Machine tools

Abstract

To provide a machine tool capable of reliably recovering oil. [Solution] The machine tool includes a bed (21), a guide cover (61) attached to the bed (21) for guiding oil, and a coolant treatment device (130) disposed adjacent to the bed (21). The guide cover (61) has a movable part (76) that is movable between a first state (Cs) and a second state (Ct). The guide cover (61) is configured to guide oil toward the coolant treatment device (130) when the movable part (76) is in the first state (Cs), and to guide oil toward the bed (21) when the movable part (76) is in the second state (Ct).

Description

[Technical Field]

[0001] The present invention relates to a machine tool. [Background technology]

[0002] For example, Japanese Patent Application Laid-Open Publication No. 2017-144513 (Patent Document 1) discloses a machine tool including a bed, a work spindle that rotates the work on a central axis of rotation extending in the Z-axis direction, a tool rest that holds multiple tools and is movable in the Z-axis direction, the X-axis direction that is perpendicular to the Z-axis and oblique to the vertical direction, and the Y-axis direction that is perpendicular to the Z-axis and Y-axis, and a tailstock that is movable in the Z-axis direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-144513 Summary of the Invention [Problem to be solved by the invention]

[0004] In the machine tool disclosed in the aforementioned Patent Document 1, movable bodies such as a tool post and a tailstock are attached to a bed via a guide mechanism such as a linear guide or a sliding guide. In such a configuration, lubricating oil is supplied to the guide mechanism to ensure smooth movement of the movable bodies. However, if the lubricating oil supplied to the guide mechanism cannot be reliably recovered, the environment of a factory or the like where the machine tool is installed may be polluted.

[0005] An object of the present invention is to provide a machine tool that can reliably recover oil. [Means for solving the problem]

[0006] A machine tool according to one aspect of the present invention includes a bed, a guide cover attached to the bed for guiding oil, and a coolant treatment device disposed adjacent to the bed. The guide cover has a movable part that is movable between a first state and a second state. The guide cover is configured to guide oil toward the coolant treatment device when the movable part is in the first state, and to guide oil toward the bed when the movable part is in the second state.

[0007] A machine tool according to another aspect of the present invention includes a bed, a guide cover attached to the bed for guiding oil, and a coolant treatment device disposed adjacent to the bed. The guide cover has a movable part that is movable between a first state and a second state. The coolant treatment device is movable between a first position adjacent to the bed and a second position spaced apart from the bed. When the movable part is in the first state, the guide cover overlaps with the coolant treatment device as seen in the direction of movement of the coolant treatment device, and when the movable part is in the second state, the guide cover does not overlap with the coolant treatment device as seen in the direction of movement of the coolant treatment device. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a machine tool that can reliably recover oil. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a machine tool according to an embodiment of the present invention. [Figure 2] FIG. 2 is a front view showing the machine tool in FIG. [Figure 3] 3 is a side view showing the machine tool as seen in the direction indicated by arrow III in FIG. 2. [Figure 4] FIG. 2 is a perspective view showing the internal structure of the machine tool body in FIG. [Figure 5] 2 is a cross-sectional view showing the machine tool in FIG. 1 (when a movable part is in a first state). [Figure 6]6 is an enlarged cross-sectional view of the machine tool of the area surrounded by the two-dot chain line VI in FIG. 5. [Figure 7] 2 is a cross-sectional view showing the machine tool in FIG. 1 (when the movable part is in a second state). FIG. [Figure 8] 8 is a cross-sectional view showing the machine tool within the area surrounded by the two-dot chain line VIII in FIG. 7. [Figure 9] 10 is a perspective view showing the guide cover when the movable portion is in a first state. FIG. [Figure 10] 10 is a side view showing the guide cover as seen in the direction indicated by the arrow X in FIG. 9. [Figure 11] 10 is a cross-sectional view showing the guide cover as seen in the direction of the arrows on line XI-XI in FIG. 9. [Figure 12] 10 is a perspective view showing the guide cover when the movable portion is in a second state. FIG. [Figure 13] 13 is a side view showing the guide cover as seen in the direction indicated by the arrow XIII in FIG. 12. FIG. [Figure 14] 14 is a cross-sectional view showing the guide cover taken along line XIV-XIV in FIG. 12 as viewed in the direction of the arrows. [Figure 15] 13 is a cross-sectional view showing the guide cover as seen in the direction of the arrows on line XV-XV in FIG. 12. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings, in which the same or corresponding elements are designated by the same reference numerals.

