JPH0358811B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a drilling machine for punching single holes of various hole diameters into a sheet metal workpiece.

<Prior Art> Depending on the type of workpiece to be drilled, it may be necessary to drill a single hole with different hole diameters. In such a case, Japanese Patent Application Laid-Open No. 53-66859 provides a drilling device that allows single holes of different diameters to be punched using a single processing machine.

This tool consists of a mold holder that supports a plurality of mold units incorporating punches and dies in parallel in the X-axis direction and slidable in the Y-axis direction, and a mold holder that supports the mold units in the X-axis direction. In this configuration, an arbitrary mold unit is indexed to a fixed processing position by moving the mold unit, and a hole is drilled in the plate material that is fed to the processing position.

<Problems to be Solved by the Invention> The above-mentioned conventional hole-drilling device is configured to index and position all of the mold units arranged in parallel with respect to a fixed processing position by shifting them all using an actuator. Therefore, a considerable amount of weight must be shifted, and due to inertia, the mold unit overruns the processing position, making it difficult to correctly position the desired mold unit at a fixed position in the processing position.

Further, the plurality of mold units supported by the mold holder so as to be slidable in the Y-axis direction are supported in a completely free state in the forward direction, although there is a stopper that determines the retreating end. Therefore, when the mold carrier is shifted or when the punch is operated to perform hole drilling, the mold unit that should be located at the retreating end moves forward and protrudes due to vibrations, etc. when the mold carrier is shifted or when the punch is operated to perform hole drilling, causing the mold unit positioning device to move forward and protrude. There is a problem of damage caused by collision with other structures such as.

<Means for Solving the Problems> The present invention provides a multi-diameter drilling machine that solves the above-mentioned conventional problems, and its characteristic configuration is that a die and a lifting cylinder are mounted on a base. Therefore, a plurality of drilling devices each having a yoke equipped with a punch that moves up and down in the Y-axis direction with respect to the die are arranged in parallel in the X-axis direction and are each movable forward and backward in the Z-axis direction. A jig table with a workpiece set on a front base is provided so as to be movable forward and backward in the X-axis direction perpendicular to the forward and backward movement direction of the drilling device, and is engaged with the front part of each of the drilling devices. member, the jig table has an engaging member that can be engaged with and detached from the engaged member, and the die and punch of the hole-drilling device are positioned at a drilling position of the workpiece on the jig table. A cylinder device for advancing and retracting the drilling device to be removed is provided, and the jig table is moved in the X-axis direction to engage the engaging member of the cylinder device for advancing and retreating the drilling device with the engaged member of the required drilling device. a feed screw shaft of a jig stand to rotate the feed screw shaft, a feed motor that rotates the feed screw shaft in forward and reverse directions, a connecting bar having an arc-shaped notch protruding from the rear of each of the drilling devices, and the connecting bar on the outer peripheral surface. Recessed grooves through which the bars pass are provided at the same spacing as the parallel spacing of the connecting bars of the drilling device, and the stopper shaft, on which the notched recess of the connecting bar is engaged, is connected to the outer peripheral surface of the drilling device other than the groove. A stopper device for locking the retreating end position of the drilling device is provided on the base at the rear of the jig table and is arranged to be movable only in the X-axis direction in synchronization with the feed screw shaft of the jig table.

<Function> With the above configuration, the connecting bar is locked to the stopper shaft at the retreating end of all the drilling devices to regulate the retreating end position and restrict forward movement.

When the jig table moves to correspond with the required drilling device, the stopper shaft moves in synchronization with this, and one of the grooves provided in the stopper shaft connects with the connecting bar of the required drilling device. At the same time, the engaging member of the cylinder device for advancing and retracting the drilling device engages with the engaged member of the required drilling device.

In this state, by operating the cylinder device for advancing and retracting the drilling device to move the required drilling device forward toward the jig table, the connecting bar passes through the concave groove of the stopper shaft and moves the required drilling device forward. Operation is allowed and the other drilling device is still held in the retracted position in which the connecting bar is locked to the stopper shaft.

<Examples> Examples of the present invention will be described below based on the drawings. In FIGS. 1 and 2, 1 is a base. On this base 1, a large number of guide rails 8 in the Z-axis direction are provided in parallel in the X-axis direction, and in front of the guide rails 8 in the Z-axis direction, a guide rail 9 in the X-axis direction is provided. It is being

2 is a drilling device. This drilling device 2 is
A die 4 fixed to the yoke 3 and a punch 5 corresponding to the die 4 are provided via a ram to a guide member 7 fixed to the yoke 3 so as to be movable up and down in the Y-axis direction. The ram is connected to a lifting cylinder 6 provided therein.

A support stand 3 is attached to the guide rail 8 in the Z-axis direction.
0 is slidably guided, and the drilling device 2 is installed on this support stand 30. Therefore, on the base 1, as shown in FIG. It is provided so that it can move forward and backward in the Z-axis direction via.

