Case Study

EV Battery Housing Machining

EV battery housing CNC machining for sealing flatness and module mounting accuracy.

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Case Overview

Core project data for this machining case.

Industry Automotive EV

Application EV battery housing

Material Aluminum 6061 / 6082

Machine Model HYR VMC1165

Controller Fanuc / Siemens / Mitsubishi

Spindle Speed 12000 rpm

ATC Capacity 24-60 tools

Travel X/Y/Z Project based

Tolerance +/-0.03 mm

Surface Finish Ra 1.6

Cycle Time 49 min

Production Volume 600 pcs/month

Country Poland

Problem

Machining problem to solve

Large thin-wall structureWaterproof sealing surfaceHundreds of mounting holes

Solution

HYR-CNC machining plan

Control sealing surface flatnessImprove hole accuracyReduce welding deformation

Machine Used

Recommended machine configuration

Machine: HYR VMC1165

Spindle: High-speed spindle for stable finishing

ATC: Automatic tool changer for multi-process machining

Controller: Fanuc / Siemens / Mitsubishi options

Coolant: High pressure coolant and chip evacuation

Process

Timeline from raw material to inspection.

01 Weldment Inspection

02 Stress Relief

03 Rough Milling

04 Semi-finishing

05 Sealing Surface Finishing

06 Flatness Inspection

Result

Before and after machining improvement.

Item	Before	After
Flatness	0.15 mm	0.05 mm
Hole Position	0.10 mm	0.03 mm
Scrap Rate	5.2%	0.8%

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