KR101544149B1 - Dual servo press - Google Patents

Abstract

The dual servo press includes a bolster in which a workpiece is placed, a slide for pressing the workpiece in an upper part of the bolster, and a driving part for vertically moving the slide. The drive unit includes a left drive unit and a right drive unit. The left drive unit includes a left drive unit disposed at one upper side end of the slide. The right drive unit includes a right drive unit disposed at an upper end of the upper surface of the slide so as to be symmetric with the left drive unit.

Description

{DUAL SERVO PRESS} Low torque boost structure dual servo press

The present invention relates to a dual servo press, and more particularly to a dual torque sub-press.

BACKGROUND ART A servo press is a type of machine tool for performing press working on a workpiece. After placing the workpiece between upper and lower rams, a desired shape is produced by pressing the workpiece. Such a servo press has been developed in order to relatively increase the required power and productivity by replacing the driving part of the electric press of the conventional electric motor type with the servo motor.

However, in the case of the servo press developed until recently, it is merely a substitution of a conventional electric motor with a servo motor, and has the same structure as a conventional electric press. That is, it includes a direct-driven method of directly transmitting a driving force from a servo motor to a slide by a power transmission method, and uses a single servo motor as a driving unit. Therefore, a large-capacity, high-torque, large-capacity servomotor is required for press machining. As a result, power consumption increases and the size of the servo press increases, thereby increasing the space occupied by the servo press.

Furthermore, when a single servo motor is used, it is difficult to transfer a uniform load to the entire surface of the upper ram, so that right and left eccentric loads of the upper ram are generated, thereby causing a problem of shape error in microforming.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a dual servo press that optimizes processing efficiency and volume.

The dual servo press according to an embodiment of the present invention for realizing the object of the present invention includes a bolster in which a workpiece is placed, a slide for press-machining the workpiece in an upper portion of the bolster, and a driving unit for moving the slide in the vertical direction do. The drive unit includes a left drive unit and a right drive unit. The left drive unit includes a left drive unit disposed at one upper side end of the slide. The right drive unit includes a right drive unit disposed at an upper end of the upper surface of the slide so as to be symmetric with the left drive unit.

In one embodiment, the dual servo press may further include a body portion, and left and right cases. The body may have the slide positioned thereon. The left and right cases are respectively located at upper and both lateral ends of the body, and may cover the outside of the left and right driving parts, respectively.

In one embodiment, the left and right drive units may be symmetrical to each other.

In one embodiment, the left drive unit may include left first, second and third power transmission parts, and a left fourth power transmission part. The left first, second and third power transmission parts may be connected to the left driving part to transmit the driving force of the left driving part. The left fourth power transmission portion may be connected to the left third power transmission portion and may transmit the transmitted driving force in a vertical direction.

In one embodiment, the left first, second and third power transmitting portions may be disposed on the side of the left fourth power transmitting portion.

In one embodiment, the left first, second, and third power transmission portions may reduce the number of revolutions of the left driving portion.

In one embodiment, the left drive unit may include a left servo motor, a left drive shaft, and a left drive spur gear. Each of the left first, second and third power transmitting portions may include a left rotation shaft, a left spur gear, and a left pinion gear.

In one embodiment, the left rotation axes of the left drive shaft and the left first, second and third power transmission parts may extend parallel to each other.

In one embodiment, the left fourth power transmission portion may eccentrically rotate by the transmitted driving force to control a vertical stroke in a vertical direction.

In one embodiment, the left fourth power transmission portion includes a left fourth spur gear connected to the left third power transmission portion, a fourth rotation shaft serving as a rotation center of the left fourth spur gear, And a pair of first and second support shafts eccentrically coupled to the fourth rotation shaft.

In one embodiment, the left drive unit includes:

And a left power transmission plate connected to a lower portion of the left fourth power transmission portion and fixed to an upper surface of the slide.

According to the embodiments of the present invention, since the left and right drive portions of the dual servo presses are disposed at the ends of both sides, the space occupied by the entire dual servo presses can be minimized and a slim servo press can be manufactured .

