JPH0236685Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a device that automatically attaches and detaches a drive fitting (turner) to and from a workpiece processed by a cylindrical grinder, lathe, or the like.

[Prior Art] Normally, a driving metal (turning metal) is manually attached to and removed from a workpiece processed by a cylindrical grinder, a lathe, or the like. In addition, special purpose-built machines are equipped with an automatic dog on the headstock, and are used to carry in and out of workpieces.

[Problems that the invention aims to solve] The manual work of attaching and detaching drive fittings is an obstacle to automation of machine tools. cannot be applied to

This invention provides a device that automatically attaches and detaches a drive fitting (driver) equipped with a spring force-operated tightening lever to and from a workpiece before and after attaching and detaching the workpiece to the main shaft of a machine tool. be.

[Means for Solving the Problems] The drive fitting attaching/detaching device according to this invention has a hollow hole formed therein, a support stand for supporting the workpiece and the drive fitting, and a support stand below the support stand that is coaxial with the hollow hole. It consists of a rotating shaft that is rotatably supported by and driven by an indexing motor.

The hollow hole allows workpieces to be moved in and out in the axial direction with a drive fitting (driver) equipped with a spring force-operated tightening lever used for center work on standard general-purpose cylindrical grinders and general-purpose lathes. It is formed so as to be freely movable, and a support piece portion is formed at the lower part thereof to prevent rotation of the drive metal fitting and support it.

An operating pin that engages with a tightening lever of a drive fitting supported at the lower part of the hollow hole is eccentrically implanted at the top of the rotating shaft below the support base.

[Operation] The machined workpiece with the drive fitting still attached is removed from the machine tool and inserted into the hollow hole of the support base in the axial direction with the drive fitting facing down. Then, the rotating shaft rotates, causing the actuation pin to rotate the tightening lever against the spring force, and the drive fitting to the released state.

The machined workpiece is pulled upward and carried out with the drive fitting remaining in the lower part of the hollow hole.

The green workpiece is then inserted into the hollow hole and its end is inserted into a drive fitting supported in the lower part of the hollow hole. Then, the rotating shaft rotates in the opposite direction, allowing the operating pin to rotate due to the spring force of the tightening lever. A drive fitting is thereby attached to the end of the green workpiece. The unprocessed workpiece is then pulled up from the hollow hole with the drive fitting still attached, and transported and mounted on a machine tool.

[Example] An example of this invention will be described according to the drawings. The drive fitting attachment/detachment device is installed near a machine tool such as a cylindrical grinder or lathe, and is shown in Figures 1 and 2.
As shown in the figure, an unprocessed workpiece support station 1, a drive fitting attachment/detachment station 2, and a processed workpiece support station 3 are arranged in this order. Each station is equipped with an A support stand 4, a B support stand 5, and a C support stand 6, and each support stand has hollow holes 7, 8, and 9 in the vertical direction, and a part of the upper end is cut out. , A, B, and C proximity switches 10, 11, and 12 for confirming the presence of a workpiece are installed toward the workpiece. Each support base is designed to support a workpiece inserted into its hollow hole. For example, in the case of a workpiece with a flange as shown in Figure 1, it is supported at the upper stage. I'm starting to do that.

The A support stand 4 and the C support stand 6 are of the same shape, but the B
The support base 5 has a special structure to allow attachment and detachment of the drive fittings as will be described later.

Prior to explaining the B support stand 5, the drive fitting 13 that is attached to and detached from the workpiece using this device will be explained with reference to FIG.

The ring body 14 of the drive fitting 13 has support bolts 15, 16 and a rotation pin 1 radially arranged at three locations in the circumferential direction.
7 is implanted, and a tightening lever 20 whose inner end is an eccentric cam 19 is pivotally attached to the ring body 14 by a pivot pin 18, and is rotated counterclockwise in FIG. is rotated elastically.

Then, the end of the workpiece inserted into the ring body 14 is gripped by the support bolts 15, 16 and the elastically rotated eccentric cam 19, and the drive fitting 13 can be attached to the workpiece. ing.

