JPH04319028A - Structure for mounting tool of turret punch press - Google Patents

Abstract

PURPOSE:To easily and surely perform die change of a punch and a die from the same direction even in a working time, also, and further to easily automate the die change. CONSTITUTION:Each of a pair of turret disks 3, 5 is made conical or polygonalpyramid, this pair of turret disks 3, 5 is mounted leaving a prescribed distance from each other so that their side faces each other and can rotate around their own axes, through holes 23, 27 where the punch 21 and the die 25 are inserted are formed on each side face 3a, 5a of the turret disks 3, 5, abutting flanges 95, 105 to regulate the insertion amount of the tool to the through holes 23, 27 are projected and formed at the outer peripheral parts of the holders of the punch 21 and the die 25, and a lock device 77 for preventing the punch 21 and the die 25 inserted into the through hole 23 from coming out of the through hole by engaging the punch 21 and the die 25 therewith is provided on the turret disk turret.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret punch press, and more particularly to a tool mounting structure for holding tools such as punches and dies in a turret punch press.

0002

2. Description of the Related Art A turret punch press has a pair of upper and lower turret disks for holding tools, such as an upper turret disk for holding a punch and a lower turret disk for holding a die.

Conventionally, the upper and lower turret disks are generally
Each disk is shaped like a disk and is arranged horizontally so as to be rotatable around a vertical axis by a vertical central support shaft, facing each other vertically at a predetermined interval on each disk surface, and each disk surface has a plurality of punches. , dies are attached, and by dividing the rotation of the upper and lower turret disks, the required punches and dies are selectively positioned at the punch press processing position by the striker.

0004

[Problems to be Solved by the Invention] In the above-mentioned turret punch press, there is a pass line (movement reference plane) for the workpiece plate directly above the plate surface (upper surface) of the lower turret disk, and All of the dies attached to the platen surface are exposed to the movement reference plane, and therefore the workpiece moving on the pass line comes into contact with the top surface of the die on the platen surface of the lower turret disk, causing the workpiece to be cut during processing. There is a problem in that the workpiece plate material is easily scratched.

[0005] Furthermore, in the above-mentioned turret punch press, the vertical distance between the upper turret disk and the lower turret disk is relatively small enough to allow the workpiece to pass through. Although the punch can be easily attached and detached from the open space above the turret disk, the die must be removed from the lower turret disk from above by pushing the die up into the punch support hole of the upper turret disk using a die remover or the like. It is necessary to take out the upper turret disk from above through the punch support hole, and to install it, perform the opposite operation to remove it, which is a cumbersome operation.
Not only does it impair the workability of manual mold exchange,
This makes it difficult to change molds during processing, and the complexity of the process impedes automation of mold changes.

[0006] In contrast, a turret punch press has been considered that is configured so that the die can be pulled out laterally or downwardly from the lower turret disk, but in this case, the die exchange direction between the punch and die is are different from each other, so that the workability of manual mold changing is not significantly improved, and even if an automatic mold changing device is realized, it will be quite complex. Moreover, in this case, especially if the die is taken out downward, load support during punching (punching) becomes unstable.

In view of the above, a pair of turret disks are each formed in a conical or polygonal pyramid shape, and each pair of turret disks is arranged so that its side surfaces face each other at a predetermined interval, so that each turret disk has its own center. A turret punch press has been proposed by the same applicant as the applicant of the present application, which is rotatable about an axis and configured such that a tool is mounted on each side of the turret disk.

In this turret punch press, the portions of the pair of turret disks that face each other across the pass line of the workpiece plate are part of the side surfaces of the turret disks, and accordingly, each of the turret disks Among the tools installed on the side surface of the plate, the only tools that face each other across the pass line of the workpiece plate are a set of tools used for punch press processing at the opposing part of the turret discs; Tools, especially dies, are not exposed to the movement reference plane (pass line), and at the same time, tools other than a set of tools used for punch press processing are placed in the opposing areas of the turret disks. The tools that are not located at the center of the turret disc, but are rotated 180 degrees around the center of the turret disc with respect to the set of tools used for punch press processing on each turret disc, are located in the part that is open at the front. Since the molds can be exchanged for the tools located in this area, tools such as punches and dies on each of the two turret disks can be easily exchanged from the same direction, including during machining. As a result, mold exchange can be automated easily.

