Working machinery

Abstract

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

[0005]

[0001] This invention relates to a machine tool.

Background Art

[0002] For example, Japanese Patent Application Laid-Open No. 2017-144513 (Patent Document 1) discloses a machine tool including a bed, a workpiece spindle that rotates a workpiece about a rotation center axis extending in the Z-axis direction, a tool rest that holds a plurality of tools and is movable in the Z-axis direction, an X-axis direction that is orthogonal to the Z-axis and inclined with respect to the vertical direction, and a Y-axis direction that is orthogonal to the Z-axis and the Y-axis. A tailstock movable in the Z-axis direction is also disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the machine tool disclosed in Patent Document 1 described above, moving bodies such as a tool rest and a tailstock are attached to a bed via a guiding mechanism such as a linear guide or a sliding guide. In such a configuration, lubricating oil is supplied to the guiding mechanism in order to achieve smooth movement of the moving bodies. However, if the lubricating oil supplied to the guiding mechanism cannot be reliably recovered, the environment of a factory or the like where the machine tool is installed may be contaminated.

[0005] An object of this invention is to provide a machine tool capable of reliably recovering oil.

Means for Solving the Problems

[0006] A machine tool according to one aspect of this invention comprises a bed, a guide cover attached to the bed for guiding oil, and a coolant processing device positioned adjacent to the bed. The guide cover has a movable part that can move between a first state and a second state. The guide cover is configured to guide oil toward the coolant processing 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 this invention comprises a bed, a guide cover attached to the bed for guiding oil, and a coolant processing device positioned adjacent to the bed. The guide cover has a movable part that can move between a first state and a second state. The coolant processing device is movable between a first position adjacent to the bed and a second position away from the bed. When the movable part is in the first state, the guide cover overlaps with the coolant processing device when viewed in the direction of movement of the coolant processing device, and when the movable part is in the second state, the guide cover does not overlap with the coolant processing device when viewed in the direction of movement of the coolant processing device. [Effects of the Invention]

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

[0009] [Figure 1] This is a perspective view showing a machine tool according to an embodiment of the present invention. [Figure 2] This is a front view showing the machine tool in Figure 1. [Figure 3] Figure 2 is a side view showing a machine tool as seen in the direction indicated by arrow III. [Figure 4] Figure 1 is a perspective view showing the internal structure of the machine tool body. [Figure 5] This is a cross-sectional view showing a machine tool in Figure 1 (when the movable part is in the first state). [Figure 6]This is a cross-sectional view showing a magnified view of the machine tool within the area enclosed by the dashed line VI in Figure 5. [Figure 7] This is a cross-sectional view showing the machine tool in Figure 1 (when the movable part is in the second state). [Figure 8] This is a cross-sectional view showing the machine tool within the area enclosed by the dashed line VIII in Figure 7. [Figure 9] This is a perspective view showing the guide cover when the movable part is in the first state. [Figure 10] Figure 9 is a side view showing the guide cover as seen in the direction indicated by arrow X. [Figure 11] This is a cross-sectional view showing the guide cover as seen in the direction of the arrow along the line XI-XI in Figure 9. [Figure 12] This is a perspective view showing the guide cover when the movable part is in the second state. [Figure 13] This is a side view of the guide cover as seen in the direction indicated by arrow XIII in Figure 12. [Figure 14] This is a cross-sectional view showing the guide cover as seen in the direction of the arrow along the line XIV-XIV in Figure 12. [Figure 15] This is a cross-sectional view showing the guide cover as seen in the direction of the arrow along the line XV-XV in Figure 12. [Modes for carrying out the invention]

[0010] Embodiments of this invention will be described with reference to the drawings. In the drawings referred to below, the same or equivalent components are given the same numbers.

[0011] Figure 1 is a perspective view showing a machine tool in an embodiment of this invention. Figure 2 is a front view showing the machine tool in Figure 1. Figure 3 is a side view showing the machine tool as seen in the direction indicated by arrow III in Figure 2.

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

[0013] The machine tool 200 has a machine tool main body 210 and a coolant treatment device 130. The machine tool main body 210 is the main body portion of the machine tool 200 and performs machining of the workpiece. The coolant treatment device 130 is installed beside the machine tool main body 210. The coolant treatment device 130 treats the coolant discharged from the machine tool main body 210 during workpiece machining.

