Correction processing device

Abstract

To provide a corrective machining apparatus capable of easily performing the corrective machining of an object to be machined even when there is an interfering object having a larger diameter than the object to be machined.SOLUTION: A corrective machining apparatus 11 includes: a support 12 installed on and fixed to a floor 10; a ring base 13 supported by the support 12; a rotary ring 14 rotatably supported by the ring base 13 and arranged on the outer peripheral side of a collector ring 4A; a ring motor 15 for rotating the rotary ring 14; and a tool 16 attached to the rotary ring 14, for correctively machining the collector ring 4A. The ring base 13 has such a structure as to be capable of being divided into a lower division base 34A and an upper division base 34B. The rotary ring 14 has such a structure as to be capable of being divided into a lower division ring 35A and an upper division ring 35B.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an apparatus for modifying a cylindrical or columnar workpiece. [Background technology]

[0002] Patent Document 1 discloses a device that is attached to a rotating shaft of a generator and modifies the surface of the rotating shaft (specifically, the sliding surface with a bearing). This modification device includes a fixed part on one side attached to one side of the rotating shaft in the longitudinal direction, a fixed part on the other side attached to the other side of the rotating shaft in the longitudinal direction, a rotating mechanism part that is arranged between the fixed part on one side and the fixed part on the other side and is capable of rotating around the rotating shaft, and a motor that rotates the rotating mechanism part via a gear mechanism. The rotating mechanism part includes a support part on one side arranged on one side of the rotating shaft in the longitudinal direction, a support part on the other side arranged on the other side of the rotating shaft in the longitudinal direction, a plurality of guides connected between the support part on one side and the support part on the other side, a traverse part that is movable along the plurality of guides (i.e., in the longitudinal direction of the rotating shaft), a motor that moves the traverse part in the longitudinal direction of the rotating shaft via a feed mechanism, and a cutting tool that is provided on the traverse part and modifies the surface of the rotating shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-18273 A (see Figs. 1 to 5) Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, there is a generator rotating shaft that includes, for example, a pair of collector rings and a fan that is located between the pair of collector rings and has a larger diameter than the collector rings. The surface of the collector ring is brushed, and therefore uneven wear may occur with long-term use. For this reason, there is a demand to modify the surface of the collector ring, for example, during periodic inspection. In particular, since it is time-consuming to remove the rotating shaft from the generator, there is a demand to modify the surface of the collector ring while the rotating shaft of the generator is still installed.

[0005] As a configuration of the device for modifying the collector ring while the rotating shaft of the generator is in a stationary state, it is possible to configure the device to modify the collector ring with a stationary tool while rotating the rotating shaft of the generator. However, in this case, the collector ring cannot be modified unless the generator is in an operable state, for example, during a periodic inspection. In other words, the timing for modifying the collector ring is limited, and it is difficult to secure a schedule (for example, several days) for the modification. Alternatively, the periodic inspection period may be extended in order to secure a schedule for modifying the collector ring, which may delay the return to operation of the generator.

[0006] Thus, as a configuration of a device for modifying the collector ring while the rotating shaft of the generator is in a stationary state, a configuration in which a tool is rotated as in Patent Document 1 is conceivable. However, as described above, if there is a fan (interfering object) with a larger diameter than the collector ring (object to be processed), it is difficult to attach the device to the rotating shaft as in Patent Document 1. Alternatively, it is difficult to modify both collector rings.

