Comprehensive Guide to Wire Harness Manufacturing: 8 Key Steps from Stranding to Finished Product

Step 1: Wire Cutting
Precisely cut electrical stranded wires to specified lengths using engineered drawings. This stage employs specialized cutting equipment to ensure ±1mm length accuracy and clean-cut ends, forming the foundation for subsequent processes.

Step 2: Braiding
Utilize braiding machines to organize cut wires into bundled harnesses. Strict adherence to core wire arrangement protocols ensures tidy appearance and optimal layout, preventing performance-impairing tangles while enhancing mechanical strength and visual appeal.

Step 3: Injection Molding
Insert assembled harnesses into molding machines for high-temperature/high-pressure encapsulation with protective plastic. This significantly improves mechanical robustness while adding waterproof, dustproof, and wear-resistant properties to extend service life.

Step 4: Insulation Stripping
Employ pneumatic strippers to remove insulation from termination points per SOP requirements. Stripping dimensions maintain ±1mm tolerance relative to wire gauge, preventing conductor damage to ensure reliable terminal connections.

Step 5: Terminal Crimping
Join stripped conductors to connector terminals using precision crimping machines. Real-time monitoring verifies critical parameters including terminal deformation, crimp height/width, and pull-off values against quality standards.

Step 6: Housing Assembly
Align crimped terminal locks with housing grooves, inserting until audible engagement clicks. Gentle pull-testing confirms proper seating while preventing functional failures from misalignment.

Step 7: Continuity Testing
Conduct comprehensive testing for shorts, opens, miswires, contact issues, and insulation defects using automated testers. Only harnesses passing all electrical validation proceed to final packaging.

Step 8: Packaging & Storage
Apply standardized packaging with sealing machines and strapping equipment, ensuring flush seals and taut bundling. Systematic organization by batch/specification facilitates traceability and inventory management.