JP2019130621A - Gear wheel grinding device - Google Patents

Abstract

To provide a gear wheel grinding device, which can be downsized while securing a space enough to carry a work-piece.SOLUTION: The gear wheel grinding device comprises: a work-table 3 that supports a work-piece W on a bed 2 rotatably; a grindstone support part that supports a grindstone for grinding the work-piece W movably with respect to the work-table 3; a tail stock support part 7 that supports movably a tail stock that presses the work-piece W supported by the work-table 3 from above in a vertical direction; and a work-piece carrying part 8 that moves the work-piece W between a work-piece processing position X at which the work-piece W can be arranged on the work-table 3 and a work-piece exchanging position Y, a position at the opposite side of the work-piece processing position X across the tail-stock support part 7, at which the processed work-piece W can be exchanged with an unprocessed work-piece W. In the tail stock support part 7 is formed a carrying opening part 70 through which the work-piece processing position X is communicated with the work-piece exchanging position Y so that the work-piece W can pass.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a gear grinding apparatus.

  Gears are required to have high processing accuracy depending on the purpose of use. A gear that requires high machining accuracy is manufactured by grinding a roughly machined workpiece with a grindstone.

  As an apparatus for grinding a gear, Patent Literature 1 describes a gear grinding machine. This gear grinding machine grinds a workpiece by relatively rotating the screw-shaped grindstone and the workpiece in mesh. The bed of the gear grinding machine is provided with a column that movably supports a rotating grindstone. The bed is provided with a work table that rotatably supports the work so as to face the grindstone. A counter column is provided at a position facing the column across the work table. The counter column is formed in a single column shape extending in the vertical direction from the bed.

  The workpiece is ground by a grindstone after being placed on the workpiece table. Then, after the grinding is completed, it is removed from the work table. Various workpiece transfer mechanisms have been proposed in order to continuously grind a plurality of workpieces. As an example, a swivel transfer method can be cited as a method that can transfer a workpiece at a higher speed. In the swivel transfer device, the work can be moved by turning around the work turning axis between the work machining position and the work exchange position. Further, in the swivel transfer device, when processing (grinding) a workpiece at the workpiece processing position, the processed workpiece is removed and the unprocessed workpiece is attached at the workpiece replacement position.

  The counter column described in Patent Document 1 is provided with a transport mechanism for transporting the work to the work table by turning the work around the counter column. Further, the counter column is provided with a dressing device for dressing the grindstone and a tailstock (tail presser) for pressing the workpiece from above in the vertical direction.

JP-A-2005-111600

  By the way, in the gear grinding machine as described above, a space for moving the work must be secured around the counter column. In the case of the swivel transfer device, a space for enabling the work to turn around the work turning axis corresponds to the space. On the other hand, the counter column is required to have a structure that does not bend as the pressing force is applied to the work by the tailstock. In particular, when the counter column is in the form of a single column, it is necessary to increase the cross-sectional shape as higher grinding conditions (accuracy, time, etc.) are required. In this case, securing the space around the counter column increases the size of the entire apparatus. In place of the swivel transfer method, adopting a line transfer method that transfers the workpiece machining position and workpiece exchange position directly or on a rail with multiple bending points not only leads to a reduction in processing speed, but eventually However, there is no change in that the conveyance path needs to be provided around the counter column.

  The present invention has been made to meet the above-described problems, and an object of the present invention is to provide a gear grinding apparatus that can be downsized while securing a space for conveying a workpiece.

The present invention employs the following means in order to solve the above problems.
The gear grinding apparatus according to the first aspect of the present invention is configured to rotationally drive a bed, a work table that rotatably supports a work to be a gear on the bed, a grindstone for grinding the work, and the grindstone. , A grindstone support unit that is movably supported on the bed with respect to the work table, a tail stock that holds the work supported by the work table from above in a vertical direction, and the tail stock that moves on the bed. A tail stock support that supports the workpiece, a workpiece machining position where the workpiece can be placed on the work table, and a workpiece that has been machined at a position opposite to the workpiece machining position across the tail stock support. A workpiece transfer section for moving the workpiece between an unprocessed workpiece and a replaceable workpiece replacement position, The stock support portion, wherein the workpiece processing position communicates the work replacement position, the workpiece transport opening is formed can pass.

  According to such a configuration, it is possible to suppress a necessary area accompanying the workpiece conveyance with respect to the bed, compared to the case of conveying the workpiece around the tailstock support portion.

