Casting process of a truck sideframe, casting model, railway car truck sideframe, railway car truck and railway car

Abstract

The present invention refers to a casting process for a railway truck sideframe comprising the stages of: (i) manufacture of the model; (ii) manufacture of the mold; (iii) manufacture of the cores; (iv) placement of the cores into the mold; (v) pouring of the casting material; and (vii) finishing. The cores of the bases and the central section of the truck sideframe are eliminated in this process. The present invention also refers to a casting model (1 ), comprising a first sideframe section (10) connected by a central section (11 ) to a second sideframe section (12). The sideframe sections (10 and 12) have a base (30), with their respective space (18) in their free extremities, and a central section (11) has a central space (21). The cavity formation elements positioned in the base (18) and central (21 ) spaces are eliminated in the casting model of the present invention (1 ), so that the central and base cores are not required in the casting process. The housing (23) avoids the placement of the core of the brake guide (9) in the mold. Finally, the present invention describes a railway car truck sideframe whose principal characteristic is the fact that it is produced in accordance with the casting process of the present invention.

Description

technical field [0001] The present invention relates to a casting method for a railway truck sideframe and a casting pattern for the aforementioned casting method. Benefits arise by eliminating the cores of the central part and base, as well as the cavity forming elements designed to position them in the mold, compared to existing methods. Background technique [0002] Railcar trucks are designed to support the axles, wheels and suspension system of the car, absorbing shocks caused by the forces that occur during its movement along the track. A typical truck has an area of ​​direct contact with the lower outer surface of the car through a center bolster with each end of the center bolster resting on a spring assembly. These spring assemblies are located in a part of the truck called a sideframe. This is one of the most important structural parts, as it houses not only the spring assembly or other elastic element, but also the end of the wheel axle of the carriage. [0003...

AI Technical Summary

Problems solved by technology

[0023] This document connects several cores together to form a core block, so for this solution to be adopted, it is again necessary to carry out expensive changes in the production phase of the cores, which increases the cost of the method

[0024] Therefore, it can be seen that a casting method, and / or even a casting pattern, which effectively reduces the number of cores without greatly changing the method or the structure of the stages involved and without requiring very large Overhaul to change standards for casting methods used for railway bogie sideframes

Additionally, there is no casting method and / or casting pattern that offers not only simplicity, but considerable improvement in the finishing of truck sideframes, eliminating much of the work used at this stage

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