Rotary quick uniform low-energy heating furnace structure for metal billets

Abstract

The invention discloses a rotary quick uniform low-energy heating furnace structure for metal billets and is applicable to the field of metal forge and press. The rotary quick uniform low-energy heating furnace is characterized in that the rotary quick uniform low-energy heating furnace structure is provided with layered hot-air inlet air deflectors (1), a layered circular air deflector (2), biarc inner air deflection walls (3), a central closed air deflection cylinder (5), an outer air deflection wall (6), double horizontal air-return passages (8), return hot-air inlet structures (9), a rotary spindle (14), a long round pipe set (10) supporting multilayer horizontal ring sets (11), and short round pipe sets (15) supporting a rack storing billets (17). The outer air deflection wall is provided with multiple layers of furnace doors (18), a driving mechanism drives the spindle (14) to rotate, a heating device provides hot air, and the hot air circulates by a fan. The problems about high-speed uniform distribution of hot air, quick and uniform heating, efficient low-energy utilization, air leak and suction of the furnace doors are solved. The heating furnace structure is compact, low in hot-air flow resistance and energy consumption, fast and uniform in heating and quite applicable to heating aluminum alloy bars.

Description

【Technical field】 [0001] The invention discloses a "revolving metal billet heating furnace structure with rapid uniformity and low energy consumption". The invention belongs to the field of metal forging and extrusion forming, especially the heating field of aluminum alloy forging extrusion forming blank. 【technical background】 [0002] In the field of metal forging, especially in the field of aluminum alloy forging and extrusion molding, rapid, uniform and low-energy heating of blanks has always been the pursuit of the industry. [0003] Before forging or extrusion of aluminum rods, the blank needs to be heated quickly and uniformly to about 500°C. The length of the traditional rectangular straight-through billet heating furnace is generally about 12 meters, and the billet goes forward and ends in a cycle. In order to meet the process requirements, the inlet door and the outlet door must be large enough, and the equipment cannot be closed during operation; in addition, the...

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Problems solved by technology

[0004] The heating of the rectangular straight-through gas-fired billet heating furnace is realized by configuring one or more combustion devices (burners) in the heating zone and the heat preservation zone. And the inhomogeneity of the billet temperature during the heat preservation process, especially when the billet size is large, the temperature difference between the core and the surface of the billet is too large, the surface temperature is too high to cause overburning, and the core temperature is not enough, resulting in forging and extrusion molding process Difficulties affecting product quality

[0005] In order to reduce the temperature difference between the core and the surface of the billet, the rectangular straight-through gas billet heating furnace must lengthen the heating and holding time of the billet, which leads to increased energy consumption in the heating process and low production efficiency of the equipment

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

[0007] The billets of the rectangular straight-through billet heating furnace are placed linearly in the furnace, first in first out, and cannot selectively control the entry and exit of specific billets

Especially when processing blanks of different materials or specifications, it is impossible to control the feeding and discharging process separately according to the heating process requirements of the material or specifications of the blanks

[0008] The furnace body of the rectangular straight-through billet heating furnace is long, and the equipment occupies a large area, which increases the cost of site use, equipment manufacturing and maintenance costs, especially with the continuous rise of land use costs, equipment manufacturing and maintenance raw material costs, the compact Sexual demands are constantly increasing

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