Minimum quantity lubrication oil supply device and system

Abstract

The utility model discloses a minimum quantity lubrication oil supply device and system. The minimum quantity lubrication oil supply device comprises a control unit, an oil supply unit, a pressurization unit and an oil injection unit, the control unit is electrically connected with the oil supply unit, the pressurization unit and the oil injection unit. The oil supply unit is used for supplying oil to the supercharging unit, and the oil flows to the oil injection unit after being supercharged by the supercharging unit; the oil supply unit is provided with m oil tanks connected in parallel, all the oil tanks or (m-n) oil tanks supply oil to the pressurizing unit at the same time, m is larger than or equal to 2, and n is larger than or equal to 1 and smaller than or equal to m-1; the oil injection unit comprises a plurality of oil injection branches which are connected in parallel, and each oil injection branch is provided with an electronic pump; and the control unit is configured to control the oil supply unit to output oil and the pressurizing unit to work, and independently control each electronic pump to act according to the same or different action parameters. According to the multi-way oil supply device, independent and controllable accurate adjustment of multi-way oil quantity can be achieved, various oil products can be supplied, and multiple purposes are achieved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of production and manufacturing technology, and in particular to a minimal lubrication oil supply device and system. Background Art

[0002] With the development of advanced manufacturing technology and the growing awareness of environmental, safety, and health protection, a new type of green processing technology has emerged in recent years. This includes energy conservation and emission reduction, minimal lubrication, and precision multi-point adjustable air conditioner fin processing.

[0003] The high-speed fin stamping production line is one of the important equipment for the production of evaporators and condensers in air conditioners. The daily working hours are more than 20 hours. The raw materials of aluminum foil / copper foil for fin production are thin and easily deformed. During the stretching and stamping process, stamping oil must be applied to play a lubricating role to avoid stamping cracking and ensure the stamping effect. At the same time, the stamping frequency is very high, which can instantly increase the local temperature, and stamping oil can play a cooling role and improve the quality of stamped parts. Therefore, stamping oil is indispensable in the production process, and the daily consumption is relatively large. If there is too much stamping oil, it will cause local wrinkling, affect the exhaust of air during stamping, and cause the fins to stick to the mold. In severe cases, it will damage the mold and cause irreparable losses. The lubrication system in the existing technology cannot realize the supply of stamping oil to the high-speed fin stamping production line, and there are problems such as high oil consumption and serious air pollution in the workshop. Utility Model Content

[0004] The utility model provides a micro-lubrication oil supply device and system, which can provide accurate oil quantity to lubrication points, avoid the problem that the oil mist concentration of each line of the original oil supply system cannot be independently regulated, provide a variety of oil products, and realize multi-purpose use of one machine.

[0005] In a first aspect, an embodiment of the present invention provides a minimal lubrication oil supply device,

[0006] It includes a control unit and an oil supply unit, a boost unit, and an oil injection unit connected in sequence; the control unit is electrically connected to the oil supply unit, the boost unit, and the oil injection unit respectively; the oil supply unit is used to supply oil to the boost unit, and the oil flows to the oil injection unit after being boosted by the boost unit;

[0007] The oil supply unit is provided with m oil tanks connected in parallel, and all oil tanks or mn oil tanks supply oil to the boosting unit at the same time, wherein m≥2, 1≤n≤m-1;

[0008] The fuel injection unit comprises a plurality of fuel injection branches connected in parallel, and each fuel injection branch is equipped with an electronic pump;

[0009] The control unit is configured to control the oil supply unit to output oil, the boost unit to operate, and independently control each of the electronic pumps to operate according to the same or different action parameters.

[0010] Optionally, m is equal to 2, and the oil tank includes a first oil tank and a second oil tank connected in parallel, and the first oil tank and the second oil tank are used to store different oils.

[0011] Furthermore, the boosting unit further includes a first boosting pump, a second boosting unit pump and a driving module, wherein the driving module is respectively connected to the first boosting pump and the second boosting unit pump through two driving branches connected in parallel, and the driving module includes a compressed air source, a pressure regulator, a first starting valve and a second starting valve connected in sequence, and the first starting valve and the second starting valve are respectively provided on the two driving branches;

[0012] The boosting unit is specifically configured to control the opening and closing of the first boosting pump and the second boosting pump according to a second control signal sent by the control unit, and to adjust the preset pressure through the pressure regulator.

[0013] Optionally, the boosting unit further includes two boosting branches respectively connected to the first boosting pump and the second boosting pump, and the two boosting branches are respectively provided with a first one-way valve and a second one-way valve, and the two boosting branches are connected to the fuel injection unit after being combined.

[0014] Furthermore, an air source filter is provided between the compressed air source and the pressure regulator.

