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Volume 05 - Surface Engineering Part 4

Tham khảo tài liệu 'volume 05 - surface engineering part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Equipment Specification Plating tank 1440 L or 380 gal 2.7 by 0.76 by 0.76 m 9 by 2 2 by 22 ft Other tanks 420 L or 110 gal 0.91 by 0.76 by 0.76 m 3 by 2 2 by 22 ft Power rectifier 600 A 1.5 to 6 V Dimensions of rectifier 0.76 by 0.91 by 2.1 m 22 by 3 by 7 ft Total floor space of equipment and access area 2.0 by 4.6 m 62 by 15 ft Number of racks 15 Other tanks include a cleaning tank an acid pickle tank a hot-water rinse tank and three cold-water rinse tanks. Table 5 Equipment requirements for cadmium plating of valve bodies and baffle plates in still tanks Production requirements Valve body Baffle plate Weight per piece 1.1 kg 22 lb 0.2 kg 0.5 lb Pieces plated per hour 210 175 Area plated per hour 6.5 m2 70 ft2 11.1 m2 120 ft2 Minimum thickness 8 pm 320 pin. 4 pm 160 pin. Barrel plating may be used for parts up to 100 mm 4 in. long and 50 mm 2 in. thick. Parts such as machine bolts nuts and washers are ideal for barrel plating. Conversely intricate shapes such as ornaments and complex castings of brittle metals with small sections that fracture easily should not be barrel plated the tumbling action may damage these parts and variation in plating thickness and appearance may result. Intricate designs incorporating recessed or shielded areas may present problems in plating coverage luster and appearance. Barrel plating is not applicable for parts requiring heavy plate. Usually 8 to 13 pm 320 to 520 pin. is the maximum thickness of plate applied. Example 2 Barrel Plating of Small Coil Springs and Brush Holders. Small coil springs and brush holders are illustrative of parts suitable for barrel plating. Production requirements for plating these parts in horizontal barrels are given in Table 6. Equipment specifications are as follows Equipment Specification Plating tank 1330 L or 350 gal 1.8 by 1.2 by 0.76 m 6 by 4 by 22 ft Other tanks 605 L or 160 gal 0.91 by 1.2 by 0.76 m 3 by 4 by 22 ft Power rectifier 2000 A 9 to 15 V Dimensions of rectifier 0.91 by 1.2 by 2.4 m 3 .