CN111014593B - Cover plate lifting control mechanism for ductile iron spheroidization and assembly operation method - Google Patents
Cover plate lifting control mechanism for ductile iron spheroidization and assembly operation method Download PDFInfo
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- CN111014593B CN111014593B CN202010144475.3A CN202010144475A CN111014593B CN 111014593 B CN111014593 B CN 111014593B CN 202010144475 A CN202010144475 A CN 202010144475A CN 111014593 B CN111014593 B CN 111014593B
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- cover plate
- spheroidizing
- molten iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a cover plate lifting control mechanism for spheroidizing ductile iron and an assembly operation method, and belongs to the field of ductile iron casting.
Description
Technical Field
The invention relates to a lifting control mechanism and an assembling and using method, in particular to a cover plate lifting control mechanism for spheroidizing ductile iron and an assembling and using method, and belongs to the field of ductile iron casting.
Background
At present, when ductile iron castings are produced in the casting industry, the main spheroidizing mode is still a flushing method spheroidizing process.
Fig. 6 is a schematic diagram of a prior art structure in which additives are added to the pit of the spheroidizing pack 10. The opposite position outside the spheroidizing ladle 10 is provided with a hanging shaft 16, the hanging shaft 16 is rotationally connected with a lifting part, the lifting part comprises a hanging rod 7 rotationally arranged on the hanging shaft 16, the upper end of the hanging rod 7 is provided with a hanging beam 2 in the horizontal direction, the middle position of the hanging beam 2 is provided with a hanging rod 1 for lifting the spheroidizing ladle 10, the procedure of manufacturing spheroidal graphite cast iron is that a ladle pit is formed in the ladle bottom of the spheroidizing ladle 10 by using refractory bricks and refractory mud to build a ladle pit dyke 15, spheroidizing alloy 12 is added into the pit in the spheroidizing ladle 10 and covered, the spheroidizing alloy is properly tamped, then molten iron is added, spheroidizing reaction and inoculation are carried out, and spheroidal graphite cast iron is formed.
The existing injection method spheroidizing process requires a relatively skilled experience for controlling the detonation time of spheroidizing reaction, at present, due to the fact that the casting industry has large personnel flow, once a skilled worker adjusts off the post, the quality requirements on operators are relatively strict, the operators are not well mastered, the reaction is too early or too late, and under the condition of too early reaction, bad spheroidization is caused due to less large magnesium evaporation loss of molten iron in a ladle; the spheroidization reaction time can be continued after the reaction, so that the molten iron is cooled to a larger extent and cannot be poured, or spheroidization reaction does not occur, and poor spheroidization is caused.
The control difficulty of the initiation time of the spheroidization reaction is reduced, the high-difficulty production is reduced to the general industrial variety through technical innovation, so that a general operator can also produce the ductile iron casting meeting the product requirement, and the method is suitable for the problem of large personnel flow in the casting industry and is a big subject faced by technicians.
Disclosure of Invention
Aiming at the requirements of operators on the control of the detonation time of the spheroidization reaction of the injection spheroidization process in the casting process
The cover plate lifting control mechanism for spheroidizing the ductile iron and the assembly and use method are provided, and the cover plate lifting control mechanism aims to reduce the difficulty of spheroidizing process by a ductile iron flushing method, reduce the technical proficiency of operators, stabilize the continuous production of spheroidal graphite cast iron and adapt to the current situation of large personnel flow in the casting industry.
