JP3638721B2 - Punch press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary punch mounted on upper and lower mold support members, and a punch press having an improved drive system for rotationally indexing a die.
[0002]
[Prior art]
Conventionally, in a turret punch press, for example, one rotary punch and die are mounted at corresponding positions on the upper and lower turret disks. As an automatic index device for determining the angle of the rotary punch and die, the one shown in FIG. 2 is known.
[0003]
That is, in FIG. 2, the rotary punch P and the die D are rotatably mounted on the lower turret disk, and the worm wheels 101P and 101D are fitted to the rotary punch P and the die D, respectively. Yes. Worm gears 103P and 103D are meshed with the worm wheels 101P and 101D. One end of the universal joints 107P and 107D is clamped to the worm gears 103P and 103D via the point shafts 105P and 105D, and the other ends of the universal joints 107P and 107D are connected to the intermediate drive unit 109.
[0004]
One end of rotating shafts 111P and 111D is connected to the intermediate drive unit 109, and pulleys 113P and 113D are attached to the rotating shafts 111P and 111D. In addition, a timing belt 115 is wound around the pulley 113P and the pulley 113D. An AC servo motor 117 is connected to the other end of the rotating shaft 111P.
[0005]
With the above configuration, when the AC servo motor 117 is driven, the rotating shaft 111P is rotated, so that the rotating shaft 111D is also rotated in synchronization with the pulley 113P, the timing belt 115, and the pulley 113D. As the rotary shafts 111P and 111D rotate, the worm wheels 101P and 101D are rotated via the intermediate drive unit 109, the universal joints 107P and 107D, the point shafts 105P and 105D, and the worm gears 103P and 103D, and the rotary punches P and D are synchronized. It rotates and is indexed to the required angle.
[0006]
[Problems to be solved by the invention]
By the way, in the above-described conventional auto index device, backlash occurs between the timing belt 115, the intermediate drive unit 109, the worm gears 103P and 103D, and the worm wheels 101P and 101D, so that adjustment is necessary and accuracy improvement is difficult. is there. In addition, since there are many rotation transmission mechanisms from the AC servo motor 117 to the worm wheels 101P and 101D at the final end, the overall inertia increases, the capacity of the AC servo motor 117 must be increased, and the number of rotations is increased. I can't. Further, since the rotary punch P and the die D are driven to rotate at the same time, correction cannot be made when the misalignment between the rotary punch P and the die D occurs, and a saw blade-shaped jagged or bearded residue is likely to appear on the workpiece. There is a problem.
[0007]
The object of the present invention is to stop the conventional complicated rotational drive mechanism, to make the rotary punch and die accurate, to enable high-speed rotation, and to reduce the occurrence of whiskers and saw blades on the workpiece. Is to provide a punch press.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the punch press according to the present invention according to claim 1 is provided with a rotary punch and a direct drive motor for the die at corresponding positions of the upper and lower mold support members, respectively, and is directly rotated by each direct drive motor. The rotary punch and die to be indexed are provided in each direct drive motor.
[0009]
A punch press according to a second aspect of the present invention is the punch press according to the first aspect, wherein the upper and lower mold support members are upper and lower turret disks.
[0010]
Therefore, direct drive motors are provided at corresponding positions on the upper and lower turret disks as upper and lower mold support members, and each direct drive motor is provided with a rotary punch and die. Are individually driven to rotate the rotary punch and die independently to be indexed at a desired angle.
[0011]
Thus, since the rotary punch and die are directly driven by the direct drive motor, the rotation mechanism is simplified and the accuracy of the rotary punch and die is high, and high-speed rotation is possible. Moreover, the occurrence of beard-like residue and saw-toothed jagged edges on the work is reduced.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
[0013]
Referring to FIG. 1, upper and lower turret disks (upper and lower mold support members) 1 and 3 in a turret punch press as a punch press, for example, are provided facing each other. The shafts of the upper and lower turret disks 1 and 3 are respectively mounted with rotating shafts 5 and 7 in the upward and downward directions.
[0014]
With the above configuration, when the drive motor (not shown) is driven, the rotary shafts 5 and 7 are rotated, for example, synchronously via the drive transmission device, so that the upper and lower turret disks 1 and 3 rotate, Of the punches and dies mounted on the circumference on the lower turret disks 1 and 3 at an appropriate interval, a desired punch and die are indexed at the processing position.
[0015]
As shown in FIG. 1, the upper and lower turret disks 1 and 3 are mounted with rotary punches P and dies D, respectively. That is, mounting grooves 9 and 11 are formed on the right side of the upper and lower turret disks 1 and 3 in FIG. 1, and an absolute type DD motor (direct drive motor) is formed at the center of the mounting grooves 9 and 11. Fixing portions 17 and 19 of 13 and 15 are attached to the upper and lower turret disks 1 and 3 by a plurality of bolts 21 and 23.
[0016]
Rotating portions 25 and 27 are fitted to the fixing portions 17 and 19 of the DD motors 13 and 15 and are rotatably mounted in the mounting grooves 9 and 11.
[0017]
Lifter rings 29 and 31 are provided on the upper surfaces of the rotating parts 25 and 27, and are attached to the rotating parts 25 and 27 with a plurality of bolts 33 and 35. The rotary punches P and dies D are mounted on the shaft centers of the lifter rings 29 and 31 and engaged with keys 37 and 39.
[0018]
With the above configuration, when the DD motors 13 and 15 are driven, the rotating portions 25 and 27 are independently rotated with respect to the fixed portions 17 and 19, so that the rotating punch P and the die D are rotated and rotated. The punch P and the die D are rotated independently.
[0019]
Accordingly, since the rotary punch P and the die D can be directly and independently rotated by the DD motors 13 and 15, respectively, the mechanism is simplified, and high-speed rotation and accurate rotation positioning can be performed. In addition, there is extremely little inertia and energy can be saved. Further, since the rotary punch P and the die D are rotated by separate driving, the parameters can be corrected separately in the upper and lower directions, and the occurrence of a beard-like residue and a saw-toothed jagged shape on the work can be reduced.
[0020]
The DD motors 13 and 15 can be combined with intermittent rotation and continuous rotation, and can be freely indexed by 360 degrees, and are compact and high torque, so they are very suitable for the index of the rotary punch P and die D. It is.
[0021]
In addition, this invention is not limited to the example of embodiment mentioned above, It can implement in another aspect by making an appropriate change.
[0022]
【The invention's effect】
As can be understood from the examples of the embodiments as described above, according to the first and second aspects of the invention, the rotary punch and the die can be individually and independently rotated directly by the DD motor, so the mechanism is simple. Rotation positioning with high accuracy and high accuracy can be performed. In addition, there is extremely little inertia and energy can be saved. In addition, since the rotary punch and die are rotated by separate driving, the parameters can be corrected separately in the upper and lower directions, and the occurrence of whiskers and saw blades on the workpiece can be reduced.
[Brief description of the drawings]
FIG. 1 is a front view for explaining an automatic index of a rotary punch and a die according to an embodiment of the present invention.
FIG. 2 is a drive system diagram of a conventional rotary punch and die auto index.
[Explanation of symbols]
1 Upper turret disc 3 Lower turret discs 9 and 11 Mounting grooves 13 and 15 DD motor (direct drive motor)
29, 31 Lifter ring

Claims (2)

A direct drive motor for the rotary punch and die is provided at the corresponding position of the upper and lower mold support members, and a rotary punch and die that are directly indexed by each direct drive motor are provided for each direct drive motor. A featured punch press. 2. The punch press according to claim 1, wherein the upper and lower mold supporting members are upper and lower turret disks.

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