JPH07115276B2 - Cutting fluid supply device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cutting fluid replenishing device for automatically replenishing cutting fluid to machine tools such as machining centers, lathes, and grinders.

[Conventional technology]

In the machine tool as described above, the cutting fluid decreases when machining the workpiece for a long time, so that it becomes necessary to supply the cutting fluid to the cutting fluid tank of the machine tool. In this case, conventionally, when a notification of the decrease of the cutting fluid is received, an operator manually drives the mixing apparatus, and the mixing apparatus mixes water and the stock solution for the cutting fluid to produce the cutting fluid. Is being replenished to the cutting fluid tank of the machine tool with reduced cutting fluid.

[Problems to be Solved by the Invention]

Since the above-mentioned conventional replenishment of cutting fluid requires manpower,
There is a problem in that the machine tool cannot be operated unattended for a long time, and when a large number of machine tools are operated for a long time, the burden on the operator becomes heavy.

This invention solves the above-mentioned problems, detects the decrease of the cutting fluid in the cutting fluid tank of the machine tool, and automatically drives the mixer to uniformly disperse the stock fluid for cutting fluid in the pressurized water. The cutting fluid is made up and can be replenished in the required amount without manpower, and the cutting fluid can be replenished to the cutting fluid tanks of several machine tools with one machine, which enables long-term unattended operation of the machine tool. It is an object of the present invention to provide an automatic replenishing device for cutting fluid that can be performed.

[Means for Solving the Problems]

A cutting fluid replenishing apparatus according to the present invention comprises a mixer having a jet pump and a swirl vane fixed in an inner cylinder of the pump in an outer box of the apparatus body, a stock solution tank containing a stock solution for cutting fluid, and the jet jet. A water side valve mechanism provided in a water pipe for supplying water pressurized from outside the device main body to the pump as a driving fluid, and a stock solution pipe supplying a stock solution for cutting fluid from the stock solution tank as a driven fluid to the jet pump A valve mechanism for the raw liquid side is provided, and a cutting liquid supply pipe connected to the discharge side of the jet pump is opened in the cutting liquid tank of the machine tool, and a decrease in the cutting liquid amount is detected in the cutting liquid tank and a control mechanism is used. A detection mechanism for opening the water side and undiluted solution side valve mechanisms is provided in the cutting fluid tank, and the water side and undiluted solution side valve mechanisms are closed by the control mechanism when replenishment of cutting fluid is completed. Than it is.

[Work]

In the cutting fluid replenishing device according to the present invention, when the cutting fluid in the cutting fluid tank is reduced to a predetermined amount or more, the detection mechanism detects it and sends a detection signal to the control mechanism. , Open the stock solution side valve mechanism, supply pressurized water as a driving fluid to the jet pump of the mixer, and send the stock solution for cutting fluid from the stock solution tank to the jet pump as a driven fluid, and the pressurized water and the stock solution for cutting fluid in this pump. By mixing and to make a cutting fluid, it can be replenished to the cutting fluid tank of the working mechanism from the cutting fluid replenishment pipe, and when the replenishment of the cutting fluid is completed, by closing the water side and the stock solution side valve mechanism by the control mechanism, The required amount of cutting fluid can be automatically replenished into the cutting fluid tank of the machine tool without requiring human hands, and the machine tool can be operated unattended for a long time. Further, it is possible to replenish the cutting fluid from a single replenishing device to several machine tools with a relatively simple structure. Furthermore, since the swirl vanes are provided in the inner cylinder of the jet pump,
When passing through this, the pressurized water becomes a swirl flow, and the stock solution for cutting fluid can be uniformly dispersed in this with a simple structure.

〔Example〕

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

In FIG. 1, reference numeral 1 is an apparatus main body, and a mixer 3 described later, a stock solution tank 4, a water pipe 6 having a water side valve mechanism 5, and a stock solution side valve are provided in an outer box 2 of the apparatus main body 1. A stock solution pipe 8 having a mechanism 7 and a control mechanism 9 are provided.