  Moreover, in the gear grinding apparatus according to the second aspect of the present invention, in the first aspect, the work transport unit includes a rotary shaft main body centering on a work turning shaft extending in a vertical direction, and one end of the rotary shaft main body. A rotary shaft drive unit that is connected to the rotary shaft and moves the rotary shaft main body around the workpiece turning axis and in a vertical direction, and is connected to the other end of the rotary shaft main body and is orthogonal to the extending direction of the rotary shaft main body. A grip support portion extending in a direction, and a pair of grip devices connected to the grip support portion and capable of attaching and detaching the workpiece, wherein the one grip device is located at the workpiece processing position. When arranged, the other gripping device is fixed to the grip support part so as to be arranged at the work exchange position, and the work pivot shaft is arranged in the transfer opening. It is, the workpiece transfer unit, wherein between the workpiece machining position and the work replacement position, it may be possible to move the workpiece by pivoting around the workpiece pivot axis.

  By adopting such a configuration, it is possible to realize an improvement in the workpiece conveyance speed with a simple and small mechanism.

  Further, in the gear grinding apparatus according to the third aspect of the present invention, in the first or second aspect, the rotational phase relationship is set in the transfer opening of the tailstock support part and the work and the grindstone can mesh with each other. There may be provided a tooth aligning device for causing the work table to perform such a tooth aligning operation.

  By setting it as such a structure, the accessibility to the external gearing apparatus improves. Thereby, the improvement of workability | operativity at the time of the maintenance of a tooth alignment apparatus is realizable by a compact system.

  Moreover, in the gear grinding apparatus according to the fourth aspect of the present invention, in any one of the first to third aspects, the tailstock support portion extends upward in the vertical direction with respect to the bed, and the work table A pair of support legs disposed in a direction crossing the moving direction of the grindstone support part so as to sandwich the support leg, and a support leg upper connecting part that connects the pair of support legs above in the vertical direction, The transfer opening may be defined by at least the pair of support legs and the support leg upper connecting part, and may be formed to communicate the workpiece machining position and the workpiece exchange position.

  By setting it as such a structure, the rigidity as a tail stock support part can be improved because the support leg is connected by the support leg upper connection part. As a result, it is possible to relatively reduce the size of the support leg.

  Further, in the gear grinding apparatus according to the fifth aspect of the present invention, in the fourth aspect, the tailstock support part has a support leg lower connecting part that connects the pair of support legs in the vertical direction, The transport opening may be further defined by the support leg lower connecting portion.

  With such a configuration, the load generated by the weight of the tail stock support portion and the pressing force of the work on the work table by the tail stock can be distributed and supported on the bed. For this reason, since it is not necessary to increase the rigidity of the bed as in the prior art, the entire apparatus can be reduced in size.

  Further, in the gear grinding apparatus according to the sixth aspect of the present invention, in any one of the first to fifth aspects, the lower part in the vertical direction of the opening portion on the workpiece machining position side of the transfer opening is closed. A fixed shutter unit fixed to a movable shutter unit, and a movable shutter unit that is movably mounted in a vertical direction at a position closer to the work table than the fixed shutter unit, the fixed shutter unit and the movable shutter unit Accordingly, it may be possible to close the opening portion of the transfer opening on the workpiece processing position side.

  By setting it as such a structure, a gear alignment apparatus can be protected from the coolant which disperses at the time of a workpiece | work processing with a fixed shutter part and a movable shutter part. Moreover, a part of opening part by the side of the workpiece | work processing position of a conveyance opening part is covered with the fixed shutter part. Therefore, the movable time of the movable shutter portion can be shortened as compared with the case where the entire opening portion on the workpiece machining position side of the conveyance opening portion is covered with the movable shutter portion. Thereby, cycle time can be shortened.

  ADVANTAGE OF THE INVENTION According to this invention, size reduction can be achieved, ensuring the space for conveying a workpiece | work.

It is a side view which shows typically the gear grinding apparatus in this embodiment. It is a top view which shows typically the gear grinding apparatus in this embodiment. It is a perspective view which shows the tail stock support part in this embodiment. It is IV-IV sectional drawing in FIG. It is VV sectional drawing in FIG. It is principal part sectional drawing which shows the worktable vicinity in this embodiment. It is a top view which shows typically the workpiece | work turning part of the gear grinding apparatus in this embodiment.

