CN1432441A - Making process of conic middle tube - Google Patents
Making process of conic middle tube Download PDFInfo
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- CN1432441A CN1432441A CN 02102601 CN02102601A CN1432441A CN 1432441 A CN1432441 A CN 1432441A CN 02102601 CN02102601 CN 02102601 CN 02102601 A CN02102601 A CN 02102601A CN 1432441 A CN1432441 A CN 1432441A
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- pipe
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- 238000000034 method Methods 0.000 title description 4
- 230000008569 process Effects 0.000 title description 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The present invention relates to furniture producing technology. One conic die, which has lower end inner diameter equal to the outer diameter of one cylindrical steel pipe and upper inner diameter slightly smaller than the diameter of one cylindrical steel pipe, is pressed into the steel pipe from its one end by means of one oil press to produce conic middle pipe. Compared with available techonlogy, the present invention has the advantages of stable product quality, low cost, low labor strength and others.
Description
The present invention relates to the improvement of the manufacturing process of pipe in the bar chair, belong to the furniture technical field.
Middle pipe is an important spare part of bar chair product, and it is the cylinder of a hollow, is generally steel, and its effect one is that chair pin and seat support are unified into a complete product, the 2nd, and foot-rest ring is inserted in wherein, and rests its middle and lower part proper site.The patent No. 94245276.3 has been invented the middle pipe that tapering is arranged, and it is characterized in that on the correct position of middle pipe tube wall being heated, and makes it evenly expand into cone at heated position simultaneously.This cone shape middle pipe is when the foot-rest ring of assembling bar chair, and it is very convenient just to become, and promptly as long as foot-rest ring is penetrated the middle pipe upper end of making the tapering shape, foot-rest ring falls on the cone-shaped bulge of pipe naturally because of gravity, even if finished fittage.But there are the following problems for this manufacture craft: need heat to expand when making on one side, two people's operational motions are wanted close fit, just can make qualified products, so labour intensity is big, finally can cause the reduction of finished product rate.The 2nd, because manual operations, difficulty makes with being heated evenly around the pipe among a collection of product or one, and the stability of product quality is affected.Make the tube wall attenuation because tube wall expands in addition, fastness descends.
The objective of the invention is to change existing manufacturing technique, make the manufacture craft of pipe in the tapering formula simple, labour intensity reduces, constant product quality, and yield rate improves.
Technical scheme of the present invention is as follows:
The hollow circular cylinder steel pipe of intercepting certain-length, on it, put a mould, this mould is a cylinder cone, the internal diameter of its lower end equates with the original outside diameter of cylinder steel pipe, upper-end inner diameter is slightly littler than cylinder outer diameter of steel pipes, with a power mould is pressed into desired location to cone from steel pipe one end brute force, pipe is promptly calculated completion of processing in the tapering formula.
From above-mentioned machining process as can be seen, the present invention has following advantage:
1, the present invention only uses one pair of mould, and a power can be made pipe in the tapering formula, so manufacture craft becomes very convenient, thereby has alleviated labour intensity greatly, has improved work efficiency.
2, stable and reliable product quality because the present invention influences the parameter of constant product quality, is influenced by mould and die accuracy mainly, and the stability of mould better, so the quality of product will quite stable, thereby has also improved the finished product rate.
3, from manufacturing process, the pipe epimere dwindles in can finding out, hypomere is former big, and mid portion seamlessly transits with cone, thereby tube wall attenuate not only, and some position thickens on the contrary to some extent, therefore in pipe intensity increase.
Accompanying drawing of the present invention:
1, Fig. 1 is the made product structure cutaway view of the present invention.
2, Fig. 2 is the used wherein one pair of mould structure cutaway view of the present invention.
Among the figure: 1 is to manage in pipe, 2 cones, 4 in the tapering formula to manage hypomere, 3 cylinder cone moulds, 6 mould osculums, the big mouth of 7 moulds in the epimere, 5.
The invention will be further described below in conjunction with accompanying drawing:
Referring to Fig. 1, be example by the bar chair product, intercepted length is 55cm, and outer circumference diameter is the cylinder steel pipe of 40mm, and the place of about 33cm is set at the position of cone on it; Get upper-end inner diameter than outer diameter of steel pipes slightly little (6), be 36-38mm, length is at least 1cm, bottom diameter equates that with former outer diameter of steel pipes (7) are 40mm, length is the mould (3) of the cone about 3cm, and it is enclosed within round steel pipe upper end, then with 10 tons of left and right sides hydraulic presses with the disposable cone position that is pressed into setting of above-mentioned mould, process to be and finish.
