JP2002126969A - Machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine tool capable of preventing leakage of chips and a cutting fluid to the outside from clearance between a splash guard, a bed and a cutting fluid storage part of a machine tool and easy in maintenance of the cutting fluid storage part. SOLUTION: A lathe 1 is provided with the bed 5 having a passage surface part arranged so as to flow the cutting fluid 48 falling from a machining part 49, a chip gathering means 55 arranged above the passage surface part of the bed and gathering the chips 47 falling by being generated in the machining part, an outflow part 4 arranged on the bed in a position separate from a machining area and making a recovering material composed of the chips and the cutting fluid 48 flowing in the passage surface part flow outside the bed, the cutting fluid storage part 56 attached outside the bed in the position separate from the machining area and storing the cutting fluid, a chip separating means arranged in the cutting fluid storage part and making the cutting fluid flow in the cutting fluid storage part by separating the chips from the recovering material, and a cutting fluid supply means for supplying the cutting fluid stored only in the cutting fluid storage part to the machining part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool such as a lathe, and more particularly, to preventing chips and cutting fluid from leaking to the outside through gaps between a splash guard, a bed, and a cutting fluid reservoir. For machine tools that can perform

[0002]

2. Description of the Related Art As described in JP-B-62-50257 and JP-A-61-19537, a conventional general machine tool includes a chip conveyor and a cutting oil (coolant). ) Is often provided below the processing area (or a single coolant tank without a chip conveyor).

[0003]

In the machine tools described in the above two publications, the tank is provided so as to be movable with respect to the bed for maintenance of the coolant tank and the like. Requires a gap. For this reason, there is a possibility that chips or cutting oil may leak out of the machine tool through the gap during processing or the like to stain the floor surface, and improvements in safety and environmental friendliness have been desired.

Accordingly, Japanese Utility Model Application Laid-Open No. 62-35750 discloses
Japanese Unexamined Utility Model Publication No. 2-44 and Japanese Utility Model Publication No. Hei 6-32268 disclose various proposals for preventing a cutting oil or the like from leaking from the gap. However,
In the machine tools described in these three publications, the coolant tank for storing the cutting fluid is movable, so that the technology described in Japanese Utility Model Application Laid-Open No. 62-35750 and Japanese Utility Model Application Publication No. It was difficult to completely prevent the oil agent from leaking from the gap. Further, in the technique disclosed in Japanese Utility Model Publication No. 6-32268, the means for lifting the tank is provided, so that the configuration is complicated, and there is a problem regarding the life of the packing for sealing the gap.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and chips and cutting oil leak from a gap between a splash guard, a bed, and a cutting oil reservoir of a machine tool to the outside. Can be prevented,
An object of the present invention is to provide a machine tool that can easily maintain a cutting fluid storage unit and the like.

[0006]

In order to achieve the above-mentioned object, a machine tool according to the present invention supplies a cutting oil to a machining portion of a workpiece in a machining area, and performs relative movement between the workpiece and a tool. In a machine tool that performs processing, a bed having a flow path surface portion disposed at a predetermined height position so that a cutting fluid dropped from the processing site flows, and an upper portion of the flow path surface portion of the bed, and A chip collecting means provided so as to be positioned at least at one end below or below the processing portion, and collecting chip generated and falling at the processing portion; and An outflow portion provided on the bed, for flowing out the collected material composed of the chips and the cutting fluid flowing through the chip surface through the chip collecting means and flowing out of the bed; A cutting fluid storage portion that is attached to the outside of the bed at a position where the cutting fluid is stored, and is provided in the cutting fluid storage portion, and separates the chips from the collected material flowing out from the outflow portion to separate the chips. A cutting oil separating means for causing a cutting fluid to flow into the cutting fluid storing section, and a cutting fluid supplying means for supplying the cutting fluid stored only in the cutting fluid storing section to the processing portion are provided.

