Fog collector and machine tool

Abstract

A technique for preventing leakage of mist from a gap (GA) in a mist collector is provided. A mist collector (40) for collecting mist generated due to machining of a workpiece is provided with a rotating filter (56) for capturing the mist, a driving section (112M) for rotationally driving the rotating filter (56) with the center of the rotating filter (56) as a rotation axis, and a housing (52) having a cylindrical portion (55B). The housing (52) houses the rotating filter (56) in the cylindrical portion (55B). The radial direction of the rotating filter (56) is orthogonal to the inner surface of the cylindrical portion (55B). The housing (52) is provided with a flow-in prevention mechanism (60) for preventing inflow of mist into a gap (GA) between the cylindrical portion (55B) and the rotating filter (56).

Description

Technical Field

[0001] This disclosure relates to fog collectors and machine tools. Background Technology

[0002] Heat is generated when a machine tool processes a workpiece using a cutting tool. To suppress this heat, the machine tool sprays coolant onto the workpiece. At this time, the coolant vaporizes, producing mist inside the machine tool. Regarding the technology for collecting this mist, Japanese Patent Publication No. 6836683 (Patent Document 1) discloses a machine tool equipped with a mist collector.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 6836683 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] Fog collected by a fog collector can sometimes leak out of the machine tool through gaps within the fog collector. Therefore, a technology is desired to prevent fog leakage from these gaps. It should be noted that the machine tool disclosed in Patent Document 1 does not prevent fog leakage from the gaps within the fog collector.

[0008] Solution for solving the problem

[0009] In one example of this disclosure, a mist collector is provided for collecting mist generated during the processing of a workpiece. The mist collector includes: a rotary filter for capturing the mist; a drive unit for rotating the rotary filter about its center as a rotation axis; and a housing having a cylindrical portion. The housing houses the rotary filter within the cylindrical portion. The radial direction of the rotary filter is orthogonal to the inner surface of the cylindrical portion. The housing is provided with an anti-flow mechanism to prevent the mist from flowing into the gap between the cylindrical portion and the rotary filter.

[0010] In one embodiment of this disclosure, the aforementioned anti-inflow mechanism includes an annular portion disposed on the inner surface of the cylindrical portion, opposite to the aforementioned gap. The annular portion is positioned downstream of the rotary filter in the direction of airflow through the rotary filter.

[0011] In one example of this disclosure, the radial inner diameter of the annular portion is shorter than the radial outer diameter of the rotary filter.

[0012] In one example of this disclosure, the rotary filter includes: an edge portion; and a filter portion fixed to the edge portion. The radial inner diameter of the annular portion is shorter than the radial outer diameter of the edge portion.

[0013] In one example of this disclosure, the radial inner diameter of the annular portion is longer than the radial inner diameter of the edge portion.

[0014] In one example of this disclosure, the aforementioned anti-inflow mechanism has a cylindrical anti-inflow wall. The cylindrical anti-inflow wall is configured such that its central axis overlaps with the central axis of the cylindrical portion, and is positioned upstream of the rotary filter in the direction of airflow through the rotary filter.

[0015] In one example of this disclosure, the radial outer diameter of the aforementioned preventive wall is shorter than the radial outer diameter of the aforementioned rotary filter.

[0016] In other examples of this disclosure, the machine tool includes: a cover that divides the area into processing zones; and a fog collector as described in any one of claims 1 to 7. The fog collector is connected to the cover to collect fog generated within the processing area.

[0017] The above-described objects, features, aspects, and advantages of the invention, as well as other objects, features, aspects, and advantages, will become apparent from the following detailed description of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a diagram showing the appearance of the machine tool.

[0019] Figure 2 It is a diagram showing the situation inside the machine tool.

[0020] Figure 3 From and Figure 2 Diagrams showing the situation inside the machine tool from different perspectives.

[0021] Figure 4 This is a diagram showing an example of the configuration of a drive mechanism in a machine tool.

[0022] Figure 5 It is shown Figure 1 A cross-sectional view of the fog collector shown.

