TA1Φ158×20 mm管坯的挤压生产工艺改进

Extrusion process improvement of Φ158 × 20 mm TA1 tube blank

我厂一直以来采用3,150 t水压机Φ300的系统——即挤压筒为Φ300的系统进行坯锭挤压来生产牌号为TA1,规格为Φ158×20 mm的纯钛管坯。由于客户要求挤压成品管坯的定尺长度为2,800 mm,公差范围0+15 mm,若采用现有工艺进行挤压则剩余乱尺长达1,034 mm,过于浪费。因此对挤压工艺进行了更改,即采用3,150 t水压机Φ330系统挤压坯锭规格为Φ323~324×780 mm,经计算挤压比为8.6,挤压力远低于设备极限。挤压后管坯长度为6,133 mm,可中断出2支定尺/锭,挤压效率提升一倍,材料成本降低35%。该挤压工艺流程既满足客户要求,又达到降本增效的目的。

TA1 tubes with a specification of Φ158 × 20 mm have been produced by 3,150 t hydraulic press. Due to customers' requirements,the length of the finished tubes is 2,800 mm and the tolerance range is 0 + 15 mm. If the existing technology is used for extrusion,the remaining scale will be between 1,180 mm and 1,900 mm,which is too long. Therefore, extrusion process has been changed to using 3,150 t hydraulic press to produce billets with a specification of Φ323 ~ 324 × 780 mm.Extrusion ratio is 8. 6,which is much lower than the equipment limitation. After extrusion,the length of tubes is 6,133 mm,which can be cut into two parts. The efficiency of extrusion can be improved greatly and the material cost can be lowered by 35%. The process can not only meet the standard of the customer but also increase the efficiency by reducing cost.