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Casting method and leveling tool for large multi-blade casting

A multi-blade and casting technology, which is applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems that the mechanical properties cannot fully meet the technical requirements, and achieve the effects of shortening the production cycle, reducing carbon planing, and ensuring the quality of castings

Active Publication Date: 2010-12-22
YICHANG MARINE DIESEL ENGINE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The rotor material grade is ZGD410-620, which is ordinary carbon steel, and generally adopts ordinary normalizing + tempering heat treatment. Under the existing technical conditions, the mechanical properties cannot fully meet the technical requirements.

Method used

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  • Casting method and leveling tool for large multi-blade casting
  • Casting method and leveling tool for large multi-blade casting
  • Casting method and leveling tool for large multi-blade casting

Examples

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Embodiment Construction

[0033] The casting method and leveling tool for large multi-blade castings, taking the 18.0 hydraulic dynamometer rotor as an example, includes the following steps:

[0034] 1) Prepare the casting process according to the 18.0 hydraulic dynamometer rotor drawing, the process diagram is as follows figure 1 , figure 2 , image 3 shown.

[0035] The solid wood sample, the outer mold is made into a whole, the radial scale is 1.6%, the axial scale is 2.0%, and the drafting angle is 1°; Production, the height is staggered to prevent the cumulative error of blade position and wall thickness size; the outer mold makes a lower core sand filling plate 7 for blade sand core 2, leaving space for the bottom core of the last blade sand core 2.

[0036] 2) Making a leveling tool for blade sand core 2, the leveling tool is a lever mechanism, one end is provided with a quick joint 15, the middle is provided with a lifting ring 18, and the other end is provided with a moving weight 16. ac...

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PUM

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Abstract

The invention discloses a casting method and a leveling tool for a large multi-blade casting. The method comprises the following steps of: preparing a die; preparing a blade sand core leveling tool; mixing sand; modeling; preparing a core; distributing; smelting and pouring; and reshaping carrying out heat treatment to obtain the large integral cast multi-blade casting. In the casting method of the invention, the core is stably placed when in an incline state, the blade wall thickness size of the casting is accurate, less cracks are discovered at the connecting positions of the blades and the outer edge, and the mechanical performance of a material can meet the technical requirement, therefore, the invention avoids the nonuniformity of a chemical component and the mechanical performance of the material during split casting, reduces casting deformation and the procedures of processing, assembly, and the like needed by the split casting, improves quality, lowers the cost and shortens the production cycle.

Description

technical field [0001] The invention relates to a casting method and device for castings, which are particularly suitable for casting of large multi-blade castings with a plurality of inclined sheet structures. Background technique [0002] Large multi-blade castings, such as hydraulic dynamometer rotors, have a diameter of Φ3730mm, a mass of 24500kg, and a total of 38 symmetrically inclined upper and lower blades. Under the existing technical conditions, the 19 sand cores of the upper sand mold and the upper half blade of the casting are suspended cores and the quality of the overall turning cannot be guaranteed. Generally, the upper and lower halves are cast separately. Figure 5 As shown in the figure, the uniformity of chemical composition and mechanical properties of the two half rotor materials cannot be guaranteed, and the processing and assembly processes required for the split casting of the castings are increased, and the production cost and cycle are increased. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/10B22C9/22
Inventor 刘为作黄浩龚汉彬
Owner YICHANG MARINE DIESEL ENGINE
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