CN102974633B - Swell-shrink drawing molding process and device for reducing pipes - Google Patents
Swell-shrink drawing molding process and device for reducing pipes Download PDFInfo
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- CN102974633B CN102974633B CN201210588572.7A CN201210588572A CN102974633B CN 102974633 B CN102974633 B CN 102974633B CN 201210588572 A CN201210588572 A CN 201210588572A CN 102974633 B CN102974633 B CN 102974633B
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- 238000000465 moulding Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title abstract description 32
- 238000004513 sizing Methods 0.000 claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims abstract description 7
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 15
- 230000003292 diminished effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000000137 annealing Methods 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000010622 cold drawing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 208000004141 microcephaly Diseases 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to metal pipe processing, in particular to a swell-shrink drawing molding process and a device for reducing pipes. The process comprises the following steps: Step 1, necking: a pipe is installed on a rack; one end of the pipe is fixed through a pushing seat, the middle part of the pipe is supported through a protective sleeve installed on a supporting seat, and then the other one of the pipe is necked through a necking and pushing head; Step 2, annealing: the necked pipe is annealed through an annealing device; Step 3, drawing: the pipe treated by the step 2 is drawn through a drawing chuck to form a reducing pipe blank; Step 4, annealing: the reducing pipe blank is annealed through the annealing device; and Step 5, sizing, determining wall thickness and drawing: the reducing pipe blank treated by the Step 4 is subjected to the sizing, determining wall thickness and drawing treatment through the drawing chuck to form a reducing pipe finished-product. Due to the structure, the process and the device have the advantages that the processing quality and precision of the reducing pipe is increased, and the production of relatively long and thin reducing pipes is realized.
Description
Technical field
The present invention relates to metal pipe material processing, specifically a kind of reduced pipe quality precision and breathing drawing moulding process and the device that can produce relative elongated reduced pipe of improving.
Background technology
So-called reduced pipe, is commonly called as concentric reducer, is a kind of pipe fitting for pipeline reducing diameter place.Applying maximum is on the pipeline in chemical plant.Conventionally be divided into Concentric Reducers and eccentric reducer.The material of reduced pipe comprises stainless steel reduced pipe and steel alloy reduced pipe, No. 20 firm reduced pipes etc.
Reduced pipe has national standard, as < < steel butt seamless pipe > > GB/T12459-2005, < < steel plate butt-welding pipe fitting > processed > GB/T13401-2005 etc.
The caliber specification of reduced pipe is from 25(major part) * 15(microcephaly) to 1500(major part) * 1200(microcephaly), the length the shortest of reduced pipe is 51 millimeters, the longest 610 millimeters.
Reduced pipe adopts undergauge moulding process, hole enlargement moulding process, punch forming process conventionally.
The reducing formation technique of reduced pipe is that the pipe equating with reduced pipe outside diameter is put into finishing die, by the compacting along pipe axial direction, makes metal move and shrink shaping along die cavity.According to the size of reduced pipe reducing, be divided into once compressing or repeatedly compressing.
It is to adopt the pipe that is less than reduced pipe outside diameter that hole enlargement is shaped, and with interior punch die, along the hole enlargement of pipe internal diameter, is shaped.Expanding technology mainly solves reducing reduced pipe bigger than normal and is difficult for by the situation of reducing formation, sometimes according to material and product shaping needs, the method for hole enlargement and undergauge is merged and is used.
Except using steel pipe to produce reduced pipe for raw material, to the reduced pipe of part specification also available steel plate adopt process for stamping and forming to produce.Stretch the punch die shape use with reference to reduced pipe inner surface size design, with punch die by the steel plate punched stretch forming after blanking.
The cold drawing of prior art is a kind of traditional flow of metal processing technology, is widely used in the stretching of deformed bar, the drawing of iron and steel copper wires, bar, tubing etc.The object of this stretching drawing is to obtain high-precision metal material, as cold drawn aluminum pipe, can produce best bright finish, the high Precision Aluminium tubing of high dimensional accuracy; Obtain the diversified bar of shape specification, as produce six square steel rods, six side's aluminium bars, six copper square bars; Obtain high economic benefit, save process time, reduce machining expense, save metal material, as cold drawn tooth base etc.Conventionally the equivalent diameter of material that cold drawing draws can be very not large, and draw ratio is large especially.This cold-drawing process, when to tube-drawing, can only carry out the drawing of single bore, cannot realize the drawing of reduced pipe.
