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A thin aluminum alloy climbing ladder and its connection process between the ladder frame and the ladder pedal

A technology of aluminum alloy and aluminum alloy tubes, which is applied in the directions of ladders, sustainable manufacturing/processing, and final product manufacturing, etc., and can solve problems such as complicated surface treatment of weld seams, difficulty in streamlining operations, and bulkiness

Active Publication Date: 2021-07-06
AVANTI WIND SYSTEMS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The welding method has certain requirements on the thickness of the ladder frame and ladder pedals, which are usually thicker. On the one hand, the material cost of the ladder is high and relatively heavy. On the other hand, the requirements on the processing equipment are also high, which increases the production cost. It is difficult to realize streamlined operation, and the production cycle is long
[0003] In addition, in addition to strength requirements, for the wind power industry, ladders used in offshore wind turbine towers also have high corrosion resistance requirements. If welding is used, the surface treatment of welds is also more complicated

Method used

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  • A thin aluminum alloy climbing ladder and its connection process between the ladder frame and the ladder pedal
  • A thin aluminum alloy climbing ladder and its connection process between the ladder frame and the ladder pedal
  • A thin aluminum alloy climbing ladder and its connection process between the ladder frame and the ladder pedal

Examples

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Embodiment 1

[0030] like Figure 1-2 As shown, in a preferred embodiment, the ladder frame and the ladder pedal of the thin aluminum alloy climbing ladder of the present invention are made of an aluminum alloy tube with a wall thickness of 2mm, and the connection process between the ladder frame and the ladder pedal includes the following steps:

[0031] (1) Punch out a plurality of corresponding square through holes 11 with a punching machine on the sides of two ladder frames 1 placed in parallel, as figure 2 Shown in (1), the shape of the square through hole 11 matches the shape and size of the square section through hole 21 of the ladder step 2;

[0032] (2) Insert the two ends of the ladder pedal 2 into the corresponding square through holes 11 of the two ladder frames 1, and expose 10 mm to the outer side of the ladder frame 1, as figure 2 as shown in (2);

[0033] (3) Insert the noses of two expansion compressors into the square cross-section through holes 21 at the two ends of t...

Embodiment 2～12

[0042] The connection process between the ladder frame and the step for the thin aluminum alloy ladder in Examples 2 to 12 is basically the same as that in Example 1, the difference is only in the wall thickness of the aluminum alloy tube, the riveting speed of the eccentric riveting machine and the The riveting time is as follows:

[0043] Example Aluminum alloy tube wall thickness (mm) Riveting speed (r / min) Riveting time (s) Example 2 1.5 650、800、500、600 10、10、10、10 Example 3 2.5 650、800、500、600 10、10、10、10 Example 4 2.0 650 40 Example 5 1.5 650 40 Example 6 2.5 650 40 Example 7 2.0 750、1000、600、700 5、5、5、5 Example 8 1.5 750、1000、600、700 5、5、5、5 Example 9 2.5 750、1000、600、700 5、5、5、5 Example 10 2.0 750 20 Example 11 1.5 750 20 Example 12 2.5 750 20

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Abstract

The invention provides a connection process between the ladder frame and the ladder pedals of a thin aluminum alloy ladder, which connects the ladder frame and the ladder pedals together through the steps of expansion, pressure and riveting. The thin aluminum alloy ladder made by the connection process of the invention is light in weight, high in strength, low in equipment cost, can realize streamlined operation, and has good corrosion resistance, and is especially suitable for being installed in a tower of an offshore wind power generator.

Description

technical field [0001] The invention belongs to the technical field of ladder processing, and in particular relates to a thin aluminum alloy ladder and a connection process between a ladder frame and a step. Background technique [0002] For the climbing ladder, no matter it is aluminum or steel, in order to ensure the strength, the connection between the ladder frame and the ladder pedals used in the prior art is welded. The welding method has certain requirements on the thickness of the ladder frame and ladder pedals, which are usually thicker. On the one hand, the material cost of the ladder is high and relatively heavy. On the other hand, the requirements on the processing equipment are also high, which increases the production cost. It is difficult to realize streamlined operation, and the production cycle is long. [0003] In addition, in addition to strength requirements, for the wind power industry, ladders used in offshore wind turbine towers also have high corrosi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D39/06E06C7/08E06C9/04F03D80/80
CPCB21D39/06E06C7/082E06C7/085E06C9/04F03D80/88Y02E10/72Y02P70/50
Inventor 封俊
Owner AVANTI WIND SYSTEMS INC