Working machinery

Abstract

This machine tool (1) comprises a support body part (2), a table (6) that is supported by the support body part (2) and that supports a workpiece (Wa, Wb), and a tool (T) that is supported by the support body part (2), that is configured to be relatively movable with respect to the table (6), and that machines the workpiece (Wa, Wb). The support body part (2) comprises: a near oil pan opening (81) and a distant oil pan opening (82) provided below the tool (T) within a machining chamber (MA) that surrounds the table (6) and the tool (T); and at least one oil pan pillar (84) that is provided between the near oil pan opening (81) and the distant oil pan opening (82), and that partitions between the near oil pan opening (81) and the distant oil pan opening (82).

Description

[Technical Field]

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

[0002] A machine tool includes a bed, a table supported by the bed for supporting a workpiece, and a tool supported by the bed and configured to be movable relative to the bed for machining the workpiece. In the machine tool, cutting chips scatter within a machining chamber as the workpiece is machined. Patent Document 1 discloses a technique for carrying the cutting chips out of the machine tool through an opening provided in the bed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-186900 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above technology, for example, if a large amount of cutting chips is generated, there is a concern that the chips may accumulate around the opening. In such a case, it is conceivable to enlarge the opening in order to allow a large amount of cutting chips to be discharged through the opening. However, if the opening is enlarged too much, there is a risk that the rigidity of the entire machine tool will decrease. The decrease in rigidity of the machine tool will affect the machining accuracy of the workpiece.

[0005] The present invention has been made in view of the above background, and aims to provide a machine tool that discharges a large amount of cutting chips from an opening while suppressing a decrease in rigidity. [Means for solving the problem]

[0006] One aspect of the present invention is A support main body portion; a workpiece support portion supported by the support body portion and supporting a workpiece; a tool supported by the support body and configured to be movable relative to the workpiece support portion, the tool configured to machine the workpiece; Equipped with The support body is provided in a machining chamber surrounding the workpiece support and the tool. a plurality of openings below the tool; At least one pillar provided between the plurality of openings and separating the plurality of openings; The machine tool is equipped with [Effects of the Invention]

[0007] By providing a plurality of openings below the tool, more cutting chips can be discharged from the openings than when there is only one opening.

[0008] Furthermore, since pillars are provided between the multiple openings, even if the opening area of ​​the openings is increased, the rigidity of the support body can be prevented from decreasing, and as a result, even if multiple openings are provided, the machining accuracy of the workpiece can be ensured. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a partially cutaway side view of the machine tool of the first embodiment as seen from the side (X-axis direction). FIG. [Figure 2] 2 is a cross-sectional view of the machine tool in FIG. 1 as seen from above (Y-axis direction) on the paper surface, with the pallet, table, and rails omitted. [Figure 3] FIG. 2 is an enlarged cross-sectional view of a portion of the machine tool in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0010] (Embodiment 1) 1. Configuration of machine tool 1 The configuration of machine tool 1 will be described with reference to Figures 1 to 4. As shown in Figure 1, machine tool 1 is exemplified by a machining center that can position at least a tool T so that its central axis is horizontal.

[0011] Therefore, in this embodiment, the machine tool 1 is configured such that the central axis of the tool T coincides with the horizontal direction. That is, in the machine tool 1 in this embodiment, the direction that coincides with the central axis of the tool T, of the two orthogonal horizontal axes, is defined as the Z-axis direction, the other of the two orthogonal horizontal axes that is orthogonal to the Z-axis direction is defined as the X-axis direction, and the vertical direction is defined as the Y-axis direction.

[0012] In addition to the configuration described below, the machine tool 1 can also be configured to be able to change the orientation of the tool T so that the central axis of the tool T is in a direction different from the horizontal direction, in addition to the orientation in which the central axis of the tool T is aligned with the horizontal direction. In this case, the machine tool 1 is provided with, for example, a turning mechanism for changing the orientation of the spindle head 5 (described later) that holds the tool T, so that the central axis of the tool T can be changed between the horizontal direction and the vertical direction.

[0013] In this embodiment, the machine tool 1 includes a support body 2, a column 3, a saddle 4, a spindle head 5, a table 6 (workpiece support), a pair of pallets 7a and 7b, a pallet changer 8, and an overall cover 9. The support body 2 includes a bed 2a and an oil pan 2b (plate material). The machine tool 1 also includes a chip conveyor 100. Here, in the machine tool 1 of this embodiment, the spindle head 5 that holds the tool T moves in the X-axis direction and the Y-axis direction relative to the bed 2a, and the table 6 that holds the workpieces Wa and Wb moves in the Z-axis direction relative to the bed 2a. However, the machine tool 1 may be configured such that at least the spindle head 5 moves in the Y-axis direction, and either the spindle head 5 or the table 6 moves in the X-axis direction and the Z-axis direction.

[0014] Bed 2a is installed on the installation surface of machine tool 1. In this embodiment, bed 2a has, for example, a rectangular upper surface. However, the shape of bed 2a can be determined arbitrarily. On the upper surface of bed 2a, rail 21 extending in the X-axis direction and rail 22 extending in the Z-axis direction are provided. In detail, rail 21 is arranged to form the upper side of the T-shape, and rail 22 is arranged to form the vertical line portion of the T-shape.

[0015] The column 3 is supported by rails 21 that extend in the X-axis direction on the bed 2a and is provided so as to be movable in the X-axis direction relative to the bed 2a. The column 3 is linearly driven by an X-axis drive device (not shown) such as a ball screw device or a linear motor. As shown in FIG. 1, the column 3 has rails 31 that extend in the Y-axis direction on a plane normal to the Z-axis direction.

