CN1466499A

CN1466499A - Method and device for forming a flange or a rim on an end of a steel pipe

Info

Publication number: CN1466499A
Application number: CNA018162541A
Authority: CN
Inventors: ¡; 曼弗雷德·迈尼格
Original assignee: Metu- System Mainige & Co KG GmbH
Current assignee: Metu- System Mainige & Co KG GmbH
Priority date: 2000-09-25
Filing date: 2001-09-22
Publication date: 2004-01-07
Also published as: EP1320429A1; KR20030065482A; DE50103424D1; CZ297829B6; CZ2003853A3; JP2004508936A; PL200911B1; HUP0302953A2; RU2003112016A; EP1320429B1; US20040089043A1; PL359823A1; NO20031337D0; AU2002218191A1; DE10047310A1; ATE274381T1; BR0114106A; ES2225627T3; CA2424583A1; WO2002024369A1

Abstract

The invention relates to a method and device for forming a one-piece flange or rim (10,18) on the end of a steel pipe (12). The pipe is placed in a flat position on all sides on the inner surface thereof close to the end thereof and is clamped. One part of the pipe (10) protrudes above the clamped section of the tube (12). The protruding part of the pipe is bent by applying surface pressure against a peripheral section on the inner surface thereof, until a desired outward flectional angle is obtained. The desired flectional angle on all parts of the pipe (10, 18) or a part-section (10) thereof is gradually achieved by rotating the pipe (12) relative to the peripheral section wherein the flection occurs.

Description

Form the method and apparatus of flange or flange at the thin plate tube end

Technical field

The present invention relates to a kind of as claim 1 method as described in the preamble.

The invention particularly relates to the pipe of relative thin-walled, the diameter range of this pipe is about 100 to 3000mm, and wall thickness is 0.5 to 6.0mm.These pipes mainly ventilation, air-conditioning and air draft technology, but be also included within and be used for air hose, ventilation blower shell, device housings etc. in the processing technique field.

Background technology

Exist different methods of attachment, be used for each segment seal ground and interconnect securely.They have decisive influence to the economy and the technical characteristic of piping.Although directly, the flange that promptly is formed in integratedly on the tube end has conspicuous advantage, therefore and exist demand, but adopt processing separately, that be installed in tube end and be fixed on elbow on the tube end, flat or other moulding flange in a large number at present the flange and the flange of such shaping.Its reason is to lack a kind of method, and this method can particularly form the flange shape that meets the demands in the end of large volume pipe with acceptable expense.Can only form the ring flange that radially opens of less relatively stability or the plane face flange that radially opens at present, for bolt connects its boring.Plane face flange is mainly used in the ventilation blower shell.Simple flange can be processed on joggling machine and flanger by two rollers.The plane face flange of back boring is processed in pressing.With at a high speed rotation, this is only for very short body, just may realize as axial ventilation machine shell at this body.Tube end is inserted in the plane face flange bed die that will be formed.Then by an atwirl tube end of compression bar " roof pressure " that the roller of rolling arranged on its end until material yield distortion and leaning on bed die." roof pressure " method is similar to potter's clay and is shaped on the pottery capstan.This method also is used for forming the ring flange on the short tube ring, then will encircle flange and be inserted into tube end and be fixed on tube end.Back a kind of method has for example been described in DE196 32857 A1.

This known method is not suitable for directly forming flange at tube end, because make bigger pipe almost be impossible and also be dangerous with essential rotary speed rotation.Various shaping expenses for various different pipes also are too high for processing economically.Be impossible realize occurring under the recessed situation of side particularly, because no longer may cancel the flange shape after the shaping for the overcritical flange shape of processing, for example cone-shaped flange etc.

In order to process casing, framework, section bar or pipeline, known so-called bending method or fold method with straightedge.A flat sheet is clamped between fixing following guider and the mobile last guider and by means of the crooked guiding mechanism crimp of rotation for this reason.Be that whole sheet metal sections can lift or crimp with not extending when flanging in this biggest advantage.Just essential the flowing of formation seamed edge place sheet material.All other material remains unchanged fully.Therefore can not extend and not have special expenses ground accurately to realize the seamed edge section straightlyly and unstressedly.Therefore the saturating all material of pressing also is subjected to corresponding stress in above-mentioned " roof pressure " process in contrast.Also make the flanging energy consumption especially little thus.

Summary of the invention

The present invention attempts to propose a kind of method and a kind of device of carrying out this method, by they can expense economically not only on the short sections but also particularly also on the long tube section, realize the integrally formed of complicated flange and flange.

Realize that according to the feature of the present invention's purpose relevant by claim 1 purpose relevant with described device realizes by the feature of claim 5 with described method.

Dependent claims provides favourable expansion structure of the present invention.

Basis according to the inventive method is to make full use of the advantage of straight line fold method in the tube end bending.Therefore be known as the circumference fold method.

The straight line fold method can not be used for pipe certainly with changing, because must produce non-directional but crooked seamed edge and will not change the pipe that instrument ground processes different radii as far as possible for pipe.The present invention clamps, for example realizes this point by regulating wheel by the circle from tube end inside.This regulating wheel has the diameter that is slightly less than bore before tensioning.Expand regulating wheel after insertion, promptly diameter becomes big, until the excircle of regulating wheel compresses the inboard of tube wall.The device that this regulating wheel or other are used to clamp can be connected the firm driving shaft of pipe rotation with one.The reliable grip of tube end also is used to make simultaneously the pipe rotation, at this certain rotating speed that only need be more much lower than pressing.In any case will pipe inner with tensioning apparatus, for example regulating wheel between the enough frictions of appearance, make pipe overcome the resistance of flector thus and rotate.

On principle, also can make pipe and with it the device feature that is connected of antitorque commentaries on classics be in the parts that static and flector is connected with antitorque commentaries on classics with it and center on the tube axis rotation.

Then constantly during will being rotated, outstanding pipeline section is bent into flange or flange by the pipeline section of bending at pipe.This is preferably adopted rotating crooked clamp, these bending clamp in its home position or stop position lean in the tube end inboard.The axial width of clamp is larger than the tube end part that will be bent at least.Guarantee that thus the part that will be bent does as a wholely to be lifted and not change its straight shape.The face that leans of crooked clamp preferably will have and the inboard identical radius of pipe at tube end, so that make the tube end that will be bent partly have large-area supporting.But the cylindrical shape of crooked clamp bearing-surface also can have the radius that is slightly less than the pipe inboard on principle.Because rotating crooked clamp can only be distinguished the part zone of swan-neck circumference, pipe must be in equably in the middle of the rotation at leisure.When the pipe rotation, crooked clamp turn to desired angle of bend position at leisure.According to the fact this is called the circumference fold method according to method of the present invention.

Additionally can conform with the destination from the pipe outside and by a forming rolls or like the bending position of pipe be applied a pressure in favourable expansion structure of the present invention, wherein terminate in will be by on the tube end position of flange for the wedge angle of forming rolls cross section.Can quite accurately determine the shape (wedge angle or fillet) of bended edge thus.Determine the shape of cross section of forming rolls in addition by the maximum bend angle of shaped profile.Because in BENDING PROCESS forming rolls is applied tangible active force, the prerequisite that therefore realizes accurate bended edge is that the active force of forming rolls is fixed and supported.Forming rolls and its fixture connect into a fixing unit with crooked clamp and its drive unit same static and that do not rotate, fundamentally increase the stability of device thus.

Require not use forming rolls to carry out bending for relatively thin thickness of pipe wall when low at form accuracy for the flange of formed thereby or flange.The arching of tube wall exists enough supports to be used for bending in this case.But can not realize sharp-pointed bended edge, and along with the radius of the increase bended edge of thickness of slab becomes big at this.

Description of drawings

Describe in detail according to procedure of the present invention and according to the preferred embodiment of apparatus of the present invention below by accompanying drawing.In the accompanying drawing:

Fig. 1 to 12 is for illustrating job order according to the inventive method by means of being used in the job step that tube end forms the mutual linking of awl flange, and wherein the device feature that schematically illustrates with side view is only as the example of the processing effect that is used to this method of realization and can be with other building mortion replacement;

Figure 13 is the diagrammatic side view that is used to carry out according to first embodiment of device on first operating position of the inventive method;

Figure 14 is the side view corresponding to Figure 13 of device in second operating position;

Figure 15 is the side view corresponding to Figure 13 of device in the 3rd operating position;

The diagrammatic cross-section fragmentary of Figure 16 for cutting off along Figure 13 center line XVI-XVI;

Figure 17 is the schematic end view that is used for the regulating wheel of Figure 13 to 18 shown device;

Figure 18 is the diagrammatic side view of parts shown in Figure 17;

Figure 19 is the diagrammatic side view that comprises regulating wheel, pipe and its driving device component according to apparatus of the present invention;

Figure 20 is for to compare the side cross-sectional view of dwindling again in the part of building block shown in Figure 19 with Figure 19;

Figure 21 and 22 is axial section and the diagrammatic side view of another embodiment of regulating wheel;

Figure 23 and 24 is pipe, regulating wheel, crooked clamp and the forming rolls diagrammatic side view at the diverse location of crooked clamp;

Figure 25 to 29 for regulating wheel and crooked clamp at forming rolls or there is not the partial schematic side view of the differently curved position of forming rolls with varying cross-section;

Figure 30 and 31 is for having the signal oblique view of giving up in the part of the stop position of crooked clamp and bending position according to the each several part of device of the present invention of pipe, regulating wheel, forming rolls and crooked clamp;

Figure 32 is corresponding to the not pipe of Figure 30 and the local oblique view of forming rolls;

Figure 33 to 35 is the partial view that respectively has three differently curved clamp embodiment corresponding to Figure 32; And

Figure 36 has two diagrammatic side view according to the embodiment of apparatus of the present invention of working simultaneously at the pipe two ends.

The specific embodiment

Fig. 1 to 12 illustrates according to the course of work of the inventive method at a tube end with the signal partial view respectively.Fig. 1 illustrates one and casts out most partial section for clarity, this sectional view illustrate one not the running, at the tube end 10 of Fig. 1 middle finger to the circle cross-section pipe 12 on the right.Fig. 2 illustrates the state of tube end 10 after first procedure of processing.Tube end 10 becomes the pipeline section that will be bent, this pipeline section along the bended edge 14 of a rounding for example with respect to the axis direction 16 of pipe 12 about 150 ° outwardly-bent.Fig. 3 illustrates pipe 12 states the second circumference flanging process after, second pipeline section 18 that in this process, is close to first pipeline section 10 for example with respect to axis direction 16 with sharp seamed edge 20 outwardly-bent right angles.Therefore realize that an awl flange of being made up of the

pipeline section

10 and 18 that adjoins each other, this flange are formed on the pipe 12 integratedly.

Then Fig. 4 to 12 schematically illustrates a working method that is used to carry out according to the device of the inventive method.Parts identical or same type use identical Reference numeral in institute's drawings attached.

Fig. 4 illustrates and is in also not pipe 12 close regulating wheels 22 that are in the halted state of not expanding of tensioning state, and this regulating wheel is fixedly mounted in one is being on the drive shaft rotating 24 regulating wheel 22 under the power effect.Part illustrates in order to make first pipeline section 10 bend to the stop position of the first crooked clamp 26 before bending operation corresponding to 150 ° of positions shown in Figure 2 with giving up in Fig. 4.It is also noted that at this Fig. 1 to 3 compares 180 ° of upsets and becomes mirror image ground on the plane perpendicular to tube axis 28 with Fig. 4 to 12.The second crooked clamp 30 turn over 180 ° with respect to the first crooked clamp 26 around tube axis 28, illustrate with part equally to be positioned at its bending operation resting position before with giving up.The second crooked clamp 30 are used to make second pipeline section 18 to turn over 90 ° with respect to axis direction 16 to bend to corresponding to position shown in Figure 3.First forming rolls 32 shown in Figure 4 in addition and second forming rolls 34 lay respectively at its stop position that leaves pipe 12.First forming rolls 32 has the cross section of band rounding wedge angle 36, and its two sides 40 form 30 ° of angles.Second forming rolls 34 that turns over 180 ° around tube axis 28 leaves the stop position of pipe 12 at it, and this forming rolls has cross section and its side 42 that constitutes sharp rib 38 and forms a right angle.The shown device position component is corresponding to the original state of method.

Fig. 5 illustrates next duty, and regulating wheel 22 enters pipe 12 and enters into its expanded position from inwall tensioning tube 12 according to direction shown in the arrow 44 in this state.

Crooked clamp

26 and 30 enter tube end with regulating wheel 22, but two clamp are to make the rotation of tube end bending relevantly still be positioned at stop position with it.Same two forming rolls 32 and the 34 also the same stop positions that are positioned at state shown in Figure 4.Simultaneously driving shaft 24 rotates according to direction shown in the arrow 46, and regulating wheel 22 is rotated with pipe 12, and

crooked clamp

26 and 30 and forming

rolls

32 and 34 do not rotate around tube axis 28.Because regulating wheel 22 makes the frictional resistance of cylindrical outer surface 48 between pipe 12 inner surfaces of regulating wheel also rotate to making pipe 12 overcome big resistance greatly in the tensioning on its operating position shown in Figure 5.

Next job step of processing method is shown in Figure 6, moves to operating position that it reliably lean pipe 12 outsides according to direction shown in the arrow 50 along mobile axis 52 at this first forming rolls 32.

Then as shown in Figure 7, the first crooked clamp 26 according to direction shown in the arrow 54 by its stop position (Fig. 6) around perpendicular to shown in the axle of drawing turn over 150 ° of angles and forward its operating position (Fig. 7) to, make first pipeline section 10 that protrudes in regulating wheel 22 around first forming rolls 32 outwardly-bent 150 ° thus.Because driving shaft 24 and regulating wheel 22 rotate around tube axis 28 simultaneously with the pipe that is tensioned 12, therefore center on after a few at least around tube axis 28 with making pipeline section 10 no warpages and manage 12 rounding seamed edge 14 outwardly-bent 150 ° at these parts.Rotatable support by forming rolls 32 significantly reduces the frictional resistance with pipeline section 10 that produces at bending position.

Then as shown in Figure 8, first forming rolls 32 turns back to the stop position that it leaves pipe 12 by the operating position along mobile axis 52 again according to direction shown in the arrow 56, and the first crooked clamp 26 also rotate back into its stop position by its operating position according to direction shown in the arrow 58 simultaneously.

In next job step as shown in Figure 9, second forming rolls moves to the operating position that reliably leans pipe 12 outsides along mobile axis 60 according to direction shown in the arrow 62 from stop position.These processes are all at driving shaft 24, regulating wheel 22 with manage 12 and rotate and first crooked clamp 26, the second crooked clamp 30 and two forming

rolls

32 and 34 quiescent periods realize around tube axis 28.Therefore parts that rotate and static parts conform with the destination and are combined into a stable working cell separately.Certainly to guarantee each parts mobility from the stop position to the operating position respectively in the inside, working cell of not rotating.Certainly also to make on the other hand by driving shaft 24, regulating wheel 22 and manage 12 working cells of forming can be static and another working cell of being made up of crooked clamp and forming rolls can be around tube axis 28 rotations.