In addition, since the slides are moved by a pair of left and right driving units symmetrical to each other, loads transmitted to the slides are relatively evenly distributed, so that a shape error due to an eccentric load can be minimized.

In addition, since the output of the servo motor is transmitted to the first to fourth power transmission parts, the number of rotations is reduced and the torque is increased through the multi-stage gear, so that a high torque can be generated without using a servo motor of large capacity and output .

Further, since the servo motors are disposed at both lateral ends, and the rotation axes of the first to fourth power transmission parts are arranged in parallel with each other, stable power transmission is possible and the eccentric load can be minimized.

Particularly, since the fourth power transmission portion simultaneously supports both sides of the fourth power transmission portion by the pair of first and second support shafts, the amount of eccentricity of the load during rotation of the fourth power transmission portion is minimized, 4 The durability of the power transmitting portion can be improved.

1 is a perspective view illustrating a dual servo press according to an embodiment of the present invention.
2 is a perspective view illustrating the driving unit of FIG.
3A and 3B are a perspective view and a plan view showing a part of the left drive unit in FIG.
4A and 4B are a perspective view and a front view showing the left fourth power transmitting portion of FIG. 2;

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from another. The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the term "comprises" or "comprising ", etc. is intended to specify that there is a stated feature, figure, step, operation, component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view illustrating a dual servo press according to an embodiment of the present invention.

Referring to FIG. 1, a dual servo press 10 according to an embodiment of the present invention includes an outer frame composed of a body portion 11, left and right cases 12 and 13, and a frame portion 14, And a driving unit 100 accommodated in the outer frame.

The dual servo press 10 includes a slide 15 disposed on the body 11, a bolster 18 disposed on a lower portion of the slide 15, And a display unit 19.

The body portion 11 corresponds to a central portion of the dual servo press 10 and is fixed by the frame portion 14. The slide 15 is disposed below the body portion 11. [

The left case 12 is located at the upper portion of the frame portion 14 and at the upper left end of the body portion 11. The left case 12 houses a left driving unit 210, which will be described later. The right case 13 is located at the upper portion of the frame portion 14 and at the upper right end of the body portion 11. The right case 13 houses a right driving unit 310 to be described later. That is, the left and right cases 12 and 13 are located at the upper and both side ends of the upper portion of the body portion 11 to minimize the size of the dual servo press 10, 10 have a slim structure as a whole.

The bolster 18 is equipped with a mold, a workpiece is placed thereon, and is fixed by the frame portion 14.

The slide 15 moves up and down with respect to the bolster 18 to press the workpiece and includes a guide portion 16 and a pressure plate 17. [

The guide part 16 and the pressure plate 17 are fixed to a driving part 100 to be described later and the guide part 16 guides up and down movement of the pressure plate 17, And presses the workpiece placed on the workpiece 18.

Meanwhile, the amount of eccentricity of the driving unit 100, which will be described later, can be displayed through the display unit 19.

Hereinafter, the driving unit 100 housed in the outer frame will be described in detail with reference to FIGS. 2 to 4B. FIG.

2 is a perspective view illustrating the driving unit of FIG. 3A and 3B are a perspective view and a plan view showing a part of the left drive unit in FIG. 4A and 4B are a perspective view and a front view showing the left fourth power transmitting portion of FIG. 2;

Referring to FIGS. 2, 3A, 3B, 4A and 4B, the driving unit 100 includes a left driving unit 200 and a right driving unit 300.

The left drive unit 200 includes a left drive unit 210, a left first power transmission unit 220, a left second power transmission unit 230, a left third power transmission unit 240, The right drive unit 300 includes a right drive unit 310, a right first power transmission unit 320, a right second power transmission unit 330, a right side power transmission unit 320, A third power transmission portion 340, a right fourth power transmission portion 350 and a right power transmission plate 360. [

2, the left drive unit 200 and the right drive unit 300 are arranged along the first direction D1 as a whole, and thus the drive unit (not shown) of the dual servo press 10 100 are formed to have an overall length along the first direction D1 longer than an overall length along the second direction D2 perpendicular to the first direction D1.

