TWM594682U - Cooling device used in machine tool and capable of selective internal circulation - Google Patents

Abstract

A cooling device that can be used for machine tools and can selectively circulate internally. A cooling mechanism is mainly provided between the outlet channel and the inlet channel of the cooling liquid, such as a circulation channel or a four-way electronic valve to replace the circulation. Channel, and the electronic valve unit is controlled by the controller, and is switched to a pass-through state or a circulation state; wherein, when the electronic valve unit is switched to the pass-through state, the cooling fluid flowing out of the outlet channel does not pass through the circulation channel And flows to the liquid inlet channel; when the electronic valve unit is switched to the circulation state, the cooling liquid flowing out of the liquid outlet channel does not flow out of the cooling device, but only flows to the liquid inlet channel through the circulation channel .

Description

Cooling device used in machine tool and capable of selective internal circulation

This creation is related to the cooling technology of machine tools, especially a cooling device used in machine tools and capable of selective internal circulation.

The existing known techniques for cooling the machine tool mainly use a cooling device, a storage tank in the cooling device to contain the cooling liquid, and a storage tank with a cooling compressor to cool the storage tank to cool the storage tank , The cooled cooling fluid is driven by a motor to flow to the components on the machine tool, such as the machine tool spindle, hollow screw or motor housing to cool it. This cooling function is mainly to avoid components on the machine tool Damage caused by continuous heating during operation.

Because the components on the machine tool will change the volume or assembly relationship with the temperature change due to the effect of thermal expansion and contraction, it can be understood that the machining accuracy of the machine tool will also change with the temperature. Even if the optimal working state of the machine tool is set to correspond to a specific working temperature, the temperature of the tool mechanism component is lower than the specific work just after the machine tool is started in the cold state or due to the excessive cooling of the aforementioned cooling device The temperature will still affect the processing accuracy.

In addition, in actual operation, after the machine tool finishes processing the workpiece, the operator must suspend the operation of the machine tool to remove the processed workpiece and replace the workpiece to be processed on the machine tool before operating the machine tool For processing. When replacing the workpiece, the current technology does not stop the cooling compressor. This is because if the cooling compressor repeats the opening and closing operations within a short period of time, it is easy to cause damage, and the motor used to drive the cooling fluid is also Will not be closed to avoid too frequent opening and closing actions. Therefore, when replacing the workpiece to be processed, the cooling compressor and motor in the cooling device will not shut down and continue to cool the cooling liquid, and the components on the machine tool will continue to cool down quickly and quickly, far lower Due to the aforementioned specific working temperature, the problem of reduced processing accuracy is caused.

The Republic of China Announcement No. I593501 patent discloses a machine tool thermostat control system and a flow path switching valve, which are mainly used to adjust the temperature of a machine tool during operation, thereby improving the machining accuracy and quality of the machine tool. The main technical means to achieve the above function is to use its storage tank, pump, cooling device and flow path switching valve to provide the cooling effect. In terms of heating, a temperature sensor and a heating device are additionally provided. The heating device in this case is only used to prevent the coolant from excessively sticking or solidifying when it is too cold, and to maintain the fluidity of the coolant by heating. The cooling device in this case can only provide a cooling effect by outputting coolant to the machine tool, but it does not disclose how to avoid continuous cooling of the machine tool when replacing the workpiece. Therefore, this case will still have the aforementioned causes The problem of reduced processing accuracy.

The main purpose of this creation is to propose a cooling device for machine tools that can be selectively circulated. When the cooling effect needs to be temporarily stopped, the cooling liquid can be circulated in the cooling device to avoid continuous By cooling the components of the machine tool, the temperature of the tool mechanism components can be maintained, and the machining accuracy is further maintained.

In order to achieve the above purpose, the author proposes a cooling device for a machine tool that can be selectively circulated, including: a housing; a controller; a liquid storage tank, which is located in the housing and stores cooling liquid inside; A liquid inlet channel is provided in the casing and communicates with the liquid storage tank; a liquid outlet channel is provided in the casing and communicates with the liquid storage tank; a pump is electrically connected to the controller and the pump is connected The liquid outlet channel is controlled by the controller to drive the cooling liquid in the liquid outlet channel to move away from the liquid storage tank; and a cooling compressor is located in the housing and is electrically connected to the controller , The cooling compressor has a condenser tube extending through at least one of the liquid inlet channel, the liquid storage tank, or the liquid outlet channel; a circulation channel, one end of which is connected to the liquid inlet channel, and the connection position is at The liquid inlet channel is located after the pump in terms of the liquid outlet direction, and the other end of the circulation channel is connected to the liquid outlet channel; and an electronic valve unit in the liquid inlet channel, the circulation channel, and the liquid outlet Among the three channels, the electronic valve unit is at least provided in the liquid outlet channel and is electrically connected to the controller, and is switched to a pass-through state or a circulating state under the control of the controller; wherein, the electronic valve unit is switched When it is in the pass-through state, the cooling fluid flowing out of the outlet channel will not flow to the inlet channel through the circulation channel; when the electronic valve unit is switched to the circulation state, the cooling fluid flowing out of the outlet channel will not flow to The cooling device flows out, but only flows through the circulation channel to the liquid inlet channel.

With the above technical features, when it is necessary to temporarily stop the cooling effect, the cooling liquid can be selectively returned to the liquid storage tank from the circulation channel without flowing to the components of the machine tool, so as to avoid continuous By cooling, the temperature of the tool mechanism components can be maintained, and the accuracy of processing can be further maintained.

In order to explain the technical characteristics of this creation in detail, the following preferred embodiments are described below in conjunction with the schematic description, in which:

As shown in FIG. 1 to FIG. 2, a cooling device 10 for a machine tool with a selective internal circulation proposed by a preferred embodiment of the present invention is mainly composed of a casing 11, a controller 13, and a liquid storage tank 15. A liquid inlet channel 17, a liquid outlet channel 19, a pump 21, a cooling compressor 23, a circulation channel 25 and an electronic valve unit 27, in which:

The controller 13 may be installed in the casing 11 or a machine tool. In this embodiment, the casing 11 is taken as an example. The controller 13 is used to provide a control function, which may be a microcomputer or other device with a control function.

The liquid storage tank 15 is located in the housing 11 and stores coolant therein.

The liquid inlet channel 17 is provided in the casing 11 and communicates with the liquid storage tank 15.

The liquid outlet channel 19 is provided in the casing 11 and communicates with the liquid storage tank 15.

The pump 21 is electrically connected to the controller 13, and the pump 21 is connected to the liquid discharge channel 19, and is controlled by the controller 13 to drive the cooling liquid in the liquid discharge channel 19 to the liquid storage tank 15 directions. The pump 21 may be installed in the housing 11 or the liquid storage tank 15 as long as it can drive the cooling liquid to flow out from the liquid outlet channel 19.

The cooling compressor 23 is located in the casing 11 and is electrically connected to the controller 13. The cooling compressor 23 has a condenser tube 231 extending through the interior of the liquid storage tank 15. The condensing tube 231 may also be disposed in the liquid inlet channel 17 or the liquid outlet channel 19, and is not limited to being disposed inside the liquid storage tank 15, as long as it can provide a cooling effect to the cooling liquid.

One end of the circulation channel 25 is connected to the liquid inlet channel 17, and the position of this connection is located behind the pump 21 in the liquid inlet channel 17 in terms of the liquid discharge direction, and the other end of the circulation channel 25 is connected to the出液channel 19.

The electronic valve unit 27 has a three-way electronic valve 271, and the liquid outlet channel 19 and the circulation channel 25 are connected to the three-way electronic valve 271 to achieve a connection relationship. The electronic valve unit 27 is electrically connected to the controller 13 and is controlled by the controller 13 to switch to a pass-through state or a cycle state.

Wherein, when the three-way electronic valve 271 is switched to the pass-through state, the three-way electronic valve 271 is switched to the cooling liquid of the outlet channel 19 can flow out of the cooling device, but cannot flow into the circulation channel 25, so The cooling fluid flowing out of the liquid outlet channel 19 will not flow through the circulation channel 25 to the liquid inlet channel 17; when the three-way electronic valve 271 is switched to the circulating state, the three-way electronic valve 271 is switched to the liquid outlet The cooling liquid in the channel 19 cannot flow out of the cooling device, but can only enter the circulation channel 25 and flow to the liquid inlet channel 17.

The structure of the first embodiment has been described above, and the operation state of the first embodiment will be described next.

As shown in FIG. 3, the cooling device 10 used in the machine tool and capable of selective internal circulation is assembled on a machine tool before use, so that its liquid outlet channel 19 and liquid inlet channel 17 are The tube body 99 is connected to a tool mechanism component 91, such as a machine tool spindle, a servo motor, or a hollow screw, to provide cooling liquid for cooling.

As shown in FIG. 4, when the machine tool is processing, the controller 13 controls the electronic valve unit 27 to switch to the warp-through state. At this time, the cooling compressor 23 operates and the cooling pipe 231 is used to cool the cooling liquid in the liquid storage tank 15, and the pump 21 drives the cooling liquid to flow. The cooling fluid flowing out of the liquid outlet channel 19 enters the tool mechanism component 91 for cooling and cooling, and the cooling fluid flowing out of the tool mechanism component 91 returns to the liquid inlet channel 17 and finally enters the storage tank 15 . When the electronic valve unit 27 is in the passage-through state, it can be ensured that the cooling liquid flowing out of the liquid outlet channel 19 does not enter the circulation channel 25.

As shown in FIG. 5, when the machine tool needs to be suspended to replace the workpiece, the user can operate the controller 13 or the machine tool can actively inform the controller 13 of the current machine tool suspended state, and the controller 13 controls the The electronic valve unit 27 is switched to the circulating state. At this time, neither the cooling compressor 23 nor the pump 21 stops running, that is, it continues to operate, and the cooling liquid flowing out of the liquid outlet channel 19 cannot flow out, but can only enter the circulation channel 25, Then enter the liquid inlet channel 17, and finally return to the liquid storage tank 15. Wherein, since the tube body 99 between the tool mechanism part 91 and the cooling device is filled with cooling liquid, the cooling liquid that enters the liquid inlet channel 17 from the circulation channel 25 can no longer flow to the tool mechanism part 91 , Can only flow back into the storage tank 15. When the electronic valve unit 27 is in the circulating state, it can be ensured that the cooling liquid flowing out of the liquid outlet channel 19 can only enter the circulation channel 25. In this way, in the circulating state, the cooling liquid flowing out of the liquid outlet channel 19 is not supplied to the tool mechanism 91, so the cooling effect on the tool mechanism 91 can be temporarily stopped.

It can be seen that, in this creation, when the cooling effect needs to be temporarily stopped, the electronic valve unit 27 can be switched to a circulating state, thereby selectively circulating the cooling fluid in the cooling device to avoid continuous By cooling, the temperature of the tool mechanism 91 can be maintained, and furthermore, the accuracy of processing can be maintained.

As shown in FIG. 6, a cooling device 30 for use in a machine tool with a selective internal circulation proposed in the second preferred embodiment of the present invention is basically the same as the first embodiment disclosed above, except for:

In addition to the three-way electronic valve 471, the electronic valve unit 47 further includes an auxiliary three-way electronic valve 472. The liquid inlet channel 37 and the circulation channel 45 are connected to the auxiliary three-way electronic valve 472 to achieve a connection relationship.

When the electronic valve unit 47 is switched to the pass-through state, the auxiliary three-way electronic valve 472 is switched to the cooling liquid of the liquid inlet channel 37 can flow in from the outside and flow inward to the liquid storage tank 35, but the circulation channel The coolant in 45 cannot flow into the auxiliary three-way electronic valve 472; when the electronic valve unit 47 is switched to the circulating state, the coolant in the auxiliary three-way electronic valve 472 is switched to the inlet passage 37 cannot flow in from the outside, However, only the cooling liquid in the circulation channel 45 can flow into the liquid storage tank 35.

In the second embodiment, the auxiliary three-way electronic valve 472 is mainly for assisting the three-way electronic valve 471 to guide the flow of the cooling liquid in the switched-through state and the circulating state. Furthermore, it can also reduce the circulation In the state and without the auxiliary three-way electronic valve 472, the internal pressure of the tube body 99 (shown in FIG. 3) of the tool mechanism 91 (shown in FIG. 3) and the liquid inlet passage 37 is connected.

The remaining structures and achievable effects of the second embodiment are the same as those in the first embodiment disclosed above, and will not be repeated here.

As shown in FIG. 7, a cooling device 50 for use in a machine tool with selective internal circulation proposed in the third preferred embodiment of the present invention is basically the same as the first embodiment disclosed above, except for:

The electronic valve unit 67 does not have the three-way electronic valve, but has a liquid discharge electronic valve 671 and a circulation electronic valve 672. The liquid discharge electronic valve 671 is provided in the liquid discharge channel 59 and in the liquid inlet channel 57 The upper side is located behind the connection position of the circulation channel 65 and the liquid outlet channel 59 in terms of the liquid discharge direction; the circulation electronic valve 672 is disposed on the circulation channel 65.

When the electronic valve unit 67 is switched to the pass-through state, the liquid discharge electronic valve 671 is opened and the circulation electronic valve 672 is closed; when the electronic valve unit 67 is switched to the circulation state, the liquid discharge electronic valve 671 It closes and the circulation electronic valve 672 opens.

With the above structure, in actual operation, when the electronic valve unit 67 is switched to the pass-through state, the liquid discharge electronic valve 671 is opened to allow the cooling liquid in the liquid discharge channel 59 to pass through and flow out. The tool mechanism 91 (shown in FIG. 3) is cooled; and the circulation electronic valve 672 is closed so that the cooling liquid in the liquid outlet channel 59 does not flow through the circulation channel 65. In addition, when the electronic valve unit 67 is switched to the circulation state, the liquid discharge electronic valve 671 is closed and the circulation electronic valve 672 is opened, the coolant in the liquid discharge channel 59 cannot pass through the liquid discharge electronic valve 671, and It is forced to flow to the circulation channel 65, and the circulation electronic valve 672 is opened to pass through the circulation channel 65 and then enter the liquid inlet channel 57.

The rest of the structure and the achievable effects of the third embodiment are the same as those of the first embodiment disclosed above, and will not be repeated here.

As shown in FIG. 8, a cooling device 70 for use in a machine tool with a selective internal circulation proposed in the fourth preferred embodiment of the present invention is basically the same as the first embodiment disclosed above, except for:

In the fourth embodiment, there is no circulation channel in the first embodiment, and the electronic valve unit 87 is a four-way electronic valve 871. The four-way electronic valve 871 has four ports, one of which is connected In the liquid inlet channel 77, another connection port is connected to the liquid outlet channel 79, and the remaining two connection ports are used as the liquid outlet 88 and the liquid inlet 89. The four-way electronic valve 871 is controlled by the controller 73 and is switched to the via state or the circulation state.

Wherein, when the four-way electronic valve 871 is switched to the pass-through state, the cooling liquid flowing out of the liquid outlet channel 79 flows out from the liquid outlet 88 without flowing to the liquid inlet channel 77 and the liquid inlet 89; When the four-way electronic valve 871 is switched to the circulating state, the cooling liquid flowing out of the liquid outlet channel 79 flows to the liquid inlet channel 77 without flowing to the liquid outlet 88 and the liquid inlet 89.

In this way, only one four-way electronic valve 871 can be used to replace the three-way electronic valve and the circulation channel in the foregoing first embodiment, and the effect of switching the flow direction of the cooling liquid can also be achieved.

The rest of the structure and the achievable effects of the fourth embodiment are the same as the first embodiment disclosed above, and will not be repeated here.

10: Cooling device used in machine tools with selective internal circulation

11: Shell

13: Controller

15: Liquid storage tank

17: Liquid inlet channel

19: Outlet channel

21: Pump

23: Cooling the compressor

231: Condenser

25: circulation channel

27 Electronic valve unit

271: Three-way electronic valve

30: Cooling device used in machine tools and with selective internal circulation

35: storage tank

37: Liquid inlet channel

45: circulation channel

47: Electronic valve unit

471: Three-way electronic valve

472: auxiliary three-way electronic valve

50: Cooling device used in machine tools with selective internal circulation

57: Liquid inlet channel

59: Outlet channel

65: circulation channel

67: Electronic valve unit

671: Liquid outlet electronic valve

672: Circulating electronic valve

70: Cooling device used in machine tools with selective internal circulation

77: Liquid inlet channel

79: Outlet channel

87: Electronic valve unit

871: Four-way electronic valve

88: Outlet

89: Liquid inlet

91: Tool mechanism parts

99: tube body

FIG. 1 is a block diagram of the first preferred embodiment of the present creation. FIG. 2 is a circuit block diagram of the first preferred embodiment of the present creation. FIG. 3 is an assembly diagram of the first preferred embodiment of the present creation. FIG. 4 is an action diagram of the first preferred embodiment of the present invention, showing the flow direction of the cooling liquid when the electronic valve unit is switched to the pass-through state. FIG. 5 is another action diagram of the first preferred embodiment of the present invention, showing the flow direction of the cooling liquid when the electronic valve unit is switched to the circulation state. FIG. 6 is a block diagram of the second preferred embodiment of the present creation. FIG. 7 is a block diagram of the third preferred embodiment of the present creation. FIG. 8 is a block diagram of the fourth preferred embodiment of the present creation.

