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A stud welding method and device using resistance and arc composite heat source

A composite heat source and welding method technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of welding large-diameter studs and thick metal substrates, reducing workpiece performance, and insufficient joint toughness, etc., to achieve The effect of improving welding quality, eliminating thermal stress and reducing welding residual stress

Active Publication Date: 2015-09-02
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them: induction and arc composite heat source stud welding can use induction heating device to coordinate pre-weld preheating, welding, and post-weld annealing to reduce the degree of restraint and prevent cold cracks, but the welding interface is easy to generate a large area The intermetallic compound, the joint toughness is not enough, and it is also prone to defects such as necking, flash, poor fusion, welding deviation, etc., just like arc stud welding.
Induction and friction combined heat source stud welding is a welding method that uses induction heating to heat the workpiece to reduce the required frictional heat generation. The problem of insufficient heat production during the column, but due to the large area of ​​induction heating, the heat-affected zone is large, which reduces the performance of the workpiece itself
Friction and friction composite heat source is a method that uses the outer ring for friction preheating and the inner ring for stud friction welding. This method solves the problem of single friction stud welding system when welding studs while retaining the advantages of solid phase welded joints. The problem of insufficient heat production, but the device is complex and the utilization rate of heat source is low
Resistance and friction composite heat source is a method that uses resistance heat and friction heat to heat joints to achieve welding. Although this method can reduce friction pressure and spindle power, this method cannot solve the problem of large-diameter studs and thick metal substrates. welding

Method used

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  • A stud welding method and device using resistance and arc composite heat source
  • A stud welding method and device using resistance and arc composite heat source
  • A stud welding method and device using resistance and arc composite heat source

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1, take the welded joint finished product of LY12 metal stud of Φ6mm and 16Mn steel plate with plate thickness of 3mm as an example:

[0031] Step 1, resistor preheating: Press the pretreated metal stud (1) and the metal substrate (2) under the pressure of 10MPa, turn on the resistor power supply (4), control the current to 500A, and the effect of the resistor heat Preheat the metal stud (1) and the metal substrate (2), and the preheating time is 0.5s; among them, the resistance power supply (4) is a digital inverter resistance welding welding power supply, and the metal stud (1) is connected to the resistance power supply (4 ), the metal substrate (2) is connected to the cathode of the resistance power supply (4);

[0032] Step 2, Vibration and homogenization of arc strike burrs: heat the metal stud (1) and metal substrate (2) preheated in step 1 to 300°C through resistance, so that the metal stud (1) is in contact with the metal substrate (2) The part is e...

Embodiment 2

[0037] Embodiment 2, taking the welded joint finished product of Q235 metal stud of Φ18mm and 6061 aluminum alloy plate with plate thickness of 40mm as an example:

[0038] Step 1, resistor preheating: compress the pretreated metal stud (1) and metal substrate (2) under the condition of a pressure of 50MPa, turn on the resistor power supply (4), and control the current to 1000A. Preheat the metal stud (1) and the metal substrate (2), and the preheating time is 3s; among them, the resistance power supply (4) is a digital inverter resistance welding welding power supply, and the metal stud (1) is connected to the resistance power supply (4) The anode of the metal substrate (2) is connected to the cathode of the resistance power supply (4);

[0039] Step 2, Vibration and homogenization of arc ignition burrs: heat the metal stud (1) and metal substrate (2) preheated in step 1 to 500°C through resistance, so that the metal stud (1) is in contact with the metal substrate (2) The pa...

Embodiment 3

[0044] Embodiment 3, taking the welded joint finished products of Q235 metal studs of Φ30mm and Q235 plates with a thickness of 80mm as an example:

[0045] Step 1, resistor preheating: compress the pretreated metal stud (1) and metal substrate (2) under the condition of a pressure of 80MPa, turn on the resistor power supply (4), and control the current to 1500A. Preheat the metal stud (1) and the metal substrate (2), and the preheating time is 4s; among them, the resistance power supply (4) is a digital inverter resistance welding welding power supply, and the metal stud (1) is connected to the resistance power supply (4) The anode of the metal substrate (2) is connected to the cathode of the resistance power supply (4);

[0046] Step 2, Vibration and homogenization of arc strike burrs: Heat the metal stud (1) and metal substrate (2) preheated in step 1 to 600°C through resistance, so that the metal stud (1) is in contact with the metal substrate (2) The part is evenly heate...

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Abstract

The invention relates to a method and a device for welding studs by applying a resistor-electric arc composite heat source. According to the method and the device disclosed by the invention, the welded joint finished product with excellent performances, of metal studs and a metal substrate is prepared by the steps of preheating the metal studs and the metal substrate through a resistor, homogenizing arc-striking burrs by vibration, controlling a resistor-type power supply in a time-delay manner, uniformly heating the end surfaces of the metal studs, thermally compensating metallurgical bonding and performing heat treatment after welding. The method and the device disclosed by the invention are capable of realizing welding between the metal studs with medium and large diameters and a thick and large metal plate, suitable for welding between the metal studs made from steel, nickel, copper, titanium, aluminium and magnesium, and the substrate made from the same or different metal materials, and especially suitable for welding for steel metal studs with large diameters and high carbon equivalents.

Description

technical field [0001] The invention relates to a stud welding method, in particular to a stud welding method and device using a combined resistance and arc heat source. Background technique [0002] Stud welding refers to a method of welding studs or similar metal posts and other fasteners to metal substrates. As a simple, high-speed, low-consumption, and low-pollution advanced welding technology, stud welding is widely used in the fields of vehicles, shipbuilding, boilers, steel structures, construction, electronics, instruments, and medical equipment. According to the heat source classification of stud welding, stud welding can be divided into welding methods such as resistance welding, friction welding, explosive welding and arc welding. According to the classification of stud welding power source, arc stud welding can be divided into stable arc stud welding (arc stud welding), unstable arc stud welding (capacitor discharge stud welding or capacitor energy storage stud ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K28/00
CPCB23K28/02
Inventor 周琦张惠芸王克鸿杨立张德库彭勇赵江涛陶娟孙宏宇蔡雅君
Owner NANJING UNIV OF SCI & TECH
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