JP2006130609A - Tilting jig for machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tilting jig which is constructed by mounting a jig plate for firmly holding a workpiece on a rotating shaft for supporting rotation of the jig plate in one body, and arranging a rotary joint serving as a pressure oil feeding channel to a cylinder arranged on the jig plate between support devices for supporting the rotating shaft of the jig plate, to thereby achieve space saving thereof. <P>SOLUTION: According to the structure of the tilting jig 1, an annular groove 39 serving as the pressure oil feeding channel is formed in the rotating shaft 16 arranged between the support devices 19, 20 for rotatively supporting the jig plate 3 of the tilting jig 1, and the rotary joint 35 is connected to the annular groove 39, to thereby achieve space saving of the entire width of the tilting jig 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tilt jig of a machine tool capable of changing a machining posture for fixing a workpiece to a jig plate and turning and rotating the jig plate to perform machining from five directions. .

  A jig plate mounted on a tilt jig of a conventional machine tool is supported by a turning spindle, and the jig plate is turned as a pressure oil supply passage to a cylinder of a jig device for fixing and releasing a workpiece. It has been usual to arrange a rotary joint outside the supporting device to be supported. The reason is that by making the jig plate substantially the same as the pivot axis, it is possible to stabilize the weight balance by turning and to ensure a large turning angle.

  However, when the workpiece has a relatively large and complicated shape, for example, as disclosed in the tilt jig devices of Patent Document 1 and Patent Document 2, the work chuck mechanism and the clamp mechanism become complicated, and therefore the number of actuators such as cylinders is increased. In addition, a large number of pressure oil supply piping members are inevitably required. For this reason, the rotary joint disposed outside the jig plate support device becomes larger and the space occupied by the tilt jig becomes wider.

Furthermore, since a space occupied by a hose as a pressure oil supply piping member for the rotary joint is also required, the jig device becomes large, and it is not easy to assemble the index device for changing the work posture. Further, when the jig device becomes large with respect to the workpiece, chips generated by machining of the tool remain on those members and hinder the loading and unloading of the workpiece.
Japanese Patent Laid-Open No. 10-58254 JP 2000-280131 A

The present invention has been made paying attention to such problems existing in the prior art.
The purpose is to provide a jig plate integrally on a turning support shaft that supports the turning of the jig plate that holds and holds the workpiece, and to fix a rotary joint as a pressure oil supply passage to a cylinder provided on the jig plate. It is an object of the present invention to provide a tilt jig for a machine tool provided inside a support device for supporting a pivot support shaft of a tool plate to save space.
Further, a tilt jig with reduced space is installed on the index device, and the jig plate is rotated and indexed to widen the processing surface.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a support device for pivotally supporting the pivot support shaft at both ends on the mounting base, and fixing and releasing the workpiece on the pivot support shaft. In a tilt jig integrally provided with a jig plate having a plurality of cylinders, a piping member as an oil passage for supplying pressure oil to the plurality of cylinders is provided between the mounting base and the pivot support shaft. A tilt jig for a machine tool, characterized in that an annular groove serving as an oil passage is provided on the pivot support shaft, and a rotary joint surrounding the annular groove is provided inside the support device.

According to a second aspect of the present invention, there is provided a tilt jig for a machine tool, characterized in that the mounting base according to the first aspect is installed on an indexing device for rotationally indexing and converting a workpiece machining direction.

In the tilt jig of the present invention, a jig plate is arranged on a turning support shaft, and a rotary joint as a pressure oil supply passage to a cylinder provided on the jig plate is connected between the left and right support devices of the turning support shaft. Since there is no rotary joint on the outside of the left and right support devices in the configuration provided on the inner side, the protrusions including the oil hose are reduced as much as possible on the outer side of the support shaft device, and the chips etc. due to processing tilt. There is little influence on the apparatus, and a space saving tilt jig apparatus can be configured as the entire machine.
In addition, since the mounting base is installed on an indexing device that performs rotational indexing of the work and changes the work direction of the workpiece, a tilting device capable of multi-face machining of the workpiece by performing rotational indexing of the jig plate while saving space can be configured.

