Heating and heat preservation device after welding of hollow shaft

Abstract

The invention relates to a heating and heat preservation device after welding of a hollow shaft. The heating and heat preservation device comprises a furnace body, a temperature control cabinet and a connecting cable, and is characterized in that the furnace body is of a horizontal structure and comprises an upper semi-cylindrical inner cavity furnace wall, a lower semi-cylindrical inner cavity furnace wall and two end walls, which are uniformly distributed with heating resistance wires and temperature sensors, the heating and heat preservation device is provided with a cylindrical support matched with an inner hole of the hollow shaft, and the heating resistance wires and the temperature sensors are uniformly distributed on the cylindrical support. The heating and heat preservation device can well meet the technological requirements of heating and heat preservation after welding of the hollow shaft, ensure the welding quality of the hollow shaft, greatly save working place and reduce energy waste.

Description

technical field [0001] The invention belongs to the technical field of metal heat treatment, in particular to a hollow shaft post-welding heating and heat preservation device. Background technique [0002] The hollow shaft is an important part of the railway locomotive. It plays the role of carrying the weight of the traction motor and transmitting the traction force of the locomotive. It is subjected to high shear stress and fatigue stress, so it must have high strength and toughness. To meet the needs of traction locomotives. At the same time, the connection weld between the hollow shaft claw plate and the cylinder body should also have the same strength and toughness as the hollow shaft. Since the hollow shaft claw plate and the cylinder are both medium-carbon quenched and tempered steel (30CrMo) with a high carbon equivalent value and strong hardenability, welding defects such as cracks are prone to occur during welding, and strict welding measures must be taken to comp...

AI Technical Summary

Problems solved by technology

This process measure is generally completed by using a conventional electric annealing furnace, but there are the following problems: 1. The volume of the electric annealing furnace is large, 2. The hollow shaft welding site is small, 3. The number of hollow shafts is large, and it needs Immediate heating and heat preservation, frequent opening and closing of the annealing furnace door, cannot meet the process requirements

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