Embodiments according to the present invention will be described below with reference to FIGS.
The gear grinding apparatus 1 is a grinding apparatus that grinds a workpiece W serving as a gear with a grindstone T. In the gear grinding apparatus 1, the workpiece W is ground by bringing the grindstone T and the workpiece W into contact with each other while being rotated synchronously. The workpiece W is an object to be processed that is formed in a disk shape or a cylindrical shape, for example. The workpiece W is ground on the outer peripheral surface and formed teeth by the grindstone T.

  The grindstone T is formed in a cylindrical shape. On the outer peripheral surface of the grindstone T, helical grinding teeth corresponding to a desired gear tooth shape are formed.

  As shown in FIGS. 1, 2, and 6, the gear grinding device 1 includes a bed 2, a work table 3, a grindstone support portion 4, a dressing device 5, a tailstock 6, and a tailstock support portion 7. , A dressing device moving unit 55, a tail stock moving unit 65, a workpiece turning conveyance unit (work conveyance unit) 8, and a tooth matching device 9.

  As shown in FIG. 1, the bed 2 is a pedestal installed on the floor surface. A work table 3, a grindstone support portion 4, and a tail stock support portion 7 are attached to the bed 2.

  The work table 3 supports the work W on the bed 2 so as to be rotatable. The work table 3 is attached to the bed 2 at a position where the work W can face the grindstone T. The work table 3 is rotatable with respect to the bed 2 around a table axis O3 extending in the vertical direction Dv.

  The grindstone support unit 4 rotates the grindstone T that grinds the workpiece W. The grindstone support unit 4 supports the grindstone T so as to be movable with respect to the work table 3 on the bed 2. As shown in FIG. 2, the grindstone support portion 4 includes a grindstone support portion main body 41, a grindstone moving portion 42, and a grindstone drive portion 43.

  The grindstone support body 41 is disposed on the bed 2 so as to be separated from the work table 3. The grindstone support portion main body 41 can move the grindstone T in the horizontal direction with respect to the work table 3. Here, the moving direction of the grindstone support body 41 with respect to the bed 2 is referred to as a first direction D1. The first direction D <b> 1 is one of the horizontal directions and is the longitudinal direction of the bed 2. Therefore, the grindstone support portion main body 41 adjusts the position of the grindstone T in the first direction D <b> 1 with respect to the work table 3.

  The grindstone moving part 42 is movable in the vertical direction Dv with respect to the grindstone support part main body 41. Therefore, the grindstone moving unit 42 adjusts the position of the grindstone T in the vertical direction Dv with respect to the work table 3.

  The grindstone drive unit 43 is movable in a horizontal direction (second direction D2) perpendicular to the first direction D1 with respect to the grindstone moving unit 42. The second direction D2 is a direction orthogonal to the first direction D1 and the vertical direction Dv and is the width direction of the bed 2. A grindstone T is detachably attached to the grindstone driving unit 43. Further, the grindstone driving unit 43 moves the grindstone T around the grindstone rotation axis O4 extending in the direction intersecting the first direction D1 by the power of a drive source such as a motor. Therefore, the grindstone driving unit 43 adjusts the position of the grindstone T in the second direction D2 with respect to the work table 3 while rotating the grindstone T.

  As shown in FIGS. 1 and 2, the dressing device 5 can dress the grindstone T. The dressing device 5 has a dressing tool that is rotationally driven. The dressing device 5 sharpens the grindstone T by bringing the dressing tool into contact with the grindstone T. The dressing device 5 is supported via the dressing device moving portion 55 so as to be movable in the vertical direction Dv with respect to the tailstock support portion 7.

  The tail stock support portion 7 supports the tail stock 6 and the dressing device 5 so as to be movable in the vertical direction Dv. The tailstock support portion 7 is disposed at a position away from the grindstone support portion 4 in the first direction D1 with the work table 3 interposed therebetween. As shown in FIGS. 3 to 6, the tailstock support portion 7 includes a pair of support legs 71, a support leg upper connection portion 72, a top plate 713, a support leg lower connection portion 73, and a fixed plate portion 74. The first guide rail 75, the second guide rail 76, the upper reinforcing portion 77, the fixed shutter portion 78, and the movable shutter portion 79.

  The tail stock 6 presses the workpiece W against the workpiece table 3 from above in the vertical direction Dv on the workpiece W supported by the workpiece table 3.