The present invention provides the above-mentioned turret punch press without impairing the above-mentioned effects.
The object of the present invention is to provide a tool mounting structure for removably mounting a punch and a die on the side surface of a turret disk.

0010

[Means for Solving the Problems] According to the present invention, a pair of turret disks each having a conical or polygonal pyramid shape is provided, and the pair of turret disks have side portions spaced apart from each other by a predetermined distance. In a tool mounting structure of a turret punch press, the turret disks are arranged so as to be rotatable around their own central axes in a form facing each other, and the tools are attached to the side surfaces of each of the turret disks. A through hole for holding the tool into which the tool is inserted is formed on the side surface of the turret disk, and a protruding abutting flange is formed on the outer periphery of the tool to limit the amount of insertion of the tool into the through hole. This is achieved by a tool mounting structure for a turret punch press, characterized in that a locking device is provided that removably engages with a tool inserted into the through hole to prevent the tool from coming out of the through hole. be done.

[0011]

[Operation] According to the above structure, the tool is inserted into the tool holding through hole from the front side of the side surface of the turret disk until the abutting flange of the tool comes into contact with the side surface of the turret disk. By simply engaging the locking device, the tool is prevented from coming out of the through hole at the normal mounting position and is fixedly attached to the turret disk, and by the reverse operation, the tool is fixedly attached to the turret disk as described above. removed tools can be removed.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 1 to 3 show an example of a turret punch press to which a tool mounting structure according to the present invention is applied. In these figures, reference numeral 1 generally indicates the straight-sided frame of the turret punch press. An upper turret disk 3 is attached to the upper frame 1a of the frame 1, and a lower turret disk 5 is attached to the lower frame 1b of the frame 1 so as to be rotatable about their respective central axes.

A fixed table 7 is provided on the lower frame 1b of the frame 1 and extends horizontally around the lower turret disk 5.
A side table 9 movable horizontally in the Y-axis direction is provided at the same height as the fixed table 7. A carriage base 11 is fixed to the side table 9, and the carriage base 11 extends in a direction perpendicularly penetrating the plane of FIG. 1 (X-axis direction). A carriage 13 is movably attached to. A work clamp 15 is attached to the carriage 13, and the work clamp 15 is configured to detachably grip a workpiece plate material (not shown). The workpiece plate gripped by the work clamp 15 is placed on a path line PL based on the upper surfaces of the fixed table 7 and side table 9.
It is designed to be able to move in the plane along the Y-axis direction and the X-axis direction.

The upper turret disk 3 and the lower turret disk 5 each have a hollow truncated conical shape, and in this embodiment, two side portions (ridge lines) 3a, 180 degrees relative rotation phase thereof, It is formed in the shape of a truncated cone with an angle of 90 degrees, and is inclined at 45 degrees so that one side (edge line) thereof is in a horizontal state parallel to the pass line PL. As a result, the central axis of the upper turret disk 3 is inclined upward by 45 degrees with respect to the horizontal pass line PL, and the upper turret disk 3 is tilted upward by 45 degrees with respect to the horizontal pass line PL.
A central support shaft 17 that extends upwardly by 5 degrees allows the upper frame 1a to be rotated in divisions around its central axis, whereas the central axis of the lower turret disk 3 is rotated with respect to the horizontal pass line PL. The lower turret disk 5 is tilted downward at 45 degrees, and the lower turret disk 5 is oriented 45 degrees to the pass line PL.
A central support shaft 19 that extends downwardly by 5 degrees allows the upper frame 1a to be rotated in sections about its central axis, and the side surface 3 of the upper turret disk 3
a and the side surface portion 5a of the lower turret disk 5 face each other at a horizontal portion with a predetermined distance therebetween.

A punch mounting hole 23 is formed in the side surface 3a of the upper turret disc 3, and a punch 21 is mounted in each of a plurality of stations set according to a predetermined divisional rotation angle of the turret disc. A die mounting hole 27 is formed in the side surface 5a of the disk 5, into which a die 25 is mounted to each of a plurality of stations provided corresponding to each station of the upper turret disk 3. The number of stations may be two or four, depending on the diameter of the turret disc.

