How welding affects actuator duarability
Release time：
2026-04-29 09:20
Source：
Welding is never just combine two pieces together, the whole welding process should include preheating , welding and PWHT.
Hydraulic rotary Actuators bear considerable loads during operation, and these loads are ultimately concentrated on the shaft. Therefore, the toughness of the shaft must meet the standard, and the welding of the shaft and the right end cover is the key to maintaining the overall strength.
The key point is — welding preheating is definitely not as simple as "casual heating". In traditional processes, air fuel torch is still widely used for preheating, but when this comes to preheat a shaft with over 10 cm diameter, this will not meet the requirement of performance. We abandon empiricism, our process follows experimental conclusions, combined with theoretical analysis and practical operations, we choose to use furnace to accurately control the preheating temperature and time, this slows our cycle time but allows the preheating effect to penetrate into the interior of the shaft, fundamentally reduce welding residual stress and avoid cold cracks.
A good start ensures better process and results, and uniform preheating with help of welding robot guarantees stable, consistent interpass temperature, thereby reducing the impact of HAZ.
Compared with the visible appearance, those hidden, invisible process details are even more important to determine the durability and long-term stable operation of an actuator.
Other developments
The company owns five series of products, including 10,20, 30, 40 ,50,60, with thirty categories and two hundred of sub-categories.
CONTACT US
Contact: Liu Jiayu
Address: No. 186-2, Hexing Road, Yangting Town, Huancui District, Weihai City, Shandong Province