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Processing Technology

Raw material selection → Mechanical processing → Surface treatment → Assembly → Inspection → Finished product delivery

1、Drawing Stage

  1. Source: Design drawings provided by the customer, or product drawings completed by the company’s R&D and design department.
  2. Content: Including part structural dimensions, tolerance requirements, material selection, machining process requirements, surface treatment specifications, etc.
  3. Function: Serve as the core basis for the entire production process, ensuring that subsequent steps are carried out according to the design intent.

2、Selection of Raw Materials

Before production, enterprises need to select appropriate materials based on product design and customer requirements.

  1. Conventional metal materials: carbon steel (45c), stainless steel (SUS304, SUS316), brass (H59), Hastelloy (C276), etc., with wide applications.
  2. Non-ferrous metal alloys: die-cast aluminum alloy (ADC12), zinc alloy (ZA27), gravity casting, low-pressure casting aluminum alloy, precision casting, suitable for complex structural parts and lightweight requirements.
  3. Cast iron types: FC150, FC200, FCD400, etc., used for high-strength, wear-resistant parts.
  4. Special materials: precision cast parts and powder metallurgy products, meeting high-precision or special performance requirements.

3、Machining Stage

According to the product structure, various machining processes are adopted:

CNC lathe: High-precision rotary part machining.

Machining center: Suitable for one-time multi-process machining of complex structural parts.

Laser cutting: Efficiently cuts sheet materials with high precision and a small heat-affected zone.

Wire cutting: Used for high-precision mold part processing.

Sheet metal stamping: stamping and forming thin sheet metal, suitable for mass production, commonly used for enclosures, brackets, and other structural parts.

4、Surface Treatment Stage

Post-process the parts to improve appearance and performance:

  1. Electroplating: Enhances corrosion resistance and aesthetics.
  2. Baking paint and powder coating: surface protection and decoration, commonly used for exterior parts.
  3. Oxidation: Aluminum parts undergo anodizing to increase hardness and corrosion resistance.
  4. Plastic dipping: enhances insulation and protective properties.
  5. Degreasing: Remove surface oil and grease to ensure the effectiveness of subsequent treatments.
  6. Blackening: Black oxide treatment is a commonly used chemical surface treatment method. Its principle is to create a layer of oxide film on the metal surface to isolate it from air and achieve rust prevention.

5、Assembly Inspection Stage

 Assembly stage

  1. Assemble processed and surface-treated parts to form a complete machine or modular component.
  2. Tolerance matching must be strictly controlled to ensure assembly accuracy.

Inspection Stage

  1. Dimensional inspection: calipers, coordinate measuring machine (CMM).
  2. Performance inspection: hardness, strength, corrosion resistance testing, etc.
  3. Appearance inspection: manual visual inspection or machine vision.

6、Finished Product Delivery Stage

  1. Product packaging, warehousing, and preparation for shipment.
  2.  Inspection reports and certificates of conformity can be provided according to customer requirements.
  3.  After the finished product is delivered to the customer, after-sales service and quality tracking can also be provided.

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Qingdao Damingzhou Precision Technology Co., Ltd. was established in 2008 as a wholly foreign-owned enterprise. It specializes in the precision processing of various metal materials, providing one-stop services from receiving customer drawings to the completion of surface treatment. The company can meet requirements for various processes, such as non-ferrous metals, die casting, precision casting, low-pressure casting, gravity casting, special-shaped materials, and more.

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