  The support leg 71 includes a support leg main body 711 and a support leg reinforcement 712. The support leg main body 711 has a rectangular flat plate shape. The support leg main body 711 is arranged so that the widest surface faces the second direction D2. The pair of support legs 71 (71a, 71b) is fixed to the bed 2 via the support leg lower connecting portion 73. With such a configuration, the load generated by the weight of the tail stock support portion and the pressing force of the work on the work table by the tail stock can be distributed and supported on the bed. Each support leg 71 extends in the vertical direction Dv. In the second direction D2, the support legs 71 are arranged so as to be substantially equidistant from a plane including the table axis O3 and a workpiece turning axis O5 described later. In addition, the end surface in one second direction D2 of the support leg 71 is disposed closer to the plane than the end surface in the second direction D2 of the grindstone driving unit 43.

  The support leg upper connecting portion 72 has a rectangular flat plate shape. The support leg upper connecting portion 72 has a widest surface arranged in the first direction D1. Both end surfaces in the vertical direction of the support leg upper connecting portion 72 are respectively connected to support leg reinforcing portions 712 disposed on the opposite side of the grindstone support portion 4.

  The top plate 713 has a rectangular flat plate shape. The top plate 713 has the widest surface arranged in the vertical direction Dv. The lower surface of the top plate 713 in the vertical direction Dv is connected to the upper ends of the support legs 71 and the support leg upper connecting portions 72 in the vertical direction Dv. Thereby, the support leg 71 and the top plate 713 have a gate shape.

  The support leg lower connecting portion 73 has a rectangular flat plate shape. The support leg lower connecting portion 73 has a widest surface arranged in the vertical direction Dv. The support leg lower connecting portion 73 is fixed to the bed upper surface 20. Thereby, the support leg lower connecting portion 73 fixes the support leg 71 to the bed 2. As shown in FIG. 5, a tooth aligning device 9 to be described later is fixed to the support leg lower connecting portion 73.

  As shown in FIG. 3, a transport opening 70 is formed in the tailstock support portion 7. The transfer opening 70 is an opening formed in the tail stock support 7. The transport opening 70 is a space surrounded by a pair of support legs 71, a support leg lower connecting part 73, and a fixed plate part 74. The conveyance opening 70 is an opening formed so as to penetrate the tailstock support portion 7 in the first direction D1. The transfer opening 70 is formed with a size that allows the workpiece W to pass therethrough.

  The workpiece machining position X is a position where the workpiece W can be set on the workpiece table 3 as shown in FIG. At the workpiece machining position X, the workpiece W is ground by the grindstone T. The workpiece exchange position Y is a position where the machined workpiece W can be exchanged with an unmachined workpiece W. The workpiece exchange position Y is a position on the opposite side of the grindstone support 4 with the tailstock support 7 interposed therebetween. That is, the workpiece exchange position Y is a position where the vertical direction Dv and the second direction D2 are the same as the workpiece machining position X, and are separated from the first direction D1. Therefore, in the tail stock support portion 7, the transfer opening 70 is formed so as to communicate the workpiece machining position X and the workpiece exchange position Y, which are positions separated in the first direction D1.

  As shown in FIG. 3, the fixed plate portion 74 connects the pair of support legs 71 between the support leg upper connecting portion 72 and the support leg lower connecting portion 73. The fixed plate portion 74 is connected to the support leg 71 and the support leg upper connecting portion 72. The fixed plate portion 74 has a rectangular plate shape with the widest surface facing the vertical direction Dv. The fixed plate portion 74 is formed with a shaft insertion hole 741 through which a rotation shaft main body 81 of the workpiece turning conveyance portion 8 described later is inserted in the vicinity of the center in the second direction D2.

  The first guide rail 75 is fixed to the side of the support leg upper connecting portion 72 facing the grindstone support portion 4 side. The first guide rail 75 extends linearly in the vertical direction Dv. The first guide rails 75 are composed of two pieces, and each first guide rail 75 is equally spaced with respect to a line segment that connects the center of the workpiece turning position X and the workpiece replacement position Y in the horizontal plane of the workpiece turning conveyance unit 8 to be described later. It arrange | positions so that it may become spaced apart in the 2nd direction D2.

  The second guide rail 76 is fixed to the side of the support leg upper connecting portion 72 facing the grindstone support portion 4 side. The second guide rail 76 extends linearly in the vertical direction Dv. The second guide rails 76 are composed of two pieces, and each second guide rail 76 is equally spaced with respect to a line segment connecting the center of the workpiece turning position X and the workpiece exchange position Y in the horizontal plane of the workpiece swivel conveyance unit 8 to be described later. In such a manner, they are spaced apart in the second direction D2. The pair of second guide rails 76 is disposed so as to sandwich the pair of first guide rails 75 inside the second direction D2.