The outer end of the clamping lever 20 is adapted to engage the drive pin of the drawing board when the workpiece is mounted on the machine tool spindle.

Now, B in the drive bracket attachment/detachment station 2.
To explain the support stand 5, its hollow hole 8 is as follows.
The ring body of the drive fitting 13 attached to the workpiece has a diameter large enough to allow it to be moved in and out from above together with the workpiece. A part of the peripheral wall of the support base 5 is cut out in the vertical direction so that the tightening lever 20 of the drive fitting 13 can pass therethrough.

In the lower part of the hollow hole 8, there are support pieces 22, 22 that protrude in the radial direction, and together with the similarly implanted positioning bolt 23, support the ring body 14 of the drive fitting 13 in a fixed position. Further, one of the support pieces 22 is adapted to engage with a rotation stop pin 17 implanted in the ring body 14.

A rotary shaft 24 is rotatably supported below the B support base 5 in a coaxial relationship with the hollow hole 8.
The upper part is a rotating plate 25, and the drive fitting 13
An operating pin 26 that engages with the tightening lever 20 is eccentrically implanted. The lower end of the rotating shaft 24 is connected to an indexing motor 27 with a speed reducer, and the intermediate portion has D and E proximity switches 28 and 29 disposed at two locations in the circumferential direction around the rotating shaft 24. A and B dogs 30 and 31 are attached to be operated respectively.

The D proximity switch 28 and the A dog 30 are used to confirm the removal of the drive fitting, and the E proximity switch 29 and the B dog 31 are used to confirm the attachment of the drive fitting.

Then, a program-controlled robot carries out the loading to the A support stand, the transport between all the support stands and the machine tool, and the unloading from the C support stand.

The operation and function of the above-mentioned drive fitting attachment/detachment device will be described.

First, when the machining is completed by the machine tool, the robot moves the drive fitting 13 in response to the machining completion signal from the machine tool.
The machined workpiece with the attachment attached thereto is gripped, transported from the machine tool to the B support stand 5, and inserted into the hollow hole 8 with the drive fitting 13 facing downward. The workpiece is supported on the B support stand 5, but since the main shaft of the machine tool stops rotating at a fixed angular position, the angular position of the workpiece to be gripped, conveyed, and inserted by the robot,
That is, since the angular position of the drive fitting 13 is also maintained at a fixed position, the tightening lever 20 also passes through the notch in the support base B, and the ring body 14 is supported at a fixed position by the support pieces 22, 22 and the positioning bolt 23. be done.

At this time, the rotating shaft 24, that is, the rotating plate 25 is at the most counterclockwise rotated position shown in FIGS. 4 and 5.

The indexing motor 27 is started by the workpiece insertion end signal from the robot side and the workpiece confirmation closing signal from the B proximity switch 11, and the rotating shaft 24, that is, the rotating plate 25
rotates by a certain angle clockwise. Meanwhile, the actuating pin 26 engages the clamping lever 20 and rotates it clockwise around the pivot pin 18 against the spring force of the scissor-shaped spring 21. The eccentric cam 19 then releases the workpiece end from its grip. At this time, the D proximity switch is closed by the action of the A dog 30 to issue a signal confirming the removal of the drive fitting. Based on this signal and the workpiece absence open circuit signal of the C proximity switch 12 of the next C support stand 6, the robot pulls up the processed workpiece from the B support stand 5 and inserts it into the hollow hole 9 of the next C support stand 6. The machined workpiece is supported on the C support stand 6. Needless to say, the ring body 14 of the drive fitting 13 remains on the support piece 22 at the lower part of the hollow hole 8 of the B support base 5 in an open state.

Next, the robot receives the workpiece insertion operation completion signal from the robot side and the workpiece confirmation close signal from the proximity switch 10 of the A support stand 4, and the robot removes the next workpiece that was already loaded onto the A support stand 4 while machining the previous workpiece. The unprocessed workpiece is pulled up from the hollow hole 7 of the A support stand 4 and inserted into the hollow hole 8 of the B support stand 5.
It is supported on the support 5 and the end of the workpiece is inserted into the ring 14 in the open state.