[0016] The saddle 4 is supported by rails 31 extending in the Y-axis direction on the column 3, and is provided so as to be movable in the Y-axis direction relative to the column 3. The saddle 4 is linearly driven by a Y-axis drive device (not shown), such as a ball screw device or a linear motor. The tool T can be attached and detached to the spindle head 5. Therefore, the tool T attached to the spindle head 5 is replaceable. The spindle head 5 includes a spindle housing and a spindle rotatably supported by the spindle housing, and the tool T is rotatably held at the tip of the spindle. The tool T is disposed above the bed 2a.

[0017] The table 6 is disposed above the bed 2a and supports one of the workpieces Wa, Wb. However, in this embodiment, the table 6 supports one of the workpieces Wa, Wb via one of the pallets 7a, 7b (described later).

[0018] As shown in FIG. 1 , the table 6 is supported by rails 22 extending in the Z-axis direction on the bed 2a, and is provided so as to be movable in the Z-axis direction relative to the bed 2a. Therefore, the table 6 moves relatively toward and away from the column 3, saddle 4, and spindle head 5 in the horizontal direction. In other words, the table 6 is configured so as to be movable relative to the tool T attached to the spindle head 5. The table 6 includes a table main body 41 and a rotary table 42. The table main body 41 is supported by the rails 22, and moves in the Z-axis direction relative to the bed 2a. The rotary table 42 is supported on the upper surface of the table main body 41 so as to be rotatable about a vertical axis (B-axis).

[0019] The table body 41 is linearly driven by a Z-axis driving device (not shown) such as a ball screw device or a linear motor, etc. The rotary table 42 is rotationally driven by a turning driving device (not shown) such as a motor.

[0020] As the table body 41 moves in the Z-axis direction, the table 6 can move relatively between a processing position MP indicated by a solid line and a retracted position EP indicated by a two-dot chain line in Fig. 1. When the table 6 is moved to the processing position MP, the workpiece Wa supported by the table 6 is processed by the tool T. When the table 6 is moved to the retracted position EP, the workpiece Wa supported by the table 6 is separated from the tool T.

[0021] As shown in Fig. 1, the pallets 7a and 7b support the workpieces Wa and Wb. The pallets 7a and 7b may support the workpieces Wa and Wb via a workpiece mounting jig (not shown). Furthermore, the pallets 7a and 7b are detachably mounted on the upper surface of the table 6. In this embodiment, the pallets 7a and 7b are detachably mounted on the upper surface of the rotary table 42.

[0022] The pallet exchange device 8 is rotatable about a vertical axis and can hold a pair of pallets 7a, 7b. The pallet exchange device 8 exchanges the pair of pallets 7a, 7b between an installation position on the table 6 and a mounting table 78 at the setup position by rotating 180 degrees about the vertical axis. The installation position on the table 6 and the setup position are located at positions offset by 180 degrees around the rotation axis of the pallet exchange device 8. Furthermore, the installation position on the table 6, the setup position, and the rotation axis of the pallet exchange device 8 are located on a straight line in the Z-axis direction. In the Z-axis direction, the installation position on the table 6 is located closer to the column 3 and saddle 4, and the setup position is located farther from the column 3 and saddle 4.

[0023] The pallet exchange device 8 comprises a rotating shaft member 51, a first pallet holding member 52, a first compartment cover 53, a second pallet holding member 54, and a second compartment cover 55. The rotating shaft member 51 extends vertically from the upper surface of the bed 2a and is provided so as to be rotatable about a vertical axis relative to the bed 2a. The rotating shaft member 51 is driven to rotate by a rotating drive device (not shown) such as a motor.

[0024] The first pallet holding member 52 and the second pallet holding member 54 are capable of supporting the pallets 7a, 7b, and transfer the pallets 7a, 7b between them and the table 6. The first pallet holding member 52 and the second pallet holding member 54 are formed, for example, in a fork shape extending radially outward from the pivot shaft member 51 about the pivot axis. The first pallet holding member 52 and the second pallet holding member 54 can be formed in a variety of shapes.

[0025] As shown in FIG. 2, the first compartment cover 53 and the second compartment cover 55 are U-shaped in a plan view. The U-shape may be a U-shape with corners as shown in FIG. 2, or a curved U-shape without corners. Note that the pallets 7a and 7b, the table 6, and the rails 22 are omitted from FIG. 2. The first compartment cover 53 and the second compartment cover 55 each have a pair of parallel side walls 56 and a connecting wall 57 connecting one end to the side wall 56. The first compartment cover 53 defines the area of ​​the pallet 7a held by the first pallet holding member 52. Specifically, the first compartment cover 53 surrounds a portion of the pallet 7a in the horizontal direction and opens radially outward around the pivot axis of the pallet exchange device 8. In FIG. 2, the first compartment cover 53 opens on the column 3 and saddle 4 side (the right side in FIG. 2) of the horizontal periphery of the pallet 7a and defines the remaining portion.

[0026] The second compartment cover 55 defines the area of ​​the pallet 7b held by the second pallet holding member 54. Specifically, the second compartment cover 55 surrounds a portion of the horizontal direction of the pallet 7b and opens radially outward around the rotation axis of the pallet exchange device 8. In Figure 2, the second compartment cover 55 opens on the side of the horizontal periphery of the pallet 7b opposite the column 3 and saddle 4 (the left side in Figure 2), and defines the remaining portion.

[0027] The overall cover 9 is attached to the bed 2a and is a cover that encloses the elements on the bed 2a of the machine tool 1. In particular, the overall cover 9 encloses the machining chamber MA. The machining chamber MA encloses the table 6 and the tool T. In this embodiment, the overall cover 9 includes a left front cover 61, a right front cover 62, a first left side cover 63, a second left side cover 64, a first right side cover 65, a second right side cover 66, a rear cover 67, and a ceiling cover 68.