Gear protrusions 29 and 31 are attached to the central portions of the truncated top surface 3b of the upper turret disk 3 and the truncated top surface 5b of the lower turret disk 5, respectively. The top side of each of the gear projections 29, 31 is chamfered at 45 degrees, and a pinion 33, 35 is formed in each of the chamfers. Racks 37 and 39 extending in the horizontal direction are engaged with each of the pinions 33 and 35, and the racks 37 and 39 are engaged with each other.
The reciprocating movement of the pinion 39 in the horizontal direction causes the pinions 33 and 35 to rotate forward and backward, so that the upper turret disk 3 and the lower turret disk 5 are rotated separately.

The racks 37 and 39 are guided by a plurality of upper and lower guide rollers 41 on the back and can move back and forth in the horizontal direction. Drive pinions 45 and 47 are in mesh with each other. The drive shaft 43 is rotatably supported from the frame 1 by a bearing 49, and is driven by a turret drive servo motor 5.
1, so that it can be rotated in forward and reverse directions. As a result, the upper turret disk 3 and the lower turret disk 5 are driven to rotate in synchronization with each other.

As shown in FIG. 2, frame 1 includes:
A striker support section 53 is provided, and the striker support section 53 is provided with a striker 55 that can move up and down in the vertical direction. The striker 55 is reciprocated by a striker driving means (not shown), and is horizontally driven by the symbol H in FIG. In other words, the punch 21 located at the punch press processing position is pressed.

With the above-described structure, the side surface 3a of the upper turret disk 3 and the side surface 5a of the lower turret disk 5 are processed only at the horizontal portion indicated by the symbol H in FIG. 2, that is, at the punch press processing position. Plate pass line P
Among the punch 21 and the die 25, which face each other across L and are attached to the side surface 3a of the upper turret disk 3 and the side surface 5a of the lower turret disk 5, the pass line PL of the workpiece plate is Only one pair of the punch 21 and the die 25, which are separated and face each other, is used for punch press processing at the mutually opposing portions of the upper turret disk 3 and the lower turret disk 5, in other words, at the horizontal portion H. , the other punches 21 and dies 25 on standby are not in the horizontal portion H and are not exposed to the pass line PL.

The above-mentioned pair of punches 21 and die 25 are used for punch press processing at the mutually opposing portions (horizontal portions H) of the upper turret disk 3 and the lower turret disk 5.
The punches 21 and dies 25 other than the above are not located at the opposing portions between the upper and lower turret disks, and one set of punches 21 and dies used for punch press processing in each of the upper turret disk 3 and the lower turret disk 5. The punch 21 and die 25, which are located at a position rotationally displaced by 180 degrees around the center of each turret disk with respect to 25, are both attached to the side surface 3a of the upper turret disk 3 and the side surface 5 of the lower turret disk 5.
As shown by reference numeral B in FIG. 2, the portion a is located at a portion extending in the vertical direction with the front (left side in FIG. 2) open. The punch 21 and die 25 can be exchanged by replacing the punch 21 located in the vertical part B with the front open.
In this case, the punch 21 and die 25 can be replaced from the open front space in the left-right direction in FIG. 2, as shown by arrow C in FIG. It will be held on.

FIG. 4 shows an embodiment of a tool mounting structure for a turret punch press according to the present invention. The punch mounting hole 23 formed in the side surface 3a of the upper turret disk 3 and the die mounting hole 27 formed in the side surface 5a of the lower turret disk 5 respectively fit the side surface 3a, 5a of each turret disk as shown in the figure. It is composed of a straight through hole that penetrates in a direction perpendicular to the disk surface.

In the illustrated embodiment, the horizontal portion H in the figure is
The punch mounting hole 23 and die mounting hole 27 located at A fixed sleeve 57 is fixed to the portion 3a, and an index sleeve 59 is rotatably fitted inside the fixed sleeve 57, and the punch mounting hole 23 is formed by the index sleeve 59. A gear 61 is formed in the index sleeve 59, and index rotation of the index sleeve 59 is performed by a drive gear (not shown) meshing with the gear 61. Furthermore, in the die mounting hole 27 in which the auto-index type seal mounting mechanism is incorporated, a fixing sleeve 63 is fixed to the side surface 5a.
An index sleeve 65 is rotatably fitted inside the fixed sleeve 63, and a part of the index sleeve 65 and a part of the fixed sleeve 63 form the die mounting hole 27. A gear 67 is formed in the index sleeve 65, and the index rotation of the index sleeve 65 is performed by a drive gear (not shown) that meshes with the gear 67.

