CN210475046U - Positive-pressure creep leveling furnace - Google Patents
Positive-pressure creep leveling furnace Download PDFInfo
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- CN210475046U CN210475046U CN201920859600.1U CN201920859600U CN210475046U CN 210475046 U CN210475046 U CN 210475046U CN 201920859600 U CN201920859600 U CN 201920859600U CN 210475046 U CN210475046 U CN 210475046U
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- 230000007246 mechanism Effects 0.000 claims abstract description 54
- 239000010935 stainless steel Substances 0.000 claims abstract description 39
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 39
- 238000005266 casting Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 43
- 238000009413 insulation Methods 0.000 claims description 18
- 239000011449 brick Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 238000005485 electric heating Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 229910052902 vermiculite Inorganic materials 0.000 description 3
- 235000019354 vermiculite Nutrition 0.000 description 3
- 239000010455 vermiculite Substances 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000005058 metal casting Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
A positive-pressure creep leveling furnace is characterized in that a pressure frame is arranged above a base, a movable lower furnace body is arranged on the base, an upper furnace body fixed below a movable cross beam is arranged above the lower furnace body, a descending mechanism arranged above the upper cross beam of the pressure frame is suspended below the upper cross beam of the pressure frame, and the descending mechanism drives the movable cross beam to move up and down to open or close the upper furnace body and the lower furnace body; a casting platform, a heat-resistant layer and a stainless steel flat plate are arranged in the furnace chamber of the lower furnace body from bottom to top; the upper furnace body is internally provided with an electric heating body on the inner side wall, a pressure bag is arranged in the furnace chamber, the pressure bag is fixed in a rectangular cavity seat, the upper end of the rectangular cavity seat is connected with an inflation pipeline of which the tail end is provided with an inflation valve, and the upper end of the rectangular cavity seat is suspended in the furnace chamber of the upper furnace body through a descending mechanism above a movable cross beam; the descending mechanism drives the pressure bag to move downwards, so that after the lower end face of the pressure bag is contacted with the upper end face of the blank, the pressure bag is filled with 1-8 atmospheric pressures through the connection of the inflation valve and the high-pressure air source to uniformly apply positive pressure to the blank from top to bottom.
Description
Technical Field
The utility model belongs to the technical field of titanium and titanium alloy panel processing, concretely relates to malleation creep school open-hearth furnace.
Background
The conventional leveling methods for titanium and titanium alloy plates are in two main categories: one is waste heat leveling, in which hot materials are stacked according to a certain rule, weights are pressed on the hot materials, and plates are leveled by using waste heat and gravity. The other type is vacuum creep furnace leveling, which forms a sizing pressure by the pressure difference generated by vacuum and atmospheric pressure in the furnace and performs leveling in a heating state.
Such vacuum creep leveling furnaces have inherent disadvantages: 1. the vacuum degree maintained in the furnace is only 0.5 atmosphere, the creep deformation correcting pressure of the pressure difference with the atmospheric pressure, which is acted on the plate stack through the soft furnace cover, is small (about 0.5 ton/square meter), so the creep deformation correcting pressure is compensated by prolonging the creep deformation heat preservation time, and the production period is long. Under the condition that the thickness of the plate is large or the total thickness is large with more layers, the shape correcting pressure is more insufficient. The maximum stack thickness was 150 mm. 2. The furnace bottom platform of the vacuum creep furnace is provided with a heating body, heat is transferred to materials through thick refractory bricks, the heat transfer efficiency is low, the platform structure is complex, and the manufacturing cost is high; 3. the vacuum degree in the vacuum creep furnace chamber is low (only about 0.5 atmosphere), and the plate is oxidized to a certain degree. 4. The furnace chamber and furnace bottom platform has large volume, large heat capacity and long heating and cooling time, and the production period is prolonged; the thickness of the laminated plates of the equipment is about 150 mm, and about 6-8 stacks of plates can be stacked simultaneously. When the small batch or the specification is relatively complicated, the batch is waited for and the period is forced to be prolonged if the small batch or the specification is not put into a furnace; 5. the upper furnace soft furnace cover is generally composed of a thin steel plate, a heat insulation layer vermiculite powder, a thin film and the like, a large amount of vermiculite powder is loaded and cleaned, dust is large, and the working environment of workers is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a malleation creep school open-hearth furnace to overcome prior art's shortcoming, improve the quality and the production efficiency of product, improve operational environment, shorten production cycle.
