Low Temperature Vacuum Brazing Furnace (RVB-L Series)

1.Category: Vacuum Brazing Furnace-Low Temperature Vacuum Brazing Furnace

2.Max Temperature: 700℃

3.Ultimate Vacuum Degree: 4*10^-3 Pa

4.Application: welding of aluminum, copper, and their alloys; welding of other materials that cannot withstand high temperatures; welding between materials with significantly different coefficients of thermal expansion.

Introduction:

 Vacuum brazing is a process in which a filler metal with a lower melting point than the base metals is used to form a strong bond between workpieces by capillary action through microscopic gaps under vacuum heating conditions. Vacuum brazing furnaces are widely used in industries such as electronics, chemical processing, petroleum, medical equipment, tool manufacturing, and automotive manufacturing. Low-temperature vacuum brazing is mainly applied to the welding of aluminum products such as plate-fin heat exchangers, automotive radiators, automotive air conditioning evaporators, condensers, radar network antennas, and waveguides, as well as other scenarios requiring high precision and protection of material properties.

Main advantage: 

1.Excellent weld quality and high strength: In a vacuum environment, the brazing filler flows smoothly, and the joint strength can approach that of the base material, meeting the demanding requirements of high-pressure and sealed applications.

2.Minimal deformation and high precision: Uniform heating and cooling, combined with well-designed fixtures, significantly reduce deformation caused by thermal stress. This is especially suitable for brazing complex structural components while ensuring welding accuracy.

3.Environmentally friendly and safe: No flux is required, eliminating harmful fumes from flux evaporation and reducing the need for post-weld cleaning, thereby lowering environmental costs.

4.Flameless vacuum environment for safer operation: The absence of open flames in a vacuum setting enhances safety, particularly beneficial for safety management in mass production.

5.Wide applicability and strong compatibility: Capable of processing various aluminum alloys (such as 6061, 3003, etc.) and complex structural parts, including irregular aluminum joints and aluminum-to-other-metal (e.g., copper, with special processes) brazing, meeting customized needs across industries.

6.High production efficiency and consistency: Multiple workpieces can be loaded at once (depending on furnace size), enabling batch production. Stable process parameters ensure consistent product quality within the same batch, reduce rework rates, and support large-scale industrial manufacturing.

Related Configuration

1.Heating Chamber

Heating chamber: Square

Heating element: Nickel-chrome belt

Heating chamber is composed with stainless steel frame, insulation layer, heating element, insulator and supporter. Heating temperature can customized, max working temp can reach at 700℃, and the temperature uniformity is excellent.

2.Vacuum system

Well-known domestic and foreign vacuum pump brands, such as EVP, Leybold, etc., are matched according to customer needs.

3.Control system

The equipment’s PLC and electrical components utilize a SIEMENS S7-1200 programmable controller, capable of detecting and issuing alarms for any anomalies during operation, enabling fully automated control.

The temperature controller is an internationally renowned Eurotherm temperature controller. Its control accuracy reaches ±0.5‰ F.S. It offers a wide range of functions, including no fewer than 20 (expandable) temperature/time settings, intelligent PID control, and automatic switching of heating control channels.

All low-voltage components are Siemens, and terminals are from international brands such as Phoenix Contact. Their quality, performance, and workmanship are highly reliable, minimizing control system failure rates.

Technical Parameter：

After-Sales and Acceptance Services

After the completion of production, the manufacturing plant will conduct  factory acceptance test, including:

1.Ultimate vacuum test

2.Pressure rise rate test

3.Inspection of the completeness of all equipment systems

After the equipment is delivered to the user’s site, site acceptance test will be carried out, including:

1.Overall installation

2.Overall debugging

3.User training

4.Document handover

Warranty

The warranty period is one year from the date of final acceptance. It covers non-human-damaged components (excluding consumables/wear parts), as well as manual maintenance services and transportation costs incurred during the warranty period.