CN101693338B - Preparation method of reducing breeches tee joint - Google Patents
Preparation method of reducing breeches tee joint Download PDFInfo
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- CN101693338B CN101693338B CN2009101849804A CN200910184980A CN101693338B CN 101693338 B CN101693338 B CN 101693338B CN 2009101849804 A CN2009101849804 A CN 2009101849804A CN 200910184980 A CN200910184980 A CN 200910184980A CN 101693338 B CN101693338 B CN 101693338B
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Abstract
The invention relates to a preparation method of a reducing breeches tee joint. The method comprises the following technical steps: 1. selecting a seamless steel pipe as blank for manufacturing the tee joint; 2. using the blank to manufacture the blank like a reducing T joint shape by using a cold extrusion forming mould and adopting hydraulic inner expansion type cold extrusion on a pressure machine; 3. heating the blank like a reducing T joint shape manufactured by the step 2 to austenitic range, bending a main pipe part of the blank like a reducing T joint shape by using a bending forming mould on the pressure machine until an upper mould and a lower mould of the bending forming mould are mold-closing, and manufacturing the blank like a reducing T joint shape; and 4. removing margin at all end parts of the blank like a reducing T joint shape manufactured by the step 3, straightening the blank like a reducing T joint shape by using the forming mould on the pressure machine, carrying out end bevel machining of all ports to a designed dimension, and manufacturing the reducing breeches tee joint. The preparation method has low mould input expenses, simple technical process, and easy operation.
Description
(1) technical field
The present invention relates to a kind of pipe fitting preparation method,, belong to boiler pipe fitting processing technique field especially for the preparation method of the reducing breeches tee joint of discharge pressure liquid or gas.
(2) background technology
The reducing reducing breeches tee joint is the important pipe fitting that industry pipeline engineering such as electric power, metallurgy are used, and is generally used for discharge pressure liquid or gas etc.The reducing reducing breeches tee 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 performance, physicochemical property is had relatively high expectations.Can realize that for small-bore seamless T tube large-calibre seamless T shape three general rules are finished by forging machine processing or hot extrusion by cold extrusion.For the threeway of the seamless trousers shape of reducing, its geometry is than T shape threeway complexity, and difficulty of processing is bigger.Can adopt the method for cast form to some less demanding reducing breeches tee joint, but defectives such as the foundry goods interior tissue is loosened, is mingled with, pore make it be difficult to mechanical performance index and the welding difficulty that reaches higher.Also having a kind of method commonly used is to be responsible for earlier to be bent into return bend, leaves tap on bend pipe top then, and built-up welding becomes the arm profile on tap again, and machined arm inner and outer diameter reaches designing requirement.Long processing time, consume material, production cost is higher, and shaping three-way pipe internal channel is not smooth, and appearance forming and inherent quality change with workman's technical merit, therefore can not produce in batches.
(3) summary of the invention
The objective of the invention is to overcome above-mentioned prior art defective and provide that a kind of technology is simple, Mold Making easily, the preparation method of the reducing breeches tee joint that is easy to realize.
The technical solution adopted for the present invention to solve the technical problems is: a kind of preparation method of reducing breeches tee joint, and described method comprises following processing step:
Step 1, select base
Select seamless steel pipe for making the blank of threeway, the diameter of this seamless steel pipe is 1.1～1.3 times of reducing breeches tee joint finished product person in charge intended diameter, and wall thickness is 1.1～1.5 times that the reducing breeches tee joint finished product is responsible for design wall thickness;
Step 2, cold extrusion
Blank is adopted the cold extrusion of hydraulic pressure internal-expansion type with the cold-extrusion shaping mould on forcing press, make reducing T shape three-way shape blank;
Step 3, the bent type that heats
The reducing T shape three-way shape blank heating that step 2 is made arrives the austenitic area, on forcing press, bent in the person in charge position of this reducing T shape three-way shape blank with the bending forming mould, till the upper and lower mould matched moulds of bending forming mould, make reducing breeches tee joint shape blank;
Step 4, machined
Remove each end surplus of reducing breeches tee joint shape blank that step 3 is made, and on forcing press, put in order, and each port is carried out the groove machining to design size, make reducing breeches tee joint with finishing die is strong.
