A centralized oil supply system for multi-wire cutting of magnetic materials

Abstract

This utility model discloses a centralized oil supply system for multi-wire cutting of magnetic materials, including a four-stage sedimentation tank, an oil collection tank, an oil pump, a refrigerated dryer, a main oil supply pipeline, a return oil pipeline, and a multi-wire cutting unit. The system uses the four-stage sedimentation tank to classify and separate the cutting oil and sludge mixture. After being pumped out, the oil is sequentially transported to the multi-wire cutting unit via the refrigerated dryer and the main oil supply pipeline, achieving unified oil supply. The cutting oil flowing out of the cutting unit flows into the oil collection tank via the return oil pipeline, and then returns to the sedimentation tank through the return channel, forming a closed loop. Through centralized oil supply and recycling design, the cutting oil can be reused, reducing energy consumption, decreasing the frequency of sludge cleaning, improving cutting efficiency and environmental cleanliness, and offering advantages such as energy saving, environmental protection, and convenient maintenance.

Description

Technical Field

[0001] This utility model relates to the fields of neodymium iron boron magnet processing and cutting mud recycling, specifically to a centralized oil supply system for multi-wire cutting of magnetic materials. Background Technology

[0002] Neodymium iron boron (NdFeB) magnetic materials, as important rare-earth permanent magnet materials, are widely used in new energy vehicle drive motors, wind turbines, high-end electroacoustic equipment, and precision instruments. The processing of NdFeB magnets typically involves multiple steps, including wire cutting, grinding, and cleaning, with multi-wire cutting being a crucial step. This process utilizes diamond wire to cut the magnetic blank at high speed to obtain magnetic sheets with high dimensional accuracy and good surface flatness.

[0003] In existing technologies, multi-wire EDM machines typically require a large amount of cutting oil as a cooling and lubricating medium during processing to reduce cutting heat, minimize wire loss, and remove chips. However, the industry currently predominantly employs a single-machine independent oil supply model, where each multi-wire EDM machine is equipped with its own independent oil collection tank, oil pump, filtration system, and refrigerated dryer. This decentralized structure has the following drawbacks:

[0004] First, each piece of equipment requires its own refrigerated dryer and oil extraction system, resulting in high overall energy consumption. Assuming each refrigerated dryer has a power of approximately 1kW, if a workshop is equipped with 10 cutting machines, the total power requirement will reach 10kW, leading to energy waste and increased operating costs. When the number of machines increases to more than 50, the power consumption and cooling burden will be further aggravated.

[0005] Secondly, in the traditional decentralized oil supply mode, the cutting oil circulation path of each machine is independent, and the sludge in the cutting oil needs to be cleaned manually. This cleaning is frequent and labor-intensive, and the rare earth components in the sludge are easily lost, which is not conducive to secondary recycling and resource reuse. At the same time, the oil tank and pipeline are prone to blockage due to sludge deposition, affecting the oil circulation efficiency.

[0006] Third, the independent oil supply system for multiple devices occupies a large area, has a complex layout, and has messy pipelines, which increases the difficulty of workshop management and maintenance. Moreover, oil overflow and oil sludge splashing can easily cause on-site environmental pollution, which does not meet the requirements of clean production.

[0007] Fourth, in multi-wire cutting processes, the temperature of the cutting oil has a significant impact on cutting accuracy. However, the oil supply system of a single machine has a small oil volume and low heat capacity, which can easily lead to oil temperature fluctuations, causing thermal deformation or cutting marks on the machined surface, thereby affecting product consistency and yield. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a centralized oil supply system for multi-wire cutting of magnetic materials, which effectively overcomes the shortcomings of existing technologies.

[0009] This utility model is achieved through the following technical solution: a centralized oil supply system for multi-wire cutting of magnetic materials, including a four-stage sedimentation tank, an oil collection tank, an oil pump, a refrigerated dryer, an oil supply main pipeline, an oil return pipeline, and a multi-wire cutting unit.

[0010] The four-stage sedimentation tank is used to classify and separate the cutting oil and sludge mixture, and its oil outlet is connected to the main oil supply pipeline through the oil pump.

[0011] The main oil supply pipeline is connected in sequence to the refrigerated dryer and the multi-wire cutting machine unit, and is used to deliver the settled cutting oil to the cutting part of the multi-wire cutting machine unit.

[0012] The oil outlet of the multi-wire cutting machine is connected to the oil return pipeline, and the end of the oil return pipeline is connected to the oil collection tank for collecting the cutting oil flowing out of the multi-wire cutting machine.

