JPH0743611U - Rolling cut shear device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rolling cut shear device having a simple structure, a small size, and capable of performing accurate shearing. [Structure] In a rolling cut shear device, a skid with a curved blade attached to an arc blade is hung up and down by a drive mechanism via a hinge mechanism, and the frame has a plate thickness at positions corresponding to both longitudinal ends of the skid. A direction guide is provided, and a single-curve guide mechanism consisting of a rolling element and a curved groove into which the rolling element is fitted is provided between the end plate thickness direction of the skid and the frame, and a front side of the frame is provided. Is provided with a reverse pressing mechanism in a relationship facing the arc blade.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a rolling cut shear device.

[0002]

[Prior art and its technical problem]

 As a shearing method for metal materials typified by thick plates, a guillotine cutting method, in which a straight blade is used as the upper blade and is moved up and down at an angle with respect to the horizontal, is known as a rolling cutting method. . In this rolling cutting method, since the upper blade with a curved surface rolls on the lower blade of a straight line to perform shearing, it is possible to freely change the vertical biting amount of the material, and therefore the break during shearing. Noise is reduced by eliminating slew, material bending, twisting, and camber can be reduced, and the total stroke is small, so a small crank radius is sufficient, driving rotational torque can be reduced, and stroke can be reduced. Therefore, it is advantageous in that the speed can be increased.

As shown in FIG. 19, a conventional rolling cut device suspends an upper blade 600 having an arcuate blade by two crank mechanisms 601 and 601 to obtain a predetermined movement locus on the upper blade 600. Rollers 603 and 603 are attached to both shoulders in the longitudinal direction of the blade, one roller 603 is brought into contact with a fixed guide 604 having an arc-shaped guide surface 605, and the other roller 603 is attached to the arc guide 606 at the tip of the piston rod. In contact with each other, the piston rod was expanded and contracted by the cylinder mechanism 607 so as to draw a cycloid line. However a double curve motion in this structure, many roller and just play because the contact with the arcuate surface, continuous motion precision is deteriorated, material deformation occurs easily for that point, a mechanism for regulating the tool movement path However, since the device becomes complicated and the device projects laterally, the device becomes large. The present invention has been devised to solve the above-mentioned drawbacks, and an object of the present invention is to provide a rolling cut shear device having a simple structure, a small size, and capable of performing accurate shearing. is there.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a straight blade and a curved blade on the side opposite to the straight blade, and in a device for shearing a work by rollingly moving the curved blade, the curved blade is an arc blade, The attached skid is lifted up and down by a drive mechanism via a hinge mechanism, and plate thickness direction guides are provided on the frame at positions corresponding to both longitudinal ends of the skid, so that the skid end plate thickness direction A single-curve guide mechanism consisting of a rolling element and a curved groove into which the rolling element is fitted is provided between the frame and the frame as a means for obtaining the trajectory of the rolling tool, and the reverse pressing mechanism is provided on the front side of the frame so as to face the circular arc blade. Is provided. A hydraulic cylinder or a cam is used as the drive mechanism. As the single curve guide mechanism, a structure in which a rolling element is provided on the frame and a curved groove into which the rolling element fits is provided on the skid is suitable. The reverse pressing mechanism preferably comprises a reverse pressing plate and means for urging the reverse pressing plate upward.

[0005]

[Action]

 When the drive mechanism is operated, the skid 5 to which the arc blade 6 is attached moves up and down, and the rolling motion locus of the circular arc blade follows the guide groove 103 provided on the front surface of the skid with the rolling element 101 on the frame side. Controlled by moving along. When rolling and shearing, the skid 5 is guided with both longitudinal ends fitted in the plate thickness direction guides 7a and 7b provided on the frame, so that the skid 5 moves up and down smoothly without rattling in the plate thickness direction. To be done. In addition, the guide mechanism 10 for obtaining the rolling motion locus of the circular arc blade has the curved groove 103 on the front surface of the end of the skid 5 and the rotor 101 protruding from the frame side and fitted into the curved groove 103, or the reverse mounting structure. It is possible to achieve more precision and downsizing than the conventional confronting guide using a cylinder and a circular arc. Especially, since there is no mechanism that protrudes greatly in the lateral direction of the frame, it is possible to downsize the device. it can . Further, instead of simply rolling and shearing the work with the circular arc blade 6 and the lower blade 2, the reverse pressing mechanism 11 is provided on the front side of the frame so as to face the circular arc blade 6, and the circular blade 6 is placed above the lower blade 2. When rolling, the reverse pressing plate 112 constantly pushes up the blank W from the lower side and lowers it horizontally, so that the work such as bending, twisting and camber deformation is further reduced, and the work piece can be precisely sheared.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 8 show an embodiment (first embodiment) using a hydraulic cylinder as a blade driving source. In FIG. 1, 1 is a frame installed on the base floor, and a lower blade 2 of a straight blade is fixed to the front edge portion. Reference numeral 3 denotes a crown provided upright on the frame 1, and two hydraulic cylinders 4a and 4b are attached to a ceiling portion of the crown 3 at a predetermined interval, as shown in FIG. As shown in FIGS. 4 and 6, the hydraulic cylinders 4a and 4b can be swung by a hinge mechanism 40 including a mounting seat and a pin. The piston rods 41a and 41b of the hydraulic cylinders 4a and 4b extend downward, and the skids (slides) 5 are swingably suspended by hinge mechanisms 42a and 42b. The hinge mechanisms 42a and 42b are, for example, as shown in FIGS. 4 and 6, a yoke 420 fixed to the piston rods 41a and 41b, a pin 421 penetrating the yoke 420 and the upper end of the skid 5, and an outer periphery of the pin 421 and the skid. And a spherical slide bearing 422 arranged between the holes.

