CN101700537B - Thin-wall high temperature alloy tubing simulation extrusion device - Google Patents
Thin-wall high temperature alloy tubing simulation extrusion device Download PDFInfo
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- CN101700537B CN101700537B CN2009102376780A CN200910237678A CN101700537B CN 101700537 B CN101700537 B CN 101700537B CN 2009102376780 A CN2009102376780 A CN 2009102376780A CN 200910237678 A CN200910237678 A CN 200910237678A CN 101700537 B CN101700537 B CN 101700537B
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Abstract
The invention discloses a thin-wall high temperature alloy tubing simulation extrusion device, belonging to tubing thermal-extrusion field. The device comprises a standard die set with a guiding device, and a simulation tubing thermal-extrusion mould which is arranged on the standard die set with the guiding device, the standard die set comprises an upper die holder, a lower die holder, a guide pillar and a guide bush, one end of the guide bush is connected with the upper die holder, the guide post is connected with the lower die holder, and the other end of the guide post is sheathed in the guide bush and can move along the guide bush up and down. The simulation tubing thermal-extrusion mould comprises an extrusion shaft, an extrusion needle, an extrusion pad, a positioning frame, an extrusion container inner lining, an extrusion container outer lining, a die cushion, a cushion block and an extrusion die. The device of the invention has good popularity; the guide post and the guide bush are adopted, the die cushion and the extrusion container have positioning ring coordination, the extrusion needle and the extrusion pad have guide coordination, good alignment, and convenient and flexible use; the time consumption of experimental process is short, the efficiency is high, the material use ratio is high and the cost is low.
Description
Technical field
The invention belongs to the tubing hot extrusion field in the machining, relate to a kind of thin-wall high temperature alloy tubing simulation extrusion device.
Background technology
Advantages such as high temperature alloy pipe has intensity height under the high temperature, and is anti-oxidant, anticorrosive are widely used in industrial circles such as Aeronautics and Astronautics aircraft, generating, rocket engine, nuclear reactor, petrochemical industry.But high-temperature alloy material is owing to the intensity height, and material flowability is poor, the hot processing temperature narrow range, and according to existing manufacturing technique, the difficulty that often is shaped during actual high temperature alloy pipe hot extrusion is produced, product percent defective height.Therefore need measure the flow of metal technological parameter in the high temperature alloy pipe production, the high-temperature stream varying stress under the more different process combination optimizes processing parameter.Owing to there is not special experimental provision to be used to study the thin-wall metal tube hot extrusion, so the hot extrusion technique in the practice is explored and optimized all is to carry out on the large-size extruder in factory, though resulting experimental result can be directly used in to instruct and produce, but its experiment preparatory period is long, need expend a large amount of manpower and materials, the experimental cost height.
Summary of the invention
The object of the present invention is to provide a kind of thin-wall high temperature alloy tubing simulation extrusion device, adopt the simulation squeeze test, for industrial production provides process parameter optimizing scheme accurately.
A kind of thin-wall high temperature alloy tubing simulation extrusion device, this simulation extrusion device are divided into two parts, and the one, the standard die set of guider is arranged, the 2nd, the mould of simulation tubing hot extrusion.Standard die set comprises upper bolster, die shoe, guide pillars and bushes, and an end of guide pin bushing is connected with upper bolster, and guide pillar is connected with die shoe, and the guide pillar other end is socketed in the guide pin bushing, can move up and down along guide pin bushing; The simulative tube material hot-extrusion mold comprises extrusion axis, extruding pin, dummy block, locating rack, recipient liner, recipient outer lining, die-cushion, cushion block and extrusion die between die shoe and upper bolster;
Extrusion axis is a multidiameter, and the multidiameter upper end is connected and fixed with upper bolster, and the lower end connects the extruding pin;
The recipient liner is no round-ended cylinder shape, be positioned at extrusion axis with the extruding pin be connected the part the periphery, the lower end is used to hold glass isolator and high temperature blank, be disposed with dummy block and graphite pads from top to bottom in high temperature blank upper end, recipient liner outer wall connects the recipient outer lining, the upper end of recipient outer lining and upper side have ring groove and annular steps, and lower end and lower end side have ring groove and the annular steps with the upper end symmetry;
Extrusion die is a conical die, inside is provided with conical through-hole, the die-cushion middle part is provided with circular hole, the upper end is provided with round ring boss, round ring boss cooperates with the ring groove of recipient outer lining lower end, and extrusion die is fixedly connected in the circular hole at die-cushion middle part, in the position of the corresponding conical through-hole of die-cushion, through hole B is set, and the extruding pin is aimed at the centre of extrusion die; Have a through hole A on the described die shoe, through hole A upper end is provided with detent, and the die-cushion bottom is arranged in the detent of die shoe;
Cushion block is fixed on the periphery of die-cushion, and upper surface is provided with the locating ring of annular groove, and lower surface is fixedlyed connected with die shoe; Locating rack is the no round-ended cylinder shape of hollow, is arranged on the periphery of recipient outer lining, and the upper end cooperates with annular steps, and the lower end cooperates with locating ring, and locating rack is fixedlyed connected with cushion block; Between locating rack and the recipient outer lining, between cushion block and the die-cushion induction coil is set.
