Special quenching system for box type quenching furnace

Abstract

The invention relates to a special quenching system for a box type quenching furnace. The special quenching system comprises a quenching furnace, a quenching pool and a feeding device, the quenching pool is arranged at one end of the quenching furnace, feeding guide rails are arranged on the two sides of the quenching pool, and the feeding device is arranged on the feeding guide rails; the feedingdevice comprises a portal frame and a lifting frame, two sets of guide wheels are arranged at one end of the portal frame, the lifting frame is arranged between the two sets of guide wheels, a fixingseat is arranged at the lower end of the lifting frame, a shoveling claw is arranged on one side of the fixing seat, a sliding rail is arranged on the portal frame, a driving air cylinder is arrangedat the lower end of the portal, a piston rod of the driving air cylinder is connected with a lifting plate, movable wheels are arranged at two ends of the lifting plate, the movable wheel is arrangedon the sliding rail, a fixed pulley is arranged on the lifting plate, a chain is arranged on the fixed pulley, one end of the chain is connected with one side of the middle of the portal frame, the other end of the chain is connected with the top of the fixed seat, and a mounting seat is driven by the driving air cylinder to rise, so that the chain pulls the lifting frame to rise under the actionof the fixed pulley. Workpieces in the furnace are rapidly transferred to the quenching pool for quenching, and the quality of products in the same furnace is basically consistent.

Description

technical field [0001] The invention belongs to the technical field of heat treatment equipment, and in particular relates to a special quenching system for a box-type quenching furnace. Background technique [0002] The quenching furnace is a furnace that heats the workpiece before quenching. Quenching is to put the workpiece into the furnace and heat it to the quenching temperature above the critical point and keep it for a period of time, then quickly take the workpiece out of the furnace and put it into the cooling liquid (oil or water) for quenching. [0003] The existing well-type furnace needs to be loaded and unloaded by crane hoisting for heating; These two methods of operation have the following defects: the well-type furnace is first quenched after the furnace, and the quenching of shaft parts has high requirements for the plant, which needs to reach 2.5 times the height of the highest part, and also has high requirements for the foundation. The cost of high-span...

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Problems solved by technology

These two methods of operation have the following defects: the well-type furnace is first quenched after the furnace, and the quenching of shaft parts has high requirements for the plant, which needs to reach 2.5 times the height of the highest part, and also has high requirements for the foundation. The cost of high-span plant and underground foundation is very high. High, high temperature out of the furnace, the safety performance of personnel operation is not high

The trolley furnace cannot hoist the same batch of products at one time, and it needs to be hung manually, which is slow and low in work efficiency; moreover, the hoisting process is easy to cause the workpiece to swing and fall, and the safety performance is not high

The overturning trolley can realize the rapid quenching of the workpiece as a whole, but there are defects such as scratches and bruises on the workpiece, the quenching pool after the workpiece enters the water is not ideal, it is inconvenient to salvage the workpiece, and there are many mechanical failures of the overturning mechanism after long-term use.

However, the lifting furnace door structure of the existing box-type quenching furnace is a rectangular structure, and there will be a certain gap between the furnace mouth and the furnace door, which will cause the heat inside the quenching furnace to dissipate, thereby affecting the performance of the product and reducing the quality of the product , and the existing furnace doors are equipped with electric heating elements, the electric heating elements are easily damaged by collision during the lifting process of the furnace door

Moreover, after the coolant in the existing quenching pool absorbs the heat of the workpiece, it often causes heat accumulation, which makes the temperature of the coolant too high and affects the cooling effect, resulting in that the quality of the product cannot be guaranteed.

In addition, in order to save costs, the coolant in the quenching pool is recycled, and the coolant will accumulate a large amount of impurities when used for a long time, which will easily affect the cooling effect of the workpiece, thereby affecting the quenching quality of the workpiece

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