JPH0614909Y2 - Roll feed device in press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a roll feed in a press machine, and more specifically to a driven roll of a roll feed device,
The present invention relates to a roll feed device for a press machine that is released in synchronization with an eccentric shaft that vertically moves a ram of the press machine.

(Prior Art) Conventionally, in a press machine, an eccentric shaft is rotated to vertically move a ram, and the vertical movement of the ram causes a work to be pressed by the cooperation of an upper die and a lower die.

In order to feed this work in sequence, the press machine is provided with a roll feed device. This roll feed device is composed of a pair of driving rolls and driven rolls. The work is sandwiched between the driving rolls and the driven rolls to drive the driving rolls to provide intermittent feeding to the work.

During this time, the work is fed by a predetermined amount to the processing position of the press machine, and when the work is pressed, the driven roll must be released upward. In order to release the driven roll, conventionally, the driven roll is moved up and down by an air cylinder, or the driven roll is moved up and down by utilizing the operation of a ram in a press machine.

(Problems to be solved by the invention) By the way, the former means of moving the driven roll up and down by the former air cylinder of the prior art to relieve the air cylinder has a relatively poor followability, and therefore cannot cope with high speed was there.

On the other hand, in the latter means for moving up and down the driven roll by using the movement of the ram in the press machine,
There is a problem that the press machine itself needs to be modified and the press machine to be modified is limited.

The object of the present invention is to improve the above-mentioned problems by adopting a drive motor for vertically moving a driven roll of a roll feed device, corresponding to high speed, and without requiring a major modification of a press machine. It is an object of the present invention to provide a roll feed device for a press machine that is synchronized with the eccentric axis of the press machine.

[Constitution of device]

(Means for Solving the Problem) In view of the conventional problems as described above, the present invention is a drive for feeding a work by operating in association with the vertical movement of a ram that is vertically moved by the rotation of a crankshaft in a press machine. A rotation detecting device for detecting rotation of the crankshaft, which is a roll feed device in a press machine including a roll and a driven roll, and a driven roll releasably provided to the drive roll, and detection by the rotation detecting device. Drive motor that rotates in synchronism with the generated rotation, a cam that rotates in conjunction with this drive motor, and a driven roll that rotatably supports and is always urged downward and is vertically attached by the cam. And a roll support member that can be intermittently lifted against the power.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 3, the frame 3 in the press machine 1
A ram 7 that moves up and down along the guide members 5A and 5B is provided on the upper part of the. A crankshaft 11 serving as an eccentric shaft is provided above the ram 7 via a connecting rod 9.
Are connected. One end of the crankshaft 11 is linked via a gear mechanism 13 to a drive device (not shown). An upper sub-plate 17 having an upper die 15 is detachably attached to the lower surface of the ram 7.

A bed 19 is integrally attached to the lower portion of the frame 3, and a bolster 21 is provided on the bed 19. A lower sub-plate 25 having a lower mold 23 corresponding to the upper mold 15 is detachably mounted on the bolster 21.

An NC device 27 that automatically controls the press machine 1 is provided on the right side wall of the frame 3.

With the above configuration, the work W is placed on the lower die 23, the NC device 27 is operated, and the crankshaft 11 is rotated via the gear mechanism 13 by a drive device (not shown).
When the crankshaft 11 is rotated, the ram 7 is moved up and down via the connecting rod 9. The work W is pressed by the cooperation of the upper mold 15 and the lower mold 23 due to the vertical movement of the ram 7.

A roll feed device 31 for intermittently sequentially feeding the work W is arranged on the bases 29 on both left and right sides in FIG. 3 of the host 21 provided on the bed 19, and the roll feed device 31 is driven. Roll 33
And a driven roll 35. The drive roll 33 is driven by a drive motor such as a servo motor under the control of the NC device 27, and the work W is sandwiched between the drive roll 33 and the driven roll 35 and is intermittently fed in sequence.

As the roll field device 31, as shown in FIG. 1 and FIG. 2, a plurality of jack bolts 37 are attached to the base 29, and the jack bolts 37 are provided with bearings 39 via bearings 39. A drive shaft 41 extending in the left-right direction in FIG. 1 is rotatably supported.

A drive motor 43 such as a stepping motor is provided at the right end of the drive shaft 41.
Is connected to a rotation detecting device 11M such as an encoder mounted on the crankshaft 11. Crankshaft 1
The rotation detecting device 11M detects one rotation, and the drive motor 43 is rotated synchronously based on the detected rotation number.

A cam device 45 such as a plate cam is provided inside the bearing 39 that rotatably supports the drive shaft 41.

On the other hand, as shown in FIG. 2, the base 29 is provided with a pin 49 via a bracket 47. The pin 49 pivotally supports one end of a receiving plate 51 as a roll supporting member that rotatably supports the driven roll 35. The other end of the receiving plate 51 is placed on the cam device 45. One of the springs 53 is attached to the upper part on the other end side of the receiving plate 51, and the other of the springs 53 is attached to the bracket 55 provided on the base 29. The spring 53 is always attached downward. The driven roll 35 is urged against the drive roll 35 with a constant urging force.

With the above configuration, when the crankshaft 11 is rotated, the drive motor 43 is synchronously rotated via the rotation detection device 11M. When the drive motor 43 is rotated, the cam device 45 is rotated via the drive shaft 41. By rotating the cam device 45 clockwise in FIG. 2, the other end of the receiving plate 51 is lifted upward in FIG. 2 with the pin 49 as a fulcrum. Since the driven roll 35 is rotatably supported by the receiving plate 51, it is lifted (released) upward against the biasing force of the spring 53.

That is, the holding of the work W by the drive roll 33 and the driven roll 35 is released, and the work W becomes movable. Therefore, the pilot pin provided in the mold attached to the press machine 1 can be engaged with the positioning hole previously drilled in the work W to accurately position the work W.

The driven roll 35 is lifted up and released with respect to the drive roll 33 when the ram 7 reaches the bottom dead center.

Further, when the plate thickness of the work W changes, the drive shaft 41 is adjusted in the vertical direction by adjusting the jack bolt 37, so that the gap between the drive shaft 33 and the driven roll 35 is adjusted.

As described above, the drive motor 43 such as a stepping motor is adopted as a drive device for releasing the driven roll 35 from the drive roll 33, and the drive motor 43 is synchronized via the crankshaft 11 and the rotation detection device 11M. Therefore, the followability is better than that of the conventional air cylinder, and the workpiece W can be sequentially fed at high speed.

Further, since the press machine 1 itself has only the rotation detecting device 11M attached to the crankshaft 11, there is no need for special modification, and the press machine 1 can be adapted to the existing press machine 1.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[Effect of device]

As will be understood from the above description of the embodiment, in short, the present invention is a drive for feeding the work W in association with the vertical movement of the ram 7 which is vertically moved by the rotation of the crankshaft 11 in the press machine 1. A rotation detection device 11M for detecting the rotation of the crankshaft 11 as a roll feed device in a press machine including a roll 33 and a driven roll 35 and a driven roll 35 releasably provided to the drive roll 33. A drive motor 43 that rotates in synchronization with the rotation detected by the rotation detection device 11M, a cam 45 that rotates in conjunction with the drive motor 43, and a driven roll 35 that are rotatably supported and always move downward. And a roll support member 51 that is urged to move intermittently by the cam 45 against the vertical urging force. It is made of Te.

As is apparent from the above configuration, in the present invention, the cam 45 for releasing the driven roll 35 in the roll feed device is rotated in association with the drive motor 43, and the drive motor 43 is a press machine. The rotation detecting device 11M detects the rotation of the crankshaft 11 in No. 1 and the rotation is synchronized with the rotation detected by the rotation detecting device 11M.

Therefore, according to the present invention, it is needless to say that the roll feed device can be attached to the existing press machine and the release of the driven roll 35 in the roll feed device can be performed at a timing related to the vertical movement of the ram 7. As for the existing press machine, it suffices to connect the rotation detecting device 11M to the crankshaft 11, and it can be easily implemented for the existing press machine.

That is, the present invention detects the rotation of the crankshaft 11 of the press machine, rotates the cam 45 by the drive motor 43 that rotates in synchronization with the detected rotation, and releases the driven roll 35 by the cam 45. Therefore, it is possible to easily cope with the rotation characteristics and the like of each press.

[Brief description of drawings]

FIG. 1 is an enlarged side view of a roll feed device, which is the main part of the present invention, FIG. 2 is an enlarged view taken along the line II--II in FIG. 1, and FIG. 3 is an embodiment of the present invention. It is a front view of a press machine. 1 ... press machine, 7 ... ram, 11 ... crank shaft (eccentric shaft), 27 ... NC device, 31 ... roll feed device, 33 ... driving roll, 35 ... driven roll, 3
7 ... jack bolt, 41 ... driving shaft, 4 ... driving motor, 45 ... cam device, 51 ... receiving plate

Claims (1)

[Scope of utility model registration request] 1. A crankshaft (1) in a press machine (1)
A driving roll (3) that feeds the work (W) by operating in association with the vertical movement of the ram (7) that is vertically moved by the rotation of 1).
3) and the driven roll (35), and the driven roll (35) is releasably provided to the drive roll (33) to form a roll feed device in a press machine to rotate the crankshaft (11). A rotation detection device (11M) for detecting, a drive motor (43) that rotates in synchronization with the rotation detected by the rotation detection device (11M), and a cam (rotated in synchronization with the drive motor (43) ( 45), and a roll supporting member (51) which rotatably supports the driven roll (35) and is always urged downward and is intermittently lifted by the cam (45) against the urging force. And a roll feed device in a press machine.