A jig stand 1 is mounted on the guide rail 9 in the X-axis direction.
0 is guided so that it can move forward and backward. Therefore, this jig stand 10 moves forward and backward in front of the drilling device 2 in a direction perpendicular to the direction in which the drilling device 2 moves forward and backward. A jig 40 is mounted on this jig stand 10, as shown by the line in FIG.
A workpiece W made of sheet metal is positioned and set.

The jig table 10 is controlled to be fed and moved by a feed screw shaft 11 which is rotated in forward and reverse directions by a feed motor 12 so as to correspond to each drilling device 2 at a predetermined position.

A hook-shaped engaged member 15 is provided at the front of the support stand 30 supporting each of the drilling devices 2, and on the jig stand 10, the engaged member 15 is provided at the end of the piston rod 13. A cylinder device 27 for advancing and retracting the drilling device, which is provided with a key-shaped engagement member 14 that can be engaged with and detached from the mating member 15, is arranged in the Z-axis direction.

In addition, an arc-shaped notch 26 is provided at the rear of the support stand 30 that supports each of the drilling devices 2.
Connecting bars 25 having a lower surface formed with the connecting bars 25 are provided in a protruding manner and are arranged in parallel at regular intervals in the X-axis direction.

Furthermore, on the base 1 behind the drilling device 2,
A stopper shaft 21 on the outer circumferential surface of which the connecting bar 25 engages and disengages is disposed so as to be movable only in the X-axis direction in synchronization with the feed screw shaft 11.
The engaging member 14 of the cylinder device 27 for advancing and retracting the drilling device on 0 is the engaged member 15 of the required drilling device 2.
A stopper device for locking the backward end position of the drilling device is provided, which regulates the backward end position of the drilling device 2 and restricts forward movement so as to unlock only the drilling device 2 that is engaged with the drilling device 2. The specific configuration of this will be explained with reference to FIGS. 3 to 5.

The stopper shaft 21 is installed on the base 1 behind the drilling device 2 with its axis oriented in the X-axis direction. This stopper shaft 21 has an outer periphery at one end with both sides chamfered, and a detent member 22 is placed in contact with the chamfered surfaces on both sides so as to be movable only in the X-axis direction.

Concave grooves 24 through which the connecting bars 25 pass are provided on the outer peripheral surface of the stopper shaft 21 at the same spacing as the parallel spacing of the connecting bars 25 of each drilling device 2.

16 passes through the axis of the stopper shaft 21 and connects to the base 1.
It is a rotating shaft that supports a stopper shaft 21 on the top, and a feed screw shaft 20 is provided at one end of this rotating shaft 16, and a nut 23 that screws with this feed screw 20 is fixed to the end of the stopper shaft 21. .

Further, a sprocket 18 is attached to one end of the rotating shaft 16.
A chain 19 is stretched between the sprocket 17 attached to the end of the feed screw shaft 11 of the jig table 10, and rotates the rotary shaft 16 in synchronization with the rotation of the feed screw shaft 11, thereby rotating the feed screw 20 and the nut. 23, the stopper shaft 21 is moved axially to index the groove 24 to a position corresponding to the connecting bar 25 of the required drilling cylinder 2.

Next, the operation of the present invention will be explained. Normally, the jig stand 10 is located at one end of the base 1, and all the drilling devices 2 are located at the backward end and are restrained from moving forward. That is, at the moving position of the jig stand 10 in which the engaging member 14 of the cylinder device 27 for advancing and retracting the drilling device is not engaged with any of the engaged members 15 on the side of each drilling device 2, the stopper shaft The concave groove 24 of 21 is axially moved to a position out of phase with respect to the position of all the connecting bars 25, and the notch recess 26 of the connecting bar 25 is kept locked to the stopper shaft 21. are doing.

For example, when drilling with the No. 1 drilling device 2, the engaging member 14 of the cylinder device 27 for advancing and retracting the drilling device is connected to the engaged member 15 of the No. 1 drilling device 2, as shown in the figure. The jig stand 10 is indexed and positioned in the X-axis direction by the feed screw shaft 11 at a position where it engages with the jig table 10. Through this operation, the feed screw shaft 20 on the stopper shaft 21 side rotates due to the rotation of the feed screw shaft 11, and the stopper shaft 21 is shifted by the required amount in the X-axis direction, so that the No. 1 groove 24 is moved to the No. 1 groove 24. It is indexed to the position of the connecting bar 25 of the drilling device 2 of No. 1 and is in a position to allow the connecting bar 25 to pass. However, the grooves 24 of No. 2 to 4 corresponding to the connecting bars 25 of other drilling devices 2
still exists at a position out of phase with respect to the position of each connecting bar 25, and the drilling devices 2 of Nos. 2 to 4
remains locked at the rear end position.

In this state, the cylinder device 27 for advancing and retracting the drilling device
By operating the piston rod 13 to the left in FIG. It is positioned at the drilling position and drilling is performed.

After completion of this drilling, the No. 1 drilling device 2 is returned to the backward end by the operation of the cylinder device 27 for advancing and retracting the drilling device, thereby completing one drilling cycle.

