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1. 发明专利

JPH08118177A TAPER SHANK FOR MACHINE TOOL 失效
公开(公告)号：JPH08118177A
公开(公告)日：1996-05-14
申请号：JP25800694
申请日：1994-10-24
申请人： HITACHI SEIKO KK
发明人： HAYASHI YOSHIHIRO , TANAKA SHINJI , MIKAMI ISATO
IPC分类号： B23Q3/12
摘要： PURPOSE: To provide a taper shank with desirable rotational balance and little vibration by forming ATC key grooves in the same dimension, and further forming drive key grooves in the same dimension. CONSTITUTION: In order to eliminate unbalanced shape to be the factor of vibration, the geometric asymmetry of a hollow taper shank 1 is improved as follows: The width of a pair of ATC key grooves 1a is made the same dimension, and the depth of a pair of drive key grooves 1c is made the same dimension. The depth of these drive key grooves 1c is unified to the larger dimension of the drive key grooves 1c, 1d so as to be usable as it is for a spindle for a standard hollow taper shank. On this occasion, a manual orientation cutout and an ID sensor fitting hole are disused.

2. 发明专利

JPH07266192A TOOL POSITION COMPENSATOR IN MACHINE TOOL 失效
公开(公告)号：JPH07266192A
公开(公告)日：1995-10-17
申请号：JP5793394
申请日：1994-03-29
申请人： HITACHI SEIKO KK
发明人： TANAKA SHINJI
IPC分类号： B23Q15/18
摘要： PURPOSE:To prevent drop in machining accuracy due to variations in a tool cutting edge position attributable to the expansion of a spindle and a tool holder by means of centrifugal force as well as to make a job for highly accurate machining achievable. CONSTITUTION:A measuring instrument is installed so as to be opposed to a rear end face of a drawbar for clamping a tool 10 to a spindle 3, measuring a position of the rear end face of the drawbar before rotation of the spindle 3, and this measured value is set in an arithmetic circuit 34 as the initial value, while another position of the rear end face of the drawbar after the rotation of the spindle 3 is reached to the specified revolution, is measured, seeking its difference with the initial value with the arithmetic circuit 34, and the output is inputted into a numerical control system 35 as a positional compensation value of the tool 10 at the time of machining.

3. 发明专利

JPH04322941A RECTILINEAR ROLLING GUIDE SUPPORTER 失效
公开(公告)号：JPH04322941A
公开(公告)日：1992-11-12
申请号：JP8542591
申请日：1991-04-17
申请人： HITACHI SEIKO KK
发明人： TANAKA SHINJI
IPC分类号： B23Q1/26 , B23Q11/00
摘要： PURPOSE:To simultaneously attenuate a rocking type vibration and a horizontal vibration by forming the base of a slider block so as to make a clearance between this slider base and a fluid tank base larger in front and in the rear end of the base of the slider block and smaller at the central part in the moving direction, respectively. CONSTITUTION:On the base of a slider block 8, a clearance is set to be smaller at a central part 12 as compared with that in front and rear parts 11, 13. something unequalness on work surface roughness comes out as a variation component of grinding force to a grinding wheel at the time of grinding a workpiece clamped to a table, producing a self-chattering vibration there. In front and in the rear end in the moving direction of the base of the slider block 8, variation in a clearance with the base of a fluid tank 9 grows larger due to a rocking type vibration making the neighborhood of a guideway of a movable body 1 as the turning center. In consequence, a squeeze film effect is produced in both these front and rear parts 11, 13 of the base of the slider block 8, checking this rocking type vibration to smallness. In addition, a horizontal vibration of the guideway of the movable body 1 is checked as shearing force of a fluid 10 works on the central part 12 of the base of the slider block 8.

