KR102038800B1 - Metal cutting method - Google Patents

Abstract

The present invention relates to a method for cutting metal and, more specifically, to a method for cutting metal by a band saw rotating in one way by being connected to a wheel, wherein the wheel rotating in one way is installed on both sides based on metal to be cut. The method for cutting metal can extend a life of a saw cutting the metal. According to the present invention, the method for cutting metal includes: a fixing step of fixing the metal mounted on a worktable by moving a chuck by a driving unit; a cutting step of cutting the metal by moving the band saw, moving in the one way by being individually connected to the wheel rotating in the one way and individually installed on both sides based on the metal, downward by a lifting unit; and a transfer step of moving the band saw upward after the cutting step and transferring the metal mounted on the worktable as much as a predetermined distance in a direction crossing the band saw adjacent to the metal by a transfer unit after unfixing the metal by moving the chuck. After the transfer step, the fixing step and the cutting step are repeated.

Description

Metal cutting method {METAL CUTTING METHOD}

The present invention relates to a metal cutting method, and more particularly, a method of cutting a metal by a band saw that is unidirectionally rotated on both sides with respect to the metal to be cut, and connected to the wheel and rotated in one direction. The present invention relates to a metal cutting method capable of extending the life of a saw for cutting metal.

In general, the metal cutting device is used for cutting various industrial materials such as ferrous metals and nonferrous metals (Cu, Al, etc.).

In such a metal cutting device, a saw is used to cut a metal material, and the metal cutting device comes into contact with a metal material to cut a surface thereof little by little.

In addition, the saw (tip of the saw) is generally made of an alloy such as tungsten carbide to provide cutting and wear resistance.

However, since circular cutting saw blades are mainly used for cutting metal materials, even if the tip is made of durable materials, wear or breakage may occur if used repeatedly.

The prior art Patent Registration No. 10-1619892 (hereinafter referred to as a prior art) relates to a metal cutting machine capable of cutting a long object, more specifically, the angle of the cutting object can be freely adjusted as well as the By adjusting the horizontal distance between the cutting object P and the cutting actuator 6 according to the angle, the cutting object P can always be positioned and cut at the cutting angle desired by the operator. The working surface plate 4a on which the working body 6 is mounted with the actuator 6 in the state in which the rotating disk 14 holding the cut object P1, which is the longest object to be cut, with the vise 26 is stopped, allows the shaft to rotate. (4a) is pivotally connected to the swing operating plate (4b), which is spaced apart via the separation bar (50), and the pivoting operation plate (4b) rotatably connected with a virtual rotary axis and the rotational rolling motion relative to the swing operation plate (4b) By providing a base plate 4c having a plurality of ball bearings 58 on the face to enable this, Even if the object to be cut (P1) is a long object, the worktable itself can be rotated without moving the long object so that the cutting can be easily permitted.

However, the prior art has a problem that the service life of the saw is short because the rotation radius of the saw for cutting metal is small.

The present invention has been made to solve the above problems, an object of the present invention is to provide a metal cutting method that can extend the life of the saw for cutting metal.

In addition, an object of the present invention is to provide a metal cutting method that can reuse the cutting oil, but can be separated from the used waste cutting oil to reuse the cutting chips contained in the used waste cutting oil.

The present invention for the purpose of solving the above problems has the following configuration and features.

The present invention relates to a metal cutting method using a metal cutting device, comprising: a fixing step of fixing a metal loaded on a workbench by moving a chuck by a driving unit, each of which is provided on both sides of the metal and rotates in one direction. A cutting step of cutting a metal by moving the band saw moving in a unidirectional direction downward by a lifting unit. After the cutting step, the band saw is moved upward, and the chuck is moved to release the metal. Thereafter, a transfer step of transferring the metal loaded on the work table by a transfer unit in a direction orthogonal to the band saw adjacent to the metal, and repeats the fixing step and the cutting step after the transfer step. .

In addition, the cutting step includes a cutting oil spraying step for spraying the cutting oil to the band saw by an injection nozzle provided in the gripping portion for holding the band saw, the metal cutting device is a waste cutting oil storage unit for storing the used waste cutting oil And a circulation part for resupplying the used waste cutting oil to the injection nozzle, wherein the metal cutting device has one end portion for moving the cutting chip included in the used waste cutting oil to the cutting chip storage part. In contact with the bottom, and further comprising a screw impeller to rotate by an inclined upward axis, the cutting chip storage portion may be provided on the other end of the screw impeller.

In addition, the screw impeller may be curved upward as the radially outward direction from the axis.

The present invention having the above-described configuration and features has the effect of extending the life of the saw cutting metal by using a band saw which is provided on both sides of the metal and connected to each of the wheels that rotate in one direction and moves in one direction. .

In addition, the present invention is to reuse the cutting oil, including the circulation portion, by contacting the bottom of the waste coolant storage unit, by including a screw impeller rotating by an inclined upward axis, by cutting the cutting chip contained in the used waste cutting oil is cut The cutting chips can be reused by storing them separately in the chip storage section, and the cutting chips can be removed from the used waste cutting oil supplied to the spray nozzle to improve the cooling efficiency of the used waste cutting oil sprayed from the spray nozzle. Has

In addition, in the present invention, the screw impeller is bent upward as the shaft progresses outward in the radial direction, so that the cutting chip can be easily separated from the waste cutting oil storage part and moved upwardly (the direction in which the cutting chip storage part is provided). .

1 is a schematic flowchart of a metal cutting method according to an embodiment of the present invention.
2 is a view of a metal cutting device for explaining a band saw that rotates in one direction by a wheel.
3 is a view for explaining a driving unit.
4 is a view for explaining the metal cut by the band saw while the chuck is moved in the direction of the protrusion and the metal is fixed by the chuck and the protrusion.
5 is a view for explaining the metal in the state of being released in a state where the chuck and the protrusion away from,
6 is a view for explaining a transfer unit.
7 is a view for explaining the circulation portion and the waste cutting oil storage portion.
8 is a view for explaining the waste coolant storage unit and the screw impeller.
9 is a view for explaining a cutting chip storage unit.
10 is a diagram for explaining a protective film.

Since the present invention may be modified in various ways and have various forms, embodiments (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments (suns, aspects, and embodiments) (or embodiments) only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms “comprises” or “consists” are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, but one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In the present specification, the first to second and the second to refer to different components are not limited to the order of manufacture, and their names are used in the detailed description and claims of the present invention. May not match.

Throughout this specification, when a part is "connected" to another part, it is not only "directly connected" but also "electrically connected" or "indirectly connected" with another element in between. "Includes the case.

1 is a schematic flowchart of a metal cutting method according to an embodiment of the present invention, FIG. 2 is a view of a metal cutting device for explaining a band saw rotating in a unidirectional direction by a wheel, and FIG. 4 is a view for explaining a metal that is cut by a band saw while the chuck moves in the direction of the protrusion and the metal is fixed by the chuck and the protrusion.

1 to 4, a metal cutting method according to an embodiment of the present invention relates to a cutting method of a metal M by the metal cutting device 1.

The metal cutting method includes a fixing step S11, a cutting step S12 and a conveying step S13.

In the fixing step S11, the chuck 111 is moved by the driving unit 11 to fix the metal M loaded on the work table T. The metal M is loaded on the work table T in a loading step (not shown) before the fixing step S11. More specifically, in the loading step (not shown), the metal M may be disposed between the protrusion T1 protruding upward on the work table T and the chuck 111. Herein, the metal M may be, for example, a bar.

For example, the driving unit 11 may be a hydraulic cylinder, which is connected to the chuck 111 so that the chuck 111 is perpendicular to the longitudinal direction of the metal M (12 o'clock to 6 o'clock based on FIG. 4). By moving in the direction (3 o'clock-9 o'clock based on FIG. 4) to fix or release the metal (M) between the chuck 111 and the protrusion (T1).

In the fixing step S11, the driving unit 11 moves the chuck 111 in the protruding portion T1 direction (3 o'clock based on FIG. 4) so that the metal M is not moved in the cutting step S12 described later. Fix it.

The driving unit 11 is connected to the control unit 18 to maintain the state in which the chuck 111 is moved toward the protrusion T1 until the cutting step S12 (that is, the time when the cutting of the metal M is completed) which will be described later. To press-fix the metal M.

Here, the control unit 18 may be applied to various control configurations or computing devices (for example, various electronic devices or electronic modules such as computers, processors, etc.) known to those skilled in the art. For example, the controller 18 may drive a signal or command generated according to a program or algorithm included in the driver 11, a lifting unit 12, a transfer unit 13, an injection nozzle 141, and a circulation unit ( 16) and the second motor (not shown) for rotating the shaft (X), the first motor (not shown) for rotating the wheel (W) may be configured to transmit a control signal. For example, the control unit 18 may be an intrinsic configuration inherent in the metal cutting device 1, or may be provided separately from the metal cutting device 1 at a position adjacent to the metal cutting device 1 to provide a driving unit 11, which will be described later. A second motor (not shown) for rotating the elevating unit 12, the conveying unit 13, the injection nozzle 141, the circulation unit 16, and the shaft X, and a first motor for rotating the wheel W (not shown). May be an independent configuration connected to a wire or wirelessly.

Cutting step (S12) is provided on both sides with respect to the metal (M), respectively, connected to each of the wheel (W) that rotates in one direction, the belt saw 121 moving in one direction in the downward direction by the lifting unit 12 Move to cut the metal (M).

In more detail, wheels W that rotate in a unidirectional direction (exemplarily counterclockwise with reference to FIG. 1) by the first motor (not shown) are respectively provided on both sides with respect to the metal M ( Referring to FIG. 2, the wheel W on the left side can be confirmed by opening the housing H based on the metal M disposed on the work table T, but the wheel W on the right side based on the metal M. FIG. ) Is provided inside the closed housing (H)). The metal M as a reference herein means a metal M disposed between the chuck 111 and the protrusion T1. As described above, the first motor (not shown) may be driven by the control signal of the controller 18.

For example, referring to FIG. 2, each of the wheels W may rotate in a unidirectional direction about a central axis inclined by about 45 degrees with respect to the length direction of the metal M. Referring to FIG. At this time, one side of the guide bar in the band saw 121 is rotated in a unidirectional direction (counterclockwise based on Figure 2) in contact with at least a portion of the rim of each wheel (W). At this time, the band saw 121 is a band saw 121 by the grip portion 14 provided adjacent to the metal (M) on the left side (9 o'clock based on FIG. 3) of the metal (M) relative to the metal (M). The saw blade of the saw blade (saw blade in the lower direction (5 o'clock based on Figure 2) adjacent to the metal (M) in the saw blade provided along the edge of the guide bar can be gripped in a state of being in contact with the metal (M). . In this case, when the band saw 121 is rotated in the clockwise direction with reference to FIG. 2, the grip portion 14 is located on the right side of the metal M based on the metal M (at 3 o'clock based on FIG. 3). Of course it can be provided adjacent to. That is, the gripping portion 14 is provided at the front end of the metal M based on the advancing direction of the portion adjacent to the metal M in the band saw 121.

At this time, the cutting step (S12) by moving the band saw 121 in the lower direction (5 o'clock based on Figure 2) by the lifting unit 12 to cut the metal (M) from the surface to the final cut. In this case, the lifting unit 12 may be a hydraulic cylinder and may be controlled by the control signal of the controller 18 described above. The lifting unit 12 may lift and lower each of the wheels W to which the band saw 121 is connected or the housing H in which the wheels W are disposed.

As described above, in the metal cutting method, the band saw 121 having a longer length than the general circular saw blade of the saw cutting the metal M in the cutting step S12 is rotated in one direction by the wheel W and the metal M is rotated. Since the cutting of the metal (M) in the band saw 121, the portion where the temperature is increased by the frictional heat passes through the metal (M) and does not recut the metal (M) for a longer time. (121) There is an advantage that the service life can be extended. In other words, in cutting the metal M of the same bar, the band saw 121 has a longer length than the circular saw blade in contact with the metal M, compared to the number of times the circular saw blade is in contact with the metal M. The number of times is small, and the time between the parts of the band saw 121 is in contact with the next contact is long, so that the temperature management of the band saw 121 is easy and the number of times of use is small, thereby extending the life.

FIG. 5 is a view for explaining a metal in a state of being released while the chuck and the protrusion are separated, and FIG. 6 is a view for explaining a transfer unit.

1 to 6, after the cutting step S12, the transfer step S13 moves the band saw 121 upward, and moves the chuck 111 to release the metal M from being fixed. Thereafter, the metal M loaded on the work table T by the transfer part 13 is transferred by a predetermined distance in the direction perpendicular to the portion adjacent to the metal M in the band saw 121.

In more detail, the band saw 121 (or the wheel W connected to the band saw 121 or the housing H in which the wheel W is disposed inward) is moved upward by the lifting unit 12. The metal M is released by moving the chuck 111 in the direction away from the protrusion T1 (9 o'clock based on FIG. 5) while simultaneously moving to 11 o'clock based on 2.

Since the metal M loaded on the work table T by the transfer part 13 is adjacent to the metal M in the band saw 121 (the band saw 121 is moved upward by the lifting unit 12). In the state is moved by a predetermined distance along the direction orthogonal to (eg, the longitudinal direction of the metal (M) rod) of the most adjacent band saw 121 located in the normal direction of the metal (M). In order to continuously cut the metal M by the metal cutting method, the transfer part 13 may transfer the metal M toward one direction (for example, the 6 o'clock direction with reference to FIG. 5).

Here, the transfer unit 13 may be a hydraulic cylinder, the above-described control unit 18 controls the lifting unit 12 after the cutting step (S12) to move the band saw 121 in the upward direction, the drive unit 11 Control the chuck 111 to move in a direction away from the protrusion T1, and then the transfer unit 13 transmits a control signal to the transfer unit 13 to transfer the metal M by a predetermined distance along one direction. can do.

Referring to FIG. 1, the metal cutting method repeats the fixing step S11 and the cutting step S12 after the transfer step S13. That is, the fixing step S11, the cutting step S12, and the transfer step S13 are one cycle, and as one cycle is repeated, the fixing step S11, the cutting step S12, and the transfer step S13 are repeatedly performed. By cutting the metal (M) of the bar by a predetermined length is to be able to continuously manufacture the finished product (M1) having a predetermined length.

FIG. 7 is a view for explaining a circulation part and a waste cutting oil storage part, FIG. 8 is a view for explaining a waste cutting oil storage part and a screw impeller, and FIG. 9 is a view for explaining a cutting chip storage part.

1 to 9, the cutting step (S12) is a cutting oil spraying step of spraying cutting oil onto the band saw 121 by an injection nozzle 141 provided in the gripping portion 14 that grips the band saw 121. It may include. As described above, the holding part 14 is provided at the front end of the metal M based on the advancing direction of the portion adjacent to the metal M in the band saw 121. Referring to FIGS. 2 and 3, the band saw ( Since 121 rotates in a counterclockwise direction, the metal 121 is disposed adjacent to the metal M at the left side (8 o'clock based on FIG. 2 and 9 o'clock based on FIG. 3) based on the metal M. Referring to FIG. Therefore, the injection nozzle 141 may be provided in the gripping portion 14 to spray the cutting oil to the band saw 121 traveling toward the metal M side (at 3 o'clock based on FIG. 3). Cutting oil is injected into the band saw 121 for cutting the metal (M) to reduce the frictional heat between the band saw 121 and the metal (M), to suppress the deformation of the band saw 121 and the surface of the cut metal (M) It is to make (cutting surface) beautiful.

1 to 10, the metal cutting device 1 may include a waste cutting oil storage unit 15 for storing used waste cutting oil. Here, the used cutting oil is a cutting oil injected to the band saw 121 is moved in the downward direction (7 o'clock based on Figure 7), it may include a cutting chip (C) to be described later. Herein, the cutting chip C may be the saw blade of the metal M or the band saw 121 as the powder that is released during the cutting of the metal M.

The waste coolant storage unit 15 will be described in more detail. The waste coolant storage unit 15 may include an upper waste coolant storage unit 151, a plate 152, and an upper waste coolant storage unit 151. When the cutting oil sprayed in the cutting step S12 moves downward (7 o'clock based on FIG. 7) through the band saw 121 or the metal M, the upper waste cutting oil storage part provided in the cutting table T is provided. 151 (stored in the waste cutting oil storage unit 15 provided at the 9 o'clock position relative to the protrusion T1 in FIG. 7), and is provided at one end (lower end) of the upper waste cutting oil storage unit 151, but is downward. Through the inclined plate 152 may be finally stored as the lower waste cutting oil storage unit 153 provided on the lower side relative to the upper waste cutting oil storage unit 151. The upper waste cutting oil storage unit 151 may be inclined such that one end connected to the plate 152 is provided below the other end (upper end) in a direction opposite to the one end connected to the plate 152.

In addition, the metal cutting device 1 may include a circulating part 16 for resupplying the used waste cutting oil, which has been stored (stored) in the waste cutting oil storage part 15, to the injection nozzle 141. For example, the circulation part 16 is in contact with the used waste cutting oil stored in the waste cutting oil storage part 15, and the other end is connected to the injection nozzle 141, and the hose is connected to the hose through one end of the hose. It may be provided with a pump (not shown) to suck the used waste cutting oil and to move to the other end. As described above, the circulation unit 16 may be controlled by the controller 18, but the pump (not shown) is driven in response to the control signal of the controller 18.

As described above, the used waste cutting oil may include cutting chips C ()), and when the used waste cutting oil is re-supplied to the injection nozzle 141 by the circulation unit 16, the used waste When the cutting oil (C) is included in the cutting oil effect by the used waste cutting oil that is injected by the injection nozzle 141 (cutting oil is injected to the band saw 121 for cutting the metal (M) to the band saw 121 and the metal) By reducing the frictional heat of (M), it is possible to reduce the deformation of the band saw 121 and to make the surface of the cut metal (M) beautiful). In addition, the cutting chip (C) itself is generated by cutting in the metal (M) or band saw 121 needs to be separated from the waste cutting oil used for reuse again.

Therefore, the metal cutting device 1 includes a cutting chip storage unit 17, and one end of the metal cutting device 1 moves the cutting chip C included in the used waste cutting oil to the cutting chip storage unit 17. It may include a screw impeller (S) in contact with the bottom of the portion 15 and rotated by an upwardly inclined axis (X). In addition, the cutting chip storage unit 17 may be provided at the lower end of the other end of the screw impeller (S). Here, the axis X may be rotated such that the cutting chip C is moved upward by the second motor (not shown). As described above, the second motor (not shown) may be driven in response to the control signal of the controller 18.

8 and 9, the cutting thread of one end (lower end) of the screw impeller S is in contact with the bottom of the waste cutting oil storage unit 15, and the cutting chip C is used waste. Since the specific gravity is greater than the cutting oil, it sinks to the bottom of the waste cutting oil storage part 15. At this time, the shaft (X) is rotated in a direction in which the cutting thread of one end (lower end) of the screw impeller (S) is spaced apart from the waste cutting oil storage part 15 to rotate the waste cutting oil storage part 15 (lower waste cutting oil). The cutting chip C loaded on the bottom of the storage part 153 is loaded on the cutting thread of one end (lower end) of the screw impeller S. Thereafter, the axis X is repeatedly rotated so that the cutting chip C loaded on the cutting thread of the one end (lower end) is moved upward (two o'clock based on FIG. 8). At this time, the bottom of the lower waste coolant storage unit 153 is in contact with or adjacent to the screw impeller (S), when described in more detail in an inclined state, the portion where the one end (lower end) of the screw impeller (S) (Fig. As it progresses toward 8 o'clock based on 8, it is inclined downward (7 o'clock based on FIG. 8). Therefore, the cutting chip C of the lower waste cutting oil storage unit 153 is a portion where the one end (lower end) of the screw impeller S contacts the bottom of the lower waste cutting oil storage unit 153 (lower waste cutting oil storage unit 153). ) Is loaded on the incision thread of one end (lower end) of the screw impeller S as the shaft X rotates in the state of being loaded at the lowest height). To go to.

At this time, the screw impeller (S) may be curved upward as it proceeds in the outer radial direction from the axis (X). As such, the screw impeller (S) is curved upward as it progresses in the outer radial direction from the axis (X), so that the cutting chip (C) loaded on the screw impeller (S) is a screw impeller even after repeated rotation of the axis (X) ( There is an advantage that the upward direction can be easily moved without departing from S). In addition, the screw impeller (S) is inclined relative to the ground, and as the axis (X) is repeatedly rotated, the cutting chip (C) loaded on the bottom of the lower waste coolant storage part (153) is easily screw impeller (S). There is an advantage that it can be loaded on the cutting thread of one end (lower end) of the head).

The cutting chip C moved in the upward direction (2 o'clock based on FIG. 8) according to the repeated rotation of the screw impeller S is the cutting end thread of the other end (upper end) of the screw impeller S. When the incision thread of the (upper end) faces the lower direction (5 o'clock based on FIGS. 8 and 9), it is displaced on the incision thread of the other end (upper end) by gravity and is lowered (see FIGS. 8 and 9). 5 direction), it can be stored (loaded) in the cutting chip storage part 17 provided below the other end (upper end) of the screw impeller S (refer FIG. 9). 9, the other end (upper end) of the screw impeller S is accommodated inside the frame F. As shown in FIG.

As such, the metal cutting device 1 includes a circulation part 16 to reuse the cutting oil, but contact the bottom of the waste cutting oil storage part 15 with the screw impeller S rotating by the upwardly inclined axis X. By including the), the cutting chip (C) included in the used waste cutting oil is separated and stored in the cutting chip storage unit 17 to reuse the cutting chip (C), it is supplied to the injection nozzle 141 Removing the cutting chip (C) from the used waste cutting oil is an advantage that can improve the cooling efficiency of the used waste cutting oil injected from the injection nozzle 141.

11 is a diagram for explaining a protective film.

1 to 11, as described above, the metal cutting method is performed by repeating the fixing step S11, the cutting step S12, and the transfer step S13, and thus the fixing step S11 is also repeatedly received. 111 is repeatedly reciprocated to contact the metal M. As shown in FIG. In addition, since the metal (M) must be fixed together with the protrusion (T1), a large load is repeatedly applied. Therefore, since the chuck 111 is exposed to harsh environments (such as a repetitive load environment, repeated impacts, etc.) due to its characteristics, deformation, breakage, and warpage may occur.

Therefore, the chuck 111 may further include a protective film G on its outer surface to protect it from the harsh environment.

Referring to FIG. 11 in detail, the chuck 111 further includes a protective film G provided on an outer surface of the chuck 111, and the protective film G includes the penetrating layer G1 and the penetrating layer G1 on the outer surface of the chuck 111. It may include a heat generating layer (G2) provided on the top of) and a protective layer (G3) provided on the heating layer (G2).

Such a protective film (G) has excellent buffering and waterproofing effects in itself, and in particular, when electricity is applied to the heat generating layer (G2), the protective film (G) is heated to about 300 ° C., so that the penetration layer (G1) is melted, and thus fine pores or fine bends on the outer surface thereof. By sintering after filling, it not only has improved bonding strength, but also prevents lifting, thereby providing more robust protection and waterproofing (in the accompanying drawings, the micropores and microflexes are exaggerated).

In a specific embodiment, the permeation layer (G1) comprises 20 parts by weight of a polyvinyl acetate-based low-shrinkant and 50 parts by weight of a pressure-sensitive adhesive containing hydrogenated rosenester resin and polybutene, relative to 100 parts by weight of polyethylene.

For each of the compositions, polyethylene was added from the petroleum naphtha, added as a thermoplastic resin, and adopted in that it was excellent in water resistance and had a melting point of about 130 ° C. Each composition of the permeation layer (G1) is determined based on 100 parts by weight of this polyethylene.

In addition, the polyvinyl acetate-based low shrinkage agent is added as an anti-shrinkage agent for preventing the phenomenon of excessive contraction during the sintering of the penetrating layer (G1), and lifting occurs. It is preferable that such a polyvinyl acetate-based low shrinkage agent is included in 20 parts by weight. If the polyvinyl acetate-based low shrinkage agent is less than the above range, the shrinkage preventing effect is insufficient.

The pressure-sensitive adhesive is added to impart adhesiveness to the penetrating layer (G1) to reinforce the binding force in micropores, fine bends, and the like, and particularly includes a hydrogenated ester of Resin and polybutene. . The hydrogenated lozenster contributes heat resistance after sintering while imparting initial adhesion, and polybutene imparts tackiness. It is preferable that such an adhesive contains 50 parts by weight, but when it is less than the above range, the adhesive force is lowered, and when it exceeds the above range, there is a problem that the adhesiveness after sintering is sharply decreased.

The permeation layer (G1) is formed by injecting each composition into a polyethylene solution at a temperature of 130 ° C. or higher at which polyethylene can be melted, followed by sintering.

