JP2010105071A - Workpiece processing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece processing machine having a structure capable of keeping a processing height and easily increasing assembly precision. <P>SOLUTION: The top surface 12B of a box-shaped column 12 and the front surface 12A thereof are orthogonal to each other, a processing unit 14 is supported movably in a front/rear direction and a right/left direction on the top surface 12B, a table 13 for supporting the workpiece is vertically movably supported on the front surface 12A, the height position of a tool 15 supported on the processing unit 14 is fixed, and the workpiece is vertically moved, so that the workpiece is freely processed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a workpiece processing machine that processes a workpiece attached to a table.

There exists a grinding machine which grinds the surface of a work (also called a work) with a grinding wheel rotating at high speed. This type of grinding machine is generally known as a surface grinding machine that has a table that reciprocates left and right and performs surface grinding, and a blade grinding machine (also called a tool grinding machine) that limits the workpiece to be ground to a cutting tool. (For example, see Patent Documents 1 and 2).
JP 2002-113659 A JP-A-11-114819

However, in the work processing machine that reciprocates the table described in Patent Document 1 to the left and right, a large installation space is required for moving the table to the left and right, and the processing unit (both the spindle unit and the spindle head) is required. The machining height changes. Moreover, since the frame that supports the table and the frame (column) that supports the processing unit are separate parts, the assembly accuracy between the table and the processing unit is difficult to obtain.
Further, in the blade grinder described in Patent Document 2, since the holder for holding the workpiece and the processing unit are supported separately from each other in the frame, the assembly accuracy between the holder and the processing unit is not easily obtained. Met.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a workpiece processing machine having a structure in which the processing height does not change and the assembly accuracy is easily obtained.

  In order to achieve the above object, the present invention provides a table for supporting a workpiece unit on a front surface of a box-shaped column, wherein the top surface and the front surface of the column are orthogonal to each other, and are supported on the top surface so as to be movable in the front-rear and left-right directions. The workpiece is supported so as to be movable up and down, the height position of the tool supported by the machining unit is fixed, and the workpiece is moved up and down so that the workpiece can be machined. According to this invention, if the machining height does not change and the orthogonality between the top surface and the front surface of the column is appropriately secured, the assembly accuracy between the machining unit and the table can be easily secured. it can. Further, the installation space can be reduced as compared with the conventional table in which the table is reciprocated left and right.

In the above configuration, the top surface of the column is formed with a pair of top surface flat portions extending in parallel in the front-rear direction, a first linear motion guide rail is provided on the top surface flat portion, and the first movement to the first linear motion guide rail is performed. The second moving guide rail extending in the left-right direction is supported by the first moving table, the second moving table is supported by the second moving guide rail, and the processing unit is supported by the second moving table. You may make it do.
Further, in the above configuration, a pair of front flat portions extending in the vertical direction are formed on the front surface of the column, and a pair of left and right blocks are supported on the front flat portion with a space therebetween in the vertical direction. The extended third linear motion guide rail may be supported so as to be movable in the vertical direction, and the table may be supported by the third linear motion guide rail.
Further, in the above configuration, a ball screw extending in the vertical direction is rotatably supported on the front surface of the column, and a drive motor for rotating the ball screw is spaced forward and backward between the ball screw. The opening may be disposed inside the column, and the column may be formed with an opening through which a power transmission member for transmitting power between the drive motor and the ball screw passes. In this case, the power transmission member may be a belt that transmits power between a drive pulley attached to a motor shaft of the drive motor and a driven pulley attached to the ball screw.

  In the present invention, the top surface and the front surface of the box-shaped column are orthogonal to each other, the processing unit is supported on the top surface so as to be movable in the front-rear and left-right directions, and the table supporting the workpiece is supported on the front surface so as to be movable up and down. Since the workpiece is configured to be machineable by fixing the height position of the tool supported by the unit and moving the workpiece up and down, a workpiece processing machine with a structure where the machining height does not change and assembly accuracy can be easily obtained is provided. Can do.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 3 respectively show a side view, a top view, and a front view of a workpiece processing machine according to an embodiment of the present invention. In the figure, an arrow F indicates the front of the workpiece processing machine, an arrow L indicates the left side, and an arrow U indicates the upper side.
This work processing machine 10 includes a base 11 installed on the floor, a column 12 standing on the base 11, and a table movably arranged on the front surface 12A of the column 12 in the vertical direction (corresponding to the Z-axis direction). 13 and a processing unit 14 supported on the top surface 12B of the column 12 so as to be movable in the left-right direction (corresponding to the X-axis direction) and the front-rear direction (corresponding to the Y-axis direction). Further, in the figure, reference numeral 15 denotes a tool of a cutting grindstone attached to the tip of the rotary main shaft 14A extending toward the front of the column 12.