  As shown in FIGS. 5 and 6, the fixed shutter portion 78 partially closes the lower portion in the vertical direction Dv of the opening portion on the workpiece machining position X side of the transfer opening 70. The fixed shutter portion 78 is fixed to the support leg lower connecting portion 73 at a position closer to the work table 3 than an attachment position of a tooth alignment device 9 described later. The fixed shutter portion 78 extends upward in the vertical direction Dv from the surface of the support leg lower connecting portion 73 facing upward in the vertical direction. The fixed shutter portion 78 has a rectangular flat plate shape.

  As shown in FIG. 6, the movable shutter portion 79 can block the opening portion on the workpiece machining position X side of the conveyance opening portion 70 together with the fixed shutter portion 78. As a result, the movable shutter portion 79, together with the fixed shutter portion 78, prevents the coolant (cooling agent such as grinding oil) scattered during processing of the workpiece W from entering the transport opening 70. The movable shutter part 79 partially closes or opens the upper part in the vertical direction Dv of the opening part on the workpiece machining position X side of the conveyance opening part 70. The movable shutter unit 79 is provided at a position closer to the work table 3 than the fixed shutter unit 78. The movable shutter portion 79 is attached to the support leg upper coupling portion 72 so as to be movable in the vertical direction Dv. The movable shutter portion 79 is movable to a position where the opening portion on the workpiece machining position X side of the transfer opening 70 is sufficiently closed. The movable shutter portion 79 has a bellows shape, and is movable so as to extend downward from the support leg upper coupling portion 72 in the vertical direction Dv. In a state where the conveyance opening 70 is closed by the fixed shutter portion 78 and the movable shutter portion 79, the position of the tip of the movable shutter portion 79 and the tip of the fixed shutter portion 78 overlap in the first direction D1.

  The tail stock moving unit 65 supports the tail stock 6 so as to be movable in the vertical direction Dv. The tailstock moving part 65 is attached to the support leg upper connecting part 72 through the first guide rail 75 so as to be movable in the vertical direction Dv. The tail stock moving unit 65 is moved with respect to the first guide rail 75 by a driving device such as a motor (not shown).

  The dressing device moving unit 55 supports the dressing device 5 so as to be movable in the first direction D1. The dressing device moving part 55 is supported by the support leg upper connecting part 72 through the second guide rail 76 so as to be movable in the vertical direction Dv. The dressing device moving unit 55 is moved with respect to the second guide rail 76 by a driving device such as a motor (not shown).

  As shown in FIGS. 6 and 7, the workpiece turning conveyance unit 8 moves the workpiece W by turning around the workpiece turning axis O <b> 5 between the workpiece machining position X and the workpiece replacement position Y. The workpiece turning axis O5 is disposed in the transfer opening 70. The work turning conveyance unit 8 includes a rotary shaft main body 81, a rotary shaft drive unit 82, a grip support unit 83, and a grip device 84.

  The rotary shaft main body 81 has a cylindrical shape and extends in the vertical direction Dv. The central axis in the vertical direction Dv of the rotary shaft main body 81 coincides with the workpiece turning axis O5. The rotation shaft main body 81 is inserted through the shaft insertion hole 741.

  The rotary shaft drive unit 82 moves the rotary shaft main body 81 around the workpiece turning axis O5 and in the vertical direction Dv. The rotary shaft drive unit 82 is connected to one end (first end) of the rotary shaft main body 81. The rotating shaft drive unit 82 is fixed on the fixed plate unit 74.

  The rotating shaft drive unit 82 is preferably a combination of a cam unit and a motor. By adopting the cam unit, the rotation shaft main body 81 can be moved around the workpiece turning axis O5 and in the vertical direction Dv with a simple configuration. Further, by adopting a configuration in which the cam unit and the motor are combined, it is possible to realize the compact rotation shaft drive unit 82 and the high speed movement of the rotation shaft main body 81 around the workpiece turning axis O5.

  The grip support portion 83 is connected to the other end portion (second end portion) of the rotary shaft main body 81. The grip support portion 83 is connected to the lower end of the vertical direction Dv in the rotation axis direction. The grip support portion 83 extends in a direction orthogonal to the vertical direction Dv, which is the direction in which the rotating shaft main body 81 extends. The grip support part 83 rotates together with the rotary shaft main body 81.