Next, the heat generating layer G2 includes 200 parts by weight of silver and 200 parts by weight of a functional binder including titanium dioxide and molybdenum dioxide, based on 100 parts by weight of ruthenium dioxide. The heat generating layer (G2) is characterized in that it is applied to the upper portion of the penetration layer (G1) in the form of a paste.

For each composition, ruthenium dioxide is a transition group of platinum group, which is provided in powder form to form a heat generating layer (G2) in the form of a paste. When the ruthenium dioxide is excessively used, since the exothermic temperature is too high to damage the protective layer G3 to be described later, the ruthenium dioxide is preferably not more than 20% by weight relative to the total composition of the exothermic layer G2. Each composition of the exothermic layer G2 is determined based on 100 parts by weight of this ruthenium dioxide.

In addition, silver (Ag) is a transition metal, like ruthenium dioxide, and is provided in powder form to form a heat generating layer G2 in paste form. It is preferable that such silver is included in an amount of 200 parts by weight. When used below the above range, it is difficult for the heating layer G2 to have a sufficiently low resistance value for generating current, and when used over the above range, the heating temperature becomes excessive. There is.

And functional binders are added for the combination of ruthenium dioxide and silver, and additionally facilitate dispersal between the components and provide shortening of the exothermic saturation time and sustaining the exothermic effect. Functional binders include titanium dioxide and molybdenum disulfide. Titanium dioxide contributes to the sustaining of the exothermic effect. In particular, molybdenum disulfide is a compound in which the molar ratio of molybdenum and silicon is 1: 2. The heat generation layer (G2) is prevented from melting during heat generation, and silica is formed at a high temperature to shorten the heat generation effect and significantly shorten the heat generation saturation time. It is preferable that such a functional binder is included in 200 parts by weight, when used in less than the above range, the effect is insufficient expression, when used in excess of the above range occurs the problem of unstable electrical flow at high temperature exothermic.

The exothermic layer (G2) is ethylene glycol (terpene), butyl carbitol, ethyl cellosolve, ethyl benzene, isopropyl benzene, methyl ethyl ketone, dioxane, acetone, cyclohexanone, 3-methoxybutyl acetate, etc. It is prepared through a kneading process after mixing the compositions in an organic solvent.

Next, the protective layer G3 includes 300 parts by weight of a filler including calcium carbonate and bentonite, 100 parts by weight of naphthenic oil and 50 parts by weight of a heat resistant agent including barium aluminate and zirconia, relative to 100 parts by weight of butyl synthetic rubber. do.

For each composition, butyl synthetic rubber was employed in that it had appropriate cold resistance and heat resistance, was relatively high in elasticity, and was excellent in thermal insulation effect. The protective layer (G3) is determined based on 100 parts by weight of butyl synthetic rubber.

And fillers include calcium carbonate and bentonite, calcium carbonate is used to add waterproofness, bentonite has a relatively good cation exchange capacity is possible to bond firmly, if the crack occurs in the protective layer (G3), moisture absorption It has the effect of preventing leakage while expanding through. In particular, the fillers are all composed of a composition having excellent binding strength can be made excellent compatibility between the protective layer (G3) and the penetration layer (G1). Such fillers are not particularly limited in use, but it is preferable to include 300 parts by weight in terms of increasing the bonding strength and economics.

And naphthene oil was added as a plasticizer, and it was employ | adopted in the point that there is little evaporation loss at high temperature, it is excellent in cold resistance, and can add an elastic retention effect. It is preferable that such naphthenic oil contains 100 parts by weight, and when used below the above range, flexibility and workability are lowered, and when it is used above the above range, the viscosity is excessively lowered so that the operation of the heating layer G2 is performed. Falling occurs in the air and a crying phenomenon of the protective layer G3 occurs.

