Machine tool

Abstract

The present invention relates to a machine tool (10). The machine tool (10) is provided with a saddle (14) relatively moving in a first direction with respect to a bed (12), a table (16) relatively moving in a second direction orthogonal to the first direction with respect to the saddle (14), and a first clamping member (60) fixed to the bed (12) and the table (16) to fix the relative positions of the bed (12) and the table (16).

Description

TECHNICAL FIELD

[0001] The present application relates to a machine tool that processes a work object using a tool. BACKGROUND

[0002] As the machine tool, there is a wire electric discharge machine. In Japanese Patent Application Publication No. 2018-069409, a wire electric discharge machine is disclosed that processes a work object by generating discharge between the work object and a wire electrode in a processing liquid.

[0003] In the wire electric discharge machine of Japanese Patent Application Publication No. 2018-069409, a saddle (X-axis saddle) is mounted on a bed, a table (Y-axis saddle) is mounted on the saddle, and a UV saddle (V-axis saddle) is mounted on a column that stands on the bed. In addition, a UV table (U-axis saddle) is movably installed on a side surface portion of the UV saddle, and a sleeve shaft (Z-axis saddle) is movably installed on a side surface portion of the UV table. SUMMARY

[0004] However, when conveying in the wire electric discharge machine, the saddle, the table, the UV saddle, the UV table, and the sleeve shaft are each clamped so as not to move. Specifically, the saddle is clamped on the bed, the table is clamped on the saddle, the UV saddle is clamped on the column, the UV table is clamped on the UV saddle, and the sleeve shaft is clamped on the UV table.

[0005] However, since the saddle, the table, the UV saddle, the UV table, and the sleeve shaft are clamped individually, there is a tendency for the work time of the clamping work to become longer. As a result, the preparation for conveying in the wire electric discharge machine becomes troublesome.

[0006] Therefore, an object of the present application is to solve the above problems.

[0007] A mode of the present application is a machine tool that processes a work object using a tool, including: a saddle that relatively moves in a first direction with respect to a bed; a table that relatively moves in a second direction orthogonal to the first direction with respect to the saddle; and a first clamping member that is fixed to the bed and the table and fixes the relative positions of the bed and the table.

[0008] According to the mode of the present application, even if the saddle is not clamped, the movement of the saddle can be suppressed by the first clamping member. Therefore, compared to the case where the saddle and the table are clamped by clamping members, respectively, the number of clamping members can be reduced, the work time of the clamping work can be shortened, and as a result, the conveying can be simplified. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1is a side view showing the configuration of the machine tool.

[0010] Figure 2 is a front view showing the configuration of the machine tool.

[0011] Figure 3 is a view showing the mounting state of the first clamping member.

[0012] Figure 4A is a view showing the mounting state of the second clamping member and the third clamping member, Figure 4B is a view showing the mounting state of the second clamping member and the third clamping member from a different viewpoint than Figure 4A .

[0013] Figure 5 is a view showing the state of the assembly of the first clamping member, the second clamping member, and the third clamping member halfway.

[0014] Figure 6 is a view showing the state of the assembly of the first clamping member, the second clamping member, and the third clamping member as one assembly. DETAILED DESCRIPTION

[0015] Figure 1 is a side view showing the configuration of the machine tool 10. Figure 2 is a front view showing the configuration of the machine tool 10. In the present embodiment, the machine tool 10 is a wire electric discharge machine that performs machining on a work object in a machining liquid by generating discharge between the wire electrode and the work object. The machine tool 10 has a bed 12, a saddle 14, a table 16, a column 18, a UV saddle 20, a UV table 22, and a sleeve shaft 24.

[0016] The bed 12 is a frame of the machine tool 10. The bed 12 is disposed on a base such as a floor. The bed 12 has a mounting surface 12F for mounting a mounting object.

[0017] The saddle 14 is movably connected to a first guide rail 26 for guiding the saddle 14. The first guide rail 26 is disposed on the mounting surface 12F of the bed 12 and extends in a first direction. The number of the first guide rail 26 can be one or a plurality. In the present embodiment, a pair of first guide rails 26 is disposed on the mounting surface 12F of the bed 12 at intervals (see FIG. 2). Figure 2

[0018] A first drive shaft 28 is disposed between the pair of first guide rails 26. The first drive shaft 28 is connected to a motor shaft of a saddle drive motor and extends in the first direction. A first sliding portion 30 is provided on the first drive shaft 28. The saddle 14 is fixed to the first sliding portion 30. The first sliding portion 30 slides on the first drive shaft 28 as the saddle drive motor rotates. ​

[0019] The saddle 14 moves on the first guide rail 26 together with the first sliding portion 30 as the saddle drive motor rotates. That is, the saddle 14 relatively moves in the first direction with respect to the bed 12. In a case where the saddle drive motor rotates positively, the saddle 14 moves to the positive side in the first direction. On the other hand, in a case where the saddle drive motor rotates negatively, the saddle 14 moves to the negative side in the first direction. In addition, in the present embodiment, the first direction is a Y direction corresponding to a Y axis of a mechanical coordinate system defined by the machine tool 10. The positive side (+Y side) of the Y direction is a front side of the machine tool 10, and the negative side (-Y direction) of the Y direction is a rear side of the machine tool 10.