10: Cooling device used in machine tools with selective internal circulation

11: Shell

13: Controller

15: Liquid storage tank

17: Liquid inlet channel

19: Outlet channel

21: Pump

23: Cooling the compressor

231: Condenser

27: Electronic valve unit

271: Three-way electronic valve

91: Tool mechanism parts

99: tube body

Claims (5)

A cooling device for a machine tool with selective internal circulation, including: A shell A controller A liquid storage tank, which is located in the outer shell and stores coolant inside; A liquid inlet channel is provided in the casing and communicates with the liquid storage tank; A liquid outlet channel, which is provided in the casing and communicates with the liquid storage tank; A pump electrically connected to the controller, and the pump connected to the liquid discharge channel, controlled by the controller to drive the cooling liquid in the liquid discharge channel to move away from the liquid storage tank; and A cooling compressor, located in the housing and electrically connected to the controller, the cooling compressor has a condenser tube extending through at least one of the liquid inlet channel, the liquid storage tank, or the liquid outlet channel; It is characterized by more including: A circulation channel, one end of which is connected to the liquid inlet channel, and this connection position is located behind the pump on the liquid inlet channel in terms of the liquid outlet direction, and the other end of the circulation channel is connected to the liquid outlet channel; and An electronic valve unit, in the three of the liquid inlet channel, the circulation channel and the liquid outlet channel, the electronic valve unit is provided at least in the liquid outlet channel and is electrically connected to the controller, under the control of the controller Switch to a pass-through state or a cycle state; Wherein, when the electronic valve unit is switched to the through state, the cooling liquid flowing out of the liquid outlet channel will not flow to the liquid inlet channel through the circulation channel; when the electronic valve unit is switched to the circulation state, the liquid outlet The cooling fluid flowing out of the channel does not flow out of the cooling device, but only flows through the circulation channel to the liquid inlet channel. According to item 1 of the patent application scope, a cooling device for a machine tool with selective internal circulation, wherein: the electronic valve unit has a three-way electronic valve, and the liquid outlet channel and the circulation channel are connected to the Three-way electronic valve to achieve the connection relationship; when the electronic valve unit is switched to the pass-through state, the cooling fluid that is the three-way electronic valve to the outlet channel can flow out, but cannot flow into the circulation channel; When the electronic valve unit is switched to the circulation state, the cooling fluid for the three-way electronic valve to the outlet channel cannot flow out, but can only flow into the circulation channel. According to item 2 of the patent application scope, a cooling device for a machine tool with selective internal circulation, wherein: the electronic valve unit further includes an auxiliary three-way electronic valve, and the liquid inlet channel and the circulation channel are connected to The auxiliary three-way electronic valve is used to achieve the connection relationship; when the electronic valve unit is switched to the pass-through state, the cooling liquid that is the auxiliary three-way electronic valve to the liquid inlet channel can flow from the outside to the inside to the liquid storage tank , But the cooling fluid in the circulation channel cannot flow in; when the electronic valve unit is switched to the circulation state, the cooling fluid that is the auxiliary three-way electronic valve switched to the liquid inlet channel cannot flow from outside to inside, but only allows The cooling liquid in the circulation channel flows into the liquid storage tank. According to item 1 of the patent application scope, a cooling device for a machine tool with selective internal circulation, wherein: the electronic valve unit has a liquid discharge electronic valve and a circulation electronic valve, and the liquid discharge electronic valve is provided in the The liquid outlet channel, and the liquid inlet channel is located behind the connection position of the circulation channel and the liquid outlet channel in terms of the liquid outlet direction; the circulation electronic valve is provided on the circulation channel; the electronic valve unit is switched to When it is in the through state, the outlet electronic valve is opened and the circulation electronic valve is closed; when the electronic valve unit is switched to the circulation state, the outlet electronic valve is closed and the circulation electronic valve is opened. A cooling device used in a machine tool with selective internal circulation includes: A shell A controller A liquid storage tank, which is located in the outer shell and stores coolant inside; A liquid inlet channel is provided in the casing and communicates with the liquid storage tank; A liquid outlet channel, which is provided in the casing and communicates with the liquid storage tank; A pump is provided in the casing and is electrically connected to the controller. The pump is connected to the liquid discharge channel and is controlled by the controller to drive the cooling liquid in the liquid discharge channel to the outlet of the liquid storage tank Moving in directions; and A cooling compressor, located in the housing and electrically connected to the controller, the cooling compressor has a condenser tube extending through the inside of the liquid storage tank; It is characterized by more including: A four-way electronic valve has four ports, one of which is connected to the liquid inlet channel, the other is connected to the liquid outlet channel, and the remaining two ports are used as the liquid outlet and the liquid inlet. The four-way electronic valve is controlled by the controller to switch to a through state or a circulating state; Wherein, when the four-way electronic valve is switched to the through state, the cooling liquid flowing out of the liquid outlet channel flows out of the liquid outlet without flowing to the liquid inlet channel and the liquid inlet; When the valve is switched to the circulation state, the cooling liquid flowing out of the liquid outlet channel flows to the liquid inlet channel, but does not flow to the liquid outlet and the liquid inlet.

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