Splicing frog casting system and casting method

A frog and pouring system technology, which is applied in casting equipment, casting molding equipment, casting molds, etc., can solve the problems of product shrinkage, shrinkage, failure to meet the quality level requirements of radiographic flaw detection, and limited overseas market expansion. Eliminate shrinkage cavity shrinkage, improve internal quality, and enhance market competitiveness

Active Publication Date: 2020-02-28
CHINA RAILWAY SHANQIAO GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the existing technology, the casting of assembled high manganese steel frog castings adopts the casting method of ordinary industrial frogs, and the products obtained by casting have casting defects such as shrinkage cavities and ...

Method used

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  • Splicing frog casting system and casting method
  • Splicing frog casting system and casting method
  • Splicing frog casting system and casting method

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Embodiment

[0031] see figure 1 , an assembled frog casting system provided by an embodiment of the present invention, such as figure 1 As shown, the system includes a gating system, and the gating system communicates with the frog toe end of the frog cavity formed inside the casting mold 6; , the pouring and feeding riser assembly 2 is located between the sprue assembly 1 and the casting mold 6; further, the pouring and feeding riser assembly 2 includes a conical riser with a large upper part and a smaller lower part The mouth cavity, the slope of the riser cavity is 1:1.5. The assembled frog casting system in the prior art adopts inclined pouring, and the pouring system at the toe end only has vent holes and no feeding riser. Since the cooling of the pouring end is slow, if the subsequent molten steel supply is insufficient, the feeding amount is insufficient. There are shrinkage cavity defects on the pouring end face. In the solution provided by this application, a pouring feeding r...

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Abstract

The invention discloses a splicing frog casting system and a casting method. The system comprises a pouring system, wherein the pouring system communicates with a frog toe end of a frog cavity formedin the casting mold, and the pouring system comprises a pouring gate component and a pouring and feeding open riser component. According to the splicing frog casting system, a toe end pouring system is provided with a pouring and feeding open riser, a casting is provided with a heating thermal insulation necking blind riser, the risers are arranged between holes, the rail top surface between the risers is matched with the strip-shaped bright iron, inclined pouring is carried out, and after pouring, a cold box opening process is adopted, and the casting is placed at the room temperature for hammering to remove the risers. Under the condition of inclined pouring, sequential solidification is achieved, the heating thermal insulation riser and a cold iron are matched, sufficient feeding is obtained on the frog rail surface, the risers are removed by using a hammering mode after opening, cracks caused by flame cutting are avoided, and casting defects such as shrinkage porosity are completely eliminated through ray inspection.

Description

technical field [0001] The invention relates to the technical field of manufacturing high manganese steel frog castings, in particular to an assembled frog casting system. Background technique [0002] Cast manganese-steel frog refers to a frog that is integrally cast with high manganese steel. High manganese steel has high strength and impact toughness. The overall casting can be shaped freely, and the size and shape of each part of the frog can be made to meet the requirements of smooth driving as much as possible. [0003] In the existing technology, the casting of assembled high manganese steel frog castings adopts the casting method of ordinary industrial frogs, and the products obtained by casting have casting defects such as shrinkage cavities and porosity, which cannot reach the quality level of radiographic flaw detection stipulated by the American AREMA standard Therefore, it is impossible to enter the first-class line in North America, and the expansion of overs...

Claims

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Application Information

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IPC IPC(8): B22C9/22B22C9/02B22C9/08B22D15/00B22D31/00B22D35/04
CPCB22C9/02B22C9/082B22C9/088B22C9/22B22D15/00B22D31/00B22D35/04
Inventor 马兰英张晓宇畅国纪
Owner CHINA RAILWAY SHANQIAO GRP CO LTD
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