JPH0337787Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a die support device in a punch press, and more specifically, it is capable of attaching and detaching the die from the horizontal direction, and is capable of accurately positioning the die. The present invention relates to a die support device that can be fixed.

[Prior Art] Conventionally, in a punch press equipped with an automatic mold exchange device, a device for supporting a die on a die holder is known as disclosed in Japanese Patent Application Laid-Open No. 49-52388. This die support device is provided with a vertically rotatable tightening arm on a support base, and facilitates attachment/detachment and fixation of a die holder to a die show.

[Problem that the invention attempts to solve]

In the previous example described above, the tightening arm is configured to swing from a horizontal state to a vertical state, and the configuration is such that a pin provided on a piston rod that moves vertically is engaged with a slot formed in the tightening arm. Since this type of cam mechanism is used, in order to swing the tightening arm from a horizontal position to a vertical position, the stroke of the piston rod must be relatively long, and a large cylinder is required. . Furthermore, since the tightening arm swings from a horizontal state to a vertical state, the operating area of the swing arm is required to be relatively large, making it difficult to miniaturize the overall configuration.

(Means for Solving the Problems) In order to solve the conventional problems as described above, the present invention has a punch attached to the ram and a punch attached to the frame of the punch press at a position below the ram that is movable up and down. A die holder supporting a corresponding die is provided, the die is provided on the upper surface of the die holder so as to be horizontally removable, and an abutting surface that can freely abut with the abutting surface of the die is provided on the upper surface of the die holder, A presser piece for pressing and fixing the die to the abutment surface is provided on a pin attached to the die holder so that it can move up and down, move in and out of the upper surface of the die holder, and swing freely in the direction of pressing the die, and is attached to the die holder. An elastic body is interposed between the vertically movable piston rod of the cylinder and the inclined lower surface of the presser piece, and the piston rod is also provided to freely press the presser piece in the direction of pressing the die. be.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

First, in order to facilitate understanding of the present invention, the overall configuration of a punch press 1 on which the present invention can be implemented will be described.

Now, referring to FIGS. 1 and 2, in a punch press 1 in which the present invention can be implemented, a C-shaped frame 9 that supports a punch 3, a die 5, a ram 7, etc. has a box-shaped lower part. frame 11,
It consists of an intermediate frame 13 provided behind the lower frame 11, that is, on the right side in FIG. 2, and a box-shaped upper frame 15 provided on the intermediate frame 13.

More specifically, the lower frame 11 and the intermediate frame 13 are integrally provided by welding or the like. The lower member 15A of the upper frame 15 is placed on the upper member 13A of the intermediate frame 13, and a plurality of tie rods, for example, two tie rods, are placed from above the upper frame 15 on the left side of the intermediate frame 13 in FIGS. 17 is vertically connected to the intermediate frame 13 and the lower frame 11. When connecting, an appropriate preload is applied to the tie rod 17 to prevent bending. A reinforcing plate 19 is placed on the lower member 15A of the upper frame 15 on the right side of the tie rod 17, and a plurality of bolts 21 are connected to the lower member 15A of the upper frame 15 and the intermediate frame 1 from above the plate 19.
The upper member 13A of No. 3 is screwed and fixed. Between each plate material 19, the plate material 19 and the upper frame 1
A support member 23 is inserted between the support member 23 and the upper member 15B of No. 5 for reinforcement.

Therefore, the tie rod 17 applies an appropriate preload force to the upper frame 15 and the intermediate frame 1.
3, it becomes possible to enlarge the gap between the upper frame 15 and the intermediate frame 13. Also,
The bending of the upper frame 15 is greatly reduced, and the frame 9 can be easily manufactured, and the processing accuracy of the workpiece W can be improved.

A C-shaped swan neck holder 25 is fixedly provided on the lower frame 11 by, for example, welding, in the pocket between the upper frame 15 and the lower frame 11.

A die 5 is attached to the left end of the lower frame 11 in FIG. A punch 3 is attached to the tip side of a swan neck holder 25 above the die 5. Since the punch 3 and the die 5 are a pair of molds, both are vertically aligned. In FIGS. 1 and 2, a ram drive device 27 is provided at the left end of the upper frame 15, and a ram 7 is attached to the lower part of the ram drive device 27 so that it can move up and down.

A bed 29 is arranged on the front side of the lower frame 11, that is, on the left side of the lower frame 11 in FIG. 2, and is integrated with the lower frame 11 by welding or the like. A guide member 31 is placed on the bed 29.
is placed on the guide member 31, and a rail 33 is placed on the guide member 31.
Extends in the axial direction. A slider member 37 attached to the lower part of the projection 35T of the carriage base 35 and extending in the Y-axis direction is guided by the rail 33 and is movable in the Y-axis direction.

