Welding positioner is a kind of welding positioner which can rotate and tilt the weldment to make the weld on the weldment in a favorable welding position. Welding positioner is mainly used for turnover positioner of non long weldment such as frame, base, flange and head. According to the basic structural form of welding positioner, there are three types: outrigger type, seat type and double seat type.

1、伸臂式变位机的性能特点与使用范围

1. Performance characteristics and application range of outrigger positioner

回转工作台按装在伸臂的一端，伸臂相对于某一倾斜轴成角度回转，而此倾斜轴的位置多是固定，但有的也可小于100度的范围内上下倾斜。

The rotary table is installed at one end of the boom, and the boom rotates at an angle relative to a certain tilt axis, and the position of the tilt axis is mostly fixed, but some can tilt up and down within the range of less than 100 degrees.

适用范围：电动机驱动的，承载能力多在0.5吨左右，适用小型焊件的翻转变位。液压驱动的，承载能力多在10吨左右，适用于结构尺寸不是很大的但自重较大的焊件。它们在焊条电弧焊中应用较多。

Scope of application: motor driven, bearing capacity of about 0.5 tons, suitable for small weldment turnover displacement. Hydraulic drive, the bearing capacity of more than 10 tons, suitable for the structure size is not very big but the weight of the larger weldment. They are widely used in shielded metal arc welding.

2、座式焊接变机性能特点与使用范围

2. Performance characteristics and application scope of seat type welding transformer

工作台连同回转机构支撑在两边的倾斜轴上，工作台以焊速回转，倾斜轴通过扇形齿轮或液压缸，多在110-140度的范围内恒速旋转。

The worktable is supported on inclined shafts on both sides together with rotary mechanism. The worktable rotates at welding speed. The inclined shaft rotates at a constant speed in the range of 110-140 degrees through sector gear or hydraulic cylinder.

适用范围：0.5~50吨的翻转变位，是目前产量大，规格全，应用广的结构形式，常与伸臂式操作机或弧焊机器人配合使用

Scope of application: 0.5 ~ 50 tons of turnover displacement, which is a structure with large output, complete specifications and wide application. It is often used with boom manipulator or arc welding robot

3、双座式焊接变位机性能特点与使用范围

3. Performance characteristics and application scope of double seat welding positioner

工作台在"U"形架上，以所需的焊件回转。该机不仅稳定性好，而且如果设计得当，倾斜运动的重 心将通过或接近倾斜轴线，使倾斜驱动力大大减速小，因此重型变位机多有这种结构。

The worktable is on a "U" shaped frame and rotates with the required weldment. This machine not only has good stability, but also if it is designed properly, the center of gravity of the tilting motion will pass through or close to the tilting axis, so that the tilting driving force will be greatly reduced. Therefore, most heavy positioners have this structure.

适用范围：50T以上的重型大尺寸焊件翻转，多配大型门式焊接操作机，或伸臂式焊接操作机配合使用

Scope of application: heavy and large size weldments over 50t are overturned, which are mostly equipped with large gantry welding operator or outrigger welding operator