As shown in FIGS. 2 to 5, the mixer 3 has a jet pump 12 provided on an upper portion of a machine body 11. The jet pump 12 has a fitting hole 13 formed in the upper part of the machine body 11 so as to penetrate horizontally in the left-right direction of FIG.
The inner cylinder 14 in which 14b is tapered is loosely inserted, and the large diameter flange portion 14a provided at the base end portion of the inner cylinder 14 is fitted into the large diameter portion provided at the right end of the fitting hole 13 in FIG. The flange 14a is pressed against the step of the fitting hole 13 by the press fitting 15, and the press fitting 15 is fastened to the machine body 11 with the bolt 29, so that the inner cylinder 14
Is fixed in the machine body 11 concentrically with the fitting hole 13. Inner cylinder 14
The swivel plate 16 is fitted and fixed at a position near the tip of the swivel plate 16, and the swivel plate 16 has a proper number of inclined swirl vanes 16b such as eight.
Are radially projected from the central plate-shaped portion 16a. As shown in FIG. 2, the base end of the nozzle 17 is fitted and fixed to the left end of the machine body 11, and the nozzle 17 is formed with a tapered taper hole 17a coaxial with the fitting hole 13 and the inner cylinder 14. A base hole 17b having a taper formed in the opposite direction is formed at the base end of the tapered hole 17a. The tip portion 14b of the inner cylinder 14 is loosely inserted into the base hole 17b,
The ejection port 14d provided at the tip of the inner cylinder 14 is opened at the base end of the taper hole 17a, and the supply port 14c provided at the base end of the inner cylinder 14 is provided with the press fitting 1
It is connected to a supply source (not shown) of pressurized water through the hole 15a of 5 and the water pipe 6 (see FIG. 1).

A feed gap 18 for the stock solution for cutting fluid is formed between the outer peripheral surface of the inner cylinder 14 and the hole wall of the fitting hole 13, and the tip of this gap 18 is the inner cylinder.
It is opened in a gap 18a between the outer peripheral surface of the tip portion 14b of 14 and the hole wall of the base hole 17b of the nozzle 17. A feed passage 19 for the stock solution for cutting fluid, the tip of which communicates with the feed gap 18, is formed in the machine body 11. The feed passage 19 is, as shown in FIG. 2, perpendicular to a horizontal upstream passage 19a. A variable flow valve 20, which will be described later, is provided between the upstream flow passage 19a and the downstream portion 19b. The supply channel 19 is the base end opening 1 of the upstream channel 19a.
9c is located below the outer periphery of the inner cylinder 14 and is arranged in the lower part of the machine body 11, and the base end opening 19c is connected to the stock solution tank 4 (see FIG. 1) through the stock solution pipe 8.

The variable flow valve 20 is configured as follows. That is, the machine body 11 is provided with a valve body accommodating hole 21 that communicates with the upstream flow passage 19a and the downstream flow passage 19b of the supply flow passage 19 in an axial direction orthogonal to each other, and the accommodating hole 21 is a cone with a horizontal axial direction. It has a trapezoidal shape. A frustoconical valve element 22 is fitted into the accommodation hole 21 so as to be rotatable about its axis, and an operation shaft 23 is provided on the large-diameter end surface of the valve element 22 coaxially therewith. The operating shaft 23 is the accommodation hole 21.
It is inserted through a hole lid 25 that is fixed to the machine body 11 with screws 24, and the tip portion protrudes outside the machine body 11.
Are fitted and fixed. A spring 27 is interposed between the hole cover 25 and the large-diameter end surface of the valve body 22, and the valve body 22 is accommodated by the spring 27 biasing the valve body 22 in the direction opposite to the operation shaft 23. It is supported by the hole wall of the hole 21. On the outer peripheral surface of the valve body 22, there is formed a communication hole 28 located at the central portion in the axial direction and connecting the upstream side flow passage 19a and the downstream side flow passage 19b. The communication hole 28 is formed at an angle slightly smaller than 180 ° in the axial direction of the outer peripheral surface of the valve body 22, and has a constant groove width so that the groove bottom 28a becomes a smooth curve that deepens from one end to the other end. The cross-sectional area is changed in the circumferential direction in proportion to the rotation angle of the valve body 22 by cutting into.

As shown in FIG. 1, the water side valve mechanism 5 is composed of first and second electromagnetic valves 31 and 32 provided in series with the water pipe 6, and the stock solution side valve mechanism 7 is connected to the stock solution pipe 8. It is composed of a check valve 33 on the side of the stock solution tank 4 and a third solenoid valve 34 on the side of the mixer 3.

