KR102044850B1 - Press having stripper operated by servo motor - Google Patents

Abstract

The present invention relates to a press having a servo-driving stripper, comprising: a servo-motor (100); a slide guide (200); an operating link (300); and a guide block (400). Therefore, marketability and market competitiveness of the press can be maximized.

Description

Press having stripper operated by servo motor

The present invention relates to a press having a servo drive stripper, and more particularly, in the deep drawing process of a press, a stripper for holding a molded product while being lifted independently of a punch around a punch is improved, and a plurality of steps according to different lifting stroke diagrams are provided. It is possible to control the stripper independently, and in particular, it is a device for making it possible to vary the lifting stroke in response to the change of the molded article, it is possible to form a good quality without defects, in particular, the processing shape and dimensions of the molded article In response to the change, it is possible to easily change the lifting stroke of the stripper in a short time, and to reduce the initial setting time of the operator and to maximize the marketability and marketability of the press.

In general, a press is a general term for a machine tool which applies a force to a material and plastically deforms to perform bending, shearing, cross-sectional shrinkage, and the like.

Representative examples of the press working are various plastics produced by applying a compressive force to a relatively thin metal sheet and plastically deforming, and are widely used in everything from precision parts of watches and cameras to automobile bodies.

As a material for press working, steel sheets, copper plates, brass plates, aluminum plates, plastics, fibers, and the like are used, and the characteristics of the press working can be processed without applying heat, and they can be processed to exact dimensions and shapes in a short time. It has the advantage of being exchangeable and excellent in mass production.

In various types of processing by presses, deep drawing generally means processing into seamless, relatively deep container-shaped products using punches and dies.

1 is a view showing a general deep drawing process, deep drawing is difficult to form a molded article by only one process, as shown in FIG. The molded article W can be molded by repeating several processes while advancing to pitch.

Such deep drawing processing typically requires a stripper on the press, and the stripper receives a rotational force through a path independent of the punch from the driving source, and interlocks, and a predetermined lifting stroke different from the punch around the punch during deep drawing processing. As the elevating according to the diagram serves to hold the edge of the molded product (W).

If the stripper fails to elevate according to the desired lift stroke diagram, wrinkles occur at the edges near the bottom of the molded article W, which causes product defects.

2 is a lifting stroke diagram of a punch and stripper for a molded article formed by a general deep drawing, for example, about 10 or more various steps are required to form a battery case for an electric vehicle into a deep drawing.

2A is a lifting stroke diagram of the optimum stripper required in the second step, and FIG. 2B is a lifting stroke diagram of the optimum stripper required in the third step. FIG.2 (c) has shown the lifting stroke chart of the optimum stripper required by the 4th step.

That is, as shown in Fig. 2, the lifting stroke curve of the punch in the diagram is kept uniform without distinction of each step, but the lifting stroke diagram for the stripper needs to elevate the stripper with different lifting stroke diagrams for each step. It is.

FIG. 3 is a rear perspective view showing a press with a conventional stripper, and FIG. 4 is a rear perspective view showing a conventional stripper, where a conventional stripper is provided in the press 1 as shown in FIGS. 3 and 4. It was driven by the rotational force transmitted from the drive source 10 through a path independent of the punch.

More specifically, as shown in FIG. 3, when the flywheel 60 is rotated through a motor which is a driving source 10 of the press, the rotational force of the flywheel 60 is transmitted to the punch, while a plurality of chains ( 70) and through the sprocket 80, it is also transmitted to the stripper 40 at the lower rear side of the press 1.

As such, the cams 41, 42, 43, and 44 corresponding to the respective steps in FIG. 4 are rotated by the rotational force transmitted to the stripper 40, and thus the punches around the periphery of the punch not shown. Independently raising and lowering the guide block 45 of the stripper 40.

Here, the guide block 45 of the stripper 40 must be raised and lowered according to different optimum lifting stroke diagrams for each step illustrated in FIG. 2 so that a defective molded product does not occur.

FIG. 5 is a right side view showing a cam provided in each step in the conventional stripper, that is, each step so that the stripper 40 moves up and down in accordance with the lifting stroke diagram shown in FIG. 2 corresponding to each step. Cams 41, 42, 43, and 44 are manufactured in slightly different circumferential shapes as shown in FIG.

