Cutting method of sand sticking riser of steel casting

Abstract

The invention belongs to the field of casting production, and provides a cutting method of a sand sticking riser of a steel casting. The cutting method mainly utilizes the introduction of a combustion-supporting material in a cutting flame to play a combustion-supporting and melting-assisting role, meanwhile, a large amount of heat is simultaneously released, the temperature of a to-be-cut part isimproved, the melting point of a substance at the sand sticking part of a to-be-cut riser is reduced, molten slag with good fluidity is generated, and meanwhile, the cutting method simultaneously utilizes flame high-speed airflow to blow away the molten slag to form a cutting seam; and in this way, the cutting is continued, and the riser with serious sand sticking is cut off. By adopting the cutting method, the effect is remarkable, meanwhile, the method is simple, the operability is high, and the adopted combustion-supporting material is a low-cost pure iron or low-carbon steel material andthe like, so that the cost is saved remarkably.

Description

technical field [0001] The invention belongs to the field of casting production, and proposes a fast and low-cost cutting method for steel castings with severe sand sticking on risers. Background technique [0002] In the production process of steel castings, especially the casting production of large steel castings, the most cost-effective method to remove the gating system is to use flame cutting, and the most commonly used flame cutting gases are acetylene, propane, liquefied petroleum gas , natural gas, etc. Considering all aspects of pollution, energy consumption, cost and safety, natural gas is currently the most suitable gas for cutting. The temperature of natural gas-oxygen flame is generally about 2000°C, the highest is 2710°C, while the melting point of steel is about 1515°C. If the riser does not stick to sand, it is no problem to use traditional natural gas-oxygen to cut the riser. However, due to production quality control and other reasons, there are often se...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the riser of steel castings with severe sand stickiness, the invention provides a method for cutting the riser with convenient operation, which effectively solves the problem of difficult cutting of the sand sticky riser in the prior art