阅读说明：本技术 机床自动供油润滑系统及机床自动供油润滑方法 (Automatic oil supply lubricating system and method for machine tool ) 是由 黎久奎 于 2020-05-14 设计创作，主要内容包括：本发明属于数控机床技术领域,尤其涉及一种机床自动供油润滑系统及机床自动供油润滑方法,机床自动供油润滑系统包括充油电路和补油电路；所述补油电路包括第二时间继电器和第三时间继电器；所述第二时间继电器的常闭触点的一端连接于所述第三时间继电器的线圈的一端,所述第三时间继电器的常开触点的一端分别连接于所述第二接触器的线圈和所述第二时间继电器的线圈的一端；机床自动供油润滑系统解决了机床油管不打油或打油不够的情况,及时对机床的各个部位进行充分润滑,让机床使用寿命大幅提高。(The invention belongs to the technical field of numerical control machines, and particularly relates to an automatic oil supply lubricating system and an automatic oil supply lubricating method for a machine tool, wherein the automatic oil supply lubricating system for the machine tool comprises an oil charge circuit and an oil supplement circuit; the oil supplementing circuit comprises a second time relay and a third time relay; one end of a normally closed contact of the second time relay is connected to one end of a coil of the third time relay, and one end of a normally open contact of the third time relay is respectively connected to the coil of the second contactor and one end of the coil of the second time relay; the automatic oil supply and lubrication system for the machine tool solves the problem that the oil pipe of the machine tool is not or not enough to be oiled, and can timely and fully lubricate each part of the machine tool, so that the service life of the machine tool is greatly prolonged.)

1. An automatic oil supply lubricating system for a machine tool, comprising:

the oil charging circuit comprises a first normally open switch, a first contactor, a second contactor and a first time relay; one ends of the normally open contacts of the first normally open switch and the first contactor are connected to one end of the normally closed contact of the first time relay, and the other end of the normally closed contact of the first time relay is connected to one end of the coil of the first contactor and one end of the coil of the first time relay respectively; one end of a normally open contact of the first contactor is connected to one end of a coil of the second contactor, and the other end of the coil of the second contactor is connected with an oil pump;

an oil replenishment circuit comprising a second time relay and a third time relay; one end of a normally closed contact of the second time relay is connected to one end of a coil of the third time relay, and one end of a normally open contact of the third time relay is connected to one end of the coil of the second contactor and one end of the coil of the second time relay respectively.

2. The automatic machine tool oil supply and lubrication system according to claim 1, further comprising a manual driving circuit, wherein the manual driving circuit comprises a second normally open switch and a third contactor; one end of the second normally open switch is connected to one end of the coil of the third contactor, one end of a normally open contact of the third contactor is connected to one end of a normally closed contact of the first contactor, and the other end of the normally closed contact of the first contactor is connected to one end of a normally closed contact of the first time relay; the one end of the normally closed contact of third contactor connects in the one end of the normally open contact of first contactor, the other end of the normally open contact of first contactor connect in the one end of the normally closed contact of first time relay, the other end of the normally closed contact of first time relay connect respectively in the coil of first contactor and the one end of the coil of first time relay.

3. The automatic oil supply lubrication system for the machine tool according to claim 1, further comprising a pressure detection circuit; the pressure detection circuit comprises a fourth contactor, a fifth contactor and a comparison function module; one end of a normally open contact and one end of a normally closed contact of the fourth contactor are both connected to one end of the comparison function module, the other end of the comparison function module is connected to one end of the fourth time relay, and the other end of the fourth time relay is connected to one end of a coil of the fifth contactor; and one end of the normally closed contact of the fifth contactor is respectively connected with the normally closed contact of the first time relay, the normally closed contact of the second time relay, the normally open contact of the third time relay and one end of the normally open contact of the first contactor.

4. The automatic oil supply and lubrication system for the machine tool according to claim 3, further comprising an oil pressure alarm circuit; the oil pressure alarm circuit comprises a fifth time relay and a sixth contactor; the one end of the normally open contact of second contactor connect in the one end of the normally open contact of fourth contactor and normally closed contact, the normally open contact of fourth contactor and the other end of normally closed contact all connect in the one end of comparison function module, the other end of comparison function module connect in the one end of fifth time relay's coil, the other end of fifth time relay's coil connect in the one end of sixth contactor's coil.

