Roll forging process for solid forging hand brake lever of rail wagon
A technology for integral forging, railway freight cars, used in railway car body parts, vehicle parts, metal processing equipment, etc.
Inactive Publication Date: 2014-11-05
BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH +1
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Problems solved by technology
[0005] The structural characteristics of the forged tie rod determine the complexity of the forging process. Since the length of the forked tie rod is 4850mm, it is an abnormal piece, and the diameter is very thin, so it needs to be more Large roll forging machine equipment, but the roll forging machine is too large, the working performance is not stable, and the design requirements are also high, so the length of the mold produced on the 1500mm roll forging machine is not enough, only segmented roll forging can meet the requirements of this roll forging Complete roll forging on equipment
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[0026] In this example figure 1 It is the front view of the forged tie rod for the railway freight car, and the symbol 11' is the fork part of the forged tie rod used for the railway freight car, which is die forged in the last process after roll forging. it is through image 3 The number 16 of the front-end head is forged by die forging, and the number 2' is the front-end I-shaped part of the fork-shaped tie rod forging, which needs to be formed by roll forging in the first roll forging. The mark 3' is the rod part, which requires four passes of roll forging in the roll forging; the mark 4' is the tail part of the fork-shaped tie rod forging for the railway freight car, which needs to be formed in one roll forging. Do it once. The length of the label L is the installation center distance of the fork rod is 4850mm.
[0027] figure 2 It is a top view of the forged tie rod for the railway freight car. The I-shaped part of the front end is marked 2' in the whole forging. ....
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The invention discloses a roll forging process for a solid forging hand brake lever of a rail wagon and particularly relates to a roll forging process for a fork draw bar forge piece on the rail wagon. The segmented roll forging process of the fork draw bar forge piece is divided into four passes, an I-shaped portion is directly subjected to roll forging forming through a round bar stock in a roll forging mould in the first pass and isn't deformed in roll forging of the other three passes, a middle bar portion is subjected to roll forging of the four passes, a small head portion is subjected to one-pass flattening forming of the fourth pass, and the plane of the I-shaped beam portion and the plane of the small head portion are guaranteed to form an angle of 90 degrees.
Description
technical field [0001] The invention relates to a roll forging process for a fork-shaped tie rod forging on a railway freight car, in particular to a roll forging process for a fork-shaped tie rod forging on a railway freight car, which is applied in the field of forging. Background technique [0002] In recent years, the railway freight industry has actively promoted the speed increase of heavy loads to alleviate the shortage of railway carrying capacity. In terms of railway roads, it is mainly the adaptive transformation of the original roads. In terms of trucks and vehicles, it is mainly to increase the carrying capacity of various components. In this way, many parts that originally used welding parts have far higher carrying capacity and safety under heavy-duty and high-speed conditions. Far from being able to meet the requirements, and therefore switch to forgings, so that the market for railway forgings is getting bigger and more active. [0003] In recent years, the...
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IPC IPC(8): B21K7/14B21J5/00
Inventor 蒋鹏朱涛胡福荣何立文杨守臣陈杰鹏杨勇
Owner BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH