CN111230070A - Casting process of rail transit derailing valve - Google Patents
Casting process of rail transit derailing valve Download PDFInfo
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- CN111230070A CN111230070A CN202010059170.2A CN202010059170A CN111230070A CN 111230070 A CN111230070 A CN 111230070A CN 202010059170 A CN202010059170 A CN 202010059170A CN 111230070 A CN111230070 A CN 111230070A
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention relates to the technical field of rail transit, and discloses a rail transit derailing valve casting process which comprises the following steps of preparing raw materials, purchasing raw materials meeting national standards, removing impurities from the purchased raw materials, adding the raw materials into a melting device for melting treatment to form liquid metal, wherein the melting temperature is between one hundred fifty ℃ and two hundred fifty ℃; forging forming, pouring liquid metal into a corresponding forging die, obtaining a preliminary part with a certain shape after the liquid metal is solidified and formed, then carrying out punch forming on the preliminary part under a punch press, adopting a special stamping die during stamping, and obtaining a part blank of each part of the derailing valve after the stamping is finished. The casting process of the rail transit derailing valve can effectively eliminate casting stress, improve mechanical property and machinability, effectively improve material property and ensure the quality of parts.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a casting process of a rail transit derailing valve.
Background
The rail transit is a kind of transportation means or transportation system that an operating vehicle needs to run on a specific rail, the most typical rail transit is a railway system composed of a traditional train and a standard railway, with the diversified development of the train and the railway technology, the rail transit is more and more types, not only is distributed over long-distance land transportation, but also is widely applied to middle and short-distance urban public transportation, common rail transit includes traditional railways, subways, light rails and tramcars, novel rail transit includes a magnetic suspension rail system, a single rail system, a passenger automatic rapid transit system and the like, and the most important rail transit is safety, so that a set of derailment automatic braking device is installed at each axle, and the derailment valve is a core component of the derailment automatic braking device.
The existing derail valve is easy to cast by materials and inconvenient for users in the process of casting, and the quality problem is easy to occur after the casting is finished, so that the casting process of the derail valve for rail transit is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a casting process of a rail transit derailing valve, which has the advantages of convenience in casting and the like, and solves the problems that the conventional derailing valve is inconvenient to cast materials in the casting process, inconvenience is brought to a user, and quality problems are easy to occur after casting is finished.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a rail transit derailment valve casting process comprises the following steps:
1) preparing raw materials: purchasing raw materials meeting the national standard, removing impurities from the purchased raw materials, adding the raw materials into a melting device for melting treatment to form liquid metal, wherein the melting temperature is between one hundred and fifty ℃ and two hundred and fifty ℃;
2) forging and forming: pouring liquid metal into a corresponding forging die, obtaining a primary part with a certain shape after the liquid metal is solidified and formed, then carrying out punch forming on the primary part under a punch press, wherein a special punching die is adopted during punching, and obtaining a part blank of each part of the derailing valve after punching is finished;
3) and (3) heat treatment: heating the part blank to a proper temperature above a critical point AC3 or ACM, then cooling in the air after keeping for a certain time, heating the cooled part blank to a proper temperature below the critical point AC1 after cooling, then keeping for a certain time, then cooling in the air, and obtaining the heat-treated part blank after cooling;
4) and (3) processing and forming: respectively turning, milling, grinding and polishing the part blank after heat treatment to obtain a finished part product, detecting the finished part product in a high-precision measuring instrument, ensuring that each size error of the part is controlled within zero-five millimeters, marking a good product on the part meeting the requirement, marking a defective product on the part with the error between zero-five millimeters and zero-one millimeter, and marking a waste product with the error outside zero-one millimeter;
5) obtaining a finished product: respectively assembling the superior parts and the inferior parts to obtain a valve product, scrapping the waste parts, detecting the valve product after the assembly, including the air tightness and the precision of the valve, then spraying paint to mark the qualified valve product, and finally boxing for sale.
Preferably, the raw material can be carbon steel and alloy steel, and the removed impurities comprise dust, plastic paper products, rust possibly existing and the like.
Preferably, in the process of transferring the preliminary part to the punching machine, the preliminary part is clamped by long-handled pliers, and the length of the long-handled pliers is not less than one meter.
