JP3600258B2 - Conical gear processing equipment - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an apparatus for processing a conical gear such as a spiral bevel gear and a hypoid gear, and more particularly to an improvement in workability.
[0002]
[Prior art]
As an apparatus for processing a conical gear, for example, there is an apparatus described in Japanese Patent Publication No. 40-2183. This apparatus holds a machining tool and has a tool spindle that has a tool spindle that rotates the machining tool around an axis, and a machine that has a workpiece spindle that holds a workpiece and rotates the workpiece around the axis. And a headstock. The tool headstock and the workpiece headstock are provided to face each other, and the workpiece headstock and the tool headstock are moved relative to each other in a three-dimensional direction and the workpiece spindle is rotated around a rotation axis perpendicular to the tool spindle. With the workpiece and the processing tool being positioned with respect to each other, the processing tool is rotated and approached to the workpiece while being rotated, and the workpiece is processed.
[0003]
Also, this processing equipmentFor transporting and loading and unloading to and from the workpiece spindleA transfer / detachment device is provided so that the transfer / detachment of the workpiece to / from the workpiece spindle is automatically performed. The workpiece transfer / attachment / removal device is provided between the workpiece headstock and the tool headstock in a direction orthogonal to the direction in which the workpiece headstock and the tool headstock are arranged. Conveyed to the workpiece spindle and transferred to the workpiece spindleLoadingAt the same time, the machined workpiece isUnloading,To be carried away.
[0004]
[Problems to be solved by the invention]
However, this processing apparatus has a problem of poor workability. The workpiece spindle is turned around an axis perpendicular to the tool spindle in order to adjust the tilt angle of the workpiece with respect to the processing tool, and the turning angle is an angle range corresponding to the tilt angle range of the gear (for example, about 30 degrees), the workpiece spindle is always substantially in opposition to the tool spindle, that is, in a direction toward the inside of the gear machining device. The distance from the working device to the workpiece spindle or the tool spindle is long, and it is difficult to perform work such as replacement, cleaning, maintenance and inspection of the workpiece chuck and the processing tool.
In addition, the workpiece transfer / removal device is provided between the workpiece headstock and the tool headstock in a direction orthogonal to the direction in which they are lined up. It protrudes to both sides of the headstock and the tool headstock, and accordingly, the distance from the worker or the working device to the workpiece spindle or the tool spindle becomes longer, and the work becomes more difficult.
In addition, if a workpiece carry-in device is provided near one end of the transfer range of the workpiece transfer / detachment device and a work take-out device is provided near the other end, a worker or a work device may be able to move the workpiece. The distance between the spindle and the tool spindle is further increased, making it extremely difficult to perform work.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a conical gear machining apparatus which facilitates operations such as replacement, cleaning, maintenance and inspection of a workpiece chuck and a machining tool.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a conical gear machining device according to the first aspect of the present invention comprises: (a) a frame; and (b) an upper portion of the frame from a machining area where machining of a plurality of workpieces is sequentially performed. A guide rail horizontally fixed and fixed at a position deviated to either one of the bottom and the bottom, (c) a first moving member movable by being guided by the guide rail, (d) For the first moving member, Two in a direction parallel to the direction in which the guide rail extendsIs held immovable relative toRespectively,Said plurality of workpiecesOne by one, one by oneA posture in which the axis of the workpiece is horizontal and parallel to the workpiece delivery direction orthogonal to the direction in which the guide rail extends.Hold in(E) moving the first moving member along the guide rails to move the two first workpiece holders together with the two first workpiece holders; A workpiece holder moving device that moves in a direction parallel to the arrangement direction, (f) a tool headstock having a tool spindle that holds a processing tool in the processing area and rotates the processing tool around an axis, g) a workpiece headstock comprising a workpiece spindle for holding the workpiece at the same height in the machining area as the two first workpiece holders and rotating the workpiece about a horizontal axis. (H) turning the workpiece headstock about a vertical turning axis, and turning the workpiece spindle to a position inclined with respect to the tool spindle and to a position parallel to the workpiece delivery direction; A work headstock swivel, and (i) the work headstock By moving the turning device horizontally and in a direction perpendicular to the direction in which the guide rail extends, the work spindle in a state parallel to the workpiece transfer direction is moved forward and backward, and the two first workpiece holders are moved. And a workpiece spindle advancing / retreating device for exchanging the workpiece with the workpiece spindle.
The work holder is defined as "first" in the conical gear machining apparatus according to the second aspect of the present invention. This is for distinguishing from the workpiece holder.
[0006]
The conical gear machining apparatus according to the second aspect of the present invention further includes, in addition to the components of the first aspect, (j) in the vicinity of one end of the movement range of the two first workpiece holders, A carry-in shooter that is provided with a lower inclination toward the end side and moves the workpiece inward of the conical gear processing device in a posture where the axis of the workpiece is substantially parallel to the workpiece delivery direction; ) Provided near the other end of the range of movement of the two first workpiece holders, inclined higher toward the one end, and the inner end on the higher side is the inner end of the carry-in shooter. (L) a stopper provided at the inner end of the carry-in shooter for stopping the movement of the workpiece, and (m) (a) removing the workpiece stopped by the stopper from the workpiece. The axis of which is held in a posture parallel to the workpiece transfer direction. A crop holder, and (a) a workpiece provided on the frame, the workpiece held by the second workpiece holder by raising the second workpiece holder, and the two first workpiece holders; A work lifting device that lifts the work to a height that can be higher than the stopper at the same height, and includes a holding assist device that assists the first work holder to hold the work.
According to a third aspect of the present invention, in the conical gear machining apparatus according to the second aspect of the present invention, (i) a second moving member that is raised and lowered by the workpiece lifting device; ) The second moving member is movably held in a direction parallel to the workpiece transfer direction, and the second moving memberCarry inThe part protruding to the shooter side isWorkA support portion larger than the shaft hole is provided, and the support portion is protruded from the support portion and fitted into the shaft hole.WorkA holding member provided with a holding projection for holding theCarry inThe gist of the present invention is that the urging means includes urging means for urging in the forward direction toward the shooter side, and (iv) a stopper for regulating the advancement limit of the holding member by the urging force of the urging means. .
According to a fourth aspect of the present invention, there is provided the conical gear machining device according to any one of the first to third aspects, wherein the frame, the guide rail, the first moving member, the two first workpiece holders, and the first workpiece holder moving. The gist is that the device, the tool headstock, the work headstock, the work headstock swivel device and the work head advancing / retreating device are covered by a cover, and a part thereof is configured not to protrude outside the cover. It is.
