JP2006334718A - Automatic oil feeding device of machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately feed oil timely according to working time or stopping time, and to suppress useless consumption of lubricating oil in either case of working time or stopping time associated with cutting by the machine tool. <P>SOLUTION: A working time timer accumulatively clocks the working time of the machine tool (S13 to S15), outputs an oil feeding command to an oil feeding mechanism 25 by an oil feeding processing (S18) every time set working time Ws is clocked (S15: Yes), and the working time WT by the working time timer is reset every time the oil feeding command is outputted (S16). A stopping time timer clocks stopping time when the machine tool is continuously stopped (S19 to S21), outputs an oil feeding command to the oil feeding mechanism 25 by an oil feeding processing (S18) every time set stopping time is clocked (S21:Yes), and the timer is reset (S22). When the machine tool starts to work (S20: No), the time is reset every time (S26). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an automatic oil supply device for a machine tool, and particularly to an oil supply device that automatically and automatically supplies oil to a plurality of oil supply locations such as a rotating part and a sliding part.

  2. Description of the Related Art Conventionally, a machine tool such as a machining center is provided with an automatic tool changer, and a tool holder to which a cutting tool is attached can be detachably exchanged with a spindle of a machine tool by the automatic tool changer.

  Such a machine tool includes an X-axis moving device and a Y-axis moving device that move the spindle head in the orthogonal X and Y directions, a Z-axis moving device that moves up and down (Z-axis direction), and a spindle head. It is composed of a spindle drive device that rotates, an automatic tool changer, a pallet changer, and the like.

  By the way, this type of machine tool is generally equipped with an automatic oiling device, and the lubricating oil stored in the oil tank is periodically rotated and sliding parts of these moving devices by the operation of the oiling pump. Each is configured to be appropriately refueled. Therefore, it is possible to improve the machining accuracy of the workpiece by always facilitating the movement of the spindle head.

  For example, the Z-axis moving device will be briefly described. The guide rail is fixed vertically to the frame, and the spindle head can be moved up and down in the Z-axis direction along the guide rail through a plurality of sliding pieces provided on the frame. Installed. On the other hand, a nut member provided on the spindle head is threadedly inserted into a ball screw disposed in parallel with the guide rail.

  Therefore, when the ball screw is rotationally driven in both forward and reverse directions by the Z-axis motor, the spindle head is driven up and down in the Z-axis direction along the guide rail by the nut member and the ball screw. In this Z-axis moving device, smoothing is achieved when the spindle head moves up and down so that these sliding pieces and nut members are appropriately lubricated by an automatic oiling device.

  By the way, when the automatic lubrication device always lubricates the rotating part and the sliding part regularly regardless of whether or not the machine tool is in operation, the lubrication operation is performed even when the stopped state continues. Therefore, there is a problem that the lubricating oil is wasted. In view of this, an automatic fueling apparatus has been proposed in which a feeding operation is appropriately performed according to the operating state.

  For example, an automatic refueling control device described in Patent Document 1 includes one counter that functions as an elapsed time timer, a refueling frequency setting unit, a refueling time interval setting unit, and a short-term refueling interval setting unit during driving. A long-term lubrication interval setting unit and a lubrication time setting unit during stoppage are provided, and a plurality of lubrication ports provided in the sliding portion of the machine tool are configured to be appropriately lubricated by the operation of the lubrication pump. Refueling is not performed.

  That is, as shown in FIG. 14, if a preset short-term refueling time (for example, 10 minutes) has elapsed based on the timer value, and if it is in operation, refueling at each time point T32 and T40 ( (Shown by solid lines) are executed and the timer value is cleared. However, when the short-term refueling time has elapsed and the vehicle is stopped, refueling (illustrated by a broken line) is not executed at each time point T34 and T37, and the timer value is not cleared.

