Electromagnetic rivetter

A technology of electromagnetic riveting and electromagnetic riveting gun, which is applied in the field of riveting of difficult-to-form materials and large-diameter rivets, can solve the problems of reducing connection efficiency, increasing structural weight, and low efficiency, so as to improve engineering practicability, improve riveting quality, To avoid the effect of voltage drop

Inactive Publication Date: 2003-05-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This riveting method is inefficient and expensive
In order to avoid the difficulties encountered when riveting large-diameter rivets, sometimes screw connections have to be used instead of riveting in the design, which increases the structural weight and reduces the connection efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Electromagnetic riveting equipment is mainly composed of power supply system, riveting gun and top iron. The implementation process is described in detail below.

[0024] The power supply system uses 4 pulse capacitors with a rated voltage of 4000V and a rated capacity of 400 microfarads. The control system is mainly composed of two parts: analog control part and PLC operation loop control. The analog control mainly includes charging voltage control, thyristor trigger control and protection part. The charging voltage is controlled by the PI control method of the voltage loop to realize the real-time supplement of the voltage and avoid the voltage drop of the capacitor caused by the working current of the Hall sensor. Charging control includes two parts: voltage real-time measurement and voltage comparison. When the voltage of the measured capacitor is lower than the set voltage, the charging signal is input to the thyristor to continue charging; when the voltage reach...

Embodiment 2

[0032] Electromagnetic riveting equipment is mainly composed of power supply system, riveting gun and top iron. The implementation process is described in detail below.

[0033]The power supply system uses 6 pulse capacitors with a rated voltage of 4000V and a rated capacity of 400 microfarads. The control system is mainly composed of two parts: analog control part and PLC operation loop control. The analog control mainly includes charging voltage control, thyristor trigger control and protection part. The charging voltage is controlled by the PI control method of the voltage loop to realize the real-time supplement of the voltage and avoid the voltage drop of the capacitor caused by the working current of the Hall sensor. Charging control includes two parts: voltage real-time measurement and voltage comparison. When the voltage of the measured capacitor is lower than the set voltage, the charging signal is input to the thyristor to continue charging; when the voltage reache...

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PUM

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Abstract

An electromagnetic rivetter features that several 3-5 KV pulse capacitors are parallelly connected in its power supply system, the programmable controller and real-time digital display of voltage are used in its operating circuit, the overcurrent, overvoltage, overcharge and leakage monitor and protection are added to its control system and Its riveting hitter has dual damping layers. Its advantages are high capacitor capacity, low riveting voltage and loading rate, low recoil and noise, low cost and high riveting quality.

Description

(1) Technical field: [0001] The electromagnetic riveting equipment involved in the present invention is mainly used for riveting rivets of various materials in aviation, aerospace, automobile and bridge engineering, and is suitable for riveting rivets of difficult-to-form materials and large-diameter rivets. (two) background technology: [0002] In the manufacture of aviation and aerospace engineering products, a large number of rivets of various materials need to be riveted. Traditional riveting methods are: [0003] The hammer riveting method using compressed air as the power source is more commonly used. However, this riveting method produces large recoil and noise, poor working conditions, and workers are prone to fatigue. The quality of riveting is affected by human factors, and the recoil generated when riveting large-diameter rivets is difficult for workers to bear. [0004] The pressure riveting method with hydraulic pressure as the power source. The static pressu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J15/24B21J15/38
CPCB21J15/24
Inventor 曹增强佘公藩盛熙夏力农沈德辅陶华李志尧
Owner NORTHWESTERN POLYTECHNICAL UNIV
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