[0007]
[Action]
In the conical gear machining apparatus according to the first aspect of the present invention, the unprocessed workpiece isOne of the two first workpiece holders with the axis horizontalAnd the first workpiece holder isFirst workpiece holder moving deviceThe workpiece is conveyed to the vicinity of the work spindle.Workpiece spindle and first workpiece holderWhen transferring the workpiece betweenButThe workpiece is rotated by a headstock swivel device, and the workpiece spindle is rotated to a position parallel to the workpiece transfer direction, and the workpiece is held by the first workpiece holder.WasIt is transferred to and from the workpiece spindle in a posture.Since one of the two first workpiece holders holds the workpiece but the other does not, the first first workpiece holder first holds the workpiece on the workpiece spindle after the other first workpiece holder holds the workpiece. After that, the unprocessed workpiece held and transported by one of the first workpiece holders is transferred to the workpiece spindle. The first workpiece holder that has received the processed workpiece from the workpiece spindle carries the workpiece out of the processing area. on the other hand,After the workpiece spindle receives the workpiece from the first workpiece holder, the workpiece headstock is turned by the workpiece headstock turning device, so that the workpiece spindle approaches the tool spindle and the workpiece spindle moves relative to the tool spindle. The workpiece is positioned at a position inclined by an angle determined by the root cone angle, and the workpiece is processed by a processing tool. After machining, the workpiece headstock is turned and the workpiece spindle moves in the workpiece delivery direction.ToParallel and the workpiece is held by the workpiece spindleWasIt is passed to the first workpiece holder in the posture.
[0008]
In order to transfer the workpiece between the first workpiece holder and the workpiece spindle, two The first workpiece holder may simply perform horizontal movement parallel to the direction in which the guide rail extends, and other movements are performed by the workpiece spindle. The workpiece spindle is turned by the workpiece headstock turning device so that the workpiece spindle is parallel to the workpiece transfer direction, and the workpiece spindle revolving device makes the workpiece spindle turning device horizontal and orthogonal to the direction in which the guide rail extends. In this case, the workpiece spindle is advanced and retracted, and the transfer of the workpiece between the two first workpiece holders is performed. Since the two first workpiece holders are provided side by side in the direction in which the guide rails extend, and the heights of the two first workpiece holders and the workpiece spindle are the same, The first workpiece holder does not need to be raised and lowered for delivery of the workpiece to and from the workpiece spindle.
[0009]
MothThe id rail may be provided horizontally at a position deviating either above or below the processing area.For example, as described in the section of the embodiment, the work headstock and the tool headstock are aligned. It may be provided parallel to the direction, or may be provided at right angles. As long as it deviates upward or downward from the machining area and is horizontal, it may be parallel or perpendicular to the rotation axis of the tool spindle or may be inclined.
[0010]
In the conical gear machining apparatus according to the second aspect of the present invention, the unprocessed workpiece is carried in by the carry-in shooter. The workpiece is moved into the conical gear processing device by the inclination of the carry-in shooter, and after the movement is stopped by the stopper,Of retention aidsHeld by the second workpiece holderTo the same height as the two first workpiece holdersCan be lifted.The workpiece is delivered at that position to one of the two first workpiece holders, at which height the workpiece can pass over the stop of the incoming chute, so that a simple horizontal movement of the first workpiece holder is achieved. ByThe workpiece is transported over the stopper to the vicinity of the work headstock.
[0011]
The second workpiece holder holds the workpiece in a posture parallel to the above-described workpiece delivery direction, and lifts the workpiece to the same height as the two first workpiece holders as described above. The workpiece holder is used to transfer the workpiece to and from the second workpiece holder. In this case, the movement may be simply performed in a direction parallel to the direction in which the guide rail extends.
[0012]
After processing,Unloaded from the workpiece spindle by the first workpiece holderThe workpiece is carried out by the carry-out chute. The workpiece moves by the inclination of the unloading chute and is unloaded.
The inner end of the unload chute is higher than the inner end of the import chute, and the inner end of the unload chute isFirst workpiece holderAt a height suitable for receiving workpieces fromBecause of the first workpiece holderWithout changing the workpiece holding height.CarryingInput shooterInner edge ofAnd the unloading shooterThere is a difference in height between the inner end,Height differenceButFilled by the work lifting device of the holding aid.
[0013]
【The invention's effect】
As described above, according to the first aspect of the present invention, the workpiece headstock is rotated when the workpiece is delivered, and the workpiece spindle is moved in the workpiece delivery direction.ToParallel. Therefore, while turning the work spindle to the outside of the conical gear machining device,First work holderIt can be provided at a position outside the frame, so that the work spindle can be controlled by a worker or working equipment outside the conical gear machining device as compared to the case where the workpiece spindle is always facing inward of the conical gear machining device. The distance to the main axis becomes shorter.
Also, as in the case where the workpiece transfer / detachment device is provided across between the workpiece headstock and the tool spindle,First workpiece holderAre workers and working equipmentbyThere is no hindrance to the work on the workpiece spindle and the tool spindle. The guide rails of the workpiece holding device are provided above or below the processing area so that they do not interfere,First workpiece holderCan be moved to a position where it does not interfere with the work, so that it does not hinder the work of the operator or the working device, such as cleaning and inspection of the work spindle and the tool spindle, and replacement of the work chuck, machining tool, etc. Can be easily performed.
Also, most of the movement for workpiece transfer between the workpiece spindle and the first workpiece holder is performed by the workpiece spindle, and the first workpiece holder is simply parallel to the direction in which the guide rail extends. Since the first workpiece holder may be moved, the first workpiece holder can be fixedly provided on a moving member that is guided and moved by the guide rail. In addition, it is possible to simplify a workpiece transfer / detachment device that transfers, loads, and unloads a workpiece. In addition, the movement of the workpiece spindle required for that purpose is originally a movement required for machining the conical gear, and does not necessarily complicate the configuration of the machining unit for machining the workpiece. As a result, the configuration of the entire conical gear machining device can be simplified. Further, since there are provided a first workpiece holder for loading the workpiece onto the workpiece spindle and a first workpiece holder for unloading the workpiece from the workpiece spindle, the workpiece is unloaded. Loading and loading can be performed quickly, and the two first workpiece holders are provided side by side in a direction parallel to the direction in which the guide rails extend. In order to replace the holders, the holders may be simply moved in a direction parallel to the direction in which the guide rails extend. In this respect, the structure of the apparatus is simple.
[0014]
According to the second aspect of the present invention, since the workpiece is carried in and out by the shooter using the inclination, no power is required, and the workpiece can be carried in and out easily and inexpensively.
[0015]
In addition, the carry-in shooter and the carry-out shooterOf the two first workpiece holdersIt is provided near each end of the movement range, and is located away from the work headstock and tool headstock, so that workers and working equipment are prevented from performing work on the work spindle and tool spindle. There is no.