[0014] First, the structure of the machine tool main body 210 will be described. The machine tool main body 210 has a cover body 211 and a door 213. The cover body 211 partitions and forms a machining area 220 and forms the appearance of the machine tool 200. The machining area 220 is a space where workpiece machining is performed, and is sealed by the cover body 211 and the door 213 so that foreign matters such as chips or coolant accompanying workpiece machining do not leak outside the machining area 220.

[0015] An opening 212 is provided in the cover body 211. The opening 212 opens the machining area 220 to the external space. The door 213 is provided at the opening 212. The door 213 is attached to the cover body 211 so as to be slidable in the horizontal direction (the first direction 510 described later). By the sliding operation of the door 213, the opening 212 is brought into an open state or a closed state.

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

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

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

[0019] The first workpiece spindle 41 is fixed to the bed 21. The second workpiece spindle is mounted on the bed 21. The second workpiece spindle is movable in the Z-axis direction by various feed mechanisms, guide mechanisms, and servo motors. Instead of the second workpiece spindle, a tailstock may be mounted on the bed 21 to support the rotation center of the workpiece held by the first workpiece spindle 41.

[0020] The tool post (not shown) is capable of holding multiple tools. The tool post is a turret-type tool post that moves the multiple tools it holds in the circumferential direction of a pivot 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 comprises a saddle 31, a cross feed table 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, and servo motors. The cross feed table 32 is attached to the saddle 31. The cross feed table 32 is movable in the X-axis direction, which is perpendicular to the Z-axis and inclined with respect to the vertical and horizontal directions, by various feed mechanisms, guide mechanisms, and servo motors. The base 33 is attached to the cross feed table 32. The base 33 is movable in the Y'-axis direction, which is perpendicular to the Z-axis and inclined with respect to the X-axis, by various feed mechanisms, guide mechanisms, and servo motors. The base 33 is movable in the Y-axis direction, which is perpendicular to the X-axis and Z-axis, by the interlocking movement of the cross feed table 32 in the X-axis direction and the movement of the base 33 in the Y'-axis direction.

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

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

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

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

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

[0028] The sliding part 56A is positioned at a location offset diagonally downward along the X-axis from the sliding part 56B. The guide rail 51B is positioned at a location offset diagonally downward along the X-axis from the sliding part 56A. The guide rail 51A is positioned at a location offset diagonally downward along the X-axis from the 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 section 22. The oil receiving section 22 has a trough shape capable of receiving oil. The oil receiving section 22 extends in the Z-axis direction. The oil receiving section 22 is located below the rail mounting section 23. In the second direction 520, which will be described later, the oil receiving section 22 faces the coolant processing device 130 (chip conveyor 120). A notch 24 is provided at the end of the oil receiving section 22 in the Z-axis direction. The notch 24 opens the oil flow path formed by the oil receiving section 22.

[0031] Next, the structure of the coolant processing device 130 will be explained. In the figure, the first direction 510, the second direction 520, and the 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 vertical 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-back direction (depth direction) of the machine tool 200.

[0032] Referring to Figures 1 to 5, the coolant processing apparatus 130 is positioned adjacent to the bed 21. The coolant processing apparatus 130 includes a chip conveyor 120 and a coolant tank 110.

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

[0034] The chip conveyor 120 has a cover portion 121 and a conveying device 126. The cover portion 121 forms the external appearance of the chip conveyor 120. The cover portion 121 forms the internal space in which the conveying device 126 is arranged. The cover portion 121 is provided with a chip receiving port 122, a chip discharge port 123, and a coolant discharge port (not shown).

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

[0036] The chip conveyor 120 has a plurality of wheels 127. The plurality of wheels 127 are positioned to be in contact with the floor surface FL of a factory or the like where the machine tool 200 is installed. The plurality of wheels 127 are positioned apart from each other in the horizontal direction.

[0037] The coolant tank 110 consists of a box-shaped structure that forms a space for storing coolant. The coolant tank 110 is placed on the floor surface FL. A chip conveyor 120 is positioned 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 positioned to be in contact with the floor surface FL. The plurality of wheels 111 are positioned apart from each other in the horizontal direction.