[0011] Fig. 1 is a perspective view showing a machine tool according to an embodiment of the present invention, Fig. 2 is a front view showing the machine tool in Fig. 1, and Fig. 3 is a side view showing the machine tool as seen in the direction indicated by arrow III in Fig. 2.

[0012] 1 to 3, machine tool 200 in this embodiment is a lathe that machines a workpiece by bringing a tool into contact with the rotating workpiece. Machine tool 200 is an NC (Numerically Controlled) machine tool in which various operations for machining a workpiece are automated by numerical control using a computer.

[0013] Machine tool 200 has machine tool main body 210 and coolant treatment device 130. Machine tool main body 210 is the main body of machine tool 200 and performs workpiece machining. Coolant treatment device 130 is provided adjacent to machine tool main body 210. Coolant treatment device 130 treats the coolant discharged from machine tool main body 210 as workpiece machining occurs.

[0014] First, the structure of machine tool main body 210 will be described. Machine tool main body 210 has cover body 211 and door 213. Cover body 211 defines machining area 220 and forms the exterior of machine tool 200. Machining area 220 is a space where workpiece machining is performed, and is sealed by cover body 211 and door 213 to prevent foreign matter such as chips or coolant generated during workpiece machining from leaking out of machining area 220.

[0015] An opening 212 is provided in the cover body 211. The opening 212 opens the processing area 220 to the outside space. A door 213 is provided in the opening 212. The door 213 is attached to the cover body 211 so as to be slidable in the horizontal direction (a first direction 510 described below). The door 213 slides to open or close the opening 212.

[0016] Fig. 4 is a perspective view showing the internal structure of the machine tool main body in Fig. 1. Referring to Fig. 4, machine tool 200 (machine tool main body 210) has bed 21, first work spindle 41, tool rest (not shown), and second work spindle (not shown).

[0017] The bed 21 is a base member for supporting the first work spindle 41, tool rest, second work spindle, etc., and is installed on the floor of a factory or the like. The bed 21 is made of metal such as cast iron. The bed 21 is a slant bed type, and the support surface that supports the first work spindle 41, tool rest, second work spindle, etc. is inclined.

[0018] The first work spindle 41 is capable of holding a workpiece. The first work spindle 41 rotates the workpiece around a central rotation axis 101 that is parallel to the Z-axis that extends horizontally. The second work spindle (not shown) is capable of holding a workpiece. The second work spindle is disposed opposite the first work spindle 41 in the Z-axis direction. The second work spindle rotates the workpiece around a central rotation axis that is parallel to the Z-axis and extends in a straight line with the central rotation axis 101.

[0019] The first work spindle 41 is fixed to the bed 21. The second work spindle is attached to the bed 21. The second work spindle can be moved in the Z-axis direction by various feed mechanisms, guide mechanisms, servo motors, etc. Instead of the second work spindle, a tailstock for supporting the center of rotation of the work held by the first work spindle 41 may be attached to the bed 21.

[0020] The tool rest (not shown) is a turret-type tool rest that can hold multiple tools and moves the held tools in the circumferential direction of a rotation center axis parallel to the Z axis to index the tool to be used for machining.

[0021] The machine tool 200 (machine tool body 210) further includes a saddle 31, a cross slide 32, and a base 33.

[0022] The saddle 31 is attached to the bed 21. The saddle 31 is movable in the Z-axis direction by various feed mechanisms, guide mechanisms, servo motors, etc. The cross slide 32 is attached to the saddle 31. The cross slide 32 is movable in the X-axis direction, which is perpendicular to the Z-axis and inclined relative to the vertical and horizontal directions, by various feed mechanisms, guide mechanisms, servo motors, etc. The base 33 is attached to the cross slide 32. The base 33 is movable in the Y'-axis direction, which is perpendicular to the Z-axis and inclined relative to the X-axis, by various feed mechanisms, guide mechanisms, servo motors, etc. The base 33 is movable in the Y-axis direction, which is perpendicular to the X-axis and Z-axis, by interlocking the movement of the cross slide 32 in the X-axis direction with the movement of the base 33 in the Y'-axis direction.

[0023] The tool rest is fixed to the base 33. In this configuration, the tool rest is movable in the X-axis direction, the Y-axis direction, and the Z-axis direction.

[0024] Fig. 5 is a cross-sectional view showing the machine tool in Fig. 1 (when the movable part is in the first state) Fig. 5 shows a cross section of the machine tool body and the coolant treatment device as seen in the direction of the arrows on line VV in Fig. 4.

[0025] 4 and 5, machine tool 200 (machine tool body 210) further has a linear guide 50. Linear guide 50 constitutes a linear guide mechanism for guiding a second workpiece spindle (not shown) in the Z-axis direction.

[0026] The linear guide 50 has guide rails 51 (51A, 51B) and sliders 52 (52A, 52B). The guide rail 51 extends in the Z-axis direction. The guide rails 51A and 51B are spaced apart from each other in a direction perpendicular to the Z-axis direction (the X-axis direction). The slider 52 is fixed to the second work spindle. The slider 52 engages with the guide rail 51 via a plurality of rolling elements such as balls or rollers. The sliders 52A and 52B engage with the guide rails 51A and 51B, respectively. The slider 52 is slidable in the Z-axis direction along the guide rail 51. The slider 52 is equipped with a lubricating oil supply mechanism for supplying lubricating oil to the rolling elements.

[0027] The bed 21 has sliding portions 56 (56A, 56B). The sliding portions 56 constitute a sliding guide mechanism for guiding the saddle 31 in the Z-axis direction. The sliding portions 56 are formed from the casting that constitutes the bed 21. The sliding portions 56 extend in the Z-axis direction. The sliding portions 56A and 56B are spaced apart from each other in a direction perpendicular to the Z-axis direction (the X-axis direction). The saddle 31 is guided in the Z-axis direction while in surface contact with the sliding portions 56. The saddle 31 is provided with a lubricating oil supply mechanism for supplying lubricating oil to the sliding portions 56.

[0028] Sliding portion 56A is provided at a position offset diagonally downward along the X-axis direction from sliding portion 56B. Guide rail 51B is provided at a position offset diagonally downward along the X-axis direction from sliding portion 56A. Guide rail 51A is provided at a position offset diagonally downward along the X-axis direction from guide rail 51B.

[0029] The bed 21 further has a rail mounting portion 23. The rail mounting portion 23 is provided at the end (front end) of the bed 21 in the Z-axis direction. The rail mounting portion 23 extends in the X-axis direction. The guide rail 51A is attached to the rail mounting portion 23.

[0030] The bed 21 further has an oil receiving portion 22. The oil receiving portion 22 has a gutter shape that can receive oil. The oil receiving portion 22 extends in the Z-axis direction. The oil receiving portion 22 is provided below the rail mounting portion 23. The oil receiving portion 22 faces the coolant processing device 130 (chip conveyor 120) in a second direction 520, which will be described later. A notch 24 is provided at the end of the oil receiving portion 22 in the Z-axis direction. The notch 24 opens the oil flow path formed by the oil receiving portion 22.

[0031] Next, the structure of the coolant treatment device 130 will be described. In the figure, a first direction 510, a second direction 520, and a third direction 530 are indicated by arrows. The first direction 510 is parallel to the horizontal direction. The second direction 520 is parallel to the horizontal direction and perpendicular to the first direction 510. The third direction 530 is parallel to the up-down direction. The first direction 510 corresponds to the Z-axis direction. The first direction 510 corresponds to the left-right direction (width direction) of the machine tool 200, and the second direction 520 corresponds to the front-to-back direction (depth direction) of the machine tool 200.

[0032] 1 to 5, the coolant processing device 130 is disposed adjacent to the bed 21. The coolant processing device 130 has a chip conveyor 120 and a coolant tank 110.

[0033] The chip conveyor 120 discharges chips and coolant generated during workpiece machining in the machining area 220 to the outside of the machine tool main body 210. The coolant tank 110 stores the coolant.

[0034] The chip conveyor 120 has a cover part 121 and a transport device 126. The cover part 121 forms the exterior of the chip conveyor 120. The cover part 121 forms an internal space in which the transport device 126 is disposed. The cover part 121 is provided with a chip receiving opening 122, a chip discharge opening 123, and a coolant discharge opening (not shown).

[0035] The chip conveyor 120 is disposed adjacent to the bed 21 in the second direction 520. The chip conveyor 120 is positioned relative to the machine tool body 210 so that the chip receiving opening 122 opens facing upward directly below the machining area 220, and the chip discharge opening 123 opens facing downward at a position offset in the horizontal direction (first direction 510) from the machine tool body 210. A chip bucket (not shown) for collecting chips is disposed below the chip discharge opening 123.

[0036] Chip conveyor 120 has a plurality of wheels 127. The plurality of wheels 127 are provided so as to come into contact with the floor surface FL of a factory or the like where machine tool 200 is installed. The plurality of wheels 127 are provided at positions spaced apart from one another in the horizontal direction.