The invention has the advantages that:
(1) versatility is good, and this simulation extrusion device has the standard die set of guider, therefore can be installed on the extruder, also can carry out the extrusion process simulated test on general forcing press or hydraulic press simultaneously;
(2) good to neutrality, owing to adopted guide pillar, guide pin bushing structure, die-cushion and recipient have the cooperation of locating ring again simultaneously, and extruding pin and dummy block also have guiding and cooperate, so a whole set of mould good to neutrality, be difficult for during extruding eccentric, the yield rate height;
(3) mould of simulation tubing of the present invention hot extrusion is installed on the standard die set, and can change extrusion die and extruding pin according to different tubing specifications, and is therefore easy to use, flexible; The present invention not only can simulate the extruding of high temperature alloy pipe, can also simulate the process of other metals extrude tubes under different process conditions, so the scope of application is wide;
(5) this apparatus structure is simple and quick and easy for installation, and the experiment preliminary preparation is easy, and time consumption of experimental process is short, efficient height, and stock utilization height, and cost is low;
(6) this device can be implemented under the isothermal isokinetic conditions process of simulation tubing extruding, makes the metal extrusion process parameters be easy to control, and the data of mensuration are more stable, the mobile performance of the metal that helps analyzing and researching;
Description of drawings
Fig. 1 is the structural representation of a kind of thin-wall high temperature alloy tubing simulation extrusion device of the present invention;
Fig. 2 is the structural representation of extruding pin of the present invention;
Among Fig. 1:
1-die shoe 2-guide pillar 3-guide pin bushing 4-upper bolster
5-pin 6-screw A 7-backing plate 8-centring ring
9-extrusion axis 10-recipient liner 11-dummy block 12-graphite pads
13-extruding pin 14-high temperature blank 15-glass isolator 16-induction coil
17-detent 18-circular hole 19-extrusion die 20-through hole A
21-through hole B 22-conical through-hole 23-die-cushion 24-screw B
25-round ring boss 26-cushion block 27-ring groove 28-screw C
29-locating rack 30-recipient outer lining 31-annular steps 32-thermocouple
34-multidiameter lower end, 33-multidiameter upper end
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention is a kind of thin-wall high temperature alloy tubing simulation extrusion device, as shown in Figure 1, the mould of simulation tubing hot extrusion is installed on the standard die set of guider, guider comprises upper bolster 4, die shoe 1, guide pillar 2 and guide pin bushing 3, one end of guide pin bushing 3 is connected with upper bolster 4, guide pillar 2 is connected with die shoe 1, guide pillar 2 other ends are socketed in the guide pin bushing 3, can move up and down along guide pin bushing 3, the mould of simulation tubing hot extrusion comprises extrusion axis 9, extruding pin 13, dummy block 11, locating rack 29, recipient liner 10, recipient outer lining 30, die-cushion 23, cushion block 26 and extrusion die 19.
Extrusion axis 9 is divided into two sections, and first section axle 33 and 34, the first sections axle 33 1 ends of second section axle are installed on the backing plate 7 by centring ring 8, and is connected and fixed with upper bolster 4 with screw A6 and shop bolt 5; The other end of second section axle 34 is threaded and pushes pin 13.In extrusion process, extruding pin 13 bears HTHP, if extruding pin 13 damages, by the design that is threaded, can conveniently change, as shown in Figure 2 extruding pin 13, extruding pin 13 lower ends are provided with 0.05 °～0.12 ° pattern draft, the demoulding very easily.
Recipient is a double-decker, comprises recipient liner 10 and recipient outer lining 30.Recipient liner 10 is no round-ended cylinder shape, be positioned at extrusion axis 9 with the extruding pin 13 be connected the part the periphery, recipient liner 10 lower ends are used for being contained in the high temperature blank 14 and the glass isolator 15 of extrusion process, be disposed with dummy block 11 and graphite pads 12 from top to bottom in high temperature blank 14 upper ends, dummy block 11 and extruding pin 13 be for step cooperates, when extruding pin 13 is downward when pushing, and 11 location of dummy block, strengthen rigidity effect, graphite pads 12 and glass isolator 15 lubricate in extrusion process.As shown in Figure 1, the top of recipient liner 10 can sweating heat galvanic couple 32, is used for 14 temperature surveys of high temperature blank; Because the effect that recipient liner 10 is bearing HTHP, very easily damage, so connect recipient outer lining 30 by interference fit at recipient liner 10 outer walls, the upper end of recipient outer lining 30 and upper side have ring groove 27 and annular steps 31, lower end and lower end side have ring groove 27 and the annular steps 31 with the upper end symmetry, the layout of the symmetry of recipient outer lining about in the of 30 can be in 30 1 damaged on end bad times of recipient outer lining, and two ends exchange up and down.The double-layer structure of recipient can reduce peak stress in the extrusion process, and damages the back and only need change recipient liner 10, can play the effect of saving precious metal, simultaneously more approaching industrial actual conditions of structure of two-layer recipient.