[0007] A splash guard is provided on the bed for shielding the processing area and preventing the cutting fluid and the chips from scattering or leaking from the processing area, and the cutting fluid storage portion is provided opposite to the processing area. It is preferably provided on the side. The flow path surface of the bed includes an upper surface of a first wall located below the processing region and an upper surface of a second wall extending from the first wall to the outlet. The upper surface of the first wall is inclined so that the side communicating with the upper surface of the second wall is lower, and the upper surface of the second wall is the first wall.
It is preferable that the outflow portion is inclined so as to be lower than the side of the wall portion communicating with the upper surface.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG.
Is a side view showing a part of a machine tool according to an embodiment of the present invention in a cross section, FIG. 2 is a perspective view showing a part of the machine tool, and FIG. 3 is a cross sectional view showing a part of a coolant tank. is there. As shown in FIGS. 1 to 3, in the present embodiment,
Although the lathe 1 is shown as a machine tool, it may be a machine tool such as a turning center or a grinder. In addition, although the case of the lathe 1 movable in the X-axis and Z-axis directions is shown, a machine tool movable in three orthogonal orthogonal directions may be used. For convenience of explanation, the opening / closing door 3 side and the outflow portion 4 side of the splash guard 2 described later are respectively referred to as the front and the rear of the lathe 1, and are viewed from the front in the left and right direction (FIG.
(A) will be described as the left and right directions of the lathe 1.

First, the lathe 1 will be described. The lathe 1 includes a bed 5, a tool rest 6, and a headstock 7. The bed 5 is formed in a box shape having a hollow portion, and is installed on the floor surface 9 via a leveling means (not shown). The bed 5 includes a rear bed 10 erected on the rear side.
have. The rear bed 10 has a substantially horizontal upper surface 11.
And a front surface 12 which is substantially vertical. The headstock 7 is provided above the front surface 12 of the rear bed 10 and rotatably supports a spindle (not shown). The main shaft is a shaft on which the chuck 15 is attached to the tip and rotates, and the axis CL of the main shaft is horizontal. The chuck 15 grips the workpiece 14 with a plurality of claws 15a. On the upper surface 11 of the rear bed 10, a Z-axis guide surface 16 is formed. Z-axis guide surface 16
Extends in the Z-axis direction (direction orthogonal to the paper surface in FIG. 1) parallel to the axis CL of the main shaft, and is substantially horizontal. The tool rest 6 is guided by the Z-axis guide surface 16 and moves in the Z-axis direction, and is at least movable in the X-axis direction (vertical direction) orthogonal to the Z-axis direction. The tool post 6 is provided with one or a plurality of tools 18 and 28.

On the upper surface 11 of the rear bed 10, a pair of parallel Z-axis guide rails 19 are provided in the Z-axis direction. A saddle 20 is arranged above the rear bed 10. On the lower surface of the saddle 20, slide bodies 21 and
1 is fixed. The linear motion rolling guides composed of the two Z-axis guide rails 19 and the slide bodies 21 and 21 are arranged horizontally and extended in the Z-axis direction to form the Z-axis guide surface 16. The saddle 20 has a Z-axis guide surface 16.
And can be moved in the Z-axis direction. Between the two Z-axis guide rails 19, a screw shaft 22 of a Z-axis ball screw is arranged in parallel with the Z-axis guide rail 19. A nut (not shown) fixed to the saddle 20 is screwed into the screw shaft 22. The screw shaft 22 is driven to rotate in the forward and reverse directions by a Z-axis servomotor (not shown). Driven by the Z-axis servo motor, the screw shaft 22
Is rotated, the saddle 20 to which the nut is fixed,
It is guided and supported by the Z-axis guide surface 16 and reciprocates in the Z-axis direction. The movement of the saddle 20 is movement of the tool rest 6 in the Z-axis direction with respect to the workpiece 14.

