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在滚珠位丝杠副的生产中,插管是一个关键的反向器件,其形状位置尺寸要求严格,弯制后的插管椭圆度要小于0.2mm,材料多采用不锈钢管(见附图)。目前,生产厂家普遍采用:下料—扩孔—穿铝芯—弯制—铣相贯线接头—热处理化铝—强碱腐蚀—发兰等。采用这种工艺,生产中所用铝芯必须车制,直径较细(如φ2.5mm)车削较困难。取出铝芯时,需加热700～800℃,铝液也不易从插管中流出,易造成插管的变形,用强碱腐蚀较慢,这样造成生产周期
In the production of ball screw pair, intubation is a key reverse device, the shape of the position and size of the strict requirements of the ellipticity of the cannula after bending is less than 0.2mm, the use of stainless steel tube material (see photo) . At present, manufacturers generally used: Blanking - reaming - wear aluminum - bending - milling intersecting line joints - heat treatment of aluminum - alkali corrosion - such as hair blue. Using this process, the aluminum core used in production must be car-made, smaller diameter (such as φ2.5mm) turning more difficult. Remove the aluminum core, the need to heat 700 ~ 800 ℃, aluminum liquid is not easy to flow from the intubation, easy to cause the deformation of the intubation, corrosion with alkali is slow, resulting in the production cycle