Filter device applied to water circulation system of wire cutting machine and cutting fluid circulation system
By using a filter screen structure in the water circulation system of the online cutting machine, the problem of filtering flocculent and colloidal substances in the cutting fluid is solved, achieving efficient cutting fluid purification, improving production efficiency and silicon wafer quality, and reducing production costs.
Patent Information
- Application Number
- CN202520113142.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-17
AI Technical Summary
In existing wire EDM machine water circulation systems, flocculent and colloidal substances in the cutting fluid are difficult to filter effectively, leading to wire skipping, jamming, and breakage, which affects production efficiency and safety. In addition, the mesh filtration effect is poor, and frequent replacement increases costs.
Design a filter device including a tank and a built-in filter device. The filter device consists of a filter housing and a filter screen. The filter screen is placed between the liquid inlet and the liquid outlet to filter the cutting fluid. Impurities adhere to the filter screen and are prevented from entering the liquid circulation.
It effectively filters out flocculants, improves cutting quality, reduces energy consumption, simplifies operation, reduces production costs, improves production efficiency and stability, and ensures silicon wafer quality.
Smart Images
Figure CN223831874U_ABST
Abstract
Description
Technical Field
[0001] This application relates to liquid filtration technology, and more particularly to a filter device and a cutting fluid circulation system applied to the water circulation system of a wire EDM machine. Background Technology
[0002] Solar power generation technology 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, and their quality is crucial. Typically, a slicing machine is used to slice a square rod to obtain silicon wafers, which are then diced into smaller wafers using a dicing machine to manufacture crystalline silicon cells.
[0003] During the slicing process, the slicing machine uses a cutting line for cutting and sprays cutting fluid onto the cutting area for cooling and also washes away the silicon powder adhering to the cutting line, thereby reducing the amount of silicon powder adhering to the silicon surface and improving the silicon surface quality.
[0004] Taking a slicing machine as an example, the square rod is bonded to the plastic plate with adhesive. During the cutting process, diamond fragments, adhesive powder, and plastic powder on the cutting line enter the cutting fluid and then the circulation system. Furthermore, the sawn silicon powder has a small particle size and high surface energy, which reacts with water in a weakly acidic environment to produce silicic acid and polysilicic acid colloids. These substances adsorb in large quantities, forming flocculent and gel-like substances, which are usually filtered using a mesh screen. However, in actual operation, it has been found that the filtration effect is poor, and the mesh screen needs to be replaced very frequently, seriously affecting the production cycle and reducing production efficiency.
[0005] Moreover, trace amounts of flocculent and gelatinous substances are not easily detected in liquids. By the time they are detected, they have already formed clumps of flocculent substances suspended in the liquid. When these flocculent substances enter the circulation system, they can easily adhere to the cutting line, causing the cutting line to skip grooves, or even causing the cutting line to jam or break, resulting in major production accidents. This not only increases production costs but also reduces production efficiency. Summary of the Invention
[0006] To address one of the aforementioned technical deficiencies, this application provides a filter element and a cutting fluid circulation system for use in the water circulation system of a wire EDM machine.
[0007] According to a first aspect of the embodiments of this application, a filter device for use in a water circulation system of a wire cutting machine is provided, comprising: a tank and a filter device disposed within the tank; the filter device includes:
[0008] A filter housing having a liquid inlet and a liquid outlet, wherein the liquid inlet is used to be immersed in the cutting fluid;
[0009] The filter screen is installed inside the filter housing and located between the liquid inlet and the liquid outlet.
[0010] According to a second aspect of the embodiments of this application, a cutting fluid circulation system is provided, comprising: a raw fluid tank, a filter press system, and a finished product tank. The raw fluid tank is used to receive the cutting fluid discharged from the wire cutting machine, the finished product tank is used to supply cutting fluid to the wire cutting machine, and the filter press system is located between the raw fluid tank and the finished product tank. The finished product tank employs the filter element described above.
[0011] The technical solution provided in this application embodiment includes a filtration device installed inside a tank. The filtration device comprises a filter housing and a filter screen disposed within the filter housing. The filter housing has a liquid inlet and a liquid outlet, with the filter screen positioned between the liquid outlet and the liquid inlet. The liquid inlet is immersed in the cutting fluid. Liquid from the tank enters the filtration device through the liquid inlet, passes through the filter screen, and exits through the liquid outlet. Impurities in the cutting fluid cannot pass through the filter screen and adhere to it, thus filtering the cutting fluid and preventing impurities from entering the liquid circulation, thereby improving the cutting quality of the wire EDM machine. This method effectively removes precipitates / flocculations and also has advantages such as low energy consumption, environmental friendliness, and ease of operation. Attached Figure Description
[0012] 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:
[0013] Figure 1 This is a schematic diagram of the structure of the filter device provided in the embodiments of this application;
[0014] Figure 2 A perspective structural diagram of the filter device provided in the embodiments of this application;
[0015] Figure 3 This is a schematic diagram of the structure of another filter device provided in an embodiment of this application;
[0016] Figure 4 This is a structural block diagram of the cutting fluid circulation system provided in an embodiment of this application.