On the front surface of the saddle 20, a pair of parallel X-axis guide rails (not shown) are provided in the X-axis direction. The two X-axis guide rails are arranged vertically and extend in the X-axis direction. A slide body (not shown) is fixed to the cross slide (transverse slide) 24. The X-axis guide rail and the slide main body constitute a linear motion rolling guide, and constitute an X-axis guide surface 25. The cross slide 24 is guided by the X-axis guide surface 25 and moves in the X-axis direction. A tool rest main body 26 is fixed to the front surface of the cross slide 24. Tool post body 26
, A turret 27 is provided so as to be able to turn around an axis CL1 parallel to the Z-axis direction. Tool post body 2
The tool rest 6 is constituted by the turret 27 and the like. A plurality of tools 18, 28 and the like are radially mounted on the turret 27. A screw shaft (not shown) of an X-axis ball screw is provided between the two X-axis guide rails.
It is arranged parallel to the axis guide rail. On the screw shaft,
A nut (not shown) fixed to the cross slide 24 is screwed. The screw shaft is driven to rotate in the forward and reverse directions by an X-axis servomotor (not shown) attached to the saddle 20. When the screw shaft is rotated by being driven by the X-axis servomotor, the cross slide 24 to which the nut is fixed is guided and supported by the X-axis guide surface 25 and reciprocates in the X-axis direction. The movement of the cross slide 24 is movement of the tool rest 6 in the X-axis direction with respect to the workpiece 14. A spindle is rotatably supported by the headstock 7. The spindle is
The workpiece 14 is rotated while the workpiece 14 is gripped by the claws 15a of the chuck 15 provided at the tip. The spindle is driven to rotate by a spindle motor (not shown).

The lathe 1 has a splash guard 2 for shielding the processing area 45. When the workpiece 14 is machined with the tool 18 or 28 of the tool rest 6, the splash guard 2 causes the chips 47 and the cutting oil (coolant) 48 in the machining area 45 to become scattered objects and become outside the lathe 1. It is provided in order to prevent scattering or leakage. The front side of the processing area 45 can be opened and closed by the door 3. The lathe 1 having the above-described configuration supplies the cutting oil 48 to the processing portion 49 of the workpiece 14 in the processing area 45, rotates the workpiece 14, and moves the workpiece 14 and the tool 18 (or the tool 28) relative to each other. It is controlled by an NC (numerical control) device (not shown) so as to perform processing. The processing part 49 is a part where a predetermined processing is performed on the workpiece 14 by a tool.

Next, chips 47 generated by this processing are used.
The structure for discharging the oil and supplying and discharging the cutting fluid 48 will be described. The lathe 1 is provided with a bed 5, a chip conveyor 55 as a chip collecting means, an outflow section 4, and a coolant tank as a cutting oil storing section (hereinafter, referred to as a tank) for discharging the chips 47 and the cutting oil 48. 56
And a cutting oil supply means 57. Bed 5
Has a partition wall 58 on which a flow path surface is formed. The flow path surface of the partition wall 58 is arranged at a position at a predetermined height H from the floor surface 9 so that the cutting fluid 48 dropped from the processing site 49 flows. Chip conveyor 55
Are disposed above the flow path surface of the partition wall 58. The chip conveyor 55 collects chips 47 generated by processing the workpiece 14 with a tool and falling from the processing site 49, and discharges the chips 47 to the outside of the lathe 1.

The outflow portion 4 is provided on the bed 5 at a position away from the processing area 45. The outflow section 4 transfers the cutting oil 48 (or a collected product composed of the cutting oil 48 and the chips 47) flowing through the chip conveyor 55 and the upper surface 59 serving as the flow path surface of the partition wall 58 to the outside of the bed 5. Has been spilled. In the present embodiment, the outflow portion 4 is provided on the rear side of the bed 5, and is disposed substantially at the center of the bed 5 in the Z-axis direction and above the tank 56. Tank 5
Reference numeral 6 denotes a position distant from the processing area 45 and attached to the outside of the bed 5. The tank 56 stores the cutting fluid 48 from which the chips 47 have been separated by the chip separating means (described later) 97 flowing out from the outflow portion 4. Tank 56
Is provided at the lower portion of the rear wall 90 of the bed 5 so as to protrude rearward. The tank 56 has a substantially rectangular shape elongated in the Z-axis direction. The cutting oil supply means 57 includes a tank 56
, A coolant pump (hereinafter, referred to as a pump) 60, a pipe 61 connected to the pump 60, a switching valve (not shown) provided in the pipe 61, and the like. The pump 60 is attached to the upper plate 62 of the tank 56,
The suction port of the pump 60 is located in the cutting fluid 48 stored in the tank 56. Cutting oil supply means 5
7 supplies the cutting fluid 48 stored only in the tank 56 to the processing site 49. The cutting fluid 48 is supplied to the tank 56
And is circulated and used by the cutting oil supply means 57 and the like.

