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Stainless steel welding machine how to avoid the welding deformation problems?
by：ZORON Machinery
2021-01-29
As a new material of stainless steel material, its own has the characteristic such as corrosion resistance, formability, in the aerospace, automotive accessories, and other fields has been widely applied.
In the application of stainless steel and welding occupy very important position, especially in the auto industry, body all adopt welding mode connection.
However, influenced by many factors, stainless steel plate welding deformation problems, and control is difficult, is not conducive to the sustainable development in related field.
Therefore, to strengthen the research of stainless steel plate welding deformation is of great significance.
welding machine mainly refers to the use of melting and connecting the workpiece can be used as heat source of a welding method. During the welding process, exposure to the surface of welding material, and its effect, part of the reflection, the rest is absorbed, enter the material, the welding. In short, the welding process is the use of the optical system of high power beam after focusing, exposure to the surface of welding material, and then make full use of the materials of light energy absorption for heating treatment after cooling to form a melting welding joint welding process. Normally, the welding is mainly divided into two categories, thermal conductivity and deep penetration welding.
a particular harm, the welding deformation and the main factors influencing the welding deformation:
the main factors influencing the welding deformation of welding current, pulse width and frequency. The welding current is added, the weld width also will increase, gradually appear the phenomenon such as splash, lead to deformation of weld surface oxidation, accompanied by rough feeling; Pulse width increases, increase strength of welded joint, when the pulse width to a certain extent, the material on the surface of the heat transfer energy consumption also will increase, make the liquid evaporation from the molten pool spatter, lead to solder joint sectional area is smaller, affect the joint strength; Welding frequency to the influence of the stainless steel plate welding deformation is closely related to the thickness of the steel plate, etc, such as for 0. 5 mm stainless steel plate, when the frequency to 2 hz, weld overlap rate is higher; And when the frequency reaches 5 hz, weld burning is serious, with wider range of heat affected zone, deformation. Thus, it is imperative to strengthen the effective control of welding deformation.
2, some effective measures to prevent welding deformation:
in order to reduce welding deformation problems, improve the quality of stainless steel plate welding, can from the welding process parameters were optimized, specific operation method is as follows:
01, active introduction of orthogonal experiment method
the orthogonal experimental method is mainly refers to a schedule by orthogonal table analysis and multi-factor test method of mathematical statistics. Able to take advantage of less test to obtain effective results, and deduce the implementation plan. , the thorough analysis at the same time, also can to obtain more information, provide the basis for the specific work. Generally choose the welding current, pulse width and frequency as investigation object, such as welding deformation is regarded as index, and adhere to the principle of reasonable, to control the factors level appropriate range. As for the thickness of 0. 5 mm stainless steel plate, the current can be controlled between 80 ~ 96 I/A. Frequency of 2 ~ 5 f/Hz, etc.
02, selection of orthogonal table
normally, experimental factor level number should be consistent with the horizontal orthogonal table, the number of factors should be less than the number of columns in the orthogonal table, the reasonable design of orthogonal table can provide support and assistance for subsequent research.
03 to poor test results analysis
through the thickness of 0. 5 mm stainless steel plate test result, poor each column are not equal, and prove that each factor has particularity, different level is different, the effects of impact on the welding deformation of current, pulse width and frequency, considering various factors, the welding process parameters should be current control 85 a, pulse width of 7 ms, frequency of 3 hz, the welding process parameters are controlled in three numerical can guarantee the thickness of 0. 5 mm stainless steel plate welding deformation is small.
for stainless steel plate thickness of 0. 8 mm stainless steel plate, on the basis of meet the weld tensile strength hours, to ensure that the deformation should be current, pulse width and frequency control respectively in 124 a, 8 parameters, such as ms, 4 hz. And the thickness of 1 mm stainless steel plate 160 a, 11 ms respectively, 5 hz. In the welding process, welding personnel to control the parameters within a reasonable range, can not only improve the welding quality and efficiency, and to avoid the deformation of steel plate, meet the production requirements. Along with the rapid development of science and technology, technology is developing to control deformation, such as the finite element simulation application in the welding deformation control, by using welding temperature and stress to avoid welding deformation problems, improve stress balance of stainless steel plate, in avoiding the steel plate welding deformation at the same time, also can improve the quality of welding, so as to promote the healthy development of the related areas.
