CN1326387A - Apparatus and method for forming pipe with increased wall-thickness at its end - Google Patents
Apparatus and method for forming pipe with increased wall-thickness at its end Download PDFInfo
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- CN1326387A CN1326387A CN99813407.4A CN99813407A CN1326387A CN 1326387 A CN1326387 A CN 1326387A CN 99813407 A CN99813407 A CN 99813407A CN 1326387 A CN1326387 A CN 1326387A
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- hole
- diameter
- pipe
- plug
- container
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- 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
- B21C25/00—Profiling tools for metal extruding
- B21C25/08—Dies or mandrels with section variable during extruding, e.g. for making tapered work; Controlling variation
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- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
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- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Forging (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Metal Extraction Processes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Apparatus for and method of extruding a metal pipe having a uniform inner diameter, and forward and rearward end sections (62, 66) which are thicker than the middle section (64) of the pipe. A metal billet (54) having a bore (56) is inserted into an open ended cylindrical bore of a stationary contain er (12). The billet (54) is moved axially within the bore of the container (12) by a press (13) which includes a pressing surface (38, 39) and a mandrel (44 ) extending forwardly from the pressing surface through the bore of toward the billet (54). The mandrel (44) has a cylindrical large diameter rearward portion (48), a cylindrical small diameter middle portion (50) and a forward ly and outwardly tapering forward portion (52). Metal from the billet (54) is forced through the small diameter bore of a two part removable first die (20 ) around the middle portion (50) of the mandrel (44) by moving the press forwardly for a first distance to form a preliminary forward end section (62 ) of pipe. The press is moved forwardly for a second distance for forcing meta l from the billet through the bore of the first die (51) around the rearward portion (48) of the mandrel for extruding the middle section (64) of pipe an d causing the preliminary forward end section (62) of pipe to pass over the tapered forwardportion (52) of the mandrel to form the forward end section (62) of pipe. The press is moved forwardly for a third distance for forcing metal from the billet through the relatively large bore of a second die (53) around the rearward portion (48) of the mandrel to form the rearward end section (66) of pipe.
Description
The present invention relates to the manufacturing of pipe, particularly be molded over the fluid delivery tube of commercial being called " both-end extra strong pipe ".This pipe has a forward end or " pin " shape end, behind the mid portion of a lengthening and one to end or " case " shape end.The internal diameter of three parts of all of this pipe is identical.The forward direction of pipe, back to the external diameter of end obviously greater than the external diameter of the mid portion of pipe.Therefore, the thickness of the mid portion of pipe obviously be thinner than pipe forward end or the back to the end.
The present invention relates to a kind of equipment that is used for that moulding is commercial and is known as the fluid delivery tube of " both-end extra strong pipe ".This pipe has a forward end or " pin " shape end, behind the mid portion of a lengthening and one to end or " case " shape end.The internal diameter of three parts of all of pipe is identical.The forward direction of pipe, back to the external diameter of end obviously greater than the external diameter of the mid portion of pipe.Therefore, the thickness of the mid portion of pipe be thinner than significantly pipe forward end or the back to the end.The forward direction of pipe, back process through machined and/or screw thread to the extra thickness of end, so that the forward end of first pipe or " pin " shape end can be connected to end or " case " shape end with the back of second pipe.
In the past, the both-end extra strong pipe of metal is by the mid portion of extruded tube respectively and end and forward direction, back is welded to the end on the opposite end of mid portion and makes.Because the weakness zone of potential pipe is being represented in the weld zone, thereby makes the each several part of pipe thicker than its common required thickness.This process is not only lost time but also very expensive.For realizing that the required extra material of extra thickness has also increased the material cost of pipe.The weight of the increase of pipe has also further increased the cost in the transportation and handling procedure.
Many metal extrusion equipment and methods that are used to utilize a press, mould and plug blank to be squeezed into pipe have been developed.Yet, do not have known being used to push as yet to have homogeneous internal diameter and two opposed end to have the equipment or the system of the integral tube of the external diameter bigger than the intermediate portion.These and other difficulty that is run in the pipe extrusion equipment of prior art or method is overcome by the present invention.
Therefore, main purpose of the present invention provides a kind of equipment that is used for metal stock is squeezed into pipe, a kind ofly has constant or the integrally formed pipe with less external diameter is compared in homogeneous internal diameter and intermediate portion with one of two opposed end in order to produce.
Further purpose of the present invention provides a kind of equipment that is used for as described above metal stock being squeezed at single continuous extrusion operation pipe.
Another object of the present invention provides and a kind of metal stock is squeezed into the method for pipe, and the external diameter that wherein said pipe has uniform internal diameter and intermediate portion is littler than the external diameter of two opposed ends of pipe.
A further object of the present invention provides a kind of method that as described above metal stock is squeezed into pipe in a single continuous process.
Another purpose of the present invention provides a kind of uneven plug of external configuration that is used in the metal extrusion press, and described metal extrusion press is used for metal stock is squeezed into a kind of external diameter pipe littler than the external diameter of two opposed ends with homogeneous internal diameter and intermediate portion.
Another object of the present invention provides a kind of equipment that is used for metal stock is squeezed into pipe, wherein the external diameter of the mid portion of pipe is littler than each the external diameter in two opposed ends of pipe, and the internal diameter of an end of pipe is littler than the internal diameter of the mid portion of pipe and opposed end.
Consider the purpose of these and other, those skilled in the art will be clear that, the present invention lies in the relative section of specification and by its accompanying claims and covers.
The present invention has substantially the equipment and the method for the metal tube of internal diameter uniformly about being used to squeeze out.The forward direction of described metal tube, back thicker than the mid portion of pipe to the end.Heating of metal blank with a cylindrical vertical hole is inserted in the after-opening of cylindrical hole of a fixed container.Movably split internal mold for one and be arranged in the hole of container and adjacent, and external mold is positioned at the outside of container and adjacent with the front end of container with the forward end of container.Internal mold has the less relatively cylindrical hole in footpath always.External mold has the relatively large cylindrical hole in footpath always.Blank by a press in the hole of container longitudinally central axis move, described press comprises forward direction pressed surface and plug that stretches to blank from this pressed surface forward of a circle.This plug has relatively large back to part of columniform diameter, the mid portion that columniform diameter is less relatively and edge direction forward the outward-dipping conical butt forward direction part of diameter from the diameter of centre part to the forward direction part.By making press move forward one first distance, force metal on the blank round the small diameter portion of plug hole, so that squeeze out the initial forward end of pipe by internal mold.Make this press move forward a second distance, after the major diameter of plug, pass the hole of internal mold to part to force the metal on the blank, so as the initial forward end that squeezes out the mid portion of pipe and make pipe through the inclination of plug to forward part.This makes the initial forward end of pipe laterally be expanded to the degree that internal diameter equals the internal diameter of mid portion along its longitudinal center's axis, and wall thickness is expanded to the degree greater than the wall thickness of the mid portion of pipe.Internal mold is pulled down from container, and make press move forward one the 3rd distance, in order to forcing metal back round plug from the blank, so that squeeze out the identical and wall thickness of the mid portion of internal diameter and pipe back greater than the pipe of the mid portion of pipe to the end to the hole of partly passing external mold.