At the front side of the bed 5, a collecting space 65 for collecting chips 47 and cutting oil 48 is formed. In the upper part of the collection space 65, the inclined surface 66
Are formed on the bed 5. Chips 47 and cutting fluid 4
8 falls on the collection space 65 from the processing part 49. These chips 47 and cutting fluid 48 are guided by the inclined surface 66 and collected in the collection space 65. Bed 5
Is divided into two upper and lower sections by a partition wall 58,
An upper part 67 and a lower part 68 are formed. Upper section 67
Includes a collecting space 65 and the like, and is where the chips 47 and the cutting oil 48 collected in the collecting space 65 are collected. The upper section 67 and the lower section 68 are each partitioned into a plurality of sections by ribs 69 and ribs 70 provided in the vertical direction (X-axis direction) to maintain rigidity. The communication of the plurality of predetermined sections of the upper portion 67 forms a flow passage for the cutting oil 48 or the collected material to flow on the upper surface 59 of the partition wall 58. For example, a through hole 71 or the like is formed at a predetermined position of the rib 69 so that the cutting oil 48 or the collected material flows from the collection space 65 to the outflow portion 4. The partition wall 58 has a first wall 72 located below the processing area 45 and a second wall 73 extending from the first wall 72 to the outlet 4. Ribs 69 and 70 are located at the boundary between the first wall 72 and the second wall 73. First
Wall portion 72 constitutes a bottom plate of the collection space 65.

FIG. 4 is a schematic view showing a state in which the partition wall 58 of the bed 5 is inclined. FIG. 4 (A) is a front view of the lathe 1 and FIG. It is a side view which shows a cross section. FIG. 4C is a side view showing a cross section of a part of the bed 5 according to a modification of the present embodiment, and is a diagram corresponding to FIG. 4B. In FIG. 4, the inclination angle (the angle with respect to the horizontal plane) is shown in an enlarged manner in order to more clearly show the state of the inclination of the partition wall portion 58. 1 and 4
As shown in (A) and (B), the channel surface of the bed 5
It is constituted by the upper surface of the first wall 72 and the upper surface of the second wall 73. The upper surface of the first wall 72 includes inclined upper surfaces 77 and 78 and a horizontal upper surface 76.
Is inclined so that the side communicating with the upper surface of the wall portion 73 becomes lower. Therefore, the upper surface of the first wall portion 72 is inclined at a predetermined inclination angle in the Z-axis direction by the inclined upper surfaces 77 and 78 so that the horizontal upper surface 76 at the position corresponding to the outflow portion 4 becomes lower. I have. In other words, the position that has proceeded straight from the outflow portion 4 located substantially at the rear center of the bed 5 to the collection space 65 forward is the position that communicates with the upper surface 76 that is the lower position of the first wall 72. is there. In the case where the outflow portion 4 is located on the right or left side of the bed 5, the position of the upper surface 76 may be changed corresponding to the position of the outflow portion 4. The upper surface of the second wall 73 is
The outflow portion 4 is inclined so as to be lower than the side communicating with the horizontal upper surface 76 of the first wall portion 72. That is, the upper surface of the second wall portion 73 is inclined at a predetermined inclination angle so that the outflow portion 4 located on the rear side is lower than the rib 69 located on the front side.

As described above, the upper surface of the first wall portion 72
Y-axis direction orthogonal to the axial direction and X-axis direction (front-back direction)
Is substantially horizontal (FIG. 4B). Thereby, the chip conveyor 55 can be easily installed. As shown in FIG. 4C, the inclined plane 77,
The first wall portion 72 may be formed so that 78 is substantially horizontal in the Y-axis direction and only the upper surface 76 is inclined in the Y-axis direction. With this configuration, the partition wall portion 58 can be configured such that the first wall portion 72 and the second wall portion 73 are continuously lowered at substantially the same inclination angle on the rear side. FIG. 4 (A),
As shown in (B) and (C), the second wall 73 of the partition wall 58 (or the first wall 72 and the second wall 73).
By providing a slope on the upper surface of the, the collected material flows favorably from the collecting space 65 to the outflow portion 4.

