JPH0242287B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a tool holder in a punch press machine.

[Conventional technology]

For example, Japanese Patent Laid-Open No. 58-53333 discloses that in a punch press machine, the molds for punches, die tools, etc. are rotated together with the tool holder, and even a pair of molds can perform various punches at different angles. It is known in

However, in the device disclosed in the above-mentioned publication, a passive shaft serving as one of the engaging members of the clutch must be provided upright on the turret, and an interlocking shaft must also be provided to connect the passive shaft and the mold holder. for,
In other words, since an extra drive transmission device must be installed around the mold holder, if you want to rotate all the mold holders on the turret, you cannot use the conventional small diameter turret. If this is not possible and the turret diameter has to be made larger than necessary, or if the turret diameter becomes larger and the number of drive transmission devices installed increases, the rotational inertia of the turret will inevitably increase and the indexing There are also drawbacks such as a lack of speed during rotation and an increase in cost.

The above situation is almost the same for punch press machines other than the turret type.

Therefore, it is conceivable to create a mechanism in which the drive transmission device such as the interlocking shaft or worm gear around the tool holder is omitted as much as possible, and the engagement member for rotational drive is directly connected to and removed from the tool holder from the outside. In this case, the tool holder is in a completely free state during the period when the rotational drive engagement member is not engaged with the tool holder, and therefore a new selective rotation stopper device is required for the tool holder. (In the device disclosed in the above publication, the worm gear also has the function of preventing rotation.) In other words, when the tool holder is held at a position where it engages with the engaging member, it is rotatable, and when it is not at that position, the turret is not rotated. Alternatively, the tool holder needs to be securely (non-rotatably) fixed to a base that supports the tool holder, such as a frame, but such a selective rotation prevention device has been newly added around each holder. In the end, the same drawbacks as those mentioned above will occur. Moreover, a new drawback arises in that a new control for the rotation prevention device is required.

[Problem that the invention seeks to solve]

This invention was developed in view of the above circumstances, and allows the rotation prevention device to be made as small as possible, and its on/off operation is automatically performed by fitting and disengaging the engaging member. A new tool holder that can easily (without creating any new drawbacks) realize a new punch press machine in which the engaging member for rotational drive is directly connected to and removed from the tool holder from the outside as described above. This is what we are trying to provide.

[Means for solving problems]

The tool holder according to the present invention, which solves the above problems, is rotatably provided on a support base such as a frame or a turret, and has a groove formed on its outer periphery into which an engaging member for rotational driving is fitted. A cam piece is provided at the bottom of the tool holder, and the width of the displacement of the cam piece is the width extending from the inside of the tool holder to the support base of the holder such as the frame or turret. In addition, a locking groove into which the cam piece can enter is formed in the support base, so that the cam piece serves as a rotation stopper for the tool holder.

〔Example〕

Hereinafter, based on the drawings, a tool holder according to the present invention will be described in which the engagement member for rotational driving is a punch tool,
An embodiment will be described in which the present invention is applied to a turret punch press machine in which the tool is rotated by being directly fitted into and removed from the tool holders of both die tools.

In FIG. 1, reference numerals 1 and 2 are upper and lower frames of the main body, respectively. An upper turret 3 is rotatably supported on the upper frame 1, and a lower turret 4 is similarly rotatably supported on the lower frame 2. The turrets 3 and 4 are rotated synchronously by a known drive mechanism (not shown), and the upper turret 3 has a punch tool 5, and the lower turret 4 has a die tool 6, which will be described in detail later. It is supported via tool holders 7 and 8.

9 is a ram provided through the upper frame 1 so as to be movable up and down; 11 is a pit man connected to the ram 9; when the crankshaft 12 connected to the top of the pit man 11 is driven to rotate, the ram 9 is driven up and down. , a C-shaped engagement groove 13 formed in the lower part of the ram 9.
There is a knob-shaped flange portion 5a on the upper part of the punch tool 5 inside.
When the punch tool 5 is inserted, the punch tool 5 moves up and down to perform punching.