The swivel support shaft of the jig plate is supported by the left and right support devices so as to be able to swivel, and the pressure oil is jigged through a rotary joint in an annular groove as an oil passage provided in the swivel support shaft between the support devices. The tilt jig was designed to save space by using a structure that supplies it to the plate.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is an overall outline view of a tilt jig 1 of a crankshaft processing machine. On the mounting base 2, support devices 19 and 20 having bearings 17 and 18 on the left and right sides are provided for turning and supporting the turning support shaft 16 of the jig plate 3. A jig plate 3 having a large number of cylinders for fixing and holding a workpiece W, which is a crankshaft, is formed integrally with the turning support shaft 16, and the turning support shaft 16 is supported by the support devices 19 and 20 so as to be turnable. Yes.

First, the jig plate 3 that holds the workpiece W will be described. The jig plate 3 is a two-piece picking device for the workpiece W. As a set of workpiece mounting jig devices, the workpiece receivers 4 and 4, the workpiece shift device 5, the chuck device 6, the indexing device 7, and positioning. Since it is composed of the apparatus 8 and both have the same mechanism, only one explanation will be given.
On the jig plate 3, the work W is transported by a transport device (not shown) and placed on the work receivers 4 and 4 provided in the work shift device 5.
The work shift device 5 is directed toward the chuck device 6 by contacting the right end of the work W with the center 21 provided in the work shift device 5 by the operation of the shift cylinder 42 with the work W placed on the work receivers 4 and 4. The work W is lightly sandwiched between the chuck device 6 and the center 21 by moving left to a predetermined position.

FIG. 2 is a right side cross-sectional view of the jig plate 3 of FIG. 1, and the workpiece W positioning device 8 will be described.
When the workpiece W is moved to the chuck position by the workpiece shift device 5, the positioning of the workpiece W in the radial direction is performed by opening and closing the positioning claws 9, 9 provided on the plate 3.
The positioning cylinder rod 10 is moved up and down by the operation of the positioning cylinder 41 provided at the lower part of the jig plate 3. The worm gear 11 meshed with the cylinder rod 10 is rotated by the ascending / descending operation, and the positioning claws 9, 9 assembled integrally with the worm gear 11 are opened / closed as shown by the solid line and the two-dot chain line in the drawing, and the crank pin 12 of the work W As a result, the journal 13 of the workpiece W supported on the workpiece receiver 4 serves as a rotation axis, and the posture of the workpiece W in the radial direction with respect to the workpiece receiver 4 is determined.

An indexing device 7 is disposed on the jig plate 3 on the left side of FIG. 1, and a chuck device 6 is assembled in front of the indexing device 7. When the posture of the workpiece W in the radial direction is determined, the journal portion of the workpiece W is chucked by the operation of the chuck cylinder 43.
A chuck device 6 is provided in front of the indexing device 7, and indexing is performed by driving the motor 22 so that the work surface of the workpiece W faces the tool 14 of the spindle device 15 in a state where the workpiece W is chucked. Yes.

FIG. 3 is a left side view of FIG. 1. A turnover cylinder 24 for turning the jig plate 3 is provided at the center of the mounting base 2, and the support shaft 25 and the jig plate 3 provided on the mounting base 2 are provided. The jig plate 3 is turned around the turning support shaft 16 by connecting the provided support shaft 26 and extending and retracting the cylinder rod 27.