[0037] The coolant tank 110 is a box that forms a space for storing coolant. The coolant tank 110 is placed on a floor surface FL. A chip conveyor 120 is disposed between the machining area 220 and the coolant tank 110 in the third direction 530. The chip conveyor 120 is housed in the coolant tank 110 directly below the machining area 220.

[0038] The coolant tank 110 has a plurality of wheels 111. The plurality of wheels 111 are provided so as to come into contact with the floor surface FL. The plurality of wheels 111 are provided at positions spaced apart from one another in the horizontal direction.

[0039] Chips and coolant generated in the machining area 220 are received inside the cover part 121 through the chip receiving port 122. The chips are transported from the chip receiving port 122 toward the chip discharge port 123 by the transport device 126. The chips are discharged to the outside of the cover part 121 through the chip discharge port 123 and are collected in a chip bucket. Meanwhile, the coolant received inside the cover part 121 is discharged into the coolant tank 110 through a coolant discharge port (not shown) provided in the cover part 121.

[0040] Next, a mechanism for recovering lubricating oil used in the machine tool main body 210 will be described. Fig. 6 is an enlarged cross-sectional view of the machine tool in the area surrounded by the two-dot chain line VI in Fig. 5. Fig. 7 is a cross-sectional view showing the machine tool in Fig. 1 (when the movable part is in the second state). Fig. 7 shows a cross section corresponding to Fig. 5. Fig. 8 is a cross-sectional view showing the machine tool in the area surrounded by the two-dot chain line VIII in Fig. 7.

[0041] 5 to 8, machine tool 200 further has a guide cover 61. Guide cover 61 is attached to bed 21. Guide cover 61 is attached to rail attachment portion 23. Guide cover 61 is provided directly below guide rail 51A and slider 52A.

[0042] Guide cover 61 guides oil toward a predetermined position for the purpose of recovering oil used in machine tool main body 210. Guide cover 61 guides, for example, lubricating oil supplied to the rolling elements of slider 52 and lubricating oil supplied to sliding portion 56 toward a predetermined position.

[0043] The guide cover 61 has a movable part 76. The movable part 76 is movable between a first state Cs (the state of the movable part 76 shown in FIGS. 5 and 6) and a second state Ct (the state of the movable part 76 shown in FIGS. 7 and 8). The guide cover 61 is configured to guide oil (lubricant) toward the coolant treatment device 130 when the movable part 76 is in the first state Cs, and to guide oil (lubricant) toward the bed 21 when the movable part 76 is in the second state Ct.

[0044] As shown in FIG. 7, the coolant treatment device 130 is movable between a first position Pa adjacent to the bed 21 and a second position Pb away from the bed 21. The direction of movement of the coolant treatment device 130 between the first position Pa and the second position Pb is, for example, a second direction 520. When the coolant treatment device 130 is disposed at the first position Pa, the movable part 76 is in a first state Cs. When the coolant treatment device 130 is disposed at the second position Pb, the movable part 76 is in a second state Ct. When the coolant treatment device 130 moves between the first position Pa and the second position Pb, the movable part 76 is in the second state Ct.

[0045] More specifically, when the machine tool 200 is in operation, the coolant treatment device 130 is disposed at a first position Pa adjacent to the bed 21 (a state in which the coolant treatment device 130 is attached to the machine tool main body 210). At this time, the movable part 76 is in a first state Cs.

[0046] When cleaning the coolant tank 110 or performing maintenance on the chip conveyor 120, or when separating the machine tool body 210 and the coolant treatment device 130 before shipping the machine tool 200 from an assembly factory, an operator slides the door 213 in FIGS. 1 and 2 to open the opening 212. The operator accesses the guide cover 61 through the opening 212 and moves the movable part 76 from the first position Cs to the second position Ct. The operator pulls the coolant treatment device 130 out of the machine tool body 210 in the second direction 520 to move it to a second position Pb away from the bed 21.

[0047] Fig. 9 is a perspective view showing the guide cover when the movable part is in the first state. Fig. 10 is a side view showing the guide cover as seen in the direction indicated by arrow X in Fig. 9. Fig. 11 is a cross-sectional view showing the guide cover as seen in the direction of the arrows on line XI-XI in Fig. 9.

[0048] 5 and 6, and 9 to 11, guide cover 61 further has a base 71. Base 71 is attached to bed 21. Base 71 extends obliquely downward from bed 21. Base 71 extends in the Z-axis direction (first direction 510) in parallel with guide rail 51 and sliding portion 56.

[0049] The rail mounting portion 23 has a top surface 23a and a front surface 23b (see FIG. 6). The top surface 23a is a plane perpendicular to the Y-axis direction. The front surface 23b is a plane perpendicular to the second direction 520. The front surface 23b is disposed directly below the guide rail 51A and the slider 52A.

