JPH07101171B2 - Stack thickness deviation measuring device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stack thickness deviation measuring device for a stack core such as a stator core, a rotor core or a transformer core of a rotating electric machine.

[Technical background of the invention and its problems] For example, a stator core of a rotating electric machine has a plurality of spacing pieces for stacking a plurality of thin iron plates 1 as shown in FIG. 7 and forming a cooling passage in the middle thereof. 2 is provided, and a lower ring 3 and an upper ring 4 are provided at both ends in the axial direction. Each iron plate 1 of the stator core configured as described above
Has a plate thickness deviation, and when the iron plates 1 are stacked, a difference occurs in the thickness of the iron core. If a rotary electric machine is assembled using the iron core having the stacking thickness deviation, a predetermined torque may not be obtained, which is not preferable. Therefore, it is necessary to measure and correct the stack thickness deviation of the iron core.

Conventionally, in order to measure the above-mentioned stacking thickness deviation, a hydraulic drive device (for example, a hydraulic cylinder and a piston) 5 as shown in FIG. 7, and a slider 6 which is moved by this thrust force,
The pressure rod 7 attached to the lower part and the base 8 on which the iron core and the like are placed
A hydraulic press consisting of and was used, and was carried out as follows. That is, an iron core is placed on the base 8 as shown in FIG. 1, and the pressing rod 7 is pushed down by the hydraulic cylinder 5 on the upper ring 4, and the space between the upper ring 4 and the lower ring 3 is adjusted by a straight ruler. The height H ₁ from the piece 2 to the front of the interval piece 2 of the second stage is measured, and the heights of 2 to 3 places around the iron core are measured with a straight edge ruler as well. A fan-shaped iron plate is inserted so that it is aligned at the same height H ₁ . Similarly, the heights H ₂ , H _n-1 , and
... The H _n measured ambient core 3-4 positions respectively, and insert the fan-shaped iron plate to a lower portion at each height, so that uniform the height of each core. As described above, conventionally, there is a problem in measurement accuracy and work efficiency in measuring the stacking thickness deviation of the stacked iron core because it is visually and manually calculated.

[Object of the Invention] The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a stacking thickness deviation measuring device that can easily measure the stacking thickness deviation and can be performed with high accuracy.

[Outline of the Invention] The present invention is configured as follows to achieve the above object. That is, in the first aspect of the invention, a base fixed to a support member on which a stacked iron core can be placed, a guide rail vertically arranged on the support member, and a radiation provided slidably on the guide rail are provided. Holders having a plurality of arms in the same direction and rod insertion holes near the ends of the arms, a drive device supported by the support member to move the holders up and down, and fixed to the lower part of the center position of the holders. A fixed-side spherical bearing, a conical seat fixed to the upper peripheral edge of the rod insertion hole of the holder, and a plurality of rods inserted so that the conical seats at one end of the conical seats come into contact with each other. A plate having a movable side spherical bearing fixedly supported by each rod and corresponding to the fixed side spherical bearing with a gap therebetween, and a plate formed on the lower surface side of the plate corresponding to each rod. When a pressing force in the direction of the base is applied to the holder by the driving device with a plurality of pressure blocks and the iron core of the base placed, the change in the distance between the plate and the holder is changed. And a linear detector for detecting. A second invention is a base fixed to a support member on which a stacked iron core can be mounted, a guide rail vertically arranged on the support member, and a guide rail slidably provided on the guide rail in a radial direction. A holder having a plurality of arms and a rod fixed to each arm, a drive device supported by the support member to move the holder up and down, and a fixed-side spherical bearing fixed to a lower portion of the center of the holder. A plate having a movable side spherical bearing fixedly supported by the rods and having a gap at a position corresponding to the fixed side spherical bearing so as to be able to abut against the fixed side spherical bearing, and a plurality of additional members formed on the lower surface of the plate. The pressure block and the end of each arm of the holder are fixed via a spherical seat at a position facing the plate, and the stacked iron core is placed on the base, and the holder is mounted on the holder by the drive device. Pressing force in the table direction When added is made of a pressure detector which outputs an electrical signal corresponding to the load generated between the stacked core.

