What is the percentage l...

Aluminum alloy die-casting parts are approximately 60%-70% lighter than cast iron of the same volume. The commonly used ADC12 and A380 die-casting aluminum alloys have a density of 2.68-2.8g/cm³, while gray cast iron has a density of 7.2-7.4g/cm³ and ductile cast iron has a density of 7.0-7.2g/cm³. The weight difference ratio can be calculated based on the density difference, and the ratio may slightly fluctuate depending on the material grade.

What is the anti-corrosi...

The mainstream surface anti-corrosion processes for aluminum die-casting rear frames of electric bicycles include anodizing, electrostatic spraying, cathodic electrophoresis, and chemical passivation. Composite processes (passivation + spraying) are widely used. These processes are tailored to meet different needs. Anodizing provides wear resistance, spraying offers diverse appearances, and electrophoresis has strong adhesion. All of these processes meet industry anti-corrosion standards and ens

What is the dynamic load...

The safe use of lithium batteries for electric bicycles requires adherence to charging specifications, avoidance of harsh environments and excessive charging and discharging. The core of maintenance lies in regularly checking the state of the battery cells and the insulation of the wiring. Batteries that comply with the GB 31241 standard, when used in accordance with specifications, can reduce the risk of swelling and fire, extend their service life by 2-3 years, and are compatible with most mai

What are the advantages ...

Compared to steel wheels, aluminum alloy wheels have core advantages in terms of lightweight, superior heat dissipation, diverse designs, strong corrosion resistance, and high precision. They can reduce vehicle energy consumption, extend brake life, adapt to complex road conditions, and meet aesthetic demands. Although the cost is slightly higher, their comprehensive use value aligns more closely with modern vehicle design concepts.

What is the effect of ul...

Ultra-low speed die casting reduces gas entrapment and shrinkage cavities through laminar flow filling, resulting in a 30%-50% improvement in the dimensional accuracy of automotive chassis die castings. The general tolerance reaches CT6-CT7, with key dimensions at ±0.05mm, and superior form and position tolerances, significantly enhancing dimensional stability.

What are the dimensional...

The dimensional accuracy acceptance of deburring removal for automotive chassis die-casting parts is based on QC/T 273 and GB/T 15114, with burrs on non machined surfaces ≤ 0.1mm, holes ≤ 0.3mm, and tolerances CT7-CT9. Professional testing is required to ensure that assembly and safety are not affected.

What are the repair proc...

The repair processes for damaged aluminum die-casting shells of communication products include argon arc welding, brazing, bonding, cold welding, etc. These processes need to be selected based on the size, location, and precision requirements of the damage, taking into account both structural strength and appearance, to ensure the protective function of the shell and the stability of communication performance.

What are the options for...

The surface treatment processes for ice box aluminum alloy castings mainly include anodizing, spraying, passivation, electrophoretic coating, and chemical conversion coating. Anodizing enhances hardness and wear resistance, spraying enhances weather resistance, passivation achieves basic corrosion resistance, electrophoretic coating is uniform, suitable for scenarios such as food contact and outdoor use, balancing performance and appearance requirements.

What is the surface roug...

The surface roughness of die-casting parts is influenced by alloy type and process parameters. For zinc alloy, new molds can achieve a roughness of Ra0.63μm, while for aluminum alloy, the typical range is 1.6-6.3μm, and for copper alloy, it can be as low as 0.4μm. After surface treatment, the roughness can be improved to 0.15-0.25μm. It is necessary to control mold wear and process parameters, and adhere to standards such as GB/T 11353.

What type of material is...

The insulating coating on the inner wall of motor casings commonly utilizes four types of materials: epoxy resin, polyester resin, silicone resin, and modified composite resin. Epoxy resin is suitable for medium and low voltage motors, polyester resin offers high cost-effectiveness, silicone resin has excellent temperature resistance, and modified composite resin possesses multiple properties. The appropriate type needs to be selected based on the operating conditions of the motor.