Vertical resistance-band rapid heating furnace

Abstract

The invention relates to rapid heating equipment used for carrying out surface hardening heat processing on roller bodies of a supporting roller and other large rollers, wherein the supporting roller is used for bearing rolling force and on a metal band rolling mill. A vertical resistance- band rapid heating furnace is provided with a furnace body (9) and a base (18), wherein the furnace body is vertically arranged on the base; the furnace body consists of a furnace floor (15), a furnace chamber and a furnace cover (14); the furnace chamber is internally divided into a upper part region (11),a middle part region (12) and a lower part region (13); each internal wall of the furnace chamber of each region is respectively provided with a resistance-band heating element (10); the resistance-band heating element is connected with a controller; each region is provided with a thermocouple used for measuring temperature; the thermocouple output is connected with the controller; the middle of the furnace floor and the middle of the furnace base are hollow; the furnace cover has a open-type; and the middle of the furnace cover is provided with a circular hole. The heating furnace provided by the invention has the advantages of simple structure, low investment and small occupation area and is dedicated to the rapid heating of the surface layer of the roller body of the supporting roller.

Description

technical field [0001] The invention relates to a rapid heating device, in particular to a rapid heating device for surface hardening heat treatment of back-up rolls and other large roll bodies bearing rolling force on a metal strip rolling mill. Background technique [0002] Due to the rapid development of the steel and non-ferrous metal strip processing industry, the demand for processing strip rolling mills and the rapid increase in the consumption of spare parts for the rolling mills, the consumption of back-up rolls has also doubled. The back-up roll is an important part in the strip rolling mill. Its manufacturing technology is difficult and the production cycle is long. It is a high-tech product in the machinery manufacturing industry. There are two main technical indicators of the backup roll, one is the hardness of the surface area of ​​the roll body, such as figure 1 The schematic diagram of the back-up roll, in which zone 1 is the surface zone of the roll bod...

AI Technical Summary

Problems solved by technology

One type uses industrial frequency power supply induction heating, figure 2 It is a schematic diagram of continuous power frequency induction heating and quenching; the continuous power frequency induction heating and quenching equipment heats the roll 8 through the induction heating coil 4, and its biggest disadvantage is that the depth of the heating layer is insufficient, and only 20-30 mm deep hardening can be achieved. Floor

The other is a flame type gas heating device, image 3 The schematic diagram of the heating device for this purpose; the heated roller 8 is placed on the rotating tugboat 6 on both sides, and the tugboat can drive the roller to rotate. There are two rows of gas burners 7 on both sides of the wheel body, and the flames burned by the burners are sprayed onto the roller surface for heating. The disadvantage of this heating device is that the uniformity of the heating temperature is poor, and the hardness uniformity after quenching is not good

The common disadvantage of these two devices is that the main equipment and auxiliary equipment are relatively complicated, and occupy a large area and require high investment.

Images