JP2512396B2 - Tray head device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret head device for rotationally indexing an arbitrary spindle into a machining position from a plurality of spindles of a turret head.

2. Description of the Related Art In a conventional turret head device, for example,
As shown in No. 56-20164, a turret head having a substantially trapezoidal cross section is rotatably supported on the main body by an axis inclined with respect to a spindle shaft (rotary main shaft) rotatably supported on the main body, The turret head has a plurality of tools arranged in a comb shape so that when one of them is in a straight line with the spindle shaft, the other tools are in a standby position that is not in a straight line with the spindle shaft. Has been done.
The shaft rotatably supporting the turret head is projected rearward from the upper bottom portion of the trapezoidal cross section of the turret head, and is located on the standby position side of the tool from the axis of the spindle shaft with respect to the main body, that is, a plurality of It is supported at a portion closer to the turret head than the intersection of the axes of the tool.

Problems to be Solved by the Invention According to the above-mentioned conventional technique, since the shaft of the turret head is pivotally supported at the portion closer to the turret head than the spindle shaft, the mutual distance between the tool tips arranged on the turret head is increased. However, there is a problem in that the turret head cannot be downsized and therefore the indexing time cannot be shortened.

Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention supports a turret head on a main body so that the turret head can be indexed and rotated around an inclined axis inclined with respect to the axis of a rotary spindle. In this turret head, a plurality of spindles are provided in the turret head, and when one of the spindles is in a processing position on the axis of the rotary spindle, the other spindle is in a standby position. The turret head comprises a spindle holding portion for arranging a plurality of spindles and a turret shaft extending rearward from a rear portion of the spindle holding portion and having a smaller diameter than the spindle holding portion. Rotate the rear part of the turret shaft to the main body with the bearing provided in the main body so that the base portion of the turret shaft faces the rotating main shaft. In this turret head, a spindle that can be inserted into the turret shaft from the root of the spindle holding portion of the turret shaft to the spindle holding portion, in correspondence with each spindle, when the spindle is in the machining position. It is characterized in that the insertion holes are formed by intersecting each other.

Action According to the above-mentioned structure, the turret head is rotationally indexed about the turret shaft that is pivotally supported on the side of the spindle opposite to the rotation main shaft of the main body, and thus the spindle indexed to the machining position is provided. The rotating spindle is disengaged via a spindle insertion hole provided in the turret head.

Embodiment 1 In FIGS. 1 and 3, reference numeral 1 is a turret head device, which is attached to a column 3 which is in front of, behind, left and right of a machine tool so as to be vertically movable via a guide 5. In the turret head device 1, a main body 7 has a drive motor 9 fixed to the rear portion of the main body 7. The main body 7 is connected to the drive motor 9.
A rotary main shaft 11, which is rotatably supported by, is key-connected. The rotating main shaft 11 comprises a hollow intermediate shaft 13 connected to the drive motor 9 and a transmission shaft 17 having a key groove 15 on its outer periphery. And the transmission shaft 17 is slidable in the axial direction, and
The rotation is transmitted by the intermediate shaft 13. The transmission shaft 17 is rotatably and slidably supported on the front surface of the main body 7, and the axial intermediate portion thereof is rotatably supported by a bearing 25 of a shifter 23 slidably fitted in the guide bar 21. And a pin 27 that is fitted into a fitting hole of a spindle to be described later is embedded in the tip of the transmission shaft 17, and clutch claws 29 are provided on both sides of the pin 27. Is formed. A vertical guide groove 23a is formed in the shifter 23 as shown in FIG. A cam follower 33 at the tip of the clutch lever 31, which is swingably supported at the lower side surface of the main body 7, is rotatably fitted in the guide groove 23a. Another cam follower 37, which is fitted in the cylindrical cam groove 35a of the clutch cam 35, is rotatably supported at the intermediate portion of the clutch lever 31. As shown in FIG. 1, the clutch cam 35 is key-connected to the front portion of the indexing spindle 39 rotatably supported by the main body 7, and between the clutching cam 35 and the small diameter flange portion 39a of the indexing spindle 39. A spring 41 is interposed and urged forward so that when the clutch pawl 29 does not smoothly engage with the clutch pawl of the spindle, it escapes axially rearward. The cylindrical cam groove 35 of this clutch cam 35
a is set to move the shifter 23 back and forth in order to engage and disengage the clutch claw 29 at the tip of the transmission shaft 17 with the clutch claw on the spindle side at the timing shown in FIG. 8 in association with the rotation of the Geneva mechanism described later. The amount of forward and backward movement of the transmission shaft 17 is such that the tip of the transmission shaft 17 is located rearward from a through hole described later when the clutch is completely disengaged.
On the indexing main shaft 39, an intermediate gear 43 in which two gears 43a, 43b having different numbers of teeth are integrated behind the clutch cam 35 is rotated with respect to the indexing main shaft 39 via a pair of bearings 45, 45. A raw wheel 47 of a Geneva mechanism, which will be described later, is provided integrally with the indexing main shaft 39 so as to be freely movably fitted therein and further behind the intermediate gear 43. The rear part of this original vehicle 47 of the indexing spindle 39 is a pinion
51 is formed. As shown in FIG. 7, this pinion 51 is engaged with a rack 57 formed in the rear portion of the main body 7 and carved in the middle of a piston 55 that moves up and down in a cylinder device 53 shown as an indexing drive source. There is.