That is, in FIGS. 1 and 2, the Y-axis motor 39 is attached to the left end side of the bed 29, approximately at the center in the X-axis direction. Rotation from the Y-axis motor 39 is transmitted to the feed screw 4 via gears, etc.
1. The carriage base 35 is attached to the feed screw 41, and the rotation of the feed screw 41 moves the carriage base 35 in the Y-axis direction.

The carriage base 35 has a base 35M and a protrusion 3.
It is formed from 5T and has a carriage base of 35
The shape is symmetrical with respect to the center line in the X-axis direction. Therefore, the weight of the carriage base 35 is balanced with respect to the center line in the X-axis direction.

As is clear from FIG. 2, the X-axis motor is located approximately at the center in the X-axis direction of the plurality of guide members 31, for example, two guide members 31 guiding the carriage base 35, that is, at a position where the load on the guide members 31 is approximately uniform. 43 is installed. The X-axis motor 43
A feed screw 45 is provided extending along the X-axis direction, and one end of a carriage 47 is attached to the feed screw 45. At the base 35M of the carriage base 35, a guide member 49 is provided extending along the X-axis direction toward the right side in FIG. It is attached to extend in the axial direction. A slider member (not shown) is supported at the bottom of the carriage 47, and the slider member is guided by the rail 51 and moved in the X-axis direction. Therefore, the X-axis motor 4
3 is transmitted to the feed screw 45, and the slider member supported at the bottom of the carriage 47 is moved to the rail 5.
1, the carriage 47 is
It is moved freely in the axial direction.

The carriage 47 is provided with a clamp 53 for gripping the workpiece W. More specifically, as shown in FIGS. 1 and 2, the carriage 47
For example, two clamps 53 are provided on the right side. After the workpiece W is brought in from the front side in FIG. 1 and positioned by contacting the positioning stopper 55 provided on the rear side, the clamp 5
It is clamped by 3.

In order to support the workpiece, movable tables 57 are provided on both sides of the bed 29 at the front and rear in FIG. Therefore, the movable table 57 is moved together with the carriage base 35 in the Y-axis direction.

Movable table 5 provided on both sides of bed 29
A caterpillar table 59 for supporting the work W is provided between the two. More specifically, the caterpillar table 59 is formed with a width slightly larger than the diameter of the die 5. Both ends thereof are connected to two slider members 37 attached to the lower part of the carriage base 35. Moreover, the caterpillar table 59 is wound around a plurality of sprocket wheels 61, for example four sprocket wheels, which are provided on the left and right sides of the bed 29 in FIG. Therefore, the Y-axis motor 39 moves the carriage base 35
The movable table 5 moves in the Y-axis direction.
Similarly to 7, the caterpillar table 59 is also moved in the Y-axis direction.

As is clear from FIG. 1, a large number of rollers 63 are provided on the movable table 57 at appropriate intervals, and a large number of rollers 63 are provided on the caterpillar table 59 at appropriate intervals, similar to the rollers 63 described above. rollers 65 are provided. When the workpiece W placed on the rollers 63 and 65 moves in the Y-axis direction, the rollers 63 and 65 do not rotate, but when the workpiece W moves in the X-axis direction, the rollers 63 and 65 do not rotate. 63 and the roller 65 rotate and serve to smoothly move the workpiece W in the X-axis direction.

Therefore, the X-axis motor 43 is provided approximately at the center of the base 35M of the carriage base 35 in the X-axis direction, and
5 is symmetrical with respect to the center line in the X-axis direction, so that the carriage 47 is
In the figure, even if the workpiece W moves toward the front as shown by the two-dot chain line, the weight is balanced, so the inclination of the workpiece W is extremely small. Since the inclination of the workpiece W is extremely small, the machining accuracy during machining is further improved, and since there are no obstacles in front of the X-axis motor 43, workability during manufacturing and assembly is improved.

Furthermore, since only one pair of molds consisting of the punch 3 and the die 5 is provided in this embodiment, the sliding area on the back surface of the workpiece W is extremely small.
The occurrence of scratches on the back side of the workpiece W is drastically reduced. Furthermore, by narrowing the width of the caterpillar table 59, when the movable table 57 is moved in the Y-axis direction, the vertical swing of the caterpillar table 59 is extremely small, and the weight of the caterpillar table 59 itself is also reduced. Therefore, the positioning accuracy of the workpiece W is improved and the noise is also reduced.