In this embodiment, an arc blade 6 having a required curvature is fixed to the skid 5 as a top blade by a screw so as to be replaceable. On the frame corresponding to both sides of the skid 5 in the longitudinal direction, plate-thickness direction guides 7a and 7b having a groove-shaped cross section are provided, and both sides of the skid 5 are fitted to the plate-thickness direction guides 7a and 7b. The skid 5 can be raised and lowered without rattling in the plate thickness direction. Behind the skid 5, a plate retainer 8 is arranged as shown in FIGS. The mechanism of this plate retainer is arbitrary, but in this embodiment, both sides of the plate retainer 8 are arranged in a holding frame 80 provided in contact with the guides 7a, 7b in the plate thickness direction, and are urged upward by springs 81. In this state, the work W is fixed during shearing by being pressed by the piston rod extending from the upper hydraulic cylinders 82a and 82b.

Reference numeral 10 denotes a guide or a regulating mechanism (hereinafter referred to as a guide mechanism) for creating a rolling motion locus on the circular arc blade 6, which is provided between the frame 1 at the longitudinal end of the skid 5 and the frame 1. It is provided in. As shown in FIGS. 1 and 6, the guide mechanism 10 is provided with a mounting seat 100 at an upper edge portion of the frame 1 and a rotator 101 is rotatably mounted on the mounting seat 100, while a front surface of the skid 5 is bolted. The groove plate 102 is fixed, and the groove plate 102 is formed with a curved groove 103 on which the rolling element 101 rolls. This curved groove 103 forms a curve corresponding to a cycloid line. The rolling element 101 and the groove plate 102 may be mounted opposite to each other, that is, the rolling element 101 may be provided on the skid side and the groove plate 102 may be provided on the frame side. Reference numeral 11 denotes a reverse pressing mechanism, which is provided on the frame 1 so as to face the circular arc blade 6. As shown in FIG. 5, the reverse pressing mechanism 11 is composed of a reverse pressing plate 112 that can move up and down adjacent to the lower blade 2, and a means for urging the reverse pressing plate 112 upward. In this embodiment, an abutment 110 protruding from the front surface of the frame 1 is provided, and a plurality of support rods 111 are attached to this to support a reverse pressing plate 112, and a spring 113 is provided around the support rod 111 as an urging means. The urging force can be adjusted by an adjusting member 114 fitted in the abutment 110.

7 and 8 show a control system in this embodiment. FIG. 7 shows the hydraulic circuit 12 of the hydraulic cylinders 4a and 4b. The hydraulic circuit 12 includes a hydraulic pump 120 including a hydraulic pump, an accumulator 121 provided in a discharge passage from this point, and an oil passage 125 from the accumulator 12 1. It has servo valves 122a, 122b which are connected to each other to guide the pressure oil to the hydraulic cylinders 4a, 4b and control the stroke, and locking valves 123a, 123b arranged downstream of the servo valves 122a, 122b. There is. The locking valves 123a and 123b are provided with a two-position switching valve 1230 connected to the cylinder ports of the servo valves 122a and 122b and an electromagnetic two-position switching valve 1231 that moves the two-position switching valve 1231. The hydraulic pressure is guided by the branch passage 126 from the upstream side of the servo valves 122a and 122b. A branch passage 127 having a pressure reducing valve 431 and a switching valve 430 is connected from the oil passage 125, and is connected to the left and right hydraulic cylinders 82a and 82b so that the plate retainer 8 is moved up and down. .