(III) advantageous effects
Compared with the prior art, the invention provides a casting process of a rail transit derailing valve, which has the following beneficial effects:
1. the rail transit derailing valve casting process comprises the steps of preparing raw materials, purchasing raw materials meeting national standards, removing impurities from the purchased raw materials, removing impurities, adding the raw materials into a melting device for melting to form liquid metal, wherein the melting temperature is between one hundred fifty ℃ and two hundred fifty ℃, forging and forming, pouring the liquid metal into a corresponding forging die, obtaining a primary part with a certain shape after the liquid metal is solidified and formed, performing punch forming on the primary part under a punch press, adopting a special punching die during punching, obtaining part blanks of various parts of the derailing valve after the punching is finished, performing heat treatment, heating the part blanks to a proper temperature above a critical point AC3 or ACM, cooling in the air after keeping for a certain time, and cooling, the part blank after will cooling heats to the suitable temperature below critical point AC1, then keep the certain time, cool off in the air afterwards, after the cooling is accomplished, obtain the part blank after the heat treatment, thereby after heat treatment, casting stress can be effectively eliminated, and can refine the tissue, improve mechanical properties and improve the machinability, not only effectively increased the performance of material, the processing of the later stage of still being convenient for, more convenient to use person carries out production and processing, raw and other materials can be carbon steel and alloy steel simultaneously, the impurity of getting rid of includes dust, plastic paper article and the rust stain that probably exists etc., only guaranteed the performance of raw and other materials, after getting rid of impurity, make the quality of product better.
2. The rail transit derailing valve casting process comprises the steps of respectively turning, milling, grinding and polishing a part blank after heat treatment through machining and forming to obtain a finished part product, detecting the finished part product in a high-precision measuring instrument to ensure that each size error of the part is controlled within zero-five millimeters, marking a good product on the part meeting the requirement, marking a defective product on the part between zero-five millimeters and zero-one millimeter, marking a waste product outside zero-one millimeter, obtaining a finished product, respectively assembling the good part and the defective part to obtain a valve product, scrapping the waste part, detecting the valve product after the assembly, wherein the valve product comprises the air tightness and the precision of the valve, spraying paint on the qualified valve product, boxing and marking, and finally waiting for sale, and accurately detecting each parameter of each part in the production process, the quality of part has been guaranteed to every part marks respectively, can effectively avoid appearing with the condition that fills in order, through at preliminary part in-process of shifting the punching machine, adopt long-handled pincers to carry out the centre gripping to preliminary part, long-handled pincers's length is not less than a meter, can guarantee user's safety, avoids the user to be scalded.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The first embodiment is as follows: a rail transit derailment valve casting process comprises the following steps:
1) preparing raw materials: purchasing raw materials meeting the national standard, removing impurities from the purchased raw materials, adding the raw materials into a melting device for melting to form liquid metal, wherein the melting temperature is two hundred ℃;
2) forging and forming: pouring liquid metal into a corresponding forging die, obtaining a primary part with a certain shape after the liquid metal is solidified and formed, then carrying out punch forming on the primary part under a punch press, wherein a special punching die is adopted during punching, and obtaining a part blank of each part of the derailing valve after punching is finished;
3) and (3) heat treatment: heating the part blank to a proper temperature above a critical point AC3, then cooling in air after keeping for one and a half hours, heating the cooled part blank to a proper temperature below a critical point AC1 after cooling is completed, then keeping for one hour, then cooling in air, and obtaining a heat-treated part blank after cooling is completed;
4) and (3) processing and forming: respectively turning, milling, grinding and polishing the part blank after heat treatment to obtain a finished part product, detecting the finished part product in a high-precision measuring instrument, ensuring that each size error of the part is controlled within zero-five millimeters, marking a good product on the part meeting the requirement, marking a defective product on the part with the error between zero-five millimeters and zero-one millimeter, and marking a waste product with the error outside zero-one millimeter;
5) obtaining a finished product: respectively assembling the superior parts and the inferior parts to obtain a valve product, scrapping the waste parts, detecting the valve product after the assembly, including the air tightness and the precision of the valve, then spraying paint to mark the qualified valve product, and finally boxing for sale.
The raw material can be carbon steel and alloy steel, and the removed impurities comprise dust, plastic paper products, possible rust and the like.
And in the process of transferring the primary part to the punching machine, clamping the primary part by using long-handle pliers, wherein the length of the long-handle pliers is not less than one meter.
