JP2016185580A - Machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine tool in which angular deviation of a rail mounting surface can be corrected easily.SOLUTION: A table device of the machine tool includes a translation stage 30. The translation stage 30 supports a table for holding a workpiece so that the table can move in an X axis direction. The translation stage 30 includes: a front rail support portion 32 and a rear rail support portion 33. The front rail support portion 32 and the rear rail support portion 33 support a pair of X axis rails. The pair of X axis rails guide the table in the X axis direction. The front rail support portion 32 has grooves 41-43 extended parallel to the X axis direction. Spacers 51, 52 and an intermediate spacer 53 are inserted into the grooves 41-43 respectively and fixed. When there is large angular deviation at the front rail support portion 32 of the machine tool, the angular deviation occurring at the front rail support portion 32 can be corrected easily just by replacing the spacers 51, 52 and the intermediate spacer 53 in the grooves 41-43 with the spacers having different thicknesses.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a machine tool.

  The machine tool described in Patent Document 1 includes a workbench mechanism. The work table mechanism supports the work table so as to be movable in the X-axis direction and the Y-axis direction. The workbench mechanism includes a base, a carrier, and a workbench. The workbench fixes the workpiece on the top surface. The base has a pair of Y-axis guide rails on the upper surface. The Y-axis guide rail guides the carrier in the Y-axis direction. The carrier includes a pair of X-axis guide rails on the upper surface. The X-axis guide rail guides the work table in the X-axis direction. The work table moves in the Y-axis direction via the carrier. Therefore, the work table is movable in the X-axis direction and the Y-axis direction. The Y-axis guide rail is attached to a rail attachment surface provided on the upper surface of the base. The X-axis guide rail is attached to a rail attachment surface provided on the upper surface of the carrier. One standard for the straightness of the rail mounting surface is pitching (based on JIS_B — 6191-1993). Pitching is the amount of deviation in posture during movement of a moving part that should move straight, and is an angular deviation that occurs when the moving part moves straight forward.Positioning is performed sequentially in one direction from the reference position. This is the maximum value of the vertical displacement angle with respect to the reference position. Pitching greatly depends on the accuracy of the rail mounting surface.

JP 2014-26478 A

  Even if the processing accuracy of the rail mounting surface is adjusted by grinding, etc., the straightness of the rail mounting surface changes when the components are assembled together due to tolerance variations of other components, so the angle deviation is not stable. There was a problem. The workbench mechanism arranges a pair of X-axis rails in a direction orthogonal to each other on the pair of Y-axis rails. Therefore, since the straightness of the rail mounting surface of the X-axis rail greatly changes in the vertical direction with respect to the movement of a heavy object such as a work table, a lot of man-hours are required especially for correcting the pitching.

  An object of the present invention is to provide a machine tool that can easily correct an angular deviation of a rail mounting surface.

  A machine tool according to claim 1 of the present invention is a machine tool for cutting a workpiece with a tool, and a moving table that supports the moving object in a movable manner, and both ends of the moving table in the moving direction in which the moving object moves. A rail support part that supports a rail that guides the moving object in the movement direction, and a groove that is provided in the rail support part and extends in a direction parallel or perpendicular to the movement direction. And a plate-like spacer that is detachably inserted into the groove, and a fixing means that fixes the spacer to the groove. When the angular deviation of the rail support part is large, the machine tool can easily correct the angular deviation generated in the rail support part simply by replacing spacers having different thicknesses in the grooves.

  A machine tool according to claim 2 is provided with the screw hole provided in the rail support portion and communicating with the groove in a direction perpendicular to the moving direction, in addition to the configuration of the invention according to claim 1, and the screw hole On the other hand, a screw threaded from the opposite side to the groove side, and a screw that can move forward and backward toward the inside of the groove, and the spacer is a shaft portion of the screw that protrudes from the screw hole inside the groove Is inserted into the groove, and the tip of the shaft portion is in contact with the inner surface of the groove facing the screw hole. When inserting the spacer into the groove, the operator rotates the screw in one direction with a tool. The shaft portion of the screw can push the inner surface of the groove to widen the groove width. Therefore, the operator can easily insert the spacer into the expanded groove.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the invention, the rail support portion extends in the moving direction and includes a mounting surface for mounting the rail, and the groove includes the mounting It extends in the direction parallel or orthogonal to the surface. Therefore, the machine tool can easily correct the pitching or yawing of the mounting surface.

  According to a fourth aspect of the present invention, in addition to the structure of the third aspect of the present invention, the groove is provided at least at both ends of the rail support portion in the moving direction and extends in parallel to the mounting surface. It is characterized by providing. The machine tool can easily correct the pitching of the mounting surface by changing the thicknesses of the spacers inserted into the respective grooves provided at both ends of the rail support portion.

  According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect of the invention, the rail support portions are arranged in parallel to each other, and a first rail support portion and a second rail that respectively support the pair of rails. A support portion is provided, and the groove is provided at both ends of the first rail support portion and the second rail support portion. A machine tool that supports a moving object so as to be movable by a pair of rails can easily correct the pitching of the mounting surfaces of the first rail support portion and the second rail support portion. Furthermore, since the machine tool can correct the pitching of the respective mounting surfaces, the positional relationship between the mounting surfaces can be easily corrected.

  According to a sixth aspect of the present invention, in addition to the configuration of the fifth aspect of the invention, the groove includes a first groove provided at one end of the first rail support portion, and the first rail support portion. A second groove provided at the other end opposite to the one end, a third groove provided at one end of the second rail support and located on the same side as the first groove, and the second rail support Provided on the other end of the portion opposite to the one end, and provided with a fourth groove located on the same side as the second groove, the spacer being inserted into the first groove, A second spacer to be inserted into the second groove; a third spacer to be inserted into the third groove; and a fourth spacer to be inserted into the fourth groove, each plate of the first spacer and the fourth spacer. The thickness is the same first plate thickness, and the plate thickness of each of the second spacer and the third spacer is the same second plate thickness, It said second thickness and IchiitaAtsu is characterized different. Therefore, the machine tool can deform the mounting surfaces of the first rail support portion and the second rail support portion in directions that can be twisted with each other, so that the rolling of the two mounting surfaces can be easily corrected.

1 is a perspective view of a machine tool 1. The perspective view of the movement stand 30. FIG. The top view of the movement stand 30. FIG. FIG. 4 is a cross-sectional view taken along the line I-I in FIG. 3. The elements on larger scale of the W1 area | region shown in FIG. The elements on larger scale of the W2 area | region shown in FIG. The elements on larger scale of the W3 area | region shown in FIG. The elements on larger scale of the W4 area | region shown in FIG. The top view of the spacer 51. FIG. II-II arrow direction sectional drawing shown in FIG. The top view of the intermediate spacer 53. FIG. The rear view of the intermediate spacer 53. FIG.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, left, right, front, back, and top and bottom indicated by arrows in the figure are used. The left-right direction, the front-rear direction, and the vertical direction of the machine tool 1 are an X-axis direction, a Y-axis direction, and a Z-axis direction, respectively. A machine tool 1 shown in FIG. 1 is a machine that rotates a tool (not shown) mounted on a spindle (not shown) at high speed and performs cutting on a workpiece (not shown) held on the upper surface of the table 11.

  The structure of the machine tool 1 will be briefly described with reference to FIG. The machine tool 1 includes a base 2, a column 5, a spindle head 6, a spindle (not shown), a table device 7, a control box 8, and the like. The base 2 is a substantially rectangular parallelepiped base made of metal. The column 5 is a prism that is erected on the upper rear side of the base 2. The spindle head 6 is provided so as to be movable in the Z-axis direction along the front surface of the column 5. The spindle head 6 supports the spindle in a rotatable manner. The spindle has a mounting hole (not shown) at the bottom of the spindle head 6. The spindle is rotated by driving the spindle motor 9 with a tool mounted in the mounting hole. The spindle motor 9 is provided on the spindle head 6. The spindle head 6 moves in the Z-axis direction by a Z-axis moving mechanism (not shown) provided on the front surface of the column 5. The table device 7 is provided in front of the upper surface of the base 2 and supports the table 11 so as to be movable in the X axis direction and the Y axis direction. The table 11 holds a workpiece (not shown) on the upper surface with a jig or the like. The control box 8 is provided on the back surface of the column 5 and stores a numerical control device (not shown) for controlling the operation of the machine tool 1.

  The structure of the table device 7 will be described with reference to FIG. The table device 7 includes a base 12, a Y-axis moving mechanism (not shown), a moving table 30, an X-axis moving mechanism 21, a table 11, and the like. The base 12 is provided on the front side of the upper surface of the base 2 and is formed in a substantially rectangular plate shape in plan view extending in the Y-axis direction. The Y-axis moving mechanism is provided on the upper surface of the base 12 and includes a pair of Y-axis rails, a Y-axis ball screw, a Y-axis motor (not shown), and the like. The pair of Y-axis rails are provided in parallel to each other in the Y-axis direction along both left and right ends of the upper surface of the base 12, and guide the moving table 30 on the base 12 in the Y-axis direction. The Y-axis ball screw is disposed between the pair of Y-axis rails and extends in the Y-axis direction. The Y-axis motor rotates the Y-axis ball screw. The moving table 30 described later is formed in a substantially rectangular parallelepiped shape extending in the left-right direction, and includes a nut (not shown) at the bottom. The nut is screwed with the Y-axis ball screw. When the Y-axis motor rotates the Y-axis ball screw, the moving table 30 moves in the Y-axis direction along with a pair of Y-axis rails together with the nut.

  The movable table 30 includes a Y-axis cover 15 on the front side. The Y-axis cover 15 covers the Y-axis moving mechanism exposed on the front side of the moving table 30, and prevents chips from adhering and accumulating in the Y-axis moving mechanism. The Y-axis cover 15 expands and contracts as the moving base 30 moves in the Y-axis direction. The movable table 30 includes a Y-axis rear cover (not shown) between the rear surface and the lower front surface of the column 5. The Y-axis rear cover covers the Y-axis moving mechanism exposed on the rear side of the moving table 30, and prevents chips from adhering and accumulating in the Y-axis moving mechanism. The right end of the movable table 30 protrudes further to the right side than the right end of the base 12. The left end of the movable table 30 protrudes further to the left than the left end of the base 12. There is nothing that supports both ends of the movable table 30 from directly below.

  The X-axis moving mechanism 21 is provided on the upper surface of the moving table 30 and includes a pair of X-axis rails 22 and 23, an X-axis ball screw 24, an X-axis motor 28 (see FIG. 2), and the like. The X-axis rails 22 and 23 are provided in parallel with each other along both front and rear ends of the upper surface of the moving table 30, and guide the table 11 in the X-axis direction above the moving table 30. The X-axis ball screw 24 is disposed between the X-axis rails 22 and 23 and extends in the X-axis direction. The X-axis motor 28 drives the X-axis ball screw 24 to rotate. The table 11 is formed in a rectangular plate shape in plan view and includes a nut (not shown) at the bottom. The nut is engaged with the X-axis ball screw 24. When the X-axis motor 28 rotates the X-axis ball screw 24, the table 11 moves in the X-axis direction along the X-axis rails 22 and 23 together with the nuts. Therefore, the table device 7 can move the table 11 in the X-axis direction and the Y-axis direction.

  The movable table 30 includes X-axis covers (not shown) on both the left and right sides. Each X-axis cover covers the X-axis moving mechanism exposed on both the left and right sides of the moving table 30, and prevents chips from adhering and accumulating in the X-axis moving mechanism. The X-axis cover expands and contracts as the moving base 30 moves in the X-axis direction.

  The structure of the movable table 30 will be described with reference to FIGS. As shown in FIGS. 2 and 3, the movable table 30 extends in the X-axis direction and is formed in a substantially H shape in a side view. The movable table 30 includes a main body portion 31, a front rail support portion 32, and a rear rail support portion 33. The main body 31 is formed in a substantially rectangular plate shape in plan view extending in the left-right direction. The front rail support portion 32 is provided along the front end portion of the main body portion 31 and is formed in a wall shape protruding in the vertical direction. The rear rail support portion 33 is provided along the rear end portion of the main body portion 31 and is formed in a wall shape protruding in the vertical direction.

  The upper surface structure of the main body 31 will be described. As shown in FIGS. 2 and 3, the main body 31 is provided with a pair of support bases 34 on the upper left end side. The pair of support bases 34 are spaced apart from each other in the front-rear direction, and support the bearings 26 (see FIG. 1) over the respective upper surfaces. The bearing 26 rotatably supports the left end portion of the X-axis ball screw 24. The main body 31 is provided with a pair of support bases 35 on the upper right end side. The pair of support bases 35 are spaced apart from each other in the front-rear direction, and support the X-axis motor 28 (see FIG. 1) over the respective upper surfaces. An output shaft (not shown) of the X-axis motor 28 extends to the left and is connected to the right end of the X-axis ball screw 24. Therefore, the X-axis motor 28 can drive the X-axis ball screw 24 to rotate.

  The structure of the front rail support portion 32 will be described. As shown in FIGS. 2 to 4, the front rail support portion 32 includes a rail mounting surface 37, grooves 41 to 43, and hollow portions 61 to 63 (see FIG. 4). The rail attachment surface 37 is a surface that extends substantially horizontally in the left-right direction along the upper portion of the front rail support portion 32 and attaches the X-axis rail 22. The rail mounting surface 37 is provided with a plurality of screw holes 371 at equal intervals along the length direction. The rail mounting surface 37 includes a rib 37A that protrudes upward along the rear end portion. The X-axis rail 22 is disposed along the rail mounting surface 37, and the back surface of the X-axis rail 22 is positioned in contact with the front surface of the rib 37A. The X-axis rail 22 includes a plurality of fixed holes 311 (see FIG. 1) at equal intervals along the length direction. The fixing hole 311 penetrates the X-axis rail 22 in the vertical direction. The plurality of fixing holes 311 of the X-axis rail 22 are disposed so as to face the plurality of screw holes 371 provided in the rail mounting surface 37 and fastened by screws (not shown). Therefore, the X-axis rail 22 is fixed to the rail mounting surface 37.

  The groove 41 is provided in the upper part of the right end portion of the front rail support portion 32. The groove 41 is formed in a cut shape so as to extend leftward from the right end surface 321 of the front rail support portion 32 and to be parallel to the rail mounting surface 37. In the groove 41, a flat spacer 51 is inserted and fixed inside (see FIG. 5). The groove 42 is provided in the upper portion of the left end portion of the front rail support portion 32. The groove 42 is formed in a cut shape so as to be directed rightward from the left end surface 322 of the front rail support portion 32 and to be parallel to the rail mounting surface 37. The flat plate spacer 52 is inserted and fixed in the groove 42 inside. The groove 43 is provided in the upper part of the center portion of the front rail support portion 32. The groove 43 is formed in a cut shape so as to extend parallel to the rail mounting surface 37 and penetrates the front surface and the back surface of the front rail support portion 32. In the groove 43, a flat intermediate spacer 53 is inserted and fixed inside (see FIG. 6). The groove width (height of the groove) of the grooves 41 to 43 of this embodiment is, for example, 3 mm to 5 mm.

  As shown in FIG. 4, the hollow portion 61 is provided on the lower right side of the back surface of the front rail support portion 32 and opens toward the main body portion 31 side. The cavity 61 is disposed below the groove 41. The cavity 62 is provided on the lower left side of the back surface of the front rail support portion 32 and opens toward the main body 31 side. The cavity 62 is disposed below the groove 42. The hollow portion 63 is provided at a substantially lower center of the back surface of the front rail support portion 32 and opens toward the main body portion 31 side. The cavity 63 is partitioned by partitions 66 and 67, and is partitioned into a first cavity 63A, a second cavity 63B, and a third cavity 63C in order from the right. The second cavity portion 63 </ b> B is disposed at the center of the cavity portion 63 and is disposed below the groove 43. As will be described later, the hollow portions 61 to 63 function as weight reduction of the base 2, and the spacers 51 and 52 and the intermediate spacer 53 are inserted into the grooves 41 to 43 and fixed with the second bolts 81 to 84. It can be used as a work space.

  As shown in FIG. 7, the front rail support portion 32 is provided with a screw hole 323 between the rail mounting surface 37 and the groove 41, and an insertion hole 324 and a screw hole 325 are communicated between the groove 41 and the cavity portion 61. Provide. The screw hole 325 is disposed on the left side of the insertion hole 324. That is, the screw hole 325 is disposed downstream of the insertion hole 324 in the insertion direction of the spacer 51. The insertion direction of the spacer 51 is a direction from right to left. The screw hole 323 and the insertion hole 324 face each other through the groove 41. The first bolt 71 is fastened to the screw hole 325 from the cavity portion 61 side, and the tip portion abuts on the upper inner surface of the groove 41.

  Although not shown, the front rail support portion 32 includes the screw hole 323, the insertion hole 324, and the screw hole between the rail mounting surface 37 and the groove 42 (see FIG. 4) and between the groove 42 and the cavity portion 62. Two screw holes similar to 325 and one fixing hole are provided. The first bolt 72 (see FIG. 4) is fastened to one screw hole, and the tip part abuts on the upper inner surface of the groove 42.

  As shown in FIG. 8, the front rail support portion 32 is provided with a pair of screw holes 326 and 327 between the rail attachment surface 37 and the groove 43. The screw holes 326 and 327 are separated in the left-right direction. The front rail support portion 32 is provided with a pair of insertion holes 328 and 329 and a pair of screw holes 331 and 332 in communication between the groove 43 and the second cavity portion 63B. The insertion holes 328 and 329 are opposed to each other through the screw holes 326 and 327 and the groove 43. The screw holes 331 and 332 are arranged on both the left and right sides so as to sandwich the insertion holes 328 and 329 at the center. The first bolts 73 and 74 are fastened to the screw holes 331 and 332 from the second cavity 63B side, and the respective tip portions abut against the upper inner surface of the groove 43.

  The structure of the rear rail support part 33 will be described. Since the rear rail support part 33 has the front and rear rail support part 32 and the front-rear object shape, it will be briefly described. As shown in FIG. 2, the rear rail support portion 33 includes a rail mounting surface 38, grooves 45 to 47, and three hollow portions (not shown). The rail attachment surface 38 is a surface that extends substantially horizontally in the left-right direction along the upper portion of the rear rail support portion 33 and attaches the X-axis rail 23. The rail mounting surface 38 includes a rib 38A that protrudes upward along the front end portion. The X-axis rail 23 is disposed along the rail mounting surface 38, and the front surface of the X-axis rail 23 is in contact with the back surface of the rib 38A for positioning. The X-axis rail 23 is fixed to the rail mounting surface 38 with screws (not shown) in the same manner as the X-axis rail 22 is fixed.

  Similarly to the groove 41, the groove 45 is provided at the upper part of the right end portion of the rear rail support portion 33. The groove 46 is provided in the upper portion of the left end portion of the rear rail support portion 33 in the same manner as the groove 42. Similarly to the groove 43, the groove 47 is provided in the upper part of the central part of the rear rail support part 33. The groove 45 inserts and fixes a flat spacer 55 inside. The flat plate spacer 56 is inserted and fixed in the groove 46 inside. The groove 47 inserts and fixes a flat intermediate spacer 57 inside. The three cavities are provided at the same position and in the same shape as the cavities 61 to 63 of the front rail support 32 at the lower part of the front surface of the front rail support 32. As with the front rail support portion 32, the rear rail support portion 33 is provided with screw holes (not shown) between the rail mounting surface 38 and the grooves 41 to 43, and between the grooves 45 to 47 and the three hollow portions. Are provided with screw holes and fixing holes (not shown).

  The shape of the spacer 51 will be described with reference to FIGS. The spacer 51 is a metal plate having a substantially rectangular shape in plan view. The spacer 51 has a longitudinal length L1 that is substantially the same as the longitudinal length P1 of the groove 41 and a lateral length that is shorter than the lateral length P2 of the groove 41. L2. As the material of the spacer 51, for example, a steel material such as SS400 or S45C can be applied. The spacer 51 includes an insertion groove 51A and an insertion hole 51B. The insertion groove 51 </ b> A is formed to be recessed in a substantially arc shape from the substantially central portion in the length direction of the one end portion 511 of the spacer 51 toward the other end portion 512 on the opposite side. The insertion hole 51B is a round hole provided at a substantially central portion of the spacer 51, and is adjacent to the right side of the bottom of the insertion groove 51A. Since the spacers 52, 55, and 56 have the same shape as the spacer 51, description thereof is omitted.

  The shape of the intermediate spacer 53 will be described with reference to FIGS. The intermediate spacer 53 is a substantially rectangular metal plate that is horizontally long in plan view, and has a longitudinal length L3 that is substantially the same as the length of the groove 43 in the front-rear direction and a lateral length that is shorter than the length P3 of the groove 43 in the left-right direction. L4. The length of the groove 43 in the front-rear direction is substantially the same as the length P1 of the groove 41 in the front-rear direction. As the material of the intermediate spacer 53, for example, a steel material such as SS400 or S45C can be applied. The intermediate spacer 53 includes two insertion grooves 53A and 53B. The insertion groove 53A is formed to be recessed in a substantially rectangular shape from the right side of the one end portion 531 of the intermediate spacer 53 toward the other end portion 532 opposite to the one end portion. The insertion groove 53B is formed to be recessed in a substantially rectangular shape from the left side of the one end portion 531 of the intermediate spacer 53 toward the other end portion 532 opposite to the one end portion. The insertion grooves 53A and 53B are separated from each other in the left-right direction. Since the intermediate spacer 57 has the same shape as the intermediate spacer 53, description thereof is omitted.

  A method for fixing the spacer 51 to the groove 41 will be described with reference to FIGS. In order to push and expand the groove 41 in the vertical direction, the operator rotates the first bolt 71 fastened to the screw hole 325 in one direction with a tool (not shown) in the cavity portion 61 to reduce the amount of protrusion to the groove 41 side. Enlarge. The tip of the first bolt 71 pushes up the upper inner surface of the groove 41. Since the width of the groove 41 is expanded in the vertical direction, the operator can easily insert the spacer 51 into the groove 41. The operator inserts one end portion 511 (see FIG. 9) of the spacer 51 into the groove 41 from the right side and pushes it into the left side. The shaft portion of the first bolt 71 protruding upward from the screw hole 325 is disposed inside the insertion groove 51 </ b> A of the spacer 51. The position of the insertion hole 51 </ b> B of the spacer 51 is adjusted to the position of each of the insertion hole 324 and the screw hole 323. The positioning of the spacer 51 in the groove 41 is completed.

  An operator rotates the 1st volt | bolt 71 in the direction opposite to one direction with a tool in the cavity part 61, and makes the protrusion amount to the groove | channel 41 side small. As the position of the tip of the first bolt 71 is lowered, the inner surface on the upper side of the groove 41 is lowered and comes into contact with the upper surface of the spacer 51. The operator inserts the second bolt 81 into the insertion hole 324 from the cavity 61 side and fastens it to the screw hole 323 through the insertion hole 51B of the spacer 51. Therefore, the second bolt 81 can fix the spacer 51 in the groove 41. Since the second bolt 81 is thicker than the first bolt 71, the spacer 51 can be firmly fixed to the groove 41. The method for fixing the spacer 52 to the groove 42 is the same as the above fixing method. The first bolt 72 (see FIG. 4) can expand the width of the groove 42. The second bolt 82 (see FIG. 4) can fix the spacer 52 in the groove 42.

  A method for fixing the intermediate spacer 53 to the groove 43 will be described with reference to FIGS. In order to expand the groove 43 in the vertical direction, the operator rotates the first bolts 73 and 74 fastened to the screw holes 331 and 332 in one direction with a tool (not shown) in the second cavity 63B. Increase the amount of protrusion to the side. The front ends of the first bolts 73 and 74 push up the upper inner surface of the groove 43. Since the width of the groove 43 is expanded in the vertical direction, the operator can easily insert the intermediate spacer 53 into the groove 43. The operator inserts one end portion 531 (see FIG. 11) of the intermediate spacer 53 into the groove 43 from the front and pushes it backward. The operator may insert the one end portion 531 of the intermediate spacer 53 into the groove 43 from the rear and push it forward. The shaft portions of the first bolts 73 and 74 protruding upward from the screw holes 331 and 332 are respectively arranged inside the insertion grooves 53A and 53B of the intermediate spacer 53. The positions of the insertion grooves 53A and 53B of the intermediate spacer 53 are matched with the positions of the insertion holes 328 and 329 and the screw holes 326 and 327, respectively. The positioning of the intermediate spacer 53 in the groove 43 is completed.

  An operator rotates the 1st volt | bolts 73 and 74 in the direction opposite to one direction with a tool in the 2nd cavity part 63B, and makes the protrusion amount to the groove | channel 43 side small. As the positions of the tips of the first bolts 73 and 74 are lowered, the inner surface on the upper side of the groove 43 is lowered and comes into contact with the upper surface of the intermediate spacer 53. The operator inserts the second bolts 83 and 84 into the insertion holes 328 and 329 from the second cavity 63B side, and fastens them to the screw holes 326 and 327 via the insertion grooves 53A and 53B of the intermediate spacer 53. Therefore, the second bolts 83 and 84 can fix the intermediate spacer 53 in the groove 43. Since the second bolts 83 and 84 are thicker than the first bolts 73 and 74, the intermediate spacer 53 can be firmly fixed to the groove 43.

  Although not described in detail, the spacers 55 and 56 and the intermediate spacer 57 are fixed to the grooves 45 to 47 of the rear rail support portion 33, and the spacers 51 and 52 and the intermediate spacer 53 are fixed to the grooves 41 to 43 of the front rail support portion 32. It is the same as the fixing method.

  A method for correcting the pitching of the movable table 30 will be described with reference to FIGS. As described above, the movable table 30 is inserted and fixed in the grooves 41 to 43 of the front rail support portion 32 by inserting the spacers 51 and 52 and the intermediate spacer 53 and fixed to the grooves 45 to 47 of the rear rail support portion 33. The spacers 55 and 56 and the intermediate spacer 57 are inserted and fixed. In this state, the worker polishes the rail mounting surfaces 37 and 38 and finishes them, and delivers them as products to the factory production line. During use of the table device 7 on the production line, for example, an angular deviation defect sometimes occurs on the rail mounting surface 37 of the front rail support portion 32. The operator replaces the grooves 41 to 43 of the front rail support portion 32 with spacers 51 and 52 or intermediate spacers 53 having different thicknesses and fixes them with the second bolts 81 to 84. Therefore, since the movable table 30 can deform the rail mounting surface 37 in an arbitrary vertical direction, the pitching of the rail mounting surface 37 can be easily corrected. The same applies to the rail mounting surface 38 of the rear rail support portion 33.

  With reference to FIG. 2, the rolling correction method of the mobile stand 30 is demonstrated. The movable table 30 supports the pair of X-axis rails 22 and 23 with a front rail support portion 32 and a rear rail support portion 33, respectively. Therefore, the rail mounting surfaces 37 and 38 are sometimes twisted and deformed in the vertical direction. For example, there are cases where the right end side of the rail mounting surface 37 is inclined high and the left end side is inclined low, whereas the right end side of the rail mounting surface 37 is low and the left end side is inclined high. In this case, since the X-axis rails 22 and 23 attached to the rail attachment surfaces 37 and 38 are twisted in the vertical direction, it is necessary to correct the rolling. In this case, the operator may change the thicknesses of the spacers 51 and 52 inserted into the grooves 41 and 42 and the spacers 55 and 56 inserted into the grooves 45 and 46, respectively.

  For example, the plate thickness of the spacer 51 inserted into the groove 41 of the front rail support portion 32 and the plate thickness of the spacer 56 inserted into the groove 46 of the rear rail support portion 33 on the opposite side of the groove 41 are the same plate thickness T1. (For example, 5 mm). On the other hand, the plate thickness of the spacer 52 inserted into the groove 42 of the front rail support portion 32 and the plate thickness of the spacer 55 inserted into the groove 45 of the rear rail support portion 33 on the opposite side of the groove 42 are the same plate thickness T2. (For example, 10 mm). The plate thickness means that when the spacers 51, 52, 55, 56 are inserted into the grooves 41, 42, 45, 46, they are perpendicular to the grooves 41, 42, 45, 46 of the spacers 51, 52, 55, 56. Indicates the length in the direction of crossing.

  In the case of the above example, adjustment is made so that the plate thickness T1 <the plate thickness T2. The rail attachment surface 37 rises on the left end side due to the difference between the plate thicknesses T1 and T2 of the spacers 51 and 52, and falls on the right end side. The rail attachment surface 38 is lowered at the left end side and raised at the right end side due to the difference between the plate thicknesses T1 and T2 of the spacers 55 and 56. As a result, the movable table 30 can be deformed in a direction to correct the twist of the rail mounting surfaces 37 and 38, so that the rolling can be easily corrected. In the above example, the thickness of the spacer 51 and the thickness of the spacer 56 are set to the same thickness T1, but the thickness may be different. Similarly, the plate thickness of the spacer 52 and the plate thickness of the spacer 55 may be different.

  In the above description, the table 11 corresponds to the moving object of the present invention, the front rail support portion 32 corresponds to the first rail support portion of the present invention, and the rear rail support portion 33 corresponds to the second rail support portion of the present invention. The second bolts 81 to 84 correspond to the fixing means of the present invention, the groove 41 corresponds to the first groove of the present invention, the groove 42 corresponds to the second groove of the present invention, and the groove 45 corresponds to the main groove. The groove 46 corresponds to the fourth groove of the present invention, the spacer 51 corresponds to the first spacer of the present invention, the spacer 52 corresponds to the second spacer of the present invention, and the spacer 55 corresponds to the third groove of the present invention. Corresponds to the third spacer of the present invention, the spacer 56 corresponds to the fourth spacer of the present invention, the plate thickness T1 corresponds to the first plate thickness of the present invention, and the plate thickness T2 corresponds to the second plate thickness of the present invention. It corresponds to.

  As described above, the machine tool 1 of this embodiment includes the table device 7. The table device 7 supports a table 11 holding a workpiece so as to be movable in the X-axis direction and the Y-axis direction. The table device 7 includes a moving table 30. The moving table 30 supports the table 11 by the X-axis moving mechanism 21 so as to be movable in the X-axis direction. The moving table 30 includes a front rail support portion 32 and a rear rail support portion 33. The front rail support portion 32 and the rear rail support portion 33 extend in the moving direction between both ends of the moving table 30 in the moving direction of the table 11, and support the X-axis rails 22 and 23. The X axis rails 22 and 23 guide the table 11 in the X axis direction. The front rail support portion 32 and the rear rail support portion 33 include grooves 41 to 43. The grooves 41 to 43 extend parallel to the X-axis direction, and the spacers 51 and 52 and the intermediate spacer 53 are detachably inserted inside. The spacers 51 and 52 and the intermediate spacer 53 are fixed by second bolts 81 to 84, respectively. Therefore, when the angle deviation between the front rail support portion 32 and the rear rail support portion 33 is large, the machine tool 1 simply replaces the spacers 51 and 52 and the intermediate spacer 53 with different thicknesses in the grooves 41 to 43, and the front rail support portion 32. And the angle deviation produced in the rear rail support part 33 can be corrected easily.

  In the present embodiment, the front rail support portion 32 further includes a screw hole 325 that communicates with the groove 41 in the vertical direction. The first bolt 71 is screwed into the screw hole 325 from the cavity 61 side opposite to the groove 41 side, and can advance and retreat toward the inside of the groove 41. The spacer 51 to be inserted into the groove 41 includes an insertion groove 51A into which the shaft portion of the first bolt 71 protruding from the screw hole 325 inside the groove 41 can be inserted. The tip end portion of the shaft portion of the first bolt 71 is in contact with the inner surface facing the screw hole 325 inside the groove 41. When inserting the spacer 51 into the groove 41, the operator rotates the first bolt 71 in one direction with a tool. The shaft portion of the first bolt 71 can push the inner surface of the groove 41 to expand the width of the groove 41. Therefore, the operator can easily insert the spacer 51 into the groove 41 that is expanded.

  In the present embodiment, the front rail support portion 32 and the rear rail support portion 33 further include rail mounting surfaces 37 and 38. The rail attachment surfaces 37 and 38 extend in the X-axis direction and attach the X-axis rails 22 and 23. The grooves 41 to 43 extend in parallel to the rail mounting surfaces 37 and 38. Therefore, the machine tool 1 can easily correct the pitching of the rail mounting surfaces 37 and 38.

  In the present embodiment, the grooves 41 and 42 are further provided at both ends in the X-axis direction of the front rail support portion 32 and extend in parallel to the rail mounting surface 37. Therefore, the machine tool 1 can easily correct the pitching of the rail mounting surface 37 by changing the thickness of the spacers 51 and 52 inserted into the respective grooves 41 and 42 provided at both ends of the front rail support portion 32.

  The present invention can be variously modified in addition to the above embodiment. In the above embodiment, the grooves 41 to 43 are provided in the right end portion, the left end portion, and the center portion of the front rail support portion 32, and the spacers 51 and 52 and the intermediate spacer 53 are inserted, respectively. It is not limited to. For example, any of the grooves 41 to 43 may be omitted, and a groove may be further added between the groove 41 and the groove 43 and between the groove 42 and the groove 43. The same applies to the rear rail support portion 33.

  In the said embodiment, the front rail support part 32 and the rear rail support part 33 provide the grooves 41-43 so that it may become parallel with respect to the rail attachment surfaces 37 and 38, and insert in those grooves 41-43. Pitching can be corrected by changing the thickness of the spacers 51 and 52 and the intermediate spacer 53. On the other hand, for example, by providing a groove orthogonal to the rail mounting surfaces 37 and 38 and changing the thickness of the spacer inserted into the groove, the rail mounting surfaces 37 and 38 are deformed in an arbitrary horizontal direction. Also good. Specifically, a groove extending in the vertical direction may be formed on the front surface or the back surface of the front rail support portion 32 or on both surfaces. Therefore, this modification can easily correct the yawing of the rail mounting surfaces 37 and 38.

  In the above-described embodiment, the present invention is applied to the movable table 30 of the table device 7. However, the present invention may be applied to a member that supports a moving object in a movable manner, for example, the base 12 of the table device 7, the Z axis. You may apply to a moving mechanism.

  The table device 7 of the above embodiment can move the table 11 in two axial directions, that is, the X-axis direction and the Y-axis direction. Furthermore, in the table device 7 of the above embodiment, the Y-axis moving mechanism is provided on the upper surface of the base 12 and the X-axis moving mechanism 21 is provided on the upper surface of the moving table 30. A table device provided with a Y-axis moving mechanism on the upper surface of the moving table may also be used.

  The machine tool 1 of the above embodiment is a machine tool in which a main shaft on which a tool is mounted is movable in the Z-axis direction, and the table 11 is movable in two axes in the X-axis direction and the Y-axis direction. The mechanism of the tool moving mechanism that moves relative to the table 11 in the X-axis, Y-axis, and Z-axis directions is not limited to the above embodiment. For example, the table 11 may be a machine tool that can be fixed or rotated and moves the column in the X-axis direction and the Y-axis direction. In that case, the groove of the present invention may be provided in a movable body that supports the column so as to be movable. The machine tool 1 of the above embodiment is a vertical machine tool, but may be a horizontal machine tool.

  In the above embodiment, for example, when the spacer 51 is inserted into the groove 41, the first bolt 71 fastened to the screw hole 325 is rotated in one direction, and the groove 41 is pushed up by pushing up the inner surface on the upper side of the groove 41. However, the screw hole 325 and the first bolt 71 may be omitted.

  The table device 7 of the above embodiment is provided with a pair of Y-axis rails and a pair of X-axis rails 22 and 23, respectively. However, the number of Y-axis rails and X-axis rails is not limited to two. Or two or more.

DESCRIPTION OF SYMBOLS 1 Machine tool 11 Table 22, 23 X-axis rail 30 Moving stand 32 Front rail support part 33 Rear rail support part 37, 38 Rail mounting surface 41-43, 45-47 Groove 51, 52, 55, 56 Spacer 51A, 53A , 53B Insertion groove 53, 57 Intermediate spacer 71-74 First bolt 81-84 Second bolt T1, T2 Plate thickness

Claims (6)

In machine tools that cut workpieces with tools,
A moving table that movably supports moving objects;
A rail support portion that supports a rail that extends in the moving direction between both ends of the moving direction in which the moving object of the moving table moves, and guides the moving object in the moving direction;
A groove provided in the rail support portion and extending in a direction parallel or orthogonal to the moving direction;
A plate-like spacer that is detachably inserted into the groove;
A machine tool comprising fixing means for fixing the spacer to the groove. A screw hole provided in the rail support portion and communicating with the groove in a direction perpendicular to the moving direction;
A screw that is screwed into the screw hole from the side opposite to the groove side, and is capable of moving forward and backward toward the inside of the groove,
The spacer includes an insertion groove into which the shaft portion of the screw protruding from the screw hole can be inserted inside the groove.
The machine tool according to claim 1, wherein a tip portion of the shaft portion is in contact with an inner surface facing the screw hole inside the groove. The rail support portion is
Extending in the moving direction, comprising a mounting surface for mounting the rail;
The machine tool according to claim 1, wherein the groove extends in a direction parallel to or perpendicular to the mounting surface. The machine tool according to claim 3, wherein the groove is provided at least at both ends of the rail support portion in the moving direction and extends in parallel to the mounting surface. The rail support portion is
A first rail support portion and a second rail support portion that are arranged in parallel with each other and support the pair of rails, respectively.
The machine tool according to claim 4, wherein the groove is provided at both ends of the first rail support portion and the second rail support portion. The groove is
A first groove provided at one end of the first rail support portion;
A second groove provided at the other end opposite to the one end of the first rail support,
A third groove provided on one end of the second rail support part and located on the same side as the first groove;
Provided at the other end of the second rail support portion opposite to the one end, and a fourth groove located on the same side as the second groove,
The spacer is
A first spacer inserted into the first groove;
A second spacer inserted into the second groove;
A third spacer inserted into the third groove;
A fourth spacer inserted into the fourth groove,
The thickness of each of the first spacer and the fourth spacer is the same first thickness,
The thickness of each of the second spacer and the third spacer is the same second thickness,
The machine tool according to claim 5, wherein the first plate thickness and the second plate thickness are different.

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