The technical scheme of the invention is as follows: the utility model provides a ductile iron spheroidization is with apron lifting control mechanism, includes the spheroidization package outside and rotates the hoisting part that sets up, and hoisting part includes hanging beam, its characterized in that: the bottom of the spheroidizing ladle is provided with a spheroidizing pit, a cover plate is arranged on the spheroidizing pit, a pressing rod is fixedly connected to the upper vertical direction of the center of the cover plate, the upper end of the pressing rod extends to the side surface of a lifting beam of a lifting component during lifting, a cover plate opening and closing device is arranged at the staggered position of the pressing rod and the lifting beam, and a refractory layer is arranged on the outer surfaces of the cover plate and the pressing rod;
the lower end part of the pressure rod is provided with threads, the center of the cover plate is provided with a connecting hole, the cover plate is fixed with the pressure rod by a nut, the end part of the pressure rod on the lower surface of the cover plate and the surface of the nut are covered with a fire-resistant layer, and the surface of the cover plate is fixed with a high-temperature-resistant material;
the main body of the compression bar is a steel pipe, refractory clay is filled in the steel pipe, and a ceramic pipe is sleeved on the periphery of the steel pipe above the cover plate;
the cover plate opening and closing device comprises a clamping plate, the clamping plate is rotatably arranged on the periphery of the pressure rod through a clamping plate fixing piece, the upper side of the clamping plate is inclined, a traction hook is arranged on one side of the vertical side of the higher side of the inclined side, a manual pull rod is arranged in the traction hook in a matched mode, and a drag hook is arranged at the end of the manual pull rod;
the vertical edge of the clamping plate is fixedly arranged at one side of the outer end of the clamping plate fixing piece according to a certain angle, the vertical edge of the inner end of the clamping plate fixing piece is fixed at the periphery of a steel sleeve vertical to the axis, the steel sleeve is rotatably arranged at the periphery of a compression bar, and a blocking sleeve is arranged at the periphery of the compression bar at the lower side of the steel sleeve;
the height corresponding to any position on the inclined edge of the clamping plate is consistent with the height of the lower edge of the hanging beam;
the radial direction of the retaining sleeve is provided with an adjusting screw, the adjusting screw locks the retaining sleeve on the pressure rod, and the height of the retaining sleeve along the vertical direction of the pressure rod is adjustable.
The assembling and operating method of the cover plate lifting control mechanism for spheroidizing the ductile iron utilizes the cover plate lifting control mechanism for spheroidizing the ductile iron, and comprises the following specific use steps:
1) Manufacturing a cover plate in a refractory product factory according to the design size and shape, wherein a hole for installing a compression bar is formed in the center of the cover plate, cutting a steel pipe according to the design length, machining standard threads on the head of the steel pipe, and installing a cover plate opening and closing device at the tail end of the steel pipe;
2) And (3) assembling: filling a steel pipe into a hole of a cover plate made of a refractory product, tightening a nut, plugging the steel pipe by refractory clay, sleeving the steel pipe into a high-temperature-resistant ceramic pipe, filling the refractory clay into the steel pipe, and sequentially installing a retaining sleeve, an adjusting screw, a clamping plate fixing piece and a steel sleeve assembly at the top of a compression bar, wherein the whole compression bar assembly is manufactured;
3) Baking the spheroidizing ladle to the required temperature, smelting molten iron, loading spheroidizing alloy and covering agent into a spheroidizing pit at the bottom of the spheroidizing ladle, pressing the manufactured cover plate assembly on the top of the spheroidizing alloy in the spheroidizing ladle pit, enabling a pressing rod to be vertical, tightly covering a gap between the cover plate and the spheroidizing ladle wall by using refractory rock wool, and locking a clamping plate;
4) After molten iron is smelted, hanging the spheroidizing ladle at a proper position in front of a furnace, spheroidizing the molten iron, opening a clamping plate after the molten iron is discharged to the required molten iron amount in the spheroidizing ladle, and automatically floating the cover plate assembly under the action of buoyancy of the molten iron due to lighter specific gravity than the molten iron, so that spheroidized alloy contacts with the molten iron to start reaction;
5) Before the clamping plate is opened, the alloy in the pit bottom of the spheroidizing pit of the spheroidizing ladle is tightly pressed by the cover plate and cannot react with molten iron, and after the molten iron reaches the required amount, the clamping plate is manually opened, the cover plate floats upwards, and the alloy starts to react with the molten iron in a contact manner;
6) Pouring according to a normal process after the spheroidizing reaction is finished; and (5) cooling to a specified temperature, and opening the box, removing sand, cleaning and polishing to obtain qualified ductile cast iron product parts.