However, in the conventional stripper 40, it is difficult to manufacture the cams 41, 42, 43, 44 having an appropriate circumferential shape in order to raise and lower the guide block 45 according to the optimum lifting stroke diagram according to each step. It was very difficult.

For example, the cams 41, 42, 43, and 44 provided in the conventional stripper 40 generate continuous friction during driving, and must be made of a material that must maintain its shape continuously even in a high temperature environment. In general, it is impossible to manufacture by general cutting process, and it can be manufactured only through electric discharge machining, so a relatively long production period is required.

In addition, if the cams 41, 42, 43 and 44, which have been manufactured once, are not manufactured correctly in a desired shape, it is impossible to correct by cutting only a portion of the cams 41, 42, 43. There is a technical problem that it takes a long manufacturing cost and a long time to manufacture a large number of cams (41, 42, 43, 44) in a shape corresponding to the optimum lifting stroke diagram, such as the need to re-manufacture, 44) .

In addition, the stripper 40 driven by the cams 41, 42, 43, 44 operates while the rotational speed of the cams 41, 42, 43, 44 increases as the operating speed of the press 10 increases. There is a high possibility of an error, and in particular, as shown in FIG. 4, an elastic body 46 must be provided for the return of the stripper 40. If the spring constant of the elastic body 46 is too large, the cams 41, 42, 43, 44, the frictional heat is excessively generated, there is also a problem that if the spring constant is too low, the stripper 40 does not operate at an appropriate timing.

In addition, the conventional stripper 40 transmits rotational force through a plurality of chains 70 and sprockets 80 from the driving source 10 to the stripper 40, as shown in FIG. The structure was complicated and in particular, the chain 70 had a problem that the risk of occurrence of a safety accident, such as a worker's body part or work clothes are pinched.

The present invention is to solve the above problems, it is possible to independently control a plurality of strippers at the most appropriate lifting timing required in each step during the deep drawing process of the press, it is possible to form a good quality without defects, in particular, Servo drive stripper that can easily change the lifting stroke of the stripper in a short time in response to the change of the processed shape or the dimension of the molded product, shortens the initial setting time of the operator and maximizes the commercialization and market competitiveness for the press. To provide a press provided.

The present invention is a press for carrying out a deep drawing by lifting the upper die provided with a plurality of punches from the lower die provided with a plurality of dies received a rotational force from the drive source while sequentially conveying the molded article according to a plurality of steps; A servo motor having a vertical rotation axis and capable of controlling a rotation angle of the rotation axis according to an electrical signal; A slide guide which is guided along a guide shaft which is vertically provided, and which is lifted in accordance with the rotation of the rotary shaft by embedding a ball screw connected to the rotary shaft; A movable link rotatably supported about a pivot axis in association with the lifting and lowering of the slide guide; A guide block connected to the movable link and positioned around the perimeter of the punch to move up and down independently of the punch; This is achieved by the further configuration of the stripper.

Here, the stripper is preferably provided to drive each of two or more steps independently.

In addition, a control unit including an input device, an output device, an arithmetic device, and a storage device is additionally configured, and the control unit may control the guide blocks provided in the two or more strippers, respectively, with different lifting stroke diagrams.

In addition, the drive source rotates the crankshaft, and includes a detection servo is further configured to detect the rotational speed and the rotation angle of the crankshaft in real time to output an electrical signal, the control unit is output from the rotation detector It would be desirable to synchronize the stripper by receiving the electrical signal.

In particular, the movable link is provided with a Y-shaped fork; Two ends of the fork are rotatably supported by connecting pins machined on both sides from a cylinder in a plane; Horizontal slots are formed concave on both sides so that the connecting pins are inserted into and guided back and forth, and the guide block is provided at the bottom thereof, and a holder in which the punch holders for supporting the punch penetrates up and down are additionally configured. Most preferred.

The present invention as described above is capable of independently controlling a plurality of strippers at the most appropriate lifting timing required in each step during deep drawing processing of the press, so that high-quality molding without defects is possible. In response to the change it is possible to easily change the lifting stroke of the stripper within a short time to reduce the initial setting time of the operator and to maximize the commercialization and market competitiveness for the press.

