GB2126510A - Tool for manufacture of shaped workpieces - Google Patents

Tool for manufacture of shaped workpieces Download PDF

Info

Publication number
GB2126510A
GB2126510A GB08224631A GB8224631A GB2126510A GB 2126510 A GB2126510 A GB 2126510A GB 08224631 A GB08224631 A GB 08224631A GB 8224631 A GB8224631 A GB 8224631A GB 2126510 A GB2126510 A GB 2126510A
Authority
GB
United Kingdom
Prior art keywords
tool
forming
plugs
forming medium
working space
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.)
Withdrawn
Application number
GB08224631A
Inventor
Jiri Kosek
Jiri Tomasek
Tomas Strasak
Jiri Drapela
Vaclav Penaz
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.)
VITKOVICE ZDARSKE STROJIRNY A
Original Assignee
VITKOVICE ZDARSKE STROJIRNY A
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 VITKOVICE ZDARSKE STROJIRNY A filed Critical VITKOVICE ZDARSKE STROJIRNY A
Priority to GB08224631A priority Critical patent/GB2126510A/en
Publication of GB2126510A publication Critical patent/GB2126510A/en
Withdrawn legal-status Critical Current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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/047—Mould construction

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The tool comprises an upper part (1) and a lower part (2), the lower part comprising: (a) a container (13) for a forming medium; (b) a working space (8) for the shaping of workpieces (15), the space being connected by at least one channel (9) with the container (13); (c) at least two guides (3) which are in communication with the working space (8) of the tool and which guide forming plugs (5) of the tool for shaping a workpiece (15) when positioned in the tool; (d) at least one guide (4) which is in communication with the working space (8) of the tool and which guides a braking plug (6) of the tool. <IMAGE>