The utility model discloses the technical scheme who adopts: a positive-pressure creep leveling furnace comprises a base, wherein a press frame is arranged above the base, a movable lower furnace body is arranged on the base, an upper furnace body is arranged above the lower furnace body and fixed below a movable cross beam, the movable cross beam is suspended below an upper cross beam of the press frame through a first lifting mechanism arranged above the upper cross beam of the press frame, and the first lifting mechanism drives the movable cross beam to move up and down to open or close the upper furnace body and the lower furnace body; a casting platform, a heat-resistant layer and a stainless steel flat plate are arranged in the furnace chamber of the lower furnace body from bottom to top; an electric heating body is arranged on the inner side wall of the upper furnace body, and a stainless steel pressure bag is arranged in the furnace chamber; the stainless steel pressure bag is of a rectangular cavity structure and is fixed in a rectangular cavity seat positioned above the stainless steel pressure bag, the upper end of the rectangular cavity seat is connected with an inflation pipeline I communicated with the stainless steel pressure bag cavity, and the inflation pipeline I upwards sequentially penetrates through the upper furnace body, the top of the movable cross beam and the rear end of the upper cross beam of the pressure frame and is provided with an inflation valve I; the upper end of the rectangular cavity seat is suspended in the furnace chamber of the upper furnace body through a second lifting mechanism which penetrates through the top of the upper furnace body and is arranged above the movable cross beam; the second lifting mechanism drives the rectangular cavity seat to move downwards, so that after the lower end face of the stainless steel pressure bag is contacted with the upper end face of the blank, the stainless steel pressure bag is filled with 1-8 atmospheric pressures through the inflation valve I to uniformly apply positive pressure to the blank from top to bottom.
An air cooling pipeline is arranged in the casting platform and is connected with a first cooling fan; the heat-resistant layer is formed by laying refractory bricks, and the stainless steel flat plate is laid on the heat-resistant layer; and heat-resistant fans capable of blowing air into the furnace chamber are arranged on two sides of the upper furnace body.
The second lifting mechanism is connected with eight groups of air pressure lifting mechanisms through an inflation pipeline II, and the tail end of the inflation pipeline II is communicated with a high-pressure air source through an inflation valve II; the eight groups of air pressure lifting mechanisms are symmetrically fixed above the movable cross beam in the front-back direction, and the lower ends of piston rods of the eight groups of air pressure lifting mechanisms sequentially penetrate through the movable cross beam and through holes in the top of the upper furnace body and then are fixedly connected to the upper end of the rectangular cavity seat; the lower end of the piston rod is provided with a T-shaped cooling air duct, eight piston rods of the eight groups of air pressure drop mechanisms are respectively sleeved with a retractable heat insulation sleeve, the upper end of the retractable heat insulation sleeve is fixedly connected with the lower end of a movable cross beam, the lower end of the retractable heat insulation sleeve is fixedly connected with the upper end of a rectangular cavity seat, an axial cooling air duct is formed between the piston rod and the retractable heat insulation sleeve, a labyrinth cooling air duct is arranged in the rectangular cavity seat, the axial cooling air duct is communicated with the labyrinth cooling air duct at the lower end through the T-shaped cooling air duct, the upper ends of the eight axial cooling air ducts are communicated with a high-pressure air source through an inflation pipeline III, the tail end of the inflation pipeline III is provided with an inflation valve III.
The stainless steel pressure bag is characterized in that a heat insulation layer is arranged on the inner wall of the lower end face of the stainless steel pressure bag, and heat insulation cotton is filled in the heat insulation layer.
The first lifting mechanism is a synchronous lifting lead screw mechanism and is formed by connecting four groups of lead screw lifting mechanisms, three gear transmission boxes and a motor; the four groups of screw rod lifting mechanisms are symmetrically fixed above the upper cross beam of the press frame in a front-back manner, the lower ends of the screw rods of the four groups of screw rod lifting mechanisms penetrate through holes of the upper cross beam of the press frame and then are in threaded connection with four corners of the movable cross beam, and the movable cross beam reciprocates along the screw rods.
