KR102212809B1 - Stone cutting apparatus - Google Patents

Abstract

The stone cutting device according to the present invention is a cutting device provided to cut a workpiece while swinging a plurality of cutting tools at a predetermined angle, wherein the cutting tool includes a blade extending in a longitudinal direction of the workpiece and a width at the end of the blade. It includes at least one cutting tip that is provided to protrude in the direction and reciprocates by a swing motion and cuts the workpiece, and is provided to reciprocate by combining the plurality of cutting tools, and to individually adjust the tension to each cutting tool. Including; the frame part, the pipe of the cylinder that transmits hydraulic pressure from the inside so as to impart a tension of a load of a maximum of 27 tons to the cutting tool, a tension of a load of a maximum of 11 tons is applied It includes; an actuator having a higher hydraulic transmission area or higher strength than the pipe of the actuator cylinder that endures the time.

Description

Stone cutting device {STONE CUTTING APPARATUS}

The present invention relates to a stone cutting device used to cut brittle work materials such as stone, brick, concrete, asphalt, etc., and more particularly, a stone material for cutting a work material such as stone such as marble or granite into a plurality of plate types. It relates to a cutting device.

In general, stone materials such as marble and granite are mainly used as interior and exterior materials or flooring materials, and these stones are quarried in a hexahedral shape in a quarry, etc., and then cut into a plurality of plate shapes.

Conventionally, a stone cutting device is used to cut the stone into a plurality of plate shapes.

Such a stone cutting device substantially includes at least one cutting tool used to cut the stone, and includes a frame portion for fixing the cutting tool to move relative to the stone and cutting the stone.

Cutting tools are provided in various forms depending on the shape or material of the workpiece. For example, the cutting tool is in the form of a disk and cuts the workpiece by rotation, or it is provided as a straight blade to cut the workpiece by reciprocating.

Among the cutting tools, a frame gang saw is typically used as a stone cutting device using a straight blade.

A frame gangsaw, which is an example of a conventional stone cutting device, includes a frame portion, and a plurality of blades are installed in this frame portion. Here, the frame part applies tension to each blade to maintain straightness, and the frame part cuts the stone as it continuously reciprocates along the longitudinal direction of the stone.

These frame shafts are widely used when cutting large workpieces such as large block-shaped concrete, marble, granite, sandstone, limestone, etc. into thin plates.

As a cutting method using a frame shaft saw, a method of cutting the workpiece by spraying an abrasive material such as a grain-shaped steel shot is mainly used on the frame shaft saw.

On the other hand, in the recent frame gang saw, a cutting tip including an abrasive is provided by being fixed to a blade, and a technology for cutting a workpiece using this has been developed.

In addition to frame gang saws, large circular saw blades, wire saws, and band saws are used for cutting large workpieces.

The large circular saw is in the form of a disk, so it can cut at a fast cutting speed and stably, and it can cut several sheets at once by being composed of several blades. On the other hand, for large circular saws, the diameter of the disk-shaped blade increases as the thickness of the workpiece increases. As the blade diameter increases, the blade thickness increases and the overall system needs to be increased in order to secure the stability of the blade. It has the disadvantage of increasing the loss of the product and increasing the production cost.

Wire saws are generally widely used when mining stone, but recently, they are being developed to be used when cutting the mined stone into plate. However, when cutting stone using a wire saw, the production cost is still high, and the loss of the workpiece is large, so there are some restrictions on the use.

On the other hand, the frame shaft saw is widely used for cutting block-shaped large-sized stone materials because the blades in charge of actual cutting in the cutting tool can enter the inside of the workpiece.

1 to 3, the cutting tool 10, for example, the frame gang saw 10, a plurality of blades 12, for example, 250 blades may be installed, each blade is 3m or more length, 1.5 ~ 5mm thickness , Available in heights of 50-250mm.

The frame gangsaw 10 can cut a block 1 such as granite or marble into a plate, and the plate cut by the frame gangsaw 10 is polished to ultimately complete a tile or block-shaped final product. If the thickness deviation of the plate is less than 1.5 mm, it is considered to be sufficiently flat. In addition, a thickness deviation of about 2 mm or less of a plate thickness deviation is included within a generally used error range.

In order for the final granite or marble product to meet the quality requirements as mentioned above, the blade 12 must maintain a vertical path when cutting the granite or marble product.

However, when the blade 12 cuts the block 1, as shown in (a) and (b) of FIG. 3, when a local force is applied to the blade 12 in the Z-axis direction, it is twisted or bent. , When the blade 12 deviates from the vertical path, as a result, it deviates from the linear path, and the plate material deviates from the allowable thickness deviation, and accordingly, the cut plate material is treated as a defect. In addition, the deformation of the blade 12 leads to buckling or fracture, thereby increasing the wear of the blade 12 or causing permanent damage, thereby shortening the life of the blade 12.

The conventional stone cutting apparatus maintains stiffness (stiffness, straightness) of the blade 12 by applying tension to both sides of the blade 12 in the reciprocating motion direction of the cutting tool. In addition, in a cutting tool using a steel shot, a steel material having high wear resistance is required because the blade 12 is worn by the steel shot. Steel materials with good abrasion resistance have a risk of fracture during work if the tension is increased, so the optimum tension should be determined in consideration of workability. It depends on the work piece, but empirically, the optimal tensioning force is about 8-10 tons. In addition, in order to obtain a sheet material within the specification, all blades must be subjected to the same tension.

Referring to Figure 4 (a), the cutting tool 10 using a steel shot 14 among the conventional cutting tools, there is a certain space between the blade 12 and the workpiece 1, the workpiece 1 ), so that even if the blade 12 leaves its original position in the process of contacting the workpiece 1, it can easily return to its original position due to the restoring force of the blade 12 or the like. That is, the blade 12 can be cut without significantly deviating from the vertical path because the blade 12 is not constrained by the workpiece 1 even at a tension of 8-10 tons where the problem of breaking the blade 12 does not occur significantly during operation. Do.

Meanwhile, referring to (b) of FIG. 4, a cutting tip 24 is attached to the blade 22 as another conventional cutting tool 20 and used.

However, in the cutting tool 20 to which the cutting tip 24 is attached, the cutting operation is performed while the cutting tip 24 is constrained to both sides of the workpiece 1 when cutting the workpiece 1.

At this time, when a local stress such as an impact is transmitted to the cutting tool 20, the blade 22 is distorted and the workpiece 1 is cut.

In addition, the cutting tool 20 is in a state of being constrained by the workpiece 1 on both sides of the cutting tip 24 when the cutting operation of the workpiece 1 is performed in a state where the blade 22 is crooked. Due to the restoring force of (22), the blade (22) cannot easily return to its original position, and cutting is performed while the cutting tip (24) is constrained in a crooked state, which increases the amount of error in the workpiece (1). Has become. That is, compared to the method of cutting stone while supplying abrasives such as the existing steel shot, the use of the blade 22 with the cutting tip 24 has the advantage of increasing the cutting speed, but the existing tension conditions In the position of the blade 22 can more easily occur.

On the other hand, in the cutting tool to which the cutting tip 24 is attached, the blade 22 does not directly contact the workpiece 1 and thus does not wear out during operation. Therefore, the blade 22 material used here can be made of a high-strength steel material that can withstand high tension without breaking, regardless of abrasion resistance.

Meanwhile, the frame gang saw can be largely divided into two types according to the shape of moving the blade of the cutting tool.

One is that it performs only reciprocating motion like sawing, and is mainly used for cutting marble.

The other is a swing-type reciprocating motion, which is mainly used for cutting harder materials than marble, such as granite.

Here, the cutting tip of the cutting tool keeps in contact with the workpiece in the frame gang saw that reciprocates like sawing, but in the case of the swing type, it hits the workpiece about 150 times per minute and cuts the workpiece. The likelihood increases.