[0016]
Further, since the inner end of the unloading chute is higher than the inner end of the loading chute, the height of the workpiece can be prevented from being reduced even when both the loading and unloading are performed by tilting the chute. If the inner end of the carry-out chute is lower than the inner end of the carry-in chute, the loading / unloading of the work itself becomes easier, but the height of the work is lower at the time of carry-out than at the time of carry-in. As a result, the handling of the workpiece after being unloaded is often inconvenient, but this inconvenience can be avoided.In addition, the difference in height between the inner end of the unloading chute and the inner end of the input chute is filled by the holding auxiliary device for raising and lowering the second workpiece holder, so that the two first processes for loading and unloading are performed. The crop holder may be simply moved horizontally, and the carry-in shooter, the holding auxiliary device and the work transfer / removal device (guide rail, first moving member, two first work holders and first work holder) The structure of the whole work loading / unloading / unloading / unloading device constituted by the moving device) and the unloading shooter can be simplified. In addition, since the height difference between the inner end of the unloading shooter and the inner end of the loading chute is filled by the holding auxiliary device provided on the frame side, the first work holder is moved up and down to the work transfer / removal device. It is not necessary to provide a device for performing the operation, the inertial mass is reduced, and the transfer, loading and unloading of the workpiece can be performed quickly.
[0017]
【Example】
Hereinafter, embodiments common to the inventions of claims 1 to 4 will be described.WorkpieceTaking an example of a conical gear machining device that performs rough machining on a blank, explained in detail based on the drawingsYouYou.
In FIG. 2, reference numeral 10 denotes a bed, and a rib 12 is formed on the periphery of the bed 10. The upper surface of the bed 10 is horizontal, and a tool unit 14 and a work unit 16 are provided. A region on the bed 10 where the tool unit 14 and the workpiece unit 16 are provided is a machining region.
[0018]
The tool unit 14 has a tool moving table 20 provided on the bed 10. A guide rail 22 is provided on the bed 10 and extends in a direction parallel to the direction in which the tool unit 14 and the workpiece unit 16 are arranged. The tool moving table 20 is provided with a tool moving motor 24 provided on the bed 10. Is moved along the guide rail 22.
[0019]
A column 28 is erected on the tool moving table 20. A pair of vertically extending guide rails 30 is provided on the side surface of the column 28, and a tool headstock 32 is slidably fitted thereto. The column 28 includes a tool headstock vertical movement motor 34, and the tool headstock 32 is moved up and down along the guide rail 30 by driving of the tool headstock vertical movement motor 34. The tool carriage 20, the guide rail 22, and the tool carriage motor 24 constitute a tool headstock horizontal movement device 36, and the guide rail 30 and the tool headstock vertical movement motor 34 constitute a tool headstock elevating device 38. It is.
[0020]
The tool spindle 32 has a tool spindle 40 rotatably and movably provided about an axis parallel to the moving direction of the tool moving table 20. The tool spindle 40 is rotated by a tool spindle drive motor 42 and moved in the axial direction by a tool spindle feed motor 44. Further, a not-shown gear-cutting cutter, which is a processing tool, is held at a portion of the tool spindle 40 on the workpiece unit 16 side. The position of the gear cutting cutter with respect to the workpiece is adjusted by raising and lowering the tool headstock 32 and moving the tool moving table 20, and the workpiece is processed by feeding and rotating the tool spindle 40.
[0021]
The workpiece unit 16 has a workpiece moving table 50. A pair of guide rails 52 is fixed to the bed 10, and the workpiece moving table 50 is guided by the guide rail 52 by the workpiece moving motor 54 and is moved in a horizontal direction orthogonal to the axis of the tool spindle 40. Can be
[0022]
A turning table 58 is provided on the workpiece moving table 50 so as to be rotatable around a vertical axis perpendicular to the tool spindle 40. On the turning table 58, a workpiece spindle holding a workpiece spindle 60 in a rotatable manner. The table 62 is fixed. The workpiece spindle 60 extends in the horizontal direction, and is intermittently rotated by a predetermined angle around its own axis by an indexing motor 64. The projecting end of the workpiece spindle 60 from the workpiece headstock 62 is provided with a workpiece chuck as a workpiece holder, and a blank 66 shown by a two-dot chain line in FIG. 3 is held.
[0023]
The workpiece headstock 62 is moved in a horizontal direction perpendicular to the axis of the tool spindle 40 by the movement of the workpiece moving table 50, and is turned by the turning of the turntable 58. The workpiece moving table 50, the guide rail 52, and the workpiece moving motor 54 constitute a workpiece headstock moving device 67.
[0024]
The swivel 58 is swung by a work headstock swivel motor 68, whereby the work spindle 62 is swung and the work spindle 60 is swung. The pivotable range of the turntable 58 is 90 degrees as shown in FIG. 2, that is, between the state where the workpiece spindle 60 is parallel to the tool spindle 40 and the state where it is perpendicular as shown in FIG. The workpiece chuck 60 is not only tilted with respect to the tool spindle 40 but also parallel to the direction in which the workpiece spindle moving device 67 moves the workpiece spindle 60, and is a workpiece holding end of the workpiece spindle 60. Is rotated outward from the gear processing apparatus, that is, in a direction away from the processing space of the blank 66 by the processing tool, and the blank 66 is attached and detached in this direction.
[0025]
The swivel 58 and the work headstock swivel motor 68 constitute a work headstock swivel device 69.
The state in which the axis of the workpiece spindle 60 and the axis of the tool spindle 40 are concentric by the movement and rotation of the workpiece headstock moving device 67 and the workpiece headstock turning device 69 is set as a reference state.
[0026]
The blank 66 is a material to be processed into a hypoid gear, and has a shaft hole 70 having a circular cross section penetrating on the axis O as shown in FIG. Further, on the outer peripheral surface, a tooth tip conical surface 74 and a back conical surface 76 which are inclined with respect to the axis O and cross each other are formed. The angle θ formed by the tip cone 74 with respect to the axis O₁  Is an obtuse angle, the angle θ formed by the conical surface 76 with respect to the axis O.₂  Is the angle θ₁  Has been smaller. Further, the end surface of the blank 66 on the side of the back conical surface 76 is used as a processing reference surface 78.
[0027]
At the front of the bed 10 (on the side where the blank 66 is located when the workpiece spindle 60 is turned to a position perpendicular to the tool spindle 40), as shown in FIG. Support columns 90 as support members are respectively provided upright at two places separated in a direction parallel to the direction in which the object units 16 are arranged. These columns 90 extend above the tool unit 14 and the work unit 16, that is, above the machining area, and a pair of guide rails 92 are provided horizontally between upper ends thereof. The guide rail 92 is provided in a direction parallel to the direction in which the tool unit 14 and the workpiece unit 16 are arranged. The guide rail 92 is orthogonal to the direction in which the guide rail 92 extends and the horizontal direction is the direction of the workpiece headstock 62. It is parallel to the moving direction, and this direction is the workpiece transfer direction.
