Cutting fluid circulating system and wire cutting machine

Abstract

The utility model provides a cutting fluid circulation system and a wire cutting machine, the cutting fluid circulation system comprises a fluid supply cylinder body, the fluid supply cylinder body is provided with a fluid collection port, a fluid injection port and a fluid outlet, the fluid collection port, the fluid injection port and the fluid outlet are communicated through the fluid supply cylinder body, and the fluid injection port is used for injecting new cutting fluid when the fluid supply cylinder body works; in the cutting process, the new cutting fluid can be controllably input to dilute the content of silicon powder in the old cutting fluid; the content of silicon powder in the circulating cutting fluid is stabilized in a relatively low range, and the influence of the cutting fluid on the cutting work is reduced; in addition, the first filtering device is arranged between the liquid collecting tank and the liquid supply tank in the liquid supply cylinder body, so that the cutting liquid in the liquid collecting tank can enter the liquid supply tank through the first filtering device in an overflowing manner, and the problem of blockage caused by the fact that filtered materials are accumulated on the first filtering device is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wire cutting, in particular to a cutting liquid circulation system and a wire cutting machine. Background Art

[0002] In the field of online cutting technology, a high-speed cutting wire is used to move the parts to be cut (including but not limited to silicon rods, magnetic materials, semiconductors, sapphire, silicon carbide and other materials) relative to each other to achieve cutting. Taking the example of a slicer cutting silicon rods, during wire cutting, the silicon rods to be cut are fixed on the feed mechanism, and the silicon rods are driven by the feed mechanism to move relative to the cutting wire net to achieve slicing. During the cutting process, in order to ensure the cutting performance of the cutting wire, it is necessary to continuously spray the cutting wire net with cutting fluid, first, to cool the cutting wire, second, to disperse and rinse the silicon powder after cutting, and third, to lubricate the cutting wire net. It should be noted that the silicon powder will not be filtered out in the filter device, so as the cutting operation proceeds, the silicon powder content in the cutting fluid gradually increases. The silicon powder in the cutting fluid will reduce the lubrication and cooling effect of the cutting fluid, increase the probability of wire jump and wire breakage of the cutting wire, and thus affect the cutting quality. In the prior art, the cutting fluid circulation systems that supply fluid to the cutting wire mesh are all closed-loop operations. As the cutting process progresses, the content of silicon powder in the cutting fluid circulation system will gradually increase, thereby reducing the lubrication, cooling and flushing effects of the cutting fluid, and even aggravating the line marks on the cutting surface, increasing the probability of cutting line jumps and breaks, resulting in a decrease in cutting quality and cutting efficiency. Utility Model Content

[0003] In response to the above technical problems, the technical solution of the utility model provides a cutting fluid circulation system and a wire cutting machine, which are conducive to adjusting the silicon powder content in the cutting fluid during the cutting process, thereby reducing the probability of wire jumping and wire breaking during the cutting process, improving the cutting quality of the cutting surface, and improving the cutting efficiency.

[0004] According to the first aspect of the utility model, the utility model provides a cutting fluid circulation system, comprising a fluid supply cylinder body and a spraying device, the fluid supply cylinder body comprising a liquid collecting port, a liquid injection port and a liquid outlet, the liquid collecting port being used to collect the cutting fluid after spraying, the liquid injection port being used to inject new cutting fluid when the fluid supply cylinder body is working; the fluid supply cylinder body is connected to the spraying device through the liquid outlet, so that the cutting fluid circulates in the cutting fluid circulation system.

[0005] In a further optimization of the technical solution of the utility model, a first filtering device is provided on the liquid supply cylinder body, and the first filtering device is used to perform coarse filtering on the collected liquid.

[0006] Further optimization of the technical solution of the utility model is that the liquid supply cylinder body is divided into a liquid collecting tank and a liquid supply tank by the first filtering device, the liquid collecting tank and the liquid supply tank are interconnected by the first filtering device to filter the collected cutting fluid, and the liquid collecting port is arranged on the liquid collecting tank, and the liquid outlet and the liquid injection port are respectively arranged on the liquid supply tank.

[0007] Further optimization of the technical solution of the utility model, the first filtering device is a filtering mesh.

[0008] According to a further optimization of the technical solution of the utility model, a first liquid supply pump is arranged in the liquid supply tank, and the first liquid supply pump is connected to the liquid outlet.

[0009] A further optimization of the technical solution of the utility model further includes a liquid discharge port, which is arranged in the liquid collecting tank of the liquid supply cylinder body, and a first control valve is arranged on the liquid discharge port.

[0010] According to a further optimization of the technical solution of the utility model, branch flow meters are respectively provided on the liquid discharge port and the liquid injection port, and the branch flow meters are respectively used to detect the amount of liquid discharged and injected into the liquid supply cylinder body.

[0011] A further optimization of the technical solution of the utility model includes a second filtering device, a heat exchanger and the cutting fluid circulation system described above, wherein the liquid outlet is connected to the second filtering device, the second filtering device is connected to the spraying device through the heat exchanger, and the liquid collecting port is used to collect the cutting fluid sprayed from the spraying device.

