A Method for Recognition of Spot Spatter in Resistance Spot Welding
A technology of resistance spot welding and identification method, which is applied in the direction of resistance welding equipment, welding equipment, metal processing equipment, etc., and can solve problems such as reducing mechanical properties, deteriorating the operating environment, and increasing labor intensity
Active Publication Date: 2021-09-03
天津七所高科技有限公司
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Problems solved by technology
[0004] In view of this, the present invention aims to propose a method for identifying spatter of solder joints in resistance spot welding, so as to solve the problem that the spatter generated in the process of resistance spot welding has a great influence on the quality of parts, which will reduce the amount of core liquid metal and reduce the Mechanical properties, it takes a lot of manpower to polish the surface of the splash, which increases the labor intensity, and the splash will also worsen the problem of the operating environment
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[0053] It should be noted that the features in the present invention in the present invention can be combined with each other in the case of an unable conflict.
[0054] In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "post", "left", "right", " The orientation of the orientation of the orientation of the direction "," horizontal "," top "," bottom "," inside "," outside ", etc. is based on the orientation or positional relationship shown in the drawings, is only for convenience of describing the present invention and Simplify the description, rather than indicating or implying that the device or element must have a specific orientation, constructed and operated in a particular direction, and thus is not to be construed as limiting the invention. Moreover, the terms "first", "second", etc. are only used to describe purposes, and cannot be understood as an indication or implies rela...
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The invention provides a method for identifying spatter of solder joints in resistance spot welding, comprising the following steps: S1. The acquisition system collects the current and voltage on the secondary side of the welding tongs during the welding process, and obtains array data I(n) and array data V respectively (n); S2. Obtain the array data R1(n) according to Ohm's law; S3. Set a time window with a length of t1; S4. Calculate the standard deviation of R1(n) in the time window by moving the time window to obtain a Standard deviation array σ1(m); S5, preprocess the standard deviation σ1(m) array to get σ2(n); S6, normalize σ2(n) to get σ3(n) array; S7, calculate σ3( n) Arithmetic mean value μ of the array; S8, comparing the 3 times the mean value μ with the threshold value 1 to identify whether there is splashing or not, and the quantitative index of the splashing. According to the present invention, the dynamic resistance is calculated by collecting the current and voltage in the welding process, and the method described in the invention can be used for the dynamic resistance to identify the qualitative index of whether spatter occurs in the solder joint and give the quantitative index of the severity of the spatter .
Description
Technical field [0001] The present invention belongs to the field of welding technology, and more particularly to a method of identifying a solder joint splash in a resistance spot welding. Background technique [0002] Resistance spot welding is between two different material or the same material of the same material, and is between the upper and lower electrodes, and the electrical resistance heat generated by the current flow through the working contact surface and the adjacent region. It processes a method of forming metal binding to melting or plastic. Because of its simple operation, low welding cost, good labor conditions, high productivity, widely used in aerospace, electronic, automotive, household appliances and other industries. [0003] The splash generated during the resistance spot welding has a great impact on the quality of the parts. It will reduce the amount of core liquid metal, reducing mechanical properties, grinding the surface of the splash surface, has inc...
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IPC IPC(8): B23K11/11B23K11/36
CPCB23K11/11B23K11/36
Inventor 路向琨徐昊翟宝亮尉学森陈洪杰
Owner 天津七所高科技有限公司