[0013] The bottom of the oil collection tank is connected to the oil inlet of the four-stage sedimentation tank through a reflux channel to realize the circulation and reuse of the cutting oil.

[0014] The refrigerated dryer is located in the middle of the main oil supply line and is used to cool and dry the cutting oil delivered to the multi-wire cutting unit.

[0015] The oil pump is located at the oil outlet of the fourth-stage sedimentation tank and is used to pump the settled cutting oil to the refrigerated dryer.

[0016] The system forms a closed loop through the main oil supply pipeline and the return oil pipeline to achieve centralized recovery and cyclic supply of cutting oil.

[0017] As a preferred technical solution, the four-stage sedimentation tank includes, in sequence along the oil flow direction, a primary sedimentation tank, a secondary sedimentation tank, a tertiary sedimentation tank, and a final sedimentation tank. The primary sedimentation tank is used to settle larger particles of sludge, and the final sedimentation tank is used to output clean cutting oil.

[0018] As a preferred technical solution, the main oil supply pipeline is made of oil-resistant metal pipe or composite plastic pipe, and multiple branch oil pipes are provided on the main pipeline, each branch oil pipe being connected to the oil inlet end of one of the multi-wire cutting machines.

[0019] As a preferred technical solution, the oil collection tank is located below the multi-wire cutting unit, and a filter screen is provided at the bottom of the tank to intercept larger particles of cutting material.

[0020] As a preferred technical solution, the refrigerated dryer is equipped with a temperature sensor and an automatic control module, which is used to automatically start and stop the cooling function according to the cutting oil temperature, thereby achieving energy-saving operation.

[0021] As a preferred technical solution, the oil pump is a variable frequency controlled oil pump, which can automatically adjust the oil pumping rate according to the number of multi-wire cutting units in operation and the flow requirements to ensure stable system pressure.

[0022] As a preferred technical solution, an oil flow distribution valve is provided between the oil return pipeline and the oil collection tank to adjust the distribution ratio of the return oil volume of different cutting units.

[0023] As a preferred technical solution, a cooling water tower is also included, which is connected to the refrigerated dryer through a circulating water circuit and is used to cool the refrigerated dryer.

[0024] The beneficial effects of this utility model are: by setting up a closed-loop circulation structure of a four-stage sedimentation tank, an oil collection tank, an oil pump, a refrigerated dryer and an oil supply pipeline, this utility model can collect the cutting oil generated by the multi-wire cutting machine in a concentrated manner, and after graded sedimentation and separation, it can be sent back to each machine, realizing the automatic circulation and reuse of the oil, replacing the traditional independent oil tank system for each machine, and greatly improving the efficiency of cutting oil use.

[0025] This invention employs a centralized oil supply system. The cutting oil is naturally cooled in a four-stage sedimentation tank before being pumped into a refrigerated dryer, eliminating the need for an independent dryer for each machine. When there are a large number of multi-wire cutting machines, only one cooling tower needs to be added to the main pipeline to meet the cooling requirements of the entire system. Taking 50 machines as an example, the total power can be reduced from 50kW in the traditional solution to approximately 25kW, achieving an energy saving rate of over 50%, significantly reducing production energy consumption and realizing energy conservation and emission reduction.

[0026] This invention utilizes a staged sedimentation design, allowing cutting sludge in the oil to automatically settle to the bottom of the pre-sedimentation tank, achieving natural separation of the sludge from the cutting oil. Operators only need to periodically clean the sludge storage tank to complete sludge recovery, eliminating the need for frequent manual cleaning of the machine's oil tank. This not only reduces labor intensity but also effectively prevents the spread of oil pollution in the workshop, improving the working environment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a partial structural diagram of the location of the refrigerated dryer of this utility model;

[0030] Explanation of reference numerals in the attached figures:

[0031] 6. Four-stage sedimentation tank; 1. Oil collection tank; 5. Oil pump; 3. Refrigerated dryer; 4. Main oil supply pipeline; 8. Return oil pipeline; 2. Multi-wire cutting unit; 7. Oil inlet end. Detailed Implementation

[0032] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0033] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0034] like Figure 1 and Figure 2 As shown, in a centralized oil supply system for multi-wire cutting of magnetic materials, the overall structure includes a four-stage sedimentation tank 6, an oil collection tank 1, an oil pump 5, a refrigerated dryer 3, a main oil supply pipeline 4, a return oil pipeline 8, and a multi-wire cutting machine unit 2. The components are connected by pipes and passages to form a closed-loop oil flow system, which is used to realize the centralized supply, cooling, recovery and reuse of cutting oil during the operation of the multi-wire cutting machine.