The first part on the rear side of the mold with the punch 3 and die 5 as a pair.
A transport caterpillar table 67 is provided on the right side in the figures and FIG. More specifically, this transport caterpillar table 67 supports the vicinity of the end opposite to the end where the workpiece W is held by the clamp 53, and also supports the vicinity of the end opposite to the end where the workpiece W is held by the clamp 53. It is something. This conveyor caterpillar table 67 is located on both sides of the lower frame 11.
It is wound around a plurality of, for example two, sprocket wheels 69 provided on the left and right sides in the figure.

Therefore, the transport caterpillar table 67 is moved in the Y-axis direction by a drive device (not shown).
This movement of the conveying caterpillar table 67 in the Y-axis direction is preferably performed in synchronization with the movement of the caterpillar table 59 described above. When carrying out the processed workpiece W, the carriage base 35 is
In the figures and Fig. 2, the center of gravity of the workpiece W is moved to the right in the Y-axis direction and
After moving up to 7, transport caterpillar table 67
The workpiece W is transferred to the outside of the machine through the notch 71 on the rear side of the intermediate frame 13 by moving only the intermediate frame 13 to the right.

Furthermore, as is clear from FIG. 1, a large number of rollers 73 are provided on the conveying caterpillar table 67 at appropriate intervals. This roller 73, like the rollers 63 and 65 described above, functions to smoothly move in the X-axis direction.

In FIG. 1, the conveyor caterpillar table 67
The left side of the can be lowered. That is, the fluid cylinder 75 is installed in a part of the lower frame 11.
is attached, and one end of the piston rod 77 of the fluid cylinder 75 is attached to the left side of the bracket 79 supporting the sprocket wheel 69. By activating fluid cylinder 75 and lowering piston rod 77, left sprocket wheel 69 is lowered. The reason why the left side of the transport caterpillar table 67 can be lowered is to make it possible to carry out small-sized workpieces that have been cut off by cutting out the outline of the workpiece W such as a large-sized regular-sized plate. be. Note that even if the entire caterpillar table 67 is lowered uniformly, it is possible to carry out small-sized processed products.

Next, a ram drive device 27 for raising and lowering the ram 7 is provided on the tip side of the upper frame 15, particularly on the left side in FIG. More specifically, as is clear from FIGS. 1 and 2, the drive motor 81 is located approximately in the center between the upper members 15B of the upper frame 15.
A support member 15C that supports the is placed. A pulley 83 is attached to the inside of the left frame 15D of the upper frame 15. The drive motor 81 and pulley 83 are connected by a shaft 85.

Therefore, the rotation of the drive motor 81 is transmitted to the pulley 83 via the shaft 85. The casing 87 of the ram drive device 27 is attached to the left frame 1.
The outside of 5D fits into it. Inside the casing 87, a crankshaft 89, a connecting rod 91, a pulley 93, a belt 95 such as a timing belt, a ram 7, and the like are integrally assembled. A belt 95 is wound around the pulley 83 and pulley 93. Also,
Crankshaft 89 has connecting rod 9
1 are connected to each other, and the ram 7 is attached below the connecting rod 91 via a connecting screw (not shown).

Therefore, the rotation transmitted to the pulley 83 is
It is transmitted to the crankshaft 89 via the belt 95 and pulley 93. crankshaft 89
The rotation of the ram 7 causes the ram 7 to move up and down via the connecting rod 91, and since the punch 3 is attached to the lower end of the ram 7 via a punch holder, the punch is moved up and down.

An automatic die changer 97 is disposed close to the outside of the punch press 1. More specifically, as shown in FIG. 1, a plurality of mold storage racks 99, 101, for example, two mold storage racks 99 and 101, are provided beside the automatic mold changer robot 97, facing each other at 90 degrees. be. For example, a plurality of punches 3 to be replaced are stored in the mold storage rack 99. A plurality of dies 5 to be replaced are stored in the mold storage rack 101.

The automatic mold changing device robot 97 has a C-shaped frame 105 equipped with a control device (not shown) attached to an upright rotating shaft 103.
A pivot casing 107 that is movable and rotatable is attached to a pivot shaft 103 between mold-shaped frames 105.

The rotating casing 107 is provided with a telescopic mechanical handle 109 capable of clamping and unclamping the punch 3 and die 5 of the mold. Therefore, the automatic mold changing device robot 9
To replace the molds of the punch 3 and die 5 in step 7, the mechanical handle 109 is used to pick up the punch and die 5 attached to the punch press 1 and clamp them.

