1、Core advantage: Why choose CNC machining?

  High precision: The tolerance can reach ± 0.01mm, ensuring precise fit between the lock body and internal electronic components.

  Complex Structure: Supports multi axis machining and can handle complex features such as irregular holes, curved surface, grooves, etc.

  Material diversity: Suitable for metals (aluminum alloy, stainless steel) or high-strength engineering plastics (POM, nylon).

  Small batch flexibility: No need for molds, suitable for prototype validation or customized production.

2、Key design

  Structure Design

  Waterproof and dustproof: It must comply with IP67/IP68 standards and be designed with sealing grooves (installed with silicone rings) and labyrinth structures.

  Heat dissipation requirements: Reserve ventilation holes or integrate heat sinks (especially metal shells).

  Assembly interface: Accurately locate screw holes and buckle structures to avoid assembly interference.

  Wall thickness control: metal is recommended to be ≥ 1.5mm, plastic is recommended to be ≥ 2mm, balancing strength and lightweight.

  Function integration

Sensor openings: Accurate openings are required in areas such as fingerprint recognition, cameras, and touch screens.

Antenna signal optimization: To avoid signal shielding by metal casing, plastic or window design can be used locally.

3、Material selection

  6061 aluminum alloy lightweight, easy to process, anodizable coloring high-end household/commercial locks.

4、Machining Process

  3D modeling and simulation

Use SolidWorks or Fusion 360 for structural design, simulating assembly and stress distribution.

Key points: Split the shell into upper and lower covers, optimize the position of the parting line to reduce the difficulty of CNC machining.

  Process planning

Process sequence: rough machining (removing excess) → semi precision machining → precision machining → threading/chamfering.

Fixture design: Using vacuum suction or customized fixtures to avoid deformation of thin-walled parts.

  Surface Treatment

Metal casing: sandblasting+anodizing (optional matte/glossy finish)

Plastic shell: UV coating (scratch resistant), coating (metallic texture).

5、Cost optimization strategy

  Design optimization

Reduce deep holes and narrow grooves.

Unified screw hole diameter to reduce the number of tool changes.

  Mass production

Small batch (50-100 pieces): CNC direct machining.

Large batch (>1000 pieces): CNC prototype production → injection molding (reduces single piece cost).