Cutting device for wire mesh steel wire

Abstract

To provide a wire mesh cutting device that can prevent sudden lateral slippage and rotation of the steel wire during cutting, while also avoiding damage to the cutting blade. [Solution] The fixed blade 20 has a straight blade 26, and the movable blade 30 has a guide groove 37 that can accommodate the steel wire 41, and a grooved blade 36 is formed at the end of the guide groove 37, so that the steel wire 41 can be cut between the straight blade 26 and the grooved blade 36 while positioned within the guide groove 37.

Description

Technical Field

[0001] The present invention relates to a wire cutting device for high-strength wire meshes suitable for cutting steel wires used for tornado protection, rockfall protection, etc.

Background Art

[0002] It is widely known (such as Patent Documents 1 and 2) to manufacture a diamond wire mesh by winding a straight steel wire around a loop portion of an existing wire while applying a coiled bending process to the straight steel wire.

[0003] When manufacturing a diamond wire mesh, before knuckle processing the end portion of the diamond wire mesh, the end portion of the steel wire is cut using a cutting device. Patent Document 3 discloses a guillotine-type cutting device that combines a fixed blade and a movable blade. The blades of conventional fixed and movable blades are both straight linear blades, and the steel wire is sandwiched between a pair of straight blades and cut.

[0004] The strength required for a diamond wire mesh varies depending on the application. For example, for diamond wire meshes used at sites where high endurance is required, such as for tornado protection or rockfall protection, ultra-high strength steel wires with a very high breaking strength are used. On the other hand, since the fixed and movable blades are required to have a higher hardness than the steel wires constituting the wire mesh, blade materials such as high-speed steel (HSS) and low-grade cemented carbide are selected.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] Conventional steel wire cutting devices have the following problems that need to be addressed. <1> For example, when cutting a horizontally oriented steel wire by applying cutting force from above and below, the cutting force acts on two points, above and below, where a pair of straight blades make point contact with the outer surface of the steel wire, which has a circular cross-section. Because there is no retaining member for the steel wire, the steel wire is prone to sliding sideways or rotating on the blade of the straight cutting edge. If the steel wire slides laterally and displaces on the blade of a straight cutting tool, it cannot be cut at the correct position. If the steel wire is cut off-center from its intended position, the subsequent knuckle-finishing process at the end of the wire mesh is likely to result in manufacturing defects. <2> In diamond-shaped wire mesh made of ultra-high-strength steel wire with extremely high breaking strength, the breaking load on the steel wire becomes significantly higher, making it easier for the steel wire to slip or rotate when it breaks. When cutting ultra-high-strength steel wire under a cutting load, if the wire slides sideways or rotates, it can induce cutting at the end of the cutting tool, causing the blade to chip or break, shortening the tool's lifespan, and potentially leading to work stoppages due to damage to the straight edge. <3> Furthermore, if a part of the blade of the cutting tool breaks during cutting, the fragments can scatter, creating a dangerous situation and worsening the working environment. <4> When cutting at two points, top and bottom, the cut ends of the steel wire will scatter into the surrounding area. Depending on the circumstances, this could lead to injuries to workers or malfunctions in manufacturing machinery.

[0007] The present invention aims to provide a wire cutting device for wire mesh that solves the problems described above. [Means for solving the problem]

[0008] The present invention The ends of two steel wires of a diamond-shaped wire mesh, which was made by winding multiple coiled steel wires around the loops of existing steel wires, Fixed and movable blades arranged opposite each other 2 sets Between the blades Place them in the respective locations.A guillotine-type cutting device for cutting, wherein one of the fixed or movable blades has a straight blade, and the other of the fixed or movable blades has a guide groove capable of accommodating the steel wire, and the end of the guide groove has a grooved blade, the guide groove has a centering function that guides the steel wire to the center of the grooved blade and a positioning function that positions the steel wire to the center of the grooved blade, and with the steel wire positioned in the guide groove, between the straight blade and the grooved blade While simultaneously restricting the sudden lateral movement and rotation of the two coiled steel wires, It was configured to be cut. In another embodiment of the present invention, the fixed cutting tool has a straight blade, and the movable cutting tool has a guide groove and a grooved blade. In another embodiment of the present invention, the movable blade has a shaft portion and a pressing portion, and a guide groove and a grooved blade are formed at the tip of the pressing portion. In another embodiment of the present invention, the guide groove has a substantially U-shaped or substantially V-shaped cross-section, and the groove cutting edge has the same cross-sectional shape as the guide groove. 。 Book In another embodiment of the invention, the steel wire for the wire mesh is an ultra-high-strength steel wire. [Effects of the Invention]