On the other hand, when the timer value exceeds the short-term refueling time and is within the long-term refueling time (for example, 120 minutes), refueling is executed at the time T35 when the operation is started (shown by a solid line) and the timer value is cleared. . In addition, refueling is forcibly executed at time T38 when the long-term refueling time has elapsed (illustrated by a solid line), and the timer value is cleared. Therefore, the number of times of refueling is reduced as much as possible so that the lubricating oil is not wasted.
Japanese Examined Patent Publication No. 4-36819 (Pages 2-4, Fig. 3)

In the automatic fuel supply control device described in Patent Document 1, since only one counter functioning as a timer is provided, depending on whether the short-term fuel supply time and the long-term fuel supply time are set, as shown in FIG. On the contrary, it increases, and the lubricating oil is wasted.

  For example, when the short-term refueling time is set to “10 minutes” and the long-term refueling time is set to “120 minutes”, the operation stops for about 7 minutes with respect to the operation time of about 4 minutes. In such a case, the refueling condition of “refuel when operating when short-term refueling time has passed” is applied, and each time point of T41, T42, T43, and T44 despite the short operation time. There is a problem in that lubrication is wasted unnecessarily because refueling is carried out for each operation time.

  An automatic oil supply device for a machine tool according to claim 1 is provided with an oil supply means for supplying lubricating oil to a rotating part and a sliding part of the machine tool, and an operation control means for operating the oil supply means. In the apparatus, the operation control means cumulatively measures the operating time of the machine tool, outputs an oil supply command to the oil supply means every time the set operation time is measured, and is reset every time the oil supply command is output, A stop time timer that counts the stop time during which the machine tool is continuously stopped and outputs a refueling command to the refueling means every time the set stop time is measured is provided.

  The operating time timer cumulatively measures the pure operating time of the machine tool and outputs a lubrication command to the lubrication means every time the set operating time is counted, so it is not affected by the stop time and the operating time Regardless of the length, refueling is performed by the operation control means every time the set operation time elapses.

  Furthermore, the stop time timer is provided independently of the operation time timer, and only the pure stop time when the machine tool is continuously stopped is counted, and refueling every time the set stop time elapses in the stop state. Since the oil supply command is output to the means, the operation control means executes the oil supply every time the set stop time elapses without being affected by the operation time.

  According to a second aspect of the present invention, in the automatic refueling device for a machine tool according to the first aspect, the stop time timer is reset every time the machine tool starts operation.

  An automatic refueling device for a machine tool according to a third aspect of the present invention is the automatic refueling device for a machine tool according to the first or second aspect, wherein the refueling command from the stop time timer is not output to the operation control means a plurality of times from the stop time timer. Is provided with a refueling command thinning means for thinning out.

  According to a fourth aspect of the present invention, there is provided an automatic fueling device for a machine tool according to the third aspect, wherein the fueling command thinning means has thinning number setting means for setting a number of thinnings for thinning the fueling command, and based on the set number of thinnings. It is comprised so that the oil supply command may be thinned out.

  According to the first aspect of the present invention, in an automatic oil supply device for a machine tool, comprising an oil supply means for supplying lubricating oil to a rotating part and a sliding part of a machine tool, and an operation control means for operating the oil supply means. Since the control means has an operating time timer and a stop time timer, the operating time timer measures only the pure operating time cumulatively and refuels every time the set operating time is measured, regardless of the length of the operating time. Since the command is output, it is possible to refuel every time the set operation time elapses without being affected by the stop time.

  Furthermore, the stop time timer provided independently of the operation time timer measures only the pure stop time during which the machine tool is continuously stopped. Therefore, it is possible to refuel every time the set stop time elapses without being affected by the operation time.

  According to the invention of claim 2, since the stop time timer is reset every time the machine tool starts operation, only the pure stop time during which the machine tool is continuously stopped is counted, and the machine tool Refueling becomes possible every time the operation stops and the set stop time elapses. Other effects similar to those of the first aspect are obtained.

  According to the invention of claim 3, since the operation control means is provided with the oil supply command thinning means for thinning out the oil supply command from the stop time timer so that the oil supply command is not continuously output from the stop time timer a plurality of times. When the stop time continues for a long period of time and when refueling is performed periodically, the refueling operation can be thinned out as necessary, and the effect of suppressing the refueling frequency can be increased. it can. Other effects similar to those of the first or second aspect are achieved.

