JPH0679368A - Punch guide device of punch press machine - Google Patents

Abstract

PURPOSE:To improve the tool life and to prevent the tool from damaging by controlling a swing of the punch tool. CONSTITUTION:A tool supporting guide 16 closing a punch tool 14 held with a ram lifting-freely is provided on a punch frame. A tool change opening 17 opening to an automatic tool changing device 6 side is provided on the circumferential wall of this tool supporting guide 16, and an opening and closing cover 19 is provided. The automatic tool changing device 6 changes the punch tool 14 between a tool magazine and the ram of a punch driving mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch guide device for a punch press equipped with an automatic tool changing device.

[0002]

2. Description of the Related Art Conventionally, a turret punch press in which a large number of punch tools are held on a turret is generally used so that one punch press machine can perform various punching processes. However, there is a demand for more versatility in punching. To meet such demands, a chain-shaped tool magazine is provided instead of the turret, and an ATC device (automatic tool changer) is used to drive the tool magazine and punch. The one in which the punch tool is exchanged with the ram of the mechanism has been put into practical use.

In this main punch press machine, a clamp device for fixing the exchanged punch tool to the ram in a fixed state is used, and an example thereof is shown in FIG. The clamp device of the same drawing is provided with an inlet / outlet port 51a of a head 52a of a punch tool 52 gripped by a tool exchanging arm 50 on a side surface of a lower end of a tool holder 51 that is driven up and down, and the head 52a is fixed to a fixing member 53 and a give 54. It is sandwiched between and. The give 54 is rotatably attached to the elevating block 55 by a pin 56, and as the elevating block 55 descends, it is guided by a guide block 57 to press the head 52a. The fixing member 53 includes a head 52 of the punch tool 52.
An engaging piece 58 that engages with the outer peripheral groove of a is provided in a biased state by a disc spring 60 via a shaft 59. Punch tool 5
With respect to No. 2, the upward biasing force pushes the upper surface portion against the lower surface 57a of the guide block 57, thereby preventing shake.

[0004]

However, in the structure in which the punch tool 52 is clamped only by sandwiching the head portion 52a and pressing the upper surface portion as described above, it is difficult to sufficiently prevent the punch tool 52 from swinging. Therefore, the punch tool 52
Due to the inclination of the die tool, a slight misalignment with the die tool (not shown) may be caused, which may shorten the tool life or, in an extreme case, damage the punch tool 52 and the die tool.

An object of the present invention is to provide a punch guide device of a punch press machine which can suppress the wobbling of the punch tool and improve the tool life.

[0006]

The punch guide device of the present invention is applied to a punch press machine provided with an automatic tool changing device for changing a punch tool between a tool magazine and a ram of a punch driving mechanism. In this punch press machine,
A frame is provided with a tool support guide that surrounds a punch tool held by a ram so that the punch tool can be moved up and down, and an openable and closable tool change port that opens to the automatic tool changer side is provided on the peripheral wall of the tool support guide.

[0007]

According to this structure, the punch tool is supported by the tool support guide that surrounds the outer periphery thereof and moves up and down. Therefore, stable punching can be performed without tilting the punch tool, and the tool life can be prevented from being shortened and the tool can be prevented from being damaged due to the deviation of the tool core between the punch side and the die side. When exchanging tools, open the tool exchanging port provided on the peripheral wall of the tool support guide for exchanging.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 4 shows a schematic plane of the whole punch press machine. This punch press machine is provided with a punch drive mechanism 2 and a work table device 3 on a frame 1, a tool magazine 4, and an automatic tool for exchanging tools between the tool magazine 4 and a ram 5 of the punch drive mechanism 2. The exchange device 6 is provided. The punch drive mechanism 2 is of a crank type that converts the rotation transmitted from the press motor 12 to the flywheel 13 into the elevation of the ram 5. The work table device 3 has a plate-shaped work (not shown) placed on its upper surface and is moved in the front-rear direction and the left-right direction.

The tool magazine 4 is formed by connecting a large number of tool accommodating tools 7, each of which holds a punching tool, in a chain shape, and hooking them on a sprocket 8 to rotate them.
The automatic tool changing device 6 is provided with tool holding claws 11 at both ends of a changing arm 10 which horizontally rotates around a support shaft 9, and each tool holding claw 11 has an advance / retreat drive mechanism provided in the changing arm 10 (FIG. It is operated forward and backward with (not shown).

Although not shown on the die tool side, the die tool is also provided with a tool magazine 4 and an automatic tool changer 6 similarly to the punch tool side, or the tool magazine 4 and the automatic tool changer. Device 6
The punch tool and the die tool are both accommodated and exchangeable. In FIG. 2, the punch tool 14 is detachably attached to the lower end of the ram 5, and the punch guide device 15 is provided so as to support the punch tool 14. DH indicates die height.

The punch guide device 15 is a tool support guide 1 that surrounds the punch tool 14, as shown in the broken plane in FIG.
6, the tool support guide 16 is composed of a guide main body 18 having a U-shaped cross section having a tool changing port 17 on the side of the automatic tool changing device 6, and an opening / closing cover 19 for opening and closing the tool changing port 17. To be done. The flange portion 18a at the upper end of the guide body 18 is fixed to the upper frame portion 1a of the frame 1 (FIGS. 5 and 2). The opening / closing cover 19 has an inner surface formed in an arcuate cross section along the outer peripheral surface of the punch tool 14, and is opened / closed by a cover opening / closing drive device 20.

