Horizontal machine tool

Abstract

To provide a divisible horizontal machine tool having a trunnion table. [Solution] A horizontal machine tool (10) comprising a main frame (11), a spindle moving device (211) disposed on the main frame (11), a spindle head (291) supported by the spindle moving device (211) and having a horizontally extending spindle (291a) that is movable in the X-axis direction, Y-axis direction and Z-axis direction, a front frame (60) disposed in front of the main frame (11) when viewed from the direction of the tip of the spindle (291a), a trunnion table (70) disposed on the front frame (60) that moves in the W-axis direction parallel to the Z-axis and rotates around the A-axis (101) parallel to the X-axis, and a connecting block (80) that connects the main frame (11) and the front frame (60).

Description

Technical Field

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

Background Art

[0002] There is disclosed a horizontal machine tool having an X-axis guide rail disposed on the upper surface of a bed, a column mounted on the X-axis guide rail and movable in the X direction, a Y-axis guide rail disposed on one side surface of the column, a saddle supported by the Y-axis guide rail and movable in the Y direction, a Z-axis guide rail disposed on the saddle, and a spindle head horizontally supported by the Z-axis guide rail (Japanese Patent No. 4514310).

Summary of the Invention

Problems to be Solved by the Invention

[0003] When machining a large workpiece, the overall size becomes large, and for transportation reasons, it is necessary to have a split structure. However, in the above conventional horizontal machine tool, nothing is mentioned about the split structure.

[0004] The present invention has been made in view of the above actual situation, and an object thereof is to provide a horizontal machine tool having a trunnion table and capable of being split.

Means for Solving the Problems

[0005] A first aspect of the present invention is a main body frame, a spindle moving device disposed on the main body frame, a spindle head supported by the spindle moving device, having a horizontally extending spindle, and movable in the X-axis direction, Y-axis direction, and Z-axis direction, a front frame disposed in front of the main body frame as viewed from the tip direction of the spindle, a trunnion table disposed on the front frame, movable in a W-axis direction parallel to the Z-axis, and rotatable about an A-axis parallel to the X-axis, A connecting block that connects the main frame and the front frame, It is a horizontal machine tool equipped with [a specific feature / feature].

[0006] Preferred embodiments of the present invention are as follows:

[0007] The aforementioned previous frame is A pair of box-shaped frames are positioned at the left and right ends and are self-supporting on the floor, A bridge section connecting the pair of box-shaped frames, It has. The aforementioned horizontal machine tool is The following are arranged on the pair of box-shaped frames: W-axis guide and A rotary table that reciprocates through the W-axis guide and rotates around the A-axis, It has. The trunnion table is supported at both ends by the rotary table and tilts about the A axis.

[0008] The bridge section connects to the rear end of the box-shaped frame and opens up the space below the trunnion table.

[0009] The aforementioned horizontal machine tool is The inclined plate is positioned between the pair of box-shaped frames and further comprises an inclined plate having an outlet in the center in the left-right direction.

[0010] The aforementioned connection blocks are a pair, The pair of connecting blocks are arranged with a gap between them in the X-axis direction of the main frame.

[0011] The pair of connection blocks are, The torso and, A first flange portion is provided on one end of the torso portion and connected to the main body frame, It comprises a second flange portion provided on the other end of the body portion and connected to the front frame. The end faces of the first flange portion and the second flange portion are flat.

[0012] The main frame has a flat first reference surface to which the first flange portion is attached. The front frame has a flat second reference surface to which the second flange portion is attached. By bringing the end face of the first flange portion into contact with the first reference surface and the end face of the second flange portion into contact with the second reference surface, the main frame and the front frame are positioned in the Z-axis direction.

[0013] The system further comprises at least one of a first reference block provided around the first reference surface and in contact with the side surface of the first flange portion, and a second reference block provided around the second reference surface and in contact with the side surface of the second flange portion. The main frame and the front frame are positioned in the X-axis direction by bringing the side surface of the first flange portion into contact with the first reference block, or by bringing the side surface of the second flange portion into contact with the second reference block.

