一种可以改善钢管内孔螺旋缺陷的冷拔模具  

A Cold-drawing Die for Eliminating Steel Pipe Inner Surface Spiral Defect

作　　者：王家聪 刘贤翠 韦金钮 张嘉根 WANG Jiacong;LIU Xiancui;WEI Jinyu;ZHANG Jiagen(Technical Center,Xuzhou Xugong Hydraulic Component Co.,Ltd.,Xuzhou 221004,China)

机构地区：[1]徐州徐工液压件有限公司技术中心,江苏徐州221004

出　　处：《钢管》2020年第5期70-72,共3页Steel Pipe

摘　　要：介绍了一种可以改善钢管内孔螺旋缺陷的新型冷拔模具。该模具利用金属会自动流向阻力最小方向的变形原理,使钢管内孔金属发生两次周向流动,解决了钢管内孔的螺旋问题。新模具加工出来的钢管壁厚均匀性更好,提高了钢管内表面质量,消除了后续加工过程中液压油缸缸筒的内孔尺寸波动和油缸的内孔螺旋现象,杜绝了油缸的抖动和发响情况。Flaborated here in the article is a newly-deve loped cold-drawing die to eliminate the steel pipe innersurface spiral defect.Based on the deformation principle that the metal naturally flows towards where the resistance isminimum,the die can make the inner surface metal of the pipe flows twice circumferentially so as to fix the said spiraldefect problem.The steel pipe as processed with the said die has good wall thickness homogeneity,getting the surfacequality improved,and thus eliminating the phenomenon of inner bore dimensional inconsistency of the hydraulic cylindercase,and the inner surface spiral defect of the cylinder proper as may occurring during the subsequent processing course.As a result the troubles of vibration and noise as made by the hydraulic cylinder are completely fixed.

关 键 词：冷拔管 内孔螺旋 油缸缸筒 冷拔内模 金属流动 

分 类 号：TG355.4[金属学及工艺—金属压力加工]