CN109848345A - A kind of tubing change wall thickness undergauge rotary extrusion forming device and method - Google Patents
A kind of tubing change wall thickness undergauge rotary extrusion forming device and method Download PDFInfo
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- CN109848345A CN109848345A CN201811599003.6A CN201811599003A CN109848345A CN 109848345 A CN109848345 A CN 109848345A CN 201811599003 A CN201811599003 A CN 201811599003A CN 109848345 A CN109848345 A CN 109848345A
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Abstract
A kind of tubing change wall thickness undergauge rotary extrusion forming device and method, it is related to materials processing technology field.The present invention expects that resistance of deformation is big, closing in difficulty causes to process duration, reduces stock utilization, increases production cost to solve the problems, such as that the upsetting in forming process of existing heavy caliber body is poly-.Forming device includes front template, rotary squeezing cavity plate, die socket, rear pattern plate, moving core and extruding punch, extruding punch is connected in the middle part of front template back end surface, the middle part of rear pattern plate front end face is embedded with die socket, rotary squeezing cavity plate is provided in die socket, the middle part on the inside of rotary squeezing cavity plate is arranged in moving core, moving core is connect with servo-actuating device, and moving core carries out axial feed and circumferential revolution by servo-actuating device.Manufacturing process includes installation forming device；Start extrusion molding；It restPoses.Processing of the present invention for large scale large-caliber pipe fittings or Cylinder shape constructional element.
Description
Technical field
The present invention relates to a kind of tubing to become wall thickness undergauge rotary extrusion forming device and method.
Background technique
It is particularly important one of process that necking (diameter), which is formed in heavy caliber space lunch device manufacturing process, and purpose exists
Necking deformation is carried out after crust is rough turn in the blank that will strike out hollow, certain wall thickness, tubular, to reach space lunch device
The curve shape of interior thorax, shape that head needs and size requirement.Necking (undergauge) is using necking die by cylindrical element or pipe
A kind of forming technology that shape blank oral area (outer diameter) reduces.Stamping necking, spinning necking etc. can be divided into according to necking down process method；
It is divided into drawing necking by necking mode of texturing and pushes necking.There is spindle-less to be divided into free necking when by necking and has mandrel contracting
Mouthful.Whole and split type two kinds of forms can be divided by mould profile.By whether heat can be divided into room temperature necking and heating necking,
Middle heating necking has heating tubing and heating mould two ways.In addition, there are also special necking forming method, as electromagnetism necking,
The special necking forming method such as explosive forming, drawing, Tube Hydroforming.During thin-wall pipes necking, due to by larger
Axial compression stress and circumferential compressive force be easy to cause force transmission region and deformed area unstability and wrinkle.According to spinning necking, force transmission region
Also it is easy to happen torsional deformation.To reduce and avoiding the defect generated in forming process, need using following measures: in force transmission region
Add Core support or carries out certain protection support in outer surface；When using pyrocondensation mouth, force transmission region can be cooled down, increase its change
Shape drag；Guarantee the sufficient lubrication of deformed area, reduce friction resistance force influences caused by it.
The wall thickness change of part is space lunch device another important technology characteristics during the preparation process, and tubing is becoming
It is main during wall thickness undergauge (for thickening) to realize wall thickness change by two kinds of processes.The first process be by
Tubing first thickens necking again, and be finally reached tubing thickens necking；Second of process is to thicken the necking of tubing elder generation again, most
The necking for reaching tubing eventually thickens.End upsetting is then mainly by the way that tubing local heating, tubing becomes under the action of extruding force
Shape, metal are full of between tubing and mold, make inside and outside diameter that a degree of change occur, to increase end wall thickness, are deformed
Mode is axial poly- material, and using radial clamping, the manufacturing process of axial compression.End upsetting mode has 3 kinds: it is thickeied in 1.,
Only reduce internal diameter, and outer diameter remains unchanged；2. external upset (EU) only increases outer diameter, and internal diameter remains unchanged；3. internal-external thickening,
Reduce internal diameter simultaneously and increases outer diameter.By the rule of the poly- material of pipe, when interior thickening, the outer diameter of materials in the tube is clamped by mold, internal diameter
It is in free deformation at deformation initial stage, stability of material is good；When external upset (EU), the internal diameter of materials in the tube is limited by punch-pin, and outer diameter exists
Deformation initial stage is in free deformation, and stability of material is slightly worse；When internal-external thickening, the internal-and external diameter of materials in the tube is at deformation initial stage
Free deformation, stability of material are poor.