Next, in FIGS. 1 and 5, 59 is an intermediate shaft rotatably supported by a bracket 61 fixed to the lower part of the main body 7, and its rear end is relatively rotatable by a sector gear 63 via a bearing 65. Is loosely fitted. The sector gear 63 is fixed to a fan-shaped follower 67 of the Geneva mechanism.
And rotatably supported by the main body 7. This slave
A Geneva mechanism 69 is constituted by the 67 and the original vehicle 47, and an indexing cam follower 49 that engages with the indexing groove 67a of the driven vehicle 67 is rotatably supported on the front surface of the original vehicle 47. The driven wheel 67 (that is, the sector gear 63) is rotated by 90 degrees by the engagement between the output cam follower 49 and the indexing groove 67a. Furthermore, the original vehicle
On the front surface of 47, a pressing pin 71 is fixed at a position point-symmetrical to the indexing cam follower 49. When the pressing pin 71 completes the indexing operation at the timing shown in FIG. The position holding portion 67b (or 67c) formed on the straight edge portion of the driven wheel 67 is pressed, and at this time, the cylinder device 53 is kept in a state in which the pressurized fluid is supplied, and the turret head is divided as described later. The outgoing positioning state is maintained. At the rear of the intermediate shaft 59, the driven gear 73 is
Indexing bevel gears 75 are key-connected to the tips, and driven gears 73
Is the gear 43b of the intermediate gear 43, and the sector gear 63 is the intermediate gear 43.
Gear 43a. The number of teeth of these gears is adjusted such that the intermediate shaft 59 is rotated by 18 degrees by rotating the sector gear 63 by 90 degrees.
It is set to rotate 0 degrees.

Next, the turret head 77 will be described. The turret head 77 includes a spindle holding portion 79 having a right-angled triangular shape in a cross section shown in FIG. 1, and a turret shaft 81 extending rearward from a rear portion of the spindle holding portion 79 and having a smaller diameter than the spindle holding portion 79. It is configured. Two spindle cases 87 and 89 that rotatably support spindles 83 and 85, respectively, are attached to this spindle holding portion 79, and when one is in the machining position on the axis of the rotary spindle 17 in FIG. Are arranged at a standby position orthogonal to the above. Each spindle 83, 85 is equipped with a drill D for preparation of a tapped hole and a tap T for processing a screw hole. The turret shaft 81 has bearings 91, 91.
A driven bevel gear 95 that meshes with the indexing bevel gear 75 is key-connected to the rear end of the shaft with the spacer 93 interposed therebetween and is integrally fastened with a bolt 97. The bearings 91, 91 are fitted into the inclined support holes 99 formed on the front surface of the main body 7, and the bearings 91 are pressed from the front by the pressing ring 103 fixed to the main body 7 with the lock screw 101, so that the turret shaft 81 is fixed. A rear portion of the spindle holding portion 79 relative to the attachment portion is rotatably supported, and a turret head 77 is indexably and rotatably supported around an inclined axis inclined by 45 degrees with respect to the axis of the transmission shaft 17. In this supporting state, the spindle holding part of the turret shaft 81
The base of 79 is opposed to the tip of the transmission shaft 17.
The turret head 77 has main shaft insertion holes 79a, 7a through which the conduction shaft 17 can be inserted when the spindle is indexed to the processing position from the root portion to the spindle holding portion 79.
9a are formed so as to intersect with each other, and the intermediate portion of the turret shaft 81 has a part thereof positioned as shown in FIG.
It is formed in the small-diameter portion 81c while leaving 1b. The positioning portions 81a and 81b are stoppers that are screwed into the main body 7 in an adjustable manner.
When they come into contact with 105a and 105b, the spindles 83 and 85 exchange their positions so that one of them is located at the processing position. A through hole 103a is formed in the pressing ring 103 at a position facing the transmission shaft 17. The index spindle 39
A detection plate 107 for detecting the indexing angle is fixed to the rear end of the main body 7, and a proximity switch 109 for detecting the detection plate 107 is arranged at the rear end of the main body 7. Clutch pawls 111 that can engage with the clutch pawls 29 at the tip of the transmission shaft 17 are formed at the ends. In addition, 113 is a vertical feed screw shaft of the turret head device 1.