  Further, the work processing machine 10 includes a control panel 16 that houses control parts for numerically controlling each part of the work processing machine 10 (coordinates and moving speeds of the table 13 and the processing unit 14, the rotation speed of the processing unit 14, etc.). And an operation panel 17 connected to the control panel 16 for inputting various operations and displaying various information. That is, the workpiece processing machine 10 is configured as an NC (Numerical Control) grinding machine that grinds a workpiece by numerical control. 1 to 3 exemplify the case where the control panel 16 is installed on the rear side of the base 11 and the operation panel 17 is installed on the front side of the base 11, the present invention is not limited to this layout. You may change suitably according to a request etc.

The base 11 is integrally formed of, for example, a casting, and is installed horizontally on the floor via a leveling block or the like. The column 12 has a substantially rectangular parallelepiped box shape in appearance, and has a shape in which a plurality of ribs are disposed in an internal space. For example, the column 12 is integrally formed of a casting, and is disposed at a substantially center of the upper surface of the base 11. Is done. Here, FIGS. 4A, 4B, and 4C respectively show a front view, a side view, and a top view of the column 12 alone, and FIGS. 5A, 5B, and 5C show various components on the column 12. FIG. The front view of the state which assembled | attached, the figure which shows an internal structure, and a top view are each shown.
As shown in FIGS. 4A, 4B, and 4C, flanges 21 are integrally formed on the left and right sides of the column 12, and a plurality of (in this example, a total of eight) flanges 21 are formed on the left and right flanges 21. Bolt insertion holes 21 </ b> A are formed, and the columns 12 are fixed to the base 11 by fastening the bolts through the bolt insertion holes 21 </ b> A to the fastening holes formed in the base 11.

A vertical driving device (Z-axis driving device) 30 (see FIG. 1) for moving the table 13 in the vertical direction (Z-axis direction) is attached to the front surface 12A of the column 12. More specifically, as shown in FIGS. 4A to 4C, the front surface 12A of the column 12 has a pair of front flat portions 22 extending in parallel vertically from the upper end of the column to the lower end of the column. Between the pair of left and right front flat portions 22, a recessed portion 23 recessed in the rear side extends in the vertical direction.
As shown in FIGS. 5A to 5C, a pair of upper and lower rail support blocks (hereinafter referred to as blocks) 31 are attached to the pair of left and right front flat portions 22 with bolts with a space left and right. For each pair of upper and lower blocks 31, a Z-axis linear motion guide rail (third linear motion guide rail) 32 extending along the vertical direction is supported movably in the vertical direction. In addition, a Z-axis ball screw (third ball screw) 33 that is rotatably supported via a pair of upper and lower bearings 33A and 33B is supported in a recess 23 that extends in the vertical direction between the left and right front flat portions 22. . A Z-axis drive motor (third drive motor) 35 serving as a drive source for the ball screw 33 is supported in a space inside the column 12 with a front-rear space between the Z-axis ball screw 33 ( The rotation of the Z-axis drive motor 35 is transmitted to the Z-axis ball screw 33 via the belt-type power transmission mechanism 36 (see FIGS. 5B and 1).

  That is, in this configuration, the Z-axis ball screw 33 extends over the concave portion 23, and the upper end of the Z-axis ball screw 33 is exposed through the upper bearing 33A, and is exposed to the exposed upper end. A driven pulley 36A is attached, and a support plate that supports the bearing 33A is extended rearward. A Z-axis drive motor 35 is supported on the support plate in parallel with the Z-axis ball screw 33 with its motor shaft facing upward. A drive pulley 36B is attached to the upper end of the shaft, and both pulleys 36A and 36B are arranged at the same height with a space in the front and rear direction. The front wall of the column 12 is formed with a front wall opening 25 through which a belt (power transmission member) 36C wound around the pulleys 36A and 36B passes. In this configuration, by using a toothed belt for the belt 36C, friction loss is reduced and slipping is also avoided.

