Short-cycle stud welding is widely adopted in thin sheet joining scenarios such as automotive components and home appliance enclosures due to its high welding speed and low heat input. However, when welding 0.7mm thin galvanized sheets, cold welding defects of studs—characterized by incomplete weld fusion and insufficient bonding strength—are prone to occur. These defects not only compromise structural integrity but may also lead to subsequent assembly loosening and seal failure. Combining the characteristics of galvanized sheets and the process principle of short-cycle welding, this paper analyzes the causes of cold welding and proposes targeted solutions for the automotive manufacturing industry. I. Core Causes of Cold Welding: Galvanized Coating Interference & Heat Input Imbalance Short-cycle stud welding achieves metallurgical bonding between studs and base metals through instantaneous arc heating, rapid cooling, and precise heat input control. Yet the properties of the galvanized coating on 0.7mm sheets (melting point at 419℃, boiling point at 907℃, far lower than steel’s 1538℃) and the high thermal conductivity of thin sheets undermine welding stability in two key aspects: 1.Galvanized coating heat absorption and volatilization interference: Under arc heating, the galvanized coating melts and volatilizes prior to the steel sheet, generating zinc vapor. Without proper coating removal or parameter setting, zinc vapor blocks direct contact between the arc and steel sheet, leading to insufficient molten pool temperature and incomplete fusion—i.e., cold welding. Meanwhile, zinc vapor is likely to cause spatter, damaging molten pool continuity. 2.Heat input imbalance: The high thermal conductivity of 0.7mm thin sheets means excessive welding current or extended welding time can easily cause burn-through, while insufficient current or overly short time results in inadequate melting of studs and steel sheets, failing to form an effective fusion layer. Both scenarios trigger cold welding. II. Systematic Solutions: Precise Control of Pretreatment, Parameters and Processes To…

AI Vision Empowers Spot Welding Quality for BIW E‑series Electrode Cap Dress Inspection System by Hongbai Tech In modern intelligent manufacturing, especially on automotive Body-in-White (BIW) welding production lines, resistance spot welding is widely used as an efficient and reliable joining process for high-strength steel, aluminum alloy and other materials. Its welding quality directly determines the safety, durability and structural strength of the entire vehicle. Among the key factors influencing spot welding quality, electrode cap dressing quality is often underestimated yet critical. It determines current conduction efficiency, contact stability, weld nugget size, spatter control and electrode service life. With the deep integration of Industry 4.0 and artificial intelligence, traditional maintenance methods relying on manual visual inspection or fixed-interval replacement can no longer meet the requirements of high-cycle, high-quality and intelligent production. In response, Shenzhen Hongbai Technology Industrial Co., Ltd. has launched the E-series AI Vision Electrode Cap Dress Inspection Sensor System. With high-precision imaging, real-time defect identification and closed-loop feedback, it has become core equipment to ensure the stability of spot welding processes. This paper analyzes the importance of electrode cap dressing, the principles and functions of the AI vision inspection system, and explains how it improves the consistency and reliability of spot welding nuggets by enhancing dressing quality. https://www.hongbaiweld.com/all-product/robot-series/daytime-running-lights2677.html Core Influence of Electrode Cap Dressing Quality on Spot Welding Performance As the key medium for current transmission, the end-face condition of the electrode cap directly affects the physical behavior of welding: Contact Area and Current Density: Pits, copper adhesion, eccentricity and other defects lead to abnormal current density, resulting in insufficient nugget, spatter or burn-through. Thermal Resistance and Heat Dissipation: Contamination or oxide layers increase contact resistance, reduce heat transfer efficiency and accelerate electrode aging. Mechanical Alignment and Pressure Consistency: Out-of-round, inclined or uneven end faces cause uneven force,…

AC/DC stud welding machine is a professional stud welding equipment that outputs both AC and DC welding currents, suitable for stud welding of steel, stainless steel, aluminum, copper alloy and other metals. Inverter Technology: High-frequency inverter (20-50kHz) for efficient energy conversion and low no-load loss. AC/DC Switching: DC mode (for steel, stainless steel studs, stable arc, less spatter); AC mode (for aluminum, magnesium alloy, removes oxide film, reduces pores).

We are pleased to announce that Hongbai Technology’s full range of stud welding machines has successfully obtained CE certificationawarded by TÜV Rheinland, one of the world’s most respected certification bodies. On August 19 2025, the official certificate presentation ceremony was held at our Fenggang, Dongguan facility.This certification confirms that all our standard, customized and intelligent stud welding models fully comply with EU directives and safety standards,granting official market access to the European Union and European Economic Area. As a mandatory EU certification covering safety, health and environmental protection, CE compliance underscores our commitment to product reliability and global standards.For industrial welding equipment, it ensures compliance with key EN standards, enhanced operational safety, stable performance and worldwide recognition. Backed by 22 years of expertise in smart manufacturing, over 100 patents, continuous R&D investment exceeding 15% of annual revenue,and strict quality control in line with the ISO9001 management system, Hongbai Technology delivers robust, high-performance solutions for automotive, aerospace, construction and precision manufacturing industries. This milestone marks only the beginning.We will continue to innovate in intelligent and automated welding technologies, expand our global footprint,and provide customers with reliable, full-lifecycle support worldwide.

With over 20 years in intelligent manufacturing, Shenzhen Hongbai Technology leads in AI-driven welding innovation, recently featured in major Chinese media for its technological breakthroughs. Our globally pioneering AI Large Model Quality Analysis System integrates data, algorithms, and scenarios to cut detection time and boost efficiency. Our high-precision intelligent welding matrix redefines domestic automotive equipment standards. With over 15% of annual revenue invested in R&D, we’ve built a second growth curve in industrial automation and smart homes. Supported by Longgang District’s “Hou Tu Xin Ya” initiative, we’re accelerating global expansion to bring AI welding solutions worldwide, partnering with global manufacturers to advance the industry.                   

Hongbai Technology participated in the 2016 Shenzhen International Intelligent Integration and Robotics Exhibition at Shenzhen Convention and Exhibition Center on March 29, 2016. Exhibition Venue: Shenzhen Convention and Exhibition Center Exhibition Dates: March 29 to April 1, 2016 Our Company Booth Number: Hall 8, Stand 8D62