JP5539442B2 - Machine tool cleaning equipment - Google Patents

Description

  The present invention relates to a machine tool, and more particularly to an in-machine cleaning device using a movable part in a machine tool for removing chips generated by machining a workpiece.

  In machine tools, the machining space is covered with a cover to prevent chips and coolant from splashing around. When machining a workpiece with a tool, a large amount of swarf is generated, and the swarf accumulates in a space (hereinafter referred to as “in-machine”) covered with a cover. When the chips enter the mechanical part of the machine tool, the mechanical part may break down. Therefore, it is necessary to clean the chips accumulated in the machine, but when this is done manually, the coolant is sent into the machine using a pump and the chips are discharged with the coolant to the outside of the machine (hereinafter referred to as In some cases, cleaning is performed using an “in-flight cleaning device”. In addition, manual cleaning cannot be performed during machining, and an in-machine cleaning device is required to sequentially clean chips generated during processing.

Patent Document 1 discloses a coolant supply device that supplies coolant to coolant injection means via a pipe line by a pump that is coolant discharge means in order to eliminate chips generated by workpiece processing. ing.
Patent Document 2 discloses a technology of a machine tool provided with a chip discharging means that can discharge chips to the outside with a simple configuration in which a groove is provided at the bottom of a splash guard.
In Patent Document 3, a chip removing unit including a nozzle that ejects a pressurized fluid such as air or cutting fluid while swinging in two degrees of freedom during machining of a workpiece is disposed. A technique is disclosed in which air or cutting fluid is spread over a wide range by rotating with the reaction force of the pressurized fluid.
In Patent Document 4, the opening / closing door that opens and closes by sliding and the rotation center axis of the opening and closing door that rotates and opens are configured by a pipe provided with a plurality of holes, and the pipe is connected to a coolant supply device. An open / close door of a machine tool that removes chips by discharging coolant from the plurality of holes is disclosed.
Patent Document 5 discloses a chip removal device in which a discharge hole for a cleaning liquid is provided obliquely toward a portion where a large amount of chip remains, and the discharge hole does not clog the discharge hole. ing.

JP 2008-110440 A JP 2008-183652 A Japanese Patent Laid-Open No. 10-180585 JP 2007-61933 A JP-A-11-170140

Chips generated by machining the workpiece are scattered over a wide area in the machine and have different sizes. When cleaning the chips with the in-machine cleaning device, the cleaning coolant is discharged over a wide area in the machine, the chips scattered over the wide area in the machine are cleaned, and the coolant is discharged vigorously to generate large chips. It is necessary to wash the powder. For that purpose, a large-scale pump that vigorously feeds a large amount of coolant into the machine is required. However, the use of such a large pump causes a problem of mechanical design changes such as a significant increase in cost and enhancement of power supply facilities.
Therefore, in view of the problems of the prior art described above, the present invention discharges a large amount of coolant over a wide range in the machine, cleans the chips scattered over a wide range, and discharges the coolant vigorously, It is an object of the present invention to provide an in-machine cleaning device using a movable part in a machine tool that can be cleaned.

The invention according to claim 1 of the present application includes a machine base, a saddle that can move in the first direction with respect to the machine base, and a second direction that is provided on the saddle and is orthogonal to the first direction. A movable table and a cover provided on the machine base and covering the saddle and the machine body including the table are provided, and the chips accumulated in the space covered with the cover are washed using a coolant. In a machine tool cleaning device, a fixed pipe having a plurality of discharge holes arranged in a space covered by the cover of the machine tool and discharging the coolant, and a long axis direction of the saddle in the second direction. At least one saddle pipe fixed in parallel; a flexible pipe connected at a predetermined position of the fixed pipe so as to communicate the saddle pipe and the fixed pipe; and A piston rod to reciprocate in the axial direction of the piston within said saddle pipe with movement of the second direction, the coolant is connected to one end of the fixed pipe and a pump for supplying to said fixed pipe, the fixed An in-machine cleaning device for a machine tool, characterized in that the number of discharge holes provided in a corner portion of a pipe is larger than the number of other portions .
The invention according to claim 2 is characterized in that the discharge hole is provided in a side surface of the fixed pipe so as to discharge the coolant toward a corner portion of the fixed pipe or a boundary between a side surface portion and a bottom surface portion of the cover. The machine cleaning apparatus for machine tools according to claim 1 .
The invention according to claim 3 includes a check valve for preventing backflow of the coolant from the fixed pipe to the pump, and the inside of the machine tool according to any one of claims 1 and 2 It is a cleaning device.

  According to the present invention, a machine tool capable of discharging a large amount of coolant over a wide area in the machine, cleaning chips scattered over a wide area, discharging the coolant vigorously, and cleaning even large chips. An in-flight cleaning device using the section can be provided.

It is a cross-sectional side view of the principal part of the machine tool provided with the cleaning apparatus according to the present invention. It is a figure which expands and demonstrates the table and saddle which are shown by FIG. It is a figure explaining the state which has a table in the center position in embodiment of this invention. It is a figure explaining the positional relationship of the pipe for saddles and a piston when a table exists in the center position in the X direction. It is a figure explaining the state which the table moved to the X direction and the Y direction in embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional side view of a main part of a machine tool provided with a cleaning device according to the present invention. The machine tool 1 includes a machine base 2, a saddle 3 disposed on the machine base 2, and a table 4 disposed on the saddle 3. The machine base 2, the saddle 3 and the table 4 are the main components constituting the main body of the machine tool. On the table 4, a work (not shown) to be processed by a tool (not shown) is placed. The saddle 3 is moved in the Y direction by driving means (not shown), and the table 4 is moved in the X direction orthogonal to the Y direction by driving means (not shown) (see FIGS. 5 and 1). The Y direction corresponds to the first direction described in the claims, and the X direction corresponds to the second direction.

  The cover 5 is a cover that covers the machine body including the saddle 3 and the table 4, and is shown with a cross-section in this drawing. By providing the cover 5, it is possible to prevent chips generated during machining of the workpiece by the tool from being scattered around. In the space covered by the cover 5 (inside the machine), tools and the like not shown are also arranged. A fixing pipe 10 having a plurality of holes is installed in the lower part of the cover 5 covering the main body of the machine tool along the inner periphery of the cover 5 from the rear in the machine, and is fixed to the cover 5. One end of the fixed pipe 10 is connected to a pump 6 that supplies coolant to the fixed pipe 10.

  FIG. 2 is an enlarged view of the table and saddle shown in FIG. The saddle 3 is movable in the Y direction on the machine base 2 by driving means (not shown), and the table 4 arranged on the saddle 3 is in the X direction perpendicular to the Y direction by driving means (not shown) (see FIGS. 3 and 5). ). The piston rod 32, the fixing member 33, and the fixing member 24 will be described in the description of FIG.

  FIG. 3 is a diagram illustrating a state where the table is at the center position in the embodiment of the present invention. As described above, the fixed pipes 10 and 12 having a plurality of holes formed from the rear side in the machine along the inner periphery of the cover 5 are installed to the front and fixed to the cover 5 at the lower part of the cover 5 covering the main body of the machine tool. . First, the fixed pipe 10 will be described. A nozzle 12 is connected to one end of the fixed pipe 10 via a corrugated pipe 14. As shown in FIG. 1, discharge holes 16 for discharging the coolant are provided at a plurality of locations on the side surface of the fixed pipe 10. Next, the fixed pipe 11 will be described. A nozzle 13 is connected to one end of the fixed pipe 11 via a corrugated pipe 15. As with the discharge holes 16 provided on the side surface of the fixed pipe 10, the discharge holes 17 are provided at a plurality of locations on the side surface of the fixed pipe 11. The nozzles 12 and 13 attached to the tips of the fixed pipes 10 and 11 via the corrugated pipes 14 and 15 change their postures by bending the corrugated pipes 14 and 15 so that the coolant can be discharged in an arbitrary direction. Can do. Portions surrounded by broken lines 26, 27, 28, and 29 represent corner portions of the fixed pipes 10 and 11.

  A saddle pipe 22 is fixed by a fixing member 24 at an appropriate location on the side surface of the saddle 3 so that the major axis direction thereof is parallel to the X direction. Similarly, a saddle pipe 23 is fixed to an appropriate portion of the side surface of the saddle 3 by a fixing member 25 so that the major axis direction thereof is parallel to the X direction. Pistons 34 and 35 (see FIG. 4) fixed to both ends of a piston rod 32 fixed to the table 4 by a fixing member 33 are inserted into the saddle pipes 22 and 23. The saddle pipes 22 and 23 do not have to be used as a pair, and any one of them may be used.

  The saddle pipes 22 and 23 are straight tubular hollow pipes whose both ends are open, and no coolant discharge holes are provided on the side surfaces of the saddle pipes 22 and 23. One end of the saddle pipe 22 is connected to one end of the deformable flexible pipe 20, and the other end of the flexible pipe 20 is connected to the fixed pipe 10 by the branch member 18. One end of the saddle pipe 23 is connected to one end of the deformable flexible pipe 21, and the other end of the flexible pipe 21 is connected to the fixed pipe 10 by the branch member 19. The reason for using the flexible pipes 20 and 21 is to follow the movement of the saddle 3 in the Y direction and the movement of the table 4 in the X direction.

  FIG. 4 is a view for explaining the positional relationship between the saddle pipe and the piston when the table is at the center position in the X direction. The figure which expanded the part enclosed with the broken line of the code | symbol 37 of FIG. 3 is a figure (a), and the figure which expanded the part enclosed with the broken line of the code | symbol 36 is figure (b). As shown in FIG. 4, the piston rod 32 is provided on the saddle 3 and is movable in the X-axis direction (corresponding to the second direction) perpendicular to the Y-axis direction (corresponding to the first direction). Further, it is fixed by a fixing member 33 so that its major axis direction is parallel to the X-axis direction. A piston 34 is attached to one end of the piston rod 32, and a piston 35 is attached to the other end. A piston 35 attached to one end of the piston rod 32 is inserted into the saddle pipe 23, and a piston 34 attached to the other end is inserted into the saddle pipe 22.

  FIG. 5 is a diagram illustrating a state in which the table is moved in the X direction and the Y direction in the embodiment of the present invention. The piston rod 32 having the piston 35 is inserted deeper into the saddle pipe 23 as the table 4 moves in the X direction (moving in the second direction) in the left direction of the drawing (see FIG. 5B). As a result, the coolant stored in the saddle pipe 23 is pressurized by the piston 35 fixed to the piston rod 32. As a result, the fixed pipe 11 includes the coolant stored in the saddle pipe 23 together with the coolant supplied to the fixed pipe 11 by the pump 6 (strictly, the coolant stored in the flexible pipe 21). ) Is supplied, a larger amount of coolant is discharged from the discharge port of the nozzle 13 connected to the fixed pipe 11 and the plurality of discharge holes 17 provided on the side surface of the fixed pipe 11 more vigorously than before. It becomes possible to wash even larger chips than usual. In order to prevent the coolant from flowing back to the pump when the coolant is pressurized, the fixed pipe 11 may be provided with a check valve 31.

  On the other hand, the piston 34 inserted in the saddle pipe 22 moves in the direction of coming out of the saddle pipe 22 by the movement of the table 4 in the left direction of the drawing. As a result, a large amount of coolant flows into the saddle pipe 22 from the fixed pipe 10 through the flexible pipe 20. The coolant stored in the saddle pipe 22 (strictly, the coolant stored in the flexible pipe 20 is included) is moved into the saddle pipe 22 by moving the table 4 in the X direction on the right side of the page. The piston 34 is pressurized and supplied to the fixed pipe 10. As described above, according to the embodiment of the present invention, the coolant can be supplied from the fixed pipes 10 and 11 to the inside of the machine in such a manner that the strength changes pulsatingly as the table 4 moves in the X direction.

  The chips accumulated in the machine are washed by discharging coolant from a plurality of discharge holes 16 and 17 provided on the side surfaces of the fixed pipes 10 and 11. At this time, the number of the discharge holes 16 and 17 for discharging the coolant to the portion where the chips are likely to be accumulated is increased so that a large amount of coolant is intensively discharged to the portion where the chips are likely to be accumulated. Reduce the number of discharge holes 16 and 17 that discharge coolant to locations where powder does not easily accumulate. (Means 2) Increase the diameter of the discharge holes 16 and 17 that discharge coolant to locations where chips are likely to accumulate, and collect chips. The diameter of the discharge holes 16 and 17 for discharging the coolant to a difficult place is reduced. (Means 3) The angle of the discharge holes 16 and 17 with respect to the fixed pipes 10 and 11 is set so that the coolant is directly discharged to a place where chips are likely to accumulate. At least one means of changing is implemented, and the discharge holes 16 and 17 are opened in the fixed pipes 10 and 11.

  As described above, the present invention does not change to a large-scale pump, and changes the number, diameter, and position of coolant discharge holes provided on the side surface of the fixed pipe, and movable parts such as the table 4 Is used to pressurize the coolant in the fixed pipes 10 and 11, thereby adjusting the coolant discharge amount and the discharge pressure, and the check valve 30 is provided in a part of the fixed pipes 10 and 11 to which the coolant is supplied by the pump 6. , 31 and other check valve functions are added to prevent the coolant from flowing backward toward the pump 6 when the coolant is pressurized. Thereby, it is possible to provide an in-machine cleaning device that cleans more chips accumulated in the machine with low cost and a small amount of design change.

1 Machine tool 2 Stand 3 Saddle 4 Table 5 Cover 6 Pump

10, 11 Fixed pipe 12, 13 Nozzle 14, 15 Corrugated pipe 16, 17 Discharge hole 18, 19 Branch member 20, 21 Flexible pipe 22, 23 Saddle pipe 24, 25 Fixed member 26, 27, 28, 29 Corner Part 30, 31 Check valve 32 Piston rod 33 Fixing member 34, 35 Piston

Claims (3)

A base, a saddle movable in a first direction relative to the base, a table provided on the saddle and movable in a second direction perpendicular to the first direction, and the base In a machine tool cleaning apparatus for cleaning chips accumulated in a space covered with a cover, the cover covering a machine body including the saddle and the table provided in the machine,
A fixed pipe having a plurality of discharge holes arranged in the space covered by the cover of the machine tool and discharging the coolant;
At least one saddle pipe having a major axis direction fixed to the saddle in parallel to the second direction;
A flexible pipe that connects the saddle pipe and the fixed pipe at a predetermined position so as to communicate with each other;
A piston rod fixed to the table and reciprocating in the axial direction within the saddle pipe as the table moves in the second direction;
A pump connected to one end of the fixed pipe and supplying the coolant to the fixed pipe ;
An in-machine cleaning device for a machine tool, wherein the number of discharge holes provided in a corner portion of the fixed pipe is larger than the number of other portions . The discharge hole is provided in a side surface of the fixed pipe so as to discharge the coolant toward a corner portion of the fixed pipe or a boundary between a side surface portion and a bottom surface portion of the cover . In-machine cleaning equipment for machine tools. 3. The machine tool cleaning apparatus according to claim 1 , further comprising a backflow prevention valve that prevents backflow of the coolant from the fixed pipe to the pump .

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