CN113021948B - Forming tool and process for continuous fiber reinforced resin matrix composite gear parts - Google Patents
Forming tool and process for continuous fiber reinforced resin matrix composite gear parts Download PDFInfo
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- CN113021948B CN113021948B CN202110385263.9A CN202110385263A CN113021948B CN 113021948 B CN113021948 B CN 113021948B CN 202110385263 A CN202110385263 A CN 202110385263A CN 113021948 B CN113021948 B CN 113021948B
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- tooth
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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
- B29C70/34—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 and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—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 and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
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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
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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
- B29L2031/32—Wheels, pinions, pulleys, castors or rollers, Rims
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a forming tool and a forming process for a continuous fiber reinforced resin matrix composite gear part, and belongs to the technical field of processing tools. A forming tool for a continuous fiber reinforced resin matrix composite tooth part comprises a tooth part forming die and a plurality of tooth pre-pressing tool units; a tooth part die cavity of the tooth part forming die is used for placing continuous fiber prepreg; the tooth-shaped prepressing tool unit is provided with a concave surface corresponding to the tooth shape and used for pressing the continuous fiber prepreg in the tooth-shaped part forming die layer by layer; the tooth-shaped pre-pressing tool unit is made of a strong magnetic material, and a polytetrafluoroethylene layer is wrapped on the periphery of the strong magnetic material. According to the forming tool for the continuous fiber reinforced resin matrix composite gear parts, the tooth-shaped prepressing tool unit has strong magnetism, independence and combinability, and the problem of sticking and bridging of the continuous fiber prepreg in a tooth part cavity can be effectively solved by pressing during laying.
Description
Technical Field
The invention belongs to the technical field of processing tools, and particularly relates to a forming tool and a forming process for a continuous fiber reinforced resin matrix composite tooth part.
Background
The tooth-like structural component is widely used in the industrial field with its excellent structural strength and dimensional accuracy. The traditional tooth type structural parts are all made of metal materials, but the application range of the traditional tooth type structural parts is gradually limited due to the defects of high processing cost, insufficient light weight under special working conditions, poor corrosion resistance and the like.
In recent years, the fiber reinforced resin matrix composite material gradually replaces the traditional metal material with the characteristics of light weight, high strength, high molding size precision, wear resistance, corrosion resistance and the like, and is widely applied to tooth parts. The chopped fiber reinforced material is widely applied to the processing and preparation of the tooth parts of the fiber reinforced resin matrix composite material by the mechanical property characteristic of the chopped fiber reinforced material similar to quasi-isotropy and the easy processability in the processes of injection molding and die pressing. However, in recent years, the problem of weak mechanical properties at the tooth root caused by the discontinuity of the fibers and low interlayer bonding strength in practical application of the chopped fiber reinforced resin matrix composite tooth parts has attracted much attention.
The continuous fiber reinforced resin matrix composite material is widely applied to the preparation and processing of various high-precision parts due to the excellent designability of structural strength. In the application process of tooth class spare part, because of the particularity of tooth's socket structure, easily lead to the continuous fiber of tiling to appear bridging, and then can influence the follow-up solidification forming in-process and appear various defects, for example: wrinkling, resin enrichment, disorientation of the fiber tows, and the like. Therefore, it is necessary to design and process a forming tool for prepressing the continuous fiber prepreg into a tooth-shaped blank, and ensuring that the fiber prepreg is firmly attached to the surface of the die, and the consistency and regularity of the fiber tows are effectively ensured.
Disclosure of Invention
The invention aims to overcome the defects of wrinkling, resin enrichment and disordered fiber tow orientation of tooth parts made of continuous fiber reinforced resin matrix composite materials and provides a forming tool and a forming process of the tooth parts made of the continuous fiber reinforced resin matrix composite materials.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a forming tool for a continuous fiber reinforced resin matrix composite tooth part comprises a tooth part forming die and a plurality of tooth pre-pressing tool units;
a tooth part die cavity of the tooth part forming die is used for placing continuous fiber prepreg;
the tooth-shaped prepressing tool unit is provided with a concave surface corresponding to the tooth shape and used for pressing the continuous fiber prepreg in the tooth-shaped part forming die layer by layer;
the tooth-shaped pre-pressing tool unit is made of a strong magnetic material, and a polytetrafluoroethylene layer is wrapped on the periphery of the strong magnetic material.
Furthermore, the device also comprises a blank integral fixing tool which is adsorbed into a whole by a plurality of tooth-shaped prepressing tool units.