[0014] The trunnion table has a turntable that rotates around an axis B that is perpendicular to the axis A.

[0015] The trunnion table includes a pair of side plates that rotate around the A-axis and a base plate that connects the lower parts of the pair of side plates. The turntable is positioned in the center of the base plate.

[0016] It is preferable that the sum of the movement distance of the spindle head in the Z-axis direction and the movement distance of the trunnion table in the W-axis direction (total stroke) is approximately 1000 to 2000 mm.

[0017] The aforementioned horizontal machine tool is capable of cutting large workpieces consisting of three-dimensional shapes with sides of approximately 1000 to 2000 mm.

[0018] The horizontal machine tool may have a connection block that connects the main body frame and the front frame. The connection block may be composed of a pair. The pair of connection blocks may be arranged at intervals in the X-axis direction. Preferably, the pair of connection blocks are arranged at the left and right ends (both ends in the X-axis direction) of the horizontal machine tool.

[0019] The front frame may have a pair of box-shaped pedestals that are arranged at the left and right ends and stand independently on the floor surface, and a bridge portion that connects between the pair of box-shaped pedestals. The first and second W-axis guides may be respectively arranged on one and the other of the pair of box-shaped pedestals. The first and second drive units may be respectively arranged on one and the other of the pair of box-shaped pedestals. The first and second drive units move the first and second rotary tables in the Z-axis direction respectively.

[0020] The inclined plate is supported by the front frame. The inclined plate is supported by the pair of box-shaped pedestals.

Advantages of the Invention

[0021] According to the present invention, a horizontal machine tool having a trunnion table and capable of being divided can be provided.

Brief Description of the Drawings

[0022] [Figure 1] Perspective view of the horizontal machining center of the embodiment [Figure 2] View taken in the direction of arrow II in FIG. 1 [Figure 3] Cross-sectional view taken along line III-III in FIG. 2 [Figure 4] Cross-sectional view taken along line IV-IV in FIG. 2 [Figure 5] Cross-sectional view taken along line V-V in FIG. 4 [Figure 6] Cross-sectional view taken along line VI-VI in FIG. 4 [Figure 7] Cross-sectional view taken along line VII-VII in FIG. 2 [Figure 8] Exploded assembly view of the connection block [Figure 9] Flowchart showing the assembly procedure [Modes for carrying out the invention]

[0023] As shown in Figures 1 and 2, the horizontal machining center (horizontal machine tool) 10 of the embodiment has a machining section 10a, a workpiece holding section 10b, and a connecting section 10c. The machining section 10a is responsible for machining the workpiece 95 (see Figure 7). The workpiece holding section 10b is responsible for holding the workpiece 95 in a predetermined position. The connecting section 10C detachably connects the machining section 10a and the workpiece holding section 10b.

[0024] As shown in Figures 1 to 6, the machining section 10a includes a main frame (frame) 11, a pair of lower X-axis guides 13, a pair of fixed columns 15, an upper beam 17, an upper X-axis guide 19, machining units 20 and 22, a bellows cover (expandable cover) 40, and automatic tool changers (hereinafter abbreviated as ATC) 51 and 52.

[0025] For the sake of explanation, the X, Y, and Z axes are defined as shown in the diagram, with the left-right direction being the X direction (X1, X2 directions), the up-down direction being the Y direction (Y1, Y2 directions), and the front-back direction being the Z direction (Z1, Z2 directions). In Figure 1, the axis parallel to the X axis is defined as the A axis, the axis parallel to the Y axis is defined as the B axis, and the axes parallel to the Z axis are defined as the W1 and W2 axes.

[0026] For convenience, Figures 3 and 4 have been rotated 90 degrees. In the following explanation, unless it is necessary to distinguish between the X1 and X2 directions, they will simply be abbreviated as the X direction. The same applies to the Y and Z directions. The direction along the W1 and W2 axes may also be abbreviated as the W direction.