The cover opening / closing drive device 20 is shown in FIG.
And the lateral movement indicated by the arrow b, and includes a longitudinal movement base 21, a longitudinal movement cylinder 22 thereof, and a lateral movement cylinder 23. Front and back moving table 2
1 is installed on a mounting plate 24 installed on the frame 1 (FIG. 2) so as to be movable back and forth (direction of arrow a) via a guide cylinder 25 and a guide rod 26.
It is driven back and forth by. As shown in FIG. 2, the opening / closing cover 19 is attached to the tip of a guide rod 28 supported by a front-rear moving table 21 via a guide tube 27, and is moved forward and backward in the lateral direction (direction of arrow b) by the lateral moving cylinder 23. It

As shown in FIG. 3, the punch tool 14 includes a tool tip 14a which serves as a cutting edge and a holder portion 14 which holds the tool tip 14a.
b and. As shown in FIG. 2, the holder portion 14b has a T-shaped head 14 that engages with the locking groove 5a at the lower end of the ram 5.
c and a claw locking groove 14d for engaging the tool gripping claw 11 of the automatic tool changing device 6, and a claw escape groove 29 is formed on the inner surface of the tool support guide 16.

The ram 5 is rotatably connected to an upper ram 34 (FIG. 5) of the punch drive mechanism 2, and a sleeve 31 having a worm wheel 30 is fitted on the outer ram 34 as shown in FIG. . The punch tool 1 together with the ram 5 is moved by the indexing rotation mechanism (not shown) through the sleeve 31.
4 indexing rotations are possible. By this indexing rotation, a non-circular punch hole such as a rectangle can be machined in any direction.

Next, the punch guide device 15 having the above structure
The operation of will be described. When replacing the punch tool 14,
The opening / closing cover 19 stands by at the position A shown by the chain double-dashed line in FIG. 1, and the tool exchange port 17 of the tool support guide 16 is opened. In this state, the tool gripping claw 1 of the automatic tool changing device 6
1, the punch tool 14 is inserted into the tool support guide 16, and the insertion causes the head 14c to move into the locking groove 5 of the ram 5.
engage a.

When the punch tool 14 is completely inserted, the tool gripping claw 11 moves in the withdrawing direction, and when it is completely withdrawn, the closing operation of the opening / closing cover 19 is started. At this time,
The opening / closing cover 19 first moves laterally (in the direction of arrow b) to the front position B of the tool changing port 17 by driving the left / right moving cylinder 23, and then to the closing position C of the tool changing port 17 by driving the front / rear moving cylinder 22. Advance.

As described above, punching is performed by raising and lowering the punch tool 14 with the tool change port 17 being closed and the entire circumference of the punch tool 14 being surrounded by the tool support guide 16. Therefore, the punch tool 14 does not tilt and stable punching can be performed. Therefore, the punch tool 14
The tool life and tool damage due to misalignment of the die tool axis are prevented.

Although the opening / closing cover 19 is configured to be opened laterally in the above embodiment, the fulcrum 31 is provided as shown in FIG.
The opening / closing cylinder 32 may be rotated up and down to open and close.

[0019]

In the punch guide device of the present invention, the frame is provided with the tool support guide that surrounds the punch tool held by the ram so that the punch tool can be moved up and down, and the peripheral wall of the tool support guide is provided with the openable tool exchange port. The punch tool can be supported against the inclination without hindering the tool change by the automatic tool changer. Therefore, stable punching with no runout can be performed, and life shortening and tool damage due to misalignment of the tool cores on the punch side and the die side can be prevented.

[Brief description of drawings]

FIG. 1 is a cutaway plan view of a punch guide device according to an embodiment of the present invention.

FIG. 2 is a cutaway front view thereof.

FIG. 3 is a cutaway side view of the same.

FIG. 4 is a schematic plan view of a punch press machine provided with this punch guide device.

FIG. 5 is a cutaway side view of the punch press machine.

FIG. 6 is a cutaway side view of a punch guide device according to another embodiment.

FIG. 7 is a cutaway side view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Frame, 2 ... Punch drive mechanism, 3 ... Work table device, 4 ... Tool magazine, 5 ... Ram, 6 ... Automatic tool changing device, 7 ... Tool accommodation tool, 10 ... Exchange arm, 11 ... Tool gripping claw, 14 ... punch tool, 14c ... head, 15 ... punch guide device, 16 ... tool support guide, 17 ... tool change port, 18 ... guide body, 19 ... open / close cover, 20 ... cover open / close drive device, 29 ... claw escape groove

Claims (1)

[Claims] 1. A punch press having an automatic tool changer for exchanging a punch tool between a tool magazine and a ram of a punch drive mechanism, wherein a tool support guide that surrounds the punch tool held by the ram so as to move up and down. A punch guide device for a punch press machine, which is provided in a frame, and which has a tool exchange port that opens and closes on the side of the tool support guide and that opens toward the automatic tool changer.