JP2007054846A - Punch press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a punch press in which a mechanism for transmitting the rotation of a driving motor to tools is simplified and deducing, rotating plurality of tools is made possible with a small number of the driving motors. <P>SOLUTION: This punch press is provided with a ram 10 liftably provided in an upper frame part 1a freely and the upper and lower tool supporting bodies 2, 3. The upper and lower tool supporting bodies on which a plurality of punch tools 4 and die tools 5 which are freely rotatable on their axes can be mounted, which are respectively provided freely movably on the upper frame part and the lower frame part 1b and with which the punch tool and die tool are positioned on the lifting axial line O. The driving motors 26, 36 for rotating the punching tool 4 and the die tool 5 on their axes are respectively arranged on the lifting axial line O of the ram of the upper frame part and the lower frame part. Power transmission devices 27, 37 are provided and the rotor 26A, 36A of each driving motor, the punch tool and the die tool are connected so as to be respectively switchable to the connected state and the disconnected state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a punch press provided with a punch tool and a die tool that can rotate freely, such as an index tool or a multi-tool.

  In a punch press having an auto index tool function that determines the direction of a tool by rotating the tool, for example, a tool supported to rotate freely on a turret is rotated by a predetermined drive mechanism to be indexed in a predetermined rotation direction. . When the tool is, for example, a punch tool having a rectangular cross section, the direction of the rectangular cross section is set to a predetermined rotation direction by the indexing operation. Further, in the case of a multi-tool system in which a tool holder is rotatably supported by a turret and a plurality of tools are supported at positions offset from the rotation center of the tool holder, the tool holder is rotated by the drive mechanism. The desired tool on the tool holder is indexed to a predetermined rotational position.

2. Description of the Related Art Conventionally, as a drive mechanism for the auto index tool function, one that transmits rotation of a rotary drive shaft or belt driven by a motor to a tool on a turret via a coupling mechanism is known (for example, Patent Documents 1 and 2).
There has also been proposed a device in which a direct drive motor is individually provided corresponding to each tool on the turret, and each tool is individually indexed and rotated by the corresponding direct drive motor (for example, Patent Document 3).
Japanese Utility Model Publication No. 6-44493 Japanese Patent No. 3284715 Japanese Patent No. 3638721

However, in the configurations disclosed in Patent Documents 1 and 2, the rotation of the rotary drive shaft and the belt is converted into the rotation of the tool using a gear such as a flat gear or a worm wheel, so that the gear is required to ensure indexing accuracy. Minimize backlash in between. For this reason, there is a problem that high component accuracy and assembly accuracy are required, which not only increases costs, but also complicates the structure, and there is a limit to speeding up the drive mechanism.
In the configuration disclosed in Patent Document 3, the drive transmission system can be simplified, but it is necessary to provide an expensive direct drive motor as many as the number of freely rotatable tools on the turret. Further, it is necessary to control each motor individually. For these reasons, there is a problem that the cost increases. In addition, the drive motor provided on the turret is disadvantageous to the motor life because it receives a greater force with respect to vibration acceleration generated during punching than when provided on the frame side.

An object of the present invention is to provide a punch press that simplifies a mechanism for transmitting the rotation of a drive motor to a tool and can index and rotate a plurality of tools with a small number of drive motors.
Another object of the present invention is to enable rotational driving at a position closer to the punch tool.
Still another object of the present invention is to further simplify the configuration.

The punch press according to the present invention can be equipped with a press frame having an upper frame part and a lower frame part, a ram provided to be movable up and down on the upper frame part, and a plurality of freely rotatable punch tools and die tools. And an upper and lower tool support for positioning the punch tool and the die tool on the raising / lowering axis of the ram, respectively, which are movably provided on the frame part and the lower frame part, respectively. A drive motor for rotating the punch tool and the die tool is arranged on the line, and the rotor of the drive motor and the punch tool and the die tool are connected to each other so as to be switchable between a connected state and a disconnected state. And a power transmission mechanism.
According to this configuration, the drive motors for rotating the punch tool and the die tool are respectively arranged on the raising and lowering axes of the rams of the upper frame part and the lower frame part, and the rotor of each of the drive motors, the punch tool and the die tool are arranged. Since a power transmission mechanism is provided that can be switched between a connected state and a disconnected state, the power transmission mechanism from the drive motor to the punch tool and the die tool is simplified, and a plurality of tools are rotated with a small number of drive motors. be able to.

