Machine tool

Abstract

This allows for space savings on machine tools while maintaining the functionality of the mist collector. [Solution] A machine tool according to one embodiment has a partition wall that divides a space above a base in a housing into a machining chamber where machining is performed with a tool and an accommodation chamber that accommodates a headstock. This machine tool includes a workpiece spindle rotatably supported on the headstock and with a tip exposed in the machining chamber, a coolant discharge unit that is disposed in the machining chamber and discharges coolant when a workpiece supported by the workpiece spindle is machined, a mist collector that is disposed in the space above the headstock in the accommodation chamber and has an outlet that opens to a side surface of the housing, a mist inlet that is provided in the partition wall and opens toward the machining chamber, and a pipe that is disposed in the accommodation chamber and connects a suction port of the mist collector to the mist inlet.

Description

[Technical field]

[0001] The present invention relates to a machine tool, and more particularly to the arrangement and configuration of a mist collector that collects coolant mist. [Background technology]

[0002] When machining a workpiece in a machine tool, coolant is supplied to cool the tool and workpiece and to remove chips. This coolant turns into mist in the machining chamber, and if it is discharged outside the machine as is, it can cause contamination inside the factory. For this reason, a mist collector is provided to collect the coolant mist (see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6915131 [Patent Document 2] Patent No. 7144631 Summary of the Invention [Problem to be solved by the invention]

[0004] Such mist collectors are generally installed separately from the machine tool, or attached to the outer surface of the machine tool's housing (splash guard). In the former case, it is necessary to secure installation space for the mist collector outside the machine tool. Also, space is required for the piping that connects the machining chamber and the mist collector. On the other hand, in the latter case, it is also necessary to secure space for the mist collector outside the machine, and it is necessary to prevent interference with other structures. [Means for solving the problem]

[0005] One aspect of the present invention is a machine tool having a partition wall that divides a space above a base in a housing into a machining chamber where machining is performed with a tool and an accommodation chamber that accommodates a headstock. The machine tool includes a workpiece spindle rotatably supported on the headstock and having a tip exposed to the machining chamber, a coolant discharge unit disposed in the machining chamber and discharging coolant when machining a workpiece supported by the workpiece spindle, a mist collector disposed in the space above the headstock in the accommodation chamber and having an outlet opening on a side surface of the housing, a mist inlet provided in the partition wall and opening toward the machining chamber, and a pipe disposed in the accommodation chamber and connecting a suction port of the mist collector to the mist inlet. Effect of the Invention

[0006] According to the present invention, it is possible to realize space saving of a machine tool while maintaining the function of a mist collector. [Brief description of the drawings]

[0007] [Figure 1] 1 is a perspective view illustrating an appearance of a machine tool according to an embodiment. [Diagram 2] FIG. 2 is a hardware configuration diagram of a machine tool. [Diagram 3] FIG. 2 is a perspective view showing an internal structure of a machine tool. [Figure 4] FIG. 2 is a front view showing the internal structure of the storage chamber. [Diagram 5] 5 is a cross-sectional view taken along the line AA in FIG. 4, showing the configuration of the mist collector. [Figure 6] 5 is a view taken in the direction of the arrow B in FIG. 4. [Figure 7] 7 is a cross-sectional view taken along the line CC in FIG. 6. [Figure 8] FIG. 2 is a diagram showing the arrangement of a mist collector. [Figure 9] FIG. 4 is a diagram showing a maintenance structure of the mist collector. [Figure 10] FIG. 4 is a diagram showing a maintenance structure of the mist collector. [Figure 11] FIG. 4 is a diagram showing a filter replacement structure of the mist collector. [Figure 12]FIG. 4 is a diagram showing a filter replacement structure of the mist collector. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view illustrating the appearance of a machine tool according to an embodiment. For convenience, in the following description, the up-down direction, the front-rear direction, and the left-right direction when viewed from the front of the machine tool 1 are respectively defined as the X direction, the Y direction, and the Z direction.

[0009] Machine tool 1 is a turning center, which processes a workpiece into a desired shape by appropriately changing tools. A machining chamber 4 is provided inside (inside) a housing 2 of machine tool 1. A machining device that processes the workpiece is provided in machining chamber 4. A control panel 6 for operating the machining device is provided on the side of housing 2.