The engagement groove 13 at the bottom of the ram 9 extends in the circumferential direction of the turret 3 (in the direction penetrating the plane of the paper in FIG. 2), and when the ram 9 is stationary and the turret 3 rotates, the punch tool The flange portion 5a of the punch tool 5 freely moves back and forth in the engagement groove 13, but when the turret 3 is stationary and the ram 9 moves up and down, the flange portion 5a of the punch tool 5 moves into the inward claw of the engagement groove 13. The punch tool 5 is engaged with the ram 9 and moves up and down together with the ram 9.

The tool holders 7 and 8 are rotatable relative to the turrets 3 and 4, respectively, and are rotatable about the vertical movement axis (punching axis) P of the ram 9, and are connected to the upper and lower frames 1, The first and second rotating members 14 and 15, which will be described in detail below, are provided in
The clutch is directly connected to the rotary shaft, thereby being rotationally driven.

Note that the rotating members 14 on the upper and lower frames 1 and 2,
15, the drive input to the gear part 14 is formed on the outer periphery of each rotating member 14, 15, as shown in the first diagram.
Worm gears 16 and 17 that mesh with a and 15a,
A toothed pulley 2 is attached to the worm gear shafts 18 and 19.
By connecting a servo motor 29 to the upper and lower transmission shafts 24 and 25, which are connected via toothed belts 26 and 22 and a toothed belt 23, a servo motor 29 is connected via toothed pulleys 26 and 27 and a toothed belt 28. In this embodiment, the transmission shaft 24,
25 are connected to each other via the toothed pulleys 31, 32 and the toothed belt 33, the servo motor 29 only needs to be provided on one transmission shaft 25 side, and the upper and lower transmission shafts 24, 25 are connected to each other. Although the rotational speeds of the two transmission shafts 24 and 25 are necessarily matched, servo motors may be connected to the upper and lower transmission shafts 24 and 25 individually.

Further, the origin of the rotation speed of the servo motor 29 in this embodiment is set at the time when a dog (not shown) provided on the tool holder 7 of the punch tool 5 is detected by a proximity switch (not shown) on the upper frame 1. However, the tool holder 8 on the die side may be used as a reference. If the servo motors are provided separately for the upper and lower parts as described above, the tool holders 7 and 8 of each tool may be used as a reference. You may also set the origin.

34 is a coupling, and 35 is a bearing bracket.

Below, the upper and lower tool holders 7, 8 and the first,
The second rotating members 14 and 15 will be explained in order.

That is, first, the tool holder 7 of the punch tool and the first rotating member 14 that engages with the holder 7
To explain this, as shown in FIGS. 2 and 3, the tool holder 7 of this embodiment is a cylindrical body with an upper flange 7a rotatably mounted inside a support tube 36 fixed to the upper turret 3. An engaging member 38 that is connected to the punch tool 5 is prevented from rotating by a vertical key (not shown), and is always urged downward by a spring 37 provided on the side of the bunch tool 5 itself. The holder 7 is prevented from falling by engaging with a vertical slit 39 formed on the inner surface thereof.

Therefore, the punch tool 5 and the tool holder 7 cannot rotate relative to each other at all times, and are vertically movable, but the upper flange A cam lever 41 provided in the portion 7a as described below allows the rotatable state or the non-rotatable state to be selectively established.

That is, the support shaft 42 is attached to the upper flange portion 7a.
A roughly G-shaped cam lever 41 that rotates around the
A spring 43 presses against one end of the cam lever 41.
A biased working pin 44 is provided, and the cam lever 41 is normally pushed by the working pin 44 so that the back surface 41a of the cam lever itself is pushed against the support cylinder 36.
The head of the cam lever 41 is pushed downward by an engaging pin 46, which will be described later, extending from the rotating member 14, and the cam lever 41 is rotated. However, when the back surface of the tool holder 7 is removed from the groove 45, the tool holder 7 becomes freely rotatable relative to the support cylinder 36, that is, relative to the upper turret 3 (FIG. 3). In addition, the cam lever 41
are provided at two opposing locations on the tool holder 7, and include a flange portion 7a into which the engagement pin 46 enters.
A wedge-shaped groove 47 is formed to match the shape of the tip of the engagement pin 46.