Next, the operation will be described with reference to FIG. Spindle 83
When the pilot hole machining is completed, the turret head device separates from the work, and an electromagnetic valve (not shown) is switched to supply pressure oil to the lower cylinder chamber 53a of the cylinder device 53.
Then, the piston 55 rises from the lowered position in FIG. 7, and the rack 57 of the piston 55 rotates the pinion 51 of the indexing drive shaft 39 accordingly. As a result, the indexing spindle 39 rotates,
The clutch cam 35 rotates and the original vehicle 47 of the Geneva mechanism 69
Rotates, and the indexing cam follower 49 starts rotating from the position a (15 degrees counterclockwise from the vertically upper position) shown in FIG. Fifteen
When it rotates clockwise to position b, the clutch cam 35
The cam follower 37 is guided by the cylindrical cam groove 35a, and the clutch lever 31 starts swinging rearward from the clutch engagement position A shown in FIG. 2, and this swinging moves the transmission shaft 17 backwards through the shifter 23. The disengagement of the clutch claws 29, 111 starts. Indexing spindle 39 rotates 90 degrees further and indexing cam follower
When 49 reaches the c position, the tip of the transmission shaft 17 moves to the retracted position shown by the chain double-dashed line in FIG. 1, and the indexing cam follower 49.
Starts engaging with the index groove 67a of the follower 67 of the Geneva mechanism. Further, before the indexing main shaft 39 rotates 90 degrees and the indexing cam follower 49 reaches the d position, the driven wheel 67 moves from the P1 position to the P2 position in FIG.
The sector gear 63 is swung 90 degrees, and this rotation is converted into a 180 degree swivel of the intermediate shaft 59 through the intermediate gear 43 and the driven gear 73, and further through the indexing bevel gear 75 and the driven bevel gear 95. Rotate the turret head 77 180 degrees and index. By this swivel indexing, the spindle 83 that has been in the machining position and the spindle 85 that has been in the standby position until now are exchanged, and the tap T is indexed to the machining position (in this state, the tap T is not positioned and fixed in the machining position). . When the indexing cam follower 49 reaches the d position, the indexing cam follower 49 and the Geneva groove 67a are disengaged, and the indexing main shaft 39 is rotated 90 degrees until the indexing cam follower 49 reaches the e position. The engagement of the cylindrical cam groove 35a of 35 and the cam follower 37 causes the clutch lever 31 to move from the retreat position B in FIG. 2 to the clutch engagement position A, and the transmission shaft 17 and the clutch claws 29 of the spindle 85,
111 meshes. At this time, if the clutch pawls 29, 111 do not mesh smoothly, the clutch cam 35 escapes axially rearward against the spring 41, and meshes when the transmission shaft 17 rotates at the start of processing. When the indexing spindle 39 is further rotated and the pressing pin 71 of the original vehicle 47 is pressed by the position holding portion 67c of the driven wheel 67 (f position rotated by 15 degrees), the turret head 77
The positioning portion 81b of the cylinder device 53 is brought into contact with the stopper 105b, and the piston 55 of the cylinder device 53 is held by the electromagnetic valve (not shown) while being pressurized in the ascending direction at its substantially ascending end. Accordingly, the pressing pin 71 locks the driven wheel 67 at the position P2, and the spindle 85 is positioned and held at the processing position. In order to index the drill D to the processing position again, the operation opposite to the above operation may be performed.