Yet feature of the present invention can be by with reference to being understood the explanation of one of as shown in the drawing its version, among the figure best:
Fig. 1 is the longitudinal sectional view of main function components that is used to form the extrusion equipment of the present invention of both-end extra strong pipe;
Fig. 2 is the side view of the mandrel segment of described equipment;
Fig. 3 is the same end-view of splitting mould that forms the part of described equipment;
Fig. 4～12nd illustrates the view of the forming operation process of the forward end of pipe and mid portion;
Figure 13～18th, the view of the back forming operation process to the end that pipe is described;
Figure 19 a, 19b, 19c and 19d are vertical sectional view expression whole extrusion equipment of the present invention, that can link together along common line A-A, B-B and C-C; And
Figure 20 is a view similar with Figure 10, an improved plug of expression.
At first referring to Figure 19 a, 19b, 19c and 19d, pipe extrusion equipment of the present invention is denoted as 10 generally.Equipment 10 comprises after one to a support 72 and a forward direction support 70 that links to each other to support by four connecting rods 74 and back.Its press that totally is denoted as label 13 is installed on the pipe extrusion equipment 10, between support 70 and 72, so that longitudinally central axis 18 vertically moves.
Housing or container 12 are supported on the forward direction support 70.Housing 12 is fixed on the linking arm 80 of a pair of relative extruding.Linking arm 80 is fixed on the end that extends back 85 of a pair of piston that is totally marked by reference number 84.The forward end of piston 84 is slidably mounted in two hydrodynamic cylinder pressures 88, and this pair hydrodynamic cylinder pressure links to each other with the high pressure liquid potential source by underground 90.Hydraulic cylinder 88 is fixed on the forward direction support 70.Housing 12 accommodates a cylindrical tube or a sleeve pipe 14 with a circular hole 16, and circular hole 16 is coaxial with longitudinal axis 18.Hole 16 has the after-opening 15 of a circle and the open front 17 of a circle.Equally also be arranged in hole 16 referring to Fig. 1 and 3, one columniform internal molds 20, and adjacent with the open front 17 in hole.Internal mold 20 is laterally separated along line 20, forms two discerptible half module 20a and 20b.Totally the outer membrane module that is marked by label 23 is positioned at the outside of the open front 17 in hole 16.Outer membrane module 23 comprises a die holder 24, and this die holder has behind the hole 37, one to end 41 and a forward end 43.An external mold 26 is positioned at hole 37 at the back of die holder 24 to 41 places, end.A backup plate 30 is positioned at forward end 43 places of die holder 24.External mold 26 has a circular hole 28.Backup plate 30 has a circular hole 32.The slightly larger in diameter in hole 32 is 28 diameter in the hole.The diameter in the hole 22 of internal mold 20 is littler than the diameter in hole 28.
Pipe by extrusion equipment 10 moulding of the present invention is to be formed by a cylinder blank 54 with a columniform vertical hole 56.The size of blank 54 should make the gap that has a specified quantitative between the outer surface of blank is with respect to the inner surface of the sleeve pipe 14 of determining hole 16.The diameter in the hole 56 of blank 54 has a specific gap with respect to the part 48 of plug and 52 external diameter.The bar portion 36 of press 13 moves and all power forward of press 13 is applied on the blank 54 along axis 18.
Described the details of pipe former of the present invention, both-end extra strong pipe blank then is according to following explanation moulding.
Referring to Fig. 1, plug 44 is returned in the bar portion 36, so that can make blank 54 between the opening 15 of plug 44 and chamber 16.Then, blank 54 is packed in the hole 16 of container 12.In case blank 54 has been loaded in the hole 16, as shown in Figure 4, hydraulic cylinder 69 is activated, force driver 46 to travel forward with respect to crosshead 78 and bar portion 36.Thus, plug 44 is stretched out forward with respect to bar portion 36 ground by driver 46, thereby the back of plug is arranged in the forward end place of bar portion 36 and in the hole 42 of modular ring 38 to part 48.This moment, plug 44 is remained on the fixed position with respect to ring 38 ground.Activate hydraulic cylinder 77, make comprise crosshead 78, bar portion 36, plug 44 and modular ring 38 interior press 13 as an individual unit travel forward.As shown in Figure 5, press 13 longitudinally axis 18 travels forward, thereby plug 44 extends through the hole 56 of blank 54, passes the hole 22 of internal mold 20, passes the hole 28 of external mold 26 and passes the hole 32 of backup plate 30.As shown in Figure 5, bar portion 36 also enters in the hole 16.As shown in Figure 5, modular ring 38 is being about to be resisted against the back on the end of blank 54 before blank applies forward pressure.
A preferred variation of described first step is, activates hydraulic cylinder 69 and passes the hole 56 of blank 54 to promote plug 44, meanwhile blank is supported on the movable carriage.Activate hydraulic cylinder 77, make press 13 towards container 12 motions, thereby plug 44 and blank 54 are brought in the hole 16 of container, be in position shown in Figure 5.
Blank is pressed in the back on the end of internal mold 20 by additional the travelling forward of press 13.A little extrusion billet 54 that travels forward of press 13, and force the metal on the blank to be filled in the inner surface of sleeve pipe 14 and the space between the blank fully.Metal at the forward end place of blank 54 also is forced to upcountry to shift to the part 48 that the diameter of plug 44 reduces as illustrated in fig. 6, thereby forms protruding or " reinforcement " 60 of an inside drum of material.This moment, the power forward of bar portion 36 is being pushed blank 54.Blank thereby on length, reduce slightly, and the corresponding volume of blank is transferred in the gap between sleeve pipe 14 and the blank 54 and in the gap between plug and the blank, to form " reinforcement " 60.As shown in Figure 7, the mid portion 50 that reduces at the diameter of plug and the back crossover sites between part 48 of plug are determined the initial forward end of pipe or the length of " pin " shape portion 62 with respect to internal mold 20.
