JP7031853B2 - Cutting device stopper - Google Patents

Description

The present invention relates to a stopper for a cutting device for a material to be cut such as steel bar and wire. More specifically, when a long material of a certain length such as steel bar or wire is cut to a predetermined length as a material for parts or the like, scraps are generated at the end, so a stopper for a cutting device that processes the scraps. Regarding.

When a long material having a certain length such as steel bar or wire is cut with a cutting device as a material for machine parts or the like, scraps are finally generated. Since this offcut cannot be used as a component material, it must be removed as waste. Various methods for treating scraps for this purpose have been proposed (Patent Documents 1 and 2). On the other hand, as typified by automobile parts, in order to reduce the processing cost, it is required to increase the processing speed. This request is no exception to cutting equipment for steel bars, wires, etc.

In a cutting device for steel bars, wires, etc., there is a mechanism for changing the position of the stopper with a screw as a method of changing the position of the stopper in order to adjust the cutting length. Further, a mechanism for controlling the position of the stopper by a servomotor is also known. However, the mechanism for controlling the position by this servomotor requires time to perform a step of retracting the stopper for processing the end material, discharging the end material, and advancing the stopper again when the end material processing is completed. According to the knowledge of the present inventor, it takes about 20 seconds to process this offcut.

Japanese Unexamined Patent Publication No. 5-253736 Japanese Unexamined Patent Publication No. 11-254228

The present invention has been invented in the above background and achieves the following objects. An object of the present invention is to provide a stopper for a cutting device capable of high-speed scrap processing in the scrap processing of a cutting device for cutting a long material having a constant length to a predetermined size.

The present invention adopts the following means in order to solve the above-mentioned problems.
That is, the stopper of the cutting device of the present invention 1 is a fixed blade attached to the machine body to support the sent out material to be cut, and the fixed blade attached to the machine body so as to be movable with respect to the fixed blade. A movable blade that shears the material to be cut by a shearing force acting between the two, and when the material to be cut is sheared, the movable blade presses the opposite side of the material to be cut on the movable blade side. A support member having a pressing surface for sandwiching between the movable blades and movably provided in a direction parallel to the moving direction of the movable blade, and a cut to be cut for sending the material to be cut to the fixed blade and the movable blade. In a cutting device including a material feeding mechanism and a stopper for receiving the tip of the material to be cut fed by the material feeding mechanism.
The stopper has a stopper first driving means for driving the stopper in a direction orthogonal to the feeding direction of the material to be cut , the first driving means is a fluid pressure cylinder, and the stopper of the stopper. The lower portion of the contact surface in contact with the cutting material is characterized in that the lower portion thereof is cut out in a shape similar to a part of the cross-sectional shape of the material to be cut.

The stopper of the cutting device of the present invention 2 is the stopper second for driving the stopper in the direction parallel to the feeding direction of the material to be cut by the feed screw mechanism by the screw shaft and the nut in the present invention 1. It is characterized by having a driving means.
In the present invention 1 or 2, the stopper of the cutting device of the present invention 3 is characterized in that the cross-sectional shape is circular and the similar shape is an arc shape.

In the stopper of the cutting device of the present invention, when the end material is discharged, if the stopper is driven by a short distance in the direction orthogonal to the feed direction of the bar material, the end material becomes lower than the contact surface of the stopper. Therefore, since the retracting stroke S3 of the stopper can be shortened, it is possible to shorten the time for discharging the scraps.

FIG. 1 is a vertical sectional view showing a cutting device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a vertical sectional view showing a stopper device of a cutting device. FIG. 4 is a view corresponding to FIG. 3 showing a state in which the bar is sheared. FIG. 5 is a post-process of FIG. 4 showing a state in which the lower support member holds the shearing position and the movable blade and the fixed blade side pressing member are raised. FIG. 6 is a post-process of FIG. 5 showing a state in which the bar advances and pushes out the billet after shearing. FIG. 7 is a post-process of FIG. 6 showing a state in which the stopper is raised, the bar is advanced, and the scrap is being pushed out. FIG. 8 is a post-process of FIG. 7 showing a state in which the bar material is further advanced and the scrap material is discharged. 9 is an explanatory view showing the contact state between the stopper and the bar in FIG. 3, and FIG. 9A is an explanatory view and a view showing the state when the large-diameter bar is sheared. 9 (b) is an explanatory diagram showing a state at the time of scrap processing, and FIG. 9 (c) is an explanatory diagram showing a state at the time of shearing a small diameter bar.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a vertical sectional view showing a cutting device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a vertical sectional view showing a stopper device of the cutting device. As shown in FIGS. 1 to 3, the cutting device 1 according to the embodiment of the present invention has a long bar material (not shown) on the stopper device 6 side by a bar material feeding mechanism (cut material feeding mechanism) (not shown). The material to be cut) 12 is fed and sheared by the shearing force due to the relative movement of the fixed blade 3 and the movable blade 4 to manufacture a billet. The machine body 2 is fixed to the base 11 of the cutting device 1 with bolts (not shown), and the fixed blade 3 and the movable blade 4 are incorporated in the machine body 2.

