JP2018024080A - Contamination evaluation device of coolant liquid of machine tool system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coolant pollution evaluation device of a machine tool system capable of providing a sensor in a tank main body and evaluating the pollution degree of the coolant liquid. SOLUTION: A pollution evaluation device 100 for a coolant liquid C used in a machine tool 1 is a pollution evaluation device 100 provided in a tank body 80 for storing the coolant liquid C used in the machine tool 1, and is in the liquid of the coolant liquid C. A reflective member 110 that can be immersed in the tank body 80, a light emitting element 124 that is provided in the tank body 80 and emits light toward the reflective member 110, and a first light receiving element 125 and a second light receiving element that receive the reflected light from the reflective member 110. A sensor 120 having 126 and an evaluation unit 130 for evaluating the degree of pollution of the coolant liquid C based on the amount of light received by the light receiving element are provided. [Selection diagram] Fig. 2

Description

  The present invention relates to a coolant evaluation apparatus for coolant in a machine tool system.

  The coolant liquid of the machine tool is supplied to the processing area, is then collected in the tank, and is supplied again to the processing area. Since the coolant liquid that circulates between the processing region and the tank is contaminated by containing chips or dust, it is generally performed to purify the coolant liquid by installing a filter in the circulation path. However, since the coolant cannot be completely purified by the filter, it is necessary to periodically replace the contaminated coolant.

  In this regard, Patent Document 1 discloses a technique for managing the contamination degree of the coolant liquid by using an optical sensor or a pressure sensor provided in a pipe line that circulates from the processing region to the tank, and determining the replacement timing of the coolant liquid. Yes.

JP 2001-219338 A

  However, it is not easy to provide the optical sensor and the pressure sensor other than the circulation line from the processing region to the tank.

  An object of the present invention is to provide a coolant evaluation apparatus for a coolant of a machine tool system in which a sensor can be provided in a tank body and the pollution of the coolant can be evaluated.

  A coolant evaluation device for a coolant of a machine tool system according to the present invention is provided in a tank body that stores coolant liquid used in a machine tool system, a reflective member that can be immersed in the coolant liquid, and the tank body. A sensor including a light emitting element that emits light toward the reflecting member, a light receiving element that receives reflected light from the reflecting member, and an evaluation for evaluating the degree of contamination of the coolant based on the amount of light received by the light receiving element A section.

  According to the present invention, the light emitting element emits light toward the reflecting member that can be immersed in the coolant liquid stored in the tank body, and the light receiving element receives the reflected light. Since the pollution degree of the coolant is evaluated based on the amount of light received by the light receiving element, the pollution evaluation device can grasp the appropriate replacement time of the coolant based on the evaluation. Further, since the sensor is provided in the tank body, the degree of freedom in designing the machine tool system can be increased.

It is a top view of the machine tool in a first embodiment of the present invention. It is the side view of the coolant supply apparatus which looked at the tank main body in cross section. It is sectional drawing of the detection part arrange | positioned facing the reflection member through the transparent window. It is a side view of the coolant supply apparatus which carried out the cross sectional view of the tank main body in 2nd embodiment, and shows the state which has arrange | positioned the reflection member taken out from the liquid of coolant liquid facing the sensor.

<1. First embodiment>
Hereinafter, an embodiment to which a coolant evaluation device for a coolant of a machine tool system according to the present invention is applied will be described with reference to the drawings. First, with reference to FIG. 1, the outline of the machine tool 1 using the contamination evaluation apparatus 100 of the coolant C in 1st embodiment of this invention is demonstrated.

(1-1. Schematic configuration of machine tool 1)
As shown in FIG. 1, the machine tool 1 is a table traverse type grinding machine that performs grinding while rotating a cylindrical workpiece W. A machine tool 1 as a machine tool system includes a bed 2, a table 10, a headstock 20, a tailstock 30, a grinding wheel base 40, a grinding wheel 50, a sizing device 60, and a coolant supply device 70. .

  The bed 2 is a part that becomes a base of the machine tool 1. The bed 2 is provided with an operation panel 3 into which various parameters relating to grinding conditions and the like are input. The table 10 is provided on the bed 2 so as to be movable in the Z-axis direction. The table 10 reciprocates in the Z-axis direction by driving a screw feeder 12 having a Z-axis motor 11.

  The headstock 20 is fixed on the table 10. The headstock 20 includes a main shaft 21 that rotates around an axis parallel to the Z-axis direction, and a main shaft motor 22 that applies a driving force for rotating the main shaft 21. The headstock 20 rotatably supports one end of the workpiece W by the spindle 21 and rotationally drives the workpiece W by the spindle motor 22. The tailstock 30 is provided on the table 10 at a position facing the headstock 20 and supports the other end of the workpiece W.

  The grinding wheel base 40 is provided on the bed 2 so as to be movable in the X-axis direction. The grindstone table 40 reciprocates in the X-axis direction by driving a screw feed mechanism 42 having an X-axis motor 41. The grinding wheel 50 is supported by the grinding wheel base 40 so as to be rotatable about an axis parallel to the Z-axis direction. The grinding wheel 50 rotates when a driving force is applied from a grinding wheel motor 51 fixed to the grinding wheel base 40 and grinds the outer peripheral surface of the workpiece W.

  The sizing device 60 is provided so as to be in contact with the workpiece W on the opposite side of the grinding wheel 50 across the table 10. The sizing device 60 measures the outer diameter of the workpiece W ground by the grinding wheel 50. The coolant supply device 70 is provided at a position away from the bed 2 and supplies the coolant liquid C from a coolant nozzle (not shown) toward the grinding site.

(1-2. Configuration of Coolant Supply Device 70)
As shown in FIG. 2, the coolant supply device 70 includes a tank body 80 and a pollution evaluation device 100. The tank body 80 is a container for storing the coolant liquid C. The coolant C stored in the tank body 80 is collected and returned to the tank body 80 after being supplied to the grinding site.

  A transparent window 81 that forms a storage area for the coolant C in the tank body 80 is provided on the outer surface of the tank body 80. The liquid level of the coolant C stored in the tank body 80 is located above the position where the transparent window 81 is disposed, and the degree of contamination of the coolant C is from outside the tank body 80 via the transparent window 81. Can be confirmed.

  The pollution evaluation device 100 is a device for determining the replacement time of the coolant C stored in the tank body 80. The pollution evaluation apparatus 100 includes a reflecting member 110, a sensor 120, and an evaluation unit 130.

The reflective member 110 is disposed at a position facing the transparent window 81 inside the tank main body 80, and a space through which the coolant C stored in the tank main body 80 can flow between the transparent window 81 and the reflective member 110. Is formed.

  The sensor 120 includes a holding unit 121 and a detection unit 122. The holding unit 121 is fixed to the outer surface of the tank body 80 and holds the detection unit 122. The detection unit 122 is disposed at a position facing the reflection member 110 with the transparent window 81 interposed therebetween.

  Here, the detection unit 122 will be described with reference to FIG. As shown in FIG. 3, the detection unit 122 includes a substrate 123, a light emitting element 124, a first light receiving element 125 and a second light receiving element 126, a lid 127, and three lenses 128a to 128c.

  The substrate 123 is made of a semiconductor material (N-type, P-type, bipolar type, etc.) and is mounted on one surface of the holding portion 121 (the surface facing downward in FIG. 3). The light emitting element 124 is a light emitting diode mounted on the substrate 123, and emits light toward the normal direction (downward in FIG. 3) of one surface of the holding unit 121. The first light receiving element 125 and the second light receiving element 126 are photodiodes mounted on the substrate 123 and are disposed in the vicinity of the light emitting element 124. The light emitting element 124, the first light receiving element 125, and the second light receiving element 126 are arranged in a straight line along the longitudinal direction (left and right direction in FIG. 2) of the holding portion 121. The light emitting element 124 includes the first light receiving element 125 and the first light receiving element 125. It arrange | positions between the 2nd light receiving elements 126. FIG. The light emitting element 124, the first light receiving element 125, and the second light receiving element 126 arranged on the substrate 123 are partitioned by a partition plate 129. Therefore, the detection unit 122 can efficiently perform light emission from the light emitting element 124 and light reception to the first light receiving element 125 and the second light receiving element 126.

