The lighting die casting manufacturer explains the appearance inspection standard of die casting.
The casting surface is bright, no sand, no cold, no porosity, no needle eye, no wrinkle, no crack. 2.3 the non-processed surface has no obvious pockmarks and no bulging. The pit depth is greater than 1mm and less than 5mm, and the area is larger than 10mm2, and the hole depth is greater than 5mm and the area is greater than 20mm2. 2.4 the pit mark on the machining surface is greater than 1/2 of the machining allowance and the area larger than 10 mm2 shall be filled. 2.5 lifting heavy arm, lifting heavy ears and touching steel wire rope parts, all of which make lubrication fillets.
3. Test of casting data composition and function index: see the casting specification.
4. Defective product type 4.1 scrap: forged by the forging factory. One of the following questions is for waste: shape, table, shoulder, etc. The outer appearance of the casting or the processing appearance of severe sand, sand, sand,
Unable to clean, affect the processing. Peep hole, the device installation site is serious pack sand, cannot clean. The castings with severe cold insulation, crack, lack of casting, shrinkage, and severe impact strength are not correct or unqualified, and their functions are reduced. There are hard points, which cannot be machined. Other forging defects that cannot be saved. 4.2 repair products: the forging factory sends people to repair the casting. No shot blasting and annealing treatment. (2) increase box and other adding machine work load. 3) the small or different heart, lifting and turning screw holes can not be used normally. 4.3 return supplies: the molds manufacturer shall use the casting for repair and make a claim to the forging manufacturer. 1) shape, platform, shoulder and other leakage casting but can be repaired. Sand, sand, sand, but can be cleared. It presents a mild cold septum, a crack, a lack of casting and a shrinkage, which does not affect the strength after repair. The shape scale fault, after repair does not affect the strength. The gate is not only smooth, but also has a convex and concave mark. The lifting arm, lifting heavy ears and touching the wire rope parts are not lubricated, and have no rounded corners. They don't make the inside and outside. The machining allowance exceeds the maximum limit (casting deformation, rising box, etc.), and the machining workload is added. Non - machining site dimensions exceed tolerances, but do not affect the strength and use function. Not completely signed. The casting appearance is not bright, the casting edges are not clear, the impact is beautiful.
5. Check the inspection procedure 5.1 check the check list item by item and fill in the check list. 5.2 check the casting appearance quality. 5.3 casting data composition inspection (each batch) 5.4 casting scale error: 1) measure the thickness of the bottom panel, check the bottom surface margin of bottom plate. 2) after the bottom planer milling and processing, the ATOS looks at the margin of large castings such as upper and lower bottom plate, presser board and ejector. 3) slope wedge, slide block, block and other dimensions, and the remaining quantity doubt are confirmed by machining personnel and tell the quality inspector.
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