The blank is positioned in a vacuum bag, the vacuum bag is a rectangular container made of a stainless steel plate, the length and width dimensions are slightly larger than those of the blank, the height is slightly larger than that of the blank lamination, and after the blank lamination is placed in the vacuum bag, the vacuum bag is sealed and welded, vacuumized and filled with argon.
The lower end of the lower furnace body is fixed on a rail car, and the rail car reciprocates along a rail; the track is composed of an adjustable section and a fixed section, and the height of the adjustable section is lifted up and lowered down by a hydraulic jack fixed at the lower end of the adjustable section.
And two ends of the upper furnace body are provided with observation windows.
Compared with the prior art, the utility model has the advantages and the effect:
1. the utility model adopts a composite structure, and consists of a metal casting platform, refractory bricks and a stainless steel flat plate. The metal casting platform is machined, and the flatness is guaranteed, so that a smooth reference is placed on the refractory bricks. A layer of stainless steel flat plate (about 10 mm) is laid on the refractory bricks to serve as a reference plane, the plate also has a protection effect on the refractory bricks, the reference plane is convenient to clean and correct, the operating environment is improved, and the product quality is guaranteed.
2. The furnace chamber of the utility model adopts a top-bottom closed structure, and the loading and unloading are convenient. And the side wall in the upper furnace chamber is provided with the electric heating wire, so that the distribution is reasonable and the maintenance is convenient. When the temperature is raised, the heating body directly transfers heat to the blank, the heat transfer is fast, and then the air in the furnace chamber is circulated by the fans arranged on the two sides of the upper furnace chamber, so that the temperature around the blank is uniform, and the quality of the product is improved.
3. One important reason for the long production cycle of the prior art is the long cooling time, which is about 72 hours in the existing creep furnace. When the utility model is cooled, the pressure bag leaves the blank, so that the upper surface of the blank becomes a radiating surface (the upper surface of the original creep furnace blank is a thicker layer of vermiculite powder heat-insulating material); then, circulating air in the furnace chamber through fans arranged on two sides of the upper furnace chamber, and carrying out forced air cooling on the blank to accelerate the cooling speed of the blank; in addition, cold air is blown into the longitudinal holes in the casting platform, so that the heat exchange below the blank is accelerated; through the comprehensive cooling measures, the cooling time is shortened by more than half compared with the conventional creep furnace, and the production period is shortened.
4. The utility model discloses add the malleation to the blank through the pressure package during the levelling, and the pressure of pressure package can design and adjust as required. If the laminated thickness of the new equipment blank reaches 900 mm, the charging amount is equivalent to that of the original equipment, and the production efficiency is improved due to the shortening of the production period.
5. The utility model discloses a material is only put a buttress, when the material of pending is few, also can blow-in production.
6. The blank is pressed by the pressure bag, so that the pressing is uniform, and the quality of the product is ensured.
7. The utility model discloses pressure package base and load pole have the forced air cooling passageway, and when guaranteeing the stove internal heating up, pressure package base and load pole maintain the lower temperature, guarantee that pressure package base and load pole have sufficient rigidity.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a side view of the structure of the present invention;
FIG. 3 is a schematic structural view of the furnace bottom platform of the present invention;
FIG. 4 is a schematic view of the stainless steel pressure pack of the present invention;
FIG. 5 is a schematic view of the vacuum bag of the present invention;
fig. 6 is a schematic view of the upper furnace body synchronous lifting mechanism of the utility model.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings 1-6 and the detailed description thereof.
