CN100445627C - Preparation method of Y-shaped hot-pressed three-way pipe fitting - Google Patents
Preparation method of Y-shaped hot-pressed three-way pipe fitting Download PDFInfo
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- CN100445627C CN100445627C CNB2006100125233A CN200610012523A CN100445627C CN 100445627 C CN100445627 C CN 100445627C CN B2006100125233 A CNB2006100125233 A CN B2006100125233A CN 200610012523 A CN200610012523 A CN 200610012523A CN 100445627 C CN100445627 C CN 100445627C
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- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000007731 hot pressing Methods 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000003754 machining Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 240000007241 Agrostis stolonifera Species 0.000 claims description 6
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- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 6
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- 238000012360 testing method Methods 0.000 abstract description 3
- 230000001066 destructive effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005242 forging Methods 0.000 description 4
- 238000001192 hot extrusion Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004429 Calibre Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention relates to a preparation method of a Y-shaped hot-pressed tee joint, which belongs to the technical field of the processing of metal pipe fittings and is used for solving the problem of hot-pressed processing of a seamless Y-shaped tee-joint pipe with a large caliber. The technology of the present invention is composed of the procedures of blank selection, hot pressing, bending, machine work, etc., wherein the hot pressing procedure firstly heats a blank and then presses the blank to form a T-shaped tee-joint blank; subsequently, the bending procedure heats the T-shaped tee-joint blank and then presses a main pipe to bend so as to make into a Y-shaped tee-joint blank. The method of the present invention is suitable for making a Y-shaped tee joint of a metal pipeline, wherein Dn is from 100mm to 1000mm, and the proportion of a diameter to wall thickness is less then or equal to 14. The method has low mould investing expenses and can uses a standard tee joint and a bend mould with a short radius, and moreover, the method has the advantages of simple process and easy operation. All performance indexes (appearance dimension, tolerance of form and position, non-destructive inspection, physicochemical test, etc.) of the Y-shaped tee joint processed by the method reach the requirements of relative standards, and the present invention solves the problem of processing of a seamless Y-shaped tee joint with a large caliber and has a leading technical industrial level.
Description
Technical field
Type of the present invention relates to a kind of pipe fitting preparation method, especially for the preparation method of the seamless Y-type three way type of discharge pressure liquid or gas, belongs to the metal pipe element processing technique field.
Background technique
Seam-less T-joint is the important pipe fitting that industry pipework such as oil, chemical industry, electric power, metallurgy are used, usually as discharge pressure liquid or gas such as oil, rock gas, coal gas, water and some solid material etc.Seam-less T-joint is higher and will bear certain pressure as the common operating temperature of pipeline of the above-mentioned medium of transmission, therefore its mechanical property, physicochemical property is had relatively high expectations.The manufacturing process of seam-less T-joint can realize that for small-bore pipe wide tee is then finished by forging machine processing or hot extrusion by cold hobbing.For heavy caliber Y type seam-less T-joint, such as the seamless metal pipe threeway of Dn100mm～1000mm, diameter/wall thickness≤14, its geometrical shape is than T shape threeway complexity, and difficulty of processing is also relatively large.Some less demanding Y type seam-less T-joint can adopt the method for cast form, but the loosening of foundry goods interior tissue, be mingled with, defective such as pore, make it be difficult to the mechanical performance index that reaches higher.Also having a kind of more common method is to forge the threeway blank earlier, finishes through the method for machining again, and the shortcoming of this method is, long processing time, consume material, its stock utilization only can reach 60%, the three-way pipe streamline is bad after the moulding, easily produces liquid flowing resistance.In view of this, the Professional visitors tries to explore the hot extrusion forming process of Y type seam-less T-joint, as disclosing a kind of manufacture method of Y type seam-less T-joint in the Chinese patent 00105645, this method with seamless steel pipe as forging stock, forging stock slightly is a cydariform through the heating pier, last specialized mould bending forming obtains finished product through integer again.The problem that this method exists is, the machining process complexity, and specialized mould is made difficulty, cost of production is higher, so fail to apply.
Summary of the invention
Technical problem to be solved by this invention be overcome the defective of above-mentioned prior art and provide that a kind of technology is simple, Mold Making easily, the preparation method of the Y shape hot-pressed three-way pipe fitting that is easy to realize.
The alleged problem of the present invention is solved by following technological scheme:
A kind of preparation method of Y shape hot-pressed three-way pipe fitting, it is undertaken by following operation:
A. select base: select diameter greater than the seamless steel pipe of 1.15～1.9 times of threeway finished product predominant tube diameter or forge tube coupling as threeway blank 1;
B. hot pressing: threeway blank 1 is heated to the austenitic area, on press machine, is pressed into T shape three-way shape blank 2 with mould;
C. bent type: the T shape three-way shape blank 2 after the hot pressing is heated to the austenitic area again, on press machine, will be responsible for the position and bends, till the supreme bed die matched moulds, make Y-type three way type shape blank 3 with mould;
D. machining: remove Y-type three way type shape blank 3 each end surplus, and port is carried out by the mouth cutting to design size.
