JP2602116Y2 - Rolling cut shear device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling cut shear device.

[0002]

2. Description of the Related Art As a method of shearing a metal material represented by a thick plate, a rolling cut method of rolling an upper blade having a curved surface with respect to a straight lower blade to perform shearing is known. As a device for that purpose, Japanese Utility Model Laid-Open No. 3-367
No. 12 is known. In this prior art,
As shown in FIG. 5 (a), an arc blade 101 is fixed to a slide 100, and a cylinder 102 is provided on the slide 100 on a crown side (not shown) as a blade driving mechanism.
Racks 103, 103 are provided on pistons projecting from the gears 02, 02 and gears 104, 1 meshing with the racks 103, 103.
A cam 105, 105 having a shape capable of giving a cycloid locus to the arc blade is provided on the output shaft of 04, a follower 106, 106 is brought into contact with the cam 105, 105, and one or both sides of the frame are provided. A linear or curved groove-shaped guide mechanism 107 is provided, and a trajectory as a rolling blade is obtained by moving the rolling element 110 on the frame side along the groove-shaped guide mechanism 107. In the prior art, as another example, two left and right hydraulic cylinders 108, 108 are mounted on a crown (not shown) as shown in FIG.
9 and 109 are pivotally attached to the slide 100, and a linear or curved groove-shaped guide mechanism 107 is provided on one side of the frame, and the rolling element 110 on the frame moves along this to obtain a trajectory as a rolling blade. Was like that.

In this prior art, a conventional rolling cut device, that is, an upper blade having an arc blade is suspended by a crank mechanism, rollers are provided at shoulders at both ends of the upper blade, and one of the rollers is brought into contact with a fixed guide. The movement accuracy is better than that in which the other roller is brought into contact with an arc guide projecting from the side cylinder mechanism in the state, and there is an advantage that the size can be reduced because the device does not project to the side. . However, the prior art requires a cam and a hydraulic cylinder or a hydraulic cylinder as a blade driving mechanism, and also requires a groove-shaped guide and a rolling element. As a result, the number of components of the drive system increases due to complicated hydraulic equipment such as hydraulic pumps and switching valves, and piping, and maintenance and inspection must be performed frequently as usual when hydraulic equipment is used, resulting in an increase in cost. was there.

The present invention has been devised in order to solve the above-mentioned problems, and an object thereof is to realize a precise shearing by giving a rolling motion locus to an arc blade by a simple and low-cost structure. An object of the present invention is to provide a rolling cut shear device that can be used.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an apparatus for shearing a workpiece by rolling a circular blade having a straight blade and an arc blade opposed thereto, and having a front edge. An upper frame is provided on the upper side of the lower frame to which the linear lower blade is fixed, and an arc blade as the upper blade is fixed at the lower part, and a skid having an arc-shaped guide surface on the upper surface,
While being suspended from the upper frame by a plurality of suspension mechanisms, a roller mechanism is provided between the skid and the upper frame, the roller mechanism including a roller in contact with the arc-shaped guide surface of the skid and capable of linearly moving in the left-right direction. The skid is sequentially swung from one end to the other end against the traction force of the suspension mechanism by linear movement in the left-right direction to obtain a rolling motion trajectory of the arc blade. As a means for linearly moving the roller mechanism in the left-right direction, a screw mechanism, a gear mechanism, or the like is preferable.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show a first embodiment of a rolling cut shear device according to the present invention, wherein 1 is a lower frame installed on a base floor, and a linear lower blade 2 is fixed to a front edge portion. . Reference numeral 3 denotes an upper frame fixed above the lower frame 1, and the upper frame 3 has a concave groove 3 in the width direction.
0 is provided, and a screw shaft 4 typified by a ball screw is arranged in the concave groove. Both ends of the screw shaft 4 are supported by bearings 40, 40, and a transmission mechanism 41 such as a sprocket or a pulley is attached to one end of the screw shaft 4.
The output of the reversible rotation type motor 5 attached to the upper frame 3 is guided to the transmission mechanism 41 via the speed adjustment mechanism 50 so that the motor 5 is rotated at a predetermined speed.

Reference numeral 6 denotes a skid whose upper half is located below the concave groove 30, and an arc blade (including an approximate elliptical shape) 9 having a predetermined curvature as an upper blade is replaceable by a screw at a lower portion. Attached to. The skid 6 is suspended in a hollow shape by the upper frame 3 at least at two places in the left and right directions in the width direction via suspension mechanisms 7, 7 '. Suspension mechanism 7,
Numeral 7 'is a means for guaranteeing the rolling motion of the skid 6 in cooperation with a roller mechanism described later. In this embodiment, a pair of springs is used. Arranged on both sides of the screw shaft 4, the upper end portion is provided with the concave groove top wall 3 via the lifting strength adjusting means 70, 70.
1 and a lower end thereof is connected to the skid 6. The suspension mechanisms 7, 7 'may be hydraulic cylinders such as air or hydraulic pressure, as described later, and the suspension position may be inside the entire length of the arc blade 9, or may be smaller than the entire length of the arc blade. It may be an outer position.

