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1. 发明专利

JP2003240605A LINEAR ENCODER 审中-公开
公开(公告)号：JP2003240605A
公开(公告)日：2003-08-27
申请号：JP2002036956
申请日：2002-02-14
申请人： OKUMA MACHINERY WORKS LTD
发明人： YASHIRO ATSUSHI , YOKOYAMA MASASHI , MATSUI KEIJI , HAYASHI KOICHI
IPC分类号： G01D5/245 , G01D5/244
摘要： PROBLEM TO BE SOLVED: To provide a device capable of highly-reliable absolute position detection, concerning a linear encoder for performing long-stroke position detection. SOLUTION: An offset operation part 35 realizes the precision of highly- reliable position detection, by comparing a slider position PABS operated by an absolute system with a slider position PINC operated by an incremental system. When values of the PABS and the PINC are different during a prescribed period, a reset processing part 36 resets a counter 26 used for the incremental system, and the offset operation part 35 replaces an offset value stored in an offset storage part 27. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2003136372A METHOD AND DEVICE FOR AUTOMATICALLY MEASURING TOOL SIZE 审中-公开
公开(公告)号：JP2003136372A
公开(公告)日：2003-05-14
申请号：JP2002023181
申请日：2002-01-31
申请人： OKUMA MACHINERY WORKS LTD
发明人： NONOMURA RYOTA
IPC分类号： B23Q3/155 , B23Q17/22
摘要： PROBLEM TO BE SOLVED: To provide a method and a device to measure both the tool diameter and the tool length in a tool passing passage in tool changing action without moving a first measuring sensor to measure the tool diameter and a second measuring sensor to measure distance to a designated measuring position. SOLUTION: A next tool T2 in a tool pot 3 and a used tool T1 on a main shaft are grasped by a tool changing arm 5 to be pulled downward from the tool pot 3 and the main shaft 2. In the middle of it, distance L1 between the designated measuring position 5c of the tool changing arm 5 and the second measuring sensor 10 at a lower position when a tip of the next tool T2 is detected by the first measuring sensor 9 sideways of it is measured. The tool changing arm 5 is further moved downward, and distance L2 between the designated measuring position 5c of the tool changing arm 5 and the second measuring sensor 10 when a reference diameter do of a shank Toc of a tool holder of the next tool T2 is detected by the first measuring sensor 9 is measured. The tool length L is determined based on the distance L1 and the distance L2.

3. 发明专利

JP2003134870A RELUCTANCE SYNCHRONOUS MOTOR AND CONTROL METHOD THEREOF 审中-公开
公开(公告)号：JP2003134870A
公开(公告)日：2003-05-09
申请号：JP2001317668
申请日：2001-10-16
申请人： OKUMA MACHINERY WORKS LTD
发明人： SATAKE AKIYOSHI
IPC分类号： H02P25/08 , H02K19/10 , H02P5/05
摘要： PROBLEM TO BE SOLVED: To provide a reluctance motor which can be driven at low speed of revolution, without lowering the generated torque and can be driven stably at high speed of revolution. SOLUTION: A main magnetic pole group having a large number of magnetic poles and an auxiliary magnetic pole group having a small number of poles are formed in a soft magnetic material rotor 4, made of soft magnetic material by utilizing gaps 6 or non-magnetic materials. Main windings 2 and auxiliary windings 3, which generate magnetic fields, corresponding respectively to the main magnetic pole group and the auxiliary magnetic pole group, are provided on a stator 1. At a low speed revolution state, currents are applied to the main windings 2 or the main windings 2 and the auxiliary windings 3, and in a high speed revolution state, currents are applied to the auxiliary windings 2, to change pole to drive a motor.