  In this embodiment, the case where a light emitting diode is used as the light emitting element 124 has been described as an example. However, instead of the light emitting diode, electroluminescence, a laser element, or the like may be used as the light emitting element 124. In this embodiment, the case where photodiodes are used as the first light receiving element 125 and the second light receiving element 126 has been described as an example. However, instead of the photodiode, a CCD, a CMOS element, or the like is used as the first light receiving element 125. The second light receiving element 126 may be used.

  The lid 127 covers the substrate 123, the light emitting element 124, the first light receiving element 125, and the second light receiving element 126. The lid 127 holds one lens 128 a to 128 c at positions facing the light emitting element 124, the first light receiving element 125, and the second light receiving element 126, respectively. The three lenses 128a to 128c may be aspherical lenses. For easy detection, the lens shape may be changed to adjust the focal position and the focal depth of the lens.

  Of the three lenses 128 a to 128 c, the light emitted from the light emitting element 124 is incident on the lens 128 a disposed at a position facing the light emitting element 124. The lens 128a bends the light emitted from the light emitting element 124 and guides the bent light to a specific position P.

  Among the three lenses 128a to 128c, the lenses 128b and 128c disposed at positions facing the first light receiving element 125 and the second light receiving element 126 bend the light incident from a specific position P and bend the light. The light is guided to the first light receiving element 125 or the second light receiving element 126.

  Here, when light is emitted from the light emitting element 124 toward the reflecting member 110 existing in the coolant liquid C, the more floating matter S such as chips and dust contained in the coolant liquid C, The light is scattered, and the amount of light detected by the first light receiving element 125 and the second light receiving element 126 is reduced. The evaluation unit 130 evaluates the degree of contamination of the coolant liquid C based on the amount of reflected light from the reflecting member 110 and reflected light from the coolant liquid C received by the first light receiving element 125 and the second light receiving element 126.

  For example, the evaluation unit 130 determines whether the light amounts received by the first light receiving element 125 and the second light receiving element 126 are smaller than a predetermined light amount, and the first light receiving element 125 and the second light receiving element 126. When the amount of light received by is smaller than a predetermined amount of light, it is determined that it is time to replace the coolant C. In this case, when the machine tool 1 is provided with a notification device such as a lamp or a buzzer on the sensor 120 and the evaluation unit 130 determines that it is time to replace the coolant C, the notification device notifies the operator of that fact. May be.

  Thus, the pollution evaluation apparatus 100 senses and evaluates the degree of contamination of the coolant C by the sensor 120. The operator can grasp an appropriate replacement time of the coolant based on the evaluation by the pollution evaluation apparatus 100. Moreover, since the sensor 120 is provided in the tank main body 80, the design freedom of the machine tool 1 can be increased.

  In the present embodiment, the machine tool system is composed of one machine tool 1, but the present invention is not limited to this. For example, a machine tool system includes a plurality of machine tools and an analysis device provided on a network that is external to the plurality of machine tools and connected to the plurality of machine tools. The evaluation unit 130 provided in the apparatus 100 may be provided in the analysis apparatus. In this case, the analysis apparatus, for example, the specific machining conditions (specific workpiece W, specific machine tool 1, specific environment (air temperature, temperature, etc.), the degree of contamination of the coolant C in a specific processing state, or the like. Accumulate data about. Then, the analysis device analyzes the accumulated data, and the evaluation unit 130 predicts the replacement timing of the coolant C and determines appropriate processing conditions based on the analysis results (trends, abnormalities, etc.) by the analysis device. I do. Thereby, the machine tool system can replace the coolant C at an appropriate time.