Therefore, when the swing-type frame saw moves in the swing-type in the process of cutting a workpiece such as granite, a greater impact is transmitted. When using a cutting tip, the lower part of the blades 12 and 22 Since the deformation becomes larger, higher tension is required compared to the case of using a conventional sawing type shaft or steel shot.

In addition, the conventional cutting tools 10 and 20 maintain the shape of the blades 12 and 22, and a spacer is used to maintain the gap between adjacent blades 12 and 22.

The spacer 30 applied to the general cutting tool 10 will be described in more detail with reference to FIG. 5. The conventional spacer 30 is provided between the blades 12 and is engaged between the other blades 12 adjacent to each other.

At this time, the blade 12 is in a state in which the left and right (y-axis directions) are constrained by the spacers 30, and accordingly, each of the blades 12 cannot be maintained with a uniform tension. That is, as each blade 12 moves in a state constrained by the spacer 30, external tension cannot be properly transmitted to the blade 12, and accordingly, the tension applied at both ends of the blade 12 is Since it is not properly transmitted due to interference by the spacer 30, only a tension smaller than the required tension is transmitted to the blade 12 between the actual spacers 30.

In this way, the conventional blade 12 cannot maintain the tension under each wear state or durability condition, and accordingly, the durability of the cutting tool 10 and the cutting quality of the workpiece are deteriorated, which is improved. Is being demanded.

Korean Patent Publication No. 10-1072382

It is an object of the present invention to allow a plurality of cutting tools to apply high pressure tension to reduce cutting performance and thus cutting time, and the tension acting on each blade of the cutting tool is normally transmitted because it is not constrained by spacers. It is to provide a stone cutting device that can properly maintain the tension of the blade, thereby improving cutting performance and durability.

A stone cutting device according to an aspect of the present invention is a cutting device provided to cut a workpiece while swinging a plurality of cutting tools at a predetermined angle, wherein the cutting tool includes a blade extending in a longitudinal direction of a workpiece and an end of the blade And at least one cutting tip that is provided thicker than the width of the blade so as to protrude in the width direction of the blade to reciprocate by a swing motion and cut a workpiece; and reciprocate by combining the plurality of cutting tools, each A frame portion provided to individually adjust the tension to the cutting tool of the; Including, the frame portion, the pipe of the cylinder that transmits hydraulic pressure from the inside so as to impart tension at which a load of up to 27 tons acts on the cutting tool, Including; an actuator having a higher hydraulic transmission area or higher strength than a pipe of an actuator cylinder that withstands when a tension applied by a load of up to 11 tons is applied; and, by limiting the lateral movement of the cutting tip, which is constrained to both sides of the workpiece during cutting. In order to prevent the deformation of the blade due to, as a structure to withstand the tension applied to the blade by the actuator, the side of the blade is formed in a rectangular structure.

Here, the frame portion may include a body portion having a plurality of actuators to correspond to the plurality of cutting tools, respectively, and the plurality of cutting tools may be coupled and maintained to correspond to the respective actuators by the body portion.

In addition, the workpiece may include granite.

According to an embodiment of the present invention, the tension transmitted to the cutting tool can be increased a lot, and accordingly, the cutting quality of the stone can be improved. In addition, in this embodiment, a cutting tool with a cutting tip is more suitable for use, and at this time, the effect on the cutting quality and cutting speed of the stone can be further increased according to the added tension. In addition, this embodiment can completely transfer tension to the cutting tool due to the use of the improved spacer. In addition, in this embodiment, the tension of a plurality of cutting tools can be individually adjusted, and a higher tension can be applied to the blade in a stone cutting device with a cutting tip including an abrasive material, thereby reducing deformation of the cutting tool. By minimizing it, it is possible to improve the cutting performance of the stone, improve the durability of the cutting tool, contribute to productivity improvement by increasing the replacement cycle of the cutting tool, and reduce the cost of maintenance or repair.