Embodiments of the Invention Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view showing a schematic configuration of an embodiment of a stacking thickness deviation measuring device according to the present invention, and FIG. 2 is a II- of FIG.
FIG. 3 is a sectional view taken along line II and viewed in the direction of the arrow, and FIG. 3 is an enlarged sectional view of the measuring head portion of the same embodiment. As shown in the figure, a support member such as a column 25 has a horizontal base 25a at the bottom, and a guide rail in the vertical direction (vertical direction) to the peripheral surface.
The guide rail 10 is provided with a holder 9 slidably. As shown in FIG. 2, the holder 9 is provided with a hydraulic drive device 11 composed of, for example, a hydraulic cylinder and a piston substantially vertically at the center of the plate surface, and a plurality of holders 9 are provided in the radial direction (three in the figure). ) Arm 9a
Are formed at equal intervals. Although not shown, the hydraulic drive device 11 is fixed to the upper portion of the column 25. A fixed-side spherical bearing 12 having a spherical surface with a radius R about the center A of the upper surface of the circular core at the center of the lower part of the plate surface of the holder 9.
Is fixed. Vertical rod insertion holes 9b are formed at the ends of the arms 9a of the holder 9, and conical seats 19 are fixed to the upper peripheral edges of the rod insertion holes 9b. A rod 18 having a conical piece 17 on one end side is inserted into the conical seat 19 and the rod insertion hole 9b so that the conical piece 17 contacts the conical seat 19. A compression spring is provided around the lower end of the rod 18 protruding from the holder 9.
16 is inserted, and the lower end portion of the rod 18 is press-fitted into the rod insertion hole 14a provided in the plate 14, whereby the rod 18 is inserted into the plate 14.
Is fixed. The movable side spherical bearing 13 is located at the center of the upper surface of the plate 14 and at a position corresponding to the fixed side spherical bearing 12.
Is fixed. The lower surface of the plate 14 and the rod
The pressure block 15 is fixed at a position corresponding to 18.
A nut 20 is screwed onto the upper end of the rod 18, and by adjusting this, the conical piece 17 is moved up and down to change the value of the gap X between the fixed-side spherical bearing 12 and the movable-side spherical bearing 13. The nut 20 is adjusted so that the value of the gap X is, for example, 1 to 1.5 mm during non-pressure measurement.
A head portion of the holder 9 is in contact with the upper surface of the plate 14 and a linear detector 21 for detecting a change in distance between the plate 14 and the holder 9 such as a linear encoder or potentiometer is fixed. ing.

When the measurement head portion configured in this manner is pressed against the upper surface of the stacked iron core tilted due to the stacking thickness deviation, the pressure block 15 follows the upper surface of the iron core and compresses the compression spring 16 around the spherical bearings 12 and 13. By contrast, there is a difference in distance between the holder 9 and the holder 9 that fixes the fixed-side spherical bearing 12, and by reading this value with the linear detector 21, the value and direction of the stacking thickness deviation can be grasped. You can

Hereinafter, the operation of the stacking thickness deviation measuring device configured as described above will be described with reference to FIGS. 4 and 5. First
In the figure, in order to measure the deviation of the iron cores laminated up to the interval pieces 2 of one step to several steps, the iron cores are set on the lower ring 3 of the base 2, and the iron cores and the measuring head are set by, for example, a device not shown. After the concentric state, when the holder 9 is gradually lowered and pressed by the hydraulic drive device 11 in the direction shown by the arrow B in FIG. 4 with a pressing force of, for example, 10 to 20 tons, this force is divided into three equal parts. Then, the iron core is pressed through the plate 14 and the pressure block 15 via the compression springs 16. Since the pressing force in this case is via the compression spring 16 having a repulsive force of, for example, 10 to 15% of the measured pressing force (actually acting force), the force acting on each pressurizing block 15 is 1 to 3 tons. Becomes This transition of the pressurizing state takes a form extending from FIG. 3 to FIG. 4, and in the intermediate state, the pressurizing block 15 is not held and the conical piece 17 is separated from the conical seat 19. Just holder 9 and plate 14
Are connected by three compression springs 16. Therefore,
As shown in FIG.
Even if pressure is applied with a ton of force, the plate 14 easily tilts according to the tilt of the upper surface of the iron core. Thus, if the holder 9 is further lowered with the copy plate 14 tilted on the upper surface of each iron core, the compression spring 16 bends, and the fixed-side spherical bearing 12 fixed to the holder 9
And the movable side spherical bearing 13 mounted on the plate 14 are in contact with each other. At this time, since the spherical radii R of the spherical bearings 12 and 13 are values centered on the upper surface of the iron core, the lower surface of the pressure block 15 and the contact surface of the iron plate 1 slide with respect to the inclination of the plate 14 due to the inclination α of the iron core. Nothing. From this, the thrust of the holder 9 is the spherical bearing 1.
2, 13 are evenly added to the upper surface of the iron core at three points through a plate 14 and a pressure block 15. By reading the distance value between the holder 9 and the plate 14 at this time by the linear detector 21,
The direction of stacking thickness deviation and its correction value can be known instantly. According to the embodiment described above, the amount of inclination of the iron core due to the thickness deviation of the laminated iron core can be digitally known and the direction thereof can be accurately known.
The correction amount and the direction to be corrected can be easily known.