[0028]
A moving member 96 on which a workpiece holding device 94 is mounted is slidably fitted to these guide rails 92. A nut (not shown) provided on the moving member 96 is screwed to a ball screw 98 having both ends fixed to the support column 90, and the nut is rotated by a moving member driving servomotor 100 mounted on the moving member 96. Accordingly, the moving member 96 is moved, and the workpiece holding device 94 is moved in the horizontal direction.
[0029]
A support member 104 is attached downward to the moving member 96. As shown in FIG. 7, a loading holder 106 and an unloading holder 108 of the workpiece holding device 94 are mounted on the lower end of the support member 104. They are mounted side by side in a direction parallel to the moving direction of the object holding device 94. The configurations of the loading holder 106 and the unloading holder 108 are almost the same, and the unloading holder 108 will be described as a representative, and only the different parts of the loading holder 106 will be described.
[0030]
As shown in FIG. 7, the unloading holding tool 108 has a holding tool body 110 fixed to the support member 104 and a holding tool slidably fitted to the holding tool body 110 in a direction perpendicular to the workpiece transfer direction. It has two holding claws 112 as members. The mutually separated ends of the holding claws 112 are respectively protruded in a direction away from the holder main body 110 as shown in FIG. 8, and two holding projections 116 and 118 are provided at the protruding ends thereof. At a position separated by a distance in the direction, it protrudes toward the holding center of the unloading holding tool 108.
[0031]
Of the holding projections 116, 118, the holding projection 116 farther from the tool unit 14 and the workpiece unit 16 is longer than the holding projection 118 on the closer side, and the tips of the holding projections 116, 118 have inclined surfaces 120, respectively. , 122 are formed so as to be away from each other as they go downward, and the distance between the holding projections 116, 118 is increased. The inclination angles of the inclined surfaces 120 and 122 with respect to the center line extending through the holding center of the unloading holding tool 108 and extending in the workpiece transfer direction are larger than the inclination angles of the tooth tip conical surface 74 and the back cone surface 76, respectively. ing. Each inclination angle θ of each tip conical surface 74 and dorsal conical surface 76 of all types of blanks 66 processed by the present conical gear processing device.₁  , Θ₂  It is being made larger.
[0032]
As shown in FIG. 7, the protruding end surface 124 of the holding protrusion 116 is closer to the center of the workpiece holding device 94 in the moving direction, as shown in FIG. The escape part 128 is formed by being inclined away from the holding center of the holding projection 118, while the protruding end face 126 of the holding projection 118 is a flat surface. Although not shown, each boundary between the inclined surfaces 120 and 122 and the protruding end surfaces 124 and 126 is rounded.
[0033]
The two holding claws 112 are moved by an air cylinder as a driving source provided between one holding claw 112 and the holder main body 110. As shown in FIG. 7, a rack 130 extending in the sliding direction of the holding claw 112 is formed at each of the portions of the two holding claws 112 fitted to the holding tool main body 110. The pinion 132 is engaged with the pinion 132 so as to be rotatable around an axis parallel to the delivery direction.
[0034]
As shown in FIG. 8, an engaging plate 134 is horizontally protruded from the back surface of the rack 130 of the holding claw 112, and passes through a through hole 136 formed in the holding tool body 110. It is projected outside. A piston rod 140 of an air cylinder 138 attached to the rear surface of the holder main body 110 is engaged with the protruding end of the engagement plate 134. The holding claws 112 are moved symmetrically with respect to the rotation axis of the pinion 132 and a sufficient distance to hold and release the blank 66.
[0035]
The rotation axis of the pinion 132 is the holding center of the unloading holder 108, and the unloading holder 108 is provided such that the holding center is located at the same height as the axis of the work spindle 60. Further, the linear motion of the air cylinder 138 as a linear drive source, which is a type of drive source, is transmitted to the holding claws 112 by a motion transmitting mechanism constituted by the rack 130 and the pinion 132, and the holding claws 112 are moved. The linear drive source and the motion transmitting mechanism constitute a holding claw moving device.
[0036]
Further, a guide pin 142 as a guide member protrudes below the holding center of the holder main body 110 and at a position closer to the loading holder 106 than a portion where the holding claw 112 is slidably fitted. Have been. The configuration of the loading holder 106 is the same as that of the unloading holder 108 except that the guide pin 142 is not provided.
[0037]
In the moving range of the workpiece holding device 94 of the bed 10, a carry-in shooter 150 for carrying in the blank 66 is provided near the end on the tool unit 14 side as shown in FIG. An unloading shooter 152 for unloading the blank 66 is provided near the side end. The loading shooter 150 has a bottom wall 154 and a pair of side walls 156 to form a groove as shown in FIG. 6, opens upward, and is inclined so as to be lower toward the inside of the conical gear machining apparatus. The input port of the carry-in shooter 150 is projected laterally from a space vertically above the bed 10.
[0038]
The pair of side walls 156 of the carry-in shooter 150 are provided at intervals such that the blank 66 can move in a posture in which its axis is substantially parallel to the workpiece transfer direction. A cutout 158 shown in FIG. 5 is formed in each of the side walls 156 on the inner end side of the carry-in chute. Further, a block-like stopper 160 is provided on the side wall 156 on the tool unit 14 side so as to stop the movement of the blank 66.
[0039]
As shown in FIG. 7, the unloading shooter 152 also has a groove shape, has a bottom wall 164 and a pair of side walls 166, is opened upward, and is inclined higher toward the inner end side of the conical gear machining device. Have been. The inner end of the carry-out chute 152 is higher than the inner end of the carry-in chute 150 and at a height where the bottom wall 164 is located below the guide pin 142 provided on the unloading holding tool 108. In addition, the pair of side walls 166 are provided at intervals so as to move the workpiece in a posture in which its axis is substantially parallel to the workpiece delivery direction. Further, a support portion 168 extending horizontally at a height corresponding to the holding center of the unloading holding tool 108 is provided at a portion of the side wall 166 on the inner end side of the unloading shooter. There is no.
[0040]
As shown in FIG. 1, a holding auxiliary device 170 is provided adjacent to the carry-in shooter 150. A guide rail 172 is provided in a vertical direction on a column 90 erected on the loading shooter 150 side of the bed 10, and a moving member 174 is slidably fitted as shown in FIGS. 5 and 6. The moving member 174 is moved up and down by an air cylinder (not shown) as a driving source provided between the moving member 174 and the column 90.
[0041]
As shown in FIG. 5, a block-shaped guide member 176 is provided on the moving member 174 in parallel with the workpiece transfer direction, and a moving member 178 is slidably fitted. The moving member 178 is moved by an air cylinder (not shown) as a driving source provided between the moving member 178 and the moving member 174.