[0028] The left front cover 61 and the right front cover 62 are provided on part of the front surface (the left side in FIG. 2) of the machine tool 1. The space between the left front cover 61 and the right front cover 62 is a work area for replacing the pallet 7b located in the setup position. The left front cover 61 and the right front cover 62 cover the entire front surface of the machine tool 1, and a front door, for example, may be provided.

[0029] The first left side cover 63 and the first right side cover 65 cover the sides of the processing chamber MA and the setup area for the pallets 7a and 7b. In addition to the first left side cover 63 and the first right side cover 65, the processing chamber MA is partitioned by the first compartment cover 53 or the second compartment cover 55 that configure the pallet exchange device 8.

[0030] 2, the first left side cover 63 and the first right side cover 65 are formed to reduce the gap between them and both ends of the U-shape of the first compartment cover 53 or the second compartment cover 55. In detail, the first left side cover 63 and the first right side cover 65 extend continuously along the pair of side walls 56 of the first compartment cover 53 and the second compartment cover 55, respectively, and have a first narrow portion 63a and a second narrow portion 64a that are narrower in the X-axis direction than other portions of the first left side cover 63 and the first right side cover 65.

[0031] The first right side cover 65 has an access opening 65a at a location to the side of the machining chamber MA. In other words, the access opening 65a opens to the side of the direction (Z-axis direction) in which the spindle head 5 is removed from the saddle 4. The access opening 65a is a place where the spindle head 5 is carried in and out between the inside and outside of the machine tool 1.

[0032] The processing chamber MA is defined by the first compartment cover 53 or the second compartment cover 55, the first narrow portion 63a, the second narrow portion 64a, and the processing chamber compartment covers 11 and 12 described below, and is formed in a rectangular shape that is elongated in the Z-axis direction (longitudinal direction) in a plan view. A pair of side walls 56 of the first compartment cover 53 or the second compartment cover 55 form part of the long sides of the rectangle that defines the processing chamber MA, and a connecting wall 57 of the first compartment cover 53 or the second compartment cover 55 forms the short sides of the rectangle that defines the processing chamber MA.

[0033] The second left side cover 64 and the second right side cover 66 cover the sides of the non-cutting area where the column 3 and saddle 4 are arranged. The rear cover 67 covers the rear side of the non-cutting area where the column 3 is arranged. The ceiling cover 68 covers the entire area above the bed 2a.

[0034] The work door 10 is provided on the first right side cover 65 of the overall cover 9 and is a door that enables the work opening 65a of the first right side cover 65 to be opened and closed. The work door 10 is opened when an operator works in the machining chamber MA. Furthermore, the work door 10 is also opened when an operator works to attach or detach the spindle head 5.

[0035] The machining chamber partition covers 11, 12 are configured, for example, by Telesco (registered trademark) covers. The machining chamber partition covers 11, 12 separate the machining chamber MA from a non-machining area where the column 3 and saddle 4 are located. Furthermore, the machining chamber partition covers 11, 12 follow the movement of the spindle head 5 in the X-axis and Y-axis directions.

[0036] For example, a tool magazine or the like can be installed outside the first left side cover 63. In this case, an opening is formed in the first left side cover 63 to allow the tool changer to operate.

[0037] 2. Structure of cutting chip discharge mechanism The configuration of the cutting chip discharge mechanism will be described with reference to Figures 2 to 4. The cutting chip discharge mechanism is a mechanism for discharging cutting chips generated in the machining chamber MA to the outside. The cutting chip discharge mechanism includes a support main body 2, a chip conveyor 100, and a nozzle 89.

[0038] As shown in Fig. 2, in the region of the upper surface of the bed 2a surrounded by the machining chamber MA, an oil pan 2b, which is rectangular and elongated in the Z-axis direction in a plan view, is disposed with a gap in the vertical direction between it and the upper surface of the bed 2a. The outer shape of the oil pan 2b is the same as or slightly smaller than the inner shape of the machining chamber MA. However, the oil pan 2b may be disposed in contact with the upper surface of the bed 2a.

[0039] The oil pan 2b is made of a flat plate material. The material of the oil pan 2b is different from the material of the bed 2a. The material of the oil pan 2b is not particularly limited, and known materials such as metal and ceramic can be appropriately selected. In order to maintain the ease of sliding of cutting chips generated when the workpiece is machined, the material of the oil pan 2b is preferably harder than the material of the bed 2a. The oil pan 2b in this embodiment is preferably made of metal, for example, stainless steel.

[0040] Within the machining chamber MA, a nozzle 89 for discharging a cleaning fluid is provided above the oil pan 2b in an area opposite the spindle head 5. The nozzle 89 may be attached to the top or side of the oil pan 2b, or may be attached at a position above and away from the oil pan 2b using a known holding structure. A pair of nozzles 89 are provided in the machining chamber MA, near both ends in the X-axis direction. The number of nozzles 89 is not limited, and may be one, or three or more. The form of the nozzle 89 is not particularly limited, and it may be arranged in any position, such as by being attached to the ceiling of the machining chamber MA or by being provided within the machining chamber MA near the spindle head 5.

[0041] The oil pan 2b has multiple (two in this embodiment) openings 81, 82 aligned in the Z-axis direction (arrangement direction). The two openings 81, 82 are defined as a nearest oil pan opening 81 (a nearest opening, a plate opening) and a remote oil pan opening 82 (a remote opening, a plate opening). However, the number of openings may be three or more. The nearest oil pan opening 81 and the remote oil pan opening 82 are rectangular in shape and elongated in the Z-axis direction (longitudinal direction) in a plan view. The nearest oil pan opening 81 and the remote oil pan opening 82 are located below the tool T, and the nearest oil pan opening 81 is located directly below the tool T and the spindle head 5. Note that "below" means below the tool T in the vertical direction, and includes, for example, a direction directly below the tool T in the vertical direction as well as a direction oblique to the extension direction. The remote oil pan opening 82 is located slightly farther away from the table 6 in the Z-axis direction than the nearest oil pan opening 81 when the table 6 has moved to the machining position MP. The nozzle 89 described above is located near the remote oil pan opening 82. The nearest oil pan opening 81 and the remote oil pan opening 82 are aligned along the movement path of the table 6 when the table 6 moves between the machining position MP and the retracted position EP. However, the shapes of the nearest oil pan opening 81 and the remote oil pan opening 82 are not particularly limited, and any shape can be selected, such as a circle, an oval, or a polygon.

[0042] In this embodiment, the nearest oil pan opening 81 and the remote oil pan opening 82 are formed to have the same shape and size. However, the nearest oil pan opening 81 and the remote oil pan opening 82 may have different shapes or sizes.

[0043] 2 and 3, oil pan 2b has an oil pan pillar 84 (plate pillar) between the nearest oil pan opening 81 and the remote oil pan opening 82. The nearest oil pan opening 81 and the remote oil pan opening 82 are separated by the oil pan pillar 84. However, the number of oil pan pillars 84 may be two or more.

[0044] The oil pan pillar 84 has an elongated shape along the X-axis direction. A pair of oil pan pillar inclined surfaces 85 (plate pillar inclined surfaces) are formed on the upper surface of the oil pan pillar 84, inclining downward as they approach the edge of the nearest oil pan opening 81 and the remote oil pan opening 82. As shown in FIG. 3 , when viewed from the X-axis direction, the pair of oil pan pillar inclined surfaces 85 form a mountain shape that protrudes upward at an acute angle. The inclination angles of the pair of oil pan pillar inclined surfaces 85 are formed to be the same. However, "same" includes cases where they are the same, and also includes cases where they can be recognized as substantially the same even if they are not the same. The same applies hereinafter. However, the angles of the pair of oil pan pillar inclined surfaces 85 may be different from each other.

[0045] 2, oil pan 2b includes an oil pan outer frame portion 86 that covers the hole edges of nearest oil pan opening 81 and remote oil pan opening 82, excluding oil pan pillars 84. An oil pan outer frame portion inclined surface 87 is formed on the upper surface of oil pan outer frame portion 86, and is inclined downward as it approaches the hole edges of nearest oil pan opening 81 and remote oil pan opening 82.

[0046] 3, the inclination angle of the pair of oil pan pillar inclined surfaces 85 is set to be larger than the inclination angle of the oil pan outer frame portion inclined surfaces 87. In other words, the inclination angle of the pair of oil pan pillar inclined surfaces 85 is formed to be steeper than the inclination angle of the oil pan outer frame portion inclined surfaces 87.

[0047] At the nearest oil pan opening 81, the inclination angle of the oil pan outer frame inclined surface 87a formed on the hole edge portion closer to the spindle head 5 in the Z-axis direction among the oil pan outer frame inclined surfaces 87 is steeper than the inclination angle of the oil pan outer frame inclined surface 87b formed on the hole edge portion intersecting with the X-axis direction.

[0048] At the remote oil pan opening 82, the inclination angle of the oil pan outer frame inclined surface 87c, which is formed on the hole edge portion opposite the spindle head 5 in the Z-axis direction, is gentler than the inclination angle of the oil pan outer frame inclined surface 87d, which is formed on the hole edge portion intersecting with the X-axis direction.

[0049] In this embodiment, the inclination angle of oil pan outer frame portion inclined surface 87b formed on the hole edge portion perpendicular to the X-axis direction in the nearest oil pan opening 81 and the inclination angle of oil pan outer frame portion inclined surface 87d formed on the hole edge portion perpendicular to the X-axis direction in the remote oil pan opening 82 are formed to be the same. However, the inclination angle of oil pan outer frame portion inclined surface 87c formed on the hole edge portion intersecting the X-axis direction in the nearest oil pan opening 81 and the inclination angle of oil pan outer frame portion inclined surface 87d formed on the hole edge portion intersecting the X-axis direction in the remote oil pan opening 82 do not have to be the same.

[0050] 3, a nearest bed opening 71 (nearest opening, bed opening) that penetrates the bed 2a in the up-down direction is formed in the bed 2a at a position that overlaps with the nearest oil pan opening 81 when viewed from the Y-axis direction. The shape of the hole edge of the nearest bed opening 71 is formed to be slightly larger than the shape of the hole edge of the nearest oil pan opening 81. However, the shape of the hole edge of the nearest bed opening 71 may be the same as the shape of the hole edge of the nearest oil pan opening 81.

[0051] Furthermore, a remote bed opening 72 (remote opening, bed opening) that penetrates the bed 2a in the up-down direction is formed in the bed 2a at a position that overlaps with the remote oil pan opening 82 when viewed from the Y-axis direction. The shape of the hole edge of the remote bed opening 72 is formed to be slightly larger than the shape of the hole edge of the remote oil pan opening 82. However, the shape of the hole edge of the remote bed opening 72 may be the same as the shape of the hole edge of the remote oil pan opening 82.

[0052] The nearest bed opening 71 and the remote bed opening 72 have a rectangular shape that is long in the Z-axis direction when viewed in a plan view. The nearest bed opening 71 and the remote bed opening 72 may have the same shape and size, or they may be different from each other. The shapes of the nearest bed opening 71 and the remote bed opening 72 are not particularly limited, and any shape can be selected, such as a circle, an oval, or a polygon.

