KR100225297B1 - Punch press and method of punching plate-type workpiece by the press - Google Patents

Abstract

The punch press comprises a pair of disk-type tool holders 15U and 15L rotatably mounted on the supporting portions 11U and 11L, one of the holders 15U for conveying a plurality of punch tools 17P, and a workpiece ( Another holder 15L for conveying a plurality of die tools 17D which cooperated with the punch tool 17P to punch W), a vertically movable ram 61, and a desired tool attached to a pair of tool holders. The punch and die tool may be movable to an indexed position to change the direction of the tool as it rotates the pair of toolholders and includes a striker 19 attached to the ram.

Description

Punching and punching method of plate workpiece by punch press

1 is a front view of a punch press according to the present invention.

2 is a plan view showing the main part of the punch press of FIG.

3 is a plan view of an essential part showing a change in the direction of the punch tool and the die tool.

4 is another plan view of the main part showing a change in the direction of the punch tool and the die tool.

5 is an enlarged cross-sectional view of the striker device of the punch press shown in FIG.

6 is a bottom view of the striker shown in FIG.

7 is a sectional view showing a second embodiment of the main part.

8 is a sectional view showing a third embodiment of the main part;

The present invention relates to a punch press and a plate-shaped workpiece punching method, specifically, a punch press having a disk-shaped rotatable pair or two or more pairs of tool holders each equipped with a plurality of punches or dies, and using the punch press It relates to a plate-shaped workpiece processing method.

Conventional punch presses include a frame, an upper turret and a lower turret rotatably mounted on the frame so as to transport a plurality of punch tools and die tools from the outer periphery of the turret, and mounted to the frame to strike one of the punches. Turret punch presses composed of a striker are known. When punching the workpiece, the punch to be hit is located under the striker or ejected.

Japanese Patent Publication No. 52-27393 discloses a turret punch having an upper turret and a lower turret in which a plurality of punches and dies are arranged in a plurality of concentric circles such that a plurality of punches and dies are respectively aligned in a change direction of the upper turret and the lower turret. A press is disclosed. This turret punch press has a striker movable in the radial direction of the turret.

U. S. Patent No. 4412469 discloses a turret punch press having an upper turret and a lower turret supporting a rotatable punch tool and a die tool. The punch tool and die tool can be rotated to be in the desired position or to be repositioned.

Another US Pat. No. 4,768,180 discloses a turret punch press having an upper turret and a lower turret equipped with a pair of rotatable disc tool holders on which a plurality of punch tools and die tools are mounted. The position or direction of the tool is changed by the rotation of the tool holder.

In the turret punch press described above having a plurality of punch tools and an upper turret and a lower turret for conveying a die tool, the turret is rotated or ejected to determine the position of the tool relative to the striker. After the turret is repositioned as described above, the tool holder is rotated so that certain tools are ejected under the striker. The punch tool and the die tool are mounted so as not to move in the holder, they do not automatically rotate relative to the holder. The tool may be rotatably mounted to the holder. However, to make such a complicated structure in which the tool is rotatably mounted in the rotatable holder mounted on the rotatable turret, the tool portion and the holder portion must be made larger, thus requiring more space.

It is a primary object of the present invention to provide an improved punch press in which the striker of the press can move to a predetermined position where the punch tool and die tool of the press are ejected by rotation of a tool holder rotatably mounted on the press.

The punch press of the present invention includes a tool holder portion for supporting a pair of disk-shaped tool holders, a vertically reciprocating ram, and a striker mounted to the ram, wherein one of the tool holder portions has a plurality of punches. The tool is mounted and the other holder portion is equipped with a plurality of die tools which cooperate with the punch tool to punch the plate-shaped workpiece, the striker being movable on the punch tool and the die tool positioned by the rotation of the tool holder.

In the above structure, when the pair of tool holders rotate, the directions of the punch tool and the die tool mounted on the tool holder are changed. For example, when the punch tool and the die tool rotate 90 degrees to face in the X axis direction, the tools rotate in the Y axis direction perpendicular to the X axis direction. In other words, the tool moves to a position 90 degrees out of phase from its original position with respect to the turning radius of the tool.