1 is a schematic view showing a state of cutting a workpiece using a reciprocating stone cutting device having a plurality of blades.
Figure 2 is a side view and a front view showing a state in which a workpiece is cut by a stone cutting device.
Figure 3 is a schematic view showing a state in which deformation occurs in the cutting tool in the process of cutting the workpiece by the stone cutting device.
4A and 4B are cross-sectional views showing a working state of a cutting tool using a steel shot and a cutting tool having a cutting tip in a stone cutting apparatus according to the prior art.
Figure 5 is a cross-sectional view showing a spacer provided between the cutting tools of the stone cutting apparatus according to the prior art.
Figure 6 is a cross-sectional view of a stone cutting device according to an embodiment of the present invention.
7 is a plan view showing a stone cutting device according to an embodiment of the present invention.
Figure 8 is a side view showing a cutting tool of the stone cutting apparatus according to an embodiment of the present invention.
9 is a cross-sectional view showing a spacer mounted between cutting tools of the stone cutting apparatus according to an embodiment of the present invention.
10 is a cross-sectional view showing a modified example of a spacer mounted between the cutting tools of the stone cutting apparatus according to an embodiment of the present invention.
11 (a) to (d) are graphs showing the thickness of the cut workpiece according to the tension acting on the blade of the stone cutting apparatus according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The shapes and sizes of elements in the drawings may be exaggerated for clearer description, and elements indicated by the same reference numerals in the drawings are the same elements.

6 is a cross-sectional view of a stone cutting device according to an embodiment of the present invention, Figure 7 is a plan view showing a stone cutting device according to an embodiment of the present invention, Figure 8 is a stone according to an embodiment of the present invention It is a side view showing the cutting tool of the cutting device. In addition, Figure 9 is a cross-sectional view of a state in which spacers are mounted between cutting tools of the stone cutting apparatus according to an embodiment of the present invention.

6 to 9, the stone cutting device 110 of this embodiment reciprocates the cutting tool 120 to both sides in the longitudinal direction of the work material, and in this process, the cutting tool 120 and the work material 100 It is a device that is in contact and cuts the workpiece 100.

As such a stone cutting device 110, a reciprocating multi-leaf type frame gangsaw is widely known. For example, in this embodiment, a plurality of cutting tools 120 swing at a predetermined angle and provide stone cutting to cut the workpiece. The device 110 will be described.

The stone cutting device 110 of this embodiment may include a plurality of cutting tools 120 provided to cut the workpiece 100 by extending in the longitudinal direction of the workpiece 100 to reciprocate, and such a cutting tool 120 They may be coupled to the frame unit 130.

The frame unit 130 reciprocates in a state in which a plurality of cutting tools 120 are combined, and accordingly, the cutting tool 120 contacts the workpiece 100 and cuts the workpiece 100.

In addition, the frame unit 130 may be provided to individually adjust the tension of each cutting tool 120.

Here, the frame unit 130 may include pillar portions 136 that are erected in at least a pair on both sides of the workpiece 100. For example, the pillar portion 136 may be installed adjacent to the four corners of the workpiece 100.

In addition, the arm portion 138 may be provided on the pillar portion 136 so as to be capable of swing rotation at a predetermined angle. In addition, a body 132 for coupling a plurality of cutting tools 120 may be provided on the arm 138.

On the other hand, the arm portion 138 is provided to be elevating, for example, may be provided to descend at a constant speed in connection with the driving unit.

In connection with the swing rotation of the arm portion 138, the cutting tool 120 may intermittently contact the workpiece 100 and cut the workpiece 100.

The body 132 fixes the front and rear ends of the cutting tool 120 and may be provided so that the cutting tool 120 imparts a constant tension. To this end, the body 132 may be provided with a plurality of actuators 134 for imparting tension to each cutting tool 120.

In this embodiment, the actuator 134 may apply an increased tension to the cutting tool 120 by about 1000 bar compared to the conventional actuator. At this time, it is preferable that the actuator 134 is provided to increase the amount of internal hydraulic pressure.