[0015] Furthermore, the oil supply unit further includes two oil supply branches connected to the first oil tank and the second oil tank, respectively. One of the oil supply branches is provided with a first filter and a first switching valve, and the other oil supply branch is provided with a second filter and a second switching valve. The first filter and the second filter are respectively connected to the oil tanks on the two oil supply branches. The two oil supply branches are connected to the boost unit after being combined.

[0016] The oil supply unit is specifically used to control the opening and closing of the first switching valve and the second switching valve according to the first control signal sent by the control unit, so that one of the first oil tank and the second oil tank is connected to the boosting unit.

[0017] Furthermore, the first fuel tank and the second fuel tank are provided with a liquid level detector, a fuel filling port and an oil drain port.

[0018] Furthermore, a pressure detection unit is provided between the boost unit and the fuel injection unit.

[0019] Optionally, a flow meter is further provided between the boosting unit and the oil supply unit.

[0020] In the second aspect, the present invention also provides a minimum lubrication system, including the minimum lubrication oil supply device described in any embodiment of the present invention, each end of the oil injection branch is connected to an atomization module with a gas inlet, the atomization module includes an atomizer, an air source and a high-speed solenoid valve between the air source and the atomizer, the atomizer is used to mix oil and gas to form oil mist to lubricate the lubrication point.

[0021] The utility model provides a minimal lubrication oil supply device and system, wherein the minimal lubrication oil supply device includes a control unit and an oil supply unit, a boost unit, and an injection unit that are connected in sequence; the control unit is electrically connected to the oil supply unit, the boost unit, and the injection unit respectively; the oil supply unit is used to supply oil to the boost unit, and the oil flows to the injection unit after being pressurized by the boost unit; the oil supply unit is provided with m parallel oil tanks, and all oil tanks or mn oil tanks supply oil to the boost unit at the same time, wherein m≥2, 1≤n≤m-1, so as to meet different production requirements; the injection unit includes multiple parallel injection branches, each of which is equipped with an electronic pump, so as to realize precise control of each injection branch; the control unit is configured to control the oil supply unit to output oil, the boost unit to operate, and independently control each electronic pump to operate according to the same or different action parameters to realize a fine-tuning mode in which the oil volume of multiple channels is independently controllable. The utility model provides accurate oil quantity to the lubrication point, avoids the problem that the oil mist concentration of each channel of the original oil supply system cannot be independently regulated, provides multi-channel oil supply, realizes multi-purpose of one machine, and thus achieves more environmental protection, lower processing cost and more convenient centralized control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural diagram of a minimal lubrication oil supply device is provided for an embodiment of the utility model;

[0023] Figure 2 A schematic structural diagram of another minimal lubrication oil supply device provided in an embodiment of the present utility model;

[0024] Figure 3 A structural schematic diagram of a minimal lubrication system provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0026] The oil-gas concentrations in the existing oil supply system for air conditioner fin production lines are uncontrollable. The oil and gas distribution varies naturally with the internal airflow resistance within the pipeline. This makes it impossible to reduce or adjust the oil usage in a specific work area. The existing lubrication system has a fixed oil-gas ratio. While sufficient gas may be present in one area, the oil may exceed the required amount. While the appropriate amount may be present, insufficient oil may be present. Consequently, the system fails to adequately balance the oil requirements of various work areas. For example, the oil requirement for the cutter differs from that for the die punch. Generally, the die punch requires more oil than the rest. With a fixed oil-gas concentration, no adjustments can be made, effectively preventing unnecessary oil consumption. Other areas must follow the highest oil consumption, forcing them to operate at higher oil levels than required. Furthermore, there is no room for further improvement in workshop air quality, and this structure presents significant structural limitations. Another type of oil supply system uses multiple mechanical pumps for timed oil delivery. This structure delivers low oil frequency (approximately once every one or two minutes), large oil volumes per delivery, and low control precision. It also cannot independently adjust the oil supply to multiple corresponding positions. Due to the low oil supply frequency and large single oil volume, there is an initial period of oil supply, when the fins and die receive much more oil than actually required. However, after the oil pump stops supplying oil, the oil supply to the fins and die drops back to the actual required amount. For example, if a die is punching 100 fins, the oil pump will deliver the highest oil volume during the first punch, and the die and die will receive the highest oil volume. The oil volume decreases with each subsequent punch until the next pump is delivered. Therefore, to ensure that the final punch receives at least the required oil volume, the pump must deliver a volume greater than the average required volume. This is a problem inherent to this system structure and operating principle, and it is an unavoidable issue. It leads to unnecessary oil consumption during production, a high failure rate, and expensive repair costs.

