The correct selection specification of the welding positioner is an important guarantee to prevent weld penetration and avoid the phenomenon of incomplete penetration. Inaccurate specifications can also cause pores.
The penetration of 3mm dial automatic welding is very close to the limit of non-penetration. When the penetration depth n1<1.5mm, there will be no penetration. When n1<2.0, it is very easy to penetrate, and the range of penetration depth is <1mm. Therefore, welding specifications are strictly restricted.
Several specifications of φ1.6 welding wire are represented by current: main welding seam current I1=160A, 180A, 200A; back cover welding current I2=220A, 240A, 260A, 280A. For a specification, since the main weld and the weld penetration of the back cover do not cross, in fact, the normal penetration cannot be guaranteed. The two types of specifications must produce weld penetration.
Since the 3mm sheet zidognh adopts a small specification, the required stability must be high, otherwise it will cause weld penetration or incomplete penetration, weld formation will also deteriorate, and defects such as pores may occur. We require the current fluctuation range to be controlled within ±10A, and the voltage to be controlled within ±2V, so that satisfactory results can be obtained.
The welding positioner involves the user’s concept of equipment and equipment, as well as the consideration of different uses for handle welding and automatic welding. When selecting and designing a welding positioner, in addition to the freedom of the main deformation, it is also necessary to consider adding auxiliary changes. Degree of freedom. For example, welding of large parts can increase the degree of freedom of lifting motion, such as the above-mentioned products in the United States and Germany.
In addition, for some weldments, due to the simple distribution of welds, one degree of freedom of rotation can solve the ship welding requirements of most and important welds in the weldment. However, flat fillet welding can be implemented. In this way, in order to simplify the equipment cost, the process will consider the use of a single-degree-of-freedom or functionally degraded welding positioner, that is, a single-turn positioner. According to the requirements of use, the auxiliary degree of freedom can also be increased. For example, lift type and tailstock movable type, etc.
There are also some position positioners, which are suitable for the process requirements of welding stations. Some degrees of freedom of this welding positioner have nothing to do with welding. Also, from the consideration of station design and stability, two or Multiple welding positioners are merged and designed, so there are a variety of station transformations and combined multi-degree-of-freedom welding positioners.