4. 发明专利

JPH02262933A HORIZONTALLY ADJUSTING SUPPORTING DEVICE EQUIPPED WITH DAMPING FUNCTION 失效
公开(公告)号：JPH02262933A
公开(公告)日：1990-10-25
申请号：JP8004689
申请日：1989-03-30
申请人： HITACHI SEIKO KK
发明人： TANAKA SHINJI
IPC分类号： B23Q1/00
摘要： PURPOSE:To effectively attenuate the vibration generated by a machine tool by installing a damper block into the lower part of an adjusting bolt and supporting said damper block onto a fitting recessed part installed on a supporting board by forming a minute gap and pouring liquid into the minute gap. CONSTITUTION:When vibration is applied onto a machine tool, a relative shift is generated between a supporting board 22 and a damper block 27 installed in the lower part of an adjusting bolt 20 which is screwingly fixed onto a bed 21. At this time, variation is generated in the minute gap 33 between the damper block 27 and the side surfaces 28 and 30 of a fitting recessed part 32 and the bottom surfaces 29 and 31. The viscous resistance of the viscous liquid 34 which is generated by the vibration of the minute gap 33 forms a damping force, and vibration is attenuated, and the relative shift is reduced.

5. 发明专利

JPH06126593A MONITORING METHOD FOR VIBRATION IN MACHINE TOOL 失效
公开(公告)号：JPH06126593A
公开(公告)日：1994-05-10
申请号：JP28117192
申请日：1992-10-20
申请人： HITACHI SEIKO KK
发明人： TANAKA SHINJI
IPC分类号： B23Q15/00
摘要： PURPOSE:To prevent the damage of a main spindle and a pneumatic bearing by detecting the vibration of the main spindle during its operation. CONSTITUTION:The output of an acceleration pickup 13 attached to a spindle head 7 is judged by a vibration judging apparatus 14 having the first setting equipment to set up the first criterion for judging a dangerous state, the second setting equipment to set up the second criterion for judging an alarm issuing state, the first and the second comparator to mutually compare the output of the acceleration pickup 13 and the set value of each setting equipment, and a timer to receive the output of the second comparator for measuring time. On the result of the above judgement, a controller 15 controls the movement of a machine tool table 2, a column 4 and the spiradle head 7, and the revolution of a main spindle 10, and moreover an alarm display lamp 16 is turned on for indicating a controlled state.

6. 发明专利

JPH06126589A SPINDLE OF MACHINE TOOL AND ITS ROTATIONAL BALANCE REGULATING METHOD 失效
公开(公告)号：JPH06126589A
公开(公告)日：1994-05-10
申请号：JP28285092
申请日：1992-10-21
申请人： HITACHI SEIKO KK
发明人： WATABE KAZU , MIKAMI ISATO , HAMAZAKI SHINICHI , TANAKA SHINJI
IPC分类号： B23B19/02 , B23Q11/00 , F16F15/32 , F16F15/36 , G01M1/32
摘要： PURPOSE:To regulate the balance of the central part of a main spindle to facili tate the regulation of unbalance occurring at the central part of the spindle at the time of high speed revolution by inserting a balance regulating member into the axial center part of the spindle of a machine tool. CONSTITUTION:A plurality of balance regulating screw holes 1a, 9a are formed at the tip of a main spindle 1 and a nut 9. In addition, a balance regulating ring 10 is attached to a draw bar 7 located between coned disc springs 6. Next after the spindle 1 is assembled in a spindle head 3, a weight regulated in its weight is prepared so as to be inserted into the screw hols 1a, 9a, and after the rotational balance at the central part is previously regulated under a condition where the other parts are assembled on the spindle 1, the rotational balance of the whole of the spindle is regulated. Thus the vibration of the main spindle at the time of high speed revolution can be reduced.

