JP6836674B1 - Machine Tools - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently recover coolant by suppressing leakage to the outside in a machine tool. SOLUTION: The enclosure member 110 surrounding the processing space S for processing the work W, the work processing unit 120, the coolant supply unit 130, and the collection unit 200 for collecting the chip Ch generated in the processing of the work W together with the coolant are provided. The collection unit 200 includes a tank 201 for storing coolant and a chip conveyor 202, and the chip conveyor 202 has a first portion 21A having a chip charging unit, a transport unit 22 for transporting chips, and chips outside. A machine tool comprising a second portion 21C having an outlet for outlets and a blower portion 23 for sending air flowing in a direction from the second portion 21C to the first portion 21A. [Selection diagram] Fig. 3

Description

The present disclosure relates to machine tools and chip conveyors.

Patent Document 1 relates to a case 2 including a case 2 in which a coolant liquid is introduced from a machine tool and a recovery mechanism 3 for collecting and discharging foreign substances in the coolant liquid sinking in the bottom of the case 2. A partition wall 6 is provided at a position that prevents the mist of the coolant liquid introduced from the introduction port from flowing toward the discharge port.

The machine tool 42 proposed by Patent Document 2 (FIG. 7, 0054) is provided with a mist collector 60 that collects mist and the like in the machining area MS. A suction duct 61 is provided between the mist collector 60 and the processing region MS, and a supply duct 62 is provided between the mist collector 60 and the non-processing region CS. The suction duct 61 sucks air containing mist floating in the processing region MS and sends it to the mist collector 60. The mist collector 60 removes mist and the like contained in the air sent from the suction duct 61, and discharges clean air. The supply duct 62 supplies the clean air discharged from the mist collector 60 into the non-processed region CS from above the rear part of the base 43.

JP-A-2018-24066 International Publication No. 2018/070416

Even if a partition wall is provided in the case of the chip conveyor device as in Patent Document 1, it is difficult to sufficiently prevent the mist of the coolant liquid from being discharged from the discharge port, and the chip is provided by providing the partition wall. This leads to complication of the structure of the conveyor device. Further, when a mist collector is attached to a machine tool as in Patent Document 2, it is desired to reduce the size of the mist collector. However, as the mist collector becomes smaller, the ability to collect the mist from the processing space becomes smaller, so that the mist easily leaks to the outside through the discharge port provided in the mist collector or the gap of the device.

One aspect of the present disclosure is an enclosing member that surrounds a machining space for machining a work, a work machining section for machining a workpiece in the machining space, a coolant supply section for supplying coolant to the machining space, and machining of the work. The chip conveyor includes a collection unit that collects the chips generated in the above together with the coolant, and the collection unit includes a tank that stores the coolant and a chip conveyor that is partially arranged in the tank. However, the first portion having the chip insertion portion, the transport portion for transporting the chip, the second portion having the outlet for discharging the chip, and the air flowing in the direction from the second portion to the first portion With respect to a machine tool, including a blower to send.

Another aspect of the present disclosure is a chip conveyor, part of which is housed in a tank, which transports chips generated in the machining of the workpiece and stores the coolant, and has a first portion having a chip loading portion and chips. The present invention relates to a chip conveyor including a transport unit for transporting chips, a second portion having an outlet for discharging chips, and a blower unit for sending air flowing in a direction from the second portion toward the first portion.

According to the present disclosure, leakage of coolant mist to the outside can be reduced.

It is a top view which shows typically the structure of the example of the machine tool which concerns on one Embodiment. It is a schematic arrow view of the machine tool of FIG. 1 on the line II-II. It is a schematic side view of the machine tool of FIG. It is a schematic cross-sectional view of an example of a chip conveyor. It is a schematic cross-sectional view of another example of a chip conveyor. It is a schematic cross-sectional view of still another example of a chip conveyor. It is a perspective view which shows the appearance of the 1st blower part. It is a schematic side view of the machine tool which concerns on the modification of FIG.

Hereinafter, embodiments of the machine tool and the chip conveyor according to the present invention will be described with reference to the accompanying drawings. In the description of each embodiment, terms indicating directions (for example, "up / down", "left / right", and "X-axis, Y-axis, Z-axis", etc.) are appropriately used, but these terms are for explanation purposes only. The present invention is not limited thereto. Further, in each drawing, the shapes or dimensions of the respective components of the machine tool and the chip conveyor are not necessarily represented by the same scale ratio. Further, in each drawing, the same components are shown by using the same reference numerals.

Machine tools include, for example, lathes, vertical or horizontal machining centers, multi-tasking machines having a turning function using fixed tools and a milling function using rotating tools, in addition to the X-axis, Y-axis, and Z-axis, 2 Examples include, but are not limited to, a 5-axis machine tool controlled by one or more swivel axes and an Adaptive Machining (AM) machine capable of metal addition machining.

FIG. 1 is a top view schematically showing the structure of an example of a machine tool according to an embodiment of the present invention. FIG. 2 is a schematic arrow view of the machine tool of FIG. 1 on lines II-II. FIG. 3 is a schematic side view of the machine tool of FIG. The machine tool 100 of the illustrated example is a horizontal machining center capable of multi-face machining of a work W as a workpiece by controlling at least the X-axis, the Y-axis, and the Z-axis, for example.

The machine tool 100 includes a surrounding member 110 that surrounds the machining space S for machining the work W, a work machining section 120 that processes the work W inside the machining space S, and a coolant supply section 130 that supplies the coolant CL to the machining space S. And a collection unit 200 that collects the chip Ch (cutting waste) generated in the processing of the work W together with the coolant CL. The machine tool 100 generally includes a bed 140 arranged vertically below the work processing unit 120, and is installed on a floor of a factory or the like via the bed 140. A column 150 extends from the bed 140 in the Y direction, and a spindle head 121 of the work processing portion 120 extends from the column 150 in the Z direction. The machine tool 100 may include a setup station for preparing a pallet 160 on which the work W is mounted.

The surrounding member 110 is also called a splash guard, and prevents coolant CL, chips (cutting chips) Ch, and the like from scattering from the processing space S to the outside. The surrounding member 110 usually has a peripheral side wall and a ceiling wall surrounding the processing space S. The enclosing member may include a door that moves relative to the enclosing member itself.

The work processing unit 120 refers to a main part of the machine tool 100 provided inside the processing space S. The work processing unit 120 includes a spindle head 121 and a spindle 122 mounted on the column 150, and a cutting tool (bite) 123 fixed to the spindle 122. A cutting tool 123 is detachably attached to the spindle 122. The cutting tool 123, which is a tool, is selected so that it can perform arbitrary machining such as cutting, drilling, and polishing. The work W is fixed to, for example, an Iker 161 (see FIG. 3) placed on the pallet 160. The pallet 160 is fixed to the work table 170. The work table 170 and the spindle 122 can be relatively moved by numerical control by a computer. The column 150 can be moved in the X direction on the bed 140, the spindle head 121 can be moved in the Y direction, and the work table 170 can be moved in the Z direction. A part of the column 150 and the spindle head 121 is covered with the protector 180 and is shielded from the processing space S.

In the illustrated example, the coolant supply unit 130 has the form of a nozzle for injecting the coolant CL into the processing space S. In the illustrated example, the coolant supply unit 130 has, but is not limited to, the form of a nozzle for injecting the coolant CL toward the work W and the cutting tool 123. As another example, there are a form in which the coolant CL is injected from the tip of the tool through the inside of the spindle, a form in which the coolant CL is injected from the ceiling in order to wash away the chip Ch inside the processing space S, and the like. Most of the coolant CL injected into the work W and the cutting tool 123 is collected through, for example, a recovery hole 200h provided below the spindle 122 or a predetermined chip receiving portion provided in the collection unit 200, and is separated from the chip Ch. After being done, it will be reused. On the other hand, a part of the coolant CL becomes mist in the processing space S and floats in the processing space S.

The recovery unit 200 includes a tank 201 for storing the coolant CL and a chip conveyor 202 in which a part of the coolant CL is arranged. The chip conveyor 202 includes a housing 21 having a tunnel-shaped passage T, a transport unit 22 for transporting the chip Ch, and a blower unit 23 for sending air to the inside of the housing 21.

The housing 21 is housed in the tank 201, and has a first portion (horizontal portion) 21A having a chip insertion portion and a wall portion extending from the first portion 21A to the outside of the tank 201 and forming the tunnel-shaped passage T. It has a (rising portion) 21B and a second portion 21C located on the side opposite to the first portion 21A side of the wall portion 21B. The space inside the housing 21 communicates with the space inside the tank 201 via a predetermined communication portion 29a (see FIG. 4A). The second portion 21C has an outlet M1 for discharging the chip Ch out of the housing 21.

The first portion (horizontal portion) 21A of the housing 21 has an appearance extending in the horizontal direction. The first portion (horizontal portion) 21A has a substantially rectangular shape in a plan view. The wall portion (rising portion) 21B of the housing 21 rises from one end in the longitudinal direction of the first portion 21A and extends obliquely upward. The second portion 21C of the housing 21 has a substantially box-shaped shape continuous with the upper end of the wall portion 21B.

The transport unit 22 that transports the chip Ch includes a hinge or a plate that captures the chip Ch. The transport unit 22 transports the captured chip Ch in the first direction (that is, the direction toward the outlet M1) from the first portion 21A to the second portion 21C in the passage T, and discharges the chip Ch from the outlet M1. The rotation direction of the transport unit 22 is not particularly limited, and is determined by the type of the chip conveyor 202.

The transport unit 22 has a first transport unit 22A arranged in the first portion 21A and a second transport unit 22B arranged in the passage T of the wall portion 21B. The wall portion 21B of the housing 21 can be rephrased as a portion surrounding the second transport portion 22B that transports the chip Ch diagonally upward. The first portion 21A can be rephrased as a portion other than the wall portion 21B and the second portion 21C of the housing 21.

The first transport unit 22A is arranged in the tank 201 and captures the chip Ch. The second transport unit 22B transports the captured chip Ch diagonally upward. The maximum acute angle formed by the first transport section 22A and the second transport section 22B is set to, for example, 60 to 70 °. The second transport portion 22B is continuous with the folded portion 22C arranged in the second portion 21C. The transport unit 22 inverts the captured chip Ch at the folded-back unit 22C so as to drop it toward the outlet M1.

More specifically, the captured chip Ch is transported obliquely upward in the first direction from the first portion 21A to the second portion 21C, and then discharged from the outlet M1 to the outside of the passage T. .. The exit M1 is provided in the second portion 21C so as to face vertically downward. The chip Ch released from the outlet M1 is collected in the chip bucket 240.

FIG. 4A is a schematic cross-sectional view of an example of the chip conveyor 202A, and shows an example of the scraper type transport unit 22. The transport unit 22 includes a plate 24 that captures the chip Ch. The transport unit 22 has a pair of endless chains 25, a drive sprocket 26 for transporting the endless chains 25, and a driven sprocket 27. The plate 24 is fixed to the endless chain 25. The plate 24 extends in a plate shape in the width direction of the chip conveyor 202A between the pair of endless chains 25.

The transport unit 22 has a guide plate 28 that guides the chip Ch. The plate 24 moves while sliding in contact with the guide plate 28. The guide plate 28 is provided along the endless chain 25 traveling on the outward path of the transport portion 22. Usually, a plurality of plates 24 are arranged at intervals from each other in the direction in which the endless chain 25 extends in an annular shape.

The endless chain 25 is also hung on a drum filtration tank 29 that rotates in conjunction with the sprockets 26 and 27. The drum filtration tank 29 has a filtration layer 29b that separates the chip Ch and the coolant CL. The filtration layer 29b is composed of a filter capable of capturing the chip Ch. The drum filtration tank 29 has a cylindrical shape, and a filtration layer 29b is arranged around the drum filtration tank 29. The clean coolant CL filtered by the filtration layer 29b flows into the hollow space of the drum filtration tank 29. The hollow space of the drum filtration tank 29 communicates with the space inside the tank 201 via a communication portion 29a having a through hole. The clean coolant CL passes through the communication portion 29a and flows into the tank 201.

The type of the transport unit 22 is not particularly limited, and may be a scraper type as shown in FIG. 4A, but may be, for example, a hinge type or a magnet type. The plate means a plurality of scrapers (scrapers) in the case of a scraper type or magnet type transport unit, and means a hinge plate in the case of a hinge type.

FIG. 4B shows another scraper type chip conveyor 202B in a schematic cross-sectional view, and FIG. 4C shows a hinge type chip conveyor 202C in a schematic cross-sectional view. In FIGS. 4B and 4C, the components corresponding to the components shown in FIG. 4A have the same signs as those in FIG. 4A.

In the scraper type chip conveyor 202B of FIG. 4B, the rotation directions of the sprockets 26 and 27 are opposite to those of the chip conveyor 202A of FIG. 4A. Further, the chip conveyor 202B does not have the guide plate 28 provided in the chip conveyor 202A of FIG. 4A, and the chip Ch moves along the wall surface of the housing 21. Here, the bottom surface of the first portion 21A and the bottom surface of the wall portion 21B function as guide surfaces.

The hinge-type chip conveyor 202C of FIG. 4C is a connecting body of a plurality of rods fixed so as to bridge between a pair of endless chains 25 and a plurality of hinge plates 24a that can rotate around these rods. .. The plurality of rods are arranged side by side along the transport direction of the chip Ch. The hinge plate 24a connects adjacent rods to each other. The chip conveyor 202C is provided with convex portions 24b for damming the slip of the chips Ch at predetermined intervals. In the chip conveyor 202C, the chip Ch is captured and moved on the hinge plate 24a.

The blower portion 23 sends air flowing in the direction (second direction) from the second portion 21C to the first portion 21A inside the housing 21. This prevents the mist of the coolant CL from being discharged from the outlet M1 that discharges the chip Ch. Therefore, the leakage of the coolant from the outlet M1 to the outside can be suppressed and the coolant can be efficiently recovered. Further, it is easy in design to provide the blower portion 23 on the chip conveyor 202, the structure of the chip conveyor is not complicated, and the manufacturing cost thereof can be suppressed.

FIG. 5 is a perspective view showing the appearance of the blower unit 23. The blower portion 23 is arranged above the outlet M1 facing vertically downward. That is, the open end surrounding the outlet M1 of the second portion 21C is located at the uppermost portion of the second transport portion 22B or below the folded portion 22C. On the other hand, an air supply port M2 is provided above the outlet M1 of the second portion 21C of the housing 21 so as to communicate with the blower portion 23. The direction in which the tip Ch falls from the outlet M1 and the flow direction of the air blown from the air supply port M2 into the passage T by the air blower 23 form a predetermined acute angle. Therefore, the air in the passage T is less likely to be released from the outlet M1, and the mist of the coolant CL is less likely to leak from the passage T to the outside.

The blower unit 23 has a blower fan 23a such as an axial fan. Although the blower fan 23a is exposed to the outside in FIG. 5, the blower fan 23a may be surrounded by a housing having a vent. Further, in FIG. 5, a glass window M3 for visually recognizing the outlet M1 from diagonally above is provided, but the glass window M3 is closed by a glass plate.

In FIG. 3, the machine tool 100 includes a mist collector 300 that collects the mist of the coolant CL generated inside the processing space S. The mist collector 300 has an exhaust portion 33 that sucks mist from the processing space S. In this case, the mist can be more efficiently recovered from the processing space S by the first-class ventilation by the combination of the blower portion 23 and the exhaust portion 33. Further, since the first-class ventilation is performed in cooperation with the ventilation unit 23, it is easy to reduce the size of the ventilation unit 33.

The mist collector 300 has a pipe body 310 in which an intake port 301 is formed on one end side and an exhaust port 302 is formed on the other end side, and an air passage is formed from the intake port 301 to the exhaust port 302, and air. It is provided with a filtration unit 303 installed in the passage of the above. The exhaust air portion 33 is provided between the exhaust port 302 and the filtration unit 303 in the air passage.

The tubular body 310 may be installed along the surrounding member 110, or at least a part of the tubular body 310 may be installed in the processing space S. The intake port 301 of the pipe body 310 communicates with the processing space S. The exhaust port 302 communicates with the outside of the processing space S.

In FIG. 3, the entire pipe body 310 (that is, the mist collector 300) is installed above the center in the height direction inside the processing space S surrounded by the surrounding member 110. The exhaust port 302 of the pipe body 310 communicates with the outside of the processing space S through the side wall portion of the peripheral side wall of the surrounding member 110 on the side opposite to the side on which the second portion 21C of the chip conveyor 202 is arranged. There is. The tubular body 310 is installed so that the longitudinal direction forms an angle of 0 to 20 ° with the horizontal direction (that is, substantially horizontally). The longitudinal direction of the pipe body seen from the ceiling wall side of the surrounding member 110 is installed so as to form an angle of 0 to 20 ° with the passage T of the wall portion 21B of the chip conveyor 202 (that is, substantially parallel to it). .. In the illustrated example, the entire tube 310 is installed inside the processing space S, but the present invention is not limited to this, and a part of the tube 310 (for example, 5 to 95 of the volume surrounded by the outer shape of the tube 310). %) May be installed inside the processing space S.

The machine tool 100 may have a plurality of mist collectors 300. In the illustrated example, three mist collectors 300 form one unit. Further, two units are installed inside the processing space S. Within each unit, three mist collectors 300 are installed side by side. Each pipe body 310 is installed along the ceiling wall of the surrounding member 110.

The air sucked from the air supply port M2 by the blower unit 23 flows in the directions indicated by the white arrows in FIGS. 1 and 2. As a whole, the air flows in the direction indicated by the broken line arrow in FIGS. 3 and 4, and then passes through the mist collector 300. The air purified by the mist collector 300 is released to the outside. More specifically, the air sucked into the passage T by the blower 23 flows into the processing space S through the recovery hole 200h and the predetermined chip receiving portion provided in the recovery section 200 after passing through the passage T. , The processing space S is moved from the lower side to the upper side. The air that has moved upward is introduced into the mist collector 300 by the action of air supply by the blower unit 23 and exhaust by the exhaust unit 33. The air introduced into the mist collector 300 is filtered by the filtration unit 303, the mist of the coolant CL is removed, and then the air is discharged to the outside of the processing space S. The overall (or average) air flow direction seen from the ceiling wall side of the surrounding member 110 is the direction connecting the center of gravity of the first blower portion 23 and the intake port 301 of the mist collector 300.

The air flow inside the recovery unit 200 and the processing space S is not particularly limited, and is appropriately changed according to the arrangement of the blower unit 23 or the arrangement of the blower unit 23 and the mist collector 300. ..

FIG. 6 is a schematic side view showing a modified example of the machine tool. The machine tool of FIG. 6 has substantially the same configuration as that of FIG. 3 except that the positions of the blower portion 23 and the mist collector 300 are different. The blower portion 23 is arranged on the vertically lower side of the outlet M1 located on the vertically lower side of the second portion. Corresponding to the position of the blower portion 23, the second portion 21C of the housing 21 does not have the air supply port M2, while the air supply port M2 is provided on the back surface of the wall portion 21B.

Here, the back surface of the wall portion 21B on the vertically lower side of the outlet M1 faces the chip bucket 240. The chip bucket 240 is arranged so that the inlet is located vertically below the outlet M1 of the second portion 21C. The blower portion 23 is provided in the chip bucket 240 so that air directed in the second direction can be blown from the front intake port M2 to the inside of the wall portion 21B. After flowing through the inside of the housing 21 from the wall portion 21B toward the first portion 21A, the air flows into the processing space S from the recovery hole 200h and moves in the processing space S from the lower side to the upper side. The air that has moved upward is introduced into the mist collector 300 by the action of air supply by the blower unit 23 and exhaust by the exhaust unit 33.

Similar to the case of FIG. 3, the mist collector 300 is installed above the center in the height direction inside the processing space S surrounded by the surrounding member 110. However, the pipe body 310 is arranged so as to penetrate the ceiling wall vertically.

The description of the embodiments described above is exemplary in all respects and is not restrictive. Modifications and changes can be made as appropriate for those skilled in the art. The scope of the present invention is indicated by the scope of claims, not by the above-described embodiment. Further, the scope of the present invention includes modifications from the embodiment within the scope of the claims and within the scope of the claims.