Description

SPECIFICATION Tool for manufacture of shaped workpieces The present invention relates to a tool for the manufacture of shaped workpieces. More particularly, to a tool for the manufacture of shaped workpieces formed in an elastic medium.
In this technology a blank is subjected to hydraulic pressure by an elastic medium. The treatment causes plastic deformation. The hydraulic fluid is commonly known as a "forming medium".
Known tools are either placed into tubs filled with the forming medium or they are inserted into a closed operating space of an apparatus designed for this technology.
In many cases the working space of the tool has to be filled in specific manner, to produce the desired workpiece without, for example, leaving voids in the working space. However, in the regions of the working space where rounded parts of the shaped workpiece are formed, deterioration of the surface may still occur. Furthermore, if a forming operation is to be automated, difficulties arise in the removal of the product. There is also no provision, in known tools, for an automatic exchange and clamping of the tool.
According to the present invention there is provided a tool for shaping workpieces in an elastic forming medium, wherein the tool comprises an upper part and a lower part, the lower part comprising: (a) a container for a forming medium; (b) a working space for the shaping of workpieces, the shape being connected by at least one channel with the containers; (c) at least two guides which are in communication with the working space of the tool and which guide forming plugs of the tool for shaping a workpiece when positioned in the tool.
(d) at least one guide which is in communication with the working space of the tool and which guides a braking plug of the tool.
In order that the invention may be further understood an examplary embodiment of a tool according to the present invention is illustrated in the accompanying figure.
The tool comprises an upper part 1 and a lower part 2. Cylindrical guides 3, 4 are provided in the lower part 2 of the tool for forming plugs 5 and for braking plug 6.
These plugs 5, 6 are sealed by packings in grooves 7 in the lower part 2. The lower part 2 of the tool comprises: a container 13 filled with a forming medium, for example, oil or an emulsion and the working space 8. A channel 9 connects the container 13 with the working space 8. A discharge channel 10 may also lead from the working space 8, to the space 14 outside of the tool. A supply channel 1 1 and an outlet channel 12 for the forming medium communicates with the container 13.
The forming medium is supplied into the lower part 2 of the tool either in individual doses or continuously. The packings in grooves 7 prevent any leakage of the forming medium along the shaping plugs 5 in cylindrical guidings 3 and along the braking plug 6 in the cylindrical guicing 4.
The shaping proceeds as follows: The container in the lower part 2 of the tool is filled with the forming medium for example with oil or an emulsion.
A tubular blank 15 is of stiff material such as steel, copper or the like is inserted into the forming space 8 so that it is filled with the forming medium. The forming medium simultaneously lubricates the entire surface of the blank and deaerates its internal space. The upper part 1 of the tool is lowered on the lower part 2 and clamps the blank.
The forming plugs 5 bear on the lateral faces of the blank and secure the sealing of its internal space.
The working pressure of the forming medium is generated by the advance of the forming plugs 5. The blank is at this time secured between both the forming plugs 5 and the upper 1 and lower 2 tool parts.
The forming force generated by the advance of forming plugs 5 causes plastic deformation of the material in the forming space 8. The required braking force is generated in braking plug 6.
The end of the forming process is achieved when the braking plugs 5 come into a required position.
The lifting of the workpiece for its removal from the forming space is achieved by means of braking plugs 6, after decompression of the forming medium and raising of the upper part 1 of the tool.
In the course of the shaping process when the upper part 1 of the tool is in operation any excess forming medium is removed from the space where rounded parts of the workpiece are formed either via the channel 9 of the container or via the discharge channel 10.
The size of the channel 9 of the container or the size of the discharge channel 10 respectively are determined by the size of the tool, the size and subdivision of the workpiece and by the degree of heating of the forming medium in the course of the shaping operation. The outlet channel 12 serves to discharge forming medium from the lower part 2 of the tool and also for a possible exchange of the forming medium if this becomes necessary due to the thermal condition of the tool.
The working space of the tool is filled directly.
In some arrangements, both the channels 9 of the container and discharge channels 10 are provided, simultaneously.
1. A tool for shaping workpieces in an
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Tool for manufacture of shaped workpieces The present invention relates to a tool for the manufacture of shaped workpieces. More particularly, to a tool for the manufacture of shaped workpieces formed in an elastic medium. In this technology a blank is subjected to hydraulic pressure by an elastic medium. The treatment causes plastic deformation. The hydraulic fluid is commonly known as a "forming medium". Known tools are either placed into tubs filled with the forming medium or they are inserted into a closed operating space of an apparatus designed for this technology. In many cases the working space of the tool has to be filled in specific manner, to produce the desired workpiece without, for example, leaving voids in the working space. However, in the regions of the working space where rounded parts of the shaped workpiece are formed, deterioration of the surface may still occur. Furthermore, if a forming operation is to be automated, difficulties arise in the removal of the product. There is also no provision, in known tools, for an automatic exchange and clamping of the tool. According to the present invention there is provided a tool for shaping workpieces in an elastic forming medium, wherein the tool comprises an upper part and a lower part, the lower part comprising: (a) a container for a forming medium; (b) a working space for the shaping of workpieces, the shape being connected by at least one channel with the containers; (c) at least two guides which are in communication with the working space of the tool and which guide forming plugs of the tool for shaping a workpiece when positioned in the tool. (d) at least one guide which is in communication with the working space of the tool and which guides a braking plug of the tool. In order that the invention may be further understood an examplary embodiment of a tool according to the present invention is illustrated in the accompanying figure. The tool comprises an upper part 1 and a lower part 2. Cylindrical guides 3, 4 are provided in the lower part 2 of the tool for forming plugs 5 and for braking plug 6. These plugs 5, 6 are sealed by packings in grooves 7 in the lower part 2. The lower part 2 of the tool comprises: a container 13 filled with a forming medium, for example, oil or an emulsion and the working space 8. A channel 9 connects the container 13 with the working space 8. A discharge channel 10 may also lead from the working space 8, to the space 14 outside of the tool. A supply channel 1 1 and an outlet channel 12 for the forming medium communicates with the container 13. The forming medium is supplied into the lower part 2 of the tool either in individual doses or continuously. The packings in grooves 7 prevent any leakage of the forming medium along the shaping plugs 5 in cylindrical guidings 3 and along the braking plug 6 in the cylindrical guicing 4. The shaping proceeds as follows: The container in the lower part 2 of the tool is filled with the forming medium for example with oil or an emulsion. A tubular blank 15 is of stiff material such as steel, copper or the like is inserted into the forming space 8 so that it is filled with the forming medium. The forming medium simultaneously lubricates the entire surface of the blank and deaerates its internal space. The upper part 1 of the tool is lowered on the lower part 2 and clamps the blank. The forming plugs 5 bear on the lateral faces of the blank and secure the sealing of its internal space. The working pressure of the forming medium is generated by the advance of the forming plugs 5. The blank is at this time secured between both the forming plugs 5 and the upper 1 and lower 2 tool parts. The forming force generated by the advance of forming plugs 5 causes plastic deformation of the material in the forming space 8. The required braking force is generated in braking plug 6. The end of the forming process is achieved when the braking plugs 5 come into a required position. The lifting of the workpiece for its removal from the forming space is achieved by means of braking plugs 6, after decompression of the forming medium and raising of the upper part 1 of the tool. In the course of the shaping process when the upper part 1 of the tool is in operation any excess forming medium is removed from the space where rounded parts of the workpiece are formed either via the channel 9 of the container or via the discharge channel 10. The size of the channel 9 of the container or the size of the discharge channel 10 respectively are determined by the size of the tool, the size and subdivision of the workpiece and by the degree of heating of the forming medium in the course of the shaping operation. The outlet channel 12 serves to discharge forming medium from the lower part 2 of the tool and also for a possible exchange of the forming medium if this becomes necessary due to the thermal condition of the tool. The working space of the tool is filled directly. In some arrangements, both the channels 9 of the container and discharge channels 10 are provided, simultaneously. CLAIMS
1. A tool for shaping workpieces in an elastic forming medium, wherein the tool comprises an upper part and a lower part, the lower part comprising: (a) a container for a forming medium; (b) a working space for the shaping of workpieces, the space being connected by at least one channel with the container; (c) at least two guides which are in communication with the working space of the tool and which guide forming plugs of the tool for shaping a workpiece when positioned in the tool; (d) at least one guide which is in communication with the working space of the tool and which guides a braking plug of the tool.
2. A tool as claimed in claim 1 wherein the guides for the forming plugs and the guide or guides for the braking plug or plugs are cylindrical.
3. A tool as claimed in claim 1 or 2 wherein the guides for forming plugs and the guide or guides, for the braking plug, or plugs, are provided with grooves for packings.
4. A tool as claimed in claim 1, 2, or 3 wherein the working space of the tool is connected, by at least one discharge channel, to outside of the tool.
5. A tool as claimed in claim 1, 2, 3, or 4 wherein at least one supply channel and at least one outlet channel for the forming medium are provided in the lower part of the tool, the channels communicating with the container for the forming medium.
6. A tool as hereinbefore described with reference to the accompanying figure.
GB08224631A 1982-08-27 1982-08-27 Tool for manufacture of shaped workpieces Withdrawn GB2126510A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08224631A GB2126510A (en) 1982-08-27 1982-08-27 Tool for manufacture of shaped workpieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08224631A GB2126510A (en) 1982-08-27 1982-08-27 Tool for manufacture of shaped workpieces