A positive pressure creep leveling furnace: the furnace comprises a base 1, wherein a pressure frame 2 is arranged above the base 1, a movable lower furnace body 3 is arranged on the base 1, an upper furnace body 4 is arranged above the lower furnace body 3, and the upper furnace body 4 is fixed below a movable cross beam 12; the movable cross beam 12 is suspended on the pressure frame 2 through a first lifting mechanism 5 arranged above the pressure frame 2; the first lifting mechanism 5 drives the movable cross beam 12 to move up and down, so that the upper furnace body 4 and the lower furnace body 3 are opened or closed; a casting platform 6, a heat-resistant layer 7 and a stainless steel flat plate 8 are arranged in the furnace chamber of the lower furnace body 3 from bottom to top; an electric heater 9 is arranged on the inner side wall of the upper furnace body 4, and a stainless steel pressure bag 10 is arranged in the furnace chamber; the stainless steel pressure pack 10 is of a rectangular cavity structure and is fixed in a rectangular cavity seat 11 above the stainless steel pressure pack; the upper end of the rectangular cavity seat 11 is connected with an inflation pipeline I13 communicated with the cavity of the stainless steel pressure bag 10, and the inflation pipeline I13 upwards sequentially penetrates through the upper furnace body 4, the top of the movable cross beam 12 and the rear end of the upper cross beam of the pressure frame 2 to be provided with an inflation valve 14; the upper end of the rectangular cavity seat 11 is suspended in the furnace chamber of the upper furnace body 4 through a second lifting mechanism 26 which passes through the top of the upper furnace body 4 and is arranged above the movable cross beam 12; the second lifting mechanism 26 drives the rectangular cavity seat 11 to move downwards, so that the lower end face of the stainless steel pressure bag 10 is in contact with the upper end face of the blank 15, and then the stainless steel pressure bag 10 is filled with compressed gas of 1-8 atmospheres through the connection of the inflation valve I14 and a high-pressure gas source, so that the stainless steel pressure bag uniformly applies positive pressure to the blank 15 from top to bottom.
An air cooling pipeline 16 is arranged in the casting platform 6, and the air cooling pipeline 16 is connected with a first cooling fan 17; the heat-resistant layer 7 is formed by laying refractory bricks, and a stainless steel flat plate 8 is laid on the refractory bricks; and heat-resistant fans 19 capable of blowing air into the furnace chamber are arranged on two sides of the upper furnace body 4.
The second lifting mechanism 26 is connected by eight groups of air pressure lifting mechanisms 37 through an inflation pipeline II 31, and the tail end of the inflation pipeline II 31 is communicated with a high-pressure air source through an inflation valve II 33; the eight groups of air pressure lifting mechanisms 37 are symmetrically fixed above the movable cross beam 12, and the lower ends of the piston rods of the eight groups of air pressure lifting mechanisms are fixedly connected to the upper end of the rectangular cavity seat 11 after sequentially penetrating through the movable cross beam 12 and through holes in the top of the upper furnace body 4; the lower end of the piston rod is provided with a T-shaped cooling air duct 24, eight piston rods of the eight groups of air pressure reducing mechanisms 37 are respectively sleeved with a retractable heat insulating sleeve 27, the upper end of the retractable heat insulating sleeve 27 is fixedly connected with the lower end face of the movable cross beam 12, the lower end of the retractable heat insulating sleeve 27 is fixedly connected with the upper end of the rectangular cavity seat 11, and an axial cooling air duct 22 is formed between the piston rod and the retractable heat insulating sleeve 27; the rectangular cavity seat 11 is internally provided with a labyrinth cooling air duct 23, the axial cooling air ducts 22 are communicated with the labyrinth cooling air ducts 23 at the lower ends through T-shaped cooling air ducts 24, the upper ends of the eight axial cooling air ducts 22 are communicated with a high-pressure air source through air charging pipelines III 32, the tail ends of the air charging pipelines III 32 are provided with air charging valves 34, and the labyrinth cooling air ducts 23 are communicated with an exhaust pipe 35 positioned in the center of the rectangular cavity seat 11. And the inflation valve II 33 controls the air pressure lifting mechanism 37 to move up and down.
The inner wall of the lower end face of the stainless steel pressure bag 10 is provided with a heat insulation layer 10-1, and heat insulation cotton is filled in the heat insulation layer 10-1.