The table 13 is fixed to the Z-axis linear motion guide rail 32 that is movable up and down as described above, that is, is supported integrally with the Z-axis linear motion guide rail 32 so as to be vertically movable. The table 13 is connected to a Z-axis feed nut 37 attached to the Z-axis ball screw 33. Thus, when the Z-axis ball screw 33 is rotated by the Z-axis drive motor 35, the table 13 moves up and down integrally with the Z-axis feed nut 37.
As described above, the Z-axis ball screw 33 and the Z-axis drive motor 35 are arranged in the front-rear direction across the front wall of the column, so that the Z-axis drive motor 35 is arranged on one end side of the Z-axis ball screw 33. Thus, the long Z-axis ball screw 33 can be employed. Thereby, the movement stroke of the table 13, that is, the Z-axis movement stroke can be ensured long.
In addition, since the Z-axis linear motion guide rail 32 is moved up and down, there is no need to lengthen the Z-axis linear motion guide rail 32 even if the Z-axis motion stroke is lengthened. This also ensures a long Z-axis motion stroke. Easy structure. In this case, if the table 13 is moved downward, the Z-axis linear motion guide rail 32 is positioned below the column top surface 12B (see FIGS. 1 and 3), and the Z-axis linear motion guide rail 32 is moved upward. Protrusion can be suppressed.

Further, as shown in FIG. 4B, an opening (hereinafter referred to as a side wall opening) 26 is also formed on the side wall of the column 12, and the side wall opening 26 can reduce the weight of the column 12, and the Z Operations such as attachment / detachment of the shaft drive motor 35 can be facilitated.
FIG. 6 is a side view showing the processing unit 14 together with the peripheral configuration. As shown in this figure, on the top surface 12B of the column 12, a front / rear left / right drive device (XZ axis drive device) 40 for moving the processing unit 14 in the front / rear direction (Y-axis direction) and the left / right direction (X-axis direction) is provided. It is attached.
First, the front-rear moving structure (Y-axis moving structure) of the front-rear left-right drive device 40 will be described. As shown in FIGS. 4A to 4C, the top surface 12B of the column 12 has a pair of top surface flat portions extending in parallel in the front-rear direction from the front end of the column to the rear end of the column at both ends of the top surface 12B. 27 is formed with a space left and right, and a recessed portion 28 recessed downward is formed between the pair of top surface flat portions 27 so as to extend in the front-rear direction.
As shown in FIGS. 5A to 5C, each of the pair of top surface flat portions 27 includes Y-axis linear motion guide rails (first linear motion guide rails) 41 extending in the front-rear direction. A pair of front and rear Y-axis moving bases (first moving bases) 42 are attached to the Y-axis linear motion guide rails 41 and are guided by the guide rails 41 so as to be movable in the front-rear direction.

  A Y-axis ball screw (first ball screw) 44 extending in the front-rear direction is rotatably supported via a bearing 45 in the recess 28 extending in the front-rear direction between the left and right top flat portions 27. A Y-axis drive motor (first drive motor) 46 is coaxially connected to the rear end of the Y-axis ball screw 44. The Y-axis ball screw 44 is attached with a Y-axis feed nut 47 that moves in the axial direction of the ball screw 44 when rotated by a Y-axis drive motor 46.

Next, the left / right moving structure (X-axis moving structure) of the front / rear / left / right drive device 40 will be described.
7A and 7B are a plan view and a side view showing a left-right moving structure (X-axis moving structure). FIG. 8A is a diagram showing the machining unit 14 and the X-axis ball screw 56 together with the peripheral configuration, and FIG. 8B shows the machining unit 14 and the X-axis linear motion guide rail 52 together with the peripheral configuration. FIG.
As shown in FIGS. 7A and 7B, the plurality of (four in this example) Y-axis moving bases 42 described above extend along the left-right direction via rail support bases 50 extending in the left-right direction of the column 12. A pair of X-axis linear motion guide rails (second linear motion guide rails) 52 extending in this manner are supported. The rail support base 50 includes a gripping portion 50A (see FIG. 8B) for gripping a Y-axis mounting nut 47 attached to the Y-axis ball screw 44, whereby the rail is supported by the Y-axis drive motor 46. The support base 50 is movable in the front-rear direction (Y-axis direction).
As shown in FIGS. 7 (A) and 7 (B), the rail support base 50 is formed with a pair of upper surface flat portions 51 extending in parallel in the front-rear direction on the upper surface of the support base 50 with a space therebetween. The X-axis linear motion guide rail 52 is fixed to the pair of upper flat portions 51 with bolts. In addition, the rail support base 50 is formed with a concave portion 55 that is recessed downward between the pair of upper surface flat portions 51. The concave portion 55 has an X-axis ball screw (second ball screw) extending in the left-right direction. 56 is rotatably supported via a bearing 57, and an X-axis drive motor (second drive motor) 58 is coaxially connected to one end (the left end in this example) of the X-axis ball screw 56.

