Precision D2 Tool Steel Fixture Fastening Component: High-Accuracy Milling with Superior Flatness for 3C Assembly Tooling

We successfully manufactured a high-precision D2 tool steel fixture fastening component for a 3C product assembly line tooling application. As an integral part of the assembly fixture system, this component demands exceptional flatness and dimensional stability to maintain precise positioning and consistent assembly quality across millions of production cycles.

Project Overview

Key Technical Highlights

• Superior Flatness Control: Achieved flatness ≤0.008mm on critical mounting surfaces through precision milling combined with surface grinding, ensuring stable and repeatable fixture performance in high-volume 3C assembly operations.
• Process Innovation:
  • Integrated Milling + Grinding Workflow: CNC milling establishes near-net geometry, followed by precision surface grinding to achieve final flatness and surface finish requirements.
  • Heat Treatment Optimization: Controlled heat treatment achieves HRC 58-62 hardness with minimal dimensional change, followed by finish grinding for final geometric accuracy.
  • Low-Stress Fixturing: Custom workholding solutions minimize clamping distortion during both milling and grinding operations.
• Surface Integrity:
  • Precision grinding delivers Ra≤0.8μm surface finish on critical mounting surfaces.
  • High hardness and wear resistance ensure long-term dimensional stability under repetitive assembly loads.

Quality Verification

Each component underwent comprehensive inspection using CMM measurement for flatness (≤0.008mm) and dimensional accuracy (±0.015mm), complemented by hardness testing (HRC 58-62) and surface roughness verification (Ra≤0.8μm).

Industry Applications

This solution demonstrates our expertise in precision tool steel fixture manufacturing for high-volume production environments, ideal for:
✓ 3C product assembly fixtures ✓ Precision positioning jigs ✓ Automated assembly line tooling ✓ High-wear mounting components

Why Partner With Us?

• Proven precision milling + grinding expertise for high-flatness fixture components
• Integrated heat treatment and surface grinding capabilities
• 12+ years of Precision machining experience across 3C and industrial automation sectors