[0007] The present invention has been made in consideration of the above circumstances, and one of its objects is to easily perform correction machining of a workpiece even when an interfering object having a larger diameter than the workpiece is present. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a generator having a rotating shaft that is in a stationary state. The surface of a cylindrical or columnar workpiece attached to a rotating shaft is In the correction processing device for correction processing, a support body is installed and fixed on a floor, a ring table is supported by the support body, and a ring table is rotatably supported by the ring table, The above The present invention comprises a rotating ring disposed on the outer periphery of a workpiece, a ring motor for rotating the rotating ring, and a tool attached to the rotating ring for modifying the workpiece, the ring base being structured so as to be separable into a lower split base and an upper split base, and the rotating ring being structured so as to be separable into a lower split ring and an upper split ring, the support includes a first moving mechanism that moves the ring base in a first horizontal direction perpendicular to a rotation center line of the rotating ring, and a second moving mechanism that moves the ring base in a second horizontal direction parallel to the rotation center line of the rotating ring; The lower divided base is The lowest position in the vertical direction of the lower divided stand is The support Lower than the highest point in the vertical direction The support is supported in this state. Effect of the Invention

[0009] According to the present invention, even when there is an interfering object having a larger diameter than the workpiece, correction machining of the workpiece can be easily performed. [Brief description of the drawings]

[0010] [Figure 1] 1 is a front view showing the structure of a generator, which is a device equipped with an object to be processed according to an embodiment of the present invention. [Diagram 2] 1 is a front view showing a structure of a correction processing device according to an embodiment of the present invention; [Diagram 3] 1 is a top view showing a structure of a correction processing device according to an embodiment of the present invention; [Figure 4] 1 is a side view showing a structure of a correction processing device according to an embodiment of the present invention; [Diagram 5] 1 is a side view showing the structure of a correction processing device according to an embodiment of the present invention, illustrating a state in which a ring base and a rotating ring are separated. FIG. [Figure 6] FIG. 11 is a front view showing a structure of a correction processing device according to a modified example of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] An embodiment of the present invention will be described with reference to FIGS.

[0012] FIG. 1 is a front view showing the structure of a generator, which is an apparatus equipped with a workpiece according to this embodiment. FIG. 2 is a front view showing the structure of the correction processing device according to this embodiment (as viewed from the direction of arrow II in FIG. 3). FIG. 3 is a top view showing the structure of the correction processing device according to this embodiment (as viewed from the direction of arrow III in FIG. 2). FIG. 4 is a side view showing the structure of the correction processing device according to this embodiment (as viewed from the direction of arrow III in FIG. 4). 3 5 is a view seen from the direction of an arrow IV in FIG. 5. FIG. 5 is a side view showing the structure of the correction processing device of this embodiment, showing a state in which the ring base and the rotating ring are separated.

[0013] The device of this embodiment is a generator 1 installed on a floor 10. The generator 1 includes a rotating shaft 2 extending horizontally, a rotor coil (not shown) provided on the rotating shaft 2, a stator frame 3, and a stator coil (not shown) provided on the stator frame 3 and arranged on the outer periphery of the rotor. The rotating shaft 2 of the generator 1 includes a pair of collector rings 4A, 4B, and a fan 5 located between the collector rings 4A, 4B and having a larger diameter than the collector rings 4A, 4B.

[0014] The correction processing device 11 of this embodiment corrects the collector rings 4A, 4B (cylindrical workpieces) while the rotating shaft 2 of the generator 1 remains in an installed state. The correction processing device 11 includes a support 12 installed and fixed on a floor 10, a ring stand 13 supported by the support 12, a rotating ring 14 rotatably supported by the ring stand 13 and disposed on the outer periphery of the collector ring 4A or 4B, a ring motor 15 that rotates the rotating ring 14, and a tool 16 attached to the rotating ring 14 to correct the collector ring 4A or 4B.

[0015] The support body 12 comprises a base plate 17 installed on the floor 10 and fixed using multiple fasteners (not shown), a bed 18 installed on the upper side of the base plate 17, a level adjustment mechanism (described in detail below) for adjusting the level of the bed 18, a position adjustment mechanism (described in detail below) for adjusting the position of the bed 18, and multiple clamps 20 (four in this embodiment) for fixing the bed 18 to the frame portion 19 of the base plate 17.