Fixed engaging portions 69 and 71 are provided on the outer peripheral edges of each of the upper turret disk 3 and the lower turret disk 5, and a movable clamp is provided on the frame 1 that selectively engages with the fixed engaging portions 69 and 71, respectively. 73 and 75 are provided respectively, and by their engagement, the index sleeves 59 and 6
5 is fixed at any index rotation position.

Each of the upper turret disk 3 and the lower turret disk 5 has a punch mounting hole 23 and a die mounting hole 2.
Locking devices 77 and 79 removably engage with the punch 21 and die 25 inserted in the punch mounting holes 23 and 7 to prevent them from coming out of the punch mounting holes 23 and the die mounting holes 27, respectively. Each mounting hole 27 is provided individually. Each of the locking devices 77 and 79 is a powered type having a built-in cylinder, and has lock pieces 77a and 79a that are movable in the radial direction of the punch mounting hole 23 or the die mounting hole 27.

Note that in FIG. 4, the lower frame 1b is provided with a fluid cylinder 80.
A piston rod 80P attached to the die 25 is attached to the lower part of the die 25, and when the workpiece is not being processed, the fluid cylinder 80 is operated to lower the upper part of the die 25 below the pest line PL so as not to damage the workpiece. be.

FIGS. 5(a) and 5(b) show the structure of a punch 21 used in the tool mounting structure according to the present invention. The punch 21 includes a sleeve-shaped punch holder 81, a sleeve-shaped punch guide 85 which is a plate holder/stripper that is internally fitted into the punch holder 81 and is slidable in the axial direction guided by a guide key 83, and a punch guide. 85 and a punch body 87 that is internally fitted in the punch body 85 and is slidable in the axial direction guided by a punch key (not shown),
A lifter spring 89 is provided between the punch guide 85 and the punch guide 85.
However, stripping springs 93 are provided between the punch head 91 at the tip of the punch body 81 and the punch guide 85, and these are configured as one assembly.

The punch holder 81 has an outer diameter substantially equal to the inner diameter of the punch mounting hole 23, and is adapted to fit internally into the punch mounting hole 23. A protruding abutment flange 95 is formed to limit the amount of insertion of the punch 21 into the mounting hole 23,
A circumferential groove 97 into which the lock piece 77a of the lock device 77 enters and engages is formed in the outer circumferential portion of the abutment flange 95.

FIGS. 6(a) and 6(b) show the structure of a die 25 used in the tool mounting structure according to the present invention. The die 25 includes a sleeve-shaped die holder 99 and a die main body 105 that is inserted into a stepped die receiving hole 101 formed in the die holder 99 and fixed to the die holder 99 with a key 103. It is constructed as one assembly.

The die holder 99 has an outer diameter substantially equal to the inner diameter of the die mounting hole 27 and is adapted to be internally fitted into the die mounting hole 27, and a punch mounting hole is provided on the outer periphery of the die holder 99. An abutment flange 105 for limiting the amount of insertion of the punch 21 into the punch 23 is formed protrudingly, and a circumferential groove 107 into which the lock piece 79a of the locking device 79 enters and engages is formed on the outer periphery of the abutment flange 105. .

To attach the punch 21 having the above-described structure to the upper turret disk 3, the punch head 91 is placed in the punch holding hole 23 located at the vertical portion B of the side surface 3a of the upper turret disk 3, with the punch head 91 at the top. In other words, place the punch holder 8 with the cutting edge side of the punch body 87 facing you.
1 is inserted until its abutting flange 95 abuts against the turret surface, and the locking piece 77a of the locking device 77 enters into and engages with the circumferential groove 97, thereby completing the process.

Furthermore, mounting the die 25 on the lower turret disk 5 is achieved by attaching the die 25 to the lower turret disk 5.
Insert the die holder 99 with the die body 103 toward you into the die holding hole 27 located in the vertical part B until the abutment flange 105 of the die holder 99 comes into contact with the turret surface, and then insert the die holder 99 into the die holding hole 27 located in the vertical part B of the die holding hole 27, and then insert the die holder 99 with the die body 103 on the front side until the abutting flange 105 of the die holder 99 comes into contact with the turret surface. The process is completed by entering and engaging 79a into the circumferential groove 107.