Extrusion die 19 is a conical die, inside is provided with conical through-hole 22, and die-cushion 23 middle parts are provided with circular hole 18, and the upper end is provided with round ring boss 25, cooperate with the ring groove 27 of recipient outer lining 30 lower ends, play positioning action, extrusion die 19 is fixedly connected in the circular hole 18 at die-cushion 23 middle parts, matched in clearance, position at die-cushion 23 corresponding conical through-holes 22, through hole B21 is set, and extruding pin 13 is aimed at the centre of extrusion die 19, and die-cushion 23 plays positioning action; Have a through hole A20 on the described die shoe 1, through hole A20 upper end is provided with detent 17, and die-cushion 23 bottoms are arranged in the detent 17 of die shoe 1.
Cushion block 26 is fixed on the periphery of die-cushion 23, and upper surface is provided with the locating ring of annular groove, and lower surface is fixedlyed connected with die shoe 1 by screw B24; Locating rack 29 is the no round-ended cylinder shape of hollow, be arranged on the periphery of recipient outer lining 30, the upper end cooperates with annular steps 31, the lower end cooperates with locating ring, locating rack 29 is connected with cushion block 26 by screw C28, locating rack 29 plays location and pressuring action, and cushion block 26 plays the effect that connects locating rack 29 and die shoe 1.The locating ring stationary positioned frame 29 of cushion block 26, recipient outer lining 30, fixedly connected die-cushion 23, guaranteed device to moderate.Between locating rack 29 and the recipient outer lining 30, between cushion block 26 and the die-cushion 23 induction coil 16 is set, play the effect of preheating recipient and extrusion die 19.
The wear problem of recipient liner 10 is very outstanding in the tubing extruding, therefore recipient liner 10 is lubricated very important, all scribble lubricant at the inner surface of recipient liner 10, the outer surface of high temperature blank 14, and high temperature blank front end is provided with glass isolator 15, lubricant is selected according to the needs in the industrial production, this device is by using different lubricants, the abrasion condition of analysis recipient liner 10 under different lubricating condition, and to the influence of forming tubular product surface quality, thereby be in the industrial production, the use of recipient liner 10 lubricants provides foundation.
Among the present invention according to the different process requirement of institute's extrude tubes, by changing the extrusion speed in the extrusion process, the technological parameters such as angle of extrusion temperature and extrusion die 19 cone angles, perhaps for the requirement of the tubing of different size, change the extrusion die 19 of different size, extruding pins 13 etc. can obtain the mobile parameter of metal at extrusion process.Described device is easy to use, flexible.This experimental provision can be simulated the process of tubing extruding under the isothermal isokinetic conditions, make the metal extrusion process parameters be easy to control, and the data of mensuration are more stable, the mobile performance of the metal that helps analyzing and researching.
The present invention replaces industrial production test with the simulated experiment of metal fever extruding, the situation of lubricated, the wearing and tearing of the heat transfer of simulation high temperature alloy blank in hot procedure, stressed, distortion and mould, find out the be squeezed rule that influences of temperature, rate of deformation, mould modular angle etc. of required extruding force of metal fever extrusion process and metal flow, optimize the optimal processing parameter of experiment metal in extrusion process used for forming.
The device that assembles is installed to and carries out squeeze test on extruder or the forcing press, and the course of work of this device is:
(1) preheating simulation extrusion device: by the induction coil 16 preheating simulation extrusion devices on the device, preheat temperature is 200～450 ℃;
(2) apply lubricant: blank 14, recipient liner 10 are heated to 100～150 ℃, coat glass powdery lubricant at blank 14 surfaces and recipient liner 10 inner surfaces of heating respectively;
(3) heating extrusion billet: blank 14 is lain in heating furnace, feed protective gas, be heated to required temperature according to the characteristic of different metal material, and the insulation certain hour, make its even heat penetration;
(4) extrusion molding: earlier glass isolator 15 is put into recipient 10, then put into the blank 14 that heats, successively graphite pads 12, dummy block 11 are put into recipient liner 10 again, upper bolster 4 moves downward by guide pin bushing 3, guide pillar 2, and extrusion axis 9 moves down and begins extruding then, and speed is 10～400mm/s, extrusion ratio is determined on a case-by-case basis, when centring ring 8 contact locating racks 29 and recipient 10, pipe is extruded from pressurizing unit by the through hole A20 on the die shoe 1, and extruding finishes;
(5) annealing: hot-pressed pipe is put into cold water be cooled to room temperature, remove surperficial residual glass film thin layer;
(6) cleaning extrusion tube blank: pipe endoporus and outer surface after the extruding are cleaned out.