Publications (1)

Publication Number Publication Date
GB2126510A true GB2126510A (en) 1984-03-28

Family

ID=10532561

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08224631A Withdrawn GB2126510A (en) 1982-08-27 1982-08-27 Tool for manufacture of shaped workpieces

Country Status (1)

Country Link
GB (1) GB2126510A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2679159A1 (en) * 1991-07-18 1993-01-22 Thiberge Louis Hydroforming method and device for implementing it
WO2005061145A1 (en) * 2003-12-09 2005-07-07 Daimlerchrysler Ag Device for internal high-pressure deformation of a blank
EP2272601A1 (en) * 2009-06-22 2011-01-12 Benteler Automobiltechnik GmbH Hydroforming method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2679159A1 (en) * 1991-07-18 1993-01-22 Thiberge Louis Hydroforming method and device for implementing it
WO2005061145A1 (en) * 2003-12-09 2005-07-07 Daimlerchrysler Ag Device for internal high-pressure deformation of a blank
EP2272601A1 (en) * 2009-06-22 2011-01-12 Benteler Automobiltechnik GmbH Hydroforming method

Similar Documents

Publication Publication Date Title
US4557128A (en) Apparatus for producing a bulge in thin metal material
US5679388A (en) Protected seal for blow down platen
US4195510A (en) Draw bead having alternating pressure surfaces and grooves
US5524466A (en) Method and apparatus for hydro-forming thin-walled workpieces
EP0237128A1 (en) A method of forming a ridge in a tube member
GB1153664A (en) Forming method and apparatus
US3919871A (en) Process and apparatus for producing a neck on a metal container having a closed bottom
GB2126510A (en) Tool for manufacture of shaped workpieces
JPH06285552A (en) Method and device for working press type pipe terminal
EP0092253B1 (en) Metal sheet forming process with hydraulic counterpressure
CA1190094A (en) Dual motion press
JPS58188511A (en) Extruding press for pipe blank
JP2002143938A (en) Method and apparatus for expanding and forming pipe body
PL169841B1 (en) Method of and apparatus for forming metal sheet workpieces using a fluid substrate
JPS5650744A (en) Closed forging method making use of double-acting press
SU831278A1 (en) Apparatus for hydrostatic extrusion of cavities in billets
SU848122A1 (en) Apparatus for pneumothermic forming
JPS58148027A (en) Drawing device
DE1479625B1 (en) Method and intermediate product for deep-drawing a flat or tubular intermediate product made from a fluorocarbon polymer
JP2539618B2 (en) Double-sided iron drawing machine
SU1344512A1 (en) Arrangement for reducing billets with hydrostatic pressure
JPS5945035A (en) Device for molding workpiece in elastic medium
SU919785A1 (en) Apparatus for forming sheet blanks by fluid pressure
SU1146121A1 (en) Die for extending hollow parts
JPS5647223A (en) Deep drawing method

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)