[0035] In practical applications, the four-stage sedimentation tank 6 is located at the bottom or low level of the system to classify and separate the cutting oil and sludge mixture flowing in from the oil collection tank 1. The sedimentation tank is divided into four independent compartments along the oil flow direction: a primary sedimentation tank, a secondary sedimentation tank, a tertiary sedimentation tank, and a final sedimentation tank. These compartments are connected by partitions. The primary sedimentation tank has the largest volume and is used to settle larger particles of cutting oil and sludge. It has an inclined guide surface and a sludge discharge port at the bottom to facilitate the sludge settling to the bottom and being discharged. The secondary and tertiary sedimentation tanks are used to further settle medium and fine particulate impurities, while the final sedimentation tank outputs the basically clarified cutting oil. This graded structure design allows for step-by-step purification of the oil within the tanks, preventing particulate impurities from entering the oil pipeline.

[0036] An oil pump 5 is installed at the oil outlet of the final stage sedimentation tank. The oil suction port of the oil pump 5 is connected to the oil outlet of the final stage sedimentation tank. The oil pump 5 adopts a variable frequency control structure, which can automatically adjust the oil pumping rate according to the number of multi-wire cutting machine units 2 in operation and the total flow demand, thereby ensuring a constant system oil supply pressure. The oil pump 5 pumps the settled cutting oil to the interior of the refrigerated dryer 3 through the main oil supply pipeline 4. The main oil supply pipeline 4 is made of oil-resistant metal pipe or composite plastic pipe, which can withstand long-term oil flow erosion and pressure changes. Multiple branch oil pipes are evenly arranged on the main pipeline, and each branch oil pipe is connected to the oil inlet 7 of one multi-wire cutting machine unit 2, thereby realizing synchronous oil supply for multiple units.

[0037] The refrigerated dryer 3 is located in the middle of the main oil supply line 4 and is used to cool and dry the cutting oil delivered to the multi-wire cutting machine unit 2. The refrigerated dryer 3 is equipped with heat exchange tubes and a condenser, which can rapidly reduce the temperature and remove moisture as the oil flows through it, thereby maintaining the stable performance of the cutting oil. An external temperature sensor and automatic control module are installed on the refrigerated dryer 3. This module monitors the oil temperature in real time. When the oil temperature exceeds a preset threshold, the cooling function is automatically activated; when the oil temperature returns to the normal range, the operation is automatically stopped to achieve energy-saving control. For workshops with a large number of devices, a cooling tower can be added to the system to further improve heat dissipation efficiency. The cooling tower is connected to the refrigerated dryer 3 through a circulating water circuit, utilizing the heat exchange effect of external cooling water to continuously cool the refrigerated dryer 3, ensuring a constant oil temperature during long-term operation.

[0038] The cooled and dried cutting oil is delivered to the cutting areas of each multi-wire cutting machine unit 2 via branch pipes of the main oil supply line 4. During multi-wire cutting, the diamond cutting wires come into contact with the magnetic material blank, and the cutting oil plays a role in lubrication, cooling, and chip removal. Due to the circulating flow of the cutting oil, the oil is heated in the cutting zone and mixes with a large number of chip particles. After flowing out of the machine, it enters the return oil line 8 through the oil outlet.

[0039] The return oil line 8 is connected to the oil outlet of each multi-wire cutting machine unit 2, and the oil flows to the main line and then to the oil collection tank 1. The return oil line 8 is equipped with an oil flow distribution valve, which can adjust the return oil ratio according to the return oil volume of each machine to prevent excessive pressure or low flow in any line, thus maintaining system return balance. The oil collection tank 1 is located below the multi-wire cutting machine unit 2 and is used to collect the cutting oil discharged from all machines. A metal filter screen is installed at the bottom of the oil collection tank 1 to intercept large particles of cutting material and prevent them from entering the return line and causing blockage. The filter screen can be removed and cleaned periodically to ensure smooth oil flow.

[0040] The bottom of the oil collection tank 1 is equipped with a return channel, which is connected to the oil inlet 7 of the four-stage sedimentation tank 6. This allows the cutting oil to naturally flow back to the sedimentation tank under gravity, achieving oil recycling. After multi-stage sedimentation and filtration, the magnetic sludge settled at the bottom of the tank can be periodically discharged from the sludge outlet and collected and reused in an external sludge storage tank. Since the NdFeB cutting sludge contains rare earth elements, this design helps to achieve raw material recovery and reduce resource waste.

[0041] The entire system forms a closed-loop structure through the main oil supply line 4 and the return oil line 8. After purification in the four-stage sedimentation tank 6, the cutting oil is extracted by the oil pump 5, cooled and dehydrated by the refrigerated dryer 3, and then distributed to each multi-wire cutting unit 2. Oil mixed with cutting chips after cutting flows back into the oil collection tank 1 through the return oil line 8, and finally returns to the sedimentation tank for continued recycling. During operation, the system can monitor and adjust the oil flow rate, temperature, and pump speed in real time via a PLC control unit to ensure the multi-wire cutting machine operates continuously and stably under optimal lubrication and cooling conditions.

[0042] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A centralized oil supply system for multi-wire cutting of magnetic materials, characterized in that: It includes a four-stage sedimentation tank (6), an oil collection tank (1), an oil pump (5), a refrigerated dryer (3), an oil supply main pipeline (4), an oil return pipeline (8), and a multi-wire cutting unit (2); The four-stage sedimentation tank (6) is used to classify and separate the cutting oil and sludge mixture. Its oil outlet is connected to the main oil supply pipeline (4) through the oil pump (5). The main oil supply pipeline (4) is connected in sequence to the refrigerated dryer (3) and the multi-wire cutting machine (2), and is used to transport the settled cutting oil to the cutting part of the multi-wire cutting machine (2); The oil outlet of the multi-wire cutting machine (2) is connected to the oil return pipeline (8), and the end of the oil return pipeline (8) is connected to the oil collection tank (1) to collect the cutting oil flowing out of the multi-wire cutting machine. The bottom of the oil collection tank (1) is connected to the oil inlet (7) of the fourth-stage sedimentation tank (6) through a return channel to realize the circulation and reuse of the cutting oil; The refrigerated dryer (3) is located in the middle of the main oil supply pipeline (4) and is used to cool and dry the cutting oil delivered to the multi-wire cutting machine unit (2). The oil pump (5) is located at the oil outlet of the fourth-stage sedimentation tank (6) and is used to pump the settled cutting oil to the refrigerated dryer (3). The system forms a closed loop through the main oil supply pipeline (4) and the return oil pipeline (8) to achieve centralized recovery and cyclic supply of cutting oil.

2. The centralized oil supply system for multi-wire cutting of magnetic materials according to claim 1, characterized in that: The four-stage sedimentation tank (6) includes a primary sedimentation tank, a secondary sedimentation tank, a tertiary sedimentation tank and a final sedimentation tank in sequence along the oil flow direction. The primary sedimentation tank is used to settle large particles of sludge, and the final sedimentation tank is used to output clean cutting oil.

3. The centralized oil supply system for multi-wire cutting of magnetic materials according to claim 1, characterized in that: The main oil supply pipeline (4) is made of oil-resistant metal pipe or composite plastic pipe, and has multiple branch oil pipes on the main line. Each branch oil pipe is connected to the oil inlet (7) of a multi-wire cutting machine unit (2).

4. The centralized oil supply system for multi-wire cutting of magnetic materials according to claim 1, characterized in that: The oil collection tank (1) is located below the multi-wire cutting unit (2), and a filter screen is provided at the bottom of the tank to intercept large particles of cutting material.

5. The centralized oil supply system for multi-wire cutting of magnetic materials according to claim 1, characterized in that: The refrigerated dryer (3) is equipped with a temperature sensor and an automatic control module, which is used to automatically start and stop the cooling function according to the cutting oil temperature, thereby achieving energy-saving operation.

6. The centralized oil supply system for multi-wire cutting of magnetic materials according to claim 1, characterized in that: The oil pump (5) is a variable frequency controlled oil pump, which can automatically adjust the oil pumping rate according to the number of multi-wire cutting units (2) in operation and the flow requirements to ensure stable system pressure.

7. The centralized oil supply system for multi-wire cutting of magnetic materials according to claim 1, characterized in that: An oil flow distribution valve is provided between the oil return pipeline (8) and the oil collection tank (1) to adjust the distribution ratio of the return oil volume of different cutting units.

8. The centralized oil supply system for multi-wire cutting of magnetic materials according to claim 1, characterized in that: It also includes a cooling water tower, which is connected to the refrigerated dryer (3) through a circulating water circuit and is used to cool the refrigerated dryer (3).

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