CN103691789B - A kind of method of large thick-wall cylindrical blank hot spinning forming head - Google Patents

A kind of method of large thick-wall cylindrical blank hot spinning forming head Download PDF

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Publication number
CN103691789B
CN103691789B CN201310660819.6A CN201310660819A CN103691789B CN 103691789 B CN103691789 B CN 103691789B CN 201310660819 A CN201310660819 A CN 201310660819A CN 103691789 B CN103691789 B CN 103691789B
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spinning
cylindrical blank
blank
thick
hot
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CN103691789A (en
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吴生富
赵玲玲
刘颖
刘凯泉
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Tianjin Heavy Equipment Engineering Research Co Ltd
China First Heavy Industries Co Ltd
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Tianjin Heavy Equipment Engineering Research Co Ltd
China First Heavy Industries Co Ltd
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Abstract

A kind of method that the invention discloses large thick-wall cylindrical blank hot spinning forming head, it is adaptable to wall thickness is more than 80mm, the diameter large-sized end enclosure forging entirety more than 4000mm manufactures.Main technological steps is as follows: 1) cylindrical blank deformation section is heated to more than austenite transformation temperature;2) blank is installed, is fixed on spinning machine;3) blank carries out multi-pass hot spinning with spinning machine main shaft rotation, the cooperation of inside and outside running roller, is controlled wall thickness dimension and the shape of end socket forging by outer roller roll gap gap in adjusting and movement locus.Present invention, avoiding the operation with press forging cheese blank, and by conventional processes the most stamping for cheese blank, it is not necessary to prepare Special punching die, it is adaptable to large-sized end enclosure forging entirety manufactures.