[0023] Figure 6 It is Figure 5 An enlarged view of the periphery of the rotating filter shown.

[0024] Figure 7 This is a diagram showing the rotating filter and the annular section from above.

[0025] Figure 8 It is along Figure 7 A cross-sectional view of line VIII-VIII in the diagram.

[0026] Figure 9 This is a diagram showing the rotating filter and the protective wall from above.

[0027] Figure 10 It is along Figure 9 A cross-sectional view of the V-V line. Detailed Implementation

[0028] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals are used to denote the same parts and components. Their names and functions are also the same. Therefore, detailed descriptions of these parts and components will not be repeated. It should be noted that the various embodiments and modifications described below can be appropriately and selectively combined.

[0029] <A. Appearance of Machine Tool 100>

[0030] Reference Figure 1 The machine tool 100 of the embodiment will be described. Figure 1 This is a diagram showing the appearance of machine tool 100.

[0031] The term "machine tool" as used in this specification encompasses various devices capable of machining workpieces. In this specification, a horizontal machining center is used as an example of machine tool 100, but machine tool 100 is not limited to this. For example, machine tool 100 could also be a vertical machining center. Alternatively, machine tool 100 could be a lathe, an additive manufacturing machine, or other cutting or grinding machinery. Furthermore, machine tool 100 could also be an integrated machine composed of these types of machinery.

[0032] like Figure 1 As shown, the machine tool 100 includes a mist collector 40 and a shroud 130. The shroud 130, also referred to as a splash guard, forms the exterior of the machine tool 100 and divides the machining area AR (see reference) that forms the workpiece W. Figure 2 ).

[0033] The mist collector 40 is connected to the hood 130 to collect mist generated within the machining area AR, preventing the mist from leaking outside the machine tool 100. It should be noted that the location of the mist collector 40 is not limited to the ceiling of the machine tool 100. For example, the mist collector 40 may also be located on the side of the machine tool 100. Furthermore, the mist collector 40 may be located in a different location from the machine tool 100. In this case, the mist collector 40 is connected to the machine tool 100 via piping or the like.

[0034] <B. Internal Structure of Machine Tool 100>

[0035] Next, refer to Figure 2 and Figure 3 The internal structure of machine tool 100 is described. Figure 2 This is a diagram showing the situation inside machine tool 100. Figure 3 From and Figure 2 A diagram showing the situation inside the machine tool 100 from different directions.

[0036] like Figure 2 and Figure 3 As shown, the machine tool 100 includes, inside: a coolant ejection section 125, a spindle head 131, a cutting tool 134, a worktable 136, and a chip conveyor 150. The spindle head 131 includes a spindle 132 and a housing 133.

[0037] For ease of explanation, the axial direction of the main shaft 132 will be referred to as the "Z-axis direction". The direction of gravity will be referred to as the "Y-axis direction". The direction orthogonal to both the Y-axis and Z-axis directions will be referred to as the "X-axis direction".

[0038] An opening 135 is formed in the top of the cover 130. The aforementioned fog collector 40 is configured to cover the opening 135. Thus, the fog collector 40 collects fog from the processing area AR through the opening 135.

[0039] The ejector section 125 is located inside the machine tool 100 and ejects coolant to discharge chips generated during the machining of workpiece W to the chip conveyor 150. The ejector section 125 consists of one or more ejection mechanisms. Figure 2 and Figure 3 In the example shown is the ejection mechanism 125A, 125B.

[0040] A coolant ejection mechanism 125A is provided on the spindle head 131. The ejection mechanism 125A can be either a side-through configuration, where coolant is ejected from the spindle end face through the housing 133 of the spindle head 131, or a center-through configuration, where coolant is ejected from the tip of the tool held in the spindle head 131 through the spindle center. The ejection mechanism 125A primarily removes chips adhering to the spindle 132 and tool 134, or suppresses heat generation at the workpiece's machining points, by ejecting coolant towards the machining points of the workpiece. The ejection mechanism 125A is configured to be driven in a rotational direction with the X-axis as the rotation axis (i.e., the A-axis direction), and also configured to be driven in a rotational direction with the Z-axis as the rotation axis (i.e., the C-axis direction). Thus, the ejection mechanism 125A changes the ejection direction of the coolant in the A-axis and C-axis directions.

[0041] The ejection mechanism 125B is located above the ejection mechanism 125A. The ejection mechanism 125B is, for example, installed in the roof portion of the housing 130. The ejection mechanism 125B primarily ejects coolant from the housing 130 into the entire machining area AR. Consequently, chips generated during the machining of the workpiece W are discharged from the machining area AR to the chip conveyor 150.

[0042] The spindle 132 is located inside the housing 133. A cutting tool for machining the workpiece W is mounted on the spindle 132. Figure 2 and Figure 3 In the example, the cutting tool 134 used in the milling of workpiece W is mounted on the spindle 132.

[0043] The chip conveyor 150 is a mechanism for discharging chips generated by the machining of workpiece W out of the machining area AR.

[0044] <C. Drive mechanism of machine tool 100>

[0045] Next, refer to Figure 4 The various drive mechanisms in machine tool 100 are described. Figure 4 This is a diagram showing an example of the configuration of the drive mechanism in the machine tool 100.

[0046] like Figure 4 As shown, the machine tool 100 includes: a control unit 50, a pump 109, motor drivers 111A, 111R, 111X to 111Z, motors 112A, 112R, 112X to 112Z, a moving body 113, ejection mechanisms 125A and 125B, a spindle head 131, a cutting tool 134, and a worktable 136.

[0047] The term "control unit 50" as used in this specification refers to the device that controls the machine tool 100. The configuration of the control unit 50 is arbitrary. The control unit 50 can be composed of a single control unit or multiple control units. Figure 4 In this example, the control unit 50 consists of a CPU unit 20, which is a PLC (Programmable Logic Controller), and a CNC (Computer Numerical Control) unit 30. The CPU unit 20 and the CNC unit 30 communicate with each other via a communication path B (e.g., a fieldbus or LAN cable).

[0048] CPU unit 20 controls various units within machine tool 100 according to a pre-designed PLC program. This PLC program is described, for example, using a ladder diagram program.

[0049] As an example, CPU unit 20 controls motor driver 111M within fog collector 40 according to a PLC program. Motor driver 111M receives input from CPU unit 20 regarding the target rotational speed of motor 112M to control motor 112M. This controls the on / off switching of the fog collector 40's drive and the amount of fog drawn by the fog collector 40. It should be noted that motor 112M can be an AC motor, stepper motor, servo motor, or other types of motor.

[0050] As another example, the CPU unit 20 controls the pump 109 according to the PLC program, thereby controlling the spraying of coolant by the spraying section 125. This controls the on / off switching of coolant spraying and the amount of coolant sprayed.

[0051] As another example, CPU unit 20 controls motor driver 111A according to a PLC program. Motor driver 111A receives input from CPU unit 20 regarding the target rotational speed of motor 112A to control motor 112A. This controls the on / off switching of the chip conveyor 150 drive and the conveying speed of chips based on the chip conveyor 150. It should be noted that motor 112A can be an AC motor, stepper motor, servo motor, or other types of motor.

[0052] Based on the machining start command received from the CPU unit 20, the CNC unit 30 begins executing a pre-designed machining program. This machining program is described, for example, using an NC (Numerical Control) program. The CNC unit 30 controls the motor drivers 111R, 111X to 111Z according to the machining program to machine the workpiece W fixed to the worktable 136.

[0053] The motor driver 111R receives the target rotational speed input sequentially from the CNC unit 30 to control the motor 112R. The motor 112R drives the spindle 132 to rotate around the Z-axis. The motor 112R can be an AC motor, a stepper motor, a servo motor, or other types of motor.

[0054] When motor 112R is a servo motor, motor driver 111R calculates the actual rotational speed of motor 112R based on feedback signals from an encoder (not shown) used to sense the rotational angle of motor 112R. Then, motor driver 111R increases the rotational speed of motor 112R if the calculated actual rotational speed is less than the target rotational speed, and decreases the rotational speed of motor 112R if the calculated actual rotational speed is greater than the target rotational speed. In this way, motor driver 111R receives feedback on the rotational speed of motor 112R sequentially, thereby bringing the rotational speed of motor 112R closer to the target rotational speed.

[0055] Motor driver 111X receives target position inputs sequentially from CNC unit 30 to control motor 112X. Motor 112X feeds the moving body 113, on which spindle head 131 is mounted, via a ball screw (not shown), moving spindle 132 to any position in the X direction. The control method of motor 112X by motor driver 111X is the same as that of motor driver 111R, and therefore will not be described again. It should be noted that motor 112X can be an AC motor, stepper motor, servo motor, or other types of motor.

[0056] Motor driver 111Y receives target position inputs sequentially from CNC unit 30 to control motor 112Y. Motor 112Y feeds the moving body 113, on which spindle head 131 is mounted, via a ball screw (not shown), moving spindle 132 to any position in the Y direction. The control method of motor 112Y by motor driver 111Y is the same as that of motor driver 111R, and therefore will not be described again. It should be noted that motor 112Y can be an AC motor, stepper motor, servo motor, or other types of motor.

[0057] Motor driver 111Z receives target position inputs sequentially from CNC unit 30 to control motor 112Z. Motor 112Z feeds the moving body 113, on which spindle head 131 is mounted, via a ball screw (not shown), moving spindle 132 to any position in the Z direction. The control method of motor 112Z by motor driver 111Z is the same as that of motor driver 111R, and therefore will not be described again. It should be noted that motor 112Z can be an AC motor, stepper motor, servo motor, or other types of motor.

[0058] <D. Internal structure of fog collector 40>

[0059] Next, refer to Figure 5 The internal structure of the fog collector 40 is described. Figure 5 It is shown Figure 1 A cross-sectional view of the fog collector 40 shown.

[0060] The mist collector 40 includes a housing 52. The housing 52 has an opening 135 that functions as an air intake. The mist collector 40 guides mist from the processing area AR into the housing 52 via the opening 135.

[0061] The interior of the housing 52 is divided into a first filtration zone 52A and a second filtration zone 52B. The mist collected from the processing zone AR passes sequentially through the first filtration zone 52A and the second filtration zone 52B.

[0062] The first filtration region 52A is composed of a cylindrical portion 55A and a cylindrical portion 55B. The cylindrical portion 55A and the cylindrical portion 55B are connected. The cylindrical portion 55A and the cylindrical portion 55B are coaxially arranged with axis AX as the central axis.

[0063] Hereinafter, the orthogonal direction of axis AX will also be referred to as "radial". Typically, the radial inner diameter of cylindrical portion 55A is longer than the radial inner diameter of cylindrical portion 55B.

[0064] A shaft 54 ​​is housed in the first filtration area 52A. A rotary filter 56 and a fan 57 are fixed to the shaft 54. The shaft 54 ​​is connected to the aforementioned motor 112M and is configured to rotate about the shaft AX. Thus, the shaft 54 ​​functions as a rotating shaft, rotating in conjunction with the rotary filter 56 and the fan 57.

[0065] A rotary filter 56 is housed in the cylindrical portion 55A of the housing 52. The radial direction of the rotary filter 56 is orthogonal to the inner surface of the cylindrical portion 55A. "Orthogonal" here means not only that it can include 90 degrees, but also approximately 90 degrees. That is, the angle between the radial direction of the rotary filter 56 and the inner surface of the cylindrical portion 55A can be 90 degrees or approximately 90 degrees (e.g., greater than 85 degrees and less than 95 degrees).

[0066] Fan 57 is housed in the cylindrical portion 55B of housing 52. Fan 57 functions as a moving blade for generating airflow through rotary filter 56. That is, by rotating fan 57, mist is guided from machining area AR to rotary filter 56. Rotary filter 56 uses centrifugal force to propel the impacting mist radially outward. Thus, the mist is captured by rotary filter 56. The mist captured by rotary filter 56 is returned to machining area AR of machine tool 100 or to coolant tank (not shown).