In next job step as shown in figure 10, the second crooked clamp 30 forward the operating position according to direction shown in the arrow 64 to by its stop position, make thus second pipeline section 18 that protrudes in regulating wheel 22 around 90 ° of cross sections of second forming rolls 34 corresponding to sharp bend seamed edge 20 outwardly-bent 90 °.When the

parts

24,22 and 12 of rotation turn at least a few around tube axis 28, then realize the outside whole bendings of second pipeline section 18 of pipe 12.

In next job step as shown in figure 11, second forming rolls 34 turns back to the stop position that it leaves pipe 12 along mobile axis 60 again according to direction shown in the arrow 66, and the second crooked clamp 30 rotate back into its stop position according to direction shown in the arrow 68.

Make the free pathway that turns back to initial position shown in Figure 4 for all parts whereby.Therefore as shown in figure 12 when end-of-job all parts be positioned at initial position shown in Figure 4 again, and be to form a flange by

pipeline section

10 and 18 in pipe 12 ends as result according to the inventive method.

The device preferred embodiment that it invents essential parts that has that is used to carry out according to the inventive method schematically is shown in Figure 13 to 16.For clarity by giving up a part in each parts, for example manage 12, regulating wheel 22, driving shaft 24 and crooked clamp 26.It is also noted that in addition crooked clamp 26 and a forming rolls 32 only are shown in the arrangement illustrated, and they are suitable for the single bending operation of an outstanding pipeline section 10.Certainly other crooked clamp and the forming rolls that is distributed in the drawing outside is set around tube axis 28.But its details can not described, because they work with the same way as the same with parts shown in Figure 13 to 16.If it is advantageous using the unit of being made up of crooked clamp and forming rolls that works alone for each bended edge, promptly needn't change instrument for each single job step.The working cell can be especially unimportant for using for series processing one by one inimically mutually.

Each comprises that the working cell of crooked clamp 26 and a forming rolls 32 is assembled to one respectively movably on the slide 70, and wherein a plurality of slides can be placed on the base plate 72 radiation.Can make each working cell adapt to the various diameters of the pipe of wanting processed easily by this method.Each slide 70 can move along drive 76 leading screws 78 that rotate by rotation according to direction shown in the double-head arrow 74 along two parallel slide rails 71.

The space is provided with two parallel side plates 80 (Figure 16) apart from ground on slide 70, and they are rigidly connected mutually by intermediate plate 82 frame-type ground.Wide, fan-shaped substantially fanning strip 84 extends leaning slidably between two side plates 80 on side plate 80 inboards, on fanning strip by bolt 86 stationary curved clamp 26.Fanning strip 84 is parallel to side plate 80 at it on by cross section shown in Figure 13 and forms an incomplete sector, and it lacks the interlude that is positioned at circular arc 88 opposites, because the bending operation of pipeline section 10 must be kept in the center of sector.The

straightway

90 and 92 that is connected on the circular arc 88 is positioned at beyond circular arc 88 central points.Crooked clamp 26 are fixed on the plane corresponding to the fanning strip 84 of a straightway 92 by bolt 86.

Be noted that different with Figure 13 to 15 illustrate for the required device feature of crooked clamp 26 rotations in Figure 16.

Realize by deflector roll 94 for rotate fanning strip 84 required guiding with crooked clamp 26, move in the circular arc guide groove 96 of this deflector roll on side plate 80.Deflector roll 94 protrudes in the both sides of fanning strip 84 and guiding in each guide groove 96.On fanning strip 84 cylindrical circumferential surface, be provided with the gear teeth 98 corresponding to fanning strip 84 cross section circular arcs 88, these gear teeth with drive 102 engagements of 100 travelling gears that driven by rotation.Therefore fanning strip 84 can forward the position corresponding to crooked clamp 26 operating positions shown in Figure 15 from the position corresponding to crooked clamp 26 stop positions shown in Figure 13 and 14 to.The angle of rotation of fanning strip 84 can freely be selected and on a large scale in the illustrated case corresponding to the angle between two sides of forming rolls 32 cross sections.

In addition as can be seen by Figure 13 to 15, forming rolls 32 is rotatably supported in the forked axle bearing 104 around its central axis 105, this bearing block itself can move to operating position shown in Figure 14 by it at the stop position shown in Figure 13 according to direction shown in the double-head arrow 50,56.For being moved, bearing block 104 is provided with a leading screw 106 that drives by drive motor 108.Importantly, bearing block reliably and is connected with the working cell of being made up of crooked clamp, forming rolls and slave unit with the operating position shown in 15 at Figure 14 with forming rolls with carrying big load.