The forming process of the forming tool for the continuous fiber reinforced resin matrix composite gear parts comprises the following steps of:
(1) Horizontally placing the cut continuous fiber prepreg on a tooth part die cavity of a tooth part forming die;
(2) Pressing a tooth-shaped pre-pressing tool unit on the continuous fiber prepreg positioned at the end of the tooth-shaped part forming die until the continuous fiber prepreg is tightly attached to a tooth-shaped die cavity of the tooth-shaped part forming die;
(3) Repeating the step (2), sequentially pressing a plurality of tooth-shaped pre-pressing tool units on the continuous fiber prepreg, wherein the last tooth-shaped pre-pressing tool unit is positioned on the continuous fiber prepreg at the end tail of the tooth-shaped part forming die, and sequentially taking out the tooth-shaped pre-pressing tool units from the end head to the end tail of the tooth-shaped part forming die to finish the laying of the first layer of continuous fiber prepreg;
(4) Repeating the steps (2) to (3) until the number of layers of the continuous fiber prepreg layers reaches the designed number of layers;
(5) And transferring the tooth-shaped part forming die to curing forming equipment for curing forming.
Further, the following operations are also included between the steps (4) and (5):
adsorbing a plurality of tooth-shaped prepressing tool units into a whole to form a blank integral fixing tool; and performing continuous fiber prepreg in the tooth-shaped part forming die by using a blank integral fixing tool to obtain a product blank.
Further, the specific operation of performing the preforming by using the blank integral fixing tool in the step (5) is as follows:
placing a blank integral fixing tool on a continuous fiber prepreg in a tooth-shaped part forming die;
placing a pressing plate on the blank integral fixing tool, and placing the tooth-shaped part forming die on a laminated panel of a hot press;
and under the condition of cold pressing or low-temperature hot pressing, applying preset pressure to a blank integral fixing tool, and performing preforming on the continuous fiber prepreg blank by the blank integral fixing tool until the tooth part die cavity is filled with the continuous fiber prepreg fully.
Further, in the step (5), a plurality of tooth-shaped pre-pressing tool units are overlapped and adsorbed together by means of magnetic force.
Further, the continuous fiber prepreg obtained in the step (1) is cut and blanked according to the axial curved surface length of the tooth part.
Further, the number of the layers of the continuous fiber prepreg layup in the step (1) is determined by the thickness of the tooth part.
Further, a release agent is coated in the forming die of the tooth-shaped part in the step (1).
Further, the smearing mode is as follows:
uniformly coating a release agent on a tooth part die cavity of a tooth part forming die, standing for 15min at room temperature to form a coating;
repeating the above steps for 2-3 times.
Compared with the prior art, the invention has the following beneficial effects:
according to the forming tool for the continuous fiber reinforced resin matrix composite gear parts, the tooth-shaped prepressing tool unit has strong magnetism, independence and combinability, and the problem of sticking and bridging of the continuous fiber prepreg in a tooth part cavity can be effectively solved by pressing during laying.
Furthermore, the integral fixing tool of the blank formed by combining a plurality of groups of tooth-shaped prepressing tool units by magnetic acting force can ensure that the continuous fiber prepreg paved layer by layer has certain prepressing binding force in the vertical and axial directions of the cavity of the metal die, thereby laying a foundation for the solidification and molding of the tooth structure; in addition, due to the independence of the tooth-shaped prepressing tool unit, the blank fixing overall tool can adjust the thickness difference of different positions of the blank along with the shape under a certain external force.
According to the forming process of the continuous fiber reinforced resin matrix composite material tooth part, under the premise that continuous fiber laying of a tooth-shaped structure of the part is guaranteed, the tooth-shaped prepressing tool unit can effectively guarantee that continuous fiber prepreg is firmly attached to a die surface at the bottom and the top of a tooth groove, and the problem that the continuous fiber prepreg, especially unidirectional fiber prepreg is easily bridged at an approximately right-angled folding surface is solved. Through the overall blank fixing tool, the continuous fiber prepreg blank is pre-pressed and formed, and the resin enrichment phenomenon caused by fiber slippage and cavity formation in a fiber bridging area can be effectively eliminated in the hot-pressing curing process. Drawings
FIG. 1 is a schematic view of a continuous fiber reinforced resin matrix composite tooth part;
FIG. 2 is a schematic structural view of a tooth-shaped pre-pressing tooling unit;
fig. 3 is a schematic structural diagram of a blank integral fixing tool.