5. The automatic oil supply and lubrication system for the machine tool according to claim 3, further comprising an oil level alarm circuit, wherein the oil level alarm circuit comprises a seventh contactor and an eighth contactor; and one ends of the normally open contact and the normally closed contact of the seventh contactor are connected to one end of the comparison functional module, and the other end of the comparison functional module is connected to one end of the coil of the eighth contactor.

6. An automatic oil supply lubrication method for a machine tool is characterized by comprising the following oil supply steps:

s100: starting up to trigger an oil pump to work, and starting to calculate the time for pumping oil to an oil pipe by the oil pump;

s200: detecting the pressure in the oil pipe, acquiring the pressure in the oil pipe to obtain an actual pressure value of the oil pipe, judging whether the actual pressure value is equal to or greater than a preset pressure threshold value, and if so, stopping pumping oil by the oil pump;

s300: when the preset time is reached, the oil pump continues to work and supplies oil to the oil pipe;

s400: and detecting the pressure in the oil pipe again, acquiring the pressure value in the oil pipe to obtain the actual pressure value, judging whether the actual pressure value is greater than the preset pressure threshold value, and if so, stopping pumping oil by the oil pump.

7. The automatic oil supply and lubrication method for the machine tool according to claim 6, wherein in the step S200 and the step S400, when the actual pressure value is less than the pressure threshold value, the oil pump is continuously operated; and when the actual pressure value reaches the pressure threshold value, the oil pump stops working.

8. The automatic oil supply and lubrication method for the machine tool according to claim 6, wherein in the step S200 and the step S400, when the actual pressure value reaches the pressure threshold value, timing is started, and the oil pump is stopped after a preset time.

9. The automatic oil supply and lubrication method for the machine tool according to claim 6, wherein in the step S200 and the step S400, when the actual pressure value reaches the pressure threshold value, timing is started; and after the preset time is reached, if the oil pump still works, alarming is started.

10. The automatic oil supply and lubrication method for the machine tool according to claim 6, wherein in the steps S200 and S400, an oil level sensor is arranged in an oil tank connected with the oil pump, and when the lubricating oil in the oil tank is too little, an alarm is started.

Technical Field

The invention belongs to the technical field of numerical control machines, and particularly relates to an automatic oil supply lubricating system and an automatic oil supply lubricating method for a machine tool.

Background

The numerical control machine tool is a digital control machine tool for short, and is an automatic machine tool provided with a program control system. The control system is capable of logically processing and decoding a program defined by a control code or other symbolic instructions, represented by coded numbers, which are input to the numerical control device via the information carrier. After operation, the numerical control device sends out various control signals to control the action of the machine tool, and the parts are automatically machined according to the shape and the size required by the drawing. The numerical control machine tool well solves the problem of machining of complex, precise, small-batch and various parts, is a flexible and high-efficiency automatic machine tool, represents the development direction of the control technology of modern machine tools, and is a typical mechanical and electrical integration product.

Numerical control machine tool machining work needs long-time movement, and moving parts such as its lead screw and guide rail need last the oil feed lubrication, otherwise can influence numerical control machining action, can cause rusting of moving parts such as lead screw and guide rail even, shortens the life-span of digit control machine tool. The existing oil supply system of the numerical control machine tool adopts a unified oil supply mode, has a simple structure and poor reliability, and can often cause the condition that an oil pipe of the machine tool does not or is not enough to pump oil, so that the service life of the machine tool is greatly influenced, and the machining precision of the machine tool is influenced.

Disclosure of Invention

The invention aims to provide an automatic oil supply lubricating system and an automatic oil supply lubricating method for a machine tool, and aims to solve the technical problem that in the prior art, the oil supply system of a numerical control machine tool adopts a unified oil supply mode, so that the situation that oil is not pumped into an oil pipe of the machine tool or the oil is not pumped into the oil pipe is often caused.

In order to achieve the above object, an embodiment of the present invention provides an automatic oil supply and lubrication system for a machine tool, including:

the oil charging circuit comprises a first normally open switch, a first contactor, a second contactor and a first time relay; one ends of the normally open contacts of the first normally open switch and the first contactor are connected to one end of the normally closed contact of the first time relay, and the other end of the normally closed contact of the first time relay is connected to one end of the coil of the first contactor and one end of the coil of the first time relay respectively; one end of a normally open contact of the first contactor is connected to the normally closed contact of the first time relay and one end of a coil of the second contactor respectively, and the other end of the coil of the second contactor is connected with an oil pump;

an oil replenishment circuit comprising a second time relay and a third time relay; one end of a normally closed contact of the second time relay is connected to one end of a coil of the third time relay, and one end of a normally open contact of the third time relay is connected to one end of the coil of the second contactor and one end of the coil of the second time relay respectively.

Optionally, the automatic oil supply and lubrication system for the machine tool further comprises a manual driving circuit, and the manual driving circuit comprises a second normally open switch and a third contactor; one end of the second normally open switch is connected to one end of the coil of the third contactor, one end of a normally open contact of the third contactor is connected to one end of a normally closed contact of the first contactor, and the other end of the normally closed contact of the first contactor is connected to one end of a normally closed contact of the first time relay; the one end of the normally closed contact of third contactor connects in the one end of the normally open contact of first contactor, the other end of the normally open contact of first contactor connect in the one end of the normally closed contact of first time relay, the other end of the normally closed contact of first time relay connect respectively in the coil of first contactor and the one end of the coil of first time relay.

Optionally, the automatic oil supply and lubrication system of the machine tool further comprises a pressure detection circuit; the pressure detection circuit comprises a fourth contactor, a fifth contactor and a comparison function module; one end of a normally open contact and one end of a normally closed contact of the fourth contactor are both connected to one end of the comparison function module, the other end of the comparison function module is connected to one end of the fourth time relay, and the other end of the fourth time relay is connected to one end of a coil of the fifth contactor; and one end of the normally closed contact of the fifth contactor is respectively connected with the normally closed contact of the first time relay, the normally closed contact of the second time relay, the normally open contact of the third time relay and one end of the normally open contact of the first contactor.

Optionally, the automatic oil supply and lubrication system of the machine tool further comprises an oil pressure alarm circuit; the oil pressure alarm circuit comprises a fifth time relay and a sixth contactor; the one end of the normally open contact of second contactor connect in the one end of the normally open contact of fourth contactor and normally closed contact, the normally open contact of fourth contactor and the other end of normally closed contact all connect in the one end of comparison function module, the other end of comparison function module connect in the one end of fifth time relay's coil, the other end of fifth time relay's coil connect in the one end of sixth contactor's coil.

Optionally, the automatic oil supply and lubrication system for the machine tool further comprises an oil level alarm circuit, wherein the oil level alarm circuit comprises a seventh contactor and an eighth contactor; and one ends of the normally open contact and the normally closed contact of the seventh contactor are connected to one end of the comparison functional module, and the other end of the comparison functional module is connected to one end of the coil of the eighth contactor.

One or more technical schemes in the automatic oil supply and lubrication system for the machine tool provided by the embodiment of the invention at least have one of the following technical effects: the automatic oil supply lubricating system for the machine tool is applied to the numerical control machine tool, solves the problem that oil does not flow into the oil pipe of the machine tool or the oil does not flow enough, fully lubricates all parts of the machine tool in time, and greatly prolongs the service life of the machine tool.

The invention also provides an automatic oil supply and lubrication method for the machine tool, which comprises the following oil supply steps:

s100: starting up to trigger an oil pump to work, and starting to calculate the time for pumping oil to an oil pipe by the oil pump;

s200: detecting the pressure in the oil pipe, acquiring the pressure in the oil pipe to obtain an actual pressure value of the oil pipe, judging whether the actual pressure value is equal to or greater than a preset pressure threshold value, and if so, stopping pumping oil by the oil pump;

s300: when the preset time is reached, the oil pump continues to work and supplies oil to the oil pipe;

s400: and detecting the pressure in the oil pipe again, acquiring the pressure value in the oil pipe to obtain the actual pressure value, judging whether the actual pressure value is greater than the preset pressure threshold value, and if so, stopping pumping oil by the oil pump.

Alternatively, in the step S200 and the step S400, when the actual pressure value is less than the pressure threshold value, the oil pump continues to operate; and when the actual pressure value reaches the pressure threshold value, the oil pump stops working.

Optionally, in the step S200 and the step S400, when the actual pressure value reaches the pressure threshold, timing is started, and the oil pump stops working after a preset time is reached.

Optionally, in the step S200 and the step S400, when the actual pressure value reaches the pressure threshold, timing is started; and after the preset time is reached, if the oil pump still works, alarming is started.

Alternatively, in the steps S200 and S400, a fuel level sensor is disposed in a fuel tank connected to the oil pump, and when the lubricating oil in the fuel tank is too low, an alarm is initiated.

One or more technical schemes in the automatic oil supply and lubrication method for the machine tool provided by the embodiment of the invention have at least one of the following technical effects: the method realizes secondary oil pumping, the oil pump starts to pump oil after starting up until the actual pressure value of the oil pipe reaches a pressure threshold value, the oil pumping is stopped, the machine tool continues to work, the waiting time is preset, and after the preset time is reached, the oil pump continues to supplement oil into the oil pipe, so that lubricating oil in the oil pipe is kept sufficient all the time, the problem that the oil pipe of the machine tool does not pump oil or pump oil insufficiently is solved, all parts of the machine tool are lubricated sufficiently in time, and the service life of the machine tool is greatly prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is an electrical connection schematic diagram of an automatic oil supply and lubrication system of a machine tool according to an embodiment of the invention.

Fig. 2 is an electrical connection schematic diagram of an automatic oil supply and lubrication system of a machine tool according to an embodiment of the invention.

Fig. 3 is a schematic step diagram of an automatic oil supply and lubrication method for a machine tool according to an embodiment of the present invention.

The electric actuator of the present invention includes: the device comprises a first normally-open switch SA1, a second normally-open switch SA2, a first contactor KM1, a second contactor KM2, a third contactor KM3, a fourth contactor KM4, a fifth contactor KM5, a sixth contactor KM6, a seventh contactor KM7, an eighth contactor KM8, a first time relay 1, a second time relay KT2, a third time relay KT3, a fourth time relay KT4, a fifth time relay KT5 and a comparison function module CMP.

Wherein, in the figures, the respective reference numerals:

10-oil charging circuit 20-oil supplementing circuit 30-manual driving circuit

40-pressure detection circuit 50-oil pressure alarm circuit 60-oil level alarm circuit.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-3 are exemplary and intended to be used to illustrate embodiments of the invention, and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In one embodiment of the present invention, as shown in fig. 1, an automatic oil supply lubrication system for a machine tool is provided, which includes an oil charge circuit 10 and an oil supply circuit 20.

The oil-filled circuit 10 comprises a first normally-open switch SA1, a first contactor KM1, a second contactor KM2 and a first time relay KT 1; one ends of the normally open contacts of the first normally open switch SA1 and the first contactor KM1 are both connected to one end of the normally closed contact of the first time relay KT1, and the other end of the normally closed contact of the first time relay KT1 is connected to one end of the coil of the first contactor KM1 and one end of the coil of the first time relay KT1 respectively; one end of a normally open contact of the first contactor KM1 is connected to one end of a coil of the second contactor KM2, and the other end of the coil of the second contactor KM2 is connected to an oil pump;

wherein the oil supply circuit 20 comprises a second time relay KT2 and a third time relay KT 3; one end of the normally closed contact of the second time relay KT2 is connected to one end of the coil of the third time relay KT3, and one end of the normally open contact of the third time relay KT3 is connected to the coil of the second contactor KM2 and one end of the coil of the second time relay KT2 respectively.

After the automatic oil supply and lubrication system of the machine tool is electrified, the first normally-open switch SA1 is closed, the coil of the first contactor KM1 is electrified, the normally-open contact of the first contactor KM1 is closed, the coil of the second contactor KM2 is electrified, the second contactor KM2 is electrically connected with the oil pump, the oil pump starts to pump oil after the coil of the second contactor KM2 is electrified, and meanwhile, the first time relay KT1 starts to time; the first time relay KT1 has arrived preset time, and the normally closed contact of first time relay KT1 breaks off, and the coil outage of first contactor KM1, the normally open contact disconnection of first contactor KM1, the coil outage of second contactor KM2, the oil pump stop work.

When the machine tool automatic oil supply lubricating system is powered on, a coil of a third time relay KT3 is electrified, the third time relay KT3 starts timing, after the third time relay KT3 reaches the preset time (10 ms-1800 ms), a normally open contact of the third time relay KT3 is closed, a coil of a second contactor KM2 is electrified, an oil pump starts pumping oil, a coil of a second time relay KT2 is electrified, the second time relay KT2 starts timing, after the preset time (5 s-10 s), the normally closed contact of the second time relay KT2 is disconnected, the coil of the third time relay KT3 is powered off, the normally open contact of the third time relay KT3 is disconnected, the coil of the second contactor KM2 is powered off, and the oil pump stops pumping oil.