[0016] The level adjustment mechanism has a plurality of (nine in this embodiment) screw holes formed in the bed 18 and penetrating in the vertical direction, and a plurality of (nine in this embodiment) level adjustment screws 21 screwed into the plurality of screw holes, respectively. The length of the protruding portion of the level adjustment screw 21 protruding from the lower surface of the bed 18 and abutting against the upper surface of the base plate 17 is adjustable. This makes it possible to adjust the level of the bed 18 so that the rotation center line L2 of the rotating ring 14 is at the same level as the rotation center line L1 of the rotating shaft 2 of the generator 1.

[0017] The position adjustment mechanism has a plurality of (two in this embodiment) first screw holes formed on the front side (lower side in Figure 3) of the frame portion 19 of the base plate 17 and penetrating in the front-to-rear direction (up-down direction in Figure 3), a plurality of (two in this embodiment) front push screws 22A that screw into each of the first screw holes, a plurality of (two in this embodiment) second screw holes formed on the rear side (upper side in Figure 3) of the frame portion 19 of the base plate 17 and penetrating in the front-to-rear direction, and a plurality of (two in this embodiment) rear push screws 22B that screw into each of the second screw holes.

[0018] The position adjustment mechanism also includes a plurality of (two in this embodiment) third screw holes formed on the right side (right side in FIG. 3) of the frame portion 19 of the base plate 17 and penetrating in the left-right direction (left-right direction in FIG. 3), a plurality of (two in this embodiment) right push screws 22C screwed into the third screw holes, a plurality of (two in this embodiment) fourth screw holes formed on the right side of the frame portion 19 of the base plate 17 and penetrating in the left-right direction, a plurality of (two in this embodiment) fifth screw holes formed in the right part of the bed 18 corresponding to the fourth screw holes, and a plurality of (two in this embodiment) right pull screws 23 screwed into both the fourth screw holes and the fifth screw holes. The reason for providing the right pull screws 23 instead of the left push screws is to avoid interference with the stator frame 3 of the generator 1 (see FIG. 2).

[0019] Then, the push screw 22A protrudes from the frame portion 19 of the base plate 17 and pushes in the front surface of the bed 18, the push screw 22B protrudes from the frame portion 19 of the base plate 17 and pushes in the rear surface of the bed 18, the push screw 22C protrudes from the frame portion 19 of the base plate 17 and pushes in the right surface of the bed 18, or the pull screw 23 pulls in the right side of the bed 18. This makes it possible to adjust the position of the bed 18 so that the rotation center line L2 of the rotating ring 14 is parallel to the rotation center line L1 of the rotating shaft 2 of the generator 1.

[0020] The support 12 is provided above the bed 18 and further includes a saddle 24 that supports the ring base 13, a movement mechanism 25A that moves the saddle 24 in the front-to-back direction relative to the bed 18, and a movement mechanism 25B that moves the ring base 13 in the left-to-right direction relative to the saddle 24.

[0021] On the upper side of the bed 18, a plurality of rows (three rows in this embodiment) of protrusions 26 extending in the front-rear direction are formed, and on the lower side of the saddle 24, a plurality of rows (three rows in this embodiment) of grooves 27 corresponding to the plurality of rows of protrusions 26 are formed. This allows the saddle 24 to move in the front-rear direction relative to the bed 18. The movement mechanism 25A has a ball screw 28A extending in the front-rear direction and a movement motor 29A that rotates the ball screw 28A. The ball screw 28A is composed of a screw shaft and a nut that screws onto the screw shaft via a plurality of balls, and the nut and the saddle 24 are connected. Then, the saddle 24 moves in the front-rear direction with the rotation of the ball screw 28A. As a result, the ring base 13 moves in the front-rear direction (in other words, in the horizontal direction perpendicular to the rotation center line L2 of the rotating ring 14).