In the figure: 1-continuous fiber prepreg; 2-a tooth-shaped part forming die; 3-a tooth-shaped pre-pressing tool unit; and 4, integrally fixing the blank.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, fig. 1 is a schematic structural diagram of a forming tool of the present invention, the forming tool of the present invention includes a tooth-shaped part forming die 2 and a plurality of tooth-shaped pre-pressing tool units 3, and a tooth slot of the tooth-shaped part forming die 2 is used for placing a continuous fiber prepreg; referring to fig. 2, fig. 2 is a schematic structural view of a tooth-shaped pre-pressing tool unit, wherein a concave surface corresponding to a tooth shape is arranged on the tooth-shaped pre-pressing tool unit 3 and used for pressing continuous fiber prepregs placed in a tooth-shaped part forming die 2 layer by layer; the tooth-shaped pre-pressing tool unit 3 is made of a strong magnetic material, and a polytetrafluoroethylene layer is coated on the periphery of the strong magnetic material; the tooth-shaped part forming die 2 which is absorbed into a whole by magnetic force forms a blank integral fixing tool 4; during molding, the continuous fiber prepreg 1 is placed on a tooth part mold cavity of the tooth part molding mold 2, and the continuous fiber prepreg 1 is pressed by the tooth pre-pressing tool unit 3 to achieve the purpose of tightly adhering and covering the continuous fiber prepreg 1 and the tooth part mold cavity of the tooth part molding mold 2 layer by layer.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a blank overall fixing tool, and the blank overall fixing tool 4 is integrally adsorbed by overlapping a plurality of tooth-shaped pre-pressing tool units 3.
The forming process of the invention comprises the following specific operations:
before the blank is layered, uniformly coating a release agent on a tooth part cavity of a tooth part forming die 2, standing for 15min at room temperature to form a layer of coating on the die surface, and repeating the working procedures for 2-3 times;
cutting and blanking the continuous fiber prepreg 1 according to the axial curved surface length of the tooth part, wherein the number of layers of a continuous fiber prepreg laying layer is determined according to the thickness of the tooth part; flatly placing the cut continuous fiber prepreg 1 on a tooth part die cavity of a tooth part forming die 2, pressing a tooth-shaped prepressing tool unit 3 on the continuous fiber prepreg 1 from one end of the tooth part forming die 2, pressing and tightly covering the continuous fiber prepreg 1 and the tooth part die cavity of the tooth part forming die 2, and then pressing and covering the continuous fiber prepreg 1 of a rear tooth part in the tooth part die cavity by using another tooth-shaped prepressing tool unit 3; repeating the above actions, and tightly attaching a single-layer complete continuous fiber prepreg into a tooth part cavity of the tooth part forming die 2;
after the first layer of continuous fiber prepreg is laid, taking out the tooth-shaped prepressing tool unit 3 from one end of the mold in sequence, and prepressing the second layer of continuous fiber prepreg from the end tooth groove of the mold; repeating the actions to complete the laying prepressing procedure of the second layer of complete continuous fiber prepreg;
repeating the working procedures, and stopping operation after the number of the laying layers of the continuous fiber prepreg 1 reaches the designed number of the laying layers;
the tooth-shaped prepressing tool units 3 are combined into a blank integral fixing tool 4, and due to the independence of the tooth-shaped prepressing tool units 3, a plane metal pressing plate is placed on the blank integral fixing tool 4, and the tooth-shaped part forming die 2 is integrally transferred to a hot press laminating panel. Under the condition of cold pressing or low-temperature hot pressing, a certain pressure is applied to the blank integral fixing tool 4 to pre-press and form the continuous fiber prepreg blank, so that the continuous fiber prepreg is fully filled in a tooth cavity, the fiber bundle is regularly and orderly oriented, and the size precision of the tooth reaches the design requirement of a product.
After the layering of the blanks is finished, the whole blank fixing tool 4 is disassembled, the tooth part forming die is transferred to curing forming equipment, and curing forming is carried out under the forming process condition, so that the continuous fiber reinforced resin matrix composite tooth parts with the performance characteristics of light weight, high strength, high forming size precision, wear resistance, corrosion resistance and the like can be prepared.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (7)
1. A forming process of a forming tool for a continuous fiber reinforced resin matrix composite tooth part is characterized in that the forming tool for the continuous fiber reinforced resin matrix composite tooth part comprises a tooth part forming die (2) and a plurality of tooth pre-pressing tool units (3);
a tooth part die cavity of the tooth part forming die (2) is used for placing continuous fiber prepreg;
a concave surface corresponding to the tooth shape is arranged on the tooth shape pre-pressing tool unit (3) and is used for pressing the continuous fiber prepreg in the tooth shape part forming die (2) layer by layer;
the tooth-shaped pre-pressing tool unit (3) is made of a strong magnetic material, and a polytetrafluoroethylene layer is wrapped on the periphery of the strong magnetic material;
the molding process comprises the following steps:
(1) Horizontally placing the cut continuous fiber prepreg on a tooth part mold cavity of a tooth part forming mold (2);
(2) Pressing a tooth-shaped pre-pressing tool unit (3) on a continuous fiber prepreg positioned at the end of a tooth-shaped part forming die (2) until the continuous fiber prepreg is tightly adhered to a tooth-shaped die cavity of the tooth-shaped part forming die (2);
(3) Repeating the step (2), sequentially pressing a plurality of tooth-shaped pre-pressing tool units (3) on the continuous fiber prepreg, wherein the last tooth-shaped pre-pressing tool unit (3) is positioned on the continuous fiber prepreg at the end tail of the tooth-shaped part forming die (2), and sequentially taking out the tooth-shaped pre-pressing tool units (3) from the end head to the end tail of the tooth-shaped part forming die (2) to finish the laying of a first layer of continuous fiber prepreg;
(4) Repeating the steps (2) to (3) until the number of layers of the continuous fiber prepreg layers reaches the designed number of layers; adsorbing a plurality of tooth-shaped pre-pressing tool units (3) into a whole to form a blank integral fixing tool (4); performing continuous fiber prepreg in a tooth-shaped part forming die (2) by using a blank integral fixing tool (4) to obtain a product blank; (5) And transferring the tooth-shaped part forming die (2) to curing forming equipment for curing forming.