As shown in Figure 7, carry out continuously extruded by making bar portion 36 travel forward one first distance to blank 54, with force metal on the blank between the mid portion 50 that the diameter at the inner surface of internal mold 20 and plug reduces first annular opening or gap 51 pass through, form the cylindrical initial forward end 62 of pipe.Initial forward end 62 will finally become " pin " the shape end or the forward end of pipe.By making press 13 second distance that travels forward mold the mid portion 64 and the forward direction part 67 of pipe.At the moment, the cylindrical major diameter rear portion 48 of plug arrives the back to part of internal mold 20.Back when part 48 enters the hole 22 of internal mold 20 when plug as shown in Figure 8, forms one second annular opening 53 at the inner surface of internal mold 20 and plug back between part 50.The internal diameter of second annular opening 53 is bigger than the internal diameter of first opening 51.This means that also second annular opening, 53 to the first annular openings 51 are narrow.Therefore, force metal from blank 54 by opening or gap 53, become one and have the tubular extrusion part thick than thin-walled by the pressure forward of bar portion 36.So just, the cylindrical midsection that has begun pipe is divided 64 moulding.Simultaneously, as shown in Figure 8, the initial forward end 62 of pipe arrives the taper forward direction part 52 of plug, and beginning is with respect to axis 18 lateral magnifications.Because the cross section of blank 54 is much larger than the cross section of production tube, the extruding pipe fitting is than the long several times of blank.The length of extruding pipe fitting is determined by the ratio (or extrusion ratio) of the cross-sectional area of the cross-sectional area of blank and pipe.For example, for 12: 1 extrusion ratio, press 13 whenever advanced one inch, with the extruding pipe fitting that molds 12 inches.Because plug is maintained fixed with respect to housing or bar portion 36, so this elongation when extruding is slided the extruding pipe fitting on the external diameter of plug 44.
Fig. 9 represents when forcing blank to cross the taper forward end 52 of plug 44 blank 54 further to be squeezed, and the mid portion 64 of pipe is elongated, and the initial forward end 62 of pipe enlarges continuously.
Figure 10 and 11 expressions are used for the finishing of extrusion process of the forward end of pipe.When front end by the taper forward direction part 52 of plug of the front end of the initial forward end 62 of pipe, it becomes cylindrical, as shown in figure 10.Simultaneously, the internal diameter of the forward end 62 of expansion is identical with the internal diameter of mid portion 64.The initial forward end 62 of pipe is fully expanded in Figure 11, thereby finishes the forward end of pipe or the moulding of " pin " shape end, and this is marked by reference number 56.
As shown in figure 12, when bar portion 36 moved on, the length of the mid portion 64 of pipe extended gradually, when the Len req of extruding pipe till.After the mid portion 64 that molds pipe, hydraulic cylinder 77 is quit work, and activate hydraulic cylinder 81 and 85 simultaneously, so that carriage release lever portion 36 and container 12 backward.The pipe fitting that blank 54 and part are extruded also moves backward with container 12, as shown in figure 13.This has produced a little gap between container 12 and die holder 24, and has eliminated the pressure forward on the mould bases 98.Then, activate hydraulic cylinder 110,100 remove valve 104 from the chamber, and dismountable mould bases 98 is moved forward, so that produce a gap 57 between die holder 24 and container 12, as shown in figure 14.Gap 57 is wideer than internal mold 20.Hydraulic cylinder 81 is quit work, and activate hydraulic cylinder 77 once more, so that move forward bar portion 36.This forces internal mold to shift out container 12 forward and enters space 57, as shown in figure 15.When internal mold 20 left the open front 17 in hole 16, two half modules of internal mold 20 separated and leave the mid portion 64 of pipe, as shown in figure 16.Housing 98 moves backward and bar portion 36 and container 12 move forward to the after-opening 103 of chamber 100, thereby the front surface of die holder 24 and container 12 leans, as shown in figure 17.Hydraulic cylinder 110 is activated, so that make valve 104 in the front of mould bases 98 return chamber 100.
The remainder of blank 54 is used to form the back to part or " case " shape part of pipe.
Activate hydraulic cylinder 77, so that make press 13 and bar portion 36 move forward one the 3rd distance.One the 3rd annular opening or gap 55 are determined in back space between the inner surface in part 48 and hole 28 at plug.Press 13 moves forward one the 3rd distance forces metal to pass the 3rd annular opening or gap 55 from blank 54.The hole 28 of external mold 26 has the diameter bigger than the hole 22 of internal mold 20, thereby the thickness in annular opening or gap 55 is greater than the thickness in second annular opening or gap 53.Therefore, form the thicker relatively back of pipe from the metal that is forced through the 3rd opening 55 of blank 54 to end 66, as shown in figure 18.The back to the external diameter of end 66 obviously greater than the external diameter of the mid portion 64 of pipe.This moment, the extruding of pipe is finished.After the whole Len req of extruding pipe, blank is residual a little not crimping section.This not crimping section mark by the reference number among Figure 18 68.By primer fluid cylinder pressure 69 with plug is shifted out backward the extruding pipe fitting and by primer fluid cylinder pressure 88 with mobile containers 12 backward, can be in extruder not crimping section 68 remove from pipe.Moving backward of container 12 released the not crimping section 68 of blank to outside the hole 16, and under the end saw of pipe.Preferably, make to comprise that the extruding pipe fitting of crimping section 68 does not move a very short distance backward, be beneficial to remove not crimping section 68.By primer fluid cylinder pressure 110 valve 104 is moved on its off-position outside the chamber 100 and will push pipe fitting and remove.Making mould bases 98 pass open front 99 ground 100 removes from the chamber.This makes extruding pipe fitting can be from the chamber 100 be removed by open front 99.Can for example adopt shear, means that any hope such as saw, grinding, flame cutting, laser cutting is adopted not crimping section 68 remove from the rear end of extruding pipe fitting.Then, from chamber 100, remove the extruding pipe fitting.This extruding pipe fitting is for being used for follow-up accurately machined blank pipe.The end of pipe is offered screw thread and machined in a conventional manner, to be formed into QC.
