JPH0314585B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an automatic attachment exchange device for automatically attaching and detaching attachments to and from a spindle head of a machine tool.

[Technical background of the invention and its problems]

BACKGROUND ART In large machine tools, such as boring machines and machining centers, attachments such as angle heads and face plates are sometimes attached to the end face of the spindle head of the machine tool to perform machining.

Conventionally, attachments were attached and detached manually by an operator using a crane or a frame. However, this manual attachment replacement work is difficult due to the fact that the attachment is relatively heavy and requires adjustment work such as aligning the attachment part and adjusting the angular position.
It is a difficult and time-consuming task. For this reason, an automatic attachment exchange device has been developed that uses a nut runner to rotationally tighten and remove bolts for fixing attachments (Japanese Patent Application Laid-Open No. 1983-201144), but this device is large and has a complicated structure. There is a problem. In addition, the attachment magazine in which multiple attachments are stored is moved to a position in front of the front end of the spindle head, and the attachments are clamped by the attachment clamp mechanism provided at the front end of the spindle head, allowing automatic attachment replacement. Although a device has been developed to do this (Toshiba Machine Technical Report/
Vol. 2/No. 2 (October 1984, pages 8 to 13), in this device, the entire attachment magazine moves, so the drive mechanism for this is larger and the structure is The problem is that it becomes more complicated.

Conventional automatic attachment changers have been large and complex in structure, so when used as an accessory to a machine tool, the layout of the machine tool becomes difficult and the control system becomes complicated. It was hot.

[Purpose of the invention]

The present invention has been made with these points in mind, and it is an object of the present invention to provide an automatic attachment exchange device that is simple in structure and small in size.

[Summary of the invention]

The present invention is an automatic attachment exchange device that automatically attaches and detaches attachments to and from the spindle head of an automatic attachment exchange device. a movable base on which an attachment is mounted movably on the guide rail; and an engagement member supported on the movable base so as to be movable forward and backward toward a table of a machine tool; A guide rail drive mechanism that moves the guide rail forward and backward, an engagement member drive mechanism that moves the engagement member forward and backward, and an engagement provided on a table of a machine tool that is installed to be reciprocally movable parallel to the guide rail. It is characterized by having a matching hole.

According to the present invention, the attachment is conveyed by moving the moving table on a guide rail that moves forward and backward, and the moving operation of the moving table is performed using the reciprocating movement of the table of the machine tool, so it is relatively small. A device with a large and simple structure that can transport relatively heavy attachments, and
The automatic attachment exchange device can be installed in a narrow space.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3.

In the figure, reference numeral 11 denotes a column of a machine tool (in this embodiment, a horizontal boring machine), and this column 11 is capable of reciprocating horizontally on a bed 12 fixed on the floor. A spindle head 14 that rotatably holds the spindle 13 is mounted on the column 11 so as to be movable up and down.

A table base 15 that reciprocates on a bed 17 fixed on the floor in a direction perpendicular to the direction of movement of the column 11 is disposed in front of the spindle head 14. A processing table 16 is mounted on which a workpiece or a pallet for placing a workpiece is placed.

Column 11 adjacent to this processing table 16
An attachment magazine 20 containing a plurality of attachments is disposed on either the left or right side of the attachment magazine 20 .

The attachment magazine 20 has a bed 21 fixed on the floor, and a moving table 22 on which a plurality of attachments are placed is disposed on the bed 21. The movable table 22 is arranged such that its bottom surface 22a is in slidable contact with the support portion 21a provided on the upper surface of the bed 21, and is arranged between the upper surface of the bed 21 and the movable table 22. The guide rail 23 is disposed in movable contact with the upper surface of the guide rail 23. The guide rail 23 is
It is fed out from above the bed 21 to the machine tool side, has a length sufficient to horizontally cross the center line of the main shaft 13, and is moved by a plurality of rotating rollers 24 provided on the upper surface of the bed 21. Supported for reciprocating movement. Further, the movable table 22 has a bottom surface 22
It is placed on a guide rail 23 via a rotating roller 25 provided at a.

A chain 26 is attached to the lower surface of the guide rail 23, and a hydraulic motor 27 is attached to the chain 26.
A sprocket 28, which is rotationally driven by the sprocket 28, is in meshing engagement with the sprocket 28.

On the upper surface of the movable table 22, a region on which an attachment is placed is formed by a partition plate 22b or the like. In this embodiment, an example is shown in which a face plate A1 and an angle head A2 are placed on the movable table 22 as attachments. Mobile platform 22
A locating pin 29 is further held on the upper surface of the locating pin 29 so that its tip 29a can move forward and backward toward the processing table 16. Reference numerals 31a and 31b are support members that slidably support the locate pin 29, and these support members 31a and 31b are fixedly installed on the movable table 22. Support member 3 on one side
An actuator for driving the locate pin 29, for example, a hydraulic cylinder 32, is attached to 1a,
By connecting the piston rod 32a of the hydraulic cylinder 32 to the locate pin 29, the locate pin 29 can be moved forward and backward.

A locating hole 33 into which the locating pin 29 is inserted and engaged is bored in the side end surface 16a of the processing table 16 at a position facing the tip 29a of the locating pin 29. This locate hole 33
may be provided by directly drilling a hole in the side end surface 16a of the processing table 16, or may be formed by fixing a donut-shaped ring.

At a side position of the bed 12 opposite to the side where the attachment magazine 20 is disposed (the right side position of the bed 12 in FIGS. 1 and 2), the tip of the guide rail 23 that has been extended is located. A rail pedestal 34 is provided to be mounted and engaged.