Next, the pressure oil supply passage to the cylinder devices arranged on these jig plates 3 will be described.
In the central part of the mounting base 2 and the index device 44 in FIG. 2, there are a plurality of electromagnetic switching valves 32 a to 32 e and a rotary joint 46 including a pipe for supplying pressure oil from the oil tank 30 and the pressure oil pump 31 and a drain pipe for releasing the oil. Connected through.
As shown in FIG. 1, the oil supply to the mounting base 2 and the jig plate 3 is made up of a plurality of pipes arranged in a straight line parallel to each other between the mounting base 2 and the rotary joint 35 provided on the outer periphery of the turning support shaft 16. The members 34a to 34j are connected to each other and oil passages 36a to 36j are provided therein.
FIG. 4 is an enlarged detailed view of the rotary joint 35 of FIG. 1, and the rotary joint 35 is provided inside the support shaft devices 19 and 20 as shown in the figure. A plurality of annular grooves 39a to 39j are formed on the inner periphery of the rotary joint 35, and oil passages 37a to 37j are formed so as to correspond to the respective annular grooves 39a to 39j. Connected to two ports of positioning cylinders 41 and 41a, work shift cylinders 42 and 42a, and chuck cylinders 43 and 43a through oil passages 38a to 38j provided in the jig plate 3 corresponding to these 37a to 37j. Has been.

Next, the operation of the tilt device 1 configured as described above will be described.
In FIG. 1, two crankshafts, which are workpieces W, are carried from a conveying device (not shown) and placed on the workpiece receivers 4, 4 of each workpiece shift device 5. Next, when the work shift device 5 moves to the left, the center 21 attached to the work shift device 5 comes into contact with the right end of the work W and moves to a position where the left end of the work W is pressed against the chuck device 6. Next, the positioning claw 9 of the workpiece positioning device 8 sandwiches the pin portion 12 of the crankshaft by driving the positioning cylinder 41 and positions the workpiece rotation posture. Subsequently, the chuck device 6 chucks the left end journal portion of the workpiece W. Next, the positioning claws 9 and 9 are opened, and machining is started by the operation of the spindle device 15.
The machining posture is changed by rotating the jig plate 3 by 90 degrees by the rotation operation of the index device 44, thereby converting the workpiece posture. Further, when the rod 27 of the turnover cylinder 24 is contracted, the jig plate 3 becomes vertically oriented, the workpieces W and Wa are arranged vertically, and the spindle device 15 approaches from the side surfaces of both workpieces so that the tool 14 moves the workpiece W. Five surfaces can be processed.

Thus, the pressure oil to each cylinder provided in the chuck device 6 provided in the jig plate 3 passes through the piping members 34 a to 34 j, the rotary joint 35, and the oil passages 38 a to 38 j in the jig plate 3. Supplied. Since the rotary joint 35 is disposed on the inner side between the support devices 19 and 20 of the turning support shaft 16, the entire width of the tilt jig 1 can be made considerably narrower than that of the conventional configuration, contributing to space saving. To do. As a result, the chips generated from the machining by the tool 14 do not remain in the rotary joints and their hoses as in the prior art.
Further, the space saving can facilitate the installation of the tilt jig on the index device that converts the machining surface of the workpiece, and the machining range can be widened.

Overall view of tilt jig Posture positioning diagram Tilt device drive configuration diagram Detailed view of rotary joint oil passage

Explanation of symbols

1 Tilt jig 2 Mounting base 4 Work receiving 5 Work shift device
6 Chuck device 8 Positioning device 15 Spindle device 16 Rotating support shafts 19 and 20 Support devices 32a to 32e Electromagnetic switching valves 34a to 34j Piping member 35 Rotary joint 44 Index device

Claims (2)

A tilting device in which a support device is provided at both ends of the mounting base so as to be capable of pivoting the pivot shaft, and a jig plate having a plurality of cylinders for fixing and releasing the workpiece is integrally provided on the pivot shaft. In the jig, a piping member as an oil passage for supplying pressure oil to the plurality of cylinders is provided between the mounting base and the turning support shaft, and an annular groove as an oil passage is provided in the turning support shaft, A tilt jig for a machine tool, wherein a rotary joint that surrounds an annular groove is provided inside the support device.
A tilt jig for a machine tool, characterized in that the mounting base according to claim 1 is installed on an indexing device for rotationally indexing and converting a machining direction of a workpiece.

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