[0053] The bed 2a has a bed pillar 73 between the nearest bed opening 71 and the remote bed opening 72. The nearest bed opening 71 and the remote bed opening 72 are separated by the bed pillar 73. However, the number of bed pillars 73 may be two or more. The bed pillar 73 is formed at a position overlapping with the oil pan pillar 84 when viewed from the Y-axis direction.

[0054] The bed pillar 73 is elongated in the X-axis direction. A pair of bed pillar inclined surfaces 74 are formed on the upper surface of the bed pillar 73, which slope downward as they approach the hole edges of the nearest bed opening 71 and the remote bed opening 72. This creates a chamfered boundary between the upper surface and side surface of the bed pillar 73. The bed pillar inclined surfaces 74 and the lower surface of the oil pan pillar inclined surface 85 face each other with a gap in the Y-axis direction.

[0055] On the upper surface of the bed 2a, a counterbore 75 is formed in the area near the hole edge of the nearest bed opening 71 and the hole edge of the remote bed opening 72, opening upward and expanding in diameter. As a result, on the upper surface of the bed 2a, the hole edge of the nearest bed opening 71 and the hole edge of the remote bed opening 72 expand upward in diameter. The upper surface of the counterbore 75 and the lower surface of the oil pan outer frame inclined surface 87 face each other with a gap in the Y-axis direction.

[0056] As shown in Figures 3 and 4, a plurality of support ribs 88 protruding downward are formed on the underside of the oil pan outer frame inclined surface 87. The undersides of the support ribs 88 are horizontal. A plurality of support base portions 76 protruding upward are formed on the upper surface of the counterbore portion 75 of the bed 2a. The upper surfaces of the support base portions 76 are horizontal. The lower surfaces of the support ribs 88 are placed on the upper surfaces of the support base portions 76, so that the oil pan outer frame portion 86 is supported by the counterbore portion 75 via the support ribs 88 and the support base portions 76.

[0057] 1, the chip conveyor 100 includes a conveyor 101 that is long in the Z-axis direction and a cover 102 that covers the conveyor 101. The conveyor 101 is disposed below the remote bed opening 72 and the nearest bed opening 71 of the bed 2a, is long in the Z-axis direction, and includes a lateral section 101a that transports chips horizontally, and an ascending section 101b that extends diagonally upward from one end of the lateral section 101a and transports chips upward.

[0058] The lateral movement portion 101a of the conveyor 101 is disposed below the remote bed opening 72 and the nearest bed opening 71 of the bed 2a. As described above, the remote bed opening 72 is disposed below the remote oil pan opening 82, and the nearest bed opening 71 is disposed below the nearest oil pan opening 81. As a result, cutting chips generated when the workpiece Wa is machined by the tool T in the machining chamber MA pass from the machining chamber MA through the remote oil pan opening 82 and the nearest oil pan opening 81, as well as the remote bed opening 72 and the nearest bed opening 71, and fall onto the lateral movement portion 101a.

[0059] 3 and 4, a storage recess 77 that opens downward is formed on the underside of the bed 2a to store the chip conveyor 100. The storage recess 77 is provided below the nearest bed opening 71 and the remote bed opening 72.

[0060] The chips are transported in the Z-axis direction by the horizontal section 101a of the conveyor 101, then transported upward by the upward section 101b and discharged to the outside from the end of the upward section 101b. The chips are collected in a chip bucket (not shown) located below the end of the upward section 101b.

[0061] 3.Effects According to the machine tool 1 of this embodiment, a remote oil pan opening 82 and a nearest oil pan opening 81 are provided below a tool T disposed in a machining chamber MA. An oil pan pillar 84 is provided between the remote oil pan opening 82 and the nearest oil pan opening 81. The oil pan pillar 84 separates the remote oil pan opening 82 from the nearest oil pan opening 81.

[0062] By providing a remote oil pan opening 82 and a nearest oil pan opening 81 below the tool T, more cutting chips can be discharged from the remote oil pan opening 82 and the nearest oil pan opening 81 than when there is only one opening.

[0063] The oil pan 2b constituting the support body 2 is provided with an oil pan pillar 84, so even if multiple openings are provided to increase the opening area of ​​the openings, it is possible to prevent a decrease in the rigidity of the support body 2. As a result, it is possible to ensure the machining accuracy of the workpiece Wa.

[0064] The table 6 is movable between a processing position MP, where a workpiece Wa supported by the table 6 is processed by a tool T, and a retracted position EP, which is spaced from the processing position MP. When the workpiece is processed by a tool at the processing position MP, cutting chips are generated. Furthermore, when the table 6 moves to the retracted position EP, cutting chips attached to the table 6, the workpiece Wa, or the tool T move with the movement of the table 6. Therefore, there is a concern that the cutting chips will spread along the movement path of the table 6 between the processing position MP and the retracted position EP. In this embodiment, the remote oil pan opening 82 and the nearest oil pan opening 81 are aligned along the movement path of the table 6 when it moves between the processing position MP and the retracted position EP. Because the remote oil pan opening 82 and the nearest oil pan opening 81 are aligned along the movement path of the table 6, cutting chips attached to the table 6, the workpiece Wa, or the tool T can be discharged from the remote oil pan opening 82 and the nearest oil pan opening 81. This prevents cutting chips from being scattered inside the machining chamber MA.

