Dead head heating easily-cutting piece of large steel casting

Abstract

The invention relates to a dead head heating easily-cutting piece of a large steel casting. The dead head heating easily-cutting piece is characterized in that an upslope port, a lower slop port and a fracture of the easily-cutting piece are made of materials of a core, and the diameter of the upslope port of the easily-cutting piece is less than that of a dead head; an included angle between the upslope port and the upper surface of the fracture is 135-150 degrees, and an included angle between the lower slop port and the lower surface of the fracture is 120-150 degrees; the height from the lower slop port to the surface of the large steel casting is 1 / 5-1 / 4 of the thickness of the easily-cutting piece, the thickness of the fracture is 1 / 5-1 / 4 of the thickness of the easily-cutting piece, and a heating rod is positioned on a contact surface of the upslope port and the dead head and is perpendicular in the upper surface of the casting; the heating rod is made of an iron chrome aluminum electrothermal alloy material, is positioned on the contact surface of the upslope port and the dead head and is perpendicular in the upper surface of the casting, and can be reused. The dead head heating easily-cutting piece provided by the invention has the advantages that the specially-designed easily-cutting piece and a heating technique are adopted, so that the diameter of a dead head neck is greatly reduced, the section of the dead head is small, and the easily-cutting piece is easy to cut off.

Description

technical field [0001] The invention relates to a heating easy-cutting piece for a riser of a large steel casting, in particular to a heatable and easy-cutting easy-cutting piece for a riser. Background technique [0002] In the production process of castings, in order to prevent the formation of shrinkage cavities, a riser should be placed at the final solidified place for feeding. Sometimes the weight of the riser of a steel casting is equivalent to more than 50% of the weight of the casting, or even exceeds the weight of the casting. After the casting is solidified, these risers must be cleaned up. The work of cutting off the risers is a very heavy work. Generally, oxygen and acetylene gas are used to cut off the risers of steel castings. The larger the fracture area, the more energy is consumed. And it is easy to cause cracking of castings. The easy-to-cut riser in the prior art is to place a cutting piece at the root of the riser, and the molten metal feeds the casting...

AI Technical Summary

Problems solved by technology

However, the diameter of the riser is directly proportional to the thickness of the easy-to-cut piece, especially for large steel castings, the thickness of the cut piece will exceed 100mm, and the thick cut piece will absorb the heat of the metal in the riser, making the riser fast Solidification, and will first solidify in the neck of the riser, blocking the feeding channel of the riser

At the same time, as the reserved hole becomes smaller, the feeding channel of the casting will solidify first, and the feeding channel of the riser will also be interrupted, so that the riser will not be able to achieve the pre-feeding effect on the casting, and will also cause defects in the casting. even casting scrap

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