China Suppliers Aluminum CNC Machining Cover for 5G AAU Base Station | Quality Factory Production
Process
Aluminum Die Casting
Equipment: 300T aluminum die casting machine
Material: ADC12
- a. Furnace temperature: 640°±20°, Material handle: 20±2MM;
- b. Secondary materials cannot be used;
- c. Test the material composition to confirm that it is OK and can be produced;
- d. First piece confirmation is required after die-casting.
- a. The filling quality of the surface needs to be confirmed. No cold insulation, no bulging, or lack of material for the pillars.
- b. Pay attention to the surface to avoid sticking molds, drawing molds, or poor ejector pin convexity.
- c. 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
- a. Pay attention to the surface without crushing or shortage of materials.
- b. 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
Process: Machining main Inlet, main Dump Port Face, Backside, Perforated Overbore
Equipment: CNC machine, flat-bottomed cutter, drill bit, tap processing fixture.
- a. Do not over-cut or miss processing;
- b. Be careful not to scratch or burr the surface;
- c. Ensure the finish of the processed surface is Ra1.6, and the size and shape tolerances
100% Material Inspection
Visual inspection of appearance
- a. The surface of the product should not be overcut, sand holes, lack of material, burrs, and other undesirable phenomena;
- b. Go-no go fixed gauges inspection;
- c. Test the flatness of the product according to the drawing;
- d. 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
Cleaning + Chemical Conversion Membrane + Powder Spraying
- a. No different colors, dirty, not touching and scratching;
- b. Color according to the sample, uniform and consistent;
- c. Powder thickness is uniform, no accumulation of tumors, no exposed bottom.
IPQC Inspection + Special Characteristics Inspection
Visual inspection of appearance
- a. Confirm the surface quality after powder spraying;
- b. 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
- a. The appearance shall be inspected according to the sample. The surface shall be free of dirt, scratches, dents and defects.
- b. The tooth pattern must comply with the go – no go fixed gauge inspection;
- c. 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
- a. Make sure the quantity is the same as order;
- b. Label and stamp on the outer box;
- c. 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.
What material and equipment are used for the die casting process?
We use ADC12 aluminum material processed with a 300T aluminum die casting machine. To ensure high quality, the furnace temperature is strictly maintained at 640°±20° and secondary materials are strictly prohibited.
How do you ensure the precision of CNC machined parts?
During the CNC machining phase, we utilize specialized fixtures, flat-bottomed cutters, drill bits, and taps. We ensure the finished surface roughness reaches Ra1.6, and strictly inspect all size and shape tolerances.
What precautions are taken during the powder spraying stage?
We ensure there are no color variations, dirt, or scratches on the surface. The color must match the approved sample, the powder thickness must be uniform without any accumulation of tumors, and the raw metal bottom must not be exposed.
What QC inspection steps are performed during production?
We carry out multiple IPQC inspections throughout the process, a 100% material inspection, a final FQC inspection, and a pre-shipment OQC inspection using calibrated calipers, projectors, needle gauges, and tooth gauges.
How are the parts packaged to prevent damage during shipping?
The fully-inspected products are placed securely inside knife cards, separated by protective clapboards, wrapped in bubble bags, and then packed into heavy-duty cartons to guarantee scratch-free and dent-free transit.