For example, in this embodiment, the actuator 134 is tensioned so that a load of about 8 to 15 tons is applied to each cutting tool 120, and when hydraulic pressure is applied up to 1000 bar that the actuator 134 can withstand, about 27 tons The tension of can be given.

In this way, in order to impart tension to the cutting tool with a load of up to 27 tons, the actuator 134 is the conventional pipe of the cylinder that transmits hydraulic pressure from the inside, when a tension applied by a load of up to 11 tons is applied. Compared to the pipe of the actuator cylinder, it is possible to take a structure with a higher hydraulic transmission area or higher strength.

In addition, the structure and strength of the frame unit 130 may be increased, and a reinforcing structure may be further provided to withstand the increased tension.

Increasing the diameter of the actuator 134 to increase the load may be limited. This is because the space for adding tension to the blades 122 is narrow as the spacing between the blades 122 is provided in 15 to 30 mm, so instead of increasing the diameter of the actuator 134, the hydraulic pressure is increased to increase the load of the actuator 134. The method of increasing is used.

On the other hand, the cutting tool 120 may include a blade 122 extending in the longitudinal direction.

Here, the blade 122 may be made of a high-tensile steel plate to sufficiently withstand a load of about 27 tons, for example, a tension transmitted by the actuator 134. That is, in the cutting tool 120, the blade 122 takes about 150 impacts per minute, and it takes 40 hours to cut the granite stone material, which is a workpiece, by about 2 m, and when it is said that the maximum use of about 20 times is possible, the high speed of 106 to 107 High cycle fatigue can be applied.

Therefore, the blade 122 must be able to endure without being broken in such a use environment, and there is also a part where the cutting tip is locally deformed, so when considering the safety factor, the blade steel type and specifications must be designed to withstand this. do.

For example, in a cutting tool using a steel shot, the blade is provided to have a size of 4 mm in thickness and 100 mm in height, and the tensile strength of the steel used may be provided at about 85 kg/mm ² . Assuming that the fatigue strength is about 40% of the tensile strength, these blades can withstand the tension generating a load of about 110 kN, that is, about 11 tons when a design stability factor of 0.8 is applied.

On the other hand, in this embodiment, the cutting tool 120 is provided with at least one cutting tip at one end of the blade 122 in order to improve the cutting force and cutting speed, and accordingly, a substantial cutting is performed by the cutting tip without a steel shot. I can.

That is, the cutting tip may be coupled to one end of the blade 122, and is provided in a form thicker than the width of the blade 122, that is, protruding in the width direction of the blade 122 to contact the workpiece 100 The work material 100 can be cut.

In this way, the blade 122 having a cutting tip may be formed to have a thickness of 3.5 mm and a height of 180 mm, and the tensile strength of the steel used may be provided as 1300 kg/mm ² .

In this embodiment, the blade 122 having a cutting tip can increase the tensile strength more than the blade of a cutting tool using a steel shot because the actual cutting is performed by the cutting tip, and according to the use of high-strength steel, the blade 122 The thickness can be reduced.

In this embodiment, assuming that the fatigue strength is about 40% of the tensile strength, the blade 122 can withstand the tension generating a load of about 266 kN, that is, about 27 tons by applying a design stability factor of 0.8.

In addition, it is preferable that the cutting tool 120 of this embodiment is designed to have a height of about 180 mm as the load that the blade 122 can withstand increases.

On the other hand, the increase in the height of the blade can also affect the tension of the blade as a whole, and when applied to a blade using a steel shot of the same height, it can be seen that it can withstand the tension generating a load of about 196 kN, that is, about 20 tons. have. However, it can be seen that a blade using a steel shot can withstand a load that is about 35% lower than that of the blade 122 having a cutting tip having the same specifications, and when the specifications including the height of the blade are increased Although it can withstand a larger load, there is a limit to increasing the specifications of the blade as the weight and size of the equipment increase accordingly.