  According to a fourth aspect of the present invention, the refueling command thinning means has thinning number setting means for setting a thinning number of times for thinning out the fueling command, and is configured to thin out a fueling command based on the set thinning number. Therefore, for example, by simply setting the number of times of thinning in advance, for example, by thinning out a refueling command that is repeated three times, any continuous number of times of refueling can be reliably omitted, and the effect of suppressing the refueling frequency can be further enhanced. Other effects similar to those of the third aspect are achieved.

  The automatic refueling device for a machine tool in this embodiment includes an operation time timer that cumulatively measures the operation time of the machine tool and a stop time timer that measures a continuous stop time of the machine tool, and the operation time and stop Regardless of the time, it is possible to appropriately supply oil at a time according to the operation time or the stop time, and to suppress wasteful consumption of the lubricating oil.

As shown in FIG. 1, the machine tool 1 rotationally drives the XY axis moving device 3, the Z axis moving device 4, and the main shaft 2A of the main shaft head 2 for moving the main shaft head 2 in the X direction and the Y direction orthogonal to each other. The spindle drive device 5, the tool changer 6, the pallet changer 7 and the like.

  The XY axis moving device 3 is configured so that the main shaft 2A on which the cutting tool 8 is mounted is individually separated in the X axis direction (left and right direction) by the X axis motor 10 and in the Y axis direction orthogonal to the X axis direction by the Y axis motor 11. It is designed to move. The Z-axis moving device 4 moves the main shaft 2A in the Z-axis direction (vertical direction) by the Z-axis motor 12.

  The Z-axis moving device 4 will be briefly described. As shown in FIG. 2, the guide rail 14 is fixed to the frame 1A in the vertical direction. The spindle head 2 is mounted so as to be movable up and down in the Z-axis direction along the guide rail 14 via a plurality of sliding pieces 15 provided thereon. On the other hand, a nut member 17 provided on the spindle head 2 is threadedly inserted into a ball screw 16 disposed on the frame 1A in parallel with the guide rail 14.

  Therefore, when the ball screw 16 is rotationally driven in both forward and reverse directions by the Z-axis motor 12, the spindle head 2 is driven up and down in the Z-axis direction along the guide rail 14 by the nut member 17 and the ball screw 16. By the way, the Z-axis moving device 4 is configured such that the lubricating oil 26 is appropriately supplied to the rotating parts and sliding parts such as the sliding piece 15 and the nut member 17 by an oil supply mechanism 25 described later. Smoothing is achieved when 2 moves in the XY direction and Z moves in the direction. However, the XY-axis moving device 3 described above can be similarly lubricated by an unillustrated lubrication mechanism.

  The spindle driving device 5 rotates the spindle 2A by a spindle motor 18 so that the cutting tool 8 attached to the spindle 2A can rotate. The tool changer 6 includes a tool magazine 20 that stores and holds a large number of cutting tools 8 in a plurality of tool pots.

  The tool magazine 20 is configured to be rotatable by a magazine motor 21 (see FIG. 1), and indexes one of the cutting tools 8 held in the tool pot to a position where it can be exchanged with respect to the spindle 2A. The tool magazine 20 further removes the cutting tool 8 from the main shaft 2A and returns it to the tool magazine 20, and then mounts the indexed cutting tool 8 on the main shaft 2A.

  The pallet exchanging device 7 rotates a horizontal work table 23 having a pallet 22 intermittently around a vertical axis by a pallet exchanging motor 24.

  Next, the oil supply mechanism 25 will be described. The oil supply mechanism 25 is provided exclusively for the XY axis movement device 3 and the Z axis movement device 4 described above, and these oil supply mechanisms 25 are configured in the same manner, so that the oil supply mechanism provided in the Z axis movement device 4 is provided. 25 will be described.

  As shown in FIG. 3, the lubricating oil 26 is stored in the oil tank 27. When the oil supply motor 28 is driven, the oil supply pump 29 connected to the oil supply motor 28 is operated, and the oil supply pump 29 sucks up and pressurizes the lubricating oil 26 in the oil tank 27 through the filter 30. It is supplied to the supply port of the switching valve 31.