The first lifting mechanism 5 is a synchronous lifting lead screw mechanism and is formed by connecting four groups of lead screw lifting mechanisms 20, three gear transmission boxes 21 and a motor 25; the four groups of screw rod lifting mechanisms 20 are symmetrically fixed above the upper cross beam of the furnace frame 2 in a front-back manner, the lower ends of the screw rods of the four groups of screw rod lifting mechanisms penetrate through holes of the upper cross beam of the furnace frame 2 and then are in threaded connection with four corners of the movable cross beam 12, and the movable cross beam 12 reciprocates along the screw rods.
The blank 15 is positioned in a vacuum bag, the vacuum bag is a rectangular container made of stainless steel plates, the length and width dimensions are slightly larger than those of the blank 15, the height is slightly larger than the laminated height of the blank 15, the blank 15 is laminated and placed in the vacuum bag, vacuum is sealed and welded, then argon is filled, vacuum is pumped, and air residue is reduced as much as possible.
The lower end of the lower furnace body 3 is fixed on a rail car 28, and the rail car 28 reciprocates along a rail 29; the track 29 is composed of an adjustable section 29-1 and a fixed section 29-2, and the adjustable section 29-1 is lifted by a hydraulic jack 30 fixed at the lower end thereof.
And two ends of the upper furnace body 4 are provided with observation windows 36.
The working process is as follows: firstly, starting a first lifting mechanism 5 to drive a movable cross beam 12 to move upwards, so that an upper furnace body 4 fixed at the lower end moves upwards, and stacking a vacuum bag 15 (if the plate is a plate with oxide skin, the plate can be directly placed on a stainless steel plate 8 without the vacuum bag) on the stainless steel plate 8; starting the first lifting mechanism 5 to drive the movable cross beam 12 to move downwards, so that the upper furnace body 4 fixed at the lower end moves downwards, and the lower end surface of the upper furnace body 4 and the upper end surface of the lower furnace body 3 are closed; the electric heater 9 (electric heating wire) is started to heat the blank 15, and the heat-resistant fan 19 is started to blast air to accelerate the hot air circulation in the furnace chamber, so that the temperature in the furnace chamber is uniform. And opening an inflation valve III 34 to cool the piston rod of the second lifting mechanism 26 and the rectangular cavity seat 11 of the pressure bag 10. The temperature in the furnace exceeds 600 ℃, and the heat-resistant fan 19 stops working; when the temperature rises to 650 ℃, the heat preservation stage is carried out, the heat preservation is carried out for 4 to 8 hours, and the integral temperature (particularly the material core part) of the blank 15 is ensured to reach 650 ℃. Then, the second lifting mechanism 26 is controlled by the inflation valve II 33 to drive the pressure packet 10 to move downwards, so that the lower end face of the pressure packet 10 is tightly attached to the top face of the blank 15, and the air cylinder 37 is pressurized according to the installation process requirement. At the beginning of the creep deformation stage, the pressure bag 10 is connected with a high-pressure air source through an inflation valve I14 to charge compressed air into the pressure bag 10, and according to a preset pressure, the pressure bag 10 is pressed to bulge outwards from low pressure to high pressure to uniformly apply a positive pressure to the blank 15 from top to bottom; the lowering of the height of the billet is observed, and the height of the rectangular cavity base 11 is adjusted by the second elevating mechanism 26. When the creep reaches a predetermined time, the heating is stopped and the pressure of the pressure pack 10 is kept constant. Starting the heat-resisting fan 19 and the first cooling fan 17 to cool the furnace body and the blank; when the temperature is reduced to 300 ℃, the pressure bag 10 releases pressure, the second lifting mechanism 26 is controlled by the inflation valve II 33 to move the rectangular cavity seat 11 upwards, and the pressure bag 10 leaves the blank 15. When the temperature in the furnace cavity is reduced to below 150 ℃, the upper furnace body moves upwards, the heat-resisting fan 19 stops and the charging valve III 34 is closed. The skip 28 is activated to remove the leveled blanks 15. By the action of the first cooling fan 17 and natural cooling, when the surface temperature of the blank is reduced to 50 ℃, the first cooling fan 17 stops, the vacuum bag is hung away, and the vacuum bag is opened in another place.