Therefore, for this, it is preferable to use a steel having a higher tensile strength in order to increase the tension that the blade can withstand for the blade of the frame shaft using the cutting tip.

For example, in the existing working conditions, a tension of about 300 bar is transmitted to the blade by the actuator 134, and a load of about 8 to 10 tons may be generated. On the other hand, when the tension transmitted from the actuator 134 to the blade is doubled to about 600 bar, the blade can generate a load of about 16 to 20 tons.

Under these conditions, the conventional blade for steel shot is provided to withstand a load of up to about 20 tons (about 11 tons in consideration of fatigue strength and design safety factor), and thus fracture is expected.

On the other hand, since the blade 122 having the cutting tip of this embodiment can withstand a load of about 27 tons in consideration of fatigue strength and design safety factor, even when the actuator 134 generates a tension of about 3 times, that is, 900 bar. No breakage occurs.

In addition, when the height of the blade 122 having a cutting tip of the present embodiment is increased to about 250 to 300 mm, it is possible to withstand the tension of the actuator 134 up to about 1300 bar.

In addition, the cutting tool 120 may be provided with an extension member 124 for transmitting tension corresponding to the actuator 134. The extension member 124 may be connected to transmit the tension transmitted by the actuator 134 to the blade 122.

In addition, the cutting tool 120 is provided with a spacer 140 between each of the blades 122, and accordingly, each blade 122 may be coupled while maintaining a constant distance with respect to the frame portion 130.

In this embodiment, the spacer 140 is provided to constrain the movement of each blade 122 in the width direction, and may be provided to allow movement in the length direction. Accordingly, each of the blades 122 can be prevented from deformation such as bending or twisting as movement in the width direction is restricted.

In addition, as the blades 122 are allowed to move in the longitudinal direction, the tension of each blade 122 may be individually adjusted.

That is, in this embodiment, the cutting tool 120 is substantially tensioned in the width direction by the spacer 140 and the blade 122 is constrained in the width direction and movement is allowed in the length direction, so that it can be tensioned with high tension. have.

In this way, when the blade 122 is tensioned with high tension, the restoring force of the blade 122 is further increased, so that the thickness deviation of the workpiece 100 is reduced, thereby contributing to quality improvement.

Meanwhile, since both ends of the spacer 140 in the width direction are clamped by clamping means, the spacer 140 may be integrally coupled while holding the blade 122.

This spacer 140 includes a body portion 142 positioned on one side of the blade 122, and when integrally coupled to the body portion 140, the movement of the blade 122 in the width direction is restricted, but movement in the length direction The cutting tool 120, for example, a receiving portion in which the blade 122 extending in the longitudinal direction is accommodated may be provided so as to be allowed.

In this embodiment, the receiving portion may include a receiving groove portion 144 provided corresponding to the thickness of the blade 122 on one side of the body portion 142.

In addition, in the spacer 140, the body portion 142 is provided to be supported on the rear surface of the body portion 142 other than the receiving groove portion 144, and accordingly, the blade 122 is inserted into the receiving groove portion 144 The movement in the width direction can be constrained. In addition, the blade 122 does not press the blade 122 in the width direction as the body portion 142 is supported on the rear surface of the other body portion 142, thereby restraining the movement of the blade 122 in the longitudinal direction I never do that.

To this end, a gap may be formed between the receiving groove portion 144 of the body portion 142 and the blade 122.

For example, the spacer 140 may be provided with a tolerance of -0.1 to 0.5mm between the receiving groove 144 and the blade 122.

In this case, when the tolerance between the receiving groove 144 and the blade 122 is greater than 0.5 mm, the blade 122 cannot be stably restrained.

