CN108943545B - Composite material drilling method - Google Patents
Composite material drilling method Download PDFInfo
- Publication number
- CN108943545B CN108943545B CN201810763532.9A CN201810763532A CN108943545B CN 108943545 B CN108943545 B CN 108943545B CN 201810763532 A CN201810763532 A CN 201810763532A CN 108943545 B CN108943545 B CN 108943545B
- Authority
- CN
- China
- Prior art keywords
- rod
- positioning hole
- die
- tetrafluoro
- ptfe
- 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.)
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Classifications
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/16—Perforating by tool or tools of the drill type
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention provides a composite material drilling method, which comprises the following steps: preparing a mould: 1) preparing a tetrafluoro rod according to the size of a positioning hole of a forming die, and processing the tetrafluoro rod into a structure the same as that of the positioning hole; 2) inserting the PTFE rod into the positioning hole and cutting off the PTFE rod, wherein the cut-off surface is higher than the tooling surface of the die; 3) knocking the PTFE bar higher than the tooling surface of the die to enable the PTFE bar to be tightly assembled with the positioning hole; 4) the part, higher than the polytetrafluoroethylene rod, of the polytetrafluoroethylene rod is flattened, so that the end part of the polytetrafluoroethylene rod is flush with the tool surface of the die; 5) cutting a piece of demoulding cloth with glue and a piece of glass cloth prepreg to sequentially cover the tetrafluoro rod and compacting; molding: placing the blank on a mould, and then carrying out hot press molding; drilling: after the die is opened, drilling a hole from one side of the molding material far away from the tetrafluoro rod to the other side; and (6) demolding. Compared with the prior art, the PTFE rod is fixed on the positioning hole of the die, so that the support can be provided for later-stage drilling, the conditions of layered tearing of the hole bottom and the hole edge and the like are avoided, and the precision of the product is provided.
Description
Technical Field
The invention relates to the technical field of carbon fiber composite materials, in particular to a composite material drilling method.
Background
In the traditional process of processing and making holes after the composite material is formed, the hole wall and the edges of the holes are easily layered. And after nondestructive testing and appearance testing, the product can not pass the acceptance standard.
Disclosure of Invention
The invention aims to solve the technical problem that in the prior art, the bottom of a hole making area is not supported in the process of forming and making holes by using a composite material, so that the hole wall and the hole edge are easily torn in a layered mode.
The invention solves the technical problems through the following technical scheme:
a composite drilling method comprising the steps of:
preparing a mould:
1) preparing a tetrafluoro rod according to the size of a positioning hole of a forming die, and processing the tetrafluoro rod into a structure the same as that of the positioning hole;
2) inserting the PTFE rod into the positioning hole, and cutting off the PTFE rod, wherein the cut-off surface of the PTFE rod is 2-5 mm higher than the tooling surface of the die;
3) knocking the PTFE bar higher than the tooling surface of the die to enable the PTFE bar to be tightly assembled with the positioning hole;
4) the part, higher than the polytetrafluoroethylene rod, of the polytetrafluoroethylene rod is flattened, so that the end part of the polytetrafluoroethylene rod is flush with the tool surface of the die;
5) cutting a piece of 10mm × 10mm demoulding cloth with glue, sticking the cloth on the mounting surface of a mould, and covering a tetrafluoro rod;
6) covering a layer of glass cloth prepreg which is slightly smaller than the size of the demoulding cloth and has the same resin with the blank on the demoulding cloth, and compacting;
molding:
placing the blank on a mould, and then carrying out hot press molding;
drilling:
after the die is opened, drilling a hole from one side of the molding material far away from the tetrafluoro rod to the other side;
and (6) demolding.
Preferably, in the step 2), if the diameter of the tetrafluoro rod is smaller than that of the positioning hole, adhesive-carrying release cloth or pressure-sensitive adhesive tape is wound on the tetrafluoro rod to ensure that the tetrafluoro rod is tightly matched with the positioning hole.
Preferably, in the step 5), the distance between one side of the demoulding cloth with the glue, which faces to the blank side, and the outer diameter of the positioning hole is not more than 1 mm.
The invention has the advantages that:
through fixed tetrafluoro stick on the locating hole at the mould, can provide the support for later stage drilling, avoid the condition such as hole bottom and hole edge layering are torn, provide the precision of product. A reserved amount is reserved after the tetrafluoro rod is cut off so as to be hammered in the later period, and the assembling tightness of the tetrafluoro rod and the positioning hole is improved.
The size and the margin of the adhesive release cloth are limited within a set range so as to ensure that no mark is left on the product.
