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    • 4. 发明公开
    • Tool touch probe system and method of precision machining
    • Werkzeugtastsystem并进行精密加工的方法。
    • EP0072687A2
    • 1983-02-23
    • EP82304301.3
    • 1982-08-16
    • GENERAL ELECTRIC COMPANY
    • Kelley, John RobertZurbrick, John Ross
    • G05B19/18
    • G05B19/4015G05B2219/37207G05B2219/37231G05B2219/37351G05B2219/49169G05B2219/49392G05B2219/50031Y10T408/172
    • A system and method are disclosed for automatically machining a work piece to precise selectively determined dimensions under computer numerical control in which the cutting tool is set automatically and automatic on-machine inspection is performed of the machined work piece surfaces. Using vibration sensing to detect contact between the cutting edge (32) of the cutting tool and position reference surfaces (164, 166), the cutting edge is calibrated against these surface under closed loop control. The deviation between the programmed and the actual positions of the cutting edge at each reference surface is determined and an initial compensating tool position offset is automatically provided in each axis and is entered into numerical control means. After machining has been initiated, probing of the work piece occurs at least once before the final cut is taken. The tool functions as a tool touch probe during this operation and vibrations are sensed as the calibrated cutting edge is brought into contact with the machined surface. Appropriate tool position offsets are determined and entered into the numerical control means at that time, to assure that the dimensions of the finished surface will conform to the desired dimensions. After final machining has taken place, the finished surface is again probed with the calibrated cutting edge, using vibration sensing. Deviations from the desired dimensions are determined and are indicated together with the allowable machining tolerance for each dimension.
    • 7. 发明公开
    • Machine tool provided with a calibration apparatus adapted to compensate for its structural thermal deformation.
    • 与用于补偿它们的结构的热变形的校准装置机床
    • EP2821868A1
    • 2015-01-07
    • EP13425095.0
    • 2013-07-04
    • VIGEL S.p.A.
    • Massaia, MarcoStabio, DiegoFrancesia Villa, Daniele
    • G05B19/401
    • G05B19/4015G05B2219/49169G05B2219/49207G05B2219/50016G05B2219/50031
    • A frame (12) suports a machining head (36) and a support (24, 26) for workpieces (28a, 28b, 30a, 30b). The head (36) may shift with respect to the support (24, 26) along an axis (Y) upon control of a control unit (CNC). A proximity sensor (38) attached to the machining head (36) is connected to transmit an electric signal to the control unit (CNC), which signal is variable as a function of the distance of the sensor (38) from a reference element (40) attached to the support (24, 26). The control unit (CNC) is programmed to perform a calibration cycle, upon command, in which the machining head (36) is moved to a predetermined reference position (X_REF, REF_VALUE, Z_REF) in which the sensor (38) is capable of detecting the distance of the reference element (40), the actual distance (ACT_VALUE) of the reference element (40) is measured by the sensor (38), the measured actual distance (ACT_VALUE) is compared with a predetermined reference distance (REF_VALUE), and any difference between the actual distance (ACT_VALUE) and the reference distance (REF_VALUE) is compensated by correspondingly correcting the distance between the machining head (36) and the support (24, 26) along the axis (Y) during machining.
    • 框架(12)suports的加工头(36)和用于工件的支撑件(24,26)(28A,28B,30A,30B)。 所述头部(36)可相对于沿着上时的控制单元(CNC)的控制轴(Y)的支撑件(24,26)移位。 附接至所述加工头(36)的接近传感器(38)是连接到发送(到电信号至控制单元(CNC),该信号是作为所述传感器(38)的距离的从参考元件的功能可变 40)附接到所述支撑件(24,26)。 所述控制单元(CNC)进行编程以执行校准周期,根据命令,其中,所述加工头(36)移动到预定基准位置(X_ref,REF_VALUE,Z_REF),其中传感器(38)能够检测 参考元件(40),所述实际距离参考元件(ACT_VALUE)(40)的距离由所述传感器(38),测量的实际距离(ACT_VALUE)测量与预定的基准距离进行比较(REF_VALUE) 和实际距离(ACT_VALUE)和参考距离(REF_VALUE)之间的任何差由加工过程中相应地校正所述加工头(36)和支撑(24,26)沿所述轴线(Y)之间的距离来补偿。
    • 10. 发明申请
    • ELECTRIC DISCHARGE APPARATUS
    • 电动放电装置
    • WO1988003074A1
    • 1988-05-05
    • PCT/JP1987000815
    • 1987-10-23
    • MITSUBISHI DENKI KABUSHIKI KAISHASUZUKI, Toshio;MAGARA, Takuji;
    • MITSUBISHI DENKI KABUSHIKI KAISHA
    • B23Q15/00
    • B23H7/20G05B19/232G05B19/404G05B2219/41036G05B2219/45221G05B2219/49169G05B2219/49194G05B2219/49219
    • In an electric discharge apparatus of the type wherein an electrode (1) such as a wire electrode or a diesinking electrode and a workpiece (6) are disposed in such a manner as to face each other with a very small gap between them, a working solution (7) is put into the very small gap, discharge is caused between the electrode (1) and the workpiece (6), and the electrode (1) and the workpiece (6) are moved relatively by driving shafts (37), (67) such as ball screws in order to electrically discharge the workpiece (6) into a desired shape, the present invention determines correction data for correcting the driving quantity of the driving shafts (37), (67) under a plurality of different load and temperature conditions, stores in advance these correction data in a memory (41), selects a correction data suitable for the actual working condition from among the correction data thus stored in the memory and corrects the driving quantity to be given to the driving shafts (37), (67) in accordance with the selected correction data. Even if the driving shafts (37), (67) undergo expansion or contraction due to heat from surroundings, or deformation or expansion/contraction due to load by the weight of the workpiece (6) and the working solution (7), the driving quantity of the driving shafts (37), (67) can be corrected correctly. Accordingly, the relative position between the workpiece (6) and the electrode (1) can be controlled accurately, and high precision working can be performed.
    • 在这样的放电装置中,其中诸如线电极或去耦电极的电极(1)和工件(6)以彼此之间以非常小的间隙彼此面对的方式设置,工作 溶液(7)被放入非常小的间隙中,在电极(1)和工件(6)之间引起放电,并且电极(1)和工件(6)通过驱动轴(37)相对移动, (67),以便将工件(6)电气放电成所需的形状,本发明确定用于校正多个不同负载下的驱动轴(37),(67)的驱动量的校正数据 和温度条件,将这些校正数据预先存储在存储器(41)中,从存储在存储器中的校正数据中选择适合于实际工作状态的校正数据,并校正要提供给驱动轴的驱动量( 37),(67) e选择校正数据。 驱动轴(37),(67)由于来自周围环境的热量而发生膨胀或收缩,或者由于工件(6)和工作液(7)的重量造成的负荷引起的变形或膨胀/收缩,驱动 可以正确地校正驱动轴(37),(67)的数量。 因此,可以精确地控制工件(6)和电极(1)之间的相对位置,并且可以进行高精度的加工。