GB2057923A - Methods and apparatus for producing seamless branched parts from hollow members. - Google Patents
Methods and apparatus for producing seamless branched parts from hollow members. Download PDFInfo
- Publication number
- GB2057923A GB2057923A GB8028550A GB8028550A GB2057923A GB 2057923 A GB2057923 A GB 2057923A GB 8028550 A GB8028550 A GB 8028550A GB 8028550 A GB8028550 A GB 8028550A GB 2057923 A GB2057923 A GB 2057923A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spherical
- cup
- tool carrier
- hollow member
- branched part
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000011324 bead Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 3
- 239000000969 carrier Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The invention relates to the formation of seamless branched parts from cylindrical hollow members. Known methods cannot produce connections branching off at right angles to the axis of the tube axis. According to the invention, a spherical cup or annular head is first produced from the hollow member after which branches are formed from the cup or bead in a per se known manner. Apparatus according to the invention comprises a tool carrier (3) surrounded by a ring member (14), between which parts the cup or bead is formed. <IMAGE>
Description
SPECIFICATION
Methods and apparatus for producing seamless branched parts from hollow members.
The invention relates to a method and apparatus for producing highly stressed seamless branched parts from hollow members, particularly with large nominal widths.
It is known to produce branched parts from seamless hollow members by necking the wall, see German Patent Application No.
1 955278 and British Patent Specification No.
646812. it is also known to produce branches by upsetting the hollow member in a die; see German Patent Specification No.
307208. In these known methods, the branch connection is simply produced by necking the cylindrical tube wall and the length of the connection is dependent on the material displaced. These methods cannot however, produce connections branching off at right angles to the tube axis.
It has already been proposed to produce ball housings in a sealed grooved die by upsetting and rolling see German Patent No.
2828353.
The aim of the present invention is to provide a method of producing highly stressed seamless branched parts from hollow members, particularly with large nominal widths, in which one or more branches branching off at right angles or at angles other than right angles can be obtained reproducibly from cylindrical hollow object.
In the present invention it is possible to produce not only hollow members with a spherical central portion but also branched parts which can be mounted both at any desired points over the periphery of the spherical bead and also at various spacings over the length of the seamless hollow member. It is also possible to produce eccentric spherical regions.
One of the most important advantages of the method of the invention is that, owing to the branch connections formed from the spherically rolled annular bead, a substantially greater spacing from the external diameter of the hollow member is achieved than can be obtained directly by conventional necking of a hollow member.
A further advantage is due to the geometry of the zone of mingling of the ball casing and cylinder, it may be of high load-bearing capacity owing to the rotationally symmetrical construction. Moreover, the products made according to the invention can be suitable for use in the presence of dynamic stress from outside, e.g. in construction components for marine technology. Thanks to the length of the connections, machining and testing of the seam of the pipe welded on is made easier, particularly in high pressure apparatus.
In contrast to pipe connections which are produced mechanically, e.g. by milling, from forged preliminary workpieces, a workpiece produced by the method according to the invention has a natural grain flow. Considerably less energy is required in production than in the case of forged preliminary workpieces.
The invention will now be described by way of example and with reference to the accompanying drawings wherein:
Figure 1 is a front elevation, in partial section of apparatus according to the invention;
Figure 2 is a sectional side elevation from
Fig. 1;
Figure 3 is an alternative for the lower die,
Figure 4 shows the casing of a seamless heat exchanger with the branches offset by 180', Figure 5 shows a manifold with branches distributed over the length and circumference and at 90 to the main axis;
Figure 6 shows the housing for producing a mixed current, in a one-piece construction, with a curved portion produced in known manner;
Figures 7a and b show shaped parts for subsequent use in the manufacture of fittings;
Figure 8 shows a shaped part with eccentrically formed spherical portion; and
Figure 9 shows a branching element for an open framework.
As shown in Fig. 1, a tool carrier 3 and longitudinally movable support 4 with rollershaped abutments 5 and a lateral stand 6, which is also longitudinally movable, are arranged on a bed 1. Mounted in the free passage between the tool carriers 3 and the roller-shaped abutments 5 is a closed ring member 1 4 with inner profiling 7, the axis of which runs parallel to the axis of the tool carrier 3. The internal width of the ring member 1 4 is correspondingly greater than the external diameter of the hollow member 2 which is to be put in. An upper die 8 is movably mounted on the tool carrier 3. The longitudinally movable and fixable ring member 1 4 is held at the sides by backing rollers 9. The forming tools 14 and 8 are actuated by a drive 10.The bearing 1 3 for the tool carrier 3 which is opposite the drive end is hinged to enable the hollow member 2 to be inserted and removed. The workpiece 2 is supported by centering arms 11 which are adjustable in height.
Fig. 2 shows the arrangement for supporting and guiding the workpiece.