[0017] Figure label:
[0018] 1- Tank body;
[0019] 2-Filter device; 21-Filter housing; 211-Liquid inlet; 212-Liquid outlet; 22-Liquid pump; 23-Filter screen; 24-Float bar;
[0020] 3-Cutting fluid. Detailed Implementation
[0021] 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.
[0022] This embodiment provides a filter device for the water circulation system of a wire EDM machine. It can contain and filter the cutting fluid, which is supplied to the wire EDM machine through a liquid pipeline to cool 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.
[0023] like Figure 1 and Figure 2 As shown, the filter device provided in this embodiment includes: a tank 1 and a filter device 2, the filter device 2 being disposed inside the tank 1. The filter device 2 includes: a filter housing 21 and a filter screen 23.
[0024] The filter housing 21 has a liquid inlet and a liquid outlet, and the liquid inlet can be immersed in the cutting fluid. The filter screen 23 is disposed inside the filter housing 21 and is located between the liquid inlet and the liquid outlet.
[0025] The cutting fluid overflows into the filter element and passes through the filter screen 23. Impurities in the cutting fluid cannot pass through the filter screen 23 and adhere to it. The cutting fluid is filtered through the filter screen 23.
[0026] The technical solution provided in this embodiment includes a filtration device installed inside the tank. The filtration device comprises a filter housing and a filter screen disposed within the filter housing. The filter housing has a liquid inlet and a liquid outlet, with the filter screen positioned between the liquid outlet and the liquid inlet. The liquid inlet is immersed in the cutting fluid. The cutting fluid enters the filter housing through the liquid inlet, passes through the filter screen, and exits through the liquid outlet. Impurities cannot pass through the filter screen and adhere to it, thus filtering the cutting fluid and preventing impurities from entering the liquid circulation, thereby improving the cutting quality of the wire EDM machine. This method effectively removes precipitates / flocculations and also has advantages such as low energy consumption, environmental friendliness, and ease of operation.
[0027] The aforementioned impurities can be amorphous adhesives and crystalline precipitates remaining on the silicon wafer surface, such as resin adhesive or resin board residues, or silicon powder particles. Large amounts of these residues adsorb together to form flocculent matter.
[0028] The tank is made of stainless steel with a vulcanized rubber layer on the inner surface, which provides corrosion resistance and prevents suspended solids from adhering to the tank wall. The tank volume provided in this embodiment is approximately 38 cubic meters, and the water treatment capacity is (2-10) T / H.
[0029] The filter screen 23 is detachably installed inside the filter housing 21. When there are many impurities attached to the filter screen 23, the filter screen 23 can be removed and replaced with a new filter screen 23 to improve the filtration effect on the cutting fluid. The removed filter screen 23 can be cleaned and reused.
[0030] The filter device 2 can be fixedly installed on the inner wall of the tank, and the liquid inlet of the filter device 2 is immersed in the cutting fluid. In one embodiment, the upper edge of the filter device 2 is flush with the liquid surface to achieve liquid overflow and automatic entry into the filter device 2.
[0031] The filter device 2 is mounted on the inner wall of the tank via a fixing device. The height of the filter device 2 is adjustable, and can be adjusted according to the liquid level of the cutting fluid to ensure that the upper edge of the filter device 2 is flush with the liquid surface. Specifically, the fixing device can be a moving mechanism composed of gears and racks to adjust the height of the filter device 2; alternatively, it can be a cylinder or hydraulic cylinder. This design increases the adaptability of the filter device 2 to different liquid levels, meeting the treatment requirements of varying water volumes.
[0032] Or, such as Figure 3 As shown, the filter device 2 can also float on the liquid surface. For example, floats 24 can be used as anchors. The floats 24 are fixed to the outer surface of the filter housing 21, and the position of the floats 24 is adjusted so that the upper edge of the filter device 2 is flush with the liquid surface, and the liquid inlet is submerged in the liquid. The floats 24 can be made to float using foam, air bladders, or other methods. There are at least two floats 24, symmetrically arranged on the outer surface of the filter housing 21. In this embodiment, four floats 24 are evenly arranged on the filter device 2.
[0033] One embodiment is as follows: the filter housing 21 is cylindrical to allow the cutting fluid to flow evenly into the filter housing 21. The top of the filter housing 21 has a liquid inlet, the bottom has a liquid outlet, and the filter screen 23 is located in the middle of the filter housing 21, between the liquid inlet and the liquid outlet.
