CN1174820C - Machining process of bidirectional elliptic bend - Google Patents
Machining process of bidirectional elliptic bend Download PDFInfo
- Publication number
- CN1174820C CN1174820C CNB011274093A CN01127409A CN1174820C CN 1174820 C CN1174820 C CN 1174820C CN B011274093 A CNB011274093 A CN B011274093A CN 01127409 A CN01127409 A CN 01127409A CN 1174820 C CN1174820 C CN 1174820C
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- Prior art keywords
- elbow
- elliptic
- bidirectional
- elliptical
- flat
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- Expired - Fee Related
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Abstract
The present invention relates to a machining method of a bidirectional elliptic elbow, which belongs to the technology of pipe forming and is characterized in that a steel pipe is put in a pipe bender and is toasted to form a flat elbow of 180 degrees by a circular mold on the pipe bender at room temperature; the toasted flat elbow is heated to 550 to 600 DEG C and then is embedded into an elliptical clamping fixture of 180 degrees, which is composed of an upper mold and a lower mold; the flat elbow is pressed to form an elliptical flat elbow and then is heated to 550 to 600 DEG C; the elliptical flat elbow is embedded into a bending elliptical clamping fixture which is composed of an upper mold and a lower mold and has the same cross-sectional shape with the elliptical clamping fixture, so the elliptical flat elbow is pressed to form a bending elliptical elbow shape; thermal insulation is carried out for 30 minutes at the temperature of 580 to 620 DEG C; annealing processing is carried out, and furnace temperature is cooled to 400 DEG C; then natural cooling is carried out; finally, surface derusting is carried out. The machining method of a bidirectional elliptic elbow of the present invention solves the problem of the machining technology of the elliptic elbow, and moreover, the machining method not only can ensure work time for the repair of devices, but also can greatly reduce cost and the foreign exchange disbursements of enterprises.
Description
Technical field
The invention belongs to the technology of pipe fitting forming, relate generally to the manufacturing technology of elbow in the condenser.
Background technology
In the petrochemical iy produced process, the phthalic anhydride switch condenser is a kind of important equipment.This kind equipment of China mostly is import, does not have experience and the technology made.And in the phthalic anhydride switch condenser, the bidirectional elliptic elbow is one of its most important parts, because it is complex-shaped, during maintain and replace, all needs this product of import, not only influences the duration, and costs an arm and a leg.Through the retrieval Chinese patent database, number of patent application 90104674.1, denomination of invention is the application for a patent for invention of " shaping method for stainless steel bend ", a kind of manufacturing process of stainless steel bend is disclosed, it mainly adopts cold working, the standard elbow is processed the processing of inapplicable bidirectional elliptic elbow.
Summary of the invention
The purpose of this invention is to provide a kind of processing that is exclusively used in oval elbow, and convenient and easy, be convenient to the manufacture method of the bidirectional elliptic elbow operating and grasp.
The manufacture method of bidirectional elliptic elbow of the present invention, it is characterized in that steel pipe is put into bending machine, with mould it is simmered into 180 ° flat elbow on the bending machine at room temperature, the flat elbow of simmering is heated to 550-600 ℃, inserting 180 ° of cross sections being made up of mould up and down is in the oval mold, being pressed into cross section is oval flat elbow, and then be heated to 550-600 ℃, insert by mould up and down and form, in the shape of cross section crooked oval mold identical with oval mould, suppress the oval elbow shape that becomes 7-9 ° bending with bidirectional elliptic elbow end face axis, and under 580-620 ℃, be incubated 30 minutes, and carry out annealing in process, furnace temperature is cooled to 400 ℃, naturally cool to room temperature then, carry out surface derusting at last.Moulding and carry out surface derusting after oval elbow using ultrasound ripple and MT (magnetic powder inspection) micro-crack of checking the surface.