As shown in FIGS. 1 to 4, the splash guard 2 is directly attached to the bed 5. The tank 56 is provided on the opposite side of the processing area 45.
That is, the tank 56 is located on the opposite side (rear side) to the side (rear side) on which the splash guard 2 is provided (the front side).
Along the outer surface 75 of the rear wall 90. The splash guard 2 has a main body 80 and an opening / closing door 3 for blocking an opening of the main body 80. The splash guard body 80 is directly attached to an outer peripheral edge 81 formed on the bed 5 so as to surround the processing area 45 by a fastening member such as a bolt 79. The space between the splash guard body 80 and the outer peripheral edge 81 is sealed by applying a sealing agent so that there is no gap. A lower guide rail 82a for guiding and supporting the opening / closing door 3 so as to be movable in the left-right direction is provided at a lower front part of the splash guard body 80.
Are provided extending left and right. In the lower part of the door 3,
Rollers 8 Rollable on Lower Guide Rail 82a
3a is attached. Splash guard body 80
An upper guide rail 82b is provided on the upper side of the upper left side. The upper guide rail 82b has an opening / closing door 3
, A plurality of rollers 83b provided therein. The roller 83b is capable of rolling in the upper guide rail 82b. When the roller 83a rolls on the lower guide rail 82a and the roller 83b rolls in the upper guide rail 82b, the door 3 moves in the left-right direction.
Thus, the opening of the splash guard body 80 can be opened and closed. At a position close to the processing part 49, the splash guard body 80 and the bed 5 are sealed so that no gap is generated between them. Further, even at a position far from the processing portion 49, the splash guard body 80 is attached to the bed 5 in a state where a sealant is applied so that no gap is generated. Therefore, it is possible to prevent the chips 47 and the cutting oil 48 from scattering or leaking outside the processing area 45.

The chip conveyor 55 extends in the Z-axis direction and is disposed in the collection space 65. One end 84 of the chip conveyor 55 is located in the collection space 65, and the other end is located outside the lathe 1. The one end 84 is provided so as to be located at least below the processing part 49 (or near the lower part of the processing part 49). The chip conveyor 55 is provided with guide members 85 that are continuous with the inclined surface 66 of the bed 5 and the splash guard body 80, respectively. Therefore, the chip conveyor 55 can receive almost all of the chips 47 falling in the processing area 45. The chip conveyor 55 discharges the received chips 47 to a chip box (not shown) provided on the outside (or outside rear) of the lathe 1 by the conveyor unit 86. Since the cutting fluid 48 flowing into the chip conveyor 55 flows out from one or a plurality of through holes formed in the casing 87 of the chip conveyor 55, the chip conveyor 55 may discharge only the chips 47 to the outside. it can. By providing the chip conveyor 55, the chips 47 are automatically discharged to the outside of the lathe 1, so that the labor of the operator is greatly reduced. Although the chip conveyor 55 extends in the left-right direction, the chip conveyor 55 may extend in the front-rear direction. In this case, the chip conveyor 55 includes a through hole 71 and an opening 91 described later.
Through the lathe 1. When the chip conveyor 55 is not provided, a chip receiving box having a plurality of holes formed in a part of the bottom plate and the side plate may be placed in the collection space 65. That is, the chips 47 are collected in a chip receiving box as chip collecting means, and the cutting oil 48 is allowed to escape to the partition wall 58 through a plurality of holes. The chips 47 accumulated in the chip receiving box are to be discharged by the operator to the outside of the machine tool. If the chip receiving box is also provided so that a part of the other end side is located outside the splash guard 2, the operator can easily perform the chip discharging operation.

The outflow section 4 is provided with an opening 91 and a collection guide section 9.
And 2. The opening 91 is formed in the rear wall 90 of the bed 5, and the upper surface 59 of the partition wall 58 is a horizontal side below the opening 91. The collection guide 92 is continuous with the lower peripheral edge of the opening 91 and is fixed to the bed 5 integrally or separately. The collected material or the cutting oil 48 that has flowed on the upper surface of the second wall 73 exits the bed 5 through the opening 91, is guided by the collected material guide 92, and flows down into the tank 56. The tank 56 has a plurality of bolts 95.
Thus, the bed 5 is fixed to the rear wall 90. Thereby, when transporting and installing the lathe 1, the bed 5 and the tank 56 can be handled integrally, so that the working efficiency is improved. The tank 56 may not be fixed to the bed 5. The upper plate 62 of the tank 56 is formed with a recovered material inflow portion 96 that is one step lower from the upper portion. The upper plate 62 is provided so as to be detachable from the tank body 56a. When performing maintenance work such as cleaning the inside of the tank body 56a, the upper plate 62 composed of one or more sheets is removed, and the upper part of the tank body 56a is opened. In addition, when the maintenance work is not being performed, the upper plate 62 is fixed to the tank body 56a with a fastening member such as a bolt 63 to prevent chips, dust, and the like from falling into the tank body 56a from above.

The lathe 1 has a chip separating means 97 which is provided below the outflow section 4 and is provided in the recovered material inflow section 96 of the tank 56. The chip separating means 97 can separate the collected material flowing out of the outflow portion 4 without passing the chip 47 and allow only the cutting oil 48 to flow into the tank 56. The chip separating means 97 includes:
It has a cage-shaped separating member 98 that allows only the cutting oil 48 to flow and allows the chips 47 to be separated. The separating member 98 has a large number of through holes 99 through which only the cutting fluid 48 can pass. In addition, the through-hole 99 may be formed by using a wire mesh or a perforated plate. The separating member 98 has a substantially rectangular shape when viewed from above, and is detachably engaged with an edge of the recovered material inflow portion 96 of the tank 56. Since the separation member 98 is provided with one or a plurality of handles 101, the handle 1
The user can remove the separation member 98 by holding the chip 01 to empty the chips 47 into the chip box or clean the separation member 98. The separation member 98 fits into an opening 100 formed in the collected material inflow portion 96. Therefore, the collected matter passes from the outflow section 4 to the separated member 98 via the collected matter inflow section 96. Then, the cutting fluid 48 flows into the tank 56 and the chips 47 remain in the separating member 98, so that the cutting fluid 48 and the chips 47 are separated.

Next, the operation of the lathe 1 will be described. As shown in FIGS. 1 to 4, first, the workpiece 14 is gripped by the claws 15a of the chuck 15, and in this state, the spindle is driven to rotate at a predetermined rotation speed by the spindle motor. Then
The workpiece 14 rotates while being held by the chuck 15. When the size of the workpiece 14 is long in the axial direction, the opposite side of the end of the workpiece held by the chuck 15 may be supported by a tailstock (not shown). When the desired tool 18 has not been indexed in the tool rest 6, the turret 27 is rotated and indexed. By this operation,
The desired tool 18 is indexed on the workpiece 14 side of the workpiece 14. Thereafter, the Z-axis servomotor is driven to move the saddle 20 in the Z-axis direction. The X-axis servo motor is driven to move the cross slide 24 in the X-axis direction. Thereby, the tool rest 6 moves in the Z-axis direction and the X-axis direction with respect to the workpiece 14, and the tool 18
Is machined at the processing site 49 of FIG. The NC (numerical control) program for the procedure of cutting the workpiece 14 is stored in advance in the NC program memory of the NC device. The NC device calls a necessary NC program from the NC program memory and controls the machining operation of the lathe 1.

At the time of cutting, the cutting oil supply means 57
Supplies the cutting oil 48 stored in the tank 56 to the processing site 49. From a nozzle (not shown) arranged around the tool 18, a cutting oil 48 sucked into a pump 60 is jetted toward a processing portion 49. The cutting oil 48 supplied to the processing area 45 is collected in a collecting space 65.
Run down. Further, the cutting oil 48 that has flowed down onto the chip conveyor 55 flows into the collection space 65 through the through hole of the casing 87. In the collecting space 65, the cutting oil 48 flows on the inclined upper surfaces 77 and 78 of the first wall 72 inclined in the Z-axis direction and collects on the upper surface 76. Then
The cutting oil 48 flows from the upper surface 76 through the through hole 71 of the rib 69, flows on the upper surface of the second wall 73 inclined backward, and flows out of the bed 5 from the outlet 4. Chips 47 generated at the processing portion 49 by the cutting process are guided by the inclined surface 66 and the guide member 85 and collected on the chip conveyor 55 in the collection space 65. Most of the chips 47 are discharged to the outside of the lathe 1 by the chip conveyor 55. A part of the remaining chips 47 is discharged from the outflow portion 4 as a collected material together with the cutting oil 48. The collected material passes through the opening 91 at the outflow portion 4, is guided by the collected material guide portion 92, and flows into the separation member 98. In the separation member 98, the cutting oil 48
Chips 47 flowing together with the cutting oil 47 are separated, and the cutting fluid 4
8 is stored in the tank 56 through the through hole 99. Since the chips 47 are removed by the separating member 98, the tank 56 stores the clean cutting oil 48. The outflow portion 4 is provided at a position distant from the processing area 45, so the chips 47 scattered in the processing area 45 and the mist-like cutting oil 4
There is no danger that the particles 8 scatter from the outflow part 4 to the outside of the lathe 1.

