JP3123460U - Servo press with stroke setting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To individually set a ram stroke in a press work depending on the type of parts, and an expert must set it each time. In addition, even for a skilled person, a mold once set must be set every time it is replaced, and the working efficiency is significantly reduced.
In a servo press in which a ram is reciprocated by a screw mechanism by a servo motor, a handle for manually reciprocating the ram in the screw mechanism, and a machining completion position of a workpiece by a die attached to the servo press are detected. A sensor, storage means for storing the machining completion position of the workpiece determined by the handle operation as detection data of the sensor, and a control unit for controlling the servo motor based on the data stored in the storage means are provided.
[Selection] Figure 1

Description

The present invention relates to a servo press equipped with a manual stroke setting device.

Servo presses that perform metal processing such as punching, bending, and drawing of a workpiece by reciprocating a ram through a screw mechanism by a servo motor are widely used. The servo press is easy to set the ram stroke with high accuracy and is suitable for processing small precision parts.

  Generally, the press device is intended to process a large amount of parts, and is required to be processed continuously and efficiently by a set mold. What is important for press work is the setting of the ram stroke that is most suitable for the structure of the mold and the material and shape of the workpiece to be processed, along with the performance of the mold and its settings, which enables efficient and high-quality work. It can be performed.

  A press work for processing a large number of parts in the same manner can be performed relatively easily by a general worker, but it is actually necessary to have some skill in advance preparation such as setting of a ram stroke. If these are not performed reliably, it will lead to damage to the mold, defective products, and a reduction in work efficiency, which will greatly affect the processing unit price.

Die setting can be dealt with by sharing die sets, etc., but ram stroke setting differs depending on the type of parts, and there is a problem that an expert must set each time. In addition, even for a skilled person, a mold once set must be set every time it is replaced, and the work efficiency is remarkably lowered.

  In view of the above situation, the present inventor has completed the present invention as a result of earnest research. The feature of the present inventor is that in a servo press in which a ram is reciprocated by a screw mechanism by a servo motor, the screw mechanism A handle for manually reciprocating the ram, a sensor for detecting a workpiece machining completion position by a die attached to the servo press, and a workpiece machining completion position determined by operating the handle is stored as detection data of the sensor. A storage means and a control unit for controlling the servo motor based on the data stored in the storage means are provided.

  Here, the sensor referred to in the present specification detects the position at which a workpiece is processed by a servo press, and the optimum ram stroke is determined based on the material and shape of the workpiece to be pressed and the structure of the mold. This is intended to obtain data for setting. As such a sensor, a rotary encoder is generally used, but any sensor such as a linear encoder or a displacement sensor that can be obtained as data by measuring a displacement amount.

  In the present invention, a handle is provided in the screw mechanism of the servo press that serves as a means for reciprocating the ram by the screw mechanism. The ram can be moved by manually rotating the handle. Set the ram stroke suitable for the workpiece to be pressed by operating the handle. This set value is detected by a sensor, and the detected data is stored by the storage means. And based on the data memorize | stored in the memory | storage means, a servomotor is controlled by a control part and it uses for a continuous press work.

By providing a touch panel or the like using a sequencer as the storage means and the control unit, the setting operation can be facilitated, and operability such as switching between a plurality of setting values can be improved. The servo motor is not particularly limited, such as a general AC servo motor, and may have a built-in rotary encoder as a sensor.

  The servo press provided with the stroke setting device according to the present invention can greatly facilitate the setting operation on the press device side for a predetermined workpiece. In particular, the manual setting operation enables setting with a subtle sense that is transmitted to the hand according to the material hardness and thickness of the workpiece while being a servo press, enabling extremely high accuracy settings. .

Further, since the acquired data can be saved and reused, it is not necessary to reset every time the mold is exchanged, and it is possible to easily cope with a small quantity and a variety of press work. In addition, this leads to the ease of handling various press operations even by general workers, can reliably reflect the skills of skilled workers, and has extremely beneficial effects even when outsourcing processing to outside the company. Is.

The present invention provides a screw mechanism for reciprocating a ram in a servo press, a handle, a sensor for detecting a processing completion position of a workpiece, a storage means for storing detection data of the sensor determined by the handle operation, and a storage means. By providing a control unit for controlling the servo motor based on the stored data, the above-described problems have been solved.

  1A and 1B show an embodiment of a servo press 1 equipped with a stroke setting device according to the present invention. A handle 4 is attached to a nut holder 3 which is a female screw side of a ball screw for raising and lowering a ram 2. This is the structure provided. The handle of this example is provided with four ball-shaped grips, and by gripping and rotating one of them, the ram shaft 5 on the male screw side is moved up and down to raise and lower the tip of the ram 2. In the servo press 1, the nut holder 3 is rotated by the servo motor M via the timing belt 6 and is normally operated.

In setting the ram stroke for the workpiece W to be machined, the workpiece W is set on the lower die 7 and the handle 4 is manually operated to lower the upper die 8 to machine the workpiece W. The optimum value of the stroke in this case is stored, and the servo press 1 is operated based on this data.

As a control system of the servo press 1, the workpiece W is test-placed by operating the handle 4 as shown in FIG. In this case, the optimum value of the ram stroke is stored as detection data of the rotary encoder E. The detection data is stored and saved in sequence 9 as a controller. Such an operation in this example is performed by a touch panel display 10 provided on the front surface of the servo press 1 as shown in FIG. After the setting, the servo motor M is controlled by the servo amplifier 11 in response to the command signal from the sequence 9 and the predetermined work W is continuously pressed. Since the sequence 9 can store and save setting values for a plurality of workpieces W, a general worker can start work under optimum conditions simply by selecting a predetermined workpiece W from the touch panel display 10. It becomes.

One Example of the servo press provided with the stroke setting apparatus which concerns on this invention is shown, (a) is a front view, (b) is a side view. Example 1 It is a system configuration figure of the control system in the servo press provided with the stroke setting device concerning the present invention. (Example 2) The other Example of the servo press provided with the stroke setting apparatus which concerns on this invention is shown, (a) is a front view, (b) is a side view.

Explanation of symbols

M Servo motor E Rotary encoder W Work piece 1 Servo press 2 Ram 3 Nut holder 4 Handle 41 Grip 5 Ram shaft 6 Timing belt 7 Lower mold 8 Upper mold 9 Sequence 10 Touch panel display 11 Servo amplifier

Claims (3)

  In a servo press in which a ram is reciprocated by a screw mechanism with a servo motor, a handle for manually reciprocating the ram in the screw mechanism, a sensor for detecting a processing completion position of a workpiece by a die attached to the servo press, the handle Stroke setting characterized by comprising a storage means for storing the machining completion position of the workpiece determined by the operation as detection data of the sensor, and a control section for controlling the servo motor based on the data stored in the storage means Servo press equipped with equipment.   The servo press provided with the stroke setting device according to claim 1, wherein the ram is provided on the male screw side of the screw mechanism and the handle is provided on the female screw side.   The servo press provided with the stroke setting device of Claim 1 or 2 provided with the touchscreen display which performs the preservation | save operation to the memory | storage means of detection data, and the selection operation of the some data memorize | stored in this memory | storage means.

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