Either using machining or rotary pressing processing technique, stock utilization is not in forming process for space lunch device
High (50% or so), process-cycle are longer, while resistance of deformation is larger when poly- material (wall thickness thickens > 200%) is closed up leads to tubing
Unstability even wrinkles, and product closes up difficult.Branch's upsetting can be used thus to shape, its main feature is that all having when each step upsetting
There is a certain amount of necking to deform, make total necking deformation distribution to per pass, thus can once complete closing in after poly- material
Forming.Since cavity plate wall the compression that pipe applies can be improved the anti-unstability ability of tube wall, there is certain contracting per pass
Resistance of deformation is big, close up difficult problem when mouthful deformation can be effectively improved poly- material necking, while being distributed few without cutting during upsetting
It cuts, working hour is few, high-efficient, cost is relatively low.But branch's upsetting forming increases process, multi-step forming is needed, for large quantities of
That there are still processes is more for amount production, the problem that occupation area of equipment is big, investment is big.The modes such as current machining and rotary pressing processing
It can not effectively solve the problems, such as that poly- material is difficult, closing in resistance of deformation is big, can only realize final part ruler by subsequent machining
Very little required precision, this undoubtedly extends processing duration, reduces stock utilization, increases production cost.
Summary of the invention
The poly- material resistance of deformation of existing heavy caliber space lunch device upsetting in forming process is big, closes up in order to solve by the present invention
Difficulty causes to process duration, reduces stock utilization, increases the problem of production cost, and then proposes that a kind of tubing becomes wall thickness
Undergauge rotary extrusion forming device and method.
The technical solution adopted by the present invention to solve the above technical problem is:
It includes front template, rotary squeezing cavity plate, die socket, rear mold that a kind of tubing, which becomes wall thickness undergauge rotary extrusion forming device,
Plate, moving core and extruding punch, front template and rear pattern plate are arranged in parallel, and it is convex that extruding is connected in the middle part of front template back end surface
Mould, the middle part of rear pattern plate front end face are embedded with die socket, and rotary squeezing cavity plate, extruding punch and rotation are provided in die socket
Extruding die is oppositely arranged, and the middle part on the inside of rotary squeezing cavity plate, moving core and servo-actuating device is arranged in moving core
Connection, moving core carry out axial feed and circumferential revolution by servo-actuating device.
A kind of tubing becomes wall thickness undergauge rotary extrusion forming method and includes the following steps:
Step 1: installation forming device: the rear pattern plate for installing die socket and rotary squeezing cavity plate is loaded on first sleeping
The front template for installing extruding punch is fixed on the pressure end of horizontal hydraulic machine by the fixing end of formula hydraulic press, then will be passed through
Induction heating and spray lubrication inoxidzable coating after tubing raw material be put into rotary squeezing cavity plate；
Step 2: start extrusion molding: opening horizontal hydraulic machine, gradually press to extruding punch, tubing raw material is carried out
The poly- material of upsetting, while moving core in axial direction proceeds to extruding punch and tubing under the driving of servo-actuating device first
The contact position of raw material, then servo-actuating device drives moving core revolution at a high speed, work of multiple type core assembly blocks in centrifugal force
It is rotated with lower outside expansion, the circular arc camber of type core assembly block applies radially outer pressure to tubing raw material, and moving core is complete
After extrusion molding at a position, extruding punch continues to press, while servo-actuating device drives moving core along axial direction side
To gradually withdrawing, by the revolving speed size of servo-actuating device adjustment, with the contraction or expansion of control type core assembly block, to regulate and control
The deformation of tubing raw material prevents corrugation and unstability in tubing raw material forming process, continues the poly- material of rotary squeezing tubing upsetting
It carries out, until squeezing upsetting reaches component desired size, realization is once-forming, and type core assembly block rotates the shape to be formed and becomes wall thickness
The inner tight of necking down component is bonded；
Step 3: restPose: after the upsetting forming for completing a tubing raw material, moving core is in servo-drive
The initial position of axial direction is returned under the control of mechanism, while horizontal hydraulic machine restPoses, remove forming tube.