In general, the servo press is formed such that the slide 17 is elongated in the first direction D1 and relatively narrow in the second direction D2. Therefore, the driving unit 100 of the present invention is also relatively long along the first direction D1, which is the extension direction of the slide 17, so that the driving unit is formed relatively long along the second direction D2 The volume of the servo press as a whole can be reduced, and a servo press having a slim structure can be formed.

Particularly, in the case of the dual servo press 10 according to the present invention, a pair of servo motors used as a driving unit through the connection of the multi-stage gears are disposed at both side ends, . Therefore, compared to a servo press in which the volume of the servo motor is increased by positioning the servo motor at the rear of the slide 17 in order to transfer a large torque, a volume can be reduced to provide a sufficient torque with a slim structure .

2, the left and right drive units 200 and 300 have the same components, structures, and shapes, except that they are disposed symmetrically with respect to each other. Therefore, the components, structure, and shape of the left drive unit 200 will be described in detail below, and redundant description of the right drive unit 200 will be omitted.

The left driving unit 200 includes a left driving unit 210, a left first power transmitting unit 220, a left second driving force transmitting unit 230, a left third driving force transmitting unit 240, A fourth power transmission portion 250 and a left power transmission plate 260. [

Specifically, the left drive unit 210 includes a left servo motor 211, a left drive shaft 212, and a left drive spur gear 213. The rotational driving force generated by the left servo motor 211 is transmitted to the left driving spur gear 213 through the left driving shaft 212. The left drive shaft 212 extends parallel to the second direction D2.

In this case, the left servo motor 211 can output a relatively high rotational speed and a low torque driving force. However, the relatively high-speed and low-torque driving force thus outputted is transmitted through the left first, second, third, and fourth power transmission portions 220, 230, 240, And a driving force having a high torque.

Therefore, since the left servo motor 211 does not need to generate a high-torque driving force, it is possible to use a relatively small-capacity servo motor, thereby saving power consumption and production cost, .

The left first power transmitting portion 220 includes a left first rotation shaft 221, a left first spur gear 222, and a left first pinion gear 223. The left first spur gear 222 is engaged with the left driving spur gear 213 to receive a rotational force and the left first spur gear 222 is rotated by the left first rotation shaft 221 and the left first spur gear 222, The left first pinion gear 223 on the first rotary shaft 221 rotates.

The left first rotation shaft 221 extends in the second direction D2 in parallel with the left driving shaft 212. [

The left second power transmission portion 230 includes a left second rotation shaft 231, a left second spur gear 232, and a left second pinion gear 233. The left second spur gear 232 is engaged with the left first pinion gear 223 to receive a rotational force and the left second spur gear 232 is rotated by the left second rotation shaft 231 and the left second spur gear 232, The left second pinion gear 233 on the second rotation shaft 231 rotates.

In this case, since the left second spur gear 232 has a larger number of gear teeth than the left first pinion gear 223, the left second rotation shaft 231 has a lower rotation speed than the left first rotation shaft 221 And high torque.

The left second rotation shaft 231 extends in the second direction D2 in parallel with the left first rotation shaft 221. [

The left third power transmission portion 240 includes a left third rotational shaft 241, a left third spur gear 242, and a left third pinion gear 243. The left third spur gear 242 is engaged with the left second pinion gear 233 to receive a rotational force and the left third spur gear 242 is rotated by the left third rotational axis 241 and the left third spur gear 242, The left third pinion gear 243 on the third rotational shaft 241 rotates.

In this case, since the left third spur gear 242 has a larger number of gear teeth than the left second pinion gear 233, the left third rotation shaft 241 is rotated at a lower rotation speed than the left second rotation shaft 231 And high torque.