The process of prior art and equipment cannot be processed relatively elongated reduced pipe.
Summary of the invention
The object of this invention is to provide a kind of reduced pipe quality precision and the breathing drawing forming method that can produce relative elongated reduced pipe of improving.
For realizing the technical scheme that above-mentioned purpose of the present invention adopts, be: a kind of breathing drawing moulding process of reduced pipe, is characterized in that: this technique comprises
First step necking down: tubing is arranged in frame, and one end of tubing is fixing by pushing seat, and middle part is supported by the protective sleeve being arranged on supporting seat, then head is pushed to by necking down in other one end of tubing and carries out necking down;
Second step annealing: the tubing after necking down is annealed by annealing device;
The 3rd step drawing: the tubing after second step being processed by drawing chuck carries out drawing and forms reduced pipe blank;
The 4th step annealing: reduced pipe blank is annealed by annealing device;
The 5th step expander, sizing is determined wall thickness drawing: the reduced pipe blank after by drawing chuck, the 4th step annealing being processed carries out expander, and sizing is determined wall thickness drawing processing, forms reduced pipe finished product.
The crudy precision that has improved high reduced pipe by said method, has realized the production to relatively elongated reduced pipe, concrete and can say it is can manufacture in 150 millimeters of pipe diameters, and 4 meters of length are with interior tubing.
Another object of the present invention is to provide a kind of reduced pipe quality precision and the breathing drawing manufacturing installation that can produce relative elongated reduced pipe of improving.
For realizing the technical scheme that above-mentioned purpose of the present invention adopts, be: a kind of breathing drawing shaped device of reduced pipe, wherein this device comprises
Frame (1) and Hydraulic Station (2), what be fixed on frame (1) one end pushes baffle plate (3), is fixed on to push to push seat (4) on baffle plate (3), and one end of tubing (5) is fixed on pushes in seat (4);
The other end of frame (1) has dynamic model seat (6), dynamic model seat (6) moves to the termination of tubing (5) along guide pillar (8) under pipe box (7) promotes, guide pillar (8) is fixed on the both sides of frame (1), one end of this pipe box (7) is connected with dynamic model seat (6), and the other end of pipe box (7) is fixed on hydraulic cylinder piston rod (9) termination of being controlled by Hydraulic Station (2);
By being arranged on necking down on dynamic model seat (6), pushing head tubing (5) is carried out to necking down, this necking down is pushed head and is comprised the die sleeve (10) being fixed on dynamic model seat (6), be arranged on the necking down mould (11) in die sleeve (10), tubing (5) is through necking down mould (11), by pipe box (7), promote dynamic model seat (6), tubing (5) is pushed distortion in necking down mould (11), the other end diameter of tubing (5) is diminished and realize necking down;
Above-mentioned necking down is pushed and is arranged on after unloading on a driven die holder (6) fixedly on die holder (12), fixedly die holder (12) is positioned at the bottleneck of tubing (5), fixedly die holder (12) is fixed on frame (1) above, realizes and at tubing (5) bottleneck, tubing (5) being positioned, by being arranged on the necking down position of the drawing chuck clamping tubing (5) on dynamic model seat (6), carry out drawing, this drawing chuck comprises the core print I (13) being fixed as one with dynamic model seat (6), core print I (13) is outside equipped with dynamic model cover (14), dynamic model cover (14) is fixed on dynamic model seat (6), a pair of card lobe (15) is by symmetrical being arranged in dynamic model cover (14), this card lobe (15) outer wall has tapering, inwall has sharp annular tooth, card lobe (15) forms drawing mould with core print I (13), between card lobe (15) and core print I (13), there is the gap that the tube wall of confession tubing (5) penetrates, card lobe (15) is clamped in the tube wall of tubing (5) in this gap with core print I (13), at dynamic model cover (14) outer wall, be provided with the card lobe clutch (16) of a control card lobe (15) and tubing (5) clutch, after card lobe clutch (16) control card lobe (15) clamps the tube wall of tubing (23) with core print I (13), dynamic model seat (6) with pipe box (7) to moving away from tubing (5) necking down port end, the drawing deformation of realization to tubing (5), makes tubing (5) form reduced pipe blank,