[0027] As shown in Figure 3, the lower X-axis guide 13 has a lower X-guide rail 13a and a lower X-guide block 13b. The lower X-guide rail 13a extends in the X direction and is fixed to the upper surface of the main frame 11. The lower X-guide block 13b is positioned on the lower X-guide rail 13a and moves in the X direction along the lower X-guide rail 13a.

[0028] As shown in Figure 1, the pair of fixed columns 15 are positioned at both ends of the main frame 11 in the X direction.

[0029] The upper beam 17 spans between the upper ends of a pair of fixed columns 15. The upper beam 17 extends in the X direction. As shown in Figure 3, the upper X-axis guide 19 has an upper X-guide rail 19a and an upper X-guide block 19b. The upper X-guide rail 19a extends in the X direction and is fixed to the back of the upper beam 17. The upper X-guide block 19b is positioned on the upper X-guide rail 19a and moves in the X direction along the upper X-guide rail 19a.

[0030] As shown in Figures 3 to 6, the machining unit 20 includes a moving column 211, a lower X-axis drive unit 231, an upper X-axis drive unit 251, a Y-axis guide 271, a Y-base 301, a Y-axis drive unit 331, a Z-axis guide 351, a spindle head 291, a spindle 291a, and a Z-axis drive unit 361.

[0031] The processing unit 22 is positioned symmetrically with respect to the XY plane with respect to the processing unit 20. The processing unit 22 has substantially the same configuration as the processing unit 20. Therefore, the processing unit 20 will be described below, and a detailed explanation of the processing unit 22 will be omitted.

[0032] As shown in Figure 3, the movable column 211 has a bracket 18 on its upper surface. The movable column 211 extends in the Y direction. The lower part of the movable column 211 is fastened to the lower X guide block 13b. The bracket 18 is fastened to the back of the upper X guide block 19b. The movable column 211 reciprocates in the X direction, guided by the lower X-axis guide 13 and the upper X-axis guide 19. The movable column 211 supports the spindle head 291.

[0033] The lower X-axis drive unit 231 is located below the moving column 211. The lower X-axis drive unit 231 includes a lower X-helical rack 231a, a lower X-motor 231b, and a lower X-helical gear 231c. The lower X-helical rack 231a extends in the X direction and is fixed to the main frame 11. The lower X-motor 231b is located at the lower end of the moving column 211. The lower X-helical gear 231c is connected to the lower X-motor 231b and meshes with the lower X-helical rack 231a.

[0034] The upper X-axis drive unit 251 is positioned above the moving column 211. The upper X-axis drive unit 251 includes an upper X-helical rack 251a, an upper X-motor 251b, and an upper X-helical gear 251c. The upper X-helical rack 251a extends in the X direction and is fixed to the bottom surface of the upper beam 17. The upper X-motor 251b is fixed to the upper end of the moving column 211. The upper X-motor 251b rotates in synchronization with the lower X-motor 231b. The upper X-helical gear 251c is connected to the upper X-motor 251b and meshes with the upper X-helical rack 251a.

[0035] As shown in Figures 4 and 6, the Y-axis guide 271 has a pair of Y-guide rails 271a and a plurality of Y-guide blocks 271b. The Y-guide rails 271a extend in the Y direction and are positioned on one side of the moving column 211 (closer to the center of the horizontal machining center 10). The Y-guide blocks 271b are positioned on the Y-guide rails 271a and move in the Y direction along the Y-guide rails 271a.

[0036] The Y-base 301 is L-shaped when viewed from the front. The Y-base 301 has a plate portion 301a and a box portion 301b. The plate portion 301a extends in the YZ direction. The plate portion 301a is fastened to the Y-guide block 271b. The box portion 301b is box-shaped with an upward opening and extends in the Z direction. The Y-base 301 is guided by the Y-axis guide 271 and reciprocates in the Y direction.