7. 发明专利

JP2583522B2 失效
公开(公告)号：JP2583522B2
公开(公告)日：1997-02-19
申请号：JP22630387
申请日：1987-09-11
申请人： HITACHI SEIKO KK
发明人： WATABE KAZU , TANAKA SHINJI
IPC分类号： B23Q1/00 , B23Q1/34 , B23Q1/64 , F16M7/00

8. 发明专利

JPH048996A SUPPORTING DEVICE FOR MACHINERY 失效
公开(公告)号：JPH048996A
公开(公告)日：1992-01-13
申请号：JP10779990
申请日：1990-04-24
申请人： HITACHI SEIKO KK
发明人： TANAKA SHINJI
IPC分类号： F16M7/00
摘要： PURPOSE:To eliminate the imbalance of loads applied to respective supported positions of a machine by using a supporting means to the weight of the machine through liquid and connecting to it a liquid injection means for adjusting the liquid amount. CONSTITUTION:A supporting means 13 is constructed with an oil hydraulic cylinder 3, a piston 2, a piston rod 1, and a nut 12 or the like, and a liquid injection means is constructed with a pipe 8, a valve 15, a check valve 14, and a pump 16 or the like. The level adjusting work for a machine is carried out by adjusting the amount of oil 17 supplied from the pump 16 to move the piston 2 up and down In respective groups of supporting means, respective oil chambers 7 of supporting means are connected through to each other with a pipe 8, hence the oil pressure in respective oil chambers becomes equal, and the supported load is always kept constant with no relation to the position of the piston 2 in the oil chamber 3. Thereby the weight of the machine can be supported in good balance to make the level adjusting work easy.

9. 发明专利

JPH01269716A VIBRATION DAMPING DEVICE IN RECTILINEAR ROLLING GUIDE DEVICE 失效
公开(公告)号：JPH01269716A
公开(公告)日：1989-10-27
申请号：JP9559888
申请日：1988-04-20
申请人： HITACHI SEIKO KK
发明人： TANAKA SHINJI
IPC分类号： B23Q1/26 , B23Q1/00 , B23Q1/40 , B23Q1/58 , F16C29/00 , F16C29/04 , F16F15/02
摘要： PURPOSE:To reduce deformation due to excitation and to improve machining accuracy by providing a vibration damping device comprising an oil reservoir fixed to a bearing, a plate fixed to a column, a roller and oil in the above device used in a grinder or the like. CONSTITUTION:There is provided a vibration damping device 14 comprising an oil reservoir 10 fixed to a bearing 4a, a plate 11 fixed to a column 3, a roller 12 and oil 13. In this case, a clearance 17 between the surface 15 of the plate 11 and the base 16 of the oil reservoir 10 is set about 5-500mum. The oil reservoir 10 is filled with oil 13 until the oil leverl 18 exceeds the surface 15 at least. Though exciting force applied to a grindstone 1 is transmitted to a support portion 8 during machining, the displacement of the support portion 8 is lessened because the plate 11 as a structural part of the vibration damping device 14. Accordingly, if the device is applied to a grinder, the machining accuracy of a grinding surface can be improved.

10. 发明专利

JPH01153812A LINEAR ROLLER GUIDE DEVICE 失效
公开(公告)号：JPH01153812A
公开(公告)日：1989-06-16
申请号：JP31197887
申请日：1987-12-11
申请人： HITACHI SEIKO KK
发明人： WATABE KAZU , TANAKA SHINJI
IPC分类号： F16F15/03 , B23Q1/26 , B23Q11/00 , F16C29/00 , F16C29/04 , F16C29/10 , F16C33/10
摘要： PURPOSE:To damp exciting force without any frictional resistance so as to aim at improvement of machining accuracy of a fitting machine by arranging the surface of a bearing having magnets placed thereon and the inside surface of a fluid tank provided in a track to face each other with a gap therebetween and filling magnetic fluid in the gap. CONSTITUTION:Permanent magnets 11, N poles and S poles of which are alternatively positioned at predetermined intervals are fitted to a bearing 10a and a fluid tank 12 is provided in a track 10b. Magnetic fluid 16 is filled in a gap 15 between the surface of the bearing 10a and the inside surface 14 of the fluid tank 12. Accordingly, exciting force can be damped without any frictional resistance so that the machining accuracy of a fitting machine can be improved.

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