The tip of the nozzle 17 of the mixer 3 has a tapered hole.
The base end portion of the cutting fluid replenishing pipe 35 connected to 17a is fitted and fixed, and the replenishing pipe 35 is connected to the first, second, and third replenishing branch pipes 36, 3
7, 38 are branched, and cutting fluid supply valves 39, 40, which are three-way solenoid valves, are provided at the branched portions. The supply branch pipes 36, 37, 38
Are opened to the first, second and third cutting fluid tanks 41, 42 and 43 respectively attached to the three machine tools (not shown).
Each of these cutting fluid tanks 41, 42, 43 has a detection mechanism 4
4, 45, 46 are provided, and the detection mechanisms 44, 45, 46 each include a level sensor 47 and a float switch 48.

The control mechanism 9 includes the level sensors of the detection mechanisms 44, 45, 46.
A control circuit 49 which receives a detection signal from the 47 and the float switch 48, and a timer 50 which operates according to a command from the circuit 49 and operates the first and third solenoid valves 31 and 34 for a set time are provided. The second solenoid valve 32 and the replenishment valves 39 and 40 are operated in response to the above command.

Further, an indicator 53 is provided above the outer box 2, and the indicator 53
Is provided with red and blue lamps 54 and 55 and a buzzer 56, and the stock solution tank 4 is provided with a level sensor 57. The knob 26 of the variable flow valve 20 provided in the mixer 3 has an indicator
51 is projectingly provided, and a scale plate 52 is provided on the surface of the outer box 2.

In the cutting fluid replenishing device according to the embodiment configured as described above, when the cutting fluid in the cutting fluid tanks 41, 42, 43 is above a predetermined level, the first, third solenoid valves 31, 34 and the replenishment valve 39 are provided. , 40 are closed and only the second solenoid valve 32 is open. In this state, the jet pump 12 of the mixer 3 is not driven.

When the cutting fluid in the first cutting fluid tank 41 decreases and the level of the cutting fluid drops below a predetermined position, the level sensor 47 provided in the first cutting fluid tank 41 detects the decrease of the cutting fluid and outputs a detection signal to the control circuit. 49, and in response to a command from the control circuit 49, the first and third solenoid valves 31 and 34 are opened for the time set in the timer 50, and the replenishment valve 39 operates to operate only the first replenishment branch pipe 36. Communicate with the cutting fluid supply pipe 35.

For this reason, the water, which is the driving fluid pressurized to a predetermined pressure, passes through the hole 15a of the retainer fitting 15 and the water pipe 6 and the supply port 14c of the inner cylinder 14.
Is supplied from inside to the inner cylinder 14. The supplied water is squeezed by the tip portion 14b of the inner cylinder 14 and jetted out to the base end portion of the tapered hole 17a of the nozzle 17, so that the gap 18a, the feed gap 18, and the feed passage 19 become negative pressure. For this reason, when the valve body 22 of the variable flow valve 20 is opened to a required opening degree, the water-soluble cutting that becomes the driven fluid from the inner tube of the stock solution tank 4 through the stock solution pipe 8 and the base end opening 19c of the supply flow path 19. The undiluted solution for liquid is sucked into the taper hole 17a base end portion of the nozzle 17 through the upstream flow passage 19a of the supply flow passage 19, the communication groove 28 of the valve body 22, the downstream flow passage 19b, the supply gap 18 and the gap 18a. It is supplied to this base end. The stock solution for cutting fluid supplied is water and taper holes.
The cutting fluid that is mixed in 17a and is a mixture of both is the nozzle 1
It is sent to the supply pipe 35 from the tip of 7.

In this case, when the knob 26 is rotated from the outside of the machine body 11, the variable flow valve 20 rotates about the axis of the valve body 22 via the operation shaft 23 and communicates in proportion to the rotation angle of the valve body 22. The cross-sectional area of the portion that connects the upstream flow passage 19a and the downstream flow passage 19b of the supply flow passage 19 due to the groove 28 changes, and the flow rate of the other liquid that flows through the communication groove 28 to the downstream flow passage 19b changes. To do. That is, when the variable flow valve 20 is fully closed as shown in FIGS. 2 and 6 (a), the upstream end of the downstream flow passage 19b is blocked by the portion where the communication groove 28 of the valve body 22 is not formed. Therefore, the other liquid does not flow from the upstream channel 19a to the downstream channel 19b. Then, when the knob 26 is manually rotated, the valve body 22 is rotated via the operation shaft 23, and the valve body 22 moves from FIG. 6 (a) to FIG. 6 (b), (c), (d). ) And (e), each of which is rotated by 45 ° in the counterclockwise direction, the portion in which the cross-sectional area of the communication groove 28 sequentially increases in proportion to the rotation angle communicates with the upstream end of the downstream flow passage 19b. Therefore, the other liquid flowing from the upstream flow path 19a through the communication groove 28 to the downstream flow path 19b has a cross-sectional area of the communication groove 28 in the communication part between the communication groove 28 and the upstream end of the downstream flow path 19b. Accordingly, the flow rate of the other liquid is increased in proportion to the rotation angle of the valve body 22 until the state changes from FIG. 6 (b) to (e). Therefore, by rotating the valve body 22 by a required angle from the fully closed state of FIG. 6 (a), the required amount of stock solution for cutting fluid can be flowed from the upstream side channel 19a to the downstream side channel 19b. .

By providing the indicator portion 51 on the knob 26 of the variable flow valve 20 and using the scale plate 52 provided on the outer box 2 on the apparatus main body 1 side, the stock solution for cutting fluid according to the rotation angle of the operation shaft 23 can be prepared. Since the flow rate can be obtained, the valve body can be adjusted by the indicator 51 and the scale of the scale plate 52.
The rotation angle of 22 and the flow rate of the stock solution for cutting fluid can be visually confirmed outside the apparatus main body 1.

Further, the water as the driving fluid passes between the inclined swirl blades 16b of the swirl plate 16 fitted and fixed in the inner cylinder 14 to form a swirl flow from the tip of the inner cylinder 14 narrowed to a small diameter. Since it is ejected into the base end portion of the taper hole 17a of the nozzle 17, the stock solution for cutting fluid can be wound into the water from the outer peripheral side and uniformly dispersed and mixed.

When the cross section of the downstream flow path 19b of the supply flow path 19 is a rectangle such as a square or a rectangle, the flow path of the liquid flowing into the downstream flow path can be controlled particularly accurately.

Then, the cutting fluid in which water and the undiluted solution for cutting fluid are mixed flows from the replenishment pipe 35 through the first replenishment branch pipe 36 to the first cutting fluid tank.
Replenished to 41. During this state, the blue lamp 55 on the display 53
Is blinking. When the supply of cutting fluid is completed and the set time has elapsed, the timer 50 closes the first and third solenoid valves 31 and 34, and the supply of pressurized water that is the driving fluid is stopped.
The driving of the jet pump 12 is also stopped. At this time, blue lamp
55 turns on. When the timer 50 and the first solenoid valve 31 stop operating due to a failure, the level of the cutting fluid in the first cutting fluid tank 41 rises above the reference position, which is set by the float switch 48 provided in the first cutting fluid tank 41. Detect and control circuit 49
By closing the second solenoid valve 32 in accordance with the command of 1., the pressurized water does not flow into the jet pump 12, it stops, the supply of cutting fluid also stops, the supply valve 39 also closes, and the first
The level of the cutting fluid in the cutting fluid tank 41 is prevented from rising above the reference position and overflowing from the first cutting fluid tank 41. In this state, in response to a command from the control circuit 9, the red lamp of the display 53 is turned on and the buzzer 56 is activated to give an alarm.

The second solenoid valve 32 automatically closes in the event of a power failure and shuts off the water supply source to prevent supply.

Further, when the cutting fluid in the second cutting fluid tank 42 decreases and the level of the cutting fluid falls below a predetermined position, the level sensor 47 of the second cutting fluid tank 42 detects this and the detection signal is a control circuit. 9 and supply valve 39,40 by command from control circuit 9
Is activated and only the second replenishment branch pipe 37 is connected to the replenishment pipe 35.
When the cutting fluid in the third cutting fluid tank 43 decreases and the level of the cutting fluid falls below a predetermined position, the level sensor 47 of the third cutting fluid tank 42 detects this and the control circuit 9 The third supply branch pipe 38 is activated by operating the supply valves 39 and 40.
By connecting only the cutting fluid to the replenishment pipe 35, the cutting fluid can be replenished to the second and third cutting fluid tanks 42 and 43 in the same manner as the replenishment of the cutting fluid to the first cutting fluid tank 41 described above. it can.