In this embodiment, since the two spindles are mounted on the turret head at an angle of 90 degrees, the spindle at the standby position does not project in the work direction at all when one of them is at the processing position. Interference can be avoided, and there is an advantage that it is not restricted by the shape of the work.

Further, since the turret head having two spindles has been described above, the turret head can be made extremely small, but a turret head having more spindles may be used. Also, the positioning device has a structure that does not move the turret head in the axial direction during the indexing operation, so that the indexing time can be further shortened, but this is often found in the conventional and relatively large turret head devices. Such a turret head moves in the axial direction, and the positioning pin moves in the axial direction of the rotation axis of the turret head to perform positioning.

As described above, according to the present invention, the turret head is supported by the main body so as to be indexably rotatable about an inclined axis inclined with respect to the axis of the rotating main shaft, and the turret head has a plurality of spindles. In a turret head device in which one spindle is arranged at a processing position on the axis of the rotating main shaft and the other spindle is arranged at a standby position, the turret head is provided with a spindle holder for disposing a plurality of spindles. A turret shaft having a diameter smaller than that of the spindle holding portion is provided to extend rearward from the rear portion of the spindle holding portion,
The turret head is rotatably supported on the main body by a bearing provided on the main body so that the base portion of the turret shaft with respect to the spindle holding portion faces the main rotation shaft, and the rear portion of the base portion of the turret shaft is rotatably supported by the main body. In the head, from the root part of the turret shaft to the spindle holding part to the spindle holding part, corresponding to each spindle, main shaft insertion holes through which the rotary main shaft can be inserted are intersected with each other when the spindle is in the processing position. Since the turret head is provided by drilling, the plurality of spindles arranged in the turret head can be arranged very close to each other in the turret head, and the turret head can be downsized and high-speed indexing can be performed. Further, even if the turret head can be miniaturized in such a manner, the turret head is provided with intersecting spindle insertion holes through which the rotary spindle is inserted from the root portion of the turret shaft with the spindle holding portion to the spindle holding portion, The rigidity of the turret shaft can be increased by increasing the solid part in the rear part of the turret shaft, which is supported by the main body. Further, since the turret shaft has a small diameter with respect to the spindle holding portion, the size of the main body portion supporting the turret shaft can be reduced, which can contribute to downsizing of the entire turret device.

[Brief description of drawings]

FIG. 1 is a developed sectional view of a turret head device according to the present invention, FIG. 2 is an external side view of the turret head device, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is II of FIG. A sectional view, FIG. 5 is a sectional view taken along the line II-II of FIG. 1, and FIG. 6 is a sectional view taken along the line III-I of FIG.
II sectional view, FIG. 7 is a IV-IV sectional view of FIG. 2, and FIG. 8 is a timing chart of the indexing operation. 1 ... Turret head device, 7 ... Main body, 11 ... Rotating spindle, 47 ... Original vehicle, 53 ... Cylinder device, 67 ... Slave vehicle, 67
b ・ 67c …… Position holding part, 71 …… Pressing pin, 77 …… Turret head, 79 …… Spindle holding part, 79a …… Main shaft insertion hole, 81 …… Turret shaft, 81a ・ 81b …… Positioning part, 105a
・ 105b …… Stopper

Claims (1)

(57) [Claims] 1. A turret head is supported by a main body so as to be indexably rotatable about an inclined axis inclined with respect to an axis of a rotary spindle, and the turret head has a plurality of spindles, one of which is one of the rotary spindle. In a turret head device in which another spindle is arranged so as to be in a standby position when it is in a processing position on an axis, a turret head is provided with a spindle holding portion for arranging a plurality of spindles and a rear portion of the spindle holding portion. And a turret shaft having a diameter smaller than that of the spindle holding portion, and the turret head is formed so that the root portion of the turret shaft with respect to the spindle holding portion faces the rotating main shaft. The part behind the part is rotatably supported on the main body by the bearings provided on the main body. From the root portion of the holding portion to the spindle holding portion, corresponding to each spindle, main shaft insertion holes through which the rotary main shaft can be inserted when the spindle is in the processing position are formed by intersecting each other. And turret head device.