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High-strength aluminum rivet nut device and machining method thereof

A technology of pressure riveting nuts and processing methods, which is applied in the direction of nuts, positioning devices, manufacturing tools, etc., can solve problems such as safety hazards, connection failures, and unsatisfactory lightweighting, and achieve high connection strength, avoid connection failures, and significantly reduce weight Effect

Pending Publication Date: 2020-10-13
ZHEJIANG HUAYUAN AUTOMOBILE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the rivet nuts are basically processed by carbon steel, and the above-mentioned connections are met through electroplating protection treatment, but even if the steel rivet nuts are treated with surface protection, it is still impossible to avoid potential corrosion when connecting with aluminum sheet metal; in addition, due to steel and aluminum The thermal expansion coefficient is different, and the riveting point of the aluminum plate connected by the steel rivet nut will be affected by the temperature change, which may cause the connection failure and cause safety hazards; at the same time, the steel rivet nut does not meet the lightweight design principle

Method used

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  • High-strength aluminum rivet nut device and machining method thereof
  • High-strength aluminum rivet nut device and machining method thereof
  • High-strength aluminum rivet nut device and machining method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] S1: Select material 2024-T6, the product is M8 riveting nut, the number of structural teeth is 60, and the R angle is 45°;

[0036] S2: Warm heading processing is carried out on a multi-station cold heading machine, the heating temperature of the wire is 250°C, and the warm heading speed is 100 pieces / min. The process includes cutting, shaping, upsetting, heading, positive and negative composite extrusion, punching, etc. , and finally upsetting into a semi-finished blank;

[0037] S3: Tapping on an automatic tapping machine with a processing speed of 60 pieces / minute;

[0038] S4: The surface of the product is cleaned and degreased. Soak the product in the degreasing tank for 15 minutes, then take it out and spin it with a centrifuge at a speed of 1000 rpm for 15 seconds.

[0039] The hardness of the product obtained through the above processing is 130HV, which is used for riveting 5052-H32 aluminum alloy plate, the thickness of the plate is 3mm, the measured anti-rota...

Embodiment 2

[0041] S1: Select material 7075-T6, the product is M10 riveting nut, the number of structural teeth is 45, and the R angle is 60°;

[0042] S2: Warm heading processing is carried out on a multi-station cold heading machine, the heating temperature of the wire is 350°C, and the warm heading speed is 60 pieces / minute. The process includes cutting, shaping, upsetting, heading, positive and negative composite extrusion, punching, etc. , and finally upsetting into a semi-finished blank;

[0043] S3: Tapping on an automatic tapping machine with a processing speed of 50 pieces / minute;

[0044] S4: The surface of the product is cleaned and degreased, and the product is soaked in the degreasing tank for 20 minutes, and then taken out and shaken by a centrifuge at a speed of 1200 rpm for 15 seconds.

[0045] The hardness of the product obtained through the above processing is 175HV, which is used for riveting 6061-T6 aluminum alloy plate, the plate thickness is 3mm, the measured anti-r...

Embodiment 3

[0047] S1: Select material 7A03-T6, the product is M10 riveting nut, the number of structural teeth is 65, and the R angle is 64°;

[0048]S2: Warm heading processing is carried out on a multi-station cold heading machine, the heating temperature of the wire is 320°C, and the warm heading speed is 80 pieces / min. The process includes cutting, shaping, upsetting, heading, front and back composite extrusion, punching, etc. , and finally upsetting into a semi-finished blank;

[0049] S3: Tapping on an automatic tapping machine with a processing speed of 55 pieces / minute;

[0050] S4: The surface of the product is cleaned and degreased, and the product is soaked in the degreasing tank for 18 minutes, then taken out and shaken by a centrifuge at a speed of 1100 rpm for 15 seconds.

[0051] The hardness of the product obtained by the above processing is 165HV, which is used for riveting 6061-T6 aluminum alloy plate, the thickness of the plate is 2.5mm, the measured anti-rotation tor...

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Abstract

The invention discloses a high-strength aluminum rivet nut device and a machining method thereof. According to key points of the technical scheme, the machining method comprises the following steps: 1, a raw material is selected, specifically, a 7-series or 2-series high-strength duralumin alloy in a T6 aging state is selected; 2, warm heading is conducted, specifically, warm-heading machining isconducted on a multi-station cold header, the processes comprise cutting, shaping, flat heading, heading, forward and reverse composite extrusion, punching and the like, warm heading adopts resistancefor heating and enables the temperature of the material to be kept at 200 DEG C-400 DEG C, and the production speed is 50 pieces / min-200 pieces / min; 3, tapping is conducted; and 4, cleaning is conducted for rust prevention. According to the aluminum rivet nut device, the defects during application of a steel rivet nut device to an aluminum plate are avoided in the aspects of potential corrosion,thermal expansion and light weight, and meanwhile the high-strength aluminum alloy is selected so that the requirement for the application strength can be met.

Description

technical field [0001] The invention relates to a high-strength aluminum pressure riveting nut device and a processing method thereof. Background technique [0002] Lightweight is an important trend in the development of the automotive industry. Aluminum alloy materials have the following advantages: strong corrosion resistance, multiple forming methods, high degree of reuse, high strength, low density, and its density is only one-third of steel, the lightweight characteristics of automobiles are better than steel, and good impact resistance. The weight reduction effect is obvious, and it is convenient for processing, manufacturing and maintenance. Therefore, aluminum alloy has become the most widely used lightweight material for automobile lightweight, including aluminum sheet metal, profiles, pipes, etc.; [0003] Aluminum alloys are widely used in automobiles, and there are a large number of steel-aluminum dissimilar material connections and aluminum-aluminum connection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23Q3/06F16B37/06
CPCB23P15/00B23Q3/06F16B37/06
Inventor 李军正吴腾丰刘亚青
Owner ZHEJIANG HUAYUAN AUTOMOBILE PARTS
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