KR100550959B1 - Synchronous system of hydraulic press brake machine - Google Patents

Abstract

The present invention relates to a synchronization system for maintaining and adjusting the left and right tuning of the ram operating up and down by a plurality of hydraulic cylinders, and more specifically, the vertical and horizontal slides (up and down) at the center of the ram plate (7) 70 and 71, and the upper and lower guide holes 10 and 10 'provided with guide rolls 13 and 13 for guiding the slides 70 and 71 to the fixing beam 1, Elevating guide means (100) for guiding the elevating operation of the ram plate (7) vertically; The upper guide 10 is rotatably supported by the shaft pin 12, and horizontally shot on the adjustment touch bar 20, 20 'coupled to the touch bolt 21 protrudes vertically at both ends thereof. The fixed installation, but the bottom of the touch bolt 21 of the adjustment touch (20) (20 ') fixed to the balance valve 50, 50' connected to the left and right hydraulic cylinders (5) (5 ') by the ram According to the eccentricity of the plate 7, the touch bolt 21 of the adjusting touch table 20, 20 'presses and presses the balance valves 50 and 50' to the left and right hydraulic cylinders 5 and 5 '. By providing a synchronous system of the hydraulic bending machine having an eccentric adjustment means 200 to adjust the eccentricity by adjusting the flow rate, it prevents the eccentric operation of the ram plate in advance, and when the eccentric occurs, it is quickly adjusted by using a hydraulic valve It is characteristic not only to prevent malfunction, but also to maximize operation efficiency.

Bending Machine, Hydraulic Cylinder, Tuning, Lift Guide, Eccentric Control, Slide, Balance Valve

Description

Synchronization system of hydraulic bending machine {SYNCHRONOUS SYSTEM OF HYDRAULIC PRESS BRAKE MACHINE}

1 is a front view showing a bending machine to which the present invention is applied;

2 is a front view of main parts of the present invention;

3 is an enlarged view illustrating main parts of FIG. 2;

4 is a plan view of main parts of the present invention;

5 is a side view of main parts of the present invention;

6A and 6B are cross-sectional views showing a balance valve of the present invention.

* Description of the symbols for the main parts of the drawings *

5,5 ': hydraulic cylinder 7: ram plate

10,10 ': upper and lower guide 12: shaft pin

13: guide roll 20,20 ': touch bar

21: Touch bolt 50,50 ': Balance valve

55: piston 53,54: input / output port

62: return spring 60: support bolt

65: stop bolt 100: lifting and lowering guide means

200: eccentric adjustment means

The present invention relates to a tuning system for maintaining and adjusting the left and right tuning of the ram operating up and down by a plurality of hydraulic cylinders, and more specifically, the ram plate is mechanically horizontal and at the same time eccentric of the ram plate The present invention relates to a tuning system for a hydraulic bending machine, which automatically detects the load and controls the oil supply amount of the hydraulic cylinder to automatically adjust the eccentricity of the ram plate.

In general, in the case of a device for raising and lowering the ram by two or more cylinders, such as a bending machine, the left and right synchro, which the left and right are raised and lowered horizontally, is required for precise and accurate processing.

For this reason, in the related art, a system for compulsoryly maintaining the ram horizontally or operating a hydraulic system that detects the eccentricity of the ram (left and right hydraulic cylinders) and controls the flow rate supplied to the left and right hydraulic cylinders is used. As described above, the former is a method of preventing the eccentric operation of the ram in advance, and the latter is a method of operating the correction later.

Therefore, the former method has a problem that the right and left tuning of the ram cannot be obtained by the effect because it cannot be corrected during the eccentric operation of the ram, thereby causing a machining defect, and the latter method does not delay the eccentric operation of the ram. Because it occurs frequently without minimizing, there is a problem such as reducing the processing efficiency while frequent operation to correct this.

In particular, in the above-described method of detecting the eccentricity of the ram, in recent years, the eccentricity of the ram is detected by a mechanical structure, and a simple structure tuning system that horizontally adjusts the ram by controlling the flow rate of the left and right hydraulic cylinders according to the detected displacement. Is being disclosed.