For use, the punch 21 installed as described above is moved to the horizontal part H by rotation of the upper turret disk 3.
When the lock piece 77a of the lock device 77 is engaged with the circumferential groove 97, the lock piece 77a is prevented from falling from below. In this case, when the punch 21 is used, the only downward force acting on the support portion of the punch 21 is the reaction force of the spring that supports the weight of the punch 21, so this is sufficient.

When the die 25 mounted as described above is brought to the horizontal portion H by the rotation of the lower turret disk 5 for use, the die body 103 is inserted into the die receiving hole 1.
01, so that the punching load can be stably received.

The punch 21 is removed from the upper turret disk 3 and the die 25 is removed from the lower turret disk 5.
To remove it more easily, it is sufficient to perform the opposite operation to the above-mentioned installation.

Therefore, the attachment and removal of the punch 21 to and from the upper turret disk 3 and the attachment and removal of the die 25 to and from the lower turret disk 5 all occur in the same manner as indicated by arrow C in FIG. direction, and the butt flanges 95, 10
5 comes into contact with the turret surface, thereby ensuring the positioning of the punch 21 and die 25.

In the embodiment described above, the upper turret disk 3 and the lower turret disk 5 are rotationally driven by the racks 37, 39 and pinions 33, 35; Any device may be used as long as it can drive the upper turret disk 3 and the lower turret disk 5 to rotate synchronously. In the above embodiment, the upper turret disk 3 and the lower turret disk 5 have a truncated conical shape, but this is different from the station. It may be a truncated polygonal pyramid with a corresponding number of angles.

[0038]

As can be understood from the above explanation, according to the tool mounting structure of the turret punch press according to the present invention, the tool can be brought into contact with the through hole for holding the tool from the front side of the side surface of the turret disk. The flange is inserted until it comes into contact with the side surface of the turret disk, and simply by engaging the locking device with the tool in this state, the tool is prevented from coming out of the through hole at the normal installation position and is fixedly installed on the turret disk. Since the tool fixedly attached to the turret disk can be removed by the opposite operation as described above, a set of tools such as punches and dies can be easily replaced, all from the same direction. Accordingly, mold exchange can be easily automated.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of a turret punch press to which a tool mounting structure according to the present invention is applied.

FIG. 2 is a sectional view along line II-II in FIG. 1;

FIG. 3 is a sectional view along line III-III in FIG. 1;

FIG. 4 is a longitudinal sectional view showing an embodiment of the tool mounting structure of the turret punch press according to the present invention.

FIG. 5 is a longitudinal sectional view showing the structure of a punch used in the tool mounting structure of a turret punch press according to the present invention.

FIG. 6 is a longitudinal sectional view showing the structure of a die used in the tool mounting structure of a turret punch press according to the present invention.

[Explanation of symbols]

1 Frame 3 Upper turret disc 5 Lower turret disc 7 Fixed table 9. Side table 11 Carriage base 13 Carriage 21 Punch 23 Punch mounting hole 25 die 27 Die mounting hole 33 Pinion 35 pinion 37 Rack 39 Rack 51 Turret drive servo motor 55 Striker 59 Index sleeve 65 Index sleeve 77 Lock device 79 Lock device 81 Punch holder 85 Punch guide 87 Punch body 95 Butt flange 97 Circumferential groove 99 Die holder 103 Die body 105 Butt flange 107 Circumferential groove

Claims (1)

[Claims] 1. A turret disc comprising a pair of turret discs in the shape of a cone or a polygonal pyramid, each of the pair of turret discs being rotatable around its own central axis with side faces facing each other at a predetermined interval. In the tool mounting structure of the turret punch press, the tool mounting structure is configured such that a tool is mounted on each side surface of the turret disk, and the side surface of the turret disk is provided with a through hole for holding a tool into which the tool is inserted. is formed, and an abutment flange is formed protruding from the outer periphery of the tool to limit the amount of insertion of the tool into the through hole, and the turret disk is removably engaged with the tool inserted into the through hole. A tool mounting structure for a turret punch press, characterized in that a locking device is provided to prevent the tool from coming out of the through hole.