[0037] As shown in Figures 4 to 6, the Y-axis drive unit 331 includes a Y-helical rack 331a, a pair of Y-motors 331b, and a Y-helical gear 331c. The Y-helical rack 331a extends in the Y direction and is positioned on the moving column 211.

[0038] A pair of Y motors 331b are fastened to the upper and lower ends of the Y base 301. Y helical gears 331c are connected to the Y motors 331b and mesh with the Y helical racks 331a. The pair of Y motors 331b rotate synchronously, moving the Y base 301 in the Y direction.

[0039] As shown in Figure 5, a pair of Z-axis guides 351 have a Z-guide rail 351a and a Z-guide block 351b. The Z-guide block 351b is positioned on the upper surface of the box portion 301b and extends in the Z direction. The Z-guide rail 351a extends in the Z direction and is positioned on the Z-guide block 351b. The Z-guide rail 351a reciprocates in the Z direction on the Z-guide block 351b.

[0040] The spindle head 291 has a rectangular cross-section and extends in the Z direction. As shown in Figure 4, the spindle head 291 is positioned above the box section 301b. The spindle head 291 protrudes forward from the bellows cover 40. The spindle head 291 is fastened to the Z guide rail 351a. The spindle head 291 moves back and forth in the Z direction, guided by the Z-axis guide 351. The spindle 291a is supported at the tip of the spindle head 291. Tools stored in the ATC 51, 52 are detachably mounted on the spindle 291a. The tools rotate integrally with the spindle 291a and cut the workpiece 95.

[0041] As shown in Figure 4, the Z-axis drive unit 361 includes a lead screw 362 and a Z-motor 363. The lead screw 362 has a screw shaft 362a and a nut 362b. The screw shaft 362a is rotatably positioned inside the box section 301b. The nut 362b is fastened to the spindle head 291. The Z-motor 363 is positioned at the rear end of the box section 301b and connected to the screw shaft 362a. The Z-axis drive unit 361 drives the spindle head 291 in the Z direction.

[0042] Next, the workpiece holding section 10b will be described.

[0043] As shown in Figures 1, 2, and 7, the workpiece holder 10b includes a front frame (frame) 60, a pair of W-axis guides 61 and 62, a block 631, W-axis drive units (first drive unit and second drive unit) 622 and 625, W-bases (movable tables) 632 and 633, a pair of A-axis rotary tables 63 and 64, a trunnion table 70, and a swash plate 75. The workpiece holder 10b is symmetrical with respect to the YZ plane passing through the central axis B of the turntable 713. Figure 7 shows only the left half of the workpiece holder 10b. For convenience, the swash plate 75 is represented by a dashed line in Figure 2.

[0044] The front frame 60 is the base of the workpiece holding section 10b. The front frame 60 supports the W-axis guides 61, 62, the A-axis rotary tables 63, 64, the trunnion table 70, the block 631, the W-bases 632, 633, the swash plate 75, and the W-axis drive units 622, 625.

[0045] The front frame 60 has a pair of W-frames (box-shaped frames) 601 and a bridge section 602 (see Figure 7). The W-frames 601 are box-shaped frames. Each W-frame 601 is supported from the floor surface 46 by, for example, jacks 45. The jacks 45 are, for example, jack bolts. The bridge section 602 is suspended from the pair of W-frames 601 and connects the rear ends of the pair of W-frames 601. The bridge section 602 opens up the space in front of and below the trunnion table 70.

[0046] The weight of all structures 61-64, 70, 75, 631-633, 622, 625 supported by the bridge section 602 and the front frame 60, as well as the weight of the workpiece 95, is applied to the pair of W frames 601. The W frames 601 have sufficient strength to support these weights.

[0047] A pair of W-axis guides 61 each include a W-guide rail 611 and a W-guide block 612. The W-guide rail 611 extends in the W direction and is positioned on the upper surface of the W-frame 601. The W-guide block 612 is positioned on the W-guide rail 611 and reciprocates along the W-guide rail 611. The W-axis guide 62 is substantially identical to the W-axis guide 61.

