JP2872380B2 - Gravity type work shooter controller - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial application field) The present invention makes it easy to take out a work by raising a ram when operating a dead weight type work shooter of a turret punch press. The present invention relates to a self-weight drop type work shooter control device.

(Prior Art) Conventionally, in a turret punch press, a workpiece, which is a piece or a piece cut out by a die, has been discharged from the turret punch press by lowering a work shooter by its own weight.

On the other hand, there are the following two methods as a pressing method.

(1) A method of lowering the ram from the top dead center to the bottom dead center and repeating the operation of returning to the top dead center again.

(2) The top dead center of the ram is only when the upper and lower turrets are rotated. Normally, the ram does not return to the top dead center but descends from the rising end to the bottom dead center and returns to the rising end again. .

Among them, item (1) had a large ram stroke, and it was difficult to increase the hit rate of the press. The term (2) is applicable only to the hydraulic press and cannot be used for the mechanical press. However, the hit rate can be improved because the ram stroke is shortened, and the hydraulic pressure is reduced because the ram stroke is shortened. In the case of a type press, there is an advantage that the oil discharge amount of the pump is reduced and the oil consumption is reduced.

(Problems to be Solved by the Invention) By the way, item (2) has the following problems.

A rising end position is provided in the ram stroke, and the stroke is shortened. However, at this rising end position, the mold protrudes below the upper turret in a protruding state, and the work is caught by this mold, and the work shooter is moved. Was not able to be taken out even if it was lowered.

An object of the present invention is to provide a proper rising end position to solve the above-mentioned problem, so that there is no hindrance to taking out a work during operation of a work shooter, the operation is smooth, and a ram stroke is provided. To reduce the weight of the work shooter and improve the hit rate.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a ram control provided on a ram of a hydraulic turret punch press and controlling the ram to punch a workpiece. An apparatus, a work shooter that is provided so as to be freely movable and drops the punched work by its own weight, and a rising end position of the ram suitable for taking out the work when the work shooter is operated is stored, and the operation of the work shooter is stored. A computing device that sets the ascending end position in the ram control device when a command is input, and outputs a descending command to the work shooter after the ram is positioned at the ascending end position. This is a weight-falling type work shooter control device.

(Operation) By adopting the self-weight falling type work shooter control device of the present invention, when the ram is operated between the rising end of the ram and the bottom dead center and the workpiece is punched without returning the ram to the top dead center, When the work shooter operates, the rising end position of the ram suitable for taking out the work is stored, and when an operation command of the work shooter is input, the ram control device sets the rising end position suitable for taking out the work. After the ram is positioned at the ascending end position, an arithmetic unit for outputting a descending command to the work shooter is provided. There is no hindrance to the take-out, the operation is smooth, the ram stroke is shortened, and the hit rate is improved.

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

FIG. 3 shows an example of a numerical control type turret punch press suitable for implementing the self-weight drop type work shooter control device according to the present invention. In the figure, reference numeral 1 denotes a turret punch press frame, on which an upper turret 3 and a lower turret 5 are rotatably mounted.
A plurality of dies (punches) 7 are mounted on the upper turret 3, and a plurality of dies (dies) not shown are mounted on the lower turret 5, respectively. These dies are selectively brought directly below the striker 9 by rotation of the upper and lower turrets 3 and 5, and cooperate with each other at a position directly below the striker 9 to perform punch press working. The striker 9 is driven by a ram stroke of a hydraulic ram 11 that can move up and down.

The work W is clamped on the frame 1 so as to be in the left-right direction and the front-back direction (the direction perpendicular to the plane of FIG. 2).
Is mounted with a clamp device 13 whose position can be changed. Further, the work W is an end material or a product punched out by a die, and by lowering the work shooter 15 provided on the frame 1, the work W is dropped by its own weight and taken out from the work outlet 17. Reference numeral 19 denotes a control panel for numerically controlling the turret punch press, and the control unit 21 of the self-weight drop type work shooter of the present invention is mounted in the control panel 19.

Next, the ram 11 operating in FIG. 3 has a long ram stroke as shown in FIG. 4 (A), and when the turrets 3, 5 at the top dead center rotate, the punch guide of the punch (die) 7 The lower end of 7A is in upper turret 3.

Further, when the workpiece W is processed as shown in FIG. 4 (B) and the same punch 7 is used for the next punching,
The ram 11 has a shorter ram stroke and a higher hit rate. At this time, the lower end of the punch guide 7A is at the rising end (first rising end) projecting from the lower end of the upper turret 3.
Therefore, even if the work shooter 15 is lowered, the work W may be caught by the punch guide 7A and may not be able to be taken out.

