Pit-type tempering furnace with pressure control function

Abstract

The invention discloses a pit-type tempering furnace with a pressure control function. The pit-type tempering furnace comprises a furnace cover and a casing, wherein the furnace cover is mounted at the upper part of the casing; heating pipes and an air duct are arranged in the casing; the air duct is covered with the multiple heating pipes; a rotating platform is arranged in a furnace body and can rotate continuously and stably; the rotating platform drives a metal casting to rotate in different directions at different speeds in a heating process, heated air circulation dead angles in the furnace body are eliminated, different areas in a tempering chamber are heated uniformly, further, the metal casting is heated uniformly, and consistent quality of finished products can be guaranteed when massive metal castings are subjected to tempering processing; a smoke exhausting system arranged on the furnace cover solves the problem that the processing effect is affected by continuous increased temperature due to overhigh pressure in the furnace body, can open an auxiliary cover in advance to reduce the pressure in the furnace body and exhausts high-temperature gas in the furnace body when the metal casting is taken out after tempering, and the metal casting is taken out conveniently.

Description

technical field [0001] The invention relates to the field of valve production equipment, in particular to a pressure-controlled well-type tempering furnace. Background technique [0002] The tempering furnace is used for tempering general metal parts in the air and quenching, annealing and aging heat treatment for aluminum alloy die castings, pistons, aluminum plates and other light alloy parts; the metal castings required for valve manufacturing must be tempered. Improve its mechanical properties; the tempering furnace in the prior art has parts in different areas of the furnace that are heated evenly, and the processing results of the parts are quite different when processing a large number of parts. Although the effect is improved by adding a hot air circulation system, when After a large number of parts are loaded into the furnace, the hot air circulation is hindered by the parts, resulting in dead angles in the furnace. At the same time, the placement of the parts canno...

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Problems solved by technology

[0002] The tempering furnace is used for tempering general metal parts in the air and quenching, annealing and aging heat treatment for aluminum alloy die castings, pistons, aluminum plates and other light alloy parts; the metal castings required for valve manufacturing must be tempered. Improve its mechanical properties; the tempering furnace in the prior art has parts in different areas of the furnace that are heated evenly, and the processing results of the parts are quite different when processing a large number of parts. Although the effect is improved by adding a hot air circulation system, when After a large number of parts are loaded into the furnace, the hot air circulation is hindered by the parts, resulting in dead angles in the furnace. At the same time, the placement of the parts cannot be completely consistent, resulting in uneven heating in different areas, and there are obvious differences in the process of temperature rise, maintenance and drop, which eventually leads to The processing results between the parts are inconsistent; and the tempering furnace is in a sealed state, and the high temperature for a long time will easily cause excessive pressure in the furnace body, making it difficult to open the furnace body, and the temperature continues to rise under high pressure, which affects the tempering effect

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