If the cutting fluid in another cutting fluid tank decreases while the cutting fluid is being replenished to a certain cutting fluid tank, after the cutting fluid has been replenished to this cutting fluid tank, then to another cutting fluid tank. The cutting fluid should be replenished, and the level sensor should be used with a margin for this waiting time.

When the stock solution for cutting fluid in the stock solution tank 4 decreases and the level of the stock solution falls below a predetermined position, the level sensor 57 provided in the stock solution tank 4 detects this and sends this detection signal to the control circuit 9. , Display by command from control circuit 9
The red lamp 54 of 53 is turned on and the buzzer 56 gives an alarm. Therefore, in this case, the worker replenishes the stock solution 4 with the stock solution for the cutting solution by an appropriate means, and when the supply is completed, the red lamp 54 is turned off and the alarm of the buzzer 46 is stopped.

FIG. 7 shows another embodiment of the present invention. This example is 1
When the cutting fluid is replenished by one replenishing device to one cutting fluid tank 41, the replenishment pipe 37 is cut from the jet side of the jet pump of the mixer 3 without providing a replenishment branch pipe or a replenishment valve. The procedure is the same as that of the embodiment shown in FIGS. 1 to 5 described above except that the cutting fluid in which water and the stock solution for cutting fluid are mixed is supplied to the liquid tank 4. The same reference numerals as those in FIG. 1 in FIG. 7 indicate corresponding parts. In both of the embodiments described above, when the valve body 22 of the variable flow valve 20 provided in the mixer 3 is rotated from outside the apparatus main body 1, the valve body 22 of the supply passage 19 is proportional to the rotation angle of the valve body 22. Since the cross-sectional area of the communication groove 28 in the portion where the downstream side and the communication groove 28 of the valve body 22 communicate with each other continuously changes, by rotating the valve body 22 by a required angle, the supply amount of the cutting fluid stock solution Can be controlled with high precision, and the mixing ratio of water and the stock solution can be set to a required value (0 to 30% range).

Further, the water, which is the driving fluid, becomes a swirling flow by passing between the inclined swirl vanes 16b of the swirl plate 16 fitted and fixed in the inner cylinder 14 to form a swirl flow from the tip of the inner cylinder 14 to the base of the nozzle 17. With a simple structure, it is possible to squirt the inside of the shavings into the jetting water and to evenly disperse the cutting fluid from the outer peripheral side.

Further, the supply of the cutting fluid is started by the detection of the level sensor 47 provided in the detection mechanism 44, 45, 46 so that the supply of the cutting fluid is performed for the set time of the timer 50, and the cutting is performed by the failure of the timer 50 or the first electromagnetic valve 31. When the liquid rises above the reference position in the cutting liquid tank, this is detected by the float switch 48 provided in the detection mechanism 44, 45, 46, and the second solenoid valve 32 is closed to stop the supply of the pressurized water. It is possible to reliably prevent the cutting fluid level in the cutting fluid tank from abnormally rising and causing the cutting fluid to overflow outside the cutting fluid tank and polluting the tank surroundings.

〔The invention's effect〕

As described above, the cutting fluid replenishing apparatus according to the present invention contains the jet pump, the mixer having the swirl vanes fixed in the inner cylinder of the pump, and the stock solution for cutting fluid in the outer box of the apparatus body. A stock solution tank, a water side valve mechanism provided in a water pipe for supplying water pressurized from outside the apparatus main body as a driving fluid to the jet pump, and a stock solution for cutting fluid from the stock solution tank as a driven fluid to the jet pump. A valve mechanism is installed on the supply pipe for the supply of raw liquid, and a pipe for supplying the cutting liquid connected to the discharge side of the jet pump is opened in the cutting liquid tank of the machine tool to reduce the amount of cutting liquid in the cutting liquid tank. A detection mechanism for detecting and opening the water side and stock solution side valve mechanism via a control mechanism is provided in the cutting fluid tank, and the water side and stock solution side valve machine is controlled by the control mechanism when the supply of the cutting fluid is completed. So it was to close as, the following effects can be obtained.

That is, the cutting fluid replenishing device according to the present invention, when the cutting fluid in the cutting fluid tank is reduced to a predetermined amount or more, the detection mechanism detects this, sends a detection signal to the control mechanism, by the command of the control mechanism, Open the water side and stock solution side valve mechanisms to supply pressurized water as a driving fluid to the jet pump of the mixer,
The stock solution for cutting fluid is sent from the stock solution tank to the jet pump as a driven fluid, and the pressurized water and the stock solution for cutting fluid are mixed in this pump to create a cutting fluid, which is supplied from the cutting fluid supply pipe to the cutting fluid of the machine tool. The tank can be replenished, and when the replenishment of the cutting fluid is completed, the control mechanism closes the water side and stock solution side valve mechanisms, so that the required amount of cutting fluid can be automatically stored in the cutting fluid tank of the machine tool without requiring human labor. The machine tool can be operated unmanned for a long time. Further, it is possible to replenish the cutting fluid from a single replenishing device to several machine tools with a relatively simple structure. Further, since the swirl vanes are provided in the inner cylinder of the jet pump, the pressurized water becomes a swirl flow when passing through the swirl vane, and the stock solution for cutting fluid can be uniformly dispersed in the swirl flow.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a cutting fluid replenishing device according to an embodiment of the present invention, and FIG. 2 is a fourth embodiment showing a mixer of the same embodiment.
Fig. 3 is a sectional view taken along the line A-A in Fig. 3, Fig. 3 is a sectional view taken along the line BB in Fig. 5, and Figs.
FIGS. 7A to 7E are cross-sectional views respectively showing a valve body and a valve body peripheral portion in which the valve body of the variable flow valve is rotated in the same direction at different angles, and FIG. It is a schematic block diagram which shows the cutting fluid replenishment apparatus by an Example. 1 ... Device body, 2 ... Outer box, 3 ... Mixer, 4 ... Stock solution tank, 5 ... Water side valve mechanism, 6 ... Water piping, 7 ... Stock solution side valve mechanism, 8 ... Stock solution Piping, 9 ... Control mechanism, 11 ...
Mixer, 12 …… jet pump, 14 …… inner cylinder, 16 ……
Swivel plate, 16b ... Swirl vane, 17 ... Nozzle, 18 ... Supply gap, 19 ... Supply flow passage, 20 ... Variable flow valve, 22 ... Valve element, 23 ... Operation axis, 28 ... Communication Groove, 35 …… Cutting fluid supply pipe, 36,37,38 …… Supply branch pipe, 39,40 …… Cutting fluid supply valve, 41,42,43 …… Cutting fluid tank, 44,45,46 …… Detection mechanism.

Claims (2)

[Claims] 1. A mixer having a jet pump and a swirl vane fixed in the inner cylinder of the pump in an outer box of the apparatus main body, a stock solution tank containing a stock solution for cutting fluid, and a drive fluid for the jet pump. A water side valve mechanism provided in a water pipe for supplying water pressurized from outside the apparatus main body, and a stock solution side valve mechanism provided in a stock solution pipe for supplying a stock solution for cutting fluid from the stock solution tank as a driven fluid to the jet pump. And the cutting fluid supply pipe connected to the discharge side of the jet pump is opened in the cutting fluid tank of the machine tool, the decrease in the cutting fluid amount is detected in the cutting fluid tank, and the water side is detected through the control mechanism. The cutting fluid is provided with a detection mechanism for opening the undiluted fluid side valve mechanism, and the control mechanism closes the water side and undiluted fluid side valve mechanisms when the cutting fluid replenishment is completed. Supply device. 2. A cutting fluid replenishing pipe is opened to a cutting fluid tank of a plurality of machine tools through a plurality of replenishment branch pipes provided with a cutting fluid replenishment valve, and the cutting fluid replenishing tank is opened in each cutting fluid tank. A detection mechanism to detect the decrease in the amount of cutting fluid is detected, and the decrease in the amount of cutting fluid is detected by the detection mechanism. The cutting fluid replenishing device according to claim 1, wherein the water side and stock solution side valve mechanisms are opened together with the opening.