Cutting fluid circulating system applied to wire cutting machine

Abstract

The embodiment of the utility model provides a water circulation system applied to a wire cutting machine. The water circulation system comprises a first stock solution ground pool, a second stock solution ground pool, a stock solution tank and an emergency tank. A first liquid inlet of the first stock solution ground pool is used for receiving cutting liquid discharged by wire cutting; the first liquid inlet is provided with a first valve; a second liquid inlet of the second stock solution ground pool is used for receiving cutting liquid discharged by wire cutting, and a second valve is arranged at the second liquid inlet; a stock solution tank and an emergency tank are arranged at the rear end of a first liquid outlet of the first stock solution ground pool; a stock solution tank and an emergency tank are arranged at the rear end of a second liquid outlet of the second stock solution ground pool. According to the cutting fluid circulating system applied to the wire cutting machine, when indexes such as acidity and alkalinity of waste cutting fluid discharged by the wire cutting machine are abnormal, the waste cutting fluid enters the second stock solution ground pool and then enters the emergency tank to be temporarily stored, corresponding treatment is carried out, and the working efficiency is improved. And the cutting liquid which does not meet the requirement is prevented from entering normal circulation through the stock solution tank to influence the operation of the wire cutting machine.

Description

Technical Field

[0001] This application relates to cooling technology for wire EDM machines, and more particularly to a cutting fluid circulation system for wire EDM machines. Background Technology

[0002] Solar energy is an inexhaustible and clean renewable energy source for humankind. Solar photovoltaic power generation is one of the fastest-growing and most dynamic research fields in recent years. Crystalline silicon cells are one of the important components of solar panels, so the quality of crystalline silicon cells is crucial. Typically, a slicing machine is used to slice a square rod to obtain silicon wafers, and then a dicing machine is used to dice the silicon wafers into smaller pieces, which are then used to manufacture crystalline silicon cells.

[0003] Slicing machines utilize cutting wires for cutting and spray cutting fluid onto the cutting area for cooling and to wash away silicon powder adhering to the cutting wires, thus reducing silicon powder on the silicon surface and improving surface quality. Changes in the composition, content, acidity, and alkalinity of the cutting fluid will affect its quality. For example, if the acidity or alkalinity of the cutting fluid changes, a large amount of acid or alkali needs to be added for neutralization, increasing production costs and altering the conductivity of the cutting fluid, thereby reducing silicon wafer quality and potentially causing production accidents. Summary of the Invention

[0004] To address one of the aforementioned technical deficiencies, this application provides a cutting fluid circulation system for wire EDM machines.

[0005] According to a first aspect of the embodiments of this application, a cutting fluid circulation system for a wire EDM machine is provided, comprising: a first raw fluid pool, a second raw fluid pool, a raw fluid tank, and an emergency tank;

[0006] The first liquid inlet of the first raw liquid tank is used to receive the cutting fluid discharged from the wire cutting machine; the first liquid inlet is equipped with a first valve; the second liquid inlet of the second raw liquid tank is used to receive the cutting fluid discharged from the wire cutting machine; the second liquid inlet is equipped with a second valve.

[0007] A raw material tank and an emergency tank are installed at the rear end of the first liquid outlet of the first raw material pool; a raw material tank and an emergency tank are installed at the rear end of the second liquid outlet of the second raw material pool.

[0008] The technical solution provided in this application embodiment includes a first liquid inlet of a first raw material pool for receiving cutting fluid discharged from wire cutting; the first liquid inlet is equipped with a first valve; a second liquid inlet of a second raw material pool for receiving cutting fluid discharged from wire cutting, the second liquid inlet is equipped with a second valve; a raw material tank and an emergency tank are provided at the rear end of the first liquid outlet of the first raw material pool; a raw material tank and an emergency tank are provided at the rear end of the second liquid outlet of the second raw material pool. When the acidity, alkalinity, or other indicators of the waste cutting fluid discharged from the wire cutting machine are abnormal, the fluid enters the second raw material pool and then enters the emergency tank for temporary storage and appropriate treatment, preventing the non-compliant cutting fluid from entering the normal circulation through the raw material tank and affecting the operation of the wire cutting machine. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0010] Figure 1 A schematic diagram of the cutting fluid circulation system provided in the embodiments of this application. Figure 1 ;

[0011] Figure 2 A schematic diagram of the cutting fluid circulation system provided in the embodiments of this application. Figure 2 .