In more detail, as in Patent Registration No. 10-0311644, the horizontal bar is connected to the rod ends of both hydraulic cylinders, and the first rod having the upper end fixed to the lower center thereof is coupled to detect displacement of both hydraulic cylinders. Displacement detection means; A second rod inclined in a direction opposite to the first rod as the first rod is inclined to form a long hole into which the lower end of the first rod is fitted so that the first rod can be lowered with the rod of the hydraulic cylinder; It is composed of a control valve for controlling the flow rate to be supplied to both hydraulic cylinders while adjusting the cross-sectional area of the input and output port as the second rod is inclined.

In such a synchronization system, the horizontal bar connecting the rod end is inclined during the eccentric operation of both hydraulic cylinders, whereby the first rod fixed at the center of the horizontal bar is inclined to correspond to the eccentric amount. Rotate the second rod is guided.

At this time, the rotation angle of the second rod is operated to correspond to the eccentric amount.

As described above, the second rod rotates to operate the control valve connected to the lower end thereof to adjust the cross-sectional area of the input / output port to adjust the flow rate supplied to both hydraulic cylinders, thereby correcting the eccentricity of the both hydraulic cylinders.

However, the synchronization system is a structure that connects the horizontal bar to the left and right hydraulic cylinder rod ends, which is difficult to be applied to an actual bending machine as well as difficult to operate sensitively to the eccentricity of the hydraulic cylinder. Since the flow rate to the cylinder is controlled, there is a problem of malfunction.In addition, the cross-sectional area passing through the input / output ports is gradually reduced and reduced according to the eccentricity of the left and right hydraulic cylinders, thereby gradually adjusting the flow rate to the left and right hydraulic cylinders. There was a problem that the workability is very poor because the correction is not made quickly.

The present invention was created to fundamentally solve all the problems of the prior art, and prevents the eccentric operation of the ram plate in advance, and at the same time to adjust it when the eccentric load of the ram plate prevents eccentric operation as well as eccentric operation The purpose is to prevent the malfunction and to maximize the efficiency of the work by enabling the adjustment of the.

In addition, the present invention is to detect and adjust the eccentric load generation of the ram plate by a simple structure to effectively detect and adjust the purpose of maximizing reliability in use.

The object of the present invention is to vertically install the upper and lower slides in the upper and lower portions of the center of the ram plate to move up and down, and the upper and lower guides provided with a guide roll for guiding the slide to the fixed beam to vertically ram plate Elevating guide means for guiding elevating operation; The upper guide is rotatably supported by the shaft pin, and horizontally fixedly installs the adjusting touch bar which is combined so that the touch bolts protrude vertically on both sides thereof, and the left and right hydraulic cylinders are installed at the lower end of the touch bolt of the adjusting touch bar. Tuning of the hydraulic bending machine having eccentric adjustment means for adjusting the eccentricity by fixedly installing the connected balance valve and adjusting the flow rate supplied to the left and right hydraulic cylinders by pressing and touching the balance valve according to the eccentricity of the ram plate. Achieved by the system.

Hereinafter, a preferred embodiment for achieving the above object of the present invention will be described in detail with reference to the accompanying drawings.

That is, the present invention is shown in Figures 1 to 4,

The die 3 is fixedly installed at the upper end of the lower work platform 2, and punched at the lower end of the ram plate 7 by the hydraulic cylinders 5 and 5 'provided at the upper and lower sides of the beam 1, respectively. 8), in which the displacement caused by the eccentric operation of the ram plate 7 is detected to automatically adjust and adjust the flow rate supplied to the left and right hydraulic cylinders 5 and 5 '.

The ram plate 7 is fixed to the upper and lower slides 70 and 71 in the longitudinal direction, and the beam 1 guides the slides 70 and 71 of the ram plate 7 to the upper and lower parts. Lifting and lowering guide means (100) for guiding the vertical operation of the ram plate (7) by having a pair of guide rolls (13) and (13) provided with upper and lower guide holes (10, 10 '),

The upper guide 10 is rotatably installed on the beam (1) by the shaft pin 12, and the adjustment touch is screwed so that the touch bolt 21 protrudes vertically on both ends of the guide (10). Balanced installation unit 50 is fixedly installed horizontally (20, 20 '), and connected to the left and right hydraulic cylinders (5) and 5' at the lower end of the touch bolt 21 of the adjustment touch (20) and (20 '). 50 ') is fixed and the touch bolt 21 of the adjusting touch stand 20, 20' presses and balances the balance valves 50 and 50 'according to the eccentricity of the ram plate 7. It is provided with an eccentricity adjusting means 200 for adjusting and adjusting the flow rate supplied to the hydraulic cylinder (5) (5 ').

At this time, the balance valve 50, 50 'is installed in the body 51, the inner working chamber 52 to protrude upward to the piston 55 to move up and down by the touch bolt 21, the body The flow paths of the input and output ports 53 and 54 are formed in communication with the input and output ports 53 and 54 on the 51 so as to move downward by the pressure of the piston 55. It is configured to regulate the flow rate by blocking the flow.

In addition, the upper part of the adjustment touch (20, 20 ') is supported by the return spring 62 on the beam (1) and the end of the support bolt screwed to the adjustment touch (20) (20') 60 and a stop bolt 65, which is screwed onto the beam 1 to limit the upward movement of the adjustment touch stages 20, 20 '.

In addition, a lower cylinder 16 is provided on the beam 1 for the lower return operation of the ram plate 7 below the upper slide 10.

As the reference numeral 15, 15 is a cylinder rod of the rising cylinder 16, 56 is a projection jaw for supporting the piston 55 of the balance valve 50, 50 'to prevent the upper side, 57 is a drain port, 58 is It represents a spring for returning the pressurized piston 55 to the top.

Next will be described the operation and action of the present invention configured as described above.

As the bending machine to which the present invention is applied, as shown in FIGS. 1 and 2, the punch 8 at the bottom of the ram plate 7 dies by the lifting operation of the ram plate 7 by the left and right hydraulic cylinders 5, 5 ′. (3) The upper workpiece is press-molded.

At this time, the ram plate 7 is able to cause an eccentric operation during the lifting operation.

In the present invention, the ram plate (7) by the lifting and lowering guide means 100 to move up and down uniformly to prevent the eccentric operation in advance, as well as eccentric adjustment means when the eccentric load of the ram plate (7) (200) to adjust.

To describe this operation in more detail, the ram plate (7) of the upper and lower guides (10, 10 ') installed in the upper and lower portions of the beam (1), the slide 70, 71 installed in the longitudinal direction of the center The guide rolls 13 and 13 are guided by the lifting and lowering operation.

In other words, the ram plate 7 is guided to the guide rolls 13 and 13 at the upper and lower parts, and ascends and descends, thereby maintaining the horizontality of the ram plate 7 as well as smoothly providing the lifting operation.

In addition, under the upper slide 10, a lift cylinder 16 for a lift return operation of the ram plate 7 is installed on the beam 1 to assist the lift return operation of the ram plate.

On the other hand, when the elevating operation of the ram plate 7 as described above can be finely operated eccentric to the ram plate, in this case it is automatically adjusted.

This causes the upper guide 10 for guiding the upper slide 70 of the ram plate 7 to rotate left or right about the shaft pin 12 in the eccentric direction during the eccentric operation of the ram plate 7. do.

By rotating the upper guide 10, the outer side of the adjusting touch stand 20, 20 'is rotated downward in a horizontal state so as to protrude perpendicularly to both ends of the adjusting touch stand 20, 20'. The combined touch bolt 21 is lowered.

That is, one side of the touch bolt 21 of the adjustment touch 20, 20 'is lowered.

At this time, the downwardly operated adjusting touch table 20, 20 'is elastically rotated while tensioning the return spring 60 supported on the beam (1).

In addition, the touch bolt 21 rotates at a point spaced apart from the center of the ram plate 7 by the adjusting touch pads 20 and 20 ', thereby increasing the amount of eccentricity, that is, displacement of the ram plate 7. It is sensitive to eccentricity.

In this way, the touch bolt 21 of the adjusting touch table 20 and 20 which is operated to descend is pressurized to operate the piston 55 of the balance valves 50 and 50 'at the lower portion thereof.

At this time, the touch bolt 21 of the adjustment touch table 20, 20 'of the downwardly eccentric position of the ram plate 7 is lowered to pressurize and touch the balance valves 50 and 50' below. Of course.

As such, the piston 55 of the valve pressurized by the touch bolt 21 descends while blocking the flow path between the inlet / outlet ports 53 and 54 of the valve and the operation chamber 51, so that the hydraulic cylinder on the side eccentrically downwards. The flow rate supply to (5) (5 ') is cut off, whereby the eccentricity of the ram plate 7 is quickly and automatically adjusted.

As such, when the ram plate 7 is horizontally adjusted, the downwardly eccentric ram plates 20 and 20 'are quickly returned to their original positions by the elastic force of the return spring 60 and the pressurized balance valve. As the piston 55 of the 50 and 50 'rises, the flow paths of the input / output ports 53 and 54 and the operation chamber 51 communicate with each other so that the flow rate is simultaneously supplied to the hydraulic cylinders 5 and 5'. Ascending and descending of the ram plate 7 is to be made continuously.

On the other hand, the left and right synchronization system of the present invention is not limited to the hydraulic bending machine of the above-described embodiment, it is applied to achieve the right and left synchronization in the hydraulic press or other hydraulic molding apparatus to perform precise and accurate molding work It should be noted that such a simple change of use belongs to the scope of the present invention.

As described in detail above, in the tuning system of the present invention, the ram plate is guided by a plurality of guide rolls on the upper and lower sides, and the lifting operation is performed simultaneously with mechanical detection of the eccentricity of the ram plate and the flow rate supplied to the hydraulic cylinder. Because it is controlled quickly and automatically adjusted, it prevents eccentric operation and adjusts it quickly when an eccentric occurs, thereby preventing malfunction and maximizing the efficiency of operation.

Claims (3)

The die 3 is fixedly installed at the upper end of the lower work platform 2, and punched at the lower end of the ram plate 7 by the hydraulic cylinders 5 and 5 'provided at the upper and lower sides of the beam 1, respectively. 8), in which the displacement caused by the eccentric operation of the ram plate 7 is detected to automatically adjust and adjust the flow rate supplied to the left and right hydraulic cylinders 5 and 5 '. The ram plate 7 is fixed to the upper and lower slides 70 and 71 in the longitudinal direction, and the beam 1 guides the slides 70 and 71 of the ram plate 7 to the upper and lower parts. Lifting and lowering guide means (100) for guiding the vertical operation of the ram plate (7) by having a pair of guide rolls (13) and (13) provided with upper and lower guide holes (10, 10 '), The upper guide 10 is rotatably installed on the beam (1) by the shaft pin 12, and the adjustment touch is screwed so that the touch bolt 21 protrudes vertically on both ends of the guide (10). Balanced installation unit 50 is fixedly installed horizontally (20, 20 '), and connected to the left and right hydraulic cylinders (5) and 5' at the lower end of the touch bolt 21 of the adjustment touch (20) and (20 '). 50 ') is fixed and the touch bolt 21 of the adjusting touch stand 20, 20' presses and balances the balance valves 50 and 50 'according to the eccentricity of the ram plate 7. And a eccentric adjustment means (200) for adjusting and adjusting the flow rate supplied to the hydraulic cylinders (5) (5 '). The method of claim 1, The balance valve 50, 50 ′ is installed to protrude upward from the piston 55, which moves up and down by the pressure of the touch bolt 21, in the operation chamber 52 of the body 51. The flow paths of the input and output ports 53 and 54 are formed in communication with the input and output ports 53 and 54 on the 51 so as to move downward by the pressure of the piston 55. The tuning system of the hydraulic bending machine, characterized in that made to block the flow rate. The method of claim 1, The support bolt 60 is elastically supported on the beam (1) by the return spring 62 on the top of the adjustment touch (20, 20 ') and screwed to the adjustment touch (20) (20') at the end thereof. And a stop bolt (65) coupled to the beam (1) to limit upward movement of the adjustment touch table (20) (20 ').

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