论文部分内容阅读
1 我国的封头质量水平我国的封头生产能力已超过国内需求。但由于采用大而全、小而全的生产模式及其它原因,使我国的封头制造技术和质量水平与发达国家相比有较大的差距,普遍存在的问题是: (1)封头的尺寸精度不高①由于国内的封头生产一般采用热冲压成形,因钢板的加热温度不一,模具温度变化,压边力不均等因素,使封头的尺寸公差难以控制,同一批生产的封头尺寸也不一。因此,容器生产厂需先生产或购进封头,经
1 China’s Head Quality Level China’s head productivity has surpassed domestic demand. However, due to adopting large and small, complete production mode and other reasons, there is a big gap between our country’s head manufacturing technology and quality level and developed countries. The common problems are: (1) Dimensional accuracy is not high ① due to the domestic head of the general production of hot stamping, steel heating temperature varies, mold temperature changes, the edge pressure of uneven factors, the head of the dimensional tolerance is difficult to control the same batch of seals Head size is also different. Therefore, the container manufacturer must first produce or purchase head, after