CN101758617A - Core pulling method for slender composite pipe - Google Patents
Core pulling method for slender composite pipe Download PDFInfo
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- CN101758617A CN101758617A CN200910216657A CN200910216657A CN101758617A CN 101758617 A CN101758617 A CN 101758617A CN 200910216657 A CN200910216657 A CN 200910216657A CN 200910216657 A CN200910216657 A CN 200910216657A CN 101758617 A CN101758617 A CN 101758617A
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- composite pipe
- core pulling
- slender
- pulling method
- silk
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Abstract
The invention provides a core pulling method for a slender composite pipe. The method comprises the following steps: spirally winding a layer of finished round wires on the excircle of an entire spindle, then laying release cloth on the excircle of the finished round wire layer, laying a composite material layer on the excircle of the release cloth, and pulling out the spirally winded wires after the composite pipe is heated, solidified and molded. By using the method, the core pulling efficiency for the slender composite pipe can be remarkably improved, and the production cost can be reduced. The problems of large length-diameter ratio and difficult core pulling for slender pipe-shaped composite parts with poor rigidity can be solved. The core pulling method has the advantages of small core pulling difficulty, simple spindle structure, low cost and no damage to the composite pipe; The manufacturing cost is one fifth of the manufacturing cost in the split spindle method in the prior art.
Description
Technical field
The present invention relates to a kind of core pulling method of slender composite pipe.
Background technology
In the prior art, tubular multiple material part is earlier at mandrel upper berth one deck release cloth, at the composite of shop, release cloth surface required thickness, advances the autoclave heating cure then again, extracts mandrel out at last and the multiple material pipe finished.Said method is effective for the short tubular multiple material part of length.Resistance is little because short tube is loosed core, and the whole mandrel of extracting out is realized loosing core easily.In case pipe-shaped parts length surpasses certain limit, the resistance of loosing core will become very big, and the whole mandrel of extracting out will become very difficult, sometimes even pull open multiple material part pipe fitting.
Big for solving draw ratio, the loose core problem of difficulty of the multiple material part of poor rigidity elongate tubular, prior art have adopted the shaping of the whole mandrel design mix lobe formula scheme of loosing core.The split-type mandrel is that mandrel dimidiation semicolumn mandrel is inserted, in the two halves semicolumn mandrel centered cylinder of therebetween of inserting, the newel bilateral symmetry link to each other one with mandrel with the rectangle mandrel of fox the sheet of inserting, then, with steel split-type of their involutory fit formation mandrel of inserting.The prior art split-type mandrel weak point is:
The mandrel poor rigidity of inserting, the combination post gap is big, and the composite pipe linearity and the tangent plane profile tolerance of production are low.Draw ratio is big because each mandrel is inserted, poor rigidity, and tangent plane shape more complicated, the machining distortion is big, is difficult to guarantee high-precision linearity and tangent plane profile tolerance (error surpasses 0.25mm); Because linearity and the tangent plane profile tolerance is low and gravity produces than macrobending, make the apposition position gap of respectively inserting reach more than the 0.5mm, even after spreading release cloth, interlude still produces cydariform, can't reach the element precision requirement.
The difficulty of loosing core is easily torn pipe fitting.Because three is the face contact between inserting, frictional resistance is big, and it is still very difficult once to loose core.
The mandrel interchangeability of inserting is poor.The error of respectively inserting is big, and the composite pipe of different mandrel productions can not exchange; Next is the mandrel complex structure, and difficulty of processing is big, and the manufacturing cycle is long, the cost height.
Summary of the invention
The objective of the invention is the problem at above-mentioned prior art existence, it is little to propose a kind of difficulty of loosing core, and mandrel is simple in structure, and cost is low, does not injure the core pulling method of composite pipe.
Above-mentioned purpose of the present invention can reach by following measure.It is characterized in that comprising the steps: that spiral twines one deck light circle silk on whole mandrel cylindrical, then at described light circle silk layer cylindrical upper berth release cloth, on described release cloth cylindrical, lay composite layer, treat composite pipe heating cure moulding after, pull out spiral and twine silk.
The present invention has following beneficial effect than prior art.
(1) integral core axle construction is simple, and good rigidly can be realized high accuracy processing, and linearity, roughness and profile tolerance are good;
(2) light circle silk is elongated, and surface-brightening and is that line contact between mandrel, the release cloth, and frictional resistance is little, and it is easy to draw outward;
(3) light circle silk is elongated, and the intensity height is difficult for breaking;
(4) elongated light circle silk size is accurate, and interchangeability is good, and buying is with low cost easily;
(5) the outer light circle silk that draws can not injure composite pipe;
(6) cost is low, composite pipe precision height.Manufacturing cost is 1/5th of a split-type mandrel, and the manufacturing cycle is a split-type mandrel 1/3rd.And the composite pipe precision can improve (linearity and profile tolerance error are less than 0.1mm) more than 5 times;
(7) adopt the present invention,, not only can produce thin and long circular axis shape pipe fitting, can also produce the elongated tangent plane tubular piece that waits, as oval tangent plane as long as change the mandrel shape.