  The grip device 84 is configured to allow the workpiece W to be attached and detached. A pair of grip devices 84 are provided with respect to the grip support portion 83. The pair of grip devices 84 are respectively connected to both ends of the grip support portion 83 so as to be symmetric with respect to the rotary shaft main body 81. The pair of grip devices 84 are fixed to the grip support portion 83 so that when one grip device 84 is disposed at the workpiece machining position X, the other grip device 84 is disposed at the workpiece replacement position Y. .

  In such a workpiece turning conveyance unit 8, the rotating shaft main unit 81 is moved upward in the vertical direction Dv by the rotating shaft driving unit 82 at the time of replacement. As a result, the workpiece W gripped by the grip device 84 at the workpiece machining position X moves upward in the vertical direction Dv with respect to the workpiece table 3. Thereafter, the rotary shaft main body 81 is rotated by the rotary shaft drive unit 82, whereby the grip device 84 at the workpiece machining position X is pivoted to the workpiece replacement position Y. After the turning movement, the rotary shaft main body 81 is moved downward in the vertical direction Dv by the rotary shaft drive unit 82. As a result, the workpiece W at the workpiece machining position X moves to the workpiece exchange position Y, and the workpiece W at the workpiece exchange position Y is set on the workpiece table 3 at the workpiece machining position X.

  The tooth aligning device 9 detects the phase of the teeth of the work W attached to the work table 3 by a non-contact electromagnetic sensor (not shown). Thereafter, the tooth alignment device 9 rotates the work table 3 based on the detected phase to align the phases of the workpiece W teeth and the grinding teeth of the grindstone T. As a result, the tooth alignment device 9 causes the work table 3 to perform a tooth alignment operation that provides a rotational phase relationship that allows the workpiece W, the grindstone, and T to engage with each other.

  The tooth aligning device 9 is attached in the conveying opening 70 of the tailstock support portion 7. The tooth alignment device 9 is disposed in the support leg lower connecting portion 73 away from the fixed shutter portion 78 in the first direction D1.

  In the gear grinding apparatus 1 as described above, the rotary shaft main body 81 is disposed in the transfer opening 70 formed in the tailstock support portion 7. Therefore, when the workpiece W is moved between the workpiece machining position X and the workpiece exchange position Y, the workpiece W moves around the rotary shaft main body 81 within the transfer opening 70. Therefore, the turning radius when moving the workpiece W can be made smaller than when the workpiece W is moved so as to turn around the tailstock support portion 7. As a result, the workpiece turning conveyance unit 8 can be reduced. Therefore, it is possible to reduce the area required when installing the workpiece turning conveyance unit 8 with respect to the bed 2. Thereby, size reduction as the whole gear grinding device 1 can be attained, ensuring the space for conveying work W.

  Further, since the turning radius when moving the workpiece W is reduced, the movement time when moving the workpiece W is shortened. As a result, cycle time can be shortened. In addition, the entire apparatus can be reduced in size.

  Further, by configuring the rotary shaft drive unit 82 with a cam unit and a motor, the whole can be made compact and the movement of the rotary shaft main body 81 around the workpiece turning axis O5 can be speeded up.

  Further, the pair of support legs 71 and the support leg upper connecting portion 72 are formed in a gate shape, and the space inside thereof is formed as the transfer opening 70. Since the support leg 71 is connected by the support leg upper connection part 72, the rigidity as the tailstock support part 7 can be improved. And the rotating shaft drive part 82 is being fixed to the support upper connection part which rigidity improved. Therefore, the rotary shaft drive unit 82 can be fixed in a stable state, and the rotary shaft main body 81 can be driven stably in the transport opening 70. Therefore, the workpiece W can be stably conveyed in the conveyance opening 70.

  Further, the tooth alignment device 9 is provided in the transport opening 70. Therefore, the accessibility to the tooth matching device 9 from the outside is improved. Thereby, the workability | operativity at the time of the maintenance of the tooth alignment apparatus 9 can be improved.