[0027] Furthermore, the oil tank in the traditional oil supply system is an open bath structure, with an opening area of ​​approximately 1 square meter and no sealed top cover. This also leads to the problem of lubricating oil evaporating over a large area into the production workshop, which not only consumes oil but also pollutes the environment. Separate oil supply systems are also required to maintain a constant supply of oil to the oiling area to support high-speed punching operations. The need for two independent oil supply systems to operate the high-speed punch press increases the floor space required and makes on-site piping relatively unwieldy. In summary, the traditional oil supply system has the following problems: 1. The oil mist concentration of each channel cannot be independently controlled, which inevitably produces excess oil that adheres to the workpiece and causes waste. Excess oil mist drifts into the air and pollutes the workshop environment. 2. Traditional mechanical oil pumps have low oil control accuracy and uneven oil supply, resulting in additional oil waste. 3. Maintenance costs are high, the oil pump life is short, and the coordinated operation of two oil supply units is required.

[0028] The present invention provides a micro-lubrication oil supply device to solve the above problems in the prior art. Figure 1 The present invention provides a schematic diagram of the structure of a minimal lubrication oil supply device, referring to Figure 1 The minimal lubrication oil supply device includes a control unit 140 and an oil supply unit 110, a boost unit 120, and an injection unit 130 connected in sequence; the control unit 140 is electrically connected to the oil supply unit 110, the boost unit 120, and the injection unit 130 respectively; the oil supply unit 110 is used to supply oil to the boost unit 120, and the oil flows to the injection unit 130 after being pressurized by the boost unit 120; the oil supply unit 110 is provided with m parallel oil tanks, all oil tanks or mn oil tanks supply oil to the boost unit 120 at the same time, where m≥2, 1≤n≤m-1; the injection unit 120 includes multiple parallel injection branches, and each injection branch is equipped with an electronic pump; the control unit 140 is configured to control the oil supply unit 110 to output oil, the boost unit 120 to operate, and independently control each electronic pump to operate according to the same or different action parameters.

[0029] The m parallel fuel tanks can store different types of oil or the same type of oil. During the same time period, the m parallel fuel tanks storing the same type of oil simultaneously supply fuel to the boost unit 120 to meet the fuel demand. The fuel supply unit 110, boost unit 120, and fuel injection unit 130 are connected by fuel pipes, and the control unit 140 is in communication with each of the fuel supply unit 110, boost unit 120, and fuel injection unit 130.

[0030] Specifically, the fuel injection unit 130 is provided with multiple fuel injection branches connected in parallel, the second end (end) of each fuel injection branch is connected to the atomizer, and each fuel injection branch is provided with an electronic pump, which has a low failure rate and a lifespan far exceeding that of a traditional mechanical pump structure, and can achieve the purpose of precise control and automatic control. For example, Figure 1 As shown, an electronic pump 1 is provided in the oil injection branch 1. One end of the electronic pump 1 is connected to the boost unit 120, and the other end is connected to the atomizer 1. The other end of the atomizer 1 is connected to the lubrication point corresponding to the mold. The oil is atomized by compressed air in the atomizer 1 to form a stable oil mist, which is transmitted to the lubrication point corresponding to the mold to lubricate an area corresponding to the lubrication point. Multiple electronic pumps are provided on the multi-way oil injection branch (oil injection branch 1, oil injection branch 2...oil injection branch n). Multiple electronic pumps (electronic pump 1, electronic pump 2,..., electronic pump n) are connected to multiple atomizers (atomizer 1, atomizer 2,..., atomizer n). The atomizers correspond to the lubrication points on multiple molds, thus achieving lubrication of the entire mold. On the one hand, this improves the service life of the mold, on the other hand, it improves the quality of the product, and on the other hand, it reduces the cost of oil usage.

[0031] The control unit 140 can output a first control signal to the oil supply unit 110, a second control signal to the boost unit 120, and a third control signal to the oil injection unit 130. Based on the first control signal, the control unit 140 controls all of the m parallel oil tanks or mn oil tanks to be connected to the oil input port of the boost unit 120 at the same time, thereby allowing different types of oil to enter the boost unit 120 and all of them to supply oil to the boost unit 120, thereby achieving control of the oil supply mode. When the oil in all the oil tanks is the same, oil is supplied to the boost unit 120 at the same time to meet the oil volume requirement. When some of the oil tanks store different oils, different oil tanks can supply oil to the boost unit 120 separately, and the oil tanks supplying the boost unit 120 store the same oil, thereby achieving multiple oil supply modes. While meeting lubrication requirements, it can also save oil. Of course, in other embodiments, when the oil can be mixed, the control unit 140 controls multiple oil tanks with mixable oil to supply oil to the boosting unit 120 at the same time according to the oil quantity demand, thereby increasing the oil supply mode and also being able to meet the oil quantity demand.