[0010] A coolant tank 8 for storing coolant to be supplied to the machining chamber 4 is provided adjacent to the housing 2 of the machine tool 1 (see FIG. 3). The machine tool 1 is provided with a mist collector 10 for collecting the coolant that has turned into mist (also called "oil mist") in the machining chamber 4. In this embodiment, space saving of the machine tool 1 is achieved by devising an arrangement configuration for the mist collector 10. Details thereof will be described below.

[0011] FIG. 2 is a diagram showing the hardware configuration of the machine tool 1. The machine tool 1 includes an information processing device 100, a processing control device 102, and a processing device 104. The processing control device 102 functions as a numerical control unit, and outputs a control signal to the processing device 104 according to a processing program (NC program). The processing device 104 drives a work spindle according to instructions from the processing control device 102, and moves a tool to process the workpiece.

[0012] The machining device 104 includes a work spindle drive unit 110, a tool rest drive unit 112, a coolant supply device 114, and a mist collector drive unit 116. In this embodiment, as described later, a first work spindle and a second work spindle are provided as work spindles capable of holding a workpiece. The work spindle drive unit 110 includes a first spindle drive unit 120 that drives the first work spindle, and a second spindle drive unit 122 that drives the second work spindle. The tool rest drive unit 112 drives a turret-type tool rest that will be described later.

[0013] The coolant supply device 114 supplies coolant to the machining chamber 4. The coolant is used as cutting oil for removing heat and lubricating the tools and workpieces during machining, and is also used as a cleaning liquid for removing chips scattered within the machining chamber 4. The coolant supply device 114 is configured by arranging a coolant discharge part 124, a pump 126, and a control valve 128 in a coolant circulation path (not shown) in addition to the above-mentioned coolant tank 8.

[0014] The machining chamber 4 is provided with a plurality of coolant discharge parts 124. The coolant discharge parts 124 include a nozzle for discharging coolant and an actuator for driving the nozzle, and discharge the coolant toward a set target position. The pump 126 draws up the coolant stored in the coolant tank 8 and supplies it to the coolant discharge parts 124. The control valve 128 includes a plurality of opening / closing valves, and appropriately switches the flow path of the coolant in the coolant circulation path.

[0015] The mist collector driving unit 116 drives the mist collector 10 when the coolant is discharged in the machining chamber 4. The mist collector driving unit 116 includes a motor 60 that drives a fan of the mist collector 10 (described in detail later).

[0016] The information processing device 100 includes an operation panel 6, and outputs a control command to a processing control device 102 based on an operation input by an operator. The information processing device 100 also controls a screen displayed on the monitor of the operation panel 6 in response to the operation input by the operator.

[0017] Each component of the information processing device 100 is realized by hardware including computing units such as a CPU (Central Processing Unit) and various co-processors, storage devices such as memory and storage, and wired or wireless communication lines connecting them, and software stored in the storage devices and supplying processing instructions to the computing units. The computer programs may be configured by device drivers, an operating system, various application programs located at higher layers than those, and libraries that provide common functions to these programs.

[0018] 3 is a perspective view showing the internal structure of the machine tool 1. For ease of explanation, the figure shows a state in which covers (splash guards) on the front and left and right sides of the housing 2 have been removed. The machine tool 1 has a partition wall 12 that divides the space above the bed 3 (base) in the housing 2 into a processing chamber 4 and an accommodation chamber 5.

[0019] The processing device 104 is configured by mounting the first headstock 14, the second headstock 16, the tool rest 18, etc. on the bed 3. The first headstock 14 is accommodated in the accommodation chamber 5, and the second headstock 16 and the tool rest 18 are accommodated in the processing chamber 4. The accommodation chamber 5 is made to be a size necessary and sufficient to accommodate the first headstock 14, since no moving body is provided, and is sufficiently smaller than the processing chamber 4. The first headstock 14 rotatably supports the first work spindle 20. The tip of the first work spindle 20 penetrates the partition wall 12 and is exposed to the processing chamber 4. A chuck capable of holding a work is attached to the tip of the first work spindle 20. The first work spindle 20 is rotationally driven by the first spindle drive unit 120 described above.

[0020] The second headstock 16 rotatably supports the second work spindle 22. The second headstock 16 is covered with a dedicated cover 17 to prevent chips and coolant from entering. The second work spindle 22 is exposed from the cover 17. A chuck capable of holding a work is attached to the tip of the second work spindle 22. The second work spindle 22 is rotationally driven by the second spindle drive unit 122 described above. The second work spindle 22 can be replaced with a tailstock (not shown) as necessary.

[0021] The first work spindle 20 and the second work spindle 22 are disposed so as to face each other coaxially in the Z direction. The first headstock 14 and the second headstock 16 each have a built-in spindle motor for rotating the work spindle. The second headstock 16 can be moved in the Z direction by driving a movement mechanism (not shown). That is, the second headstock 16 can move the second work spindle 22 in a direction to approach or move away from the first work spindle 20, and the distance between the first work spindle 20 and the second work spindle 22 can be adjusted. This movement mechanism is, for example, a screw feed mechanism using a ball screw.

[0022] The tool rest 18 is disposed on the inner side of the second headstock 16 in the depth direction in the machining chamber 4, and functions as a "tool holding section." The tool rest 18 includes a turret base 24 and a turret 26. The turret base 24 has a rotation axis extending in the Z direction, and rotatably supports the turret 26. The turret base 24 is provided with a spindle motor for rotating the turret 26. The turret 26 is provided with a plurality of clamping / unclamping mechanisms (not shown) along its periphery. These clamping / unclamping mechanisms allow a plurality of different types of tools (not shown) to be attached and detached.

[0023] The turret base 24 can be moved in the X, Y, and Z directions by driving a movement mechanism (not shown), and can adjust the positional relationship between the workpieces held by each work spindle and the tool held by the turret 26. This movement mechanism is, for example, a screw feed mechanism using a ball screw.

[0024] With this configuration, the turret 26 is movable in the X, Y, and Z directions. The turret 26 is also rotatable about an axis extending in the Z direction, thereby making it possible to switch the tool used for machining. In other words, the turret 26 moves relatively in three orthogonal axial directions with respect to a workpiece supported by one or both of the first workpiece spindle 20 and the second workpiece spindle 22, and can perform cutting or turning of the workpiece with a tool.

[0025] The above-mentioned coolant discharge part 124 is provided at a predetermined position in the machining chamber 4 (not shown). The coolant discharge part 124 discharges coolant toward the tool when machining the workpiece, and also discharges coolant to wash away chips scattered in the machining chamber 4. Some or all of the tools supported by the turret 26 may be provided with the function of a so-called through-spindle coolant device. That is, an internal passage for circulating the coolant may be provided in the tool, and the internal passage may be connected to a coolant circulation path. An outlet that forms one end of the internal passage and discharges the coolant is provided at the tip of the tool. By discharging the coolant from the tip of the tool in this way during machining, it is possible to improve machining accuracy, shorten machining time, extend the life of the tool, and improve chip discharge performance.

[0026] The coolant discharged from the coolant discharge portion 124 turns into mist inside the machining chamber 4, and if it is discharged outside the machine as is, it will cause contamination inside the factory. For this reason, the machine tool 1 is provided with a mist collector 10 for collecting this oil mist. The mist collector 10 is disposed in the space above the first headstock 14 in the accommodation chamber 5. The partition wall 12 is provided with a mist inlet 28 that opens toward the machining chamber 4. In the accommodation chamber 5, a pipe 30 is provided that connects the suction port 10a of the mist collector 10 and the mist inlet 28.

[0027] A cover 32 is provided on the side of the partition wall 12 to cover the mist inlet 28 from above. The cover 32 opens downward and prevents the coolant discharged from the coolant discharge portion 124 from directly entering the mist inlet 28. When the mist collector 10 is driven, the oil mist in the machining chamber 4 is taken into the mist inlet 28 and guided to the suction port 10a through the piping 30. The oil mist is collected inside the mist collector 10, and purified air is discharged from the exhaust port 10b.