[0067] The second filtration zone 52B houses a multi-layer filter 70. Unlike the rotary filter 56, the multi-layer filter 70 is stationary. The multi-layer filter 70 traps mist that passes through the rotary filter 56. Thus, only air is exhausted from the exhaust port 72.

[0068] <E. Fog Inflow Prevention Mechanism>

[0069] Next, refer to Figures 6-10 The mechanism for preventing fog from flowing in is explained.

[0070] Figure 6 It is Figure 5 An enlarged view of the periphery of the rotating filter 56 shown. Figure 6 As shown, the rotary filter 56 is composed of a filter section 58 and an edge section 59. The filter section 58 is held by the edge section 59.

[0071] As described above, the motor 112M, which serves as the drive unit, rotates the rotary filter 56 and the fan 47 around the center of the rotary filter 56. This guides the mist to the rotary filter 56. At this time, the mist may sometimes pass through the gap GA between the cylindrical portion 55B and the rotary filter 56. Therefore, an anti-mist flow mechanism 60 is provided in the housing 52 to prevent mist from flowing into the gap GA. As a result, the mist is less likely to pass through the gap GA and is more reliably captured by the rotary filter 56.

[0072] As the anti-inflow mechanism 60, various labyrinth-type mechanisms capable of preventing fog from passing through the gap GA can be employed. As an example, the anti-inflow mechanism 60 is composed of at least one of an annular portion 61 and an anti-fog wall 63. Hereinafter, the annular portion 61 and the anti-fog wall 63 will be described in detail.

[0073] (E1. Annular portion 61)

[0074] First, referring to the above Figure 6 And refer to Figure 7 and Figure 8 The annular portion 61 will be described. Figure 7 This is a diagram showing the rotating filter 56 and the annular portion 61 from the Y direction. Figure 8 It is along Figure 7 A cross-sectional view of line VIII-VIII in the diagram.

[0075] The annular portion 61 has, for example, a hollow circular plate shape. The annular portion 61 is provided on the inner surface of the cylindrical portion 55B, opposite to the gap GA. Furthermore, the annular portion 61 is positioned downstream of the rotary filter 56 in the direction of airflow through the rotary filter 56. Thus, the annular portion 61 acts as a barrier, making it difficult for mist to pass through the gap GA.

[0076] More specifically, the radial inner diameter of the annular portion 61 is shorter than the radial outer diameter of the rotating filter 56. Therefore, when viewed from the Y direction, the gap GA is completely covered by the annular portion 61, making it difficult for mist to pass through the gap GA.

[0077] Furthermore, the annular portion 61 is configured such that its central axis overlaps with the central axis of the rotary filter 56. In other words, the rotary filter 56 and the annular portion 61 are coaxially arranged with axis AX as their central axis. Typically, the annular portion 61 is arranged parallel to the rotary filter 56.

[0078] For ease of explanation, the radial inner diameter of the edge 59 of the rotary filter 56 will be referred to as the "inner diameter RA". Furthermore, the radial outer diameter of the edge 59 of the rotary filter 56 will be referred to as the "outer diameter RB". Additionally, the radial inner diameter of the annular portion 61 will also be referred to as the "inner diameter RC". Furthermore, the radial outer diameter of the annular portion 61 will also be referred to as the "outer diameter RD". It should be noted that the outer diameter RD of the annular portion 61 is equal to the inner diameter of the cylindrical portion 55B.

[0079] The inner diameter RA of the edge 59 of the rotary filter 56, the outer diameter RB of the edge 59 of the rotary filter 56, the inner diameter RC of the annular portion 61, and the outer diameter RD of the annular portion 61 have the relationship shown in the following formula (1).

[0080] Inner diameter RA < Inner diameter RC < Outer diameter RB < Outer diameter RD……(1)

[0081] More specifically, the inner diameter RC of the annular portion 61 is longer than the inner diameter RA of the edge portion 59 of the rotary filter 56. As a result, when viewed from the Y direction, the annular portion 61 does not overlap with the filter portion 58 of the rotary filter 56, and therefore mist passes through the filter portion 58 of the rotary filter 56 more easily than the gap GA.

