GB2193910A - Method of forming a tee-pipe - Google Patents

Method of forming a tee-pipe Download PDF

Info

Publication number
GB2193910A
GB2193910A GB08713894A GB8713894A GB2193910A GB 2193910 A GB2193910 A GB 2193910A GB 08713894 A GB08713894 A GB 08713894A GB 8713894 A GB8713894 A GB 8713894A GB 2193910 A GB2193910 A GB 2193910A
Authority
GB
United Kingdom
Prior art keywords
pipe
forming
tee
bulging portion
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08713894A
Other versions
GB8713894D0 (en
GB2193910B (en
Inventor
Yohsuke Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIHON BULGE KOGYO KK
Original Assignee
NIHON BULGE KOGYO KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NIHON BULGE KOGYO KK filed Critical NIHON BULGE KOGYO KK
Publication of GB8713894D0 publication Critical patent/GB8713894D0/en
Publication of GB2193910A publication Critical patent/GB2193910A/en
Application granted granted Critical
Publication of GB2193910B publication Critical patent/GB2193910B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/29—Making branched pieces, e.g. T-pieces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/02—Branch units, e.g. made in one piece, welded, riveted
    • F16L41/021—T- or cross-pieces

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Punching Or Piercing (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

Initially a bulging portion 2 is formed in a direction approximately orthogonal to the axis of a blank pipe by bulge working or other suitable methods, then the head of the bulging portion is opened e.g. by punching with any suitable means 5 and the bulging portion is formed into a branch pipe having a predetermined dimension by an expanding means 6 pressed in to the opening. If a punch 5 is used, it can have an integral expanding portion 6. <IMAGE>

Description

SPECIFICATION Method of forming tee pipe The present invention relates to a method of forming a tee-pipe, which, for example, may provide a branch path in a fluid pipe path.
Previously proposed tee-pipes have been manufactured mainly by means of bulge forming. In order to ensure the correct length of branch pipe constituting the branch path, a relatively long blank-pipe is preferred within which the bulging portion is formed by extrusion, and which is subsequently cut to size.
The employment of the forming method described above giving a large extruded amount causes the formation of wrinkles in the wall of the base pipe side so causing defective products and limiting the thinning of the wall thickness of the base pipe when a thin wall branch pipe is to be formed and the diameter difference between said branch pipe and the base pipe is large. Also, since a large extruded amount is needed as mentioned above, the inner diameter of the base pipe may be made too small to fall within the desired joint tolerances. In this case, the inner diameter of the base pipe must be worked at the ends thereof and the presence of the worked inner portions has presented problems in that liquid can collect in the pipe line and cause corrosion.
In order to solve the problems noted above, the present invention proposes a method of forming a tee-pipe comprising the steps of forming a bulging portion in the direction approximately orthogonal to the axis of a blank pipe by means of bulge working or other suitable methods, then opening the head of said bulging portion, and forming said bulging portion into a branch pipe having a predetermined dimension by an expanding means pressed into the opening. When carrying out the present invention, the step of openig the head can be performed by punching, drilling, the use of a lathe or the like. It is preferred that said expanding means is integral with the means for opening the head and further the opening process and the expanding process of the expanding means are carried out continuously in a metal mold for forming the bulging portion on the blank-pipe.
The objects and features of the invention will become apparent from the following detailed description taken in conjunction with the drawings which indicate an embodiment of the invention.
Figs. 1 and 2 are explanatory sectional side view showing the sequence of processes of the method according to one example of the present invention, respectively.
Referring to Fig. 1, a tee 3 with a head formed at a bulging portion 2 in the direction approximately orthogonal to the axis of a blank pipe 1 manufactured by means of bulge working or other methods is placed in a split metal mold 4 which may be longitudinally or laterally split (longitudinally split in the present case), and the top of said bulging portion is punched by a punch 5 mounted on a press (not shown). A tapered portion 6 constituting the expanding means formed connectively with said punch 5 is then pressed into the punched opening to expand the branch pipe and extend the branch of the tee-pipe as shown in Fig. 2.
Further, the tee-pipe 3 may, rather than being punched, be drilled by a drill or lathe working or other methods. The punching process and expanding process may also be carried out continuously in the metal mold, in which the bulge forming has been carried out, without using any separate metal mold 4 as described above.
Since, compared with prior proposals, the extruded amount can be reduced and the height of the branch pipe can be formed lower and then raised up to a predetermined height by the punch or the like in the process described above, the length of the blank-pipe may be shortened. At the same time, since the extrusion amount is small and thus the increase of wall thickness of the base pipe is less than that of previous methods without reducing the inner diameter of the blank-pipe, both ends of the blank pipe can be made within the desired tolerances without the need for inner diameter working thereof so obviating defects accompanying the inner diameter working. Furthermore, wrinkles are not produced so that thin wall thickness working can be carried out while tee-pipe having a large difference between the base pipe and the branch pipe can also be formed effectively.

