Shanghai Haojing Robotics, relying on advanced technology and meticulous service, is committed to project integration and application, flexible manufacturing engineering solutions, and customized welding robot workstations and automated production lines according to your product requirements.Shanghai Haojing Robotics, relying on advanced technology and meticulous service, is committed to project integration and application, flexible manufacturing engineering solutions, and customized welding robot workstations and automated production lines according to your product requirements.
product description
Medium-Frequency Inverter DC Spot Welder, Nut Medium-Frequency Spot Welder Brand: Shanghai Haojing Model: SMD-40 Rated Capacity: 90KVA Maximum Short-Circuit Current: 40KA External Power Supply: 380V/3φ Duty Cycle: 50% Maximum Working Pressure: 12/18KN Electrode Stroke: 80MM Cooling Water Flow Rate: 30L/MIN. Our SMD-40 medium-frequency inverter DC spot welder features fully digital control via a human-machine interface touchscreen for intuitive operation. Performance can be expanded through PC programming. Custom fixture designs accommodate diverse workpiece welding requirements, and automated special-purpose machines can be engineered to enhance production efficiency.
Product Overview:
The SMD-40 series medium-frequency inverter DC spot welder represents the current state-of-the-art in welding equipment. Widely applicable, its welding transformer features compact dimensions with high output energy. By elevating the transformer frequency from standard 50/60Hz mains power to 1000Hz, it significantly reduces core material weight. Additionally, rectifier diodes in the secondary circuit convert AC to DC power for the welder, substantially improving secondary inductance values and saving over 30% in user power consumption.
Our medium-frequency inverter DC spot welders feature fully digital control via a user-friendly touchscreen interface, ensuring intuitive operation. Performance can be expanded through PC programming. Custom fixture designs accommodate diverse workpiece welding requirements, and we develop automated special-purpose machines to enhance production efficiency.

Step into Haojing
China’s professional manufacturer of automation equipment
Haojing Robotics (Shanghai) Co., Ltd., a subsidiary of Shanghai Haojing Electromechanical Co., Ltd., has a registered capital of 5 million RMB. Founded in 1999 and located in Xinbang Town, Songjiang District, Shanghai, Shanghai Haojing Electromechanical Co., Ltd. is a high-tech enterprise integrating the design and production of non-standard robotic automation equipment. Adhering to the development philosophy of “survival through quality, development through reputation, and innovation through technology,” the company is committed to solving customers’ urgent and practical needs with superior technology and service, providing professional automation equipment solutions with high-quality products and innovative design concepts.
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Our 4 major advantages
1.Years of experience in the brand industry
Haojing is a comprehensive enterprise specializing in industrial robot system integration and application. It integrates R&D, manufacturing, sales and service, and has successfully created a series of robot automation projects for many users, providing products and services to many industries and enterprises.



















































