GB2029301A - A method of providing shoulders on a hollow body - Google Patents
A method of providing shoulders on a hollow body Download PDFInfo
- Publication number
- GB2029301A GB2029301A GB7922516A GB7922516A GB2029301A GB 2029301 A GB2029301 A GB 2029301A GB 7922516 A GB7922516 A GB 7922516A GB 7922516 A GB7922516 A GB 7922516A GB 2029301 A GB2029301 A GB 2029301A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shoulder
- flow
- hollow metal
- external
- mandrel
- 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
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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
-
- 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
- B21C37/16—Making tubes with varying diameter in longitudinal direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
- B21K21/08—Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A method of providing an internal shoulder (7) and an external shoulder on a rotationally symmetrical hollow metal body (6) employs a rotating flow-pressing mandrel (2), the external configuration of which corresponds to the internal configuration of a workpiece to be manufactured from the body (6). The body (6) starts as a pipe length mounted on a drive spindle (1) of a takes place by driving the body (6), mounted on the mandrel (2), into a sizing ball tool (5) fastened on a machine table of the flow-pressing machine. The internal shoulder is first formed by cooperation of the body with the mandrel, and the external shoulder is then rolled by adjusting the ball tool radially outwards. <IMAGE>
Description
SPECIFICATION
A method of providing shoulders on a hollow
body
The present invention relates to a method of providing an internal shoulder and an external shoulder on a hollow body.
Rotationally symmetrical hollow metal bodies with an internal and an external shoulder are required particularly as stroke tubes for multistage working cylinders. These shoulders guide the stroke tubes or pistons following at the inside or outside. Also, sealing elements can be arranged in the shoulders. It is known to manufacture hollow metal bodies of that kind from thick-walled pipe by metal-cutting. For this, a high material input
and a high cost effort is required for the cutting work. The shoulders can also be produced by different processes through heat-upsetting of pipes. It is common to all these methods that a high energy effort and relatively high metalcutting work is used. Flow-pressing methods are known, by which rotationally symmetrical hollow bodies are manufactured and a pipe piece cut to the appropriate length is used as initial blank.This hollow metal body is brought onto a smooth cylindrical flow-pressing mandrel and at one end bears against an entraining member applied at the end of the flow-pressing mandrel. The internal diameter of the hollow metal body corresponds to the external diameter of the flow-pressing mandrel. The deformation takes place thereby, that one drives against the hollow metal body rotating with the flow-pressing mandrel by means of a flow-pressing roller or a ball tool. The - entrainment of the hollow metal body on the fiowpressing mandrel takes place through the entraining member, against which the hollow metal body is pressed during the deformation.
Material flow takes place against the advance of the flow-pressing roller or the ball tool. Through displacement of the operating radius of the deforming tools during the flow-pressing operation, steps or shoulders can be attained at the external diameter of the hollow metal body.
The known flow-pressing operations have the disadvantage that an internal and an external shoulder can not be formed simultaneously.
According to the present invention, there is provided a method of providing an internal shoulder and an external shoulder on a rotationally symmetrical hollow body by a continuous flow pressing operation which comprises the step of simultaneously reducing the external diameter of the body and providing the internal shoulder and the succeeding step of providing the external shoulder.
An embodiment of the present invention will now be more particularly described by way of example and with reference to the accompanying drawings in which'.
Fig. 1 shows a setting of a hollow metal body, of an entraining member and of a ball tool relative to a flow-pressing mandrel before the start of a sizing operation,
Fig. 2 shows the setting of the hollow metal body, of the entraining member and of the ball tool relative to the flow-pressing mandrel after sizing the internal shoulder.
Fig. 3 shows the setting of the hollow metal body, of the entraining member and of the ball tool after sizing the external shoulder, and
Fig. 4 shows the setting of the hollow metal body, of the entraining member and of the ball tool after termination of the sizing operation.
Referring to the accompanying drawings, there
is shown a flow-pressing machine having a drive
support which is displaceable towards a machine
table 4.
A flow-pressing mandrel 2, the external
configuration of which corresponds to the internal
configuration of the hollow metal body to be
manufactured, is co-rotatingly mounted to a drive
spindle 1 of the drive support of the flow-pressing
machine. The flow-pressing mandrel 2 passes
through an entraining member 3 which rotates
synchronously therewith and which is arranged to
be axially displaceable on the flow-pressing
mandrel 2. A ball tool 5 is fastened in alignment
with the axis of the flow-pressing mandrel 2 on
the machine table 4 of the flow-pressing machine
and is displaceable in its working diameter. A pipe
piece cut to the required length us used as an
initial blank. The hollow metal body 6 is mounted
on the flow-pressing mandrel 2 and is disposed by
an end face against the entraining member 3.
During the subsequent descent of the work
support, the sizing of the inside shoulder 7 takes
place in that the hollow metal body 6 while
rotating is driven into the ball tool 5 which is set to the corresponding diameter. The radial
entrainment of the hollow mel;al body 6 on the flow-pressing mandrel 2 takes place through the
entraining member 3. During this flow-pressing
operation, a diameter reduction takes place at a
partial section of the hollow metal body 6 at the
internal as well as at the external diameter, while the internal configuration of the hollow metal body
6 corresponds to the external configuration of the flow-pressing mandrel with its step and an
internal shoulder 7 is thus produced on the hollow
metal body 6. The material in that case flows
against the working direction.When the hollow
metal body 6 has driven in up to the point at which the step of the inside shoulder 7 forms, withdrawal of the entraining member 3 from the
hollow metal body takes place and further entrainment of the hollow metal body 6 now takes place through the flow-pressing mandrel 2 at the step of the internal shoulder 7. Through further driving of the hollow metal body 6 into the ball tool 5, sizing takes place up to the point of the hollow metal body, at which the external shoulder 8 starts. The material in that case flows in the working direction. When the hollow metal body 6 has been driven in up to this point, the ball tool is reset to the envisaged external diameter of the external shoulder 8 and sizing of the external shoulder takes place through further driving-in.
