SU671953A1

SU671953A1 - Resistance butt welding method

Info

Publication number: SU671953A1
Application number: SU762390184A
Authority: SU
Inventors: Анатолий Михайлович Лебедев; Николай Арсеньевич Синадский; Виктор Анатольевич Гронский
Priority date: 1976-07-09
Filing date: 1976-07-09
Publication date: 1979-07-05

Description

(54) СПОСОВ КОНТАКТНОЙ СТЫКОВОЙ СВАРКИ(54) SPOTS OF CONTACT BUTT WELDING

К бТ:гнъвеййи торцов заготовок и увеличивают при их разведении в зависимости от наличи или отсутстви сварочного тока. При этом слой металла, расплавленного на торцах изделий, образуют или сварочным током при подаче изделий на уменьшенной скорости в процессе оплавлени или путем индукционного нагрева током высокой частоты. Дл стабилизации толщины сло расплавленного металла на торцах изделий процесс оплавлени начинают через заданный промежуток времени после нагрева, а заканчивают после оплавлени изделий на заданную линейную величину. Физический смысл предлагаемого способа сварки состоит в том, что процесс прерывистого подогрева провод т при повышенном электрическом сопротивлений сварочного контакта. Создание сло жидкого и nfeperpiBToro металла значительно повышает сопротивление контакта, а следовательно, эффективность нагрева изделий в процессе сварки. Чтоейл сохранить слой жидкого металла на торцах изделий, процесс подогрева йедут при переменном усилии подачи. Это усилие уменьшают при сближении изделий автоматически в зависимости ох наличи или отсутстви сварочного тока. Дл разведени свариваемых изделий после их соприкосновени усилие необходимо увеличить, причем оно должно преодолеть запипание нагретых торцовых поверхностей.To BT: gnomeyi and ends of the workpieces and increase with their dilution, depending on the presence or absence of welding current. In this case, a layer of metal melted at the ends of the products is formed either by welding current when the products are fed at a reduced speed during the melting process or by induction heating with a high-frequency current. In order to stabilize the thickness of the molten metal layer at the ends of the products, the reflow process begins after a specified period of time after heating, and ends after the products are melted to a given linear value. The physical meaning of the proposed welding method is that the process of intermittent heating is carried out with an increased electrical resistance of the welding contact. Creating a layer of liquid and nfeperpiBToro metal significantly increases the contact resistance and, therefore, the efficiency of heating products in the welding process. With the sheet retaining a layer of liquid metal at the ends of the products, the process of heating is at a variable feed force. This force is reduced when the products come together automatically, depending on the presence or absence of welding current. In order to dilute the products to be welded, after their contact, the force must be increased, and it must overcome the sticking of heated end surfaces.

Claims

1. A method of butt welding by intermittent heating of products with a welding current, at which periodically energized ones are brought together prior to contact between their ends and diluted with subsequent continuous melting and slump, characterized in that, in order to increase productivity by intensifying the heating before starting intermittent heating over the entire surface of the ends of the welded blanks create a layer of molten metal of a given size, and in the process of intermittent heating, reduce the feed force when the ends of the workpiece are in contact and increase it when they are diluted depending on the presence or absence of welding current.

2 .. Method according to n.i, from. This is due to the fact that the layer of molten metal at the ends of the products is created by welding current when the products are fed at a reduced speed.

3. The method according to claim 1, characterized in that the layers of the molten metal at the ends of the products are created by induction heating with a high frequency current.

Sources of information taken into account in the examination

1, Kochanovsky N.Ya. Machines for resistance welding. Gosnergoizdat, MgL., 1954, p.88, pp.4-13.

2. The same, p.95, figure 4-20.