[0034] Furthermore, a liquid pump 22 can be installed inside the filter housing 21 to provide power for the cutting fluid in the tank 1 to enter the filter device 2 through the liquid inlet. When the liquid pump 22 operates, it generates negative pressure. The pressure difference inside and outside the filter device 2 causes the cutting fluid in the tank 1 to enter the filter housing 21 through the liquid inlet, pass through the filter screen 23, and exit from the liquid outlet. The cutting fluid forms an orderly flow within the filter housing 21. The liquid pump 22 is located at the bottom of the filter housing 21. When the liquid pump 22 operates, the cutting fluid in the tank 1 flows downward into the filter housing 21.
[0035] The aforementioned filter device 2 floats on the cutting fluid and can operate continuously, constantly filtering the fluid to improve liquid quality and reduce the negative impact of impurities on downstream processes. The cutting fluid enters the filter screen for slow filtration, ensuring uninterrupted filtration. After a period of time, the filter screen is removed for cleaning or replacement. When the liquid level in the tank is low, the internal negative pressure system automatically introduces the cutting fluid from the previous device into the tank; when the liquid level in the tank is high or the water treatment volume is too large, external pipelines can be connected to introduce the fluid into other tanks.
[0036] Based on the above technical solutions, this embodiment also provides a cutting fluid circulation system, including: a raw fluid tank, a filter press system, and a finished product tank. The raw fluid tank is used to receive the cutting fluid discharged from the wire EDM machine, the finished product tank is used to supply cutting fluid to the wire EDM machine, and the filter press system is located between the raw fluid tank and the finished product tank. The finished product tank is a filter device provided in any of the above-mentioned embodiments.
[0037] 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.
[0038] The cutting fluid circulation system can supply cutting fluid to multiple wire EDM machines simultaneously, achieving large-scale fluid circulation.
[0039] Based on the above technical solution, the cutting fluid circulation system further includes: a mixing tank, from which the cutting fluid discharged from the mixing tank enters the finished product tank. The mixing tank uses any of the filter components provided above.
[0040] Furthermore, a raw liquid tank is also used, located between the raw liquid pool and the filter press system; the raw liquid tank uses any of the filter components provided above.
[0041] like Figure 4 As shown, 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] The aforementioned filter device 2 can be installed in the above-mentioned raw liquid tank, mixing tank, and finished product tank to perform continuous filtration, reduce the impurity content in the cutting fluid circulating to the wire EDM machine, and reduce the impact of impurities on the wire EDM machine.
[0044] The overflow filtration structure employed in this application enables continuous filtration and purification, improving filtration efficiency. Furthermore, this application utilizes a control device to manage the system's operation, making it more stable and reliable. This improves production efficiency, reduces production costs, ensures silicon wafer quality, enhances product competitiveness, and achieves automated control, thereby increasing production stability.
[0045] The above solution can improve production efficiency, reduce production costs, improve the quality of silicon wafers cut by the slicing machine, enhance product competitiveness, and also achieve automated control, thereby improving production stability.
[0046] 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.
[0047] 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.
[0048] 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.
[0049] 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.
[0050] 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 filter element used in the water circulation system of a wire cutting machine, characterized in that, include: Tank body and filter device installed inside the tank body; The filtration device includes: A filter housing having a liquid inlet and a liquid outlet, wherein the liquid inlet is used to be immersed in the cutting fluid; The filter screen is installed inside the filter housing and located between the liquid inlet and the liquid outlet.
2. The filter element according to claim 1, characterized in that, The filter screen is detachably installed inside the filter housing.
3. The filter element according to claim 1, characterized in that, The filter device floats on the liquid via a fixation device, and the height of the filter device is adjustable so that the upper edge of the filter housing is flush with the liquid surface.
4. The filter element according to claim 1, characterized in that, The liquid inlet is located at the top of the filter housing.
5. The filter element according to claim 4, characterized in that, It also includes a liquid pump located at the bottom of the filter housing, which is used to allow the cutting fluid in the tank to enter the filter device from the liquid inlet.
6. The filter element according to claim 1, characterized in that, The filter housing is cylindrical, with a liquid inlet on its top surface and a liquid pump and liquid outlet on its bottom surface; the filter screen is located in the middle of the filter housing.
7. The filter element according to claim 3, characterized in that, The retainer is a float bar; at least two float bars are symmetrically arranged on the outer surface of the filter housing.
8. A cutting fluid circulation system, characterized in that, include: The system includes a raw fluid tank, a filter press system, and a finished product tank. The raw fluid tank is used to receive the cutting fluid discharged from the wire EDM machine, the finished product tank is used to supply cutting fluid to the wire EDM machine, and the filter press system is located between the raw fluid tank and the finished product tank. The finished product tank uses the filter element described in any one of claims 1-7.
9. The cutting fluid circulation system according to claim 8, characterized in that, Also includes: The mixing tank discharges the cutting fluid into the finished product tank; the mixing tank uses the filter element described in any one of claims 1-7.
10. The cutting fluid circulation system according to claim 8 or 9, characterized in that, Also includes: The raw liquid tank is located between the raw liquid pool and the filter press system; the raw liquid tank uses the filter element described in any one of claims 1-7.