Another kind of technology preparation method: be that above-mentioned mould is divided into two parts, earlier slightly little than cylindrical steel external diameter of pipe with one, for example internal diameter is the mould of 36-38mm, and it is suitable for reading to the cone position of setting to be pressed into steel pipe with hydraulic press, dwindles outer diameter of steel pipes and makes it become the middle pipe epimere of less external diameter; After identical with a upper-end inner diameter again with the external diameter of pipe in the epimere that has dwindled, the mould that the lower end equates with not reduced outer diameter of steel pipes, it is suitable for reading to penetrate the cone position that Guan Shangzhi sets in the epimere that has dwindled, presses this mould with hydraulic press for the second time, manage in the circular cone type.
No matter manage in the tapering formula that any method is made, pipe epimere (4) external diameter is little than outer diameter of steel pipes in all having, and middle pipe hypomere (5) is former steel pipe overall diameter, and mid portion is cone shape (2), is smooth transition between them.
Claims (4)
1, the manufacturing process of pipe in a kind of tapering formula, it is characterized in that intercepting the hollow circular cylinder steel pipe of certain-length, end at it puts a mould, this mould is a cylinder cone (3), its bottom diameter equates with the original outside diameter of cylinder steel pipe, upper-end inner diameter is slightly littler than cylinder outer diameter of steel pipes, with a power mould is pressed into desired location to cone from steel pipe one end brute force, and pipe is promptly calculated completion of processing in the tapering formula.
2, press the manufacturing process of pipe in the described tapering formula of claim 1, it is characterized in that the mould upper-end inner diameter is slightly littler than cylinder steel pipe, length is at least 1cm, bottom diameter equates with former outer diameter of steel pipes, length is the cone about 3cm, then with hydraulic press with above-mentioned mould is disposable be pressed into the position that the steel pipe cone sets till, processing promptly finishes.
3, press the manufacturing process of pipe in the described tapering formula of claim 1, it is characterized in that earlier with a mould slightly littler than cylindrical steel external diameter of pipe, it is suitable for reading to the cone position of setting to be pressed into steel pipe with hydraulic press, dwindling outer diameter of steel pipes makes it become the middle pipe epimere of less external diameter, after identical with a upper-end inner diameter again with external diameter of pipe in the epimere that has dwindled, the mould that the lower end equates with not reduced former outer diameter of steel pipes, penetrate on the middle pipe epimere that has dwindled suitable for reading to the cone position of setting, for the second time press this mould, pipe processing in the circular cone type with hydraulic press.
4, manage in a kind of tapering formula, it is characterized in that it is made by the manufacturing process of pipe in the tapering formula, pipe epimere (4) external diameter was little than outer diameter of steel pipes during it was shaped as, and middle pipe hypomere (5) is former outer diameter of steel pipes, being cone shape (2) between the two, is smooth transition between them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02102601 CN1432441A (en) | 2002-01-16 | 2002-01-16 | Making process of conic middle tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02102601 CN1432441A (en) | 2002-01-16 | 2002-01-16 | Making process of conic middle tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1432441A true CN1432441A (en) | 2003-07-30 |
Family
ID=27627623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02102601 Pending CN1432441A (en) | 2002-01-16 | 2002-01-16 | Making process of conic middle tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1432441A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100493762C (en) * | 2004-08-31 | 2009-06-03 | 住友金属工业株式会社 | Die, method of manufacturing stepped metal tube, and stepped metal tube |
| CN101386041B (en) * | 2008-10-14 | 2010-06-02 | 浙江东南网架股份有限公司 | Cold roll forming technique of large-sized curve type steel tube |
| CN110316285A (en) * | 2018-03-28 | 2019-10-11 | 本田技研工业株式会社 | The side stand of two-wheeled vehicle and the manufacturing method of side stand |
-
2002
- 2002-01-16 CN CN 02102601 patent/CN1432441A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100493762C (en) * | 2004-08-31 | 2009-06-03 | 住友金属工业株式会社 | Die, method of manufacturing stepped metal tube, and stepped metal tube |
| CN101386041B (en) * | 2008-10-14 | 2010-06-02 | 浙江东南网架股份有限公司 | Cold roll forming technique of large-sized curve type steel tube |
| CN110316285A (en) * | 2018-03-28 | 2019-10-11 | 本田技研工业株式会社 | The side stand of two-wheeled vehicle and the manufacturing method of side stand |
| US11254382B2 (en) | 2018-03-28 | 2022-02-22 | Honda Motor Co., Ltd. | Side-stand for motorcycle and manufacturing method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |