Dead head heating easily-cutting piece of large steel casting

Abstract

The invention relates to a heating easy-cut piece for a riser of a large-scale steel casting. The diameter of the riser, the angle between the upper groove and the upper surface of the fracture is 135-150 degrees, the angle between the lower groove and the lower surface of the fracture is 120-150 degrees, and the height of the lower groove from the surface of the casting is The thickness of the easy-cut sheet is 1 / 5-1 / 4, and the thickness of the fracture is 1 / 5-1 / 4 of the thickness of the easy-cut sheet; the heating rod is located on the contact surface between the upper bevel and the riser, and is perpendicular to the upper surface of the casting. . The heating rod is an iron-chromium-aluminum electric heating alloy heating rod, which is located on the inside where the contact surface between the upper bevel and the riser is perpendicular to the upper surface of the casting, and can be reused. Due to the use of specially designed easy-to-cut pieces and heating technology, the diameter of the riser neck can be greatly reduced, making the riser section smaller and easier to cut.

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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