Description

A kind of method of large thick-wall cylindrical blank hot spinning forming head
Technical field
The present invention relates to the process of a kind of large thick-wall cylindrical blank hot spinning forming head, especially suitable In wall thickness more than 80mm, the overall manufacture of the diameter ultra-large type end socket forging more than 4000mm, belong to Big Steel Castings Forging manufacturing technology field.
Background technology
Along with developing rapidly of petrochemical industry and nuclear power industry, the specification of large pressurized vessel is gradually increased.Make End socket for one of large pressurized vessel key component belongs to large thick-wall part, and its size is with pressure vessel specification Increasing and increase, manufacture difficulty increases the most therewith.At present, the manufacturing process that large thick-wall end socket forging is conventional Mainly comprise the steps that (1) utilizes press, use open die forging mode to prepare patty blank;(2) will circle Cheese blank is machined out;(3) the patty blank after machining is stamping in particular manufacturing craft.Pin End socket to different size, this traditional handicraft needs to be equipped with special punching press accessory, and accessory versatility is not strong, system Cause high.Further, due to compressor operation limited space, the maximum gauge that can be forged into patty blank is subject to The restriction in existing compressor operation space.I.e. use Sheet Metal Forming Technology forged head, if required cheese blank diameter surpasses Go out the working range of existing press, then cannot realize the solid forging of large thick-wall end socket, become restriction big Type thick wall head forging bottleneck made in one piece.
Summary of the invention
In order to solve the problem of large thick-wall end socket forging integral forging and forming difficulty, the invention provides one Use the process of large thick-wall cylindrical blank hot spinning forming head, it is adaptable to wall thickness is more than 80mm, directly The overall manufacture of the footpath large-sized end enclosure forging more than 4000mm.The end socket processed by this method, globality Good, deformation force is little.Technical scheme is as follows:
A kind of method of large thick-wall cylindrical blank hot spinning forming head, heats including by described cylindrical blank Step and use spinning machine cylindrical blank wall is carried out the integrally formed step of hot spinning.
Described heating refers to be heated to more than austenite transformation temperature.
Described hot spinning refers to multi-pass hot spinning.
Coordinating described multi-pass hot spinning, the step of described heating is many fire time heating, i.e. drops when blank temperature Time as little as under feasibility deformation temperature, just blank is heated, then proceed spinning.
Realize especially by following steps:
1) one section of cylindrical blank is divided into the section of being installed and closing in deformation section along length, only closing in deformation section is added Heat is to more than austenite transformation temperature;
2), after closing in deformation section being heated to austenite transformation temperature, be installed spinning machine by the described section of being installed On fixture, the centrage of cylindrical blank is kept to overlap with spinning machine spindle centerline, inside and outside by spinning machine Running roller is respectively placed in barrel inside and outside both sides spinning starting point;
3) after blank and running roller are installed and put in place, start spinning machine, make cylindrical blank with spinning machine main shaft rotation, Inside and outside running roller is then made to carry out heat along the spinning course bearing feeding preset rotation, the cooperation of inside and outside running roller Spinning monolithic molding.
In step 3), the cooperation of inside and outside running roller carries out multi-pass hot spinning shaping.
The spinning face that described inside and outside running roller contacts with blank is arc surface.
And during every a time hot spinning, running roller is to closing in extreme direction from the big end of closing in deformation section, along rotation Pressure track feeding, and spinning starting point move closer to described in the section of being installed, each axial internal clearance of spinning starting point exists Between 100~210mm.
During hot spinning, by adjusting the wall thickness of the roll gap clearance control end socket of inside and outside running roller, by adjusting roller The shape of the spinning TRAJECTORY CONTROL end socket of wheel.
The described section of being installed can complete end socket and part straight section cylinder as a part for pressure vessel straight section cylinder Monolithic molding, reduce splicing welding joint.
The present invention can process wall thickness more than 80mm, the diameter large-sized end enclosure more than 4000mm.
The present invention and conventionally employed Sheet Metal Forming Technology manufacture compared with large thick-wall end socket forging, there is advantages below:
(1) present invention is changed the blank of forming head forging into cylindrical blank by patty blank, has broken away from pressure Machine work space, to shaping the restriction of patty blank diameter size, expands and can shape integrated head forging Dimensions.
(2) present invention need not prepare diel, decreases diel placing space and manufacturing cost.
(3) present invention uses cylindrical blank hot spinning to manufacture end socket forging and can complete end socket and pressure vessel portion Divide the monolithic molding of straight section cylinder, reduce splicing welding joint, improve the stability that pressure vessel and equipment runs.
(4), when the present invention implements hot spinning technique, different roller spinning tracks can be used, it is possible to achieve Different size, the entirety without mould of difformity end socket forging manufacture, and reach energy-saving and cost-reducing purpose.
In sum, the present invention is especially suitable for the solid forging of large thick-wall end socket forging.
Accompanying drawing explanation
Fig. 1 is cylindrical blank schematic diagram;
Fig. 2 is the schematic diagram using spinning machine to carry out cylindrical blank hot spinning forming head forging;
