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Manufacturing method of propeller blade

A manufacturing method and propeller technology, which are applied to other household appliances, household appliances, household components, etc., can solve the problems of difficulty in controlling the foaming density of polyurethane foam, great influence on product quality, low strength of polyurethane foam, etc., so as to solve production defects. , shorten the production cycle, good adhesion effect

Inactive Publication Date: 2019-06-07
保定国奥新能源工程材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of this method is: the polyurethane foam has low strength, basically has no effect on the structural strength, and only plays a filling role. For products with high strength requirements, it cannot meet the requirements; the foaming density of polyurethane foam is difficult to control, and the weight error Larger, poor foaming uniformity, which has a great impact on product quality. In addition, polyurethane will absorb resin; for the process that requires high temperature molding, polyurethane has poor temperature resistance. When the temperature exceeds 80°C, it will soften and deform, which cannot meet the requirements. ;Traditional molding process, no vacuum pressurization process, excess resin will remain in the product, and the product is heavy

Method used

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  • Manufacturing method of propeller blade
  • Manufacturing method of propeller blade
  • Manufacturing method of propeller blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The size of the propeller blade that present embodiment manufactures is: rotation diameter (that is, when the propeller rotates, the diameter of its blade tip track circle) 1.5 meters, length 705 millimeters, width 147 millimeters, thickness 91 millimeters.

[0072] The manufacturing method of this embodiment is:

[0073] (1) According to the three-dimensional dimensions of the propeller, by calculating the thickness of the layer, the three-dimensional drawing of the sandwich foam inside the propeller is obtained, the numerical control processing program is customized, and the PMI foam blank of the appropriate size is customized. The material model is RP-D60, and the density is 60kg / cubic. Put the PMI blank into the three-axis CNC machining center. Because the foam material is soft, it cannot be clamped with a common fixture. Therefore, after adjusting the position, fix the material firmly with hot melt adhesive. Due to the large thickness of the blank material and the ...

Embodiment 2

[0078] The size of the propeller blade that present embodiment manufactures is: rotating diameter 5 meters, length 2350 millimeters, width 211 millimeters, thickness 45 millimeters.

[0079] The manufacturing method of this embodiment is:

[0080] (1) According to the three-dimensional dimensions of the propeller, by calculating the thickness of the layer, the three-dimensional drawing of the sandwich foam inside the propeller is obtained, the numerical control processing program is customized, and the PMI foam blank of the appropriate size is customized. The material model is RP-D60, and the density is 60kg / cubic. Put the PMI blank into the three-axis CNC machining center. Because the foam material is soft, it cannot be clamped with a common fixture. Therefore, after adjusting the position, fix the material firmly with hot melt adhesive. Due to the large thickness of the blank material and the softness of the foam material, a custom-made R4 double-edged flat end mill is used ...

Embodiment 3

[0085] The size of the propeller blade that present embodiment manufactures is: diameter of rotation: 720 millimeters, long 720 millimeters, wide 64 millimeters, thickness 25 millimeters.

[0086] The manufacturing method of this embodiment is:

[0087](1) According to the three-dimensional dimensions of the propeller, by calculating the thickness of the layer, the three-dimensional drawing of the sandwich foam inside the propeller is obtained, the numerical control processing program is customized, and the PMI foam blank of the appropriate size is customized. The material model is RP-D60, and the density is 60kg / cubic. Put the PMI blank into the three-axis CNC machining center. Because the foam material is soft, it cannot be clamped with a common fixture. Therefore, after adjusting the position, fix the material firmly with hot melt adhesive. Due to the large thickness of the blank material and the soft foam material, a custom-made R3 double-edged flat end mill is used with a...

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Abstract

The invention provides a manufacturing method of a propeller blade. The manufacturing method comprises the following steps of preparing a clamp core of the propeller blade by a numerical control machining method; wrapping the clamp core with fiber cloth impregnated with resin; vacuumizing and pressurizing the resin to cure the resin; and heating and curing to obtain the propeller blade. The preparation method is simple in process and low in cost, the obtained product is high in quality.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, in particular, the invention relates to a method for manufacturing propeller blades. Background technique [0002] In the propeller manufacturing industry, the core material used to manufacture propeller blades is usually polyurethane foam. Polyurethane rigid foam is a high molecular polymer formed by chemical reaction expansion and curing with isocyanate and polyether as the main raw materials, under the action of various additives such as foaming agent, catalyst, and flame retardant. [0003] The traditional manufacturing method of the propeller blade is usually: firstly fill the polyurethane foaming agent into the closed mold, through the chemical reaction, the polyurethane foam expands, fills the cavity in the mold, and produces a special-shaped filling core with the same shape as the propeller; the carbon fiber cloth After the resin laying is completed, the polyurethane foam sandwich...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/70B29L31/08
Inventor 张自国张一鸣
Owner 保定国奥新能源工程材料科技有限责任公司
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