[0012] Figure label:

[0013] 1-First raw material tank; 2-Second raw material tank; 3-Raw material tank; 4-Emergency tank;

[0014] 51-First valve; 52-Second valve; 53-Third valve; 54-Fourth valve; 55-Fifth valve;

[0015] 6-pH detection device. Detailed Implementation

[0016] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0017] This embodiment provides a cutting fluid circulation system for a wire EDM machine, which provides a circulating cutting fluid to the machine and cools the cutting area during operation. The wire EDM machine can be a squaring machine or a slicing machine; this embodiment uses a slicing machine as an example.

[0018] like Figure 1 As shown, the cutting fluid circulation system provided in this embodiment includes: a first raw fluid pool 1, a second raw fluid pool 2, a raw fluid tank 3, and an emergency tank 4.

[0019] The first raw material pool 1 has a first liquid inlet and a first liquid outlet. The first liquid inlet is equipped with a first valve 51. The first liquid inlet is used to receive the cutting fluid discharged from the wire EDM machine. It can be connected to the cutting fluid discharge pipeline of the wire EDM machine or to the workshop wastewater pipeline. The workshop wastewater pipeline is connected to multiple wire EDM machines, and the cutting fluid discharged from the wire EDM machines is collected in the workshop wastewater pipeline. When the first valve 51 is opened, the waste cutting fluid enters the first raw material pool 1 through the first liquid inlet. The downstream end of the first liquid outlet is equipped with a raw material tank 3 and an emergency tank 4. The waste cutting fluid undergoes preliminary sedimentation and filtration in the first raw material pool 1 before entering the raw material tank 3 or the emergency tank 4.

[0020] The second raw material tank 2 has a second liquid inlet and a second liquid outlet. The second liquid inlet is equipped with a second valve 52. The second liquid inlet is used to receive the cutting fluid discharged from the wire EDM machine and can be connected to the cutting fluid discharge pipeline of the wire EDM machine or to the workshop wastewater pipeline. When the second valve 52 is opened, the waste cutting fluid enters the second raw material tank 2 through the second liquid inlet. A raw material tank 3 and an emergency tank 4 are set at the rear end of the second liquid outlet. The waste cutting fluid undergoes preliminary sedimentation and filtration in the second raw material tank 2 before entering the raw material tank 3 or the emergency tank 4.

[0021] When the acidity and alkalinity of the waste cutting fluid discharged from the wire EDM machine are normal, the first valve 51 can be opened to allow the waste cutting fluid to enter the first raw material pool 1 for preliminary sedimentation and filtration, then enter the raw material tank 3 for normal circulation, and finally return to the wire EDM machine for reuse. When the acidity and alkalinity of the waste cutting fluid discharged from the wire EDM machine are abnormal, the first valve 51 is closed to prevent the waste cutting fluid from entering the first raw material pool 1. Instead, the second valve 52 is opened to allow the waste cutting fluid to enter the second raw material pool 2, and then enter the emergency tank 4 for temporary storage and appropriate treatment, such as adding acid or alkali to adjust the acidity and alkalinity. After the indicators return to normal, it re-enters the normal circulation. If the cutting fluid in the emergency tank 4 is indeed unusable, it is discharged as industrial wastewater after environmental treatment.

[0022] When the waste cutting fluid enters the second raw material pool 2 in an emergency, the cutting fluid in the original first raw material pool 1, after its test indicators return to normal, can still circulate normally and supply the wire cutting machine, thus not affecting normal production. Once the acidity, alkalinity, and other indicators of the waste cutting fluid discharged from the wire cutting machine are normal, the first valve 51 is reopened, allowing the cutting fluid to circulate through the first raw material pool 1.