The blank with the surface allowed to be oxidized can be directly stacked on the hearth platform for leveling. And the blank which is not allowed to be oxidized is placed into a vacuum bag, argon (which can reach 0.2 atmosphere) is filled when the vacuum bag is evacuated to 1Pa, then the vacuum bag is evacuated to 1Pa, the exhaust tube is sealed, and then the vacuum bag is placed on a furnace bottom platform for leveling, so that the blank is not oxidized in the creep process. The vacuum bag is a rectangular container made of stainless steel sheet, the length and width dimensions of which are slightly larger than those of the blank 15, and the height of which is slightly larger than the height of the stack of the blank 15.
The utility model discloses a pressure package exerts pressure for the blank, heats simultaneously, and under the effect of temperature and pressure, the creep takes place for the blank to reach the purpose of levelling and getting rid of residual stress. The composite structure for the furnace bottom platform ensures that the flatness of the whole furnace bottom plane is less than or equal to 0.5 mm/m2(ii) a Due to the external positive pressure, thicker blanks can be leveled; the external pressure is uniformly applied to the blank through the pressure bag, the force is flexibly applied, and the blank is uniformly stressed; and the ventilation facility is arranged, so that the temperature in the furnace is uniform, the temperature rise is fast, the cooling and heat dissipation are fast, and the production period is shortened; the quality and the production efficiency of the product are improved.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that all equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a malleation creep levelling furnace, includes base (1), its characterized in that: a pressure rack (2) is arranged above the base (1), a movable lower furnace body (3) is arranged on the base (1), an upper furnace body (4) is arranged above the lower furnace body (3), the upper furnace body (4) is fixed below a movable cross beam (12), the movable cross beam (12) is suspended below an upper cross beam of the pressure rack (2) through a first lifting mechanism (5) arranged above the upper cross beam of the pressure rack (2), and the first lifting mechanism (5) drives the movable cross beam (12) to move up and down to open or close the upper furnace body (4) and the lower furnace body (3); a casting platform (6), a heat-resistant layer (7) and a stainless steel flat plate (8) are arranged in the furnace chamber of the lower furnace body (3) from bottom to top; an electric heater (9) is arranged on the inner side wall of the upper furnace body (4), and a stainless steel pressure bag (10) is arranged in the furnace chamber; the stainless steel pressure bag (10) is of a rectangular cavity structure and is fixed in a rectangular cavity seat (11) positioned above the stainless steel pressure bag, the upper end of the rectangular cavity seat (11) is connected with an inflation pipeline I (13) communicated with the cavity of the stainless steel pressure bag (10), and the inflation pipeline I (13) upwards sequentially penetrates through the upper furnace body (4), the top of the movable cross beam (12) and the rear end of the upper cross beam of the pressure frame (2) and is provided with an inflation valve I (14); the upper end of the rectangular cavity seat (11) is suspended in the furnace chamber of the upper furnace body (4) through a second lifting mechanism (26) which penetrates through the top of the upper furnace body (4) and is arranged above the movable cross beam (12); the second lifting mechanism (26) drives the rectangular cavity seat (11) to move downwards, so that after the lower end face of the stainless steel pressure bag (10) is contacted with the upper end face of the blank (15), the stainless steel pressure bag (10) is filled with 1-8 atmospheric pressures through the connection of the inflation valve I (14) and a high-pressure air source to uniformly apply positive pressure to the blank (15) from top to bottom.
2. A positive pressure creep leveling furnace according to claim 1 wherein: an air cooling pipeline (16) is arranged in the casting platform (6), and the air cooling pipeline (16) is connected with a first cooling fan (17); the heat-resistant layer (7) is formed by laying refractory bricks, and the stainless steel flat plate (8) is laid on the heat-resistant layer; and heat-resistant fans (19) capable of blowing air into the furnace chamber are arranged on two sides of the upper furnace body (4).