Example two: a rail transit derailment valve casting process comprises the following steps:
1) preparing raw materials: purchasing raw materials meeting the national standard, removing impurities from the purchased raw materials, adding the raw materials into a melting device for melting to form liquid metal, wherein the melting temperature is two hundred and thirty ℃;
2) forging and forming: pouring liquid metal into a corresponding forging die, obtaining a primary part with a certain shape after the liquid metal is solidified and formed, then carrying out punch forming on the primary part under a punch press, wherein a special punching die is adopted during punching, and obtaining a part blank of each part of the derailing valve after punching is finished;
3) and (3) heat treatment: heating the part blank to a suitable temperature above the critical point ACM, then cooling in air after holding for seventy minutes, when cooling is completed, heating the cooled part blank to a suitable temperature below the critical point AC1, then holding for ninety minutes, then cooling in air, and after cooling is completed, obtaining a heat treated part blank;
4) and (3) processing and forming: respectively turning, milling, grinding and polishing the part blank after heat treatment to obtain a finished part product, detecting the finished part product in a high-precision measuring instrument, ensuring that each size error of the part is controlled within zero-five millimeters, marking a good product on the part meeting the requirement, marking a defective product on the part with the error between zero-five millimeters and zero-one millimeter, and marking a waste product with the error outside zero-one millimeter;
5) obtaining a finished product: respectively assembling the superior parts and the inferior parts to obtain a valve product, scrapping the waste parts, detecting the valve product after the assembly, including the air tightness and the precision of the valve, then spraying paint to mark the qualified valve product, and finally boxing for sale.
The raw material can be carbon steel and alloy steel, and the removed impurities comprise dust, plastic paper products, possible rust and the like.
And in the process of transferring the primary part to the punching machine, clamping the primary part by using long-handle pliers, wherein the length of the long-handle pliers is not less than one meter.
Example three: a rail transit derailment valve casting process comprises the following steps:
1) preparing raw materials: purchasing raw materials meeting the national standard, removing impurities from the purchased raw materials, adding the raw materials into a melting device for melting to form liquid metal, wherein the melting temperature is one hundred eighty ℃;
2) forging and forming: pouring liquid metal into a corresponding forging die, obtaining a primary part with a certain shape after the liquid metal is solidified and formed, then carrying out punch forming on the primary part under a punch press, wherein a special punching die is adopted during punching, and obtaining a part blank of each part of the derailing valve after punching is finished;
3) and (3) heat treatment: heating the part blank to a suitable temperature above the critical point ACM, then cooling in air after holding for one hour, when cooling is complete, heating the cooled part blank to a suitable temperature below the critical point AC1, then holding for ninety minutes, then cooling in air, after cooling is complete, obtaining a heat treated part blank;
4) and (3) processing and forming: respectively turning, milling, grinding and polishing the part blank after heat treatment to obtain a finished part product, detecting the finished part product in a high-precision measuring instrument, ensuring that each size error of the part is controlled within zero-five millimeters, marking a good product on the part meeting the requirement, marking a defective product on the part with the error between zero-five millimeters and zero-one millimeter, and marking a waste product with the error outside zero-one millimeter;
5) obtaining a finished product: respectively assembling the superior parts and the inferior parts to obtain a valve product, scrapping the waste parts, detecting the valve product after the assembly, including the air tightness and the precision of the valve, then spraying paint to mark the qualified valve product, and finally boxing for sale.
The raw material can be carbon steel and alloy steel, and the removed impurities comprise dust, plastic paper products, possible rust and the like.
And in the process of transferring the primary part to the punching machine, clamping the primary part by using long-handle pliers, wherein the length of the long-handle pliers is not less than one meter.