Referring to Figure 20, express an improved plug that is totally marked by reference number 44 ' is arranged in container 12 in the expansion step of the forward end of pipe situation among the figure.Plug 44 ' has the frusto-conically shaped portion 52 ' that a columniform back outwards tilts to the front end of plug from the mid portion 50 ' of tube reducing to the cylindrical part 50 ' of 48 ', one tube reducing in end and.Plug 44 ' is back identical with plug 44 with mid portion to part plug.Yet the conical butt forward direction part of plug 44 ' is different with plug 44.The external diameter of the forward end of plug 44 ' is greater than the external diameter of mid portion 50, and less than the external diameter of back to part 48 '.When front end by the tapering part 52 ' of plug 44 ' of the front end of the initial forward end 62 of pipe, part 62 becomes cylindrical, as shown in figure 20.Yet the internal diameter of the forward end 62 of expansion is less than the internal diameter of the mid portion 64 of pipe.
Thus, describe the present invention, its content new, that require to obtain protection of the patent right is defined by the claims.
Claims (33)
1. one kind is used to push and has the equipment of the metal tube of the internal diameter of homogeneous basically, described pipe has after the forward end, one to end and a mid portion, the external diameter of described mid portion is significantly less than described forward end and the external diameter of back to one of end, and described equipment comprises:
(a) frame;
(b) container that is supported on the frame, described container has longitudinal center's axis and one and described longitudinal center coaxial vertical cylindrical first hole of axis, this hole is used to receive the cylindrical metal blank with a vertical cylindrical hole, and described container has an open front that communicates with described first hole and an after-opening that communicates with described first hole;
(c) one have one with the cylindrical internal mold in coaxial cylindrical second hole, described first hole, described internal mold has the external diameter with the equal diameters in described first hole, described second hole has the diameter littler than the diameter in described first hole, described internal mold longitudinally is divided into two half modules that equate basically, between the external position in the interior location adjacent with described open front one and the outside, described first hole, described internal mold can move through described open front along described longitudinal center axis in described first hole;
(d) outer membrane module that is positioned at before the described container and has vertical cylindrical the 3rd hole, described the 3rd hole is coaxial with described first and second holes, and have than the big diameter in described second hole, one of described outer membrane module and described container can move between an operating position and an off-position along described longitudinal center axis, on described operating position, described container and described outer membrane module are adjacent in described open front place, on described off-position, described outer membrane module and described container are spaced apart fully, so that described internal mold can be moved on the described external position, so that pull down from described equipment;
(e) one be positioned at described container back and can along described longitudinal center axis towards with away from described container the press that moves, described press has a circular forward direction pressed surface and the plug that extends forward towards described after-opening from described pressed surface in the face of the after-opening of described container, described pressed surface and described plug are coaxial with described first hole, described pressed surface has with the internal diameter in described first hole goes up identical external diameter basically, and leave enough gaps, so that described pressed surface can be vertically moved in described first hole, described plug comprises that a cylindrical back with external diameter littler than the internal diameter in described second hole is to part, one has than the described back cylindrical midsection branch to the little external diameter of the external diameter of part, with one from described mid portion extend forward and external diameter from waiting until the conical butt forward direction part that equally changes basically to the external diameter of part with described back mutually with the external diameter of described mid portion; And
(f) actuator, be used for along described longitudinal axis make described outside one of membrane module and described container move with respect to another of membrane module outside described and described container.
2. equipment as claimed in claim 1, it is characterized by, the longitudinal length of described plug each several part for the longitudinal length of described internal mold and specific charge length, should make when blank promoted forward by described press and engage with described internal mold and along described longitudinal center axis with described press release forward one first apart from and arrive such point, be that described back is located to the end at the back of described second hole to part, in order to force the metal on the described blank to pass through described second hole round described plug, so that when squeezing out the initial forward end of described pipe, described mid portion is in described second hole, the initial forward end of wherein said pipe have with the external diameter of the equal diameters in described second hole and with the internal diameter of the equal diameters of described mid portion, the described press second distance that moves before the described vertical central axis alignment, simultaneously described back is to partly in described second hole, this makes the metal on the described blank be forced to pass through described second hole around the back of described plug to part, so that squeeze out the mid portion of described pipe, the mid portion of wherein said pipe has and the internal diameter equal outer diameters in described second hole and the internal diameter that equates to external diameter partly with described back, the described press second distance that travels forward also makes the initial forward end of described pipe pass through the forward direction part of described plug, thereby make described initial forward end with respect to described longitudinal center axis horizontal expansion, to mold the forward end of described pipe, the forward end of wherein said pipe have with the internal diameter that equates of external diameter from described plug back to part and than the big thickness of thickness of the mid portion of described pipe, pull down from described equipment described internal mold and simultaneously described outside after membrane module is positioned on the described operating position, described press one the 3rd distance of moving before the described vertical central axis alignment, this forces the metal on the described blank to center on the back to partly passing through described the 3rd hole of described plug, so that squeeze out the back of described pipe to part, wherein said pipe back to part have the internal diameter that equates to the external diameter of part with described back and with the internal diameter equal outer diameters in described the 3rd hole.
3. equipment as claimed in claim 1 is characterized by, and described outer membrane module comprises:
(a) die holder with one the 4th hole, after described die holder has one to end and a forward end;
(b) one is arranged in described the 4th hole and comprises the external mold in described the 3rd hole to end place at the back of described outer mould base; And
(c) retainer that is arranged in described the 4th hole at the forward end place of described die holder, described retainer have cylindrical five hole of a diameter greater than the diameter in described the 4th hole.
4. equipment as claimed in claim 1 is characterized by, and to the end, and described press comprised after described plug had one:
(a) housing, this housing have a chamber that is used to hold described plug and one and have a forward end of leading to the hole of described chamber;
(b) one is positioned at the modular ring at the forward end place of described housing in described open front place, and described modular ring comprises described forward direction pressed surface and a cylindrical hole, and the external diameter to part behind the internal diameter of described cylindrical hole and the described plug equates basically; And
(c) back drive unit on the end that is operably connected to described plug; be used to make described plug between a position of returning backward and a position of stretching out forward, to move along described longitudinal center axis; on described position of returning backward; described back to part described indoor; on described position of stretching out forward; described plug back in the hole of part at described modular ring, and the remainder of described plug is before described modular ring.
5. equipment as claimed in claim 1 is characterized by, and described equipment further comprises an actuator, be used for along described longitudinal center axis make described outside one of membrane module and described container move with respect to another of membrane module outside described and described container.
6. equipment as claimed in claim 5 is characterized by, and described actuator is a fluid actuator, comprising:
(a) hydraulic cylinder that is fixed on the described frame; And
(b) piston, it can slide and have one and extend and be operably connected to back to the end on the described container to described hydraulic cylinder back in described hydraulic cylinder.
7. equipment as claimed in claim 6, it is characterized by, a described first fluid actuator is in a side of described longitudinal center axis, and one second fluid actuator is at the opposite side of described longitudinal center axis, and described container is fixed on the piston of described first and second fluid actuators.
8. equipment as claimed in claim 1 is characterized by, and described outer membrane module comprises:
(a) one have one with the carriage of the coaxial centre bore of described longitudinal center axis, described centre bore have one to open front and one to after-opening;
(b) die holder that is positioned at the opening part forward of described centre bore in described centre bore, described die holder have behind cylindrical the 4th hole, one to end and a forward end; And
(c) the back of a membrane module outside described is arranged in described the 4th hole and comprises the external mold in described the 3rd hole to end place; With a retainer that is arranged in described the 4th hole at the forward end place of described die holder, described retainer has cylindrical the 5th hole, and the diameter in this hole is bigger than the diameter in described the 4th hole.
9. equipment as claimed in claim 8 is characterized by, and described outer membrane module further comprises one in described centre bore and around the snap ring of described die holder.
10. equipment as claimed in claim 9, it is characterized by, described outer membrane module further comprises one in described centre bore and the fixed head before described die holder, described fixed head has a cylindrical hole, this hole is coaxial and its diameter is bigger than the diameter in described the 5th hole with described longitudinal center axis, and is littler than the diameter in described the 4th hole.
11. equipment as claimed in claim 10, it is characterized by, described outer membrane module further comprises a guide pipe to open front that is fixed on the described fixed head and extends through described centre bore forward, and this guide pipe has at least the same big internal diameter of internal diameter with the hole of described fixed head.
12. equipment as claimed in claim 1, it is characterized by, described frame has a chamber, this chamber has an after-opening and an open front, described outer membrane module is arranged in described chamber, so that vertically move along described longitudinal center axis, described equipment further comprises a disengageable stop mechanism, is used for releasably described outer membrane module is remained on described chamber with mode that described internal mold effectively contacts.
13. equipment as claimed in claim 12, it is characterized by, described frame has a transverse holes, intersect with respect to the axis horizontal expansion of described longitudinal center and with described chamber in this hole, described disengageable stop mechanism comprises a valve that can be slidably mounted in the described transverse holes between an operating position and off-position, on described operating position, at least a portion of described valve is in described chamber, on off-position, described valve is outside described chamber.
14. equipment as claimed in claim 13 is characterized by, described disengageable stop mechanism further comprises an actuator, is used for selectively described valve being moved to described operating position and described off-position.
15. equipment as claimed in claim 14 is characterized by, described actuator is a fluid actuator.
16. equipment as claimed in claim 1 is characterized by, described equipment further comprises a guide table before the membrane module outside described, and when extruding during described pipe, it is used for described pipe is supported and leads.
17. equipment as claimed in claim 16 is characterized by, described guide table has upwardly extending roller, is used to support described extruding pipe fitting.
18. equipment as claimed in claim 17 is characterized by, described equipment further comprises a guide pipe that membrane module extends to described guide table outside described, is used for described extruding pipe fitting membrane module outside described is directed to described guide table.
19. plug that is used for a metal extrusion press, described metal extrusion press is used for the extrusion metal pipe, described metal tube has the homogeneous internal diameter as first size, after the forward end, one to end and one in described forward end and back the mid portion between the end, described mid portion has the external diameter as second size, and described back has respectively than the big external diameter of described second size to end and forward end, and described plug comprises:
(a) a cylindrical back is to part, and it has and described first size equal outer diameters;
(b) cylindrical midsection branch, it has and is significantly less than the described back external diameter to the external diameter of part; And
(c) forward direction part, this forward direction partly has a frusto-conical outer surface of extending forward from described mid portion, and its external diameter changes to equaling the external diameter ground of described back to part from the external diameter that equals described mid portion.
20. the method for extruding one cylindrical metal tube, described metal tube has constant inner diameter, described pipe has after the forward end, one to end and a mid portion, the external diameter of described mid portion is significantly less than the external diameter of each in the end of described forward end and back, and described method comprises:
(a) the cylindrical metal blank by having cylindrical vertical hole with is inserted cylindrical first hole to a container from an after-opening, described metal stock is positioned in described first hole, described first hole has longitudinal center's axis, described container has one and leads to the open front in described first hole and accommodate one and be positioned at described first hole and internal mold and with a described open front adjacent external mold at described external container adjacent with described open front, described internal mold has cylindrical second hole, the diameter in this hole is littler than the diameter in described first hole, described external mold has one the 3rd hole, the diameter in this hole is less than the diameter in described first hole and greater than the diameter in described second hole, described internal mold and external mold all can move along described longitudinal center axis selectively, and described internal mold comprises two discerptible half modules;
(b) arrange a press along described longitudinal center axis, described press has a circular forward direction pressed surface and the plug that extends forward towards described container from described pressed surface in the face of described container, described pressed surface and described plug are coaxial with described first hole, described pressed surface has the external diameter substantially the same with the internal diameter in described first hole, and leave enough gaps, so that described pressed surface is vertically moved in described first hole, described plug have a diameter than little cylindrical back, described second hole to part, a diameter is back to the little cylindrical midsection branch of part than described, with a conical butt forward direction part of extending forward, its diameter changes to equaling the diameter ground of described back to part from the diameter that equals described mid portion;
(c) before described vertical central axis alignment, move described press, thereby described plug extends through the hole of described blank, and described mid portion is positioned at described second hole, so that form one first annular opening, when described forward direction pressed surface engages with described blank for the first time, described mid portion and described back separate with described internal mold backward to the joint of part, so that described blank is pressed against on the described internal mold;
(d) along described longitudinal center axis described press is moved forward one first distance to such point, to be described mid portion and described back be positioned at the back of described second hole to the joint of part locates to the end, so that force the metal on the described blank to pass described first annular opening, to squeeze out the initial forward end of pipe, this forward end has and the internal diameter equal outer diameters in described second hole and the internal diameter that equates with the external diameter of described mid portion;
(e) to the described longitudinal center in the state lower edge axis that part is positioned at described second hole described press is moved forward a second distance in described back, to form one second annular opening, in order to force the metal on the described blank to pass described second annular opening, squeeze out the mid portion of described pipe, this mid portion have with the internal diameter equal outer diameters in described second hole and with the internal diameter of described back to the equal diameters of part, and in described press moves forward the process of described second distance, make the initial forward end of pipe through the forward direction part of described plug, thereby make the initial forward end of described pipe equal the internal diameter of the mid portion of described pipe to internal diameter with respect to the axis ground lateral magnification of described longitudinal center, external diameter is greater than the degree of the external diameter of the mid portion of described pipe;
(f) move one of described external mold and described container along described longitudinal center axis, thereby make described external mold and the spaced apart distance that equals the longitudinal length of described internal mold at least of described fixed container;
(g) from described first hole by described open front pull down described internal mold, thereby make described internal mold before described container;
(h) take off the half module of described internal mold from described pipe and plug;
(i) behind described vertical central axis alignment, move one of described external mold and described container, thereby described external mold engages with described container and is described back to partly in described the 3rd circular port, to form one the 3rd annular opening;
(j) make described press move forward one the 3rd distance along described longitudinal center axis, be used to force the metal on the described blank to pass described the 3rd annular opening, squeezing out the back of described pipe to the end, this back to the end have the internal diameter that equates to the external diameter of part with described back and and the internal diameter equal outer diameters in described the 3rd hole; And
(k) unload described extruding pipe fitting from described plug.