The preparation method of above-mentioned Y shape hot-pressed three-way pipe fitting, the mould that uses in the described hot pressing process is 2.5～4 times that Y shape threeway finished product is responsible for intended diameter for the T shape threeway mould at lengthening person in charge position, the length at its mold charge position 8; The mould that uses in the described bent type operation is the holed short radius elbow mould of counterdie, bed die 9 bottoms of described short radius elbow mould are provided with the tap 10 that is complementary with the arm diameter, and the crooked short radius of described short radius elbow upper mould tool 11 equates with predominant tube diameter numerical value.
The preparation method of above-mentioned Y shape hot-pressed three-way pipe fitting, blank heating temperature is 950～1200 ℃ in described hot pressing and the bent type operation.
The preparation method of above-mentioned Y shape hot-pressed three-way pipe fitting, each compacting amount of feed is 20～50 millimeters in the described hot pressing process, heating and compacting hocket, till mould matched moulds up and down.
The preparation method of above-mentioned Y shape hot-pressed three-way pipe fitting, the material of described seamless steel pipe or hammer welded pipe are carbon steel, alloy steel or stainless steel.
The inventive method is applicable to makes Dn100mm～1000mm, the metallic conduit Y-type three way type of diameter/wall thickness≤14.It is low that this method drops into die cost, can apply mechanically T shape threeway mould and short radius elbow mould, and manufacturing process is simple, easy operating.The Y-type three way type that adopts this method to process, beautiful shape, inwall corner transition slyness, the passage streamline is reasonable, and the inside angle of having avoided the forging machining to form helps media flow, and using effect is good.This method stock utilization can reach 90%, greatly reduces the cost of production of pipeline.After testing, adopt the Y-type three way type of this method processing, every performance index such as apparent size, form and position tolerance, non-destructive inspection, physics and chemistry test all can satisfy the relevant criterion requirement.The invention solves the processing difficult problem of large-calibre seamless Y-type three way type, technological level occupies first place.
Description of drawings
Fig. 1 is the threeway blank;
Fig. 2 is the T shape three-way shape blank of making behind the hot pressing process;
Fig. 3 is the Y-type three way type shape blank of making after the bent type operation;
Fig. 4 is the Y-type three way type finished product;
Fig. 5 is a T shape threeway mould structure schematic representation; Fig. 6 is the left view of Fig. 5;
Fig. 7 is a short radius elbow mould structure schematic representation; Fig. 8 is the left view of Fig. 7.
Each label implication is among the figure: 1. threeway blank; 2.T shape three-way shape blank; 3.Y type three-way shape blank; 4.Y type threeway finished product; 5.Y the type threeway is responsible for; 6.Y type tee branch; 7.T shape three-way shape blank mold; 8. be responsible for the position accordingly; 9. the bed die of short radius elbow mould; 10. tap; 11. the upper die tooling of short radius elbow mould.
Embodiment
The inventive method is applicable to makes the Y shape seam-less T-joint that bears mesohigh, and product specification is: Dn100mm～1000mm, diameter/wall thickness≤14, material are carbon constructional quality steel, Alloy Constructional Steel, stainless-steel seamless pipe or forge tube coupling.Its course of working is mainly the hot-pressed operation of twice.Referring to Fig. 1, at first selecting diameter to be responsible for the seamless steel pipe of 1.15～1.9 times of (so-called be responsible for the straight tube that is meant in the T shape or the appropriate section after its moulding) diameters or to forge tube coupling greater than the threeway finished product is threeway blank 1; In hot pressing process, adopt lengthening to be responsible for the T shape threeway mould at position then, on pressworking equipment,, suppress T shape three-way shape blank 2, as shown in Figure 2 through pressurization gradually.The tonnage of pressure facility is relevant with the specification of processed piece, corresponding above-mentioned specification, and adopting tonnage is 1000～3500 tons.In hot extrusion process, suppress the amount of feed is 20～50 millimeters at every turn, and heating and compacting hocket, till mould matched moulds up and down; The bent type operation of carrying out subsequently will be heated to the austenitic area again through the T shape three-way shape blank after the hot pressing, on the holed short radius elbow mould of counterdie the person in charge will be suppressed into Y-type three way type shape blank 3, as shown in Figure 3; At last the Y-type three way type port is carried out machining, make finished product Y-type three way type 4, as shown in Figure 4.Referring to Fig. 5, Fig. 6, in hot-pressed operation, the length at the corresponding person in charge position 8 of employed T shape threeway mould 7 is 2.5～4 times of Y shape threeway finished product predominant tube diameter.Referring to Fig. 7, Fig. 8, employed short radius elbow mould is provided with tap 10 in its bed die 9 bottoms in bent type operation, the diameter of aperture and Y-type three way type arm 6 is complementary, and the crooked short radius of short radius elbow upper mould tool 11 equates with predominant tube diameter numerical value.