In this state, the mechanical handle 109 is turned to store the mold in an empty storage section of the mold storage rack 99 or 101. Then the required punch 3
Alternatively, place the die 5 in the mold storage rack 99 or 1.
The punch 3 and die 5, which are the next molds, are selected from 01 and clamped, and the mechanical handle 109 is rotated again to attach them to the punch press 1, thereby changing the molds.

In addition, as shown in FIGS. 1 and 2, a worm wheel (not shown) meshing with a worm shaft 113 rotated by a mold rotation drive motor 111 attached to the intermediate frame 13 punches the punch. 3 is rotated. On the other hand, the worm shaft 113 is connected to another worm shaft 117 via a connecting member 115. This worm shaft 117 meshes with a worm wheel 119 built into the lower arm 25D of the swan neck holder 25, as shown in FIGS. 3 and 4. This worm wheel 1
19 is supported on the lower arm 25D of the swan neck holder 25 via a plurality of bearings 121, for example, three.

With the above configuration, the mold rotation drive motor 111
When driven, the worm wheel 119 rotates via the worm shaft 113, the connecting member 115, and the worm shaft 117, and the die 5 is accordingly rotated and indexed for press working.

Die holder 123 is placed on the worm wheel 119.
is supported, and the die 5 is attached to this die holder 123.

In order to accurately position the die 5 with respect to the die holder 123, a V-shaped abutment surface 123T is provided on the upper surface of the die holder 123, as shown in FIGS. 3 and 4. 1
The V-shaped contact surface of the die 5 is in contact with 23T. Then, the die 5 is attached to the die clamp device 125.
It is pressed and fixed to the abutment surface 123T of the die holder 123 by.

The die clamp device 125 is connected to the die holder 12.
3 is provided. More specifically, the cylinder 127 of the die clamp device 125 is connected to the die holder 12.
It is installed on 3. A recess 131 is formed in the piston rod 129 of the cylinder 127.
31, an elastic body 133 made of urethane, and the elastic body 1
A presser foot 135 is attached on top of 33. Although the urethane of the elastic body 133 is depicted as a trapezoid with an inclined upper side in FIG. 5, it is normally shaped like a rectangular parallelepiped. The bottom surface of the presser foot 135 is an inclined surface as shown in FIG. 5, and as can be understood from FIGS. 1
The elongated hole 29 is vertically longer than the elongated hole of the presser piece 135), and both ends of the pin 139 passing through this elongated hole 137 are fixed to the cylinder 127. An air passage 141 provided in the axial direction of the worm wheel 119 communicates with the rear portion of the cylinder 127 in FIG.

In the above configuration, the piston rod 129 in the cylinder 127 is in a lowered state, and the presser foot 135 is slightly lowered from the state shown in FIGS. 3 and 5 and is in a state of swinging in a counterclockwise direction. Sometimes, when air is supplied to the air passage 141 to operate the cylinder 127, the piston rod 129
begins to rise. When the piston rod 129 is raised, the presser foot 135 is raised via the elastic body 133. And the elongated hole 137 of the presser foot piece 135
When the lower part of the presser foot 135 comes into contact with the pin 139, the presser foot 135 stops at this position, and when the cylinder 127 continues to operate, only the piston rod 129 rises, and the urethane of the elastic body 133 inserted into the recess 131 is gradually compressed. be done. Therefore, the pressing force of the elastic body 133 acts on the inclined surface of the lower surface of the presser foot 135, and the presser foot 135 is rotated clockwise. Thereafter, the inner wall of the recess 131 presses the tapered portion 139T on the back of the presser piece 135, and the die 5 is pressed and fixed in the state shown in FIG.

When unclamping die 5, air passage 1
When the air is removed from 41 and the cylinder 127 is operated in the opposite direction, the piston rod 129 separates from the tapered portion 139T of the presser piece 135 at the same time as the piston rod 129 descends. Piece 13
5 is in a state where the die 5 is pressed. Then, when the piston rod 129 further descends, the elastic body 1
33 is removed and the presser piece 135 is lowered. At this time, in FIG. 5, the elastic body 133
Since the lower right end of the presser foot piece 135 is in contact with the upper surface of the presser foot piece 135, the presser foot piece 135 rotates counterclockwise and tilts, returning to the initial state.