21. the method for extrusion metal pipe as claimed in claim 20 is characterized by, and till making described plug move after described plug is positioned at described extruding pipe fitting along described longitudinal center axis backward, described extruding pipe fitting is unloaded from described plug.
22. the method for extrusion metal pipe as claimed in claim 20, it is characterized by, in the step (f) of claim 20, described container moves with respect to described external mold and described plug backward along described longitudinal center axis, is used to force described internal mold to shift out described first hole.
23. the method for extrusion metal pipe as claimed in claim 20 is characterized by, after described plug had moved forward described the 3rd distance, the not crimping section of described blank was retained in described first hole, and described method comprises following additional step:
(a) move described plug behind the described vertical central axis alignment, after described plug is positioned at described extruding pipe fitting till;
(b) move one of described external mold and described container before the described vertical central axis alignment, thereby make described external mold and described container spaced apart; And
(c) from the back not crimping section that removes out described blank to the end of described extruding pipe fitting.
24. the method for extrusion metal pipe as claimed in claim 23, it is characterized by, in the step (b) of claim 23, described container moves with respect to described external mold and described plug backward along described longitudinal center axis, is used to force the not crimping section of described blank to leave described first hole.
25. the method for an extruded cylindrical metal tube, described metal tube has the homogeneous internal diameter as first size, after the forward end, one to end and one in described forward end and back the mid portion between the end, described mid portion has the external diameter as second size, and described back has respectively than the big external diameter of described second size to end and forward end, and described method comprises the steps:
(a) in a cylindrical hole of a container, a cylindrical metal blank was pressed one first annular opening, described opening has less than the internal diameter of described first size and equals the external diameter of described second size, so that squeeze out the initial forward end of the internal diameter of described pipe less than described first size;
(b) in described hole described metal stock was pushed one second annular opening, described opening has the internal diameter that equals described first size and equals the external diameter of described second size, so that squeeze out the mid portion of described pipe;
(c) the initial forward end with described pipe moves past a plug, described plug has a frusto-conical outer surface, its shape can be used for expanding the initial forward end of described pipe, equals described first size and the external diameter forward end greater than the described pipe of described second size to form internal diameter; And
(d) in described hole described metal stock was pushed one the 3rd annular opening, the internal diameter of described opening equals described first size, and external diameter is greater than described the 3rd size, to squeeze out the back to the end of described pipe.
26. equipment that is used for the extrusion metal pipe, described metal tube has after the forward end, one to end and a mid portion, the external diameter of described mid portion is significantly less than the external diameter of each in the end of described forward end and back, the internal diameter of described forward end is less than the internal diameter of described back each in end and described mid portion, and described equipment comprises:
(a) frame;
(b) container that is supported on the frame, described container has longitudinal center's axis and one and vertical cylindrical first hole of described central longitudinal to axis coaxle, this hole is used to admit the cylindrical metal blank with a vertical cylindrical hole, and described container has an open front that communicates with described first hole and an after-opening that communicates with described first hole;
(c) one have one with the cylindrical internal mold in coaxial cylindrical second hole, described first hole, described internal mold has the external diameter with the equal diameters in described first hole, described second hole has the diameter littler than the diameter in described first hole, described internal mold longitudinally is divided into two half modules that equate basically, one in described first hole and the interior location adjacent and one with described open front between the external position in the outside, described first hole, described internal mold can move through described open front along described longitudinal center axis;
(d) outer membrane module that is positioned at before the described container and has vertical cylindrical the 3rd hole, described the 3rd hole is coaxial with described first and second holes, and have than the big diameter in described second hole, one of described outer membrane module and described container can move between an operating position and an off-position along described longitudinal center axis, wherein on the operating position, described container and described outer membrane module lean in described open front place, on off-position, described outer membrane module and described container are spaced apart fully, so that described internal mold can be moved on the described external position, so that pull down from described equipment;
(e) one be positioned at described container back and can along described longitudinal center axis towards with away from described container the press that moves, described press has a circular forward direction pressed surface and the plug that extends forward towards described after-opening from described pressed surface in the face of the after-opening of described container, described pressed surface and described plug are coaxial with described first hole, described pressed surface has with the internal diameter in described first hole goes up identical external diameter basically, and leave enough gaps, so that described pressed surface can be vertically moved in described first hole, described plug comprises that a cylindrical back with external diameter littler than the internal diameter in described second hole is to part, one has than the cylindrical midsection branch of described back to the little external diameter of the external diameter of part, with a conical butt forward direction part of extending forward from described mid portion, the external diameter of this part from the external diameter that equals described mid portion to greater than the external diameter of described mid portion and less than described back to the variation of the external diameter ground of part; And
(f) actuator, be used for along described longitudinal axis make described outside one of membrane module and described container move with respect to another of membrane module outside described and described container.