Claims (5)

1. A method of forming a tee-pipe, comprising the steps of: forming a bulging portion in the direction approximately orthogonal to the axis of a blank pipe by bulge working or other suitable methods; opening the head of said bulging portion; and forming said bulging portion into a branch pipe having predetermined dimensions by use of an expanding means pressed into the opening.
2. A method of forming a tee-pipe as claimed in Claim 1, wherein said opening is effected by any of a punch, drill, lathe or the like.
3. A method of forming a tee-pipe as claimed in Claim 1 or Claim 2, wherein said expanding means is integral with the means opening the head.
4. A method as claimed in any one of the preceeding claims wherein said expanding process follows continuously from the opening process.
5. A method of forming a tee-pipe which is substantially as herein described with reference to the drawing.
5. A method of forming a tee-pipe as claimed in any preceding claim, wherein the opening process and the expanding process are carried out in a metal mold for forming the bulging portion on the blank pipe.
GB8713894A 1986-06-13 1987-06-15 Method of forming tee pipe Expired - Fee Related GB2193910B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61136120A JPS62292223A (en) 1986-06-13 1986-06-13 Forming method for headed tee

Publications (3)

Publication Number Publication Date
GB8713894D0 GB8713894D0 (en) 1987-07-22
GB2193910A true GB2193910A (en) 1988-02-24
GB2193910B GB2193910B (en) 1991-01-09

Family

ID=15167769

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8713894A Expired - Fee Related GB2193910B (en) 1986-06-13 1987-06-15 Method of forming tee pipe

Country Status (3)

Country Link
JP (1) JPS62292223A (en)
KR (1) KR920008567B1 (en)
GB (1) GB2193910B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2283931A (en) * 1993-11-18 1995-05-24 Daimler Benz Ag Method and device for manufacturing T-pieces
GB2304305A (en) * 1995-08-16 1997-03-19 Schaefer Maschbau Wilhelm Process and apparatus for producing hollow bodies having at least one branch
FR2771032A1 (en) * 1997-11-14 1999-05-21 Usui Kokusai Sangyo Kk PROCESS FOR MAKING A HOLE THROUGH THE WALL OF A METAL TUBE AND THUS OBTAINED TUBE
GB2339399A (en) * 1998-07-10 2000-01-26 Metallifacture Ltd Method of manufacturing a manifold and related improvements
WO2000048759A1 (en) * 1999-02-17 2000-08-24 Amcast Industrial Corporation Machine for forming t-shaped tubular components using a forming material insert
DE4343841C3 (en) * 1993-12-22 2000-09-14 Daimler Chrysler Ag Method of manufacturing an axle guide
CN101537437B (en) * 2009-04-22 2011-01-05 浙江飞挺管业有限公司 Special pressure relief device for manufacturing three-way pipe fittings by cold extrusion forming
WO2011003282A1 (en) * 2009-07-06 2011-01-13 上海昌强电站配件有限公司 Forging backward-extrusion process for making tee-pipe
CN107617673A (en) * 2017-08-23 2018-01-23 宁波金田铜管有限公司 A kind of machining apparatus of threeway red copper pipe fitting
CN112122533A (en) * 2020-09-16 2020-12-25 燕山大学 Square tee two-stage forming die and forming process