[0009] The present invention can achieve at least one of the following effects. <1> By providing a guide groove with both a centering function and a steel wire positioning function on either the fixed or movable cutting tool, it is possible to reliably prevent the sudden lateral slippage and rotation of the steel wire during cutting. Therefore, steel wire can be cut to precise dimensions and with a clean cut surface. <2> When cutting steel wire, there is no risk of chipping or breakage of the straight or grooved blades, eliminating the need for replacement due to blade damage and allowing the blades to be used for a long period of time. <3> When cutting steel wire, damage to the straight or grooved blade can be avoided, eliminating the scattering of blade fragments and allowing cutting work to be performed in a safe environment. <4>Even for ultra-high strength steel wires that have hitherto required extremely high cutting forces and have been difficult to cut, they can be cut efficiently and safely. <5>In the past, for cutting with a pair of straight blades, lateral sliding and rotation of the steel wire occurred, and both the fixed blade and the movable blade were consumed. Therefore, blade replacement was inevitably done as a set of a pair. However, in the present invention, since the movable blade suppresses the lateral sliding and rotation of the steel wire, the consumption of the movable blade is small, and it is possible to deal with only the replacement of the fixed blade. <6>Due to the centering function by the guide groove of the movable blade, cutting can be performed at a fixed position of the fixed blade, and the wear of the fixed blade becomes a certain part. For this reason, regrinding of the fixed blade becomes possible, and by using it in combination with the liner plate, the replacement frequency of the fixed blade itself can be suppressed.

Brief Description of the Drawings

[0010] [Figure 1] Perspective view of the cutting device for steel wires for wire mesh according to the present invention with a part omitted [Figure 2] Overall perspective view of the fixed blade [Figure 3] Overall perspective view of the movable blade [Figure 4] Explanatory drawing of the cutting device immediately before cutting the steel wire. (A) is a front view of the cutting device, and (B) is a cross-sectional view of the cutting device with the movable blade longitudinally cut [Figure 5] Model diagram of the fixed blade and the movable blade when cutting the steel wire [Figure 6] Explanatory drawing of the cutting device when cutting the steel wire. (A) is a front view of the cutting device, and (B) is a cross-sectional view of the cutting device with the movable blade longitudinally cut

Embodiments for Carrying Out the Invention

[0011] Hereinafter, the present invention will be described in detail while referring to the drawings.

[0012] <1>Overview of the cutting device for steel wires for wire mesh The cutting device 10 will be described with reference to FIGS. 1 to 3. The wire mesh cutting device 10 according to the present invention is installed as part of a manufacturing apparatus for diamond-shaped wire mesh 40 and is used to cut spirally processed steel wire 41, and comprises a fixed blade 20 and a movable blade 30 arranged opposite each other. In this example, we will describe a configuration in which the fixed cutting tool 20 and the movable cutting tool 30 are arranged vertically, but the direction in which the fixed cutting tool 20 and the movable cutting tool 30 face each other may be horizontal or in any other direction.

[0013] <2> Fixed cutting tool The fixed cutting tool 20 is a fixed cutting tool that is used by being fixed to a cutting tool holder (not shown in the diagram) with bolts. Referring to Figure 2, the fixed cutting tool 20 has a rectangular prism-shaped shaft portion 21 and a blade portion 25 that are fixed to the cutting tool holder. A stepped surface 22 is provided between the shaft portion 21 and the blade portion 25, but the stepped surface 22 is not essential and can be omitted.

[0014] <2.1> Shaft portion of fixed cutting tool The shaft portion 21 is a rectangular prism with a rectangular cross-section, and has an elongated bolt hole 24 in a part of it, which can be fixed to the tool post by inserting a fixing bolt through the bolt hole 24.

