JPH0472622B2 - - Google Patents

Abstract

The invention relates to an upper tool holder (4) for a punch or the like, with at least two punching tools (5) arranged next to one another, preferably each punching tool (5) consisting of a punching ram (7), a ram holder (8) and a coupling nut (9) connecting the punching ram (7) to the ram holder (8), with a carrier body (10), with a receiving plate (11), with tool guides (12) for each punching tool (5) which are arranged next to one another in the receiving plate (11) and which extend in the punching direction, and with an especially pivotable closing cover (14) fastened to the carrier body (10), especially articulated pivotably about an articulation axle (13) and removable in a plane perpendicular to the punching direction, the upper ends of the punching tools (5) being guided in the tool guides (12) so as to be displaceable in the punching direction and so as to be limited in one direction by bearing flanges (15). In this upper tool carrier (4), the guidance of the punching tools (5) is not influenced by the attachment of the closing cover (14) to the carrier body (10), specifically in that the closing cover (14) comprises the receiving plate (11), in that the tool guides (12) are closed annularly in the plane perpendicular to the punching direction, and in that, when the closing cover (14) is removed, especially swung away, from the carrier body (10), the punching tools (5) can be pushed into the tool guides (12) or pulled out of the tool guides (12) in the punching direction or in the direction perpendicular to the receiving plate (11). <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an upper tool support for a punching machine having at least two punching tools arranged in parallel.

In principle, the following description applies not only to the upper tool carrier of a machine tool configured as a punching machine, but also, for example, if two or more pawl tools are arranged side by side on the upper tool carrier. The teachings of the invention are therefore not limited only to punching machines and punching tools, but are applicable to all machine tools where similar problems arise. For ease of understanding, the teachings of the present invention will be described below with reference to an example of an upper tool support for a punching machine.

(Prior Art) In the upper tool support for a known punching machine, etc., which is the premise of the present invention (European Patent Application No. 180146), there is a limited space when a plurality of punching tools are arranged side by side. Considering the condition,
A quick exchange of one or all punching tools is possible as follows. That is, since the support plate is part of the support member and the tool guide is open towards the end face of the support member, the upper end of the punching tool can be inserted substantially horizontally into the tool guide. The closing cap always closes all tool guides at the open end. By applying the closure cap and locking the support plate and closure cap, the open ends of all tool guides in the support plate are closed in one motion. This ensures that all punching tools are held securely. In detail,
The end of the punching tool has a hammerhead-like enlargement, and the bearing plate and the closing cap have support surfaces corresponding to the hammerhead-like enlargement, so that the punching tool cannot fall out of the tool guide downwards. . The closing gear is pivotably connected to the support or bearing member via a pivot shaft and is lockable to the support or bearing member by means of a locking device arranged on the opposite side of the pivot. It is. The locking device consists of a locking pin which is pivotally connected to the carrier plate so as to be able to pivot in a horizontal plane and a locking receptacle which is open on one side and is provided in the closing cap, the locking pin being inserted into the locking receptacle for locking. It is swingable and can be fixedly tightened with a tightening nut. In addition, accommodation spaces are provided in the support member above the tool guide and below the force transmission surface for the upper end of the punching tool, and these accommodation spaces are movable approximately perpendicularly to the punching direction. It can be closed by a force-transmitting slide. Each punching tool is equipped with a push-up lever arranged on the support member, one end of which grips the upper end of the associated punching tool from below on the side.
The upper end of the punching tool can therefore be lifted into the receiving space by means of a lift lever when the force-transmitting slide is retracted. For this purpose, a pneumatic drive device or the like is provided.

The above-mentioned upper tool carrier, which forms the starting point for the teaching of the invention, leaves no room for improvement with regard to the possibility of rapid exchange of the punching tool. However, the half-shell configuration of the bearing plate and closure cap to form the tool guide has proven to be problematic in practice. In other words, if the locking device is tightened too strongly, the punching tool may be clamped in the tool guide. The upper tool carrier is therefore inoperable at this time. The result is sometimes damage to the punching tool and possibly other machine parts.

SUMMARY OF THE INVENTION The object of the present invention is to improve the above-mentioned upper tool support in such a way that even when the closing cap is strongly clamped onto the support member, the clamping force does not reach the punching tool.