[0042]
From the vertical side surface of the moving member 178, a support member 182 is provided so as to project in a direction parallel to the moving direction of the workpiece holding device 94. As shown in FIG. 6, a holding member 184 is slidably fitted to the moving member 178 in a direction parallel to the workpiece transfer direction, and a spring 186 as an elastic member which is a kind of biasing means. Thus, it is urged in the forward direction protruding toward the carry-in shooter 150 side. Therefore, the holding member 184 can be retracted relatively to the moving member 178 by compressing the spring 186. The advance limit of the holding member 184 is defined by the disk-shaped stopper 188 fitted to the holding member 184 coming into contact with the moving member 178.
[0043]
At a protruding end of the holding member 184 from the support member 182, a disk-shaped support portion 190 larger than the shaft hole 70 of the blank 66 is provided, and the support portion 190 is provided with a holding protrusion 192. . The holding projection 192 has a fitting portion 194 having a diameter slightly smaller than the diameter of the shaft hole 70 of the blank 66, and a tapered guide portion 196 whose diameter gradually decreases toward the tip.
[0044]
A support plate 200 as a support member is fixed to the moving member 174. The support plate 200 is located in the same plane as the side wall 156 of the carry-in shooter 150 remote from the holding assist device 170, and has a shape and a size that can be fitted into the notch 158 provided in the side wall 156. The moving member 174 is moved by the air cylinder so that the support plate 200 is located within the notch 158, the holding member 184 is at the lower end position facing the notch 158 of the other side wall 156, and the axis of the holding member 184 is aligned with the workpiece holding device 64. Is moved between the holding center of the loading holding tool 106 and the rising end position that coincides with the holding center.
[0045]
A device having movable parts such as the tool unit 14, the work unit 16, the work holding device, and the work holding device moving device provided on the bed 10 and the space above the bed 10 of the carry-in shooter 150 and the carry-out shooter 152. As shown in FIG. 1, all the located portions are covered by a cover 202 provided on the bed 10, so that generation of noise at the time of processing, scattering of processing chips, coolant, and the like are prevented, and the working environment is deteriorated. Not to be.
[0046]
The portions of the carry-in shooter 150 and the carry-out shooter 152 protruding laterally from the space above the bed 10 are not covered by the cover 202, but intersect with the side walls of the cover 202 of the carry-in shooter 150 and the carry-out shooter 152. The heights of the portions, that is, the portions located on both side surfaces of the present conical gear machining device, from the floor surface are made equal to each other.
[0047]
Next, the operation will be described.
The blank 66 is loaded into the carry-in shooter 150 in such a manner that the axis O is substantially parallel to the workpiece transfer direction in the direction indicated by the arrow in the drawing. The insertion of the blank 66 may be performed automatically, or may be performed manually by an operator.
[0048]
The blank 66 moves toward the inner end of the carry-in shooter 150 due to the inclination of the carry-in shooter 150, and is stopped by the stopper 160. When the blank 66 is carried in, the moving member 174 of the holding assist device 170 is at the lower end position, and the holding member 184 is at the retracted end position. After the blank 66 stops, the holding member 184 is advanced, and the holding projection 192 is fitted into the shaft hole 70 of the blank 66 as shown in FIG.
[0049]
The holding member 184 is further advanced from a state in which the holding projection 192 is fitted in the shaft hole 70, and the support portion 190 is brought into contact with the blank 66, and the blank 66 is pressed against the support plate 200. The moving member 178 is further advanced from a state where the blank 66 is in contact with the support plate 200. This advance is allowed by the compression of the spring 186, the holding member 184 presses the blank 66 against the support plate 200 by the urging force of the spring 186, and the blank 66 is held in a posture where its axis O is parallel to the workpiece transfer direction. 184. Since the support plate 200 is provided, when the holding projection 192 is fitted into the shaft hole 70, even if the blank 66 moves in a direction away from the holding projection 192, the blank 66 is supported by the support plate 200 and the holding projection 192. Can be fitted in the shaft hole 70 and the holding member 184 can hold the blank 66.
[0050]
After holding the blank 66, the moving member 174 is raised as shown in FIG. 10, and the blank 66 is raised while being sandwiched between the support portion 190 of the holding member 184 and the support plate 200, and exceeds the stopper 160. At the same time, the workpiece holder 94 is raised to the same height as the holding center of the loading holder 106 and the unloading holder 108. After ascending, the workpiece holding device 94 is moved, and the holding center of the loading holding tool 106 is aligned with the axis of the holding member 184. At this time, the holding claws 112 of the loading holding tool 106 are opened, and are positioned on both upper and lower sides of the blank 66 as shown in FIGS. 10 and 11.
[0051]
After the movement, the holding claws 112 are closed. At this time, as shown in FIG. 12A, the longer holding projection 116 of the pair of holding projections 116 and 118 hits the conical surface 74 of the tooth tip. The inclination angle of the inclined surface 120 of the holding projection 116 is larger than the inclination angle of the tip cone surface 74, and the projecting end surface 124 of the holding projection 116 has a relief portion at the center position in the moving direction of the workpiece holding device. Since the protrusion 128 is formed, the holding protrusion 116 is provided at two points (generally around the periphery of the work piece such as the blank 66) at a boundary between the inclined surface 120 and the protruding end face 124 in the movement direction of the work holding device. (Two points separated in the direction). The angle θ formed by the conical surface 74 with respect to the axis O₁  Is set at an obtuse angle, so that the blank 66 is retracted away from the support plate 200 while compressing the spring 186 due to the slope effect as the holding claw 112 is closed. Since the boundary between the inclined surface 120 and the protruding end surface 124 is rounded, the sliding resistance can be reduced.
[0052]
Next, as shown in FIG. 12B, the shorter holding projection 118 hits the spinal conical surface 76, and the blank 66 is held by the holding claws 112. The inclination angle of the inclined surface 122 of the holding projection 118 is larger than the inclination angle of the back conical surface 76 and the protruding end surface 126 is a flat surface. One of the boundaries, which is the center position in the moving direction of the workpiece holding device, contacts the blank 66. Since the boundary between the inclined surface 122 and the protruding end surface 126 is rounded, contact resistance can be reduced. The blank 66 is thus held by the pair of holding claws 112 each having two projections 116 and 118, so that the blank 66 cannot be moved in the three directions of the workpiece holding device movement direction, the workpiece delivery direction, and the vertical direction. Will be retained.
[0053]
The angle θ between the tip cone 74 and the back cone 76 with respect to the axis O₁  , Θ₂  The dimensions of the blank 66 and the dimensions of the holding claws 112 are known, and the distance L between the center position of the holding claws 112 in the workpiece transfer direction and the processing reference surface 78 of the blank 66 is known from them (see FIG. 12B). ) Can be calculated, and can be used for setting the moving distance of the workpiece spindle 60 when the workpiece spindle 60 holds the blank 66. The positional relationship between the workpiece holding device 94 and the workpiece spindle 60 is known, and if the distance L based on the holding claws 112 is obtained, the moving distance of the workpiece spindle 60 can be set. .