3. A positive pressure creep leveling furnace according to claim 1 or 2 wherein: the second lifting mechanism (26) is connected with eight groups of air pressure lifting mechanisms (37) through an inflation pipeline II (31), and the tail end of the inflation pipeline II (31) is communicated with a high-pressure air source through an inflation valve II (33); the eight groups of air pressure lifting mechanisms (37) are symmetrically fixed above the movable cross beam (12) from front to back, and the lower ends of piston rods of the air pressure lifting mechanisms sequentially penetrate through the movable cross beam (12) and through holes in the top of the upper furnace body (4) and then are fixedly connected to the upper end of the rectangular cavity seat (11); the lower end of the piston rod is provided with a T-shaped cooling air duct (24), eight piston rods of the eight groups of air pressure lifting mechanisms (37) are respectively sleeved with a retractable heat insulation sleeve (27), the upper end of the retractable heat insulation sleeve (27) is fixedly connected with the lower end surface of the movable beam (12), the lower end of the retractable heat insulation sleeve (27) is fixedly connected with the upper end of the rectangular cavity seat (11), an axial cooling air duct (22) is formed between the piston rod and the retractable heat insulation sleeve (27), the rectangular cavity seat (11) is internally provided with a labyrinth cooling air duct (23), the axial cooling air duct (22) is communicated with the labyrinth cooling air duct (23) at the lower end through a T-shaped cooling air duct (24), the upper ends of the eight axial cooling air ducts (22) are communicated with a high-pressure air source through air charging pipelines III (32), air charging valves III (34) are arranged at the tail ends of the air charging pipelines III (32), and the labyrinth type cooling air ducts (23) are communicated with an exhaust pipe (35) positioned in the center of the rectangular cavity seat (11).
4. A positive pressure creep leveling furnace according to claim 3 wherein: the inner wall of the lower end face of the stainless steel pressure bag (10) is provided with a heat insulation layer (10-1), and heat insulation cotton is filled in the heat insulation layer (10-1).
5. A positive pressure creep leveling furnace according to claim 4 wherein: the first lifting mechanism (5) is a synchronous lifting lead screw mechanism and is formed by connecting four groups of lead screw lifting mechanisms (20), three gear transmission boxes (21) and a motor (25); the four groups of screw lifting mechanisms (20) are symmetrically fixed above an upper cross beam of the pressure rack (2) in a front-back manner, the lower ends of screws of the four groups of screw lifting mechanisms penetrate through holes of the upper cross beam of the pressure rack (2) and then are in threaded connection with four corners of the movable cross beam (12), and the movable cross beam (12) moves in a reciprocating manner along the screws.
6. A positive pressure creep leveling furnace according to claim 5 wherein: the blank (15) is positioned in a vacuum bag, the vacuum bag is a rectangular container made of stainless steel plates, the length and width dimensions are slightly larger than those of the blank (15), the height is slightly larger than the laminated height of the blank (15), and after the blank (15) is laminated in the vacuum bag, vacuum envelope welding is performed, vacuum pumping is performed, and argon is filled.
7. The positive pressure creep leveling furnace according to claim 6, wherein: the lower end of the lower furnace body (3) is fixed on a rail car (28), and the rail car (28) reciprocates along a rail (29); the track (29) is composed of an adjustable section (29-1) and a fixed section (29-2), and the adjustable section (29-1) is lifted by a hydraulic jack (30) fixed at the lower end of the adjustable section.
8. The positive pressure creep leveling furnace according to claim 7, wherein: and two ends of the upper furnace body (4) are provided with observation windows (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920859600.1U CN210475046U (en) | 2019-06-10 | 2019-06-10 | Positive-pressure creep leveling furnace |
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| CN201920859600.1U CN210475046U (en) | 2019-06-10 | 2019-06-10 | Positive-pressure creep leveling furnace |
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| CN210475046U true CN210475046U (en) | 2020-05-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110116148A (en) * | 2019-06-10 | 2019-08-13 | 宝鸡市泛美材料科技有限公司 | A kind of positive pressure creep smoothing furnace |
-
2019
- 2019-06-10 CN CN201920859600.1U patent/CN210475046U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110116148A (en) * | 2019-06-10 | 2019-08-13 | 宝鸡市泛美材料科技有限公司 | A kind of positive pressure creep smoothing furnace |
| CN110116148B (en) * | 2019-06-10 | 2024-01-16 | 宝鸡市泛美材料科技有限公司 | Positive pressure creep leveling furnace |
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