The preparation method of reducing breeches tee joint of the present invention, the cold-extrusion shaping mould that adopts in the described cold extrusion step comprises cold-extrusion shaping patrix and cold-extrusion shaping counterdie, the apposition position up and down of described cold-extrusion shaping patrix and cold-extrusion shaping counterdie is provided with a cold extrusion and is responsible for the hole, it is corresponding with the person in charge of described reducing breeches tee joint that the hole is responsible in this cold extrusion, the reducing breeches tee joint of described cold-extrusion shaping patrix and cold-extrusion shaping counterdie is responsible for position one side and is provided with the cold extrusion tap that the arm with reducing breeches tee joint is complementary, this cold extrusion tap is corresponding with the arm of described reducing breeches tee joint, 1.2～1.5 times of person in charge's bore dia that this cold extrusion tap diameter is a reducing breeches tee joint; The bending forming mould comprises the bending forming patrix in the bent type step of described heating, the bending forming counterdie, strong mould preparation and bending forming base under the bending forming, the bending radius of bending forming patrix designs bending radius for reducing breeches tee joint, the bending forming counterdie is arranged at the left and right sides of bending forming patrix, the bending forming counterdie is two pulleys that have the R groove, strong mould preparation is arranged at the below of bending forming counterdie under the bending forming, and strong mould preparation bottom is provided with the bending forming tap that the arm diameter with reducing breeches tee joint is complementary under the bending forming, and strong mould preparation all is installed on the bending forming base under described bending forming counterdie and the bending forming.
The preparation method of reducing breeches tee joint of the present invention, the interior bloated fluid pressure that adopts in the described cold extrusion step is 200MPa～400MPa; Heating-up temperature in the bent type step of described heating is 950 ℃～1200 ℃.
The invention has the beneficial effects as follows:
It is low that the inventive method drops into die cost, and technical process is simple, easy operating.Adopt the trousers shape threeway of this method processing, every performance indications such as apparent size, form and position tolerance, Non-Destructive Testing, physics and chemistry test all reach the relevant criterion requirement.The inventive method is applicable to makes Dn25mm～Dn50mm, the metallic conduit trousers shape threeway of diameter/wall thickness≤15.
(4) description of drawings
Fig. 1 is blank figure of the present invention.
Fig. 2 is reducing T shape three-way shape blank figure of the present invention.
Fig. 3 is reducing breeches tee joint shape blank figure of the present invention.
Fig. 4 is reducing breeches tee joint figure of the present invention.
The cold-extrusion shaping die face structural representation that Fig. 5 adopts for the present invention.
Fig. 6 is the side view of Fig. 5.
Fig. 7 is the A-A cut-away view of Fig. 5.
The bending forming mould Facad structure schematic diagram that Fig. 8 adopts for the present invention.
Fig. 9 is the vertical view of Fig. 8.
Description of drawings among the figure:
(5) specific embodiment
The preparation method of a kind of reducing breeches tee joint that the present invention relates to, described method comprises following processing step:
Step 1, select base
Select seamless steel pipe for making the blank 1 of threeway, the diameter of this seamless steel pipe is 1.1～1.3 times of reducing breeches tee joint finished product person in charge intended diameter, and wall thickness is 1.1～1.5 times that the reducing breeches tee joint finished product is responsible for design wall thickness; As Fig. 1;
Step 2, cold extrusion
(Fig. 5～Fig. 7) adopt the cold extrusion of hydraulic pressure internal-expansion type makes reducing T shape three-way shape blank 2, as Fig. 2 with the cold-extrusion shaping mould on forcing press with blank 1;
Step 3, the bent type that heats
The reducing T shape three-way shape blank 2 that step 2 is made is heated to the austenitic area, on forcing press with bending forming mould (as Fig. 8, Fig. 9) with as described in the person in charge position of reducing T shape three-way shape blank 2 bend, till the upper and lower mould matched moulds of bending forming mould, make reducing breeches tee joint shape blank 3, as Fig. 3;
Step 4, machined
Remove reducing breeches tee joint shape blank 3 each end surplus that step 3 is made, and strong whole with finishing die on forcing press, and each port is carried out groove machining (cutting, chamfering are shaped) to design size, make reducing breeches tee joint 4, as Fig. 4.
The cold-extrusion shaping mould that adopts in the described cold extrusion step comprises cold-extrusion shaping patrix 5 and cold-extrusion shaping counterdie 6, the apposition position up and down of described cold-extrusion shaping patrix 5 and cold-extrusion shaping counterdie 6 is provided with a cold extrusion and is responsible for hole 61, it is corresponding with the person in charge of described reducing breeches tee joint that hole 61 is responsible in this cold extrusion, position one side is responsible in the reducing T shape threeway of described cold-extrusion shaping patrix 5 and cold-extrusion shaping counterdie 6 the cold extrusion tap 62 that is complementary with arm, these cold extrusion tap 62 diameters are for 1.2～1.5 times of person in charge's bore dia, shown in Fig. 5～7;
The bending forming mould comprises bending forming patrix 7 in the bent type step of described heating, bending forming counterdie 8, strong mould preparation 9 and bending forming base 10 under the bending forming, the bending radius of bending forming patrix 7 designs bending radius for reducing breeches tee joint, bending forming counterdie 8 is arranged at the left and right sides of bending forming patrix, bending forming counterdie 8 is for having two pulleys of R groove, strong mould preparation 9 is arranged at the below of bending forming counterdie 8 under the bending forming, and strong mould preparation 9 bottoms are provided with the bending forming tap 91 that the arm diameter with reducing breeches tee joint is complementary under the bending forming, and strong mould preparation 9 is installed on the bending forming base 10 under described bending forming counterdie 8 and the bending forming.
