Method for solving gas choking of coupler knuckle

Abstract

The invention discloses a method for solving gas choking of a coupler knuckle. The method for solving the gas choking of the coupler knuckle is characterized by comprising the steps that a production process is prepared, and production is prepared, specifically, a melting material, a modeling and core-making material and process equipment such as a pattern, a core box, a sand box and the like are prepared; modeling and core-making are carried out, specifically, 650 resin is selected as a core material, the adding amount of the raw material resin is controlled to be about the lower limit of the process, a core cannot exceed the middle limit of the process at most, the core cannot be used when being manufactured, the manufactured core must be placed in a ventilated and dry place for a period of time, the core needs to be placed for 24 or more hours after being manufactured and before being used; melting and pouring are carried out, specifically, the core must be baked during mold closing and is baked for not less than 10 minutes during the mold closing, the pouring speed cannot be too high, and ignition, shakeout cleaning and casting inspection are carried out in time during pouring. The method for solving the gas choking of the coupler knuckle has the advantages that an air choking phenomenon is avoided, the rejection rate of products is greatly reduced, serious economic losses caused to manufacturers due to the high rejection rate are avoided, and serious threats to running safety of railway vehicles are eliminated.

Description

technical field [0001] The invention relates to the field of manufacture of rail vehicles, in particular to a method for solving air choking on a knuckle. Background technique [0002] The knuckle is a key component used to realize the connection between the locomotive and the vehicle or between the vehicle and the transmission of traction and impact force. In addition to the random and alternating traction force, compression force and impact force, the coupler tongue must bear random and alternating forces, etc. In addition to the action force, it also needs to bear the action of bending moment, especially in the shunting operation, the knuckle is often subjected to a large impact force, so its service conditions are very harsh, resulting in cracks, deformation, and wear of various parts. And faults such as poor three-state action, the currently widely used manufacturing method is casting. In the casting process, a core is usually used. The core is a sand core, also called ...

AI Technical Summary

Problems solved by technology

[0003] The 16H knuckle is one of the commonly used knuckles. It was discovered during the casting process. After analyzing, researching and comparing the raw materials used, it was found that the 650 resin used in the core, coupled with the short storage time and baking during use, caused moisture increase, the amount of gas generated increases, it is easy to cause choking, and the phenomenon of choking leads to serious pore defects. Under the action of alternating stress, such defects form cracks and cause direct fracture. The above phenomena often occur during use, making a large number of Products are scrapped, and the waste products are increasing year by year, causing serious economic losses to manufacturers and posing a serious threat to the operation safety of railway vehicles. Therefore, a method to solve the problem of choking on the hook and tongue is proposed to solve the above problems

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