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Casting method of castings provided with risers

A casting process and casting technology, applied in manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of unsatisfactory tensile strength, elongation and yield strength, unreasonable smelting process and pouring process, etc. The effect of improving service life, preventing shrinkage and improving tensile strength

Active Publication Date: 2015-10-07
ZHEJIANG OUYEDA MACHINE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of ductile iron castings, the cooling and solidification is from the outside to the inside. The outside cools quickly, and the inside cools slowly. After the cooling and solidification process, it is easy to loosen the wall thickness of the casting and produce scrap parts.
In addition, the smelting process and pouring process of the existing bearing cap casting are relatively unreasonable, resulting in unsatisfactory properties of the casting such as tensile strength, elongation and yield strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] Embodiment: the casting process of the casting with riser, specifically comprises the following steps:

[0018] a. Make a template; the template includes a base plate, the base plate is provided with a main body of the punch, and a cylindrical column is provided on the side of the main body of the punch;

[0019] b. Make sand molds; fix the sand box on the mold plate, fill the sand box with sand, and obtain a sand mold. The sand mold includes a sand mold body, and a mold cavity is formed in the sand mold body, and a riser corresponding to the table column is formed in the mold cavity;

[0020] c. Set the core in the cavity; the core, that is, the small sand core, is set to form a small cavity inside the casting;

[0021] d, smelting; smelting to obtain molten iron, the molten iron includes CE4.4-4.7%, C3.0-3.9%, Si1.8-3.0%, Mn≤0.2%, P≤0.3%, S≤0.03%, Mg0.02-0.065%, Ni0.1-0.2%, nodulizer 1.0%, inoculant 0.6%, flow inoculant 0.1%, the rest is Fe;

[0022] e. Pouring: pou...

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PUM

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Abstract

The invention discloses a casting method of castings provided with risers. The casting method comprises following steps: template manufacturing, sand mould manufacturing, even core arranging, smelting, pouring, riser removing, and obtaining of finished products. The casting method is capable of solving a problem that casting loose is easily caused, and increasing product qualified rate, tensile strength, elongation percentage, and yield strength, and possesses excellent beneficial effects.

Description

technical field [0001] The invention relates to a casting process, and is characterized in that it relates to a casting process of a casting with a riser. Background technique [0002] In large mechanical equipment, bearing cap is one of the most common parts. A common bearing cap includes a main body of the bearing cap. The main body of the bearing cap has a mold cavity inside. The bottom of the main body of the bearing cap has a bottom edge, and a group of cylindrical fixing posts are arranged on the inner surface of the bottom edge. The casting process of existing castings is to pour molten iron into sand molds, and to obtain castings after being cooled. Due to the characteristics of ductile iron castings, the cooling and solidification is from the outside to the inside, the outside is cooled quickly, and the inside is cooled slowly. After the cooling and solidification process, the wall thickness of the casting is easy to become loose, resulting in scrapped parts. In a...

Claims

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Application Information

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IPC IPC(8): C22C37/10C21D5/00B22C9/08
Inventor 宁林祥
Owner ZHEJIANG OUYEDA MACHINE MFG