The beneficial effects of the present invention over the prior art is:
It is an object of the invention to find a kind of efficient, quick, cheap tubing change wall thickness necking down rotary extrusion forming side
Method manufactures and designs intelligentized control method moving core system, to prepare large scale, heavy caliber, high performance steel space lunch device
Typical product, and expand its engineering for becoming wall thickness complex component in tubing such as high-strength alloy steel, high-strength magnesium alloy, high strength alumin ium alloys
Application in preparation.
The tubing product of different distortion amount, different wall thickness may be implemented by the expansion and contraction of the moving core of rotation
Forming preparation, while product, less without machining, stock utilization is substantially improved, and reduces process, greatly shortens process time, produces
Efficiency improves 40% or more.Other than high-strength alloy steel, which is also applied for the high-strength aluminium such as Al-Mg-Si-Cu system and closes
The preparation production of the high-strength magnesium alloys large scale, bigbore pipe fitting or Cylinder shape constructional element such as gold and Mg-Al-Zn system, while the technique
There is important engineering significance during the tubular-shaped structures part figuration manufacture of labyrinth.
Detailed description of the invention
Fig. 1 is the integrally-built schematic diagram of the present invention before tubing raw material 9 shapes；
Fig. 2 is the integrally-built schematic diagram of the present invention in 9 forming process of tubing raw material；
Fig. 3 is the overall structure diagram of moving core 6 in the present invention.
Specific embodiment
Specific embodiment 1: illustrating present embodiment, a kind of tubing change wall described in present embodiment in conjunction with Fig. 1 to Fig. 3
Thick undergauge rotary extrusion forming device includes front template 1, rotary squeezing cavity plate 2, die socket 3, rear pattern plate 4, moving core 6 and squeezes
Belling mould 8, front template 1 and rear pattern plate 4 are arranged in parallel, and extruding punch 8, rear pattern plate 4 are connected in the middle part of 1 back end surface of front template
The middle part of front end face is embedded with die socket 3, is provided with rotary squeezing cavity plate 2, extruding punch 8 and rotary squeezing in die socket 3
Cavity plate 2 is oppositely arranged, and the middle part of 2 inside of rotary squeezing cavity plate, moving core 6 and servo-actuating device is arranged in moving core 6
Connection, moving core 6 carry out axial feed and circumferential revolution by servo-actuating device.
Servo-actuating device includes servo step motor and turning motor in present embodiment, and turning motor passes through speed changer
It is connect with moving core 6, controls the revolution and revolving speed size of moving core 6, servo step motor passes through retarder control activity
The axial advancement and withdrawal of type core 6 and turning motor and speed changer.
Specific embodiment 2: illustrating present embodiment in conjunction with Fig. 1 to Fig. 3, moving core 6 described in present embodiment includes
Fixed disc 6-1, push-plate 6-4, central support shaft 6-5, multiple type core assembly block 6-2, multiple back support rod 6-3, multiple front supports
Bar 6-6, multiple rear connecting rod 6-7, multiple link block 6-8 and multiple front rod 6-9, central support shaft 6-5 level are inserted into
In rotary squeezing cavity plate 2, the front end and the middle part of fixed disc 6-1 rear end face of central support shaft 6-5 is vertical affixed, push-plate 6-4
It is sleeved on the outside of central support shaft 6-5, the rear end of central support shaft 6-5 is connect with servo-actuating device, the inner circle of push-plate 6-4
The excircle side wall of all side walls and central support shaft 6-5 is slidably connected, between fixed disc 6-1 and push-plate 6-4 along the circumferential direction
Multiple type core assembly block 6-2 are laid with, the end face outside of type core assembly block 6-2 is circular arc camber, the inside of each type core assembly block 6-2
The rear end face that end face passes through front support rod 6-6 and fixed disc 6-1 respectively is rotatablely connected, after each type core assembly block 6-2
The front end face that side end face passes through back support rod 6-3 and push-plate 6-4 respectively is rotatablely connected, each adjacent two type core assembly block 6-2
Between be respectively equipped with a link block 6-8, a rear connecting rod 6-7 and two front rod 6-9, the one of the front end link block 6-8
Side is rotatablely connected by a side of a front rod 6-9 and type core assembly block 6-2, and the other side of the front end link block 6-8 is logical
The adjacent side for crossing another front rod 6-9 and adjacent cores chunking 6-2 is rotatablely connected, after the rear end of link block 6-8 passes through
The front end of connecting rod 6-7 and push-plate 6-4 is rotatablely connected.The technical features not disclosed in this embodiment and specific embodiment one
It is identical.