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

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

[0041] Referring to Figures 5 to 8, the machine tool 200 further has a guide cover 61. The guide cover 61 is attached to the bed 21. The guide cover 61 is attached to the rail mounting section 23. The guide cover 61 is located directly below the guide rail 51A and the slider 52A.

[0042] The guide cover 61 guides the oil used in the machine tool body 210 toward a predetermined position in order to recover the oil. For example, the guide cover 61 guides the lubricating oil supplied to the rolling elements of the slider 52 and the lubricating oil supplied to the sliding part 56 toward a predetermined position.

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

[0044] As shown in Figure 7, the coolant processing 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 processing device 130 between the first position Pa and the second position Pb is, for example, the second direction 520. When the coolant processing device 130 is positioned at the first position Pa, the movable part 76 is in a first state Cs. When the coolant processing device 130 is positioned at the second position Pb, the movable part 76 is in a second state Ct. When the coolant processing 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 positioned at a first position Pa adjacent to the bed 21 (the coolant treatment device 130 is attached to the machine tool body 210). At this time, the movable part 76 is in a first state Cs.

[0046] When cleaning the coolant tank 110, performing maintenance on the chip conveyor 120, or separating the machine tool body 210 and the coolant processing unit 130 when shipping the machine tool 200 from the assembly plant, the worker slides the door 213 in Figures 1 and 2 to open the opening 212. The worker accesses the guide cover 61 through the opening 212 and moves the movable part 76 from the first state Cs to the second state Ct. The worker pulls the coolant processing unit 130 out of the machine tool body 210 in the second direction 520, thereby moving it to the second position Pb away from the bed 21.

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

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

[0049] The rail mounting portion 23 has a top surface 23a and a front surface 23b (see Figure 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 positioned directly below the guide rail 51A and the slider 52A.

[0050] As shown in Figures 9 to 11, the base portion 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 is superimposed on the front surface 23b in the second direction 520 and fastened to the rail mounting portion 23 using bolts or the like. The second portion 71n extends diagonally downward from the lower end of the first portion 71m so as to move away from the front surface 23b of the rail mounting portion 23 in the second direction 520.

[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 71. The movable part 76 is rotatable about a pivot axis 106. The pivot axis 106 extends in the first direction 510. The movable part 76 is connected to the lower end 71u of the base 71 via a plurality of hinges 72. The plurality of hinges 72 are spaced apart from each other in the first direction 510. The pivot axis 106 of the movable part 76 is formed 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 part 76 has a third part 76p and a fourth part 76q. The third part 76p faces the lower end portion 71u of the base 71 with a gap 73 between them. The third part 76p extends diagonally downward from the gap 73. The third part 76p extends parallel to the second part 71n of the base 71 from the gap 73. The fourth part 76q is connected to the third part 76p by welding or the like. The fourth part 76q extends from the third part 76p across the opening of the gap 73 toward the second part 71n. The fourth part 76q is provided on the back side of the hinge 72, sandwiching the third part 76p and the second part 71n. The gap 73 is closed by the fourth part 76q.

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

[0055] As shown in Figures 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 a conveying device 126 is provided inside the edge portion 121j. The rising portion 121k rises upward from the outer peripheral edge of the edge portion 121j.

[0056] The third portion 76p extends diagonally downward from the gap 73 toward the edge 121j. In the second direction 520, the third portion 76p straddles the rising portion 121k and enters the space above the edge 121j. The bent portion 76v is in contact with the edge 121j. The movable portion 76 (bent portion 76v) is positioned opposite the rising portion 121k at a distance in the second direction 520, which is the direction of movement of the coolant processing device 130 between the first position Pa and the second position Pb. The lower end of the movable portion 76 is positioned below the upper end of the rising portion 121k. The guide cover 61 overlaps with the coolant processing device 130 when viewed in the direction of movement of the coolant processing device 130 between the first position Pa and the second position Pb. The guide cover 61 (movable part 76) overlaps with the chip conveyor 120 (cover part 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 part 76) overlaps with the chip conveyor 120 (cover part 121) when viewed from above.

