JP2016041432A - Punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch press for suppressing the vibration of a frame at a punching processing time, while sufficiently suppressing the vibration of a machine to accompany the positioning operation of a work-piece, so that the occurrence of noises and the transmission of vibrations to the foundation can be suppressed.SOLUTION: In a punch press 1 equipped with a portal frame 10 and a work positioning device 15, at portions excepting a portion directly below a punching work position, the portal frame 10 and a side guide arm 19 or a support member of the work positioning device 15 are fixed directly to a mounting floor face E, and a rubber damper 35 for absorbing the vibrations of the portal frame 10 is interposed between a lower frame 12 just below the punching work position and the mounting floor face E.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a punch press for punching a plate-like workpiece.

  In punch presses, when punching a workpiece, the lower frame and upper frame bend due to the punching load, and when the punching is completed, the punching load is released and the frame returns to its original state. This repetition causes the frame to vibrate. However, there is a problem that noise is generated due to the vibration or a large vibration is transmitted to the ground side.

  As a countermeasure, it can be considered to increase the rigidity of the frame. However, when the rigidity of the frame is increased, noise and vibration due to bending can be suppressed. However, there is another problem that the frame is enlarged to increase the installation space and cost.

  Therefore, conventionally, in order to reduce vibration of the frame and prevent transmission of vibration from the frame to the ground, an air spring device having a soft spring characteristic between the frame of the punch press and the installation floor, a damper or It has been proposed that a shock absorber or the like is installed and the entire punch press is supported via these so as to suppress vibrations and prevent transmission of vibrations to the ground.

  5 to 7 show a turret punch press described in Patent Document 1 and a support structure thereof.

  As shown in FIG. 5, the turret punch press 100 includes a gate-type frame 110 configured by an upper frame 111, a lower frame 112, and a side frame 113 that connects both sides of the upper frame 111 and the lower frame 112. have.

  An upper turret and a lower turret (not shown) are provided in the upper frame 111 and the lower frame 112 constituting the portal frame 110 so as to rotate in synchronization with each other, and a punch (not shown) is provided on the upper turret. An upper die (not shown) is attached, and a die (lower die not shown) is attached to the lower turret. Then, by punching the punch downward by a ram (not shown) provided on the upper frame 111, the workpiece is punched by the cooperation of the punch and the die.

  Further, the turret punch press 100 is provided with a fixed center table 122 constituting a work table adjacent to the upper turret and the lower turret. A movable side table 123 is provided on both sides of the center table 122. Further, a carriage base 131 constituting the workpiece positioning device 130 is movably provided across the center table 122, and the side table 123 is integrally connected to the carriage base 131, whereby the carriage base 131 and the side base The table 123 is movable together.

  A carriage 135 that is movable in a direction perpendicular to the direction of movement of the side table 123 is mounted on the carriage base 131, and a clamp device that can grip a side edge of a plate-like workpiece is mounted on the carriage 135. 136 is mounted so that its position can be adjusted.

  Further, as a means for supporting the side table 123, a sub guide arm 125 projects from the side surface of the lower frame 112 constituting the portal frame 110, and a guide rail 127 is provided on the sub guide arm 125. These guide rails 127 extend in the movement direction of the side table 123 and guide the movement of the side table 123.

  In the above configuration, the workpiece held by the clamping device 136 on the carriage 135 is moved and positioned with respect to the punching position by the movement of the carriage base 131 in the left-right direction and the movement of the carriage 135 in the front-rear direction. Punching into a desired shape is performed at that position.

  Moreover, this turret punch press 100 is installed on the installation floor E (ground etc.) as shown in FIG.6 and FIG.7.

  First, a base member 150 is integrally provided on the lower frame 112 constituting the portal frame 110, and a plurality of air spring devices 160 are interposed between the base member 150 and the installation floor E. The portal frame 110 is supported through the plurality of air spring devices 160. The air spring device 160 is, for example, a rubber bag filled with air, has a soft spring characteristic, and exhibits an anti-vibration effect against low-frequency vibrations.

  The sub guide arm 125 protruding from the side surface of the lower frame 112 to support the workpiece positioning device 130 and the side table 123 is supported on the installation floor E through a plurality of shock absorbers 170.

  When the turret punch press 100 is installed on the installation floor E, the lower frame 112 below the vertical line (machine center line) L passing through the punching position and the installation floor E is placed between the lower frame 112 and the installation floor E. A space S is secured so as not to restrict the bending of the frame 112.

  In the punch press 100 having the above configuration, the main part of the turret punch press 100 is supported via the air spring device 160 having a soft spring characteristic, so that the low frequency of the portal frame 110 generated at the time of punching is reduced. The vibration is absorbed by the air spring device 160. Therefore, transmission of vibration to the installation floor E can be prevented, and ground vibration can be reduced.

