JPH0436819B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for intermittently lubricating sliding parts, rotary bearing parts, meshing parts of gears, etc. of machines.

[Prior art]

Conventionally, intermittent lubrication to lubrication points using a total loss type lubrication system that cannot perform circulating lubrication is usually done using a constant discharge type distributor.
(2) When you want to refuel, operate the push button switch and operate the electric pump to refuel, (3) Turn on the power to the machine.
(4) Operation of the electric pump by operating a push button switch immediately before operation after the machine has stopped for a long time,
Repeat the stop several times to compensate for oil leaks during the stop, and then run the electric pump at regular intervals to refuel.
There was a lubrication method that combined (2) and (3).

[Problem that the invention seeks to solve]

The method of using a manual refueling pump or the method of refueling by operating an electric pump by operating a push button switch is inconvenient because the manual operation is required each time refueling is required, or the operation is troublesome, or the refueling operation may be forgotten. . In addition, in the method of refueling by operating an electric pump at regular intervals, the oil tank needs to have a large capacity because refueling is repeated at regular intervals even if the relevant refueling part is not in operation. The drawback was that lubricating oil was consumed unnecessarily.

SUMMARY OF THE INVENTION An object of the present invention is to provide a control device that determines the state of a machine using a counter, a timer, and a machine operation signal, and appropriately supplies oil according to the state of the machine.

[Means for solving problems]

The present invention has been made in view of the above-mentioned problems, and includes a control device for intermittently supplying lubricating oil to various parts of a machine. The machine is characterized by having a counter for setting the number of times of lubrication in the initial state, a timer for setting the lubrication interval time during machine operation, and a timer for setting the lubrication interval time when the machine is stopped.

[Effect]

The setting section 18 sets the number of times of refueling in the initial state after the power is turned on, the setting section 20 sets the time interval of refueling commands in the initial state, and the setting section 22 sets the refueling command when the corresponding refueling section is in operation. The setting section 24 sets the time interval of the refueling command when the relevant refueling section is in a stopped state, and the setting section 26 sets the refueling command time, and the set values are stored in the memories 28, 32, 38, 44 and 50.

In the initial state after the power is turned on, the memory 32 and the time counter 34 are compared, and the time counter 34 is
When the time counter 52 counts up, a refueling command is issued for the time set in the setting device 26 (until the time counter 52 counts up by comparing 0 after the stroke and the time counter 52), and when the time counter 52 counts up, the refueling command is stopped. Then, add 1 to the counter memory 30, compare the memory 28 and the counter memory 30, and repeat the above operation until the counter memory 30 counts up. When the counter memory 30 counts up, the memory indicates that the initial state of refueling has been completed. 14 to be memorized. After the initial state is completed, the memory 38 and the time counter 40 are compared, and when the time counter 40 counts up, it is checked whether the logic signal a corresponding to the start signal of the relevant section for refueling is being output, and the logic signal is being output. That is, if the machine is in operation, the time set in the setting device 26, that is, the memory 50, and the time counter 52 are compared, and a refueling command is issued for the time until the time counter 52 counts up.
When the time counter 52 counts up, the refueling command is stopped. If the refueling section is not in operation, that is, if no logic signal is output, a refueling command is not issued even if the time counter 40 counts up, but the memory 44 and the time counter 46 are compared, and the time counter 46 counts up. Then, similar to the above, a refueling command is issued for the time set in the setting device 26. Further, even if the time counter 40 is counting up and the time counter 46 is not counting up, if the relevant refueling section is operated, a refueling command is immediately issued for the time set in the setting device 26.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.
0 is a control device for a machine tool 78, and in the figure, only the oil supply portion of the machine tool 78 to which the present invention is applied is shown. Therefore, in the control device 10, only the components directly related to the present invention are shown.
Sliding surface 80A of bed 80 in machine tool 78
A saddle 81 is slidably mounted on the top and can be moved in the X direction in the figure by a feed screw 82 coupled to a feed drive motor 76. On the other hand, the sliding surface of the saddle 81 has reference numbers 84, 86, 8.
8, 90 and 92 provided on the male threaded portion are lubrication oil supply ports, through which a predetermined flow rate of oil is supplied from an oil supply pump 74 attached to the saddle 81.

Reference number 13 in the control device 10 is a drive unit of the X-axis drive motor 76, and the control device 1
A drive signal DS is generated in response to a signal from a movement command unit (not shown) within the drive unit 0. Also, the same unit 1
3 is a logic signal a while issuing the drive signal DS.
emits. Reference numeral 12 is a power on/off switch that starts the control device 10 and the machine tool 78, and generates a logic signal b in response to the power on/off state. Reference number 70 is a main part of the control device according to the present invention, and in this embodiment, a configuration using a microprocessor is shown. That is, the oil supply control section 70
The logic signals a and b are inputted from the control device 10, and as an output command, a refueling signal DR is issued to the pump drive unit 72 for driving the refueling pump 74. while reference numbers 18, 20,
Reference numerals 22, 24, and 26 are setting parts, and from the top, respectively, the number of refueling times setting part 1 in the initial state.
8. Refueling time interval setting section 20 in the initial state;
State where the relevant part drive signal DS exists (during drive)
Lubricating parts 84, 86, of the machine tool 78 in
Short-term refueling time interval setting unit 2 for 88, 90, and 92
2. After the initial state and in a state where the drive signal DS is not present (while stopped), the pump is driven in response to the long-term lubrication time interval setting unit 24 and one lubrication command for the lubrication applicable section. A refueling time setting section 26 to which the refueling signal DR to the unit 72 is given.
It is. Generally, the setting time in the setting section 24 is longer than that in the setting section 22. The setting section can be constituted by a digital setting device such as a thumbwheel switch. Or memory 28, 32, 38,
It is also possible to register the data in 44 and 50 in advance as data. Now, as mentioned above, the logic signals a, b and the setting sections 18, 20,
Setting values from 22, 24 and 26 are CPU58
memory 15, respectively via the line BUS.
16, 28, 32, 38, 44 and 50, respectively. memory 14
is set to "1" when the refueling state completes the initial state. The memory 30 stores the number of times the refueling is actually performed when the refueling is in the initial state. Reference numerals 34, 40, 46 and 52 are time counters which count the signal T from the time pulse generator 60 under each condition described below.
When the counters become equal to the set values stored in the memories 32, 38, 44 and 50, the count is increased, and the values in the memories 36, 42, 48 and 54 provided on the right side of each counter become "1".
It is now set to .

Reference numeral 62 is a generator of a reference clock signal CL, where CL is provided to the CPU 58 and the timing pulse generator 60;
At 0, the clock CL is frequency divided to generate the necessary timing pulses.

Reference number 66 is a refueling command memory, and when the refueling command memory 66 is "1", a drive signal DR is applied to the pump drive unit 72. Reference number 5
A program memory 6 stores a series of commands for instructing the operation of the CPU 58 in the refueling control unit 70, and is paired with the data memory DAM to cause the CPU 58 to execute refueling control. Includes initialization routine INITIAL and refueling sequence routine SEQ.

In Figure 2 A, B, and C, the CPU 58 performs the above routine.
This is a flowchart showing how to command refueling control according to INITIAL and SEQ. FIG. 2A is a flowchart showing the relationship between the initial value routine INITIAL and the refueling sequence routine SEQ.

When the power switch 12 is excited (ON), the CPU
58 is step (hereinafter abbreviated as STP) 1 and the content of memory 15 (hereinafter abbreviated as C15) is "1".
Check whether or not. If STP1 is NO
Move to STP2 initialization routine INITIAL. STP2
When this is completed, C15 is set to 1 in STP3, indicating that the initialization routine INITIAL has been completed. If YES in STP1, move to STP4. In STP2, memories 28, 32, 3 in Figure 1
Setting section 1 corresponding to 8, 44 and 50, respectively
8, 20, 22, 24 and 26 to set the preset values. Furthermore, memory 1
4, 36, 42, 48 and 54 are reset and their respective values are set to "0". Furthermore, counter memory 30 memory 66 and counters 34, 4
0, 46 and 52 are reset to "0". Initialization routine above
When INITIAL ends, the process moves to STP4, the refueling sequence routine SEQ.

2B and 2C are oil supply sequence routines, and in FIG. 2B, necessary oil supply processing is performed until the machine tool 78 reaches an initial state, that is, a state in which the machine tool 78 can be driven from its lubrication state.

In FIG. 2C, after the initial state is completed, the machine tool 78
The refueling process is performed when the refueling section is stopped and after the drive state or the initial state is completed.

When the initialization routine is completed in FIG. 2A and C15=1 is set, the start of FIG. 2B is started and the process moves to STP11. Now memory 14 is C14=
Since it is 0, move to STP12. If NO at STP11, that is, C14=1, it means that the initial state of refueling has been completed, and the process moves to FIG. 2C. Since the memory 54 of STP12 also has C54=0, the process moves to STP13.
If C54=1 in STP12, move to STP19.
At STP13 and STP14, the counter 34 and memory 36 are reset, and at STP15, C66=1 is set and the first refueling command DR is issued. The counter 52 starts counting at STP16 until the counter 52 matches the setting memory 50 at STP17.
Return to STP11, when the counter 52 reaches the set time, C50 = C52, and set C54 = 1 in STP18.
Since C54=0 becomes NO at STP12, the process moves to STP19. At STP19, the memory 66 is reset and the refueling command DR is stopped, and at STP20, the counter memory 30 is set to 1.
Add and move to STP21. In STP21, the contents of the counter memory 30 are compared with the refueling frequency setting memory 28, and the process moves to STP22 until C28=C30.
In STP22, since the memory 36 is now in a reset state, the process moves to STP23 and starts counting the counter 34. In STP24, the contents of the counter 34 are compared with the setting memory 32, and until the set time reaches the STP11.
Return to When counter 34 reaches the set time, STP25
Move to and set C36=1. When C36=1, STP22
becomes NO and moves to STP26STP27, counter 52
Then, the memory 54 is reset and the process returns to STP11, whereupon the second refueling is performed. This process is repeated until the condition of C28 = C30 is satisfied at STP21, and when C28 = C30, C14 =
1 is set and the initial state of refueling is completed. From then on
C14=1 is held and C14=0 becomes NO at STP11 and the process moves to the step shown in FIG. 2C.

FIG. 2C shows a lubrication processing routine when the machine tool 78 is in a stopped state after the machine tool 78 is in a driving state or in an initial state. Since the memory 42 has been reset by the initialization routine, STP31 has C42=0, so the process moves to STP32. In STP32, C48=0,
The counters 40 and 46 start counting at STP33 and STP34, and the counter 52 starts counting at STP35 and STP36.
Then, the memory 54 is reset, and at STP37, the counter 40 compares the contents with the setting memory 38, and returns to STP31 until the set time is reached. When the counter 40 reaches the set time, C38≦40, and C42 at STP38.
= 1 and STP39 sets counter 46 and setting memory 4
Compare the contents of 4 and STP31 until the set time is reached.
Return to. Since C42=1 at STP38, STP31
becomes YES and checks the contents of the memory 16 of the logic signal a corresponding to the machine drive signal DS at STP40.
If YES, proceed to STP44; if NO, proceed to STP41. STP41 checks whether the logic signal a is being output, and if a=1, that is, the machine is in the driving state, then STP42 sets C16=1 and passes through STP31.
Move on to STP44. If a=0 in STP41, that is, the machine is stopped, the process moves to STP32, waits for the counter 46 to reach the set time in STP39, and moves to STP43. STP32 because C48 = 1 in STP43
C48=1 and the process moves to STP44. If STP37
When the machine is driven while the condition of C44=C46 of STP39 is NO after the condition of C38≦40 is established, the logic signal a corresponding to the drive signal DS is output and STP40 becomes C16=1 and the process moves to STP44. Since the memory 54 is in a reset state in STP44, move to STP45 and C66
= 1, a refueling command DR is issued, the counter 52 starts counting at STP46, the counter 52 waits for the time set in the setting memory 50 at STP47, and when the set time comes, C54 is set to 1 at STP48. STP44
When C54=1, it moves from STP49 to STP54, refueling command memory 66, counters 40, 46, memory 4.
2, 48 and the memory 16 of the logic signal a are reset, and the process returns to STP31 to proceed to the next refueling.
As described above, after the counter 40 counts up, the process moves to STP44 according to two routines: when the machine is being driven and when the counter 46 counts up while the hazard is stopped. It is understood that this will be done. Further, if the machine is driven after the counter 40 has counted up but before the counter 46 has counted up, a refueling command is given immediately while the counter 46 is counting up. Furthermore, there is always an interval longer than the time set in the setting memory 38 between the stop of the refueling command and the next refueling command.

Figures 3 (1) to (5) show the lubrication pattern in the initial state after the power is turned on, the lubrication pattern executed depending on whether or not the machine is driven after the initial state, and the value of the timer count-up during the lubrication interval. This is a time chart showing.

FIG. 3(1) shows the presence or absence of the refueling command DR, and this is shown corresponding to whether the value C66 in the memory 66 is "0" or "1".

FIG. 3(2) shows the waveforms of the logic signal a corresponding to the drive command DS of the X-axis drive unit, depending on whether it is "0" or "1".

FIG. 3(4) shows waveforms corresponding to whether the value C42 of the memory 42 indicating the count-up state of the counter 40 is "0" or "1".

Furthermore, FIG. 3 (5) shows whether the value C48 in the memory 48 indicating the count-up state of the counter 46 is "0".
The waveforms are shown corresponding to 1".

The waveform in Figure 3 (3) corresponds to the refueling command after the initial state (5 refuelings in this event), and (2), (4), and (5).
is created from the logical state of That is, except for the initial state, it is obtained by the following logical formula.

C66=a・C42+・C48 In other words, the refueling command is given with the counter 40 counting up in the cases of α, β, γ, δ, and ε, and this corresponds to the case where a・C42 becomes 1. are doing. It is in the case of α ¹ and β ¹ that the refueling command is given as the counter 46 counts up. (At this time, C42 is 1, but a=0.) This corresponds to the case where C48 is 1.

〔Effect of the invention〕

As explained in the example, the machine status is determined based on the counter, timer, and operation signals of the relevant lubrication section, and lubrication is performed according to the machine condition to maintain the optimal lubrication state and to prevent unnecessary lubrication. Wasteful consumption of lubricating oil is suppressed, and the oil tank can also be made smaller. Also, if the tank capacity is the same, the effect is great, such as reducing the number of times oil needs to be refilled into the tank.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a refueling control device showing an embodiment of the present invention, Fig. 2 A, B, and C are flowcharts showing control commands for refueling, and Fig. 3 is a time diagram of each timer, memory, and drive signal. It is a chart diagram. 18...Refueling frequency setting device, 20, 22, 24...
... Lubricating gap time setting device, 26... Lubricating time setting device, 28, 32, 38, 44, 50... Memory of setting device, 30... Counter memory, 34, 40,
46, 52...Time counter, 56...Program memory, 58...CPU, 14,16,36,
42, 48, 54, 66... memory, 70... oil supply control device.

Claims (1)

[Scope of Claims] 1. In an automatic lubrication device that automatically supplies lubricating oil to rotating parts, sliding parts, etc. of a machine by turning on/off a motor of a lubrication pump, the driving motor of the machine operates. a refueling time interval setting unit and a refueling number setting unit that identify an initial state, a continuous operating state, and a stopped state from the operating state of the motor, and respectively set a refueling time interval and a refueling number of times in accordance with the operating state; A memory for storing the time interval and number of times of refueling set in the refueling time interval setting section and the refueling frequency setting section, and a refueling control device connected to the memory and controlling ON/OFF of the refueling pump motor. An automatic lubrication device featuring: 2. The automatic refueling device according to claim 1, wherein the refueling time setting section is a timer, and the refueling frequency setting section is a counter.