[0065] A nearest oil pan opening 81 is provided at a position closest to the machining position MP, and a remote oil pan opening 82 is provided at a position distant from the nearest oil pan opening 81. A nozzle 89 for discharging cleaning fluid is provided near the remote oil pan opening 82. The cleaning fluid discharged from the nozzle 89 can sweep away cutting chips toward the remote oil pan opening 82, which is located away from the tool T. This allows cutting chips that have scattered to a position distant from the tool during machining of the workpiece Wa and cutting chips that have moved along with the table 6 to be efficiently discharged from the remote oil pan opening 82. In this embodiment, the cleaning fluid discharged from the nozzle 89 flows only toward the remote oil pan opening 82 and does not flow toward the nearest oil pan opening 81. However, the cleaning fluid discharged from the nozzle 89 may be configured to flow toward both the remote oil pan opening 82 and the nearest oil pan opening 81.

[0066] A pair of oil pan pillar inclined surfaces 85 are formed on the upper surface of the oil pan pillar 84. Cuttings that fall onto the oil pan pillar inclined surfaces 85 fall along the oil pan pillar inclined surfaces 85, which slope downward as they approach the hole edges of the remote oil pan opening 82 and the nearest oil pan opening 81, and are discharged to the outside from the remote oil pan opening 82 and the nearest oil pan opening 81. This allows cuttings to be quickly discharged to the outside of the machine tool 1.

[0067] The inclination angles of the pair of oil pan pillar inclined surfaces 85 are set to be the same. Because the inclination angles of the pair of oil pan pillar inclined surfaces 85 are the same, cutting chips that fall onto the oil pan pillar 84 from above move smoothly into the remote oil pan opening 82 and the nearest oil pan opening 81 without getting caught on the oil pan pillar 84. This allows the cutting chips to be quickly discharged from the remote oil pan opening 82 and the nearest oil pan opening 81.

[0068] The inclination angle of the pair of oil pan pillar inclined surfaces 85 is set larger than the inclination angle of the oil pan outer frame inclined surface 87. Cuttings that fall onto the oil pan outer frame inclined surface 87 fall along the oil pan outer frame inclined surface 87, which slopes downward as it approaches the hole edges of the remote oil pan opening 82 and the nearest oil pan opening 81, and are discharged to the outside from the remote oil pan opening 82 and the nearest oil pan opening 81. This allows cuttings to be quickly discharged to the outside.

[0069] Furthermore, because cutting chips are formed when the workpiece Wa is machined into the tool T, they have irregular shapes. For this reason, there is a concern that cutting chips that fall onto the oil pan pillar 84 will become caught on the oil pan pillar 84. According to this embodiment, the inclination angle of the oil pan pillar inclined surface 85 formed on the oil pan pillar 84 is set to be larger than the inclination angle of the oil pan outer frame portion inclined surface 87 formed on the oil pan outer frame portion 86. Therefore, cutting chips that fall onto the oil pan pillar inclined surface 85 quickly slide down the oil pan pillar inclined surface 85 and fall into the remote oil pan opening 82 and the nearest oil pan opening 81. This prevents cutting chips from becoming caught on the oil pan pillar 84, allowing the cutting chips to be quickly discharged from the remote oil pan opening 82 and the nearest oil pan opening 81.

[0070] An oil pan 2b is disposed on the upper surface of the bed 2a. The bed 2a has a remote bed opening 72 and a nearest bed opening 71 that penetrate the bed 2a in the vertical direction. The remote bed opening 72 and the remote oil pan opening 82 are arranged to overlap in the vertical direction, and the nearest bed opening 71 and the nearest oil pan opening 81 are arranged to overlap in the vertical direction. A bed pillar 73 is formed between the remote bed opening 72 and the nearest bed opening 71. The bed pillar 73 and the oil pan pillar 84 are arranged to overlap in the vertical direction. A bed pillar inclined surface 74 is formed on the upper surface of the bed pillar 73, which slopes downward as it approaches the hole edges of the remote bed opening 72 and the nearest bed opening 71.

[0071] The formation of the bed pillar inclined surface 74 improves the rigidity of the bed pillar 73. This makes it possible to prevent a decrease in the rigidity of the bed 2a even when the remote bed opening 72 and the nearest bed opening 71 are formed in the bed 2a. As a result, it is possible to ensure the machining accuracy of the workpiece Wa.

[0072] The bed 2a may be manufactured by casting. In such cases, the surface of the bed 2a is relatively rough. Therefore, if chips fall onto the upper surface of the bed 2a, they may have difficulty moving along the upper surface of the bed 2a, which may hinder their discharge from the remote bed opening 72 and the nearest bed opening 71. Therefore, by attaching an oil pan 2b made of a different material to the upper surface of the bed 2a, chips that fall onto the upper surface of the oil pan 2b can move smoothly along the upper surface of the oil pan 2b. This allows the chips to quickly move to the remote oil pan opening 82 and the nearest oil pan opening 81 and be discharged from the remote bed opening 72 and the nearest bed opening 71, which are positioned so as to overlap the remote oil pan opening 82 and the nearest oil pan opening 81, respectively.

[0073] Furthermore, since the oil pan pillar 84 is formed with an oil pan pillar inclined surface 85, cutting chips can be received by the oil pan pillar inclined surface 85. The cutting chips received by the oil pan pillar inclined surface 85 fall along the oil pan pillar inclined surface 85 and are discharged to the outside from the remote oil pan opening 82 and the nearest oil pan opening 81 through the remote bed opening 72 and the nearest bed opening 71. As a result, the cutting chips can be quickly discharged to the outside of the machine tool 1.