[0050] 9 to 11, the base 71 has a first portion 71m and a second portion 71n. The first portion 71m has a plate shape in which the second direction 520 corresponds to the thickness direction. The first portion 71m overlaps the front surface 23b in the second direction 520 and is fastened to the rail mounting portion 23 using bolts or the like. The second portion 71n extends obliquely downward from the lower end of the first portion 71m in the second direction 520 so as to be away from the front surface 23b of the rail mounting portion 23.

[0051] The movable part 76 extends in the Z-axis direction (first direction 510) in parallel with the guide rail 51 and the sliding part 56. The movable part 76 is rotatably connected to the lower end 71u of the base part 71. The movable part 76 is rotatable around a rotation center shaft 106. The rotation center shaft 106 extends in the first direction 510. The movable part 76 is connected to the lower end 71u of the base part 71 via a plurality of hinges 72. The plurality of hinges 72 are provided at intervals from one another in the first direction 510. The rotation center shaft 106 of the movable part 76 is constituted by the hinges 72.

[0052] The movable part 76 is in the first state Cs. The movable part 76 extends diagonally downward from the lower end 71u of the base 71. The movable part 76 extends from the lower end 71u of the base 71 toward the coolant processing device 130. The movable part 76 extends from the lower end 71u of the base 71 toward the chip conveyor 120.

[0053] The movable portion 76 has a third portion 76p and a fourth portion 76q. The third portion 76p faces the lower end portion 71u of the base portion 71 with a gap 73 therebetween. The third portion 76p extends obliquely downward from the gap 73. The third portion 76p extends from the gap 73 parallel to the second portion 71n of the base portion 71. The fourth portion 76q is connected to the third portion 76p by welding or the like. The fourth portion 76q extends from the third portion 76p toward the second portion 71n across the opening of the gap 73. The fourth portion 76q is located on the back side of the hinge 72, with the third portion 76p and the second portion 71n sandwiched between them. The gap 73 is closed by the fourth portion 76q.

[0054] The movable portion 76 further has a bent portion 76v. The bent portion 76v is bent from the lower end of the third portion 76p. The bent portion 76v intersects with the third portion 76p at a 90° angle. The bent portion 76v extends obliquely downward from the lower end of the third portion 76p in the second direction 520 so as to approach the front surface 23b of the rail mounting portion 23.

[0055] 5 and 6, the cover portion 121 of the chip conveyor 120 has an edge portion 121j and a rising portion 121k. The edge portion 121j has a plate shape in which the third direction 530 corresponds to the thickness direction. The edge portion 121j has a frame shape when viewed in the third direction 530, and the transport device 126 is provided inside the edge portion 121j. The rising portion 121k rises upward from the outer periphery of the edge portion 121j.

[0056] The third portion 76p extends obliquely downward from the gap 73 toward the edge 121j. The third portion 76p straddles the rising portion 121k in the second direction 520 and enters the space above the edge 121j. The bent portion 76v abuts the edge 121j. The movable portion 76 (bent portion 76v) faces the rising portion 121k with a gap therebetween in the second direction 520, which is the direction of movement of the coolant treatment device 130 between the first position Pa and the second position Pb. The lower end of the movable portion 76 is located lower than the upper end of the rising portion 121k. The guide cover 61 overlaps with the coolant treatment device 130 when viewed in the direction of movement of the coolant treatment device 130 between the first position Pa and the second position Pb. The guide cover 61 (movable portion 76) overlaps with the chip conveyor 120 (cover portion 121) when viewed in the second direction 520. The guide cover 61 overlaps with the coolant processing device 130 when viewed from above. The guide cover 61 (movable portion 76) overlaps with the chip conveyor 120 (cover portion 121) when viewed from above.

[0057] In this configuration, the movable part 76 is positioned so that, when in the first state Cs, it interferes with the coolant treatment device 130, which moves between the first position Pa and the second position Pb. When the coolant treatment device 130 moves between the first position Pa and the second position Pb, the bent part 76v of the movable part 76 interferes with the rising part 121k of the chip conveyor 120 in the coolant treatment device 130.