[0032] The control unit 140 controls the oil pressure at the input end of the oil injection unit 130 to a preset pressure via a second control signal to prevent excessive oil pressure from being output to the lubrication points on the mold, causing environmental pollution and oil waste. The control unit 140 controls the opening frequency of the electronic pump in the corresponding oil injection branch in the oil injection unit 130 via a third control signal to control the output oil volume from the second end of the corresponding oil injection branch. Optionally, the flow rate level of the electronic pump in the corresponding oil injection branch in the oil injection unit 130 can also be controlled based on the third control signal, thereby controlling the output oil volume from the second end of the corresponding oil injection branch and achieving high-precision independent adjustment of each oil injection branch. The frequency refers to the number of times the pump pumps in one second. A frequency setting of 10 means that each pump operates 10 times per second. By setting this parameter, the number of times the electronic pump pumps oil per unit time can be controlled, i.e., the greater the frequency, the greater the oil volume. The flow rate level refers to the time the electronic pump is connected once. When set to 1, it is 1ms and the maximum is 3ms. This parameter also changes the amount of oil pumped per unit time. When the frequency is constant, the larger the level, the greater the oil volume.

[0033] The micro-lubrication oil supply device provided in the embodiment of the present invention independently controls the multiple parallel-connected oil injection branches in the oil supply unit, the boost unit, and the oil injection unit through a control unit, thereby realizing a fine-tuning mode in which the oil quantities of multiple channels are independently controllable, providing accurate oil quantities to the lubrication points, and avoiding the problem that the oil mist concentration of each channel in the original oil supply system cannot be independently regulated. This avoids the waste caused by excess oil adhering to the workpiece, and avoids the excess oil mist from floating in the air and polluting the workshop environment. It also reduces the additional waste caused by the low oil control accuracy and unstable oil supply of traditional mechanical oil supply pumps. The oil and gas mixed concentration of each channel is controllable, and the oil supply does not change with the size of the air flow resistance inside the pipeline, but is only controlled by the unit oil supply of the electronic pump. The oil and gas quantities are adjusted independently without interfering with each other, realizing a high-precision independent adjustment mode. Each lubrication point can get what it needs, so that the system reaches the most reasonable oil distribution structure. At the same time, the oil supply unit has m parallel oil tanks, and all the oil tanks or mn oil tanks supply oil to the booster unit at the same time, where m≥2, 1≤n≤m-1, so that manual or automatic switching options of various oil cooling solutions can be provided, which can meet different production needs, realize multiple uses of one machine, and normalize the system in terms of control and adjustment, thereby achieving a more environmentally friendly and lower processing cost effect.

[0034] Figure 2 This is a schematic diagram of another micro-lubrication oil supply device provided by the embodiment of the utility model, referring to Figure 2 The oil supply unit includes two parallel oil tanks, that is, m=2, and the two parallel oil tanks include a first oil tank 111 and a second oil tank 112. The first oil tank 111 and the second oil tank 112 are used to store different oils.

[0035] Specifically, different types of oil are stored in the first oil tank 111 and the second oil tank 112. In the same time period, only the oil in one of the first oil tank 111 and the second oil tank 112 is supplied to the outside, so as to avoid mixing of the oil in the first oil tank 111 and the second oil tank 112. In this way, the supply of different types of oil can be achieved while saving pipeline costs, thereby providing a variety of oil lubrication solutions.

[0036] like Figure 2 As shown, optionally, the boosting unit 120 also includes a first boosting pump 121, a second boosting pump 122 and a driving module 12. The driving module 12 is connected to the first boosting pump 121 and the second boosting pump 122 respectively through two driving branches connected in parallel. The driving module 12 includes a compressed air source 123, a pressure regulator 124, a first starting valve N1 and a second starting valve N2 connected in sequence. The first starting valve N1 and the second starting valve N2 are respectively arranged on the two driving branches.

[0037] The boosting unit 120 is specifically configured to control the opening and closing of the first boosting pump 121 and the second boosting pump 122 according to the second control signal sent by the control unit 140 , and adjust the preset pressure through the pressure regulator 124 .

[0038] The compressed air source 123 , the pressure regulator 124 , the first starting valve N1 , the second starting valve N2 , the first boosting pump 121 and the second boosting pump 122 are connected via an air pipeline.

[0039] Specifically, the compressed air source 123 provides compressed air, and the control unit 140 can control the start of the pressure regulator 124 to adjust the gas pressure of the compressed air by sending a second control signal to the boosting unit 120; the control unit 140 controls the opening and closing of the first starting valve N1 and the second starting valve N2 to allow the compressed air to flow into the first boosting pump 121 or the second boosting pump 122, so that the first boosting pump 121 and the second boosting pump 122 can be driven by compressed air to obtain oil of preset pressure.