In the duty shown in Figure 13 to 15, regulating wheel 22 enters tube end by moving pipe 12, and regulating wheel is positioned at the stop position of above-mentioned non-tensioning.Then regulating wheel 22 continues to expand also cylindrical ground tensioning tube 12 internally with described method in its operating position.Produce a pipeline section 10 that protrudes in regulating wheel 22 cylindrical outer surfaces at this, this pipeline section will be by following BENDING PROCESS bending.The working cell of being made up of the supporting and the drive unit of crooked clamp, forming rolls and subordinate before pipe 12 is shifted onto on the regulating wheel 22 is adjusted for static base plate 72 along the mobile phase of direction shown in the double-head arrow 74 like this by slide 70, makes it adapt to the various diameters of pipe 12.Such working cell only is shown in Figure 13 to 15.Other working cell can be installed on the base plate 72 by the most double glide guide rail 71 from the guiding of tube axis 28 radiation ground, makes them successively be used to manage 12, so that make each pipeline section form the part of a complicated flange.Be provided with a rotation at this for each slide 70 and drive 76, this rotation drive have leading screw 78, the thread slider 110 and a fixed body (Halter) 112 that is connected with slide 70 thus that on leading screw 78, move, wherein fixed body 112 can be mobile in the slit 114 of a base plate 72 that radially extends with respect to tube axis 28.

Describe structure and the working method of regulating wheel 22 first embodiment below in detail by means of Figure 17 to 20.Because the effect of regulating wheel 22 is to prevent to manage inboard different shape to change, it is important therefore its cylindrical circumferential surface 116 being leaned on tube wall as far as possible in large area.Therefore that regulating wheel preferred embodiment shown in is scattered in is a plurality of, be six fan-shaped section 118 in the embodiment shown, they are provided with axial transmission in the following mode that also will describe in detail by one and for example lean managing 12 inboards by tensioning ground from the stop position shown in Figure 17 and 18 left sides and be expanded in the operate outside position shown in Figure 17 and 18 right-hand parts in the end of expanding certainly of the pull bar 122 of hydraulic cylinder 124 forms.The quantity of fan-shaped section can be at random many.Have advantage in this more fan section, promptly the slit 126 between the fan-shaped section 118 that occurs when regulating wheel 22 expansions becomes less and does not have tube shape to change ground overlapping by the wall of pipe 12 institute, although tube wall is extremely thin.Fan-shaped section 118 for the circular arc sector and with the liftoff inner surface 128 that terminates in cylindrical cross-section of tube axis 28 spacers on.The radial width of fan-shaped section 118 can be selected arbitrarily, so that the diameter of regulating wheel 22 adapts to the various diameters of pipe 12.This suitability can realize by changing fan-shaped section 118 easily.The inner surface 128 of fan-shaped section 118 leans on the cylindrical outer surface 130 of circular arc claw 132.Fan-shaped section 118 is fixed on the claw 132 by radial bolts 142.Claw 132 has an inner face 134 that tilts with respect to tube axis 28, and this end face leans respectively on the side 136 of the expansion end 120 of pull bar 122.End 120 for the illustrated embodiment expansion has a hexagonal transverse cross section, so each side is corresponding to six claws, 132 each claw.

Heart boring thoroughly vertically in the main drive shaft 24 that is equipped with for regulating wheel and pipe 12 are rotated, and pull bar 122 is worn this hole thoroughly.Can make pull bar 112 move to expansion shown in Figure 19 first half or operating position 140 by control hydraulic cylinder 124 from the stop position 138 shown in Figure 19 Lower Half.Make thus fan-shaped section 118 by the stop position shown in Figure 17 and 18 left sides with the small spacing of pipe 12 inner surfaces adjust to shown in Figure 17 and 18 right-hand parts, leaning the operating position on pipe 12 inner surfaces under the pressure.This is adjusted by corresponding the moving of claw 132 and facilitates.

Driving shaft 24 is worn the indentations section 144 of whole device base plate 72 and rotatably support and rotate by a drive motor with hollow shaft decelerator 148 146 on the meaning that the professional was familiar with thoroughly.The other end of driving shaft 24 has a mushroom-shaped enlarged body 150 that has planar end surface 152, and the flat sliding surface 154 of claw 132 leans on planar end surface with radially sliding.The claw sliding surface 156 on sliding surface 154 opposites leans slidably on the planar interior surfaces of a positioning disk (Gegenscheibe) 158, and this positioning disk is fixed on the mushroom-shaped enlarged body 150 by bolt 160.Bolt 160 is worn the expanded hole 169 on the claw 132 thoroughly, and this expanded hole allows required small the moving radially of claw 132.

Bolt 160 is surrounded by spacer sleeve 162, and this spacer sleeve guarantees the straight line radially-directed of claw 132 with the hole 169 of claw 132.

Hydraulic cylinder 124 axially mountings that are used for control operating rod 122 are at hollow shaft decelerator (Hohlwellengetriebs) 148.Very big hydraulic cylinder 124 active force itself can be by expansion the inclined-plane of pull bar 120 ends 120 at random amplify again with respect to tube axis 28.Therefore produce required big tensile force, the friction that this tensile force produces 22 pairs of tube walls of enough regulating wheel connects, so that pipe overcomes the resistance of flector (crooked clamp 26 and forming rolls 32) and rotates.Certainly also can promptly when by another control depression bar work, in Figure 19, dwindle to the right conversely from the inclined-plane of the end of expanding 120.

Can realize that by unshowned spring claw 132 turns back to its stop position when unclamping regulating wheel 22 with simple method, spring is put into each claw the inside, perhaps also can pass through one around the unshowned continuous extension spring claw excircle, same, a unshowned groove the inside is put in this extension spring.