The left third rotary shaft 241 extends in the second direction D2 in parallel with the left second rotary shaft 231. [

The left fourth power transmission portion 250 includes a left fourth rotation shaft 251, a left first support shaft 252, a left second support shaft 253, a left base portion 254, a left extension shaft 255, A left fourth spur gear 256, a left eccentric setting portion 257, and a left eccentricity display portion 258. [

The left fourth spur gear 256 receives a rotational force in engagement with the left third pinion gear 243 and the left fourth rotational shaft 251 rotates in accordance with the rotation of the left fourth spur gear 256 . In this case, since the left fourth spur gear 256 has a larger number of gear teeth than the left third pinion gear 243, the left fourth rotary shaft 251 is rotated at a lower speed than the left third rotary shaft 241 And high torque.

As described above, the relatively high rotational speed and the low torque rotational force generated in the left driving part 210 are transmitted through the left first, second, and third power transmitting parts 220, 230, and 240, The torque is increased and finally transmitted to the left fourth rotary shaft 251 of the left fourth power transmitting portion 250. [

Meanwhile, the left fourth rotary shaft 251 extends in the second direction D2 in parallel with the left third rotary shaft 241. However, the eccentric amount of the left fourth rotary shaft 251 is set by the left eccentricity setting unit 257, and eccentric rotation is performed. The amount of eccentricity set by the left eccentricity setting unit 257 may be displayed externally to the display unit 19 through the left eccentricity display unit 258. [

As the left fourth rotary shaft 251 is eccentrically rotated, the third rotary shaft 251 is fixed to the left fourth rotary shaft 251 so as to be movable in the third direction D3 The left first and second support shafts 252 and 253 are moved in the vertical direction along the third direction D3.

At this time, since the left fourth rotary shaft 251 rotates at a relatively high torque, the left first and second support shafts 252 and 253 move along the third direction D3 with a relatively large force . The force in the third direction D3 applied to the left first and second support shafts 252 and 253 is transmitted through the left base portion 254 and the left extension shaft 255 to the left power transmission plate 250. [ So that the slide 15 receives a high pressing force.

The left first and second support shafts 252 and 253 are disposed on both sides of the left fourth spur gear 256 with the left fourth spur gear 256 interposed therebetween, And engages with the rotary shaft 251. The left base portion 254 is fixed to the left first and second support shafts 252 and 253 at the ends of the left first and second support shafts 252 and 253 at the same time. Further, the left extension shaft 255 extends to the lower portion of the left base portion 254 and is finally connected to the left power transmission plate 260.

Since the left first and second support shafts 252 and 253 are symmetrically coupled to both sides of the left fourth spur gear 256 in the present embodiment, The amount of eccentricity that may occur when the rotational force of the left power transmission plate 260 is transmitted to the lower left power transmission plate 260 can be minimized.

Since the left first and second support shafts 252 and 253 divide the load transmitted from the left fourth rotary shaft 251 to the left power transmission plate 260, the durability of each component is improved .

In addition, since the supporting force of the left fourth rotary shaft 251 can be maintained uniformly, the rotation accuracy of the left fourth rotary shaft 251 can be improved and the reliability thereof can be improved.

One end of the left power transmission plate 260 is connected to the left extension shaft 255 and the other end thereof is formed in a plate shape and fixed to the upper surface of the pressure plate 17 of the slide 15. In this case, the surface fixed to the upper surface of the pressure plate 17 is formed relatively wide, so that the load acting on the pressure plate 17 can be uniformly maintained.

Particularly, in this embodiment, not only the left power transmission plate 260 but also the end of the right power transmission plate 360 are fixed to the upper surface of the pressure plate 17 with a relatively large area, The applied load can be kept uniform as a whole, and the eccentric load can be minimized.

As described above, since the right drive unit 300 is symmetrical with the left drive unit 200, a duplicate description will be omitted.

However, the present embodiment may further include a separate control means (not shown) for synchronizing the operations of the left drive unit 200 and the right drive unit 300 so that the load applied to the pressure plate 17 as a whole The eccentric load can be minimized. In this case, the control means may further include an eccentricity measuring sensor attached to the pressure plate 17, and a control unit for controlling driving of the left and right driving units 200 and 300 by feeding back the measured values .

Further, although the power transmission parts of the driving part 100 include spur gears in the present embodiment, the spur gears used in the power transmission parts may be replaced with helical gears.

According to the embodiments of the present invention, since the left and right driving parts of the dual servo presses are disposed at the ends of both sides, the space occupied by the entire dual servo presses can be minimized, and a slim servo press Can be produced.

In addition, since the slides are moved by a pair of left and right driving units symmetrical to each other, loads transmitted to the slides are relatively evenly distributed, so that a shape error due to an eccentric load can be minimized.

In addition, since the output of the servo motor is transmitted to the first to fourth power transmission parts, the number of rotations is reduced and the torque is increased through the multi-stage gear, so that a high torque can be generated without using a servo motor of large capacity and output .

Further, since the servo motors are disposed at both lateral ends, and the rotation axes of the first to fourth power transmission parts are arranged in parallel with each other, stable power transmission is possible and the eccentric load can be minimized.

Particularly, since the fourth power transmission portion simultaneously supports both sides of the fourth power transmission portion by the pair of first and second support shafts, the amount of eccentricity of the load during rotation of the fourth power transmission portion is minimized, 4 The durability of the power transmitting portion can be improved.

The dual servo press according to the present invention has industrial applicability that can be used for press working of a workpiece.

10: Dual servo press 11: Upper case
12, 13: Left and right case 15: Slide
19: display part 100:
200: left drive unit 300: right drive unit
210, 310: Driving unit 220, 320: First power transmission unit
230, 330: second power transmitting portion 240, 340: third power transmitting portion
250, 350: Fourth power transmission portion 260, 360: Power transmission plate

Claims (11)

A dual servo press including a bolster in which a workpiece is placed, a slide for pressing the workpiece in an upper part of the bolster, a driving part for vertically moving the slide, and a control unit for controlling the driving part,
The driving unit includes:
A left drive unit including a left drive unit disposed at one upper side end of the slide; And
And a right drive unit disposed at an upper end of the upper surface of the slide so as to be symmetrical with the left drive unit.
The left driving unit is connected to the left first driving unit, the left first, second, and third power transmitting units that transmit the driving force of the left driving unit, and the left third driving force transmitting unit, And a left-side fourth power transmitting portion for transmitting the left-
The left fourth power transmission unit includes a left fourth spur gear that is connected to the left third power transmission unit, a left fourth rotation shaft that is a rotation center of the left fourth spur gear, and a left fourth spur gear, A pair of left first and second support shafts eccentrically coupled to the left fourth rotation shaft, and a pair of left and right first support shafts, And a base portion,
The left fourth spur gear is formed to have a larger radius so as to have more teeth than the gears included in the left first, second and third power transmission parts,
The pair of left first and second support shafts are symmetrically coupled to both sides of the left fourth spur gear to improve the rotation accuracy of the left fourth rotation shaft,
The left drive unit and the right drive unit transmit driving force to the slide independently of each other,
Wherein the control unit controls the driving of the left and right driving units by feeding back the eccentricity measured by the eccentricity measuring sensor attached to the slide. [2] The apparatus of claim 1, further comprising: a body portion on which the slide is disposed; And
Further comprising left and right cases respectively located at upper and both lateral ends of the body portion and covering the outside of the left and right driving portions, respectively. delete delete The dual servo press according to claim 1, wherein the left first, second and third power transmitting portions are disposed on a side of the left fourth power transmitting portion. The dual servo press according to claim 1, wherein the left first, second and third power transmission parts reduce the number of revolutions of the left driving part. 7. The automatic transmission according to claim 6, wherein the left drive unit includes a left servo motor, a left drive shaft, and a left drive spur gear,
Wherein each of the left first, second, and third power transmission portions includes a left rotation shaft, a left spur gear, and a left pinion gear. The dual servo press according to claim 7, wherein the left rotation axes of the left drive shaft and the left first, second and third power transmission parts extend parallel to each other. delete delete The image pickup apparatus according to claim 1,
And a left power transmission plate connected to a lower portion of the left fourth power transmission portion and fixed to an upper surface of the slide.

Images