2. The forming process according to claim 1, wherein the specific operation of performing by using the blank integral fixing tool (4) in the step (5) is as follows:
placing a blank integral fixing tool (4) on a continuous fiber prepreg in a tooth-shaped part forming die (2);
a pressing plate is placed on the blank integral fixing tool (4), and the tooth-shaped part forming die (2) is placed on a laminated panel of a hot press;
and under the condition of cold pressing or low-temperature hot pressing, applying preset pressure to the blank integral fixing tool (4), and performing preforming on the continuous fiber prepreg blank by the blank integral fixing tool (4) until the continuous fiber prepreg is filled fully in the tooth part die cavity.
3. The molding process according to claim 1, wherein in the step (5), the plurality of tooth-shaped pre-pressing tooling units (3) are overlapped and adsorbed together by means of magnetic force.
4. The molding process according to claim 1, wherein the continuous fiber prepreg of step (1) is cut to a length corresponding to an axial curved surface of the tooth part.
5. The molding process according to claim 1, wherein the number of layers of the continuous fiber prepreg layup of step (1) is determined by the thickness of the tooth part.
6. The molding process according to claim 1, wherein a release agent is applied to the inside of the tooth part molding die (2) in the step (1).
7. The molding process according to claim 6, wherein the coating is applied by:
uniformly coating a release agent on a tooth part die cavity of a tooth part forming die (2), standing for 15min at room temperature to form a coating;
repeating the above steps for 2-3 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385263.9A CN113021948B (en) | 2021-04-09 | 2021-04-09 | Forming tool and process for continuous fiber reinforced resin matrix composite gear parts |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110385263.9A CN113021948B (en) | 2021-04-09 | 2021-04-09 | Forming tool and process for continuous fiber reinforced resin matrix composite gear parts |
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| CN113021948A CN113021948A (en) | 2021-06-25 |
| CN113021948B true CN113021948B (en) | 2023-02-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665001A (en) * | 2009-09-17 | 2010-03-10 | 哈尔滨工业大学 | Preparation process of composite material corrugated sandwich plates |
| CN101722657A (en) * | 2009-11-24 | 2010-06-09 | 南京航空航天大学 | Device for molding shape memory alloy embedded corrugated envelope and manufacturing method |
| CN104385627A (en) * | 2014-10-14 | 2015-03-04 | 山东大学 | Advanced resin-based composite material with anti-lightning surface function layer, and preparation method thereof |
| CN104723579A (en) * | 2015-04-13 | 2015-06-24 | 哈尔滨工业大学 | Assembling mold for all-composite corrugated sandwich cylindrical shells |
| CN110253722A (en) * | 2019-04-22 | 2019-09-20 | 湖南远辉复合材料有限公司 | A kind of composite material dot matrix structure fiber preform integrally forming mould |
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2021
- 2021-04-09 CN CN202110385263.9A patent/CN113021948B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665001A (en) * | 2009-09-17 | 2010-03-10 | 哈尔滨工业大学 | Preparation process of composite material corrugated sandwich plates |
| CN101722657A (en) * | 2009-11-24 | 2010-06-09 | 南京航空航天大学 | Device for molding shape memory alloy embedded corrugated envelope and manufacturing method |
| CN104385627A (en) * | 2014-10-14 | 2015-03-04 | 山东大学 | Advanced resin-based composite material with anti-lightning surface function layer, and preparation method thereof |
| CN104723579A (en) * | 2015-04-13 | 2015-06-24 | 哈尔滨工业大学 | Assembling mold for all-composite corrugated sandwich cylindrical shells |
| CN110253722A (en) * | 2019-04-22 | 2019-09-20 | 湖南远辉复合材料有限公司 | A kind of composite material dot matrix structure fiber preform integrally forming mould |
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