01
Aluminum Die Cast Digital Chassis Back Panel Heat Sink
Process
1, Aluminum die casting
Equipment: 1250T aluminum die casting machine, Material: ADC12
Process characteristics
a. Furnace temperature: 670°±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.
Precautions:
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.
2, Remove spout （Saw spout and knock out slag bag）
Equipment : hydraulic presses
Precautions:
a. Pay attention to the surface without crushing or shortage of materials.
b. Control the appearance and size.
3, IPQC inspection
Test tool: Caliper, projection, three-dimensional, visual inspection of appearance.
Precautions:
Use measuring tools correctly and check dimensions according to drawings.
4, SHAPING
Back shaping
Equipmen : Cutting edge ruler, shaping tooling, hydraulic presses
Precautions:
Within 0.3mm of the front plane of the product
5, IPQC inspection
Visual inspection of appearance
6, CNC
Machining of internal cavity end faces,Backside holes,Side of one end,Hole through-hole
Equipment : CNC machine, flat-bottomed gong tool,Drill Bit, Tap machining jig
Precautions:
a. Do not overcut, missed processing;
b. Surface attention must not be bruised, burrs; and
c. Ensure that the surface finish Ra0.8, size, shape and location tolerances.
7, Air tightness testing
Test pressure value in 20kpa ~ 30kpa, stabilized pressure 20 seconds, test time 10 seconds, leakage control within 0.3kpa
Equipment : Airtight Tooling, Airtightness Test Equipment
Precautions:
a. Do a good job on the product appearance surface protection, sealing groove parts without implementation of touch scratch;
b. Discover the phenomenon of air leakage in time to pick out the marking.
8,100% material inspection
Visual inspection of appearance
Note:
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.
9,Grinding
Chamfering R-angle, deburring, thimble shaving on non-machined surfaces, polishing and smoothing the shape
Equipment: Air grinder, 120# sandpaper
Note:
Do not miss the processing, no sharp corners, burrs removed cleanly, connected to the R angle of the smooth.
10,IPQC inspection:
Visual inspection of appearance
11, cLEANNING + Chemical conversion membrane + POWER SPRAYING
Precautions:
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;
12, IPQC inspection + Special Characteristics Inspection
Visual inspection of appearance
Precautions:
a. Surface quality confirmation after coating;
b. Hole need to needle gauge sampling, go -no go fixed gauges inspection.
13, Riveting and pressing D4.7 dowels
Equipment: Pressure riveting jig, hydraulic press
Note:
a. Check that the pins are loaded without deviation or falling off, and that there is no bulge or pressure injury on the surface of the product;
b. Check the height dimension after pressure riveting.
14, Full inspection of appearance + packaging
Note:
a,The appearance shall be inspected according to the sample. The surface shall be free of dirt, scratches, dents and defects, and the glue dispensing shall be even and without 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.
15, FQC inspection
Test Tools: Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection.
Precautions:
Whether the measuring tool is within the calibration period.
16, Shipping
Precautions:
a. make sure the quantity is the same as order.
b. Label and stamp on the outer box
c. Provide a shipping report.
17, OQC shipping inspection
Test Tools: Caliper, projection, needle gauge, tooth gauge, appearance and outer packaging inspection
Precautions:
Whether the measuring tool is within the calibration period. Whether it is consistent with SIP requirements and customer requirements.