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

[0058] The oil used in the machine tool body 210 is guided to the coolant processing device 130 by a guide cover 61 in which the movable part 76 is in a first state Cs. More specifically, the lubricating oil flows along the surface of the bed 21 and is directed towards 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 is directed towards the chip conveyor 120. The lubricating oil drips from the bent part 76v of the movable part 76 to the edge 121j and then enters the interior 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. Alternatively, the oil used in the machine tool body 210 may be directly guided to the coolant tank 110 by the guide cover 61 in which the movable part 76 is in a first state Cs.

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

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

[0061] The movable part 76 extends diagonally upward from the gap 73 between it and the lower end portion 71u of the base portion 71. The movable part 76 extends from the gap 73 in a third direction 530 away from the coolant processing device 130 (chip conveyor 120).

[0062] The third portion 76p extends diagonally upward from the gap 73. In the second direction 520, the third portion 76p faces the base 71. Together with the second portion 71n of the base 71, the third portion 76p forms a V-shape with the pivot axis 106 as the 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 up 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 processing device 130 when viewed in the direction of movement of the coolant processing device 130 between the first position Pa and the second position Pb. The guide cover 61 (movable part 76) does not overlap with the chip conveyor 120 (cover part 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 when it is in the second state Ct, as it moves between the first position Pa and the second position Pb. When the coolant processing device 130 moves between the first position Pa and the second position Pb, the bent portion 76v of the movable part 76 does not interfere with the rising portion 121k of the chip conveyor 120 in the coolant processing device 130.

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

[0065] The guide cover 61 further has a guide section 91. The guide section 91 extends from the trough 81 toward the bed 21. The guide section 91 extends from the trough 81 toward the oil receiving section 22. The guide section 91 extends diagonally downward from the trough 81. The guide section 91 extends diagonally downward from the trough 81 toward the bed 21 in the second direction 520. The guide section 91 is connected to one end of the trough 81 in the first direction 510.

[0066] As shown in Figure 14, the trough 81 is provided with an opening 82. The opening 82 communicates with the oil flow path formed by the trough 81 and is located directly above the guide section 91. The guide section 91 forms a flow path through which lubricating oil can flow. The oil flow path formed by the guide section 91 is open directly above the oil receiving section 22.

[0067] The oil used in the machine tool body 210 is guided to the bed 21 by the guide cover 61, in which the movable part 76 is in a second state Ct. More specifically, even after the operation of the machine tool 200 is stopped, the lubricating oil remaining in the linear guide 50 or sliding part 56 travels along the surface of the bed 21 and is directed towards the guide cover 61 by gravity. The lubricating oil is guided diagonally downward by the base 71 in the guide cover 61 and then enters the gutter 81 through the gap 73. The lubricating oil flows in the first direction 510 in the gutter 81 and falls through the opening 82 into the guide part 91. Guided by the guide part 91, the lubricating oil moves diagonally downward and is received by the oil receiving part 22. The lubricating oil received in the oil receiving part 22 is collected through the notch 24 into the oil recovery box installed directly below the notch 24.

[0068] To summarize the configuration of the machine tool 200 in the embodiment of the present invention described above, the machine tool 200 in this embodiment comprises a bed 21, a guide cover 61 attached to the bed 21 for guiding oil, and a coolant processing device 130 arranged adjacent to the bed 21. The guide cover 61 has a movable part 76 that can operate between a first state Cs and a second state Ct. The guide cover 61 is configured to guide oil toward the coolant processing 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] With this configuration, when the coolant processing device 130 is positioned 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 processing device 130. When the coolant processing device 130 is not positioned 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 ensures that oil is reliably recovered regardless of whether the coolant processing device 130 is present or not.

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

[0071] Furthermore, the coolant processing 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 as not to interfere with the coolant processing device 130 when it is in a first state Cs, when it is moving between the first position Pa and the second position Pb, and so as not to interfere with the coolant processing device 130 when it is in a second state Ct.

[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 processing device 130 from the first position Pa to the second position Pb.