The manufacture method of bidirectional elliptic elbow of the present invention has solved the technological problems that oval elbow is made, and not only can guarantee the duration of maintenance of equipment, and greatly reduce cost, has reduced the foreign exchange expenditure of enterprise.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the bidirectional elliptic elbow front view that the present invention produces;
Fig. 2 is the left view of bidirectional elliptic elbow of the present invention;
Fig. 3 is the vertical view of bidirectional elliptic elbow of the present invention;
Fig. 4 is the oval crooked counterdie structural representation of moulding of the present invention;
Fig. 5 is that the B of Fig. 4 is to view;
Fig. 6 is the A---A cutaway view of Fig. 4.
The specific embodiment
Elliptical periphery according to Fig. 1, Fig. 2, bidirectional elliptic elbow cross section shown in Figure 3 is long, select the identical round steel pipe (as selecting diameter is φ 32mm, and thickness is the 10# steel pipe of 2.5mm) of girth, on the bending machine at room temperature, with common rounded bend mould, simmer into earlier 180 ° flat elbow; The flat elbow that to simmer is then put into heating furnace and is heated to 550-600 ℃, inserts shape shown in Figure 5, and in the oval mold of being made up of upper and lower mould, to be pressed into cross section on the 100T forcing press be oval flat elbow; And then the oval flat elbow that will be pressed into is heated to 550-600 ℃, insert in the mold that cross sectional shape crooked bed die shown in Figure 6 and mold (with Fig. 6 symmetry) form, on the 100T forcing press, suppress with bidirectional elliptic elbow end face axis and become the 7-9 ° of oval elbow of bending; With the bidirectional elliptic elbow of moulding, place in the annealing furnace, insulation is 30 minutes under 580-620 ℃ of temperature, carries out annealing in process again, and furnace temperature is cooled to 400 ℃, naturally cools to room temperature then; Product after will annealing again carries out surface derusting; And using ultrasound ripple and MT (magnetic powder inspection) inspection, if the surface does not have micro-crack, be finished product, finish its manufacturing process overall process.
Claims (2)
1, a kind of manufacture method of bidirectional elliptic elbow, it is characterized in that steel pipe is put into bending machine, with mould it is simmered into 180 ° flat elbow on the bending machine at room temperature, the flat elbow of simmering is heated to 550-600 ℃, inserting 180 ° of cross sections being made up of mould up and down is in the oval mold, being pressed into cross section is oval flat elbow, and then be heated to 550-600 ℃, insert by mould up and down and form, in the shape of cross section crooked oval mold identical with oval mould, suppress the oval elbow shape that becomes 7-9 ° bending with bidirectional elliptic elbow end face axis, and under 580-620 ℃, be incubated 30 minutes, and carry out annealing in process, furnace temperature is cooled to 400 ℃, naturally cool to room temperature then, carry out surface derusting at last.
2, the manufacture method of bidirectional elliptic elbow according to claim 1, the oval elbow using ultrasound ripple after it is characterized in that moulding and carrying out surface derusting and the micro-crack on magnetic particle testing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011274093A CN1174820C (en) | 2001-09-12 | 2001-09-12 | Machining process of bidirectional elliptic bend |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011274093A CN1174820C (en) | 2001-09-12 | 2001-09-12 | Machining process of bidirectional elliptic bend |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1403223A CN1403223A (en) | 2003-03-19 |
| CN1174820C true CN1174820C (en) | 2004-11-10 |
Family
ID=4667366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011274093A Expired - Fee Related CN1174820C (en) | 2001-09-12 | 2001-09-12 | Machining process of bidirectional elliptic bend |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1174820C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102029676B (en) * | 2010-11-24 | 2013-04-24 | 沈阳建筑大学 | Method for eliminating air bubbles on surface of casting polyurethane elastomer product |
| CN106392497B (en) * | 2016-11-24 | 2019-01-11 | 陈浩祥 | Press the preparation method of elbow |
-
2001
- 2001-09-12 CN CNB011274093A patent/CN1174820C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1403223A (en) | 2003-03-19 |
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Legal Events
| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |