Stand column and machine tool

Abstract

The invention provides a stand column and a machine tool capable of reducing displacement caused by twisting. In a machine tool, a spindle head extends in the Z-axis direction and is disposed on the front surface of a column 5 by a Y-axis movement mechanism. The rotary workbench is located in front of the spindle head. The spindle head is guided by a pair of guides (24) attached to attachment surfaces (52R, 52L) of the column (5) so as to be movable in the Y-axis direction (vertical direction). The mounting surface 52R is disposed at the left front end of the right wall 51A. The mounting surface 52L is disposed at the right front end of the left wall 51B. The column (5) is movable in the Z-axis direction (front-rear direction) by means of the sliding members (57, 58) being guided by a pair of guides. In a plan view, a portion of the sliding members (57, 58) is positioned further forward than the attachment surfaces (52R, 52L).

Description

Technical Field

[0001] The invention relates to a column and a machine tool. Background Art

[0002] Patent document 1 discloses a horizontal machine tool that cuts or otherwise processes a workpiece fixed on a rotating table by means of a spindle extending in a horizontal direction. A slide that can move along the X-axis (left and right) direction is provided on the base of the machine tool. A column that can move along the Z-axis (front and back) direction is provided on the slide. A spindle head that can move along the Y-axis (up and down) direction is provided on the column. The spindle is rotatably supported on the spindle head, and a tool is mounted on the spindle.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 8-108340 Summary of the invention

[0006] Problems to be solved by the invention

[0007] The column supports the spindle head so that it can move in the Y-axis direction. When machining a workpiece, the column receives a reaction force from the workpiece through the tool, the spindle, and the spindle head. The column may be twisted in the horizontal direction relative to the base due to the reaction force. When the column is twisted in the horizontal direction, the position of the tool relative to the workpiece is offset. In the case of a large displacement caused by the twist, the machine tool may not be able to perform machining accurately.

[0008] The object of the present invention is to provide a column and a machine tool capable of reducing displacement caused by twisting.

[0009] Technical means of solving problems

[0010] The column of claim 1 is arranged at a distance from a worktable fixing a cut material on the upper side of the base of the machine tool, and supports the spindle head of the spindle, and the column is characterized in that it includes: a mounting surface, which is arranged on the surface opposite to the worktable, and is used to install an up-and-down guide portion for guiding the movement of the spindle head in the up-and-down direction; and an intersecting guide portion, which is arranged on the lower wall, and guides the movement of the column in an intersecting direction intersecting with the up-and-down direction, and in a plan view, at least a part of the intersecting guide portion is closer to the worktable than the mounting surface. In the column, compared with the case where at least a part of the intersecting guide portion is not arranged on a side closer to the worktable than the mounting surface in a plan view, the position of the twisting rotation center of the column relative to the base is closer to the side of the worktable. At this time, the distance from the twisting rotation center to the tip of the tool becomes shorter. Therefore, the column can reduce the displacement caused by twisting during processing.

[0011] In the column of claim 2, the intersection guide portion includes a first intersection guide portion, and a second intersection guide portion arranged on the opposite side of the workbench than the first intersection guide portion, and in a plan view, the first intersection guide portion can be closer to the workbench than the mounting surface. The column is arranged so that the first intersection guide portion and the second intersection guide portion are on both sides of the mounting surface. Thus, the column can be guided more stably compared to a case where both the first intersection guide portion and the second intersection guide portion are arranged on a side closer to the workbench than the mounting surface. Therefore, the column can move stably in the intersection direction.

[0012] In the column of claim 3, the lower wall has a protrusion that protrudes toward one side of the workbench more than the mounting surface, the protrusion is supported from below by the first intersecting guide portion, and the upper end of the protrusion can be gradually tilted downward as it moves toward one side of the workbench. Since the upper end of the protrusion is gradually tilted downward as it moves toward one side of the workbench, the column can be supported without reducing rigidity. Therefore, the column can be stably moved in the intersecting direction.

[0013] The machine tool of claim 4 is characterized by comprising the column of claim 3. Therefore, the machine tool can obtain the same effect as that of claim 3.

[0014] In the machine tool of claim 5, the spindle can extend in the horizontal direction. In the case where the spindle extends in the horizontal direction, when twisting occurs, the twisting displacement of the tip of the tool becomes larger. The distance from the twisting rotation center of the machine tool to the tip of the tool becomes shorter. Therefore, even when the axial direction is in the horizontal direction, the displacement caused by twisting can be reduced during processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] [ Figure 1 ] is a three-dimensional view of the machine tool 1 (spindle head 6: raised).

[0016] [ Figure 2 ] is a three-dimensional view of the machine tool 1 (spindle head 6: descending).

[0017] [ Figure 3 ] is a right side view of the machine tool 1 (spindle head 6: raised).

[0018] [ Figure 4 ] is a right side view of the machine tool 1 (spindle head 6: lowered).

[0019] [ Figure 5 ] is a plan view of the machine tool 1.

[0020] [ Figure 6 ] is a three-dimensional diagram of column 5.

[0021] [ Figure 7] is a right side view of column 5.

[0022] [ Figure 8 ] is a plan view of column 5.

[0023] [ Fig. 9 ] is an explanatory diagram of the distortion of the columns 5 and 60 during the processing of the workpiece 99. DETAILED DESCRIPTION

[0024] The following describes an embodiment of the present invention. The following description uses left and right, front and back, and up and down as indicated by arrows in the figure. The left and right direction, up and down direction, and front and back direction of the machine tool 1 are the X-axis direction, Y-axis direction, and Z-axis direction of the machine tool 1, respectively. Figure 1 The machine tool 1 shown is a spindle 7 described later (see Figure 3 ) is a horizontal machine tool extending in the front-to-back direction (Z-axis direction), and the column 5 described later moves in the X-axis direction and the Z-axis direction.

[0025] Reference Figure 1 to Figure 5 , the structure of the machine tool 1 is described. Figure 1 , Figure 2 As shown, the machine tool 1 includes a base 2, a column 5, frame covers 10, 20, a spindle head 6, and a spindle 7 (see Figure 3 ), control box 8, rotary table 9, X-axis moving mechanism 11, Z-axis moving mechanism 12, Y-axis moving mechanism 13, etc. The base 2 is an iron base that is elongated in the Z-axis direction and is roughly rectangular. The X-axis moving mechanism 11 is arranged on the rear part of the upper surface of the base 2 and supports the moving body 15 movably in the X-axis direction. The Z-axis moving mechanism 12 is arranged on the upper surface of the moving body 15 and supports the column 5 movably in the Z-axis direction.

[0026] The column 5 extends in the up-down direction. The detailed structure of the column 5 will be described later. The frame cover 10 is installed on the upper part of the column 5. The frame cover 10 is a rectangular frame body in a plan view, and covers the column 5 from the outside. The frame cover 20 is installed on the front surface of the column 5. The frame cover 20 is a longitudinally long rectangular frame body in a front view, and covers the gap between the column 5 and the spindle head 6 described later from the outside. The upper surface of the frame cover 20 has a hole corresponding to the outer peripheral shape of the base 21 described later. The Y-axis moving mechanism 13 is arranged on the front surface of the column 5, and supports the spindle head 6 movably in the Y-axis direction.

[0027] The X-axis moving mechanism 11 includes a pair of guides, a ball screw, and an X-axis motor. The Z-axis moving mechanism 12 includes a pair of guides 25 (see Figure 5 ), ball screw, Z-axis motor. A pair of guide members 25 are in the shape of a track extending in the front-rear direction and are arranged at intervals from each other in the left-right direction. The Y-axis moving mechanism 13 includes a pair of guide members 24 (see Figure 6 )、ball screw 27 (see Figure 1), Y-axis motor. A pair of guide members 24 are in the shape of rails extending in the vertical direction, spaced apart from each other in the left-right direction, and are installed on the front side of the column 5 (see Figure 6 The X-axis moving mechanism 11, the Z-axis moving mechanism 12, and the Y-axis moving mechanism 13 move the target component (moving body 15, column 5, spindle head 6) along the guides by the power of each motor.

