CN101115576A

CN101115576A - A hydroforming unit

Info

Publication number: CN101115576A
Application number: CNA2006800043903A
Authority: CN
Inventors: L·英瓦松
Original assignee: Ortic 3D AB
Current assignee: Ortic 3D AB
Priority date: 2005-02-08
Filing date: 2006-02-01
Publication date: 2008-01-30
Also published as: EP1850984A1; RU2007128579A; KR20070101349A; WO2006085812A1; SE528938C2; JP2008529798A; US20080121007A1; BRPI0607312A2; SE0500299L

Abstract

A hydroforming unit comprises a mould (19,20) that can be opened and sealing arrangements (30-33; 35-39) for sealing the ends of a tube-formed blank (16) placed in the mould,each one of the sealing arrangements (30-33; 35-39) comprises a ring (30, 35) with a thin wall that fits into the inner surface of the tube (16), and a plug (33, 36) that can be displaced in an axial direction mounted axially inside of the ring, and an arrangement (32,37) for initially drawing the plug (33, 36) outwards to put the ring under elastic tension against the inside of the tube-formed blank so that the plug and the ring together form a seal.

Description

Hydroforming unit

Technical field

The present invention relates to a kind of hydroforming unit, the water-tight equipment that it comprises the mould that can open and is used for sealing the end of the pipe shaping blank that is placed on mould.

Background technology

In static hydroforming, it is product that high pressure is used for the cold forming blank.Often use closed pipe shaping blank, they have the import that is used for pressure medium.When opening, the blank that pipe is shaped uses with the excusable water-tight equipment that is used for hermetic terminal, the power in the sealing of end of being applied to will be very big and water-tight equipment must be very heavy and clumsy.

Goal of the invention

The object of the present invention is to provide a kind of simplification water-tight equipment that in hydroforming unit, is used to manage the blank of shaping.

Summary of the invention

When each water-tight equipment comprises: have the circle of thin-walled, this circle is packed in the inner surface of pipe; Axially be installed in the inner plug that can be shifted in the axial direction of circle; At least one has taper shape in circle and the plug, makes when plug and circle are formed on the sealing of the inner self-locking of pipe together, obtains above-mentioned purpose.

Description of drawings

Fig. 1 schematically shows and from production line sidepiece according to the present invention.

Fig. 2 illustrates from top read fortune production line together.

Fig. 3 is illustrated in the amplification of the part shown in the earlier drawings.

The specific embodiment

Accompanying drawing illustrates the uncoiler 11 that is used for opening from coiled material 13 steel band 12.Guide this band by having the backing forming unit 14 of forming rolls 15, they schematically show.Continuously folding this band becomes pipe 16 in the backing forming unit, when pipe during by fixing welding unit, manages 16 longitudinal seam and is welded together by welding unit 17.As shown, this pipe can have circular cross section.The backing forming unit also is configured for the feed arrangement of steel band.

The hydroforming unit 18 that schematically shows is positioned at the welding unit back.This hydroforming unit has by two model parts---the mould that top 19 and bottom 20 constitute.This mould closure shown in Figure 1, and be placed on following bottom by as shown in arrow 21, and shown in arrow among Fig. 3 22, place superincumbent top, can open by machine force, mould part does not illustrate in Fig. 2, but indicates their interior shape.

When pipe 16 had been shaped, mould 19,20 stayed open, and the product 23 that is shaped in the feasible manufacturing cycle in front can be removed from mould, and pipe 16 is sent in the mould continuously when making simultaneously.

When the product 23 of hydroforming as shown in Figure 1 when mould 19,20 is removed, stop the manufacturing of pipe and by the cutter unit 24 cutting pipes 16 that comprise circular saw teeth cutter blade 25.When being cut off, this product 23 is taken away subsequently and is put on the output unit 26.When product 23 when mould is removed, as shown in Figure 1, this mould can be around pipe 16 closures, and can hydroforming at the pipe of mould inside.Product 23 before cutting away shown in Figure 1, and after shown in Figure 2 the cutting away.