Also can select by sphere rotating disk 164 supporting driving shafts 24 for embodiment shown in Figure 20, the outside of sphere rotating disk (perhaps also can be inboard) be provided with the gear teeth 166.Driving machine 146 is arranged on the next door of sphere rotating disk 164 in this case.The pinion 168 of driving shaft 170 is with the gear teeth meshing of sphere rotating disk 164 and be responsible for driving driving shaft 24.The supporting form that can certainly adopt other, the professional was familiar with.

General shown in Figure 21 and 22 with the regulating wheels of 22 expressions and another advantageous embodiment of its driving.Hereto embodiment regulating wheel 22 have one that extend around circumference, by the tightening hoop 174 that an inclined slot 172 splits, this tightening hoop has cylindrical circumferential surface 116 and conical inner surface 176.The outer surface with same slope 178 of a tensioning plate 180 leans on conical inner surface 176, and this tensioning plate is fixed on the expansion end 186 of pull bar 122 by bolt 182 and nut 184.By on double-head arrow 188 directions between the tensioning operating position shown in the lax stop position shown in the Figure 21 and 22 first halves and Figure 21 and 22 Lower Halves mobile pull bar 122 can make tightening hoop 174 with arbitrarily big active force tensioning or lax.Tightening hoop 74 itself also can have one and be parallel to the slit that tube axis 28 is extended vertically.But producing the space on the tube wall of tensioning and on this position, making tube wall deformation thus in the crack that the slit that is obliquely installed 172 can prevent to open wide when tensioning.Resetting of tightening hoop realized automatically by the elastic reaction of tightening hoop 174 when lax in this case.This in case of necessity elastic reaction can by one groove the inside of tightening hoop 174 unshowned, around continuous extension spring strengthen.

Obviously, the wall thickness of pipe 12, desired flange shape or coversion material do not influence regulating wheel

22.Tube end

10,18 is shifted onto on the regulating wheel 22 by so respectively far awayly, uses until there are enough materials to be shaped for desired flange.

Crooked clamp 26 and forming rolls 32 shown in Figure 23 to 35 below comprise the advantageous embodiment of pipe 12 parts that will be deformed and regulating wheel 22 parts of having expanded.Figure 23 and 24 illustrates first embodiment of these parts, wherein moves to the outside of the forming rolls 32 roof pressure pipes 12 of operating position with said method.The crooked clamp 26 that rotate with said method lean at its stop position and are protruding in pipeline section regulating wheel 22, that will be bent 10 inboards, and wherein tube wall is clamped and be fixed between regulating wheel 22 and the forming rolls 32.The wedge angle 36 of forming rolls 32 cross sections terminates on the position that outstanding pipeline section 10 will be bent.Can determine the shape of the bended edge on the tube end by the shape of forming rolls 32.

Rotating crooked clamp 26 lean inboard at pipeline section 10 at its stop position as shown in figure 23.The axial width of crooked clamp should be slightly larger than the axial length of the pipeline section 10 that will be bent at least.Guarantee that thus the pipeline section that will be bent does as a wholely to be lifted and not change its rectilinear form.The cylindrical, top of crooked clamp 26 should have by face 190 and the inboard the same same radius of pipe on tube end equally, so that make the pipeline section 10 that will be bent have large-area supporting.

Because rotating crooked clamp 26 respectively can only the swan-neck circumference part zone, pipe 12 is rotated equably at leisure.When pipe 12 rotated, crooked clamp 26 also turned to desired angle of bend position (Figure 24) at leisure always.Crooked clamp 26 remain to pipe 12 around tube axis 28 last complete rotation circle of end always in this operating position, finish pipeline section 10 bendings thus.

For pipe 12 can be pulled out from regulating wheel 22 behind flange or flanging forming, forming rolls 32 must move to pipe with its bearing block 104 and leave stop position enough far away.Occur another working cell for next reversed bending process now, another angle of bend is adjusted to the function of said method in this working cell.

For regulating wheel 22 is successfully injected tube end 10, the insertion end of the cylindrical outer surface 48 of regulating wheel can have a taper chamfering 192.

Different embodiment in the forming rolls 32 that has elongated wedge angle 36 or right angle wedge angle 38 shown in Figure 25 to 28 or 34.Wedge angle 36 is used to make 150 ° of pipeline section 10 bendings, and wedge angle 38 is used to make 90 ° of pipeline section 10 bendings.

In Figure 29, schematically illustrate, have for the flange that is shaped or flange form accuracy and lowly how can need not forming rolls fully when requiring and only carry out bending by regulating wheel 22 and crooked clamp 26.

Figure 30 and 31 is illustrated in stop position (Figure 30) and operating position (Figure 31) has the almost half-cylindrical structure that leans the crooked clamp 26 of face 190.