FIG. 5 is a side sectional view of a machine tool according to another embodiment of the present invention. Note that the same or corresponding parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted. In FIG. 5, a lathe 1a as a machine tool has a so-called slant type bed in which the guide surfaces 110 and 111 of the bed 5a are inclined. The tool post 6a moves while being guided by the guide surfaces 110 and 111. Headstock 7
The workpiece 14 is gripped by the claws of the chuck 15a. The lathe 1a supplies the cutting oil 48 to the processing portion 49 of the workpiece 14 in the processing area 45, and the workpiece 14 and the tool 18
The processing is performed by the relative movement with. The bed 5a has a predetermined height H so that the cutting oil 48 flows.
The partition wall portion 58a is disposed at the position shown in FIG. The chip conveyor 55 is generated by processing and
The chips 47 that are generated and fall down are discharged outside the lathe 1. The outflow portion 4 is provided on the bed 5a at a position away from the processing area 45. The outflow portion 4 is formed by the cutting oil 48 flowing on the upper surface 59a (flow path surface portion) of the partition wall portion 58a.
And the chips 47 that could not be discharged by the chip conveyor 55
Is discharged out of the bed 5a.
The tank 56 is located at a position away from the processing area 45 and the bed 5.
The cutting oil 48 flowing out of the outflow portion 4 is stored only in the outside of a. The cutting fluid supply means 57 supplies the cutting fluid 48 stored only in the tank 56 to the processing portion 49. The main body 80a of the splash guard 2a that shields the processing area 45 is directly attached to the bed 5a by a fastening member such as a bolt 79a. A sealant is applied and attached between the splash guard 2a and the bed 5a so that there is no gap.

The tank 56 is disposed along the outer surface 75a of the bed 5a on the opposite side (rear side) from the side (front side) on which the splash guard 2a is provided. The upper surface 59a of the partition wall portion 58a serving as the flow channel surface portion is inclined so that the outflow portion 4 becomes lower. The tank 56 is provided with the same chip separating means 97 as in the above embodiment. The lathe 1a also has the same operation and effect as the lathe 1.

In the above two embodiments, the inclination angles of the upper surfaces 59, 59a of the partition walls 58, 58a are about 5/1.
000 is preferred. In this way, the cutting oil 48 and a small amount of the chips 47 can move from the collection space 65 to the outflow portion 4 in a favorable manner. In addition, the height of the tank 56 is maintained without increasing the height of the lathes 1 and 1a,
Can have a desired capacity. Chips 47 and cutting oil 48 are supplied to the splash guards 2 and 2a and the beds 5 and 5.
lathe 1, 1a from the gap between the
Does not leak to the outside and soil the floor surface 9. Therefore, good safety and environmental friendliness can be realized. The tank 56 is detachably attached to the beds 5, 5a. The tank 56 is located behind the lower portions of the beds 5 and 5a and is installed outside the beds 5 and 5a. Therefore, the space above the tank 56 is a space. Further, the chip conveyor 55 and the tank 56 are arranged separately. When the upper plate 62 of the tank 56 is removed, since the upper part of the tank 56 is open, maintenance such as inspection and cleaning of the inside of the tank 56 can be easily performed without moving the tank 56. The separation member 98 is provided on the tank 56 so as to be detachable. Therefore, the separation member 98 is lifted to collect a chip collecting box (chip box).
The chips 4 accumulated in the separating member 98
7 can be easily removed.

