Small-sized axial flow fan shell production method

A manufacturing method and technology of axial flow fans, applied to machines/engines, components of pumping devices for elastic fluids, mechanical equipment, etc., can solve problems such as insufficient strength, high cost, and easy damage, and achieve integrity Good, low cost effect

Inactive Publication Date: 2008-02-20
林贵良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the casings of small axial flow fans are all made of aluminum alloy die-casting, and the cost is high; in order to reduce costs, volume, and weight, the casings are often made very thin. Due to insufficient strength, they are easily damaged during transportation. damage

Method used

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  • Small-sized axial flow fan shell production method

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Effect test

Embodiment 1

[0019] Referring to Fig. 1, a small axial flow fan casing of the present invention is made of cold-rolled steel plate with a thickness of 0.7-1.5mm, and its manufacturing method includes the following steps:

[0020] a. Blanking;

[0021] b. Using a model with a smooth cylindrical wall, the material is stretched into a cylinder 1;

[0022] c. Punching; leave the central end cover 4 and support rod 5 at the bottom of the stretched cylinder, and punch the rest;

[0023] d. Reverse lip and folded edge; carry out reverse lip 7 treatment on the upper mouth of the cylinder body; the periphery of the hole punched at the bottom of the cylinder body 1 and the upper mouth of the cylinder body are folded 6;

[0024] e. Fix the bearing seat 3 by spot welding on the end cover 4;

[0025] f. Drill installation holes 2 on the reverse lip 7 of the barrel mouth, and the installation holes 2 are evenly distributed along the upper mouth;

[0026] g. Finished product after surface coating trea...

Embodiment 2

[0029] Referring to Fig. 2, a small axial flow fan casing of the present invention is made of cold-rolled steel plates with a thickness of 0.5-0.7mm. The manufacturing method is that in step b of Example 1, the smooth cylindrical wall surface of the drawing die is changed to 4-8 concave curved surfaces with "Ω"-shaped cross-sections are evenly distributed along the axial direction of the cylindrical wall, and the material is stretched into a cylinder with this drawing die; Squeeze to make it folded and fit with other cylinder walls of the cylinder to form the reinforcing rib 8 of the cylinder; repeat Example 1 for the rest.

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Abstract

The invention relates to a manufacturing method of a minitype axial fan case, which is used for manufacturing the axial fan case; the fan case is made of cold-rolled steel plate with the thickness of 0.5-1.5 mm, the manufacturing method comprises the following steps: the steel plate is cut and stretched into a cylinder, then the steel plate is punched and flanged at last the edge is folded; a bearing bracket is fixed on an end cover by spot welding and mounting holes are drilled on the flange at the cylinder mouth, then the finished product is manufactured after the surface coating treatment; the devices to realize the proposal comprises: a punch, a press, a welding machine, a drill press and other conventional metal working equipment. The invention substitutes the cold-rolled plate for the existing material of aluminum alloy, the conventional equipment can be used for manufacturing the high-intensity case; as the case is formed by stretching, which has good fastness, and the connection does not fall apart or the case is damaged when in the transportation or use; also the cost is low.

Description

technical field [0001] The invention relates to the technical field of a manufacturing method of an axial-flow fan casing, in particular to the manufacture of a small axial-flow fan casing. Background technique [0002] At present, the casings of small axial flow fans are all die-casted with aluminum alloy materials, and the cost is relatively high; in order to reduce costs, volume and weight, the casings are often made very thin. Due to insufficient strength, they are easily damaged during transportation. damage. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to address the above problems, and to provide a low-cost, high-strength, small-sized axial-flow fan casing manufacturing method, so as to avoid damage to the casing during transportation or use. [0004] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a small axial-flow fan casing is made of cold-rolled steel plates with a thick...

Claims

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Application Information

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IPC IPC(8): F04D29/52
Inventor 林贵良
Owner 林贵良
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