The interior bloated fluid pressure that adopts in the described cold extrusion step is 200MPa～400MPa; Heating-up temperature in the bent type step of described heating is 950 ℃～1200 ℃.
Described seamless steel pipe material is carbon steel or steel alloy.
Claims (1)
1. the preparation method of a reducing breeches tee joint is characterized in that described method comprises following processing step:
Step 1, select base
Select seamless steel pipe for making the blank of threeway, the diameter of this seamless steel pipe is 1.1～1.3 times of reducing breeches tee joint finished product person in charge intended diameter, and wall thickness is 1.1～1.5 times that the reducing breeches tee joint finished product is responsible for design wall thickness;
Step 2, cold extrusion
Blank is adopted the cold extrusion of hydraulic pressure internal-expansion type with the cold-extrusion shaping mould on forcing press, make reducing T shape three-way shape blank;
Step 3, the bent type that heats
The reducing T shape three-way shape blank heating that step 2 is made arrives the austenitic area, on forcing press, bent in the person in charge position of this reducing T shape three-way shape blank with the bending forming mould, till the upper and lower mould matched moulds of bending forming mould, make reducing breeches tee joint shape blank;
Step 4, machined
Remove each end surplus of reducing breeches tee joint shape blank that step 3 is made, and on forcing press, put in order, and each port is carried out the groove machining to design size, make reducing breeches tee joint with finishing die is strong;
The cold-extrusion shaping mould that adopts in the described cold extrusion step comprises cold-extrusion shaping patrix (5) and cold-extrusion shaping counterdie (6), the apposition position up and down of described cold-extrusion shaping patrix (5) and cold-extrusion shaping counterdie (6) is provided with a cold extrusion and is responsible for hole (61), it is corresponding with the person in charge of described reducing breeches tee joint that hole (61) is responsible in this cold extrusion, the reducing T shape threeway of described cold-extrusion shaping patrix (5) and cold-extrusion shaping counterdie (6) is responsible for position one side and is provided with the cold extrusion tap (62) that the arm with reducing breeches tee joint is complementary, 1.2～1.5 times of person in charge's bore dia that this cold extrusion tap (62) diameter is a reducing breeches tee joint; The bending forming mould comprises bending forming patrix (7) in the bent type step of described heating, bending forming counterdie (8), strong mould preparation (9) and bending forming base (10) under the bending forming, the bending radius of bending forming patrix (7) designs bending radius for reducing breeches tee joint, bending forming counterdie (8) is arranged at the left and right sides of bending forming patrix, bending forming counterdie (8) is for having two pulleys of R groove, strong mould preparation (9) is arranged at the below of bending forming counterdie (8) under the bending forming, and strong mould preparation (9) bottom is provided with the bending forming tap (91) that the arm diameter with reducing breeches tee joint is complementary under the bending forming, and strong mould preparation (9) all is installed on the bending forming base (10) under described bending forming counterdie (8) and the bending forming;
The interior bloated fluid pressure that adopts in the described cold extrusion step is 200MPa～400MPa; Heating-up temperature in the bent type step of described heating is 950 ℃～1200 ℃;
Described seamless steel pipe material is carbon steel or steel alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101849804A CN101693338B (en) | 2009-10-26 | 2009-10-26 | Preparation method of reducing breeches tee joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101849804A CN101693338B (en) | 2009-10-26 | 2009-10-26 | Preparation method of reducing breeches tee joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101693338A CN101693338A (en) | 2010-04-14 |
| CN101693338B true CN101693338B (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101849804A Active CN101693338B (en) | 2009-10-26 | 2009-10-26 | Preparation method of reducing breeches tee joint |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218455B (en) * | 2010-04-15 | 2013-07-10 | 扬州红人实业有限公司 | Machining technology for Y-shaped three-way pipe |
| CN102267043B (en) * | 2011-07-28 | 2013-01-23 | 宝鸡市守善管件有限公司 | Method for manufacturing small-diameter titanium tee joint with outer diameter less than 168.3mm |
| CN102773307B (en) * | 2012-08-17 | 2014-04-02 | 河南光大管业有限公司 | Forming process of parallel three-way 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 |
| CN112122376B (en) * | 2020-09-11 | 2022-05-31 | 河北海航管道制造有限公司 | Cold extrusion process for manufacturing seamless oblique steel tee |
| 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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| CN101693338A (en) | 2010-04-14 |
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Address after: 214421 Jiangsu Province, Jiangyin City Industrial Park, No. 6 Hua Hua Town Patentee after: WUXI XIANGLONG ENVIRONMENT PROTECTION TECHNOLOGY CO., LTD. Address before: 214421 Jiangsu Province, Jiangyin City Industrial Park, No. 6 Hua Hua Town Patentee before: Jiangyin Hailu Metallurgy Equipment Co., Ltd. |