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减小用材量是提高石材加工效率最重要的途径之一。目前,由于饰面石材开采和加工工艺的特点,造成其制品用材量过大。石材加工企业的生产经验表明,在锯板时,除它种原因造成损失外,富含节理裂隙的荒料的板材产出率下降十分明显。为了降低锯板时的损失,国定全苏标准9479—76规定了目测荒料节理裂隙的详细办法。为使目测数据精确可靠、增强估计的客观性和查明目测根本无法发现的隐蔽缺陷起见,近来常常采用声学法来探查节理裂隙。声学法在估计呈复杂的细微节理
One of the most important ways to increase stone processing efficiency is to reduce the amount of wood used. At present, due to the characteristics of the mining and processing technology of decorative stone, the amount of wood used for its products is too large. The production experience of stone processing companies shows that, when sawing, in addition to the causes of losses caused by it, the production rate of sheet materials rich in joints and fissures drops significantly. In order to reduce the loss in sawing, the National Standard 9479-76 of the entire country specifies the detailed method for the visual inspection of joints and cracks in rough materials. In order to make visual data accurate and reliable, to enhance the objectivity of estimation, and to identify hidden defects that cannot be found by visual inspection, acoustic methods have recently been used to detect joint cracks. Acoustic method is complicated and delicate joints are estimated