[0028] FIG. 4 is a front view showing the internal structure of the storage chamber 5. As shown in FIG. In the accommodation chamber 5, a support column 40 is erected on the bed 3 in addition to the first headstock 14. A table 42 is provided on the upper end of the support column 40, and the mist collector 10 is placed on the table 42. The first headstock 14 is disposed on the front side in the depth direction of the accommodation chamber 5, and the support column 40 is disposed on the rear side in the depth direction. Since the table 42 is provided to extend from the upper end of the support column 40 to the front side, the mist collector 10 is supported in a cantilever manner by the support column 40 and is disposed on the front side of the support column 40 in the depth direction.

[0029] The mist collector 10 is disposed relatively further back than the first headstock 14. The exhaust port 10b of the mist collector 10 communicates with the outside of the machine via an opening 34 provided in the housing 2. That is, the opening 34 is provided at a position in the housing 2 corresponding to the exhaust port 10b. The piping 30 extends from the intake port 10a of the mist collector 10 and curves slightly forward to be connected to the mist intake port 28. The piping 30 is disposed above the first headstock 14. In this manner, the mist collector 10 and the piping 30 are disposed by effectively utilizing the space above the first headstock 14 in the accommodation chamber 5.

[0030] FIG. 5 is a cross-sectional view taken along the line AA in FIG. The mist collector 10 is configured by housing a fan 52, a first filter 54, and a second filter 56 in a case 50. A flow passage 58 for air introduced from an intake port 10a is formed in the case 50. The flow passage 58 connects the intake port 10a and the exhaust port 10b. The first filter 54, the fan 52, and the second filter 56 are arranged from the upstream side of the flow passage 58. The second filter 56 is arranged near the exhaust port 10b. A motor 60 that rotates and drives the fan 52 is arranged in the case 50. The fan 52 and the first filter 54 are coaxially assembled to a rotating shaft 62 of the motor 60.

[0031] The first filter 54 and the second filter 56 each have a mesh of a predetermined coarseness, and sequentially collect the oil mist contained in the air introduced from the mist collector 10. The second filter 56 has a finer mesh than the first filter 54, and collects oil mist with a small particle diameter that could not be captured by the first filter 54. A hood 64 (exhaust port cover) is detachably attached to the case 50 so as to surround the exhaust port 10b. Note that the configuration of such a mist collector 10 is publicly known, as described in, for example, Patent Document 2 (Japanese Patent No. 7144631), and therefore a detailed description thereof will be omitted.

[0032] When the motor 60 is driven to operate the mist collector 10, the fan 52 and the first filter 54 rotate around their axes. As a result, air containing oil mist from the machining chamber 4 is sucked in through the mist inlet 28 (see FIG. 4) and guided through the piping 30 to the suction port 10a of the mist collector 10. At this time, the air introduced into the case 50 through the suction port 10a has oil mist separated from it as it passes through the first filter 54, and is guided downstream via the fan 52 (see the two-dot chain line arrow). The oil mist separated by the first filter 54 is returned to the machining chamber 4 through a drain (not shown), and then collected in the coolant tank 8.

[0033] The air that has passed through the first filter 54 has remaining oil mist removed by passing through the second filter 56. The air that has been purified by removing the oil mist is discharged outside the machine through the exhaust port 10b.

[0034] FIG. 6 is a view taken in the direction of the arrow B in FIG. The mist inlet 28 is disposed on the front side in the depth direction of the machining chamber 4. That is, the mist inlet 28 is provided at the upper part of the front side in the depth direction (Y direction) of the partition wall 12. The mist inlet 28 is located above (directly above) the first workpiece spindle 20 exposed to the machining chamber 4.

[0035] The cover 32 has a necessary and sufficient size to cover the mist inlet 28, and is disposed at a position that avoids the interference range (area surrounded by a two-dot chain line) of the tool rest 18. A recessed space 70 is formed in the partition wall 12 to prevent interference when the tool rest 18 moves in the X direction (see FIG. 3).

[0036] 4, the suction port 10a of the mist collector 10 is disposed at a relatively higher position than the mist inlet 28. This causes the piping 30 to bend slightly downward from the suction port 10a toward the mist inlet 28. As a result, the coolant liquefied in the piping 30 can be easily returned to the machining chamber 4. In other words, the coolant droplets can easily flow from the mist inlet 28 to the machining chamber 4.

