公开(公告)号：EP3120959A1

公开(公告)日：2017-01-25

申请号：EP14886647.8

申请日：2014-03-18

申请人： Nakata Manufacturing Co., Ltd.

发明人： WANG Feizhou ,  SATO Takeyuki ,  NAKATA Mitsuru ,  NAKANO Tomoyasu ,  MIURA Takamitsu

IPC分类号： B23D1/24 ,  B21C37/30 ,  B23K37/08

CPC分类号： B23D79/023 ,  B21C37/0811 ,  B23K31/02 ,  B23K37/08 ,  B23K2201/06 ,  B23K2201/10 ,  B23P11/00 ,  Y10T29/5182 ,  Y10T29/5185 ,  Y10T29/5199 ,  Y10T409/501804

摘要： An object is to prolong the life of a ring tool, and improve the productivity of a welded pipe. A ring tool unit is held in a downstream-side end portion of a mandrel to be inserted into a welded pipe currently being manufactured from the upstream side of a welding position, and is used as a cutting tool for continuously cutting a bead produced on the inner surface of the welded pipe, wherein the ring tool unit is formed by fitting a ring tool having a ring-like blade in a sleeve having a circular hole for holding the outer circumference of the ring tool.

摘要翻译： 目的是延长环形工具的使用寿命，提高焊接管的生产率。 环形工具单元被保持在心轴的下游侧端部，以插入到当前从焊接位置的上游侧制造的焊接管中，并且用作用于连续切割在 焊接管的内表面，其中环形工具单元通过将具有环形刀片的环形工具装配在具有用于保持环形工具的外周的圆形孔的套筒中而形成。

公开(公告)号：EP3104158B1

公开(公告)日：2019-10-30

申请号：EP14881914.7

申请日：2014-02-04

申请人： Nakata Manufacturing Co., Ltd.

发明人： TSURUTA Satoshi ,  MORISAKI Katsuhiko ,  NAKATA Mitsuru ,  ISHIGAKI Katsumi

IPC分类号： G01N3/12 ,  G01M5/00 ,  G01M3/28

公开(公告)号：EP3104158A1

公开(公告)日：2016-12-14

申请号：EP14881914.7

申请日：2014-02-04

申请人： Nakata Manufacturing Co., Ltd.

发明人： TSURUTA Satoshi ,  MORISAKI Katsuhiko ,  NAKATA Mitsuru ,  ISHIGAKI Katsumi

IPC分类号： G01N3/12

摘要： Even if test pipes have a wide range of sizes, a water hydraulic test on each of the test pipes is conducted accurately, efficiently, and economically.
Such an object is achieved by using a plurality of booster cylinders 41 arranged in parallel with respect to a test pipe and having respective boosting ratios increasing in stages. A plurality of servo motor driven pumps 51 arranged in parallel is used as a drive source for the plurality of booster cylinders 41. Before a water pressure on an output side of the booster cylinder 41 reaches a pressure near a test pressure, the plurality of servo motor driven pumps 51 operates simultaneously. Then, the plurality of servo motor driven pumps 51 stops operating except one and the water pressure on the output side of the booster cylinder 41 is increased to the test pressure by the one servo motor driven pump 51. During pressure increase, the plurality of booster cylinders 41 is used in turn in order of increasing boosting ratio.

摘要翻译： 即使试管的尺寸范围很宽，也可以准确，高效，经济地进行各试管的水压试验。 这样一个目的是通过使用多个相对于测试管并列布置的增压缸41来实现，并且各自的升压比分数增加。 多个并联配置的伺服马达驱动泵51用作多个升压缸41的驱动源。在升压缸41的输出侧的水压达到接近试验压力的压力之前，多个伺服 马达驱动泵51同时工作。 然后，多个伺服马达驱动泵51停止运转，除了一个伺服马达驱动泵51之外，在一个伺服马达驱动泵51上将增压缸41的输出侧的水压提高到试验压力。在加压期间， 依次增加气缸41的升压比。