FIG. 8 shows the shear control using the hydraulic circuit. An optimal stroke program according to the work material, plate thickness, etc. is built in the computer 13 in advance, and signals from this computer 13 are supplied to two systems. Is converted to a voltage by the D / A converters 130a and 130b of the servo amplifier and is sent to the servo amplifiers 131a and 131b, where it is converted to a current value and sent to the electromagnetic parts of the servo valves 122a and 122b. The flow rate is sent to the respective hydraulic cylinders 4a and 4b, the strokes S ₁ and S ₂ are controlled as illustrated in FIG. 17 (a), and the arc blade 6 is desired by the cooperation with the guide mechanism 10. Give a rolling exercise. The strokes S ₁ and S _{2 at} this time are fed back to the computer 13 by the position detectors 14a and 14b to correct the deviation. The position detectors 14a and 14b may be linear scales or the like as long as they can convert the distance into an electric quantity. In this embodiment, the hinge mechanisms 42a and 42b of the hinge mechanisms 42a and 42b as shown in FIGS. The detector 140 is attached to the pin 421, and the main body 141 is attached to the crown side.

9 to 13 show an embodiment (second embodiment) in which a cam mechanism is used as a blade driving source. In this embodiment, the first to third rotary shafts 15a, 15b, 15c are horizontally mounted on the crown 3. The first rotary shaft 15a is a drive shaft, which is rotated by a transmission mechanism 17 including a motor 16 and a clutch, and its motion is transmitted to the rotary shafts 15b and 15c by a gear system 18. The third rotating shaft 15c has a brake 150 at its end, and cams 19a and 19b and a cam 220 for pressing the plate are attached to the middle part. The cams 19a, 19b are formed in a predetermined shape so that the arc blade 6 can be given a predetermined locus as shown in FIG. 18 by a cycloid locus, and the followers 20a, 20b contacting the cams 19a, 19b are As shown in FIG. 11, it is attached to a frame 200, and rods 43a and 43b for suspending the skid 5 via hinge mechanisms 42a and 42b are connected to the frame 200. In the middle of the rods 43a and 43b, Overlap adjusting mechanisms 21a and 21b such as a screw type are provided.

FIG. 12 shows an arrangement of the skid 5 and the hinge mechanisms 42a and 42b, which has the same structure as that of FIGS. 4 and 6 of the first embodiment. Further, the crown 3 is provided with the hydraulic pump 22, and the cam shaft is engaged with the piston 225 of the hydraulic pump 22 via the spring 226 as shown in FIGS. 9 and 13, and the piston is driven by the driven cam 220. 225 descends and discharges pressure oil from the hydraulic pump 22, and the discharge oil is sent to the material pressing cylinders 23a and 23b on the crown side, and the material pressing 24 resists the spring 240. The work W is fixed by pressing it down. In the second embodiment, the lower blade 2, the skid 5, the plate thickness direction guides 7a and 7b, the guide mechanism 10, and the reverse pressing mechanism 11 are the same as those in the first embodiment, and the description thereof will be omitted. 14 and 15 show motion curves of the cams 19a and 19b and the hinge point in the cam drive system. In FIG. 14, the C line is the motion curve of the hinge point c on the blade, the H line is the locus of the end point h of the rod 43a when the cam is driven, the E line is the motion curve of the hinge point e on the blade, and the I line is the cam. It is the locus of the end point i of the rod 43b during driving.

[0013]

[Operation of the embodiment]

Since the present invention has the above-described structure, in the first embodiment, the work W is placed on the bed, and the hydraulic cylinders 4a and 4b are moved by a control system as shown in FIG. , (B) strokes S ₁ and S ₂ are given. In this way, the material presser 8 fixes the work W with a variable pressure through the pressure reducing valve 431 by the operation of the hydraulic cylinders 82a and 82b, and the work W is extended by the hydraulic cylinder 4a side with respect to the work W and the skid 5 and the arc. When the left end side of the blade 6 reaches the position where the plate thickness of the workpiece is several millimeters (the initial position in FIG. 16), then it is further lowered and shearing is started (FIG. 16), and then the hydraulic cylinder 4a side is shortened. At the same time, by rolling the hydraulic cylinder 4b side, rolling shearing continues (FIG. 16) and completes (FIG. 16). When the hydraulic cylinder 4b side is shortened, it returns to the initial position (FIG. 16) and stops. This completes one cycle. The rolling motion locus of the circular arc blade 6 at this time is controlled by the guide mechanism 10 in the plate thickness direction of the skid 5. That is, the rolling element 101 on the frame side is controlled by moving along the guide groove 103 on the front surface of the skid. Further, when the reverse pressing mechanism 11 is used, the counter pressure against the arcuate blade 6 acts on the work W, so that the deformation due to shearing is further suppressed.

In the second embodiment, when the first rotary shaft 15a as a drive shaft is driven, the gear system 18 rotates the third rotary shaft 15c, and the cams 19a and 19b operate the hydraulic pump 22. The material presser 24 operates to press the work W, and then, due to the two cam shapes, the arcuate blade 6 in the initial posture as shown in FIG. 18 moves downward on the shearing start side, and as shown in FIG. Roll on the lower blade 2 and shear. After shearing, the arcuate blade 6 returns to the initial posture and stops.

[0015]

[Effect of device]

 According to the first aspect of the present invention described above, the skid 5 having the arcuate blade 6 attached thereto is hung up and down by the drive mechanism through the hinge mechanism, and the frame 1 corresponds to both longitudinal ends of the skid 5. The thickness direction guides 7a and 7b are provided at positions where the rolling elements 101 and the curved groove 103 into which the rolling elements 101 are fitted are provided between the end plate thickness direction of the skid 5 and the frame as means for obtaining the rolling tool locus. Since the curved guide mechanism 10 is provided and the reverse pressing mechanism 11 is provided on the front side of the frame so as to face the circular arc blade 6, the skid 5 can be smoothly moved up and down without rattling in the plate thickness direction. When the arcuate blade 6 rolls on the lower blade 2 along the locus of rolling motion, the reverse pressing plate 112 pushes up the blank W from below and lowers it horizontally, so that the work bends, twists, camber, etc. Deformation is reliably prevented, it is possible to perform precise shear. Furthermore, since the guide mechanism 10 for obtaining the rolling motion locus of the circular arc blade is composed of the curved groove 103 and the rolling element 101 fitted in the curved groove 103, the guide mechanism can be simplified and Since the guide mechanism does not protrude in the width direction of the frame, it is possible to obtain excellent effects such as downsizing of the device.

According to the second aspect and the third aspect, since the circular arc blade is driven by the hydraulic cylinder or the cam and the hinge mechanism, it is possible to obtain an excellent effect that the degree of freedom of the stroke can be increased. According to claim 4, the excellent effect that the structure of the guide mechanism can be made simple and small is obtained. According to the fifth aspect, an excellent effect that the reverse pressing function can be realized with a simple and inexpensive structure is obtained.

[Brief description of drawings]

FIG. 1 is a rear view showing a first embodiment of the present invention.

FIG. 2 is a side view of the same.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.

5 is a cross-sectional view taken along the line VV of FIG.

6 is a cross-sectional view taken along line VI-VI in FIG.

FIG. 7 is an explanatory diagram showing a control hydraulic circuit of the first embodiment.

FIG. 8 is a flowchart showing a control system of the first embodiment.

FIG. 9 is a front view schematically showing a second embodiment of the present invention.

FIG. 10 is a perspective view of a blade portion in the second embodiment.

FIG. 11 is a perspective view showing an engagement between a cam and a cam follower in the second embodiment.

FIG. 12 is a partially cutaway side view showing an engagement between a rod and a skid in the second embodiment.

FIG. 13 is a side view showing an engagement between a cam and a hydraulic cylinder in the second embodiment.

FIG. 14 is a diagram showing motion curves of a rod and a hinge point when a cam is used as a drive source.

FIG. 15 is an explanatory diagram of each point in FIG.

FIG. 16 is an explanatory diagram showing a locus of a blade when a hydraulic cylinder is used as a drive source.

FIG. 17 is a stroke diagram when a hydraulic cylinder is used as a drive source.

FIG. 18 is an explanatory diagram showing a locus of a blade when a cam is used as a drive source.

FIG. 19 is a schematic explanatory view of a conventional rolling cut shear.

[Explanation of symbols]

 1 Frame 2 Lower Blade 4a, 4b Hydraulic Cylinder 5 Skid 6 Arc Blade 7a, 7b Plate Thickness Direction Guide 10 Guide Mechanism 11 Reverse Press Mechanism 101 Roller 103 Curved Groove 112 Reverse Press Plate

Claims (5)

[Scope of utility model registration request] 1. An apparatus having a straight blade and a curved blade on the side opposite to the straight blade, wherein the curved blade is a circular arc blade and the work is sheared by rolling the curved blade, and the skid to which this is attached is hinged. While being lifted up and down by a drive mechanism through the mechanism, the frame is provided with plate thickness direction guides at positions corresponding to both longitudinal ends of the skid.
Between the end plate thickness direction of the skid and the frame, a single-curve guide mechanism composed of a rolling element and a curved groove into which the rolling element fits is provided as a means for obtaining the locus of the rolling blade, and the circular arc blade is provided on the front side of the frame. A rolling cut shear device characterized in that a reverse pressing mechanism is provided so as to face it. 2. The rolling cut shear device according to claim 1, wherein the drive mechanism is a hydraulic cylinder. 3. The rolling cut shear device according to claim 1, wherein the drive mechanism is a cam. 4. The rolling cut shear device according to claim 1, wherein the rolling element is provided on the frame, and the curved groove into which the rolling element fits is provided on the skid. 5. The rolling cut shear device according to claim 1, wherein the reverse pressing mechanism comprises a reverse pressing plate and means for urging the reverse pressing plate upward.