The above-mentioned necking down being fixed on fixing die holder (12) is pushed to head and unloads, at the reducing place of reduced pipe blank by being fixed on sizing die (28) location on fixing die holder (12); Plug (17) is penetrated from the heavy caliber end of reduced pipe blank, one end of plug (17) is fixed on and pushes on baffle plate (3) from the small-caliber end of reduced pipe blank passes, the other end of plug (17) has core print II (29), and core print II (29) is limited on the inwall at tubing (5) reducing place; Change the drawing mould of above-mentioned drawing chuck, by the drawing mould after changing, reduced pipe blank heavy caliber end is clamped, dynamic model seat (6) with pipe box (7) to moving away from reduced pipe blank heavy caliber end, tubing (5) moves with the drawing chuck one being fixed on dynamic model seat (6), small-bore section of internal diameter of tubing (5) be expander under core print II (29) effect of plug (17), small-bore section of external diameter of tubing (5), by the spacing moulding of sizing die (28) being fixed on fixing die holder (12), realized the sizing of small-bore section of reduced pipe blank determined to wall thickness.
By said structure, the crudy precision that device shown in the present has improved high reduced pipe, has realized the production to relatively elongated reduced pipe, concrete and can say it is can manufacture in 150 millimeters of pipe diameters, and 4 meters of length are with interior tubing.
What said method and device were produced can be widely used in the demands such as light rail vehicle, railcar or high ferro vehicle
Accompanying drawing explanation
The non-limiting embodiment that the present invention can provide by accompanying drawing further illustrates.
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 for the present invention push seat structural representation.
Accompanying drawing 3 for necking down of the present invention push head structural representation.
Accompanying drawing 4 is the structural representation of drawing chuck of the present invention.
Accompanying drawing 5 be in accompanying drawing 4 A to structural representation.
Structural representation when accompanying drawing 6 is the drawing of apparatus of the present invention draw.
Accompanying drawing 7 is determined wall thickness drawing structure schematic diagram for apparatus of the present invention sizing.
In figure: 1, frame; 2, Hydraulic Station; 3, push baffle plate; 4, push seat; 5, tubing; 6, dynamic model seat; 7, pipe box; 8, guide pillar; 9, hydraulic cylinder piston rod; 10, die sleeve; 11, necking down mould; 12, fixing die holder; 13, core print I; 14, dynamic model cover; 15, card lobe; 16, card lobe clutch; 17, plug; 18, rotating shaft; 19, spring; 21, Long-distance Control bar; 22, set bolt; 23, clamp; 24, bolt; 25, supporting seat; 26, overcoat; 27, protective sleeve; 28, sizing die; 29, core print II.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
A breathing drawing forming method for reduced pipe, is characterized in that: this technique comprises
First step necking down: tubing is arranged in frame, and one end of tubing is fixing by pushing seat, and middle part is supported by the protective sleeve being arranged on supporting seat, then head is pushed to by necking down in other one end of tubing and carries out necking down;
Second step annealing: the tubing after necking down is annealed by annealing device;
The 3rd step drawing: the tubing after second step being processed by drawing chuck carries out drawing and forms reduced pipe blank;
The 4th step annealing: reduced pipe blank is annealed by annealing device;
The 5th step expander, sizing is determined wall thickness drawing: the reduced pipe blank after by drawing chuck, the 4th step annealing being processed carries out expander, and sizing is determined wall thickness drawing processing, forms reduced pipe finished product.The undergauge moulding process of prior art, hole enlargement moulding process and punch forming process cannot be processed into reduced pipe by relative tubing, yet relative tubing can be processed into reduced pipe by above-mentioned technique, and have improved the crudy precision of high reduced pipe.Concrete and can say it is can manufacture in 150 millimeters of pipe diameters, 4 meters of length are with interior tubing.
For further improving the quality of bottleneck, to improve the quality precision of reduced pipe, in above-described embodiment, preferably: described first step necking down and second step annealing alternately multi-pass are processed; In described first step necking down, the necking down mould that head is pushed in a necking down is once changed in every necking down.
Quality while determining wall thickness for further improving drawing and sizing, to improve the quality precision of reduced pipe, in above-described embodiment, preferably: described the 3rd step drawing and the 4th step annealing are alternately multi-pass processing; In described the 3rd step drawing, the drawing mould of a drawing chuck is once changed in every drawing; The drawing mould that last passage is used pulls to the internal diameter of tubing and external diameter to be less than design load.
In above-described embodiment, preferably: during described annealing, the temperature in annealing device stove is even, the temperature difference is no more than 2 ℃; The strict control heat time, guarantee burning, material structure changes evenly; Annealing finishes, and uses machine oil cleaning material, makes tubing surfaces externally and internally without the grains of sand.
Referring to accompanying drawing 1 to 7, the breathing drawing shaped device of the reduced pipe in accompanying drawing, wherein this device comprises
Frame 1 and Hydraulic Station 2, what be fixed on frame 1 one end pushes baffle plate 3, is fixed on to push to push seat 4 on baffle plate 3, and one end of tubing 5 is fixed on pushes in seat 4;
The other end of frame 1 has dynamic model seat 6, dynamic model seat 6 moves to the termination of tubing 5 along guide pillar 8 under pipe box 7 promotes, guide pillar 8 is fixed on the both sides of frame 1, and one end of this pipe box 7 is connected with dynamic model seat 6, and the other end of pipe box 7 is fixed on hydraulic cylinder piston rod 9 terminations of being controlled by Hydraulic Station 2;
By being arranged on necking down on dynamic model seat 6, pushing head tubing 5 is carried out to necking down, this necking down is pushed head and is comprised the die sleeve 10 being fixed on dynamic model seat 6, be arranged on the necking down mould 11 in die sleeve 10, tubing 5 is through necking down mould 11, by pipe box 7, promote dynamic model seat 6, tubing 5 is pushed distortion in necking down mould 11, the other end diameter of tubing 5 is diminished and realize necking down; (necking down of above-mentioned technical process just adopts this structure to realize).
Above-mentioned necking down is pushed and is arranged on after unloading on a driven die holder 6 fixedly on die holder 12, and fixedly die holder 12 is positioned at the bottleneck of tubing 5, and fixedly die holder 12 is fixed in frame 1, realizes and at tubing 5 bottlenecks, tubing 5 being positioned, by being arranged on the necking down position of the drawing chuck clamping tubing 5 on dynamic model seat 6, carry out drawing, this drawing chuck comprises the core print I 13 being fixed as one with dynamic model seat 6, core print I 13 is outside equipped with dynamic model cover 14, dynamic model cover 14 is fixed on dynamic model seat 6, a pair of card lobe 15 is by symmetrical being arranged in dynamic model cover 14, these card lobe 15 outer walls have tapering, inwall has sharp annular tooth, card lobe 15 forms drawing mould with core print I 13, between card lobe 15 and core print I 13, there is the gap that the tube wall of confession tubing 5 penetrates, card lobe 15 is clamped in the tube wall of tubing 5 in this gap with core print I 13, at dynamic model, overlap the card lobe clutch 16 that 14 outer walls are provided with a control card lobe 15 and tubing 5 clutches, after card lobe clutch 16 control card lobes 15 clamp the tube wall of tubing 5 with core print I 13, dynamic model seat 6 to moving away from tubing 5 necking down port end, is realized the drawing deformation to tubing 5 with pipe box 7, makes tubing 5 form reduced pipe blank, (above-mentioned technical process from reducing drawing, be exactly to realize by this structure).
