Rail transit derailment valve casting process

Abstract

The invention relates to the technical field of rail transit, and discloses a rail transit derailment valve casting process. The casting process comprises the following steps that raw materials are prepared, specifically, the raw materials conforming to national standards are purchased, impurity removing treatment is carried out on the purchased raw materials, impurities are removed, the raw materials are added into a melting device for melting treatment to form liquid metal, wherein the melting temperature is between 150 DEG C and 250 DEG C; and forging forming is conducted, specifically, theliquid metal is poured into corresponding forging dies, after the liquid metal is solidified and formed, preliminary parts in certain shapes are obtained, then the preliminary parts are punched and formed under a punching machine, special punching dies are adopted during punching, and after punching is completed, part blanks of all the parts of a derailment valve are obtained. According to the rail transit derailment valve casting process, casting stress can be effectively eliminated, the mechanical performance is improved, the cutting machinability is improved, the material performance can be effectively improved, and the quality of the parts is guaranteed.

Description

technical field

[0001] The invention relates to the technical field of rail transit, in particular to a casting process for rail transit derailment valves. Background technique

[0002] Rail transit refers to a type of vehicle or transportation system that operating vehicles need to run on a specific track. The most typical rail transit is a railway system composed of traditional trains and standard railways. With the diversified development of trains and railway technologies, There are more and more types of rail transportation, not only in long-distance land transportation, but also in short- and medium-distance urban public transportation. Common rail transportation includes traditional railways, subways, light rails and trams, and new Rail transit includes maglev rail system, monorail system and automatic passenger rapid transit system, etc., and the most important thing in rail transit is safety, so a set of derailment automatic braking device will be installed at each ...

Examples

Embodiment 1

[0020] Embodiment 1: a rail transit derailment valve casting process, comprising the following steps:

[0021] 1) Raw material preparation: purchase raw materials that meet the national standards, remove impurities from the purchased raw materials, and then put them into the melting device for melting treatment to form liquid metal. The melting temperature is 200 degrees Celsius;

[0022] 2) Forging molding: pour the liquid metal into the corresponding forging mold, wait until the liquid metal is solidified and formed, and get a preliminary part with a certain shape, and then stamp the preliminary part under the punching machine, and use a special stamping die for stamping , after the stamping is completed, the parts blanks of each part of the derailment valve are obtained;

[0023] 3) Heat treatment: heat the part blank to an appropriate temperature above the critical point AC3, and then cool it in the air after keeping it for an hour and a half. When the cooling is completed...

Embodiment 2

[0028] Embodiment 2: A rail transit derailment valve casting process, comprising the following steps:

[0029] 1) Raw material preparation: purchase raw materials that meet the national standards, remove impurities from the purchased raw materials, and then put them into the melting device for melting treatment to form liquid metal. The melting temperature is 230 degrees Celsius;

[0030] 2) Forging molding: pour the liquid metal into the corresponding forging mold, wait until the liquid metal is solidified and formed, and get a preliminary part with a certain shape, and then stamp the preliminary part under the punching machine, and use a special stamping die for stamping , after the stamping is completed, the parts blanks of each part of the derailment valve are obtained;

[0031] 3) Heat treatment: heat the part blank to an appropriate temperature above the critical point ACM, and then cool it in the air after keeping it for 70 minutes. When the cooling is completed, heat t...

Embodiment 3

[0036] Embodiment three: a rail transit derailment valve casting process, comprising the following steps:

[0037]1) Raw material preparation: Purchase raw materials that meet the national standards, remove impurities from the purchased raw materials, and then put them into the melting device for melting treatment to form liquid metal. The melting temperature is 180 degrees Celsius;

[0038] 2) Forging molding: pour the liquid metal into the corresponding forging mold, wait until the liquid metal is solidified and formed, and get a preliminary part with a certain shape, and then stamp the preliminary part under the punching machine, and use a special stamping die for stamping , after the stamping is completed, the parts blanks of each part of the derailment valve are obtained;

[0039] 3) Heat treatment: heat the part blank to an appropriate temperature above the critical point ACM, and then cool it in the air after keeping it for one hour. When the cooling is completed, heat ...

technical field

[0001] The invention relates to the technical field of rail transit, in particular to a casting process for rail transit derailment valves. Background technique

[0002] Rail transit refers to a type of vehicle or transportation system that operating vehicles need to run on a specific track. The most typical rail transit is a railway system composed of traditional trains and standard railways. With the diversified development of trains and railway technologies, There are more and more types of rail transportation, not only in long-distance land transportation, but also in short- and medium-distance urban public transportation. Common rail transportation includes traditional railways, subways, light rails and trams, and new Rail transit includes maglev rail system, monorail system and automatic passenger rapid transit system, etc., and the most important thing in rail transit is safety, so a set of derailment automatic braking device will be installed at each ...

Examples

Embodiment 1

[0020] Embodiment 1: a rail transit derailment valve casting process, comprising the following steps:

[0021] 1) Raw material preparation: purchase raw materials that meet the national standards, remove impurities from the purchased raw materials, and then put them into the melting device for melting treatment to form liquid metal. The melting temperature is 200 degrees Celsius;

[0022] 2) Forging molding: pour the liquid metal into the corresponding forging mold, wait until the liquid metal is solidified and formed, and get a preliminary part with a certain shape, and then stamp the preliminary part under the punching machine, and use a special stamping die for stamping , after the stamping is completed, the parts blanks of each part of the derailment valve are obtained;

[0023] 3) Heat treatment: heat the part blank to an appropriate temperature above the critical point AC3, and then cool it in the air after keeping it for an hour and a half. When the cooling is completed...

Embodiment 2

[0028] Embodiment 2: A rail transit derailment valve casting process, comprising the following steps:

[0029] 1) Raw material preparation: purchase raw materials that meet the national standards, remove impurities from the purchased raw materials, and then put them into the melting device for melting treatment to form liquid metal. The melting temperature is 230 degrees Celsius;

[0030] 2) Forging molding: pour the liquid metal into the corresponding forging mold, wait until the liquid metal is solidified and formed, and get a preliminary part with a certain shape, and then stamp the preliminary part under the punching machine, and use a special stamping die for stamping , after the stamping is completed, the parts blanks of each part of the derailment valve are obtained;

[0031] 3) Heat treatment: heat the part blank to an appropriate temperature above the critical point ACM, and then cool it in the air after keeping it for 70 minutes. When the cooling is completed, heat t...

Embodiment 3

[0036] Embodiment three: a rail transit derailment valve casting process, comprising the following steps:

[0037]1) Raw material preparation: Purchase raw materials that meet the national standards, remove impurities from the purchased raw materials, and then put them into the melting device for melting treatment to form liquid metal. The melting temperature is 180 degrees Celsius;

[0038] 2) Forging molding: pour the liquid metal into the corresponding forging mold, wait until the liquid metal is solidified and formed, and get a preliminary part with a certain shape, and then stamp the preliminary part under the punching machine, and use a special stamping die for stamping , after the stamping is completed, the parts blanks of each part of the derailment valve are obtained;

[0039] 3) Heat treatment: heat the part blank to an appropriate temperature above the critical point ACM, and then cool it in the air after keeping it for one hour. When the cooling is completed, heat ...