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US 11,925,966 B2Granted
Forging press for hot forging of asymmetric to symmetric rail and process of forging thereof
OwnerSavita Newar, Shyam Newarinventors
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Abstract
A forge and method of forging is provided. The forge converts an asymmetric railroad rail to a symmetric railroad rail through a combination of vertical and horizontal forging operations. The rail is linearly translated to heating and forging stations on a roller table. The asymmetric to symmetric conversion can be completed without the need for reorienting the rail except along a single translational axis.
Claims14
An asymmetric to symmetric rail forging press, comprising:
- a roller table (209) having one translational axis, the roller table being adapted to receive a railroad rail (210) and translate a railroad rail fore and aft along the one translational axis;
- an induction heater (208) adapted to receive an end portion of a railroad rail, the induction heater being laterally movable between a working position in line with a railroad rail, and a home position not in line with the railroad rail;
- a first forging station in line with the roller table (209) and adapted to receive a railroad rail therefrom, the first forging station comprising a first pair of opposing horizontal hydraulic cylinders (206a, 206b) having horizontal strokes and driving a first set of horizontal forging dies (219), and a first top hydraulic cylinder (211) having a vertical stroke, the first top hydraulic cylinder being aligned to vertically impinge on the first set of horizontal forging dies during a horizontal forging operation, and the first forging station further including two clamps spaced apart along the length of a railroad rail and adapted to fix the position of a railroad rail during a forging operation;
- a second forging station in line with the roller table (209) and adapted to receive a railroad rail from the first forging station, the second forging station comprising, a second pair of opposing horizontal hydraulic cylinders (207a, 207b) having horizontal strokes and driving a second set of horizontal forging dies (218), and a second top hydraulic cylinder (201) having a vertical stroke and driving a top die (323), and the second forging station further including a clamp adapted to receive an end of a railroad rail and fix the position of a railroad rail during a forging operation;
- and
- the top die (323) being linearly translatable between two working positions corresponding to a first portion (323a) of the top die and a second portion (323b) of the top die, wherein the first portion (323a) of the top die includes a lateral step (423) running the length of the first portion (323a), and wherein the second portion (323b) of the top die is flat, omitting the lateral step (423).
3 more elements
A process for asymmetric to symmetric rail forging comprising the steps of:
- mounting a rail to a roller table in line with a first forging station, the roller table being adapted to drive the rail along one translational axis;
- positioning an induction heater between the roller table and the first forging station;
- driving the rail into inductive communication with the induction heater;
- inductively heating the rail to a predetermined forging temperature;
- driving the rail to a first forging station;
- clamping the rail at ends of a working section of the rail;
- pressing a first set of horizontal forging dies into a head portion of the rail and into a first section of the web portion of the rail;
- translationally driving a set of add-on dies to a position stacked vertically on the first set of horizontal dies;
- pressing the first set of horizontal forging dies and the add-on dies into the head portion of the rail, the first section of the web portion of the rail, and a second section of the web portion of the rail;
- driving the rail to a second forging station;
- clamping the rail at three points including an end of the rail, a middle portion of the rail and an unworked portion of the rail;
- pressing a second set of horizontal forging dies into the head portion and the web portion;
- pressing a first portion of a top die, from a first position, into a foot of the rail;
- translationally driving the top die from the first position to a second position;
- and
- pressing a second portion of the top die into the foot of the rail.
13 more elements
Dependencies are inferred from the claim text.