As shown in FIG. 6, the processing unit 14 is connected to a pair of X-axis moving bases (second moving bases) 59 that are guided by a pair of X-axis linear motion guide rails 52 via an adjustment liner 18. While being fixed, it is connected to an X-axis feed nut 60 provided on the X-axis ball screw 56 by a gripping portion 14X (see FIG. 8A) provided on the lower surface of the processing unit 14. As a result, the machining unit 14 is moved in the left-right direction by the X-axis drive motor 58.
This processing unit 14 is called a spindle unit or a spindle head, and is a processing that includes a rotating spindle 14A to which a cutting wheel tool 15 is attached at the tip, and supports the rotating spindle 14A and incorporates a driving motor for rotating the spindle. The rotary main shaft 14A extends in the horizontal direction from the processing unit main body 14B toward the front of the column 12, and is configured as a so-called horizontal type.

  The housing of the processing unit main body 14B has a substantially box shape, and is formed of, for example, a casting. A pair of lower surface flat portions 14C extending in parallel to the left and right are formed on the lower surface of the housing with a space in the front and rear. The X-axis moving table 59 is bolted to the lower flat portion 14C via a substantially flat adjustment liner 18, respectively. Since the X-axis moving base 59 is attached to the processing unit main body 14B in this way, the front / rear / left / right drive including the processing unit 14 and the X-axis moving base 59 is achieved by accurately forming the lower surface flat portion 14C of the processing unit main body 14B. Assembly accuracy with the device 40 can be easily ensured. Further, as described above, the guide rails 41, 52, 32, the moving bases 42, 59, and the block 31 are also attached to the flat portions 27, 51, 22, respectively. Therefore, the flat portions 27, 51, 22 are formed with high accuracy. As a result, the assembly accuracy can be easily secured.

In addition, as shown in FIGS. 8A and 8B, the front / rear / right / left drive device 40 is configured such that when the processing unit 14 is moved to one end side in the X-axis direction, When moving to the position directly above the Y-axis linear motion guide rail 41 and moving to the opposite side, the rotation main shaft 14A of the machining unit 14 moves to the position directly above the other Y-axis linear motion guide rail 41 as shown in FIG. Is configured to do. According to this, since the center of gravity of the machining unit 14 (for example, the center of gravity is located on the axis of the rotation main shaft 14A) is always located between the pair of left and right Y-axis linear motion guide rails 41, the load on the machining unit 14 In addition, the force acting during processing can be supported by both Y-axis linear motion guide rails 41 of the front / rear / right / left drive device 40.
In this way, in this configuration, as shown in FIG. 1, the processing unit 14 is supported on the column top surface 12B via the front / rear / right / left drive device 40, so that the weight of the processing unit 14 and the force acting at the time of processing, etc. The load can be received by the entire column 12, and the rigidity required for the entire workpiece processing machine 10 can be easily ensured.
Note that the movement range of the machining unit 14 is not limited between the pair of Y-axis linear motion guide rails 41, and the machining unit 14 may be configured to be movable out of the Y-axis linear motion guide rails 41. . According to this, the movement range of the processing unit 14, that is, the Y-axis movement stroke can be widened. Further, since the machining unit 14 can be retracted to a position away from the workpiece, the workpiece attaching / detaching operation and the tool exchanging operation (blade exchanging operation) can be facilitated. That is, the design of the strokes of the X, Y, and Z axes of the work machine 10 may be changed as appropriate according to the customer's request.

When the workpiece is machined by the workpiece processing machine 10 having this configuration, the height position of the tool 15 supported by the machining unit 14 is fixed, and the table 13 is moved up and down to machine the workpiece supported by the table 13. I do. In this case, since the table 13 moves up and down, it is possible to process from a high workpiece to a low workpiece at the same height.
Moreover, since the table 13 is a flat table, it has a high degree of freedom as an attachment surface for a workpiece and a workpiece holder, and various workpiece holders can be attached.