Figure 32 illustrates with the ratio of amplifying slightly has the partial view of crooked clamp 26 that flattened cylindrical shape leans the another kind of form of face 190, and this leans face and only is fixed on the rotating fanning strip 84 shown in the part by bolt 86.Leaning face 190 leans on unshowned inside pipe wall with whole frictional force.Among some and Figure 32 shown in the accompanying drawing below similarly, but between face of leaning 190 and inside pipe wall, have the favourable expansion structure of the crooked clamp 26 of more friction.When the radius of clean-up of the face that leans 190 of crooked clamp 26 equals bore is optimal.But the radius that leans face 190 can not have significant deficiency ground less than the pipe inside radius yet.Can process the pipe diameter of multiple variation by same crooked clamp thus.On the main frictional position at the face of leaning 190 centers in order thoroughly to reduce friction and wear can be provided with a rolling bearing on crooked clamp 26 main bodys backing roll 194, its rotation 196 is parallel to that the face of leaning 190 extends and its circumferential surface 198 slightly protrudes in the face of leaning 190.The pipeline section 10 that is bent does not have on the circumferential surface 198 that frictionally is positioned at backing roll 194 at this position.

As shown in figure 34, can further improve crooked clamp 26 by the method identical by on the face of leaning 190, settling complete backing roll 194 chains with backing roll 194.In embodiment shown in Figure 34, in a chain, be provided with 5 such backing rolls 194.Between the backing roll 194 all the other lean face 190 parts and prevent to manage 12 walls and be absorbed between the backing roll 194, and this may cause forming ripple and elongation.

If constitute crooked clamp 26 by having the complete circle cylinder of cylindrical, top as shown in figure 35 by face 190, can realize minimum friction between crooked clamp 26 and pipe 12 inwalls, wherein whole cylindrical crooked clamp 26 are rotatably supported on the fanning strip 84 around rotating shaft 200.Although can realize minimum friction,, therefore must be received in the defective that tube wall forms ripple and brought when extending because in most of the cases can not provide enough spaces for the crooked clamp 26 of large diameter cylindrical structural.But these defectives are small for thicker pipe thickness, therefore can process by this " bending roll " at crooked clamp 26 places fully for the thickness of slab more than the 1.5mm.

Be used to carry out according to circumference fold method of the present invention selectively not only can the horizontal tube axis 28 of employing but also can adopt the vertical tube axis according to whole device of the present invention, wherein the former is preferred for straight tube and the latter is preferred for short tubulose drip molding.

For process rotatably at two ends straight tube with shaping

flange

10,18 one public, generally according to direction shown in the double-head arrow 206 two circumference crimping units according to above-mentioned form of the present invention are set movably along this system on the guide track systems with 202 expressions, make the regulating wheel that schematically illustrates 22 at two ends and ground, crooked clamp 26 opposites be provided with.Each device 204 can move on guide track system 202 by the driving leading screw 208 of self.

Can sail out of mutually in order to insert pipe 12 devices 204, until adapt to the pipe range of pipe 12 between the crooked clamp 22.Right latter two device 204 moves together, and regulating wheel 22 injects tube end up to a backstop, and this backstop is adjusted on the processing length of tube end.Two regulating wheels 22 then start the process of both sides simultaneously in the operating position tensioning.In order to take off pipe 12 each circumference crimping unit 204 is sailed out of mutually again.

10 76 142 12 78 144 14 80 146 16 82 148 18 84 150 20 86 152 22 88 154 24 90 156 26 92 158 28 94 160 30 96 162 32 98 164 34 100 166 36 102 168/169 / 38 104 170 40 105 172 42 106 174 44 108 176 46 110 178 48 112 180 50 114 182 52 116 184 54 118 186 56 120 188 58 122 190 60 124 192 62 126 194 64 128 196 66 130 198 68 132 200 70 134 202 71 136 204 72 138 206 74 140 208

Claims

1. be used on the thin plate tube end, forming the method for flange or flange, it is characterized in that, described pipe (12) near its end within it side all each leaned and tensioning to plane earth, one of them pipeline section protrude in by planar top by and the pipeline section of tensioning, at least an axial component should giving prominence to pipeline section outwards bends to desired angle by the plane roof pressure that applies with respect to the pipe internal surface circumferential segment with leaving tube axis always, and makes the part of whole pipeline section or pipeline section reach desired angle of bend by the relative rotation of the pipe circumferential segment crooked with respect to beginning.

2. the method for claim 1 is characterized in that, stops the bending in the pipe outside by the roof pressure that is applied to bending position from the pipe outside on a position of the crooked circumferential segment inside of beginning.

3. method as claimed in claim 2 is characterized in that, realizes being applied to roof pressure on the bending position with the small friction with respect to bending position on the pipe of rotation.

4. as one of above-mentioned claim described method, it is characterized in that, successively repeatedly carry out described method in order to form repeatedly crooked flange.

5. be used to carry out device as method as described in one of above-mentioned claim, it is characterized in that can be inserted the inner regulating wheel (22) of pipe (12), this tensioning is swung has cylindrical circumferential surface (48), this circumferential surface can and pipe (12) inner surface at interval fine pitch stop position and adjust between the expanded position that leans inner surface to rub sealedly, a driving shaft (24) that is connected with the antitorque commentaries on classics of regulating wheel (22), drive motor (146) that is used to overcome big resistance rotating driveshaft (24) and one lean the pipeline section (10 that will be bent, 18) pipeline section (10 that finishes corresponding to bending between stop position on the inner surface and the operating position, 18) rotating crooked clamp (26,30), these clamp have one to the columniform face (190) that leans of small part, be used to lean at described pipeline section (10,18) on, the wherein said body diameter that leans face is less than or equal to the diameter of the pipeline section (10,18) that will be bent and leans the length of the cylindrical height of face (190) greater than pipeline section.

