EV cooling plates, motor shafts and terminals require low deformation and leak-free brazing. Ordinary heating creates warpage and welding pores. Rexin flux-free vacuum brazing systems meet IATF16949 standards, supplying reliable thermal solutions for auto component suppliers.

New energy vehicle core components pursue ultra-high precision, zero surface defects and long-term operational stability. Unlike traditional mechanical parts, EV cooling plates, motor transmission components and battery conductive terminals are sensitive to heat treatment temperature difference, residual stress and surface oxidation. Most manufacturers face common batch production failures: micro deformation beyond assembly tolerance, brazing seam pore leakage, surface discoloration leading to poor conductivity, and inconsistent hardness of batch workpieces. Conventional open-type heating furnaces and ordinary quenching equipment cannot control temperature field uniformity and vacuum environment accurately, resulting in high scrap rates and unqualified factory inspection.

As a professional industrial furnace manufacturer with 18 years of customized production experience, Rexin targets the personalized heat treatment pain points of new energy auto parts. We adopt multi-stage gradient heating, flux-free vacuum brazing and protective atmosphere bright annealing core technologies, equipped with independent PID multi-zone temperature control system. All processing technologies comply with IATF16949 automotive industry quality standards, stably control workpiece deformation within 0.03mm, realize zero oxidation and zero decarburization of workpieces, and support 24-hour uninterrupted continuous mass production. Compared with ordinary industrial furnaces, our equipment effectively reduces production scrap rate by over 35% and ensures 100% consistent batch quality for high-end EV parts manufacturing.

1. Aluminum cooling plate brazing pore & long-term liquid leakage Traditional aluminum brazing relies on chemical flux, which easily produces residual dirt and internal welding pores. After long-term high-frequency heat and cold cycle operation, residual flux corrodes welding seams, causing slow leakage and failure of heat exchange components. Rexin exclusive full vacuum flux-free brazing technology operates in a pure vacuum environment of 10⁻³Pa, enabling uniform filling of brazing filler metal in gaps. The formed welding seam is dense and seamless without pores and impurities, achieving permanent 100% airtightness, no secondary cleaning and polishing required.

2. Precision shaft micro deformation & dimensional out-of-tolerance Ordinary quenching equipment has uneven heating speed, resulting in inconsistent internal and external temperature of parts and excessive residual stress, which causes warping deformation of precision motor shafts and transmission parts after processing. We adopt step-type temperature rise and balanced quenching process, slowly releasing internal stress of workpieces, strictly controlling overall deformation within 0.03mm, fully meeting the ultra-tight assembly tolerance requirements of new energy vehicle precision components.

3. Copper terminal oxidation discoloration & reduced conductivity Exposed atmospheric heating leads to copper surface oxidation and blackening, increasing resistance and affecting battery charging and conductive stability. Rexin continuous mesh belt bright annealing furnace adopts high-purity nitrogen/hydrogen mixed protective atmosphere, realizing mirror bright surface treatment of copper terminals, maintaining stable metal conductivity, and avoiding poor electrical contact caused by surface defects.

4. Batch quality inconsistency & unstable yield Most ordinary furnaces have large temperature zone deviation, leading to uneven hardness and inconsistent service life of batch parts. Our multi-zone independent temperature control system keeps furnace temperature uniformity within ±3℃, ensuring consistent mechanical properties of each workpiece in mass production, completely solving batch quality fluctuation problems.

IATF16949 Automotive Certified Process: All heat treatment processes comply with automotive industry audit standards, supporting OEM/ODM batch order inspection and certification, which most ordinary furnace manufacturers cannot provide.

±3℃ Ultra-Precision Constant Temperature Control: Far exceeding the industry conventional ±8℃ temperature deviation standard, ensuring zero difference in mechanical properties of batch precision parts.

Zero Oxidation & Zero Decarburization Vacuum Environment: Full closed protective atmosphere isolation, no surface defect layer, eliminating secondary polishing and cleaning processes, saving 30% post-processing labor cost.

0.03mm Ultra-Low Deformation Control: Customized EV exclusive heat treatment curve, targeted at thin-wall and complex structural parts, solving the industry pain point of easy deformation of new energy parts.

Intelligent Parameter Memory & 24H Continuous Production: One-key storage of mature process parameters for different parts, supporting uninterrupted mass production, stable output and zero quality fluctuation.

The heat treatment process determines the precision, stability and service life of new energy vehicle core components. Ordinary industrial furnaces are difficult to meet the high-standard manufacturing requirements of EV parts due to insufficient temperature control precision and single process. Relying on 18 years of industrial furnace R&D and manufacturing experience, Rexin provides targeted vacuum heat treatment and flux-free brazing one-stop solutions, fundamentally solving production defects such as part deformation, leakage, oxidation and uneven hardness. We support non-standard customized equipment and personalized process debugging, helping global new energy auto parts manufacturers reduce scrap rate, stabilize product quality and improve core market competitiveness.

Encounter EV parts heat treatment deformation, brazing leakage or unqualified batch quality? Contact us for free IATF16949 compliant process optimization solutions & factory direct quotation.

Our Products: Mesh Belt Furnace, Vacuum Furnace, Box Furnace, Pit Nitriding Furnace, Brazing Line, Sintering Furnace

Related Application Industries: Heat Treatment Process, Hardware & Fasteners, Tooling & Cutting Tools, Stainless Steel Strip & Tube, New Energy Auto Parts, Powder Metallurgy, Heat Exchanger, Aluminum Alloy, Bearing Parts