The invention has the beneficial effects that: the rail transit derailing valve casting process comprises the steps of preparing raw materials, purchasing raw materials meeting national standards, removing impurities from the purchased raw materials, removing impurities, adding the raw materials into a melting device for melting to form liquid metal, wherein the melting temperature is between one hundred fifty ℃ and two hundred fifty ℃, forging and forming, pouring the liquid metal into a corresponding forging die, obtaining a primary part with a certain shape after the liquid metal is solidified and formed, performing punch forming on the primary part under a punch press, adopting a special punching die during punching, obtaining part blanks of various parts of the derailing valve after the punching is finished, performing heat treatment, heating the part blanks to a proper temperature above a critical point AC3 or ACM, cooling in the air after keeping for a certain time, and cooling, heating the cooled part blank to a proper temperature below a critical point AC1, keeping for a certain time, cooling in the air, and after cooling, obtaining the heat-treated part blank, thereby effectively eliminating casting stress, refining tissue, improving mechanical property and machinability, effectively increasing material property, facilitating later processing, facilitating production and processing for users, simultaneously, the raw materials can be carbon steel and alloy steel, the removed impurities comprise dust, plastic paper products, possible rust stains and the like, only ensuring the performance of the raw materials, and after removing the impurity impurities, leading the product quality to be better, respectively carrying out turning, milling, grinding and polishing treatment on the heat-treated part blank through processing and forming, obtaining a part finished product, and then detecting the part finished product in a high-precision measuring instrument, ensuring that all size errors of parts are controlled within zero-five millimeters, marking good parts according to requirements, marking defective parts between zero-five millimeters and zero-one millimeter, marking waste parts outside zero-one millimeter, obtaining finished products, respectively assembling the good parts and the defective parts to obtain valve products, scrapping the waste parts, detecting the valve products after the assembly is finished, including the air tightness and the precision of the valves, spraying paint and marking the qualified valve products, finally boxing and waiting for sale, accurately detecting all parameters of all the parts in the production process, ensuring the quality of the parts, marking each part respectively, effectively avoiding the situation of being filled again, clamping the primary parts by using long-handle pliers in the process of transferring the primary parts to a punching machine, wherein the length of the long-handle pliers is not less than one meter, can guarantee user's safety, avoid the user to be scalded, solve current derail valve and in casting department process, appear the inconvenient casting of material easily, brought inconvenience for the user to the problem of quality problems appears after the casting is accomplished easily.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The casting process of the rail transit derailment valve is characterized by comprising the following steps of:
1) preparing raw materials: purchasing raw materials meeting the national standard, removing impurities from the purchased raw materials, adding the raw materials into a melting device for melting treatment to form liquid metal, wherein the melting temperature is between one hundred and fifty ℃ and two hundred and fifty ℃;
2) forging and forming: pouring liquid metal into a corresponding forging die, obtaining a primary part with a certain shape after the liquid metal is solidified and formed, then carrying out punch forming on the primary part under a punch press, wherein a special punching die is adopted during punching, and obtaining a part blank of each part of the derailing valve after punching is finished;
3) and (3) heat treatment: heating the part blank to a proper temperature above a critical point AC3 or ACM, then cooling in the air after keeping for a certain time, heating the cooled part blank to a proper temperature below the critical point AC1 after cooling, then keeping for a certain time, then cooling in the air, and obtaining the heat-treated part blank after cooling;
4) and (3) processing and forming: respectively turning, milling, grinding and polishing the part blank after heat treatment to obtain a finished part product, detecting the finished part product in a high-precision measuring instrument, ensuring that each size error of the part is controlled within zero-five millimeters, marking a good product on the part meeting the requirement, marking a defective product on the part with the error between zero-five millimeters and zero-one millimeter, and marking a waste product with the error outside zero-one millimeter;
5) obtaining a finished product: respectively assembling the superior parts and the inferior parts to obtain a valve product, scrapping the waste parts, detecting the valve product after the assembly, including the air tightness and the precision of the valve, then spraying paint to mark the qualified valve product, and finally boxing for sale.
2. The process for casting the rail transit derailment valve according to claim 1, wherein the raw material is carbon steel and alloy steel, and the removed impurities comprise dust, plastic paper, and possible rust.
3. The rail transit derailment valve casting process according to claim 1, wherein the preliminary part is clamped by long-handled pliers during the transfer to the punch, and the length of the long-handled pliers is not less than one meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010059170.2A CN111230070A (en) | 2020-01-18 | 2020-01-18 | Casting process of rail transit derailing valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010059170.2A CN111230070A (en) | 2020-01-18 | 2020-01-18 | Casting process of rail transit derailing valve |
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| CN111230070A true CN111230070A (en) | 2020-06-05 |
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| CN202010059170.2A Pending CN111230070A (en) | 2020-01-18 | 2020-01-18 | Casting process of rail transit derailing valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112238330A (en) * | 2020-09-27 | 2021-01-19 | 祥安消防科技有限公司 | Forming process of fire safety valve |
| CN112264589A (en) * | 2020-09-14 | 2021-01-26 | 襄阳顺特阳光科技有限公司 | Manufacturing and forming method of stainless steel intercooling air inlet pipe |
| CN116373812A (en) * | 2023-05-29 | 2023-07-04 | 四川永森航空材料科技有限公司 | Automatic train derailment braking device and braking method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112264589A (en) * | 2020-09-14 | 2021-01-26 | 襄阳顺特阳光科技有限公司 | Manufacturing and forming method of stainless steel intercooling air inlet pipe |
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Application publication date: 20200605 |