The fixing blades 3 are fixed by bolts 31 and 31 in the holding holes 23 on the right end surface of the hollow cylindrical holding cylinder 21 fixed to the axial center of the machine body 2. As shown in FIG. 2, the fixed blade 3 is formed in a semicircular shape, and a semicircular blade portion 32 is formed on the upper surface thereof. As shown in FIG. 1, a hollow cylindrical guide bush 22 is fixed to the axial center portion of the holding cylinder 21, and the bar material 12 is smoothly fed to the stopper device 6 side by being guided by the guide bush 22.

The movable blade 4 is formed in a semicircular shape, and a semicircular blade portion 41 is formed on the lower surface thereof. The movable blade 4 is arranged adjacent to the fixed blade 3 and can move in the vertical direction in FIG. 1. The movable blade 4 moves back and forth in the vertical direction by a movable blade pressing drive device (not shown). The movable blade 4 is moved in the vertical direction of FIG. 1, and the bar 12 is sheared by the shearing force between the blade portion 32 of the fixed blade 3 and the blade portion 41 of the movable blade 4 to form a billet. As shown in FIG. 1, a support member 5 for supporting the bar 12 (and the sheared billet) is provided at the lower portion of the movable blade 4 so as to be movable in the vertical direction of FIG. The lower support member 5 moves up and down in the vertical direction by a lower support member pressing drive device (not shown). The billet receiving portion (pressing surface) 51 of the support member 5 has a semicircular cross section. When the movable blade 4 is lowered, the support member 5 supports the rod 12 (and the sheared billet) with a bearing force proportional to the pressing force of the movable blade 4 until the shearing of the rod 12 is completed. Is.

As shown in FIGS. 1 and 2, a semicircular fixed blade side pressing member 7 is attached to the upper portion of the fixed blade 3. A semi-circular pressing portion 71 is formed on the lower surface of the fixed blade side pressing member 7, and the outer peripheral portion of the bar 12 is pressed from above by the pressing portion 71, and the fixed blade 3 and the pressing portion 71 are held together. In cooperation with each other, the bar 12 is held and pressed while being restrained in the vertical and lateral directions. The fixed blade side pressing member 7 is provided with spring members 72 and 72 between the fixed blade side pressing member 7 and the upper surface of the fixed blade 3. The spring members 72, 72 always push the fixed blade side pressing member 7 upward by the urging force of the spring members 72, 72, and move the fixed blade side pressing member 7 away from the bar member 12 (counter-pressing direction). I am always on the move. Therefore, when the bar 12 passes over the blade portion 32 of the fixed blade 3, a gap is formed around the bar 12.

On the upper surface of the fixed blade side pressing member 7, an inclined surface 73 on the pressing member side that rises to the right is formed in FIG. 2. The inclination angle of the inclined surface 73 on the pressing member side is formed to be 6 degrees. A clamp lock 74 is attached to the machine body 2 above the fixed blade side pressing member 7 so as to be movable in the left-right direction in FIG. On the lower surface of the clamp lock 74, an inclined surface 75 on the clamp block side that rises to the right in FIG. 2 is formed. The inclination angle of the clamp block side inclined surface 75 is formed to be the same as the inclination angle of the pressing member side inclined surface 73. A cylinder 76 is attached to the right side of the clamp lock 74 on the machine body 2, and the left end portion of the piston rod 77 of the cylinder 76 is screwed into the female screw at the right end portion of the clamp block 74 and fixed. Therefore, when the cylinder 76 is operated, the clamp block 74 moves in the left-right direction in FIG.

When the solenoid valve (not shown) is switched to the retracting (pressing) side and the cylinder 76 is operated in the retracting direction (rightward in FIG. 2), the clamp block 74 moves to the right in FIG. 2 via the piston rod 77. The clamp block side inclined surface 75 of the clamp block 74 pushes down the pressing member side inclined surface 73 of the fixed blade side pressing member 7, and the pressing portion 71 of the fixed blade side pressing member 7 presses and clamps the bar material 12. The inclination angles of the clamp block side inclined surface 75 and the pressing member side inclined surface 73 are formed to be 6 degrees. This inclination angle is formed to be smaller than the friction angle between the inclined surface 73 on the pressing member side and the inclined surface 75 on the clamp block side. Therefore, even if a large reaction force acts on the fixed blade side pressing member 7 when the bar member 12 is sheared, the clamp block 74 and the piston rod 77 do not return to the left direction (unclamping direction) due to the force increasing effect of the wedge. .. Therefore, the jumping of the bar material 12 at the time of shearing is eliminated, the shearing accuracy is improved, and a stable billet can be manufactured.

As shown in FIGS. 1 and 3, the stopper device 6 is arranged on the front surface of the movable blade 4 (right side of FIGS. 1 and 3). That is, the base 61 of the stopper device 6 is fixed to the front surface of the machine body 2 of the cutting device 1 with bolts (not shown), and the slide member 62 is slidably mounted on the guide surface 611 of the base 61. The slide member 62 is slidably mounted in a direction parallel to the feed direction of the bar member 12. The left end portion of the screw shaft 63 is fixed to the right end surface of the slide member 62 with a bolt 631. The screw shaft 63 is arranged in a direction parallel to the feed direction of the bar member 12. A nut 64 is rotatably supported on the right end surface of the base 61 by a bearing 641, and a female screw 642 formed on the inner surface of the nut 64 is screwed into the right end of the screw shaft 63. A pulley 651 is fixed to the right end surface of the nut 64. A pulley 654 is fixed to an output shaft 653 of a motor (for example, a servomotor) 652 attached to the upper end surface of the base 61, and the pulley 651 and the pulley 654 are connected by a belt 655. When the motor 652 is driven, the nut 64 is rotated, and the screw shaft 63 and the slide member 62 are driven in a direction parallel to the feed direction of the bar member 12. The feed screw mechanism by the screw shaft 63 and the nut 64 constitutes the stopper second driving means.

A stopper mounting member 66 is slidably supported on the left end surface of the slide member 62 in a direction orthogonal to the feeding direction of the bar 12 (vertical direction in FIG. 3). A fluid pressure cylinder 621 is formed in the slide member 62, and a piston 622 is slidably fitted in the fluid pressure cylinder 621 in the vertical direction of FIG. The piston rod 623 is integrally formed with the piston 622, and the upper end of the piston rod 623 projects upward from the slide member 62. The upper end of the piston rod 623 and the upper end of the stopper mounting member 66 are connected by a connecting plate 624. A spacer 625 having a thickness T1 (in the stopper device 6 according to the embodiment of the present invention, the thickness T1 is set to 18 mm) is interposed between the connecting plate 624 and the upper end surface of the stopper mounting member 66. Therefore, when the piston 622 moves in the vertical direction, the stopper mounting member 66 moves in the vertical direction.

As shown in FIGS. 3 and 9A, the stopper 67 is bolted to the left end surface of the stopper mounting member 66. The lower surface 671 of the stopper 67 is formed in a semicircular shape having a radius of R1. That is, the fluid pressure cylinder 621 constitutes a stopper first driving means for driving the stopper 67 in a direction orthogonal to the feeding direction of the bar 12. The radius R1 of the lower surface 671 is formed to have a size slightly larger than the radius R2 of the bar 12. In the stopper device 6 of the embodiment of the present invention, the radius R1 of the lower surface 671 is set to 35 mm, and the radius R2 of the bar 12 having a circular cross section is set to 30 mm. Before starting the shearing operation of the bar material 12, the fixed blade 3, the fixed blade side pressing member 7, the guide bush 22, the movable blade 4, the lower support member 5, and the spacer 625 are simultaneously applied according to the diameter of the bar material 12 to be sheared. Replace as a set.

Next, the shearing operation of the cutting device 1 according to the embodiment of the present invention will be described. First, the motor 652 is driven to rotate the nut 64, and the slide member 62 is driven in a direction parallel to the feed direction of the bar member 12, so that the left end surface 673 of the stopper 67 is positioned at a predetermined position. Next, as shown in FIG. 3, the piston 622 is moved to the lower end position, and the stopper 67 is positioned at the lower end position. Next, a bar rod feeding mechanism (not shown) is operated to feed the long bar bar 12 to the right in FIG. 3, and the tip of the bar 12 (the right end of the bar 12 in FIG. 3) is set to the left end surface of the stopper 67 (the right end of the bar 12 in FIG. 3). Contact surface) The bar 12 is fed out by a predetermined length by abutting on 673. When the tip of the bar 12 comes into contact with the left end surface 673 of the stopper 67, the contact surface (hatched portion in FIG. 9A) 674 between the bar 12 and the left end surface 673 of the stopper 67 becomes a half-moon shape. The maximum height S1 of the contact surface 674 in the vertical direction is set to 10 mm in the stopper device 6 according to the embodiment of the present invention.

Next, the cylinder 76 is moved to the right in FIG. 2, and the clamp block side inclined surface 75 of the clamp block 74 pushes down the pressing member side inclined surface 73 of the fixed blade side pressing member 7, and is fixed as shown in FIG. The bar 12 is pressed and clamped by the pressing portion 71 of the blade side pressing member 7. Next, as shown in FIG. 4, the lower support member 5 rises, and the billet receiving portion 51 of the lower support member 5 supports the outer peripheral portion of the bar 12 from the lower side. Next, as shown in FIG. 4, when the movable blade 4 moves downward in FIG. 1 (shearing stroke S2) and shears the bar 12, a billet 121 having a predetermined length is cut out. As shown in FIG. 9A, the shear stroke S2 (set to 15 mm in the stopper device 6 of the embodiment of the present invention) is set to be larger than the maximum height S1 in the vertical direction of the contact surface 674. .. Therefore, the upper side of the outer peripheral portion of the billet 121 is located below the left end surface 673 of the stopper 67.

Next, as shown in FIG. 5, the movable blade 4 moves upward in FIG. At the same time, the cylinder 76 moves to the left in FIG. 2, the clamp block side inclined surface 75 of the clamp block 74 separates from the pressing member side inclined surface 73 of the fixed blade side pressing member 7, and the pressing portion of the fixed blade side pressing member 7. 71 separates from the outer circumference of the bar 12. The lower support member pressing drive device holds the lower support member 5 at the shear end position shown in FIG. Therefore, the billet receiving portion 51 of the support member 5 maintains the state in which the billet 121 is held at the shearing end position in FIG. 4 while supporting the lower side of the outer peripheral portion of the billet 121.

Next, as shown in FIG. 6, a bar material feeding mechanism (not shown) is operated to feed the bar material 12 to the right in FIG. 6, and the billet 121 is pushed out by the tip of the bar material 12 and discharged to a recovery chute (not shown). .. Since the billet 121 is located below the left end surface 673 of the stopper 67, it passes through the lower surface 671 of the stopper 67 and is discharged to the recovery chute. After that, the right end of the bar 12 comes into contact with the left end surface 673 of the stopper 67, and the bar 12 is sent out by a predetermined length. By repeating the operations of FIGS. 3 to 6 described above, a predetermined number of billets 121 having a predetermined length are sheared from the rod material 12.

When a predetermined number of billets 121 are sheared, the piston 622 moves to the upper end position and the stopper 67 retracts to the upper end position as shown in FIG. 7. As shown in FIG. 9B, the retracting stroke S3 of the stopper 67 (set to 20 mm in the stopper device 6 of the embodiment of the present invention) is set to be larger than the maximum height S1 in the vertical direction of the contact surface 674. Has been done. Therefore, the upper side of the outer peripheral portion of the end material 122 is located below the left end surface 673 of the stopper 67. Next, a bar material feeding mechanism (not shown) is operated to feed the succeeding bar member 12 to the right in FIG. 7, and the end member 122 is sent out at the tip of the succeeding bar member 12. As shown in FIG. 8, if the bar feed mechanism (not shown) is continuously operated thereafter, the end material 122 is pushed out at the tip of the subsequent bar 12 and discharged to a recovery chute (not shown).

FIG. 9 (c) illustrates a setup change method when the radius R3 of the bar 12 becomes 15 mm, which is smaller than that of FIG. 9 (a). That is, as shown in FIG. 9 (c), the spacer 625 of FIG. 9 (a) is replaced with a spacer 626 having a thickness T2 of 33 mm. With this setting, it is possible to set the maximum height S1 in the vertical direction of the contact surface between the small-diameter bar 12 and the left end surface 673 of the stopper 67 to 10 mm, which is the same as in FIG. 9A. Become. That is, simply by replacing the spacer 625 with a spacer 626 having a different thickness, it is possible to handle the bar 12 having a different diameter, so that the setup change becomes easy.

In the cutting device of the embodiment of the present invention, when the end material is discharged, if the stopper is driven for a short distance in the direction orthogonal to the feed direction of the bar material, the end material is from the left end surface (contact surface) of the stopper. Is also on the lower side. Therefore, since the retracting stroke S3 of the stopper can be shortened, it is possible to shorten the time for discharging the scraps. Further, since the contact surface between the rod material and the left end surface (contact surface) of the stopper has a half-moon shape, the contact area is secured and the durability of the stopper can be ensured. Further, since the contact surface between the rod material and the left end surface (contact surface) of the stopper has a half-moon shape, it is possible to shorten the retracting stroke S3 of the stopper.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. For example, in the above-described embodiment, the stopper is driven by the fluid pressure cylinder in the direction orthogonal to the feeding direction of the material to be cut, but it may be driven by the motor. Further, in the above-described embodiment, the cross-sectional shape of the material to be cut is circular, but a non-circular cross-sectional shape such as a rectangle or a hexagon may be used.

1 ... Cutting device 11 ... Base 12 ... Bar material (material to be cut)
121 ... Billet 122 ... Scrap 2 ... Machine 21 ... Holding cylinder 22 ... Guide bush 23 ... Holding hole 3 ... Fixed blade 31 ... Bolt 32 ... Blade part 4 ... Movable blade 41 ... Blade part 5 ... Support member 51 ... Billet receiving part 6 ... Stopper device 61 ... Base 611 ... Guide surface 62 ... Slide member 621 ... Fluid pressure cylinder 622 ... Piston 623 ... Piston rod 624 ... Connecting plate 625 ... Spacer 626 ... Spacer 63 ... Screw shaft 631 ... Bolt 64 ... Nut 641 ... Bearing 642 ... Female screw 651 ... Pulley 652 ... Motor 653 ... Output shaft 654 ... Pulley 655 ... Belt 66 ... Stopper mounting member 67 ... Stopper 671 ... Bottom surface 673 ... Left end surface (contact surface)
674 ... Contact surface 7 ... Fixed blade side pressing member 71 ... Pressing part 72 ... Spring member 73 ... Pressing member side inclined surface 74 ... Clamp block 75 ... Clamp block side inclined surface 76 ... Cylinder 77 ... Piston rod

Claims (3)

A fixed blade attached to the machine to support the sent material to be cut,
A movable blade that is movably attached to the machine body with respect to the fixed blade and that shears the material to be cut by a shearing force acting between the fixed blade and the fixed blade.
When the material to be cut is sheared, it has a pressing surface for pressing the opposite side of the material to be cut on the movable blade side and sandwiching the material with the movable blade, and is parallel to the moving direction of the movable blade. A support member provided so that it can move in the direction,
A material feeding mechanism for feeding the material to be cut to the fixed blade and the movable blade, and a mechanism for feeding the material to be cut.
In a cutting device including a stopper for receiving the tip of the material to be cut sent by the material feeding mechanism.
The stopper has a stopper first driving means for driving the stopper in a direction orthogonal to the feeding direction of the material to be cut.
The first driving means is a fluid pressure cylinder .
A stopper for a cutting device, wherein the lower portion of the contact surface of the stopper in contact with the material to be cut is cut out in a shape similar to a part of the cross-sectional shape of the material to be cut. In the stopper of the cutting device according to claim 1,
The stopper is characterized by having a stopper second driving means for driving the stopper in a direction parallel to the feeding direction of the material to be cut by a feed screw mechanism using a screw shaft and a nut. Stopper. In the stopper of the cutting device according to claim 1 or 2 .
A stopper for a cutting device, characterized in that the cross-sectional shape is circular and the similar shape is an arc shape.

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