Fig. 3 is cylindrical blank multi-pass hot spinning process schematic representation;
Fig. 4 is the integrated head schematic diagram of band straight section.
Detailed description of the invention
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
The present invention uses the process of large thick-wall cylindrical blank hot spinning forming head, passes through following steps Realize:
(1) preparing one section of external diameter is D, and internal diameter is d, and wall thickness is the heavy wall cylindrical blank of t, wherein, D > Φ 4000mm, t=0.5 (D-d) > 80mm, and blank is divided into the section of being installed 1 and closing in deformation section 2 along length.
(2) only closing in deformation section 2 one end of cylindrical blank is heated, be heated to austenite transformation temperature Ac3Above.
(3) closing in deformation section 2 is heated to Ac3Afterwards, the section of being installed 1 is installed to spinning machine fixture 3, The centrage keeping cylindrical blank overlaps with spinning machine spindle centerline, as shown in Figure 2.By in spinning machine, Outer roller 4,5 is respectively placed in the inside and outside both sides of barrel of cylindrical blank.
Running roller is revolving body, both can under the drive of device for revolving and driving around oneself the centre of gyration rotate, Can also move along set track under the driving of feed arrangement.Cylindrical blank is folded in inner roll 4 with outer Between running roller 5, by the mould pressing of running roller, during every time spinning, first make two running rollers near blank Barrel medial and lateral, adjust running roller to spinning starting point, then start spinning by default spinning track.Logical Cross and adjust the roll gap gap of inside and outside running roller and movement locus controls wall thickness dimension and the shape of end socket forging, its In, in adjusting, outer roller gap is for controlling the wall thickness dimension of end socket forging, adjusts running roller movement locus and is used for Control the shape of end socket forging.The spinning face that running roller contacts with blank is arc surface, so can avoid spinning Time running roller forging surface caused chew, be conducive to improving the smooth degree on end socket forging surface, improve spinning Quality.
(4) after blank and running roller are installed and put in place, start spinning machine, make cylindrical blank with spinning machine main shaft certainly Turning (moving 1. shown in Fig. 2), inside and outside running roller is along spinning track feeding (moving 2. shown in Fig. 2) 3. rotation simultaneously (moves shown in Fig. 2).
Owing to large-sized end enclosure size is big, wall thickness, in spinning process, generally require inside and outside running roller and fit into Row multi-pass hot spinning.Fig. 3 is the schematic diagram of cylindrical blank multi-pass hot spinning forming head forging, spinning Time, the spinning starting point of running roller is positioned at the big end (close to the low temperature section of being installed 1 one end) of high temperature closing in deformation section 2, Running roller is progressively fed to closing in end along spinning track from the big end of deformation section that (determination of spinning track is according to concrete The overall dimensions of end socket forging is drawn by software simulation).After every time spinning completes, readjust running roller To the spinning starting point of lower a time, proceed spinning.Shown in Fig. 31,2,3 ... n is respectively spinning and rises Point, starting point moves closer to the low temperature section of being installed in order, and each axial internal clearance of spinning starting point is 100~210mm Between, the most both can save spinning force, can ensure that again that finished parts smooth surface shaped.Spinning track 1 ', 2 ', 3 ' ... n ' is the most secondary close to end socket shape.Along with increasing of spinning pass, tubular spinning blank is gradually Approach the shape of end socket forging.
When using cylindrical blank hot spinning to manufacture ultra-large thick-wall end socket forging, blank total deformation is big, deformation Drag is big, sometimes can not complete end socket forging forming process in a fire, a time, needs to carry out a fire Secondary, multi-pass hot spinning, or many fire, multi-pass hot spinning.Coordinate multi-pass hot spinning, can set up Many fire time heating, to ensure spinning temperature, it is simple to mould pressing.I.e. spinning process reduces when blank temperature Time to feasibility deformation temperature, need blank is re-started heating, then proceed spinning.Tool Body feasibility deformation temperature, spinning fire specifically determines according to parameters such as blank material, size, wall thickness.
At present, in large pressurized vessel manufacture process used by petrochemical industry and nuclear power industry, forge the most respectively Straight section cylinder and end socket, then weld together straight section cylinder and end socket.Utilize this technique, cylindrical blank The section of being installed 1 can be directly as the part straight section cylinder of pressure vessel, and the deformation section 2 that closes up is processed into envelope Head, completes the monolithic molding (see Fig. 4) of end socket and part straight section cylinder, decreases splicing welding joint, be conducive to carrying The stability that high pressure tankage runs.
Different roller spinning tracks is used to carry out hot spinning, it is possible to achieve different size, difformity end socket The Non-mould shaping of forging, reaches energy-saving and cost-reducing purpose.
Above-described embodiment has been only exemplified by the processing of large thick-wall end socket forging, for small-sized thin-wall part also Feasible, but often due to small-sized thin-wall part wall is thin, can realize only with an outside running roller hot spinning, Just can use with an outside irrealizable shaping large-scale, heavy section casting of running roller hot spinning only for those The method.What deserves to be explained is, all without departing from technical solution of the present invention perhaps according to core technology of the present invention The technical scheme that any simple modification, equivalent or the equivalent transformation made is formed, all should protect in the present invention Within the scope of protecting.

