Circular saw cutting machine

Abstract

Provided is a circular saw cutting machine that sufficiently lubricates the outer peripheral blade of a circular saw and has little scattering of cutting oil. 【Solution means】According to the circular saw cutting machine 10, the circular saw lubrication device 22 includes a lubricating box 52 that forms a lubrication space LS at a position where the outer peripheral blade of the circular saw 20 passes, and a lubricating oil mist supply device 54 that supplies mist-like lubricating oil MF into the lubricating box 52 and retains the mist-like lubricating oil MF. Therefore, a circular saw cutting machine 10 that sufficiently lubricates the outer peripheral blade of the circular saw 20 and has little scattering of cutting oil can be obtained.

Description

Technical Field

[0001] The present invention relates to a circular saw cutting machine that sufficiently lubricates the outer peripheral blade of a circular saw using mist-shaped cutting oil and has little scattering of the cutting oil.

Background Art

[0002] In a circular saw cutting machine including a disc-shaped circular saw having a plurality of outer peripheral blades arranged in the circumferential direction, a mist injection device that injects mist-shaped cutting fluid toward the circular saw, a circular saw rotation drive device that rotationally drives the circular saw, and a circular saw moving device that moves the circular saw toward a metal workpiece to cut into the workpiece, there is known a circular saw lubricating device that sufficiently supplies mist-shaped cutting fluid to the rake face of the outer peripheral blade of the circular saw, washes chips adhering to the rake face of the outer peripheral blade, and sufficiently obtains lubrication between the outer peripheral blade and the workpiece to sufficiently increase the life of the circular saw. For example, the one described in Patent Document 1 is such a device.

[0003] According to such a circular saw cutting machine, the amount of cutting fluid used can be reduced, and further, a large tank for storing the cutting fluid, a pump for circulating it, a filtering device for filtering, etc. are not required. Therefore, the equipment cost and the operation cost can be reduced.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the above-described conventional circular saw cutting machine, since a part of the cutting oil jetted from the mist jetting device scatters, the cutting oil adheres to the periphery of the cutting machine and becomes sticky, and the chips stick to the circular saw cutting machine or contaminate the floor surface or the like, so frequent cleaning has been required. Further, since a part of the cutting oil jetted in a mist form stays in the air, the working environment deteriorates and waste of the cutting oil occurs.

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to provide a circular saw cutting machine that sufficiently lubricates the outer peripheral blade of the circular saw and has little scattering of cutting oil.

Means for Solving the Problems

[0007] As a result of various studies by the present inventor in view of the above circumstances, a relatively closed lubrication space through which the outer peripheral blade of the circular saw passes is provided, and mist-like cutting oil is introduced into the lubrication space to increase the density of the mist-like cutting oil. It has been found that when the outer peripheral blade of the circular saw is passed through the inside of the lubrication space, the scattering of the cutting oil is small and the outer peripheral blade of the circular saw is sufficiently lubricated. The present invention has been made based on such findings.

[0008] That is, the gist of the first invention is: (a) a disk-shaped circular saw having a plurality of outer peripheral blades arranged in the circumferential direction on the outer peripheral portion of the base metal, A circular saw cover that covers a part of the circular saw, a circular saw lubricating device for lubricating the outer peripheral blade of the circular saw using mist-like lubricating oil, a circular saw rotation driving device for rotationally driving the circular saw, and a circular saw moving device for moving the circular saw toward a metal workpiece to be cut to cut into the workpiece, the circular saw cutting machine comprising: (b) the circular saw lubricating device which is provided inside the circular saw cover, a lubricating box that forms a lubrication space at a position where the outer peripheral blade of the circular saw passes, and a lubricating oil mist supply device that supplies mist-like lubricating oil into the lubricating box and retains the mist-like lubricating oil in the lubrication space in the lubricating box. , (c) The lubricating oil mist supply device includes a lubricating oil mist generator that generates the mist-like lubricating oil, and an introduction pipe that introduces the mist-like lubricating oil from the lubricating oil mist generator into the lubricating space inside the lubricating box. It is to be provided.

[0009] The gist of the second invention is that, in the first invention, the lubricating box includes an inlet slot portion through which the outer peripheral blade of the circular saw enters the lubricating space, and an outlet slot portion through which the outer peripheral blade of the circular saw exits the lubricating space, and is disposed so as to straddle the outer peripheral blade of the circular saw.

[0010] The gist of the third invention is that, in the second invention, at least the outlet slot portion of the lubricating box, among the inlet slot portion and the outlet slot portion, is provided with a lubricating seal member composed of brushes that are raised so as to approach each other and be in contact with the circular saw from the inner wall surfaces facing each other of the lubricating box. with the circular saw sandwiched therebetween

[0011] The gist of the fourth invention is that, in the second invention, The introduction pipe the mist-like lubricating oil from the lubricating oil mist generator is introduced from the outlet slot portion toward the inlet slot portion. such that

[0012] The gist of the fifth invention is that, in the first invention, the lubricating box includes an inner peripheral elastic seal having elastic lips that are fixed to the inner peripheral portions of the inner wall surfaces of the lubricating box that face each other with the circular saw therebetween, and that project so as to approach each other and be in contact with the circular saw. of the circular saw inner circumference side end

[0013] The gist of the sixth invention is that, in the first invention, the lubricating box includes an outer peripheral elastic seal having elastic lips that are fixed to the outer peripheral portions of the inner wall surfaces of the lubricating box that face each other with the circular saw therebetween, and that approach each other so as to be in contact with each other. of the circular saw outer circumference side end

[0014] The gist of the seventh invention is that (a) A circular saw cutting machine comprising a disc-shaped circular saw having a plurality of outer peripheral blades arranged in the circumferential direction on the outer peripheral portion of a base metal, a circular saw lubricating device that lubricates the outer peripheral blades of the circular saw using mist-like lubricating oil, a circular saw rotation driving device that rotationally drives the circular saw, and a circular saw moving device that moves the circular saw toward a metal workpiece to be cut to cut into the workpiece. (b) The circular saw lubricating device includes a lubricating box that forms a lubricating space at a position where the outer peripheral blades of the circular saw pass through, and a lubricating oil mist supply device that supplies mist-like lubricating oil into the lubricating box and retains the mist-like lubricating oil in the lubricating space inside the lubricating box. (c) the circular saw is located between a pair of first saw covers and second saw covers that are connected so as to be openable and closable via a hinge located on the side opposite to the cutting position of the circular saw with respect to the rotation center of the circular saw, and is covered by the first saw cover and the second saw cover. (d)The lubricating box is composed of a first wall portion and a second wall portion that are divided by a plane parallel to the circular saw. (e) The first wall portion and the second wall portion are respectively fixed to the first saw cover and the second saw cover. (f) When the first saw cover and the second saw cover are closed, the lubricating box is constituted by the first wall portion and the second wall portion.

Advantages of the Invention

[0015] According to the circular saw cutting machine of the first invention, the circular saw lubricating device which is provided inside the circular saw cover, includes a lubricating box that forms a lubricating space at a position where the outer peripheral blade of the circular saw passes through, and a lubricating oil mist supply device that supplies mist-like lubricating oil into the lubricating box and retains the mist-like lubricating oil in the lubricating space in the lubricating box. , The lubricating oil mist supply device includes a lubricating oil mist generator that generates mist-like lubricating oil, and an introduction pipe that introduces the mist-like lubricating oil from the lubricating oil mist generator into the lubricating space inside the lubricating box. Therefore, a circular saw cutting machine that sufficiently lubricates the outer peripheral blade of the circular saw and has less scattering of cutting oil can be obtained.

[0016] According to the circular saw cutting machine of the second invention, the lubricating box includes an inlet slot portion through which the outer peripheral blade of the circular saw enters the lubricating space and an outlet slot portion through which the outer peripheral blade of the circular saw exits the lubricating space, and is arranged so as to straddle the outer peripheral blade of the circular saw. Thereby, the lubricating space becomes a relatively sealed space in the lubricating box, the density of the mist-like lubricating oil is increased, and the scattering of the cutting oil is reduced.

[0017] According to the circular saw cutting machine of the third invention, the lubricating box is provided with a lubricating seal member composed of brushes that are raised so as to approach and contact each other from the inner wall surfaces facing each other of the lubricating box toward the circular saw at at least the outlet slot portion of the inlet slot portion and the outlet slot portion. Thereby, the sealing property of the outlet slot portion on the side where the outer peripheral blade of the circular saw exits to the outside among the inlet slot portion and the outlet slot portion through which the outer peripheral blade of the circular saw passes is enhanced, so that a relatively sealed space is formed in the lubricating box, the density of the mist-like lubricating oil is increased, and the scattering of the cutting oil is reduced. Further, since lubricating oil is supplied from the brushes that contact the outer peripheral blade of the circular saw, the lubricity of the outer peripheral blade of the circular saw is further enhanced. with the circular saw sandwiched therebetween

[0018] According to the circular saw cutting machine of the fourth invention, The introduction pipe The mist-like lubricating oil is introduced from the lubricating oil mist generator from the outlet slot to the inlet slot. such that As a result, the lubricating oil is introduced in mist form from the introduction pipe from the exit slot portion to the entrance slot portion, opposite the direction of movement of the peripheral blade of the circular saw, thereby reducing scattering of cutting oil.

[0019] According to the circular saw cutting machine of the fifth invention, the lubrication box has inner wall surfaces facing each other with the circular saw in between. of the circular saw Inner circumference side end The lubrication box is provided with an inner elastic seal having elastic lips that are fixed to the inner and outer peripheral portions of the cutting oil mist and that come close to each other and protrude so as to be able to contact the circular saw. This makes the lubrication space inside the lubrication box even more sealed, increasing the density of the mist of lubricating oil and reducing the scattering of cutting oil.

[0020] According to the circular saw cutting machine of the sixth aspect of the present invention, the lubrication box has inner wall surfaces facing each other with the circular saw in between. of the circular saw Outer circumference side end The lubrication space is made more sealed inside the lubrication box, increasing the density of the mist of lubricating oil and reducing the scattering of cutting oil.

[0021] According to the circular saw cutting machine of the seventh invention, A circular saw cutting machine comprising a disc-shaped circular saw having a plurality of outer peripheral blades arranged in the circumferential direction on the outer peripheral portion of a base metal, a circular saw lubricating device that lubricates the outer peripheral blades of the circular saw using mist-like lubricating oil, a circular saw rotation driving device that rotationally drives the circular saw, and a circular saw moving device that moves the circular saw toward a metal workpiece to be cut to cut into the workpiece. The circular saw lubricating device includes a lubricating box that forms a lubricating space at a position where the outer peripheral blades of the circular saw pass through, and a lubricating oil mist supply device that supplies mist-like lubricating oil into the lubricating box and retains the mist-like lubricating oil in the lubricating space inside the lubricating box. The circular saw is located between and covered by a pair of first and second saw covers connected openably and closably via a hinge located on the opposite side of the cutting position of the circular saw with respect to the center of rotation of the circular saw, and the lubrication box is composed of a first wall portion and a second wall portion divided by a plane parallel to the circular saw, the first wall portion and the second wall portion are fixed to the first saw cover and the second saw cover, respectively, and when the first saw cover and the second saw cover are closed, the first wall portion and the second wall portion form a lubrication box. This makes it easy to attach the lubrication box to the circular saw cutting machine while straddling the peripheral blade of the circular saw when replacing the circular saw. [Brief description of the drawings]

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0023] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are appropriately simplified or deformed, and the dimensional ratios and shapes of each part are not necessarily drawn accurately.

Example

[0024] FIG. 1 is a front view showing a swing type circular sawing machine 10 according to an embodiment of the present invention. In FIG. 1, the circular sawing machine 10 intermittently feeds a workpiece 14 supplied from a feeding device (not shown) disposed on the back side of the circular sawing machine 10 shown in FIG. 1 on a base 12 by a predetermined dimension in the longitudinal direction for each cutting, that is, moves it in a direction parallel to the axis O1 of the workpiece 14. A material sizing feed device 16, an upper end of a tilting member 19 whose lower end is rotatably provided around a rotation center C1 by a support base 18 via a support shaft 17, a disk-shaped circular saw 20 rotatably provided around a rotation center C2, a circular saw lubricating device 22 that lubricates the outer peripheral blade of the circular saw 20 using mist-like lubricating oil MF, a circular saw rotation drive device 24 that continuously rotationally drives the circular saw 20, and a circular saw moving device 26 that moves the circular saw 20 toward the workpiece 14 in order to cut the circular saw 20 into the metal workpiece 14. The workpiece 14 in this embodiment is a round bar-shaped metal material and is arranged to be longitudinal in a direction perpendicular to the plane of the paper in FIG. 1.

[0025] The material sizing feed device 16 includes a work table 28 on which the workpiece 14 is placed, a movable clamping device (not shown) that clamps the workpiece 14 and moves it by a predetermined dimension in a direction parallel to the axis O1, and a horizontal clamping device 30 and a vertical clamping device 32 that fix the position of the workpiece 14 on the work table 28.

[0026] The horizontal clamping device 30 includes a hydraulic cylinder (not shown) having a piston that can reciprocate in a direction orthogonal to the axis O1 of the workpiece to be cut 14 and parallel to the upper surface (workpiece placement surface) of the worktable 28, i.e., in the direction of arrow a in FIG. 1, and a clamping pad 36 fixed to the tip of a moving member 34 that is connected to the piston rod of the hydraulic cylinder and can move in the direction of arrow a. This horizontal clamping device 30 operates the hydraulic cylinder to advance the clamping pad 36 toward the workpiece to be cut 14, thereby clamping and fixing the workpiece to be cut 14 between the clamping pad 36 and the backing plate 38. The backing plate 38 is fixedly provided on the worktable 28 on the side opposite to the clamping pad 36 of the workpiece to be cut 14. Note that the horizontal clamping device 30 releases the fixation of the workpiece to be cut 14 when the workpiece to be cut 14 is moved by the movable clamping device.

[0027] The vertical clamping device 32 includes a hydraulic cylinder 40 having a piston that can reciprocate in a direction orthogonal to the axis O1 of the workpiece to be cut 14 and perpendicular to the upper surface (placement surface of the non-cut workpiece) of the worktable 28 on the side opposite to the worktable 28 of the workpiece to be cut 14, i.e., in the direction of arrow b in FIG. 1, and a clamping pad 42 fixed to the tip of the piston rod of the hydraulic cylinder 40. The vertical clamping device 32 operates the hydraulic cylinder 40 to advance the clamping pad 42 toward the workpiece to be cut 14, thereby clamping and fixing the workpiece to be cut 14 between the clamping pad 42 and the worktable 28. The vertical clamping device 32 releases the fixation of the workpiece to be cut 14 when the workpiece to be cut 14 is moved by the movable clamping device. The fixation of the workpiece to be cut 14 by the vertical clamping device 32 is preferably performed after the fixation of the workpiece to be cut 14 by the horizontal clamping device 30.

[0028] FIG. 2 is an enlarged view showing a part of the circular saw 20 shown in FIG. 1. As shown in FIG. 2, the circular saw 20 includes a disk-shaped base metal 44 and a plurality of cemented carbide tips 46 that are arranged at regular intervals in the circumferential direction on the outer peripheral portion of the base metal 44 and are fixed to the base metal 44 by, for example, brazing. The cemented carbide tips 46 constitute a plurality of outer peripheral blades of the circular saw 20. As shown in FIG. 1, the base metal 44 is integrally fixed to the rotation shaft 47, and is rotatably supported around the rotation center C2 by the tilting member 19 via the rotation shaft 47. L in FIG. 2 indicates the rotation locus of the blade portion formed on the cemented carbide tip 46 of the circular saw 20. In FIG. 1, the front cover 80 of the circular saw cover 76 covering the circular saw 20 is shown with a part cut out.

[0029] Returning to FIG. 1, the circular saw rotation drive device 24 includes a rotation shaft 47 that rotatably supports the circular saw 20 around the rotation center C2, a circular saw drive motor 62 as a power source for rotationally driving the circular saw 20, and a transmission member (not shown) such as a pulley and a belt for transmitting the rotation of the output shaft of the circular saw drive motor 62 to the rotation shaft 47. The circular saw drive motor 62 is fixed to the tilting member 19. By operating the circular saw drive motor 62 and transmitting the rotation of its output shaft to the rotation shaft 47 via the transmission member, the circular saw rotation drive device 24 rotationally drives the circular saw 20 in the direction of arrow c.

[0030] The circular saw moving device 26 drives a first support member 66 fixed to the upper surface of a machine base 64 integrated with a work table 28 for fixing a workpiece 14 and a second support member 68 fixed to the upper part of a tilting member 19 that supports the circular saw 20 so as to approach and separate from each other. Specifically, the circular saw moving device 26 includes a hollow cylindrical support member 70 rotatably supported about a rotation center C3 by the first support member 66, and an electric drive servo motor 72 having a ball screw-shaped rotation output shaft substantially concentric with the axis of the support member 70 and fixed to an end of the support member 70 on the side opposite to the second support member 68. One end of the circular saw moving device 26 is screwed to the outer peripheral side of the ball screw rotation output shaft and supported by the inner peripheral surface of the support member 70 so as to be movable in the axial direction and non-rotatable about the axis, and the other end is supported by the second support member 68 so as to be rotatable about a rotation center C4 parallel to the rotation center C3. The circular saw moving device 26 operates the servo motor 72 to move the axial movement member 74 connected to the upper part of the tilting member 19 via the second support member 68 in the axial direction thereof, that is, in the direction of arrow d in FIG. 1, thereby tilting the tilting member 19 in the direction of arrow e in FIG. 1.

[0031] The circular saw lubrication device 22 is provided inside the circular saw cover 76, and includes a lubrication box 52 that forms a lubrication space LS at a position where the cemented carbide tips 46 that constitute the outer peripheral blade of the circular saw 20 pass through, and a lubricating oil mist supply device 54 that supplies mist-like lubricating oil MF into the lubrication box 52 and retains the mist-like lubricating oil MF in the lubrication space LS inside the lubrication box 52. The lubricating oil mist supply device 54 includes a lubricating oil mist generator 56 that generates mist-like lubricating oil MF, and an introduction pipe 58 that introduces the mist-like lubricating oil MF from the lubricating oil mist generator 56 into the lubrication box 52 from the outlet slot portion 94 toward the inlet slot portion 92. The lubricating oil mist generator 56 includes, for example, a cutting fluid tank (not shown) that stores the lubricating oil MF, a compressor (not shown) that generates compressed air, and an ejector (not shown) that introduces a mixture of the lubricating oil in the cutting fluid tank and the compressed air from the compressor into the lubrication box 52 through the introduction pipe 58. As a result, mist-like lubricating oil MF stays inside the lubrication box 52, and the concentration of the lubricating oil MF is maintained at a high level. As the mist-like lubricating oil MF, vegetable oil, animal oil, mineral oil, synthetic oil, or a mixed oil thereof may be used.

[0032] Figure 3 shows a state where the circular saw cover 76 is opened. The circular saw cover 76 is configured to be openable and closable from a front cover 80 and a rear cover 82 that are rotatably connected via a hinge 78 located on the side opposite to the cutting position of the circular saw 20 with respect to the rotation center C2 of the circular saw 20. The rear cover 82 is fixed to the tilting member 19. The front cover 80 and the rear cover 82 correspond to the first saw cover and the second saw cover.

[0033] The lubrication box 52 is composed of a plate-shaped first wall portion 84 and a second wall portion 86 that are divided by a plane parallel to the circular saw 20 and form a lubrication space LS therebetween. The first wall portion 84 and the second wall portion 86 are respectively fixed to the front cover 80 and the rear cover 82. When the front cover 80 and the rear cover 82 are closed, the lubrication box 52 as shown in FIG. 4, for example, is configured by the first wall portion 84 and the second wall portion 86. In FIG. 3, the front cover 80 and the rear cover 82 are fastened by bolts (not shown) using bolt holes 90 in a state where their respective mating surfaces 88 are in close contact with each other.

[0034] FIG. 5 shows the second wall portion 86 respectively fixed to the rear cover 82 of the lubrication box 52. FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5, and FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 5. As shown in FIGS. 5 to 7, the lubrication box 52 includes an inlet slot portion 92 through which the outer peripheral blade of the circular saw 20 enters the lubrication space LS and an outlet slot portion 94 through which the outer peripheral blade of the circular saw 20 exits the lubrication space LS, and is configured and arranged to straddle the outer peripheral blade of the circular saw 20. In the inlet slot portion 92 and the outlet slot portion 94 of the lubrication box 52, a lubrication sealing material 96 composed of a pair of brushes 95 that are raised so as to approach and contact each other from the opposing inner wall surfaces toward the outer peripheral blade of the circular saw 20 is respectively provided. By containing the lubricating oil MF, this lubrication sealing material 96 has high wear resistance and a high sealing function despite contacting the outer peripheral blade of the circular saw 20.

[0035] Inside the lubrication box 52, a strong air flow is formed along the moving direction of the outer peripheral blade of the circular saw 20, and the leakage of the mist-like lubricating oil MF supplied into the lubrication box 52 is less in the inlet slot portion 92 than in the outlet slot portion 94. For this reason, even if the lubrication sealing material 96 is not necessarily provided for the inlet slot portion 92, the concentration of the mist-like lubricating oil MF in the lubrication space LS is relatively maintained. Therefore, it is sufficient that the lubrication sealing material 96 is provided at least in the outlet slot portion 94 among the inlet slot portion 92 and the outlet slot portion 94.

[0036] Then, in order to enhance the sealing property within the lubrication space LS in the lubrication box 52, the lubrication box 52 includes an inner peripheral elastic seal 100 having elastic lips 98 that are fixed to the inner peripheral portions, i.e., the inner peripheral side end portions, of the first inner wall surface 84a and the second inner wall surface 86a of the first wall portion 84 and the second wall portion 86 that face each other across the outer peripheral blade of the circular saw 20 in the lubrication box 52, and that approach each other, project toward the outer peripheral side, and can contact the outer peripheral blade of the circular saw 20. Further, the lubrication box 52 includes an outer peripheral elastic seal 104 having elastic lips 102 that are fixed to the outer peripheral portions, i.e., the outer peripheral side end portions, of the first inner wall surface 84a and the second inner wall surface 86a of the first wall portion 84 and the second wall portion 86 that face each other across the outer peripheral blade of the circular saw 20 in the lubrication box 52, and that approach each other so as to be in contact with each other and project toward the outer peripheral side. The inner peripheral elastic seal 100 and the outer peripheral elastic seal 104 are made of a synthetic rubber such as neoprene, for example.

[0037] As shown in FIG. 6, within the lubrication box 52, a first discharge groove 106 and a second discharge groove 108 are respectively formed between the first wall portion 84 and the inner peripheral elastic seal 100 fixed thereto, and between the second wall portion 86 and the inner peripheral elastic seal 100 fixed thereto. The lubricating oil MF accommodated in the first discharge groove 106 and the second discharge groove 108 is discharged to the drain container 112 via the drain pipe line 110 as shown in FIG. 5.

[0038] In the circular saw cutting machine 10 configured as described above, first, the material to be cut 14 is supplied onto the work table 28 from a feeding device (not shown) by the material sizing and feeding device 16. Next, the material to be cut 14 is clamped and fixed by the horizontal clamping device 30 and the vertical clamping device 32. Then, the circular saw 20 rotationally driven by the circular saw rotational drive device 24 is moved toward the material to be cut 14 by the circular saw moving device 26. And while the mist-like lubricating oil MF is supplied into the lubricating box 52, the circular saw 20 is cut into the material to be cut 14 according to a preset cutting depth (moving speed). In such a process, since the outer peripheral blade of the circular saw 20 is passed through the lubricating space LS in the lubricating box 52 where the mist-like lubricating oil MF is confined at a high concentration, the lubrication between the rake face of the outer peripheral blade of the circular saw 20 and the chips is good, and the discharge of the chips is promoted. Also, since the mist-like lubricating oil MF does not scatter, the consumption efficiency of the cutting oil is increased, and the soiling due to the scattering of the cutting oil is suppressed, improving the working environment.

[0039] As described above, according to the circular saw cutting machine 10 of the present embodiment, the circular saw lubricating device 22 includes the lubricating box 52 that forms the lubricating space LS at the position where the outer peripheral blade of the circular saw 20 passes through, and the lubricating oil mist supply device 54 that supplies the mist-like lubricating oil MF into the lubricating box 52 and retains the mist-like lubricating oil MF. Therefore, a circular saw cutting machine 10 that sufficiently lubricates the outer peripheral blade of the circular saw 20 and has little scattering of the cutting oil can be obtained.

[0040] Also, according to the circular saw cutting machine 10 of the present embodiment, the lubricating box 52 includes an inlet slot portion 92 where the outer peripheral blade of the circular saw 20 enters the lubricating space LS and an outlet slot portion 94 where the outer peripheral blade of the circular saw 20 exits the lubricating space LS, and is disposed so as to straddle the outer peripheral blade of the circular saw 20. Thereby, the lubricating space LS becomes a relatively sealed space in the lubricating box 52, the density of the mist-like lubricating oil MF is increased, and the scattering of the cutting oil is reduced.

[0041] Moreover, according to the circular saw cutting machine 10 of the present embodiment, in the lubricating box 52, at least in the outlet slot portion 94 among the inlet slot portion 92 and the outlet slot portion 94, a lubricating seal member 96 is provided which is formed by brushes 95 that are raised so as to approach each other and be contactable from the inner wall surfaces facing each other in the thickness direction of the lubricating box 52 toward the outer peripheral blade of the circular saw 20. Thereby, among the inlet slot portion 92 and the outlet slot portion 94 through which the outer peripheral blade of the circular saw 20 passes, at least the sealing performance of the outlet slot portion 94 on the side where the outer peripheral blade of the circular saw 20 exits to the outside is enhanced. Therefore, the lubricating space LS in the lubricating box 52 becomes a relatively sealed space, the density of the mist-like lubricating oil MF is increased, and the scattering of the cutting oil is reduced. Further, since the lubricating oil MF is supplied from the brushes 95 that contact the outer peripheral blade of the circular saw 20, the lubricity of the outer peripheral blade of the circular saw 20 is further enhanced.

[0042] Moreover, according to the circular saw cutting machine 10 of the present embodiment, the lubricating oil mist supply device 54 includes a lubricating oil mist generator 56 that generates mist-like lubricating oil MF, and an introduction pipe 58 that introduces the mist-like lubricating oil MF from the lubricating oil mist generator 56 into the lubricating space LS in the lubricating box 52 from the outlet slot portion 94 toward the inlet slot portion 92. Thereby, the mist-like lubricating oil MF is introduced from the introduction pipe 58 so as to oppose the moving direction of the outer peripheral blade of the circular saw 20 from the outlet slot portion 94 toward the inlet slot portion 92, and thus the scattering of the cutting oil is reduced.

[0043] Moreover, according to the circular saw cutting machine 10 of the present embodiment, the lubricating box 52 is provided with an inner peripheral side elastic seal 100 having elastic lips 98 that are fixed to the inner peripheral portion of the inner wall surfaces of the lubricating box 52 that face each other with the outer peripheral blade of the circular saw 20 interposed therebetween, and that approach each other and are contactable with the outer peripheral blade of the circular saw 20. Thereby, the lubricating space LS becomes a more sealed space within the lubricating box 52, the density of the mist-like lubricating oil MF is increased, and the scattering of the cutting oil is reduced. end on the inner circumference side of the circular saw 20 Moreover, according to the circular saw cutting machine 10 of the present embodiment, the lubricating box 52 is provided with an inner peripheral side elastic seal 100 having elastic lips 98 that are fixed to the inner peripheral portion of the inner wall surfaces of the lubricating box 52 that face each other with the outer peripheral blade of the circular saw 20 interposed therebetween, and that approach each other and are contactable with the outer peripheral blade of the circular saw 20. Thereby, the lubricating space LS becomes a more sealed space within the lubricating box 52, the density of the mist-like lubricating oil MF is increased, and the scattering of the cutting oil is reduced.

[0044] Moreover, according to the circular saw cutting machine 10 of the present embodiment, the lubricating box 52 is provided with an inner peripheral side elastic seal 100 having elastic lips 98 that are fixed to the inner peripheral portion of the inner wall surfaces of the lubricating box 52 that face each other with the outer peripheral blade of the circular saw 20 interposed therebetween, and that approach each other and are contactable with the outer peripheral blade of the circular saw 20. Thereby, the lubricating space LS becomes a more sealed space within the lubricating box 52, the density of the mist-like lubricating oil MF is increased, and the scattering of the cutting oil is reduced. outer circumferenceside end of the circular saw 20 It is provided with an outer peripheral side elastic seal 104 having elastic lips 102 that are fixed to the part and approach each other. As a result, the lubrication space LS becomes a more sealed space within the lubrication box 52, the density of the mist-like lubricating oil MF is increased, and the scattering of the cutting oil is reduced.

[0045] Further, according to the circular saw cutting machine 10 of the present embodiment, the circular saw 20 is located between a pair of front covers (first saw covers) 80 and rear covers (second saw covers) 82 that are openably connected via a hinge 78 located on the side opposite to the cutting position of the circular saw 20 with respect to the rotation center C2 of the circular saw 20, and is covered by the front cover 80 and the rear cover 82. The lubrication box 52 is composed of a first wall portion 84 and a second wall portion 86 that are divided by a plane parallel to the circular saw 20. The first wall portion 84 and the second wall portion 86 are respectively fixed to the front cover 80 and the rear cover 82. When the front cover 80 and the rear cover 82 are closed, the lubrication box 52 is constituted by the first wall portion 84 and the second wall portion 86. As a result, when replacing the circular saw 20, it becomes easy to mount the lubrication box 52 on the circular saw cutting machine 10 in a state where it straddles the outer peripheral blade of the circular saw 20.

[0046] As described above, one embodiment of the present invention has been described in detail with reference to the drawings. However, the present invention is not limited to this embodiment and can be implemented in other modes.

[0047] For example, the first wall portion 84 and the second wall portion 86 of the lubrication box 52 may be openably connected via a hinge 78 provided between their outer peripheral side end portions, and the second wall portion 86 may be fixed to the rear cover 82.

[0048] Alternatively, the first wall portion 84 and the second wall portion 86 of the lubrication box 52 may be fixed to each other, and the second wall portion 86 may be provided on the rear cover 82 so as to be slidable in the radial direction of the circular saw 20.

[0049] In the above-described embodiment, the carbide saw blade has a cemented carbide tip 46 fixed to the outer peripheral portion of the base metal 44 by brazing. However, the present invention is not limited to this, and for example, a saw blade having a tip made of ceramic or the like fixed to the outer peripheral portion of the base metal 44, or a saw blade having a blade portion with a cutting edge integrally formed with the base metal 44 provided on the outer peripheral portion, and being reusable by polishing the blade portion each time its lifespan is reached may also be used. Further, the circular saw cutting machine 10 is of the swing type, but the present invention is not limited to this, and for example, it may be of the horizontal slide type, the vertical slide type, or the like. In the above-described embodiment, the material to be cut 14 is in the shape of a round bar, but the present invention is not limited to this, and it may have various cross-sectional shapes. Furthermore, in the above-described embodiment, the circular saw moving device 26 includes a ball screw mechanism having a ball screw shaft and a servo motor 72 for rotationally driving the ball screw shaft. However, the present invention is not limited to this, and for example, it may include a rack and pinion mechanism having a rack and pinion and a servo motor 72 for driving the rack and pinion, or the like.

[0050] Also, the material to be cut 14 may be made of various materials such as aluminum alloy, general steel, alloy steel, or stainless steel.