[0037] FIG. 7 is a cross-sectional view taken along the line CC in FIG. The tip of the piping 30 penetrates the opening 72 of the partition wall 12. The tip of the piping 30 expands slightly in diameter and protrudes into the machining chamber 4, and its open end forms the mist inlet 28. Meanwhile, the cover 32 has a cover body 80 that covers the mist inlet 28 from above and from the sides, and a shielding portion 82 provided on the inside of the cover body 80. The shielding portion 82 extends obliquely from the surface of the cover body 80 facing the mist inlet 28 toward below the mist inlet 28. This prevents coolant that splashes below the machining chamber 4 from bouncing back and directly entering the mist inlet 28.

[0038] The upper surface of the cover body 80 is an inclined surface that slopes downward, and is configured so that droplets of coolant adhering to the upper surface can fall below the machining chamber 4. The cover body 80 opens downward, and a slit 84 of an appropriate size is provided on the base end side of the side surface. The slit 84 is located closer to the base end side of the piping 30 than the mist inlet 28. This prevents the coolant from flowing directly into the mist inlet 28, while ensuring the area of ​​the inlet that guides the oil mist.

[0039] Fig. 8 is a diagram showing the arrangement of the mist collector 10. Fig. 8(A) shows a state in which the hood 64 is attached, and Fig. 8(B) shows a state in which the hood 64 is removed. For ease of explanation, Fig. 8 shows a state in which the front cover of the housing 2 is removed.

[0040] As shown in Fig. 8(A), the main body of the mist collector 10 (i.e., functional parts such as the fan 52 and filters 54, 56) is housed in the housing chamber 5, and only the hood 64 protrudes to the outside of the housing 2. The hood 64 regulates the direction of the air discharged from the mist collector 10 in the factory, for example, preventing the air from being directed toward workers. By having only the hood 64 protrude in this way, the protruding portion from the housing 2 can be made small.

[0041] Depending on the installation location and installation mode in the factory, the hood 64 can be removed. As shown in Fig. 8(B), by removing the hood 64, the structure protruding from the surface of the housing 2 can be reduced, thereby realizing space saving.

[0042] Figures 9 and 10 are diagrams showing the maintenance structure of the mist collector 10. Figure 9 shows the support structure of the mist collector 10. Figures 9(A) and (B) are perspective views seen from above, and Figures 9(C) and (D) are perspective views seen from below. Figures 10(A) to (C) show a method of removing the mist collector 10 for maintenance.

[0043] 9(A) and (B), the table 42 is configured by assembling a bracket 42a and an oil pan 42b one above the other. The bracket 42a is supported in a cantilevered manner by the support 40. The bracket 42a functions as a "fixed table" that is fixed to the upper end of the support 40, and the oil pan 42b functions as a "movable table" that is slidable in the Z direction relative to the bracket 42a.

[0044] As also shown in Figures 9(C) and (D), the bracket 42a is formed with three rows of guide holes 43 extending in the Z direction. A plurality of screw holes 44 are provided in the lower surface of the oil pan 42b at positions facing the guide holes 43 (Figure 9(D)). The bracket 42a and the oil pan 42b are fastened together by attaching a plurality of screws 45 from the lower surface side of the bracket 42a (Figure 9(C)). In this embodiment, one screw 45 is provided at the tip end side in the sliding direction and two screws 45 are provided at the base end side in the sliding direction along each guide hole 43. The plurality of guide holes 43 and the plurality of screws 45 form a "slide mechanism."

[0045] Specifically, the oil pan 42b can be slid relative to the bracket 42a by removing the screw 45 on the tip side in the sliding direction and loosening the screw 45 on the base end side in the sliding direction (FIG. 9(D)). The oil pan 42b can move in the Z direction with the mist collector 10 placed on it. When the oil pan 42b moves to the end point in the sliding direction, the tip of the guide hole 43 becomes a stopper and engages the screw 45 on the base end side in the sliding direction, and the oil pan 42b stops. Therefore, the oil pan 42b and the mist collector 10 will not fall off.

[0046] As shown in Figures 10(A) to (C), when removing the mist collector 10, a worker first removes the cover 11 provided on the lower half of the side cover 2b (splash guard), removes the piping 30 from the mist collector 10, and then removes and loosens some of the multiple screws 45 mentioned above.

