Integral sand core, mould for casting coupler knuckle, producing method and coupler knuckle

Abstract

The invention discloses an integral core and a mold for casting a coupler knuckle and a coupler knuckle casting method. The disclosed integral core for casting the coupler knuckle is provided with an S surface which is the same as a matching surface of the coupler knuckle, and can be placed into a mold cavity of a coupler knuckle casting mold during the casting, the S surface of the integral core is taken as an S surface of the mold cavity of the casting mold, and the S surface of the integral core for casting the coupler knuckle is a whole, has no parting surfaces, and also has no stripping taper, thereby ensuring that the S surface of a coupler knuckle casting piece has no stripping taper and burrs; the disclosed mold for casting the coupler knuckle is matched with the integral core for casting the coupler knuckle and can cast the coupler knuckle casting piece with the S surface without stripping taper; and the disclosed S surface part of the coupler knuckle comprises two joined cylindrical curve surfaces and has no stripping taper, so as to ensure that the matching surface of the coupler knuckle has evener contact and improves the service performance of the coupler knuckle.

Description

technical field [0001] The invention relates to a casting technology, in particular to an integral sand core for knuckle casting, a mold for knuckle casting, a knuckle casting method and a knuckle. Background technique [0002] The railway freight car of the wheel-rail vehicle generally includes a car body, a bogie, a brake device, a coupler buffer device and other parts. Among them, the function of the coupler buffer device is to connect the trains, conduct the traction force of the locomotive to make the vehicle run along the track, and bear various loads such as traction and impact caused by the locomotive, car body, and lines. The coupler buffer device is mainly composed of a buffer, a coupler body, a coupler tail frame, a coupler cluster plate and a coupler tongue. Wherein, adjacent trains are directly connected by the cooperation of two knuckles. [0003] figure 1 It shows a schematic diagram of the mating relationship between knuckle 1 and knuckle 2 of adjacent tra...

AI Technical Summary

Problems solved by technology

like figure 2 As shown, when the knuckle 1 and knuckle 2 are mated, due to the influence of the draft angle, when the two are mated, only a small part of the parting surface is in contact, and the small contact area is likely to cause partial stress on the S surface of the knuckle If it is too large, the S surface of the knuckle will be damaged prematurely, causing pits, accelerating the wear of the contact surface, and even causing cracks

In order to ensure the uniformity of the contact surface between the mating surfaces of the knuckle, at present, the S surface of the knuckle is usually ground to make the S surface relatively smooth; however, it is difficult to ensure the contact of the mating surface of the knuckle after grinding At the same time, since the S surface of the knuckle is a curved surface, it is very difficult to grind and repair, and it also increases the labor intensity and production cycle of the knuckle production

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