Horizontal multi-layer double circulating air rotary multifunctional metal workpiece heat treatment furnace structure

Abstract

The invention discloses a ''horizontal multi-layer double circulating air rotary multifunctional metal workpiece heat treatment furnace structure'' applicable to the metal heat treatment field. The structure is characterized by setting double air intake adjustable inlet layered air guide plates (1), an air guide cylinder (2), double-arc inner air guide walls (3) and an adjustable opening structure (4), outer air guide walls (5, 6, 7), a double circulating air return structure (8), a double circulating horizontal channel (9), multilayer furnace doors (10), layered annular air guide plates (11), horizontal and beam round tube groups (12, 13, 14). A material rack unit (15) is supported by a rotating shaft (16) and a round tube group (17) to form a multi-layer material platform to place workpieces (20), a motor drives the material platform to rotate around the rotating shaft (16), a heating device provides hot air, and a fan circulates hot air or cold air. The furnace structure provided by the invention realizes hot or cold air zoned distribution control, workpiece heating or cooling is quick and uniform, and the furnace door does not exude air or suck air. With high efficiency and low energy consumption, and compact structure, the furnace structure is especially suitable for solid solution and aging heat treatment of aluminum alloy workpieces.

Description

【Technical field】 [0001] The invention discloses a "horizontal multi-layer double-circulation wind rotary type multifunctional metal workpiece heat treatment furnace structure". It belongs to the field of heating and heat treatment of metal workpieces, especially the field of solid solution and aging heat treatment of high-end aluminum alloy workpieces. 【technical background】 [0002] In the field of metal workpiece heating and heat treatment, especially in the field of solid solution and aging heat treatment of aluminum alloy workpieces and air quenching heat treatment, the rapid, uniform and low-energy heat treatment of aluminum alloy workpieces has always been the pursuit of the industry. [0003] Before heat treatment of metal workpieces, the workpieces must be heated to a certain temperature and held uniformly for a certain period of time. Before solution heat treatment of aluminum alloy workpieces, the workpiece needs to be uniformly heated to about 550°C before solut...

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Problems solved by technology

[0004] The continuous rectangular straight-through heat treatment furnace is realized by configuring multiple burners (burners) or electric heaters in the heating zone and the uniform heat preservation zone. Multi-point heating will inevitably bring about the unevenness of the furnace gas temperature distribution, and then In the process of workpiece heating and heat preservation, the temperature of the workpiece is uneven, especially when the size of the workpiece is complex and the size is uneven, the temperature difference between the surface of the workpiece is large and uneven, and the surface temperature is too high to cause overburning, and the core If the temperature is not enough, it cannot heat efficiently and keep warm evenly, which will affect the quality of heat-treated products

[0005] In order to reduce the surface temperature difference of the workpiece and ensure the uniformity of heating and heat preservation requirements, the continuous rectangular straight-through heat treatment furnace must increase the heating and heat preservation time, which will lead to increased energy consumption and low production efficiency.

In order to ensure the production capacity requirements, the length of the furnace body must be increased, resulting in increased equipment investment, operation and maintenance costs

[0006] In order to reduce the inhomogeneity of furnace gas temperature distribution, the continuous rectangular straight-through heat treatment furnace must increase the number of burners or heaters in the heating zone and heat preservation zone, which will lead to an increase in the cost of manufacturing, control, operation and maintenance of heating equipment

[0007] In the existing continuous rectangular straight-through air quenching heat treatment furnace with material basket, the main reason for the unqualified mechanical properties of the heat treated workpiece is the insufficient flow rate of cooling air around the workpiece or the uneven distribution of flow rate.

[0008] The workpieces in the continuous rectangular straight-through heat treatment furnace are placed linearly, first in, first out, and the entry and exit of specific workpieces cannot be selectively controlled.

Especially when dealing with workpieces of different materials, specifications and batches, it is impossible to control the feeding and discharging process, heating, soaking and quenching and cooling processes separately according to the different materials, specifications and batches of the workpieces and the requirements of the heating process

[0009] The furnace body of the continuous rectangular straight-through heat treatment furnace is long, and the equipment occupies a large area, which increases the cost of site use, equipment manufacturing cost and maintenance cost, especially as the cost of land use, equipment manufacturing and maintenance raw material costs continue to rise. Demands for compactness are constantly increasing

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