كيفية إزالة الخدوش من الألومنيوم: تلميع الألومنيوم

What is the Aluminium Surface Polishing Process?

The aluminium surface polishing process is a technique that uses mechanical or chemical methods to treat the surface of aluminium alloys or materials, enhancing their smoothness, flatness, and aesthetic appearance. The polishing process can remove the oxide layer, scratches, and imperfections from the aluminium surface, while making it smooth and mirror-like, achieving a mirror finish or the desired level of gloss. The process not only provides a decorative effect but also enhances the corrosion resistance and wear resistance of the aluminium components.

The main aluminium surface polishing processes at Conco include mechanical polishing, chemical polishing, and anodising polishing. Let’s explore the aluminium surface polishing techniques in this article.

Preliminary Preparation for Aluminium Surface Polishing

Aluminium surface polishing is a complex process that involves multiple steps and details to ensure the smoothness and aesthetic appeal of the final result. To ensure the polishing process runs smoothly and achieves the desired outcome, preliminary preparations are crucial. Below are the key points for the initial preparation of aluminium surface polishing:

Set the Polishing Plan

Based on the specific conditions of the aluminium components, we will pre-define each step of the polishing process, including the grit size of the sandpaper for each stage, the selection of polishing agents, and the machine speeds. This ensures a smooth polishing process and avoids frequent interruptions and adjustments during operation.

Conco also conducts product sampling first and only proceeds with mass production once the sample is confirmed to be correct. Similarly, the sample products will serve as the standard for inspection, ensuring uniformity across all products.

Material Preparation

Before starting the polishing process, it is essential to prepare the required materials. The quality and selection of these materials directly impact the polishing results.

1. Aluminium Alloy Components: Ensure that the surface of the aluminium components to be polished is free from significant defects or contamination. For components with noticeable flaws, preliminary correction must be carried out before polishing.
2. Polishing Agents: Select the appropriate polishing paste, polishing liquid, or metal polishing compound based on the specific polishing requirements. There are various types of polishing agents, some suitable for coarse polishing, while others are designed for fine polishing or mirror finishes.
3. Polishing Tools: Prepare the appropriate tools for polishing aluminium surfaces. Commonly used tools include sandpaper, polishing wheels, wool wheels, and cloth wheels. Different tools are suited for various grit polishing agents and help achieve different levels of gloss.

Equipment Inspection

Selecting and adjusting the appropriate polishing equipment is a key step to ensure the smooth progress of the work. The main equipment includes:

1. Polishing Machine: Check the power supply and operational status of the polishing machine or angle grinder to ensure the equipment is functioning properly. For larger aluminium components, a polishing machine is typically used; for detailed areas or smaller aluminium parts, an angle grinder can be employed.
2. Abrasives: Check the wear condition of sandpaper, polishing wheels, and wool wheels to ensure they are not damaged or excessively worn. Ensure that the size and material of the tools are compatible with the aluminium components.

Safety Protection

As aluminium surface polishing involves mechanical processing and the use of chemicals, it is essential for workers to take appropriate safety precautions:

1. Protective Glasses: Wear protective glasses or goggles to prevent aluminium particles or polishing agents from splashing into the eyes, ensuring eye safety.
2. Protective Gloves: Wear suitable protective gloves to prevent hand injuries and avoid contaminating the aluminium surface with oils or dirt from the hands.
3. Earplugs or Earmuffs: The noise generated by polishing machines and angle grinders can be quite loud, and prolonged exposure may damage hearing. Therefore, earplugs or earmuffs should be worn.
4. Dust Mask: Metal dust generated during operation can sometimes affect the respiratory system. Wearing a dust mask can effectively prevent the inhalation of harmful particles.

Check the Polishing Materials and Tools

Ensure that all the materials and tools required for polishing are properly prepared. The specific checks include:

• Grit of Sandpaper and Polishing Wheels: Select the appropriate grit size of sandpaper and polishing wheels based on the actual condition of the aluminium components. Coarse-grit sandpaper is suitable for initial polishing, while fine-grit sandpaper and polishing wheels are used for finer polishing and mirror finishing.

The table below lists the selection of polishing sandpapers：

ملاحظة:
Sandpapers with smaller grit sizes (e.g. 40#) are suitable for removing larger defects and surface imperfections, while sandpapers with larger grit sizes (e.g. above 2000#) are used for fine sanding and enhancing surface gloss.

The table below provides a brief overview of the selection of polishing wheels.

• Types and Condition of Polishing Agents: Different types of polishing agents are suitable for various aluminium alloys and polishing stages. Ensure that the polishing agents are not degraded and select them according to production requirements.
• Condition of Tools: Check the condition of the wheels and tools on the polishing machine, angle grinder, and other equipment to ensure they are intact, avoiding any impact on work quality due to damaged tools.

Summary of Aluminium Polishing

Aluminium polishing is a crucial surface treatment process that not only enhances the appearance, gloss, and feel of aluminium, but also improves its corrosion resistance and wear resistance. The entire polishing process involves multiple steps and details, ranging from initial preparation to the actual operation and final inspection. Each stage plays an important role in achieving the desired finished result.