JPS6348325Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a raw jaw jig adapter for replacing a raw jaw jig for machining a raw jaw using a conveying device in a machine tool.

Generally, in machining using a raw jaw in a machine tool, in order to obtain high accuracy, a part of the raw jaw is machined to the standard diameter in advance, and the raw jaw is machined to the standard diameter before machining is performed using the raw jaw. The green jaw jig having the corresponding diameter is gripped by the reference gripping part of the green jaw to center the green jaw, and the green jaw is machined to have a diameter corresponding to the chucking diameter of the target workpiece. When processing raw nails in this way, the raw nails that are usually prepared include several raw nails,
Select a jig whose chuck portion has a diameter that is slightly larger than the chuck diameter of the target workpiece when the jig having the standard diameter is gripped, and attach it to the chuck. Therefore, as the types of workpieces to be machined by machine tools become more diverse and the chuck diameter of the workpieces becomes wider, the number of types of green jaws that are prepared increases. As a raw nail jig, as the number of types of raw nails increases, it becomes inappropriate to machine all of these raw nails with the same reference diameter.
It is necessary to prepare two or more green nail jigs with different diameters.

In the case where a plurality of natural nail jigs are prepared in this way, the work of attaching and detaching the natural nail jig to the natural nail, including the work of selecting the natural nail jig, has conventionally relied on manual labor. However, in recent years, there has been a growing trend toward unmanned and systemized machine tools, and with the automation of machine tools, automation of the work of attaching and detaching jigs is also required. In an automated machine tool, when attempting to attach and detach a green jaw jig using a transport device used to attach and detach a workpiece to and from the machine tool, such as a robot, the range in which the robot hand can open and close is limited. Although it is usually limited to a narrow range that includes the target workpiece diameter, the diameter of the free jaw jig, that is, the standard diameter, is much smaller than the workpiece diameter, and the opening/closing amount of one robot hand is limited to many types. In many cases, it becomes impossible to grip the free-jaw jig. Therefore, when the robot hand cannot grip the raw nail jig, it is necessary to replace the robot hand or to widen the reference diameter portion of the raw jaw to the diameter of the raw nail jig that can be gripped by the robot hand.

Furthermore, even if a workpiece with a certain width is to be gripped with an outer diameter smaller than the diameter of the workpiece, there are many different diameters of the jig, and the stroke range of the robot hand is finally limited. will not be able to cope with it.

Furthermore, if an attempt is made to grasp the inner diameter part of the unformed jaw jig with a robot hand, the difference in diameter from the unformed jaw jig will become large, requiring replacement of the robot hand, resulting in a decrease in efficiency.

The present invention was developed in view of the above circumstances, and its purpose is to automate the machining of soft jaws with high processing efficiency.The purpose of this invention is to automate the machining of green jaws with high processing efficiency. It is an object of the present invention to provide a jig for growing nails that can be used in common and selectively, and an adapter thereof.

In order to achieve the above-mentioned object, the present invention provides a soft jaw jig adapter which is used to attach a raw jaw jig that engages with a chuck reference surface to a chuck by a conveying device such as a robot hand, and which is used for attaching a raw jaw jig that engages with a chuck reference surface to a chuck. a gripped part having an outer diameter approximately equal to the outer diameter of the workpiece to be gripped and gripped by the gripping part of the conveying device; The present invention is a green nail jig adapter characterized by comprising an engaging portion that is detachably engaged with the green nail jig by axial movement and has a pressing means that maintains an engaged state with respect to the green nail jig.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Figure 1 shows chuck 1 of machine tool 1.
FIG. 3 is a partially sectional side view showing a green nail jig 3 of the present invention held by a green nail 2 attached to a, and an adapter 4 engaged with the green nail jig 3; Raw nails 2
has a standard gripping part 2a for gripping the free-jaw jig 3, and is machined to have a standard diameter _d1 . In addition, the gripping portion 2b having a larger diameter has a larger diameter than the chucking diameter of the target workpiece when the gripping portion 2a having a smaller diameter grips the green jaw jig.
It is formed to have a diameter d ₃ that allows for machining allowance in advance for machining to d ₂ .

The natural nail jig 3 is a disk having an outer circumferential portion 3a with an outer diameter equal to the standard diameter _d1 , and the outer circumferential portion 3a has a storage shelf 5a provided for the stocker 5 of the natural nail jig shown in FIGS. 2 and 3. An annular groove 3b is provided which is slidably engaged with the groove 3b. Further, a through hole 3c is concentrically formed in the center of the green nail jig 3, and a groove 3d is formed in the center of the inner peripheral surface of the through hole 3c. The shape and dimensions of the through hole 3c and the groove 3d are the same in all the nail jigs 3 when two or more jigs with different outer diameters are prepared. The through hole 3c and the groove 3d form an engaging portion 3e for the adapter 4.