Describe Hydroform process best with reference to Fig. 3, this Fig. 3 illustrates the close die 19,20 with up-to-date formed product 27.Circular cone steel ring 30 is positioned at the inlet side place of mould, and this mould is assembled together with pipe 16 inwall, and fixingly in the axial direction simultaneously has a certain amount of elasticity diametrically, and is rack-mount, this support with have pipe 31 homotypes of spoke 29.Steel ring 30 permissions pipe in the process of making pipe slides through in circle, and spoke 29 allows circle to expand.Bar 32 extends through pipe 31 and steel ring 30, and this bar is loaded with conical plug 33, and this conical plug 33 can be formed from steel.Provide as Fig. 1 is clear, support 34 is positioned at the place that pipe 16 does not also have welded closed, makes that this support can stay pipe 34 and bar 32.Thereby the backing forming unit has its final shaping position behind support, so that closure tube profile 16, although this final shaping position is not shown in the drawings.

Conical steel ring 35 and conical plug 36 also are positioned at the other end place of mould 19,20.Plug 36 is connected on the bar 37, and the service duct 38 that is used for pressure medium extends through bar and plug.As shown in Figure 2, plug 36 and steel ring 35 are supported by arm 39, and this arm 39 can rotate around axle I pivot.Arm 39 does not show in Fig. 1 and 3.Itself and the identical mode bracing ring 35 of pipe 31 bracing rings 30.Shown in Figure 2 by the equipment that object 35-39 forms, plug and steel ring pivot in the end of pipe 16 rotates.Be shown in dotted line the equipment 35-39 when pivot leaves, can be used as another conical plug 33 supply pressure media that pass through of replacement.

Be put under the pressure in order when pipe 16 is in the mould 19,20, to manage 16, by the outside pull lever of power unit, make plug 33,36 arrive initial position, they form sealing with circle 30,35 and their elastic dilatation circles are to initial position herein in this initial position, and they produce with pipe 16 and seal in this initial position.If it is useful that circle expansion forms sealing, this is because this minimum leaks and provide initial friction against pipe 16, but this imperative not.Pressure medium provides outside power by the pressure of passage 38 supplies and medium on plug 33,36, plug 33,36 acts on mutually with circle on expansible direction, makes them obtain the vertical force that increases on pipe 16, and this pipe 16 is radially supported against mould 19,20.Spoke 29 allows this expansion of circle 30, and encloses 35 expansions in an identical manner.Obtain the self-locking of end sealing in this mode, and needn't apply outside axial force in a large number so that obtain sealing.Thereby the equipment that is used for hermetic terminal is little, simple and cheap, and their simplify the structure of production line.The machine-operated arrangements that is used for control lever 32,34 is not shown.When pressure discharged and moves inward plug 33,36 by bar 32,37, circle 30,35 elastic shrinkage and unit 35-39 can outwards pivot to by position shown in dotted lines in Figure 1.Mould 19,20 can be opened now once more, and the backing forming unit can promote to manage 16 once more and enters in the mould and the product that promotes to be shaped comes out from mould.

Plug 33,36 and enclose 30,35 and all be depicted as taper shape.Has taper shape yet can or enclose fully or fill in, although preferred illustrated embodiment.

Oil and water slurry can be used as pressure medium in a conventional manner.

Will be understood that manufacturing process provides simple chance, be used for being rolled onto the full automation of removing perfect fluid statics ground formed product from untiing steel band.

Backing shaping and hydroforming all are set technology, and therefore are not described in detail.The backing forming tube needn't have circular cross section; It can have any cross section.Need be along its length constant cross-section, this pipe as long as existing backing forming unit can be shaped.

Claims

1. hydroforming unit comprises it is characterized in that the water-tight equipment (30-33,35-39) of the mould (19,20) that can open and the end that is used for sealing the pipe shaping blank (16) that is placed on mould,

Each water-tight equipment (30-33,35-39) comprising: have the circle (30,35) of thin-walled, it is contained in the inner surface of pipe (16); And axially be installed in the inner plug (33,36) that can be shifted in the axial direction of circle; At least one has taper shape in circle and the plug, makes plug and circle be formed on the sealing of the inner self-locking of pipe (16) together.

2. hydroforming unit as claimed in claim 1 is characterized in that, is used for initially being pulled outwardly the equipment (32,37) of (33,36) of drawing the cork, so that circle is placed under the elasticity tension against the inside of managing the shaping blank.