Next, as shown in FIG. 2, the first rotating member 14 is a cylindrical body rotatably mounted around a sleeve portion 1a that supports the ram 9 of the upper frame in a vertically movable manner. As mentioned above, the gear part 14a is formed on the outer periphery, and is driven to rotate at any angle by the rotation of the meshed worm gear 16.The following fluid cylinder 48 is provided inside to rotate the rotating member 14. two engaging pins 4 downward from
6 can be protruded freely.

That is, a fluid chamber 51 in which the piston 49 can freely move up and down is formed at two locations facing each other in the first rotating member 14 , and upper and lower ports 52 and 53 of the fluid chamber 51 are connected to the rotating member 14 . The piston 49 is formed in an annular groove along the entire inner circumference of the piston 49 so that the piston 49 can be freely moved up and down by external fluid control. It is fixed in one piece.

Further, another pin 5 is provided on the upper surface of the piston 49.
4 are fixed together, and the piston 49 is connected to the second piston 49.
When the rotary member 14 moves up and down in the illustrated rotational position, the upper end of this pin 54 moves up and down the sensor rod 55 that is hanging downward in the hole 1b bored in the upper frame 1.
By detecting the upper end of the engagement pin 46 with two proximity sensors 56 and 57, it is possible to detect whether the engagement pin 46 is protruding or retracted.

58 is a guide frame of the sensor rod 55, 55a is a flange formed in the middle of the sensor rod 55,
Reference numeral 59 denotes a spring that is interposed in the rod on the flange portion 55a and always urges the sensor rod 55 downward.

The length of the pin 54 is such that when the piston 49 is at the lowest position, the upper end of the pin 54 is connected to the first rotating member 1.
4, and the sensor rod 55
The length of the rod 55 is set to such a length that the lower end of the rod 55 does not enter into the rotating member 14 when the flange portion 55a is at the lowest position.

As described above, the engagement pin 46 projecting freely from the first rotating member 14 and the wedge-shaped groove 47 formed in the flange portion of the tool holder 7 constitute a clutch.

Next, the tool holder 8 of the die tool and the second rotating member 15 that engages with the holder 8 will be explained. As shown in FIGS. 4 and 5, the tool holder 8 of this embodiment is integrally attached to the lower turret 4. It is a cylindrical body with an upper flange that is rotatably loaded into a fixed support cylinder 61, and a die tool 6 is fastened to the upper part by known means, and the support cylinder 61 and the tool holder 8 A cam lever 62 as described below provided at the bottom of the tool holder 8 selectively selects either a rotatable state or a non-rotatable state.

That is, as shown in FIG. 5, at the bottom of the tool holder 8 there is a substantially L-shaped cam lever 62 that rotates around a support shaft 63, and a spring 64 that presses against the cam surface of the head of the cam lever 62. Working pin 65
Normally, the cam lever 62 is pushed by the action pin 65, and the tip 62a of the cam lever itself fits into the groove 66 formed in the support cylinder 61 to prevent rotation (see left side in FIG. 5). ), a later-described engagement pin 67 extending from the second rotating member 15
When the base of the cam lever 62 is pushed upward and the cam lever 62 rotates against the working pin 65, and its tip 62a comes off the groove 66, the tool holder 8 is moved against the support cylinder 61, It is designed to be rotatable relative to the lower turret 4 (see right side in Figure 5). It should be noted that the cam lever 62 is connected to the two opposing cam levers of the tool holder 8.
The lower part of the tool holder 8 into which the engaging pin 67 enters is formed into a wedge-shaped groove 68 to match the shape of the tip of the engaging pin 67. Fifth
In the figure, the engagement pin 67 is in different states on the left and right sides, but this is shown for convenience of explanation.
In reality, the two engaging pins 67 protrude and retract at the same time.