[0074] A chip conveyor 100 is disposed below the remote oil pan opening 82 and the nearest oil pan opening 81, as well as the remote bed opening 72 and the nearest bed opening 71. The remote oil pan opening 82 and the nearest oil pan opening 81 are aligned along the Z-axis direction, and the remote bed opening 72 and the nearest bed opening 71 are also aligned along the Z-axis direction. The chip conveyor 100 has a conveyor 101 that transports chips in the Z-axis direction. Chips that fall into the remote oil pan opening 82 and the nearest oil pan opening 81, as well as the remote bed opening 72 and the nearest bed opening 71, fall onto the traverse portion 101a of the conveyor 101, which is disposed below the remote oil pan opening 82 and the nearest oil pan opening 81, as well as the remote bed opening 72 and the nearest bed opening 71. The cutting chips are transported in the Z-axis direction by the horizontal section 101a and the ascending section 101b connected to the horizontal section 101a and discharged to the outside. This allows the cutting chips to be efficiently discharged to the outside.

[0075] Furthermore, the machining chamber MA has a rectangular shape that is elongated in the Z-axis direction, and the remote oil pan opening 82 and the nearest oil pan opening 81 also have rectangular shapes that are elongated in the Z-axis direction and are aligned in the Z-axis direction within the machining chamber MA. Because the machining chamber MA has a rectangular shape that is elongated in the Z-axis direction, the machining chamber MA can be made smaller in size in the X-axis direction. This allows the area within the machining chamber MA where cutting chips are scattered to be narrowed in the X-axis direction, so that the cutting chips can be more efficiently discharged to the outside from the remote oil pan opening 82 and the nearest oil pan opening 81 compared to when the cutting chips are scattered over a wide area.

[0076] Furthermore, since the remote oil pan opening 82 and the nearest oil pan opening 81 are aligned in the Z-axis direction, cutting chips scattered in the Z-axis direction when the workpiece Wa is machined by the tool T can be efficiently discharged to the outside of the machining chamber MA from the remote oil pan opening 82 and the nearest oil pan opening 81.

[0077] The bed 2a is equipped with two pallets 7a, 7b that are detachable from the upper surface of the bed 2a and support workpieces Wa, Wb, and a first compartment cover 53 and a second compartment cover 55 that respectively partition the areas of the two pallets 7a, 7b. The first compartment cover 53 and the second compartment cover 55 each have a pair of plate-like side walls 56 that are arranged parallel to each other, and a connecting wall 57 that connects one end of the pair of side walls 56. The pair of side walls 56 form part of the long sides of a rectangle that forms the machining chamber MA, and the connecting wall 57 forms the short sides of the rectangle that forms the machining chamber MA.

[0078] Compared to when the first compartment cover 53 and the second compartment cover 55 are flat in plan view, the first compartment cover 53 and the second compartment cover 55 can be made smaller in size in the X-axis direction. Because the first compartment cover 53 and the second compartment cover 55 form part of the machining chamber MA, the overall shape of the machining chamber MA can be made narrower in the X-axis direction. This makes it possible to narrow the area in the machining chamber MA where chips are scattered in the X-axis direction. As a result, the chips can be discharged outside the machine tool 1 more efficiently than when the chips are scattered over a wide area.

[0079] There are no particular limitations on the movement direction of the column 3, the movement direction of the table 6, or the direction in which the multiple openings 81, 82 are arranged, and the following configurations may be used. For example, when the column 3 moves in the Z-axis direction and the table 6 moves in the X-axis direction, the nearest oil pan opening 81 and the remote oil pan opening 82 may be formed side by side in the Z-axis direction along the movement path of the tool T that moves along with the column 3. When the column 3 moves in the X-axis direction and the table 6 moves in the Z-axis direction, the nearest oil pan opening 81 and the remote oil pan opening 82 may be formed side by side in the X-axis direction along the movement path of the column 3. When the column 3 moves in the Z-axis direction and the table 6 moves in the X-axis direction, the nearest oil pan opening 81 and the remote oil pan opening 82 may be formed side by side in the X-axis direction along the movement path of the table 6.

Claims

1. A support body (2), a workpiece support portion (6) supported by the support body portion and supporting the workpieces (Wa, Wb); a tool (T) supported by the support body and configured to be movable relative to the workpiece support portion, for machining the workpiece; Equipped with The support body is provided in a machining chamber (MA) surrounding the workpiece support and the tool. A plurality of openings (71, 72, 81, 82) provided below the tool; and at least one pillar (73, 84) provided between the plurality of openings and separating the plurality of openings; A pair of pillar inclined surfaces (74, 85) are formed on the upper surface of the pillar, the inclined surfaces inclining downward as they approach the edge portions of the respective openings of the plurality of openings, The support body portion is A bed (2a), A plate (2b) placed on the upper surface of the bed and made of a material different from the material constituting the bed; Equipped with the workpiece support and the tool are disposed above the bed; The plurality of openings are Bed openings (71, 72) that penetrate the bed in the vertical direction; Plate openings (81, 82) that penetrate the plate in the vertical direction and are arranged to overlap the bed opening in the vertical direction; Including, The pillar is A bed pillar (73) formed on the bed; a plate pillar (84) formed on the plate material and arranged to overlap the bed pillar in the vertical direction; Including, A plate pillar inclined surface (85) is formed on the upper surface of the plate pillar as the pillar inclined surface, The machine tool (1) has a bed pillar inclined surface (74) formed on the upper surface of the bed pillar, the bed pillar inclined surface facing the lower surface of the plate pillar inclined surface.

2. The workpiece support or the tool is a machining position (MP) where the workpiece supported by the workpiece support is machined by the tool; and a retreat position (EP) set at a position away from the processing position, 2. The machine tool according to claim 1, wherein the plurality of openings are aligned along a movement path of the workpiece support or a movement path of the tool when the workpiece support or the tool moves between the machining position and the retracted position.