Specific embodiment 3: illustrating present embodiment, a kind of tubing change wall described in present embodiment in conjunction with Fig. 1 to Fig. 3
Thick undergauge rotary extrusion forming device further includes controller and multiple pressure sensors, the inside difference of each type core assembly block 6-2
Equipped with a pressure sensor, pressure sensor and servo-actuating device are connect with controller respectively.It is not public in present embodiment
The technical characteristic opened is identical with embodiment two.
Specific embodiment 4: illustrate present embodiment in conjunction with Fig. 1 to Fig. 3, front support rod 6-6 described in present embodiment
Front end and the rear end face of fixed disc 6-1 are hinged, and the rear end of front support rod 6-6 and the inner side end of type core assembly block 6-2 are hinged, after
The front end of support rod 6-3 and the back end surface of type core assembly block 6-2 are hinged, the rear end of back support rod 6-3 and the front end face of push-plate 6-4
Hingedly.The technical features not disclosed in this embodiment are the same as the specific implementation mode 3.
Specific embodiment 5: illustrating present embodiment, the front end of present embodiment front rod 6-9 in conjunction with Fig. 1 to Fig. 3
By being hinged at for universal ball joint 6-10 and type core assembly block 6-2, the rear end of front rod 6-9 passes through universal ball joint 6-10
Hinged with the front end of link block 6-8, the rear end of link block 6-8 is cut with scissors by the front end of universal ball joint 6-10 and rear connecting rod 6-7
It connects, the rear end of rear connecting rod is hinged by universal ball joint 6-10 and the front end of push-plate 6-4.Undocumented skill in present embodiment
Art feature is identical as specific embodiment two, three or four.
Specific embodiment 6: illustrating present embodiment, a kind of tubing change wall described in present embodiment in conjunction with Fig. 1 to Fig. 3
Thick undergauge rotary extrusion forming device further includes cavity plate cushion block 5 and fixes sleeve 7, and cavity plate cushion block 5 is arranged in rotary squeezing cavity plate 2
Rear end and be inlaid in the middle part of die socket 3, the middle part of cavity plate cushion block 5 is vertically fitted with fixes sleeve 7, central support shaft 6-5
It is inserted into fixes sleeve 7.The technical features not disclosed in this embodiment are identical as specific embodiment five.
Specific embodiment 7: illustrating present embodiment, a kind of tubing change wall described in present embodiment in conjunction with Fig. 1 to Fig. 3
Thick undergauge rotary extrusion forming method includes the following steps:
Step 1: installation forming device: the rear pattern plate 4 for installing die socket 3 and rotary squeezing cavity plate 2 is loaded on first
The front template 1 for installing extruding punch 8 is fixed on the pressure end of horizontal hydraulic machine by the fixing end of horizontal hydraulic machine, then will
Tubing raw material 9 after by induction heating and spraying lubrication inoxidzable coating is put into rotary squeezing cavity plate 2；
Step 2: start extrusion molding: open horizontal hydraulic machine, gradually press to extruding punch 8, to tubing raw material 9 into
The poly- material of row upsetting, at the same moving core 6 in axial direction proceeded to first under the driving of servo-actuating device extruding punch 8 with
The contact position of tubing raw material 9, then servo-actuating device drive 6 revolution at a high speed of moving core, multiple type core assembly block 6-2 from
Expansion rotation, the circular arc camber of type core assembly block 6-2 apply radially outer pressure to tubing raw material 9 outward under the action of mental and physical efforts,
After the extrusion molding for completing a position, extruding punch 8 continues to press moving core 6, while servo-actuating device drives and lives
Ejector half core 6 is in axial direction gradually withdrawn, the revolving speed size adjusted by servo-actuating device, with control type core assembly block 6-2's
It shrinks or is unfolded, to regulate and control the deformation of tubing raw material 9, prevent corrugation and unstability in 9 forming process of tubing raw material, make to rotate
It squeezes the poly- material of tubing upsetting to continue, until squeezing upsetting reaches component desired size, realizes once-forming, type core assembly block 6-
The shape that 2 rotations are formed is bonded with the inner tight for becoming wall thickness necking down component；
Step 3: restPose: after the upsetting forming for completing a tubing raw material 9, moving core 6 drives in servo
The initial position of axial direction is returned under the control of motivation structure, while horizontal hydraulic machine restPoses, remove forming tube.
