CN114273625B - Small-size hot work die steel casting forming device - Google Patents
Small-size hot work die steel casting forming device Download PDFInfo
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- CN114273625B CN114273625B CN202111618129.5A CN202111618129A CN114273625B CN 114273625 B CN114273625 B CN 114273625B CN 202111618129 A CN202111618129 A CN 202111618129A CN 114273625 B CN114273625 B CN 114273625B
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Abstract
The invention discloses a small hot-work die steel casting forming device, and mainly relates to the technical field of steel ingot casting. Comprises a base mechanism, a mould casting mechanism and a blending mechanism; the mould casting mechanism includes rotating the cover, rotates the cover and passes through the bearing spare rotation with base mechanism and be connected, and rotate and can be based on electric drive and control for rotational speed 60-150 commentaries on classics/minute, and mixing mechanism includes the stand that two relative mould casting mechanism symmetries set up between two parties, and the top of stand is equipped with rather than normal running fit's slip cap, and sliding fit has the slide bar in the slip cap, and horizontal pole fixed connection is passed through on the top of two slide bars, and the central authorities of horizontal pole are fixed with the puddler with the slide bar syntropy extension, the puddler is ceramic ware, the bottom of puddler is equipped with the triangle-shaped thick liquid piece that can pass through notes liquid mouth. The invention has the beneficial effects that: the method ensures that the temperature inside and outside the steel die and the molten steel is consistent, and solves the problem of poor molding quality caused by the difference of the temperature gradient from outside to inside.
Description
Technical Field
The invention relates to the technical field of steel ingot casting, in particular to a small hot-work die steel casting forming device.
Background
The metal grows up in a dendritic crystal mode in the process of casting and forming the hot die steel, the traditional casting method is that molten steel naturally solidifies, although a casting mould is heated before casting, the heating temperature of the casting mould is obviously different from the temperature of the molten steel, and after the molten steel is cast into the casting mould, the temperature of the casting mould is lower, so that a large number of columnar crystals can be formed in a cast ingot due to the fact that the temperature of the molten steel in the center and the edge of the casting mould is different, and the natural cooling solidification can greatly reduce the performance of the H13 hot die steel; meanwhile, because the H13 hot work die steel has high content of alloy elements, component segregation is easily generated in the solidification process, the core structure is extremely uneven, coarse liquated carbide is formed in the structure along a grain boundary, if the coarse liquated carbide is not improved, strong stress concentration is caused in a steel matrix, so that microcracks are generated and rapidly diffused into large cracks in the matrix, and finally fatigue failure is caused.
Meanwhile, the temperature based on the molten steel is very high and is about 1500 ℃ to above, so the treatment of the molten steel is difficult to be carried out by a conventional mixing mode, the molten steel is very dangerous, and the molten steel is generally in an open structure in casting molding, so the molten steel is very easy to splash and cause great danger if the molten steel receives severe disturbance. Therefore, how to realize safe uniform mixing of the molten steel is a problem which is difficult to solve.
Disclosure of Invention
The invention aims to provide a small hot-work die steel casting forming device, which enables the temperature inside and outside a steel die and molten steel to be consistent and solves the problem of poor forming quality caused by the difference of temperature gradients from outside to inside.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a small-sized hot-working die steel casting forming device comprises a base mechanism, a die casting mechanism and a uniformly mixing mechanism;
the die casting mechanism comprises a rotating sleeve, the rotating sleeve is rotatably connected with a base mechanism through a bearing piece and can be driven by electric power and controlled to rotate at a speed of 60-150 rpm, the rotating sleeve is a cylindrical piece with an open top, a bushing is fixed in the rotating sleeve, a pressure plate is fixed on an opening at the top end of the rotating sleeve, a cavity for casting molten steel is arranged in the bushing, a bell-mouth-shaped guide hopper is arranged in the middle of the top surface of the bushing, a liquid injection port communicated with the cavity is arranged in the middle of the bottom end of the guide hopper, a circular window is arranged in the middle of the pressure plate, the diameter of the window corresponds to that of the top end of the guide hopper, a limit ring is fixed on the top port of the window, and the limit ring is a vertically extending ring-shaped piece,
mixing mechanism includes the stand that two relative mold casting mechanism symmetries set up between two parties, the top of stand is equipped with rather than normal running fit's pivot, the outer end of pivot is fixed with the slip cap, sliding fit has the slide bar in the slip cap, two horizontal pole fixed connection is passed through on the top of slide bar, the central authorities of horizontal pole are fixed with the puddler with the slide bar syntropy extension, the puddler is ceramic member, the bottom of puddler is equipped with the triangle-shaped thick liquid piece that can pass through the notes liquid mouth, the upper portion of slide bar is equipped with the dog of "< shape, the bottom side of dog is equipped with the right angle draw-in groove, the right angle draw-in groove cooperatees with the outer edge on spacing collar top side, when the outer edge of right angle draw-in groove card at the spacing collar, the vertical state of the outside of thick liquid piece for being close to the die cavity inner wall.