Further, the volume of the cutting fluid 48 in the tank 56 may be different depending on the needs of the user of the machine tool. For example, a tank 56 having a large capacity may be required to supply a large amount of cutting oil to the processing site 49. Even in such a case, the large capacity tank 5
Since it is sufficient to arrange the bed 6 behind the beds 5 and 5a, it is possible to appropriately cope with the situation. By the way, in machine tools such as the lathes 1 and 1a, the control panel 120 is generally arranged at the rear of the beds 5 and 5a. In the control panel 120,
The opening / closing door 121 is supported so as to swing about a vertical axis and open and close. Further, a place for opening and closing the door 121 during maintenance of the control panel 120 is also required as an installation place of the machine tool. Therefore, in the present invention, the tank 56 is installed at the rear of the beds 5 and 5a. However, since this tank 56 is located at the lower part of the control panel 120, there is no danger of increasing the installation area of the machine tool. Maintenance is also possible. In the drawings, the same reference numerals indicate the same or corresponding parts.

[0028]

Since the present invention is constructed as described above, it is possible to prevent chips and cutting fluid from leaking to the outside from gaps between a splash guard, a bed and a cutting fluid storage portion of a machine tool. The maintenance of the cutting oil storage section and the like can be easily performed.

[Brief description of the drawings]

FIGS. 1 to 5 are views showing an example of an embodiment of the present invention, and FIG. 1 is a side view showing a part of a machine tool according to an embodiment in a cross section.

FIG. 2 is a perspective view showing a part of the machine tool.

FIG. 3 is a sectional view showing a part of a coolant tank.

FIG. 4 is a schematic view showing a state where a partition wall portion of a bed is inclined. FIG. 4 (A) is a front view of a machine tool, and FIG. 4 (B).
FIG. 4C is a side view showing a cross section of a part of the bed, and FIG. 4C is a side view showing a cross section of a part of the bed according to a modification.

FIG. 5 is a side sectional view of a machine tool according to another embodiment of the present invention.

[Explanation of symbols]

 1, 1a Lathe (machine tool) 2, 2a Splash guard 4 Outflow section 5, 5a Bed 14 Workpiece 18, 28 Tool 45 Processing area 47 Chip 48 Cutting oil agent 49 Processing area 55 Chip conveyor (Chip collecting means) 56 Coolant Tank (cutting oil storage section) 57 Cutting oil supply means 59, 59a Upper surface of partition wall (flow path surface) 72 First wall 73 Second wall 84 One end 97 Chip separation means H Predetermined height

Claims (3)

[Claims] 1. A machine tool for supplying a cutting fluid to a machining portion of a workpiece in a machining area and performing machining by a relative movement between the workpiece and a tool, wherein a cutting fluid dropped from the machining portion flows so as to flow. A bed having a flow path surface portion arranged at a height position of, and provided at an upper portion of the flow path surface portion of the bed, and at least one end located below or near the lower part of the processing portion, A chip collecting means for collecting chips that are generated and dropped at the processing site, provided on the bed at a position away from the processing area,
An outflow portion through which the chips, which pass through the flow path surface portion and pass through the chip collecting means, and the collected material including the cutting oil flow out of the bed; and an outside of the bed at a position away from the processing area. A cutting fluid storage unit for storing the cutting fluid, the cutting fluid being provided in the cutting fluid storage unit, separating the chips from the collected material flowing out from the outflow unit, and storing the cutting fluid in the cutting fluid storage. A machine tool comprising: a chip separation unit that flows into a cutting unit; and a cutting oil supply unit that supplies the cutting oil stored only in the cutting oil storage unit to the processing site. 2. A splash guard for shielding the processing area and preventing the cutting fluid and the chips from being scattered or leaking from the processing area is provided on the bed. The machine tool according to claim 1, wherein the machine tool is provided on the opposite side of the machine tool. 3. The upper surface of a first wall portion located below the processing area and the upper surface of a second wall portion extending from the first wall portion to the outflow portion. The upper surface of the first wall is inclined so that the side communicating with the upper surface of the second wall is lower, and the upper surface of the second wall is the first wall. The machine tool according to claim 1, wherein the outflow portion is inclined to be lower than a side of the wall portion communicating with the upper surface.