In addition, the tolerance between the receiving groove 144 and the blade 122 is preferably greater than 0, but may be allowed up to -0.1mm depending on the tolerance of the tension transmitted to the blade 122. That is, when the tolerance between the receiving groove 144 and the blade 122 is 0, it is not constrained by the coupling force of the spacer 140, so that all tension transmitted from the actuator may be transmitted to the blade 122. On the other hand, when the tolerance between the receiving groove 144 and the blade 122 is lower than 0, a certain amount of binding force is transmitted to the blade 122 due to the coupling force of the spacer 140, and thus the tension transmitted to the blade 122 Some of the may not be transmitted, but the tension required by the blade 122 may be transmitted until the tolerance between the receiving groove 144 and the blade 122 is -0.1mm.

Meanwhile, in the present embodiment, the receiving portion provided in the spacer 140 may be provided in various forms in addition to the receiving groove portion 144.

10 is a cross-sectional view showing a modified example of a spacer mounted between the cutting tools of the stone cutting apparatus according to an embodiment of the present invention.

Referring to FIG. 10, in this embodiment, the spacer 240 includes a body portion 242, and a protruding jaw portion 244 corresponding to the thickness of the blade 122 width may be coupled to the body portion 242. have.

The protruding jaw portion 244 may be coupled such that one side is positioned above and below the blade 122 on one side of the body portion 242. In addition, the other side of the protruding jaw portion 244 may be supported on the other side of the other body portion 242 that is adjacently clamped.

The protruding jaw portion 244 may be coupled to the body portion 242 by a fastening means such as a bolt 245, and for this purpose, the body portion 242 has a bolt through the through hole 244a of the protruding jaw portion 244 ( A fastening hole 242a to which fastening means such as 245) is coupled may be provided.

An embodiment of cutting a stone using the stone cutting device provided as described above will be described as follows. Here, (a) to (d) of FIG. 11 are graphs showing the thickness of the cut workpiece according to the tension acting on the blade of the stone cutting apparatus according to an embodiment of the present invention.

First, install the stone to be cut in the stone cutting device. In the stone cutting device, cutting tools are coupled along the longitudinal direction of the stone, and a plurality of such cutting tools are provided, and are clamped by clamping means together with spacers provided between the cutting tools to be integrally coupled.

Example 1

In Example 1, a conventional spacer is coupled between cutting tools, and as the cutting tool is clamped together with the spacer, the tension acting on the spacer as a whole cannot be adjusted.

When such a cutting tool exerts a tension more than necessary, some cutting tools may be broken due to excessive tension, and some cutting tools may undergo deformation such as bending due to an excessive tension.

Figure 11 (a) is a graph showing the thickness of the cut workpiece according to the tension applied to the blade according to the first embodiment.

As shown in (a) of FIG. 11, the hydraulic pressure of the actuator acting on the cutting tool in such a stone cutting device is about 300 bar, and at this time, a tension of about 7.5 tons is applied to the blade.

As described above, it can be seen that when the stone is cut under the conditions of Example 1, a large variation in thickness occurs.

Example 2

Example 2 is an example in which about 300 bar of hydraulic pressure applied to the cutting tool was applied under the working conditions of Example 1, and a tension of about 7.5 tons was applied to the blade.

These working conditions are in a state in which the spacer 140 of the present embodiment is coupled between the blades 144 when the cutting tool is coupled, and the spacer 140 maintains the gap between the blades 144 but is transferred to the blade 144 The tension is not limited, and thus all the tension generated in the stone cutting device can be transmitted to the blade 144, so that the tension transmitted to the blade 144 can be increased without increasing the tension of the stone cutting device.

The thickness of the cut workpiece according to the tension acting on the blade according to Example 2 is shown in FIG. 11B.

As shown in (b) of FIG. 11, when the stone is cut under the conditions of Example 2, it can be seen that the variation in thickness is reduced compared to Example 1.

As described above, in this embodiment, the blade 144 of the cutting tool is not completely constrained by the spacer 140, so that the tension required by the blade 144 can be completely transmitted. Therefore, it can be seen that when the stone is cut, the tension acting on the cutting tool is transmitted without loss, so that the thickness variation of the stone can be reduced.

