我國(guó)缸筒用高精度冷拔鋼管的技術(shù)與發(fā)展
Development of Manufacturing Technology of Cold-drawn Steel tube for Cylinder Casing Service
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摘要: 介紹了運(yùn)用平面應(yīng)變理論,在預(yù)應(yīng)力高剛性全液壓冷拔管機(jī)上,通過專減壁厚拔管的變形方式,直接拔制液壓氣動(dòng)缸筒用管。分析了拔管時(shí)的拔制力、合理減壁率及冷拔工藝與設(shè)備特點(diǎn)。提出了全面控制工藝系統(tǒng)精度是提高產(chǎn)品質(zhì)量的關(guān)鍵。實(shí)踐證明,采用高精度冷拔鋼管制造缸筒,其強(qiáng)度、剛度高,耐磨性能好,且具有內(nèi)表面硬外表面韌的特點(diǎn)。高精度冷拔缸筒管是直接制造各類缸筒的理想金屬材料。Abstract: Based on the plane strain theory, the steel tube for hydraulic/pneumatic cylinder casing service is produced with the prestressed, hi-rigidity and full hydraulically-operated cold-drawing bench and the deformation process for wall thickness reduction only. The drawing force, desirable wall thickness reduction and characteristics of both the cold-drawing technology and equipment are discussed, emphasizing that to enhance product quality it is crucial to take an overall control of accuracy of the technological system. Relevant operation has proven that the cylinder casing made of the hi-precision cold-dawn steel tube provides such advantages as satisfactory strength, high rigidity, good wear-resistance as well as hard inner surface and tough outer surface. The said hi-precision cold-drawn steel tube for cylinder casing service as an excellent metallic material can be processed directly into various kinds of cylinder casings.
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