In the embodiment of the invention, the automatic oil supply and lubrication system of the machine tool is applied to the numerical control machine tool, and the oil charge circuit 10 and the oil supplement circuit 20 are arranged, so that the condition that oil is not pumped into an oil pipe of the machine tool or is not pumped into the oil pipe is solved, all parts of the machine tool are lubricated sufficiently in time, and the service life of the machine tool is greatly prolonged.

In another embodiment of the invention, as shown in fig. 1, the automatic oil supply and lubrication system for the machine tool further comprises a manual driving circuit 30, wherein the manual driving circuit 30 comprises a second normally open switch SA2 and a third contactor KM 3; one end of the second normally-open switch SA2 is connected to one end of the coil of the third contactor KM3, one end of the normally-open contact of the third contactor KM3 is connected to one end of the normally-closed contact of the first contactor KM1, and the other end of the normally-closed contact of the first contactor KM1 is connected to one end of the normally-closed contact of the first time relay KT 1; one end of a normally closed contact of the third contactor KM3 is connected to one end of a normally open contact of the first contactor KM1, the other end of the normally open contact of the first contactor KM1 is connected to one end of a normally closed contact of the first time relay KT1, and the other end of the normally closed contact of the first time relay KT1 is connected to one end of a coil of the first contactor KM1 and one end of a coil of the first time relay KT1, respectively; when needing manual oiling, closed second normally open switch SA2, the coil of third contactor KM3 gets electric, sends the rising edge signal, and third contactor KM 3's normally open contact is closed, and first contactor KM 1's coil gets electric, and first contactor KM 1's normally open contact is closed, and second contactor KM 2's coil gets electric, and the oil pump begins to pump oil, adds manual oiling function, extensive applicability.

In another embodiment of the present invention, as shown in fig. 1-2, the automatic oil supply and lubrication system for a machine tool further includes a pressure detection circuit 40; the pressure detection circuit 40 comprises a fourth contactor KM4, a fifth contactor KM5 and a comparison function module CMP; one ends of a normally open contact and a normally closed contact of the fourth contactor KM4 are both connected to one end of the comparison function module CMP, the other end of the comparison function module CMP is connected to one end of the fourth time relay KT4, and the other end of the fourth time relay KT4 is connected to one end of the coil of the fifth contactor KM 5; one end of the normally closed contact of the fifth contactor KM5 is connected to the normally closed contact of the first time relay KT1, the normally closed contact of the second time relay KT2, the normally open contact of the third time relay KT3 and one end of the normally open contact of the first contactor KM1, respectively; the comparison function module CMP can set parameters 0 or 1, the normally open contact of the fourth contactor KM4 is connected with the 0 end of the comparison function module CMP, and the normally closed contact of the fourth contactor KM4 is connected with the 1 end of the comparison function module CMP; the fourth contactor KM4 is connected with the pressure sensor, after the pressure in the oil pipe reaches a pressure threshold value, the comparison function module CMP is conducted, the coil of the fifth contactor KM5 is electrified, the normally closed contact of the fifth contactor KM5 is disconnected, the oil filling circuit 10 and the oil supplementing circuit 20 are disconnected simultaneously, the oil pump stops pumping oil, the structure is stable, and the safety performance is high.

In another embodiment of the present invention, as shown in fig. 1-2, the automatic oil supply and lubrication system for a machine tool further includes an oil pressure alarm circuit 50; the oil pressure alarm circuit 50 comprises a fifth time relay KT5 and a sixth contactor KM 6; one end of a normally open contact of the second contactor KM2 is connected to one ends of a normally open contact and a normally closed contact of the fourth contactor KM4, the other ends of the normally open contact and the normally closed contact of the fourth contactor KM4 are both connected to one end of the comparison function module CMP, the other end of the comparison function module CMP is connected to one end of the coil of the fifth time relay KT5, and the other end of the coil of the fifth time relay KT5 is connected to one end of the coil of the sixth contactor KM 6; the coil of the second contactor KM2 is electrified, the oil pump pumps oil, the normally open contact of the second contactor KM2 is closed, the comparison function module CMP is conducted after the pressure in the oil pipe reaches a pressure threshold value, the fifth time relay KT5 starts timing, and the coil of the sixth contactor KM6 is electrified after the fifth time relay KT5 reaches preset time (10S); the coil of the sixth contactor KM6 is connected with a buzzer or an indicator lamp, and after the coil of the sixth contactor KM6 is electrified, the buzzer or the indicator lamp works to give an alarm.