The striker striking the punch tool mounted on the punch holder can move to the position where the tool is ejected by changing the direction and position of the tool holder, so that the workpiece can be punched even if the direction and position of the punch tool and the die tool are changed. .

FIG. 1 is a front view of the punch press 1 according to the present invention, and FIG. 2 is a plan view of the main part of the punch press.

The punch press 1 has a door frame 3 composed of an upper frame 3U and a lower frame 3L. The lower frame 3L is provided with a work table 5 for supporting the plate-shaped work W. As shown in FIG. The frame 3 also includes a workpiece clamp 7 for clamping the workpiece W, and a workpiece positioning mechanism 9 for moving the workpiece W in the X- and Y-axis directions so that the workpiece is in position. It is prepared. The workpiece positioning mechanism 9 is known and used for a conventional turret punch press, so further description thereof will be omitted.

The upper frame 3U and the lower frame 3L of the frame 3 support the upper turret 11U and the lower turret 11L, respectively, rotating about the shaft 13 (see FIG. 2). Since the structure of mounting the upper turret 11U and the lower turret 11L to the frame 3 is similar to that of the conventional turret punch press, further description will be omitted.

In this embodiment, the upper turret 11U and the lower turret 11L serving as tool holder supports supporting the punch holder 15U and the die holder 15L are in the form of beams or bars. The punch holder 15U and the die holder 15L are rotatably mounted to the middle portions of the upper turret 11U and the lower turret 11L. The plurality of punch tools 17P and die tools 17D are mounted concentrically to the punch holder 15U and the die holder 15L.

In order to punch the workpiece W by striking the punch tool 17P, the upper frame 3U of the frame 3 includes a vertically movable striker device 21 having a striker 19.

The structure for rotating the turrets 11U and 11L may be the same as that of the conventional turret punch press. However, in this embodiment, the turret or beam can rotate 180 °. Therefore, as shown in FIG. 2, each turret is rotated by pinion 23 and rack 25. The pinion 23 is mounted to the shaft 13 of the turret, which is engaged with the rack 25 reciprocating by a known actuator (not shown), such as a pneumatic cylinder or a hydraulic cylinder.

In order to fix the upper turret 11U and the lower turret 11L rotated and positioned, catch blocks 27 are provided at both ends of the turret, and the lock pin 29 and the hydraulic cylinder 31 are provided in the frame 3. Is prepared. The hydraulic cylinder 31 operates so that the lock pin 29 engages with the catch block 27, thereby fixing the turret in position.

On the outer circumferential surfaces of the disk-shaped tool holders 15U and 15L, worm gears 33U and 33L are engaged with rotatable worms 35U and 35L mounted on the turrets 11U and 11L. The shafts 37U and 37L of the worms 35U and 35L extend outwards from the turret. Clutch screws 39U and 39L are attached to ends of the shafts 37U and 37L.

The frame 3 has a pair of pulleys 43 and 43 and another pair of pulleys or upper portions to rotate the tool holders 15U and 15L through the worms 35U and 35L (the supporting structure is not shown). The pulley 47U and the lower pulley 47L are used to support the servo motor 41 (the support structure is not shown). The upper pulley 47U and the lower pulley 47L are disposed to face the worms 35U and 35L. As shown in FIGS. 1 and 2, the upper drive belt 45U expands around one pulley 43 and the upper pulley 47U of the servo motor 41, and the lower drive belt 45L extends the servo. It expands around one pulley 43 and lower pulley 47L of the motor 41. The upper drive belt 45U and the lower drive belt 45L are tensioned by the plurality of tension pulleys 49. The shafts of the upper driven pulley 47U and the lower driven pulley 47L are respectively coupled with the upper spline shaft 51U and the lower splined shaft 51L, and each spline shaft is a clutch screw of the worm (35U or 35L) ( 39U or 53L at one end thereof to engage with 39U or 39L. In order to engage and disengage the clutch screws 53U or 53L and the clutch screws 39U or 39L of the worms 35U or 35L, the frame 3 is equipped with clutch cylinders 55U and 55L. Shifter arms 57U and 57L (shifter arms) are mounted at one end of the piston rod of the clutch cylinder 55U or 55L. The shifter arms 57U and 57L are fitted in the outer circumferential grooves of the clutch screws 53U or 53L to allow the clutch screws 53U or 53L to reciprocate with respect to the opposing clutch screws 39U or 39L.