After completion of the drilling cycle by the No. 1 drilling device 2, the next workpiece W is to be drilled by the No. 3 drilling device 2 having a different hole diameter, for example, and the command signal Based on this, the jig table 10 is moved by the feed motor 12 and the feed screw shaft 11, and the engaging member 1 of the cylinder device 27 for advancing and retreating the drilling device
4 is indexed and moved to a position where it engages the engaged member 15 of the No. 3 drilling device 2. Based on this, the stopper shaft 21 is also shifted in the X-axis direction by the required amount.
The groove 24 of No. 3 is indexed to the position of the connecting bar 25 of the No. 3 drilling device 2, and the No. 3 drilling device 2
The lock at the rearward end position of the chisel is released, and the die 4 and punch 5 of the No. 3 drilling device 2 similar to those described above are positioned at the processing position and drilling is performed. In this manner, the hole drilling devices 2 No. 2 and No. 4 perform the hole drilling process in the same manner.

<Effects of the Invention> As described above, in the present invention, the configuration of the stopper device for locking the backward end position of the drilling device which regulates the backward end position of all the drilling devices and restrains the forward movement allows the device to be used for drilling. Only the drilling equipment used for drilling can be unlocked to position the workpiece at the drilling position, and all drilling equipment that is not used for drilling is locked at the retreat end position, so it is possible to position the workpiece at the drilling position. This prevents the inconvenience of the drilling device located at the retreating end moving forward due to such vibrations and colliding with the workpiece on the jig table, thereby deforming and damaging the workpiece.

In addition, the stopper shaft of the stopper device for locking the retreating end position of the drilling device is a jig that engages the engaging member of the cylinder device for advancing and retracting the drilling device on the jig table with the engaged member of the required drilling device. The rotation of the feed screw shaft used for indexing movement of the table is transmitted and the shaft is moved in synchronization, and the engaging member of the cylinder device for advancing and retracting the drilling device engages with the engaged member to lock the drilling device. Since the hole-drilling device is released, it is possible to reliably draw out the drilling device as required, and there is no need for a dedicated feed motor for indexing the movement of the stopper shaft, resulting in cost reduction.

Furthermore, since the jig table side is indexed and moved relative to the drilling device, compared to the conventional method in which all mold units are shifted and one of them is indexed to the machining position, the required The indexing of the jig stand with respect to the drilling device has the effect of being able to be indexed to a fixed position without overrunning due to inertia.

[Brief explanation of drawings]

FIG. 1 is a side view of a multi-diameter drilling machine according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a partially sectional plan view of a stopper device for locking the retreating end position of the drilling device.
4 is a sectional view taken along the line of FIG. 3, and FIG. 5 is a sectional view taken along the line of FIG. 3. 1...Base, 2...Drilling device, 3...Yoke, 4...
Die, 5... Punch, 6... Lifting cylinder, 10...
Jig stand, 11...Feed screw shaft, 12...Feed motor,
14... Engaging member, 15... Engaged member, 16... Rotating shaft, 17, 18... Sprocket, 19... Chain, 20... Feed screw, 21... Stopper shaft, 22...
Anti-rotation member, 23... Nut, 24... Concave groove, 25
... Connection bar, 26 ... Notch recess, 27 ... Cylinder device for advancing and retracting the drilling device.

Claims (1)

[Claims] 1. A plurality of punching devices each having a die and a punch on a yoke that moves up and down in the Y-axis direction with respect to the die by an elevating cylinder are arranged in parallel in the X-axis direction on a base, and each punch is moved up and down in the Z-axis direction. A jig table is provided so as to be movable forward and backward, and a jig table with a workpiece set on a base in front of the drilling device is provided so as to be movable forward and backward in the X-axis direction perpendicular to the forward and backward movement direction of the drilling device, and The front part of the drilling device is provided with an engaged member, and the jig stand has an engaging member that can be engaged with and detached from the engaged member, and the die and punch of the drilling device are mounted on the jig stand. A cylinder device for advancing and retracting the drilling device is provided to position the drilling device at the drilling position of the upper workpiece, and the jig table is moved in the X-axis direction to move the engaging member of the cylinder device for advancing and retreating the drilling device to the required position. A feed screw shaft of a jig stand that engages with the engaged member of the drilling device, a feed motor that rotates the feed screw shaft in forward and reverse directions, and an arc-shaped notch protruding from the rear of each of the drilling devices. a connecting bar having a groove, and grooves on the outer peripheral surface of the connecting bar that allow the connecting bar to pass through are provided at the same spacing as the parallel spacing of the connecting bars of the drilling device, and a cutout recess of the connecting bar is formed on the outer peripheral surface other than the groove. For locking the rearward end position of the drilling device, a stopper shaft to be locked is arranged on a base at the rear of the drilling device so as to be movable only in the X-axis direction in synchronization with the feed screw shaft of the jig stand. A multi-diameter drilling machine equipped with a stopper device.