Specific embodiment 8: illustrate present embodiment in conjunction with Fig. 1 to Fig. 3, and in step 2 described in present embodiment, type core
Pressure suffered by pressure sensor moment monitor-type core assembly block 6-2 inside chunking 6-2, after eliminating upsetting corrugation, with
The progress of upsetting forming, pressure suffered by type core assembly block 6-2 are gradually increased, and when reaching setting value, pressure sensor is anti-by signal
It is fed to controller, controller issues instructions to servo-actuating device, and servo-actuating device is in axial direction withdrawn, and release upsetting is empty
Between, while adjusting the rotational speed of moving core 6, be unfolded with control type core assembly block 6-2 or shrinking, make rotary squeezing tubing upsetting
Poly- material continues, and so recycles, until squeezing upsetting reaches component desired size, realizes once-forming.In present embodiment
Undocumented technical characteristic is identical as specific embodiment seven.
Working principle
Tubing becomes wall thickness necking down rotary extrusion forming technique by horizontal hydraulic machine, by become wall thickness necking down rotary squeezing at
Shape dress is set, and in the poly- material of tubing upsetting, is applied radial support inside tubing by the moving core 6 that servo-drive rotates, is led to
It crosses load signal feedback and comes the contraction or expansion of intelligent control moving core 6, and then regulate and control tubing during poly- material closes up
Deformation, avoids the corrugation and unstability of tubing force transmission region, by the axial feed motion of moving core 6, makes rotary squeezing tubing upsetting
The lasting progress of the poly- material of forging reaches component desired size until squeezing upsetting, realizes and becomes the intelligent primary of wall thickness necking down Cylinder shape constructional element
Property precision form.
The present invention is characterized in that forming tubular product carries out on horizontal hydraulic machine, rotary squeezing cavity plate 2 is kept fixed and mentions
For radial compressive stress, during extruding punch 8 is axially loaded, the moving core 6 of axial feed is provided radial by expansion, rotation
Inner support, the movement of intelligentized control method moving core 6 may be implemented the deformation and wall thickness change of the different parts of tubing, realize and become wall
Thick necking down disposably shapes.By constantly adjust moving core 6 position and unfolded state gradually shape obtain dimensional accuracy compared with
Green that is high, haveing excellent performance becomes wall thickness necking down component.
The present invention becomes the component formings such as wall thickness necking down for the large scales such as steel space lunch device, heavy caliber.It is also applied for
Titanium alloy, copper alloy, aluminium alloy and magnesium alloy.
Claims (8)
1. a kind of tubing becomes wall thickness undergauge rotary extrusion forming device, it is characterised in that: a kind of tubing change wall thickness undergauge rotation
Turn extrusion molding apparatus include front template (1), rotary squeezing cavity plate (2), die socket (3), rear pattern plate (4), moving core (6) and
Extruding punch (8), front template (1) and rear pattern plate (4) are arranged in parallel, and it is convex that extruding is connected in the middle part of front template (1) back end surface
The middle part of mould (8), rear pattern plate (4) front end face is embedded with die socket (3), is provided with rotary squeezing cavity plate in die socket (3)
(2), extruding punch (8) is oppositely arranged with rotary squeezing cavity plate (2), and moving core (6) setting is on the inside of rotary squeezing cavity plate (2)
Middle part, moving core (6) connect with servo-actuating device, and moving core (6) carries out axial feed by servo-actuating device
With circumferential revolution.