[0023] The technical solution provided in this embodiment includes a first liquid inlet in the first raw material pool for receiving the cutting fluid discharged from the wire cutting machine; the first liquid inlet is equipped with a first valve; a second liquid inlet in the second raw material pool for receiving the cutting fluid discharged from the wire cutting machine, the second liquid inlet is equipped with a second valve; a raw material tank and an emergency tank are provided at the rear end of the first liquid outlet of the first raw material pool; a raw material tank and an emergency tank are provided at the rear end of the second liquid outlet of the second raw material pool. When the acidity, alkalinity, or other indicators of the waste cutting fluid discharged from the wire cutting machine are abnormal, the fluid enters the second raw material pool and then enters the emergency tank for temporary storage and appropriate treatment, preventing the non-compliant cutting fluid from entering the normal circulation through the raw material tank and affecting the operation of the wire cutting machine.

[0024] Based on the above technical solution, this embodiment also provides an implementation method: a valve group is installed between the first raw liquid tank 1, the second raw liquid tank 2, the raw liquid tank 3, and the emergency tank 4. The first raw liquid tank 1 is connected to the raw liquid tank 3 and the emergency tank 4 respectively through the valve group; the second raw liquid tank 2 is connected to the raw liquid tank 3 and the emergency tank 4 respectively through the valve group.

[0025] By controlling the opening and closing of the valve assembly, when the acidity, alkalinity, and other indicators of the waste cutting fluid discharged from the wire EDM machine are normal, the first valve 51 can be opened to allow the waste cutting fluid to enter the first raw material tank 1 for preliminary sedimentation and filtration. Additionally, the second valve 52 can be opened to allow the waste cutting fluid to enter the second raw material tank 2 for preliminary sedimentation and filtration. The cutting fluid in both the first raw material tank 1 and the second raw material tank 2 enters the raw material tank 3 for normal circulation, which increases the circulation rate of the cutting fluid, enabling the cutting fluid circulation system to simultaneously meet the needs of multiple wire EDM machines operating at the same time.

[0026] By controlling the opening and closing of the valve group, when the acidity, alkalinity, or other indicators of the waste cutting fluid discharged from the wire cutting machine are abnormal, the first valve 51 and the second valve 52 can be opened to allow the waste cutting fluid to simultaneously enter the first raw liquid tank 1 and the second raw liquid tank 2, and then both enter the emergency tank 4 for treatment. This can improve the capacity of the cutting fluid, so that the cutting fluid circulation system can meet the needs of multiple wire cutting machines working at the same time.

[0027] One embodiment: The valve assembly includes a third valve 53, a fourth valve 54, and a fifth valve 55; the third valve 53, the fifth valve 55, and the fourth valve 54 are arranged sequentially and are installed on the pipeline between the raw material tank 3 and the emergency tank 4. The first liquid outlet of the first raw material tank 1 is connected to the pipeline between the third valve 53 and the fifth valve 55, and the second liquid outlet of the second raw material tank 2 is connected to the pipeline between the third valve 53 and the fourth valve 54.

[0028] Open the fifth valve 55 to allow the cutting fluid in the first raw material pool 1 to enter the raw material tank 3. Open the fourth valve 54 to allow the cutting fluid in the second raw material pool 2 to enter the emergency tank 4.

[0029] Close the fifth valve 55, and open the third valve 53 and the fourth valve 54 to allow the cutting fluid with abnormal indicators in the first raw fluid pool 1 and the second raw fluid pool 2 to enter the emergency tank 4. Close the fourth valve 54, and open the third valve 53 and the fifth valve 55 to allow the cutting fluid with normal indicators in the first raw fluid pool 1 and the second raw fluid pool 2 to enter the raw fluid tank 3.

