Continuous heat treatment device of wheel hub blank

Abstract

The invention provides a continuous heat treatment device of a wheel hub blank, which comprises a solid solution furnace for solid solution treatment of a wheel hub blank; a quenching pool for cooling the wheel hub blank after solid solution treatment; an aging oven for aging treatment of the wheel hub blank; a hanging rack on which the wheel hub blank is hung by a hook; and a material conveying line for transporting the wheel hub blank to a specified position. The solid solution furnace is communicated with the aging oven through a connecting pipe, and a regulating valve is disposed on the connecting pipe. According to the continuous heat treatment device of a wheel hub blank provided in the invention, the solid solution furnace and the aging oven are disposed side by side, which reduces the land occupation of the continuous heat treatment device, decreases the transport distance of the wheel hub blank between the solid solution furnace and the aging oven, increases the treatment speed of the wheel hub blank, and thus improves the production efficiency of wheel hubs; the wheel hub blank is subjected to heat treatment in a hanging manner, which enables the wheel hub blank to be heated uniformly, improves the heat treatment effect of the wheel hub blank, reduces influence on subsequent machining of the wheel hub blank, and improves the qualified rate of wheel hubs.

Description

technical field [0001] The invention relates to the field of heat treatment, in particular to a continuous heat treatment device for hub blanks. Background technique [0002] At present, the continuous solid solution, quenching and aging heat treatment furnaces dedicated to aluminum alloy wheels are generally controlled at 520-550°C for solid solution furnaces and 140-160°C for aging furnaces due to different heating temperatures. In the technology, the solid solution furnace and the aging furnace are divided into two independent furnace equipment, which leads to large equipment investment, large floor area, and large energy loss. At the bottom of the furnace, the heated hub blanks are placed on the furnace rollers, and the rollers rotate slowly to push the hub blanks forward. In order to make effective use of the space in the furnace and improve the heat treatment speed and efficiency, the hub blanks are usually stacked in a material frame. Solid solution, quenching and ag...

AI Technical Summary

Problems solved by technology

[0002] At present, the continuous solid solution, quenching and aging heat treatment furnaces dedicated to aluminum alloy wheels are generally controlled at 520-550°C for solid solution furnaces and 140-160°C for aging furnaces due to different heating temperatures. In the technology, the solid solution furnace and the aging furnace are divided into two independent furnace equipment, which leads to large equipment investment, large floor area, and large energy loss. At the bottom of the furnace, the heated hub blanks are placed on the furnace rollers, and the rollers rotate slowly to push the hub blanks forward. In order to make effective use of the space in the furnace and improve the heat treatment speed and efficiency, the hub blanks are usually stacked in a material frame. Solid solution, quenching and aging are carried out in units of a whole frame, especially for motorcycle aluminum alloy wheels. Since the center hub of motorcycle wheels is usually wider than the rim, when stacking, it is mainly the center hub that is in contact with the force, and the rim is suspended in the air. The blanks are dumped and placed in a dislocation manner. The heating method is gas heating from the top, and the hot air is pumped to the bottom of the furnace by a fan to form convective heating. Due to the high stacking density of the hub blanks in the stacking method, the hub blanks are stacked on each other, and the hot air cannot fully contact with the hub. The contact between the surface of the blank causes uneven heating of some hub blanks and affects the heat treatment effect. After solid solution, quenching and aging, it is affected by various factors such as gravity and stress, and the hub blank is prone to deformation, resulting in defective products in subsequent machining.

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