The above-mentioned necking down being fixed on fixing die holder 12 is pushed to head and unload, at the reducing place of reduced pipe blank, by the sizing die 28 being fixed on fixing die holder 12, locate; Plug 17 is penetrated from the heavy caliber end of reduced pipe blank, and one end of plug 17 is fixed on and pushes on baffle plate 3 from the small-caliber end of reduced pipe blank passes, and the other end of plug 17 has core print II 29, and core print II 29 is limited on the inwall at tubing 5 reducing places; Change the drawing mould of above-mentioned drawing chuck, by the drawing mould after changing, reduced pipe blank heavy caliber end is clamped, dynamic model seat 6 with pipe box 7 to moving away from reduced pipe blank heavy caliber end, tubing 5 moves with the drawing chuck one being fixed on dynamic model seat 6, small-bore section of internal diameter of tubing 5 be expander under core print II 29 effects of plug 17, small-bore section of external diameter of tubing 5, by the spacing moulding of sizing die 28 being fixed on fixing die holder 12, realized the sizing of small-bore section of reduced pipe blank determined to wall thickness.In this embodiment, tubing 5 by steady pin be fixed on push seat 4 in, necking down push head the necking down mould 11 that adopts according to the design amount of pushing, there are a plurality of necking down moulds 11, every necking down is pushed and is changed successively a necking down mould 11; The card lobe 15 of drawing chuck is used as drawing mould with the drawing mould structure that core print 15 forms, this mould structure is also determined the drawing mould use of wall thickness as sizing simultaneously, according to design drawing amount and sizing, determine the design drawing amount of wall thickness and determine drawing mould number, according to drawing mould number, carry out the drawing of multi-pass, to realize quality and the precision that improves reduced pipe finished product.In this embodiment, actual is by necking down, to push head, drawing chuck and plug 17 cooperations to realize tubing 5 necking downs, drawing and expander formation moulding reduced pipe.(the 5th step expander of above-mentioned technical process, sizing is determined wall thickness drawing and realized by this structure).
For ease of the control operation that tubing 5 is firmly grasped, in above-described embodiment, preferably: described card lobe clutch 16 comprises the rotating shaft 18 being arranged on card lobe clutch 16 and penetrates the driving lever in spring 19, this spring 19 is positioned at card lobe clutch 16 outer walls, by adjusting driving lever, stir the clutch of card lobe 15 and tubing 5, when card lobe clutch 16 pushes away to the right, card lobe is just toward moving left, at this moment, piston rod 9 traction pipe boxes 7 drive dynamic model seat 6 to move right, dynamic model seat 6 drives dynamic model cover 14 to move right, dynamic model cover 14 gives card lobe 15 1 radial pressures, card lobe 15 is along with dynamic model seat 6 moves right, dynamic model overlaps the outer wall that 14 inwalls block card lobe 15 inflexibly, the annular tooth of blocking lobe 15 gets one's teeth into tubing 5, in tubing 5, there is again core print I 13 to head on, tubing 5 is capable, by the pull-up to the right of drawing chuck, carried out drawing deformation.
For ease of Long-distance Control card lobe clutch 16, in above-described embodiment, preferably: described card lobe clutch 16 tops are provided with Long-distance Control bar 21.
For ease of assembling, in above-described embodiment, preferably:, will push seat 4 and push baffle plate 3 and be fixed as one successively through pushing seat 4, pushing baffle plate 3 and clamp 23 by set bolt 22.
For ease of assembling, in above-described embodiment, preferably: described core print I 13 is fixed as one by bolt 24 and dynamic model seat 6.
Because tubing 5 is relatively long; under powerful hydraulic thrust; pipe can be pressed and collapsed or bend bent; the middle part of pipe is weak link, therefore, and in above-described embodiment; preferably: at the middle part of tubing 5, be provided with the supporting seat 25 that prevents tubing 5 distortion; supporting seat 25 is fixed in frame 1, and overcoat 26 is installed on supporting seat 25, and protective sleeve 27 is housed in overcoat 26.By this structure, effectively prevent that tubing 5 from forming in moulding reduced pipe process and being out of shape at necking down, drawing and expander, reduce scrappage, reduce production costs.In this embodiment, supporting seat 25 can fixedly installed overcoat 26 on die holder 12 by fixedly die holder 12 is alternative, and in overcoat 26 built-in protectives cover 27 protections that realize at tubing 5, in actual use, supporting seat 25 is a plurality of, is distributed on the middle part of tubing 5.
In said structure, the breathing drawing shaped device of same reduced pipe, tubing 5 is made in reduced pipe process, has effectively been realized necking down, drawing and expander, simultaneously by above-mentioned five step formula techniques, realize the processing to tubing 5, improved quality and the precision of reduced pipe finished product.
