Near-clean forging forming method of coupler knuckle for railway vehicles
A railway vehicle and forging forming technology, which is applied in the direction of metal processing equipment, etc., can solve the problems of complex manufacturing process and difficulty in forging knuckle manufacturing, and achieve the effects of high forming precision, saving machining workload, and compact structure
Active Publication Date: 2019-08-20
JILIN UNIV +1
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Problems solved by technology
[0006] The purpose of the present invention is to solve the difficult problems of forging knuckle manufacturing and complicated manufacturing process, and proposes a method for near-clean forging of railway vehicle coupler knuckles
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[0036] The present invention will be further described below with reference to specific embodiments and accompanying drawings.
[0037] like Figure 1-6 As shown, the near-net forging forming method of the rail vehicle coupler tongue of the present invention comprises the following steps:
[0038] Step (a), material preparation: according to the product model, the round steel of the corresponding specification is cut to a certain length with a band saw;
[0039] Step (b), heating: use 1500KW medium frequency induction heating equipment to heat the blank to 1150°C ± 20°C;
[0040] Step (c), prefabricating blanks: placing the heated blanks on an 800-ton multi-directional forging equipment to carry out multi-forging directions and prefabricating blanks.
[0041] Step (d), blank pre-forging: the prefabricated blank is forged in the pre-forging die on the 2,000-ton multi-directional forging equipment, and pre-forged into a blank of a certain shape and size;
[0042] Step (e), ne...
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The invention discloses a near-net forging forming method of a railway vehicle coupler knuckle. The problems that forging forming of the railway vehicle coupler knuckle is difficult, and the machining and manufacturing process is complex are solved. The near-net forging forming method comprises the steps of material preparation, heating, prefabrication of blanks, preforging, closed die-forging, waste heat quenched-tempered heat treatment, finish machining, flaw detection and the like. A closed die-forging technology is adopted so that near-net forming of the coupler knuckle can be achieved, energy and materials are saved, the outer contour shape and size do not need to be machined, and the utilization ratio of the materials can reach 92% or above. In the whole forming process, workpieces are always in a three-dimensional stress state, and products have a compact structure, high toughness, good fatigue performance and long service life. The defects of air holes, shrinkage porosity, inclusions, cracks and the like in existing casted coupler knuckles are overcome, and the problems of complex process and difficult forming in the existing coupler knuckle forging manufacturing process are solved. The near-net forging forming method is simple in manufacturing process, high in material utilization rate and suitable for mass production and manufacturing of railway vehicle coupler knuckle products of various types.
Description
technical field [0001] The invention belongs to the technical field of plastic forming of complex parts, in particular to a method for near-net forging forming of a coupler tongue of a railway vehicle. Background technique [0002] The coupler of a railway vehicle is a key component connecting the railway locomotive and the vehicle and the vehicle, and the main component of the coupler part is the yoke, so the yoke is the key traction component of the railway vehicle, and its performance is directly related to the running safety of the railway train. reliability. With the continuous development of high-speed and heavy-load railway transportation in my country, the longitudinal impact force of the train increases sharply, the friction and wear of the contact surface of the coupler tongue is serious, and the performance of the coupler tongue has become more and more difficult to meet the requirements of modern railway transportation, which seriously affects the Safety and effi...
Claims
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IPC IPC(8): B21J1/04B21J1/06B21J5/02B23P15/20
Inventor 陈庆敏岳岩何东野
Owner JILIN UNIV