The clutch screws 53U, 39U or 53L, 39L operate the clutch mechanism 59, which is composed of the clutch screws 39U, 53U and the clutch cylinder 55U, or the clutch screws 39L, 53L and the clutch cylinder 55L. If they do, they are engaged or released. By driving the servo motor 41 while the clutch mechanism 59 is connected, the punch tool holder and the die tool holder rotate simultaneously in the same direction, so that the punch tool and the die tool to be hit of the tool holder are the striker device 21. ) Is pulled out or positioned relative to the striker 19.

When the position fixing of the turret by the lock pin 29 is released and the clutch screws 39U, 53U and 39L, 53L are removed, the turrets 11U, 11L rotate to eject the desired tool holder.

As can be understood from the foregoing description, the tool holders 15U and 15L rotate about the upper turret 11U and the lower turret 11L. When the tool holder is rotated by 90 ° with respect to the turret, the direction (longitudinal direction) of the punching portion P of the tools 17P and 17D is in the Y-axis direction shown in FIG. 4 from the X-axis direction shown in FIG. The phase or position of the punch tool 17P and the die tool 17D is changed by 90 degrees. The direction of the punching portion P or the tools 17P and 17D and the position of the tool are changed as desired by controlling the rotation of the holder.

The striker 19 of the striker device 21 needs to be moved in relation to the positional change of the punch tool 17P and the die tool 17D. In this embodiment, the striker 19 is designed to be able to move to the changed position of the tool.

On the frame 3 is mounted a ram 61 that is vertically movable operated by a conventional hydraulic cylinder mechanism (not shown) or the like. The striker device 21 is arranged below the ram 61 and has a striker 19 that is movable to change its position.

5 and 6 show the striker device 21 in detail. The support plate 63 is fixed to the lower part of the ram 61 by a bolt etc. (not shown). The casing 67 is integrally attached to the support plate 63 by the plurality of bolts 65. The casing 67 supports the cylindrical rotating body 71 from the inside through the plurality of bearings 69.

The outer annular surface of the lower portion of the rotor 71 is formed with a worm gear 73 that meshes with the rotatable worm 75 mounted on the casing 67. This worm gear 73 is rotated by the servo motor 77 (see FIG. 6) mounted on the casing 67. As shown in FIG. The guide member 79 extending in the radial direction of the rotor 71 is attached to the bottom of the rotor 71 by bolts. The guide member 79 supports a block 81 that moves along the guide member 79 while transporting the striker 19. In order to move the block 81 along the guide member 79, a transfer cylinder 83 is mounted at one end of the guide member 79. The free end of the piston rod 83R is coupled to the transfer cylinder 83 to reciprocate the block 81 and transfers the striker 19.

When the transfer cylinder is activated, the block 81 for transporting the striker 19 moves in the radial direction of the rotor 71. Therefore, the striker 19 moves to the center of the tool holders 15U and 15L or in the radial direction. Since the striker 19 can rotate even if the striker 19 is located outside the center of the rotor 71, the striker 19 is positioned in accordance with the change of the position of the punch tool 17P and the die tool 17D. You can go to The rotation radius of the striker 19 is preferably the same as the rotation radius of the punch tool 17P and the die tool 17D.

The upper portion of the striker 19 protrudes upward from the block 81 and is received in the groove 71G formed in the lower portion of the rotating body 71. A sheer plate 85, an anvil block 87 and a power transmission block 89 are provided between the support plate 63 and the upper portion of the striker 19. The ram 61 transmits a pressing force to the striker 19 through the sheer plate 85 and the blocks 87 and 89. Due to this structure, even when the ram 61 overloads the sheer plate 85, other members are prevented from being damaged.

When the workpiece W is punched by a pair of selected punch tools 17P and die tools 17D mounted on the tool holders 15U and 15L, and the position and direction of the tool are changed by the rotation of the tool holder. The servo motor 77 operates to rotate the rotor 71 to move the striker 19 to the position where the tools 17P and 17D are transferred.

