Ultrasonic Thickness Checks for Planished Work
超声测厚与打平件壁厚验收
标签：超声测厚, 壁厚公差, 验收, 质检
打平减薄量验收建议用超声测厚仪（精度 ±0.01 mm）：器皿类在口沿、腰线、底部三点各测 3 处，相对原始坯厚的减薄应 ≤15%，局部超 20% 即判废——该处晶粒已被锤薄，承压件有渗漏风险。检测前磨去测点氧化层并滴耦合剂；批量件按 3% 抽检，数据记入随工单。多家欧系铜器作坊已把该流程写入出厂检验清单，减薄数据同时是保险与出口认证的必备证明。
Accept planished thinning with an ultrasonic gauge (±0.01 mm): on vessels, take three readings at rim, waist and base; overall thinning should stay ≤15% of the original blank, and any spot over 20% scraps the piece—the grains there are hammer-thinned and pressure parts risk leaks. Dress the oxide off each test point and couple with gel; sample 3% of batches and log the data on the job card. Several European copperware houses already list this check on their outgoing inspection sheets, and insurers and exporters demand the record.