  Further, since the sub guide arm 125 that supports the workpiece positioning device 130 is supported via the shock absorber 170, the carriage base 131 and the carriage 135 of the workpiece positioning device 130 are moved back and forth, and left and right, and the workpiece is punched. The shaking or tilting of the machine that occurs when positioning is controlled.

Japanese Patent Laid-Open No. 10-43897

  By the way, when the workpiece is moved back and forth and left and right by the workpiece positioning device 130 described above, the center of gravity of the machine fluctuates. However, like the punch press 100 described in Patent Document 1, an air spring having soft spring characteristics. When the main part of the machine is supported by the device 160, the shaking of the entire machine due to the fluctuation of the center of gravity of the machine when the workpiece is positioned cannot be sufficiently suppressed, and the punching accuracy may be adversely affected. I understood that.

  In consideration of the above circumstances, the present invention suppresses the vibration of the frame during punching while sufficiently suppressing the vibration of the machine accompanying the workpiece positioning operation, thereby suppressing the generation of noise and the transmission of vibration to the ground. An object of the present invention is to provide a punch press that can be used.

  In order to solve the above problems, the invention of claim 1 is a frame comprising an upper frame that supports a punch, a lower frame that supports a die, and a side frame that connects both sides of the upper frame and the lower frame. In a punch press comprising a main body and a workpiece positioning device that moves and positions a workpiece in the front-rear and left-right directions with respect to a punching position where punching is performed by an up-and-down movement by the punch and the die. The frame body and the frame of the workpiece positioning device are directly fixed to the installation floor surface at a place other than the above, and the vibration of the frame body is absorbed between the lower frame and the installation floor surface immediately below the punching position. It is characterized by installing a damper.

  A second aspect of the present invention is the punch press according to the first aspect, wherein the damper is made of rubber sandwiched between the lower frame and the installation floor surface.

  According to the punch press of the first aspect of the present invention, since the vibration absorbing damper is installed between the lower frame and the installation floor surface immediately below the punching position where the bending of the frame body is the largest, the punching process is performed. Vibration can be suppressed while allowing the frame body to bend at the time. Therefore, it is possible to reduce the noise generated due to the vibration of the frame main body and the vibration transmitted from the frame main body to the ground. Since the damper is not for receiving a load, the punching load is distributed to the lower frame and the upper frame as usual. For example, if the lower frame directly under the punching position is fixed directly to the installation floor, the vibration of the lower frame can be suppressed, but the punching load must be supported by the upper frame. It is necessary to increase the size. Further, since bending occurs only in the upper frame, there is a concern about misalignment between the punch and the die. However, when the damper is installed between the lower frame and the installation floor just below the punching position as in the present invention, the punch and die are misaligned while eliminating the need for a large frame body. Concerns can be eliminated. In addition, the frame body and the frame of the workpiece positioning device are directly fixed to the installation floor surface at locations other than directly under the punching position, so that the entire machine shakes due to changes in the machine center of gravity due to the operation of the workpiece positioning device. This can be sufficiently suppressed, and the punching accuracy of the workpiece can be improved.

  According to the punch press of the invention of claim 2, since the damper is made of rubber, it can be easily installed.

It is a front view of the turret punch press of the embodiment of the present invention. It is a side view of the turret punch press. It is a side view which shows the example of attachment structure of the damper used for support of the same turret punch press. It is a figure which shows the difference in the method of the vibration attenuation of a turret punch press with the case where the said damper is installed (a), and the case where it does not install (b). It is a perspective view which shows the external appearance structure of the conventional turret punch press. It is a front view which shows the support structure of the same turret punch press. It is a side view which shows the support structure of the same turret punch press.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view of a turret punch press according to an embodiment, and FIG. 2 is a side view.

  As shown in FIG. 1, the turret punch press 1 has a portal frame (frame body) 10. The portal frame 10 includes an upper frame 11, a lower frame 12, and side frames 13 and 14 that connect the left and right sides of the upper frame 11 and the lower frame 12.

  An upper turret 51 and a lower turret 52 are provided in the upper frame 11 and the lower frame 12 constituting the portal frame 10 so as to rotate in synchronization with each other, and a punch 53 is attached to the upper turret 51. A die 54 is attached to the lower turret 52. The punch 53 is struck downward by a ram (not shown) provided on the upper frame 11 so that the workpiece is punched by the cooperation of the punch 53 and the die 54.

  In addition, the turret punch press 1 is provided with a fixed center table 24 constituting a work table and movable side tables 25 on both sides of the work table. A workpiece positioning device 15 for moving and positioning is provided. Here, the vertical line passing through the punching position is the machine center line L of the turret punch press 1.