(Means for Solving the Problems) The upper tool support according to the present invention that solves the above problems has the following features. That is, in an upper tool support for a punching machine having at least two punching tools arranged in parallel, the upper tool support has a support member and a support plate that is removable from the support member, On the above support plate,
Tool guides for each punching tool extending in the punching direction are provided in parallel, said tool guides being closed in a ring shape in a plane perpendicular to the punching direction, and said supporting plate being The punching tool is pivotably connected to the support member by a pivot shaft, and can be removed from the support member by swinging in a plane perpendicular to the punching direction, such that the upper end of the punching tool is located within the tool guide. The support member is movably guided in the punching direction, with this guidance being limited in one direction by a support flange, the support member having a punching section between the upper part of the tool guide and the lower part of the force transmission surface. A receiving space is provided for the upper end of the tool, said receiving space being filled by a movable force-transmitting slide moved forward and empty when the force-transmitting slide is moved back. Become,
Each punching tool is assigned a push-up lever arranged on the support member, and the push-up lever supports the upper end of the assigned punching tool from the side, and the support plate body is placed on the side facing the support member. Each tool guide has a push-up lever engagement passage open in the tool guide below the support flange, so that when the force transmitting slide is retracted;
The upper end of the punching tool is lifted into the storage space by a push-up lever (operation) According to the invention, the tool guides each have a half-shell shape, part of which is a closing cap, and part of which is a support plate. No provision shall be made for this purpose. Rather, according to the invention, the tool guide is provided entirely on the carrier plate. The support plate is also designed as a closing cap, so that it can be completely removed from the support member. When the bearing plate is removed from the support member, in particular when it is swiveled open, the punching tool can be quickly inserted into the tool guide in the punching direction or in a direction perpendicular to the bearing plate, or from there. It can be withdrawn, similar to what was previously possible by withdrawing and inserting from a half-shell receptacle. However, since the tool guide is completely closed in a ring shape, when the support plate is tightened and fixed to the support member by the locking device, the cross section of the tool guide changes depending on the tightening force. No tightening of the punching tool occurs.

(Example) Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a machine tool in the form of a punching machine to which the invention is applied, which machine tool has a C-shaped machine body 1, shown only schematically, and a lower tool 3. It has a lower tool carrier 2 formed or arranged on the machine body 1, and an upper tool support 4 with an upper tool, here a punching tool 5, arranged or formed on the machine body 1. Although shown only schematically, on the upper tool carrier 4 or on the machine body 1 above the upper tool carrier 4 there is a drive head 6, for example in the form of a hydraulic cylinder-piston arrangement, by means of which the drive head 6 can be operated. Therein, the punching tool 5 can be lowered towards the lower tool 3.

As shown in connection with FIGS. 1 and 2, the upper tool support 4 shown here comprises at least two
To be precise, the advantage here lies in the provision of three punching tools 5 arranged side by side. In the embodiment shown here, each punching tool 5 includes a punch 7, a punch holder 8 and a cap nut 9 connecting the punch 7 to the punch holder 8.
Consisting of The three punching tools 5 are arranged side by side as close as possible as shown in FIG.

As shown in FIGS. 1 and 2, in the embodiment shown here, the upper tool support 4 has a support member 10 and a support plate 11. In the embodiment shown in FIGS. As can be seen from FIG. 3, a tool guide 12 for each punching tool 5 is provided which is arranged side by side on the support plate 11 and extends in the punching direction. 1, 2 and 3 further relate that:
The support plate 11 is pivotally connected to the support member 10 so as to be swingable about a pivot axis 13. Finally, as shown in connection with FIGS. 1 and 2, the upper end of the punching tool 5 is limited in one direction by a support flange 15 in the tool guide 12 in the punching direction, thus here vertically. It is guided so that it can swing in the direction. The support flange 15 is best shown in FIG. These support flanges are used to prevent the punching tool 5 from dropping downward from the tool guide 12.

Although not shown in the figures, the upper end of the punching tool 5 has a hammerhead-like enlargement which rests on a support flange 15 provided in the tool guide 12 so that it can be pushed downwardly. The punching tool 5 is prevented from falling off.