27. plug that is used for metal extrusion press, described metal extrusion press is used for the extrusion metal pipe, described metal tube has the homogeneous internal diameter as first size, after the forward end, one to end and one in described forward end and back the mid portion between the end, described mid portion has as the internal diameter of first size with as the external diameter of second size, described back has respectively than the big external diameter of described second size to end and forward end, described forward end has the internal diameter less than described first size, and described plug comprises:
(a) a cylindrical back is to part, and it has and described first size equal outer diameters;
(b) cylindrical midsection branch, it has and is significantly less than the described back external diameter to the external diameter of part; And
(c) forward direction part, this forward direction partly has a frusto-conical outer surface of extending forward from described mid portion, its external diameter from the external diameter that equals described mid portion to changing less than described first size and greater than the external diameter ground of described mid portion.
28. the method for extruding one cylindrical metal tube, described metal tube has after the forward end, one to end and a mid portion, the external diameter of described mid portion is significantly less than the external diameter of each in the end of described forward end and back, described forward end has the internal diameter less than the internal diameter of described back each in end and described mid portion, and described method comprises:
(a) be inserted to cylindrical first hole of a container from an after-opening by the cylindrical metal blank that has a cylindrical vertical hole with, described metal stock is placed described first hole, described first hole has longitudinal center's axis, described container have one lead to the open front in described first hole and accommodate one in described first hole and the internal mold adjacent and one with described open front at described external container and the external mold adjacent with described open front, described internal mold has cylindrical second hole, this hole has the diameter littler than the diameter in described first hole, described external mold has one the 3rd hole, this hole has less than the diameter in described first hole and greater than the diameter of the diameter in described second hole, described internal mold and external mold all can move along described longitudinal center axis selectively, and described internal mold comprises two discerptible half modules;
(b) arrange a press along described longitudinal center axis, described press has a circular forward direction pressed surface and the plug that extends forward towards described container from described pressed surface in the face of described container, described pressed surface and described plug are coaxial with described first hole, described pressed surface has the external diameter substantially the same with the internal diameter in described first hole, and leave enough gaps, so that described pressed surface is vertically moved in described first hole, described plug have an external diameter than the little cylindrical back of the internal diameter in described second hole to part, a diameter is back to the little cylindrical midsection branch of part than described, with a conical butt forward direction part of extending forward from described mid portion, its external diameter changes greater than the external diameter of described mid portion and less than the diameter ground of described back to part from the outer radial that equals described mid portion;
(c) before described vertical central axis alignment, move described press, thereby described plug extends through the hole of described blank, and described mid portion is arranged in described second hole, so that form one first annular opening, when described forward direction pressed surface engages with described blank for the first time, described mid portion and described back are separated with described internal mold backward to the joint of part, so that described blank is pressed against on the described internal mold;
(d) along described longitudinal center axis described press is moved forward one first distance to such point, to be described mid portion and described back be positioned at the back of described second hole to the joint of part locates to the end, so that force the metal on the described blank to pass described first annular opening, squeeze out the initial forward end of pipe, this forward end has and the internal diameter equal outer diameters in described second hole and the internal diameter that equates with the external diameter of described mid portion;
(e) to the described longitudinal center in the state lower edge axis that part is positioned at described second hole described press is moved forward a second distance in described back, to form one second annular opening, be used to force metal to pass described second annular opening from described blank, squeeze out the mid portion of described pipe, this mid portion have with the internal diameter equal outer diameters in described second hole and with the internal diameter of described back to the equal diameters of part, and in described press has moved forward the process of described second distance, make the initial forward end of pipe through the forward direction part of described plug, thus the initial forward end that makes described pipe with respect to the axis lateral magnification of described longitudinal center to the internal diameter of internal diameter less than the mid portion of described pipe, external diameter is greater than the degree of the external diameter of the mid portion of described pipe;
(f) move one of described external mold and described container along described longitudinal center axis, thereby make described external mold and the spaced apart distance that equals the longitudinal length of described internal mold at least of described fixed container;
(g) from described first hole by described open front pull down described internal mold, thereby make described internal mold before described container;
(h) pull down the half module of described internal mold from described pipe and plug;
(i) behind described vertical central axis alignment, move one of described external mold and described container, so that described external mold engages with described container and be described back to partly in described the 3rd circular port, to form one the 3rd annular opening;
(j) make described press move forward one the 3rd distance along described longitudinal center axis, be used to force metal to pass described the 3rd annular opening from described blank, so that squeeze out the back of described pipe to end parts, this back to the end have the internal diameter that equates to the external diameter of part with described back and and the internal diameter equal outer diameters in described the 3rd hole; And
(k) unload described extruding pipe fitting from described plug.
29. the method for extrusion metal pipe as claimed in claim 28 is characterized by, and till making described plug move after described plug is positioned at described extruding pipe fitting along described longitudinal center axis backward, described extruding pipe fitting is unloaded from described plug.
30. the method for extrusion metal pipe as claimed in claim 28, it is characterized by, in the step (f) of claim 20, described container moves with respect to described external mold and described plug backward along described longitudinal center axis, is used to force described internal mold to shift out described first hole.
31. the method for extrusion metal pipe as claimed in claim 28 is characterized by, after described plug had moved forward described the 3rd distance, the not crimping section of described blank was retained in described first hole, and described method comprises following additional step:
(a) move described plug behind the described vertical central axis alignment, after described plug is positioned at described extruding pipe fitting till;
(b) move one of described external mold and described container before the described vertical central axis alignment, thereby make described external mold and described container spaced apart; And
(c) from the back not crimping section that removes out described blank to the end of described extruding pipe fitting.
32. the method for extrusion metal pipe as claimed in claim 31, it is characterized by, in the step (b) of claim 23, described container moves with respect to described external mold and described plug backward along described longitudinal center axis, is used to force the not crimping section of described blank to leave described first hole.