  The switching valve 31 is normally switched to the drain side by the spring force of the spring 32. However, the switching valve 31 is switched to the supply side by receiving the pilot pressure that is part of the pressurized oil. Therefore, the pressurized oil is supplied to each of the plurality of oil supply points of the Z-axis moving device 4 described above via the switching valve 31 and the supply pipe 33.

  Here, the oil pressure switch 34 that operates with pressurized oil in the supply pipe 33 outputs an “L” level non-oil supply state signal in a low pressure state. However, when the pressure of the lubricating oil 26 rises to a predetermined pressure, the oil supply pressure switch 34 operates to output an “H” level oil supply state signal. Reference numeral 35 denotes a float switch.

  By the way, the NC device (numerical control device) 9 is integrally attached to the side portion of the machine tool 1 and is mainly composed of a computer. Then, next, the control apparatus 40 provided in the NC apparatus 9 and controlling the machine tool 1 will be described based on the block diagram of FIG.

  The control device 40 includes a microcomputer including a master CPU 41, a master RAM 42, a master ROM 43, and the like, an MS common RAM (master-slave common RAM) 44, and a microcomputer including a slave CPU 45, a slave ROM 46, a slave RAM 47, and the like. Yes. The master CPU 41 comprehensively controls the entire NC device 9. The master RAM 42 stores a plurality of types of NC control programs for machining control, various parameters necessary for machining control, and the like.

  The master ROM 43 stores a control program for automatic refueling control, which will be described later, and a set time table in which set times related to refueling are set as shown in FIG. In the set time table, “10 minutes” is set as the set operation time Ws, “120 minutes” is set as the set stop time Hs, and “15 seconds” is set as the set oil supply time Os.

  The master CPU 41 is further connected to an input means 48 (for example, a keyboard) for inputting various set values and a display means (for example, a liquid crystal screen) 49 for displaying an NC control program. These input means 48 and display means 49 are provided on an operation panel 50 provided on the front surface of the machine tool 1 as shown in FIG.

  The slave CPU 45 controls processing of various workpieces and replacement of the pallet 22. The slave ROM 46 stores in advance a motor drive program, constants, and the like for machining various workpieces and changing pallets. Further, the slave RAM 47 temporarily stores variables, flags, etc. during execution of machining control.

  The slave CPU 45 is further connected to the X-axis motor 10, the Y-axis motor 11, the Z-axis motor 12, the main shaft motor 18, the magazine motor 21, the pallet replacement motor 24, the oil supply motor 28, and the like. .

  Here, the MS common RAM 44 for connecting the master CPU 41 and the slave CPU 45 to each other writes and reads various information from both the master CPU 41 and the slave CPU 45, and provides command information and other information between the CPUs 41 and 45. Constant data and the like can be communicated with each other.

  Therefore, the master CPU 41 can control these motors 10, 11, 12, 18, 21, 24, 28 via the MS common RAM 44 and the slave CPU 45 based on data such as NC control programs and various parameters. is there.

  Next, a routine of automatic oil supply control executed by the control device 40 of the NC device 9 so as to output an oil supply command to the oil supply mechanism 25 of the Z-axis moving device 4 described above will be described based on the flowchart of FIG. . However, the symbol Si (i = 11, 12, 13,...) In the figure is each step. Here, an operation time timer, a stop time timer, and a refueling time timer, which will be described later, are each composed of a soft timer.

  When power is turned on to the machine tool 1, this control is started, and initial setting is first executed (S11). That is, in this initial setting, the operating time WT measured by the operating time timer, the stop time HT measured by the stop time timer, and the refueling time OT measured by the refueling time timer are cleared and the refueling flag OF Is reset.

  Next, when the Z-axis motor 12 is not in an operating state, that is, in a stopped state (S12: No), the stop time HT by the stop time timer is incremented by a predetermined minute time (S19), and the stopped state continues. In this case (S20: Yes), if the stop time HT does not coincide with the set stop time Hs, that is, if the set stop time Hs has not been reached (S21: No), S19 to S21 are repeatedly executed.

  By the way, when the operation of the Z-axis motor 12 is started before the stop time HT reaches the set stop time Hs (S20: No), the stop time HT measured by the stop time timer is cleared (S26). S13 and subsequent steps are executed. However, when the stop state continues and the stop time HT coincides with the set stop time Hs (S21: Yes), the stop time HT is cleared and the operation is performed with the reset of the stop time timer and the operation time timer. The time WT is also cleared (S22).

  Next, when the refueling flag OF is reset (S23: No), it is set (S25). However, if the refueling flag OF is set (S23: Yes), it is reset (S24). Here, S23 to S25 correspond to an oil supply command thinning means for thinning out the oil supply command from the stop time timer.

  Therefore, when the refueling command thinning means (S23 to S25) causes the refueling command from the stop time timer to continue, the refueling command is validated every other time, that is, the refueling command is continuously received. It is not output multiple times. Then, as will be described later, an oil supply process (see FIG. 7) is executed, and the oil supply mechanism 25 supplies oil to the rotating part and the sliding part of the Z-axis moving device 4 (S18).

  When the refueling process control is started, first, the content of the refueling flag OF is determined, and if the refueling flag OF is reset (S31: No), this control is immediately terminated, and the automatic refueling control S12 and later Is executed. However, if the refueling flag OF is set (S31: Yes), a refueling command is output to the refueling mechanism 25 (S32). That is, a drive signal for refueling is output to the refueling motor 28.

  Thus, as described above, the oil supply mechanism 25 starts the oil supply by the operation of the oil supply pump 29, the oil supply pressure switch 34 is turned ON, and the oil supply pressure switch 34 outputs the "H" level oil supply state signal. In the case (S33), the refueling time OT by the refueling time timer is incremented by a predetermined minute time (S34), and when the refueling time OT does not coincide with the set refueling time Os, that is, when the set refueling time Os has not been reached (S35). : No), S34 to S35 are repeatedly executed.

  By the way, when the refueling time OT reaches the set refueling time Os (S35: Yes), the refueling time OT counted by the refueling time timer is cleared (S36), the output of the refueling command is canceled (S37), and this control is performed. End and return to S12 of the automatic refueling control.

  On the other hand, in the automatic refueling control, when the Z-axis motor 12 is in the operating state (S12: Yes), the operating time WT by the operating time timer is incremented by a predetermined minute time (S13), and the operating state continues. If (S14: Yes) and the operation time WT does not match the set operation time Ws, that is, if the set operation time Ws has not been reached (S15: No), S13 to S15 are repeatedly executed.

  By the way, when the operation of the Z-axis motor 12 is stopped before the operation time WT reaches the set operation time Ws (S14: No), S19 and subsequent steps are executed. That is, at this time, the cumulative time measurement of the operation time WT by the operation time timer is stopped. However, if the operating state continues and the operating time WT matches the set operating time Ws (S15: Yes), the operating time WT is cleared with the reset of the operating time timer (S16).

  Next, the refueling flag OF is set so as to force refueling (S17), and the refueling process is performed (S18). In this case, since the oil supply flag OF is forcibly set, the oil supply operation is always executed by the oil processing control. Here, the automatic fueling device is composed of a control device 40, a fueling mechanism 25, and the like, and an operation control means is composed of automatic fueling control and the like.

  Next, the operation of the automatic refueling control controlled in this way will be described based on FIG. That is, the Z-axis motor 12 operates for 6 minutes from time T1 to time T2, stops for 60 minutes from time T2 to time T3, operates for 6 minutes from time T3 to time T5, A case will be described in which the operation is stopped for 130 minutes from the time T5 to the time T7 and then operated after the time T7.

  In this case, since the operation is started at time T1, the stop time HT is cleared. Thereafter, at time T4, the cumulatively timed operating time WT coincides with the set operating time Ws (10 minutes), so refueling is executed at this time T4. Further, at time T6, the stop time HT coincides with the set stop time Hs (120 minutes), so that refueling is executed at this time T6. Further, at time T8, the cumulatively timed operating time WT coincides with the set operating time Ws, so refueling is also executed at this time T8.

  However, the operating time timer is reset at time T4, time T6, and time T8, and the operating time WT is cleared accordingly. Further, the stop time timer is reset at time T1, time T3, time T6, and time T7, and the stop time HT is cleared accordingly.

