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Custom Zinc Alloy Die Cast CNC Machining Auto Parts
Process
1, ZINC die casting
138T zinc die casting machine; ZA 3# material
Process characteristics
a The furnace temperature is 420°±20°, and the material handle is 14±1 mm.
b. Secondary materials can not be used.
c. Material composition must be tested to ensure it is suitable for production. d. First piece confirmation is required after die-casting.
Precautions:
a. The surface filling quality needs to be confirmed. no bulging, no cold isolation, and no shortage of materials in the column.
b. Pay attention to the surface and avoid mold sticking, mold drawing, or poor ejector pin protrusion.
c. The ejector pin should be concave 0-0.2mm, while for machined surfaces, the ejector pin should be convex 0-0.2mm.
2, Rmove WATER GAP
Tools: Stick / saw machine
Things to note:
a. Pay attention to the surface must not be crushed, lack of material
b. Dimension control.
3, IPQC inspection
Testing instruments: three CMM, appearance visual evaluation, projection, Caliper
Precautions:
Use measuring tools correctly and check dimensions according to drawings.
4, Deburring
Sharp angle position inverted R angle,deburring,non-machining surface top needle draping,grinding and connecting shape.
Equipment: File, Wind mill, 120#sandpaper
Note:
a. No residual segment difference
b. Don't grind over cut
c. Hold the product lightly to prevent pressure injury or deformation.
5, IPQC inspection
Visual inspection of appearance
Equipment: knife-edge ruler, shaping fixture, Rubber hammers, rubber pads
Note:
Visual inspection of appearance, according to SIP
6, CNC（CNC machining+Full material inspection）
Drilling 1x ϕ2.0 through hole (through 2 sides), drilling 3x ϕ3.0 through hole on the side
Equipment : Automatic drilling and tapping machine table, ϕ2.0 drills, CNC Drilling
Note:
a. Do not over-cut or miss processing;
b. Be careful not to scratch or burr the surface;
c. Through-hole tolerance within +/-0.1mm
7, IPQC inspection
Needle Gauge Inspection
Note:
Through-hole need to pass the needle gauge, according to SOP
8, Grinding
Sanding around and on the sides of the product
Equipment :
wind grinder, 120# sandpaper
Note:
No processing should be missed, no sharp corners or burrs should be removed, and the R corners should be connected smoothly.
No processing should be missed, no sharp corners or burrs should be removed, and the R corners should be connected smoothly.
9, IPQC INSPECTION
Visual inspection of appearance
10, oil-spraying (Sherwin-Williams paint)
Note:
a. The surface is smooth, no different color or dirt
b. The surface can not be orange peel, particles.
c. The surface should not be scratched or stripped of paint.
d. Color according to the sample, uniform and consistent
11, IPQC inspection
Note:
a. Surface quality confirmation after oil spraying,
b. Hole need needle gauge sampling inspection
12, Full inspection of appearance + packaging
Equipment : Carton, knife card, clapboard, bubble bag
Note:
a. Appearance according to the sample inspection, the surface is not dirty, scratches, dents bad
b. Each product is put into a bubble bag and put into the packing box.
13, FQC inspection
Test Tools: Calipers, projectors, pin gauges, tooth gauges, visual and packaging inspection
Note:
Whether the measuring tool is within the calibration period.
14, Transportation
Note:
a. Confirm that the quantity matches the order.
b. Label and stamp the outer box.
c. Send reports on shipments.
15, OQC shipping inspection
Testing instruments include calipers, projectors, pin gauges, tooth gauges, outer packaging inspection, etc.
Note:
If the measuring device is still within its calibration window. Whether it meets both customer and SIP requirements.