9 and 10 are diagrams showing examples of using the workpiece holder. In each figure, (A) to (C) show three views (a front view, a side view, and a top view) of the workpiece processing machine, respectively.
In the workpiece processing machine 10 shown in FIG. 9, a rotary table 71 that is rotatable about a vertical axis (Z axis) (in the drawing, the rotation direction is indicated by α) is attached to the table 13, and the workpiece attached to the rotary table 71. The case where a workpiece can be supported via a holder (jig) 72 is shown.
Further, in the workpiece processing machine 10 shown in FIG. 10, the table 13 is rotatable about the front and rear axis (Y axis) (in the drawing, the rotation direction is indicated by β) and rotated about the left and right axis (X axis). A case is shown in which a flexible work holder (jig) 73 is attached (in the drawing, the rotation direction is indicated by γ) and the work can be supported via the jig 73.

  By using the rotary table 71 and the work holders 72 and 73 as shown in FIGS. 9 and 10, the position and posture of the work can be changed as appropriate, the work is rotated, and the tool 15 is It can be processed while rotating. That is, since the workpiece processing machine 10 has a high degree of freedom of the workpiece holder, a surface grinding machine or cylinder that performs surface grinding by manufacturing or exchanging the workpiece holder according to the application or individual needs. It can be used as any machine such as a cylindrical grinder that grinds the outer periphery of a workpiece, an internal grinder that grinds the inner surface of a hole, or a blade grinder that grinds a specific tool.

As described above, in this configuration, the top surface 12B and the front surface 12A of the box-shaped column 12 are orthogonal to each other, support the machining unit 14 so as to be movable in the front-rear and left-right directions, and place a workpiece on the front surface 12A. Since the supporting table 13 is supported so as to be movable up and down, the height position of the tool 15 supported on the machining unit 14 is fixed, and the workpiece is moved up and down so that the workpiece can be machined freely. The processing machine 10 can be provided.
In this configuration, if the orthogonality between the top surface 12B and the front surface 12A of the column is appropriately ensured, the assembly accuracy between the processing unit 14 and the table 13 can be easily ensured. Moreover, since the column top surface 12B receives the weight of the processing unit 14 and the force acting during processing, sufficient support rigidity can be ensured by sufficiently ensuring the rigidity (vertical rigidity, etc.) of the column 12. .
In this case, since the column 12 is a simple rectangular box having a substantially rectangular parallelepiped shape, the degree of orthogonality between the top surface 12B and the front surface 12A can be easily ensured as compared with the case where the column has a complicated three-dimensional shape. It is easy to ensure the rigidity of itself, and it is easy to ensure the assembly accuracy and increase the overall rigidity.
Furthermore, the processing unit 14 moves in the front-rear and left-right directions on the top surface 12B of the column 12, and the table 13 moves up and down on the front surface 12A of the column. It is also possible to reduce the space. Accordingly, it is possible to provide the workpiece processing machine 10 having a structure in which the processing height does not change, the installation space is small, and the assembly accuracy is easily obtained.

Further, in this configuration, a pair of top surface flat portions 27 extending in the front-rear direction are formed on the top surface 12B of the column 12, and the Y-axis linear motion guide rail (first linear motion guide rail) is formed on the top surface flat portion 27. 41 is provided, and a Y-axis moving table (first moving table) 42 is supported on the Y-axis moving guide rail (first moving guide rail) 41, and the Y-axis moving table 42 extends in the left-right direction. A guide rail (second linear motion guide rail) 52 is supported, and an X-axis linear motion guide rail (second linear motion guide rail) 52 is supported by an X-axis movement base (second movement base) 59, and this X-axis movement is supported. Since the processing unit 14 is supported on the base 59, the assembly accuracy and support rigidity of the guide rails 41 and 52 can be sufficiently secured, and the processing unit 14 can be moved with high accuracy.
Further, a pair of front flat portions 22 extending in the vertical direction are formed on the front surface 12A of the column 12, and a pair of upper and lower blocks 42 are supported on the front flat portions 22 with a space left and right. Since the Z-axis linear motion guide rail (third linear motion guide rail) 32 extending in the vertical direction is supported so as to be movable in the vertical direction, and the table 13 is supported on the Z-axis linear motion guide rail 32, the assembly accuracy of the guide rail 32 In addition, sufficient support rigidity can be secured, whereby the table 13 can be moved with high accuracy, and the protrusion of the guide rail 32 toward the column top surface 12B can be suppressed.