[0058] Oil used in the machine tool body 210 is guided to the coolant treatment device 130 by the guide cover 61 with the movable part 76 in the first state Cs. More specifically, the lubricating oil flows along the surface of the bed 21 and flows toward the guide cover 61 by gravity. The lubricating oil is guided diagonally downward by the base 71 and the movable part 76 in the guide cover 61, and flows toward the chip conveyor 120. The lubricating oil drips from the bent part 76v of the movable part 76 to the edge part 121j and then enters the inside of the cover part 121. The lubricating oil, together with the coolant received inside the cover part 121, is collected in the coolant tank 110. Note that oil used in the machine tool body 210 may also be guided directly to the coolant tank 110 by the guide cover 61 with the movable part 76 in the first state Cs.

[0059] Fig. 12 is a perspective view showing the guide cover when the movable part is in the second state. Fig. 13 is a side view showing the guide cover as viewed in the direction indicated by arrow XIII in Fig. 12. Fig. 14 is a cross-sectional view showing the guide cover as viewed in the direction of the arrows on line XIV-XIV in Fig. 12. Fig. 15 is a cross-sectional view showing the guide cover as viewed in the direction of the arrows on line XV-XV in Fig. 12.

[0060] 7 and 8, and 12 to 15, the movable portion 76 is in the second state Ct. The guide cover 61 may be provided with a locking mechanism for holding the movable portion 76 in the second state Ct.

[0061] The movable portion 76 forms a gap 73 with the lower end portion 71u of the base portion 71 and extends obliquely upward from the gap 73. The movable portion 76 extends from the gap 73 in a third direction 530 in a direction away from the coolant treatment device 130 (chip conveyor 120).

[0062] The third portion 76p extends obliquely upward from the gap 73. The third portion 76p faces the base 71 in the second direction 520. The third portion 76p, together with the second portion 71n of the base 71, forms a V-shape with the rotation center axis 106 as a corner. The fourth portion 76q is spaced apart from the second portion 71n of the base 71. The space between the fourth portion 76q and the second portion 71n opens the gap 73. The movable portion 76 is positioned above the rising portion 121k. The guide cover 61 is positioned above the upper end of the rising portion 121k. The guide cover 61 does not overlap with the coolant treatment device 130 when viewed in the direction of movement of the coolant treatment device 130 between the first position Pa and the second position Pb. The guide cover 61 (movable portion 76) does not overlap the chip conveyor 120 (cover portion 121) when viewed in the second direction 520.

[0063] In this configuration, the movable part 76 is positioned so as not to interfere with the coolant processing device 130 moving between the first position Pa and the second position Pb when in the second state Ct. When the coolant processing device 130 moves between the first position Pa and the second position Pb, the bent part 76v of the movable part 76 does not interfere with the rising part 121k of the chip conveyor 120 in the coolant processing device 130.

[0064] The guide cover 61 further has a gutter portion 81. The gutter portion 81 extends in the Z-axis direction (first direction 510) in parallel with the guide rail 51 and the sliding portion 56. The gutter portion 81 extends in the first direction 510 while forming a V-shaped cross section. The gutter portion 81 forms a flow path through which lubricating oil can flow. The gutter portion 81 is connected to the base 71. The gutter portion 81 is connected to the second portion 71n. The gutter portion 81 is disposed directly below the lower end portion 71u of the base 71. In the second state Ct, the movable portion 76 has a gap 73 directly above the gutter portion 81 and the lower end portion 71u of the base 71.

[0065] The guide cover 61 further has a guide portion 91. The guide portion 91 extends from the gutter portion 81 toward the bed 21. The guide portion 91 extends from the gutter portion 81 toward the oil receiving portion 22. The guide portion 91 extends obliquely downward from the gutter portion 81. The guide portion 91 extends obliquely downward from the gutter portion 81 so as to approach the bed 21 in the second direction 520. The guide portion 91 is connected to one end of the gutter portion 81 in the first direction 510.

[0066] 14, an opening 82 is provided in the gutter portion 81. The opening 82 communicates with the oil flow path formed by the gutter portion 81 and opens directly above the guide portion 91. The guide portion 91 forms a flow path through which lubricating oil can flow. The oil flow path formed by the guide portion 91 opens directly above the oil receiving portion 22.

[0067] Oil used in machine tool main body 210 is guided to bed 21 by guide cover 61, with movable part 76 in second state Ct. More specifically, even after operation of machine tool 200 is stopped, lubricating oil remaining in linear guide 50 or sliding part 56 flows along the surface of bed 21 and moves toward guide cover 61 by gravity. In guide cover 61, the lubricating oil is guided obliquely downward by base 71 and further passes through gap 73 to enter gutter 81. In gutter 81, the lubricating oil flows in first direction 510, passes through opening 82, and falls into guide 91. Guided by guide 91, the lubricating oil moves obliquely downward and is received by oil receiver 22. The lubricating oil received in oil receiver 22 passes through cutout 24 and is collected in an oil collection box installed directly below cutout 24.

[0068] To summarize the configuration of the machine tool 200 according to the embodiment of the present invention described above, the machine tool 200 according to the present embodiment includes a bed 21, a guide cover 61 attached to the bed 21 for guiding oil, and a coolant treatment device 130 disposed adjacent to the bed 21. The guide cover 61 has a movable part 76 that is movable between a first state Cs and a second state Ct. The guide cover 61 is configured to guide oil toward the coolant treatment device 130 when the movable part 76 is in the first state Cs, and to guide oil toward the bed 21 when the movable part 76 is in the second state Ct.

[0069] According to this configuration, when the coolant treatment device 130 is placed adjacent to the bed 21, the guide cover 61 with the movable part 76 in the first state Cs guides the oil toward the coolant treatment device 130, and when the coolant treatment device 130 is not placed adjacent to the bed 21, the guide cover 61 with the movable part 76 in the second state Ct guides the oil toward the bed 21. This allows oil to be reliably collected regardless of whether the coolant treatment device 130 is present or not.

[0070] In particular, the coolant treatment device 130 is pulled out from the machine tool main body 210 when cleaning the coolant tank 110 or performing maintenance on the chip conveyor 120, or when separating the machine tool main body 210 and the coolant treatment device 130 when shipping the machine tool 200 from an assembly factory. Even in such cases, by moving the movable part 76 from the first state Cs to the second state Ct in advance, the guide cover 61 can recover lubricating oil used in the various guide mechanisms in the machine tool main body 210 into the bed 21. This prevents the environment of the factory or the like in which the machine tool 200 is installed from being polluted.

[0071] The coolant treatment device 130 is movable between a first position Pa adjacent to the bed 21 and a second position Pb away from the bed 21. The movable part 76 is positioned so that when the movable part 76 is in the first state Cs, it interferes with the coolant treatment device 130 moving between the first position Pa and the second position Pb, and when the movable part 76 is in the second state Ct, it does not interfere with the coolant treatment device 130 moving between the first position Pa and the second position Pb.

[0072] With this configuration, the operator can be given an opportunity to move the movable part 76 from the first state Cs to the second state Ct before moving the coolant treatment device 130 from the first position Pa to the second position Pb.

[0073] The guide cover 61 is attached to the bed 21 and includes a base 71 extending obliquely downward from the bed 21, a movable part 76 rotatably connected to a lower end 71u of the base 71, a gutter 81 connected to the base 71 and positioned directly below the lower end 71u of the base 71, and a guide part 91 extending from the gutter 81 toward the bed 21. When the movable part 76 is in the first state Cs, it extends obliquely downward from the lower end 71u of the base 71 toward the coolant treatment device 130, and when the movable part 76 is in the second state Ct, it extends obliquely upward from the gap 73 while leaving a gap 73 between it and the lower end 71u of the base 71.

[0074] According to this configuration, when the movable part 76 is in the first state Cs, the oil can be guided by the base part 71 and the movable part 76 toward the coolant treatment device 130. Furthermore, when the movable part 76 is in the second state Ct, the oil can be moved from the base part 71 through the gap 73 to the gutter part 81, and further, the oil from the gutter part 81 can be guided toward the bed 21 by the guide part 91.

[0075] Machine tool 200 also includes a movable body (second workpiece spindle and tool rest) that moves in the Z-axis direction, which is a predetermined direction, relative to bed 21, and a guide mechanism (linear guide 50 and sliding portion 56) that is supplied with lubricant and that guides the movable body in the Z-axis direction. Base portion 71, movable portion 76, and gutter portion 81 extend in the Z-axis direction in parallel with the guide mechanism.

[0076] With this configuration, the lubricating oil used in the guide mechanism (linear guide 50 and sliding portion 56) can be more reliably collected regardless of the position in the Z-axis direction.

[0077] The machine tool 200 includes a bed 21, a guide cover 61 attached to the bed 21 for guiding oil, and a coolant treatment device 130 disposed adjacent to the bed 21. The guide cover 61 has a movable part 76 that is movable between a first state Cs and a second state Ct. The coolant treatment device 130 is movable between a first position Pa adjacent to the bed 21 and a second position Pb spaced apart from the bed 21. When the movable part 76 is in the first state Cs, the guide cover 61 overlaps with the coolant treatment device 130 as viewed in the movement direction of the coolant treatment device 130 (second direction 520), and when the movable part 76 is in the second state Ct, the guide cover 61 does not overlap with the coolant treatment device 130 as viewed in the movement direction of the coolant treatment device 130 (second direction 520).