[0082] Furthermore, the inner diameter RC of the annular portion 61 is shorter than the outer diameter RB of the edge portion 59 of the rotary filter 56. As a result, when viewed from the Y direction, the gap GA is completely covered by the annular portion 61, making it more difficult for mist to pass through the gap GA.

[0083] Preferably, the rotary filter 56 and the annular portion 61 are positioned close together during the rotation of the rotary filter 56 without colliding with the annular portion 61. Typically, the width in the axial AX direction between the rotary filter 56 and the annular portion 61 is predetermined during the design phase. As an example, the width in the axial AX direction between the rotary filter 56 and the annular portion 61 is the same as or approximately the same as the radial width of the gap GA. Alternatively, the width in the axial AX direction between the rotary filter 56 and the annular portion 61 is longer than the amplitude in the axial AX direction during the rotation of the rotary filter 56, and shorter than the amplitude plus a predetermined width (e.g., 1 mm to 1 cm).

[0084] (E2. Prevent wall 63)

[0085] Next, referring to the above... Figure 6 And refer to Figure 9 and Figure 10 An example of an anti-inflow mechanism 60, namely an anti-inflow wall 63, will be described. Figure 9 This is a diagram showing the rotating filter 56 and the anti-wall 63 from the Y direction. Figure 10 It is along Figure 9 A cross-sectional view of the V-V line.

[0086] The preventive wall 63 is, for example, cylindrical. The preventive wall 63 is configured such that its central axis overlaps with the central axis of the cylindrical portion 55B. In other words, the rotary filter 56 and the preventive wall 63 are coaxially arranged with axis AX as their central axis. Furthermore, the annular portion 61 is arranged parallel to the rotary filter 56. Additionally, the preventive wall 63 is positioned upstream of the rotary filter 56 in the direction of airflow through it. Thus, mist guided from the processing area AR is blocked by the preventive wall 63 and is less likely to pass through the gap GA.

[0087] More specifically, the radial outer diameter of the preventive wall 63 is shorter than the radial outer diameter of the rotary filter 56. Therefore, viewed from the Y direction, the preventive wall 63 is positioned further inside the gap GA, making it less likely for mist to pass through the gap GA. Preferably, the radial inner diameter of the preventive wall 63 is shorter than the radial outer diameter of the rotary filter 56.

[0088] For ease of explanation, the radial inner diameter of the edge 59 of the rotary filter 56 will be referred to as the "inner diameter RA". Furthermore, the radial outer diameter of the edge 59 of the rotary filter 56 will be referred to as the "outer diameter RB". Additionally, the radial inner or outer diameter of the guard wall 63 will also be referred to as the "diameter RE".

[0089] The inner diameter RA of the edge 59 of the rotary filter 56, the outer diameter RB of the edge 59 of the rotary filter 56, and the diameter RE of the anti-wall 63 have the relationship shown in the following formula (2).

[0090] Inner diameter RA < outer diameter RE < outer diameter RB……(2)

[0091] More specifically, the diameter RE of the preventive wall 63 is longer than the inner diameter RA of the edge 59 of the rotary filter 56. As a result, when viewed from the Y direction, the preventive wall 63 is located further outward than the filter section 58 of the rotary filter 56, and mist passes through the filter section 58 of the rotary filter 56 more easily than the gap GA.

[0092] Furthermore, the diameter RE of the preventive wall 63 is shorter than the outer diameter RB of the edge 59 of the rotary filter 56. As a result, the preventive wall 63 is positioned radially inside the gap GA, making it less likely for mist to pass through the gap GA.

[0093] Preferably, the rotating filter 56 and the anti-collision wall 63 are positioned close to each other during the rotation of the rotating filter 56, within a range that prevents collision with the anti-collision wall 63. Typically, the width in the axial AX direction between the rotating filter 56 and the anti-collision wall 63 is predetermined during the design phase. As an example, the width in the axial AX direction between the rotating filter 56 and the anti-collision wall 63 is the same as or approximately the same as the radial width of the gap GA. Alternatively, the width in the axial AX direction between the rotating filter 56 and the anti-collision wall 63 is longer than the amplitude in the axial AX direction during the rotation of the rotating filter 56, and shorter than the amplitude plus a predetermined width (e.g., 1 mm to 1 cm).