[0051] Note that the above description is merely one embodiment, and although not exemplified one by one, the present invention can be implemented in various modified and improved forms based on the knowledge of those skilled in the art without departing from the gist of the present invention.

Explanation of Reference Numerals

[0052] 10: Circular saw cutting machine 14: Material to be cut 20: Circular saw 22: Circular saw lubricating device 24: Circular saw rotational drive device 26: Circular saw moving device 44: Base metal 52: Lubricating box 54: Lubricating oil mist supply device 56: Lubricating oil mist generator 58: Introduction pipe 78: Hinge 80: Front cover (first saw cover) 82: Rear cover (second saw cover) 84: First wall portion 84a: First inner wall surface (inner wall surface) 86: Second wall portion 86a: Second inner wall surface (inner wall surface) 92: Inlet slot portion 94: Outlet slot portion 95: Brush 96: Lubricating seal material 98: Elastic lip 100: Inner peripheral elastic seal 102: Elastic lip 104: Outer peripheral elastic seal LS: Lubricating space MF: Lubricating oil C2: Rotation center

Claims

1. A circular saw cutting machine comprising: a disk-shaped circular saw having a plurality of peripheral blades arranged in a circumferential direction on the outer periphery of a base metal; a circular saw cover that covers a part of the circular saw; a circular saw lubrication device that lubricates the peripheral blades of the circular saw using a mist of lubricating oil; a circular saw rotation drive device that drives and rotates the circular saw; and a circular saw movement device that moves the circular saw toward a metal workpiece to cut the workpiece, The circular saw lubrication device includes a lubrication box that is provided within the circular saw cover and forms a lubrication space at a position where a peripheral blade of the circular saw passes, and a lubricant mist supplying device that supplies mist-like lubricant oil into the lubrication box to cause the mist-like lubricant oil to remain in the lubrication space within the lubrication box, The lubricant oil mist supply device includes a lubricant oil mist generator that generates the lubricant oil mist, and an introduction pipe that introduces the lubricant oil mist from the lubricant oil mist generator into the lubrication space in the lubrication box. A circular saw cutting machine characterized by:

2. The lubrication box includes an entrance slot portion through which the peripheral blade of the circular saw enters the lubrication space, and an exit slot portion through which the peripheral blade of the circular saw exits the lubrication space, and is disposed so as to straddle the peripheral blade of the circular saw.

2. The circular saw cutting machine according to claim 1.

3. The lubrication box is provided with a lubrication seal member, which is made of brushes raised so as to be close to each other and contactable with each other from inner wall surfaces of the lubrication box facing each other across the circular saw toward the circular saw, at least in the outlet slot portion of the lubrication box and the outlet slot portion.

3. The circular saw cutting machine according to claim 2.

4. The introduction pipe introduces the mist-like lubricating oil from the lubricating oil mist generator from the outlet slot portion toward the inlet slot portion.

3. The circular saw cutting machine according to claim 2.

5. The lubrication box is provided with inner peripheral elastic seals each having an elastic lip that is fixed to an end portion of the inner peripheral side of the circular saw on the inner wall surface of the lubrication box facing each other with the circular saw in between, and that is close to each other and has a protruding elastic lip that can contact the circular saw.

2. The circular saw cutting machine according to claim 1.

6. The lubrication box is provided with outer circumferential elastic seals having elastic lips which are fixed to the inner wall surfaces of the lubrication box facing each other with the circular saw therebetween and approach each other so as to be able to come into contact with each other.

2. The circular saw cutting machine according to claim 1.

7. A circular saw cutting machine comprising: a disc-shaped circular saw having a plurality of peripheral blades arranged circumferentially on the outer periphery of a base metal; a circular saw lubrication device which lubricates the peripheral blades of the circular saw with a mist of lubricating oil; a circular saw rotation drive device which drives and rotates the circular saw; and a circular saw moving device which moves the circular saw towards a metal workpiece to cut the workpiece, The circular saw lubrication device includes a lubrication box that forms a lubrication space at a position where a peripheral blade of the circular saw passes, and a lubricant mist supplying device that supplies mist-like lubricant oil into the lubrication box to cause the mist-like lubricant oil to remain in the lubrication space in the lubrication box, The circular saw is located between a pair of first and second saw covers that are openably and closably connected via a hinge that is located on the opposite side of the cutting position of the circular saw with respect to the center of rotation of the circular saw, and is covered by the first and second saw covers. The lubrication box is composed of a first wall portion and a second wall portion that are divided by a plane parallel to the circular saw, and the first wall portion and the second wall portion are fixed to the first and second saw covers, respectively. When the first and second saw covers are closed, the first and second wall portions form the lubrication box.

2. The circular saw cutting machine according to claim 1.

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