The invention has the positive effects that: by arranging a spheroidizing pit at the bottom of the spheroidizing ladle, the spheroidizing pit is provided with
The cover plate is beneficial to preventing molten iron from prematurely reacting with the nodulizer to cause splashing and magnesium evaporation loss, thereby causing bad nodulizing; the fire-resistant layer is arranged on the outer surfaces of the cover plate and the compression bar; when the molten iron is added into the spheroidizing ladle, the cover plate and the compression bar are melted or deformed, the heat insulation effect can be achieved, the cover plate can be prevented from being floated by the molten iron through arranging the opening and closing device at the staggered position of the compression bar and the hanging beam, the reaction between the molten iron and the spheroidizing agent can be prevented from being performed prematurely, the opening and closing device can be opened manually at proper time, the cover plate is floated by the molten iron, and spheroidizing is started; the invention can effectively control the spheroidizing reaction time, achieve the technical requirements of the process, stabilize the spheroidizing reaction, reduce the magnesium loss in the spheroidizer, prevent bad spheroidization, improve the spheroidization rate and ensure the quality of spheroidal graphite cast iron.
Drawings
FIG. 1 is a schematic diagram showing the specific structure of a cover plate and a lifting control mechanism in a spheroidizing ladle according to the present invention. .
Fig. 2 is a schematic structural diagram of a cover plate lifting control mechanism.
Fig. 3 is a schematic view of the structure along the direction a in fig. 2.
Fig. 4 is a schematic view of the structure along the direction K-K in fig. 2.
Fig. 5 is a schematic view of the structure along the direction H-H in fig. 2.
FIG. 6 is a schematic diagram of a prior art structure in which additives are added to a spheroidized ladle pit.
Description of the reference numerals: 1-lifting bar, 2-lifting beam, 3-clamping plate, 3 a-clamping plate fixing piece, 3 b-traction hook, 4-blocking sleeve, 5-adjusting screw, 6-steel sleeve, 7-suspender, 8-ceramic tube, 9-compression bar, 10-spheroidizing bag, 11-cover plate, 12-spheroidizing alloy, 13-refractory mortar, 14-nut, 15-bag pit dykes and dams and 16-hanging shaft.
Detailed Description
The following describes the specific technical scheme of the present invention in detail with reference to the accompanying drawings.
FIG. 1 shows a cover plate lifting control mechanism for spheroidizing ductile iron, which is a cover plate and a cover plate in a spheroidizing ladle according to the present invention
The specific structure of the lifting control mechanism is schematically shown. Fig. 2 is a schematic structural view of the cover plate lifting control mechanism. The cover plate lifting control mechanism comprises a lifting part rotationally arranged on the outer side of the spheroidizing ladle 10, the lifting part comprises a hanging beam 2, a spheroidizing pit is arranged at the bottom of the spheroidizing ladle 10, a cover plate 11 is arranged on the spheroidizing pit, a pressing rod is fixedly connected to the upper vertical direction of the center of the cover plate 11, the upper end of the pressing rod 9 extends to the side surface of the hanging beam 2 of the lifting part during lifting, a cover plate opening and closing device is arranged at the staggered position of the pressing rod 9 and the hanging beam 2, and a refractory layer is arranged on the outer surfaces of the cover plate 11 and the pressing rod 9;
referring to fig. 2, the lower end of the compression bar 9 is provided with threads, the center of the cover plate 11 is provided with a connecting hole, the cover plate 11 and the compression bar 9 are fixed by a nut 14, the end of the compression bar 9 on the lower surface of the cover plate 11 and the surface of the nut 14 are covered with a refractory layer, the refractory layer is made of refractory materials such as refractory clay, and the surface of the cover plate 11 is fixed with high-temperature-resistant rock wool.
The main body of the compression bar 9 is a steel pipe, refractory clay 13 is filled in the steel pipe, and a ceramic pipe 8 is sleeved on the periphery of the steel pipe above the cover plate 11.
Fig. 3 is a schematic view of the structure along the direction a in fig. 2. Fig. 4 is a schematic view of the structure along the direction K-K in fig. 2. Fig. 5 is a schematic view of the structure along the direction H-H in fig. 2. The cover plate opening and closing device comprises a clamping plate 3, the clamping plate 3 is rotatably arranged on the periphery of a pressing rod 9 through a clamping plate fixing piece 3a and a steel sleeve 6, the upper edge of the clamping plate 3 is an inclined edge, a traction hook 3b is arranged on the vertical edge of the higher side of the inclined edge of the clamping plate 3, a manual pull rod is matched with the traction hook 3b, and a drag hook is arranged at the end part of the manual pull rod.