Referring to accompanying drawing 7, tubing 5 shown in accompanying drawing 7 is exactly the reduced pipe of moulding, will after small-bore section of expander, be just moulding reduced pipe.
Obviously, all embodiment of foregoing description are a part of embodiment of the present invention, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the category of the present invention's protection.
In sum, the present invention has improved the crudy precision of reduced pipe, has realized the production to relatively elongated reduced pipe.
Claims (6)
1. a breathing drawing shaped device for reduced pipe, is characterized in that: this device comprises
Frame (1) and Hydraulic Station (2), what be fixed on frame (1) one end pushes baffle plate (3), is fixed on to push to push seat (4) on baffle plate (3), and one end of tubing (5) is fixed on pushes in seat (4);
The other end of frame (1) has dynamic model seat (6), dynamic model seat (6) moves to the termination of tubing (5) along guide pillar (8) under pipe box (7) promotes, guide pillar (8) is fixed on the both sides of frame (1), one end of this pipe box (7) is connected with dynamic model seat (6), and the other end of pipe box (7) is fixed on hydraulic cylinder piston rod (9) termination of being controlled by Hydraulic Station (2);
By being arranged on necking down on dynamic model seat (6), pushing head tubing (5) is carried out to necking down, this necking down is pushed head and is comprised the die sleeve (10) being fixed on dynamic model seat (6), be arranged on the necking down mould (11) in die sleeve (10), tubing (5) is through necking down mould (11), by pipe box (7), promote dynamic model seat (6), tubing (5) is pushed distortion in necking down mould (11), the other end diameter of tubing (5) is diminished and realize necking down;
Above-mentioned necking down is pushed and is arranged on after unloading on a driven die holder (6) fixedly on die holder (12), fixedly die holder (12) is positioned at the bottleneck of tubing (5), fixedly die holder (12) is fixed on frame (1) above, realizes and at tubing (5) bottleneck, tubing (5) being positioned, by being arranged on the necking down position of the drawing chuck clamping tubing (5) on dynamic model seat (6), carry out drawing, this drawing chuck comprises the core print I (13) being fixed as one with dynamic model seat (6), core print I (13) is outside equipped with dynamic model cover (14), dynamic model cover (14) is fixed on dynamic model seat (6), a pair of card lobe (15) is by symmetrical being arranged in dynamic model cover (14), this card lobe (15) outer wall has tapering, inwall has sharp annular tooth, card lobe (15) forms drawing mould with core print I (13), between card lobe (15) and core print I (13), there is the gap that the tube wall of confession tubing (5) penetrates, card lobe (15) is clamped in the tube wall of tubing (5) in this gap with core print I (13), at dynamic model cover (14) outer wall, be provided with the card lobe clutch (16) of a control card lobe (15) and tubing (5) clutch, after card lobe clutch (16) control card lobe (15) clamps the tube wall of tubing (5) with core print I (13), dynamic model seat (6) with pipe box (7) to moving away from tubing (5) necking down port end, the drawing deformation of realization to tubing (5), makes tubing (5) form reduced pipe blank,
The above-mentioned necking down being fixed on fixing die holder (12) is pushed to head and unloads, at the reducing place of reduced pipe blank by being fixed on sizing die (28) location on fixing die holder (12); Plug (17) is penetrated from the heavy caliber end of reduced pipe blank, one end of plug (17) is fixed on and pushes on baffle plate (3) from the small-caliber end of reduced pipe blank passes, the other end of plug (17) has core print II (29), and core print II (29) is limited on the inwall at tubing (5) reducing place; Change the drawing mould of above-mentioned drawing chuck, by the drawing mould after changing, reduced pipe blank heavy caliber end is clamped, dynamic model seat (6) with pipe box (7) to moving away from reduced pipe blank heavy caliber end, tubing (5) moves with the drawing chuck one being fixed on dynamic model seat (6), small-bore section of internal diameter of tubing (5) be expander under core print II (29) effect of plug (17), small-bore section of external diameter of tubing (5), by the spacing moulding of sizing die (28) being fixed on fixing die holder (12), realized the sizing of small-bore section of reduced pipe blank determined to wall thickness.