The adapter 4 has a flange or gripping portion 4b having an outer circumferential surface 4a with an outer diameter D approximately equal to the outer diameter d ₂ of the workpiece to be chucked with the green jaws 2, and a stepped protrusion 4c protruding from the gripping portion 4b. have Projection 4c
The tip end thereof is an engaging portion 4d having a diameter that fits into the through hole 3c of the natural nail jig 3. In the engaging portion 4d, a ball 4e that fits into the groove 3d of the green nail jig 3 in a state where the engaging portion 4d is fitted into the through hole 3c is attached to a spring 4f that constitutes a pressing means together with the ball 4e. A plurality of them are built in, for example, at three equal intervals on the circumference, and are biased outward in the radial direction. 4g is a pin or machine screw that holds the spring 4f. Therefore, the free nail jig 3 and the adapter 4 are
If the relative movement in the axial direction exceeds a certain force determined by the force f, the engagement will be disengaged, but normally the ball 4
The engagement between the free-jaw jig 3 and the adapter 4 is maintained by the fit between the groove 3d and the groove 3d.

Next, a description will be given of an operation using the soft nail jig 3 and adapter 4 according to the present invention. A large number of fresh nail jigs 3 having different outer diameters corresponding to different reference diameters d ₁ are housed in a stocker 5 as shown in FIGS. 2 and 3. Further, in FIGS. 2 and 3, reference numeral 6 exemplifies a robot used to attach and detach workpieces of a workpiece stocker (not shown) to and from the machine tool 1. The robot 6 is the base 6
a, movement in the X, Y, and Z directions and A, B using the column 6b, arm 6c, and hand 6d as the main structures
Directional rotation can be performed. When machining a workpiece using a raw jaw in the machine tool 1, when starting raw jaw machining or when changing the type of workpiece, attach the raw jaw 2 to the chuck 1a manually or automatically, and then remove the workpiece. Before mounting the adapter 4, use the hand 6d of the robot 6 to grip the adapter 4, and use the hand 6d to position the engaging portion 4d of the adapter 4 on the same axis as the raw jaw jig 3 of the desired diameter on the storage shelf in the stocker 5. When the hand 6d is moved in the axial direction to engage the through hole 3c of the nail jig 3, the adapter 4 engages with the jig 3. Next, when the arm 6c is made to perform a contracting operation, the green nail jig 3 is taken out from the stocker 5 while being engaged with the adapter 4. Rotation and vertical movement of arm 6c and hand 6
By combining the rotation d with the extension and contraction of the arm 6c and the movement of the column 6b if necessary, the raw nail jig 3 is positioned between the raw nails 2, and after the raw nail jig 3 is closed and the chuck of the raw nail jig 3 is finished, the hand 6d is moved. When the column 6b is moved in the Z-axis so that it moves in the axial direction, the adapter 4 disengages from the free-jaw jig 3. The hand 6d holding the adapter 4 is retracted,
The gripping portion 2b of the green jaw 2 is machined to have a diameter equal to the chucking diameter _d2 of the target workpiece. Next, the hand 6d of the robot 6 is moved in the Z direction, the adapter 4 is engaged with the raw nail jig 3 on the chuck 1a, and the raw nail jig 2 is opened. Return tool 3 to stocker 5,
The adapter 4 is stored in a predetermined storage position. The robot 6 attaches the workpieces to the chuck 1a and processes each workpiece. Thereafter, each time the type of target workpiece changes, the raw nail is replaced or the raw nail is not replaced, and the raw nail machining is performed using the raw nail jig and adapter in the same manner as described above.

In addition, as a stocker for the raw nail jig, in addition to the stocker shown in FIG.
You may use the stocker 7 provided with b. In this case, it is possible to use a non-grooved jig 3 that does not have a groove on its outer periphery.

As is clear from the above description, the present invention uses a robot that attaches and detaches a workpiece to a machine tool, and uses an adapter to attach and detach various types of green jaw jigs to the chuck, thereby making it possible to automate the machining of green jaws. Furthermore, it exhibits excellent effects that can be applied to automation, including unmanned operation of machine tools at night. Also,
Since the outer diameter of the adapter is almost the same as the outer diameter of the workpiece, there is no need to replace the robot hand after the raw jaw jig and adapter are transferred to the stocker after the raw jaw machining is completed, and the workpiece can be transferred immediately. Since it can be transferred, there is also the effect that machining efficiency is not reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially sectional side view, Fig. 2 is a partially sectional front view showing the state of use, Fig. 3 is a plan view of Fig. 2, and Fig. 4 is a raw nail. It is a perspective view showing a modification of a jig and a stocker. 3... Free-jaw jig, 3a... Outer periphery, 3e... Engaging part, 4... Adapter, 4b... Gripping part, 4d...
...Engagement part, 4e...Ball, 4f...Spring.

Claims (1)

[Scope of utility model registration request] An adapter for transporting a free-jaw jig that is attached to and detached from a chuck of a machining machine tool using a transport device,
a gripped part that has an outer diameter approximately equal to the outer diameter of the workpiece to be gripped by the chuck and is gripped by the gripping part of the conveying device; A green nail jig adapter comprising: an engaging part that is detachably engaged with the engaging part by axial movement, and has a pressing means that maintains an engaged state with respect to the green nail jig.