The base mechanism comprises a base table, a driving motor, a motor controller and a speed reducer are installed at the bottom of the base table, a bearing seat is arranged in the center of the base table, a main shaft is installed in the bearing seat and is in running fit with the base table through the bearing seat, the output shaft of the driving motor is connected with the main shaft through the speed reducer in a transmission mode, and the top end of the main shaft is fixedly connected with the center of the bottom surface of a rotating sleeve.
The novel bushing is characterized in that a cylindrical inner cavity is formed in the rotating sleeve, vertically extending protruding ribs are arranged on the side wall of the inner cavity, the shape of the bushing is matched with that of the inner cavity, the bushing is also a cylindrical lining piece, and through grooves movably connected with the protruding ribs in an inserting mode are formed in the side wall of the circumferential surface of the bushing.
The rotating speed of the die casting mechanism in a rotating state is 100 revolutions per minute.
The using method comprises the following steps:
starting the die casting mechanism to rotate, and pouring molten steel into the die cavity after the rotation is stable;
after casting is finished, operating the sliding rod to be in a vertical state and slide upwards until the pulp sheet can be positioned above the guide hopper;
the sliding rod is downwards slid to enable the stirring rod to be downwards inserted, after the pulp sheet passes through the liquid injection port, the sliding rod is immediately inclined, the right-angle clamping groove in the lower side of the stop block is clamped on the outer edge of the top side of the limiting ring, the state is kept for 30s, and the rotation of the die casting mechanism is gradually stopped;
after the mold casting mechanism stops rotating, the sliding rod is erected and slides upwards, the stirring rod is taken out, and standing molding is carried out.
Compared with the prior art, the invention has the beneficial effects that:
through the device, the better internal and external mixing effect of the outer layer adherence molten steel and the central molten steel can be realized after the molten steel is poured into the steel mould, so that the internal and external temperatures of the steel mould and the molten steel are consistent, and the problem of poor forming quality caused by the difference of the external and internal temperature gradients is solved.
Drawings
Fig. 1 is an overall schematic view (stirred state) of the present invention.
Fig. 2 is a schematic view of the present invention (non-inserted state).
Fig. 3 is a schematic structural view of the mold mechanism of the present invention.
Fig. 4 is a sectional view of the internal mechanism of the present invention.
Fig. 5 is an enlarged view of a portion of fig. 4 of the present invention.
Reference numerals shown in the drawings:
1. a base table; 2. rotating the sleeve; 3. pressing a plate; 4. a bushing; 5. an inner cavity; 6. convex edges; 7. a through groove; 8. a cavity; 9. a guide hopper; 10. a liquid injection port; 11. a window; 12. a limiting ring; 13. a column; 14. a rotating shaft; 15. a sliding sleeve; 16. a stirring rod; 17. pulp sheet; 18. a stopper; 19. a right-angle clamping groove; 20. a cross bar; 21. a slide bar.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
Unless otherwise specified, the instruments, reagents, materials and the like used in the following examples are conventional instruments, reagents, materials and the like known in the art and are commercially available. Unless otherwise specified, the experimental methods, detection methods, and the like described in the following examples are conventional experimental methods, detection methods, and the like in the prior art.
Example (b): small-size hot work die steel casting forming device
Comprises a base mechanism, a mold casting mechanism and a blending mechanism;
(1)
the base mechanism comprises a base platform 1 and a driving assembly, and particularly comprises a driving motor, a motor controller and a speed reducer which are all common power assemblies used for controlling rotation and mounted at the bottom of the base platform 1. And a bearing seat is arranged in the center of the base table 1 and is used for realizing running fit with a mold casting mechanism. A main shaft is installed in the bearing seat, the main shaft is in running fit with the base platform 1 through the bearing seat, and an output shaft of the driving motor is in transmission connection with the main shaft through a speed reducer. So that the main shaft attains a rotational speed of 100 rpm. And the process of mixing before casting and molding is carried out based on the rotating speed. And (4) uniformly mixing until the temperature of the bush 4 of the die casting mechanism is consistent with that of molten steel, and slowly decelerating to stop.
Although the above structure looks similar to a vertical centrifugal casting apparatus, the principle and effect are quite different. The centrifugal casting mould in the prior art realizes the casting of special-shaped castings or alloys with poor fluidity by means of high-speed rotation, the metal liquid is filled and solidified under the action of centrifugal force, the outer layer structure of the castings is compact, and the outward distribution and filling of the liquid metal are improved. But the segregation problem to be solved by my party is further increased.
The rotating speed of our part is low, so that the strong centrifugal force is avoided, the central molten steel and the adherent molten steel are mixed and stirred by matching with a mixing mechanism, and the molten steel does not rotate in the forming process, so that the vertical centrifugal casting machine is irrelevant.
This all around of base platform 1 has the supporting legs, the supporting legs is L type cross-section to 1 four corners position in the base platform of rectangle obtains firm fixed effect.
(2)
The mold casting mechanism comprises a rotating sleeve 2, a pressure plate 3 and a lining 4;
the rotating sleeve 2 is cylindrical, a cylindrical inner cavity 5 is formed in the rotating sleeve 2, the top of the inner cavity 5 is open, and the top surface of the rotating sleeve 2 is concentrically fixed with the pressure plate 3.
Be equipped with protruding stupefied 6 of vertical extension on the lateral wall of inner chamber 5, the appearance of bush 4 suits with the shape of inner chamber 5, so bush 4 also is cylindrical lining piece for it is thermal-insulated and obtain the die cavity 8 that makes the molten steel shaping in inside, be equipped with the logical groove 7 of pegging graft with protruding stupefied 6 activity on the global lateral wall of bush 4, lead to the vertical extension about groove 7, when bush 4 inserts inner chamber 5, protruding stupefied 6 inserts in leading to groove 7, realizes rotating the drive to bush 4 when cover 2 rotates.
The lining 4 is a detachable common lining 4 structure and is used for taking out an inner cast ingot.
A cylindrical cavity 8 is arranged in the bushing 4 and used for molten steel forming. The top surface of bush 4 is equipped with the direction fill 9 of horn mouth shape placed in the middle for obtain great accommodation range when pouring the molten steel, reduce and spatter outward, and to the downward water conservancy diversion of molten steel, the bottom of direction fill 9 is equipped with the notes liquid mouth 10 that is linked together with die cavity 8 placed in the middle, annotate liquid mouth 10 narrowness, help reducing the molten steel excessive, reduce the molten steel and stir danger when redundant.
The pressure disk 3 is equipped with circular shape window 11 in the middle of the upper portion, the diameter of window 11 corresponds with the diameter at direction fill 9 top for expose the direction fill 9 of below, be convenient for the casting. A limiting ring 12 is fixed on the top opening edge of the window 11, and the limiting ring 12 is a vertically extending annular part and is used for limiting the stirring position in cooperation with a blending mechanism.
(3)
Mixing mechanism includes two stand 13 that set up in the middle of relative mould mechanism symmetry, the top of stand 13 is equipped with rather than normal running fit's pivot 14, pivot 14 horizontal extension, the outer end of pivot 14 is fixed with sliding sleeve 15.
Mixing mechanism still includes porcelainous puddler 16, the bottom of puddler 16 is equipped with triangular's thick liquid piece 17, thick liquid piece 17 can insert and run through from annotating liquid mouth 10 and pass through, the upper portion of puddler 16 is equipped with the dog 18 of "< shape, the bottom side of dog 18 is equipped with right angle draw-in groove 19, right angle draw-in groove 19 cooperatees with the outer edge of spacing collar 12, when right angle draw-in groove 19 card is in the outer edge of spacing collar 12, the vertical state of the outside of thick liquid piece 17 for pressing close to 8 inner walls of die cavity can paste the inner wall of die cavity 8 and realize stirring redundantly to outer molten steel. Therefore, through the matching of the limiting ring 12 and the stop block 18, the optimal stirring position of the molten steel on the wall attaching part of the cavity 8 can be quickly found, the peripheral molten steel can be stirred to the center, the molten steel on the inner layer and the outer layer can be mixed, the temperature of the cavity 8, the temperature of the outer layer of the molten steel and the temperature of the center of the molten steel can be promoted to be uniform, and an inner and outer uniform temperature environment can be provided for subsequent forming.
The top of puddler 16 is equipped with rather than perpendicular fixed connection's horizontal pole 20, the central authorities of horizontal pole 20 and the fixed T type structure that forms in top of puddler 16, the both ends symmetry of horizontal pole 20 is fixed with the slide bar 21 with puddler 16 syntropy extension, slide bar 21 runs through sliding sleeve 15 and the two sliding fit. The guiding function of the stirring rod 16 is realized.
Through above-mentioned structure, the bilateral symmetry that slip cap 15 can be relative die casting mechanism sets up and rotatable to behind the casting molten steel, with slide bar 21 downwards, let puddler 16 insert the die cavity 8, behind thick liquid piece 17 through annotating liquid mouth 10, slope puddler 16 and the right angle draw-in groove 19 card that makes 18 bottom sides of dog are along the outer of spacing collar 12 top side, based on the slow rotation of die casting mechanism, thereby can obtain the inside and outside mixed effect that lets 8 adherence stirrings of relative die cavity of thick liquid piece 17. After stirring for about 30 seconds, the internal and external temperature gradients can be eliminated, the temperatures of the inner wall of the cavity 8, the outer layer molten steel and the central molten steel are consistent, the rotation of the die casting mechanism is stopped, and then the stirring rod is taken out to be formed in a standing mode. The stirring rod taken out can fall on one side or can be taken down to be placed at other positions to be cooled.
Claims (5)
1. A small-sized hot-working die steel casting forming device is characterized by comprising a base mechanism, a die casting mechanism and a uniformly mixing mechanism;
the die casting mechanism comprises a rotating sleeve, a pressure plate and a bushing, wherein the rotating sleeve is rotatably connected with a base mechanism through a bearing piece and is rotated at a rotating speed of 60-150 rpm based on electric drive and controlled, the rotating sleeve is a cylindrical piece with an open top, the bushing is fixed in the rotating sleeve, the pressure plate is fixed in an opening at the top end of the rotating sleeve, a cavity for casting molten steel is arranged in the bushing, a bell-mouthed guide hopper is arranged in the middle of the top surface of the bushing, a liquid injection port communicated with the cavity is arranged in the middle of the bottom end of the guide hopper, a circular window is arranged in the middle of the pressure plate, the diameter of the window corresponds to that of the top end of the guide hopper, a limit ring is fixed at the top port of the window, and the limit ring is an upright ring-shaped piece,
mixing mechanism includes the stand that two relative mold casting mechanism symmetries set up between two parties, the top of stand is equipped with rather than normal running fit's pivot, the outer end of pivot is fixed with the slip cap, sliding fit has the slide bar in the slip cap, two horizontal pole fixed connection is passed through on the top of slide bar, the central authorities of horizontal pole are fixed with the puddler with the slide bar syntropy extension, the puddler is ceramic member, the bottom of puddler is equipped with the triangle-shaped thick liquid piece that can pass through the notes liquid mouth, the upper portion of slide bar is equipped with the dog of "< shape, the bottom side of dog is equipped with the right angle draw-in groove, the right angle draw-in groove cooperatees with the outer edge on spacing collar top side, when the outer edge of right angle draw-in groove card at the spacing collar, the vertical state of the outside of thick liquid piece for being close to the die cavity inner wall.
2. The small hot-work die steel casting forming device according to claim 1, wherein the base mechanism comprises a base table, a driving motor, a motor controller and a speed reducer are mounted at the bottom of the base table, a bearing seat is arranged in the center of the base table, a main shaft is mounted in the bearing seat and rotatably matched with the base table through the bearing seat, an output shaft of the driving motor is in transmission connection with the main shaft through the speed reducer, and the top end of the main shaft is fixedly connected with the center of the bottom surface of the rotating sleeve.
3. The small hot-work die steel casting forming device as claimed in claim 1, wherein a cylindrical inner cavity is formed inside the rotating sleeve, a vertically extending protruding ridge is formed on a side wall of the inner cavity, the shape of the bushing is matched with the shape of the inner cavity, so that the bushing is also a cylindrical lining member, and a through groove which is movably inserted into the protruding ridge is formed in a side wall of the circumferential surface of the bushing.
4. The small hot-work die steel casting device according to claim 1, wherein the rotation speed of the die mechanism in a rotating state is 100 rpm.
5. The small hot-work die steel casting forming device according to claim 1, characterized in that the using method comprises the following steps:
starting the die casting mechanism to rotate, and pouring molten steel into the die cavity after the rotation is stable;
after casting is finished, operating the sliding rod to be in a vertical state and slide upwards until the pulp sheet can be positioned above the guide hopper;
the sliding rod is downwards slid to enable the stirring rod to be downwards inserted, after the pulp sheet passes through the liquid injection port, the sliding rod is immediately inclined, the right-angle clamping groove in the lower side of the stop block is clamped on the outer edge of the top side of the limiting ring, the state is kept for 30s, and the rotation of the die casting mechanism is gradually stopped;
and after the die casting mechanism stops rotating, erecting the sliding rod, sliding upwards to take out the stirring rod, and standing for forming.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111618129.5A CN114273625B (en) | 2021-12-27 | 2021-12-27 | Small-size hot work die steel casting forming device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111618129.5A CN114273625B (en) | 2021-12-27 | 2021-12-27 | Small-size hot work die steel casting forming device |
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| JP2002331354A (en) * | 2001-05-09 | 2002-11-19 | Mitsubishi Materials Corp | Manufacturing method for casting having fine unidirectional tesseral structure |
| JP3549054B2 (en) * | 2002-09-25 | 2004-08-04 | 俊杓 洪 | Method and apparatus for producing metallic material in solid-liquid coexistence state, method and apparatus for producing semi-solid metal slurry |
| US7712511B2 (en) * | 2005-03-15 | 2010-05-11 | The Japan Steel Works, Ltd. | Casting method and casting apparatus |
| CN102806322B (en) * | 2012-08-20 | 2014-04-30 | 东北大学 | Device and method for preparing large-size homogeneous steel ingot by stirring with self-consuming stirrer |
| CN102909322B (en) * | 2012-09-25 | 2015-01-07 | 北京科技大学 | Continuous production device for semisolid slurry |
| CN104226965B (en) * | 2013-06-19 | 2016-12-28 | 鞍钢股份有限公司 | Method and device for improving equiaxial crystal ratio of cast ingot solidification structure |
| CN207272100U (en) * | 2017-09-30 | 2018-04-27 | 和县华顺铸造有限公司 | A kind of metal mold for improving casting homogeneity |
| CN111842819A (en) * | 2020-08-26 | 2020-10-30 | 安徽林洪重工科技有限公司 | Ingot mold casting device based on flow field control and using method thereof |
| CN112705677B (en) * | 2020-12-16 | 2022-05-13 | 辽宁科技大学 | Device and method for rotary casting of metal ingot |
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