In another embodiment of the invention, as shown in fig. 1-2, the automatic oil supply and lubrication system for the machine tool further comprises an oil level alarm circuit 60, wherein the oil level alarm circuit 60 comprises a seventh contactor KM7 and an eighth contactor KM 8; one ends of the normally open contact and the normally closed contact of the seventh contactor KM7 are both connected to one end of the comparison function module CMP, and the other end of the comparison function module CMP is connected to one end of the coil of the eighth contactor KM 8; the seventh contactor KM7 is connected with an oil level sensor, when lubricating oil is insufficient, the comparison function module CMP is conducted, the coil of the eighth contactor KM8 is electrified, and the coil of the eighth contactor KM8 is connected with a buzzer or an indicator lamp to give an alarm.

The invention also provides an automatic oil supply and lubrication method for the machine tool, which comprises the following oil supply steps as shown in figure 3:

s100: starting up to trigger an oil pump to work, and starting to calculate the time for pumping oil to an oil pipe by the oil pump;

s200: detecting the pressure in the oil pipe, acquiring the pressure value in the oil pipe to obtain an actual pressure value of the oil pipe, judging whether the actual pressure value is greater than a preset pressure threshold value, and if so, stopping pumping oil by the oil pump;

s300: when the preset time is reached, the oil pump continues to work and supplies oil to the oil pipe;

s400: and detecting the pressure in the oil pipe again, acquiring the pressure value in the oil pipe to obtain the actual pressure value, judging whether the actual pressure value is greater than a preset pressure threshold value, and if so, stopping pumping oil by the oil pump.

In the embodiment of the invention, the automatic oil supply and lubrication method for the machine tool is applied to a numerical control machine tool, secondary oil pumping is realized, the oil pump starts to pump oil after starting up until the actual pressure value of the oil pipe reaches a pressure threshold value, oil pumping is stopped, the machine tool continues to work, the waiting time is preset, and after the preset time is reached, the oil pump continues to supplement oil into the oil pipe, so that lubricating oil in the oil pipe is kept sufficient all the time, the problem that the oil pipe of the machine tool does not pump oil or pumps oil insufficiently is solved, all parts of the machine tool are lubricated sufficiently in time, and the service life of the machine tool is greatly prolonged.

Specifically, a lubricating oil lamp is arranged and connected with a coil of the first contactor KM1, the coil of the first contactor KM1 is electrified, and the lubricating oil lamp is on; when the oil pump works to pump oil, the lubricating oil lamp is on for displaying the working state of the numerical control machine tool, the monitoring is convenient, the starting triggers the oil pump to work, the lubricating oil lamp is on, the oil pump stops pumping oil, and the lubricating oil lamp is off.

In another embodiment of the present invention, in the step S200 and the step S400 of the method for automatically supplying oil and lubricating a machine tool, when the actual pressure value of the oil pipe is less than the pressure threshold value, the oil pump continues to operate; when the actual pressure value of the oil pipe reaches a pressure threshold value, the oil pump stops working; specifically, can select the PLC controller among the prior art of using, oil pump and digit control machine tool are connected to the PLC controller, and through comparison instruction (the parameter setting 0 or 1) in the PLC controller, the actual pressure value of oil pipe reaches pressure threshold value, and the digit control machine tool takes place the signal to the PLC controller in, and comparison instruction's parameter 1 satisfies the condition and switches on, and the PLC controller control oil pump stop work.

In another embodiment of the present invention, in the step S200 and the step S400 of the method for automatically supplying oil and lubricating a machine tool, when the actual pressure value reaches the pressure threshold value, timing is started, and the oil pump stops working after a preset time is reached; by timing, the accuracy of pressure detection is improved.

In another embodiment of the present invention, in the step S200 and the step S400 of the automatic oil supply lubrication method for a machine tool, when the actual pressure value reaches the pressure threshold, a time count is started; and after the preset time is reached, if the oil pump still works, alarming is started.

In another embodiment of the present invention, in the step S200 and the step S400 of the method for automatically supplying oil to and lubricating a machine tool, an oil level sensor is disposed in an oil tank connected to the oil pump, and when the amount of lubricating oil in the oil tank is too small, an alarm is initiated to facilitate monitoring of the operating state of the numerical control machine tool.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.