[0048] The W-base 632 is fastened to the W-guide block 612. The W-base 632 is guided by the W-axis guide 61 and reciprocates in the W-direction. The W-base 633 is substantially identical to the W-base 632.

[0049] The W-axis drive unit 622 has a lead screw 623. The lead screw 623 includes a screw shaft 623a and a nut 623b. The screw shaft 623a extends along the W-axis and is rotatably supported on the W-frame 601. The nut 623b is fastened to the W-base 632. The W-axis drive unit 622 further includes a motor 624. The motor 624 is connected to the screw shaft 623a. The motor 624 feeds the W-base 632 in the W-axis direction.

[0050] The W-axis drive unit 625 is substantially identical to the W-axis drive unit 622. The W-axis drive unit 625 moves the W-base 633 in the W-axis direction in synchronization with the W-axis drive unit 622.

[0051] The A-axis rotary table 63 is fastened to the W-base 632 via block 631. The A-axis rotary table 63 rotates around the A-axis 101, which is parallel to the X-axis. The A-axis rotary table 64 rotates synchronously with the A-axis rotary table 63.

[0052] The trunnion table 70 is positioned between a pair of A-axis rotary tables 63 and 64. The trunnion table 70 is tiltably supported by the A-axis rotary tables 63 and 64 around the A-axis 101. The trunnion table 70 has a pair of side plates 711 and a base plate 712. The base plate 712 connects the lower ends of the pair of side plates 711. The turntable (B-axis rotary table) 713 is positioned on the base plate 712. The turntable 713 rotates around the B-axis 102. The B-axis 102 is perpendicular to the A-axis 101. The B-axis 102 is parallel to the Y-axis.

[0053] When the W-axis drive units 622 and 625 are driven and the W-bases 632 and 633 move in the W-axis direction, the A-axis rotary tables 63 and 64 and the trunnion table 70, which are attached to the W-bases 632 and 633 respectively, move in the W-axis direction. When the A-axis rotary tables 63 and 64 rotate, the trunnion table 70 tilts (rotates) around the A-axis 101. When the turntable 713 rotates, the workpiece 95 placed on the turntable 713 rotates around the B-axis 102.

[0054] This structure allows the workpiece 95 to move in the W-axis direction, rotate around the A-axis 101, and rotate around the B-axis 102. In other words, the workpiece 95 can be changed to any desired orientation.

[0055] The workpieces are, for example, approximately 1500mm x 1500mm in size. Examples of workpieces include automotive Gigacast parts and aircraft door frames.

[0056] The swash plate 75 is positioned below the trunnion table 70. The swash plate 75 is supported by the W frame 601 and the bridge section 602. The swash plate 75 is tray-shaped, sloping downwards from both ends towards the center. The swash plate 75 has an outlet 76 in the center. The outlet 76 is positioned in front of the bridge section 602. The outlet 76 is located between the W frames 601 and 603. The swash plate 75 collects coolant and chips sprayed onto the workpiece during machining and discharges them through the outlet 76.

[0057] The slanted plate 75 may extend between the front frame 60 and the main frame 11. The rear end of the slanted plate 75 may be supported by the main frame 11.

[0058] The connecting block 80 connects the machining section 10a and the workpiece holding section 10b. A pair of connecting blocks 80 are arranged on the left and right sides. The connecting block 80 has a body section 81, a flange section 82, and a flange section 83. The body section 81 is in the shape of a square pipe. The body section 81 may have a horizontal reference surface 81a on its upper surface. The horizontal reference surface 81a may be the bottom surface of a recess formed on the upper surface of the body section 81.

[0059] The flange portion 82 is rectangular in shape and is positioned at both ends of the body portion 81. The flange portion 82 has a plurality of bolt holes 85, an upper surface 82a, a contact side surface 82b, and an end surface 82e. The upper surface 82a is parallel to the ZX plane. The contact side surface 82b is positioned near the left and right ends of the main frame 11 and is parallel to the YZ plane. The end surface 82e is parallel to the XY plane. The horizontal reference surface 81a, the contact side surface 82b, and the end surface 82e are machined to have a predetermined finished surface. The horizontal reference surface 81a and the contact side surface 82b are reference surfaces for alignment.