The specific embodiment
Further specify the present invention below by embodiment.In following examples, spiral twines the higher light circle silk 2 of one deck intensity on whole mandrel 1 cylindrical.Light circle silk can filament, such as elongated iron wire, the plating road thin wire of surface-brightening, even can also be copper wire.Also can be nonmetal high-strength filaments, such as surface-brightening nylon yarn, silica gel silk, PVC plastics silk.But not getting rid of light circle silk is flat filament.On above-mentioned light circle silk layer cylindrical, lay release cloth then, on the release cloth cylindrical, lay composite layer afterwards.According to a conventional method, they are put into the autoclave heating cure, treat the composite pipe curing molding after, outer bracing wire one end just can be realized loosing core fast under the condition that does not injure release cloth and composite pipe.Remove release cloth, take off composite material forming pipe fitting spare.
For the elongated tangent plane tubular piece that waits, loose core as the multiple material part forming of oval tangent plane elongate tubular, only need mandrel alteration of form ovalisation is got final product, the pipe fitting of other shapes too like this mode carry out.
For the overlength composite pipe, whole mandrel segmentation can be threaded.The mandrel that segmentation is threaded can divide two sections connections by screw thread.When iron wire is pulled out to butt joint thread separation position, the rotation screw thread, mandrel is taken off at branch two respectively, and it is easier that iron wire is pulled out.Twine elongated bright iron wire at its surperficial spiral, the high-quality slender composite pipe that under high-precision condition, is shaped, after, pull outward from iron wire one end, can extract iron wire fast out, can loose core fast under the gapped situation between mandrel and the composite pipe, can not injure pipe fitting.
Claims (5)
1. the core pulling method of a slender composite pipe, it is characterized in that comprising the steps: that spiral twines one deck light circle silk on whole mandrel cylindrical, then at described light circle silk layer cylindrical upper berth release cloth, on described release cloth cylindrical, lay composite layer, after treating composite pipe heating cure moulding, pull out spiral and twine silk.
2. the core pulling method of slender composite pipe as claimed in claim 1 is characterized in that, described light circle silk is filament or nonmetallic high-strength filaments.
3. the core pulling method of slender composite pipe as claimed in claim 1, described high-strength filaments is nylon yarn, silica gel silk or PVC plastics silk.
4. the core pulling method of slender composite pipe as claimed in claim 1, iron wire, stainless steel wire or the copper wire of described high-strength filaments Shi Du Chrome, metal species filament.
5. the core pulling method of slender composite pipe as claimed in claim 1 is characterized in that, described mandrel divides two sections connections by screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910216657A CN101758617A (en) | 2009-12-09 | 2009-12-09 | Core pulling method for slender composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910216657A CN101758617A (en) | 2009-12-09 | 2009-12-09 | Core pulling method for slender composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101758617A true CN101758617A (en) | 2010-06-30 |
Family
ID=42490074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910216657A Pending CN101758617A (en) | 2009-12-09 | 2009-12-09 | Core pulling method for slender composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101758617A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109278360A (en) * | 2018-09-05 | 2019-01-29 | 镇江市鑫泰绝缘材料有限公司 | A kind of insulation wrinkle paper tube pumping pricker blanking device |
| CN113733597A (en) * | 2021-09-15 | 2021-12-03 | 广东汇天航空航天科技有限公司 | Composite material part forming method, closed beam and automobile |
-
2009
- 2009-12-09 CN CN200910216657A patent/CN101758617A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109278360A (en) * | 2018-09-05 | 2019-01-29 | 镇江市鑫泰绝缘材料有限公司 | A kind of insulation wrinkle paper tube pumping pricker blanking device |
| CN109278360B (en) * | 2018-09-05 | 2020-04-07 | 镇江市鑫泰绝缘材料有限公司 | Insulating crepe paper tube drawing drill rod blanking device |
| CN113733597A (en) * | 2021-09-15 | 2021-12-03 | 广东汇天航空航天科技有限公司 | Composite material part forming method, closed beam and automobile |
| CN113733597B (en) * | 2021-09-15 | 2022-12-20 | 广东汇天航空航天科技有限公司 | Composite material part forming method, closed beam and automobile |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100630 |