[0015] <2.2>Blade portion of fixed cutting tool The blade portion 25 is formed continuously along the transverse direction of the shaft portion 21 and has an upright surface 23 along the projection direction of the blade portion 25 and a straight blade 26 for shearing along the transverse direction of the shaft portion 21. The straight blade 26 formed at the corner between the upright surface 23 and the tip surface is a straight cutting blade and is positioned perpendicular to the steel wire 41 to be cut.

[0016] <3> Movable blade The movable blade 30 is a movable blade that is attached to the tip of a pressing means such as a hydraulic cylinder for use. Referring to Figure 3, the movable blade 30 has a rectangular prism-shaped shaft portion 31 and a pressing portion 35. A stepped surface 32 is provided between the shaft portion 31 and the pressing portion 35, but the stepped surface 32 is not essential and can be omitted.

[0017] <3.1> Shaft of the movable blade The shaft portion 31 is a rectangular prism with a rectangular cross-section, and has an elongated bolt hole 34 in a part of it. The movable blade 30 can be fixed to the tip of a pressing means such as a hydraulic cylinder by inserting a fixing bolt through the bolt hole 34 and screwing it in.

[0018] <3.2> Pressing part of the movable blade The pressing portion 35 is a projection formed continuously along the transverse direction of the shaft portion 31 and is positioned perpendicular to the steel wire 41 to be cut. The pressing portion 35 has a guide groove 37 in the center, which has a roughly U-shaped or roughly V-shaped cross-section. The guide groove 37 is formed continuously across the width direction of the pressing portion 35. The guide groove 37 has a cross-sectional shape in which the groove width at its exit side is greater than the diameter of the steel wire 41, and the groove width gradually narrows towards the back of the groove.

[0019] <3.2.1> Guide groove The guide groove 37 has a centering function that guides the steel wire 41 to the central position of the pressing section 35 when cutting the steel wire 41, and a positioning function that positions the steel wire 41 in a fixed position. The pressing portion 35 of the movable blade 30 is positioned perpendicular to the steel wire 41 to be cut, and the guide groove 37 is positioned parallel to the steel wire 41.

[0020] <3.2.2> Grooving blade A cutting blade 36 is formed at one end corner of the guide groove 37. The shape of the groove blade 36 and the cross-sectional shape of the guide groove 37 are identical. The steel wire 41 is placed between the straight blade 26 of the fixed blade 20 and the grooved blade 36 of the movable blade 30, and the movable blade 30 is slid to cut the steel wire 41.

[0021] <4> Installation configuration of fixed and movable blades The fixed cutting tool 20 and the movable cutting tool 30 are arranged so that their straight blade 26 and grooved blade 36 face each other, and the upright surface 23 of the fixed cutting tool 20 and the upright surface 33 of the movable cutting tool 30 are mounted so that they can slide against each other.

[0022] In this example, we will describe a configuration in which two sets of cutting devices 10, each consisting of a pair of fixed blades 20 and a movable blade 30, are arranged to cut two steel wires 41 and 51 simultaneously. The number of cutting devices 10 to be installed should be appropriately selected according to the number of steel wires 41 to be cut.

[0023] [Method for cutting steel wire] Next, we will explain the method for cutting steel wire using the cutting device 10.

[0024] <1> Preparation for cutting The steel wire 41 to be cut is positioned between the blade portion 25 of the opposing fixed blade 20 and the pressing portion 35 of the movable blade 30.

[0025] <2> Guide wire The movable blade 30 is slid toward the fixed blade 20. As the movable blade 30 slides, the steel wire 41 is housed in the guide groove 37 formed in the pressing portion 35 of the movable blade 30, and the steel wire 41 is guided to the bottom of the guide groove 37 along the inclined groove wall of the guide groove 37. In other words, at the start of cutting, regardless of the position of the steel wire 41 in the guide groove 37, it is centered and guided to the center of the pressing portion 35 for positioning.