However, in the conventional stone cutting apparatus, the tension of each cutting tool cannot be individually adjusted as the cutting tool and the spacer are integrally combined. Therefore, when the tension is generated more than the tension applied in the second embodiment, the breakage of the blade is increased and the workability is not increased.

Example 3

Example 3 is a stone cutting device according to an embodiment of the present invention, and works by transmitting a tension greater about 100% compared to the existing tension. That is, in Example 3, a hydraulic pressure of about 600 bar is added by the improved actuator.

11 (c) is a graph showing the thickness of the cut workpiece according to the tension applied to the blade according to the third embodiment.

As shown in (c) of FIG. 11, in Example 3, the stone is cut by increasing the hydraulic pressure applied to the blade by about 600 bar. At this time, a tension of about 15 tons is applied to the blade.

In this way, it can be seen that as the tension acting on the blades of the cutting tool increases, the variation in the thickness of the cut stone decreases.

Example 4

Embodiment 4 is a stone cutting apparatus according to an embodiment of the present invention, in which the spacers of this embodiment are coupled between cutting tools. Accordingly, the movement in the width direction of the cutting tool is restricted by the spacer, and the movement in the length direction is allowed and clamped.

Therefore, since each of the cutting tools is individually adjusted in tension, the tension is adjusted in consideration of the state of the blade of the cutting tool, and accordingly, the tension on the blade is individually adjusted so as not to control an excessive or excessive tension on the blade.

In Example 4, the stone is cut by increasing the hydraulic pressure acting on the blade by about 600 bar. At this time, the blade 144 is in a state where the movement in the width direction is constrained by the spacer 140, and all the tension transmitted from the improved actuator 134 is transmitted to the blade 144, and accordingly, about 15.0 tons to the blade The tension of is applied.

The thickness of the cut workpiece according to the tension acting on the blade according to Example 4 is shown in (d) of FIG. 11.

As shown in (d) of FIG. 11, in this embodiment, the cutting tool in this embodiment adjusts the tension of each blade individually with respect to the hydraulic pressure of about 600 bar, so that the stone cutting operation can proceed with the high tension of the blade acting on it. have. In addition, since the cutting tool is individually tensioned, fracture does not easily occur in a high-tension state, and the stone is cut in a state that minimizes variation of the stone.

The present invention is not limited by the above-described embodiments and the accompanying drawings, and it is common in the art that various types of substitutions, modifications and changes are possible within the scope of the technical spirit of the present invention described in the claims. It will be self-evident to those who have knowledge.

110: stone cutting device 120: cutting tool
122: blade 130: frame
132: body 134: actuator
136: pillar 138: arm
140: spacer 142: body
144: receiving groove

Claims (3)

In the cutting device provided to cut a workpiece while swinging a plurality of cutting tools at a predetermined angle,
The cutting tool includes a blade extending in a longitudinal direction of a workpiece and at least one cutting tip provided at an end of the blade to be thicker than a width of the blade so as to protrude in the width direction of the blade, reciprocating by a swing motion, and cutting the workpiece; Including,
Including; a frame portion provided to reciprocate by combining the plurality of cutting tools, and individually adjusting the tension to each cutting tool,
The frame part,
In order to give the cutting tool a tension applied by a load of up to 27 tons, the pipe of the cylinder that transmits hydraulic pressure from the inside is more than the pipe of the actuator cylinder that can withstand when the tension applied by a load of up to 11 tons is applied. It includes; an actuator with increased or increased strength,
A stone material in which the side surface of the blade is formed in a rectangular structure, as a structure that withstands the tension applied to the blade by the actuator to prevent deformation of the blade due to the restriction of lateral movement of the cutting tip that is constrained to both sides of the workpiece during cutting. Cutting device.
The method according to claim 1,
The frame portion includes a body portion having a plurality of actuators to correspond to the plurality of cutting tools, respectively,
A stone cutting device in which the plurality of cutting tools are coupled and maintained to correspond to respective actuators by the body part.
The method according to claim 1,
The workpiece is a stone cutting device comprising granite.

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