The height of any position on the inclined edge is consistent with the height of the lower edge of the hanging beam 2, referring to fig. 3, 4 and 5, the vertical edge of the clamping plate 3 is fixedly arranged on one side of the outer end of the clamping plate fixing piece 3a according to a certain angle, the vertical edge of the inner end of the clamping plate fixing piece 3a is fixedly arranged on the periphery of the steel sleeve 6 with the vertical axis, the steel sleeve 6 is rotatably arranged on the periphery of the pressing rod 9, and the periphery of the pressing rod 9 under the steel sleeve 6 is provided with a blocking sleeve 4. When the cover plate opening and closing device is closed, the clamping plate 3 is rotated, the higher side of the inclined side of the clamping plate 3 is clamped at the lower side of the hanging beam 2, when the cover plate opening and closing device is opened, the matched traction rod is used for hooking the traction hook 3b, the clamping plate 3 is rotated away from the lower side of the hanging beam 2, the cover plate assembly is floated by the buoyancy of molten iron, the molten iron enters the pit of the spheroidizing ladle 10, and the molten iron reacts with a spheroidizing agent to start spheroidizing.
The lower end part of the pressure rod is provided with threads, the center of the cover plate is provided with a connecting hole, the cover plate is fixed with the pressure rod by using a nut, the end part of the pressure rod on the lower surface of the cover plate and the surface of the nut are covered with a fire-resistant layer, and the surface of the cover plate is fixed with high-temperature-resistant rock wool; referring to fig. 3, 4 and 5, an adjusting screw 5 is arranged on the radial direction of the retaining sleeve 4, the adjusting screw 5 locks the retaining sleeve 4 on a proper position of the pressure rod 9, and the height of the retaining sleeve 4 along the vertical direction of the pressure rod 8 is adjustable.
The specific implementation steps are as follows:
1) The cover plate 11 is manufactured in the fire-resistant product factory according to the design size and shape, the center of the cover plate 11 is provided with a hole for installing the compression bar 9,
cutting a steel pipe according to the design length, machining standard threads on the head of the steel pipe, and installing an opening and closing device on the tail end of the steel pipe;
2) Combination: the steel pipe 6 is put into a hole of a cover plate 11 made of refractory products, a nut 14 is tightened, the steel pipe is plugged by refractory clay 13, then the steel pipe is sleeved into a high-temperature resistant ceramic pipe 8, the refractory clay 13 is filled in the steel pipe, a retaining sleeve 4 and an adjusting screw 5 are sequentially arranged at the top of a pressing rod, and the clamping plate 3, a clamping plate fixing piece 3a and a steel sleeve assembly are assembled, so that the whole pressing rod 9 assembly is manufactured;
3) Baking the spheroidizing ladle 10 to a required temperature, smelting molten iron, filling a ladle pit with a spheroidal alloy 12, a covering agent and the like, pressing the manufactured cover plate assembly on the top of the spheroidizing alloy 12 in the ladle pit, enabling a pressing rod 9 to be vertical, tightly covering a gap between the cover plate and the ladle wall by refractory rock wool, and locking a clamping plate 3;
4) After molten iron is melted, the spheroidizing ladle 11 is hung at a proper position in front of a furnace, the molten iron is spheroidized, and the molten iron is discharged
After the required molten iron amount in the spheroidizing ladle 11 is obtained, the clamping plate 3 is opened, and the cover plate assembly automatically floats upwards under the action of molten iron buoyancy due to lighter specific gravity than molten iron, so that the spheroidized alloy 12 contacts with the molten iron to start reaction;
4) Before the clamping plate 3 is opened, the alloy in the ladle pit is tightly pressed by the cover plate 11 and does not react with molten iron obviously, after the molten iron reaches the required quantity, the clamping plate 3 is manually opened, the cover plate 11 floats upwards, and the alloy starts to react with the molten iron in a contact way, so the process achieves the aim of controllable initiation time of spheroidizing reaction, thereby guaranteeing spheroidizing quality and obtaining ideal effect;
5) Pouring according to a normal process after the spheroidizing reaction is finished; and (5) cooling to a specified temperature, and opening the box, removing sand, cleaning and polishing to obtain qualified ductile cast iron product parts.
Specific examples:
1) The capacity of the spheroidizing ladle 11 of the company is 1.5 tons, a refractory material product factory is entrusted to manufacture a high-magnesium refractory cover plate 11, the size of the cover plate 11 is manufactured according to the horizontal plane of a ladle bottom pit, the thickness of the cover plate 11 is 40mm, a mounting hole is reserved in the center, a steel pipe with the outer diameter of 3/4 inch is adopted, an M26 bolt is welded at the lower end part of the steel pipe, an assembly nut is matched, a refractory ceramic pipe 8 with the inner diameter of 40mm is sleeved outside the steel pipe, refractory materials are filled in the spheroidizing ladle 10, and rock wool materials are used in the embodiment;
2) Firing the spheroidizing ladle 11 to a desired temperature while melting molten iron, and charging the ladle bottom with the spheroidal graphite alloy 12 and the molten iron
A cover agent and the like, wherein a plate 11 of a cover plate opening and closing device consisting of a clamping plate 3, a ceramic tube 8, a pressing rod 9, a cover plate 11, fire clay 13, a nut 14 and the like is pressed on the top of a spheroidized alloy 12 in a ladle pit, the pressing rod 9 is vertical, and a gap between the cover plate 11 and the ladle wall can be tightly covered by fire-resistant rock wool to lock the clamping plate 3;
3) After molten iron is melted, the spheroidizing ladle 11 is hung at a proper position in front of a furnace, the molten iron is spheroidized, and the molten iron is discharged
After 1200kg, the clamping plate 3 is opened, and the cover plate assembly automatically floats under the buoyancy of molten iron because of lighter specific gravity than the molten iron, the spheroidized alloy 12 contacts with the molten iron to start reaction, the reaction time lasts for 115 seconds, and after the reaction is basically stable, 300kg of molten iron is discharged and inoculated;
4) After the spheroidizing treatment is finished, casting is carried out according to a normal process, after the temperature is reduced to a specified temperature, the casting is carried out, qualified spheroidal graphite cast iron product parts are obtained, the spheroidization rate of the test sample spheroidal graphite cast iron is 92%, the second grade is achieved, the mechanical property reaches the tensile strength of 526MPa, the yield strength of 342MPa, the elongation of 18% is far higher than the national standard and the user requirement, and the good effect of super-high strength and super-high toughness is achieved.
According to the invention, the bottom of the spheroidizing ladle 10 is provided with the spheroidizing pit, and the cover plate 11 is arranged on the spheroidizing pit, so that molten iron can be prevented from prematurely reacting with a spheroidizing agent to cause splashing and magnesium evaporation loss, thereby causing bad spheroidization; the cover plate 11 may be opened at a proper time to allow the molten iron to react with the nodulizer; the fire-resistant layer is arranged on the outer surfaces of the cover plate 11 and the compression bar 9; when molten iron is prevented from being added into the spheroidizing ladle 10, the cover plate 11 and the compression bar 9 are melted or deformed, the heat insulation effect can be achieved, the cover plate 11 can be prevented from being lifted in advance by the molten iron through arranging the opening and closing device at the staggered position of the compression bar 9 and the hanging beam 2, the reaction between the molten iron and the spheroidizing agent can be prevented too early, the opening and closing device can be opened timely and manually, the cover plate 11 is lifted by the molten iron, and spheroidizing is started; the invention can effectively control the spheroidization reaction time and meet the technical requirements of the process.
Claims (2)
1. The utility model provides a ductile iron spheroidization is with apron lifting control mechanism, includes the spheroidization package outside and rotates the hoisting part that sets up, and hoisting part includes hanging beam, its characterized in that: the bottom of the spheroidizing ladle is provided with a spheroidizing pit, a cover plate is arranged on the spheroidizing pit, a pressing rod is fixedly connected to the upper vertical direction of the center of the cover plate, the upper end of the pressing rod extends to the side surface of a lifting beam of a lifting component during lifting, a cover plate opening and closing device is arranged at the staggered position of the pressing rod and the lifting beam, and a refractory layer is arranged on the outer surfaces of the cover plate and the pressing rod;
the lower end part of the pressure rod is provided with threads, the center of the cover plate is provided with a connecting hole, the cover plate is fixed with the pressure rod by a nut, the end part of the pressure rod on the lower surface of the cover plate and the surface of the nut are covered with a fire-resistant layer, and the surface of the cover plate is fixed with a high-temperature-resistant material;
the main body of the compression bar is a steel pipe, refractory clay is filled in the steel pipe, and a ceramic pipe is sleeved on the periphery of the steel pipe above the cover plate;
the cover plate opening and closing device comprises a clamping plate, the clamping plate is rotatably arranged on the periphery of the pressure rod through a clamping plate fixing piece, the upper side of the clamping plate is inclined, a traction hook is arranged on one side of the vertical side of the higher side of the inclined side, a manual pull rod is arranged in the traction hook in a matched mode, and a drag hook is arranged at the end of the manual pull rod;
the vertical edge of the clamping plate is fixedly arranged at one side of the outer end of the clamping plate fixing piece according to a certain angle, the vertical edge of the inner end of the clamping plate fixing piece is fixed at the periphery of a steel sleeve vertical to the axis, the steel sleeve is rotatably arranged at the periphery of a compression bar, and a blocking sleeve is arranged at the periphery of the compression bar at the lower side of the steel sleeve;
the height corresponding to any position on the inclined edge of the clamping plate is consistent with the height of the lower edge of the hanging beam;
the radial direction of the retaining sleeve is provided with an adjusting screw, the adjusting screw locks the retaining sleeve on the pressure rod, and the height of the retaining sleeve along the vertical direction of the pressure rod is adjustable.
2. A method for assembling and operating a cover plate lifting control mechanism for spheroidizing ductile iron, which is characterized by using the cover plate lifting control mechanism for spheroidizing ductile iron according to claim 1, comprising the following steps: the specific using steps are as follows:
1) Manufacturing a cover plate in a refractory product factory according to the design size and shape, wherein a hole for installing a compression bar is formed in the center of the cover plate, cutting a steel pipe according to the design length, machining standard threads on the head of the steel pipe, and installing a cover plate opening and closing device at the tail end of the steel pipe;
2) And (3) assembling: filling a steel pipe into a hole of a cover plate made of a refractory product, tightening a nut, plugging the steel pipe by refractory clay, sleeving the steel pipe into a high-temperature-resistant ceramic pipe, filling the refractory clay into the steel pipe, and sequentially installing a retaining sleeve, an adjusting screw, a clamping plate fixing piece and a steel sleeve assembly at the top of a compression bar, wherein the whole compression bar assembly is manufactured;
3) Baking the spheroidizing ladle to the required temperature, smelting molten iron, loading spheroidizing alloy and covering agent into a spheroidizing pit at the bottom of the spheroidizing ladle, pressing the manufactured cover plate assembly on the top of the spheroidizing alloy in the spheroidizing ladle pit, enabling a pressing rod to be vertical, tightly covering a gap between the cover plate and the spheroidizing ladle wall by using refractory rock wool, and locking a clamping plate;
4) After molten iron is smelted, hanging the spheroidizing ladle at a proper position in front of a furnace, spheroidizing the molten iron, opening a clamping plate after the molten iron is discharged to the required molten iron amount in the spheroidizing ladle, and automatically floating the cover plate assembly under the action of buoyancy of the molten iron due to lighter specific gravity than the molten iron, so that spheroidized alloy contacts with the molten iron to start reaction;
5) Before the clamping plate is opened, the alloy in the pit bottom of the spheroidizing pit of the spheroidizing ladle is tightly pressed by the cover plate and cannot react with molten iron, and after the molten iron reaches the required amount, the clamping plate is manually opened, the cover plate floats upwards, and the alloy starts to react with the molten iron in a contact manner;
6) Pouring according to a normal process after the spheroidizing reaction is finished; and (5) cooling to a specified temperature, and opening the box, removing sand, cleaning and polishing to obtain qualified ductile cast iron product parts.
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| CN202010144475.3A CN111014593B (en) | 2020-03-04 | 2020-03-04 | Cover plate lifting control mechanism for ductile iron spheroidization and assembly operation method |
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| CN202010144475.3A CN111014593B (en) | 2020-03-04 | 2020-03-04 | Cover plate lifting control mechanism for ductile iron spheroidization and assembly operation method |
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| CN102021468A (en) * | 2010-10-25 | 2011-04-20 | 刘年路 | Smokeless spheroidizing method |
| JP2017214639A (en) * | 2016-06-01 | 2017-12-07 | 宮内 啓次 | Cover material, spheroidizing agent and desulfurization agent for sandwich method |
| CN110395524A (en) * | 2019-06-26 | 2019-11-01 | 浙江高人道具有限公司 | A kind of positioning clamping device of clothes showing shelf |
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