[0054]
After the loading holder 106 holds the blank 66 in this manner, the holding member 184 is retracted and separated from the shaft hole 70 as shown in FIG. 12C, and the moving member 174 is moved to the descending end position. It is lowered and waits for the next blank 66 to be held. After the holding member 184 is detached, the workpiece holding device 94 is moved toward the workpiece unit 16. In the workpiece unit 16, the workpiece spindle 60 is moved to a position where the axis is parallel to the workpiece delivery direction by turning the turntable 58.
[0055]
The workpiece holding device 94 is moved to a position where the holding center of the unloading holding tool 108 coincides with the workpiece spindle 60 as shown in (1) of FIG. After the movement, the workpiece spindle 64 is advanced to the workpiece holding device 64 side by the workpiece headstock moving device 67, and the rough machining gear 210 obtained by performing the rough machining on the blank 66 is used as an unloading holder. 108 between the holding claws 112.
[0056]
Then, the holding claws 112 are closed to hold the rough machining gear 210. When the workpiece spindle 60 is advanced to pass the rough machining gear 210, the position of the rough machining gear 210 in the axial direction is set when the blank 66 is held by the holding claws 112 as shown in FIG. Moved to a position that exactly matches the position. This moving distance is calculated from the distance L obtained when the loading holder 106 holds the blank 66. Therefore, when the holding claw 112 is closed, the pair of holding projections 116 and 118 simultaneously contact the conical surface 74 and the back conical surface 76 to hold the rough machining gear 210 without moving it in the axial direction. it can.
[0057]
After the unloading holding tool 108 holds the roughing gear 210, the holding of the blank 66 by the work piece chuck at the tip of the work piece spindle 60 is released, and the work piece spindle 60 is once retracted, so that the workpiece holding device Reference numeral 94 denotes a position where the holding center of the loading holding tool 106 coincides with the axis of the workpiece spindle 60 as indicated by (2) in FIG. After the movement, the workpiece spindle 60 is advanced again. The workpiece spindle 60 is advanced to the same position as when the roughing gear 210 is passed to the unloading holder 108. After the workpiece chuck holds the blank 66 at that position, the blank 66 Is released. Then, the workpiece spindle 64 is retracted and turned, and is positioned at a predetermined processing position with respect to the processing tool, and the processing of the blank 66 is started.
[0058]
The workpiece holding device 94 having passed the blank 66 to the workpiece spindle 60 is moved to the vicinity of the inner end of the unloading shooter 152 as shown by (3) in FIG. As shown in FIG. 7, the axis of the roughing gear 210 held by the unloading holder 108 is moved to a release position located between the support portions 168 provided on the pair of side walls 166 of the unloading shooter 152. After the movement, the holding claws 112 are opened to release the roughing gear 210. Since there is no bottom wall at the portion where the support portion 168 is protruded, movement and opening of the holding claw 112 of the unloading holding tool 108 to the release position are allowed.
[0059]
When the holding claw 112 is opened, the rough processing gear 210 is supported by the support portion 168 and does not fall to the side, and is moved toward the discharge shooter 152 by hitting the guide pin 142, and the inside of the discharge shooter 152 is inclined. It moves and is carried out. The difference in height between the guide pin 142 and the bottom wall 164 of the unloading shooter 152 is such that when the holding of the rough processing gear 210 is released and the guide pin 142 is hit, the center of gravity of the rough processing gear 210 is shifted to the bottom wall of the unloading shooter 152. 164 is large enough to move from the inner end position to the outer end side. After the roughing gear 210 is released, the workpiece holding device 94 moves to the carry-in shooter 150 side as shown in (4) of FIG. 13, and holds the blank 66 to be processed next to the workpiece headstock 62. It enters a standby state in order to be transported.
[0060]
As described above, in the conical gear machining apparatus according to the present embodiment, the workpiece spindle 60 is turned and directed to the outside of the machining apparatus. Therefore, the distance from the outside of the machining apparatus to the workpiece spindle 60 is short, and the cleaning is performed. , Inspection, etc. can be easily performed. In addition, since the guide rail 92 for guiding the movement of the workpiece holding device 94 is provided above the machining area, it does not hinder the work on the workpiece spindle 60 and, of course, exchanges the machining tool with the tool spindle 40. The operation for the two spindles 50 and 60 can be easily performed without obstructing the operation.
[0061]
Further, the workpiece holding device 94 has a loading holder 106 and an unloading holder 108, and transfers and receives the blank 66 and the roughing gear 210 to and from the workpiece spindle 60 using dedicated holders. Therefore, the delivery can be performed more efficiently than when only one holder is provided.
[0062]
Further, the blank 66 and the rough processing gear 210 are conveyed without requiring power due to the inclination of the carry-in shooter 150 and the carry-out shooter 152, and the processing apparatus can be configured at low cost.
[0063]
The loading port at the inner end of the unloading shooter 152 is provided at a height suitable for receiving the rough machining gear 210 from the unloading holding tool 108 of the workpiece holding device 94. The roughing gear 210 can be put into the unloading shooter 152 without adjusting the height. The lifting of the blank 66 by the raising of the moving member 174 is designed to fill the difference in height between the inner end of the carry-in shooter 150 and the inner end of the carry-out shooter 152.
[0064]
Further, the loading holder 106 and the unloading holder 108 can hold a plurality of types of blank-shaped or rough-machined gear-shaped workpieces having different sizes. Even if the size of the workpiece is different, the holding protrusions 112 and 118 may be smaller than the maximum opening distance of the pair of holding claws 112 and may come into contact with the holding protrusions 116 and 118 at different times, thereby being released from being pressed against the support plate 200. If the workpiece has a shape and dimensions, it can be held, and machining can be performed more efficiently than when the holder is replaced every time the size of the workpiece, that is, the conical gear to be machined changes. It can be carried out.
[0065]
As is clear from the above description, in the present embodiment, the bed 10, the support 90, and the cover 202 constitute a frame, and the loading holding tool 106 and the unloading holding tool 108 are used.TwoIt constitutes a first workpiece holder. Further, a moving member driving servomotor 100 as a rotary driving source, which is a kind of driving source, and a motion converting mechanism configured by a ball screw 98 and a nut and converting the rotation of the moving member driving servomotor 100 into a linear motion are included.First workpiece holderA guide rail 172, a moving member 174, and an air cylinder (not shown) for moving the moving member 174 constitute a moving device, constitute a work lifting device,The moving member 178, the holding member 184, the spring 186, and the stopper 188It constitutes a second workpiece holder.Further, the work moving table 50, the guide rail 52, and the work moving table motor 54 constitute a work spindle moving device.