[0030] The capacity of the first raw material pool 1 is greater than the capacity of the second raw material pool 2. Abnormal cutting fluid parameters are a low-probability event, so the larger capacity of the first raw material pool 1 is sufficient to hold the cutting fluid with normal parameters. Even if the capacity is insufficient, the second raw material pool 2 can temporarily handle the situation.

[0031] Silica powder reacts violently with alkalis. On one hand, the pressure filtration process causes temperature increases, potentially leading to spontaneous combustion and safety accidents, and the resulting silica sludge poses a significant safety risk. On the other hand, the released hydrogen gas presents a major safety hazard to the working environment. If acid is used for neutralization, the silicic acid and polysilicic acid generated from the silica powder reaction will precipitate in the water, causing water quality deterioration. Therefore, it is crucial to control alkali leakage during the drainage process to prevent safety issues and impacts on production efficiency. Strict management of the drainage system is essential to control the amount of contaminated water, implement online isolation and treatment, eliminate safety hazards, and ensure uninterrupted production.

[0032] Furthermore, a pH detection device 6 is installed in the cutting fluid discharge pipeline to detect the pH value of the cutting fluid. A conductivity detection device can also be installed in the cutting fluid discharge pipeline to detect the conductivity of the cutting fluid, assisting in the detection of cutting fluid parameters and ensuring that the acidity or alkalinity of the cutting fluid meets the requirements, thereby eliminating safety hazards and ensuring uninterrupted production.

[0033] The solution provided in this embodiment features an AB dual-pool structure (first raw liquid pool 1 and second raw liquid pool 2) in the large circulating pool. Online pH and conductivity detectors are set at the remote end of the water path. Abnormal signals are associated with the gates of the AB pools, which isolates abnormal water to the smaller pool while the larger pool is used normally. This allows for accurate monitoring of some abnormalities and greatly reduces production costs.

[0034] At least one of the first valve 51 and the second valve 52 is a pneumatic valve, and at least one of the third valve 53, the fourth valve 54, and the fifth valve 55 is a manual valve. When the cutting fluid parameters are normal, the first valve 51 and the second valve 52 can be automatically controlled to open, and each water tank can start and stop according to the water level in the tank, supplying the cutting fluid to the raw water tank in the large circulation workshop to meet the needs of automated production.

[0035] When the cutting fluid parameters are abnormal, such as abnormal pH or conductivity, the system automatically closes the first valve 51 and the second valve 52, and issues an audible and visual alarm. After on-site inspection and confirmation by the operator, several of the following valves can be manually opened to discharge the cutting fluid to the main circulating water tank or emergency tank: the first valve 51, the second valve 52, the third valve 53, the fourth valve 54, and the fifth valve 55. In the event of alkali leakage, production can continue without interruption. Both abnormal and normal cutting fluid are handled simultaneously, improving production efficiency and implementing online isolation to prevent safety issues.

[0036] Liquid pumps are installed in the aforementioned pools and tanks, or between pools and tanks. The operation of the liquid pumps is based on the liquid level; the liquid pumps start when the liquid level is low and stop when the liquid level is high. The start and stop of the liquid pumps are controlled by the liquid level of the main circulation tank; the pumps start when the liquid level in the tank is low and stop when the liquid level is high. The start and stop control of the water pumps is provided by the manufacturer of the main circulation system.

[0037] Based on the above technical solutions, such as Figure 2 As shown, this embodiment also provides an implementation of a cutting fluid circulation system, which further includes a mixing tank and a finished product tank, which are sequentially arranged at the rear end of the raw fluid tank. Figure 2 The diagram only shows one raw material pool, but it actually includes the first raw material pool 1 and the second raw material pool 2 mentioned above.

[0038] It also includes a pressure filtration system, located between the raw liquid tank and the mixing tank.

[0039] The cutting fluid circulation system supplies cutting fluid to the wire EDM machine, cooling and rinsing it. The cutting fluid discharged from the wire EDM machine enters a raw fluid tank for initial filtration and sedimentation. The upper layer of liquid in the raw fluid tank enters a pressure filtration system for further filtration. The filtered liquid enters a finished product tank, which uses the aforementioned cutting fluid container for a second filtration to remove resin residue. The liquid in the finished product tank is then supplied to the wire EDM machine for reuse.

[0040] The cutting fluid circulation system can supply cutting fluid to multiple wire EDM machines simultaneously, achieving large-scale fluid circulation.

[0041] Assuming the wire EDM machine is a slicing machine, one implementation of the cutting fluid circulation system includes a raw fluid pool, a raw fluid tank, a filter press system, a mixing tank, a finished product tank, and a sedimentation filter tank. The cutting waste fluid from the slicing machine enters the raw fluid pool for preliminary filtration. If the raw fluid pool contains a large amount of impurities, it first enters the raw fluid tank for filtration, then enters the filter press system for further filtration before entering the mixing tank, or it can directly enter the mixing tank. If the raw fluid pool contains few impurities, it directly enters the mixing tank. The liquid in the mixing tank enters the finished product tank, then passes through the sedimentation filter tank before returning to the slicing machine, achieving liquid circulation outside the slicing machine. This scheme can simultaneously supply cutting fluid to multiple slicing machines.

[0042] The liquid in the raw material tank can be directly fed into the mixing tank, or the liquid in the raw material tank can be directly fed into the mixing tank. This can reduce the frequency of use of the filter press system, thereby reducing the frequency of replacement of the filter elements in the filter press system and reducing production costs.

[0043] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0047] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A cutting fluid circulation system for wire EDM machines, characterized in that, include: First raw material pool, second raw material pool, raw material tank, and emergency tank; The first liquid inlet of the first raw liquid tank is used to receive the cutting fluid discharged from the wire cutting machine; the first liquid inlet is equipped with a first valve; the second liquid inlet of the second raw liquid tank is used to receive the cutting fluid discharged from the wire cutting machine; the second liquid inlet is equipped with a second valve. A raw material tank and an emergency tank are installed at the rear end of the first liquid outlet of the first raw material pool; a raw material tank and an emergency tank are installed at the rear end of the second liquid outlet of the second raw material pool.

2. The cutting fluid circulation system according to claim 1, characterized in that, A valve assembly is installed between the first raw liquid tank, the second raw liquid tank, the raw liquid tank, and the emergency tank; the first raw liquid tank is connected to the raw liquid tank and the emergency tank respectively through the valve assembly; the second raw liquid tank is connected to the raw liquid tank and the emergency tank respectively through the valve assembly.

3. The cutting fluid circulation system according to claim 2, characterized in that, The valve group includes a third valve, a fourth valve, and a fifth valve; the third valve, the fifth valve, and the fourth valve are arranged sequentially and installed on the pipeline between the raw liquid tank and the emergency tank; the first liquid outlet of the first raw liquid tank is connected between the third valve and the fifth valve, and the second liquid outlet of the second raw liquid tank is connected between the third valve and the fourth valve.

4. The cutting fluid circulation system according to claim 1, characterized in that, The capacity of the first raw liquid tank is greater than the capacity of the second raw liquid tank.

5. The cutting fluid circulation system according to claim 1, characterized in that, Also includes: A pH detection device is installed in the cutting fluid discharge pipeline.

6. The cutting fluid circulation system according to claim 1, characterized in that, At least one of the first valve and the second valve is a pneumatic valve.

7. The cutting fluid circulation system according to claim 3, characterized in that, At least one of the third, fourth, and fifth valves is a manual valve.

8. The cutting fluid circulation system according to any one of claims 1-7, characterized in that, Also includes: The mixing tank and the finished product tank are arranged sequentially at the rear end of the raw liquid tank.

9. The cutting fluid circulation system according to claim 8, characterized in that, Also includes: The filter press system is located between the raw liquid tank and the mixing tank.

Images