4. 发明专利

JP2003088196A CONTROLLER OF MOTOR 审中-公开
公开(公告)号：JP2003088196A
公开(公告)日：2003-03-20
申请号：JP2001271695
申请日：2001-09-07
申请人： OKUMA MACHINERY WORKS LTD
发明人： SATAKE AKIYOSHI
IPC分类号： H02P21/00 , H02P6/06 , H02P6/08 , H02P6/17 , H02P6/28 , H02P21/06 , H02P21/14 , H02P21/18 , H02P21/22 , H02P21/24 , H02P21/26 , H02P21/28 , H02P23/14 , H02P25/08 , H02P27/04 , H02P7/05
摘要： PROBLEM TO BE SOLVED: To provide a controller of motor in which stabilized control can be ensured by avoiding instability of control caused by voltage saturation, rotor structure and magnetic characteristics of a soft magnetic material. SOLUTION: A field current correction value is operated from a voltage value obtained by a voltage estimator for estimating the voltage value between the terminals of a motor with reference to the detection value of a current detecting means and a rotor speed, and then a field current command value is operated by correcting a flux command value with the field current correction value. Sign of the field current command value is judged before correction and field current bias values are determined for both positive and negative signs of the field current command value before correction. A field current command value is operated by correcting the field current command value before correction with the field current bias value.

5. 发明专利

JP2002361537A TWO-PALLET CHANGING DEVICE 失效
公开(公告)号：JP2002361537A
公开(公告)日：2002-12-18
申请号：JP2001176106
申请日：2001-06-11
申请人： OKUMA MACHINERY WORKS LTD
发明人： KONDO MIKIO
IPC分类号： B23Q7/00
摘要： PROBLEM TO BE SOLVED: To improve the workability by designating the set-up position at one point. SOLUTION: A frame 8 is installed horizontally in the vicinity of a working machine 2. A chain 22 is provided inside the frame 8 in a circulating manner by right and left horizontal shafts 24. Six sets of pallet receivers 15 are arrayed in the positions at which the overall length of the chain 22 is divided into six sections at equal intervals. The chain 22 is driven by a motor 21 at the maximum stroke of substantially two times the receiver array span. As the chain 22 is circulated, the pallet receivers 15 with pallets A and B loaded thereon are transferred to an upper part of the frame 8, and three empty pallet receivers 15 are accommodated in an accommodation part 81.

6. 发明专利

JP2002357471A LIQUID LEVEL CONTROLLING METHOD IS MIXTURE OF MULTIPLE LIQUIDS 失效
公开(公告)号：JP2002357471A
公开(公告)日：2002-12-13
申请号：JP2001165221
申请日：2001-05-31
申请人： OKUMA MACHINERY WORKS LTD
发明人： WAKAOKA SHUNSUKE , YAMANAKA OSAMU , ANDO TAKEHARU , KIRIYAMA MASAYUKI
IPC分类号： G01F23/24 , B01D17/12 , G01F23/28 , G01N27/06
摘要： PROBLEM TO BE SOLVED: To surely detect a liquid boundary surface in a mixture of liquids different in specific gravity for making the control of the boundary surface possible. SOLUTION: An ultrasonic sensor 19 is arranged on the outside wall of a tank 4 adjusted to the boundary high limit position so that the liquid boundary surface in the tank 4 filled with liquids of different specific gravity does not exceed a predetermined position. When the liquid boundary surface position inside the tank reaches the sensor position, the ultrasonic sensor 19 detects this event according to a change of reflection wave so that proper measure can be taken.

7. 发明专利

JP2002349765A WIRING PIPING STRUCTURE OF MACHINE 失效
公开(公告)号：JP2002349765A
公开(公告)日：2002-12-04
申请号：JP2001153369
申请日：2001-05-23
申请人： OKUMA MACHINERY WORKS LTD
发明人： HAMAGUCHI MAKOTO
IPC分类号： F16L3/16 , H02G3/04 , H02G3/22 , H02G3/38 , H02G11/00
摘要： PROBLEM TO BE SOLVED: To provide a wiring piping structure for reducing a looseness quantity without applying unreasonable bending to a flexible wiring piping. SOLUTION: A joint 6 is installed in a fixing cover 5 of a machine tool. A joint 10 is installed in a unit 4. A joint cylinder 9 is arranged with an upper surface 8a of a support 8 moving together with the unit 4 as a junction place. In the joint cylinder 9, a bracket 11 is installed on the upper surface 8a of the support 8. The joint cylinder 9 can be rotated and rocked on a horizontal shaft at a right angle to the moving direction of the unit 4 to the bracket 11. The flexible wiring piping is connected between the joint 6 and the joint cylinder 9. The joint cylinder 9 changes a connecting angle according to a movement of the unit 4.