In order to operate the work shooter 15 as shown in FIG. 4 (C), the ram 11 is arranged so that the lower end of the punch guide 7A coincides with the lower end of the upper turret 3 so that there is no problem in taking out the work W. Set the rising end (second rising end).

Next, FIG. 1 shows a block diagram of an embodiment of the self-weight dropping type work shooter control device in FIG. In the figure, a self-weight drop type work shooter control device 21 includes an arithmetic device 23.
And lowering the work shooter 15, for example, the solenoid operated valve 25
And a hydraulic cylinder 27 for moving the work shooter 15 up and down by the electromagnetic operation valve 25, and a ram control device 29.

The arithmetic unit 23 receives and stores the set value b of the second rising end position of the ram 11 suitable for taking out the work W without any trouble, and when the operation command a of the work shooter 15 is inputted, it is stored earlier. After positioning the ram 11 at the second rising end position, a lowering signal of the work shooter 15 is output to the work shooter solenoid operated valve 25. The solenoid operated valve 25 operates the hydraulic cylinder 27 to lower the work shooter 15 to drop the work W by its own weight and to take it out.

Further, the ram control device 29 receives the work shooter operation command a
Is input, the stroke position of the ram 11 is set to the second ascending position suitable for taking out the work W, and when the work W is taken out, the lower end of the punch guide 7A is aligned with the lower end of the upper turret 3. To control.

FIG. 2 is a flowchart of the self-weight drop type work shooter control device in FIG. Step 1 in the figure
In (S1), the operation command a of the work shooter 15 is output,
In step 2 (s2), the position of the ram 11 is positioned at the second rising end, and in step 3 (3), the work shooter 15 is lowered to take out the work W. In step 4 (S4), the timer operates after confirming the lowering of the work shooter 15, and in step 5
In (S5), the work shooter 15 moves up again. If there is no lowering instruction of the work shooter 15 in the step (S1), the state returns to the initial state.

Therefore, when a lowering command of the work shooter 15 is issued, the ram 11 is moved so that the position of the ram 11 is at the second rising end position.
Is controlled, the work shooter 15 descends after being positioned in this way, and as shown in FIG.
As shown in (1), the work W can be smoothly taken out without any trouble, the stroke of the ram 11 can be shortened to an appropriate length, and the hit rate of the press can be improved.

It should be noted that the present invention is not limited to the above embodiment, but can be implemented in other aspects by making appropriate design changes.

[Effects of the Invention] As is clear from the above description, the self-weight drop type work shooter control device of the present invention operates between the rising end of the ram and the bottom dead center without returning the ram to the top dead center. When punching the workpiece, the rising end position of the ram suitable for taking out the work during the operation of the work shooter is stored, and the ram control device sets the rising end position suitable for taking out the work, and sets the rising end position to the rising end position. By providing an arithmetic unit that outputs a descending command to the work shooter after the ram is positioned, the problems of the prior art are effectively solved, and the ram is provided with a rising end position suitable for taking out a work,
There is no problem in taking out the work during the operation of the work shooter, the operation is smooth, the stroke of the ram is shortened to an appropriate length, and the hit rate can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the self-weight drop type work shooter control device in FIG. 3, FIG. 2 is a flowchart of the self-weight drop type work shooter control device in FIG.
FIG. 3 is a front view of a numerical control type turret punch press suitable for implementing the weight-falling type work shooter control device according to the present invention, and FIG. 4 shows a state diagram of the punch when the ram is operated. Is the top dead center of the ram when the turret is rotating,
FIG. 1B shows a first rising end during work processing, and FIG. 2C shows a second rising end during work shooter operation. 3 ... upper turret, 5 ... lower turret 7 ... punch, 11 ... ram 15 ... work shooter, 19 ... control panel 21 ... self-weight drop type work shooter controller 23 ... arithmetic unit, 25 ... Solenoid operated valve 29 ... Ram control device

Claims (1)

(57) [Claims] 1. A ram control device provided on a ram of a hydraulic turret punch press for controlling the ram so as to punch the work, and a work shooter provided movably to drop the punched work by its own weight. When the work shooter is operated, a rising end position of the ram suitable for taking out the work is stored, and when an operation command of the work shooter is input, the ram control device sets the rising end position to perform the ascending. An arithmetic unit that outputs a descending command to the work shooter after the ram is positioned at an end position.