[0040] The first boost pump 121 and the second boost pump 122 can be controlled to open by the control unit 140. In the same time period, only one of the first boost pump 121 and the second boost pump 122 is working and the other pump is turned off. Under the default state, the first boost pump 121 and the second boost pump 122 correspond to different types of oils, respectively, to enhance the practicality of the first boost pump 121 and the second boost pump 122 and extend the service life of the pumps. In addition, the first boost pump 121 and the second boost pump 122 can be switched for use with each other. When one pump has a problem, the other pump can be temporarily used to replace it without delaying production. By first selecting the type of oil and then selecting the corresponding pump to open, the control unit 140 controls them separately. If there is an abnormality later, the sensor signal is fed back to the control unit 140 for further operation.

[0041] In addition, the first booster pump 121 and the second booster pump 122 can be driven by compressed air to obtain oil of preset pressure and output it to one end of each injection branch. The control unit 140 controls the opening time and opening frequency of different electronic pumps to realize the supply of quantitative oil (0-5000ml / h). The oil volume is controlled by repeated switching. The quantitative oil then passes through the atomizer and is atomized by compressed air to form a stable oil mist, which is transmitted to the corresponding lubrication point of the mold to lubricate an area corresponding to the lubrication point. Multiple electronic pumps correspond to lubrication points on multiple molds, thus realizing lubrication of the entire mold. On the one hand, it improves the service life of the mold, on the other hand, it improves the quality of the product, and on the other hand, it reduces the cost of using oil.

[0042] It should be noted that, in other embodiments, the number of boost pumps in the boost unit 120 is consistent with the number of oil types, thereby ensuring that one type of oil only needs to pass through one type of boost pump, avoiding excessive cross-mixing of oils, which may cause damage to the boost pump.

[0043] Optionally, the boosting unit 120 further includes two boosting branches respectively connected to the first boosting pump 121 and the second boosting pump 122 , the two boosting branches are respectively provided with a first one-way valve A1 and a second one-way valve A2 , and the two boosting branches are connected to the fuel injection unit 130 after being combined.

[0044] Specifically, the input end of the first one-way valve A1 is connected to the output end of the first boosting pump 121, and the input end of the second one-way valve A2 is connected to the output end of the second boosting pump 122. The output ends of the first one-way valve A1 and the second one-way valve A2 both serve as the oil output ends of the boosting unit 120. The provision of the first one-way valve A1 and the second one-way valve A2 prevents oil from flowing back into the first and second boosting pumps 121 and 122.

[0045] Optionally, an air source filter 125 is further provided between the compressed air source 123 and the pressure regulator 124 .

[0046] Specifically, one end of the air source filter 125 is connected to the output end of the compressed air source 123, and the other end of the air source filter 123 is connected to the first end of the pressure regulator 124. The air source filter 125 can filter the compressed air in the compressed air source 123 to prevent impurities in the air from contaminating the oil in the first booster pump 121 and the second booster pump 122.

[0047] Optionally, the first oil tank 111 is used to store conventional lubricating oil, and the second oil tank 112 is used to store water-based stamping oil.

[0048] Specifically, the first boost pump 121 corresponds to the first oil tank 111 and can boost the conventional lubricating oil, and the second boost pump 122 corresponds to the second oil tank 112 and can boost the water-based stamping oil. The control unit 140 is provided with a certain association program, such as the conventional lubricating oil is associated with the first boost pump 121, and the water-based stamping oil is associated with another gas-liquid boost pump. If necessary, it can be manually changed on the control panel connected to the control unit 140, and then the association relationship between the corresponding oil and the boost pump can be mobilized so that the oil can be input into the electronic pump. The first boost pump 121 and the second boost pump 122 can be driven by compressed air to obtain oil with a higher pressure. Optionally, the oil pressure output by the first boost pump 121 and the second boost pump 122 is a preset pressure, which can be adjusted by the pressure regulator 124. Therefore, according to the requirements of the actual working conditions, the pressure of the driving gas is adjusted to obtain the oil of the required preset pressure. In addition, by providing two oil tanks, two oil selection modes can be realized, which can be switched manually as needed, avoiding the waste of excess oil adhering to the workpiece and avoiding excess oil mist floating in the air to pollute the workshop environment.

[0049] It should be noted that the oil stored in the first oil tank 111 and the second oil tank 112 is not limited to the above two types, and can be selected according to actual production needs.

[0050] It should be noted that communication can be established between the electronic pump and the control unit 140 via electronic pulses. The control unit 140 can be a programmable logic controller (PLC). The electronic pump continuously receives electronic pulse signals sent by the PLC and switches the valves in the electronic pump based on the received signals. The electronic pump has a faster response speed than a high-speed solenoid valve. If the response speed of the electronic pump is 1 millisecond, then this electronic pump can divide 1 second into 1000 parts for control. Ordinary high-speed solenoid valves cannot reach this response speed. Therefore, the electronic pump can improve the reaction speed and spraying efficiency. In addition, the electronic pump adopts an original and customized electronic pump oil supply system, which has a wide oil volume adjustment range and strong versatility.

[0051] For further reference, Figure 2The oil supply unit 110 also includes two oil supply branches connected to the first oil tank 111 and the second oil tank 112 respectively, one of which is provided with a first filter 113 and a first switching valve M1, and the other is provided with a second filter 114 and a second switching valve M2. The first filter 113 and the second filter 114 are respectively connected to the oil tanks on the two oil supply branches, and the two oil supply branches are connected to the boosting unit 120 after being combined; the oil supply unit 110 is specifically used to control the opening and closing of the first switching valve M1 and the second switching valve M2 according to the first control signal sent by the control unit 140, so that one of the first oil tank 111 and the second oil tank 112 is connected to the boosting unit 120.

[0052] Specifically, the first end of the first filter 113 is connected to the outlet end of the first oil tank 111, the first end of the second filter 114 is connected to the outlet end of the second oil tank 112, the first end of the first switching valve M1 is connected to the second end of the first filter 113, and the first end of the second switching valve M2 is connected to the second end of the second filter 114. The second end of the first switching valve 113 and the second end of the second switching valve 114 can both serve as the oil output end of the oil supply unit 110.

[0053] The oil in the first oil tank 111 is filtered through the first filter 113, and the oil in the second oil tank 112 is filtered through the second filter 114. The control unit 140 controls the opening and closing of the first switching valve M1 and the second switching valve M2, so that one of the first oil tank 111 and the second oil tank 112 is connected to the oil input end of the boosting unit 120, so that the oil in the first oil tank 111 or the second oil tank 112 is delivered to the boosting unit 120. For example, when conventional lubricating oil is selected, the first switching valve M1 is opened and the second switching valve M2 connected to the second oil tank 112 where the water-based stamping oil is located is closed; when water-based stamping oil is selected, the second switching valve M2 is opened and the first switching valve M1 for conventional lubricating oil is closed; when the operation is stopped, the first switching valve M1 for conventional lubricating oil and the second switching valve M2 for water-based stamping oil are closed. Optionally, a circulation pump is installed in the second oil tank 112 to keep the water-based stamping oil in the second oil tank 112 in a circulating flow state to prevent oil sedimentation.

[0054] Furthermore, the first oil tank 111 and the second oil tank 112 are provided with a liquid level detector, a refueling port and an oil drain port.

[0055] Specifically, the liquid level detectors in the first oil tank 111 and the second oil tank 112 can detect the oil height therein, and the oil filling ports and oil drain ports of the first oil tank 111 and the second oil tank 112 can be used for filling and draining oil to achieve oil replacement.

[0056] For further reference, Figure 2A pressure detection unit 150 is further provided between the boost unit and the fuel injection unit. The pressure detection unit 150 is provided at the input end of the fuel injection unit 120 and is used to detect the oil pressure at the input end of the fuel injection unit 130.

[0057] Specifically, the oil pressure at the input end of the oil injection unit 130 detected by the pressure detection unit 150 can be sent to the control unit 140 and displayed on a screen connected to the control unit 140, thereby visualizing the oil pressure and providing effective protection for stable production.

[0058] Optionally, a flow meter is provided between the boost unit 120 and the oil supply unit 110. The flow meter measures the amount of oil entering the boost unit 120 from the oil supply unit 110. This meter not only provides statistics on the total oil supply to the equipment, but also monitors whether the system's oil supply is functioning properly. If a system malfunctions and oil supply is not functioning properly, the flow meter reading will stop changing or change slowly. At this point, the system will issue an alarm and shut down for maintenance. If this is not addressed, the module will perform high-speed punching without oil, which could potentially render the mold useless and result in significant losses. Therefore, a flow meter can prevent this from happening.

[0059] The micro-lubrication oil supply device provided in the embodiment of the present invention independently controls the multiple parallel-connected oil injection branches in the oil supply unit, the boost unit, and the oil injection unit through the control unit, thereby realizing a fine-tuning mode in which the oil quantities of multiple channels are independently controllable, providing precise oil quantities to the lubrication points, avoiding the problem that the oil mist concentrations of each channel in the original oil supply system cannot be independently regulated, meeting different production needs, realizing multiple uses of one machine, and normalizing the system in terms of control and adjustment, thereby achieving a more environmentally friendly and lower processing cost effect.

