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本期封面刊登的科研成果照片,是机械工业部西安重型机械研究所负责研究成功的300毫米精密四辊液压轧机。该轧机为高精度冷带材可逆轧机。该设备在一九八○年十二月份由一机部主持的全国四十个单位八十余名代表参加的鉴定会上,得到好评。根据鉴定会测试组的现场测试和测量,鉴定会认为:“该轧机产品精度高,对0.3毫米以下的软硬态材质,稳速通带公差为±5μ(对不锈钢带90%的测量点±3μ),达到国内外先进水平,板形良好,横向尺寸公差小于3μ”。
The cover of the current issue of scientific research photos, is the Ministry of Machinery Industry Xi’an Heavy Machinery Research Institute responsible for the successful study of 300 mm precision four-roll hydraulic mill. The mill is a high-precision cold strip reversible rolling mill. The equipment was appraised at an appraisal meeting attended by more than 80 representatives of 40 units nationwide presided over by a machine department in December 1980. According to the field test and measurement of the test group, the appraisal will hold that: "The mill product has high precision. For hard and soft materials of 0.3 mm or less, the tolerance of steady speed passband is ± 5μ (90% of measuring point of stainless steel ± 3μ), reached the advanced level at home and abroad, good shape, horizontal size tolerance of less than 3μ.