Machine tool

Abstract

To provide a machine tool capable of increasing the freedom of setting an oil supply interval for a slide member.SOLUTION: This machine tool comprises: a machining device that machines a workpiece; a workpiece automatic conveyor that slidably holds a conveyance device for conveying the gripped workpiece by a slide member; an oil supply device that supplies lubricating oil to the slide member at a predetermined oil supply interval; an operation display device that can receive an operation; and a control device. The control device includes an oil supply interval setting unit that sets the oil supply interval for the slide member by the oil supply device in accordance with the operation received by the operation display device.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a machine tool having an oil supply device capable of supplying lubricating oil. [Background technology]

[0002] Patent Document 1 describes a machine tool having an automatic workpiece transporter for transporting workpieces in and out of the machine. The automatic workpiece transporter transports workpieces in and out of the machine by moving a transport device along a slide member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 2024-29974 Summary of the Invention [Problem to be solved by the invention]

[0004] In machine tools, oil is supplied from an oil supply device at predetermined intervals to prevent deterioration of the automatic workpiece transporter. However, if the oil supply interval is fixed, it is not possible to flexibly change the oil supply interval in response to, for example, an increase in the use of the automatic workpiece transporter due to a sudden change in production plan or variations in the performance of the lubricating oil, which may accelerate deterioration of the machine.

[0005] SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a machine tool that allows for greater freedom in setting the oil supply interval for an automatic workpiece transporter. [Means for solving the problem]

[0006] In order to solve the above problems, the machine tool of the present invention comprises a processing device for processing a workpiece, an automatic work transport machine that slidably holds a transport device that transports a gripped workpiece using a slide member, an oil supply device that supplies lubricating oil to the slide member at predetermined oil supply intervals, an operation display device that can accept operations, and a control device, and the control device has an oil supply interval setting unit that sets the oil supply interval for the slide member by the oil supply device in accordance with the operation accepted by the operation display device. [Effects of the Invention]

[0007] According to the machine tool of the present invention, the interval at which the oil supply device supplies oil to the slide member is set in accordance with an operation received on the operation display device, which allows the user to independently set the interval at which the oil supply is supplied to the slide member, thereby increasing the degree of freedom in setting the interval at which the oil supply is supplied to the slide member. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating a configuration of a machine tool. [Figure 2] FIG. 1 is a block diagram of a machine tool. [Figure 3] 10 is a flowchart illustrating a process for changing the refueling interval of a refueling device. [Figure 4] FIG. 10 is a diagram illustrating an interval input screen. [Figure 5] FIG. 10 is a diagram illustrating a recommended value setting screen. [Figure 6] 4 is a flowchart illustrating a process executed by a control device. DETAILED DESCRIPTION OF THE INVENTION

[0009] (First embodiment) A machine tool 1 according to this embodiment will be described with reference to the drawings. FIG. 1 is a diagram illustrating the machine tool 1 according to this embodiment. For ease of explanation, the machine body cover is not shown in FIG. 1. The machine tool 1 is a turret-type lathe, and as shown in FIGS. 1 and 2, it mainly comprises a processing machine 10, a control device 11, a gantry loader 20, an operation and display device 13, and a fuel supply device 14.

[0010] The processing machine 10 has a spindle unit 16 and a turret unit 17. The spindle unit 16 is configured so that the center direction of its spindle is the machine width direction, which is the longitudinal direction of the bed 18. The machine width direction parallel to the spindle is defined as the Z axis, and the vertical direction perpendicular to the Z axis is defined as the X axis. A spindle chuck that grips a workpiece is rotatably mounted on the spindle unit 16, and rotation is imparted to the workpiece gripped by the spindle chuck by driving a spindle motor. The turret unit 17 has multiple tools attached to a tool rest, and a specific tool can be selected by swivel indexing according to the machining content. The turret unit 17 is attached to a device that can slide in both the X-axis and Z-axis directions relative to the bed 18. During machining, the turret unit 17 moves the swivel-indexed tool in the X-axis or Z-axis direction, allowing the workpiece gripped by the spindle chuck to be machined with the tool.

[0011] Machine tool 1 has workpiece stockers (not shown) arranged on the left and right outer sides of the body, and workpieces are transported to and from the machine by a gantry loader 20, which is an automatic workpiece transporter. In the present embodiment, a plurality of unmachined workpieces are stored in the workpiece stocker located on the left side of machine tool 1 in FIG. 1, and workpieces processed by machine tool 1 are recovered to the workpiece stocker located on the right side of machine tool 1. Gantry loader 20 is erected with support columns 21 fixed to both ends of bed 18 in the width direction, and a base beam 22, the length of which exceeds the width dimension of bed 18, is fixed to the top in a horizontal position parallel to the Z axis. A transport device 24, assembled so as to be suspended from base beam 22, is configured to be able to move along base beam 22.

[0012] Guide rails 23 parallel to the machine width direction are fixed to the beam 22, and the conveying device 24 is mounted on a traveling platform 25 that can slide on the guide rails 23. Hereinafter, the direction in which the guide rails 23 extend will be referred to as the traveling axis direction. A traveling servomotor is fixed to the traveling platform 25, and a pinion fixed to the rotation shaft of the guide rails 23 meshes with a rack fixed to the beam 22. Therefore, by controlling the rotation of the traveling servomotor, the pinion meshed with the rack rotates, allowing the traveling platform 25 to slide its sliding portion along the guide rails 23 and move in the traveling axis direction.

[0013] The transport device 24 further includes a lifting arm 26 mounted on the running platform 25 so as to be slidable up and down. Hereinafter, the direction in which the lifting arm 26 slides up and down will be referred to as the vertical axis direction. A rack is fixed to the lifting arm 26 in its longitudinal direction, and a pinion fixed to the rotation shaft of a lifting servo motor provided on the running platform 25 is engaged with the rack. The lifting arm 26 is moved up and down in the vertical axis direction and positioned at a predetermined height by controlling the rotation of the lifting servo motor. A robot hand 27 is attached to the lower end of the lifting arm 26, and in the transport device 24, the robot hand 27 is positioned inside or outside the machine by moving the running platform 25 and the lifting arm 26. The robot hand 27 includes a pair of chuck mechanisms, each capable of gripping and releasing a workpiece.

[0014] When a workpiece is machined by the machine tool 1, the robot hand 27 of the transfer device 24 moves along the travel axis direction to the workpiece stocker, picks up the workpiece, and carries the workpiece to the spindle device 16 inside the machine, where it is transferred between the spindle chuck and the workpiece. In the turret device 17, the tool on the tool post is rotated and indexed, and moved along the guide rail by the drive mechanism, and the tool is brought into contact with the workpiece rotating on the spindle device 16 to perform the specified machining, such as external turning. The machined workpiece is then gripped again by the robot hand 27 and transported to the workpiece stocker on the recovery side.

[0015] The oil supply device 14 supplies lubricating oil to the gantry loader 20. The oil supply device 14 has an oil tank filled with lubricating oil, a pressure pump that applies pressure to the lubricating oil in the oil tank, and an outlet port from which the pressurized lubricating oil is discharged. The outlet port of the oil supply device 14 is connected to an oil guide pipe, and oil can be supplied to the oil-receiving portion of the gantry loader 20 via this oil guide pipe. The oil supply device 14 is connected to the control device 11, and its operation is controlled by the control device 11.

[0016] As shown in Fig. 2, a CPU 31, a ROM 32, a RAM 33, and a non-volatile memory 34 are connected to the control device 11 of the machine tool 1 via a bus line. The ROM 32 stores a system program, control parameters, etc. executed by the CPU 31. The non-volatile memory 34 stores a machining program for the machine tool 1 and a workpiece transport program for controlling the transport of a workpiece by the transport device 24. The CPU 31 loads the program and parameters stored in the ROM 32 or the non-volatile memory 34 into the RAM 33, thereby reading out the program and executing predetermined processing in accordance with the read program. In this embodiment, the non-volatile memory 34 stores oil supply interval information indicating the oil supply interval for lubricating oil.

[0017] The control device 11 is provided with an I / O port 35, to which the spindle device 16, turret device 17, transfer device 24, operation and display device 13, and oil supply device 14 are connected via drivers. The operation and display device 13 is provided with various operation buttons and switches as well as a touch panel monitor, on which various information such as the operation screen display and operating status is displayed.

[0018] In machine tool 1 having the above configuration, lubricating oil is supplied from oil supply device 14 to the sliding parts of guide rails 23 and running platform 25 in order to reduce friction when workpieces are transported by transport device 24. Control device 11 monitors the date and time that has elapsed since the last time oil was supplied, and when it determines that the period indicated by the oil supply interval information stored in non-volatile memory 34 has elapsed, it causes oil supply device 14 to supply oil.

[0019] If the oil supply interval by the oil supply device 14 is constant, it will not be possible to flexibly respond to increased use of the gantry loader 20 due to sudden changes in production plans, variations in the lubricating performance of the lubricating oil, etc., and this may accelerate deterioration of the sliding parts of the guide rails 23 and the running platform 25. On the other hand, if the control device 11 automatically sets the oil supply interval, it will not be possible to set a desirable oil supply interval taking into account factors that the control device 11 cannot determine, such as judgment based on the user's experience, predictions of future production plans, or the remaining amount of lubricating oil. Therefore, the machine tool 1 according to this embodiment is configured so that the oil supply interval for the transport device 24 can be freely set by the user.

[0020] Next, a process will be described when the user changes the refueling interval by operating the operation display device 13. Fig. 3 is a flowchart illustrating the process executed by the control device 11 when the user selects and operates a menu item related to the refueling setting for the gantry loader 20 from among the setting menus displayed on the operation display device 13.

[0021] In step 10, the control device 11 displays a refueling interval setting screen 41 on the operation and display device 13. Hereinafter, step will also be abbreviated as "S." As shown in FIG. 4, the refueling interval setting screen 41 is a screen that accepts operations related to setting the refueling interval for the gantry loader 20, and includes an interval input field 42, which is an example of a first icon, an automatic setting icon 43, which is an example of a second icon, and a confirmation icon 44. The interval input field 42 is an icon that accepts input of an input value indicating the refueling interval by operation, and before a new input value is input, a value indicated by the refueling interval information stored in the non-volatile memory 34 (in this example, "30," which indicates one month) has been input.

[0022] Assume that the user operates the operation display device 13 to input a new input value into the interval input field 42. Thereafter, when the user operates the confirmation icon 44 on the refueling interval setting screen 41, the control device 11 detects the operation of the confirmation icon (S16: YES), proceeds to S17, and updates the refueling interval information stored in the non-volatile memory 34 to the input value in the interval input field 42. In this example, assume that the input value in the interval input field 42 has been changed from "30" to "25," which indicates 25 days. Therefore, the control device 11 updates the value "30" indicated in the refueling interval setting information stored in the non-volatile memory 34 to "25," and sets the refueling interval from "once every 30 days" to "once every 25 days." In this embodiment, the process executed by the control device 11 in S17 implements a refueling interval setting unit.

[0023] On the other hand, when the control device 11 detects that the user has operated the automatic setting icon 43 (S11: YES), the control device 11 proceeds to S12 and calculates a recommended value for the lubrication interval based on the "cumulative distance information" stored in the non-volatile memory 34. In this embodiment, the cumulative distance information is an accumulated value of the travel distance traveled by the conveyance device 24 in the traveling axis direction on the guide rail 23 over a predetermined period of time. As will be described later, the control device 11 stores travel distance information indicating the travel distance traveled by the conveyance device 24 on the guide rail 23 in one day in association with the date each time a workpiece is machined. The control device 11 uses, as the cumulative distance information, a value obtained by accumulating travel distance information for a predetermined period (e.g., 30 days) from the time the user operated the automatic setting icon 43. Calculating the travel distance for 30 days is one example of the cumulative distance information, and the cumulative distance information may also be calculated by accumulating travel distances for periods shorter or longer than 30 days. The method by which the control device 11 acquires the travel distance information indicating the travel distance for one day will be described later.

[0024] The control device 11 stores a table in the nonvolatile memory 34 that records the correspondence between accumulated distance information and refueling intervals, and calculates the recommended refueling interval from the accumulated distance information using the correspondence stored in the table. By referencing the table, the control device 11 sets the recommended refueling interval to a shorter interval as the accumulated distance information becomes larger than the assumed reference value. On the other hand, if the accumulated distance information is smaller than the assumed reference value, the control device 11 sets the recommended refueling interval to the initial value (e.g., 30 days). Alternatively, the recommended refueling interval may be set to a longer interval as the accumulated distance information becomes smaller than the assumed reference value.

[0025] In S13, the control device 11 causes the operation display device 13 to display a recommended value display screen 50 including the calculated recommended value for the lubrication interval. As shown in Fig. 5, the recommended value display screen 50 includes a text area 51 including the recommended value for the lubrication interval, a positive icon 52, and a negative icon 53. By displaying the text area 51 including the recommended value "XXX" calculated in S12 on the recommended value display screen 50, the user can understand what value to input into the interval input field 42.

[0026] The affirmative icon 52 is an icon that is operated by the user when the calculated recommended value is to be automatically entered into the interval input field 42 of the refueling interval setting screen 41. When the control device 11 detects that the user has operated the affirmative icon 52 (S14: YES), the control device 11 proceeds to S15 and displays the refueling interval setting screen 41 with the recommended value calculated in S12 entered into the interval input field 42. When the control device 11 detects that the user has operated the confirm icon 44 (S16: YES), the control device 11 updates the value of the refueling interval information stored in the non-volatile memory 34 to the recommended value that is the input value in the interval input field 42.

[0027] Even after the recommended value has been input in the interval input field 42, the user can change the recommended value input in the interval input field 42 to a desired input value for the oil supply interval by operating the operation display device 13. The recommended oil supply interval is a value calculated according to the travel distance of the conveyance device 24, and is an oil supply interval that can suppress deterioration of the sliding parts of the guide rail 23 and the running platform 25. Therefore, the user can input a new input value in the interval input field 42 by correcting the recommended value based on the recommended value input in the interval input field 42, taking into consideration their own experience and the status of the machine tool 1. Thereafter, when the control device 11 detects that the user has operated the confirmation icon 44 (S16: YES), in S17, the control device 11 updates the oil supply interval information stored in the non-volatile memory 34 to the new input value input in the interval input field 42.

[0028] When the control device 11 detects operation of the negation icon 53 on the recommended value display screen 50 (S14: NO), the process returns to S10 and causes the operation display device 13 to re-display the refueling interval setting screen 41. The negation icon 53 is an icon that is operated by the user when the recommended value is not to be automatically entered into the interval input field 42 on the refueling interval setting screen 41. Therefore, the value indicated by the refueling interval information will be entered into the interval input field 42 on the re-displayed refueling interval setting screen 41. When the user operates a close icon (not shown) on the refueling interval setting screen 41, the control device 11 hides the refueling interval setting screen 41 and ends the processing of FIG. 3.

[0029] Next, a method will be described in which the control device 11 acquires travel distance information indicating the travel distance of the transport device 24 for one day. As already explained, the travel distance information is information used to calculate the accumulated distance information in S12 of Fig. 3. Fig. 6 is a flowchart illustrating the procedure of processing executed by the control device 11 when a workpiece is machined by the machine tool 1.

[0030] First, when the user operates the operation display device 13 to start up the machine tool 1 to machine a workpiece, the control device 11 acquires the travel distance of the transport device 24 required to machine one workpiece in S20 by expanding and reading the workpiece transport program into RAM 33. Specifically, the control device 11 reads all parameters that indicate the travel distance of the transport device 24 in the traveling axis direction, which are specified in the workpiece transport program, and acquires the sum of the read parameters as information indicating the travel distance of the transport device 24 required to machine one workpiece.

[0031] In S21, the control device 11 updates the travel distance information by adding the acquired information to the travel distance information already stored in the non-volatile memory 34. The control device 11 stores the travel distance information in the non-volatile memory 34 in association with the date. This allows the control device 11 to read from the non-volatile memory 34 travel distance information from a predetermined period in the past after the automatic setting icon 43 was operated in S12 of FIG. 3, as already described, and to acquire accumulated distance information by accumulating the read travel distance information. In this embodiment, a usage status storage unit is realized by the processes executed by the control device 11 in S20 and S21.

[0032] In S22, the control device 11 machines the workpiece in accordance with the workpiece transport program that has been expanded in RAM 33 and the machining program that has been read from the non-volatile memory 34. Note that the machining of the workpiece in accordance with the workpiece transport program and the machining program has already been described. When the control device 11 completes S22, it ends the processing of Fig. 6. Note that if there are still unmachined workpieces in the workpiece stocker after that, the processing shown in S20 to S22 by the machine tool 1 is repeated, and in S21, the travel distance information that indicates the travel distance for one day by the transport device 24 is updated.

[0033] The present embodiment described above can achieve the following effects. Control device 11 of machine tool 1 sets the intervals at which oil supply device 14 supplies oil to sliding parts of guide rail 23 and running platform 25, in accordance with operations received at operation display device 13. This makes it possible to flexibly set oil supply intervals that can suppress deterioration of machine tool 1, taking into consideration the user's experience and the state of machine tool 1, thereby increasing the degree of freedom in setting oil supply intervals.

[0034] The control device 11 displays a refueling interval setting screen 41 on the operation display device 13, which receives input of a value indicating a refueling interval, and sets the refueling interval by the refueling device 14 according to the input value input to the refueling interval setting screen 41. This allows the user to intuitively input the refueling interval while visually checking the refueling interval setting screen 41.

[0035] The control device 11 stores accumulated distance information, which is an accumulated value of the distance traveled by the conveying device 24 in the traveling axis direction. The control device 11 calculates a recommended lubrication interval based on the stored accumulated distance information and displays the calculated recommended value on the recommended value display screen 50. This allows the user to input an input value indicating the lubrication interval on the lubrication interval setting screen 41 based on the recommended value displayed on the recommended value display screen 50, thereby assisting the user in inputting the lubrication interval.

[0036] The control device 11 stores, as the usage status, information on the cumulative distance traveled by the conveyance device 24 in the travel axis direction on the guide rail 23. The control device 11 calculates a recommended lubrication interval based on the stored cumulative distance information. This allows the recommended value to be calculated using the travel distance of the conveyance device 24, which affects deterioration of the sliding parts of the guide rail 23 and the running platform 25, and therefore allows the control device 11 to calculate a recommended lubrication interval appropriate for suppressing deterioration of the sliding parts of the guide rail 23 and the running platform 25 and display it on the operation and display device 13.

[0037] The control device 11 displays an interval input field 42 for receiving input of a value indicating the refueling interval, and an automatic setting icon 43 for displaying a recommended value for the refueling interval, on the refueling interval setting screen 41. When the control device 11 detects operation of the automatic setting icon 43, it displays a recommended value display screen 50 including the recommended value for the refueling interval. This allows the user to operate the automatic setting icon 43 and have the recommended value displayed on the operation display device 13 only when the user requires the recommended value to be displayed.

[0038] (Modification of the first embodiment) The number of times the conveyance device 24 has been used in a predetermined period may be used as the usage status of the conveyance device 24 used to calculate the recommended lubrication interval. The number of times the conveyance device 24 has been used in a predetermined period can also be referred to as the frequency of use. In this modification, each time the machine tool 1 is used, the control device 11 stores usage count information indicating the number of times the conveyance device 24 has been used in a day in association with the date in the non-volatile memory 34. Note that the use of the machine tool 1 is not limited to the conveyance device 24 moving on the guide rails 23 in conjunction with workpiece machining, but also includes the conveyance device 24 moving on the guide rails 23 regardless of workpiece machining. The conveyance device 24 moving on the guide rails 23 regardless of workpiece machining means, for example, the conveyance device 24 moving in the travel axis direction according to the conveyance program to check the operation of each part of the machine tool 1.

[0039] The control device 11 stores a table in the non-volatile memory 34 that records the correspondence between cumulative count information indicating the cumulative value of the number of uses and the refueling interval. In S12 of FIG. 3, the control device 11 calculates the cumulative count information by accumulating the number of uses over a predetermined period. Then, the control device 11 calculates the recommended refueling interval from the number of uses indicated by the cumulative count information using the correspondence stored in the table. For example, the number of uses information used to calculate the cumulative count information is information about the number of uses over a predetermined period of time prior to the time the automatic setting icon 43 was operated by the user. By referring to the table, the control device 11 sets the recommended refueling interval to a shorter interval as the number of uses indicated by the cumulative count information increases relative to the expected reference value. On the other hand, if the number of uses indicated by the cumulative count information is less than the expected reference value, the control device 11 sets the recommended refueling interval to the initial value. Alternatively, the recommended refueling interval may be set to a longer interval as the number of uses indicated by the cumulative count information decreases relative to the expected reference value.

[0040] In the machine tool 1 according to the modified example, similar to the machine tool 1 shown in the first embodiment, it is possible to set an oil supply interval that can suppress deterioration of the machine tool 1, taking into consideration the user's experience and the state of the machine tool 1, thereby increasing the degree of freedom in setting the oil supply interval. Furthermore, in the machine tool 1 according to the modified example, there is no need to read parameters from the workpiece transport program when acquiring use count information, and the processing load on the control device 11 can be reduced.

[0041] (Other embodiments) The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention. The automatic workpiece transporter is not limited to a gantry loader, and may be configured to move a multi-axis robot along a guide rail. In this case, the machine tool has a guide rail parallel to the Z-axis direction inside the machine body cover. The multi-axis robot is slidably held on the guide rail via a running platform, allowing it to move in the running axis direction inside the machine body cover.

[0042] The slide member may be any member that slidably holds the transport device, and may include not only a guide rail or a sliding portion of a running platform but also a ball screw. [Explanation of symbols]

[0043] 1...machine tool, 11...control device, 13...operation display device, 14...oiling device, 23...guide rail, 24...transport device, 25...traveling platform, 41...oiling interval setting screen.

Claims

1. a processing device for processing the workpiece; an automatic workpiece transporter that slidably holds a transport device that transports a gripped workpiece by a slide member; an oil supply device that supplies lubricating oil to the slide member at predetermined oil supply intervals; an operation display device capable of accepting operations; a control device; The control device a lubrication interval setting unit that sets an interval between lubrication operations performed by the lubrication device on the slide member in accordance with an operation received by the operation display device;

2. The oil supply interval setting unit displaying a fuel supply interval setting screen on the operation display device for receiving input of an input value indicating the fuel supply interval; 2. The machine tool according to claim 1, wherein an input value input on the oil supply interval setting screen is set as the oil supply interval.

3. The control device a usage status storage unit that stores usage status of the transport device; The oil supply interval setting unit 3. The machine tool according to claim 2, wherein the recommended value of the oil supply interval is calculated in accordance with the usage status of the conveying device stored in the usage status memory unit, and the calculated recommended value is displayed on the operation display device.

4. The usage status storage unit storing an integrated value of a moving distance that the transport device has moved via the slide member in a predetermined period as a usage status of the transport device; The oil supply interval setting unit The machine tool according to claim 3 , wherein the recommended oil supply interval is calculated in accordance with the stored integrated value of the travel distance.

5. The usage status storage unit storing the number of times the transport device has been used within a predetermined period as the usage status of the transport device; The oil supply interval setting unit The machine tool according to claim 3 , wherein the recommended oil supply interval is calculated in accordance with the stored number of times the transport device has been used.

6. The oil supply interval setting unit displaying, on the refueling interval setting screen, a first icon for receiving an input of an input value indicating the refueling interval and a second icon for displaying a recommended value of the refueling interval; The machine tool according to claim 3 , wherein when the second icon is operated, the recommended oil supply interval is displayed on the operation display device.

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