  In this invention, the drive motor provided in the upper frame part may be provided around the guide part of the ram that moves up and down. When the drive motor is provided around the guide portion of the ram as described above, the rotation drive can be performed at a position closer to the punch tool. Therefore, it is possible to further increase the speed and simplify the configuration.

  In the present invention, the power transmission mechanism may be provided in an upper frame part and a lower frame part, respectively. When the power transmission mechanism is provided in the upper frame part and the lower frame part, it is only necessary to provide one power transmission mechanism on each of the punch tool side and the die tool side, and the configuration can be further simplified.

The punch press according to the present invention can be equipped with a press frame having an upper frame part and a lower frame part, a ram provided to be movable up and down on the upper frame part, and a plurality of freely rotatable punch tools and die tools. And an upper and lower tool support for positioning the punch tool and the die tool on the raising / lowering axis of the ram, respectively, which are movably provided on the frame part and the lower frame part, respectively. A drive motor for rotating the punch tool and the die tool is arranged on the line, and the rotor of the drive motor and the punch tool and the die tool are connected to each other so as to be switchable between a connected state and a disconnected state. Since the power transmission mechanism is provided, the mechanism for transmitting the rotation of the drive motor to the tool is simplified and the number of drive motors is reduced. You can rotate indexing the number of tools.
When the drive motor provided on the upper frame is provided around the guide part of the ram that moves up and down, it can be driven to rotate at a position closer to the punch tool, further increasing the speed and simplifying the configuration. Can be realized.
When the power transmission mechanisms are provided in the upper frame portion and the lower frame portion, respectively, the configuration can be further simplified.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a schematic configuration of the punch press of this embodiment, and FIG. 2 is a side view thereof. In this punch press, upper and lower turrets 2 and 3 as tool supports are supported on the upper frame portion 1a and the lower frame portion 1b of the press frame 1 so as to be rotatable around concentric vertical axes. A plurality of punch tools 4 and die tools 5 are arranged in the circumferential direction on the upper and lower turrets 2 and 3. Any one of the plurality of punch tools 4 and die tools 5 is rotatable.

  These self-rotating punch tool 4 and die tool 5 are configured as shown in FIG. As shown in the figure, the punch tool 4 includes a cylindrical punch holder 4b and a punch 4a that is supported in the punch holder 4b so as not to rotate. A cylindrical member is formed in the tool support hole 2a of the upper turret 2. 6 is supported so as to rotate freely. The cylindrical member 6 is a member in which the punch holder 4b can be moved up and down and is relatively non-rotatably fitted. The cylindrical member 6 is rotatable in the tool support hole 2a of the upper turret 2 via a liner 48. Supported. The die tool 5 includes a cylindrical die holder 8 and a die 9 that is supported in the die holder 8 so as not to rotate. The die tool 5 is supported by the tool support hole 3a of the lower turret 3 so as to be rotatable. In the example of the figure, the punch holder 4b and the die holder 8 are fitted into the tool support holes 2a and 3a via the liners 48 and 49, respectively. 8 may be fitted.

  The punch tool 4 is driven up and down by the ram 10 while being indexed to the punch position P. The punch position P is a position on the lifting axis O of the ram 10. The head of the punch tool 4 is a T-shaped connecting portion 7 that is connected to the ram 10 when the punch tool 4 is indexed at the punch position P. The ram 10 is supported by the upper frame part 1a through a guide part 19 provided in the upper frame part 1a so as to be movable up and down, and is driven up and down by a punching means 11 shown in FIG. The punching means 11 is a processing means for punching the plate material W. The punching means 11 includes a servo motor 12 and a motion conversion mechanism 13 that converts its rotation into a linear motion.

  The upper and lower turrets 2 and 3 are rotationally driven by a turret driving means (not shown) installed in the press frame 1, and a desired tool is indexed to the punch position P. The turret driving means rotates the upper and lower turrets 2 and 3 synchronously with each other via a drive transmission system such as a chain by, for example, a common motor or individual motors (both not shown).

