钽铌管棒线制品加工尺寸公差的控制

Control of Dimensional Tolerances in Tantalum Niobium Tube Bar and Wire Products Processing

摘要: 通过反复旋锻的方法钽铌制品的加工精度能够控制在标准公差范围之内，旋锻机的进给速度和成品反复锻造次数决定了其成品的尺寸精度，进给速度越慢锻造次数越多，直径的椭圆度及标准差越小，反之则越大，采用旋锻 + 轧制的加工方式可以实现大直径薄壁厚到小直径厚壁管材的加工，一般普通管材的壁厚公差能够控制在±10%，采用点、线面修料及轧机三角架原理的方法高精度管材的壁厚公差能够控制在±8%。通过量具的Gage-R运行图数据统计后发现铌锆丝外径的可区分类别数 = 5，其测量系统是可接受的。

Abstract: The machining precision of tantalum-niobium products can be controlled within the range of standard tolerance by means of repeated rotary forging. The feed speed of rotary forging machine and the number of repeated forgings determine the dimensional accuracy of the finished products. The more forging times are, the smaller the ellipticity and standard deviation of the diameter are. On the contrary, the larger the rotary forging + rolling is adopted. In general, the wall thickness tolerance of common pipe can be controlled at +10%. The wall thickness tolerance of high precision pipe can be controlled at +8% by using the principle of point, line surface trimming and mill tripod. The Gage-R diagram data of the gauge show that the number of distinguishable categories of Nb-Zr wire diameter is 5, and the measuring system is acceptable.