Automotive Electronic Vacuum Pump Housing Machining

Processing challenges

The electronic vacuum pump housing is a critical component of the automotive braking system. Its complex internal cavity structure demands extremely high precision on vacuum sealing surfaces. With thin walls prone to deformation, machining requires precise control of clamping force and cutting parameters. Multi-hole positional accuracy directly impacts assembly and sealing performance.

Solutions

Use dedicated fixtures with CNC machining centers and process in sequence to prevent deformation; vacuum sealing surfaces are precision-ground to a roughness of Ra0.4; all mounting and threaded holes are coordinate-bored to ensure positional accuracy; air-tightness testing is performed after machining to verify vacuum levels meet specifications.

Processed Results

• • Vacuum sealing surface roughness Ra0.4 ensures excellent sealing performance.
• • Uniform shell wall thickness; no machining deformation.
• • Mounting hole position tolerance: ±0.03mm
• • Airtightness test: 100% passed, vacuum level met
• • IATF 16949 Automotive Quality Management System Audit
• • Annual capacity: 50000 units; on-time delivery rate: 99.5%