In addition, FIG. 4 referred to in the following explanation is
The support plate 11 in FIG. 3 is shown closed with respect to the support member 10, with the parts above the support member 10 removed, and the support plate 11 that should be visible in each accommodation space 17 is shown. 11 tool guide 1
2 is omitted from illustration. FIG. 4, along with FIG. 3, shows a state in which the punching tool 5 is not inserted, and when inserted, the upper end of the punching tool 5 can be seen at the position of the accommodation space 17 in FIG.

As shown in FIGS. 4 to 7, in the upper tool support 4, the support member 10 is provided with an accommodation space 17 between the tool guide 12 and the force transmission surface 16 for the upper end of the punching tool 5. . The accommodation space 17 is
The force transmitting slide 1 can be closed by a force transmitting slide 18 which is movable approximately perpendicularly to the punching direction.
8 can be driven by an adjusting drive 19 which is constructed as a pneumatic cylinder-piston unit. The force transmission surface 16 is arranged below the drive head 6. According to this technology, the force transmission surface 1
6, only the punching tool 5 whose force-transmitting slide body 18 blocks its associated storage space 17 actively performs the punching operation, but the storage space 17 is not blocked. The upper ends of the punching tools 5 are retracted into the respective receiving space 17 and do not take part in the punching operation.

In order to actively insert the inactive punching tool 5 into the receiving space 17 instead of placing it against the upper side of the workpiece and returning it into the receiving space 17, a supporting member 10 is attached to each punching tool 5. It is known to provide a push-up lever 20 attached to the. As shown in FIGS. 5 to 7, the push-up lever 20 can grip the side of the upper end of the attached punching tool 5 from below, and when the force transmitting slide body 18 is retreated, the punching tool 5 The upper end of can be lifted into the accommodation space 17.

As shown in FIG.
is actuated by this sliding body 18 to push up the punching tool 5 and draw its upper end into the accommodation space 17.

In FIG. 6, the force transmitting slide 18 is beginning to be slid forward by the drive device 19. At this time, the lever operating surface 23 of the arm portion 22 of the push-up lever 20
is separated from the force transmitting sliding body 18, and the force transmitting sliding body 18
The end surface 26 on the housing space 17 side has begun to come into contact with the depressing surface 27 on the protrusion 28 of the lever 20 .

In the position shown in Figure 7, push up lever 2
0, the punching tool 5 is lowered to the lowest position.
The force transmitting slide body 18 that has been slid forward closes the accommodation space 17.

The present invention is best seen in FIG. 3 and has the following features. That is, the support plate 11 is also designed as a closed cap, the tool guide 12 is ring-shaped in a plane perpendicular to the punching direction, and the punching tool 5 can be removed from the support plate 10. 11 can be inserted into or withdrawn from the tool guide 12 in the punching direction and in a direction perpendicular to the support plate 11 when removed, in particular when swung. The advantages of this construction with a ring-shaped closed tool guide 12 in the bearing plate 11 have already been explained in detail at the outset.

Furthermore, as shown in FIG.
The tool guide 12 has, on the side facing the support member 10, a mating passage 21 for a lift lever 20 which opens into the tool guide 12 under the support flange 15.
has. With this, when the support plate body 11 is attached to the support member 10, the push-up lever 20 passes through the engagement passage 21 and is placed under the green of the punching tool 5.
In particular, it can engage a hammer-like enlargement at the upper end. This insertion of the lift lever 20 takes place automatically during the pivoting of the support plate 11 towards the support element 10 if the support plate 11 is pivotally connected to the support element 10 . In order to perform this insertion smoothly, it is desirable that the side surface of the engaging passage 21 facing the pivot shaft 13 widens toward the support member insert 10. This expansion is done on pivot axis 1.
This corresponds to an arcuate movement of the interlocking passage 21 around 3.

As shown in FIGS. 2, 3 and 4, in the embodiment shown here, a pivot shaft 13 is provided for pivotally connecting the support plate 11 to the support member 10.
The center of the tool guide 12 should be placed at a considerable distance from the green immediately next to it, approximately 100mm if possible.
~200mm, especially laterally spaced approximately 150mm apart. This lateral extension structure of the support member 10 and the support plate 11 provides the advantage that the upper end of the punching tool 5 can be easily pulled upward from the tool guide 12 within the support plate 11.