[0047] Next, the oil pan 42b on which the mist collector 10 is placed is slid and pulled out from the housing 2 through the opening 34 of the side cover 2b (splash guard), and the mist collector 10 is removed, enabling maintenance. At that time, since there is no need to remove the entire front cover 2a (splash guard) of the housing 2, the work can be easily performed. In a modified example, the upper part of the front cover 2a (including the opening 34) may be removed so that the oil pan 42b can be pulled out.

[0048] Figures 11 and 12 are diagrams showing a filter replacement structure of the mist collector 10. Figures 11(A) to (C) show an attachment structure between the case 50 and the hood 64. Figures 12(A) and (B) show an opening and closing structure of the exhaust port 10b by the hood 64.

[0049] As shown in Fig. 11(A), the hood 64 is attached to the case 50 so as to surround the exhaust port 10b. As shown in Fig. 11(B), the hood 64 is attached near the exhaust port 10b via a hinge 64a, and can open and close the exhaust port 10b in the form of an opening and closing door. The hood 64 has a plurality of straightening plates 64b on the top and bottom. The air discharged from the mist collector 10 is straightened by these straightening plates 64b in an obliquely upward direction and is discharged outside the machine.

[0050] 11(C), the exhaust port 10b is opened by opening the hood 64. In this state, the second filter 56 can be removed. That is, such an opening and closing structure of the hood 64 allows the second filter 56 to be easily replaced.

[0051] As shown in FIGS. 12(A) and (B), since the mist collector 10 is exposed from the opening 34 of the side cover 2b, the hood 64 can be easily opened and closed from the outside of the housing 2.

[0052] In this embodiment, the hood 64 is attached to the case 50 in an openable and closable manner. However, the hood 64 may be attached to the case 50 in a detachable manner.

[0053] The machine tool has been described above based on the embodiment. In this embodiment, a first headstock 14 and a second headstock 16 are provided as headstocks that support the workpiece spindle. The space above the bed 3 in the housing 2 is divided into a machining chamber 4 and an accommodation chamber 5 by a partition wall 12, with the first headstock 14 disposed in the machining chamber 4 and the second headstock 16 disposed in the accommodation chamber 5. Since chips and coolant from the machining chamber 4 do not scatter into the accommodation chamber 5, there is no need to provide a dedicated cover for the first headstock 14.

[0054] Since the first headstock 14 is fixed to the bed 3, the accommodation chamber 5 is made large enough to accommodate the first headstock 14, but there is an empty space above the first headstock 14. In this embodiment, this empty space is effectively utilized to accommodate the mist collector 10 within the housing 2. By arranging the mist collector 10 and the piping 30 in the space above the first headstock 14 and reducing the number of structures installed or protruding outside the machine, it is possible to achieve space saving for the machine tool 1 while maintaining the functionality of the mist collector 10.

[0055] In particular, by erecting the support pillar 40 at the back of the accommodation chamber 5 and supporting the mist collector 10 in a cantilevered manner toward the front, the mist collector 10 can be disposed above the first headstock 14 without interfering with the first headstock 14. Since the mist collector 10 and the first headstock 14 are separated, it is possible to prevent or suppress the vibrations caused when the mist collector 10 is driven from being transmitted to the first headstock 14. Therefore, the driving of the mist collector 10 does not affect the machining accuracy of the workpiece.

[0056] Meanwhile, in the machining chamber 4, the mist inlet 28 is disposed by effectively utilizing the space above the first workpiece spindle 20. This also makes it possible to prevent interference between the cover 32 of the mist inlet 28 and the tool rest 18.

[0057] [Variations] In the above embodiment, the first work spindle 20 and the second work spindle 22 are provided as the work spindles, and are arranged opposite to each other in the axial direction. In a modified example, a configuration without the second work spindle 22 may be adopted. A tailstock may be arranged in place of the second work spindle 22.

[0058] In the above embodiment, the machine tool 1 has been described as a turning center, but it may be a multi-tasking machine that combines the functions of a turning center and a machining center. It may also be a turning center-based multi-tasking machine that is capable of milling and turning.