7 shows a second embodiment of the movement mechanism for moving the striker 19 to the desired position. In the second embodiment, the X-axis guide member 91 extending in the X-axis direction is mounted below the ram 61, and the X-axis guide member 91 is provided with the X-axis slider 95. The X-axis slider 95 is moved along the X-axis guide member 91 by the X-axis cylinder 93. The X-axis slider has a Y-axis groove 97 extending in the Y-axis direction substantially perpendicular to the X-axis direction. The Y-axis slider 101 moved by the Y-axis cylinder 99 is slidably coupled to the Y-axis groove 97 in the X-axis slider 95 in the Y direction. The striker 19 is fixed to the Y-axis slider 101. The Y-axis cylinder 99 is installed in such a manner as to extend in the X-axis direction and penetrate the long hole 91H formed in the X-axis guide member 91.

In the above-described structure, the striker can move in the X-axis and Y-axis directions with respect to the change of the position of the tool.

8 shows a third embodiment of a movement mechanism for moving the striker 19 to the desired position. In the third embodiment, the first striker 19A is installed in the center of the rotating body 103 mounted to the ram 61 similarly to the first embodiment of the present invention. The same reference numerals are designated for members having the same functions as in the first embodiment. The second striker 19B is separated by a distance e from the first striker 19A.

In this structure, the first striker 19A strikes a punch tool mounted in the center of the punch holder, and the second striker strikes a plurality of punch tools mounted in the punch holder spaced apart from the center of the holder. .

Claims (4)

A tool holder support (11U, 11L), a pair of tool holders (15U, 15L) rotatably mounted on the tool holder supports (11U, 11L), and a vertically movable ram (61), One tool holder 15U of the pair of tool holders is equipped with a plurality of punch tools 17P, and another tool holder 15L is equipped with a plurality of die tools 17D for punching the work W in cooperation with a punching tool. Is mounted, and the ram 61 is provided with a rotating body 71 rotatable about the ram 61 and a striker 19 rotatably mounted to the rotating body 71. Is configured to change the position of the striker 19 to a position corresponding to a change in position of the punching tool 17P and the die tool 17D due to the rotation of the pair of tool holders 15U and 15L. Punch press, characterized in that. A tool holder support (11U, 11L), a pair of tool holders (15U, 15L) rotatably mounted on the tool holder supports (11U, 11L), and a vertically movable ram (61), One tool holder 15U of the pair of tool holders is equipped with a plurality of punch tools 17P, and the other tool holder 15L is provided with a plurality of die tools 17D for punching the work W in cooperation with the punch tool. ) Is mounted, the ram 61 is provided with a first slider 95 that is movable in the X-axis direction, and the first slider 95 is moved in the Y-axis direction substantially perpendicular to the movable X-axis direction. By attaching the striker 19 to the second slider 101 possible, the position corresponding to the positional change of the punching tool 17P and the die tool 17D by the rotation of the pair of tool holders 15U and 15L. It is configured to be able to change the position of the striker 19 to Punch presses that. A tool holder support (11U, 11L), a pair of tool holders (15U, 15L) rotatably mounted on the tool holder supports (11U, 11L), and a vertically movable ram (61), One tool holder 15U of the pair of tool holders is equipped with a plurality of punch tools 17P, and the other tool holder 15L is provided with a plurality of die tools 17D for punching the work W in cooperation with the punch tool. ) Is mounted on the ram 61 and a striker mounted on the rotor 71 at a distance from the lower center of the rotor 71 and a rotor 71 rotatable about the ram 61. 19 is provided, thereby changing the position of the striker 19 to a position corresponding to the positional change of the punching tool 17P and the die tool 17D due to the rotation of the pair of tool holders 15U and 15L. Punch press, characterized in that configured to be. One tool holder 15U is equipped with a plurality of punch tools 17P, and the other tool holder 15L has a plurality of die tools 17D for interacting with the punch tool 17P to punch the workpiece W. FIG. Punching for punching a plate-shaped work piece using a punch press having a tool holder support portion 11U, 11L (15U, 15L) and a striker 19 on which a pair of disc shaped tool holders 15U, 15L are supported. As a method, punching changes the position of the striker 19 to a position corresponding to a change in position of the punching tool 17P and the die tool 17D by the rotation of the pair of tool holders 15U and 15L. Punching method characterized in that it is carried out by configuring to enable.