4, conclusion:
according to the mentioned above, an effective welding technology, welding technology as playing a positive role in improving welding quality. However, influenced by factors such as current, stainless steel plate welding problems such as deformation. , welding personnel can adopt orthogonal experiment method for different thickness steel plate process parameters, combined with the parameters of welding work, continuously improve the quality of welding, to avoid deformation of steel plate.
we want more welding machine price, welcome to inquire, hotline:
welding machine mainly refers to the use of melting and connecting the workpiece can be used as heat source of a welding method. During the welding process, exposure to the surface of welding material, and its effect, part of the reflection, the rest is absorbed, enter the material, the welding. In short, the welding process is the use of the optical system of high power beam after focusing, exposure to the surface of welding material, and then make full use of the materials of light energy absorption for heating treatment after cooling to form a melting welding joint welding process. Normally, the welding is mainly divided into two categories, thermal conductivity and deep penetration welding.
a particular harm, the welding deformation and the main factors influencing the welding deformation:
the main factors influencing the welding deformation of welding current, pulse width and frequency. The welding current is added, the weld width also will increase, gradually appear the phenomenon such as splash, lead to deformation of weld surface oxidation, accompanied by rough feeling; Pulse width increases, increase strength of welded joint, when the pulse width to a certain extent, the material on the surface of the heat transfer energy consumption also will increase, make the liquid evaporation from the molten pool spatter, lead to solder joint sectional area is smaller, affect the joint strength; Welding frequency to the influence of the stainless steel plate welding deformation is closely related to the thickness of the steel plate, etc, such as for 0. 5 mm stainless steel plate, when the frequency to 2 hz, weld overlap rate is higher; And when the frequency reaches 5 hz, weld burning is serious, with wider range of heat affected zone, deformation. Thus, it is imperative to strengthen the effective control of welding deformation.
2, some effective measures to prevent welding deformation:
in order to reduce welding deformation problems, improve the quality of stainless steel plate welding, can from the welding process parameters were optimized, specific operation method is as follows:
01, active introduction of orthogonal experiment method
the orthogonal experimental method is mainly refers to a schedule by orthogonal table analysis and multi-factor test method of mathematical statistics. Able to take advantage of less test to obtain effective results, and deduce the implementation plan. , the thorough analysis at the same time, also can to obtain more information, provide the basis for the specific work. Generally choose the welding current, pulse width and frequency as investigation object, such as welding deformation is regarded as index, and adhere to the principle of reasonable, to control the factors level appropriate range. As for the thickness of 0. 5 mm stainless steel plate, the current can be controlled between 80 ~ 96 I/A. Frequency of 2 ~ 5 f/Hz, etc.
02, selection of orthogonal table
normally, experimental factor level number should be consistent with the horizontal orthogonal table, the number of factors should be less than the number of columns in the orthogonal table, the reasonable design of orthogonal table can provide support and assistance for subsequent research.
03 to poor test results analysis
through the thickness of 0. 5 mm stainless steel plate test result, poor each column are not equal, and prove that each factor has particularity, different level is different, the effects of impact on the welding deformation of current, pulse width and frequency, considering various factors, the welding process parameters should be current control 85 a, pulse width of 7 ms, frequency of 3 hz, the welding process parameters are controlled in three numerical can guarantee the thickness of 0. 5 mm stainless steel plate welding deformation is small.
for stainless steel plate thickness of 0. 8 mm stainless steel plate, on the basis of meet the weld tensile strength hours, to ensure that the deformation should be current, pulse width and frequency control respectively in 124 a, 8 parameters, such as ms, 4 hz. And the thickness of 1 mm stainless steel plate 160 a, 11 ms respectively, 5 hz. In the welding process, welding personnel to control the parameters within a reasonable range, can not only improve the welding quality and efficiency, and to avoid the deformation of steel plate, meet the production requirements. Along with the rapid development of science and technology, technology is developing to control deformation, such as the finite element simulation application in the welding deformation control, by using welding temperature and stress to avoid welding deformation problems, improve stress balance of stainless steel plate, in avoiding the steel plate welding deformation at the same time, also can improve the quality of welding, so as to promote the healthy development of the related areas.
4, conclusion:
according to the mentioned above, an effective welding technology, welding technology as playing a positive role in improving welding quality. However, influenced by factors such as current, stainless steel plate welding problems such as deformation. , welding personnel can adopt orthogonal experiment method for different thickness steel plate process parameters, combined with the parameters of welding work, continuously improve the quality of welding, to avoid deformation of steel plate.
we want more welding machine price, welcome to inquire, hotline:
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