Next, the operation of this embodiment having such a configuration will be explained.

Figures 1 and 2 show attachment A1,
The moving table 22 of the attachment magazine 20 on which A2 is placed is shown in its standby position. When an attachment replacement command is issued, first the hydraulic cylinder 32 operates and locates the pin 29.
is moved forward toward the processing table 16, and the tip 29a of the locating pin 29 is inserted into and engaged with the locating hole 33 provided in the side end surface 16a of the processing table 16. Next, the hydraulic motor 27 operates,
By rotating the sprocket 28, the chain 26 that meshes with it is moved linearly.
Due to the linear movement of the chain 26, the guide rail 2
3 moves in the direction of the front position of the main shaft 13 and stops when its tip end is placed on and engaged with the rail holder 34. This movement of the guide rail 23 is performed smoothly by moving on a plurality of rollers 24 provided on the bed 21 of the attachment magazine 20.
9 is inserted into and engaged with the locating hole 33 of the processing table 16, so that it remains stopped at the standby position and does not move together with the guide rail 23.

In this way, the guide rail 23 is fed out and moved, and both ends of the guide rail 23 are supported between the bed 21 and the rail pedestal 34, thereby forming a bridging path along which the movable table 22 moves.

Next, the table base 15 is moved on the bed 17, and the processing table 16 is moved in the direction of the front position of the main shaft 13 (to the right in FIG. 1). By this movement of the processing table 16, the moving table 22 connected by the locate pin 29 moves on the guide rail 23 in parallel with the table base 15 and stops at a predetermined position corresponding to the attachment to be selected.
In this case, the attachment is positioned such that its mounting surface faces the mounting surface of the spindle head 14.

Subsequently, the column 11 moves forward on the bed 12 toward the processing table 16, bringing the mounting surface of the spindle head 14 into contact with the mounting surface of the attachment. Spindle head 1
4 and the mounting surface of the attachment, for example, an attachment automatic attachment/detachment device (Japanese Patent Application No. 156584/1984) consisting of a collet and a clamp rod.
is provided, and the attachment is automatically mounted on the spindle head 14 by this automatic attachment/removal device. When the attachment is attached to the spindle head 14, the spindle head 14 rises once to separate the attachment from the moving table 22, and then moves the spindle head 14 backward together with the column 11 to remove the required attachment from the moving table 22. Finish the receiving operation.

The table base 15 moves again in the direction of the attachment magazine 20 (to the left in FIG.
Move it onto the 0 bed 21. Subsequently, the hydraulic motor 27 is operated, and the guide rail 23 is moved forward and backward onto the bed 21 by rotationally driving the sprocket 28. When the guide rail 23 is completely moved forward and backward onto the bed 21, the hydraulic cylinder 32 is operated to move the locate pin 29 backward and pull out its side end 29a from the locate hole 33.

With the above steps, the series of operations for transporting and mounting the attachment is completed. These operations can be performed completely automatically using known sequence control techniques.

Further, the operation of returning the attachment mounted on the spindle head 14 to the attachment magazine 20 can also be performed by a series of operations similar to those described above.

According to this embodiment, the moving table 22 on which a plurality of attachments are placed is moved from the attachment magazine 20 side to a position in front of the spindle head 14 to perform the attachment/detachment operation of the attachments. Therefore, the drive mechanism is simpler and smaller than the conventional one that moves the attachment magazine 20 itself. Further, when moving the moving platform 22, the guide rail 23 is bridged in advance and the moving platform 22 is run on the guide rail 23, so that even relatively heavy attachments can be easily transported. Furthermore, since the moving table 22 can be moved by using the movement of the processing table 16, a special attachment conveying device is not required, and the apparatus can be downsized.

In the explanation of this embodiment, an example in which the present invention is applied to a horizontal boring machine is shown, but the present invention can also be applied to a vertical boring machine whose main axis is directed vertically downward, a machining center, etc. can. In this case, the mounting surface of the attachment placed on the moving table 22 may be directed upward.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to obtain an automatic attachment exchange device that is small in size and has a simple structure. Since the automatic attachment exchange device according to the present invention does not require a large installation space, the layout of the machine tool can be relatively easily done, and the floor space of the entire factory can be used effectively.

[Brief explanation of the drawing]

1 to 3 are diagrams showing one embodiment of an automatic attachment exchange device according to the present invention, and FIG.
The figure is a plan view thereof, FIG. 2 is a front view taken along the line in FIG. 1, and FIG. 3 is a sectional view taken along the line in FIG. 11... Column, 13... Spindle, 14... Spindle head, 15... Table base, 16... Processing table, 20... Attachment magazine, 21...
...Bed, 22...Moving table, 23...Guide rail, 26...Chain, 27...Hydraulic motor, 2
9... Locate pin, 32... Hydraulic cylinder, 3
3... Locate hole, 34... Rail cradle, A1,
A2...Attachment.

Claims (1)

[Claims] 1. A bed installed on a floor surface, a guide rail disposed on the bed so as to be movable back and forth, and an attachment movably mounted on the guide rail. a movable base, an engaging member supported on the movable base so as to be movable forward and backward toward the table of the machine tool, a guide rail drive mechanism that moves the guide rail forward and backward, and an engagement member that moves the engaging member forward and backward. An automatic attachment exchange device comprising: a mating member drive mechanism; and an engaging hole provided in a table of a machine tool installed to be able to reciprocate in parallel with the guide rail. 2. The guide rail drive mechanism includes a chain attached to the guide rail, a sprocket that meshes with the chain, and a motor that rotationally drives the sprocket. Attachment automatic exchange device.