Method for controlling hollow guide blade upper edge plate cavity wall thickness

A technology of hollow guide and cavity wall, which is applied in the direction of mold, core, mold composition, etc., can solve the problems of high production cost, uneven wall thickness, low product qualification rate, etc., to avoid out-of-tolerance and scrap, The effect of improving the qualified rate of products and ensuring the uniformity of wall thickness

Active Publication Date: 2015-09-23
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wall thickness of the upper edge plate casting of the hollow guide vane produced by this method of controlling the wall thickness of the upper edge plate casting of the hollow guide vane is uneven in the hollow part, the upper wall thickness 5 is thicker, and the lower wall thickness 6 is thinner, which does not satisfy Design drawing requirements, resulting in out-of-tolerance or even scrapping, low product qualification rate and high production cost

Method used

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  • Method for controlling hollow guide blade upper edge plate cavity wall thickness
  • Method for controlling hollow guide blade upper edge plate cavity wall thickness
  • Method for controlling hollow guide blade upper edge plate cavity wall thickness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see Figure 1 to Figure 5 , the method for controlling the cavity wall thickness of the upper edge plate of the hollow guide vane, the cavity refers to the cavity formed by the ceramic core 7 inside the trailing edge of the upper edge plate 1 of the hollow guide vane, and the wall thickness of the cavity refers to The upper wall thickness of the cavity is 5 and the lower wall thickness of the cavity is 6; it is characterized in that the wall thickness of the casting cavity is controlled by changing the wall thickness of the wax model cavity of the upper edge plate of the hollow guide vane, and the ceramic core 7 core body 3 The leading edge of the core is tilted toward the non-runner surface, so that the angle between the lower surface 11 of the core body 3 and the wax mold runner surface 10 of the upper edge plate of the hollow guide vane is α=0°30′, and the specific steps are as follows:

[0036] 1. Determine the position of the central point of the waxy core support ...

Embodiment 2

[0047] see Figure 1 to Figure 5 , the method for controlling the cavity wall thickness of the upper edge plate of the hollow guide vane, the cavity refers to the cavity formed by the ceramic core 7 inside the trailing edge of the upper edge plate 1 of the hollow guide vane, and the wall thickness of the cavity refers to The upper wall thickness of the cavity is 5 and the lower wall thickness of the cavity is 6; it is characterized in that the wall thickness of the casting cavity is controlled by changing the wall thickness of the wax model cavity of the upper edge plate of the hollow guide vane, and the ceramic core 7 core body 3 The leading edge of the core is tilted toward the non-runner surface, so that the angle α between the lower surface 11 of the core body 3 and the wax mold runner surface 10 of the upper edge plate of the hollow guide vane is α = 0°45′, and the specific steps are as follows:

[0048] 1. Determine the position of the central point of the waxy core supp...

Embodiment 3

[0059] see Figure 1 to Figure 5 , the method for controlling the cavity wall thickness of the upper edge plate of the hollow guide vane, the cavity refers to the cavity formed by the ceramic core 7 inside the trailing edge of the upper edge plate 1 of the hollow guide vane, and the wall thickness of the cavity refers to The upper wall thickness of the cavity is 5 and the lower wall thickness of the cavity is 6; it is characterized in that the wall thickness of the casting cavity is controlled by changing the wall thickness of the wax model cavity of the upper edge plate of the hollow guide vane, and the ceramic core 7 core body 3 The leading edge of the core is tilted toward the non-runner surface, so that the angle α between the lower surface 11 of the core body 3 and the wax mold runner surface 10 of the upper edge plate of the hollow guide vane is α = 1°, and the specific steps are as follows:

[0060] 1. Determine the position of the central point of the waxy core support...

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Abstract

The invention belongs to the precise investment casting technology and relates to a method for controlling aero-engine hollow guide blade upper edge plate cavity wall thickness. The method is characterized in that the hollow guide blade upper edge plate wax pattern cavity wall thickness is changed to control casting cavity wall thickness, the front edge of the core body (3) of a ceramic core (7) is allowed to tilt towards a non-runner face, and the included angle alpha of the lower surface (11) of the core body (3) and the runner face (10) of a hollow guide blade upper edge plate wax pattern is allowed to range from 0 degree 30 minutes to 1 degree. By the method, hollow guide blade upper edge plate casting wall thickness evenness at hollow parts is guaranteed, design drawing requirements are satisfied, oversize and scrap are avoided, production yield is increased, and production cost is lowered.

Description

technical field [0001] The invention belongs to investment precision casting technology, and relates to a method for controlling the wall thickness of an upper edge plate cavity of an aeroengine hollow guide vane. Background technique [0002] The top view of the precision casting of the upper edge plate of the hollow guide vane of a certain type of aero-engine see figure 1 and figure 2 , which is one of the key hot-end parts of the aero-engine, there are two cavities at the trailing edge of the upper edge plate 1 of the hollow guide vane, which are formed by the ceramic core 7, and the ceramic core 7 is only supported by the core head in the shell. 4 One end is positioned, the core body 3 is a cantilever structure, and the upper and lower wall thicknesses of the cavity in the casting of the upper edge plate of the hollow guide vane after casting are equal. The existing method for controlling the wall thickness of the upper edge plate casting of the hollow guide vane is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02B22C9/04
Inventor 朱珍珠张凌峰海潮常涛岐
Owner AECC AVIATION POWER CO LTD
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