[0026] <3> Cutting steel wire For example, as explained in the previous technology section, if both the movable and fixed cutting tools are straight blades, the steel wire may suddenly slip sideways or rotate during cutting, making it difficult to cut at the correct position, and the cut surface of the steel wire will be rough.

[0027] In contrast, the present invention allows for cutting the steel wire 41 while restricting its lateral sliding and rotation through the cutting action described below.

[0028] In other words, as shown in Figure 5, the outer surface of the steel wire 41, which has a circular cross-section, makes surface or line contact with the inner surface of the groove blade 36 of the movable cutting tool 30 and the groove wall surface of the guide groove 37, thereby reliably restricting the sudden lateral slippage and rotation of the steel wire 41. As shown in Figure 6, the cutting force applied to the steel wire 41 increases while the steel wire 41 is held in a position where it cannot be displaced, and cutting progresses between the straight blade 26 and the grooved blade 36. Even while the steel wire 41 is being cut, the guide groove 37 of the movable cutting tool 30 presses against the outer surface of the steel wire 41, continuously restricting the lateral movement and rotation of the steel wire 41.

[0029] As in the present invention, the guide groove 37 reliably prevents displacement and rotation of the steel wire 41 sandwiched between the straight blade 26 and the grooved blade 36, so that the steel wire 41 can be cut to precise dimensions and the cut surface is clean.

[0030] In this way, since there is no risk of chipping or breakage of the straight blades 26 or grooved blades 36, replacement due to blade damage becomes unnecessary, allowing each blade 20 and 30 to be used for a long period of time. Furthermore, since there is no scattering of blade fragments, cutting work can be performed in a safe environment. In particular, even if the steel wire 41 is an ultra-high-strength steel wire requiring extremely high cutting force, it can be cut efficiently and safely.

[0031] [Other examples] The above describes a configuration in which a straight blade 26 is formed on the fixed cutting tool 20 side and a grooved blade 36 is formed on the movable cutting tool 30 side, but the straight blade 26 and the grooved blade 36 may be swapped. In other words, in this example, the cutting device 10 may be configured with a fixed cutting tool 20 having a grooved blade and a movable cutting tool 30 having a straight blade. The effect of cutting the steel wire 51 with the cutting device 10 is the same as in the previously described embodiment. [Explanation of Symbols]

[0032] 10... Cutting device 20. Fixed cutting tools 21.....Shaft 22...Step surface 23...Elevating surface 24 bolt holes 25...Blade part 26...Straight blade 30..Movable blades 31...Shaft 32...Step surface 33...Elevating surface 34 bolt holes 35. Pressing part 36... Grooved blades 37.. Guide groove 40.. Diamond-shaped wire mesh 41.. Steel wire

Claims

1. A guillotine-type cutting device for cutting a diamond-shaped wire mesh, which is made by winding multiple coiled steel wires around the loop portion of an existing steel wire, by placing the ends of two steel wires between two sets of blades, a fixed blade and a movable blade, which are arranged opposite each other. The fixed blade or the movable blade has a straight blade, The other blade of either the fixed blade or the movable blade has a guide groove capable of accommodating the steel wire, and the end of the guide groove has a grooved blade. The guide groove has a centering function that guides the steel wire to the center of the groove blade and a positioning function that positions the steel wire to the center of the groove blade. The system is characterized by being configured to simultaneously cut two steel wires, which are bent in a coil shape between the straight blade and the grooved blade, while restricting their sudden lateral movement and rotation, with the steel wire positioned within the guide groove. A cutting device for steel wire used in wire mesh.

2. The wire cutting device for wire mesh according to claim 1, characterized in that the fixed cutting tool has a straight blade and the movable cutting tool has a guide groove and a grooved blade.

3. The wire cutting device for wire mesh according to claim 2, characterized in that the movable blade has a shaft portion and a pressing portion, and a guide groove and a grooved blade are formed at the tip of the pressing portion.

4. The wire cutting device for wire mesh according to claim 1 or 2, characterized in that the guide groove has a substantially U-shaped or substantially V-shaped cross-section, and the groove blade has the same cross-sectional shape as the guide groove.

5. The wire mesh cutting device according to claim 1, characterized in that the steel wire for the wire mesh is an ultra-high-strength steel wire.

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