Next, the second rotating member 15 moves to the punching position P on the lower frame 2, as shown in FIG.
It is a cylindrical body rotatably loaded in a support cylinder 69 provided in
5a is formed, and the worm gear 17 is meshed with the worm gear 17.
The following fluid cylinder 71 is provided inside, and two engaging pins 67 are inserted upward from the second rotating member 15.
It is designed so that it can protrude at will.

That is, a fluid chamber 73 in which the piston 72 can freely move up and down is formed at two opposing locations in the second rotating member 15 , and upper and lower ports 74 and 75 of the fluid chamber 73 are connected to the rotating member 15 . The piston 72 is formed in an annular groove along the entire outer circumference of the piston 72 so that the piston 72 can be freely moved up and down by external fluid control. It is fixed in one piece.

Further, another pin 7 is provided on the lower surface of the piston 72.
6 are fixed together, and the piston 72 is the fourth
When the rotating member 15 moves up and down in the illustrated rotational position, the lower end of this pin 76 moves up and down a sensor rod 78 that is movable laterally up and down via a seesaw-shaped lever 77 that is provided on the lower frame 2.
By detecting the position of the dog 79 protruding from the sensor rod 78 using two proximity sensors 81 and 82, it is possible to detect whether the engagement pin 67 is protruding or retracted.

Reference numeral 83 is a support shaft of the seesaw-shaped lever 77, reference numeral 84 is a guide frame for the sensor rod 78, and reference numeral 85 is a spring that always urges the sensor rod 78 downward.

As described above, the engagement pin 67 projecting freely from the second rotating member 15 and the wedge-shaped groove 68 formed in the lower part of the tool holder 8 constitute a clutch.

It should be noted that the respective clutches consisting of the pins 46, 67 and the wedge-shaped grooves 47, 68 formed in the respective tool holders 7, 8 may be meshing clutches made of engaging members of various other shapes.

Furthermore, the fluid cylinders 48 and 71 for moving the engagement pins 46 and 67 up and down may be electrical drive sources such as solenoids.

Next, the operation of the above-mentioned embodiment will be explained. Since the device of the above-mentioned embodiment has the structure as explained above, the turrets 3 and 4 rotate to move the desired punch tool 5 and die tool 6 to the ram. 9 position, that is, the punching processing position P, the fluid cylinders 48, 71 in each rotating member 14, 15
When the engaging pins 46 and 67 are respectively protruded, the tips of the engaging pins 46 and 67 fit into the wedge-shaped grooves 47 and 68 formed in the tool holders 7 and 8, and the first rotating member 14 and the tool holder 7, and the second rotating member 15 and the tool holder 8 are connected, respectively.

The rotation angle of the punch tool 5 and the rotation angle of the die tool 6 when connected are adjusted in advance to be in the same phase, and the rotation angle of the servo motor 29 at this time is set to the origin using the method described above. .

As the engagement pins 46, 67 are fitted, the cam levers 41, 62 are simultaneously disengaged, so that the tool holders 7, 8 can freely rotate relative to the turrets 3, 4, and the sensor rods can be rotated freely. By detecting the vertical positions of 55 and 78 with a proximity sensor, it was confirmed that the engagement pins 46 and 67 were securely engaged with a total of four grooves 47 and 68 above and below, and furthermore, the fluid ports 52 and 74 side, In other words, after confirming with the pressure switch that the fluid pressure in the fluid chamber on the side that causes the engagement pins 46, 67 to protrude has reached a predetermined pressure (via the AND circuit), the servo motor 29 must be activated. is rotated by a predetermined angle, and the transmission shafts 24, 25, the worm gear 1
The first and second rotating members 14 and 15 are rotated by the same predetermined angle via a transmission system consisting of 6, 17, etc.
In the end, the punch tool 5 and die tool 6 are rotated by the same angle.

