High-efficiency quenching device for large-diameter rollers

Abstract

The invention discloses a high-efficiency quenching device for large-diameter rollers, which is characterized in that it includes a ground-rail type gantry frame, a laser head (9), and a cooling water pool (10). The ground-rail type gantry frame includes a beam (3), two Parallel Y-axis guide rails (1), and movable uprights (4) on the two parallel Y-axis guide rails (1), the crossbeam can be erected on the two movable uprights (4) , the laser head (9) is movably installed on the X-axis guide rail (2), the two ends of the beam (3) are equipped with rotatable and axially movable support rods (8), the cooling water pool (10) Place it in the frame formed by the X-axis guide rail (2) and two Y-axis guide rails (1). The quenching device with this structure can conveniently quench large-diameter rollers, has a simple structure and is convenient to use, and can be widely used in quenching rollers with larger diameters.

Description

technical field [0001] The invention relates to a quenching device, in particular to a high-efficiency quenching device for large-diameter rollers. Background technique [0002] Large diameter rollers are commonly used on road rollers. Such large-diameter rollers are generally made of low-carbon steel in order to meet their mechanical and welding properties. Low-carbon steel itself has poor wear resistance, and the road surface conditions are complex during road roller construction, and the wheels are required to have strong wear resistance. Traditionally, the quenching process is used to improve the hardness and wear resistance of the material. The wheel body of the large-diameter roller is too large, and there is no suitable heat treatment furnace. Therefore, someone invented a hardening process for the surface of low-carbon steel to effectively solve the problem of low-carbon steel. The problem that the quenching hardness is not high enough. Check the Chinese patent dat...

AI Technical Summary

Problems solved by technology

For the power in motion, it can be achieved by reducing the laser scanning speed or widening the width of the laser spot in the direction of parallel movement, but reducing the laser scanning speed will reduce the overall quenching efficiency, while the width of the laser spot in the direction of parallel movement increases, the laser The area of ​​the spot becomes larger. When the required quenching power density is constant, it is necessary to use a higher power laser. For such a roller with a large diameter, multiple parallel lasers can be used for quenching at the same time to improve the quenching efficiency. efficiency

The second is the rapid cooling process. Due to the low carbon content of low-carbon steel, the C curve is seriously shifted to the left. After the material leaves the laser irradiation area, there must be a fast enough cooling rate to make the material within the depth of the layer better. Quenching hardness. In the previous step, in order to improve the efficiency and ensure the depth of the layer, multiple high-power lasers were used. The overall heat input is very large. In the case of constant heat capacity of the material, it can be cooled by air cooling, thermal radiation air cooling or even simple water cooling. Neither can conduct a large amount of excess heat away, resulting in higher and higher temperature of the substrate, unable to achieve rapid cooling, and also fail to achieve the purpose of quenching

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