6. device as claimed in claim 5, it is characterized in that, one and the pipe (12) interval pitch stop position and lean the pipeline section (10 that will be bent between the operating position of pipe (12) outer surface, 18) bended edge (14,20) forming rolls that can adjust on (32,34), they can be rotated to support on the bearing block (104), this bearing block with respect to tube axis (28) and the antitorque commentaries on classics of crooked clamp (26,30) fix.

7. as claim 5 or 6 described devices, it is characterized in that described regulating wheel (22) is made of a plurality of fan-shaped section (118), this fan-shaped section is by extension fixture (120,122,124) can between the stop position of regulating wheel (22) and expanded position, adjust.

8. device as claimed in claim 7, it is characterized in that, described extension fixture is made up of an expansion end (120) that is positioned on the pull bar (122), this end by tilt, with respect to the side (136) of tube axis (28) expansion with the coefficient claw of fan-shaped section (118) (132) inner end on concur, wherein said pull bar (122) is connected with a pull bar drive unit (124).

9. device as claimed in claim 8 is characterized in that, an elastic retraction means that is used for fan-shaped section (118) is turned back to from the operating position stop position.

10. as claim 5 or 6 described devices, it is characterized in that, tightening hoop (174) and the tensioning plate with conical external surface (180) that leans on the conical inner surface (176) of tightening hoop (174) that described regulating wheel (22) is cracked by an external cylindrical and interior conical are formed, and this tensioning plate is installed on the pull bar (122) with pull bar drive unit (124).

11. device as claimed in claim 10 is characterized in that, the slit (172) of described tightening hoop (174) favours tightening hoop longitudinal axis (28) and extends.

12. as the described device of one of claim 5 to 11, it is characterized in that, lean at the inherent one or more clamp of depression that described crooked clamp (26) lean face (190) on the position of face (190) and inject a backing roll (194), this backing roll is outstanding slightly and to be parallel to the face of leaning (190) cylinder axis around an axle (196) rotatably mounted from the face of leaning (190).

13. device as claimed in claim 12 is characterized in that, a plurality of parallel described backing roll (194) spaces are injected apart from ground in the depression of the face that leans (190) of described crooked clamp (26).

14. as the described device of one of claim 5 to 11, it is characterized in that, described crooked clamp (26) are made of the full cylinder bending roll, this bending roll is rotatably mounted around its rotating shaft of extending on cylinder axis (200), and the gantry post of its shaft can rotate between stop position and operating position with bending roll.

15. as the described device of one of claim 6 to 14, it is characterized in that, described forming rolls (32,34) on its circumference, has the wedge angle (36 of rounding or a sharp rib on cross section, 38), the contiguous flat side (40,42) of their transition, these flat sides constitute one by the definite mutually angle of desired flange (10,18) or flange angle of bend institute.

16. as the described device of one of claim 6 to 15, it is characterized in that, described rotating crooked clamp (26) and forming rolls (32) are merged into a stable working cell with the bearing and the transmission device of its subordinate, and this working cell can comprise that by pipe (12) and regulating wheel (22) construction unit that bearing and drive unit constitute rotates around tube axis (28) with respect to one.

17. device as claimed in claim 16 is characterized in that, a plurality of working cells (26,32) around the circle distribution of pipe (12), they are adapted to carry out special BENDING PROCESS respectively when constituting repeatedly crooked flange (10,18).

18. device as claimed in claim 17 is characterized in that, described working cell (26,32) are placed in respectively movably on the slide (70) for each diameter that adapts to pipe (12).

19. as the described device of one of claim 16 to 18, it is characterized in that, described each working cell (26,32) have two side plates (80), they are rigidly connected mutually by two intermediate plates (82) on opposed facing end, a wide fanning strip (84) extends between side plate (80), difference rotatably mounted a plurality of deflector rolls (94) on two sides of fanning strip sensing side plate (80), these deflector rolls move on the inboard of inherent each side plate of circular arc guide groove (94) (80), and the crooked clamp (26) of described fanning strip (84) supporting working cell.

20. device as claimed in claim 19, it is characterized in that, described fanning strip (84) on the cross section that is parallel to side plate (80), constitute one incomplete fan-shaped, it lacks the interlude on circular arc (88) opposite, wherein be connected the straightway (90 on the circular arc (88), 92) appear at the outside at circular arc (88) center, and on corresponding to the plane of the fanning strip (84) of a straightway (92) stationary curved clamp (26).

21. device as claimed in claim 20 is characterized in that, is provided with gear teeth (98) in the cylindrical plane corresponding to the fanning strip (84) of described circular arc (88), these gear teeth with drive travelling gear (102) engagement of (100) being handled by rotation.

22. as the described device of one of claim 5 to 21, it is characterized in that, two this devices (204) that are used for processing tube (12) two ends are bearing in a guide track system that extends along described tube axis (28) direction respectively movably, and towards the opposed facing two ends of pipe (12) with leave this ground, two ends and respectively be provided with a transmission device (208) that is used for mobile slave unit (204).