Claims (4)

1. the method for a large thick-wall cylindrical blank hot spinning forming head, it is characterised in that include institute State the step of cylindrical blank heating and use spinning machine that cylindrical blank wall carries out the integrally formed step of hot spinning, The method is applicable to wall thickness more than 80mm, the overall manufacture of the diameter large-sized end enclosure forging more than 4000mm;
Realize especially by following steps:
1) one section of cylindrical blank is divided into the section of being installed and closing in deformation section along length, only closing in deformation section is added Heat is to more than austenite transformation temperature;
2), after closing in deformation section being heated to more than austenite transformation temperature, be installed rotation by the described section of being installed On press fixture, keep cylindrical blank centrage overlap with spinning machine spindle centerline, by spinning machine, Outer roller is respectively placed in cylindrical blank wall inside and outside both sides spinning starting point;
3) after cylindrical blank and running roller are installed and put in place, start spinning machine, make cylindrical blank with spinning machine main shaft Rotation, then makes inside and outside running roller coordinate along the spinning course bearing feeding preset rotation, inside and outside running roller Carry out hot spinning monolithic molding;
Wherein, hot spinning is multi-pass hot spinning, coordinates multi-pass hot spinning, and inside and outside running roller becomes from closing up Holding to closing in extreme direction greatly of shape section, along spinning track feeding, starting point the most secondary near described in the section of being installed, often Secondary axial internal clearance is between 100~210mm.
The method of large thick-wall cylindrical blank hot spinning forming head the most according to claim 1, it is special Levying and be, described heating refers to be heated to more than austenite transformation temperature.
The method of large thick-wall cylindrical blank hot spinning forming head the most according to claim 1 and 2, It is characterized in that, coordinate described multi-pass hot spinning, the step of described heating is many fire time heating, i.e. works as cylinder When shape blank temperature is reduced under feasibility deformation temperature, just cylindrical blank is heated, then continue Carry out spinning.
The method of large thick-wall cylindrical blank hot spinning forming head the most according to claim 1, it is special Levying and be, the spinning face that described inside and outside running roller contacts with cylindrical blank is arc surface.
CN201310660819.6A 2013-12-06 2013-12-06 A kind of method of large thick-wall cylindrical blank hot spinning forming head Active CN103691789B (en)

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CN106439010A (en) * 2016-09-19 2017-02-22 宜兴华威封头有限公司 Closing-up seal head
EP3682981A1 (en) 2017-01-18 2020-07-22 Leifeld Metal Spinning AG Method and device for pressure rolling
CN109351835B (en) * 2018-11-13 2020-12-25 航天特种材料及工艺技术研究所 Integral spinning forming method for thin-wall shell with annular reinforcing rib and curved bus
CN109702024B (en) * 2018-11-23 2020-10-30 江苏理工学院 Plastic processing method for fine-grain magnesium alloy pipe
CN111112453A (en) * 2019-12-13 2020-05-08 首都航天机械有限公司 Integral forming method for bottom head of large-scale storage tank with high depth-diameter ratio
CN113118330B (en) * 2021-04-23 2021-11-12 武义盛世工贸有限公司 Efficient aluminium system kettle manufacture equipment
CN112916756B (en) * 2021-04-23 2021-12-17 武义盛世工贸有限公司 Manufacturing equipment of aluminum sports kettle
CN113290116A (en) * 2021-05-31 2021-08-24 西安交通大学 Opposite-wheel spinning manufacturing process of aluminum skirt special for rocket

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JPS61119334A (en) * 1984-11-15 1986-06-06 Asahi Malleable Iron Co Ltd Method and device for choking end part of cylindrical body
JPH04200933A (en) * 1990-11-30 1992-07-21 Daido Steel Co Ltd Method for forming round-head form of pipe end part
CN2211863Y (en) * 1994-09-10 1995-11-08 哈尔滨工业大学 Seal head rotary press edge turning machine
CN102000747A (en) * 2010-09-21 2011-04-06 国营江北机械厂 Hot spinning bottom-finishing method of seamless gas cylinder by positive roller
CN102259142A (en) * 2010-05-26 2011-11-30 陈万忠 Method and equipment for producing large-scale and ultra-thick end socket

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61119334A (en) * 1984-11-15 1986-06-06 Asahi Malleable Iron Co Ltd Method and device for choking end part of cylindrical body
JPH04200933A (en) * 1990-11-30 1992-07-21 Daido Steel Co Ltd Method for forming round-head form of pipe end part
CN2211863Y (en) * 1994-09-10 1995-11-08 哈尔滨工业大学 Seal head rotary press edge turning machine
CN102259142A (en) * 2010-05-26 2011-11-30 陈万忠 Method and equipment for producing large-scale and ultra-thick end socket
CN102000747A (en) * 2010-09-21 2011-04-06 国营江北机械厂 Hot spinning bottom-finishing method of seamless gas cylinder by positive roller

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