8. 发明专利

JP2002340083A VIBRATION ISOLATING DEVICE OF LOADER 失效
公开(公告)号：JP2002340083A
公开(公告)日：2002-11-27
申请号：JP2001143808
申请日：2001-05-14
申请人： OKUMA MACHINERY WORKS LTD
发明人： AZUSAWA TAKAHIKO , KURIYAMA JUNICHI
IPC分类号： B23Q7/04 , F16F15/02
摘要： PROBLEM TO BE SOLVED: To provide a vibration isolating device for loader of a simple and space-saving structure while the machining accuracy of a machine tool can well be maintained. SOLUTION: The vibration isolating device is applied to a loader 2 which is equipped with a loader column 8 fixed to the base 6 of an NC lathe 4, a traveling beam supported by the column 8, and a loader carriage 12 to travel on the beam, wherein a column 42 to hold a control box 40 having approximately the same mass as the carriage 12 is fixed to the base 6, and an intermediate column 44 having higher stiffness than the that of loader column 8 or the column 42 is installed on the base 6 in its position approximately in the middle between the loader column 8 and the column 42 in the front, and a coupling plate 46 is couple with these columns in such a condition as rotatable relative to each of them.

9. 发明专利

JP2002337022A BROACH GUIDE JIG FOR MACHINING KEY GROOVE 失效
公开(公告)号：JP2002337022A
公开(公告)日：2002-11-26
申请号：JP2001141924
申请日：2001-05-11
申请人： OKUMA MACHINERY WORKS LTD
发明人： TANAKA TSUNEO
IPC分类号： B23D39/00
摘要： PROBLEM TO BE SOLVED: To provide a broach guide jig for machining a key groove capable of preventing deviation when forming the key groove. SOLUTION: This broach guide jig 1 for machining the key groove forms the key groove extending in the length direction of a work W in the internal circumferential face of a cylindrical hole W1 of the work W. The outer circumferential face of the broach guide jig 1 is formed with a broad guide groove 2 extending in its length direction and two contact parts 6 and 7 similarly extending in the length direction and contacting with the internal circumferential face of the cylindrical hole W1 when forming the key groove, at equal-angle intervals in the circumference direction. A positioning key insertion groove 3 extending in the length direction is formed in a position separated by 180 deg. from the broach guide groove 2 in the circumferential direction in the outer circumferential face of the broach guide jig 1.

10. 发明专利

JP2002329284A SENSOR UNIT AND DETECTED DATA TRANSMITTER 失效
公开(公告)号：JP2002329284A
公开(公告)日：2002-11-15
申请号：JP2001133358
申请日：2001-04-27
申请人： OKUMA MACHINERY WORKS LTD
发明人： HAYASHI KOICHI
IPC分类号： G08C25/00 , G05B19/414 , G06F11/10
摘要： PROBLEM TO BE SOLVED: To provide a sensor unit and a numerical controller which can construct a system that has high reliability at a low cost. SOLUTION: A host controller 20 transmits an error confirmation numeric value RND generated by a random number generator 18 from a transmitting circuit 11 to a servo controller 13. In a rotary encoder 21, a sensor control computer 17 inputs position data detected by sensors 4, 5 and 6 and the error confirmation numeric value RND received by a receiving circuit 8 via the servo controller 13 to a function computing element 16. The sensor control computer 17 transmits an error confirmation code SED of the function computing element 16 together with position detection data with a transmitting circuit 9. The host controller 20 receives the position detection data transmitted from the rotary encoder 21 and the error confirmation code SED via the servo controller 13 with a receiving circuit 15. The received position data and error conformation numeric value RND are inputted to a function computing element 19. A host control computer 22 compares a receiving side operation value SEC of the function computing element 19 with the error confirmation code SED.

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