As shown in FIG. 1, the skid 6 is slightly lowered toward both ends in the longitudinal direction toward the end.
0, 60 ′ are provided between the end guide surfaces 60, 60 ′, and the arc-shaped guide surface 6 having a curvature substantially coinciding with the curvature of the arc blade 9.
1 is provided. The end guide surfaces 60, 60 'are also preferably not curved surfaces but curved surfaces. End guide surface 6
The 0, 60 'and the arc-shaped guide surface 61 may be provided directly on the upper surface of the skid, or may be fixed to the skid 6 in a separate member, for example, in a bracket shape, which is also a concept of the skid upper surface of the present invention. include.

Reference numeral 8 denotes a roller mechanism disposed between the upper frame 3 and the skid 6 and capable of linearly moving in the left-right direction. The roller mechanism 8 is disposed in the concave groove 30, and
And a plurality of sets of upper rollers 82 which are rotatably mounted on the guide plate 31 provided along the top wall of the concave groove at the upper portion so as to be freely rotatable. A roller 83, which is in contact with the upper surface of the skid, is rotatably attached to the roller 83.

FIGS. 3 and 4 show a second embodiment of the present invention. In this embodiment, a gear mechanism is used instead of the screw mechanism as the horizontal linear movement means of the roller mechanism 8.
That is, a rack 33 integral with or separate from the guide plate 31 is fixed along the top wall of the recessed groove 30, and a plurality of sets of upper rollers 82 that are in rolling contact with the guide plate 31 are rotatably attached to the holder 80. A gear 34 meshing with the rack 33 is mounted between the upper rollers 82, 82, and the gear 34 is driven and rotated by a reversible motor 35 with a speed reducer mounted on a holder 80. Preferably, the holding member 80 is provided with a bearing 84, and the guide shaft 4 extends along the recessed groove 30 in the bearing 84 and is supported by the bearing near both ends.
0 is penetrated. If necessary, the reversible motor 35
A balance weight is provided on the side opposite to the mounting portion of the. In this embodiment, a fluid pressure cylinder is used as the suspension mechanisms 7, 7 ', but a spring may be used as in the first embodiment.

In some cases, one roller or a plurality of coaxial rollers is not divided into the upper roller 82 and the roller 83, and the upper surface of the roller is rolled into contact with the lower surface of the upper frame or the guide plate, and the lower surface is formed on the upper surface of the skid. It may be made to roll contact. In addition, in the drawings, reference numeral 10 denotes a plate holder attached to the upper frame 3 behind the skid 6. Although not shown, it is preferable to provide a reverse pressing mechanism on the lower blade side so as to face the arc blade 9.

[0012]

Next, the operation and operation of the apparatus shown in the first embodiment will be described. The skid 6 is constantly suspended by suspension mechanisms 7, 7 '. In the initial position, the roller mechanism 8 is at the left end as shown in FIG.
Are in contact with the guide plate 31 of the top wall of the recessed groove, and the roller 83 is in elastic contact with the end guide surface 60 of the skid 6, so that the arc blade 9
Is lowered on the left end side as long as it does not contact the work W. If the motor 5 is driven in this state, the screw shaft 4 rotates via the speed adjusting mechanism 50, and the rotation is transmitted to the female screw member 81 incorporated in the roller mechanism 8, so that the roller mechanism 8
Moves linearly rightward as shown in FIG. With this, the roller 83 rides on the end guide surface 60 and reaches the arc-shaped guide surface 61, whereby the skid 6 swings counterclockwise against the pulling force of the suspension mechanism 7 on the left end side by the wedge effect, Shearing is started by the arc blade 9.

When the roller mechanism 8 continues to move rightward, the contact position between the roller 83 and the arcuate guide surface 61 moves, so that the skid 6 rolls and the roller 83 moves on the arcuate guide surface 61. After the middle point, the one suspension mechanism 7 contracts and the other suspension mechanism 7 'is extended, so that the skid 6 starts swinging clockwise during the shearing as shown in FIG. 1 (c). When the rolling shear continues and the roller 83 reaches the end guide surface 60 ′ from the arc-shaped guide surface 61, the pushing force is reduced, and the arc blade 9 does not contact the workpiece W as shown in FIG. At the limit, the right end side is lowered, and the shearing is completed. Thus, one cycle of shearing is completed, and then when the motor 5 rotates in the reverse direction, the roller mechanism 8
Starts moving leftward from the position shown in FIG. 1 (d), and shearing is performed from the opposite direction.

In the second embodiment, when the reversible motor 35 is driven, the gear 34 rotates, and the gear 34 meshes with the rack 33 fixed to the top wall of the recessed groove. 1B and 1D, the skid 6 swings by the roller 83. In the second embodiment, since there is no need to provide motors on the upper frame 3 side, the structure of the upper frame can be simplified.

[0015]

According to the first aspect of the present invention described above, an upper frame 3 is provided above a lower frame 1 having a straight lower blade 2 fixed to a front edge portion, and an arc blade as an upper blade is provided below. 9, a skid 6 having an arc-shaped guide surface 61 on the upper surface is provided with a plurality of suspension mechanisms 7,
7 ′, a roller mechanism 8 is provided between the skid 6 and the upper frame 3 and is provided with a roller 83 that is in contact with the arc-shaped guide surface 61 of the skid 6 and is capable of linearly moving in the left-right direction. Since the skid 6 is sequentially swung from one end to the other end against the traction force of the suspending mechanisms 7 and 7 ′ by the horizontal linear movement to obtain the rolling motion trajectory of the arc blade 9, a simple and small mechanical structure is obtained. As a result, a precise rolling cut can be performed, and the number of parts is small, and high processing accuracy is not required. Therefore, an excellent effect such as a low-cost apparatus can be obtained. According to the third and fifth aspects, since there is no need to provide motors on the upper frame 3 side, an excellent effect that the structure of the upper frame can be simplified can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of a rolling cut shear device according to the present invention in a shearing process, (a) is an initial state before the start of shearing, (b) is a shearing start state, and (c) is a shearing state. The state in the middle of the shearing, (d) shows the state in which the shearing is completed.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a front view showing a second embodiment of the present invention.

FIG. 4 is a sectional view taken along the line III-III in FIG. 3;

FIG. 5 is a perspective view of a conventional rolling cut shear device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower frame 2 Lower blade 3 Upper frame 4 Screw shaft 6 Skid 7, 7 'Suspension mechanism 8 Roller mechanism 9 Arc blade 33 Rack 34 Gear 35 Motor 60, 60' End guide surface 61 Arc guide surface 81 Female screw member 82 Upper Roller 83 Roller

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yukio Kishimoto 555, Mizonohira, Fujinomiya-shi, Shizuoka Pref.Amino Co., Ltd. References Hira 3-36712 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23D 15/08 B23D 15/12 B23D 17/02

Claims (5)

(57) [Scope of request for utility model registration] An apparatus for shearing a workpiece by rolling a circular blade having a straight blade and a circular blade facing the linear blade, wherein an upper side of a lower frame having a linear lower blade fixed to a front edge thereof. An upper frame 3 is provided, and an arc blade 9 as an upper blade is fixed at a lower portion, and a skid 6 having an arc-shaped guide surface 61 on the upper surface is suspended from the upper frame 3 by a plurality of suspension mechanisms 7, 7 '. At the same time, between the skid 6 and the upper frame 3, the arc-shaped guide surface 6 of the skid 6
1 is provided with a roller mechanism 8 which is provided with a roller 83 in contact with 1 and is capable of linearly moving in the left-right direction. A rolling cut shear device characterized in that the rolling motion locus of the arc blade 9 is obtained by swinging. 2. The rolling cut shear device according to claim 1, wherein the means for linearly moving the roller mechanism 8 is a screw mechanism. 3. The rolling cut shear device according to claim 1, wherein the means for linearly moving the roller mechanism 8 is a gear mechanism. 4. A screw shaft 4 is laid under the upper frame 3, while a roller mechanism 8 is provided with a female screw member 81 screwed to the screw shaft 4, and a roller 83 and an upper surface in contact with a guide surface of the upper frame 3. 3. A roller 82, wherein end guide surfaces 60 and 60 'are provided on both sides of the arc-shaped guide surface 61 on the upper surface of the skid 6, and the roller 83 comes into contact with the guide surfaces. The rolling cut shear device as described. 5. The rack 33 is fixed to the upper frame 3, while the roller mechanism 8 includes a gear 34 engaging with the rack 33, a motor 35 for driving the gear 34, rollers 83 and the upper frame 3.
And an upper roller 82 in contact with the guide surface of the
The end guide surfaces 6 on both sides of the arc-shaped guide surface 61
The rolling cut shear device according to claim 3, wherein 0, 60 'are provided, and the rollers 83 are brought into contact with the guide surfaces.