That is, the presser piece 135 presses and fixes the die 5 by vertically moving and swinging. Therefore, by slightly moving the presser piece 135 up and down to move it into and out of the upper surface of the die holder 123 and to swing it, the die 5 can be pressed and fixed, and the piston rod 1 of the cylinder 127 can be pressed and fixed.
The stroke of 29 may be small, and the cylinder 127 can be made smaller. Also,
The area in which the presser foot 135 moves up and down and swings may be relatively small, and the overall structure can be made smaller.

〔effect〕

As can be understood from the above description of the embodiments, in short, the present invention is such that the punch 3 attached to the ram 7 is positioned below the ram 7 which is vertically movable on the frame 9 of the punch press 1. A die holder 123 for supporting the die 5 is provided, and the die 5 is provided on the upper surface of the die holder 123 so as to be horizontally removable.
3 and the die 5 to the abutment surface 123T.
A presser piece 135 for pressing and fixing the die 5 is provided on a pin 139 attached to the die holder 123 so as to be movable up and down, to be retractable from the upper surface of the die holder 123, and to be swingable in the direction of pressing the die 5. An elastic body 133 is interposed between the vertically movable piston rod 129 of the mounted cylinder 127 and the inclined lower surface of the presser piece 135, and the piston rod 129 also moves the presser piece 135 in the direction in which it presses the die 5. It is provided so that it can be pressed freely.

As is clear from the above configuration, in the present invention, the die 5 is attached to the abutment surface 123 of the die holder 123.
A presser piece 135 for press-fixing to T is provided on a pin 139 attached to the die holder 123 so as to be movable up and down, to be retractable from the upper surface of the die holder 123, and to be swingable in the direction of pressing the die 5. An elastic body 133 is interposed between the vertically movable piston rod 129 of the cylinder 127 for vertically moving the presser foot 135 and the inclined lower surface of the presser foot 135, and the piston rod 129 also moves the presser foot. 135 is provided so as to be able to be pressed in the direction in which the die 5 is pressed.

Therefore, according to the present invention, after the cylinder 127 is actuated to raise the piston rod 129 and the presser foot 135 in the recessed state is slightly protruded from the upper surface of the die holder 123, the elastic body 133
When compressed, the elastic body 133 presses the inclined lower surface of the presser foot 135, and the presser foot 135
is swung in the direction of pressing the die 5. and,
Thereafter, the piston rod 129 presses the presser piece 135, and the die 5 is firmly pressed and fixed.

That is, according to the present invention, the stroke of the piston rod 129 in the cylinder 127 can be reduced by providing the presser piece 135 so as to be vertically movable and swingable, thereby making it possible to downsize the cylinder 127. Furthermore, with the configuration in which the elastic body 133 is interposed between the inclined lower surface of the presser piece 135 and the piston rod 129, the die 50
The movement to the swinging movement for pressing can be performed smoothly, and the overall configuration can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a punch press to which the apparatus of the present invention is applied. FIG. 2 is a view taken along the arrows in FIG. 1, excluding the automatic mold exchange device. FIG. 3 is an enlarged cross-sectional view taken in the direction of arrows in FIG. 2. Fourth
The figure is a view taken along the arrow in FIG. FIG. 5 is an enlarged view of the section shown by the arrows in FIG. 4. Explanation of symbols representing main parts of the drawings: 1...Punch press, 3...Punch, 5...Die, 7...Ram, 25...Swan neck holder, 25D...Lower arm, 35...Carriage base, 47 ... Carriage, 123 ... Die holder, 125 ... Clamp device, 127 ... Cylinder, 129 ... Piston rod, 133 ... Elastic body, 135 ... Presser piece.

Claims (1)

[Scope of utility model registration request] A die holder 123 that supports the die 5 that corresponds to the punch 3 attached to the ram 7 is provided below the ram 7, which is provided on the frame 9 of the punch press 1 so as to be movable up and down. The die 5 is provided so as to be detachable in the horizontal direction, and an abutting surface 123T that can freely abut with the abutting surface of the die 5 is provided on the upper surface of the die holder 123, and the die 5 is press-fixed to the abutting surface 123T. A presser piece 135 is provided on a pin 139 attached to the die holder 123 so as to be movable up and down, to be able to appear and retract from the upper surface of the die holder 123, and to be swingable in the direction of pressing the die 5, so that the presser piece 135 can move up and down, and can freely swing in the direction of pressing the die 5. Freely movable piston rod 1
An elastic body 133 is interposed between 29 and the inclined lower surface of the presser piece 135, and the presser piece 135 is provided so that the piston rod 129 can freely press the presser piece 135 in the direction of pressing the die 5. A die support device in a punch press.