[0060] The flange portion 83 has bolt holes 85, pin holes 87, and an end face 83e. The end face 83e is substantially identical to the end face 82e. The pin holes 87 are positioned precisely with respect to the contact surface 82b and the horizontal reference plane 81a.

[0061] The rear surface (the surface facing the main frame 11) 60a of the front frame 60 has a reference surface 112. The reference surface 112 is machined to a predetermined finished surface. The reference surface 112 has screw holes (not shown) and pin holes (not shown). The connecting block 80 is fixed to the reference surface 112 by pins 88 and bolts 86. The connecting block 80 is positioned in the XY direction relative to the reference surface 112 by the pins 88. In addition, the end surface 83e and the reference surface 112 come into contact, allowing for precise positioning in the Z direction.

[0062] The front surface 11a of the main frame 11 (the surface facing the front frame 60) has a reference block 110 and a reference surface 111. The reference block 110 is positioned adjacent to the reference surface 111. The reference block 110 has a reference side surface 110a. The reference side surface 110a and the reference surface 111 are machined to have a predetermined finished surface. The reference surface 111 has screw holes (not shown). Therefore, by bringing the end surface 82e into contact with the reference surface 111 and bringing the contact side surface 82b of the flange portion 82 into contact with the reference side surface 110a of the reference block 110, the main frame 11 and the front frame 60 are positioned in the left-right direction (X direction) and the front-back direction (Z direction).

[0063] The main frame 11 has a reference plate 113 on its upper surface 11b. The front frame 60 has a reference plate 114 on its upper surface 60b. An installation plate 90 is positioned to bridge the reference plates 113 and 114. This installation plate 90 is used to adjust the height position between the main frame 11 and the front frame 60 (details will be described later).

[0064] Next, the method for connecting the machining section 10a and the workpiece holding section 10b will be explained.

[0065] As shown in Figure 9, the worker fixes the flange portion 83 to the reference surface 112 (S1). The flange portion 83 is precisely fixed to the reference surface 112 by the pin 88. Next, the worker moves the front frame 60 relative to the main frame 11 in the Z direction so that the end face 82e comes into contact with the reference surface 111 and the contact side surface 82b comes into contact with the reference side surface 110a (S2). Next, the worker temporarily fixes the flange portion 82 to the reference surface 111 with the bolt 86 (S3).

[0066] The end face 82e of flange portion 82 abuts against the reference surface 111, and the end face 83e of flange portion 83 abuts against the reference surface 112, thereby positioning the main frame 11 and the front frame 60 in the front-rear direction (Z direction). The abutting side surface 82b of flange portion 82 abuts against the reference side surface 110a of reference block 110, and the abutting side surface 83b of flange portion 83 abuts against the side surface of reference block (not shown), thereby positioning the main frame 11 and the front frame 60 in the left-right direction (Y direction).

[0067] Next, the worker places the mounting plate 90 between the reference plates 113 and 114 and sets a spirit level (not shown) on the mounting plate 90 (S4). Next, the worker adjusts the jacks 45 located at the bottom of the main frame 11 and the front frame 60 while looking at the spirit level (S5). The height of the main frame 11, the front frame 60, and the mounting plate 90 is adjusted until the levelness falls within the reference value, and once it falls within the reference value, the bolts 86 are tightened (S6).

[0068] Step S4 can be modified as follows: The worker installs a riser block (not shown) on the horizontal reference plane 81a. When the main frame 11 and the front frame 60 are precisely positioned, the height of the top surface of the riser block is configured to match the height of the reference plate 113 or reference plate 114. The worker installs the mounting plate 90 between the top surface of the riser block and the reference plate 113.