[0022] The saddle 24 is provided with a plurality of rails 30 (three in this embodiment) extending in the left-right direction and a plurality of sliders 31 (three in this embodiment) that can move along the rails 30, and the plurality of sliders 31 are connected to the ring base 13. This allows the ring base 13 to move in the left-right direction relative to the saddle 24. The movement mechanism 25B has a ball screw 28B extending in the left-right direction and a motor 29B that rotates the ball screw 28B. The ball screw 28B is composed of a screw shaft and a nut that screws onto the screw shaft via a plurality of balls, and the nut is connected to the ring base 13. Then, as the ball screw 28B rotates, the ring base 13 moves in the left-right direction (in other words, in the horizontal direction parallel to the rotation center line L2 of the rotating ring 14).

[0023] The rotating ring 14 is rotatably supported by a plurality of bearings 32 (eight in this embodiment) spaced apart in the circumferential direction of the ring base 13. The ring motor 15 rotates the rotating ring 14 via a gear mechanism (not shown). The rotating ring 14 is provided with a tool holder 33 to which a tool 16 can be detachably attached. The tool holder 33 makes it possible to adjust the position of the tool 16 in the radial direction of the rotating ring 14. The tool 16 is, for example, a cutting tool, a polishing tool, or a burnishing tool, and is used to modify the surface of the collector ring 4A or 4B.

[0024] The most significant feature of this embodiment is that the ring base 13 and the rotating ring 14 are each structured to be separable into a lower portion and an upper portion. More specifically, the ring base 13 is structured to be separable into a lower split base 34A and an upper split base 34B at a split line inclined relative to the horizontal direction. The lower split base 34A is connected to the above-mentioned multiple sliders and nuts. The upper split base 34B is connected to the lower split base 34A using a first connecting screw (not shown). The rotating ring 14 is structured to be separable into a lower split ring 35A and an upper split ring 35B at the same split line as the ring base 13. The above-mentioned tool holder 33 is provided on the upper split ring 35B. The upper split ring 35B is connected to the lower split ring 35A using a second connecting screw (not shown).

[0025] Next, the operation and effects of this embodiment will be described.

[0026] The correction processing device 11 corrects the collector rings 4A, 4B while the rotating shaft 2 of the generator 1 remains installed. In the preparation stage, the support body 12 is installed and fixed on the floor 10. Then, the ring base 13, the rotating ring 14, etc. are assembled so that their positions match those of the collector ring 4A. Then, the level and position of the bed 18 that constitutes the support body 12 are adjusted to adjust the level and position of the rotation center line L2 of the rotating ring 14. Then, the rotating ring 14 is rotated to correct the collector ring 4A.

[0027] When the correction processing of the collector ring 4A is completed, the rotation of the rotating ring 14 is stopped using a known stopper mechanism so that the dividing line of the rotating ring 14 and the dividing line of the ring base 13 are aligned. Then, the lower split base 34A and the split ring 35A are connected using a first connecting jig (not shown), and the upper split base 34B and the split ring 35B are connected using a second connecting jig (not shown). Then, the first and second connecting screws are removed, and the split base 34A and the split base 34B are separated, and the split ring 35A and the split ring 35B are separated. Then, the upper split base 34B and the split ring 35B are lifted, and then the lower split base 34A and the split ring 35A are moved to align with the position of the collector ring 4B.

[0028] At this time, as shown in Figures 4 and 5, if the outer diameter of the fan 5 is smaller than the inner diameter of the lower split ring 35A, the lower split table 34A and split ring 35A can be moved only to the left. Since the upper split table 34B and split ring 35B are separated, interference between the split ring 35B and the tool holder 33 and the fan 5 can be avoided. On the other hand, if the outer diameter of the fan 5 is slightly larger than the inner diameter of the lower split ring 35A, the lower split table 34A and split ring 35B can be moved in the order of front, left, and rear. Since the dividing lines of the ring table 13 and the rotating ring 14 are inclined with respect to the horizontal direction, interference between the split table 34A and split ring 35A and the collector ring 4A can be easily avoided.

