A Case Study on Custom Deep Drawing for Automotive Sensor Enclosures

Engineering Precision: A Case Study on Custom Deep Drawing for Automotive Sensor Enclosures

In the automotive electronics industry, protecting sensitive sensors from harsh engine environments is paramount. Cangzhou Deeplink International Supply Chain Co., Ltd. recently completed a high-precision manufacturing project, delivering seamless, airtight deep drawn metal shells for a tier-1 automotive sensor supplier.

This case study highlights how our technical expertise in precision deep drawing and robust quality assurance resolved critical design and scalability issues.

The Challenge: Seamless Protection with Zero Defects

Automotive sensors (such as oxygen and pressure sensors) demand enclosures with exceptional physical properties:

1. Airtight & Seamless Design: Any welded seams present a risk of moisture ingress under high pressure.
2. Micro-Tolerances: Wall thickness consistency is critical; even a 0.02mm deviation can compromise sensor calibration.
3. Material Ductility: Drawing stainless steel 304 to a depth-to-diameter ratio of 3:1 without cracking or wrinkling requires complex multi-station tool design.

The Deeplink Solution: Multi-Stage Deep Drawing Mastery

Leveraging our advanced manufacturing workshop in Nanpi, Hebei—China's hardware capital—Deeplink designed a robust production strategy:

[Blanking] ➔ [1st Draw] ➔ [Redrawing] ➔ [Sizing] ➔ [Piercing/Trimming]

1. Finite Element Analysis (FEA) & DFM

Our engineers simulated the metal flow using FEA software during the Design for Manufacturing (DFM) analysis phase. This allowed us to optimize the drawing radius and blank holder force, eliminating potential tearing zones before physical tooling began.

2. Multi-Station Progressive Deep Drawing

We engineered a 10-station transfer press mold. By gradually reducing the diameter and increasing the depth across ten precise stages, we maintained uniform wall thickness and prevented stress concentration.

3. Integrated Secondary Operations

After the deep drawing process, the shells underwent in-house washing, ultrasonic cleaning, and deburring to ensure a pristine interior surface required for electronic assembly.

Technical Specifications & Performance

Results and Value Delivered

• Cost Reduction: By switching from CNC machining to precision deep drawing, the client saved 35% in material costs and 40% in cycle time.
• Zero Leakage: 100% of the enclosures passed the helium leak detection test, proving the reliability of Deeplink’s seamless manufacturing.
• Rapid Scale-up: Tooling verification was completed in 15 days, allowing mass production to start ahead of schedule.

Why Choose Deeplink for Custom Deep Drawing?

As an ISO 9001 certified deep drawing manufacturer in Hebei, Deeplink combines traditional craftsmanship with 80% automated equipment lines. Whether you need CNC Machining, Laser Cutting, or complex deep-drawn stampings, we provide a reliable, single-source solution.

Looking for high-quality automotive metal parts? Contact Deeplink's engineering team for a free DFM consultation today.