The material in that case likewise flows in the working direction. The hollow metal body 6 is thereby finished and can be taken off from the flow-pressing mandrel 2.
It is an advantage of the above described embodiment that a high degree of utilization of the initial material with low energy consumption is attained. Also, the dimensional accuracy is so high that no or only very small material removal is necessary in a subsequent fine processing.
Claims (3)
1. A method of providing an internal shoulder and an external shoulder on a rotationally symmetrical hollow body by a continuous flow pressing operation which comprises the step of simultaneously reducing the external diameter of the body and providing the internal shoulder and the succeeding step of providing the external shoulder.
2. A method of providing an internal shoulder and an external shoulder on a rotationally symmetrical hollow body, substantially as hereinbefore described with reference to the accompanying drawings.
3. A stroke tube for a piston and cylinder arrangement when made by a method as claimed in either one of the preceding claims.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD20655278A DD137537B1 (en) | 1978-07-06 | 1978-07-06 | METHOD FOR PRODUCING A THICKKWELLED ROTATION SYMETRIC METALHOLE BODY |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2029301A true GB2029301A (en) | 1980-03-19 |
| GB2029301B GB2029301B (en) | 1982-06-30 |
Family
ID=5513487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7922516A Expired GB2029301B (en) | 1978-07-06 | 1979-06-28 | Method of providing shoulders on a hollow body |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5530392A (en) |
| DD (1) | DD137537B1 (en) |
| DE (1) | DE2922692A1 (en) |
| FR (1) | FR2430277A1 (en) |
| GB (1) | GB2029301B (en) |
| SU (1) | SU997910A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3019580A1 (en) * | 1979-05-22 | 1981-01-22 | Zaporozh Pk I T I | HYDRAULIC PRESS |
| CN102266888A (en) * | 2011-07-24 | 2011-12-07 | 哈尔滨工程大学 | Ball spinning forming fixture device and reverse ball spinning forming method thereof |
| CN106862353A (en) * | 2017-03-01 | 2017-06-20 | 北京中航昆吾科技有限公司 | For the vertical spinning equipment of processing thin-walled cylinder shape part |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2534159B1 (en) * | 1982-10-08 | 1986-05-16 | Piercy Jean | PROCESS FOR MANUFACTURING CYLINDRICAL PARTS, ESPECIALLY HOLLOW PARTS, AND MACHINE FOR IMPLEMENTING SAME |
| JPS6096278A (en) * | 1983-10-31 | 1985-05-29 | 株式会社平和 | Pinball machine |
| GB2191826B (en) * | 1986-06-20 | 1989-12-06 | Iracroft Ltd | Method of providing a face seal |
| CN102189167B (en) * | 2011-03-24 | 2013-02-06 | 哈尔滨工程大学 | Ball hot spinning forming device and method for nickel titanium shape memory alloy thin-walled pipe |
| RU2461436C1 (en) * | 2011-04-01 | 2012-09-20 | Федеральное Государственное унитарное предприятие "Государственное научно-производственное предприятие "Сплав" | Method of producing variable cross-section thin-wall shells |
| CN102274884B (en) * | 2011-05-26 | 2013-02-06 | 哈尔滨工程大学 | Double layer rolling ball spinning device with adjustable radial gap |
| CN103357731B (en) * | 2012-03-26 | 2015-07-08 | 广东龙丰精密铜管有限公司 | Internal-thread copper pipe forming and spinning device |
| CN110328251B (en) * | 2019-06-21 | 2020-09-01 | 武汉理工大学 | Near-net composite flow forming device and method for annular component with outer ribs |
-
1978
- 1978-07-06 DD DD20655278A patent/DD137537B1/en unknown
-
1979
- 1979-06-02 DE DE19792922692 patent/DE2922692A1/en not_active Withdrawn
- 1979-06-06 SU SU797770628A patent/SU997910A1/en active
- 1979-06-11 JP JP7345579A patent/JPS5530392A/en active Pending
- 1979-06-22 FR FR7916140A patent/FR2430277A1/en active Granted
- 1979-06-28 GB GB7922516A patent/GB2029301B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3019580A1 (en) * | 1979-05-22 | 1981-01-22 | Zaporozh Pk I T I | HYDRAULIC PRESS |
| CN102266888A (en) * | 2011-07-24 | 2011-12-07 | 哈尔滨工程大学 | Ball spinning forming fixture device and reverse ball spinning forming method thereof |
| CN106862353A (en) * | 2017-03-01 | 2017-06-20 | 北京中航昆吾科技有限公司 | For the vertical spinning equipment of processing thin-walled cylinder shape part |
| CN106862353B (en) * | 2017-03-01 | 2019-05-14 | 北京中航昆吾科技有限公司 | Vertical spinning equipment for processing thin-walled cylinder shape part |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2430277A1 (en) | 1980-02-01 |
| GB2029301B (en) | 1982-06-30 |
| DD137537B1 (en) | 1981-10-28 |
| JPS5530392A (en) | 1980-03-04 |
| DD137537A1 (en) | 1979-09-12 |
| FR2430277B3 (en) | 1982-05-28 |
| DE2922692A1 (en) | 1980-01-17 |
| SU997910A1 (en) | 1983-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |