CN115158997A - Double-metal liquid composite casting spiral auger and manufacturing method thereof - Google Patents
Double-metal liquid composite casting spiral auger and manufacturing method thereof Download PDFInfo
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- CN115158997A CN115158997A CN202210834852.5A CN202210834852A CN115158997A CN 115158997 A CN115158997 A CN 115158997A CN 202210834852 A CN202210834852 A CN 202210834852A CN 115158997 A CN115158997 A CN 115158997A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
- B65G33/26—Screws
- B65G33/265—Screws with a continuous helical surface
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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
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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Abstract
The invention provides a double metal liquid composite casting spiral auger and a manufacturing method thereof, and relates to the technical field of spiral auger processing. The spiral auger body, spiral auger body include installation department, propulsion section and compression section, and the installation department is located the tip of propulsion section, propulsion section and compression section fixed connection. According to the characteristics of the spiral auger, the spiral auger is divided into a propelling section and a compressing section, the propelling section has small material extrusion force and slow abrasion, and carbon steel or low alloy steel is adopted; the compression section has large extrusion force of materials, and the abrasion block is formed by composite casting of high-chromium cast iron and carbon steel or low-alloy steel; the installation part is arranged on the propelling section, and the carbon steel or low alloy steel is adopted, so that the part is easy to process, safe and firm to install, and is not easy to loosen, crack and the like; and the invention ensures that the installation part of the spiral auger is safe and firm and the compression section is wear-resistant and durable by the advantages of drawing carbon steel and high-chromium cast iron through the liquid-liquid composition of the bimetal.
Description
Technical Field
The invention relates to the technical field of spiral auger processing, in particular to a bimetal liquid composite casting spiral auger and a manufacturing method thereof.
Background
The spiral auger is an important part of a material propelling and feeding system, and is widely applied to the fields of mines, brick machines, wood working machinery and the like. Spiral auger of 3 types of materials is mainly divided on the existing market:
carbon steel or low alloy steel material: the spiral auger material has good toughness, low cost, easy manufacture, safe and firm end mounting part, difficult loosening and cracking of a mounting screw hole and the like. However, no matter the spiral auger is welded or the spiral auger is cast, wear-resistant welding rods need to be additionally coated and welded, the service life of the spiral auger is short, and the wear-resistant welding rods need to be additionally coated and disassembled after later use and abrasion.
Stainless steel material: the material of the spiral auger is high in cost, the wear resistance is slightly superior to that of a carbon steel spiral auger, but the service life of the spiral auger still does not meet the requirements of customers.
The high-chromium cast iron material: the spiral auger material has moderate cost, high hardness and good wear resistance, and is obviously superior to the two materials. However, the high-chromium cast iron material has high hardness and high brittleness, is not easy to process, is easy to loosen, crack and the like at the mounting part at the end part, often causes how much the spiral auger is not worn down, the whole spiral auger part is scrapped, and the use cost of a client is higher.
Therefore, in view of the deficiencies of the prior art, it is desirable to provide a spiral auger compositely cast with bimetal and a method for manufacturing the same that solve the problems set forth in the background art.
Disclosure of Invention
The invention aims to provide a double-metal liquid composite casting spiral auger and a manufacturing method thereof, which can provide a solution for overcoming the defects in the prior art, have the advantages of drawing carbon steel and high-chromium cast iron, and ensure that the installation part of the spiral auger is safe and firm, the compression section is wear-resistant and durable and the like through double-metal liquid composite.
The embodiment of the invention provides a double-metal liquid composite casting spiral auger which comprises a spiral auger body, wherein the spiral auger body comprises an installation part, a propelling section and a compression section, the installation part is positioned at the end part of the propelling section, and the propelling section is fixedly connected with the compression section.
In some embodiments of the present invention, the propulsion section is cast from carbon steel or low alloy steel, and the compression section is cast from high chromium cast iron in combination with carbon steel or low alloy steel.
The embodiment of the invention also provides a manufacturing method of the spiral auger through double metal liquid composite casting, which comprises the following steps:
manufacturing a lost foam model of the spiral auger according to the size requirement and the shape requirement of the spiral auger, and placing the lost foam model in a sand box for vacuumizing and shaping; wherein the lost foam model comprises a propulsion section model and a compression section model;
respectively calculating the weight of the molten steel in the propulsion section and the weight of the molten steel in the compression section according to the size requirement and the shape requirement of the spiral auger; the molten steel of the propulsion section adopts carbon steel liquid or low alloy steel liquid, and the molten steel of the compression section adopts high-chromium cast iron liquid; comprises two molten steel, namely carbon steel molten steel or low alloy steel molten steel and high-chromium cast iron molten steel;
pouring the carbon steel liquid or the low alloy steel liquid into a propulsion section model from a casting head through a step pouring channel to obtain a propulsion section; the carbon steel liquid or the low alloy steel liquid and the high chromium cast iron liquid are sequentially poured into a compression section model through a step pouring gate from a casting head to obtain a compression section; wherein the compression section comprises a carbon steel or low alloy steel portion and a high chromium cast iron portion;
and (4) carrying out a heat treatment process on the molded spiral auger after cooling and molding.
In some embodiments of the invention, the propulsion section model and the compression section model are an integral model;
or the propulsion section model and the compression section model are two independent models.
In some embodiments of the present invention, the step of performing a heat treatment process on the molded spiral auger after the cooling molding comprises:
when the propulsion section model and the compression section model are integrated models, the molded spiral auger is sequentially subjected to annealing, quenching and tempering;
when the propulsion section model and the compression section model are two independent models, respectively carrying out annealing treatment on the formed propulsion section and the compression section;
sequentially quenching and tempering the high-chromium cast iron part of the compression section;
and fixedly connecting the propulsion section and the compression section after heat treatment to form the whole section of the spiral auger.
In some embodiments of the present invention, when the propulsion section model and the compression section model are an integral model, the step of sequentially annealing, quenching and tempering the formed spiral auger comprises:
and annealing the formed spiral auger in sequence, aligning the annealed spiral auger on a machine tool for coaxiality correction, and quenching and tempering the aligned spiral auger in sequence.
In some embodiments of the present invention, the step of fixedly connecting the propulsion section and the compression section after the heat treatment to form an integral section of the screw auger comprises:
placing the propulsion section after heat treatment on a machine tool to process a connecting hole;
placing the compression section after heat treatment on a machine tool to machine a connecting pin, wherein the connecting pin is matched with the connecting hole; wherein the connecting pin is located in the carbon steel or low alloy steel portion of the compression section;
and butting the propulsion section with the compression section, and fixing by welding to form the whole section of the spiral auger.
In some embodiments of the present invention, the annealing process comprises: heating to 880 ℃ at the temperature of 110 ℃/h, preserving heat for 4h at 880 ℃, and cooling to room temperature along with the furnace.
In some embodiments of the present invention, the quenching process comprises: heating to 650 ℃ at a speed of 80 ℃/h, preserving heat for 3h at 650 ℃, heating to 980 ℃ at a speed of 120 ℃/h, preserving heat for 3h at 980 ℃, and finally air-cooling to room temperature.
In some embodiments of the present invention, the tempering process comprises: heating to 400 ℃ at the temperature of 80 ℃/h, preserving the heat for 4h at the temperature of 400 ℃, and finally cooling to room temperature in air.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
according to the invention, the spiral auger body comprises an installation part, a propelling section and a compression section, wherein the installation part is positioned at the end part of the propelling section, and the propelling section is fixedly connected with the compression section. Manufacturing a lost foam model of the spiral auger according to the size requirement and the shape requirement of the spiral auger, and placing the lost foam model in a sand box for vacuum pumping and shaping; wherein the lost foam model comprises a propulsion section model and a compression section model; respectively calculating the weight of the molten steel in the propulsion section and the weight of the molten steel in the compression section according to the size requirement and the shape requirement of the spiral auger; the molten steel of the propulsion section adopts carbon steel liquid or low alloy steel liquid, and the molten steel of the compression section adopts high-chromium cast iron liquid; comprises two molten steel, namely carbon steel molten steel or low alloy steel molten steel and high-chromium cast iron molten steel; pouring the molten carbon steel or the molten low alloy steel into a propulsion section model from a casting head through a stepped pouring gate to obtain a propulsion section; pouring the carbon steel liquid or the low alloy steel liquid and the high chromium cast iron liquid into a compression section model from a casting head through a stepped pouring gate in sequence to obtain a compression section; wherein the compression section comprises a carbon steel or low alloy steel portion and a high chromium cast iron portion; and (4) carrying out a heat treatment process on the molded spiral auger after cooling and molding. According to the characteristics of the spiral auger, the spiral auger is divided into a propelling section and a compression section, the propelling section has small material extrusion force and slow abrasion, and carbon steel or low alloy steel is adopted; the compression section has large extrusion force of materials, and the abrasion block is formed by composite casting of high-chromium cast iron and carbon steel or low-alloy steel; the installation part is arranged on the propelling section, and the carbon steel or low alloy steel is adopted, so that the part is easy to process, safe and firm to install, and is not easy to loosen, crack and the like; and the invention ensures that the installation position of the spiral auger is safe and firm and the compression section is durable in wear resistance by the advantages of drawing carbon steel and high-chromium cast iron through the bimetal liquid-liquid compounding.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a spiral auger compositely cast with bimetal liquid according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a casting structure of a spiral auger compositely cast with bimetal liquid according to an embodiment of the present invention;
FIG. 3 is a flow chart showing the steps of a method for compositely casting a spiral auger by using a bimetal liquid in the embodiment of the invention.
Reference numerals: 1. an installation part; 2. a propulsion section; 3. a compression section; 4. casting a dead head; 5. a carbon steel runner; 6. a high chromium runner.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not require that the components be absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, "a plurality" means at least 2.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
As shown in fig. 1 to 3, fig. 1 is a schematic structural diagram of a spiral auger compositely cast with molten bimetal according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a casting structure of a spiral auger compositely cast with bimetal liquid according to an embodiment of the present invention; FIG. 3 is a flow chart showing steps of a process for compositely casting a spiral auger by using a bimetal liquid according to an embodiment of the invention;
the embodiment of the application provides a bimetal liquid composite casting spiral auger, including the spiral auger body, the spiral auger body includes installation department 1, propulsion section 2 and compression section 3, and installation department 1 is located the tip of propulsion section 2, propulsion section 2 and 3 fixed connection of compression section.
The propulsion section 2 is cast by carbon steel or low alloy steel, and the compression section 3 is cast by high chromium cast iron and carbon steel or low alloy steel.
The embodiment of the application also provides a manufacturing method of the spiral auger compositely cast by the bimetal liquid, which comprises the following steps:
s110, manufacturing a lost foam model of the spiral auger according to the size requirement and the shape requirement of the spiral auger, and placing the lost foam model in a sand box for vacuum pumping and shaping; the lost foam model comprises a propulsion section model and a compression section model;
s120, respectively calculating the weight of the molten steel of the propulsion section 2 and the weight of the molten steel of the compression section 3 according to the size requirement and the shape requirement of the spiral auger; wherein the molten steel of the propulsion section 2 adopts carbon steel molten steel or low alloy steel molten steel, and the molten steel of the compression section 3 adopts high-chromium cast iron molten steel; comprises two molten steel of carbon steel or low alloy steel and high chromium cast iron;
s130, pouring molten carbon steel or molten low alloy steel into the propulsion section model from the casting head 4 through a stepped pouring channel to obtain a propulsion section 2; two kinds of molten steel, namely carbon steel molten steel or low alloy steel molten steel and high-chromium cast iron molten steel, are sequentially poured into the compression section model through a step pouring gate from a casting head 4 to obtain a compression section 3; wherein the compression section 3 comprises a carbon steel or low alloy steel portion and a high chromium cast iron portion;
and S140, carrying out a heat treatment process on the formed spiral auger after cooling and forming.
According to the invention, the spiral auger body comprises an installation part 1, a propulsion section 2 and a compression section 3, wherein the installation part 1 is positioned at the end part of the propulsion section 2, and the propulsion section 2 is fixedly connected with the compression section 3. Manufacturing a lost foam model of the spiral auger according to the size requirement and the shape requirement of the spiral auger, and placing the lost foam model in a sand box for vacuum pumping and shaping; the lost foam model comprises a propulsion section model and a compression section model; respectively calculating the weight of the molten steel of the propulsion section 2 and the weight of the molten steel of the compression section 3 according to the size requirement and the shape requirement of the spiral auger; wherein the molten steel of the propulsion section 2 adopts carbon steel molten steel or low alloy steel molten steel, and the molten steel of the compression section 3 adopts high-chromium cast iron molten steel; comprises two molten steel of carbon steel or low alloy steel and high chromium cast iron; pouring carbon steel liquid or low alloy steel liquid into the propulsion section model from a casting head 4 through a step pouring channel to obtain a propulsion section 2; two kinds of molten steel, namely carbon steel molten steel or low alloy steel molten steel and high-chromium cast iron molten steel, are sequentially poured into the compression section model through a step pouring gate from a casting head 4 to obtain a compression section 3; wherein the compression section 3 comprises a carbon steel or low alloy steel portion and a high chromium cast iron portion; and (4) carrying out a heat treatment process on the molded spiral auger after cooling and molding. According to the characteristics of the spiral auger, the spiral auger is divided into a propelling section 2 and a compression section 3, the propelling section 2 has small material extrusion force and slow abrasion, and carbon steel or low alloy steel is adopted; the compression section 3 has large material extrusion force, and the abrasion block is formed by composite casting of high-chromium cast iron and carbon steel or low-alloy steel; the mounting part 1 is arranged on the propelling section 2, and the part is easy to process, safe and firm to mount and difficult to loosen, crack and the like due to the adoption of carbon steel or low alloy steel; and the invention ensures that the 1-position of the spiral auger mounting part is safe and firm and the 3 parts of the compression section are durable in wear resistance by the advantages of drawing carbon steel and high-chromium cast iron through the bimetal liquid-liquid compounding.
Next, a bimetal liquid composite casting auger and a method for manufacturing the same according to the present exemplary embodiment will be further described.
In an embodiment of the present invention, the following description may be combined to further explain step S110 "to manufacture the lost foam model of the spiral auger according to the size requirement and the shape requirement of the spiral auger, and to place the lost foam model in a sand box for vacuum pumping and shaping; the lost foam model comprises a concrete process of a propulsion section model and a compression section model.
Manufacturing a lost foam model of the spiral auger according to the size requirement and the shape requirement of the spiral auger, wherein the lost foam model is a polystyrene foam model, coating a layer of refractory material layer outside the lost foam model, drying, placing the lost foam model in a sand box for vibration molding, and vacuumizing for shaping. The lost foam casting is a new process with near allowance-free and accurate molding, and the process does not need to take a mold, a parting surface or a sand core, so that the casting does not have flash, burrs or draft inclination, and the size error caused by the combination of the core is reduced.
It should be noted that the lost foam model includes a propulsion section model and a compression section model; in the embodiment of the application, casting is carried out in two ways;
as an example, the propulsion section model and the compression section model are an integral model, and are integrally cast.
As an example, the propulsion section model and the compression section model are two independent models, and the two independent models are respectively and independently cast. By adopting the independent casting method, the length of the casting can be reduced, the processing is convenient, the bending deformation of the spiral auger in the length direction caused by heat treatment is reduced, and the product quality of the spiral auger is improved.
In an embodiment of the present invention, as shown in step S120, "the weights of the molten steel in the propulsion section 2 and the molten steel in the compression section 3 are calculated according to the size requirement and the shape requirement of the spiral auger; wherein the molten steel of the propulsion section 2 adopts carbon steel molten steel or low alloy steel molten steel, and the molten steel of the compression section 3 adopts high-chromium cast iron molten steel; comprises two molten steel of carbon steel or low alloy steel and high chromium cast iron.
It should be noted that, according to the characteristics of the spiral auger, the spiral auger is divided into a propulsion section 2 and a compression section 3, the extrusion force of the material in the propulsion section 2 is small, and the abrasion is slow, so that carbon steel or low alloy steel is adopted; the compression section 3 has large material extrusion force and abrasion blocks, so high-chromium cast iron is adopted; the installation part 1 is arranged on the propulsion section 2, the installation part is easy to process due to the adoption of carbon steel or low alloy steel, the installation is safe and firm, the problems of looseness, cracking and the like are not easy to occur, and the compression section 3 is made of high-chromium cast iron, high in hardness, good in wear resistance and durable.
In an embodiment of the present invention, step S130 ″ of pouring molten carbon steel or molten low alloy steel from the casting head 4 into the propulsion section model through the step runner to obtain the propulsion section 2 may be further described with reference to the following description; two kinds of molten steel, namely carbon steel molten steel or low alloy steel molten steel and high-chromium cast iron molten steel, are sequentially poured into the compression section model through a step pouring gate from a casting head 4 to obtain a compression section 3; wherein the compression section 3 comprises a specific process of a carbon steel or low alloy steel part and a high chromium cast iron part ".
When the propulsion section model and the compression section model are integrated models, the propulsion section model is positioned at the lower part of the compression section model, carbon steel or low alloy steel is cast firstly, molten carbon steel or low alloy steel is poured into the propulsion section model from a casting head 4 through a carbon steel pouring gate 5, and molten carbon steel or low alloy steel is poured into a carbon steel or low alloy steel part of the compression section model from the casting head 4 through the carbon steel pouring gate 5, so that a propulsion section 2 and a carbon steel or low alloy steel part of a compression section 3 are obtained; and then casting high-chromium cast iron, and pouring high-chromium cast iron molten steel into the compression section model from a casting head 4 through a high-chromium pouring gate 6 in sequence to obtain a high-chromium cast iron compression section 3 and finally obtain the whole section of spiral auger. The two metals are combined in a liquid-liquid state, and carbon steel and high-chromium cast iron are drawn.
When the model of the propulsion section and the model of the compression section are two independent models, the model of the propulsion section is cast independently, and carbon steel liquid or low alloy steel liquid is poured into the model of the propulsion section from a casting head 4 through a carbon steel pouring gate 5 to obtain a propulsion section 2; and (3) cutting a part of the compression section 3 for bimetal liquid-liquid compounding, wherein a carbon steel or low alloy steel part is positioned at the lower part of the high-chromium cast iron part, casting carbon steel liquid steel or low alloy steel liquid steel into the bottom in the compression section model from a casting head 4 through a carbon steel pouring gate 5 to obtain the carbon steel or low alloy steel part compression section 3, and casting high-chromium cast iron liquid steel into the upper part in the compression section model from the casting head 4 through a high-chromium pouring gate 6 to obtain the high-chromium cast iron part compression section 3.
In an embodiment of the present invention, the specific process of step S140 "performing heat treatment process on the formed spiral auger after cooling and forming" can be further described with reference to the following description.
When the propulsion section model and the compression section model are an integral model, the formed spiral auger is sequentially subjected to annealing, quenching and tempering;
in a specific implementation, firstly, the formed spiral auger is cleaned and polished to remove burrs, so that subsequent heat treatment is facilitated; then annealing the formed spiral auger in sequence, wherein the annealing process comprises the following steps: heating to 880 ℃ at the temperature of 110 ℃/h, preserving heat for 4h at 880 ℃, and cooling to room temperature along with the furnace; the annealed spiral auger is placed on a machine tool to be subjected to coaxiality correction and straightening, the corrected spiral auger is sequentially subjected to quenching and tempering, and the quenching process comprises the following steps: raising the temperature to 650 ℃ at a rate of 80 ℃/h, preserving the heat at 650 ℃ for 3h, raising the temperature to 980 ℃ at a rate of 120 ℃/h, preserving the heat at 980 ℃ for 3h, and finally air-cooling to room temperature; the tempering treatment process comprises the following steps: heating to 400 ℃ at a temperature of 80 ℃/h, preserving heat for 4h at 400 ℃, and finally air-cooling to room temperature to obtain the complete bimetal composite spiral auger.
When the propulsion section model and the compression section model are two independent models, respectively annealing the formed propulsion section 2 and the compression section 3; sequentially quenching and tempering the high-chromium cast iron part of the compression section 3; and fixedly connecting the propulsion section 2 and the compression section 3 after heat treatment to form the whole section of the spiral auger.
In a specific implementation, annealing treatment is carried out on the formed propulsion section 2, cleaning and polishing are carried out after annealing treatment, and the polished propulsion section 2 is placed on a machine tool to be processed into a connecting hole; annealing the formed compression section 3, cleaning and polishing after annealing, and placing the polished compression section 3 on a machine tool to process a connecting pin which is matched with the connecting hole; wherein the connecting pin is located in the carbon steel or low alloy steel portion of the compression section 3; sequentially quenching and tempering the high-chromium cast iron part of the compression section 3; and butt-jointing the compression section 3 after quenching and tempering with the processed carbon steel part of the propulsion section 2, inserting pins of the compression section 3 into connecting holes of the propulsion section 2, then driving the pins in the radius direction of the main shaft for reinforcing, welding two butt joint parts, and then correcting and straightening the coaxiality on a machine tool to finally obtain the complete spiral auger.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a bimetal liquid composite casting spiral auger which characterized in that, includes spiral auger body, spiral auger body includes the installation department, impels section and compression section, the installation department is located impel the tip of section, impel the section with compression section fixed connection.
2. The spiral auger compositely cast with bimetal liquid according to claim 1, wherein the propulsion section is cast by carbon steel or low alloy steel, and the compression section is cast by combining high chromium cast iron and carbon steel or low alloy steel.
3. The manufacturing method of the spiral auger compositely cast by the bimetal liquid according to claim 2, is characterized by comprising the following steps:
manufacturing a lost foam model of the spiral auger according to the size requirement and the shape requirement of the spiral auger, and placing the lost foam model in a sand box for vacuum pumping and shaping; wherein the lost foam model comprises a propulsion section model and a compression section model;
respectively calculating the weight of molten steel in a propulsion section and the weight of molten steel in a compression section according to the size requirement and the shape requirement of the spiral auger; the molten steel of the propulsion section adopts carbon steel liquid or low alloy steel liquid, and the molten steel of the compression section adopts high-chromium cast iron liquid; comprises two molten steel of carbon steel or low alloy steel and high chromium cast iron;
pouring the molten carbon steel or the molten low alloy steel into a propulsion section model from a casting head through a stepped pouring gate to obtain a propulsion section; the carbon steel liquid or the low alloy steel liquid and the high chromium cast iron liquid are sequentially poured into a compression section model through a step pouring gate from a casting head to obtain a compression section; wherein the compression section comprises a carbon steel or low alloy steel portion and a high chromium cast iron portion;
and (4) carrying out a heat treatment process on the molded spiral auger after cooling and molding.
4. The method for manufacturing the spiral auger by bimetal liquid composite casting according to claim 3,
the propulsion section model and the compression section model are an integral model;
or the propulsion section model and the compression section model are two independent models.
5. The method for manufacturing the spiral auger through the composite casting of the bimetal liquid according to claim 4, wherein the step of performing the heat treatment process on the formed spiral auger after the cooling and forming comprises the following steps:
when the propulsion section model and the compression section model are integrated models, the formed spiral auger is subjected to annealing, quenching and tempering in sequence;
when the propulsion section model and the compression section model are two independent models, respectively carrying out annealing treatment on the formed propulsion section and the compression section;
sequentially quenching and tempering the high-chromium cast iron part of the compression section;
and fixedly connecting the propulsion section and the compression section after heat treatment to form the whole section of the spiral auger.
6. The method for manufacturing the spiral auger by the composite casting of the bimetal liquid according to claim 5, wherein when the propulsion section model and the compression section model are integral models, the steps of annealing, quenching and tempering the formed spiral auger are sequentially carried out, and the method comprises the following steps:
and annealing the formed spiral auger in sequence, aligning the annealed spiral auger on a machine tool for coaxiality correction, and quenching and tempering the aligned spiral auger in sequence.
7. The method for manufacturing the spiral auger by double metal liquid composite casting according to claim 5, wherein the step of fixedly connecting the propulsion section and the compression section after the heat treatment to form the whole section of the spiral auger comprises the following steps:
placing the propulsion section after heat treatment on a machine tool to process a connecting hole;
placing the compression section after heat treatment on a machine tool to machine a connecting pin, wherein the connecting pin is matched with the connecting hole; wherein the connecting pin is located in the carbon steel or low alloy steel portion of the compression section;
and butting the propulsion section with the compression section, and fixing by welding to form the whole section of the spiral auger.
8. The manufacturing method of the spiral auger compositely cast by the bimetal liquid according to claim 5, wherein the annealing treatment process comprises the following steps: heating to 880 ℃ at the temperature of 110 ℃/h, preserving heat for 4h at 880 ℃, and cooling to room temperature along with the furnace.
9. The manufacturing method of the bimetal liquid composite casting spiral auger according to claim 5, wherein the quenching treatment process comprises the following steps: raising the temperature to 650 ℃ at a speed of 80 ℃/h, preserving heat for 3h at 650 ℃, raising the temperature to 980 ℃ at a speed of 120 ℃/h, preserving heat for 3h at 980 ℃, and finally air-cooling to room temperature.
10. The manufacturing method of the bimetal liquid composite casting spiral auger according to claim 5, wherein the tempering process comprises the following steps: heating to 400 ℃ at the temperature of 80 ℃/h, preserving the heat for 4h at the temperature of 400 ℃, and finally cooling to room temperature in air.
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