2. the breathing drawing shaped device of reduced pipe according to claim 1, it is characterized in that: described card lobe clutch (16) comprises the rotating shaft (18) being arranged on card lobe clutch (16) and penetrates the driving lever in spring (19), this spring (19) is positioned at card lobe clutch (16) outer wall, by adjusting driving lever, stir the clutch of card lobe (15) and tubing (5), when card lobe clutch (16) pushes away to the right, card lobe is just toward moving left, at this moment, piston rod (9) traction pipe box (7) drives dynamic model seat (6) to move right, dynamic model seat (6) drives dynamic model cover (14) to move right, dynamic model cover (14) gives card lobe (15) radial pressures, card lobe (15) is along with dynamic model seat (6) moves right, dynamic model cover (14) inwall blocks the outer wall of card lobe (15) inflexibly, the annular tooth of blocking lobe (15) gets one's teeth into tubing (5), in tubing (5), there is again core print I (13) to head on, tubing (5) is capable, by the pull-up to the right of drawing chuck, carried out drawing deformation.
3. according to the breathing drawing shaped device of reduced pipe described in claim 1 or 2, it is characterized in that: described card lobe clutch (16) top is provided with Long-distance Control bar (21).
4. the breathing drawing shaped device of reduced pipe according to claim 1, it is characterized in that: by set bolt (22), successively through pushing seat (4), pushing baffle plate (3) and clamp (23), will push (4) and push baffle plate (3) and be fixed as one.
5. the breathing drawing shaped device of reduced pipe according to claim 1, is characterized in that: described core print I (13) is fixed as one by bolt (24) and dynamic model seat (6).
6. the breathing drawing shaped device of reduced pipe according to claim 1; it is characterized in that: at the middle part of tubing (5), be provided with the supporting seat (25) that prevents tubing (5) distortion; supporting seat (25) is fixed in frame (1); overcoat (26) is installed on supporting seat (25), protective sleeve (27) is housed in overcoat (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210588572.7A CN102974633B (en) | 2012-12-31 | 2012-12-31 | Swell-shrink drawing molding process and device for reducing pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210588572.7A CN102974633B (en) | 2012-12-31 | 2012-12-31 | Swell-shrink drawing molding process and device for reducing pipes |
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| Publication Number | Publication Date |
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| CN102974633A CN102974633A (en) | 2013-03-20 |
| CN102974633B true CN102974633B (en) | 2014-08-20 |
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|---|---|---|---|---|
| CN114505394B (en) * | 2022-03-08 | 2023-12-22 | 深圳市吉百顺科技有限公司 | Production and processing technology of high-precision inner wall reducing pipe |
| CN118144344B (en) * | 2024-05-11 | 2024-07-30 | 南京中鸿易工程科技有限公司 | Method for preparing isostatic pressing steel lining Polytetrafluoroethylene (PTFE) pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2134242Y (en) * | 1991-08-10 | 1993-05-26 | 李晓琳 | Hydraulic automatic machine for drawing inequal wall thickness tube |
| CN1347772A (en) * | 2001-02-26 | 2002-05-08 | 陈拇丁 | Making process of pipe with unequal wall thickness |
| CN1234480C (en) * | 2003-10-20 | 2006-01-04 | 广州冠华金属精工制造有限公司 | Method and apparatus for manufacturing reducing pipe |
| US7114362B2 (en) * | 2004-03-27 | 2006-10-03 | George A. Mitchell Company | Method of making metal workpiece |
| US7290424B2 (en) * | 2004-09-16 | 2007-11-06 | Lone Star Steel Company, L.P. | Push bench method for manufacturing small diameter tubing |
| JP5430159B2 (en) * | 2009-01-28 | 2014-02-26 | 日新製鋼株式会社 | Manufacturing method of different diameter steel pipe |
| CN101537436A (en) * | 2009-04-14 | 2009-09-23 | 四川泛华航空仪表电器厂 | Method for processing reducer pipe by integral cold drawing molding |
| CN203030656U (en) * | 2012-12-31 | 2013-07-03 | 刘选萍 | Reducing pipe expansion drawing forming device |
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