THE PRODUCTION THEREOF |
| NL1026076C2 (en) * | 2004-04-29 | 2005-11-01 | Univ Eindhoven Tech | Molded part manufactured by means of electro-spinning and a method for the manufacture thereof as well as the use of such a molded part. |
| CN109249627B (en) * | 2018-08-17 | 2020-07-10 | 武汉源海博创科技有限公司 | Compression molding process for carbon fiber composite propeller |
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- 2020-09-08 CN CN202010934175.5A patent/CN112297463B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104650511A (en) * | 2014-06-21 | 2015-05-27 | 柳州凯通机械有限公司 | Carbon fiber piston ring |
| CN106957180A (en) * | 2017-03-10 | 2017-07-18 | 湘潭大学 | A kind of Cf/ C SiC ceramic matrix composite materials and its preparation method and application |
| CN110815866A (en) * | 2019-11-15 | 2020-02-21 | 中国科学院长春光学精密机械与物理研究所 | Integrated molding process of composite reflector |
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