Several specific embodiments below are provided:
A. select base: the seamless steel pipe material: No. 20 steel; Specification: Dn100mm, wall thickness are 10mm;
B. hot pressing:, in T shape threeway mould, be pressed into T shape three-way shape blank with blank heating to 980～1050 ℃;
C. bent type: the T shape three-way shape blank after the hot pressing being heated to 950～1050 ℃, will be responsible for press-bending on the short radius elbow mould, make 90 ° of Y-type three way type shape blanks;
D. machining: remove each end surplus of Y-type three way type shape blank, and port is carried out beveling machine processing.
A. select base: the seamless steel pipe material: the 12Cr1MoV steel; Specification: Dn1000mm, wall thickness are 80mm
B. hot pressing:, on T shape threeway mould, be pressed into T shape three-way shape blank with blank heating to 1000～1100 ℃;
C. bent type: the T shape three-way shape blank after the hot pressing is heated to 1000～1100 ℃ again, on the short radius elbow mould, will be responsible for press-bending, be made for Y-type three way type shape blank;
D. machining: remove each end surplus of Y-type three way type shape blank, and port is carried out beveling machine processing.
A. select base: the seamless steel pipe material: the 0Cr18Ni9 steel; Specification: Dn300mm, wall thickness are 30mm;
B. hot pressing:, in T shape threeway mould, be pressed into T shape three-way shape blank with blank heating to 1000～1200 ℃;
C. bent type: the T shape three-way shape blank after the hot pressing is heated to 1100～1200 ℃ again, on the short radius elbow mould, will be responsible for press-bending, be made for Y-type three way type shape blank;
D. machining: remove each end surplus of Y-type three way type shape blank, and port is carried out beveling machine processing.
The finished product Y-type three way type also need carry out various corresponding checks such as mechanical property, metallographic.
Claims (10)
1. the preparation method of a Y shape hot-pressed three-way pipe fitting, it is characterized in that: it is undertaken by following operation:
A. select base: selecting diameter to be responsible for 1.15 times seamless steel pipe of intended diameter or to forge tube coupling greater than the threeway finished product is threeway blank (1);
B. hot pressing: threeway blank (1) is heated to the austenitic area, on press machine, is pressed into T shape three-way shape blank (2) with mould;
C. bent type: the T shape three-way shape blank (2) after the hot pressing is heated to the austenitic area again, on press machine, will be responsible for the position and bends, till the supreme bed die matched moulds, be made for Y-type three way type shape blank (3) with mould;
D. machining: remove each end surplus of Y-type three way type shape blank (3), and port is carried out the groove cutting to design size.
2. according to the preparation method of the described Y shape of claim 1 hot-pressed three-way pipe fitting, it is characterized in that: use the compacting of T shape threeway mould in the described hot pressing process, the length at its mold charge position (8) is 2.5～4 times of Y shape threeway finished product predominant tube diameter; Use the holed short radius elbow mould compacting of counterdie in the described bent type operation, its bed die (9) bottom is provided with the tap (10) that is complementary with the arm diameter, and the crooked short radius of its upper die tooling (11) is responsible for intended diameter numerical value with the threeway finished product and is equated.
3. according to the preparation method of the described Y shape of claim 2 hot-pressed three-way pipe fitting, it is characterized in that: blank heating temperature is 950～1200 ℃ in described hot pressing and the bent type operation.
4. according to the preparation method of the described Y shape of claim 3 hot-pressed three-way pipe fitting, it is characterized in that: each compacting amount of feed is 20～50 millimeters in the described hot pressing process, and heating and compacting hocket, till mould matched moulds up and down.
5. according to the preparation method of claim 1,2,3 or 4 described Y shape hot-pressed three-way pipe fittings, it is characterized in that: the material of described seamless steel pipe or hammer welded pipe is carbon steel, alloy steel or stainless steel.
