Heavy-loading large vacuum heat treatment furnace

Abstract

The invention relates to a heavy-loading large vacuum heat treatment furnace. The heavy-loading large vacuum heat treatment furnace is mainly composed of a heating chamber and a cooling chamber; the heating chamber is of a square structure, a fixed heat preservation layer is arranged in the heating chamber, a plurality of heating pieces are arranged in the fixed heat preservation layer in an up-down mode, and a movable heat preservation layer is arranged above the heat preservation layer at the bottom of the fixed heat preservation layer; a hot air circulating device is arranged on the upper part of the cooling chamber, a rotary supporting plate is arranged in the middle of the cooling chamber, a quenching tank is arranged at the lower part of the cooling chamber, a lifting mechanism is arranged at the bottom of the quenching tank, and a rotary supporting plate is connected above the lifting mechanism; and rail grooves are formed in the middle of the movable heat preservation layer andthe rotary supporting plate, feeding trolleys can be borne on the rail grooves, the bottoms of the feeding trolleys are provided with movable rollers, the movable rollers linearly move on the rail grooves, and the heating chamber and the cooling chamber are connected through a movable door. According to the heavy-loading large-scale vacuum heat treatment furnace, a large-scale workpiece loading trolley can move between the heating chamber and the cooling chamber, the cooling speed is increased, and the hardenability of the quenching is improved.

Description

technical field [0001] The invention relates to the field of metal vacuum heat treatment, in particular to a heavy-load large-scale vacuum heat treatment furnace. Background technique [0002] With the continuous development of the metal processing industry, metal heat treatment has become an indispensable part; metal heat treatment has also developed from the original ordinary box-type heat treatment to vacuum heat treatment, and the current vacuum heat treatment has also developed from the original miniaturization to large-scale development; vacuum Heat treatment is roughly divided into two types: oil quenching and gas quenching. Vacuum air quenching mainly relies on gas to achieve cooling, so the cooling rate is not enough and the hardenability is not enough if the furnace is too large. Although the cooling speed of the vacuum oil quenching furnace is sufficient, because it is divided into two chambers, the loading and unloading of the material depends on the forklift in ...

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Problems solved by technology

[0002] With the continuous development of the metal processing industry, metal heat treatment has become an indispensable part; metal heat treatment has also developed from the original ordinary box-type heat treatment to vacuum heat treatment, and the current vacuum heat treatment has also developed from the original miniaturization to large-scale development; vacuum Heat treatment is roughly divided into oil quenching and gas quenching. Vacuum air quenching mainly relies on gas to achieve cooling, so the cooling rate is not enough and the hardenability is not enough if the furnace is too large.

Although the cooling speed of the vacuum oil quenching furnace is sufficient, because it is divided into two chambers, the loading and unloading of the material depends on the forklift in the cold room. If the workpiece is very long, the forklift cannot realize the unloading at all; The maximum loading capacity of the vacuum oil quenching furnace is only about 2 tons

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