Core and Cavity Processing -Lamp

Precision Machining of Automotive Headlight Mold Cores   Critical Processes for Optical-Quality Surface Finish        1. Material Selection  Key Requirements:   - High-Strength Tool Steel    - Common grades: DIN 1.2344 (H13), 1.2738 (P20+Ni)     - Hardness: 48-52 HRC after heat treatment   - Corrosion Resistance - Essential for humid operating conditions   - Preferred: Stainless variants like NAK80      2. Core Machining Process Flow Step-by-Step Manufacturing:     1. Rough Machining    - 3-axis CNC milling removes 90% material      - Cutting parameters:      - Feed rate: 800-1200 mm/min      - Depth of cut: 2-3 mm      - Leave 0.5mm allowance for finishing     2. Heat Treatment     - Vacuum hardening to 1000-1050°C      - Double tempering at 550-600°C      - Achieve uniform hardness ≤±1 HRC variation     3. Precision Finishing    - 5-axis CNC machining:      - Tolerance: ±0.005mm      - Surface roughness: Ra 0.2-0.4μm      - Critical features:      - Light guide grooves (0.1-0.3mm wi…