1 is a diagram showing a general deep drawing process;
2 is a lifting stroke diagram of a punch and stripper for a molded article formed by a general deep drawing;
3 is a rear perspective view showing a press with a conventional stripper;
4 is a rear perspective view showing a conventional stripper;
5 is a right side view showing a cam provided in each step in the conventional stripper;
6 is a front view showing a press provided with the servo drive stripper of the present invention;
7 is a perspective view showing a press with a servo drive stripper of the present invention;
8 is a rear perspective view showing a press with a servo drive stripper of the present invention;
9 is a rear perspective view showing the stripper in the press provided with the servo drive stripper of the present invention;
10 is a rear exploded perspective view showing a stripper in the press provided with the servo drive stripper of the present invention;
Fig. 11 is a diagram showing a schematic configuration of a control part in the press provided with the servo drive stripper of the present invention.

Fig. 6 is a front view showing a press with a servo drive stripper of the present invention, Fig. 7 is a perspective view showing a press with a servo drive stripper of the present invention, and Fig. 8 with a servo drive stripper of the present invention. It is a back perspective view which shows a press.

9 is a rear perspective view showing the stripper in the press provided with the servo drive stripper of the present invention, and FIG. 10 is a rear exploded perspective view showing the stripper in the press provided with the servo drive stripper of the present invention.

11 is a figure which shows schematic structure of a control part in the press provided with the servo drive stripper of this invention.

Specific structural or functional descriptions presented in the embodiments of the present invention are only illustrated for the purpose of describing the embodiments according to the inventive concept, and the embodiments according to the inventive concept may be implemented in various forms. In addition, it should not be construed as limited to the embodiments described herein, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Meanwhile, terms such as first and / or second in the present invention may be used to describe various components, but the components are not limited to the terms. The above terms are for the purpose of distinguishing one component from other components only, for example, within the scope not departing from the scope of the right according to the concept of the present invention, the first component may be called a second component, Similarly, the second component may also be referred to as the first component.

When a component is referred to as being "connected" or "connected" to another component, it is to be understood that the component may be directly connected or connected to that other component, but other components may be present in between. something to do. On the other hand, when a component is said to be "directly connected" or "directly contacted" to another component, it should be understood that there is no other component in between. Other expressions for describing relationships between components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to," should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. The terms "comprises" or "having" in this specification are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is implemented, and that one or more other features or numbers, It is to be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

The press equipped with the servo drive stripper of the present invention is capable of independently controlling a plurality of strippers at the most appropriate lifting timing required for each step during deep drawing processing of the press, so that high quality molding without defects is possible. It is possible to easily change the lifting stroke of the stripper in a short time in response to the change of the processing shape or the size of the cutting machine, which can shorten the initial setting time of the operator and maximize the commercialization and market competitiveness of the press. It is done.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 6 to 10, the press including the servo drive stripper according to the present invention receives a rotational force from the driving source 10 while sequentially transferring the molded article according to a plurality of steps. In the press (1) which raises and lowers the upper mold | type 30 provided with the several punch 31 from the lower mold | type 20 provided with the deep drawing; A servo motor 100 in which the rotating shaft 110 is positioned vertically and capable of controlling the rotation angle of the rotating shaft 110 according to an electrical signal; A slide guide 200 which is guided along the guide shaft 210 provided vertically, and which is lifted according to the rotation of the rotation shaft 110 by embedding the ball screw 220 connected to the rotation shaft 110; A movable link 300 rotatably supported about a pivot shaft 310 in association with the lifting and lowering of the slide guide 200; A guide block 400 connected to the movable link 300 and positioned around the periphery of the punch 31 to rise and fall independently of the punch 31; It is preferred that the stripper 40 be further configured.

First, the press equipped with the servo drive stripper of the present invention is basically based on the press 1 for performing a deep drawing process through a plurality of steps.

As shown in FIG. 6, the press 1 has a lower mold 20 at the lower portion of the body and an upper mold 30 at the upper portion of the body.

In this case, the lower die 20 has a number of dies 21 corresponding to the number of steps in parallel, and correspondingly, the number of punches 31 corresponding to the number of steps in the upper die 30 is also parallel. 6 is illustrated a press 1 including a total of 10 steps.

Here, the inner surface of the die 21 will be a shape corresponding to the outer surface of the molded article, the outer surface of the punch 31 will be a shape corresponding to the inner surface of the molded article.

Accordingly, when the flywheel 60 is rotated using the rotational force of the drive source 10, the deep drawing process is performed by the die 21 and the punch 31 while the upper die 30 is repeatedly lifted from the fixed lower die 20. Will be performed.