[0028] The frame cover 20 has a base 21 at its upper portion. The base 21 is roughly rectangular in plan view. The base 21 has a support hole 21A penetrating in the vertical direction on its upper surface. Figure 1 ) is inserted into and fixed in the support hole 21A. The rotating shaft of the Y-axis motor protrudes downward into the frame cover 20 and is connected to the ball screw 27 (see Figure 1 ) is connected to the upper end of the .

[0029] like Figures 1 to 4 As shown, the spindle head 6 extends in the Z-axis direction and is movably arranged in the Y-axis direction along the front surface of the column 5 through the Y-axis moving mechanism 13. The spindle head 6 has an upper cover 28 and a lower cover 85. The upper cover 28 is a metal plate that is roughly rectangular in front view. The lower end of the upper cover 28 is fixed to the rear end of the upper surface of the spindle head 6.

[0030] The upper cover 28 extends upward from the rear end of the upper surface of the spindle head 6. The upper cover 28 is arranged on the front side of the frame cover 20 and the base 21 (see Figure 3 , Figure 4 ). The upper cover 28 moves up and down integrally with the spindle head 6, thereby always covering the area of ​​the front surface of the column 5 that is higher than the spindle head 6 from the front. The lower cover 85 is fixed to the rear end of the lower surface of the spindle head 6 in a suspended state. The lower cover 85 is composed of a plurality of metal plates arranged in the vertical direction, and can be extended and retracted in the vertical direction according to the height of the spindle head 6, thereby always covering the area of ​​the front surface of the column 5 that is lower than the spindle head 6 from the front (see Figure 1 , Figure 2 ).

[0031] like Figure 3 , Figure 4 As shown, the spindle 7 is arranged in the spindle head 6 and extends in the Z-axis direction. The spindle head 6 rotatably supports the spindle 7. The rear part of the spindle head 6 holds a spindle motor (not shown). The output shaft of the spindle motor extends forward and is coaxially connected to the rear end of the spindle 7. The spindle 7 rotates around the Z-axis by the drive of the spindle motor. The tool holder 90 (see Figure 5 ) is detachably mounted on the spindle 7. The tool holder 90 holds the tool 91 at the front side.

[0032] The base 2 has a pair of support members 17, 18 at the rear (see Figure 5The support members 17 and 18 are spaced apart from each other in the left-right direction and extend upward to support the control box 8 from below. The control box 8 accommodates a control panel (not shown) inside. The control panel controls the operation of the machine tool 1.

[0033] The base 2 has a fixed table 16 on the front side of the upper surface. The fixed table 16 is arranged in front of the X-axis moving mechanism 11. The rotary table 9 is rotatably supported on the fixed table 16. The rotary table 9 is located in front of the spindle head 6. The rotary table 9 fixes the workpiece 99 (see Fig. 9 ), which can rotate 360° around a rotation axis parallel to the Y-axis.

[0034] Reference Figure 6 to Figure 8 , the structure of the column 5 is described. The column 5 is a rectangular tube in a vertically long rectangular shape when viewed from the front. The column 5 has a right wall 51A, a left wall 51B, an upper wall 51C and a lower wall 51D. The column 5 has a through-hole 5A surrounded by the right wall 51A, the left wall 51B, the upper wall 51C and the lower wall 51D. The through-hole 5A is in a vertically long rectangular shape when viewed from the front.

[0035] The right wall 51A has a mounting surface 52R and a mounting surface 54R. The mounting surface 52R is arranged at the left front end of the right wall 51A. The mounting surface 54R is arranged at the right front end of the right wall 51A and is located on the right side of the mounting surface 52R. The mounting surface 54R is arranged at a position further back than the mounting surface 52R (see Figure 8 The mounting surfaces 52R and 54R are in a longitudinally long rectangular shape when viewed from the front.

[0036] The mounting surface 52R is formed with a plurality of screw holes 52A arranged in the vertical direction. By screwing screws into the screw holes 52A, one of the pair of guides 24 is mounted on the mounting surface 52R. The mounting surface 54R is formed with a plurality of screw holes 54A arranged in the vertical direction. By screwing screws into the screw holes 54A, the frame cover 20 is mounted on the mounting surface 54R.

[0037] The mounting surface 52L is arranged at the right front end of the left wall 51B. The mounting surface 52R and the mounting surface 52L are arranged at the same position in the front-rear direction. The mounting surface 54L is arranged at a position further back than the mounting surface 52L (see Figure 8 The mounting surface 54L is arranged at the left front end of the left wall 51B and is located on the left side of the mounting surface 52L. The mounting surface 54L is arranged at a position further back than the mounting surface 52L (see Figure 8 ). The mounting surface 54R and the mounting surface 54L are arranged at the same position in the front-rear direction. The mounting surfaces 52L and 54L are in a longitudinally long rectangular shape when viewed from the front.

[0038] The mounting surface 52L is formed with a plurality of screw holes 52B arranged in the vertical direction. The other of the pair of guide members 24 is mounted on the mounting surface 52L by screwing screws into the screw holes 52B. The mounting surface 54L is formed with a plurality of screw holes (not shown) arranged in the vertical direction. The frame cover 20 is mounted on the mounting surface 54L by screwing screws into the screw holes.

[0039] The mounting surfaces 53R and 53L are arranged on the upper wall 51C. The mounting surface 53R is arranged on the upper left side of the mounting surface 52R. The mounting surface 53L is arranged on the upper right side of the mounting surface 52L. Figure 8 As shown, the mounting surface 53R is arranged at a position further back than the mounting surface 52R, and the mounting surface 53L is arranged at a position further back than the mounting surface 52L. The mounting surface 53R and the mounting surface 53L are arranged at the same position in the front-to-back direction. The mounting surface 53R and the mounting surface 53L are in a longitudinally long rectangular shape when viewed from the front. The mounting surface 53R has a plurality of screw holes 53A. The mounting surface 53L has a plurality of screw holes 53B. By screwing the screws into the screw holes 53A, the base 21 is mounted on the mounting surface 53R. By screwing the screws into the screw holes 53B, the base 21 is mounted on the mounting surface 53L.

[0040] The front end of the lower wall 51D has a protrusion 55. The protrusion 55 protrudes forward further than the mounting surfaces 52R and 52L. The upper surface 55A of the protrusion 55 gradually inclines downward as it moves forward. The frame cover 20 and the lower cover 85 are arranged on the upper side of the upper surface 55A (see Figures 1 to 4 ).

[0041] The movable body 56 includes a plate member 56A and sliding members 57R, 57L, 58R, and 58L. The plate member 56A is disposed at the lower end of the column 5 .

[0042] The sliding members 57R and 57L are arranged at the front end of the plate member 56A. The sliding member 57R is arranged at the right front end of the plate member 56A. The sliding member 57L is arranged at the left front end of the plate member 56A. The sliding members 57R and 57L are arranged at the same position in the front-rear direction. In a plan view, a part of the sliding members 57R and 57L is located further forward than the mounting surfaces 52R and 52L (see FIG. 2 ). Figure 8 The sliding members 57R and 57L are boxes having a rectangular shape when viewed from the bottom. The sliding member 57R can slide in the front-rear direction under the guidance of the right guide member 25 of the pair of guide members 25 (see Figure 5 The slide member 57L is guided by the left guide member 25 of the pair of guide members 25 so as to slide in the front-rear direction (see Figure 5). Hereinafter, when the sliding members 57R and 57L are not distinguished, they are collectively referred to as the sliding member 57. In a plan view, the sliding members 57R and 57L only need to be at least partially located forward of the mounting surfaces 52R and 52L. Figure 8 That way it's all in the front.

[0043] Sliding members 58R, 58L (see Figure 8 ) is arranged at the rear end of the plate member 56A. The sliding member 58R is arranged at the right rear end of the plate member 56A. The sliding member 58L is arranged at the left rear end of the plate member 56A. The sliding members 58R and 58L are arranged at the same position in the front-to-back direction. In a plan view, the sliding members 58R and 58L are located further rearward than the mounting surfaces 52R and 52L (see Figure 8 The sliding members 58R and 58L are boxes having a rectangular shape when viewed from the bottom. The sliding member 58R can slide in the front-rear direction under the guidance of the right guide member 25 of the pair of guide members 25 (see Figure 5 The slide member 58L is guided by the left guide member 25 of the pair of guide members 25 so as to slide in the front-rear direction (see Figure 5 ). Hereinafter, when the sliding members 58R and 58L are not distinguished, they are collectively referred to as the sliding member 58.

[0044] Reference Figure 1 to Figure 5 , Fig. 9 , the operation of the machine tool 1 during the machining of the workpiece 99 is described. After the CPU of the control panel reads the Z-axis feed instruction in the NC program, it drives the motor of the Z-axis moving mechanism 12. The sliding members 57 and 58 slide forward under the guidance of the pair of guides 25. The spindle 7 moves forward on the Z-axis to a position on the rotary table 9 close to the workpiece 99 and the tool 91.

[0045] The CPU drives the spindle motor to rotate the spindle 7. In this state, the CPU drives the motors of the X-axis moving mechanism 11, the Z-axis moving mechanism 12, and the Y-axis moving mechanism 13 based on the instructions of the NC program to move the spindle 7 relative to the workpiece 99, thereby processing the workpiece 99.

[0046] When the spindle 7 moves in the vertical direction through the Y-axis moving mechanism 13, the lower cover 85 is extended and retracted in the vertical direction according to the height of the spindle head 6. When the spindle 7 is located at the lower end of the vertical movement range (see Figure 2 , Figure 4), the multiple metal plates of the lower cover 85 overlap in a state of gradually tilting downward from the lower end of the spindle head 6 toward the front. In the protrusion 55 located on the lower side of the lower cover 85, the upper surface 55A gradually tilts downward toward the front. Therefore, when the spindle 7 moves in the vertical direction through the Y-axis moving mechanism 13, the protrusion 55 does not interfere with the extension and contraction of the lower cover 85 in the vertical direction.

[0047] like Fig. 9 As shown in (a), the sliding member 57 is arranged below the protruding portion 55 , and a part of the sliding member 57 is arranged in front of the mounting surface 52 . Fig. 9 The column 60 shown in (b) is a comparative column having a conventional structure. The column 60 includes a mounting surface 72R, a movable body 76, a spindle head 6, and a frame cover 20. The movable body 76 includes sliding components 77 (77R, 77L), 78 (78R, 78L). The mounting surface 72R, the movable body 76, the sliding components 77 (77R, 77L), 78 (78R, 78L) correspond to the mounting surface 52R, the movable body 56, the sliding components 57 (57R, 57L), 58 (58R, 58L) of the column 5 of the present invention, respectively. The column 60 differs from the column 5 of the present invention in that it does not include the protrusion 55 of the present invention, and the sliding component 77 is disposed as a whole at a position further rearward than the mounting surface 72R.

[0048] like Fig. 9 As shown in (a), in the column 5, the intersection of the imaginary line connecting the sliding parts 57R and 58L and the imaginary line connecting the sliding parts 57L and 58R is set to Q1. Fig. 9 As shown in (b), in the column 60, the intersection of the imaginary line connecting the slide members 77R and 78L is Q2. The distance L1 between the intersection Q1 and the tip of the cutter 91 is shorter than the distance L2 between the intersection Q2 and the tip of the cutter 91.

[0049] Here, when the machine tool 1 processes the workpiece 99, the columns 5 and 60 may be twisted in the horizontal direction relative to the base 2 due to the reaction force from the workpiece 99. Since the columns 5 and 60 are twisted in the horizontal direction, the tool 91 is also twisted in the horizontal direction. When the entire columns 5 and 60 are twisted in the horizontal direction, the rotation center of the twist becomes the intersection points Q1 and Q2 defined by the positional relationship of the sliding parts 57, 58, 77, and 78. The displacement of the tool 91 caused by the twisting decreases as the distance L1 and L2 between the intersection points Q1 and Q2 and the front end of the tool 91 is shortened. Since the distance L1 is shorter than the distance L2, the displacement of the tool 91 in the column 5 due to the twisting is smaller than the displacement of the tool 91 in the column 60 due to the twisting.

[0050] As described above, in the machine tool 1, the spindle head 6 extends in the Z-axis direction and is arranged on the front surface of the column 5 through the Y-axis moving mechanism 13. The rotary table 9 is located in front of the spindle head 6. The spindle head 6 can move in the Y-axis direction (up and down direction) by being guided by a pair of guide members 24 installed on the mounting surfaces 52R and 52L of the column 5. The mounting surface 52R is arranged at the left front end of the right wall 51A. The mounting surface 52L is arranged at the right front end of the left wall 51B. The column 5 can move in the Z-axis direction (front and back direction) under the guidance of the pair of guide members 25 through the sliding members 57 and 58. In a plan view, a part of the sliding member 57 is located at a position further forward than the mounting surface 52. The distance L1 between the intersection Q1 in the column 5 and the front end of the tool 91 is shorter than the distance L2 between the intersection Q2 in the column 60 of the conventional structure and the front end of the tool 91. The displacement of the tool 91 due to twisting decreases as the distances L1 and L2 between the intersection points Q1 and Q2, which are the twisting rotation centers, and the front end of the tool 91 are shortened. Since the distance L1 is shorter than the distance L2, the displacement of the tool 91 due to twisting in the column 5 is smaller than the displacement of the tool 91 due to twisting in the column 60 of the conventional structure. Therefore, the column 5 can reduce the displacement due to twisting when processing the workpiece 99.

[0051] In a plan view, a portion of the sliding member 57 is located in front of the mounting surfaces 52R and 52L. In a plan view, the sliding member 58 is located in the rear of the mounting surfaces 52R and 52L. The sliding member 57 and the sliding member 58 are arranged with the mounting surfaces 52R and 52L sandwiched between them in the front-to-back direction in a plan view. In this way, the column 5 can be guided more stably than in a case where both the sliding members 57 and 58 are arranged in front of the mounting surfaces 52R and 52L. Therefore, the column 5 can be stably moved in the front-to-back direction.

[0052] The protrusion 55 is located further forward than the mounting surface 52. The upper surface 55A of the protrusion 55 gradually tilts downward as it moves forward. The lower cover 85 is arranged on the upper side of the upper surface 55A. When the spindle 7 is located at the lower end of the moving range in the up-down direction, the multiple metal plates of the lower cover 85 overlap in a state of gradually tilting downward from the lower end of the spindle head 6 as it moves forward. Since the upper surface 55A of the protrusion 55 gradually tilts downward as it moves forward, when the spindle 7 moves in the up-down direction through the Y-axis moving mechanism 13, the protrusion 55 does not interfere with the extension and contraction of the lower cover 85 in the up-down direction. Since the upper surface 55A of the protrusion 55 gradually tilts downward as it moves forward, the column 5 can be supported without reducing the rigidity. Therefore, the column 5 can move stably in the front-back direction.

[0053] The spindle 7 extends in the Z-axis direction (front-back direction). When the spindle 7 extends in the horizontal direction, if the column 5 is twisted in the horizontal direction, the tool 91 extending coaxially with the spindle 7 will also be twisted in the horizontal direction. Therefore, the twisting displacement at the front end of the tool 91 is likely to become larger. When the entire column 5, 60 is twisted in the horizontal direction, the rotation center of the twist becomes the intersection Q1, Q2 defined by the positional relationship of the sliding parts 57, 58, 77, 78. The displacement of the tool 91 caused by the twisting decreases as the distance L1, L2 between the intersection Q1, Q2 and the front end of the tool 91 is shortened. Since the distance L1 is shorter than the distance L2, the displacement of the tool 91 in the column 5 due to the twisting is smaller than the displacement of the tool 91 in the column 60 of the conventional structure due to the twisting. Therefore, even when the spindle 7 is extended in the horizontal direction, the machine tool 1 can reduce the displacement caused by the twisting when processing the workpiece 99.

[0054] In the above-mentioned embodiment, the base 2 is an example of the base of the present invention. The workpiece 99 is an example of a material to be cut. The rotary table 9 is an example of a table of the present invention. The guide 24 is an example of an upper and lower guide portion of the present invention. The Z-axis direction (front-back direction) is an example of an intersecting direction of the present invention. The sliding components 57 and 58 are examples of intersecting guide portions of the present invention. The sliding component 57 is an example of a first intersecting guide portion of the present invention. The sliding component 58 is an example of a second intersecting guide portion of the present invention.

[0055] The present invention is not limited to the above-mentioned embodiment, and various modifications are possible. The various modifications described below can be combined with each other within the scope that no contradiction occurs. For example, the machine tool 1 of the above-mentioned embodiment of the present invention is a horizontal machine tool in which the spindle 7 extends in the horizontal direction, but it can also be applied to a vertical machine tool in which the spindle extends in the vertical direction.

[0056] In the column 5, the positional relationship between the sliding components 57, 58 and the mounting surfaces 52R, 52L can be changed as follows. As long as at least a portion of the sliding components 57R, 57L is arranged at a position further forward than the mounting surfaces 52R, 52L, a portion of the sliding components 57R, 57L can also be arranged at a position further rearward than the mounting surfaces 52R, 52L. Both the sliding components 57, 58 can be arranged at a position further forward than the mounting surfaces 52R, 52L. In this case, as long as the sliding components 57, 58 are arranged at a position further rearward than the rotary table 9. The sliding component 58 can be arranged in the central part of the front-to-back direction of the plate component 56A. In this case, the intersection Q1 will be closer to the front end of the tool 91, and the distance L1 will become shorter. Therefore, the column 5 can further reduce the displacement of the tool 91 caused by twisting.

[0057] The upper surface 55A of the protrusion 55 does not necessarily need to be inclined forward and downward. For example, the upper surface 55A may be a horizontal surface.

[0058] The sliding members 57 and 58 may be configured to move along the pair of guides 25 . For example, rollers that roll on the pair of guides 25 may be used instead of the sliding members 57 and 58 .

[0059] The rotating table 9 can move in at least one of the X-axis direction, the Y-axis direction, and the Z-axis direction. The rotating table 9 can also rotate around the X-axis.

[0060] Explanation of symbols

[0061] 1: Machine tools

[0062] 5: Column

[0063] 7: Spindle

[0064] 52R, 52L: Mounting surface

[0065] 55: Protrusion

[0066] 56: Mobile

[0067] 57, 58: Sliding parts (intersecting guides)

Claims

1. A column, which is arranged at a distance from a workbench for fixing a material to be cut on the upper side of a base of a machine tool and supports a spindle head for holding a spindle, the column being characterized in that it comprises: A mounting surface, arranged on a surface opposite to the worktable, for mounting a vertical guide portion for guiding the spindle head to move in a vertical direction; as well as An intersection guide portion is arranged on the lower wall to guide the movement of the column in an intersection direction intersecting with the up-down direction, and In a plan view, at least a portion of the intersection guide portion is closer to the workbench than the mounting surface.

2. The column according to claim 1, characterized in that: The intersecting guide portion includes a first intersecting guide portion and a second intersecting guide portion disposed on an opposite side of the workbench than the first intersecting guide portion. In the plane view, The first intersection guide portion is closer to the workbench than the mounting surface.

3. The column according to claim 2, characterized in that: The lower wall has a protrusion that protrudes toward one side of the workbench more than the mounting surface. The protruding portion is supported by the first intersecting guide portion from below, and an upper end thereof gradually inclines downward as it moves toward one side of the workbench.

4. A machine tool, characterized in that: Comprising the column as described in claim 3.

5. The machine tool according to claim 4, characterized in that: The main axis extends in a horizontal direction.

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