[0059] When the machine tool 1 is used as a multi-tasking machine, a tool spindle is provided instead of a turret (tool rest). The tool spindle functions as a "tool holder" and is rotatably supported by the spindle head. The spindle head is driven in the X, Y, and Z directions by a moving mechanism. The multi-tasking machine is further provided with a tool storage unit and a tool changer. The tool storage unit includes a magazine that stores tools. The tool changer includes an ATC (Automatic Tool Changer), and takes out a tool from the tool storage unit and changes it for the tool in the tool spindle according to a change command from the machining control device 102.

[0060] The present invention is not limited to the above-mentioned embodiment and modified examples, and the components can be modified without departing from the gist of the present invention. Various inventions can be formed by appropriately combining multiple components disclosed in the above-mentioned embodiment and modified examples. In addition, some components can be deleted from all the components shown in the above-mentioned embodiment and modified examples. [Explanation of symbols]

[0061] 1 machine tool, 2 housing, 3 bed, 4 machining chamber, 5 storage chamber, 6 operation panel, 8 coolant tank, 10 mist collector, 12 bulkhead, 14 first headstock, 16 second headstock, 17 cover, 18 tool rest, 20 first work spindle, 22 second work spindle, 26 turret, 28 mist inlet, 30 piping, 32 cover, 40 support, 42 table, 50 case, 52 fan, 54 first filter, 56 second filter, 58 flow passage, 60 motor, 64 hood, 82 shielding section, 100 information processing device, 102 machining control device, 104 machining device, 124 coolant discharge section.

Claims

1. A machine tool having a partition wall that divides a space above a base in a housing into a processing chamber in which machining is performed by a tool and an accommodation chamber in which a headstock is accommodated, a workpiece spindle rotatably supported by the headstock and having a tip exposed to the machining chamber; a coolant discharge unit that is disposed in the machining chamber and discharges coolant when machining a workpiece supported by the workpiece spindle; a mist collector disposed in a space above the headstock in the accommodation chamber and having an outlet opening on a side surface of the housing; A mist intake port provided in the partition wall and opening toward the processing chamber; A pipe is disposed in the accommodation chamber and connects a suction port of the mist collector and the mist inlet; A machine tool comprising:

2. A support pillar is provided on the base in the accommodation chamber separately from the headstock, The machine tool of claim 1 , wherein the mist collector is supported on the support column.

3. The support pillar is provided on the rear side of the storage chamber in a depth direction, The machine tool according to claim 2 , wherein the mist collector is supported by the support in a cantilever manner and is disposed on a front side of the support in a depth direction.

4. 3. The machine tool according to claim 1, wherein the mist inlet is provided above the workpiece spindle exposed to the machining chamber.

5. The machine tool according to claim 4 , wherein a cover is provided on a side surface of the partition wall in the machining chamber to cover the mist intake port from above and to prevent direct intrusion of the coolant discharged from the coolant discharge portion.

6. A first headstock as the headstock; A first work spindle as the work spindle; a second work spindle disposed opposite to the first work spindle in the processing chamber; a second headstock arranged in the machining chamber to rotatably support the second work spindle and movable in a direction to move the second work spindle closer to or away from the first work spindle; a tool holding section that is disposed on a deeper side in a depth direction than the second headstock in the machining chamber and is capable of holding a tool; Equipped with The machine tool according to claim 4 , wherein the mist inlet is disposed on a front side in a depth direction of the machining chamber.

7. The mist collector is disposed on the rear side of the first headstock in a depth direction, The machine tool according to claim 6 , wherein the piping is disposed above the first headstock.

8. The machine tool according to claim 7 , wherein the suction port of the mist collector is disposed at a relatively higher position than the mist inlet.

9. The mist collector is placed on a table provided at the upper end of the support, The table includes: A fixed table fixed to the support; a movable table on which the mist collector is placed; a slide mechanism formed between the fixed table and the movable table; Including, The machine tool according to claim 2 , wherein the mist collector is configured to be slidably moved to the outside of the housing while being placed on the movable table.

10. An opening is provided in the housing at a position corresponding to an outlet of the mist collector, The mist collector comprises: a case having a flow passage connecting the inlet and the outlet; A fan disposed in the flow passage; a filter disposed in the flow passage near the outlet; a hood attached to the case so as to surround the exhaust port; Including, the hood is attached to the case so as to be capable of opening and closing the exhaust port; The machine tool according to claim 1 , wherein the filter is replaceable with the exhaust port open.

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