2. a kind of tubing becomes wall thickness undergauge rotary extrusion forming device according to claim 1, it is characterised in that: the activity
Type core (6) includes fixed disc (6-1), push-plate (6-4), central support shaft (6-5), multiple type core assembly blocks (6-2), multiple rear branch
Strut (6-3), multiple front support rods (6-6), multiple rear connecting rods (6-7), multiple link blocks (6-8) and multiple front rods
(6-9), central support shaft (6-5) level are inserted into rotary squeezing cavity plate (2), the front end of central support shaft (6-5) and fixation
The middle part of disk (6-1) rear end face is vertically affixed, and push-plate (6-4) is sleeved on the outside of central support shaft (6-5), central support shaft
The rear end of (6-5) is connect with servo-actuating device, the inner circumferential side wall of push-plate (6-4) and the excircle of central support shaft (6-5)
Side walls connection, is along the circumferential direction laid with multiple type core assembly blocks (6-2) between fixed disc (6-1) and push-plate (6-4),
The end face outside of type core assembly block (6-2) is circular arc camber, and the inner side end of each type core assembly block (6-2) props up before passing through one respectively
The rear end face of strut (6-6) and fixed disc (6-1) are rotatablely connected, and the back end surface of each type core assembly block (6-2) passes through respectively
The front end face of one back support rod (6-3) and push-plate (6-4) are rotatablely connected, between each adjacent two type core assembly block (6-2) respectively
Equipped with a link block (6-8), a rear connecting rod (6-7) and two front rods (6-9), the one of the front end link block (6-8)
Side is rotatablely connected by a side of front rod (6-9) and type core assembly block (6-2), the front end link block (6-8) it is another
Side is rotatablely connected by the adjacent side of another front rod (6-9) and adjacent cores chunking (6-2), link block (6-8)
Rear end be rotatablely connected by the front end of rear connecting rod (6-7) and push-plate (6-4).
3. a kind of tubing becomes wall thickness undergauge rotary extrusion forming device according to claim 2, it is characterised in that: described one kind
It further includes controller and multiple pressure sensors, each type core assembly block (6-2) that tubing, which becomes wall thickness undergauge rotary extrusion forming device,
Inside be respectively equipped with a pressure sensor, pressure sensor and servo-actuating device are connect with controller respectively.
4. a kind of tubing becomes wall thickness undergauge rotary extrusion forming device according to claim 3, it is characterised in that: branch before described
The front end of strut (6-6) and the rear end face of fixed disc (6-1) are hinged, the rear end of front support rod (6-6) and type core assembly block (6-2)
Inner side end it is hinged, the front end of back support rod (6-3) and the back end surface of type core assembly block (6-2) are hinged, back support rod (6-3)
Rear end and push-plate (6-4) front end face it is hinged.
5. according to a kind of tubing change wall thickness undergauge rotary extrusion forming device of claim 2,3 or 4, it is characterised in that: preceding
The front end of connecting rod (6-9) is hinged at by universal ball joint (6-10) and type core assembly block (6-2's), front rod (6-9)
Rear end it is hinged by universal ball joint (6-10) and the front end of link block (6-8), the rear end of link block (6-8) passes through spherical ten thousand
Xiang Jie (6-10) and the front end of rear connecting rod (6-7) are hinged, and the rear end of rear connecting rod passes through universal ball joint (6-10) and push-plate
The front end of (6-4) is hinged.
6. a kind of tubing becomes wall thickness undergauge rotary extrusion forming device according to claim 5, it is characterised in that: described one kind
It further includes cavity plate cushion block (5) and fixes sleeve (7), cavity plate cushion block (5) setting that tubing, which becomes wall thickness undergauge rotary extrusion forming device,
Rotary squeezing cavity plate (2) rear end and be inlaid in the middle parts of die socket (3), the middle part of cavity plate cushion block (5) is vertically fitted with solid
Determine sleeve (7), central support shaft (6-5) is inserted into fixes sleeve (7).