And the heat resistant agent is added to add heat resistance so that the protective layer (G3) to withstand the heat generated by the heat generating layer (G2) without melting, in particular, the protective layer (G3) to withstand even at a high temperature of 300 ℃ or more. The heat resistant agent includes barium aluminate and zirconia, which is added as a binder for combining zirconia with other compositions, and zirconia has a melting point of about 2700 ° C., excellent resistance to rapid temperature changes, and at least 1000 It is added to allow the protective layer G3 to withstand low thermal conductivity, heat resistance, and fire resistance even at a high temperature of more than ℃. In particular, by the heat resistant agent, the protective layer G3 has a plurality of internal pores, and these pores lower the thermal conductivity and add heat resistance. It is preferable that such a heat resistant agent contains 50 parts by weight, but when used outside the above range, a phenomenon in which the heat resistance is rather deteriorated.

The protective layer (G3) is prepared by mixing the naphthene oil with each composition in powder form, and may further include a predetermined functional additive as necessary.

In the embodiment relating to the construction of the protective film (G), the penetrating layer (G1) is laminated on the test block formed with the fine pores and fine bends, the heat generating layer (G2) is applied on the upper part, and then the protective layer on the top After stacking (G3), electricity was applied to the heat generating layer (G2) to form a protective film (G). As a result of cutting the test block having the protective film G formed thereon and observing the cross section enlarged, it was confirmed that the penetration layer G1 penetrated into the micropores and the fine bends and cured. In addition, the cross-cut test, scratching test, and internal invasiveness test through water spraying were performed on the formed protective film G, and the peeling rate was less than 0.5%, and the breaking rate was less than 3%. No invasion was detected at all.

The present invention described with reference to the accompanying drawings may be variously modified and changed by those skilled in the art, and such variations and modifications should be construed as being included in the scope of the present invention.

Metal cutting device: 1
Worktable: T
Protrusion: T1
Metal: M
Wheel: W
Housing: H
Drive part: 11
Chuck: 111
Lift: 12
Band Saws: 121
Feed section: 13
Grips: 14
Nozzle Nozzle: 141
Waste coolant storage: 15
Upper waste coolant reservoir: 151
Plate: 152
Lower waste coolant storage: 153
Circulation: 16
Cutting chip storage: 17
Cutting chip: C
Axis: X
Screw impeller: S
Frame: F
Control Unit: 18

Claims (4)

In the metal cutting method by a metal cutting device,
A fixing step of fixing the metal loaded on the work table by moving the chuck by the driving unit;
A cutting step of cutting the metal by moving the band saw moving in one direction in a downward direction by a lifting unit connected to each of the wheels provided on both sides of the metal and rotating in one direction;
After the cutting step, the band saw is moved upwards, the chuck is moved to release the fixing of the metal, and then the metal loaded on the work table by a transfer unit is orthogonal to the portion adjacent to the metal in the band saw. A transfer step of transferring a predetermined distance;
Including,
Repeating the fixing step and the cutting step after the conveying step,
And the screw impeller is curved upward as the radially outward direction of the shaft.
The method according to claim 1,
The cutting step includes a cutting oil spraying step of spraying the cutting oil to the band saw by an injection nozzle provided in the gripping portion for holding the band saw,
The metal cutting device further includes a waste cutting oil storage unit for storing the used waste cutting oil and a circulation unit for resupplying the used waste cutting oil to the injection nozzle,
The metal cutting device further includes a screw impeller whose one end contacts the bottom of the waste cutting oil storage portion and rotates by an upwardly inclined shaft to move the cutting chip included in the used waste cutting oil to the cutting chip storage portion. The cutting chip storage unit is a metal cutting method, characterized in that provided on the lower side of the other end of the screw impeller.
delete The method according to claim 1,
The chuck includes a protective film on the outer surface, the protective film includes a penetrating layer in contact with the outer surface of the chuck, a heating layer provided on the upper layer and the protective layer provided on the heating layer,
The penetrating layer comprises 20 parts by weight of polyvinyl acetate-based low-shrinkant and 50 parts by weight of a pressure-sensitive adhesive containing hydrogenated Rosenster resin and polybutene, based on 100 parts by weight of polyethylene,
The heat generating layer includes 200 parts by weight of silver and 200 parts by weight of a functional binder including titanium dioxide and molybdenum dioxide, based on 100 parts by weight of ruthenium dioxide,
The protective layer comprises 300 parts by weight of a filler containing calcium carbonate and bentonite, 100 parts by weight of naphthenic oil and 50 parts by weight of a heat resistant agent including barium aluminate and zirconia, relative to 100 parts by weight of butyl synthetic rubber. Metal cutting method.

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