[0073] Furthermore, the guide cover 61 is attached to the bed 21 and has a base portion 71 extending diagonally downward from the bed 21, a movable portion 76 rotatably connected to the lower end portion 71u of the base portion 71, a trough portion 81 connected to the base portion 71 and positioned directly below the lower end portion 71u of the base portion 71, and a guide portion 91 extending from the trough portion 81 toward the bed 21. When in the first state Cs, the movable portion 76 extends diagonally downward from the lower end portion 71u of the base portion 71 toward the coolant processing device 130, and when in the second state Ct, it extends diagonally upward from the gap 73 while maintaining a gap 73 with the lower end portion 71u of the base portion 71.

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

[0075] Furthermore, the machine tool 200 includes a movable body (second workpiece spindle and tool post) that moves in the Z-axis direction relative to the bed 21 as a predetermined direction, and a guide mechanism (linear guide 50 and sliding part 56) to which lubricating oil is supplied and to guide the movable body in the Z-axis direction. The base 71, movable part 76 and trough 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 part 56) can be recovered more reliably, regardless of the position in the Z-axis direction.

[0077] The machine tool 200 comprises a bed 21, a guide cover 61 attached to the bed 21 for guiding oil, and a coolant processing device 130 positioned adjacent to the bed 21. The guide cover 61 has a movable part 76 that can move between a first state Cs and a second state Ct. The coolant processing device 130 is movable between a first position Pa adjacent to the bed 21 and a second position Pb away from the bed 21. When the movable part 76 is in the first state Cs, the guide cover 61 overlaps with the coolant processing device 130 when viewed in the direction of movement of the coolant processing 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 processing device 130 when viewed in the direction of movement of the coolant processing device 130 (second direction 520).

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

[0079] Furthermore, the movement of the movable part between the first and second states in the present invention is not limited to rotational movement, but may also be, for example, a sliding movement.

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

[0081] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0082] 21 Bed, 22 Oil tray, 24 Notch, 23 Rail mounting section, 23a Top surface, 23b Front surface, 31 Saddle, 32 Cross feed table, 33 Base, 41 First workpiece spindle, 50 Linear guide, 51, 51A, 51B Guide rail, 52, 52A, 52B Slider, 56, 56A, 56B Sliding part, 61 Guide cover, 71 Base, 71m First part, 71n Second part, 71u Lower end, 72 Hinge, 73 Gap, 76 Movable part, 76p Third part, 76q Fourth part, 76v Bent part, 81 Gutter, 82, 212 Opening, 91 Guide section, 101 Rotational axis, 106 Rotational axis, 110 Coolant tank, 111, 127 Wheels, 120 Chip conveyor, 121 Cover section, 121j Edge section, 121k Rising section, 122 Chip receiving port, 123 Chip discharge port, 126 Conveying device, 130 Coolant processing device, 200 Machine tool, 210 Machine tool 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. A bed and A guide cover attached to the bed for guiding oil, The bed is provided with a coolant processing device positioned adjacent to it, The guide cover has a movable part that can operate between a first state and a second state. A machine tool wherein 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. A bed and A guide cover attached to the bed for guiding oil, The bed is provided with a coolant processing device positioned adjacent to it, The guide cover has a movable part that can operate between a first state and a second state. The coolant processing device is movable between a first position adjacent to the bed and a second position away from the bed. A machine tool wherein the guide cover overlaps with the coolant processing device when the movable part is in the first state, when viewed in the direction of movement of the coolant processing device, and does not overlap with the coolant processing device when the movable part is in the second state, when viewed in the direction of movement of the coolant processing device.

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

4. The aforementioned guide cover is A base attached to the bed and extending diagonally downward from the bed, The movable part is rotatably connected to the lower end of the base, A trough is connected to the base and positioned directly below the lower end of the base, It has a guide portion extending from the trough portion toward the bed, The machine tool according to claim 1, wherein the movable part, when in the first state, extends diagonally downward from the lower end of the base toward the coolant processing device, and when in the second state, extends diagonally upward from the gap while maintaining a gap with the lower end of the base.

5. A movable body that moves in a predetermined direction relative to the bed, The system further comprises a lubricating oil supply and a guide mechanism for guiding the moving body in the predetermined direction, The machine tool according to claim 4, wherein the base, the movable part, and the trough extend in parallel with the guide mechanism in the predetermined direction.

Images