After the tools 5 and 6 are rotated as described above, the ram 9 moves up and down to perform a predetermined punching process, and then the servo motor 29 is rotated again to move the first and second rotating members 14 , 15 are returned to their original positions, that is, the tools 5, 6 are returned to their original angles, and the engagement pins 46, 67 are moved to their respective rotating members 14, 15.
15 and the connection is removed.

At the same time as the connection is removed, the cam lever 41,
62 is pushed by each working pin 44, 65 and engages with the grooves 45, 66 on the turrets 3, 4 side, respectively, and the tools 5, 6 and tool holders 7, 8 are again unable to rotate with respect to the turrets 3, 4. is held in a fixed state.
After being in the fixed state, the turrets 3 and 4 rotate and the tools 5 and 6 maintain their original positions even if they are subjected to vibrations.

Moreover, each rotating member 14 of the engagement pin 46, 67,
15, the pins 54 and 76 on the other side are
This is confirmed by proximity sensors 56, 82 by moving sensor rods 55, 78, respectively.

In the above description, a pair of punch tools 5 and die tools 6 on the turrets 3 and 4 were explained, but all the punch tools on the turrets 3 and 4,
The die tools may have the same rotatable structure using the tool holders 7 and 8, or any number of tools at any location may be rotatable, and the other tool pairs may be fixed to the turret. Of course.

Furthermore, the shape of the cam levers 41 and 62 is as follows:
This is not limited to the embodiment described above, and does not rotate around the support shafts 42, 63; one end is fixed inside the tool holder 7, 8, and the other end is the engaging portion 41a of the cam lever 41, 62. , 62a, or a slider.

Further, the groove 4 into which the engagement pins 46 and 67 fit is provided.
7, 68, cam levers 41, 6 provided in the grooves
2, and the grooves 45, 66 on the turrets 3, 4 side that the cam levers 41, 62 engage with are 180
It is not limited to two locations for each degree, but may be four or more locations for each 90 degrees.

〔Effect of the invention〕

As is clear from the above explanation, if the tool holder according to the present invention is used, there is no need to attach a rotation prevention device around the tool holder, and the rotation amount of the rotation prevention device can be made as small as possible, and , its operation is automatically performed by engaging and disengaging the engaging member, eliminating the need for a new control device.
Therefore, it is possible to easily realize a new type of punch press machine in which the engagement member for rotational drive from the outside is directly engaged with and disengaged from the tool holder.

Furthermore, the tool holder itself has the advantage of not having many parts and is reliable in operation despite its simple structure.

[Brief explanation of drawings]

Fig. 1 is a side view mainly of the turret portion of a turret punch press machine equipped with a tool holder according to the present invention, and Fig. 2 is a partially sectional side view of the punch tool, tool holder, and first rotating member portion. , Figure 3 is a vertical cross-sectional side view of the punch tool and tool holder part,
Fig. 4 is a partial cross-sectional side view of the die tool and the second rotating member of the tool holder, and Fig. 5 is a - of Fig. 4.
FIG. 3... Upper turret, 4... Lower turret, 5... Punch tool, 6... Die tool, 7,8
...Tool holder, 36...Support cylinder, 41...Cam lever (cam piece), 41a...Back part, 45...
...Groove portion, 46...Engaging pin (engaging member), 47...
... Wedge-shaped groove, 61 ... Support cylinder, 62 ... Cam lever, 62a ... Tip, 66 ... Groove, 67 ...
...Engaging pin (engaging member), 68... Wedge-shaped groove.

Claims (1)

[Claims] 1 A tool holder for supporting a mold such as a punch tool or a die tool, which is rotatably provided on a base such as a frame or a turret, and has a groove formed on its outer periphery into which an engaging member for rotational driving is fitted. A cam piece is provided at the bottom of the groove to be displaced by fitting and removing the engaging member, and the displacement width of the cam piece is a width extending from the inside of the tool holder to the inside of the base of the frame or turret, etc. A tool holder for a punch press machine, characterized in that the base is formed with a groove into which the cam piece enters, and the cam piece serves as a rotation stopper for the tool holder.