The present invention may provide a machine tool or chip conveyor that reduces the leakage of coolant mist to the outside.

100: Machine tool 110: Enclosing member 120: Work processing part 121: Spindle head 122: Spindle 123: Cutting tool (bite)
130: Coolant supply unit 140: Bed 150: Column 160: Pallet 161: Iker 170: Work table 180: Protector 200: Recovery unit 200h: Recovery hole 240: Chip bucket 201: Tank 202: Chip conveyor 21: Housing
21A: First part (horizontal part)
21B: Wall part (rising part)
21C: 2nd part 22: Transport part
22A: First transport unit
22B: Second transport unit
22C: Folded part 23: Blower part
23a: Blower fan 24: Plate 25: Endless chain 26: Drive sprocket 27: Driven sprocket 28: Guide plate 29: Drum filtration tank
29a: Communication section
29b: Filtration layer 300: Mist collector 310: Pipe body 301: Intake port 302: Exhaust port 303: Filtration part 33: Exhaust part CL: Coolant Ch: Chip M1: Outlet M2: Intake port M3: Glass window S: Processing space T: Passage W: Work

Claims (5)

The surrounding member that surrounds the processing space for processing the work,
A work processing unit that processes a work in the processing space,
A coolant supply unit that supplies coolant to the processing space,
A mist collector having an exhaust portion for sucking the coolant mist from the processing space and collecting the mist generated in the processing space, and a mist collector.
A collection unit having a tank for storing coolant and a chip conveyor in which a part of the tank is arranged, and collecting chips generated in the processing of the work together with the coolant.
Equipped with
The chip conveyor has a housing having a tunnel-shaped passage, and a transfer unit arranged in the housing to convey chips.
The housing is housed in the tank and rises from a first portion having a chip charging portion and one end in the longitudinal direction of the first portion, extends to the outside of the tank, and forms a tunnel-shaped passage. and partial, continuous in the vertical direction of the upper end of the wall portion, as well as positioned on the opposite side of the first portion, comprises a second portion having an outlet to issue chip outside, the,
The chip conveyor further includes a blower that sends air flowing in a direction from the second portion to the first portion .
The blower portion and the exhaust portion are machine tools that perform type 1 ventilation in which air flows through the second portion, the first portion, and the processing space in this order. The outlet is located on the vertically lower side of the second portion.
The machine tool according to claim 1, wherein the blower is arranged above the outlet. The surrounding member that surrounds the processing space for processing the work,
A work processing unit that processes the work in the processing space, and
A coolant supply unit that supplies coolant to the processing space,
A mist collector having an exhaust portion for sucking the coolant mist from the processing space and collecting the mist generated in the processing space, and a mist collector.
A collection unit having a tank for storing coolant and a chip conveyor in which a part of the tank is arranged, and collecting chips generated in the processing of the work together with the coolant.
Equipped with
The chip conveyor has a housing having a tunnel-shaped passage, and a transfer unit arranged in the housing to convey chips.
The housing is housed in the tank and rises from a first portion having a chip charging portion and one end in the longitudinal direction of the first portion, extends to the outside of the tank, and forms a tunnel-shaped passage. It comprises a portion and a second portion that is continuous with the upper end of the wall portion in the vertical direction, is located on the opposite side of the first portion, and has an outlet for ejecting the chip.
The outlet is located on the vertically lower side of the second portion.
The chip conveyor is arranged vertically below the outlet , and further has a blower portion that sends air flowing in a direction from the wall portion toward the first portion.
The blower portion and the exhaust portion are machine tools that perform type 1 ventilation in which air flows through the wall portion, the first portion, and the processing space in this order. The mist collector
A pipe body in which an intake port is formed on one end side and an exhaust port is formed on the other end side, and an air passage is formed from the intake port to the exhaust port.
It is provided with a filtration unit installed in the air passage.
The machine tool according to any one of claims 1 to 3, wherein the exhaust portion is provided between the exhaust port and the filtration portion in the air passage. The pipe body is installed along the surrounding member, or at least a part of the pipe body is installed in the processing space, the intake port communicates with the processing space, and the exhaust port is outside the processing space. The machine tool according to claim 4, which is connected to the above.

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