A kind of wax pattern structure and its manufacturing method to prevent the thickening of the precision casting blade basin

A manufacturing method and technology of wax molds, applied in the direction of casting and molding equipment, etc., can solve the problems of relying on manual grinding and removal, and achieve the effect of reducing the polishing process, high efficiency and obvious effect

Active Publication Date: 2020-04-07
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention provides a wax pattern structure and a manufacturing method thereof for preventing thickening of the basin of precision cast blades. By adding a partition on the leaf basin area of ​​the wax pattern, the wax pattern and the leaf basin are eliminated. The problem of gaps between layers makes the thickness of the cavity in the leaf basin area of ​​the mold shell meet the requirements, and obtains qualified precision cast blades, reducing the succulent at the leaf basin, and finally solving the problem that the succulent at the leaf basin of the blade needs to be removed by manual grinding problem, improve blade qualification rate and production efficiency

Method used

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  • A kind of wax pattern structure and its manufacturing method to prevent the thickening of the precision casting blade basin
  • A kind of wax pattern structure and its manufacturing method to prevent the thickening of the precision casting blade basin
  • A kind of wax pattern structure and its manufacturing method to prevent the thickening of the precision casting blade basin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] For the secondary working blade of a certain machine, the manufacturing method of the wax mold structure is as follows:

[0043] The chord width of the precision casting blade is narrow, so it is suitable for the anti-expansion method of sticking wax beans 5 or directly using liquid wax to make wax beans 5 . like Image 6 As shown, in the middle of the leaf pot 4, about 50mm away from the tenon and the turning part of the leaf body root, the leaf crown and the turning part of the leaf body root, and at an interval of about 50mm, use liquid wax to make a wax bean 5 with a diameter of Φ3mm and a height of 2mm, a total of 4 indivual. The height of the wax bean 5 can also be 3mm, 5mm, or the like.

Embodiment 2

[0045]The manufacturing method of the wax mold structure for the first-level guide vane of a certain machine is as follows:

[0046] The precision casting blade is a double blade, and the blade chord is long and wide, so it is suitable to use the wax strip anti-expansion method.

[0047] ① Prepare wax strips

[0048] On the high-pressure wax pressing machine, use special wax mold tooling or directly purchase wax strips 8 of Φ3mm to make rib strips. According to the length of the blade body, intercept the wax strips 8 smaller than the length of the blade body by about 30mm for use;

[0049] ②Weld the wax strip to the blade basin

[0050] like Figure 7 As shown, place the prepared wax strip 8 and the upper inner edge plate of the wax mold body 2 in a direction of about 45° from the direction of the outer edge plate, and place them about 15mm away from the air inlet edge 6 and the exhaust edge 7, and Use an electric soldering iron to weld the wax strip to the above positions ...

Embodiment 3

[0054] The manufacturing method of the wax mold structure for the secondary guide vane of a certain machine is as follows:

[0055] The precision casting blade is a double blade, the volume is the largest type of blade precision casting in the workshop, and the blade chord is long, so it is suitable to use the wax strip anti-expansion method.

[0056] ① Prepare wax strips

[0057] On the high-pressure wax pressing machine, use special wax mold tooling to press or directly purchase Φ3mm wax strips 8 to make rib strips. According to the length of the blade body, intercept the wax strips 8 less than the length of the blade body about 40mm for use;

[0058] ②Weld the wax strip to the blade basin

[0059] Place the prepared wax strip 8 and the upper inner edge plate of the wax mold body 2 in a direction of about 70° from the direction of the outer edge plate, and place them at a distance of about 20mm from the air inlet edge 6 and the exhaust edge 7. The blade body root turning p...

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Abstract

The invention provides a wax mold structure for preventing investment casting blade basin thickening and a manufacture method of the wax mold structure. A separation is additionally arranged on a blade basin area on a wax mold, the problem of gaps formed between a wax mold blade basin and a coating layer is solved, and thickening of the blade basin is decreased. The wax mold comprises a wax mold body, a plurality of wax projections are arranged on the surface of the blade basin of the wax mold body, and the surface of the blade basin of the wax mold is divided into a plurality of areas by thewax projections. The manufacture method includes the steps: welding a plurality of wax strips or wax beans on the surface of the blade basin of the wax mold, or dropping liquid wax on the surface of the blade basin of the wax mold to form a plurality of wax beans; dividing the surface of the blade basin of the wax mold into a plurality of areas by the aid of a plurality of wax strips or wax beans.

Description

technical field [0001] The invention belongs to the technical field of investment casting precision casting production, and relates to a wax model structure of investment casting blades, in particular to a method for solving the thickening of the basin part of the precision casting blade, and in particular to a wax model for preventing the basin part of the precision casting blade from being thickened Structure and method of making the same. Background technique [0002] Turbine blades are one of the most important parts of aero-engines, which are precision castings with complex structures. During the drying process of the mold shell, the coating in the large area of ​​the blade basin area is prone to shrinkage and bulge due to the large surface tension. form cavities such as figure 1 As shown in the figure, the cavity thickness of the manufactured mold shell in the blade basin area is increased. The blade basin cast by this mold case is succulent and out of tolerance. In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C7/02
CPCB22C7/02
Inventor 胡颖涛孙礼娜刘晓飞海潮雍坤轩杜阳王玮饶峥
Owner AECC AVIATION POWER CO LTD
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