JP5182632B2 - Horizontal continuous casting cutting machine - Google Patents

Description

  The present invention relates to a horizontal continuous casting cutting machine used for cutting a workpiece into an appropriate length in horizontal continuous casting in which a wire workpiece is intermittently continuously cast.

  A wire such as a stellite rod made of a cobalt alloy used for a welding rod or the like is manufactured using a horizontal continuous casting apparatus. The casting apparatus placed in the first step of this horizontal continuous casting apparatus is equipped with a ceramic nozzle and a copper alloy water-cooled mold on the side wall of the molten metal accommodating part for accommodating molten metal, and a cooling water circulation around the outer periphery of the water-cooled mold. A mechanism is provided. A wire-like workpiece continuously cast through the ceramic nozzle and the water-cooled mold is pushed into a feed roll and is pulled out intermittently by the feed roll (see, for example, Patent Document 1).

And since the workpiece | work cast as mentioned above is cut | disconnected by fixed length, it is sent to the cutting machine for horizontal continuous casting. As a method of cutting a workpiece with a conventional horizontal continuous casting cutting machine, plasma cutting which is a method of separating the workpiece by applying high temperature, high energy plasma to the workpiece and melting the workpiece by about 5 to 10 mm, A shearing method that mechanically cuts using a shear is generally used.
Japanese Utility Model Publication No. 6-41944

  By the way, when the workpiece is cut by the above-described plasma cutting or shearing method using a shear, the cutting lengths become uneven and the cut surface becomes rough, so the step of performing recutting with a cutting grindstone as finishing processing After that, it was necessary to commercialize the product. On the other hand, when cutting a workpiece, it is necessary to temporarily stop and fix the workpiece that is sent intermittently, and when the workpiece is fixed with a restraining force, the workpiece is sent continuously. Will cause deflection. Since such a workpiece is made of stellite or the like having poor ductility with an elongation at room temperature of several percent or less, if the workpiece is constrained for a certain period of time, the workpiece cannot withstand the stress caused by the bending, and the workpiece breaks. There was a problem.

  The present invention has been invented to solve such problems, and its purpose is to eliminate the re-cutting process for finishing when cutting the wire-like workpiece, and to improve the work efficiency. An object of the present invention is to provide a horizontal continuous casting cutting machine capable of preventing a work having poor ductility from being broken due to bending of the work at the time of cutting.

In order to solve the above problems, the present invention proposes the following means.
That is, the horizontal continuous casting cutting machine of the present invention sends a wire-shaped workpiece in a horizontal direction along the length direction while continuously casting, and also cuts to a certain length in a pass line through which the workpiece passes. In a continuous casting cutting machine, a fixed end roll that sandwiches and supports the work passing through the pass line from above and below, a center that is positioned above the pass line and downstream of the fixed end roll and parallel to the pass line Between the cutting grindstone that is a disk that can rotate about its axis and has a cutting edge formed on the outer periphery, and the fixed end roll and the cutting grindstone, the workpiece is lifted upward while being bent to the cutting grindstone. A cylinder having a cylinder to be pressed and an elastic body that holds the workpiece lifted by the cylinder from above and generates an elastic restoring force downward. A plate, is characterized in that it comprises.

  According to the present invention, a wire-like workpiece is pressed by a cylinder from below the pass line, and is clamped between the cylinder and a clamp plate provided above the pass line while bending the workpiece with a fixed end roll as a fulcrum. In this way, the work is restrained and fixed. In addition, if the cylinder continues to press the workpiece in this state, the elastic body provided on the clamp plate is compressed, so the workpiece is moved upward while being restrained up and down and pressed against the cutting blade of the rotating cutting stone. Disconnected. After the cutting is finished, the cylinder releases the pressure of the workpiece, so that the restraint from above and below is released, and the workpiece quickly moves downward by the restoring force of the elastic body of the clamp plate and returns to the pass line. Start intermittent movement in the direction. By cutting with the cutting grindstone in this way, the work of restraining, cutting, and releasing the restraint of the work is instantaneously performed, and the work is restrained and fixed in a very short time, so that the work may be broken. There will be no great deflection.

  In addition, the horizontal continuous casting cutting machine according to the present invention is located upstream of the fixed end roll of the pass line, and supports the workpiece by sandwiching the workpiece from above and below, the fixed end roll, and the feed A support roll that is positioned between the rolls and supports the workpiece from below, and a distance between the fixed end roll and the support roll is shorter than a distance between the feed roll and the support roll. It is characterized by that.

  When the work is constrained and fixed, the work will bend, but if the support roll is in the middle position between the fixed end roll and the feed roll, the bend will have an arcuate shape with the fixed end roll and the feed roll at both ends. In this state, when cutting is finished and the work is released from the restraint, the work returns to the path line due to the restoring force of the deflection, and the work may collide with the support roll and break the work. However, when the support roll is shifted from the intermediate position between the feed roll and the fixed end roll as in the present invention, the length of the workpiece divided by the support roll between the fixed end roll and the feed roll is long. Since the work is heavy, the work bends downward and the work having a short length is light and the work is bent upward due to the contribution of the work having a long length and the rigidity of the work. That is, the shape of the workpiece becomes S-shaped due to the deflection, and a part of the workpiece is always in contact with the support roll. Therefore, even when the workpiece is released and the workpiece returns to the pass line due to the restoring force of the deflection, the workpiece does not collide because the workpiece is in contact with the support roll from the beginning. There is no breakage.

  Further, according to the present invention, since the distance between the fixed end roll and the support roll is set shorter than the distance between the feed roll and the support roll, the S-shape due to the deflection when the work is restrained is The gap between the fixed end roll and the support roll close to the cutting machine main body for cutting is convex upward, and the gap between the feed roll and the support roll is convex downward. As a result, the workpiece located downstream of the fixed end roll receives acceleration contribution downward due to the downward restoring force of the work between the fixed end roll and the support roll at the moment when the restraint is released, Since the workpiece is not displaced downward by the acceleration and does not collide with the cutting grindstone, the workpiece is not broken by this.

  According to the horizontal continuous casting cutting machine according to the present invention, it is possible to align the cutting length of the workpiece, smooth the cut surface, and increase the work efficiency because it is not necessary to perform recutting for finishing. In addition, since the restraint time of the workpiece when cutting the workpiece is extremely short, large deflection does not occur, breakage of the workpiece can be prevented, and stable and safe cutting can be performed. It becomes possible.

  Hereinafter, a horizontal continuous casting cutting machine according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram of a horizontal continuous casting cutting machine according to this embodiment. The horizontal continuous casting cutting machine 1 of the present embodiment intermittently draws a wire-like workpiece W such as a stellite rod made of a cobalt alloy for casting cast by a casting apparatus (not shown) by a feed roll 3 and extends horizontally. It is used when cutting to a certain length by the cutting machine body 2 when passing through the pass line 4.

  The cutting machine body 2 includes a fixed end roll 5 that supports a workpiece on the pass line from above and below, a lower base 6 that serves as a base for the cutting machine body 2, a cylinder 7 provided on the upper surface of the lower base 6, and a cutting machine. The upper base 8 positioned at the upper part of the main body 2, the clamp plate 9 attached to the lower surface of the upper base 8 via a spring 10 that is an elastic body, and the cutting grindstone 12 provided on the side surface of the upper base 8. Is done.

  The fixed end roll 5 is installed at the entrance of the workpiece W of the cutting machine body 2 and is composed of two rolls so as to sandwich the workpiece W passing through the pass line 4 from above and below. These two rolls are rotatably installed, and have a role of feeding the workpiece W along the pass line 4 while being rotated by the workpiece W which has been intermittently fed by the feed roll 3.

  The cylinder 7 has a two-stage cylindrical shape and is used to press the workpiece W passing through the pass line 4 from the lower side of the pass line 4 and is configured to extend vertically upward when operated. Yes. Further, the cylinder 7 determines the amount of feed of the workpiece W based on, for example, the number of rotations of the feed roll 3 and operates every time a certain amount of workpiece W is fed accordingly. It is controlled to operate so as to release the pressing of W.

  The clamp plate 9 has a flat plate shape, and one end surface 9b is attached with a spring 10 that can be vertically expanded and contracted. The clamp plate 9 is formed with a clamp surface 9a so as to face the pressing surface 7a for pressing the workpiece W of the cylinder 7 with a pass line interposed therebetween. As will be described later, the spring 10 as an elastic body easily contracts against the force that the cylinder 7 presses from below when the work W is restrained by the cylinder 7 and the clamp plate 9, and the clamp plate 9 is While it is displaced upward, it has an elastic restoring force that can reliably restrain the workpiece W with the cylinder.

  Further, the cutting grindstone 12 has a disk shape, has a cutting edge 13 on the outer periphery thereof, and is provided so that the center axis of the disk is parallel to the pass line 4. That is, the cutting blade 13 is disposed in a direction perpendicular to the workpiece W passing through the pass line 4, and the cutting blade 13 comes into vertical contact with the workpiece W displaced upward. Further, when cutting the workpiece W, the cutting grindstone 12 is rotated in the axial direction by a power source (not shown).

  Further, a feed roll 3 and a support roll 15 are provided on the upstream side of the cutting machine body 2 of the pass line 4. The feed roll 3 is installed at the uppermost stream of the pass line 4 and is used to intermittently pull out a wire-like workpiece W cast by a casting apparatus (not shown), and sandwiches the workpiece W passing through the pass line 4 from above and below. It consists of two such rolls. Further, the feed roll 3 is intermittently rotated in the direction of feeding the workpiece W from the casting apparatus by a power source (not shown).

  The support roll 15 is provided between the fixed end roll 5 and the feed roll 3, and has a role of supporting the work W passing through the pass line 4 from below, so as to come into contact with the pass line 4. It is composed of a single roll provided. Further, the support roll 15 is installed such that the distance between the fixed end roll 5 and the support roll 15 is shorter than the distance between the feed roll 3 and the support roll 15.

  A method for cutting the wire-like workpiece W by the horizontal continuous casting cutting machine 1 having the above-described configuration will be described. The workpiece W is intermittently sent from the feed roll 3 and is sent to the cutting machine main body 2 through the fixed end roll 5 while being supported by the support roll 15 from below. For example, the feed amount of the work W is judged from the rotation speed of the feed roll 3, and when a certain amount of the work W is fed, the cylinder 7 operates and extends upward, and the work W is moved from the lower side of the pass line 4 to the cylinder. 7 is pressed by the pressing surface 7a. As a result, the workpiece W is displaced upward while bending with the fixed end roll 5 as a fulcrum, and comes into contact with the clamp surface 9a of the clamp plate 9 on the upper side of the workpiece W, so that the workpiece is sandwiched between the cylinder 7 and the clamp plate 9. Be bound.

  If the cylinder 7 continues to further press the workpiece W in that state, the spring 10 which is an elastic body provided on the clamp plate 9 contracts as shown in FIG. Is cut by contacting the cutting portion 13a of the cutting blade 13 of the rotating cutting grindstone 12. When a certain period of time elapses from the moment when the cylinder 7 extends and presses the workpiece W, the pressing by the cylinder 7 is released, the workpiece W moves downward due to the restoring force of the spring 10 and gravity, and quickly returns to the pass line 4. The restraint from above and below by the clamp plate 9 and the cylinder 7 is released, and the clamp plate 9 again moves intermittently in the direction of the pass line 4.

  By cutting the workpiece W as described above, the workpiece W can be cut by the cutting grindstone 12, and the work of restraining, cutting, and releasing the restraint of the workpiece W is instantaneously performed to restrain and fix the workpiece W. The period to do so will be very short.

  Further, as described above, the cylinder 7 is controlled so as to operate and press the work W every time a certain amount of the work W is fed, and to release the press after a certain time has passed since the operation. Therefore, it is possible to cut the work W at regular scale.

  Also, if the support roll 15 is at an intermediate position between the fixed end roll 5 and the feed roll 3, the deflection of the workpiece W during cutting is upward with the fixed end roll 5 and the feed roll 3 as both ends as shown in FIG. It occurs like a bow. When the cutting is finished and the restraint of the workpiece W is released in this state, the workpiece W may return to the pass line 4 with the restoring force of the deflection, so that the workpiece W may collide with the support roll 15 and the workpiece W may be broken. is there. However, in this embodiment, as shown in FIG. 2, when the support roll 15 is installed so as to deviate from the intermediate position between the feed roll 3 and the fixed end roll 5, between the feed roll 3 and the fixed end roll 5. Of the workpieces W divided into two by the support roll 15, the long workpiece Wa positioned between the feed roll 3 and the support roll 15 has a large weight and bends downward, so that the fixed end roll 5 and the support roll 15 are bent downward. The workpiece Wb having a short length located between the two is light in weight, and has a convex shape due to the deflection of the workpiece Wa and the rigidity of the workpiece W.

  That is, the deflection shape of the workpiece W is S-shaped as shown in FIG. 2, and a part of the workpiece W is always in contact with the support roll 15. Accordingly, even when the workpiece W returns to the pass line 4 due to the deflection restoring force of the deflection of the workpiece W, since the workpiece W has been in contact with the support roll 15 since the deflection has occurred, both the Will not crash, and the workpiece W will not break.

  Further, according to the present embodiment, the position of the support roll 15 is determined so that the distance between the fixed end roll 5 and the support roll 15 is shorter than the distance between the feed roll 3 and the support roll 15. Therefore, the S-shape due to the deflection when the work W is restrained is such that the work Wb between the fixed end roll 5 and the support roll 15 near the cutting machine body 2 is convex upward, and the feed roll 3 and the support roll The workpiece Wa between 15 is convex downward. As a result, the work Wc positioned downstream of the fixed end roll 5 is fixed with a downward restoring force toward the pass line 4 at the moment when the cutting is finished and the restriction by the cylinder 7 and the clamp plate 9 is released. Due to the contribution of the downward restoring force of the workpiece Wb between the end roll 5 and the support roll 15, acceleration is given downward, and the workpiece Wc is displaced downward by the acceleration.

  If the support roll 15 is provided at a position near the feed roll 3 and the workpiece Wb is longer than the workpiece Wa, the workpiece Wb between the fixed end roll 5 and the support roll 15 close to the cutting machine body is on the bottom. It becomes convex. In such a case, when the workpiece Wc located downstream from the fixed end roll 5 is disconnected and released from the restraint, the contribution from the restoring force above the workpiece Wb rather than the restoring force below the workpiece Wc itself. Therefore, the workpiece Wc is displaced with a momentum upward, and in the worst case, the workpiece W collides with the cutting grindstone 12 and the workpiece W is broken. On the other hand, in the present embodiment, when the cutting is finished, the workpiece Wc is always displaced downward, so that this does not occur and the cutting can be performed safely.

  From the above, according to the cutting machine 1 for horizontal continuous casting according to the present embodiment, since the workpiece W can be cut with the cutting grindstone 12, the cutting length can be made uniform and the cutting surface can be smoothed. This eliminates the need for re-cutting for increasing the working efficiency. In addition, since the restraining time of the workpiece W when cutting the workpiece W is extremely short, large deflection does not occur and breakage of the workpiece W can be prevented, and stable cutting can be performed. . In addition, the work W can be automatically cut, and the work W can be prevented from being broken by the bending restoring force when the cutting is finished, so that stable and safe cutting is possible.

  As mentioned above, although the horizontal continuous casting cutting machine 1 which is embodiment of this invention was demonstrated, this invention is not limited to this, It can change suitably in the range which does not deviate from the technical idea of the invention. For example, in the present embodiment, the elastic body provided in the clamp plate 9 is the spring 10, but an elastic body made of other components may be used as long as the elastic body has a restoring force.

  If the cutting blade 13 of the cutting grindstone 12 continues to be used, it will be chipped due to wear and the distance from the pass line 4 will change, so that the cutting conditions will vary and stable cutting will not be obtained. Therefore, for example, when the lowermost edge of the cutting blade 13 is monitored by a photoelectric sensor or the like and is chipped due to wear, the cutting blade 13 and the pass line 4 are controlled by controlling the cutting stone 12 to be displaced downward. The distance can always be kept constant, and the workpiece W can be stably cut.

It is a schematic diagram of the cutting machine for horizontal continuous casting in this embodiment. It is a schematic diagram at the time of the cutting | disconnection of the workpiece | work by the horizontal continuous casting cutting machine in this embodiment. It is explanatory drawing of the bending of the workpiece | work which arises when a support roll exists in the intermediate position of a fixed end roll and a feed roll.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting machine for horizontal continuous casting 2 Main body of cutting machine 3 Feed roll 4 Pass line 5 Fixed end roll 7 Cylinder 9 Clamp plate 10 Spring (elastic body)
12 Cutting wheel 13 Cutting blade 15 Support roll W Workpiece

Claims (2)

In a horizontal continuous casting cutting machine that feeds a wire-like workpiece in a horizontal direction along the length direction while continuously casting, and cuts to a certain length in a pass line through which the workpiece passes,
A fixed end roll that sandwiches and supports the workpiece passing through the pass line from above and below,
A cutting grindstone that is located above the pass line and downstream of the fixed end roll and is rotatable around a central axis parallel to the pass line and has a cutting edge formed on the outer periphery thereof,
A cylinder that lifts and presses the workpiece while bending the workpiece upward between the fixed end roll and the cutting wheel;
A horizontal continuous casting cutting machine comprising: a clamp plate including an elastic body that suppresses the workpiece lifted by the cylinder from above and generates an elastic restoring force downward. A feed roll that is positioned upstream of the fixed end roll of the pass line and supports the workpiece by sandwiching it from above and below;
A support roll positioned between the fixed end roll and the feed roll and supporting the workpiece from below;
The horizontal continuous casting cutting machine according to claim 1, wherein a distance between the fixed end roll and the support roll is shorter than a distance between the feed roll and the support roll.

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