Base roller transmission type continuous carbonizing heat treatment furnace

Abstract

The invention relates to an industrial furnace bottom roller-driven continuous carburizing heat treatment furnace, which belongs to metal heat treatment equipment. The present invention consists of a preheating chamber, a heat treatment chamber, a quenching chamber 1 and a quenching 2 chamber. The preheating chamber is equipped with gas burners. In order to transfer the workpiece, each station is equipped with an independent motor, and the motor drives a group of furnace bottom rollers connected together by chains to rotate forward, or when the workpiece reaches the designated station, each group of furnace bottom rollers The shaft rotates 180° forward or backward at regular intervals, and two sets of intersecting photoelectric sensors are installed at each station. The transfer speed of the workpiece can be controlled according to the heat treatment process, and the atmosphere gas, cycle time and temperature of the four chambers can be controlled separately; the waiting time when the heat treatment process is changed is shortened. Due to the minimum fluctuation of the atmosphere gas in the furnace, the carburizing state of the workpiece is uniform, and the metallographic structure of the structure is uniform, so better high-quality products can be obtained.

Description

technical field [0001] The invention relates to a metal heat treatment equipment, especially composed of a preheating room, a heat treatment room, a quenching room 1 and a quenching room 2, and each station in each room is equipped with an independent motor, and the motors are driven by chains. A group of multiple furnace bottom rollers rotates forward, or when the workpiece reaches the designated station, each group of furnace bottom rollers rotates 180° forward or backward at regular intervals, and each station is equipped with two cross photoelectric sensor. The running speed of the workpiece can be controlled according to the heat treatment process. At the same time, the atmosphere gas, cycle time and temperature of each chamber can be controlled separately. The fluctuation of the atmosphere gas in the furnace is the smallest, so that the carburizing state of the workpiece is average and the structure of the organization is uniform. Transmission type continuous carburizin...

AI Technical Summary

Problems solved by technology

[0009] However, in order to meet the different process conditions of each chamber, the waiting time and advancing time of workpieces in each chamber are different, and deformation such as sinking of furnace bottom rollers will occur due to high temperature, and this deformation has nothing to do with the size of the bracket on which the workpiece is installed.

In addition, all furnace bottom rollers are always started at the same time for a certain period of time to move forward, thus causing many problems, such as controlling the heat-treated workpiece to stay in the heat treatment furnace but unable to control the moving speed of the workpiece in the furnace, so the actual needs cannot be obtained. performance, substandard products are produced in the workpiece

[0010] In addition, due to different workpieces and different heat treatment processes, different workpieces cannot be heat treated at the same time. We can only wait until the heat treatment of the previous batch of workpieces is completed, and then adjust the process before loading the next batch of workpieces.

This results in empty pallets being sent into the furnace, wasting time waiting for the last batch of heat-treated workpieces

[0011] In the heat treatment furnace of the prior art, the workpiece must be cleaned to remove oil stains before entering the preheating chamber, which increases the cleaning process and cleaning equipment, and the cost is high

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