焊接技术

   The support leg (or standoff leg) is a critical component on a stud welding gun, particularly on automatic welding guns. Below is a detailed explanation of its function and the best method for adjustment:   I. Functions of the Support Leg The support leg (also referred to in some documentation as the foot assembly or front support leg) has the following primary functions: 1. Positioning the Stud Plunge/Protrusion: The support leg is used to determine the protruding length of the stud end relative to the front face of the welding gun (i.e., the stud plunge/protrusion length). This is a critical parameter affecting weld quality. 2. Ensuring Stud Alignment: The support leg works in conjunction with the chuck and the ferrule (or ceramic arc shield) to ensure the stud is centered in the welding gun, preventing welding defects caused by misalignment or off-center positioning. 3. Stabilizing the Welding Position: During the welding process, the support leg contacts the workpiece surface, ensuring a fixed relative position between the welding gun and the workpiece, thereby preventing gun movement or instability during welding. 4. Protecting the Contact Tip: The support leg is designed such that the end face of the contact tip is recessed approximately 2 mm below the end face of the support leg, effectively protecting the contact tip from damage caused by contact with the workpiece. II. Best Method for Adjusting the Support Leg Step 1: Verify Basic Conditions • The gun piston rod is naturally extended forward under compressed air pressure. • A stud is loaded into the contact tip. • The stud is in its final welding position within the contact tip. Step 2: Adjust the Support Leg Position Core Principle: The support leg must be positioned between the chuck and the stud. It must not be located behind…

Industry Background: The Challenge of Aluminum in Automotive Manufacturing As the automotive industry accelerates toward lightweighting and electrification, aluminum body structures have become the mainstream solution for modern vehicle design. However, this shift introduces significant challenges for traditional joining technologies—especially in stud welding. Aluminum’s high thermal conductivity, rapid oxidation, and unique metallurgical behavior create what engineers often call an “impossible triangle”: achieving high quality, high efficiency, and high stability simultaneously. Conventional DC drawn arc stud welding systems struggle to meet these demands, particularly in Body-in-White (BIW) applications. HEAS Solution: A New Generation of AC/DC Stud Welding Technology To address these challenges, Hongbai Technology has developed the HEAS AC/DC Stud Welding System, a 5th-generation fully digital intelligent solution designed specifically for demanding aluminum welding applications. 1. Multi-Dimensional Energy Control Unlike traditional DC systems, HEAS supports both DC and programmable AC welding modes. Active cathodic cleaning effect efficiently removes oxide layers on aluminum surfaces Adjustable waveform and frequency optimize arc behavior Programmable polarity switching enables better heat distribution This allows precise control of welding energy—not just in magnitude, but also in timing and direction. 2. Intelligent Closed-Loop Process Control HEAS integrates a high-speed control architecture: 100kHz digital current loop for ultra-fast response High-frequency servo motor control for precise lift motion Dynamic arc voltage monitoring and compensation This ensures real-time adjustment of welding parameters, significantly improving process stability and consistency—even under variable conditions. 3. Full Data Traceability & AI Quality Analysis Traditional quality control relies on post-weld inspection. HEAS transforms this into a data-driven process: Full recording of current, voltage, and displacement waveforms Advanced waveform-based quality evaluation AI-driven defect prediction and process optimization Every weld becomes traceable, measurable, and continuously improvable. 4. Designed for Industry 4.0 Integration HEAS is not just a welding machine—it is a smart manufacturing node. Seamless integration with robots…

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,…

电焊设备着火时，应先切断电源，再进行灭火。在切断电源前，不能使用水或泡沫灭火器灭火，否则易导致触电。应使用干粉灭火器、二氧化碳灭火器、四氯化碳灭火器或1211灭火器进行灭火。干粉灭火器不适用于旋转直流焊机的灭火。