A displacement threshold was used to control DC upset butt welding process, and constant pressure and varied pressure tests were carried out on Q235 a steel strips.
采用位移门槛电压控制焊接过程，对Q 235 - A钢进行了变压式和等压式扁钢带直流电阻对焊试验。
The quality of the circumferential welding in pressure vessels must be paid full attention. This is the key point to guarantee the safety of the pressure vessels in operation.
希压力容器有关工程技术人员要充分重视压力容器环焊缝的质量问题，以确保压力容器的安全使用。
Consequently it is difficult to optimize the welding pressure in pressure constant mode used in conventional ultrasonic plastic welder.
传统焊机的压力不变模式使得焊接工艺很难优化。
This scheme analyzes the automatic welding technology of pressure pipe and abstracts the reasonable process and can provide reference for site welding of pressure...
该方案将压力钢管自动焊技术分解并提炼出了合理的工艺，可为水电站压力钢管的现场焊接提供参考。
This paper deals with the stress layout of the pressure diean important component in the "O" shape reinforcement pressure welding machine.
并对不同厚度的承压模进行了有限元分析，提出了最佳设计方案。
From the mechanical property, medium-pressure electron beam welding is better than that of high-pressure, especially the impact toughness.
从力学性能比较，中压比高压电子束焊接接头力学性能要好，尤其是冲击性能。
The results show that the qualified ratio of medium-pressure electron beam welding is higher than high-pressure electron beam welding in radiographic inspection.
结果表明：射线探伤检验，中压电子束焊接合格率优于高压电子束焊接；
The results show that the qualified ratio of medium-pressure electron beam welding is higher than high-pressure electron beam welding in radiographic inspection.
结果表明：射线探伤检验，中压电子束焊接合格率优于高压电子束焊接；
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