  Next, another automatic refueling control operation will be described. As shown in FIG. 9, the Z-axis motor 12 operates for 4 minutes from time T11 to time T12, stops for 7 minutes from time T12 to time T13, and from time T13 to time T14. A case will be described in which the operation for 4 minutes is repeatedly executed a plurality of times.

  In this case, since the operation starts at time T11, the stop time HT is cleared. Thereafter, at time T16, the cumulatively timed operating time WT coincides with the set operating time Ws (10 minutes), so refueling is executed at this time T16. However, the operating time timer is reset at time T16, and the operating time WT is cleared each time accordingly. The stop time timer is reset at time T11, time T13, time T15, and time T18, and the stop time HT is cleared accordingly.

  As described above, the oil supply mechanism 25 that supplies the lubricant to the rotating part and the sliding part of the machine tool 1, the operation time timer, and the stop time timer are provided, and the operation time timer accumulates only pure operation time. Regardless of whether the operation time is timed or not, refueling is executed every time the set operation time is measured, so that refueling is executed every time the set operation time elapses without being affected by the presence or absence of the stop time. become. Therefore, when refueling is performed in relation to the operating time, the number of refueling operations can be suppressed, and wasteful consumption of the lubricating oil 26 can be reliably prevented.

  Further, the stop time timer provided independently of the operation time timer measures only a pure stop time, and outputs a refueling command to the refueling mechanism 25 every time the set stop time is counted, and the machine tool is reset. Since it is reset every time operation starts, every time the machine tool operation stops, refueling will be executed periodically whenever the set stop time elapses, and when refueling is performed in relation to the stop time In addition, useless consumption of the lubricating oil 26 can be reliably prevented.

  Furthermore, another automatic refueling control operation will be described. As shown in FIG. 10, the Z-axis motor 12 operates for 15 minutes from time T21 to time T23, and stops for a long time of 380 minutes (3 hours and 20 minutes) after time T23. The case will be described.

  In this case, since the operation starts at time T21, the stop time HT is cleared. Thereafter, at time T22, the cumulatively timed operating time WT coincides with the set operating time Ws (10 minutes), so the refueling flag OF is set, and refueling is executed at this time T22. Then, refueling should be executed at any time T24 when 120 minutes have elapsed from time T23, T25 when 120 minutes have elapsed since time T24, and T26 when 120 minutes have elapsed since time T25.

  However, although the refueling flag OF is set during refueling at time T22, refueling is not performed at the next time T24 because the refueling flag OF is reset. At the next time point T25, the refueling flag OF is set, so refueling is executed. At the next time point T26, the refueling flag OF is reset again, so that refueling is not executed.

  However, the operation time timer is reset at time points T22, T24, time point T25, and time point T26, and accordingly, the operation time WT is cleared each time. Further, the stop time timer is reset at time T24, time T25, and time T26, and the stop time HT is cleared accordingly.

  In this way, the lubrication command from the stop time timer is thinned out so that the lubrication command is not output multiple times continuously from the stop time timer. In such a case, the refueling operation can be thinned out as necessary, and the effect of suppressing the refueling frequency can be further enhanced. However, the thinning-out state of the refueling command is not limited to every other time, and thinning may be performed so that the refueling is performed every two or more times according to the set time of the set stop time Hs.

Next, a modified form of the embodiment will be described.
1] The above-described automatic refueling control may be partially changed so that a refueling command continuously generated during stoppage is appropriately thinned based on a preset number of thinnings. That is, when the “thinning number setting key” on the operation panel 50 provided in the machine tool 1 is operated, the thinning number setting control shown in FIG. 11 is executed.

  When this thinning count setting control is started, first, a thinning count setting screen is displayed on the display means 49 of the operation panel 50 (S41). Therefore, if necessary, the operator operates the numerical keys provided in the input means 48 to input and set the “thinning count” as necessary (S42), and this control is terminated.

