China Factory Suppliers Aluminum CNC Machining Cover for 5G AAU Base Station - Precision Engineering Solution
Process
Aluminum die casting
Equipment: 300T aluminum die casting machine, Material: ADC12
- Furnace temperature: 640°±20°, Material handle: 20±2MM;
- Secondary materials cannot be used;
- Test the material composition to confirm that it is OK and can be produced;
- First piece confirmation is required after die-casting.
- The filling quality of the surface needs to be confirmed. No cold insulation, no bulging, or lack of material for the pillars.
- Pay attention to the surface to avoid sticking molds, drawing molds, or poor ejector pin convexity.
- The ejector pins are concave by 0-0.2mm for non-machine-added surfaces and 0-0.2mm for machine-added surfaces. The thimble needs to be convex 0-0.2mm.
Remove spout (Saw spout and knock out slag bag)
Wooden Stick/sawing machine/labor protection gloves
- Pay attention to the surface without crushing or shortage of materials.
- Control the appearance and size.
IPQC inspection
Caliper, projection, three-dimensional, visual inspection of appearance.
Use measuring tools correctly and check dimensions according to drawings.
SHAPING
Back shaping. Equipment: Cutting edge ruler, shaping tooling
Within 0.2mm of the front plane of the product
IPQC inspection
Visual inspection of appearance
CNC
Machining main Inlet, main Dump Port Face, Backside, Perforated Overbore.
Equipment: CNC machine, flat-bottomed cutter, drill bit, tap processing fixture.
- Do not over-cut or miss processing;
- Be careful not to scratch or burr the surface;
- Ensure the finish of the processed surface is Ra1.6, and the size and shape tolerances.
100% material inspection
Visual inspection of appearance
- The surface of the product should not be overcut, sand holes, lack of material, burrs, and other undesirable phenomena.
- go-no go fixed gauges inspection.
- Test the flatness of the product according to the drawing.
- Hold the product lightly to prevent deformation.
Grinding
The sharp corners of the product are chamfered, deburred, non-machined ejector pins are sharpened, and polished to smooth the appearance.
Equipment: Air grinder, 120# sandpaper
No processing should be missed, no sharp corners or burrs should be removed, and the R corners should be connected smoothly.
IPQC inspection
Visual inspection of appearance
CLEANNING + Chemical conversion membrane + POWER SPRAYING
- No different colors, dirty, not touching and scratching;
- Color according to the sample, uniform and consistent;
- Powder thickness is uniform, no accumulation of tumors, no exposed bottom.
IPQC inspection + Special Characteristics Inspection
Visual inspection of appearance
- Confirm the surface quality after powder spraying;
- The holes need to be randomly inspected with a needle gauge/tested with a tooth hole pass gauge.
Full inspection of appearance + packaging
Carton, knife card, clapboard, bubble bag
- The appearance shall be inspected according to the sample. The surface shall be free of dirt, scratches, dents and defects.
- The tooth pattern must comply with the go – no go fixed gauge inspection;
- The product is placed in the knife card, and then packaged.
FQC inspection
Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection.
Whether the measuring tool is within the calibration period.
Shipping
- Make sure the quantity is the same as order.
- Label and stamp on the outer box.
- Provide a shipping report.
OQC shipping inspection
Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection
Whether the measuring tool is within the calibration period. Whether it is consistent with SIP requirements and customer requirements.
Frequently Asked Questions (FAQ)
A: We use a 300T aluminum die casting machine and ADC12 material. The furnace temperature is strictly maintained at 640°±20° with a material handle of 20±2MM. Secondary materials are strictly prohibited.
A: During CNC machining, we ensure that there is no over-cutting or missed processing. Special care is taken to avoid scratching or burring the surface. The processed surface finish must reach Ra1.6, and all size and shape tolerances must meet specifications.
A: We use precise test tools including calipers, projectors, three-dimensional measurement systems, needle gauges, and tooth gauges. All measuring tools are verified to be within their calibration period, and checks are performed according to drawings and SIP requirements.
A: We ensure there are no color deviations, dirt, or scratches. The color must match the approved sample uniformly, and the powder thickness must be uniform without any paint runs (tumors) or exposed bottom material.
A: Products undergo a full inspection to ensure they are free of dirt, scratches, dents, and defects. Thread patterns are checked with go/no-go gauges. Products are then placed in knife cards and packed using cartons, clapboards, and bubble bags. During shipping, we verify the quantity, apply labels and stamps, and provide a shipping report.