[0066]
In addition,In the above-described embodiment, the conical gear machining apparatus for roughing the blank 66 has been described as an example. However, the rough machining gear 210 is usually finished. When performing finishing, use a finishing conical gear machining device with a finishing tool attached to the tool spindle, and the roughing gears carried in by the carry-in shooter are held on the holding member in the same way as blanks After being lifted from the loading chute, it is held and transported by the workpiece holding device. When roughing and finishing are performed continuously, two conical gear processing devices are provided side by side.
[0067]
In this case, since the height from the floor surface of the portion of the carry-in shooter 150 and the carry-out shooter 152 that intersects with the side wall of the cover 202 is made equal, the two conical gear machining devices are arranged by bringing the cover 202 into contact. Then, the carry-out shooter 152 of the conical gear machining device for rough machining can be used as the carry-in shooter 150 of the conical gear machining device for finish machining. If the carry-in chute 150 and the carry-out chute 152 have the same height from the floor, the lifting distance of the moving member 174 of the holding assist device 170, the loading holding tool 106 and the unloading holding tool 108 of the workpiece holding device 94 are provided. It is possible to share the shooter without changing the configuration of the processing device, such as the height of the holding center, and to arrange the two conical gear processing devices without gaps.
[0068]
In this way, as compared with a case where a transfer device is provided between adjacent processing devices to transfer a workpiece, the installation space of the processing device can be reduced, and the workpiece can be moved between the adjacent processing devices during the transfer. There is no possibility that the working fluid or cutting chips that have adhered to the surface will fall and the floor surface will be soiled, and the working environment will not deteriorate.
[0069]
Further, in the above-described embodiment, the holding member 184 is provided with the holding protrusion 192 at the distal end thereof, and is fitted to the shaft hole 70 provided in the blank 66 to hold the blank 66. When the workpiece has a projection projecting from the machining reference plane, a fitting hole for fitting to the projection of the workpiece is provided at the tip of the holding member. The fitting allows the holding member to hold the workpiece. It is only necessary that one of the holding member and the workpiece is provided with a fitting projection and the other is provided with a fitting hole.
[0070]
In the above embodiment, the holding claws 112 of the loading holding tool 106 and the unloading holding tool 108 are moved by a holding claw moving device constituted by the air cylinder 138, the rack 130 and the pinion 132. However, the holding claw moving device may be any device that can move the holding claw by transmitting a driving source and a driving motion of the driving source to the holding claw, for example, using a cam as in a three-claw chuck. Can be configured. A cam that rotates about the holding center is provided in the holder main body, and a spiral cam groove that extends in the circumferential direction and gradually changes in distance from the rotation center is formed on the cam, and provided on the back surface of the holding claw. A projection as a cam follower is fitted. Then, the cam is rotated by a rotation driving device including an air cylinder, a rack and a pinion, a rotation driving device including a motor, and the like, and the projection is moved in the cam groove to linearly move the holding claw.
[0071]
Further, in the above embodiment, the servo motor constituting the work holding device moving device is provided so as to move together with the work holding device 94, but may be provided on the frame side. If provided on the frame side, the work holding device 94 becomes lighter, the inertia decreases, and the traveling speed can be improved.
[0072]
The drive source of the work holding device moving device is not limited to a rotary drive source, but may be a linear drive source such as an air cylinder. The motion transmission mechanism transmits the drive motion of the drive source to the work holding device, and holds the workpiece. What is necessary is just to be able to move the device along the guide rail.
[0073]
Regardless of whether the drive source of the workpiece holding device moving device is provided on either the workpiece holding device or the frame, and regardless of the configuration of the workpiece device moving device, all components including the workpiece device moving device are included. (Excluding the outer end portions of the carry-in shooter and the carry-out shooter) in the cover, when a plurality of processing devices are provided adjacent to each other, the carry-out shooter and the carry-in shooter are respectively provided to the carry-in shooter and the carry-out shooter of the adjacent device. And the effect that the installation space of the device is small as described above can be obtained.
[0074]
However, it is not indispensable to load and unload the workpiece by the shooter. Even if a workpiece loading device and a workpiece unloading device having a different configuration from the shooter are provided near both ends of the moving range of the workpiece holding device, respectively. Good.
[0075]
Further, in the above embodiment, the workpiece spindle is turned to a position facing the tool spindle and to a position orthogonal to the axis of the tool spindle. However, the workpiece spindle may be turned to a position parallel to the tool spindle. Good. The main spindle of the workpiece is rotated by 180 degrees. In this case, the workpiece holding device is provided so as to be movable in a direction orthogonal to the direction in which the tool units and the workpiece units are arranged.
[0076]
Further, the guide rail for guiding the movement of the workpiece holding device is not limited to a guide rail having a rectangular cross section like the guide rail 92 of the above embodiment, and may be a guide rail having a cross section corresponding to the dovetail groove, Alternatively, it may be a rod. In the case of a rod, two rods having a circular cross section are provided, or one rod having a non-circular cross section is provided, and a moving member on which a workpiece holding device is mounted is slidably fitted to the rod. Then, be guided to move.
[0077]
Further, the shape of the holding projections 116 and 118 of the holding claws 112 provided on the loading holding tool 106 and the unloading holding tool 108 is such that the blank 66 can be moved in the workpiece transfer direction, the workpiece holding device moving direction, and both directions. Any shape may be used as long as it is positioned in three directions perpendicular to the direction, and it is not indispensable to have the inclined surfaces 122 and 124 at the protruding ends, and it is not indispensable to have different lengths. What is necessary is just to be able to perform positioning and holding in the above three directions while the blank or the rough processing gear is raised from the support member.
Further, although the tips of the holding projections 116 and 118 are rounded, a contact resistance may be reduced by attaching a resistance reducing member such as a roller.
[0078]
Further, when the number of holding claws is two as in the above embodiment, the holding tool for loading and unloading is used to hold the holding tool for loading and unloading with the axis of the work piece (blank, rough processing gear, etc.) and the holding tool. There is an advantage that it is easy to realize a state in which the holding tool is concentric with the workpiece and a state in which the holding tool is separated from the workpiece by moving the holding tool in a direction perpendicular to the opening and closing direction of the nail. Is also good. In this case, since the workpiece is supported at three locations, it is not essential that one of the two holding projections provided on the holding claw contact at two points spaced apart in the circumferential direction of the workpiece. Alternatively, the contact may be made at one point in the same manner as the other holding projection.
[0079]
Further, a guide rail for guiding the workpiece holding device may be provided below the processing area. In this case, for example, the guide rail is provided at a position retracted rearward from the front end edge of the bed, and the workpiece holding device is provided so as to extend from the guide rail to the front end side of the bed. Try not to get in the way.
[0080]
In addition, the present invention relates to the above-described FIGS.Shown in 13The components of the embodiments and the components of the embodiments described without using the drawings can be implemented in combination with each other.