[0078] According to this configuration, when the coolant treatment device 130 is positioned at the first position Pa adjacent to the bed 21, the guide cover 61 guides oil toward the coolant treatment device 130, so the movable part 76 is set to the first state Cs in which the guide cover 61 overlaps the coolant treatment device 130 as seen in the direction of movement of the coolant treatment device 130. Furthermore, when the coolant treatment device 130 is moved between the first position Pa and the second position Pb, the movable part 76 is set to the second state Ct in which the guide cover 61 does not overlap the coolant treatment device 130 as seen in the direction of movement of the coolant treatment device 130 in order to avoid interference between the coolant treatment device 130 and the guide cover 61. As a result, in a machine tool 200 including a coolant treatment device 130 that can move between the first position Pa adjacent to the bed 21 and the second position Pb away from the bed 21, the guide cover 61 can reliably collect oil in the coolant treatment device 130 positioned at the first position Pa.

[0079] It should be noted that the movement of the movable part between the first state and the second state in the present invention is not limited to a rotational movement, and may be, for example, a sliding movement.

[0080] Furthermore, the machine tool in the present invention is not limited to a lathe, but may be, for example, a machining center that processes a workpiece by bringing a rotating tool into contact with the workpiece, a multi-tasking machine that has both turning and milling functions, or an AM / SM hybrid machine that is capable of additive manufacturing (AM) processing of a workpiece and subtractive manufacturing (SM) processing of a workpiece.

[0081] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0082] 21 bed, 22 oil receiving portion, 24 notch portion, 23 rail mounting portion, 23a top surface, 23b front surface, 31 saddle, 32 cross slide, 33 base, 41 first work spindle, 50 linear guide, 51, 51A, 51B guide rail, 52, 52A, 52B slider, 56, 56A, 56B sliding portion, 61 guide cover, 71 base, 71m first portion, 71n second portion, 71u lower end portion, 72 hinge, 73 gap, 76 moving portion, 76p third portion, 76q fourth portion, 76v bending portion, 81 trough portion, 82, 212 opening, 91 guide portion, 101 rotation center axis, 106 rotation center axis, 110 coolant tank, 111, 127 Wheel, 120 chip conveyor, 121 cover portion, 121j edge portion, 121k rising portion, 122 chip receiving port, 123 chip discharge port, 126 conveying device, 130 coolant processing device, 200 machine tool, 210 machine tool main body, 211 cover body, 213 door, 220 machining area, 510 first direction, 520 second direction, 530 third direction, Cs first state, Ct second state, FL floor surface, Pa first position, Pb second position.

Claims

1. The bed and a guide cover attached to the bed for guiding oil; a coolant processing device disposed adjacent to the bed and having a chip conveyor and a coolant tank; the guide cover has a movable portion that is movable between a first state and a second state; The guide cover is configured to guide oil toward the coolant treatment device when the movable part is in the first state, and to guide oil toward the bed when the movable part is in the second state.

2. The bed and a guide cover attached to the bed for guiding oil; a coolant treatment device disposed adjacent to the bed and movable relative to the bed; the guide cover has a movable portion that is movable between a first state and a second state; The guide cover overlaps with the coolant processing device when viewed in the direction of movement of the coolant processing device when the movable part is in the first state, and does not overlap with the coolant processing device when viewed in the direction of movement of the coolant processing device when the movable part is in the second state.

3. the coolant treatment device is movable between a first position adjacent to the bed and a second position away from the bed; 2. The machine tool according to claim 1, wherein the movable part is positioned so that when in the first state, it interferes with the coolant treatment device moving between the first position and the second position, and when in the second state, it does not interfere with the coolant treatment device moving between the first position and the second position.

4. The guide cover is a base attached to the bed and extending obliquely downward from the bed; the movable portion rotatably connected to a lower end of the base portion; a gutter portion connected to the base portion and disposed directly below a lower end portion of the base portion; a guide portion extending from the trough portion toward the bed, 2. The machine tool of claim 1, wherein when the movable part is in the first state, it extends diagonally downward from the lower end of the base toward the coolant treatment device, and when the movable part is in the second state, it extends diagonally upward from the gap while leaving a gap with the lower end of the base.

5. a moving body that moves in a predetermined direction relative to the bed; a guide mechanism to which lubricating oil is supplied and which guides the moving body in the predetermined direction, The machine tool according to claim 4 , wherein the base portion, the movable portion, and the gutter portion extend in the predetermined direction in parallel with the guide mechanism.

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