33. the method for extruding one cylindrical metal tube, described metal tube have after the forward end, one to end and one in described forward end and back the mid portion between the end, described mid portion has as the internal diameter of first size with as the external diameter of second size, described back has as the internal diameter of described first size with greater than the external diameter of described second size to the end, described forward end has greater than the external diameter of described second size with as the internal diameter less than described first size of the 3rd size, and described method comprises the steps:
(a) in the cylindrical hole of a container, a cylindrical metal blank was pressed one first annular opening, described opening has less than the internal diameter of described the 3rd size and equals the external diameter of described second size, with the internal diameter that the squeezes out described pipe initial forward end less than described the 3rd size;
(b) in described hole, pressed one second annular opening, described opening to have the internal diameter that equals described first size described metal base and equaled the external diameter of described second size, to squeeze out the mid portion of described pipe;
(c) the initial forward end with described pipe moves past a plug, described plug has a frusto-conical outer surface, its shape can be used for expanding the initial forward end of described pipe, equals described the 3rd size and the external diameter forward end greater than described second size with the internal diameter that forms described pipe; And
(d) in described hole described metal stock was pressed one the 3rd annular opening, the internal diameter of described opening is greater than described first size, and external diameter is greater than described second size, to squeeze out the back to the end of described pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10379898P | 1998-10-09 | 1998-10-09 | |
| US60/103,798 | 1998-10-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1326387A true CN1326387A (en) | 2001-12-12 |
Family
ID=22297083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99813407.4A Pending CN1326387A (en) | 1998-10-09 | 1999-10-08 | Apparatus and method for forming pipe with increased wall-thickness at its end |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP1121209B1 (en) |
| JP (1) | JP2002527241A (en) |
| CN (1) | CN1326387A (en) |
| AT (1) | ATE239562T1 (en) |
| AU (1) | AU1108600A (en) |
| BR (1) | BR9914346A (en) |
| CA (1) | CA2346705A1 (en) |
| CZ (1) | CZ20011246A3 (en) |
| DE (1) | DE69907711D1 (en) |
| MX (1) | MXPA01003613A (en) |
| NO (1) | NO20011682L (en) |
| OA (1) | OA11911A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443208C (en) * | 2006-11-10 | 2008-12-17 | 钱宗富 | Method for extruding and stretching short pipe to long pipe and its cold extrusion device |
| CN103736768A (en) * | 2013-12-31 | 2014-04-23 | 西南石油大学 | Squeezing device and method for tubular material with unchanged inner diameter and increased thicknesses of both end walls as well as squeezing method thereof |
| CN104384220A (en) * | 2014-12-10 | 2015-03-04 | 常州市腾田液压机械有限公司 | Thermal shrinkage or thermal expansion forming unit for pipe |
| CN109346596A (en) * | 2018-09-11 | 2019-02-15 | 中国科学院上海硅酸盐研究所 | A kind of preparation facilities of annular thermo-electric device and its method for preparing annular thermo-electric device |
| CN110227730A (en) * | 2019-06-13 | 2019-09-13 | 北京科技大学 | A kind of pressurizing unit producing Varied section seamless pipe and method |
| CN113357220A (en) * | 2021-06-01 | 2021-09-07 | 内蒙古北方重工业集团有限公司 | Core rod oil cylinder of vertical extruder and piston rod protection device thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009052482A1 (en) | 2009-02-11 | 2010-08-19 | Sms Meer Gmbh | Method and device for producing tubular workpieces from a pre-punched hollow block |
| JP5563874B2 (en) * | 2010-04-15 | 2014-07-30 | 前田建設工業株式会社 | Metal pipe injection material take-out machine |
| CN105149372B (en) * | 2015-09-30 | 2017-06-16 | 核兴航材（天津）科技有限公司 | A kind of asymmetric seamless hollow profile manufacturing process |
-
1999
- 1999-10-08 CA CA002346705A patent/CA2346705A1/en not_active Abandoned
- 1999-10-08 BR BR9914346-1A patent/BR9914346A/en not_active IP Right Cessation
- 1999-10-08 AU AU11086/00A patent/AU1108600A/en not_active Abandoned
- 1999-10-08 OA OA00100091A patent/OA11911A/en unknown
- 1999-10-08 MX MXPA01003613A patent/MXPA01003613A/en unknown
- 1999-10-08 JP JP2000575648A patent/JP2002527241A/en active Pending
- 1999-10-08 DE DE69907711T patent/DE69907711D1/en not_active Expired - Lifetime
- 1999-10-08 CZ CZ20011246A patent/CZ20011246A3/en unknown
- 1999-10-08 AT AT99954830T patent/ATE239562T1/en not_active IP Right Cessation
- 1999-10-08 EP EP99954830A patent/EP1121209B1/en not_active Expired - Lifetime
- 1999-10-08 CN CN99813407.4A patent/CN1326387A/en active Pending
-
2001
- 2001-04-04 NO NO20011682A patent/NO20011682L/en not_active Application Discontinuation
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443208C (en) * | 2006-11-10 | 2008-12-17 | 钱宗富 | Method for extruding and stretching short pipe to long pipe and its cold extrusion device |
| CN103736768A (en) * | 2013-12-31 | 2014-04-23 | 西南石油大学 | Squeezing device and method for tubular material with unchanged inner diameter and increased thicknesses of both end walls as well as squeezing method thereof |
| CN103736768B (en) * | 2013-12-31 | 2015-09-23 | 西南石油大学 | Internal diameter constant two ends wall thickness increases pressurizing unit and the pressing method of tubing |
| CN104384220A (en) * | 2014-12-10 | 2015-03-04 | 常州市腾田液压机械有限公司 | Thermal shrinkage or thermal expansion forming unit for pipe |
| CN109346596A (en) * | 2018-09-11 | 2019-02-15 | 中国科学院上海硅酸盐研究所 | A kind of preparation facilities of annular thermo-electric device and its method for preparing annular thermo-electric device |
| CN109346596B (en) * | 2018-09-11 | 2020-06-12 | 中国科学院上海硅酸盐研究所 | Preparation device and method for annular thermoelectric device |
| CN110227730A (en) * | 2019-06-13 | 2019-09-13 | 北京科技大学 | A kind of pressurizing unit producing Varied section seamless pipe and method |
| CN110227730B (en) * | 2019-06-13 | 2020-11-17 | 北京科技大学 | Extrusion device and method for producing variable-section seamless pipe |
| CN113357220A (en) * | 2021-06-01 | 2021-09-07 | 内蒙古北方重工业集团有限公司 | Core rod oil cylinder of vertical extruder and piston rod protection device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9914346A (en) | 2002-01-15 |
| OA11911A (en) | 2006-04-10 |
| EP1121209B1 (en) | 2003-05-07 |
| CZ20011246A3 (en) | 2002-02-13 |
| DE69907711D1 (en) | 2003-06-12 |
| ATE239562T1 (en) | 2003-05-15 |
| CA2346705A1 (en) | 2000-04-20 |
| MXPA01003613A (en) | 2002-09-18 |
| AU1108600A (en) | 2000-05-01 |
| NO20011682L (en) | 2001-05-16 |
| JP2002527241A (en) | 2002-08-27 |
| NO20011682D0 (en) | 2001-04-04 |
| EP1121209A1 (en) | 2001-08-08 |
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