6. the preparation method of a Y shape hot-pressed three-way pipe fitting, it is characterized in that: it is undertaken by following operation:
A. select base: selecting diameter to be responsible for 1.9 times seamless steel pipe of intended diameter or to forge tube coupling greater than the threeway finished product is threeway blank (1);
B. hot pressing: threeway blank (1) is heated to the austenitic area, on press machine, is pressed into T shape three-way shape blank (2) with mould;
C. bent type: the T shape three-way shape blank (2) after the hot pressing is heated to the austenitic area again, on press machine, will be responsible for the position and bends, till the supreme bed die matched moulds, be made for Y-type three way type shape blank (3) with mould;
D. machining: remove each end surplus of Y-type three way type shape blank (3), and port is carried out the groove cutting to design size.
7. according to the preparation method of the described Y shape of claim 6 hot-pressed three-way pipe fitting, it is characterized in that: use the compacting of T shape threeway mould in the described hot pressing process, the length at its mold charge position (8) is 2.5～4 times of Y shape threeway finished product predominant tube diameter; Use the holed short radius elbow mould compacting of counterdie in the described bent type operation, its bed die (9) bottom is provided with the tap (10) that is complementary with the arm diameter, and the crooked short radius of its upper die tooling (11) is responsible for intended diameter numerical value with the threeway finished product and is equated.
8. according to the preparation method of the described Y shape of claim 7 hot-pressed three-way pipe fitting, it is characterized in that: blank heating temperature is 950～1200 ℃ in described hot pressing and the bent type operation.
9. the preparation method of described according to Claim 8 Y shape hot-pressed three-way pipe fitting is characterized in that: each compacting amount of feed is 20～50 millimeters in the described hot pressing process, and heating and compacting hocket, till mould matched moulds up and down.
10. according to the preparation method of claim 6,7,8 or 9 described Y shape hot-pressed three-way pipe fittings, it is characterized in that: the material of described seamless steel pipe or hammer welded pipe is carbon steel, alloy steel or stainless steel.
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| CNB2006100125233A CN100445627C (en) | 2006-03-29 | 2006-03-29 | Preparation method of Y-shaped hot-pressed three-way pipe fitting |
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| CNB2006100125233A CN100445627C (en) | 2006-03-29 | 2006-03-29 | Preparation method of Y-shaped hot-pressed three-way pipe fitting |
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| CN100445627C true CN100445627C (en) | 2008-12-24 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102189144A (en) * | 2010-03-03 | 2011-09-21 | 李镇南 | One-shot forming mould of Y-type tee |
| CN101813225B (en) * | 2010-05-25 | 2011-06-15 | 西安建筑科技大学 | Low-resistance square pant tee joint |
| CN102909523B (en) * | 2011-08-01 | 2014-12-31 | 上海格尔汽车金属制品有限公司 | Method for machining Y-shaped pipe |
| CN102602691A (en) * | 2012-03-09 | 2012-07-25 | 上海艾能电力工程有限公司 | Y-shaped coal dropping pipe in power plant coal conveying system |
| CN104624916A (en) * | 2015-02-15 | 2015-05-20 | 王萍 | Manufacturing technique of S-shaped connector |
| CN108326075B (en) * | 2018-02-09 | 2019-09-24 | 岳阳筑盛阀门管道有限责任公司 | The cold forming process of nuclear power fast reactor pressure pipe threeway |
| CN113953360B (en) * | 2021-10-21 | 2023-11-28 | 河北海航管道制造有限公司 | Manufacturing process and die for cold extrusion steel seamless Y-shaped tee joint |
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| CN1058737A (en) * | 1990-08-05 | 1992-02-19 | 谭民悟 | The manufacture method of high-pressure three-way pipe joint |
| JP2000266428A (en) * | 1999-03-12 | 2000-09-29 | Mitsubishi Electric Corp | Three-way branch pipe and production thereof |
| CN1318439A (en) * | 2000-04-14 | 2001-10-24 | 阜新市压力容器管道公司 | Manufacture of Y-type seam-less T-joint |
-
2006
- 2006-03-29 CN CNB2006100125233A patent/CN100445627C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3452576A (en) * | 1966-11-21 | 1969-07-01 | Kelvinator Inc | Method of and device for fabricating y-fittings |
| CN85108775A (en) * | 1985-11-29 | 1987-06-10 | 四川省工业设备安装公司 | Manufacturing process of hot extruded seamless T pipe connection and shaped device thereof |
| CN1058737A (en) * | 1990-08-05 | 1992-02-19 | 谭民悟 | The manufacture method of high-pressure three-way pipe joint |
| JP2000266428A (en) * | 1999-03-12 | 2000-09-29 | Mitsubishi Electric Corp | Three-way branch pipe and production thereof |
| CN1318439A (en) * | 2000-04-14 | 2001-10-24 | 阜新市压力容器管道公司 | Manufacture of Y-type seam-less T-joint |
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| CN1828115A (en) | 2006-09-06 |
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