Boots – shoes – and leggings
Patent
1997-08-11
1999-04-06
Ruggiero, Joseph
Boots, shoes, and leggings
219 6917, 36447435, G05B 1918
Patent
active
058926801
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method for correcting a discrepancy, as caused by the deflection of a machine, between the commanded position and the actual position of a machining point.
BACKGROUND TECHNIQUE
When a delay of action occurs by the deflection of a machine, between the drive point and the machining point of a driven member to which the force from a drive source is applied, there arises a problem that an inconsistency or action occurs between the machining point, as commanded by a control system, and the actual machining point. This positional displacement due to the deflection is conspicuous in an industrial machine having a distance between the drive point and the machining point, such as a wire electric discharge machine.
Therefore, a representative example of the electric wire electric discharge machine is schematically shown in FIG. 1. The components of this wire electric discharge machine not described with reference numerals are omitted from FIG. 1.
A column 2, fixed on the bed 1 of the wire electric discharge machine, has UV axes and Z axis 3 fixed on its upper end and an arm for supporting a lower wire guide fixed on its intermediate portion. The arm extends through an arm cover 4 which is fixed on the column 2. On the bed 1, there is mounted a cross table 5, which can be moved in the directions of X- and Y-axes. On the cross table 5, there are mounted a work carriage and a machining bath 6 for dipping the workpiece. Between the upper wire guide, disposed at the leading end of the Z-axis, and the lower wire guide, disposed at the leading end of the arm, there is a wire electrode 7 extended for performing the electric discharge machining.
The arm, integrally fixed to the column 2, is extended passing through the arm cover 4 into the machining bath 6, and the workpiece, fixed on the workpiece carriage mounted on the machining bath 6 and the cross table 5, is movable relative to the arm, so that it is necessary to ensure that the machining liquid can be prevented from leaking at the joint between the arm and the machining bath 6 during the aforementioned relative movements.
The cross table 5, the machining bath 6 and the workpiece are moved in the X-Y plane by driving and controlling an X-axis driving servo motor Mx and a Y-axis driving servo motor My through servo control circuits 12 and 13 of a control system 11.
The wire electric discharge machine body is provided with a jet nozzle at the leading end of the Z-axis, a machining liquid circulator for supplying the machining liquid to the machining bath 6, various motors for feeding the wire, and a discharge machining power source for applying the machining voltage to the wire electrode 7. These equipments are individually driven and controlled by the control system 11 through a machining liquid control circuit 14, a wire control circuit 15 and a discharge control circuit 16.
The control system 11 is provided with a CPU 19 for the CNC to drive and control the individual axes of the discharge machining apparatus on the basis of the system program, as stored in a ROM 17, and a machining program, as stored in a RAM 18. The CNC CPU 19 is connected with the aforementioned servo control circuits 12 and 13 through a bus 20. The CNC CPU 19 outputs distributed pulses to the servo control circuits 12 and 13 for the individual axes to drive the servo motors of individual axes, move the cross table 5, and establish the discharge for the machining between the face of the workpiece, as carried on the workpiece carriage of the machining bath 6, and the wire electrode 7.
A CPU 21 for the PMC drives and controls the discharge control circuit 16, the wire control circuit 15 and the machining liquid control circuit 14 in accordance with the system program, stored in the ROM 17, and the power supply conditions and the machining conditions stored in the RAM 18.
The CNC CPU 19 is connected through a display control circuit 22 to a manual data input unit 23 with a display, so that the machining program and the power supply and machining c
REFERENCES:
patent: 4567342 (1986-01-01), Nozawa
patent: 5324908 (1994-06-01), Masuda et al.
patent: 5514941 (1996-05-01), Kita
Kita Yuki
Takayama Yushi
Tsuboguchi Yuji
Fanuc Ltd
Ruggiero Joseph
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