Fig. 3 shows an alternative solution to the ring member 14, in the form of a reciprocatable, profiled, planar lower die 1 2.
Figs. 4 to 9 show various branched parts which can be produced by the method according to the invention.
In order to produce a branched part using the process according to the invention, the hollow member 2 is placed in the apparatus, which has been moved out to the required distance, with the upper die 8 and ring member 14. The tools, which are moved radially towards each other, are set in rotation by the drive 10 and engage with each other so as to deform the workpiece in the grooved die 7 thus provided. The axial securing of the ring member 1 4 is obtained by means of the laterally mounted backing rollers 9.
Claims (9)
1. A method of producing a seamless branched part from a cylindrical hollow member comprising forming a spherical cup or a continuous spherical annular bead from the hollow member by pressing or rolling; forming one or more branches from the cup or annular bead in a manner known per se; and deforming the spherical cup or continuous bead to a shape other than spherical.
2. A method according to Claim 1 wherein the material of the member is distributed around the deformed regions to give varying wall thicknesses.
3. A method of producing a seamless branched part substantially as described herein with reference to and as illustrated by the accompanying drawings.
4. Apparatus for forming a spherical cup or annular bead from an initial cylindrical hollow member, for the production of highly stressed seamless branched parts by a method according to any preceding claim comprising a tool carrier and a longitudinally movable support therefor, mounted on a bed at least one end of which is supported on a hinged bracket; mounted on a bed a closed longitudinally movable ring member with inner profiles mounted to surround a tool carrier by the tool carrier, the axis of which ring member runs parallel to the axis of the tool carrier and the internal diameter of which is greater than the external diameter of a said hollow member, and the ring member being laterally secured by backing rollers; an upper die displaceably mounted on the tool carrier; and a drive for the tool carrier and the backing rollers.
5. Apparatus for forming a spherical cup or annular bead from an initial cylindrical hollow member substantially as described
herein with reference to and as illustrated by
Figs. 1 to 3 of the accompanying drawings.
6. Branched part produced by the method
according to any of Claims 1 to 3 wherein the
necked portion is formed from the spherical
bead or cup.
7. Branched part according to Claim 6, wherein the necked portion is formed at an angle other than a right angle to the longitudi
nal axis of the hollow member.
8. Branched part according to Claim 6, or
Claim 7 wherein a plurality of necked portions are distributed over the circumference or are
provided in the same plane.
9. Branched part according to any of
Claims 6 to 8 with a spherical form having an eccentricity 'e'.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2936736A DE2936736C2 (en) | 1979-09-07 | 1979-09-07 | Method of making highly stressed seamless junction pieces. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2057923A true GB2057923A (en) | 1981-04-08 |
| GB2057923B GB2057923B (en) | 1983-05-05 |
Family
ID=6080585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8028550A Expired GB2057923B (en) | 1979-09-07 | 1980-09-04 | Methods and apparatus for producing seamless branched parts from hollow members |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5639132A (en) |
| DE (1) | DE2936736C2 (en) |
| FR (1) | FR2468418A1 (en) |
| GB (1) | GB2057923B (en) |
| IT (1) | IT1132620B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE307208C (en) * | ||||
| FR459292A (en) * | 1913-06-16 | 1913-10-31 | Clayton Mark | Manufacturing process of pipe fittings |
| GB646812A (en) * | 1940-04-09 | 1950-11-29 | Tube Turns Inc | Improvements in or relating to the manufacture of metal pipe tees and the like |
| FR1033347A (en) * | 1951-03-02 | 1953-07-09 | Multiple tubings at the same level on a tube | |
| NL6412368A (en) * | 1963-10-30 | 1965-05-03 | ||
| DE1527825A1 (en) * | 1966-11-29 | 1970-01-08 | Maschf Augsburg Nuernberg Ag | Method for producing a ring piece |
| AT283086B (en) * | 1968-11-11 | 1970-07-27 | Walther Dr Leeb | Method and device for the production of T-shaped pipe sections |
-
1979
- 1979-09-07 DE DE2936736A patent/DE2936736C2/en not_active Expired
-
1980
- 1980-08-07 FR FR8017484A patent/FR2468418A1/en active Granted
- 1980-08-22 JP JP11576280A patent/JPS5639132A/en active Pending
- 1980-09-02 IT IT24414/80A patent/IT1132620B/en active
- 1980-09-04 GB GB8028550A patent/GB2057923B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2936736C2 (en) | 1982-03-18 |
| FR2468418B1 (en) | 1985-01-18 |
| FR2468418A1 (en) | 1981-05-08 |
| DE2936736A1 (en) | 1981-03-12 |
| IT1132620B (en) | 1986-07-02 |
| IT8024414A0 (en) | 1980-09-02 |
| JPS5639132A (en) | 1981-04-14 |
| GB2057923B (en) | 1983-05-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |