JPS5989899A - Method and device for feeding lubricating oil - Google Patents

Abstract

PURPOSE:To feed oil generally in proper quantities during operation and minimize the quantity of mist by providing a timer circuit through which feeding intervals are gradually increased from the start of operation, and a circuit through which constant intervals are repeated after said constant interval is obtained, and supply much amount of oil at the start of operation and gradually reducing the amount so as to transfer the oil supply to the regular condition. CONSTITUTION:Timers TR1, TR2...TRi...TR5 are provided. When a starting button PB1 is pressed, the timer TR1, which determines the rotating time of an oiling motor 5 operates, feeding oil spray to the rolling bearings of the internal grinding wheel shaft 3. After set time for the timer TR1 is over, the timer TR2 operates, stopping the rotation of the motor 5 and stopping the feeding, and the timer TR3 operates. The spray feeding of oil is carried out each time after the set time T1 for the timer TR3 is over, after a specified time T2 which is longer than the timer-TR3 time, is over, and after the time T3 which is longer than the time T2, is over. And, after the specified time T3, a cycle similar to the previous one is carried out, thereby establishing oil supply to the wheel shaft during its normal rotation.

Description

[Detailed Description of the Invention] Technical Field The present invention is applicable to machine tools, particularly spindles of lathes, spindles of machining centers, and sharpening machines of grinders. 1. Lubricating force method and J/ν setting suitable for high-speed rotation rolling bearings such as shafts. This is what I am trying to do with h1 and L2.

Conventional technology: Oil and air temperature for high-speed rolling bearings? The Saeki method has recently begun to be adopted. The amount of lubricating oil required during steady operation of the grinding wheel shaft, etc. is extremely small, allowing stable and trouble-free operation. In this state, the amount of mist generated is extremely small, so there is no particular problem in terms of worker hygiene. As mentioned above, it is desirable to keep the amount of lubricant supplied to the minimum necessary level, but if the situation continues as it is, the amount of lubricant supplied will be insufficient at the beginning of restarting operation after stopping, resulting in unstable supply and the problem of poor lubrication. Occurs. For this reason, in the conventional fixed-rate supply system in which the lubrication cycle is constant, consisting of a constant lubrication time, depressurization time, and rest time, even during steady operation, a larger amount of lubricant is supplied than the required amount of lubrication to provide lubrication at the beginning of operation. I was trying not to run out.
If this is done, lubricating oil will be wasted and consumed during normal operation, and a large amount of mist will be generated, which is not favorable for the hygiene of the workers.

Purpose Therefore, the present invention has been made in order to eliminate the above-mentioned drawbacks, and aims to provide a sanitary and rational supply method and device that contributes to resource saving. The first invention is characterized in that the amount of lubricating oil supplied is large at the beginning of operation, and is reduced as time passes, and during steady operation, the amount of lubricating oil supplied is as small as necessary.

The second invention is an apparatus for carrying out the method of the first invention, which comprises: a distributor that sprays oil onto a bearing; a pump that sends pressure lubricating oil to the distributor; and a motor that rotates the pump.
A lubricating oil supply device comprising: a timer circuit that sequentially lengthens the supply interval from the beginning of operation; and a circuit that repeats the same interval after a predetermined interval.

Example Embodiments of the present invention will be described below based on the drawings.

The illustrated inner grinding wheel head 1 is equipped with rolling bearings on the front and rear sides, which are carefully selected and used with high accuracy in terms of the absolute dimensions and sphericity of each rolling ball, and the inner grinding wheel 2 is provided at the tip. An inner grinding wheel shaft ♂ is fixed to the inner grinding wheel and rotated by a drive device (not shown). The front and rear bearings are supplied with a spray of lubricant oil, which is a mixture of compressed air and pressure lubricant oil sent from the lubricant supply pump 4 rotated by the rotation of the motor 5 to the distributor B.

Next, in FIGS. 2 and 4 showing circuit diagrams, PBL
is the start button, pB2 is the stop button, CRs,
CR2...CR1...CRlm is a relay,
7'7?1, T7?2...TR1...TRr
, represents a timer. Next, control of the motor stop time shown in FIG. 2 will be explained with reference to a circuit diagram using a plurality of timers and a timing circuit diagram shown in FIG. 6. Start button PB1
When is pressed, the start/stop circuit is energized by 1 L and -CR1, the a contact CR1ai is closed and the circuit is held at 1, and the timer TR1 of 2 is activated in the refueling timer circuit which determines the rotation time of the refueling motor 5. Also, the other a contact CI of relay CR1? 1-t, 2 is the relay CI of 8 on the NJ refueling motor rotation 1jjl path? Excite 2 and 1-.
A contacts CR2 to a1 are closed, and the circuit of the motor 5 of the lubricating oil supply pump 4 is rotated, and the supply pump 4 sends pressure lubricating oil to the distributor 6, and the internal grinding wheel spindle 3 is rotated by the compressed air. Supply spray to the bearing. Timer T
After the time R1 has elapsed, contact TR1-ai is temporarily closed, and relay CR6 of 4 is energized in the motor stop auxiliary circuit.
A contact CR6-al closes to hold the circuit and energizes the depressurizing solenoid, and R2, which determines the energization time, is activated. Also, Lire CR6
(y) Other a contact CR3-a2'f: closed 11 relays CR4 are deenergized in the circuit of motor stop circuit L1, b contact CR4-bl opens and 2 is opened in the refueling timer circuit, and other b contact CR4- b) also opens, opening 3 to the motor rotation circuit, stopping the rotation of the motor 5, and stopping the supply. Also, when relays CR7 and -C7 close, 12
Relay CR5 is energized and a contact CI? 5-al is closed, the motor stop circuit L1 is held from then on, and the timer TR3 is activated. After the time set by timer 1'R2 has elapsed, contact 7°R2bl is temporarily opened, and relay CR3 of 4 in the motor stop auxiliary circuit is demagnetized, and relay 5 of the depressurizing solenoid circuit is fully opened.

After time T1 of timer TR5 has elapsed, contact 1 "R5-al"
is closed and 14 relays CR6 are energized, b
Contact CR6-bl opens and 11 relays CR4 are connected to the circuit.
Demagnetize. Due to this demagnetization, b contact CR/l-bl
is closed, timer TR1 of 2 is activated in the refueling timer circuit, B contact CR4-b2 is closed, 5 (1) IJt, -C7?2 is energized and A contact CR2-ai is closed. That is, after T1, the motor 5 is rotated again.

The pump 4 is rotated to send pressure lubricating oil to the distributor 6 and spray oil to the bearing. After that, the a contact cR6-al is closed due to the excitation of the relay CR6. After the time set by timer TR1 has elapsed, contact TRai is temporarily closed and relay C of 4 is connected to the circuit.
At the same time R3 is energized, current is applied to the pressure-reducing thread/id circuit of 5, and timer TR2 of 6 is activated in the circuit. A contact CRY-a2 closes but timer T
R6 does not play the role of timer B, and by closing the a contact CR5-a3, the a contact and the point CB6-al have already been closed, so 21 relays ('R7 is energized and the b contact CR7-bl is Open refueling timer circuit 12
Kavt'l Emission FE t'L, b W Point CR7-b2
6 is opened to the motor rotation circuit 11, the pressure pump is stopped, and oil supply is stopped. A contact CR3-a3
By closing, relay CRF3 of circuit A22 is energized, a contact CR8-al is closed, and after that, motor stop circuit L2 is held. Further, timer TR4 of circuit 1 (26) is activated, and after a certain period of time T2, which is longer than timer TR3, has elapsed, contact 7'R4-al is closed and relay -CR9 of 24 is energized in the circuit. With this excitation, b contact CR9
Open -bl and demagnetize relay CR7, b contact CR7-bl
is closed and timer TR1E of 2 is activated in the lubrication timer circuit, B contact CR7-b2 is also energized and 6 relay CR2 is energized in the same motor rotation circuit, and A contact CR2-&1 is closed, motor 5 is rotated and the bearing is sprayed with lubrication. .
Also, the a contact CR9-al closes. Timer TR1
After the elapse of time, contacts TR1- and ai are temporarily closed, relay CR7, 4, is energized in the motor stop auxiliary circuit, solenoid 5 is energized, and timer TR2, 6, is activated in the depressurizing solenoid circuit. Ru.

When relay CR6 is energized, a contact CR6-a3 closes, but timer TR4 does not function as a timer and a contact C7?3-a closes.
Since the a contact CR9-al is already closed by closing the a contact CR9-al, the relay CR1Q of 61 is energized in the circuit of the motor stop circuit L3, and the a contact CR10-al is closed and a part of the motor stop circuit L6 is held. Thirty-two timers TR5 are activated in the circuit. Also, b contact C
7?10- 2 liters of 1M in the bl bin; ft
B contacts CR1°-b2 are also opened, relay CR2 of the motor rotation circuit is demagnetized, the motor 5 is stopped, and oil supply is stopped. Further, after the time set by timer T7?2 has elapsed, relay C7?3 of No. 4 in the b contact TR2-bl force S opening circuit is temporarily demagnetized and relay No. 5 of the circuit is opened. After a certain period of time T3 of timer TR5, which is longer than 12 cycles of timer TR4, contact TR5-ai temporarily closes and 53 relay CR11 is energized in the circuit. With this excitation, b contact CR11-bl
is opened and relay 31 CR10 is demagnetized in the circuit. For this reason, relay CR10 (7J b contact CR10-b1
2 timer TR1 is activated in the MM tie Y circuit, and the b contact CR1゜-b2 is also closed, and the 3 relay CR2 is energized in the motor rotation circuit, and the a contact CR'; 2-a
i is closed and the motor 5 is rotated again to carry out spray refueling. Timer TI? After a period of time 1 has elapsed, contact TR1-al is temporarily closed, relay CR3 of 4 is energized in the motor stop auxiliary circuit, voltage 5 is energized to the depressurizing solenoid circuit, timer TR2 of 6 is activated, and after a certain period of time the circuit is closed. 4. 5 will be released. When the a contact CR6a4 closes again, the relay CR10 is energized and the b contact c
R1o-bl opens, opening 2 to the refueling timer circuit, and b contact CR10-b2 also opens, opening 6 to the motor rotation circuit.
Relay CR2 is demagnetized, motor 5 is stopped, and oil supply is stopped. Furthermore, when the a contacts CR3-a4 are closed, the timer TR5 is activated, and after a certain period of time T8, the same cycle as the previous one is executed. That is, oil supply is performed during steady rotation of the grindstone shaft. When the operation is no longer necessary, the stop button PB2 is pressed to cut off the circuit. This interruption causes timers TR3 and TR4 to recover.

Next, in explaining the control of the motor stop time in FIG. 4 of another embodiment with reference to the circuit diagram using one timer and the timing diagram of FIG. 5, only the operating parts that are different from the previous embodiment will be explained. explain. When the a contact C7?1-a2 of the relay CR1 is closed by pressing the start button PB1, the relay CR2 is energized and the b contact CR' is activated before the timer 7'7?3 of the motor stop time setting circuit M42 is activated. 2
bl opens and relay CR2 is demagnetized, B contact CR2-bl closes and timer TR3 of circuit M42 operates, and after a certain period of time T1 determined by the value of resistor R3 has elapsed, C
Contact TRI, -a1 of R timer TR5 closes circuit M
41 relay CR12 is temporarily excited and a contact CR
12-&1 closes. Also, the a contact C of relay CR5
R3-a2 is closed and motor stop circuit N1 circuit Δ(
8 by energizing relay CR5 of 12. Thereafter, the motor stop circuit N1 is held at the contact CR5-&1. A contact CR
Since 12-al is closed, relay CR of circuit M13
6 is excited. A contact CR ('.

-al closes and holds circuit M16 from now on, opens contact b CR6-bl, and relays of circuit &11 (, 'R
Demagnetize 4. Therefore, the blze point CR4-b1. CR
452 is closed, timer 7'R1 of the refueling timer circuit xt2 is activated, relay CR2 of the motor rotation circuit M3 is energized, and a contact CR2-al is closed to rotate the motor 5 and perform refueling. The b contact CR2-bl opens and the circuit M42 is opened. After a certain period of time of timer TR1 has elapsed, contact T7?1-al is temporarily closed and motor stop auxiliary circuit M4 (1) -CRY is energized, and a
Contact CRI, a3 is closed and a contact CR is already closed.
6-a2 and the circuit M21 of the motor stop circuit N2.
relay CR7″ft is energized. This causes b contact C
R7-bl, CR7-b2. is opened circuit &2, #
3 is opened, the motor 5 is stopped, and the oil supply is stopped.

When relay CR2 is demagnetized, b contact CR2-bl is closed and timer TR6 of circuit M42 is activated. Already relay C
Since B contact CR6-b2 is opened by excitation of R6, the operating time T2 of timer T7?3 of circuit M42 is determined by resistor R3.
Determined by +7?1. When circuit M21 is closed, relay CR8 of circuit M22 is energized and a contact CR
After 8-ai is closed, the motor stop circuit N2 is held. Contact T after the fixed time T2 of timer 7'773
RZ, -al is closed relay CR12 of circuit M41
is temporarily de-energized, the a contact CR12-a2 is closed, and the circuit Jf23 (7) IJ is energized and the a contact CR9ai is held thereafter.

Also, b contact CR9-bl opens to demagnetize relay CR7 of circuit J21, and b contact CR7-bl, CR7-b
The timer TR1 of the circuit M2 is activated, and the relay CR2'fr of the circuit M3 is energized to close the a contacts CR2-a1 and rotate the motor 5 to supply oil. b contact CR2-bl
is opened and the circuit W42 is opened. Also relay C
Excitation of R9 closes the a contact CR9-a2 and opens the b contact CR9-b2. After a certain period of time set by timer TR1, temporarily close the a contact TR1-a1 and circuit M4
energizes relay C7?3, closes the a contact CR6-a4, and connects the already closed a contact CR9-&2 to the circuit M6.
1 relay CR10 is energized. For this reason, the a contact (?
7?10-al holds the circuit and b contact CR1 (
3-bl and CR1 (3-b2 are opened. Relay CR2 is demagnetized, motor 5 is stopped, and oil supply is stopped.

Also, the b contact CR2-bl of the circuit M42 is closed, the timer TR7 of the circuit M42 is activated, and the resistor R1+R2+R3
So the time 7゛6 can be determined. After a certain period of time T6 has passed, contact TR6-al is temporarily closed and relay C of circuit M41
R12 is temporarily excited. A contact CR12-a3
is already closed and the a contact CR5-a2. Since CR8-12 is closed, circuit Af7.2 relay CR11 is deenergized. b Contact CR11-bl is opened and relay C
R10 is demagnetized. b' contact CR10-'bi,
(?7? IQ + b2 is closed, timer TR1 of circuit M2 is energized, and relay CR2 of circuit M6 is energized. As a result, the a contact CR2-al is turned on by one second, and the motor 5 is rotated and oil is supplied. After a certain period of time of timer TR1, contact TR1-ai is temporarily closed and relay CR3 of circuit M4 is energized.
is closed, circuit JBI relay CR1° is energized, B contacts CR10-bl and CR10-b2 are similarly opened, relay CR2 of circuit M3 is demagnetized, motor 5 is stopped, and oil supply is stopped. One side contact CR2
-bl is closed, timer TR6 of circuit M42 is energized, and after a certain period of time T6, contacts TRy and -ai are temporarily closed, relay CR12 of circuit M41 is temporarily energized, a contacts CR12-a3 are closed, and relay CR11 is energized. circuit M7. ．． b contact CR11-bl of i is opened.

b contact cRH)-bl, CR10-b2 closes.

Thereafter, refueling is repeated in a cycle equal to the sum of the same motor drive time interval T6 and the demagnetization time of relay CR10. In this embodiment, the motor stop time interval was lengthened, but based on the same idea, it is also possible to keep the motor stop time constant and sequentially decrease the -times supply time. be.

Effects As detailed above, the present invention increases the amount of oil supplied at the beginning of operation and gradually decreases the amount of oil supplied to reach a steady state, so that there is no excess or shortage of oil throughout the entire operation, saving resources. It is extremely effective, and also has the feature that it can minimize the amount of mist that is undesirable from a sanitary standpoint, which greatly contributes to sanitary management.

[Brief explanation of the drawing]

FIG. 1 is a refueling system diagram. FIG. 2 is a control circuit diagram of a refueling motor. FIG. 6 is a timing diagram of relay and timer operation. FIG. 4 is a control circuit diagram of another embodiment. FIG. 5 is a timing diagram as well. 4...Pressure bomb 5...Motor 6...Distributor CR1~CR11...Relay TR1~TR5...
・Timer patent applicant: Okuma Iron Works Co., Ltd. 11, agent
Patent Attorney Yui Kato

Claims (1)

[Scope of Claims] (1) In the oil/air illumination type of high-speed rotating rolling bearings, the supply amount of lubricating oil is increased at the beginning of operation and gradually decreased to shift to a steady supply amount. A lubricating oil supply method characterized by: (2) The lubricating oil supply method according to claim 1, wherein the lubricating oil supply amount is decreased by gradually lengthening the supply interval. (8) Decrease in lubricating oil supply amount is JlliI
The scope of patent claims FIJi is characterized by decreasing as follows:
The method for supplying lubricating oil according to item 1. (4.) An air/oil distributor for supplying oil to the jet at the high-speed rolling bearing, a pump that sends pressure oil to the distributor, a motor that rotates the pump, and a drive interval of the motor. A lubricant oil equipped with a motor control circuit including a timer circuit that starts from the shortest time at the beginning of operation and gradually increases the length, and a repeat circuit that repeats the drive interval at the same interval after the drive interval reaches a predetermined interval.
(Feeding device.