50Kv Manual Pneumatic Projection Welding Machine DN40 Steel Gas Cap Resistance Welder

Video Demonstration

Product Overview

This DN40 steel gas cap projection welding machine is a semi-automatic resistance welding solution engineered specifically for fuel tank filling port and gas cap assembly welding. With a rated capacity range of 40-250 KVA and a maximum welding capacity of 6.0+6.0 mm, it delivers precise, repeatable projection welds that meet stringent fuel system sealing requirements. The machine combines pneumatic actuation with an intelligent intermediate frequency controller to ensure consistent weld quality across every production cycle.

Designed for high-volume manufacturing environments, this projection welder integrates energy adaptive control technology and a high-sensitivity workpiece detection system. It automatically compensates for variations in workpiece thickness, while audible and visual alarms immediately signal weld completion for efficient part handling. The rugged, vibration-resistant frame construction with multiple internal reinforcing ribs ensures long-term dimensional stability, making it a reliable choice for zero-defect manufacturing operations in the automotive and metal fabrication industries.

Key Technical Advantages

Rigid Impact-Resistant Frame Structure

The machine body is engineered with high-rigidity construction and multiple internal reinforcing ribs, precisely machined to support each component's installation and load strength. This design minimizes deformation during the welding process, ensuring consistent electrode alignment and stable weld quality while providing a safe, reliable platform for manual operation.

Gas-Liquid Booster Cylinder Pressurization

The upper electrode is pressurized by a gas-liquid booster cylinder with adjustable electrode pressure, achieving high hydraulic output using general air pressure without the need for a separate hydraulic unit. This simplifies the system design, reduces maintenance requirements, and lowers overall operational costs.

Dedicated Gas Storage Tank for Pressure Stability

An integrated gas storage tank minimizes welding pressure fluctuations, ensuring a stable and consistent welding force throughout each cycle. This directly contributes to uniform weld nugget formation and reduced rejection rates, particularly important for fuel system components requiring leak-proof seals.

Advanced Protection and Safety Systems

The equipment includes air pressure and water pressure switches with audible alarms that effectively prevent welding under low water or air supply conditions. This protective feature safeguards equipment integrity and prevents production of defective welds, eliminating the risk of costly rework and downtime.

High-Speed Precision Electrode Pressurization

The combination of an aluminum alloy cylinder barrel, low-damping sealing rings, and a pilot high-flow electromagnetic directional valve delivers exceptionally fast and smooth electrode movement. This design achieves rapid response and sensitive follow-up performance, enabling extremely high spot welding speeds that boost production throughput.

Insulation Protection and Energy-Efficient Welding Power

The secondary circuit adopts pressurized cylinder seat and upper arm insulation, allowing direct installation and welding on the lower seat without short-circuit concerns. The main welding circuit uses a fully water-cooled resistance welding transformer and rectifier, delivering strong output power while maintaining energy efficiency and extending equipment service life.

Applications

Working Principle

Technical Specifications

After-Sales and Support

• Warranty Coverage — 1-year comprehensive warranty covering manufacturing defects in materials and workmanship, with free replacement of defective components.
• Field Installation and Commissioning — Our engineering team provides on-site installation, setup, and commissioning services to ensure your equipment operates at peak performance from day one.
• Operator Training — Comprehensive training for your operators and maintenance staff covering machine operation, routine maintenance procedures, and safety protocols.
• Technical Support — Ongoing video technical support and online assistance for troubleshooting, process optimization, and spare parts supply, ensuring minimal production downtime.

Frequently Asked Questions

What materials can this projection welding machine handle?

This machine is designed for welding alloy metals, aluminum, and stainless steel components. It handles steel gas caps with a maximum welding capacity of 6.0+6.0 mm for the DN(B)-250 model, making it highly versatile for fuel system and general metal fabrication applications.

What is the delivery lead time for this equipment?

Standard delivery typically ranges from 30 to 45 days depending on the specific model and customization requirements. Please contact our sales team with your model selection and configuration needs to receive an accurate delivery schedule.

Can the machine be customized for specific workpiece sizes?

Yes, our factory can customize the machine according to your specific requirements, including electrode configuration, worktable dimensions, and automation integration. Share your workpiece drawings and production specifications, and our engineering team will provide a tailored solution.

What after-sales training and support are provided?

We provide comprehensive after-sales support including free spare parts, field installation, commissioning, and operator training. Additionally, video technical support and online assistance are available throughout the machine's service life to ensure continuous, reliable production.

What power supply options are available for this welding machine?

The standard configuration operates on 3-phase AC 380V power input. Optional voltage configurations include 220V and 440V to accommodate different regional power supply standards. Please specify your local voltage requirements when placing your order.

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