[0060] The present invention also provides a minimal lubrication system. Figure 3 A schematic diagram of the structure of a minimal lubrication system provided by the embodiment of the utility model, referring to Figure 3 The minimal lubrication system includes the minimal lubrication oil supply device of any embodiment of the present invention. The end of each oil injection branch of the minimal lubrication oil supply device is connected to an atomization module with a gas inlet. The atomization module includes an atomizer, an air source, and a high-speed solenoid valve 160 between the air source and the atomizer. The atomizer is used to mix oil and air to form oil mist to lubricate the lubrication point.

[0061] Specifically, the gas inlet of the atomizer connected to the second end of each oil injection branch is connected to a high-speed solenoid valve 160. High-speed solenoid valve 160 is used to output compressed air to the atomizer, which mixes oil and air to form an oil mist for lubricating the lubricated points. One end of high-speed solenoid valve 160 is connected to the atomizer, and the other end is connected to the air source. When high-speed solenoid valve 160 is opened, it outputs compressed air to the atomizer, causing the atomizer to mix oil and air to form an oil mist for lubricating the lubricated points.

[0062] Optionally, the minimal lubrication oil supply device has 16 fine-tunable injection branches, with an oil volume control range of 20ml-5000ml / hour per branch and an adjustment accuracy of 0.005ml / per pulse. The oil supply parameters of each injection branch can be set according to the actual needs of the production site.

[0063] Optionally, the points to be lubricated may be the upper die and the lower die of the stamping equipment.

[0064] Optionally, the control unit 140 in the minimal lubrication oil supply device is located in a digital control system, and all parameters in the minimal lubrication oil supply device can be recorded and repeated, which facilitates process adjustment and optimization.

[0065] The minimal lubrication system in the embodiment of this utility model can be applied to the production process of air conditioner fins, and can also be used in other high-speed stamping equipment. It has a digital parameter setting interface and can be operated through a touch screen. It can effectively cooperate with process tracking and optimization. It is easy to operate, stable and reliable. It is a new type of equipment specially developed for the high-speed stamping production line of air conditioner fins. The minimal lubrication oil supply device can reduce working oil, reduce production oil costs, improve workshop air quality, and improve the working environment of employees. The operation process of the minimal lubrication oil supply device and air conditioner fin production equipment is as follows:

[0066] (1) Connect the air circuit and control circuit of the MQL oil supply device, connect the oil pipes of different injection branches to the corresponding atomizers, add appropriate amount of oil to the first oil tank 111 and the second oil tank 112, adjust the pressure regulator 124 to 0 pressure, power on the MQL oil supply device, and open the compressed air source 123.

[0067] (2) Set the frequency parameters and oil level parameters of each electronic pump. Click the corresponding enable button on the touch screen parameter screen to enable the corresponding electronic pump. The unenabled electronic pump will not work.

[0068] (3) Click the boost preparation button on the touch screen monitoring screen. At this time, the compressed air in the compressed air source 123 flows out, and the pressure regulator 124 is slowly increased. The compressed air flows to the boost pump through the pressure regulator 124. At this time, the oil is pressurized by the corresponding first boost pump 121 or the second boost pump 122. Observe the current pressure collected by the pressure detection unit 150 on the touch screen. When the oil pressure reaches the preset pressure (between 0.8Mpa and 1.0Mpa), lock the pressure regulator 124 to ensure the stability of the pressure after boosting.

[0069] (4) Click the touch screen to switch to the debugging page, click the corresponding electronic pump start button to start all the electronic pumps needed. At this time, the electronic pumps operate according to the parameters just set. Check whether they are working properly. The electronic pumps continue to work until the entire pipe to the atomizer outlet is filled with oil. At this time, turn off the electronic pumps and click the touch screen to display the monitoring screen. The prerequisite work is ready and wait for the start signal of the stamping equipment. Among them, the stamping equipment has an upper mold and a lower mold, and the upper mold and the lower mold are respectively provided with oil mist inlets on the left and right sides.

[0070] (5) Before the stamping machine starts the stamping action, the upper and lower molds are in the mold separation state. After the stamping action starts, the upper mold starts to move toward the lower mold. At the same time, the stamping machine can send a signal to control the high-speed solenoid valve 160. When the high-speed pulse valve signal 160 is received to control the stamping machine, the high-speed solenoid valve 160 opens, and the air source connected to the high-speed solenoid valve 160 outputs compressed air to the atomizer. At the same time, the enabled electronic pump is set to start according to the frequency set by the parameters. The electronic pump action time follows the action time of the high-speed pulse valve 160. The oil pressurized by the booster pump is delivered to the atomizer through the electronic pump. The compressed air output by the high-speed pulse valve 160 atomizes the lubricating oil delivered by the electronic pump. The atomized oil mist is delivered to each mold to lubricate the lubrication points to achieve the lubrication effect.

[0071] (6) When the upper and lower molds are about to close, the high-speed solenoid valve 160 is closed, and the high-speed solenoid valve 160 is opened at the moment the upper and lower molds are separated, and is closed until the upper and lower molds are about to close. The cycle is repeated, and the electronic pump enabled by the minimal lubrication oil supply device follows the high-speed pulse valve 160.

[0072] (7) When the stamping equipment stops working and no longer sends a signal, the electronic pump stops moving along with the high-speed solenoid valve 160 .

[0073] The micro-lubrication system of the embodiment of the utility model provides accurate oil quantity to the lubrication points through a fine-tuning mode in which the oil quantity of multiple channels can be independently controlled, thereby avoiding the problem that the oil mist concentration of each channel in the original oil supply system cannot be independently adjusted, avoiding the waste caused by excess oil adhering to the workpiece, and avoiding the excess oil mist drifting in the air to pollute the workshop environment, and reducing the additional waste caused by the low oil control accuracy and unstable oil supply of traditional mechanical oil supply pumps, thereby achieving a more environmentally friendly and lower processing cost effect.

[0074] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are readily apparent to those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the appended claims.

Claims

1. A minimal lubrication oil supply device, characterized in that: It includes a control unit and an oil supply unit, a boost unit, and an oil injection unit connected in sequence; the control unit is electrically connected to the oil supply unit, the boost unit, and the oil injection unit respectively; the oil supply unit is used to supply oil to the boost unit, and the oil flows to the oil injection unit after being boosted by the boost unit; The oil supply unit is provided with m oil tanks connected in parallel, and all oil tanks or mn oil tanks supply oil to the boosting unit at the same time, wherein m≥2, 1≤n≤m-1; The fuel injection unit comprises a plurality of fuel injection branches connected in parallel, and each fuel injection branch is equipped with an electronic pump; The control unit is configured to control the oil supply unit to output oil, the boost unit to operate, and independently control each of the electronic pumps to operate according to the same or different action parameters; The boosting unit further includes a first boosting pump, a second boosting pump and a driving module, wherein the driving module is respectively connected to the first boosting pump and the second boosting pump through two driving branches connected in parallel, and the driving module includes a compressed air source, a pressure regulator, a first starting valve and a second starting valve connected in sequence, and the first starting valve and the second starting valve are respectively provided on the two driving branches; The boosting unit is specifically configured to control the opening and closing of the first boosting pump and the second boosting pump according to a second control signal sent by the control unit, and to adjust a preset pressure through the pressure regulator.

2. The minimal lubrication oil supply device according to claim 1, characterized in that: The m is equal to 2, and the oil tank includes a first oil tank and a second oil tank connected in parallel, and the first oil tank and the second oil tank are used to store different oils.

3. The minimal lubrication oil supply device according to claim 1, characterized in that: The boost unit further includes two boost branches respectively connected to the first boost pump and the second boost pump, the two boost branches are respectively provided with a first one-way valve and a second one-way valve, and the two boost branches are connected to the fuel injection unit after being combined.

4. The minimal lubrication oil supply device according to claim 1, characterized in that: An air source filter is also provided between the compressed air source and the pressure regulator.

5. The minimal lubrication oil supply device according to claim 2, characterized in that: The oil supply unit further includes two oil supply branches connected to the first oil tank and the second oil tank, respectively. One of the oil supply branches is provided with a first filter and a first switching valve, and the other oil supply branch is provided with a second filter and a second switching valve. The first filter and the second filter are respectively connected to the oil tanks on the two oil supply branches. The two oil supply branches are connected to the boost unit after being combined. The oil supply unit is specifically used to control the opening and closing of the first switching valve and the second switching valve according to the first control signal sent by the control unit, so that one of the first oil tank and the second oil tank is connected to the boosting unit.

6. The minimal lubrication oil supply device according to claim 2, characterized in that: The first oil tank and the second oil tank are provided with a liquid level detector, a refueling port and an oil drain port.

7. The minimal lubrication oil supply device according to claim 1, characterized in that: A pressure detection unit is further provided between the boost unit and the oil injection unit.

8. The minimal lubrication oil supply device according to claim 1, characterized in that: A flow meter is further provided between the boosting unit and the oil supply unit.

9. A minimal lubrication oil supply system, characterized in that: The minimal lubrication oil supply device comprises the minimal lubrication oil supply device according to any one of claims 1 to 8, wherein the end of each of the oil injection branches is connected to an atomization module having a gas inlet, the atomization module comprises an atomizer, an air source, and a high-speed solenoid valve provided between the air source and the atomizer, and the atomizer is used to mix oil and air to form oil mist to lubricate the lubrication point.

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