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Resistance spot welding electrode and manufacturing method thereof

A resistance spot welding and electrode technology, applied in resistance welding equipment, electrode features, welding equipment and other directions, can solve problems affecting the connection strength of aluminum alloy plates/steel plates, etc., to improve the connection strength of joints, the preparation method is simple and convenient, and the connection strength is improved. the effect of strength

Active Publication Date: 2016-01-13
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the general resistance spot welding method is used to weld the aluminum alloy plate and the steel plate, hard and brittle intermetallic compounds are easily produced at the joint interface. The intermetallic compound layer is thick and belongs to the brittle zone. It is thin and discontinuous at the outer edge of the solder joint, thus affecting the connection strength of the aluminum alloy plate / steel plate

Method used

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  • Resistance spot welding electrode and manufacturing method thereof
  • Resistance spot welding electrode and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0029] The resistance spot welding electrode of the present embodiment, as figure 1 As shown, including the first conductor and the second conductor 205, the material of the first conductor is red copper, the material of the second conductor 205 is molybdenum, the total height of the resistance spot welding electrode is 20mm, the first conductor upper part 101 is a cylinder, the diameter 20mm, 15mm high, the first conductor lower part 102 is a circular frustum whose diameter gradually decreases from top to bottom, with a height of 5mm, the diameter of the lower end surface 103 of the first conductor is 6mm, and the upper end surface of the first conductor is provided with a cooling groove 104, so The cooling tank body is cylindrical, with a diameter of 10 mm and a height of 10 mm, used to receive the cooling water of the spot welding equipment to cool the spot welding electrodes; the lower end surface 103 of the first conductor is provided with a shape matching the second condu...

Embodiment 2

[0036] The resistance spot welding electrode of the present embodiment comprises a first conductor and a second conductor, the material of the first conductor is chrome bronze, the material of the second conductor is tungsten, the total height of the resistance spot welding electrode is 25mm, and the first conductor top is A cylinder with a diameter of 25mm and a height of 18mm. The lower part of the first conductor is a circular frustum whose diameter gradually decreases from top to bottom, with a height of 7mm. The diameter of the lower end surface of the first conductor is 8mm; the upper end surface of the first conductor is provided with a cooling groove. The cooling tank body is cylindrical, with a diameter of 15mm and a height of 15mm, used to receive the cooling water of the spot welding equipment, and to cool the spot welding electrodes with resistance; the lower end surface of the first conductor is provided with a concave hole matching the shape of the second conductor...

Embodiment 3

[0043] The resistance spot welding electrode of this embodiment includes a first conductor and a second conductor. The material of the first conductor is a mixture of red copper and chromium-zirconium-copper whose mass ratio is copper: chromium-zirconium-copper=1:1. The material of the second conductor is Tungsten, the total height of the resistance spot welding electrode is 22mm, the upper part of the first conductor is a cylinder with a diameter of 22mm and a height of 17mm, the lower part of the first conductor is a circular frustum whose diameter gradually decreases, with a height of 5mm, and the diameter of the lower end surface of the first conductor is 7mm; the upper end surface of the first conductor is provided with a cooling groove, the body of the cooling groove is cylindrical, with a diameter of 13mm and a height of 13mm, and is used to receive the cooling water of the spot welding equipment to cool the spot welding electrodes; The lower end surface is provided with...

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Abstract

The invention relates to a resistance spot welding electrode and a manufacturing method thereof, and belongs to the technical field of resistance spot welding. The resistance spot welding electrode comprises a first conductor and a second conductor. A groove matched with the second conductor in appearance is formed in the lower end face of the first conductor. The second conductor is inlaid in the groove. The lower end face of the second conductor is flush with the lower end face of the first conductor. The electrical resistivity of the second conductor is larger than the electrical resistivity of the first conductor. A cooling groove is formed in the upper end face of the first conductor. When the resistance spot welding electrode is used for welding, the connection strength between metal plates can be improved; the manufacturing method is simple and convenient, and the manufactured resistance spot welding electrode is firm in combination, good in performance and high in strength.

Description

technical field [0001] The invention relates to a resistance spot welding electrode and a preparation method thereof, belonging to the technical field of resistance spot welding. Background technique [0002] In the process of automobile lightweight, aluminum alloy is favored because its density is much lower than that of steel. However, the overall mechanical properties of steel are still better than aluminum alloy materials. Therefore, composite welding of steel plates and aluminum alloy plates is often used, which is It involves welding of dissimilar materials between aluminum alloy plate and steel plate. [0003] Resistance spot welding is a method of applying pressure through electrodes and using current to pass through the contact surface of the joint and the resistance heat generated in the adjacent area to realize the connection. It is the main welding method for modern automobile body welding. However, when the general resistance spot welding method is used to weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/30B23K11/11B23P15/00B23K101/18B23K103/20
CPCB23K11/11B23K11/30B23P15/00
Inventor 邱然锋石红信刘翠然张柯柯李丹王宁贺玉刚戴路李建军
Owner HENAN UNIV OF SCI & TECH
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