  Moreover, in the tooth alignment apparatus 9, in order to match | combine the phase of the workpiece | work W and the grindstone T, it is necessary to rotate the work table 3 after measuring the position of the workpiece | work W. FIG. If the tooth alignment device 9 is attached to the grindstone support 4, the grindstone support 4 must be brought close to the work table 3 in order to confirm the position of the work W. However, when the work table 3 is rotated, the grindstone support portion 4 must be moved away from the work W in order to prevent the work W and the grindstone T from coming into contact with each other. As a result, extra time is required to move the grindstone support portion 4 only for tooth alignment. However, in the present embodiment, the tooth aligning device 9 is attached to the tailstock support portion 7 instead of the grindstone support portion 4. Thereby, it becomes unnecessary to move the grindstone support part 4 at the time of tooth alignment, and the working time can be shortened.

  Further, the tooth aligning device 9 can be protected from the coolant (coolant such as grinding oil) scattered by the fixed shutter portion 78 and the movable shutter portion 79 when the workpiece W is processed. In addition, since a part is covered with the fixed shutter portion 78, the movable shutter portion 79 can be moved for a longer time than when the movable opening portion 79 covers the entire opening portion on the workpiece machining position X side. Can be shortened. Thereby, the cycle time at the time of a process can be shortened.

(Other variations of the embodiment)
Although the embodiments of the present invention have been described in detail with reference to the drawings, the configurations and combinations of the embodiments in the embodiments are examples, and the addition and omission of configurations are within the scope not departing from the gist of the present invention. , Substitutions, and other changes are possible.

  The tailstock support portion 7 is not limited to a structure having a pair of support legs 71. The tailstock support portion 7 only needs to be able to move the tailstock 6 and the dressing device 5. Therefore, the tailstock support part 7 may be formed as one pillar, for example.

  Further, the number of support legs 71 is not limited to two. The support leg 71 only needs to secure rigidity capable of supporting the load generated in the tailstock 6. Therefore, the support legs 71 may be three or more.

  Further, the transport opening 70 is not limited to being formed by the pair of support legs 71, the support leg upper connection part 72, and the support leg lower connection part 73. The transport opening 70 may be formed in the tail stock support 7 so as to allow the workpiece W to pass therethrough. Therefore, the conveyance opening 70 may be formed as a hole penetrating the tailstock support portion 7 formed as one column. Further, for example, when the pair of support legs 71 are directly connected to the bed 2 without the support leg lower connecting portion 73 being interposed, the transfer opening 70 includes the pair of support legs 71 and the support leg upper connecting portion. 72 and the bed 2 (bed upper surface 20).

  Further, the support leg 71 is not limited to a shape that extends straight only in the vertical direction Dv. The support leg 71 may extend in a direction inclined with respect to the vertical direction Dv so as to be inclined with respect to the bed upper surface 20.

  Further, the tailstock support portion 7 is not limited to a structure that is fixed to the bed 2 via the support leg lower connecting portion 73. For example, the tail stock support portion 7 may have a structure in which the support leg 71 is not fixed to the bed 2 and the support leg 71 is directly fixed to the bed 2. In this case, the tailstock support portion 7 may be formed to have a gate shape with respect to the bed 2 by the pair of support legs 71 and the support leg upper connecting portion 72.

  Further, the tail stock support portion 7 is not limited to a structure that supports the tail stock 6 via the support leg upper connecting portion 72. For example, the tail stock support portion 7 may have a structure in which the tail stock 6 is directly supported by the support leg 71 without having the support leg upper connecting portion 72.

  Further, the tail stock moving unit 65 is not limited to moving the tail stock 6 only in the vertical direction Dv. The tail stock moving unit 65 only needs to be able to move the tail stock 6 toward the work table 3. Therefore, for example, the tail stock moving unit 65 may move the tail stock 6 with respect to the tail stock support unit 7 so as to follow a curved movement path. In addition, the tail stock moving unit 65 may move the tail stock 6 so as to turn around the tail stock support unit 7.

  Further, the dressing device 5 is not limited to being attached to the tailstock support portion 7, and the dressing device 5 may be provided on the bed 2 by another member other than the tailstock support portion 7. Good.

  Further, the dressing device moving unit 55 is not limited to moving the dressing device 5 only in the vertical direction Dv. The dressing device moving unit 55 only needs to move the dressing device 5 toward the grindstone T. Therefore, for example, the dressing device moving unit 55 may move the dressing device 5 with respect to the tail stock support unit 7 so as to follow a curved moving path. Further, the dressing device moving unit 55 may move the dressing device 5 so as to turn around the tailstock support unit 7.