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0513628U (en) * 1991-02-19 1993-02-23 日本バルジ工業株式会社 Molding machine for headed teeth
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
CN114833247A (en) * 2021-02-02 2022-08-02 偃师东方管件有限公司 Production process of hydrogenation mixer tee joint
CN116423155B (en) * 2023-04-12 2023-11-17 优瑞朗实业有限公司 One-step forming process and device for three-way reducing main pipe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB470485A (en) * 1935-04-02 1937-08-13 Edward Shelton Cornell Jr Method of producing integral metal pipe fittings
GB1083354A (en) * 1963-12-21 1967-09-13 Agency Ind Science Techn A liquid pressure bulge forming apparatus and process
GB1092877A (en) * 1965-11-05 1967-11-29 Alfred Clay Arbogast Method and apparatus for making wrought y-fittings from a tubular work piece
GB1113673A (en) * 1965-03-22 1968-05-15 Bocama Process for the manufacture of bottom brackets for bicycles or like machines
GB1153797A (en) * 1966-11-21 1969-05-29 Roland James Latham A method of and means for making Stainless Steel and like Tubes and Fittings with Branches
GB1449912A (en) * 1973-02-06 1976-09-15 Skibild J B Tube tee element and a method of manufacturing the same
GB2174318A (en) * 1985-03-15 1986-11-05 Sumitomo Metal Ind Manufacturing branched metal pipes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4931675Y1 (en) * 1970-10-02 1974-08-27
JPS5665315U (en) * 1979-10-25 1981-06-01

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB470485A (en) * 1935-04-02 1937-08-13 Edward Shelton Cornell Jr Method of producing integral metal pipe fittings
GB1083354A (en) * 1963-12-21 1967-09-13 Agency Ind Science Techn A liquid pressure bulge forming apparatus and process
GB1113673A (en) * 1965-03-22 1968-05-15 Bocama Process for the manufacture of bottom brackets for bicycles or like machines
GB1092877A (en) * 1965-11-05 1967-11-29 Alfred Clay Arbogast Method and apparatus for making wrought y-fittings from a tubular work piece
GB1153797A (en) * 1966-11-21 1969-05-29 Roland James Latham A method of and means for making Stainless Steel and like Tubes and Fittings with Branches
GB1449912A (en) * 1973-02-06 1976-09-15 Skibild J B Tube tee element and a method of manufacturing the same
GB2174318A (en) * 1985-03-15 1986-11-05 Sumitomo Metal Ind Manufacturing branched metal pipes

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5697155A (en) * 1993-11-18 1997-12-16 Mercedes-Benz Ag Method of manufacturing a branched pipe by internal high-pressure forming
GB2283931B (en) * 1993-11-18 1997-01-08 Daimler Benz Ag Method and device for manufacturing T-pieces
GB2283931A (en) * 1993-11-18 1995-05-24 Daimler Benz Ag Method and device for manufacturing T-pieces
DE4343841C3 (en) * 1993-12-22 2000-09-14 Daimler Chrysler Ag Method of manufacturing an axle guide
US5765420A (en) * 1995-08-16 1998-06-16 Wilhelm Schaefer Maschinenbau Gmbh & Co. Process and apparatus for producing hollow bodies having at least one branch
GB2304305B (en) * 1995-08-16 1999-01-20 Schaefer Maschbau Wilhelm Process and apparatus for producing hollow bodies having at least one branch
GB2304305A (en) * 1995-08-16 1997-03-19 Schaefer Maschbau Wilhelm Process and apparatus for producing hollow bodies having at least one branch
FR2771032A1 (en) * 1997-11-14 1999-05-21 Usui Kokusai Sangyo Kk PROCESS FOR MAKING A HOLE THROUGH THE WALL OF A METAL TUBE AND THUS OBTAINED TUBE
GB2339399A (en) * 1998-07-10 2000-01-26 Metallifacture Ltd Method of manufacturing a manifold and related improvements
WO2000048759A1 (en) * 1999-02-17 2000-08-24 Amcast Industrial Corporation Machine for forming t-shaped tubular components using a forming material insert
CN101537437B (en) * 2009-04-22 2011-01-05 浙江飞挺管业有限公司 Special pressure relief device for manufacturing three-way pipe fittings by cold extrusion forming
WO2011003282A1 (en) * 2009-07-06 2011-01-13 上海昌强电站配件有限公司 Forging backward-extrusion process for making tee-pipe
CN107617673A (en) * 2017-08-23 2018-01-23 宁波金田铜管有限公司 A kind of machining apparatus of threeway red copper pipe fitting
CN112122533A (en) * 2020-09-16 2020-12-25 燕山大学 Square tee two-stage forming die and forming process
CN112122533B (en) * 2020-09-16 2021-09-10 燕山大学 Square tee two-stage forming die and forming process

Also Published As

Publication number Publication date
KR880000163A (en) 1988-03-23
GB8713894D0 (en) 1987-07-22
GB2193910B (en) 1991-01-09
KR920008567B1 (en) 1992-10-01
JPS62292223A (en) 1987-12-18

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee