KR101776792B1 - Apparatus for cutting material - Google Patents

Abstract

Disclosed is an apparatus to cut a material. According to an embodiment of the present invention, the apparatus to cut the material comprises: a cutter arm to which a cutter unit to cut a material is coupled; a drive crank rotationally coupled to one end of the cutter arm; and a driven crank rotationally coupled to the other end of the cutter arm. Moreover, in the cutter arm, a clamping roll unit is installed to be lifted and moved to support a material in at least one position of a front and a rear of the cutter unit with respect to a transfer direction of the material when cutting the material.

Description

{APPARATUS FOR CUTTING MATERIAL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material cutting apparatus, and more particularly, to a material cutting apparatus capable of improving the shear quality of a work.

Generally, in the rolling process of a billet, a material heated at a certain temperature in a furnace is subjected to a rough rolling process and a finish rolling process, and the billet is produced by shearing a certain length.

The cutting device used to shear these billets to a certain length is a flying saw that uses a rotating saw blade and a pair of upper and lower knives to cut the material into a certain length shear) belong to the general cutting method.

On the other hand, in the case of the flying shear, the knife is fixed to the arm rotated by the power, so that the material is cut with a great force in a short time. In the process of cutting the material, And burrs are frequently formed at the edges.

In addition, when the material enters the flying shear, the material is sagged to the bottom due to its own weight, and when the material enters the flying shear under shearing, shearing causes the shear quality to be poor due to a difference in angle between the material and the knife . Therefore, various studies have been made to improve the shear quality of the flying shear.

Korean Patent No. 10-0699497 (Announcement 2016.08.26)

Embodiments of the present invention are to provide a material cutting apparatus capable of preventing sagging of a material and shearing of a cutter during shearing of the material, thereby improving the quality of shear.

According to an aspect of the present invention, there is provided a cutting apparatus comprising: a cutter arm to which a cutter unit for cutting a workpiece is coupled; a drive crank rotatably coupled to one end of the cutter arm; Wherein the cutter arm is provided with a clamping roll unit which is provided so as to be able to move up and down in order to support the workpiece in at least one position of the front and rear of the cutter unit with respect to the feed direction of the workpiece when cutting the workpiece, May be provided.

Wherein the clamping roll unit includes a front clamping roll unit and a rear clamping roll unit disposed before and after the cutter unit, and the front clamping roll unit and the rear clamping roll unit are respectively driven by a hydraulic oil path formed in the cutter arm And a clamping roller coupled to an end of the rod connected to the piston. The piston includes a piston connected to the piston, a piston moving up and down in the chamber by hydraulic pressure supplied through the hydraulic oil passage, and a clamping roller coupled to an end of the rod connected to the piston.

The clamping roll unit further includes a pivot arm which is coupled to the cutter arm such that one end of the pivot arm is rotatable up and down, and a roller coupled to the other end of the pivot arm.

The clamping roll unit further includes an elevating rod installed to be able to move up and down from the rear of the cutter unit to a receiving chamber provided in the cutter arm, an elastic member disposed in the receiving chamber for pressing the elevating rod downward, As shown in FIG.

The bolt member for coupling the cutter unit is formed in the cutter arm, and a bolt through-hole is formed to be connected to the hydraulic oil path. The hydraulic oil supplies hydraulic pressure to the bolt through- The buckling of the cutter due to the load applied to the cutter can be prevented.

Further, the bolt member includes a head and a shaft portion having a threaded portion, and the shaft portion may be provided with a piston portion to which a force due to the hydraulic pressure introduced into the bolt through-hole is applied.

The hydraulic fluid may include an upper flow path communicating the upper space of the chamber defined by the piston, a lower flow path communicating the lower space of the chamber partitioned by the piston, and a lower flow path branched from the upper flow path, As shown in Fig.

The embodiments of the present invention can prevent the cutter from being damaged due to deflection of the material as the clamping of the material is performed just before the front end of the material when the material is sheared.

Further, the embodiments of the present invention perform the pressing of the bolt member and the driving of the clamping roll supported after the front end of the blank by using the hydraulic pressure moved by the clamping roll immediately before the front end of the blank, It is possible to improve the shear quality and the life of the device by mitigating the impact of the falling material.

FIG. 1 schematically shows a workpiece cutting process using a workpiece cutting apparatus according to an embodiment of the present invention.
FIG. 2 illustrates a material cutting apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic view showing an operating state of the crank mechanism according to the embodiment of the present invention.
4 is a cross-sectional view illustrating the inside of a cutter arm of a material cutting apparatus according to an embodiment of the present invention.
5 is a side view showing a roller according to an embodiment of the present invention.
6 is a sectional view showing a cutter unit according to an embodiment of the present invention.
FIG. 7 is an operational state diagram of a material cutting apparatus according to an embodiment of the present invention when the material enters the apparatus.
8 is an operational state diagram showing a state in which a material cutting apparatus according to an embodiment of the present invention cuts a work.
9 shows a clamping roll unit according to another embodiment of the present invention.
FIG. 10 shows a material cutting apparatus according to another embodiment of the present invention.
11 shows a cutter unit according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

FIG. 1 schematically shows a workpiece cutting process using a workpiece cutting apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the material cutting apparatus 10 is a device for continuously cutting the work 5 immediately after passing through a rolling mill section 1 including a roughing mill, a finishing mill, and the like, which is heated in a heating furnace. Then, the material cut by the material cutting apparatus 10 is transferred to the next process via the roller table 3. [

FIG. 2 is a view showing a workpiece cutting apparatus according to an embodiment of the present invention. FIG. 3 is a schematic view of an operating state of a crank mechanism according to an embodiment of the present invention. FIG. 5 is a side view showing a roller according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view illustrating a cutter unit according to an embodiment of the present invention.

2 to 6, a material cutting apparatus 10 according to an embodiment of the present invention includes cutter units 30 and 70 for cutting a work 5 on upper and lower sides of a material 5 to be fed And the cutter units 30 and 70 move vertically to engage with the shear point of the work 5 via the crank mechanisms 20 and 60 provided at the upper and lower portions of the frame 11, Is cut to a predetermined length.

The crank mechanisms 20 and 60 are for moving the cutter units 30 and 70 to the front end point of the work 5. The crank mechanisms 21 and 61, the driven cranks 22 and 62, And a cutter arm (23, 63) coupled to the cutter unit (30, 70) rotatably coupled to the driven crankshaft (21, 61) and the driven crankshaft (22, 62).

3, the drive cranks 21 and 61 can be rotated about the rotary shafts 24 and 64 by a driving source (not shown), and the driven cranks 22 and 62 are rotatably supported by the cutter arms 23 and 63 So that the perpendicularity of the cutter units 30 and 70 is maintained as they rotate in the same direction and angular velocity as the drive cranks 21 and 61 with the rotation shafts 25 and 65 as a center.

The cutter units 30 and 70 are provided with cutter arms 30 and 70 for maintaining the horizontal position of the workpiece 5 at the front end point of the workpiece 5 when the cutter units 30 and 70 are sheared, Clamping roll units (40, 80) for dispersing the load supporting the material (5) and the shearing load can be provided.

The clamping roll units 40 and 80 may be provided to support the workpiece 5 in at least one of the forward and rearward positions of the cutter units 30 and 70 with respect to the feed direction of the workpiece 5. [

The clamping roll units 40 and 80 are provided on the cutter arms 23 and 63 so as to be capable of clamping the work 5 simultaneously with the front end at a distance as close as possible to the front end point of the work 5 by the cutter units 30 and 70 And includes front clamping roll units 40a and 80a and rear clamping roll units 40b and 80b provided in front of and behind the cutter units 30 and 70 with respect to the conveying direction of the blank 5, respectively.

The front clamping roll units 40a and 80a and the rear clamping roll units 40b and 80b are provided with clamping rollers 41a and 41b and 81a and 81b which are vertically movable up and down from the cutter arms 23 and 63 And the clamping rollers 41a, 41b, 81a and 81b move in the direction in which the cutter units 30 and 70 shear the work 5 by the movement of the crank mechanisms 20 and 60, The work 5 can be clamped together with the movement of the work 5.

The clamping rollers 41a and 41b provided on the cutter arm 23 located at the upper portion of the workpiece 5 are provided with rods 43a and 43b connected to the pistons 42a and 42b installed to move up and down in the cutter arms 23 and 63 As shown in Fig.

A pair of chambers 44a and 44b are provided in the cutter arms 23 and 63 so that the pistons 42a and 42b can be installed to move up and down. 23, and 63, respectively.

The upper space and the lower space are partitioned by the pistons 42a and 42b of the pair of chambers 44a and 44b, respectively, and the upper space and the lower space are partitioned by the upper passage 51 and the lower passage 52, Can be communicated.

The rear clamping roller 41b may be provided with a weight 45 on the shaft bracket to which the rear clamping roller 41b is rotatably coupled so that the rear clamping roller 41b can be positioned lower than the normal front clamping roller 41a.

The rear clamping roller 41b presses the hydraulic pressure filled in the lower space by the piston 42b by the weight of the weight 45 and supplies the hydraulic pressure to the lower space of the other chamber 44a through the lower passage 52, And presses the piston 42a connected to the roller 41a upward.

The pair of clamping rollers 81a and 81b provided on the cutter arm 63 located at the lower portion of the workpiece 5 are moved upward and downward in a pair of chambers 84a and 84b provided inside the cutter arm 63 And can be rotatably coupled to the upper ends of the rods 83a and 83b connected to the pistons 82a and 82b provided so as to be able to move up and down.

The pair of chambers 84a and 84b are separated from each other by the pistons 82a and 82b into the upper space and the lower space and the lower space defined by the pistons 82a and 82b is connected to each other by the hydraulic oil path 90 .

A weight 85 may be provided on the shaft bracket so that the front clamping roller 81a located under the workpiece 5 may be positioned below the rear clamping roller 81b.

The rear clamping roller 81b is pressed downward by the weight of the workpiece 5 and the rear clamping roller 81b is pressed downward by the weight of the workpiece 5, The front clamping roller 81a is lifted as the hydraulic pressure filled in the front wheel 84b moves to the front chamber 84a through the hydraulic oil passage 90. [

The clamping rollers 41a, 41b, 81a, and 81b may be provided in the shape of a tool as shown in FIG. 5 to smoothly hold the work 5 thereon. When the work 5 enters the grooves of the clamping rollers 41a, 41b, 81a and 81b in a twisted state, the workpiece 5 is brought into point contact with the long spherical curved surface while the clamping rollers 41a, 41b, 81a and 81b As shown in FIG.

The cutter units 30 and 70 may be mounted to the cutter mounting portions 100 provided on the cutter arms 23 and 63 through the bolt members 110 as shown in FIG. The cutter units 30 and 70 mounted on the cutter mounting portion 100 have the same structure. Hereinafter, the cutter units 30 positioned at the upper portion of the workpiece will be described as a reference.

The cutter unit 30 can be firmly fixed to the cutter mounting portion 100 via the bolt member 110 after the cutter 32 is coupled to the cutter holder 31 through bolts. To this end, a bolt through-hole 33 may be formed in the cutter mounting portion 100, through which the bolt member 110 is inserted.

The bolt member 110 includes a head 111 and a threaded shaft portion 112. The shaft portion 112 of the bolt member 110 is coupled to the shaft portion 112 after passing through the bolt through- The head 111 of the bolt member 110 firmly presses the cutter 32 firmly against the cutter mounting portion 100. As a result,

The shaft portion 112 of the bolt member 110 may be provided with a piston portion 115 having a diameter larger than that of the shaft portion 112. The piston portion 115 may have a diameter corresponding to the bolt through hole 33 and a sealing member such as an O-ring may be provided on the outer surface of the piston portion 115.

The bolt through hole 33 can communicate with the branch flow path 53 branched from the upper flow path 51 and the hydraulic pressure flowing into the bolt through hole 33 through the branch flow path 53 can flow into the piston portion 115 It is possible to provide a force for canceling the torsional stress applied to the cutter 32 upon cutting the material (5).

4, the hydraulic pressure generated by pushing the rear clamping roller 41b during the support of the blank 5 is supplied to the bolt through hole 33 through the upper flow path 51 and the branch flow path 53 So as to provide a force for canceling the torsional moment generated in the cutter 32 at the front end of the workpiece 5 as the piston portion 115 is pressed. This oil pressure can be provided so that the cutter 32 acts on the moment when the work 5 shears. When the cutter 32 shears the work 5, the bolt member 110 pushes the cutter 32 So that the cutter 32 is prevented from rotating by more firmly pushing the cutter mounting portion 100. This makes it possible to prevent the material 5 from slanting obliquely as the cutter 32 is deformed at the front end of the material 5 by the cutter 32.

On the other hand, as shown in Fig. 4, the branch passage 91 branched from the hydraulic oil passage 90 may be provided on the inner side of the cutter arm 63 located under the work.

Hereinafter, the operation of the material cutting apparatus according to the embodiment of the present invention will be described. FIG. 7 is an operational state view of a material cutting apparatus according to an embodiment of the present invention when the material enters. FIG. 8 is an operational state diagram illustrating a state in which a material cutting apparatus according to an embodiment of the present invention cuts a work.

Referring to FIGS. 7 and 8, when the work 5 is fed into the inlet of the work cutting device 10, the work 5 is rotated by the rotation of the drive cranks 21 and 61, The roller 81b first comes into contact with the lower surface of the work 5.

When the driving cranks 21 and 61 are continuously rotated, the rear clamping roller 81b is pushed downward by the weight of the work 5, and the front clamping roller 81a positioned at the lower portion of the work 5 And is lifted up to the upper part by the hydraulic pressure supplied through the hydraulic oil path 90.

When the driving cranks 21 and 61 are continuously rotated, the rear clamping roller 41b positioned on the upper side of the workpiece 5 is contacted and pressed. By the pressing force of the workpiece 5, the rear clamping roller 41b The front clamping roller 41a located at the upper portion of the workpiece 5 is moved downward by the hydraulic pressure supplied through the upper flow path 51 as the workpiece is lifted.

This configuration can prevent the work 5 from colliding with the cutter unit 70 located at the lower portion of the work 5 in accordance with the deflection of the work 5 while the work 5 enters the cutting device, The lower cutter unit 70 does not need to lift the work 5 until it is positioned at the cutting point of the work 10 and thus the abrasion of the lower cutter 72 due to the contact time with the work 5 can be prevented have.

8, the clamping rollers 41a, 41b, 81a and 81b stably support two points of the workpiece 5 adjacent to the cutter units 30 and 70 when the workpiece 5 reaches the front end point And the material 5 is kept horizontal at the shearing point by the clamping rollers 41a, 41b, 81a and 81b.

The load for supporting the work 5 and the load for shearing can be dispersed by the clamping rollers 41a, 41b, 81a and 81b by the cutter units 30 and 70 during the front end of the work 5, It is possible to extend the service life of the battery packs 30 and 70.

On the other hand, the oil pressure pressured by the rear clamping rollers 41b and 81b is supplied to the bolt through holes 33 through the branch passages 53 and 91 at the front end point of the blank 5, The bolt member 110 is pushed in the direction to cancel the torsional moment applied to the cutter 32 or 72, thereby preventing the cutter 32 or 72 from being tilted, thereby improving the quality of the front end surface of the work 5.

Hereinafter, a clamping roll unit according to another embodiment of the present invention will be described. 9 shows a clamping roll unit according to another embodiment of the present invention. In the following, the same reference numerals are assigned to the same constituent elements and the detailed description is omitted.

9, a clamping roll unit 120 according to another embodiment of the present invention includes a pivot arm 121 rotatably coupled to a cutter arm 23 at one end of the cutter unit 30, And a roller 123 coupled to the lower end of the pivot arm 121.

The turning arm 121 is provided in the form of a lever so that when the gap between the cutters 32 and 72 provided at the upper and lower portions of the work 5 is narrowed, It is possible to rotate in the upward direction with respect to the base 122. Although not shown, the shaft 122 of the pivoting arm 121 may be provided with a spring for pushing the pivoting arm 121 downward to provide a constant pressing force when the pivoting arm 121 contacts the workpiece 5, 121 may limit the rotation downward by a predetermined angle or more.

FIG. 10 shows a material cutting apparatus according to another embodiment of the present invention. 10, a clamping roll unit 130 according to another embodiment of the present invention includes a cutter unit 130 and a cutter unit 130. The cutter unit 130 includes a cutter unit 130, An elastic member 133 disposed in the accommodation chamber 131 to press the lift rod 132 downward and a roller 134 coupled to the lower end of the lift rod 132 .

11 shows a cutter unit according to another embodiment of the present invention. 11, the front surface of the cutter 72 of the cutter unit 70 disposed at the lower part of the workpiece contacts the side surface of the cutter 72 to be worn The wear prevention member 140 may be provided.

The abrasion preventing member 140 may be made of a metal material and may be elastically supported by a spring 141 disposed inside the cutter 72.

The foregoing has shown and described specific embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims.

10: Material cutting device, 20, 60: Crank mechanism,
21, 61: drive crank, 22, 62: driven crank,
23, 63: cutter arm, 30, 70: cutter unit,
33: bolt through hole, 40,80: clamping roll unit,
50, 90: hydraulic oil, 51: upper flow path,
52: lower flow path, 53, 91: branch flow path,
100: cutter mounting portion, 110: bolt member,
111: head, 112: shaft,
115: piston portion, 121: rotating arm,
131: accommodating chamber, 132: lifting rod,
133: Elastic member.

Claims (7)

A cutter arm to which a cutter unit for cutting a material is coupled;
A drive crank rotatably coupled to one end of the cutter arm;
And a driven crank rotatably coupled to the other end of the cutter arm,
Wherein the cutter arm includes a front clamping roll unit and a rear clamping roll unit disposed before and after the cutter unit,
Wherein the front clamping roll unit and the rear clamping roll unit are respectively connected to each other by a hydraulic oil path formed in the cutter arm and a piston which moves up and down in the chamber by hydraulic pressure supplied through the hydraulic oil path, And a clamping roller coupled to an end of the rod connected to the piston,
Wherein a bolt member for coupling the cutter unit is formed in the cutter arm and a bolt through hole connected to the hydraulic oil path is formed, and when hydraulic pressure is applied to the bolt through hole at the time of cutting the material, Wherein the cutter is prevented from being warped due to a load applied to the cutter by the pressurization. delete delete delete delete The method according to claim 1,
Wherein the bolt member includes a head and a shaft portion having a threaded portion,
Wherein the shaft portion is provided with a piston portion to which a force due to hydraulic pressure introduced into the bolt through-hole is applied. The method according to claim 1,
Wherein the hydraulic oil includes an upper flow path communicating the upper space of the chamber partitioned by the piston, a lower flow path communicating the lower space of the chamber partitioned by the piston, and a lower flow path branched from the upper flow path, And a branching flow path communicating with the branching flow path.

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