FIG. 6 is a sectional view showing a part of another embodiment of the stacking thickness deviation measuring device according to the present invention. In the above-described embodiment, the change in the distance between the holder 9 and the plate 14 is detected by the linear detector 21, but instead of this, the load generated between the piled-up iron core and the pressurizing block 15 by the pressure detector (load cell) 24. Is detected, and the stack thickness deviation of the iron core is indirectly measured from this. That is, the arm 9a of the holder 9 and the plate 14
A rod 18 provided at the end portion of the holder 9 is provided at the central position of these, and a fixed-side spherical bearing 22 is fixed to an end portion of the lower surface of the holder 9. It is provided. A pressure detector 24 that outputs an electric signal according to the load is fixed to the movable side spherical bearing 23, and
It is set so that the distance from 14 is Y≈X + 0.5. In this case, X is a gap between the fixed spherical bearing 12 and the movable spherical bearing 13. When the measuring head portion configured as described above is set as shown in FIG. 6 and the measuring head portion is pressed from the direction of arrow B by a hydraulic drive device (not shown), the plate 14 tilts following the tilt of the piled-up iron core. The pressurization block 15 that presses the protruding iron core portion rises and comes into contact with the pressure detector 24. By reading the output of the pressure detector 24 and converting the output into the iron core thickness, the direction of the plate thickness deviation and the correction value can be easily known.

[Effects of the Invention] According to the present invention described above, it is possible to provide a stacking thickness deviation measuring device in which the stacking thickness deviation of a stacked core can be measured easily and accurately.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a schematic configuration of an embodiment of a stacking thickness deviation measuring device according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is an enlarged cross-sectional view of the measuring head portion of the same embodiment, and FIGS. 4 and 5 are cross-sectional views showing a pressed state of the iron core having no stacking thickness deviation and an iron core having stacking thickness deviation in the same embodiment, respectively. 6 is a cross-sectional view showing a pressurized state, FIG. 6 is a cross-sectional view showing a part of another embodiment of the stacking thickness deviation measuring device according to the present invention, and FIG. 7 is a view for explaining a conventional stacking thickness deviation measuring method. It is a schematic block diagram. 1 ... Iron plate, 2 ... Spacing piece, 3 ... Lower ring, 9 ...
Holder, 10 …… Guide rail, 11 …… Cylinder rod, 12 …… Fixed side spherical bearing, 113 …… Movable side spherical bearing, 1
4 ... Plate, 15 ... Pressure block, 16 ... Compression spring, 17 ...
… Conical piece, 18 …… Rod, 19 …… Conical seat, 20 …… Nut, 21 …… Linear detector, 22 …… Fixed spherical bearing, 23…
… Movable spherical bearing, 24 …… Pressure detector, 25 …… Base 25a
A column with.

Claims (2)

[Claims] 1. A base on which a stacked iron core fixed to a support member can be mounted, a guide rail vertically arranged on the support member, and a plurality of guide rails slidably provided on the guide rail in a radial direction. A holder having individual arms and having rod insertion holes near the ends of each arm, a drive device supported by the support member to move the holder up and down, and a fixed side fixed to a lower portion of the center position of the holder. A spherical bearing, a conical seat fixed to the upper peripheral edge of the rod insertion hole of the holder, and a plurality of rods inserted so that the conical piece on one end side of each conical seat abuts,
A plate having a movable-side spherical bearing fixedly supported by each rod and having a gap at a position corresponding to the fixed-side spherical bearing,
A plurality of pressure blocks formed at positions corresponding to the rods on the lower surface side of the plate and a stacked iron core of the base are placed on the holder, and a pressing force is applied to the holder by the drive unit in the base direction. A stacking thickness deviation measuring device comprising a linear detector that detects a change in the distance between the plate and the holder when the above is added. 2. A base which is fixed substantially horizontally to a supporting member and on which a stacked iron core can be placed, a guide rail vertically arranged on the supporting member, and a radial direction slidably provided on the guide rail. A holder having a plurality of arms each having a rod fixed to each arm, a drive device supported by the support member to move the holder up and down, and a fixed-side spherical surface fixed to a lower portion of the center of the holder. A bearing, a plate having a movable-side spherical bearing fixedly supported by the rods and having a movable side spherical bearing with a gap so as to be able to abut at a position corresponding to the fixed-side spherical bearing, and a plurality of plates formed on the lower surface of the plate. The pressure block and the end of each arm of the holder are fixed via a spherical seat at a position facing the plate, and the holder is driven by the drive device while the circular piled iron core is placed on the base. On the base Pressure detector comprising a stacking thickness deviation measuring device that outputs an electric signal corresponding to the load generated between the stacked core when the added pressure of direction.