  Further, the present invention is not limited to the case where the turning conveyance method is adopted as the workpiece W conveyance method. Instead of the swivel transfer method, a line transfer method is used in which the workpiece machining position and the workpiece replacement position are transferred directly or on a rail having a plurality of bent portions, and the rail is arranged in the transfer opening 70. But you can.

DESCRIPTION OF SYMBOLS 1 ... Gear grinding apparatus T ... Grinding wheel W ... Workpiece Dv ... Vertical direction D1 ... First direction D2 ... Second direction 2 ... Bed 20 ... Bed upper surface 3 ... Work table 4 ... Grinding wheel support part O3 ... Table axis 41 ... Grinding wheel support part Main body 42 ... Grinding wheel moving part 43 ... Grinding wheel drive part 5 ... Dressing device 6 ... Tail stock 7 ... Tail stock support part 71 ... Support leg 711 ... Support leg main body part 712 ... Support leg reinforcing part 713 ... Top plate 72 ... Above support leg Connecting portion 73: Lower supporting leg connecting portion 74 ... Fixed plate portion 741 ... Shaft insertion hole 75 ... First guide rail 76 ... Second guide rail 78 ... Fixed shutter portion 79 ... Movable shutter portion 70 ... Transport opening portion 65 ... Tail stock Moving part 55 ... Dressing device moving part 8 ... Work swivel conveying part (work conveying part) X ... Work machining position Y ... Over click replacement position 81 ... rotary shaft body O5 ... work pivot shaft 82 ... rotational shaft drive section 83 ... grip support portion 84 ... gripping devices 9 ... meshing device

Claims (6)

Bed and
A work table that rotatably supports a work to be a gear on the bed;
A grinding wheel for grinding the workpiece;
A grindstone support unit that rotationally drives the grindstone and movably supports the worktable on the bed;
A tailstock that holds the work supported by the worktable from above in the vertical direction;
A tailstock support that movably supports the tailstock on the bed;
Workpiece exchanging position at which the work can be placed on the worktable, and a work piece that is at a position opposite to the work machining position across the tailstock support portion and that can be exchanged for an unworked work piece A workpiece transfer unit that moves the workpiece between positions,
A gear grinding apparatus in which the tail stock support portion is formed with a conveyance opening through which the workpiece machining position and the workpiece exchange position are communicated and through which the workpiece can pass. The workpiece transfer unit is
A rotating shaft main body centering on a workpiece turning axis extending in the vertical direction;
A rotary shaft drive unit that is connected to one end of the rotary shaft main body and moves the rotary shaft main body around the workpiece turning axis and in a vertical direction;
A grip support connected to the other end of the rotary shaft main body and extending in a direction perpendicular to the direction in which the rotary shaft main body extends;
A pair of grip devices connected to the grip support and detachable from the workpiece,
The pair of grip devices are fixed to the grip support portion so that when the one grip device is disposed at the workpiece machining position, the other grip device is disposed at the workpiece replacement position. ,
The workpiece turning axis is disposed in the transfer opening,
The gear grinding apparatus according to claim 1, wherein the workpiece transfer unit is capable of moving the workpiece between a workpiece machining position and the workpiece replacement position by turning around the workpiece turning axis. Mounted in the transfer opening of the tailstock support,
The gear grinding apparatus according to any one of claims 1 and 2, further comprising a gear aligning device that causes the work table to perform a gear aligning operation so that the workpiece and the grindstone can mesh with each other. . The tailstock support is
A pair of support legs that extend upward in the vertical direction with respect to the bed, and are arranged apart from each other in a direction intersecting with the moving direction of the grindstone support portion so as to sandwich the work table;
A support leg upper connecting portion that connects the pair of support legs above in the vertical direction;
The said conveyance opening part is formed so that the said workpiece | work processing position and the said workpiece | work exchange position may be connected while being demarcated by at least a pair of said support leg and the said support leg upper connection part. The gear grinding apparatus as described in any one of Claims. The tailstock support part has a support leg lower connecting part that connects the pair of support legs below in the vertical direction,
The gear grinding device according to claim 4, wherein the conveying opening is further defined by the support leg lower connecting portion. A fixed shutter portion fixed so as to close a lower portion in the vertical direction of the opening portion on the workpiece processing position side of the transport opening portion; and
A movable shutter unit that is movably attached in a vertical direction at a position closer to the work table than the fixed shutter unit, and
The gear grinding according to any one of claims 1 to 5, wherein the fixed shutter portion and the movable shutter portion can close an opening portion of the transfer opening portion on the workpiece processing position side. apparatus.

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