  Then, the automatic oil supply control shown in FIG. 12 is executed. However, this automatic oil supply control is obtained by changing S11 to S11A, deleting S17 and S23 to S25, and adding S27 to S28 in the automatic oil supply control of FIG. 6 described above. In the initial setting executed when this control is started, the operating time WT timed by the operating time timer, the stop time HT timed by the stop time timer, the refueling time OT timed by the refueling time timer, and the refueling decimation counter The refueling decimation count value MK is cleared.

  Next, when the Z-axis motor 12 is in an operating state (S12: Yes), S13 to S16 are executed as described above, and an oil supply process is executed (S18). However, when the Z-axis motor 12 is in a stopped state (S12: No), as described above, after executing S19 to S22, the refueling decimation count value MK is incremented by 1 (S27). If the value MK does not match the preset “thinning count” (S28: No), S12 and subsequent steps are executed.

  When the refueling thinning count value MK, which is the number of times the set stop time has been counted, matches the “thinning number” (S28: Yes), the refueling process is executed (S18). The oil supply process control shown in FIG. 13 is obtained by deleting S31 and adding S38 in the oil supply process control of FIG. Therefore, in this refueling process control, after S32 to S37 are executed in the same manner as described above, the refueling decimation count value MK is cleared (S38).

  In this way, since the number of thinning out of the oil supply command is set, and the oil supply command is thinned out based on the set number of thinning out, the number of thinning out is reduced by, for example, thinning out the oil supply command three times in succession. By simply setting in advance, any continuous number of refueling operations can be reliably omitted, and the effect of suppressing the refueling frequency can be further enhanced.

2) The set operation time Ws, the set stop time Hs, and the set oil time Os used for the automatic oil supply control are determined by the input means 48 of the operation panel 50 according to the season, the type of the lubricating oil 26, or the workpiece. Depending on the type and processing operation, the operator may configure each setting.

3] In this embodiment, whether or not it is in the operating state is determined by the operation of the Z-axis motor, but it is determined that it is in the operating state when the operation start key provided on the operation panel 50 is pressed. You may comprise.

4) The present invention is not limited to the above-described embodiments and modifications, and those skilled in the art will implement various modifications to the above embodiments without departing from the spirit of the present invention. The present invention includes such modifications.

1 is a side view of a machine tool according to an embodiment of the present invention. It is a side view of an automatic tool changer and a Z-axis movement device. It is a block diagram of an oil supply mechanism. It is a block diagram of the control system of a machine tool. It is a graph which shows the setting content of a setting time table. It is a flowchart of automatic oil supply control. It is a flowchart of oil supply process control. It is a time chart in case an operation time and stop time exist irregularly. It is a time chart when an operation time and a stop time exist regularly. It is a time chart when a stop time extends over a long term. It is a thinning count setting control flowchart according to the first modification. FIG. 7 is a view corresponding to FIG. 6 according to a first modification. FIG. 8 is a diagram corresponding to FIG. 7 according to a first modification. FIG. 9 is a view corresponding to FIG. 8 according to the related art. FIG. 10 is a diagram corresponding to FIG. 9 according to the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine tool 4 Z-axis moving device 25 Oil supply mechanism 26 Lubrication oil 28 Oil supply motor 29 Oil supply pump

Claims (4)

In an automatic oiling device for a machine tool comprising an oil supply means for supplying lubricating oil to a rotating part and a sliding part of a machine tool, and an operation control means for operating the oil supply means,
The operation control means includes
An operation time timer that cumulatively measures the operation time of the machine tool, outputs a refueling command to the refueling means each time the set operation time is counted, and is reset every time the refueling command is output,
A stop time timer that counts a stop time in which the machine tool is continuously stopped, and outputs a refueling command to the refueling means each time a set stop time is measured; and
An automatic refueling device for a machine tool characterized by comprising:   The automatic refueling device for a machine tool according to claim 1, wherein the stop time timer is reset every time the machine tool starts operation.   The fuel supply command thinning means for thinning out the fuel supply command from the stop time timer is provided in the operation control means so that the fuel supply command is not continuously output from the stop time timer a plurality of times. The automatic refueling device for machine tools according to 2. The fuel supply command thinning means includes thinning number setting means for setting a thinning number for thinning out a fueling command, and is configured to thin out a fueling command based on the set thinning number. Automatic refueling device for the machine tool described.

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