A Forging Forming Process of Double-ear Fittings for Electrified Railway Catenary
An electrified railway and forging molding technology, which is applied to railway car body parts, transportation and packaging, vehicle parts, etc., can solve problems such as low yield, insufficient punching of metal bases, cracks, etc.
Active Publication Date: 2016-01-20
RUGAO DASHENG LINE EQUIP
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Problems solved by technology
At present, there are two ways to produce this kind of metal base: one is casting method, which has the disadvantages of loose internal structure, shrinkage cavity, cracks and other defects, the quality cannot meet the requirements, and there are great safety hazards. And scrap more
[0003] The forging method can also be used. Due to the structure of the die, at present, when all enterprises use forging dies to forge the metal base, the tonnage of the friction press required is quite large, and even if a large-tonnage friction press is used for forging, the forged The base of the metal fittings is still prone to insufficient punching, resulting in scrapped products, high energy consumption, low yield, and high manufacturing costs
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[0011] Such as figure 1 From the schematic diagram shown, it can be known that the double-ear fittings forging mold for electrified railway catenary of the present invention mainly includes an upper mold and a lower mold.
[0012] The upper mold mainly includes an upper base 1 and a movable working platform 15. The movable working platform 15 is arranged at the bottom of the upper base 1. The cross section of the movable working platform 15 is T-shaped, and an annular hoop is set on the outer end of the movable working platform 15. A3, the ring hoop A3 is stepped, the ring hoop A3 is fixed with the upper base 1 through the limit ring 2, the limit ring 2 is connected with the upper base 1 through screws, and is opened in the middle of the bottom of the movable working platform 15 There is a pit A5 with a rectangular cross section, and a groove A4 with an isosceles T-shaped cross section is provided at both ends of the pit A5, and the groove A4 communicates with the pit A5.
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The invention relates to a forging and molding process for a double-lug fitting of an electric railway contact net. The process comprises the following steps: driving mandrels to move downwards by using a driving oil cylinder positioned on a lower die, and injecting into the die cavity of the lower die fixed to a working platform; driving the upper die to move downwards to be assembled with the lower die in order to complete molding of a workpiece, wherein the pressure of the upper die is 5,000KN after die assembly; driving the upper die to move upwards to be opened, driving the mandrels to move upwards by using the driving oil cylinder positioned on the lower die, ejecting the workpiece upwards, and taking the workpiece out by working personnel to complete one procedure cycle, wherein the pressure of the driving oil cylinder is 3,000KN. The process has the advantages that one-time forging and molding can be performed by using the die; a hoop is sleeved at the outer ends of a movable working platform and a fixed working platform, thereby preventing deformation of a forged contact net due to opening of the die cavity by a blank during forging and molding; the forged contact net can be ejected out by using two mandrels, and punching can be performed conveniently by exhausting.
Description
technical field [0001] The invention relates to a forging molding process of double-ear fittings for an electrified railway catenary. Background technique [0002] The electrified railway catenary component wrist-arm fitting base is used for the connection of high-speed electrified railway catenary such as the Beijing-Shanghai high-speed railway. It is composed of the base and the symmetrically arranged ears on both sides. At present, there are two ways to produce this kind of metal base: one is casting method, which has the disadvantages of loose internal structure, shrinkage cavity, cracks and other defects, the quality cannot meet the requirements, and there are great safety hazards. And scrap more. [0003] The forging method can also be used. Due to the structure of the die, at present, when all enterprises use forging dies to forge the metal base, the tonnage of the friction press required is quite large, and even if a large-tonnage friction press is used for forging,...
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IPC IPC(8): B21K7/02
Inventor 征大生刘松明
Owner RUGAO DASHENG LINE EQUIP