  Further, a Z-axis ball screw 33 extending in the vertical direction is rotatably supported on the front surface 12A of the column 12, and a Z-axis drive motor 35 for rotating the Z-axis ball screw 33 is provided with a Z-axis ball screw 32. A belt 36 </ b> C (power transmission member) that transmits power between the Z-axis drive motor 35 and the Z-axis ball screw 33 is disposed inside the column 12 with a space in front and rear. Since the front wall opening 25 through which is passed is formed, a long Z-axis ball screw 33 can be used, and a long movement stroke of the table 13 can be secured.

  In addition, embodiment mentioned above shows the one aspect | mode of this invention to the last, and this invention is not limited to this. For example, in the above-described embodiment, the case where the present invention is applied to a grinding machine has been described. However, the present invention is not limited to this and may be applied to other workpiece processing machines. In the above embodiment, the case where the belt-type power transmission mechanism 36 is used as the power transmission mechanism between the Z-axis ball screw 33 and the Z-axis drive motor 35 has been described. Other power transmission mechanisms may be used. Further, the present invention can be applied not only to a general-purpose workpiece processing machine but also to a customized workpiece processing machine that can widely respond to requests from customers and the like.

It is a side view of the workpiece processing machine which concerns on one Embodiment of this invention. It is a top view of a workpiece processing machine. It is a front view of a workpiece processing machine. (A) is a front view of a single column, (B) is a side view, and (C) is a top view. (A) is a front view of a state in which various components are assembled to a column, (B) is a view showing an internal structure, and (C) is a top view. It is a side view which shows a processing unit with a periphery structure. (A) is a top view which shows the left-right movement structure, (B) is a side view. (A) is a figure which shows a process unit and an X-axis ball screw with a periphery structure, (B) is a figure which shows a process unit and an X-axis linear motion guide rail with a periphery structure. It is a figure where it uses for description of a workpiece holder. It is a figure where it uses for description of a workpiece holder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Work processing machine 11 Base 12 Column 12A Front surface 12B Top surface 13 Table 14 Processing unit 15 Tool 16 Control panel 17 Operation panel 22 Front flat part 27 Top flat part 31 Rail support block (block)
32 Z-axis linear motion guide rail (3rd linear motion guide rail)
33 Z-axis ball screw (third ball screw)
35 Z-axis drive motor (third drive motor)
36C belt (power transmission member)
40 Front / rear / left / right drive (XZ-axis drive)
41 Y-axis linear motion guide rail (first linear motion guide rail)
42 Y-axis moving table (first moving table)
44 Y-axis ball screw (first ball screw)
46 Y-axis drive motor (first drive motor)
51 Flat portion on the upper surface 52 X-axis linear motion guide rail (second linear motion guide rail)
56 X-axis ball screw (second ball screw)
58 X-axis drive motor (second drive motor)
59 X-axis moving table (second moving table)
71 Rotary table 72, 73 Work holder (jig)

Claims (4)

  The top and front of the box-shaped column are orthogonal to each other, the machining unit is supported on the top so that it can be moved back and forth and left and right, and the table that supports the workpiece is supported on the front so that it can be moved up and down. A workpiece processing machine characterized in that a workpiece can be processed freely by fixing the height position of the tool and moving the workpiece up and down.   A pair of top flat portions extending in parallel in the front-rear direction are formed on the top surface of the column, a first linear guide rail is provided on the top flat portion, and the first moving table is supported by the first linear guide rail. The second moving guide rail extending in the left-right direction is supported by the first moving table, the second moving table is supported by the second moving guide rail, and the processing unit is supported by the second moving table. The workpiece processing machine according to claim 1.   A pair of front flat portions extending in the vertical direction are formed on the front surface of the column, and a pair of left and right blocks are supported on the front flat portions with a space therebetween, and a third linear motion extending in the vertical direction on the blocks. The work processing machine according to claim 1 or 2, wherein a guide rail is supported so as to be movable in a vertical direction, and the table is supported by the third linear motion guide rail.   A ball screw extending in the vertical direction is rotatably supported on the front surface of the column, and a drive motor for rotating the ball screw is provided inside the column with a space between the ball screw and the front and rear. 4. An opening through which a power transmission member for transmitting power between the drive motor and the ball screw passes is formed in the column. The workpiece processing machine described.

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