[0029] Once the positions of the lower split base 34A and split ring 35A are aligned with the position of collector ring 4B, the upper split base 34B and split ring 35B are hung down, and the split base 34A and split base 34B are connected using a first connecting screw, and the split ring 35A and split ring 35B are connected using a second connecting screw. Then, the first and second connecting jigs are removed, and the lower split base 34A and split ring 35A are separated, and the lower split base 34B and split ring 35B are separated. Then, the rotating ring 14 is rotated to perform correction processing on the collector ring 4B.

[0030] As described above, in this embodiment, even if the fan 5 having a diameter larger than the collector rings 4A, 4B is present, the collector rings 4A, 4B can be easily corrected.

[0031] In the above embodiment, the support 12 has been described as having a level adjustment mechanism for adjusting the level of the bed 18, but the present invention is not limited to this, and a height raising mechanism for raising the level of the bed 18 may be further attached. Such a modified example will be described with reference to Fig. 6. Fig. 6 is a front view showing the structure of the correction processing device of this modified example. In this modified example, parts equivalent to those of the above embodiment are given the same reference numerals, and descriptions thereof will be omitted as appropriate.

[0032] The height raising mechanism of this modification has a plurality of (nine in this modification) bed raising tables 41, a plurality of (six in this modification) screw raising tables 42, and a plurality of (four in this modification) clamp raising tables 43. The nine bed raising tables 41 are attached between the upper surface of the base plate 17 and the lower surface of the bed 18 at positions corresponding to the nine level adjustment screws 21, respectively. The four screw raising tables 42 are attached to the upper side of the frame part 19 of the base plate 17 at positions corresponding to the two front push screws 22A and the two rear push screws 22B, respectively. The two screw raising tables 42 are attached to the upper side of the frame part 19 of the base plate 17 at positions corresponding to the two sets of right push screws 22C and right pull screws 23, respectively. Each screw raising table 42 has a screw hole into which the front push screw 22A, the rear push screw 22B, the right push screw 22C, or the right pull screw 23 is screwed. The four clamp lifting tables 43 are attached to the upper side of the frame portion 19 of the base plate 17 at positions corresponding to the clamps 20 .

[0033] According to this modification, by changing the heights of the bed lifting table 41, the screw lifting table 42, and the clamp lifting table 43, it is possible to accommodate various heights of the rotation shaft 2.

[0034] In the above embodiment, the modification device 11 is described as modifying the surfaces of the collector rings 4A and 4B (cylindrical workpieces), but the present invention is not limited to this. For example, the modification device 11 may modify the surface of the rotating shaft 2 (cylindrical workpiece). [Explanation of symbols]

[0035] 4A, 4B Collector ring 10 Beds 11 Correction processing equipment 12 Support 13 Ring stand 14 Rotating Ring 15 Ring Motor 16 Tools 25A,25B Moving mechanism 34A,34B splitting stand 35A, 35B Split ring

Claims

1. A modification processing device for modifying a surface of a cylindrical or columnar workpiece attached to a rotating shaft of a generator while the rotating shaft is in a stationary state, A support that is fixed to the floor; A ring base supported by the support; a rotating ring rotatably supported by the ring base and disposed on an outer circumferential side of the workpiece; A ring motor that rotates the rotating ring; a tool attached to the rotating ring for modifying the workpiece; The ring base is structured so as to be separable into a lower division base and an upper division base, The rotating ring has a structure that can be separated into a lower split ring and an upper split ring, the support includes a first moving mechanism that moves the ring base in a first horizontal direction perpendicular to a rotation center line of the rotating ring, and a second moving mechanism that moves the ring base in a second horizontal direction parallel to the rotation center line of the rotating ring; The correction machining device is characterized in that the lower divided table is supported by the support body in a state where the vertical lowest position of the lower divided table is lower than the vertical highest position of the support body.

2. In the correction processing device according to claim 1, The ring base is structured so as to be separable into the lower division base and the upper division base at a division line inclined with respect to the horizontal direction, The correction processing device is characterized in that the rotating ring has a structure capable of being divided into the lower split ring and the upper split ring along a dividing line that is inclined with respect to the horizontal direction.

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