[0020] The table 16 is movably connected to the second guide rail 32 for guiding the table 16. The second guide rail 32 is provided on the upper surface of the saddle 14 and extends in a second direction orthogonal to the first direction in the plane. The number of the second guide rail 32 can be one or a plurality. In the present embodiment, a pair of the second guide rails 32 is provided at intervals on the upper surface of the saddle 14 (see FIG. 2). Figure 1

[0021] The second drive shaft 34 is arranged between the pair of the second guide rails 32. The second drive shaft 34 is connected to a motor shaft of the table drive motor and extends in the second direction. The second sliding portion 36 is provided on the second drive shaft 34. The table 16 is fixed to the second sliding portion 36. The second sliding portion 36 slides on the second drive shaft 34 as the table drive motor rotates.

[0022] The table 16 moves on the second guide rail 32 together with the second sliding portion 36 as the table drive motor rotates. That is, the table 16 relatively moves in the second direction with respect to the saddle 14. In a case where the table drive motor rotates positively, the table 16 moves to the positive side in the second direction. On the other hand, in a case where the table drive motor rotates negatively, the table 16 moves to the negative side in the second direction. In addition, in the present embodiment, the second direction is an X direction corresponding to an X axis of the mechanical coordinate system defined by the machine tool 10. The positive side (+X side) of the X direction is a right side of the machine tool 10, and the negative side (-X direction) of the X direction is a left side of the machine tool 10.

[0023] The column 18 is a support member and is erected on the mounting surface 12F of the bed 12. The arm 38 is fixed to the front surface of the column 18. The arm 38 extends in the Y direction and penetrates a side wall of the machining tank 40 placed on the table 16. The arm 38 is provided with a sealing mechanism that seals a gap between the arm 38 and the machining tank 40. Even if the machining tank 40 is movable together with at least one of the saddle 14 and the table 16, the sealing mechanism seals the gap between the machining tank 40 and the arm 38.

[0024] ​The UV saddle 20 is movably connected to a third guide rail 42 for guiding the UV saddle 20. The third guide rail 42 is provided on the upper surface of the column 18 and extends in a third direction. The number of the third guide rail 42 can be one or a plurality. In the present embodiment, a pair of third guide rails 42 are provided at intervals on the upper surface of the column 18 (see FIG. 1). Figure 2 ).

[0025] A third drive shaft (not shown) is arranged between the pair of third guide rails 42. The third drive shaft is connected to the motor shaft of the UV saddle drive motor and extends in the third direction. A third sliding portion (not shown) is provided on the third drive shaft. The UV saddle 20 is fixed to the third sliding portion. The third sliding portion slides on the third drive shaft as the UV saddle drive motor rotates.

[0026] The UV saddle 20 moves on the third guide rail 42 together with the third sliding portion as the UV saddle drive motor rotates. That is, the UV saddle 20 relatively moves in the third direction with respect to the column 18. In the case where the UV saddle drive motor rotates in the positive direction, the UV saddle 20 moves to the positive side in the third direction. On the other hand, in the case where the UV saddle drive motor rotates in the negative direction, the UV saddle 20 moves to the negative side in the third direction. In the present embodiment, the third direction is a V direction corresponding to a V axis of a machine coordinate system defined by the machine tool 10. In the present embodiment, the V direction is the same direction as the Y direction. Alternatively, the V direction can be the same direction as the X direction.

[0027] The UV table 22 is movably connected to a fourth guide rail 46 for guiding the UV table 22. The fourth guide rail 46 is provided on the front surface of the UV saddle 20 and extends in a fourth direction orthogonal to the third direction. The number of the fourth guide rail 46 can be one or a plurality. In the present embodiment, a pair of fourth guide rails 46 are provided at intervals on the front surface of the UV saddle 20 (see FIG. 1). Figure 1 ).

[0028] A fourth drive shaft 48 is arranged between the pair of fourth guide rails 46. The fourth drive shaft 48 is connected to the motor shaft of the UV table drive motor and extends in the fourth direction. A fourth sliding portion 50 is provided on the fourth drive shaft 48. The UV table 22 is fixed to the fourth sliding portion 50. The fourth sliding portion 50 slides on the fourth drive shaft 48 as the UV table drive motor rotates.

[0029] The UV stage 22 moves on the fourth guide rail 46 together with the fourth slide 50 by rotation of the UV stage drive motor. That is, the UV stage 22 relatively moves in the fourth direction with respect to the UV saddle 20. In the case where the UV stage drive motor is positive rotation, the UV stage 22 moves to the positive side in the fourth direction. On the other hand, in the case where the UV stage drive motor is negative rotation, the UV stage 22 moves to the negative side in the fourth direction. In addition, in the present embodiment, the fourth direction is a U direction corresponding to a U axis of a mechanical coordinate system defined by the machine tool 10. In the present embodiment, the U direction is the same direction as the X direction. In addition, in the case where the V direction is the same direction as the X direction, the U direction can also be the same direction as the Y direction.

[0030] The sleeve shaft 24 is movably connected to a fifth guide rail 52 for guiding the sleeve shaft 24. The fifth guide rail 52 is provided on the front surface of the UV stage 22 and extends in a fifth direction orthogonal to the first direction and the second direction. The number of the fifth guide rail 52 can be one or a plurality. In the present embodiment, a pair of fifth guide rails 52 are provided at intervals on the front surface of the UV stage 22 (refer to FIG. 2). Figure 1 ).

[0031] A fifth drive shaft (not shown) is arranged between the pair of fifth guide rails 52. The fifth drive shaft is connected to the motor shaft of the sleeve shaft drive motor and extends in the fifth direction. A fifth slide (not shown) is provided on the fifth drive shaft. The sleeve shaft 24 is fixed to the fifth slide. The fifth slide slides on the fifth drive shaft by rotation of the sleeve shaft drive motor.

[0032] The sleeve shaft 24 moves on the fifth guide rail 52 together with the fifth slide by rotation of the sleeve shaft drive motor. That is, the sleeve shaft 24 relatively moves in the fifth direction with respect to the UV stage 22. In the case where the sleeve shaft drive motor is positive rotation, the sleeve shaft 24 moves to the positive side in the fifth direction. On the other hand, in the case where the sleeve shaft drive motor is negative rotation, the sleeve shaft 24 moves to the negative side in the fifth direction. In addition, in the present embodiment, the fifth direction is a Z direction corresponding to a Z axis of the mechanical coordinate system defined by the machine tool 10. The positive side (+Z side) of the Z direction is the upper side of the machine tool 10, and the negative side (-Z side) of the Z direction is the lower side of the machine tool 10. In addition, the downward direction is the direction of the action of gravity.

[0033] An upper guide 54 is provided on the sleeve shaft 24. A lower guide 56 is provided on the arm 38. The upper guide 54 guides the wire electrode supplied from the wire supply mechanism while supporting the wire electrode. The lower guide 56 guides the wire electrode supplied from the wire supply mechanism via the upper guide 54 while supporting the wire electrode.

[0034] In the machine tool 10, the saddle 14, the table 16, the column 18, the UV saddle 20, the UV table 22, and the sleeve shaft 24 are arranged at a prescribed position (a conveyance fixed position) at the time of conveyance on the machine tool 10. The conveyance fixed position is a position determined in advance as a relative position with respect to the bed 12 at the time of conveyance. In this case, the machine tool 10 has a first clamping member 60, a second clamping member 62, and a third clamping member 64.

[0035] Figure 3 is a view showing the mounting state of the first clamping member 60. The first clamping member 60 is a member that fixes the relative position of the bed 12 and the table 16. The first clamping member 60 connects the bed 12 and the table 16 arranged at the conveyance fixed position, and holds the table 16 at the conveyance fixed position with respect to the bed 12. Further, the first clamping member 60 holds the movement of the saddle 14 arranged at the conveyance fixed position. The first clamping member 60 is fixed to the bed 12 and the table 16 by bolts BT, respectively.

[0036] In other words, bolt holes capable of screwing the bolts BT are formed in each of the bed 12 and the table 16. The bolt holes formed in the bed 12 and the table 16, respectively, are not covered by a cover or the like and are exposed. Therefore, the bolt holes are easily visible, and there is no need for work to expose the bolt holes from a cover or the like at the time of mounting the first clamping member 60.

[0037] In addition, the number of the bolt holes formed in the bed 12 and the number of the bolt holes formed in the table 16 can be one or more than two. In addition, in Figure 3 , an example in which the number of the bolt holes formed in the bed 12 is four and the number of the bolt holes formed in the table 16 is four is shown.

[0038] Figure 4A is a view showing the mounting state of the second clamping member 62 and the third clamping member 64. Figure 4B is a view showing the mounting state of the second clamping member 62 and the third clamping member 64 from a different viewpoint than Figure 4A .

[0039] The second clamping member 62 is a member that fixes the relative position of the column 18 and the UV table 22. The second clamping member 62 connects the column 18 arranged at the conveyance fixed position and the UV table 22, and holds the column 18 and the UV table 22 at the conveyance fixed position with respect to the bed 12. Further, the second clamping member 62 holds the movement of the UV saddle 20 arranged at the conveyance fixed position. The second clamping member 62 is fixed to the column 18 and the UV table 22 by bolts BT, respectively.

[0040] In other words, the column 18 and the UV table 22 are each formed with a bolt hole into which the bolt BT is screwed. The bolt holes formed in the column 18 and the UV table 22, respectively, are not covered with a cover or the like and are exposed. Therefore, the bolt holes are easily visible, and there is no need for work to expose the bolt holes from a cover or the like at the time of mounting the second clamping member 62.

[0041] In addition, the number of bolt holes formed in the column 18 and the number of bolt holes formed in the UV table 22 can be one or two or more. In addition, in Figure 4A and Figure 4B , an example is shown in which the number of bolt holes formed in the column 18 is two and the number of bolt holes formed in the UV table 22 is four.

[0042] The third clamping member 64 is a member that fixes the relative position of the sleeve shaft 24 with respect to the second clamping member 62. The third clamping member 64 connects the second clamping member 62 and the sleeve shaft 24 disposed in the conveyance fixing position, and holds the sleeve shaft 24 in the conveyance fixing position with respect to the bed 12. At this time, the second clamping member 62 is in a state of connecting the column 18 and the UV table 22. The third clamping member 64 is fixed to the second clamping member 62 and the sleeve shaft 24, respectively, by the bolt BT.

[0043] In other words, the column 18 and the UV table 22 are each formed with a bolt hole into which the bolt BT is screwed. The bolt holes formed in the column 18 and the UV table 22, respectively, are not covered with a cover or the like and are exposed. Therefore, the bolt holes are easily visible, and there is no need for work to expose the bolt holes from a cover or the like at the time of mounting the second clamping member 62.

[0044] In addition, the number of bolt holes formed in the column 18 and the number of bolt holes formed in the UV table 22 can be one or two or more. In addition, in Figure 4A and Figure 4B , an example is shown in which the number of bolt holes formed in the column 18 is two and the number of bolt holes formed in the UV table 22 is four.

[0045] At least during machining of the work object, the first clamping member 60, the second clamping member 62, and the third clamping member 64 are detached from the machine tool 10. The first clamping member 60, the second clamping member 62, and the third clamping member 64 detached from the machine tool 10 are formed so as to be assembled.

[0046] Figure 5 is a view showing a state of the first clamping member 60, the second clamping member 62, and the third clamping member 64 halfway through assembly. Figure 6 is a view showing a state in which the first clamping member 60, the second clamping member 62, and the third clamping member 64 are assembled into one assembly 66.

[0047] First, to assemble the assembly 66, the second clamping member 62 and the third clamping member 64 are overlapped in this order on the first clamping member 60. Next, the bolt BT is inserted through the through-hole 62H formed in the second clamping member 62 and the through-hole 64H formed in the third clamping member 64. Then, the bolt BT is screwed with the bolt hole 60H formed in the first clamping member 60. Thus, the assembly 66 is assembled. Note that the bolt BT used in the assembly of the assembly 66 is one of the plurality of bolts BT used in the fixation of the first clamping member 60, the second clamping member 62, and the third clamping member 64.

[0048] When the first clamping member 60, the second clamping member 62, and the third clamping member 64 are assembled into the assembly 66, the accommodation space SP is formed in the assembly 66. In the accommodation space SP, the bolts BT other than the bolt BT used in the assembly of the assembly 66 are accommodated, among the plurality of bolts BT used in the fixation of the first clamping member 60, the second clamping member 62, and the third clamping member 64.

[0049] As described above, in the machine tool 10 of the present embodiment, in the case of conveyance, the first clamping member 60 fixes the relative position of the saddle 14 to the table 16 arranged at the conveyance fixation position. Thus, even if the saddle 14 is not clamped, the movement of the saddle 14 can be suppressed by the first clamping member 60. Therefore, compared to the case where the saddle 14 and the table 16 are clamped by clamping members respectively, the number of clamping members can be reduced, and the operation time of the clamping work can be shortened. As a result, the conveyance can be simplified.

[0050] Further, in the machine tool 10 of the present embodiment, in the case of conveyance, the second clamping member 62 fixes the relative position of the column 18 to the UV table 22 arranged at the conveyance fixation position. In addition, the third clamping member 64 fixes the relative position of the sleeve shaft 24 to the second clamping member 62. Thus, even if the UV saddle 20 is not clamped, the movement of the UV saddle 20 can be suppressed by the second clamping member 62, and in addition, the relative position of the sleeve shaft 24 to the second clamping member 62 can be fixed. Therefore, compared to the case where the UV saddle 20, the UV table 22, and the sleeve shaft 24 are clamped by clamping members respectively, the number of clamping members can be reduced, and the operation time of the clamping work can be shortened. As a result, the conveyance can be simplified.

[0051] [Modified Example]

[0052] As the machine tool 10, a machining device that presses a tool against a workpiece to machine the workpiece can also be used instead of the wire electrical discharge machining device of the embodiment. In the machining device, the UV saddle 20 and the UV table 22 are not provided, and the saddle 14, the table 16, and the bushing shaft 24 are provided. The bushing shaft 24 of the machining device is movably provided with respect to the column 18.

[0053] The following description can be understood from the embodiment and the modified example.

[0054] The present application relates to a machine tool (10) that machines a workpiece using a tool, the machine tool (10) including: a saddle (14) that moves relatively in a first direction with respect to a body (12); a table (16) that moves relatively in a second direction orthogonal to the first direction with respect to the saddle; and a first clamping member (60) that is fixed to the body and the table and fixes the relative positions of the body and the table.

[0055] Thus, even if the saddle is not clamped, the movement of the saddle can be suppressed by the first clamping member. Therefore, compared to a case in which the saddle and the table are clamped by clamping members, respectively, the number of clamping members can be reduced, the work time of the clamping work can be shortened, and as a result, the conveyance can be simplified.

[0056] The machine tool (10) is a wire electrical discharge machining device that machines a workpiece in a machining liquid by generating discharge between the workpiece and a wire electrode, the machine tool (10) including: a UV saddle (20) that moves relatively in a third direction with respect to a column (18) erected on a body; a UV table (22) that moves relatively in a fourth direction orthogonal to the third direction with respect to the UV saddle; a bushing shaft (24) that moves relatively in a fifth direction orthogonal to the first direction and the second direction with respect to the UV table; a second clamping member (62) that is fixed to the column and the UV table and fixes the relative positions of the column and the UV table; and a third clamping member (64) that is fixed to the second clamping member and the bushing shaft and fixes the relative position of the bushing shaft with respect to the second clamping member.

[0057] Thus, even if the UV saddle is not clamped, the movement of the UV saddle can be suppressed by the second clamping member, and the relative position of the bushing shaft with respect to the second clamping member is fixed. Therefore, compared to a case in which the UV saddle, the UV table, and the bushing shaft are clamped by clamping members, respectively, the number of clamping members can be reduced, the work time of the clamping work can be shortened, and as a result, the conveyance can be simplified.

[0058] The first direction and the third direction can be the same direction, and the second direction and the fourth direction can be the same direction. Thus, the saddle and the UV saddle can move relatively in the same direction, and the table and the UV table can move relatively in the same direction.

Claims

1. A machine tool (10) that performs machining on a work object using a tool, the machine tool characterized by comprising: a saddle (14) that moves relatively in a first direction with respect to a body (12); a table (16) that moves relatively in a second direction orthogonal to the first direction with respect to the saddle; and a first clamping member (60) that is fixed to the body and the table, fixes the relative positions of the body and the table, and prevents the relative movement of the saddle in the first direction.

2. The machine tool according to claim 1, characterized in that the machine tool is a wire electrical discharge machine that performs machining on the work object by generating discharge between a wire electrode and the work object in a machining liquid, the machine tool comprises: a UV saddle (20) that moves relatively in a third direction with respect to a column (18) erected on the body; a UV table (22) that moves relatively in a fourth direction orthogonal to the third direction with respect to the UV saddle; a sleeve shaft (24) that moves relatively in a fifth direction orthogonal to the first direction and the second direction with respect to the UV table; a second clamping member (62) that is fixed to the column and the UV table, fixes the relative positions of the column and the UV table; and a third clamping member (64) that is fixed to the second clamping member and the sleeve shaft, fixes the relative position of the sleeve shaft with respect to the second clamping member.

3. The machine tool according to claim 2, characterized in that the first direction and the third direction are the same direction, and the second direction and the fourth direction are the same direction.

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