3. The plurality of openings are a proximate opening (71, 81) provided nearest the processing position; a remote opening (72, 82) provided at a position spaced apart from the proximate opening, 3. The machine tool according to claim 2, wherein a nozzle (89) for discharging a cleaning fluid is provided near the separating opening.

4. 4. The machine tool according to claim 1, wherein the pair of pillar inclined surfaces have the same inclination angle.

5. the support body portion includes an outer frame portion (86) of the hole edge portions of the plurality of openings other than the pillars, An outer frame inclined surface (87) is formed on the upper surface of the outer frame, and the inclined surface (87) is inclined downward as it approaches the hole edges of the plurality of openings, 5. The machine tool according to claim 1, wherein the inclination angle of the pair of pillar inclined surfaces is set to be larger than the inclination angle of the outer frame inclined surface.

6. Further comprising a chip conveyor (100) disposed below the plurality of openings; The plurality of openings are aligned along an arrangement direction, 6. The machine tool according to claim 1, wherein the chip conveyor has a conveyor (101) that transports chips that have dropped from the plurality of openings in the arrangement direction.

7. The processing chamber has a rectangular shape that is long in the longitudinal direction, The machine tool according to any one of claims 1 to 6, wherein the plurality of openings have a rectangular shape that is long in the longitudinal direction, and are lined up in the longitudinal direction within the machining chamber.

8. The support body further includes: a pallet (7a, 7b) that is detachable from the upper surface of the workpiece support portion and supports the workpiece; and compartment covers (53, 55) that partition the area of ​​the pallet, The compartment cover is A pair of plate-shaped side walls (56) arranged parallel to each other; a connecting wall (57) connecting one end of each of the pair of side walls, The pair of side walls of the compartment cover form part of the long sides of a rectangle that forms the processing chamber, 8. The machine tool according to claim 7, wherein the connecting wall of the compartment cover defines a shorter side of a rectangle that defines the machining chamber.

9. A support body (2), a workpiece support portion (6) supported by the support body portion and supporting the workpieces (Wa, Wb); a tool (T) supported by the support body and configured to be movable relative to the workpiece support portion, for machining the workpiece; Equipped with The support body is provided in a machining chamber (MA) surrounding the workpiece support and the tool. A plurality of openings (71, 72, 81, 82) provided below the tool; and at least one pillar (73, 84) provided between the plurality of openings and separating the plurality of openings; The processing chamber has a rectangular shape that is long in the longitudinal direction, The plurality of openings have a rectangular shape that is long in the longitudinal direction and are aligned in the longitudinal direction within the processing chamber, The support body further includes: a pallet (7a, 7b) that is detachable from the upper surface of the workpiece support portion and supports the workpiece; and compartment covers (53, 55) that partition the area of ​​the pallet, The compartment cover is A pair of plate-shaped side walls (56) arranged parallel to each other; a connecting wall (57) connecting one end of each of the pair of side walls, The pair of side walls of the compartment cover form part of the long sides of a rectangle that forms the processing chamber, The connecting wall of the compartment cover is configured to define the short side of a rectangle that defines the processing chamber.

10. The workpiece support or the tool is a machining position (MP) where the workpiece supported by the workpiece support is machined by the tool; and a retreat position (EP) set at a position away from the processing position, 10. The machine tool according to claim 9, wherein the plurality of openings are aligned along a movement path of the workpiece support or a movement path of the tool when the workpiece support or the tool moves between the machining position and the retracted position.

11. The plurality of openings are a proximate opening (71, 81) provided nearest the processing position; a remote opening (72, 82) provided at a position spaced apart from the proximate opening, 11. The machine tool according to claim 10, wherein a nozzle (89) for discharging a cleaning fluid is provided near the separating opening.

12. The machine tool according to any one of claims 9 to 11, wherein a pair of pillar inclined surfaces (74, 85) that slope downward as they approach the hole edges of each of the plurality of openings are formed on the upper surface of the pillar.

13. The machine tool according to claim 12 , wherein the pair of pillar inclined surfaces have the same inclination angle.

14. the support body portion includes an outer frame portion (86) of the hole edge portions of the plurality of openings other than the pillars, An outer frame inclined surface (87) is formed on the upper surface of the outer frame, and the inclined surface (87) is inclined downward as it approaches the hole edges of the plurality of openings, 14. The machine tool according to claim 12, wherein the inclination angle of the pair of pillar inclined surfaces is set to be larger than the inclination angle of the outer frame inclined surface.

15. The support body portion is A bed (2a), A plate (2b) placed on the upper surface of the bed and made of a material different from the material constituting the bed; Equipped with the workpiece support and the tool are disposed above the bed; The plurality of openings are Bed openings (71, 72) that penetrate the bed in the vertical direction; Plate openings (81, 82) that penetrate the plate in the vertical direction and are arranged to overlap the bed opening in the vertical direction; Including, The pillar is A bed pillar (73) formed on the bed; a plate pillar (84) formed on the plate material and arranged to overlap the bed pillar in the vertical direction; Including, A plate pillar inclined surface (85) is formed on the upper surface of the plate pillar as the pillar inclined surface, The machine tool according to any one of claims 12 to 14, wherein a bed pillar inclined surface (74) facing the lower surface of the plate pillar inclined surface is formed on the upper surface of the bed pillar.

16. Further comprising a chip conveyor (100) disposed below the plurality of openings; The plurality of openings are aligned along an arrangement direction, The machine tool according to any one of claims 9 to 15, wherein the chip conveyor has a conveyor (101) that transports chips that have dropped from the plurality of openings in the arrangement direction.

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