[0094] <F. Summary>

[0095] As shown above, the mist collector 40 has a rotary filter 56 in the cylindrical portion 55B of the housing 52. Furthermore, the mist collector 40 has an anti-flow mechanism 60 on the inner surface of the cylindrical portion 55B to prevent mist from flowing into the gap GA between the cylindrical portion 55B and the rotary filter 56. Therefore, mist generated inside the machine tool 100 passes through the rotary filter 56 more easily than the gap GA. As a result, leakage of mist to the outside of the machine tool 100 is prevented.

[0096] The embodiments disclosed herein should be considered illustrative rather than restrictive in all respects. The scope of the invention is shown not by the foregoing description but by the claims, and is intended to include all modifications of the meaning and scope equivalent to the claims.

[0097] Explanation of reference numerals in the attached figures

[0098] 20: CPU unit; 30: CNC unit; 40: Fog collector; 47: Fan; 50: Control unit; 52: Housing; 52A: First filtration area; 52B: Second filtration area; 54: Shaft; 55A: Cylindrical part; 55B: Cylindrical part; 56: Rotary filter; 57: Fan; 58: Filter section; 59: Edge; 60: Anti-flow mechanism; 61: Annular part; 63: Anti-wall; 65: Drainage; 70: Multi-layer filter; 72: Exhaust port; 100: Machine tool; 109: Pump; 111A: Motor driver; 111M: Motor driver; 111R: Motor driver; 111X: Motor driver; 111Y: Motor driver; 111Z: Motor driver; 112A: Motor; 112M: Motor; 112R: Motor; 112X: Motor; 112Y: Motor; 112Z: Motor; 113: Moving body; 125: Ejector section; 125A: Ejector mechanism; 125B: Ejector mechanism; 130: Cover; 131: Spindle head; 132: Spindle; 133: Housing; 134: Tool; 135: Opening; 136: Worktable; 150: Chip conveyor.

Claims

1. A fog collector for collecting fog generated during the processing of a workpiece, the fog collector comprising: A rotating filter is used to capture the fog; A drive unit is configured to drive the rotary filter to rotate about its center as a rotation axis; and A housing having a cylindrical portion, the housing housing receiving the rotary filter within the cylindrical portion, the radial direction of the rotary filter being orthogonal to the inner surface of the cylindrical portion. The housing is provided with an anti-flow mechanism to prevent the mist from flowing into the gap between the cylindrical portion and the rotary filter. The anti-inflow mechanism has a cylindrical anti-inflow wall. The cylindrical anti-filter wall is configured such that its central axis overlaps with the central axis of the cylindrical portion, and is positioned upstream of the rotary filter in the direction of airflow through the rotary filter.

2. The fog collector according to claim 1, wherein, The anti-inflow mechanism includes an annular portion disposed on the inner surface of the cylindrical portion in a manner opposite to the gap. The annular portion is positioned downstream of the rotary filter in the direction of the airflow passing through it.

3. The fog collector according to claim 2, wherein, The radial inner diameter of the annular portion is shorter than the radial outer diameter of the rotating filter.

4. The fog collector according to claim 3, wherein, The rotary filter includes: The edge part; and The filter section is fixed to the edge. The inner diameter of the annular portion in the radial direction is shorter than the outer diameter of the edge portion in the radial direction.

5. The fog collector according to claim 4, wherein, The radial inner diameter of the annular portion is longer than the radial inner diameter of the edge portion.

6. The fog collector according to claim 1, wherein, The radial outer diameter of the preventive wall is shorter than the radial outer diameter of the rotating filter.

7. A machine tool, comprising: The enclosure is used to divide the area into processing zones; and The fog collector as described in any one of claims 1 to 6, The fog collector is connected to the hood to collect the fog generated in the processing area.

Images