  The plate material feeding mechanism 14 is means for feeding an arbitrary portion of the plate material W placed on the table 15 to the punch position P. In this plate material feeding mechanism 14, a cross slide 17 that moves left and right (X direction) is installed on a carriage 16 that moves back and forth (Y direction), and a work holder 18 that holds an end of the plate material W is attached to the cross slide 17. As a thing.

FIG. 3 is a longitudinal sectional view of the tool indexing mechanisms 24 and 25 that rotate the punch tool 4 and the die tool 5 attached to the upper and lower turrets 2 and 3 at the punch position P and index them in a predetermined rotation direction. Show.
The punch tool indexing mechanism 24 is provided around the ram 10 so that the drive motor 26 that rotates the punch tool 4 and the rotor 26A of the drive motor 26 and the punch tool 4 can be switched between a connected state and a disconnected state. It consists of the power transmission mechanism 27 to be connected. The guide portion 19 is provided with a stator 26 </ b> B of the drive motor 26.
The die tool indexing mechanism 25 is provided concentrically with the raising / lowering axis O of the ram 10 in the lower frame portion 1b immediately below the lower turret 3 at the punch position P, and a drive motor 36 for rotating the die tool 5. The power transmission mechanism 37 connects the rotor 36A of the motor 36 and the die tool 5 so as to be switchable between a connected state and a disconnected state.

  FIG. 4 shows an enlarged cross-sectional view of the punch tool indexing mechanism 24. A drive motor 26 of the punch tool indexing mechanism 24 includes a rotor 26A provided concentrically with the raising / lowering axis O of the ram 10 via the bearing 20 so as to be rotatable on the guide portion 19, and a guide portion surrounding the rotor 26A. 19 and a stator 26B fixed to 19. The stator 26B is composed of a stator coil or the like, and the rotor 26A is composed of a permanent magnet or the like.

  The power transmission mechanism 27 of the punch tool indexing mechanism 24 includes an engagement pin 28 that penetrates the rotor 26A of the drive motor 26 so as to be movable up and down, and an engagement pin drive means 29 that drives the engagement pin 28 up and down. The engagement pin 28 is detachably engageable with an engagement groove 6 a at the upper end of the cylindrical member 6 fitted so as to be rotatable integrally with the punch tool 4 on the outer periphery of the punch tool 4. The engagement pin driving means 29 is composed of a cylinder device provided at the upper end of the guide portion 19, and the upper end of the engagement pin 28 engages with an engagement pin support member 31 provided at the lower end of the piston rod 30.

  The engagement pin support member 31 is guided by a guide hole 32 penetrating up and down the guide portion 19 and can be moved up and down, and has a T-shaped cross section with which a guide roller 33 provided at the upper end of the engagement pin 28 is engaged. A groove 34A is provided. Further, the guide portion 19 is provided with a groove portion 34B having the same cross-sectional shape as the groove portion 34A of the engagement pin support member 31 in an annular shape concentric with the lifting axis O of the ram 10. The groove 34 </ b> B is interrupted at the location where the guide hole 32 is formed, and both ends open to the guide hole 32. The groove 34B is engaged in the state shown in FIG. 4 in which the engagement pin driving means 29 is lowered to a height at which the engagement pin 28 is engaged with the engagement groove 6a of the cylindrical member 6 that supports the punch tool 4. The mating pin support member 31 is provided at a height facing the groove portion 34 </ b> A.

  4, when the rotor 26A of the drive motor 26 rotates, the guide roller 33 at the upper end of the engagement pin 28 is transferred from the groove portion 34A of the engagement pin support member 31 to the groove portion 34B of the guide portion 19. Thus, the rotation of the rotor 26A is allowed. The rotational position of the rotor 26A where the guide roller 33 of the engagement pin 28 engages with the groove 34A of the engagement pin support member 31 is the origin of the rotor 26A.