Detailed Description
In order to provide a further understanding and appreciation for the structural features and advantages achieved by the present invention, a detailed description of the preferred embodiments is provided below:
a composite material drilling method relates to a hot-press forming die, and a blank is placed into the hot-press forming die and is subjected to hot-press forming. The tool surface of the die is provided with a positioning hole, and the bottom of the positioning hole is a conical section. The method comprises the following steps:
preparing a mould:
1) preparing a tetrafluoro rod according to the size of a positioning hole of a forming die, and processing the tetrafluoro rod into a structure the same as that of the positioning hole; generally, the bottom of the positioning hole is chamfered, so that one end of the tetrafluoro rod needs to be chamfered, namely, one end of the tetrafluoro rod is cut by an art designer to form a conical section matched with the shape of the bottom of the positioning hole, so that the tetrafluoro rod can be inserted into the bottom of the hole;
2) inserting the PTFE rod into the positioning hole, and cutting off the PTFE rod, wherein the cut-off surface of the PTFE rod is 2-5 mm higher than the tooling surface of the die; if the diameter of the PTFE rod is smaller than that of the positioning hole, firstly winding release cloth with adhesive or a pressure-sensitive adhesive tape on the PTFE rod to ensure that the PTFE rod is tightly matched with the positioning hole;
3) knocking the tetrafluoro rod higher than the die tooling surface by a wood or rubber hammer to further tightly assemble the tetrafluoro rod and the positioning hole;
4) the part, higher than the polytetrafluoroethylene rod, of the polytetrafluoroethylene rod is flattened, so that the end part of the polytetrafluoroethylene rod is flush with the tool surface of the die;
5) cutting a piece of demoulding cloth with glue of × 10mm, sticking the demoulding cloth with glue on the mounting surface of the mould, and covering the tetrafluoro rod on the demoulding cloth with glue, wherein the distance between one side of the demoulding cloth with glue, which faces to the blank side, and the outer diameter of the positioning hole is not more than 1 mm;
6) covering a layer of glass cloth prepreg which is slightly smaller than the size of the demoulding cloth and has the same resin with the blank on the demoulding cloth, and compacting;
molding:
placing the blank on a mould, and then carrying out hot press molding;
drilling:
after the die is opened, drilling a hole from one side of the molding material far away from the tetrafluoro rod to the other side; in the drilling process, the PTFE rod supports the positioning hole at the bottom of the material, so that the edge of the hole is not layered or torn.
And (6) demolding.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A composite drilling method, characterized by: the method comprises the following steps:
preparing a mould:
1) preparing a tetrafluoro rod according to the size of a positioning hole of a forming die, and processing the tetrafluoro rod into a structure the same as that of the positioning hole;
2) inserting the PTFE rod into the positioning hole, and cutting off the PTFE rod, wherein the cut-off surface of the PTFE rod is 2-5 mm higher than the tooling surface of the die;
3) knocking the PTFE bar higher than the tooling surface of the die to enable the PTFE bar to be tightly assembled with the positioning hole;
4) the part, higher than the polytetrafluoroethylene rod, of the polytetrafluoroethylene rod is flattened, so that the end part of the polytetrafluoroethylene rod is flush with the tool surface of the die;
5) cutting a piece of demoulding cloth with glue of × 10mm, sticking the demoulding cloth with glue on the mounting surface of the mould, and covering the tetrafluoro rod on the demoulding cloth with glue, wherein the distance between one side of the demoulding cloth with glue, which faces to the blank side, and the outer diameter of the positioning hole is not more than 1 mm;
6) covering a layer of glass cloth prepreg which is slightly smaller than the size of the demoulding cloth and has the same resin with the blank on the demoulding cloth, and compacting;
molding:
placing the blank on a mould, and then carrying out hot press molding;
drilling:
after the die is opened, drilling a hole from one side of the molding material far away from the tetrafluoro rod to the other side;
and (6) demolding.
2. A composite drilling method according to claim 1, characterized in that: in the step 2), if the diameter of the tetrafluoro rod is smaller than that of the positioning hole, adhesive-carrying release cloth or pressure-sensitive adhesive tape is firstly wound on the tetrafluoro rod to ensure that the tetrafluoro rod is tightly matched with the positioning hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763532.9A CN108943545B (en) | 2018-07-12 | 2018-07-12 | Composite material drilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810763532.9A CN108943545B (en) | 2018-07-12 | 2018-07-12 | Composite material drilling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108943545A CN108943545A (en) | 2018-12-07 |
| CN108943545B true CN108943545B (en) | 2020-07-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810763532.9A Active CN108943545B (en) | 2018-07-12 | 2018-07-12 | Composite material drilling method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108943545B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459199A (en) * | 2021-06-24 | 2021-10-01 | 成都飞机工业（集团）有限责任公司 | Hole making method for porous similar skin part |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0089755A3 (en) * | 1982-03-11 | 1985-05-15 | WESTLAND plc | Method of producing apertures in fibre-reinforced articles such as helicopter rotor blades |
| US6451241B1 (en) * | 1996-02-01 | 2002-09-17 | Mra Systems, Inc. | Method for fabrication of perforated composite |
| GB0127232D0 (en) * | 2001-11-13 | 2002-01-02 | Bae Systems Plc | A datum system for use in moulding operations |
| CN104999514A (en) * | 2014-04-21 | 2015-10-28 | 哈尔滨飞机工业集团有限责任公司 | Drilling method for structure assemblage of carbon fiber composite material |
| CN105729834A (en) * | 2016-02-23 | 2016-07-06 | 哈尔滨飞机工业集团有限责任公司 | Production method for assembling hole of composite material part |
| CN105666578B (en) * | 2016-03-12 | 2017-10-10 | 安徽佳力奇碳纤维科技股份公司 | A kind of substep drilling equipment of carbon fibre composite |
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2018
- 2018-07-12 CN CN201810763532.9A patent/CN108943545B/en active Active
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| Publication number | Publication date |
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| CN108943545A (en) | 2018-12-07 |
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Address after: 234000 Chaoyang Road 169, Suzhou High-tech Industrial Park, Anhui Province Patentee after: Anhui jialiqi Advanced Composite Technology Co.,Ltd. Address before: 234000 Chaoyang Road 169, Suzhou High-tech Industrial Park, Anhui Province Patentee before: ANHUI JIALIQI AEROSPACE CARBON FIBER Co.,Ltd. |
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