7. a kind of tubing becomes wall thickness undergauge rotary extrusion forming method, it is characterised in that: described method includes following steps:
Step 1: installation forming device: the rear pattern plate (4) for installing die socket (3) and rotary squeezing cavity plate (2) is loaded first
In the fixing end of horizontal hydraulic machine, the front template (1) for installing extruding punch (8) is fixed on to the pressure end of horizontal hydraulic machine,
Then the tubing raw material (9) by induction heating and after spraying lubrication inoxidzable coating is put into rotary squeezing cavity plate (2)；
Step 2: start extrusion molding: open horizontal hydraulic machine, gradually press to extruding punch (8), to tubing raw material (9) into
The poly- material of row upsetting, while moving core (6) in axial direction proceeds to extruding punch under the driving of servo-actuating device first
(8) with the contact position of tubing raw material (9), then servo-actuating device drives moving core (6) revolution at a high speed, multiple type core groups
Block (6-2) expansion rotation outward under the influence of centrifugal force, the circular arc camber of type core assembly block (6-2) apply tubing raw material (9)
Radially outer pressure, moving core (6) is after the extrusion molding for completing a position, and extruding punch (8) continues to press, simultaneously
Servo-actuating device drives moving core (6) in axial direction gradually to withdraw, the revolving speed size adjusted by servo-actuating device,
With the contraction or expansion of control type core assembly block (6-2), to regulate and control the deformation of tubing raw material (9), prevent tubing raw material (9) from shaping
Corrugation and unstability in the process continue the poly- material of rotary squeezing tubing upsetting, until squeezing upsetting reaches component requirement ruler
Very little, realization is once-forming, and the shape that type core assembly block (6-2) rotation is formed is bonded with the inner tight for becoming wall thickness necking down component；
Step 3: restPose: after the upsetting forming for completing a tubing raw material (9), moving core (6) drives in servo
The initial position of axial direction is returned under the control of motivation structure, while horizontal hydraulic machine restPoses, remove forming tube.
8. a kind of tubing becomes wall thickness undergauge rotary extrusion forming method according to claim 7, it is characterised in that: the step
In two, pressure suffered by the internal pressure sensor moment monitor-type core assembly block (6-2) of type core assembly block (6-2) is eliminating upsetting
After forging corrugation, with the progress that upsetting shapes, pressure suffered by type core assembly block (6-2) is gradually increased, when reaching setting value, pressure
Signal feedback to controller, controller are issued instructions to servo-actuating device by sensor, and servo-actuating device is in axial direction
It withdraws, discharges upsetting space, while adjusting the rotational speed of moving core (6), be unfolded with control type core assembly block (6-2) or received
Contracting continues the poly- material of rotary squeezing tubing upsetting, so recycles, until squeezing upsetting reaches component desired size, realizes
It is once-forming.
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| CN201811599003.6A CN109848345B (en) | 2018-12-26 | 2018-12-26 | Wall-thickness-variable reducing rotary extrusion forming device and method for pipe |
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| US2932889A (en) * | 1955-07-20 | 1960-04-19 | United States Steel Corp | Pipe upsetting |
| JPH06339743A (en) * | 1993-05-31 | 1994-12-13 | Daido Steel Co Ltd | Die forging method for hard-to-work material |
| JP2004351487A (en) * | 2003-05-29 | 2004-12-16 | Calsonic Kansei Corp | Apparatus for modifying thickness of pipe |
| CN201333491Y (en) * | 2008-12-31 | 2009-10-28 | 衡阳华菱钢管有限公司 | Drill rod upsetting and thickening mould |
| CN101767173A (en) * | 2008-12-31 | 2010-07-07 | 衡阳华菱钢管有限公司 | Drill stem thickening process and thickening module |
| CN201609746U (en) * | 2009-12-24 | 2010-10-20 | 洛阳锐腾机械设备有限公司 | Horizontal hydraulic pipe end thickening device |
| CN104624694A (en) * | 2014-12-02 | 2015-05-20 | 中北大学 | Method for extruding inner transverse rib of cylindrical piece |
| CN108160793A (en) * | 2017-12-13 | 2018-06-15 | 航天特种材料及工艺技术研究所 | A kind of internal rolling equipment |
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| CN109848345B (en) | 2020-06-09 |
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