  The engagement pin drive means 29 is provided with a connection detection means 46 for detecting the connection state and the connection release state of the drive motor rotor 26A and the punch tool 4. This connection detection means 46 is arranged from the upper end of the engagement pin drive means 29 in accordance with the state in which the engagement pin 28 is retracted from the engagement groove 6a in the cylindrical member 6 around the punch tool 4 and the engaged state. It consists of a proximity switch that detects the upper end of the piston rod 30 that appears and disappears.

  FIG. 5 shows an enlarged cross-sectional view of the die tool indexing mechanism 25. In the lower frame portion 1b below the lower turret 3, a cylindrical support member 22 that supports the die tool indexing mechanism 25 is concentric with the lifting axis O of the ram 10, that is, the lower turret indexed at the punch position P. 3 to be concentric with the die tool 5. The drive motor 36 of the die tool indexing mechanism 25 includes a rotor 36A that is concentric with the lifting axis O of the ram 10 and rotatably supported on the support member 22 via a bearing 21, and the support so as to surround the rotor 36A. It consists of a stator 36B fixed to the member 22. The stator 36B is composed of a stator coil or the like, and the rotor 36A is composed of a permanent magnet or the like.

The power transmission mechanism 37 of the die tool indexing mechanism 25 includes an engagement pin 38 that penetrates the rotor 36A of the drive motor 36 so as to be movable up and down and can be engaged with and disengaged from the engagement groove 5a at the lower end of the die tool 5. Engagement pin driving means 39 for driving the pin 38 up and down is provided.
The engagement pin drive means 39 is composed of a cylinder device provided at the side of the support member 22, and the lower end of the engagement pin 38 engages with the engagement pin support member 41 provided at the lower end of the piston rod 40. . The engagement pin support member 41 is guided by a guide rod 42 provided perpendicular to the support member 22 and can be moved up and down, and a U-shaped cross section with which a guide roller 43 provided at the lower end of the engagement pin 38 is engaged. 44A. The support member 22 is provided with a groove 44B having the same cross-sectional shape as the groove 44A of the engagement pin support member 41 in an annular shape concentric with the lifting axis O of the ram 10. The groove 44B is formed with the groove 44A of the engagement pin support member 41 in the state shown in FIG. 5 in which the engagement pin driving means 39 raises the engagement pin 38 to a height at which the engagement pin 38 is engaged with the engagement groove 5a of the die tool 5. It is provided at the opposite height. The support member 22 is notched at a certain circumferential position of the engagement pin support member 41, and the support member 22 is located in the notch, and the groove 44B is cut off at the notch and both ends of the notch are at the notch. It is open.

  5, when the rotor 36A of the drive motor 36 rotates, the guide roller 43 at the lower end of the engagement pin 38 is transferred from the groove 44A of the engagement pin support member 41 to the groove 44B of the support member 22. Thus, the rotation of the rotor 36A is allowed. The rotational position of the rotor 36A where the guide roller 43 of the engagement pin 38 engages with the groove 44A of the engagement pin support member 41 is the origin of the rotor 36A.

  In the vicinity of the engagement pin drive means 39, connection detection means 47 for detecting the connection state and connection release state of the drive motor rotor 36A and the die tool 5 is provided. The connection detecting means 47 detects one end of the engaging pin support member 41 that moves up and down in accordance with the state in which the engaging pin 38 is engaged with the engaging groove 5a of the die tool 5 and the disengaged state. It consists of a proximity switch.

  The entire punch press is controlled by a control device 45 (FIGS. 2 and 3) comprising a computer-type numerical control device and the like, and the drive motors 26 and 36 of the tool indexing mechanisms 24 and 25 are also controlled by the control device. 45.

  Next, the tool indexing operation in the punch press will be described. When the desired punch tool 4 and die tool 5 that can freely rotate are indexed to the punch position P by the synchronous rotation of the upper and lower turrets 2 and 3, the T-shaped connecting portion of the punch holder 4 b in the punch tool 4 is connected to the ram 10. Is done. At this time, the rotor 26A of the drive motor 26 in the punch tool indexing mechanism 24 and the rotor 36A of the drive motor 36 in the die tool indexing mechanism 25 are at the origin described above. Further, the engagement pins 28 and 38 of the punch tool indexing mechanism 24 and the die tool indexing mechanism 25 are engaged with the cylindrical member 6 on the outer periphery of the punch tool 4 as indicated by phantom lines in FIGS. The groove 6a and the die tool 5 are in a position away from the engagement groove 5a.

  From this state, the engagement pin driving means 29 and 39 are operated, the engagement pin 28 is engaged with the engagement groove 6a of the punch tool 4, and the engagement pin 38 is engaged with the engagement groove 5a of the die tool 5. Match. Along with this, in the punch tool indexing mechanism 24, the groove portion 34 </ b> A of the engagement pin support member 31 is aligned with the groove portion 34 </ b> B of the guide portion 19. Further, in the die tool indexing mechanism 25, the groove 44A of the engagement pin support member 41 is aligned with the groove 44B of the support member 22.

  Next, a drive command is given from the control device 45 to the drive motors 26 and 36, and the rotors 26A and 36A rotate by a predetermined angle. The rotation is permitted when the guide rollers 33 and 43 of the engagement pins 28 and 38 are transferred to the grooves 34B and 44B. Thereby, the punch tool 4 and the die tool 5 are rotated and positioned by a predetermined angle. As shown in FIG. 6 showing a schematic bottom view of the punch tool 4, the punch 4 a is set by changing the direction of the rotation axis about the raising / lowering axis O of the ram 10 by the rotation index. The release of the rotation index of the tool is performed by the reverse procedure of the above operation.

  According to the punch press of this configuration, the drive motor 26 for rotating the punch tool 4 and the die tool 5 on the lifting axis O of the ram 10 of the upper frame portion 1a and the lower frame portion 1b of the punch plate 1 as described above. , 36 are provided, and power transmission mechanisms 27, 37 are provided to connect the rotors 26A, 36A of the drive motors 26, 36 to the punch tool 4 and the die tool 5 in a switchable state and a disconnected state, respectively. ing. Therefore, a plurality of tools (punch tool 4 and die tool 5) can be rotated with a small number of drive motors while simplifying the power transmission mechanisms 27 and 37 from the drive motors 26 and 36 to the punch tool 4 and the die tool 5. .

Further, since the drive motor 26 of the punch tool indexing mechanism 24 provided in the upper frame portion 1a is provided around the ram 10 that moves up and down, the drive motor 26 can be rotationally driven at a position closer to the punch tool 4.
Further, since the power transmission mechanisms 27 and 37 of the punch tool indexing mechanism 24 and the die tool indexing mechanism 34 are provided in the upper frame part 1a and the lower frame part 1b of the punch plate 1, respectively, the configuration is further simplified. Can be

It is a top view which shows schematic structure of the punch press which concerns on one Embodiment of this invention. It is a side view which shows schematic structure of the punch press. It is sectional drawing of the tool indexing mechanism in the punch press. It is an expanded sectional view of a punch tool indexing mechanism. It is an expanded sectional view of a die tool indexing mechanism. It is explanatory drawing of the indexing rotation of a punch tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Press frame 1a ... Upper frame part 1b ... Lower frame part 2 ... Upper turret 3 ... Lower turret 4 ... Punch tool 5 ... Die tool 10 ... Ram 19 ... Guide part 26 ... Drive motor 26A ... Rotor 27 ... Power transmission mechanism 36 ... Drive motor 36A ... Rotor 37 ... Power transmission mechanism

Claims (3)

A plurality of press frames having an upper frame portion and a lower frame portion, a ram provided to be movable up and down on the upper frame portion, and a plurality of freely rotatable punch tools and die tools can be mounted on the upper frame portion and the lower frame portion. An upper and lower tool support each provided movably to position the punch tool and the die tool on the lifting axis of the ram,
Drive motors for rotating the punch tool and the die tool are respectively arranged on the raising and lowering axis lines of the rams of the upper frame part and the lower frame part, and the rotor of each drive motor and the punch tool and the die tool are respectively set. A punch press provided with a power transmission mechanism for switching between a connected state and a disconnected state.   The punch press according to claim 1, wherein the drive motor provided in the upper frame portion is provided around a guide portion of a ram that moves up and down.   The punch press according to claim 1 or 2, wherein the power transmission mechanism is provided in an upper frame portion and a lower frame portion, respectively.

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