[0069] The main frame 11 may also have an upper reference block (not shown). In this case, the upper surface 82a of the flange portion 82 and the bottom surface of the upper reference block are machined to a predetermined finished surface. The upper surface 82a may be in contact with the bottom surface of the upper reference block. The operator may adjust the main frame 11 and the front frame 60 with jacks so that the horizontal reference surface 81a is horizontal.

[0070] Alternatively, the flange portion 83 and the reference surface 112 may be positioned on the main frame 11. In this case, the flange portion 82, the reference surface 111, and the reference block 110 may be positioned on the front frame 60. In other words, the connecting block 80 may be fixed with pins on the front frame 60 side or on the main frame 11 side.

[0071] The horizontal processing machine 10 of this embodiment produces the following effects.

[0072] We can provide a horizontal machining center (machine tool) 10 having a trunnion table 70 capable of accommodating a large workpiece 95.

[0073] After placing the workpiece 95 on the trunnion table 70, the workpiece 95 can be held in any position by rotating it around the A-axis 101 and B-axis 102. Furthermore, by moving the trunnion table 70 in the W-axis direction, the workpiece 95 can be moved to any position in the front-to-back direction. The workpiece 95 can then be held in a predetermined position and orientation. Afterward, the workpiece 95 can be machined by changing the tool as appropriate. In particular, because it is equipped with a pair of W-axis guides 61 and 62, a trunnion table 70, and a turntable 713, it can be held in any position.

[0074] The weight of the B-axis, trunnion table 70, and workpiece 95 is applied to the A-axis rotary table 63. The loads of the A-axis rotary table 63, block 631, and W-base 632 are applied to the W-frame 601 via the W-axis guide 61. The W-frame 601 is self-supporting from the floor surface 46. The W-frame 603 and its superstructure are identical to those of the W-frame 601 and its superstructure.

[0075] A pair of W-axis guides 61 and a W-axis drive unit 622 are arranged on the W-frame 601. The A-axis rotary table 63 is independently guided by the W-axis guides 61 on the W-frame 601 and moved by the W-axis drive unit 622. The A-axis rotary table 64 is independently guided by the W-axis guides 62 on the W-frame 603 and moved by the W-axis drive unit 625. Then, the trunnion table 70 is placed over the A-axis rotary tables 63 and 64. Both ends of the trunnion table 70 are independently guided and driven.

[0076] This allows the left and right A-axis (rotation axis) 101 of the trunnion table 70 to move parallel to the X-axis, even when the width of the trunnion table 70 is significantly long (for example, 1000mm to 2000mm). Furthermore, the rigidity of the trunnion table 70 can be minimized. This allows the mass of even a large trunnion table 70 to be reduced. Additionally, the inertia applied to the A-axis rotary tables 63 and 64 can be reduced. Finally, the workpiece holding section 10b can be made more compact.

[0077] Since the left and right W-frames 601 are independent of each other, the bridge section 602 only needs to connect the W-frames 601 and 603 to each other. This minimizes the rigidity of the front frame 60. It also allows for a compact configuration of the front frame 60. Furthermore, the space in front of and below the bridge section 602 can be opened up. As a result, a coolant tank and chip recovery device can be placed in the space in front of and below the bridge section 602. And the discharge port 76 can be placed below the trunnion table 70.

[0078] A horizontal machining center 10 having a trunnion table 70 can be made into a three-part structure consisting of a machining section 10a, a workpiece holding section 10b, and a connecting section 10c. Therefore, the entire machining center can be made smaller and is more convenient to transport.

[0079] Furthermore, the horizontal processing machine 10 has a three-part structure, making on-site assembly easy. Reference surfaces 111 and 112 are provided on the main frame 11 and the front frame 60, making positioning in the front-to-back direction easy. Positioning in the left-to-right direction is also easy by bringing the contact surface 82b of the flange portion 82 into contact with the reference surface 110a of the reference block 110. The same applies to the flange portion 83. By placing the mounting plate 90 between the reference plates 113 and 114 of the main frame 11 and the front frame 60, and installing a spirit level on the mounting plate 90, the horizontality of both can be easily measured. Then, the horizontality can be easily adjusted by jacking up based on that measurement.