As shown in FIG.
In particular, the pivot shaft 13 is
It can be locked to the support member 10 by means of a locking device 22 arranged on the opposite side. 2 and 4, in accordance with the advantageous teachings of the present invention, a second locking device 23 is provided near the pivot axis 13 and According to the teaching, it is arranged under the part 24 of the bearing plate 11 which extends towards the pivot axis 13. The locking device 23 can then be constructed in the same way as the locking device 22 as described at the outset, ie it has a locking pin 25 pivotably connected in a horizontal plane on the support member 10 and a locking pin 25 mounted on the support plate 11. On one side, it comprises a locking pin receptacle 26 which is preferably laterally open, in which case the locking pin 25 can be swung into the locking pin receptacle 26 for locking purposes and can be tightened by means of a tightening nut 27 or the like. In this case, the tightening nut 27 etc. can in particular be designed as a bent tightening lever, as is clearly shown in FIG. If the second locking device 23 is arranged below the part 24 of the support plate 11, after the locking pin 25 together with the tightening nut 27 has been swung to the left in FIG. can move without colliding with the locking device 23.

[Brief explanation of the drawing]

1 is a schematic side view of a machine tool, here a punching machine; FIG. 2 is a front view of the punching machine of FIG. 1;
FIG. 3 is a plan view of the punching machine shown in FIG.
The drawing, Figure 4, shows the support plate body in an open state.
FIG. 2 is a plan view of the punching machine with the drive head removed, FIG. 5 is a sectional view taken along the line V-V in FIG. 4, and FIG. 6 is a state in which the operation of the punching tool is being controlled FIG. 7 is a sectional view similar to FIG. 5, showing the punching tool pushed down to its lowest position. 1...Machine body, 2...Lower tool support, 3...
... lower tool, 4 ... upper tool support, 5 ... punching tool, 6 ... drive head, 7 ... punch punch, 8 ... punch holder, 9 ... cap nut, 10 ... support member, 11 ...Support plate body, 12
...Tool guide, 13...Pivot axis, 15...
Support flange, 16...force transmission surface, 17...accommodation space, 18...force transmission sliding body, 20...push-up lever, 21...mating passage, 23...locking device.

Claims (1)

[Claims] 1. An upper tool support 4 for a punching machine having at least two punching tools 5 arranged in parallel, including: (a) the upper tool support 4 is removable from a support member 10; (b) Tool guides 12 for each punching tool 5 extending in the punching direction are provided in parallel on the support plate 11; (c) The tool guide 12 is closed in a ring shape in a plane perpendicular to the punching direction, and (d) the support plate 11 is pivotably connected to the support member 10 by a pivot shaft 13. , and can be removed from the support member 10 by further swinging in a plane perpendicular to the punching direction; (b) the upper end of the punching tool 5 is attached to the tool guide 12;
(f) said support member 10 has an upper part of the tool guide 12 and a force transmission surface; The punching tool 5 is inserted between the lower part of the
A receiving space 17 is provided for the upper end, and (g) said receiving space 17 is closed by a movable force transmitting slide 18 which is moved forward and which is moved back. (h) Each punching tool 5 is assigned a push-up lever 20 disposed on the support member 10; (i) The push-up lever 20 is used to push up the punching tool 5 to which it is assigned.
(j) the support plate 11 has, on the side facing the support member 10, for each tool guide 12 a pusher opening into the tool guide 12 below the support flange 15; (k) The upper end of the punching tool 5 is lifted into the accommodation space 17 by the push-up lever 20 when the force transmission slider 18 is retracted. Features an upper tool support for punching machines. 2. The upper tool support according to claim 1, wherein the side surface of the pivot shaft 13 of the engagement passage 21 in the support plate body 11 widens from the tool guide 12 toward the support member 10. 3. The center of the pivot axis 13 for pivotally connecting the support plate 11 to the support member 10 is arranged at a lateral distance from the adjacent edge of the adjacent tool guide 12. Or the upper tool support according to item 2.