Claims (4)
1. thin-wall high temperature alloy tubing simulation extrusion device, include the standard die set of guider and the mould of simulation tubing hot extrusion, it is characterized in that the mould of simulating the tubing hot extrusion is installed on the standard die set of guider, standard die set comprises upper bolster (4), die shoe (1), guide pillar (2) and guide pin bushing (3), one end of guide pin bushing (3) is connected with upper bolster (4), guide pillar (2) one ends are connected with die shoe (1), guide pillar (2) other end is socketed in the guide pin bushing (3), can move up and down along guide pin bushing (3); The simulative tube material hot-extrusion mold is between die shoe and upper bolster, and hot-extrusion mold comprises extrusion axis (9), extruding pin (13), dummy block (11), locating rack (29), recipient, die-cushion (23), cushion block (26) and extrusion die (19); Extrusion axis (9) is a multidiameter, is divided into multidiameter upper end (33) and multidiameter lower end (34); Multidiameter upper end (33) one ends are installed on the backing plate (7) by centring ring (8), and are connected and fixed with upper bolster (4) with screw A (6) and shop bolt (5); Pin (13) is pushed in multidiameter lower end (34) with being threaded; Extruding pin (13) lower end is provided with 0.05 °～0.12 ° pattern draft; Recipient is a double-decker, comprises recipient liner (10) and recipient outer lining (30); Recipient liner (10) is no round-ended cylinder shape, be positioned at extrusion axis (9) with the extruding pin (13) be connected the part the periphery, recipient liner (10) inside is used for being contained in the high temperature blank (14) of extrusion process, be disposed with dummy block (11), graphite pads (12) from top to bottom in high temperature blank (14) upper end, be provided with glass isolator (15) in high temperature blank (14) lower end, dummy block (11) cooperates for step with extruding pin (13); All scribble lubricant at the inner surface of recipient liner (10), the outer surface of high temperature blank (14); The top of recipient liner (10) is welded with thermocouple (32); Connect recipient outer lining (30) at recipient liner (10) outer wall by interference fit, the upper end of recipient outer lining (30) and upper side have ring groove (27) and annular steps (31), and lower end and lower end side have ring groove (27) and the annular steps (31) with the upper end symmetry; The layout of recipient outer lining (30) symmetry up and down can be in (30) one damaged on end bad times of recipient outer lining, and two ends exchange up and down.
2. a kind of according to claim 1 thin-wall high temperature alloy tubing simulation extrusion device is characterized in that extrusion die (19) is conical die, and inside is provided with conical through-hole (22); Die-cushion (23) middle part is provided with circular hole (18), and the upper end is provided with round ring boss (25), cooperates with the ring groove (27) of recipient outer lining (30) lower end; Extrusion die (19) is fixedly connected in the circular hole (18) at die-cushion (23) middle part, matched in clearance; In the position of the corresponding conical through-hole of die-cushion (23) (22), through hole B (21) is set, extruding pin (13) is aimed at the centre of extrusion die (19).
3. a kind of according to claim 1 thin-wall high temperature alloy tubing simulation extrusion device is characterized in that cushion block (26) is fixed on the periphery of die-cushion (23), and upper surface is provided with the locating ring of annular groove, and lower surface is fixedlyed connected with die shoe (1) by screw B (24); Locating rack (29) is the no round-ended cylinder shape of hollow, be arranged on the periphery of recipient outer lining (30), the upper end cooperates with annular steps (31), the lower end cooperates with the locating ring that described cushion block upper surface is provided with, locating rack (29) is connected with cushion block (26) by screw C (28), locating rack (29) plays location and pressuring action, and cushion block (26) plays the effect that connects locating rack (29) and die shoe (1).
4. a kind of according to claim 1 thin-wall high temperature alloy tubing simulation extrusion device is characterized in that between locating rack (29) and the recipient outer lining (30), between cushion block (26) and the die-cushion (23) induction coil (16) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102376780A CN101700537B (en) | 2009-11-20 | 2009-11-20 | Thin-wall high temperature alloy tubing simulation extrusion device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102376780A CN101700537B (en) | 2009-11-20 | 2009-11-20 | Thin-wall high temperature alloy tubing simulation extrusion device |
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| CN101700537A CN101700537A (en) | 2010-05-05 |
| CN101700537B true CN101700537B (en) | 2011-06-08 |
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