A method for obtaining process parameters of resistance seam welding and a welding method

A technology of resistance seam welding and process parameters, applied in resistance welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as difficulty in obtaining welding process parameters, and achieve the effect of avoiding splashing, avoiding belt breakage accidents, and saving time.

Active Publication Date: 2021-02-05
马钢(合肥)钢铁有限责任公司
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Problems solved by technology

[0005] Aiming at the problem that the existing welding process parameters are difficult to obtain, the present invention provides a method for obtaining resistance seam welding process parameters

Method used

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  • A method for obtaining process parameters of resistance seam welding and a welding method
  • A method for obtaining process parameters of resistance seam welding and a welding method
  • A method for obtaining process parameters of resistance seam welding and a welding method

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Effect test

Embodiment 1

[0035] A welding method, using a narrow lap welder to carry out resistance seam welding on the weldment, the weldment can use various steel materials, such as cold-rolled strip steel, hot-rolled strip steel and galvanized strip steel, etc., in this embodiment, The weldments are made of cold-rolled strip steel.

[0036] Among the process parameters of resistance seam welding, welding current I, electrode pressure F and overlap S have been given. Under this condition, the fastest welding speed can be solved by the following steps:

[0037] Based on the finite element method, a narrow lap resistance seam welding temperature field / stress field calculation module is established. In this embodiment, a narrow lap resistance seam welding temperature field / stress field calculation module is established in the SYSWELD finite element analysis software. The specific steps as follows:

[0038] Step a, according to the size of the cold-rolled strip, the size of the roller electrode and the...

Embodiment 2

[0054] A welding method, using a narrow lap welder to perform resistance seam welding on the weldment. In this embodiment, the narrow lap welder uses a Siemens ML21M narrow lap resistance seam welder, and its welding capacity: welding current I is not greater than 41KA, the electrode pressure F is not greater than 3000N, and the overlap S is not less than 1.0mm; the weldment to be welded is DP780 steel in cold-rolled strip steel, and its thickness δ=2.21mm.

[0055] Resistance seam welding process parameters include welding speed v, welding current I, electrode pressure F and overlap S.

[0056] Among them, the welding speed v determines the heat release time of the weld. When the welding speed v increases, in order to obtain enough heat, the welding current I must be increased; the size of the welding current I determines the penetration rate of the nugget and Overlap amount, when the welding current I exceeds a certain value, continuing to increase the current can only incre...

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Abstract

The invention discloses a method for acquiring process parameters of resistance seam welding and a welding method, and belongs to the field of welding. Among them, the method of obtaining the process parameters of resistance seam welding, the fastest welding speed is determined through the following steps: based on the finite element method, establish a temperature field / stress field calculation module for narrow lap resistance seam welding; Stress field calculation module, given welding current, electrode pressure and overlap amount, extract nugget size and plastic ring size; take nugget size and plastic ring size as constraints to solve the fastest welding speed. The invention obtains the nugget size and plastic ring size as constraint conditions through the narrow lap resistance seam welding temperature field / stress field calculation module, and can solve the fastest welding speed on the premise of ensuring welding quality and avoiding belt breakage accidents. The present invention does not need to pass multiple field tests, which is beneficial to saving time, manpower and material resources.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a method for obtaining technical parameters of resistance seam welding and a welding method. Background technique [0002] Narrow lap resistance seam welding belongs to resistance welding. It uses rotating disc-shaped roller electrodes instead of columnar electrodes. The weldment is assembled into a lap joint and placed between the two roller electrodes. The roller presses the weldment and rotates continuously. Or intermittent power transmission to form a continuous weld resistance welding method. Narrow lap resistance seam welding is the most commonly used welding method in the continuous production line of weldments. This welding method has the advantages of high production efficiency, low cost, and is suitable for automatic production. In order to ensure continuous production, it is necessary to weld the forward steel coil tail and the rear steel coil head of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K11/08B23K11/30B23K11/36
CPCB23K11/08B23K11/3009B23K11/36
Inventor 张武尹孝辉闫敏计遥遥胡磊张军陈满珠王伟峰詹华
Owner 马钢(合肥)钢铁有限责任公司
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