1060 deep-drawing aluminum sheets, known for excellent ductility and cost-effectiveness, may encounter several common issues during application. Below is a detailed analysis of these problems, along with key influencing factors, and the core advantages of choosing Zhongfu Aluminum’s 1060 deep-drawing aluminum sheets.
I. Common Problems & Root Causes
1. Earing Issue
During deep drawing, asymmetric deformation at the aluminum sheet edge can form ears (local protrusions). This defect is closely related to three core factors:
Aluminum sheet texture: Grain orientation directly determines the direction of ear formation.
Cold working rate: A high cold working rate or improper annealing often leads to 45° ears.
Annealing temperature: Low cold working rate or specific annealing conditions may cause 0° and 90° ears.
2. Cracking Risk
Despite 1060 aluminum’s good ductility, cracking may occur during complex deep-drawing or bending processes due to stress concentration, triggered by:
Unreasonable mold design (e.g., sharp corners, insufficient fillet radius).
Excessive stamping speed that fails to allow uniform material deformation.
Low normal anisotropy index (R value), which weakens thinning resistance and increases cracking probability in flanging, hemming, and other high-stress processes.
3. Surface Quality Defects
Fibrous Stripes: 1060 aluminum sheets produced via the cast-rolling process may develop surface fibrous stripes after deep drawing, caused by grain orientation. This defect directly impacts the aesthetic appearance of finished parts.
Aluminum Chip Accumulation: The low hardness of 1060 aluminum leads to easy chip generation from friction with molds during stamping. Timely cleaning is critical—unremoved chips will reduce production efficiency and damage part surface quality.
Oxide Layer Peeling: The natural oxide layer on the aluminum sheet surface may peel off during processing, adhering to mold surfaces. This not only accelerates mold wear but also causes contamination of finished parts.
4. Springback Problem
Aluminum has a low elastic modulus (approximately 1/3 that of steel), resulting in significant springback after deep drawing. This makes dimensional accuracy control of parts difficult:
Cup-shaped or box-shaped stamped parts often have shape deviations.
Compensation measures are required, such as reserving springback allowance in mold design or optimizing stamping parameters.
5. Mold Wear and Maintenance Challenges
Aluminum chips have strong adhesion and easily accumulate on mold surfaces, accelerating wear and reducing mold service life.Molds require high-precision processing and special surface treatments (e.g., chrome plating, PVD coating) to minimize friction. Without these treatments, poor part forming and frequent mold repairs will occur.
6. Work Hardening
1060 aluminum sheets are prone to work hardening during cold processing, which increases the difficulty of subsequent deep-drawing operations. Delayed intermediate or final annealing will degrade the material’s deep-drawing performance and lead to defective parts.
7. Dimensional Accuracy Deviation
Environmental factors: Temperature and humidity fluctuations during storage or transportation can cause aluminum sheet deformation, leading to installation dimensional errors.
Process factors: Insufficient mold precision or unstable stamping parameters (e.g., uneven pressure, inconsistent speed) also result in dimensional deviations of finished parts.
II. Key Solutions to Mitigate Problems
Strictly control production processes: Optimize annealing systems and cold working rates to ensure stable material performance.
Optimize mold design: Increase fillet radii, adopt smooth surface treatments, and match stamping parameters to material deformation characteristics.
Strengthen mold maintenance: Regularly clean mold surfaces and reapply anti-wear coatings.
Ensure proper storage and transportation: Store aluminum sheets in a dry, temperature-controlled environment to avoid deformation.
Ⅲ. Reasons for Choosing Zhongfu Aluminum 1060 Deep-Drawing Aluminum Sheets
1. Rigorous Quality Assurance
We strictly comply with international standards (ASTM, JIS, GB) and implement full-process quality control—from high-purity raw material procurement to finished product inspection. Each batch of 1060 deep-drawing aluminum sheets undergoes strict testing for texture uniformity, R value stability, and surface quality, ensuring consistent performance and reducing defect rates during customer processing.
2. Professional Technical Support
Our experienced R&D team provides customized solutions based on customer application scenarios, including:
Material selection guidance and temper customization (e.g., O temper for optimal deep drawing).
Process optimization advice (e.g., mold design parameters, stamping speed recommendations).
On-site technical support to help customers resolve cracking, springback, and other on-site problems, reducing scrap rates.
3. Stable Production Capacity & Inventory
With an annual output of 100,000 tons, we maintain sufficient inventory of 1060 deep-drawing aluminum sheets in common specifications (thickness: 0.5–5mm; width: 1000–2000mm). We can quickly respond to emergency orders and guarantee on-time delivery, ensuring supply chain stability for customers.
4. Factory-Direct Pricing Advantage
As a source manufacturer, we eliminate intermediate distributor markups and adopt a transparent pricing system. Customers can reduce procurement costs by 5–15% compared to purchasing from trading companies, while enjoying high-quality products and direct after-sales service.
5. Flexible Customization & One-Stop Service
We support customized production to meet special requirements for thickness, width, surface finish, and temper. Our one-stop service covers pre-sales consultation, order customization, production scheduling, international logistics (sea/air/land transport), and after-sales tracking, making cooperation efficient and worry-free.
6. Proven Global Reputation & Credibility
We serve over 100 distributors and 3,000+ end customers worldwide, exporting products to more than 30 countries and regions (including the USA, EU, Southeast Asia, and the Middle East). With a customer repurchase rate of over 85%, we have won wide market recognition through honest operation and reliable services. We hold ISO9001, SGS, and BV certifications, ensuring product compliance with global market standards.
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