<2. Second embodiment>
Next, a second embodiment will be described with reference to FIG. In the first embodiment, the light emitting element 124 emits light toward the reflecting member 110 immersed in the coolant liquid C, and the first light receiving element 125 and the second light receiving element 126 are reflected by the reflecting member 110 and the coolant. The case where the reflected light from the liquid C is received has been described. On the other hand, in the second embodiment, the light emitting element 124 emits light to the reflecting member 310 taken out from the coolant liquid C, and the first light receiving element 125 and the second light receiving element 126 are reflected by the reflecting member 310 and the reflective member. The reflected light from the suspended matter S attached to the member 310 is received. The machine tool 201 as the machine tool system in the second embodiment has the same configuration as that of the machine tool 1 in the first embodiment, except for the pollution evaluation device 300 in the coolant supply device 270. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

(2-1. Configuration of pollution evaluation apparatus 300)
As shown in FIG. 4, the pollution evaluation device 300 includes a reflective member 310, a sensor 320, and an evaluation unit 130. The reflection member 310 is provided so as to be movable between the coolant liquid C and the outside of the liquid coolant C with respect to the tank body 80, and is formed so that the suspended matter S in the liquid can adhere to the tank body 80 when it is taken out of the liquid. The

  The sensor 320 includes a holding unit 321 and a detection unit 122. The holding unit 321 is fixed to the outer surface of the tank body 80 and holds the detection unit 122. The detection unit 122 is arranged above the storage area for the coolant C in the tank body 80. The sensor 120 emits light toward the reflecting member 310 taken out from the coolant liquid C, and receives the reflected light from the reflecting member 310 and the floating substance S attached to the reflecting member 310.

  The evaluation unit 130 evaluates the degree of contamination of the coolant C based on the amount of reflected light from the reflecting member 310 and the reflected light from the suspended matter S received by the first light receiving element 125 and the second light receiving element 126. In this case, since the pollution evaluation apparatus 300 performs sensing by the sensor 120 with respect to the reflecting member 110 taken out of the coolant liquid C and evaluates the pollution degree of the coolant liquid C, the coolant liquid is colored. Even so, the turbidity of the coolant C can be accurately evaluated.

<3. Other>
Although the present invention has been described based on the above embodiments, the present invention is not limited to the above embodiments, and various modifications and improvements can be made without departing from the spirit of the present invention. It can be easily guessed.

<4. Effect>
As described above, the pollution evaluation apparatuses 100 and 300 to which the present invention is applied are the pollution evaluation apparatuses 100 and 300 provided in the tank body 80 that stores the coolant liquid C used in the machine tools 1 and 201 as the machine tool system. The reflective members 110 and 310 that can be immersed in the coolant liquid C, the light emitting element 124 that is provided in the tank body 80 and emits light toward the reflective members 110 and 310, and the reflective members 110 and 310. Sensors 120 and 320 having a first light receiving element 125 and a second light receiving element 126 as light receiving elements for receiving reflected light, an evaluation unit 130 for evaluating the degree of contamination of the coolant C based on the amount of light received by the light receiving elements, Is provided.

  According to the coolant evaluation apparatus 100, 300 for the coolant C of the machine tools 1, 201 as the machine tool system, the light emitting element 124 is a reflective member that can be immersed in the coolant C stored in the tank body 80. The first light receiving element 125 and the second light receiving element 126 as the light receiving elements receive the reflected light. Since the pollution degree of the coolant liquid C is evaluated based on the amount of light received by the light receiving element, the pollution evaluation apparatuses 100 and 300 can grasp the appropriate replacement time of the coolant liquid C based on the evaluation. Moreover, since the sensors 120 and 320 are provided in the tank main body 80, the design freedom of the machine tool system can be increased.

  In the contamination evaluation apparatus 100 for the coolant liquid C of the machine tool 1 as the machine tool system described above, the light emitting element 124 emits light toward the reflecting member 110 existing in the coolant liquid C, and serves as the first light receiving element. The light receiving element 125 and the second light receiving element 126 receive the reflected light from the reflecting member 110 and the reflected light from the coolant liquid C.

  Since the contamination evaluation apparatus 100 for the coolant C of the machine tool 1 as the machine tool system can accurately evaluate the contamination of the coolant C stored in the tank body 80, the coolant C at an appropriate time. Can be exchanged.

  In the contamination evaluation apparatus 100 for the coolant C of the machine tool 1 as the machine tool system described above, the tank body 80 includes a transparent window 81 that forms a storage area for the coolant C, and the reflection member 110 is provided on the tank body 80. It is provided in a position facing the transparent window 81 inside. The sensor 120 is provided on the outer surface of the transparent window 81 of the tank body 80, and the light emitting element 124 emits light toward the reflecting member 110 through the transparent window 81, and the first light receiving element 125 and the second light receiving element as the light receiving elements. The light receiving element 126 receives the reflected light through the transparent window 81.

  The contamination evaluation apparatus 100 for the coolant C of the machine tool 1 as the machine tool system accurately evaluates the contamination of the coolant C stored in the tank body 80 while increasing the design freedom of the machine tool system. Can do.

  In the contamination evaluation apparatus 300 for the coolant C of the machine tool 201 as the machine tool system described above, the reflection member 310 is provided so as to be movable between the coolant liquid C and the coolant liquid C. The suspended matter S in the coolant liquid C can be attached. The light emitting element 124 emits light toward the reflecting member 310 moved out of the coolant liquid C, and the first light receiving element 125 and the second light receiving element 126 as light receiving elements are moved out of the coolant liquid C. The reflected light from the reflecting member 310 and the reflected light from the suspended matter S attached to the reflecting member 310 are received.

  The contamination evaluation apparatus 300 for the coolant C of the machine tool 201 as the machine tool system evaluates the contamination of the coolant C by the reflecting member 310 moved out of the coolant C. Even if it is colored, the turbidity of the coolant C can be accurately evaluated.

  1, 201: Machine tool (machine tool system), 80: Tank body, 81: Transparent window, 100, 300: Pollution evaluation device, 110, 310: Reflecting member, 120, 320: Sensor, 123: Substrate, 124: Light emission Element: 125: First light receiving element (light receiving element), 126: Second light receiving element (light receiving element), 130: Evaluation section, C: Coolant liquid, S: Floating object, W: Workpiece

Claims (4)

A pollution evaluation apparatus provided in a tank body for storing a coolant liquid used in a machine tool system,
A reflective member that can be immersed in the coolant liquid;
A light-emitting element that is provided in the tank body and emits light toward the reflecting member; and a sensor having a light-receiving element that receives reflected light from the reflecting member;
An evaluation unit that determines contamination of the coolant based on the amount of light received by the light receiving element;
A coolant evaluation device for coolant in a machine tool system. The light emitting element emits light toward the reflecting member present in the coolant liquid.
2. The coolant evaluation device for coolant in a machine tool system according to claim 1, wherein the light receiving element receives reflected light from the reflecting member and reflected light from the coolant liquid. The tank body includes a transparent window that forms a storage area for the coolant.
The reflecting member is provided in a position facing the transparent window inside the tank body,
The sensor is provided on the outer surface of the transparent window of the tank body,
The light emitting element emits light toward the reflecting member through the transparent window,
The contamination evaluation apparatus for coolant of a machine tool system according to claim 2, wherein the light receiving element receives the reflected light through the transparent window. The reflecting member is provided so as to be movable between the coolant liquid and the outside of the coolant liquid, and is capable of adhering suspended matter in the coolant liquid.
The light emitting element emits light toward the reflecting member moved out of the coolant liquid,
The coolant of a machine tool system according to claim 1, wherein the light receiving element receives reflected light from the reflecting member moved out of the coolant liquid and reflected light from a suspended matter attached to the reflecting member. Liquid pollution evaluation device.

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