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    • 4. 发明授权
    • Microscopic positioning device and tool position/orientation compensating method
    • 显微定位装置和刀具位置/方向补偿方法
    • US06920696B2
    • 2005-07-26
    • US10853140
    • 2004-05-26
    • Kiyoshi SawadaKenzo EbiharaYasuhiro Sakaida
    • Kiyoshi SawadaKenzo EbiharaYasuhiro Sakaida
    • B23Q5/22B23Q1/34B23Q5/28G05D3/00H01L41/09G01B5/00B23Q3/18
    • H02N2/0095Y10S977/837Y10S977/872
    • A microscopic positioning device having machine rigidity and being capable of achieving nano-order positioning accuracy and a method of compensating tool position and orientation. A driving unit comprises two piezoelectric elements P1 and P2 arranged into alignment along an expanding/shrinking direction. Both ends of the piezoelectric element P1, facing in the expanding/shrinking direction, are fixed to a base member and a movable member, respectively. The other piezoelectric element P2 is fixed to the base member only at one end. A gap L is formed between the piezoelectric element P2 and the movable member. Where expanding displacement amounts of the piezoelectric elements P1 and P2 are a1 and a2, respectively, voltage applied to the piezoelectric elements P1 and P2 is so controlled to satisfy an equation, a1+a2=a≧L. It is possible to position the movable member at a position within a maximum stroke a in the nano-order. The driving units may be arranged in the orthogonal directions, thereby providing the positioning device with two degrees of freedom, and further providing six degrees of freedom including rotation axes.
    • 具有机械刚度并且能够实现纳米级定位精度的微观定位装置和补偿刀具位置和取向的方法。 驱动单元包括沿扩张/收缩方向排列成对准的两个压电元件P 1和P 2。 面向膨胀/收缩方向的压电元件P 1的两端分别固定在基座部件和可动部件上。 另一个压电元件P 2仅在一端固定到基座构件。 在压电元件P 2和可动件之间形成间隙L. 在压电元件P 1和P 2的扩大位移量分别为1和2的情况下,施加到压电元件P 1和P 2的电压被控制以满足等式,a 1 + a 2 = a> = L. 可以将可动构件定位在纳秒级的最大行程a内的位置。 驱动单元可以沿正交方向布置,从而为定位装置提供两个自由度,并进一步提供六个自由度,包括旋转轴。
    • 5. 发明授权
    • Method and apparatus for electrical discharge machining with control of
a servomechanism by a position loop and a speed loop
    • 通过位置环和速度环控制伺服机构的放电加工方法和装置
    • US5589086A
    • 1996-12-31
    • US313278
    • 1994-10-05
    • Kiyoshi SawadaShun'ichi Odaka
    • Kiyoshi SawadaShun'ichi Odaka
    • B23H1/02B23H7/18B23H7/20B23H7/32G05B19/416
    • B23H7/20B23H7/18
    • An electric discharge machining apparatus generates an electric discharge by applying a voltage across a tool electrode and a workpiece. Axial movement amounts for controlling the tool electrode are first input into a plurality of corresponding position loop control sections and speed loop control sections to thereby control corresponding servomechanisms. An electric discharge machining condition corresponding to a gap between the tool and the workpiece is then detected by a gap condition detector. To maintain an appropriate electric discharge machining condition, a detected value and a target value of the tool are subtracted to produce a deviation value. The deviation value is then multiplied by axial components of a direction vector to produce retraction speed commands. Integrators integrate the retraction speed commands to produce correction movement amounts which are then added to the axial movement amounts and input into corresponding position loop control sections. The retraction speed commands are also directly input into corresponding speed loop control sections to thereby effect movement of the tool electrode.
    • PCT No.PCT / JP94 / 00148 Sec。 371日期:1994年10月5日 102(e)日期1994年10月5日PCT 1994年2月2日PCT公布。 出版物WO94 / 17948 日期1994年8月18日放电加工装置通过在工具电极和工件上施加电压来产生放电。 首先将用于控制工具电极的轴向移动量输入到多个对应的位置环控制部分和速度环控制部分中,从而控制相应的伺服机构。 然后通过间隙条件检测器检测与刀具和工件之间的间隙对应的放电加工条件。 为了保持适当的放电加工条件,减去工具的检测值和目标值以产生偏差值。 然后将偏差值乘以方向矢量的轴向分量以产生回缩速度指令。 积分器集成回退速度指令以产生校正移动量,然后将其加到轴向移动量上并输入相应的位置回路控制部分。 退回速度命令也直接输入到相应的速度环控制部分中,从而实现工具电极的移动。
    • 8. 发明授权
    • Method for coiling a wire around a stator core
    • 绕定子铁心绕线的方法
    • US06239528B1
    • 2001-05-29
    • US09456544
    • 1999-12-08
    • Kiyoshi SawadaTomohiko KawaiMasaki Suzuki
    • Kiyoshi SawadaTomohiko KawaiMasaki Suzuki
    • H02K100
    • H02K3/04H02K3/46H02K15/08Y10T29/49071
    • A winding of a motor is formed by coiling a wire around a slotless stator core with combination of troidal coiling and array coiling. The toroidal coiling is carried out in a manner such that the wire is coiled without any intersecting turns in one direction for the formation of the winding as it is coiled rotating spirally. By this coiling method, the accuracy of the position of the winding in the direction tangent to the surface of the stator core can be improved. The array coiling is carried out in a manner such that the winding is formed in layers that are stacked on one another. By this coiling method, the accuracy of the position of the winding in the direction normal to the surface of the stator core can be improved. Thus, the overall thickness of the winding can be made uniform.
    • 电动机的绕组通过将铁丝缠绕在无槽定子芯上并通过组合线状卷绕和阵列卷绕而形成。 环形卷绕以这样的方式进行,使得线圈在一个方向上没有任何相交的匝卷绕,以便在卷绕螺旋状旋转时形成绕组。 通过这种卷取方法,能够提高与定子铁芯的表面相切的方向的绕组的位置精度。 阵列卷绕以使得绕组形成为彼此堆叠的层的方式进行。 通过这种卷取方法,可以提高绕组在与定子铁心表面垂直的方向上的位置精度。 因此,可以使绕组的整体厚度均匀。