[0080] Therefore, the large horizontal processing machine 10 can be easily reproduced on-site in its pre-shipment state.

[0081] The present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. All technical matters included in the technical concept described in the claims are covered by the present invention. The embodiments described above are preferred examples, but those skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed herein, and these are included in the technical scope described in the appended claims.

[0082] Furthermore, the details described in Japanese Patent Application No. 2023-080267 can be referenced when implementing the machined section 10a. Also, the details described in Japanese Patent Application No. 2024-114635 can be referenced when implementing ATC 51 and 52. In other words, Japanese Patent Application Nos. 2023-080267 and 2024-114635 are incorporated as part of this specification. [Explanation of symbols]

[0083] 10. Horizontal machining centers (horizontal machine tools) 11. Main frame (frame) 211 Moving column (spindle moving device) 291 Spindle head 291a main shaft 60 Front frame (frame) 61, 62 W-axis guide 63, 64 A-axis rotary table (first rotary table, second rotary table / rotational table) 70 Trunnion Table 80 connection blocks 101 A-axis

Claims

1. The main frame and A spindle moving device arranged on the main frame, Supported by the aforementioned spindle moving device, it has a spindle that extends horizontally and a spindle head that is movable in the X-axis direction, Y-axis direction and Z-axis direction, Viewed from the direction of the tip of the main spindle, the front frame is positioned in front of the main frame, A trunnion table is positioned in the front frame, moves in the W-axis direction parallel to the Z-axis, and rotates around the A-axis parallel to the X-axis, A connecting block that connects the main frame and the front frame, A horizontal machine tool equipped with the following features.

2. The aforementioned previous frame is A pair of box-shaped frames are positioned at the left and right ends and are self-supporting on the floor, A bridge section connecting the pair of box-shaped frames, It has, The aforementioned horizontal machine tool is The following are arranged on the pair of box-shaped frames: W-axis guide and A rotary table that reciprocates through the W-axis guide and rotates around the A-axis, It has, The trunnion table is supported at both ends by the rotary table and tilts about the A axis. A horizontal machine tool according to claim 1.

3. The bridge section connects the rear end of the box-shaped frame and opens up the space below the trunnion table. The horizontal machine tool according to claim 2.

4. A slanted plate positioned between the pair of box-shaped frames, further comprising a slanted plate having an outlet in the center in the left-right direction, A horizontal machine tool according to claim 2 or 3.

5. The aforementioned connection blocks are a pair, The pair of connecting blocks are arranged at intervals in the X-axis direction of the main frame. A horizontal machine tool according to any one of claims 1 to 4.

6. The pair of connection blocks are, The torso and, A first flange portion is provided on one end of the torso portion and connected to the main body frame, It comprises a second flange portion provided on the other end of the aforementioned body portion and connected to the front frame, The end faces of the first flange portion and the second flange portion are flat. A horizontal machine tool according to any one of claims 1 to 5.

7. The main frame has a flat first reference surface to which the first flange portion is attached. The front frame has a flat second reference surface to which the second flange portion is attached. A horizontal machine tool according to any one of claims 1 to 6, wherein the Z-axis positioning of the main frame and the front frame is achieved by bringing the end face of the first flange portion into contact with the first reference surface and the end face of the second flange portion into contact with the second reference surface.

8. A horizontal machine tool according to any one of claims 1 to 7, further comprising at least one of a first reference block provided around the first reference surface and in contact with the side surface of the first flange portion, and a second reference block provided around the second reference surface and in contact with the side surface of the second flange portion, wherein the positioning of the main frame and the front frame in the X-axis direction is achieved by bringing the side surface of the first flange portion into contact with the first reference block, or by bringing the side surface of the second flange portion into contact with the second reference block.

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