Pit furnace with protective atmosphere device and automatic workpiece transferring device in quenching

Abstract

The invention relates to a pit furnace with a protective atmosphere device and an automatic workpiece transferring device in quenching. The pit furnace comprises a furnace body (1), and is characterized in that a protective atmosphere device, a transfer device (2) and a control device are arranged in the furnace body (1), the protective atmosphere device comprises a protective gas input end (3) and a quenching tank (4), the transferring device (2) consists of a translation mechanism and a vertical movement mechanism, the translation mechanism is connected with a shell (5), and the vertical movement mechanism is connected with a lifting hook (6); a first protective gas inlet (7) and an air exhaust port (8) are arranged at the top of the shell (5), and a second protective gas inlet (9) is arranged at the bottom of the shell (5); the first protective gas inlet (7) and the second protective gas inlet (9) are communicated with a protective gas input end (3); and the control device is connected with the control input end of the translation mechanism, the control input end of the vertical movement mechanism, and the control input end of an air valve. The pit furnace not only can prevent oxidation and decarburization of workpieces through protective atmosphere, but also can conduct automatic quenching, a worker does not need to get close to operate at high temperature, the quality of products is improved, and the labor conditions are also improved.

Description

technical field [0001] The invention relates to a quenching device, in particular to a well-type furnace with a protective atmosphere during quenching and a device for automatically transferring workpieces. The invention belongs to the technical field of metal material heat treatment. Background technique [0002] The pit furnace is a cycle furnace, which is suitable for heat treatment of rods and long shaft parts. It has the characteristics of wide distribution and simple and practical equipment. However, in the current process of carburizing and quenching in pit furnaces, when the workpiece is transferred from the furnace body to the quenching tank for quenching, due to the lack of atmosphere protection, the high-temperature workpiece is directly exposed to the air, which easily causes oxidation and decarburization of the workpiece surface. When using a pit furnace for heating and quenching, a manual crane is used to hang the furnace and quench the furnace, which makes it...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned prior art that easily causes oxidative decarburization on the surface of the workpiece, inconvenient operation and poor safety, and to provide a device that can prevent the oxidative decarburization of the workpiece through a protective atmosphere and can automatically lift and transfer the workpiece. Pit type furnace with protective atmosphere in quenching and automatic workpiece transfer device

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