In addition, although not shown, in FIG. 6, a conveying apparatus for repeatedly conveying a molded article at a pitch corresponding to the interval between steps from left to right on the drawing will be provided.

Here, the drive source 10 is located in the upper back of the press 1 as illustrated in FIG. 8, may be an engine driven by fuel supply, or may receive a rotational force from the outside. In the invention, the motor that generates the rotational force in accordance with the power supply will be most preferred.

When the press 1 is operated in accordance with the above-described configuration, the punch 31 of the upper die 30 is repeatedly raised and lowered to perform deep drawing processing of the molded product step by step in the die 21 of the lower die 20.

In such a deep drawing process, the stripper 40 for holding the edge of the molded product while pressing up and down according to a predetermined lifting stroke diagram (see FIG. 2) different from the punch 31 around the punch 31 is pressed as shown in FIG. 8. It is firmly fixed to the rear lower body of (1).

In the present invention, the stripper 40 includes a servo motor 100, a slide guide 200, a movable link 300, and a guide block 400 as shown in FIGS. 9 and 10.

First, the servo motor 100 may rotate the rotation shaft 110 at a desired rotation speed and rotation angle in accordance with an electrical signal, and the servo motor 100 may be vertical so that the rotation shaft 110 faces upward. To be positioned.

The rotation shaft 110 of the servo motor 100 is connected to the ball screw 220 provided in the slide guide 200, so that the slide guide 200 is elevated in accordance with the forward and reverse rotation of the ball screw 220. It can be.

At this time, the slide guide 200 is positioned in the guide frame 201 having a substantially hexahedron shape, and in the guide frame 201, the guide shafts are perpendicular to both sides with respect to the slide guide 200 located at the center. 210 is provided, the slide guide 200 is guided by the guide shaft 210 can be moved up and down.

In addition, the servo motor 100 described above may be preferably fixed to the bottom surface of the guide frame 201 through a separate bracket 101.

In addition, the cover 202 is assembled to both side surfaces of the guide frame 201 to prevent foreign matter from entering the guide frame 201 and to prevent the slide guide 200 from being exposed to the outside and to protect it.

The lifting link 230 is connected to the upper side of the slide guide 200 such that the lifting link 230 is elevated with the slide guide 200 integrally, and the lifting link 230 is the above-mentioned guide. The upper surface of the frame 201 is vertically penetrated.

At this time, although not shown, a bearing supporting an outer circumferential surface of the elevating link 230 is provided in the upper surface of the guide frame 201 to allow only the elevating link 230 to move in the vertical direction. Good.

The upper end of the elevating link 230 is connected to one side of the movable link 300 through the connecting link 240, the movable link 300 is approximately horizontally positioned to press (1) through the pivot shaft 310 It is rotatably supported by the body of

Through this, the movable link 300 is operated like a see-saw based on the pivot shaft 310, and the guide block 400 is connected to the other side of the movable link 300, Finally, the guide block 400 is elevated.

Here, the guide block 400 is positioned around the periphery of the punch 31 to lift up and down independently of the punch 31 to substantially hold the edge of the molded article.

According to this configuration, when the servo motor 100 rotates in the forward and reverse direction, the slide guide 200 is guided and lifted by the guide shaft 210 through the ball screw 220, of the slide guide 200 The lifting and lowering is transmitted to the movable link 300 through the elevating link 230 and the connecting link 240 so that the movable link 300 is elevated with respect to the pivot shaft 310 to finally elevate the guide block 400. It is to be made.

Accordingly, the stripper 40 according to the present invention can raise and lower the guide block 400 independently of the punch 31 around the periphery of the punch 31 according to the optimum lifting stroke diagram.

According to this configuration, it is possible to eliminate the chain or sprocket for transmitting the rotational force through a path independent from the punch 31 from the drive source 10 to the stripper 40 as in the prior art, making it simpler structure It is possible to prevent the safety accidents that can be caused by the chain.

In the present invention, it is preferable that the stripper 40 is provided so as to independently drive two or more steps.

In the figure, it is illustrated that the stripper 40 is independently provided and driven in the third step, the fourth step, and the fifth step, respectively.

As described above, in the deep drawing molding of the press 1, the stripper 40 must operate with different optimum lifting stroke diagrams in a number of steps.

Correspondingly, in the present invention, it is preferable to configure each of the two or more steps to be driven independently. For example, by arranging three strippers 40 side by side so as to correspond to the three steps as shown in FIG. The guide block 400 of each stripper 40 can be raised and lowered to different strokes according to the optimum lifting stroke diagram required for.

In the present invention, as illustrated in FIG. 11, a control unit 50 including an input device 51, an output device 52, an arithmetic device 53, and a storage device 54 is further configured. The controller 50 may be able to control the guide block 400 provided in each of the two or more strippers 40 by different lifting stroke diagrams.

For example, a keyboard, various buttons, a touch screen, and the like are configured as the input device 51, a monitor, a warning lamp, a speaker, and the like are configured as the output device 52, and a CPU and the like are configured as the computing device 53. It will be possible to.

In addition, by configuring a hard disk or the like for storing various setting values as the storage device 54, for example, an operator selects a predetermined step through the input device 51 or draws a lift stroke diagram of the selected step. It will be possible to change it, and the output device 52 will be able to display the lifting stroke diagram currently set to the operator, and it will be possible to store the set value in the storage device 54.

Accordingly, the operator can easily perform a task such as selecting a predetermined step from the plurality of steps through the control unit 50, changing the lifting stroke diagram of the selected step.

As a result, after setting the optimum lifting stroke diagram, if wrinkles occur in the molded article during the trial run, it will be possible to change the setting of the corresponding section only high or low in the lifting stroke diagram of the step.

Therefore, the present invention can be set to raise and lower the guide block 400 of the stripper 40 with the optimum lifting stroke diagram, if you want to change the set value or the shape of the molded article itself during the trial run, the stripper 40 The elevating trajectory of the guide block 400 of) can be easily and conveniently set and changed.

In addition, in the present invention, the drive source 10 rotates the crankshaft 11, including a detection servo to detect the rotational speed and the rotation angle of the crankshaft 11 in real time to output an electrical signal. The rotation detector 500 is further configured, and the controller 50 may receive the electrical signal output from the rotation detector 500 to synchronize the stripper 40.

That is, in the present invention, by driving the drive source 10 to rotate the crankshaft 11 through the flywheel 60, deep drawing processing is performed, and at the same time the stripper 40 is a separate drive source servo motor 100 It is necessary to synchronize the crankshaft 11 with the servo motor 100 of the stripper 40 because it is driven by

To this end, as shown in FIG. 7, a separate rotation detection unit 500 is provided near the crankshaft 11 of the press 1, and a detection servo is built in the rotation detection unit 500, thereby providing the rotation detection unit. The 500 detects the rotational speed and the rotation angle of the crankshaft 11 in real time, and transmits the detected value to the control unit 50 as an electric signal.

In addition, the controller 50 is electrically connected to the servo motor 100 of the stripper 40, and based on the electrical signal received from the rotation detector 500, the servo motor of the stripper 40 ( It is possible to synchronize 100).

Accordingly, for example, when the rotation angle of the crankshaft 11 is 0 °, the guide block 400 is positioned at the top dead center by placing the slide guide 200 of the stripper 40 at the bottom dead center. It will be possible to synchronize in this state.

Lastly, in the present invention, the above-described guide block 400 is supported by the movable link 300 that moves in an arc, and when the guide block 400 moves up and down, fine movement of the guide block 400 will occur.

In the present invention, the movable link 300 is provided with a Y-shaped fork 320 to offset the flow in the front and rear directions; Two ends of the fork 320 are rotatably supported by connecting pins 330 which are machined on both sides from a cylinder in a plane; Horizontal slots 341 are recessed on both sides such that the connecting pins 330 are inserted into and guided back and forth, and the guide block 400 is provided at the bottom thereof to support the punch 31. Most preferably, the holder 340 is further configured to penetrate 32 up and down.

That is, in the present invention, the guide block 400 is connected to the movable link 300 to move up and down, but can be prevented from moving back and forth.

For example, as illustrated in FIGS. 9 and 10, a fork 320 having a substantially Y shape is provided on the movable link 300, and the connecting pins protruding inwardly are formed at two ends of the fork 320. 330 is rotatably provided.

At this time, the shape of the connecting pin 330 is a cylindrical shape, but the upper side and the lower side is cut into a plane such that the connecting pin 330 is located in the slot 341 formed horizontally on the holder 340.

In addition, the above-described guide block 400 is fixed to the lower portion of the holder 340 through the guide punch frame 410, and as a result, the holder 340 and the guide block 400 are aligned up and down inside. The punch 31 and the punch holder 32 can be located in the holes.

As a result, even when the movable link 300 makes circular motions, the guide block 400 moves around the punch 31 and the punch holder 32 around only the punch 31 and the punch holder 32, which are only lifted in the vertical direction. It becomes possible to get up and down independently of

Hereinafter, the operation of the present invention with reference to the drawings.

The press provided with the servo drive stripper of the present invention configured as described above moves the upper die 30 from the lower die 20 fixed while the crankshaft 11 rotates through the flywheel 60 according to the operation of the drive source 10. The deep drawing process is performed for each step.

In this state, the stripper 40 moves up and down around the periphery of the punch 31 through the movable link 300 while the slide guide 200 moves up and down according to the forward and reverse rotation of the servo motor 100. It is possible to do

At this time, the guide block 400 has the optimum lifting stroke diagram is stored in the control unit 50 according to the step, the guide block 400 of the stripper 40 is punched 31 according to the optimum lifting stroke diagram. By raising and lowering independently from the punch 31 around the periphery, it becomes possible to effectively prevent wrinkles from occurring inside the deep drawing molded article.

Therefore, the present invention is capable of independently controlling a plurality of strippers at the most appropriate lifting timing required in each step during deep drawing processing of the press, so that high quality molding without defects is possible, and in particular, the processing shape or the size of the molded article is changed. In response to this, it is possible to easily change the lifting stroke of the stripper in a short time.

In particular, the present invention is an invention that can shorten the initial setting time of the operator and maximize the commercialization and market competitiveness of the press because the elevator is also set in the lift stroke diagram to change the lift setting of the desired section.

In particular, it is not necessary to manufacture a cam through the discharge machining step by step as in the prior art, and even at high speed operation, the accurate driving of the stripper 40 is possible by the servo motor 100, and the occurrence of a safety accident by the chain 70 There is a difference that there is no concern.

The above embodiment is an example for explaining the technical idea of the present invention in detail, and the scope of the present invention is not limited to the above drawings and embodiments.

1: press 10: driving source
11: crankshaft 20: lower type
21: Die 30: Pictograph
31: Punch 32: Punch Holder
40: stripper 50: control unit
51: input device 52: output device
53: operation unit 54: storage unit
60: flywheel 100: servo motor
101: bracket 110: rotation axis
200: slide guide 201: guide frame
202: cover 210: guide shaft
220: Ball screw 230: Lift link
240: connection link 300: movable link
301: support frame 310: pivot axis
320: fork 330: connecting pin
340: holder 341: slot
400: guide block 410: guide punch frame
500: rotation detection unit

Claims (5)

A press for carrying out deep drawing by lifting a top die provided with a plurality of punches from a lower die provided with a plurality of dies while receiving rotational force from a driving source while sequentially conveying a molded article according to a plurality of steps;
A servo motor having a vertical rotation axis and capable of controlling a rotation angle of the rotation axis according to an electrical signal;
A slide guide which is guided along a guide shaft which is vertically provided, and which is lifted in accordance with the rotation of the rotary shaft by embedding a ball screw connected to the rotary shaft;
A movable link rotatably supported about a pivot axis in association with the lifting and lowering of the slide guide;
A guide block connected to the movable link and positioned around the periphery of the punch to move independently of the punch;
A press having a servo drive stripper, characterized in that the stripper is further configured. 2. The press as claimed in claim 1, wherein the strippers are provided to drive independently in two or more steps. 3. The controller of claim 2, further comprising a controller including an input device, an output device, an arithmetic device, and a storage device, wherein the controller is capable of controlling the guide blocks provided in the two or more strippers with different lifting stroke diagrams. Press equipped with a servo drive stripper. The apparatus of claim 3, wherein the driving source rotates the crankshaft, and further includes a rotation detector configured to detect a rotational speed and a rotation angle of the crankshaft in real time and output an electrical signal, including a detection servo. And a servo drive stripper for receiving the electrical signal output from the rotation detector to synchronize the stripper. The movable link of claim 4, wherein the movable link is provided with a Y-shaped fork; Two ends of the fork are rotatably supported by connecting pins machined on both sides from a cylinder in a plane; Horizontal slots are concavely formed at both sides such that the connecting pins are inserted into and guided back and forth, and the guide block is provided at the bottom thereof, and the holder for punching the punch holder for supporting the punch is additionally positioned. A press provided with a servo drive stripper.

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