Upon receiving the workpiece insertion operation end signal from the robot side and the workpiece confirmation closing signal from the B proximity switch 11, the indexing motor 27 is started, and the rotating shaft 24, that is, the rotating plate 2
5 is rotated counterclockwise in FIGS. 4 and 5 by a certain angle. At that time, the tightening lever 20 is
The unprocessed workpiece is rotated counterclockwise by the spring force of the scissor-shaped spring 21, and the end of the unprocessed workpiece is gripped by the support bolts 15, 16 and the eccentric cam 19. That is, the drive fitting 13 is attached to the unprocessed workpiece.

At that time, the robot pulls up the unprocessed workpiece to which the drive fitting 13 is attached from the hollow hole 8 of the B support base 5 and attaches it to the main shaft of the machine tool, in response to the driving metal attachment confirmation signal from the E proximity switch 29 from the B dog 31. do. Then, the drive pin of the face plate of the rotating main shaft engages with the outer end of the tightening lever 20 of the drive fitting 13, and the workpiece is rotated and machined.

During this machining, the robot pulls up the machined workpiece supported on the C support base 6 and carries it out, in response to the main spindle mounting operation completion signal from the robot side and the workpiece confirmation closing signal from the C proximity switch 12. The robot side unloading operation end signal and the A proximity switch 10 are activated.
In response to the workpiece absence open circuit signal, the unprocessed workpiece is carried from the storage pallet to the A support stand 4 and inserted into the hollow hole 7.

Thus, the robot waits until the machining on the machine tool is completed, and the above operations are repeated.

To carry the workpiece into and out of the B support stand 5,
Robotic operation is not always necessary, and
The A and C support stands 4 and 6 can also be omitted.

Loading and unloading by robots is highly automated, and by installing A and C supports 4 and 6 adjacent to B support 5, machining down time for loading and unloading workpieces to and from the machine tool can be further reduced. It can be shortened.
Furthermore, although it is not essential to provide the A, B, and C proximity switches 10, 11, and 12, troubles caused by incorrect grasping of the robot can be avoided by using them.

[Effects of the invention] When performing center work with machine tools such as cylindrical grinders and lathes, this invention makes it possible to automate the installation and removal of workpieces in order to automate the machine tools. This enables efficient automation by automatically attaching and detaching drive fittings so that automatic attachment and detachment of workpieces can be applied to general-purpose machine tools with standard specifications that cannot be equipped.

[Brief explanation of drawings]

1 is a partially sectional front view of the drive fitting attachment/detaching device according to this invention, FIG. 2 is a plan view of the drive fitting attachment/detaching device according to this invention, FIG. 3 is a partial sectional view taken along the - line in FIG. 1, and FIG. The figure is a partial cross-sectional view taken along the - line in Fig. 1, and Fig. 5 is a partial cross-sectional view taken along the - line in Fig. 1.
FIG. 1: Unprocessed workpiece support station, 2: Drive bracket attachment/detachment station, 3: Processed workpiece support station, 4, 5, 6: A, B, C support base,
7, 8, 9: hollow hole, 10, 11, 12: A,
B, C proximity switch, 13: Drive bracket, 14: Ring body, 15, 16: Support bolt, 17: Rotating pin, 18: Pivot pin, 19: Eccentric cam, 20: Tightening lever, 21: Scissors type Spring, 22: Support piece, 2
3: Positioning bolt, 24: Rotating shaft, 25: Rotating plate, 26: Operating pin, 27: Indexing motor, 28,
29: D, E proximity switch, 30, 31: A, B
Dotsugu.

Claims (1)

[Scope of utility model registration request] A hollow hole is formed through which a workpiece with a drive fitting equipped with a spring-operated tightening lever can be freely moved in and out in the axial direction, and a support piece portion for supporting the drive fitting is formed in the lower part of the hollow hole. A support base is formed, and an eccentric portion is formed below the support base coaxially with the hollow hole, rotationally driven by an indexing motor, and capable of engaging with the tightening lever of the drive fitting. A drive fitting attachment/detachment device consisting of a rotary shaft.