发明名称 |
METHOD FOR MAKING TUBES WITH HELICAL CORRUGATIONS |
摘要 |
plastic metal working. SUBSTANCE: method comprises steps of placing tube onto mandrel; forming helical corrugations by means of rollers arranged around tube and inclined relative to its lengthwise axis; applying torque relative to lengthwise axis of tube onto portion of tube approaching to rollers; applying axial effort to portion of mandrel removing from rollers and by means of mandrel - to portion of tube approaching to rollers. Torque may be applied in direction coinciding with rotation sign of tube caused by its engagement with rollers. Additional torque is applied to tube portion removing from rollers. EFFECT: enhanced efficiency. 3 cl, 1 dwg
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申请公布号 |
RU2152838(C1) |
申请公布日期 |
2000.07.20 |
申请号 |
RU19990117818 |
申请日期 |
1999.08.12 |
申请人 |
LYTKIN IGOR' NIKITICH;SHLJAKHIN ALEKSANDR NIKOLAEVICH;MISHULIN ARISTONIK ALEKSANDROVICH;GRUNIN NIKOLAJ NIKOLAEVICH;FROLOV ANDREJ NIKOLAEVICH |
发明人 |
LYTKIN I.N.;SHLJAKHIN A.N.;MISHULIN A.A.;GRUNIN N.N.;FROLOV A.N. |
分类号 |
B21D15/04;B21C37/20;B21D51/12;(IPC1-7):B21D15/04 |
主分类号 |
B21D15/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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