In addition, without departing from the scope of the claims, various modifications and improvements can be made to the present invention based on the knowledge of those skilled in the art.
[Brief description of the drawings]
FIG. 1 Claims1 to 4It is a perspective view which shows the conical gear machining apparatus which is one Example common to this invention.
FIG. 2 is a plan view showing the conical gear machining device without a cover and a workpiece holding device.
FIG. 3 is a plan view showing a state in which the conical gear machining device is removed from a cover and a work holding device, and a work spindle is turned to a position where a work spindle is parallel to a work transfer direction;
FIG. 4 is a side cross-sectional view showing a blank which is roughly machined by the conical gear machining apparatus.
FIG. 5 is a front view showing a carry-in shooter and a holding auxiliary device of the conical gear machining device.
FIG. 6 is a side sectional view showing a carry-in shooter and a holding auxiliary device of the conical gear machining device.
FIG. 7 is a front view (partially sectional view) showing the unloading shooter and the workpiece holding device of the conical gear machining device.
FIG. 8 is a side sectional view showing the work holding device.
FIG. 9 is a side sectional view showing a state where the holding member of the holding auxiliary device holds the blank.
FIG. 10 is a front view showing a state in which the blank held by the holding member is lifted from the loading chute.
FIG. 11 is a side view (partial cross section) showing a state in which the loading holder of the workpiece holding device has been moved to a position for holding a blank lifted from a carry-in shooter.
FIG. 12 is a diagram illustrating holding of the blank by the loading holder.
FIG. 13 is a diagram schematically illustrating transfer of a blank and a rough machining gear by the work holding device and delivery to and from the work spindle.You.
[Explanation of symbols]
32: Tool headstock 40: Tool spindle 60: Workpiece spindle 62: Workpiece headstock 66: Blank 69: Workpiece headstock swivel device 92: Guide rail 94: workpiece holding device 106: loading holder 108: unloading holder 150: carry-in shooter 152: carry-out shooter 160: stopper 170: holding assist device 172: guide rail 178: moving member 184: holding member 186: Spring 188: Stopper 190: Supporting part 192: Holding projection 202: Cover 210: Rough gear

Claims (4)

Frame and
A guide rail horizontally fixed and fixed at a position of the frame, which is deviated to one of the upper and lower portions from a processing area where a plurality of workpieces are sequentially processed,
A first moving member movable by being guided by the guide rail;
In its first movement member, the guide rail 2 side by side in a direction parallel to the extending direction of a relatively immovably held, respectively, one by one the plurality of workpieces, their one by one workpiece Two first workpiece holders that are held in a posture in which the axis is horizontal and parallel to a workpiece delivery direction orthogonal to the direction in which the guide rail extends,
A first workpiece that moves the two first workpiece holders in a direction parallel to a direction in which the two first workpiece holders are arranged by moving the first moving member along the guide rail. A holder moving device;
A tool headstock having a tool spindle for holding a processing tool in the processing area and rotating the processing tool around an axis,
A workpiece headstock having a workpiece spindle that holds the workpiece at the same height position as the two first workpiece holders in the machining area and rotates the workpiece about a horizontal axis;
A work headstock swivel device for turning the work headstock around a vertical swivel axis and turning the work spindle to a position inclined with respect to the tool spindle and to a position parallel to the work transfer direction. When,
By moving the workpiece headstock swivel device horizontally and in a direction perpendicular to the direction in which the guide rail extends, the workpiece spindle in a state parallel to the workpiece delivery direction is advanced and retracted. And a workpiece spindle advancing / retreating device for transferring the workpiece to and from the workpiece holder. Frame and
A guide rail horizontally fixed and fixed at a position of the frame, which is deviated to one of the upper and lower portions from a processing area where a plurality of workpieces are sequentially processed,
A first moving member movable by being guided by the guide rail;
In its first movement member, the guide rail 2 side by side in a direction parallel to the extending direction of a relatively immovably held, respectively, one by one the plurality of workpieces, their one by one workpiece Two first workpiece holders that are held in a posture in which the axis is horizontal and parallel to a workpiece delivery direction orthogonal to the direction in which the guide rail extends,
A first workpiece that moves the two first workpiece holders in a direction parallel to a direction in which the two first workpiece holders are arranged by moving the first moving member along the guide rail. A holder moving device;
A tool headstock having a tool spindle for holding a processing tool in the processing area and rotating the processing tool around an axis,
A workpiece headstock having a workpiece spindle that holds the workpiece at the same height position as the two first workpiece holders in the machining area and rotates the workpiece about a horizontal axis;
A work headstock swivel device for turning the work headstock around a vertical swivel axis and turning the work spindle to a position inclined with respect to the tool spindle and to a position parallel to the work transfer direction. When,
By moving the work headstock swivel device horizontally and in a direction perpendicular to the direction in which the guide rails extend, the work spindle in a state parallel to the work transfer direction is moved forward and backward, and the two A workpiece spindle advancing / retreating device for transmitting and receiving the workpiece between each workpiece holder;
In the vicinity of one end of the moving range of the two first workpiece holder, provided obliquely lower as the other end side, the axis is the workpiece of the workpiece and the workpiece transfer direction and a flat row And a carry-in shooter for moving the conical gear processing device inward in a posture such that:
The two first workpiece holders are provided in the vicinity of the other end of the moving range, are inclined higher toward the one end side, and the inner end on the higher side is higher than the inner end of the carry-in shooter. A raised shooter,
A stopper provided at an inner end of the carry-in shooter and stopping movement of the workpiece;
(A) a second workpiece holder for holding the workpiece stopped by the stopper in a posture in which the axis of the workpiece is parallel to the workpiece delivery direction, and (A) provided on the frame, By raising the second workpiece holder, the workpiece held by the second workpiece holder is raised to the same height as the two first workpiece holders and to a height above the stopper. A conical gear machining device, comprising: a workpiece lifting device; and a holding assist device for assisting holding of the workpiece by the first workpiece holder. The second workpiece holder,
A second moving member that is raised and lowered by the workpiece lifting device,
The second moving member is movably held in a direction parallel to the workpiece transfer direction, and a portion protruding from the second moving member toward the carry-in shooter is provided with a support portion larger than a shaft hole of the workpiece. And a holding member provided with a holding projection that holds the workpiece by projecting from the support portion and fitting into the shaft hole;
Urging means for urging the holding member in a forward direction toward the carry-in shooter side;
3. The conical gear machining device according to claim 2, further comprising a stopper that defines a limit of advance of the holding member by the urging force of the urging means. The frame, the guide rail, the first moving member, the two first workpiece holders, the first workpiece holder moving device, the tool headstock, the workpiece headstock, and the workpiece headstock turning. 4. A conical gear machining device according to claim 1, wherein the device and the workpiece spindle advancing / retreating device are covered by a cover, and a part thereof does not protrude outside the cover.

Images