  As shown in FIGS. 1 and 2, the workpiece positioning device 15 extends in the front-rear direction (direction penetrating the portal frame 10) of the turret punch press 1 and in the left-right direction (arrow X direction in FIG. 1). A long carriage base 16 that is movable, and a carriage 17 that is mounted on the carriage base 16 and is movable in the longitudinal direction of the carriage base 16, that is, in the front-rear direction of the turret punch press 1 (in the direction of arrow Y in FIG. 2). And a clamping device 18 that is mounted on the carriage 17 so as to be adjustable in position and can grip the side edge of the plate-like workpiece. The carriage base 16 is disposed so as to straddle the center table 24, and the side table 25 is integrally connected to the carriage base 16 so that the carriage base 16 and the side table 25 can move integrally. It has become.

  Sub-guide arms 19 that are support members for the workpiece positioning device 15 and the sub-table 25 are disposed on both sides of the lower frame 12 in the front-rear direction, and the movement of the side table 25 is guided on the sub-guide arms 19. A guide rail 20 is provided.

  In the above configuration, the workpiece gripped by the clamping device 18 on the carriage 17 is moved and positioned with respect to the punching position by the movement of the carriage base 16 in the left-right direction and the movement of the carriage 17 in the front-rear direction. Punching into a desired shape is performed at that position.

  Further, a base plate 31 is attached to the lower frame 12 of the turret punch press 1 via a base bracket 32 at positions away from the machine center line L in the left-right direction and the front-rear direction (a place other than directly below the punching position). The four base plates 31 are directly fixed to the installation floor E so that the portal frame 10 is supported on the installation floor E. The sub guide arm 19 is also supported on the installation floor surface E by the base plate 28 at the lower end of each support leg 27 being directly fixed to the installation floor surface E.

  Further, immediately below the punching position (on the machine center line L), a damper 35 that absorbs vibration of the portal frame 10 is installed between the lower surface of the lower frame 12 and the installation floor surface E. For example, as shown in FIG. 3, the damper 35 is sandwiched between a flange 37 secured to the lower surface of the lower frame 12 with a bolt 40 and a flange 38 secured to the installation floor E with an anchor bolt 41. It is made of rubber having a cylindrical shape or a prismatic shape. Thus, when a simple rubber is used as the damper 35, it can be easily installed.

  According to the turret punch press 1 configured as described above, the vibration absorbing damper 35 is provided between the lower frame 12 and the installation floor E immediately below the punching position where the gate frame 10 is most bent. Since it is installed, vibration can be suppressed while allowing the portal frame 10 to bend during punching. Therefore, it is possible to reduce the noise generated with the vibration of the portal frame 10 and the vibration transmitted from the portal frame 10 to the ground (installation floor E).

  FIG. 4 shows the difference in the vibration damping method of the turret punch press when the damper 35 is installed (a) and when it is not installed (b). As shown in FIG. 3, by installing the damper 35, vibration can be effectively suppressed.

  Since the damper 35 in this case is not provided for receiving a load, the punching load is distributed to the lower frame 12 and the upper frame 11 as usual.

  For example, if the lower frame 12 immediately below the punching position is fixed directly to the installation floor E, vibration of the lower frame 12 can be suppressed, but the punching load must be supported by the upper frame 11. Therefore, it is necessary to enlarge the portal frame 10. Further, since bending occurs only in the upper frame 11, there is a concern that the punch 53 and the die 54 may be misaligned.

  In this regard, when the damper 35 is installed between the lower frame 12 and the installation floor E immediately under the punching position as in the turret punch press 1 of the above embodiment, it is necessary to increase the size of the portal frame 10. The possibility of misalignment of the punch 53 and the die 54 can be eliminated while eliminating the property.

  In addition, the support member (side guide arm 19) of the portal frame 10 and the workpiece positioning device 15 is directly fixed to the installation floor E at locations other than directly under the punching processing position. It is possible to sufficiently suppress the shaking of the entire machine due to the change in the position of the center of gravity of the machine, and it is possible to improve the workpiece punching accuracy.

1 Punch press 10 Gate frame (frame body)
DESCRIPTION OF SYMBOLS 11 Upper frame 12 Lower frame 13, 14 Side frame 15 Work positioning device 19 Side guide arm (support member of workpiece positioning device)
35 Damper 53 Punch 54 Die L Machine center line (Punching position)

Claims (2)

A frame main body comprising: an upper frame that supports the punch; a lower frame that supports the die; and a side frame that connects both sides of the upper frame and the lower frame;
In a punch press provided with a workpiece positioning device that moves and positions a workpiece in the front-rear and left-right directions with respect to a punching processing position where punching processing is performed by vertical movement by the punch and die,
At the place except directly under the punching position, the frame body and the support member of the work positioning device are directly fixed to the installation floor surface,
A punch press characterized in that a damper that absorbs vibrations of the frame main body is installed between the lower frame and the installation floor just below the punching position. The punch press according to claim 1,
The punch press characterized in that the damper is made of rubber sandwiched between the lower frame and the installation floor surface.

Images