[0012] Further optimization of the technical solution of the utility model also includes a centralized liquid supply system and a ditch, wherein the centralized liquid supply system is connected to the liquid filling port of the liquid supply cylinder body through a liquid infusion pipeline, and the ditch is connected to the liquid discharge port of the liquid supply cylinder body.

[0013] The technical solution of the utility model is further optimized, and the liquid injection port of the liquid supply cylinder body is connected to the cutting supply device.

[0014] In a further optimization of the technical solution of the utility model, the cutting liquid supply device is a centralized liquid supply system, and a second control valve is provided on the liquid infusion pipeline between the centralized liquid supply system and the liquid injection port.

[0015] According to the second aspect of the utility model, a wire cutting machine includes a base, a cutting chamber and the cutting fluid circulation system described above, wherein the spray device is arranged inside the cutting chamber, and the liquid collecting port of the liquid supply cylinder body is used to collect the cutting fluid flowing out of the cutting chamber.

[0016] According to a further optimization of the technical solution of the utility model, the liquid supply cylinder body is arranged below the cutting chamber, an opening is arranged below the cutting chamber, and the opening corresponds to the liquid collecting port of the liquid supply cylinder body.

[0017] According to a further optimization of the technical solution of the utility model, the liquid supply cylinder body is arranged outside the wire cutting machine, and a liquid infusion pipeline is arranged below the cutting chamber, and the liquid infusion pipeline is connected to the liquid collecting port.

[0018] Further optimization of the technical solution of the utility model is that the wire cutting machine is a slicer.

[0019] Compared with the prior art, the advantages of the technical solution of the utility model are:

[0020] 1. The cutting fluid circulation system of the present application is provided with a liquid injection port on the liquid supply cylinder body, so that new cutting fluid can be input during the cutting process to reduce the content of silicon powder in the old cutting fluid and reduce the impact of high silicon powder content in the cutting fluid on the cutting work.

[0021] 2. The cutting fluid circulation system of the present application is provided with a discharge port on the liquid supply cylinder body, which cooperates with the liquid filling port. During the cutting process, new cutting fluid can be injected from the outside, and the old cutting fluid containing silicon powder can be discharged at the same time, so as to achieve the purpose of regulating the silicon powder content in the circulating cutting fluid. When the injection of new cutting fluid and the discharge of old cutting fluid reach a dynamic balance, the content of silicon powder in the cutting fluid participating in the circulation can be maintained within a relatively low range, thereby ensuring the spraying effect.

[0022] 3. The wire cutting machine of the present application is provided with an opening corresponding to the liquid collecting port at the bottom of the cutting chamber or is connected to the liquid collecting port through an infusion pipeline, which is conducive to the cutting fluid after spraying directly entering the liquid collecting port of the liquid supply cylinder body, simplifies the structural layout of the cutting chamber, and reduces the production cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0024] Figure 1 It is a structural schematic diagram of the liquid supply cylinder body in the technical solution of the utility model;

[0025] Figure 2 It is a structural schematic diagram of a cutting fluid circulation system in the technical solution of the utility model.

[0026] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0027] Description of labels:

[0028] 1-liquid supply cylinder body; 11-liquid collecting port; 12-liquid outlet; 13-liquid injection port; 14-liquid discharge port; 15-liquid collecting tank; 16-liquid supply tank; 17-first filtering device; 2-second filtering device; 3-heat exchanger; 4-spraying device; 5-liquid funnel; 6-ditch; 61-reflux pipeline. DETAILED DESCRIPTION

[0029] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0031] It should also be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the product or system including the elements. In the description of the present utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0032] The following will be combined with the attached Figure 1-2 The utility model is further described.

[0033] In the field of wire cutting technology, photovoltaic silicon rods, silicon carbide, semiconductors, sapphire, magnetic materials and other materials are cut using high-speed cutting wires. Taking the cutting of silicon rods as an example, a cutting liquid circulation system is used to continuously spray cutting liquid during the cutting process to reduce the temperature of the cutting wire during cutting, and at the same time, it can wash away the powder and debris (hereinafter referred to as "silicon powder") generated by the cutting of silicon rods. However, the cutting liquid circulation systems in existing cutting equipment are all closed-loop. During the entire cutting process, the amount of cutting liquid in the cutting liquid circulation system is constant. Since silicon powder is continuously generated during the cutting process, the content of silicon powder in the cutting liquid will gradually increase, resulting in a gradual decrease in the spraying effect, especially in the second half of the cutting. It should be noted here that silicon powder will not be filtered out in the filtering device, so as the cutting operation proceeds, the content of silicon powder in the cutting liquid will gradually increase. The silicon powder in the cutting liquid will reduce the lubrication and cooling effect of the cutting liquid, increase the probability of wire jump and wire breakage of the cutting line, and thus affect the cutting quality.

[0034] In the prior art, the main solution to the above problems is to increase the volume of the liquid supply cylinder to reduce the content of silicon powder in the cutting fluid to a certain extent, thereby controlling the content of silicon powder in the cutting fluid within a certain range. However, due to the limited space of the base of the cutting equipment and the increase in the volume of the liquid supply cylinder, the cost of the equipment also increases. In order to better solve the above problems, the present application provides a new cutting fluid circulation system, that is, the structure of the liquid supply cylinder body 1 is improved. Specifically, the cutting fluid circulation system includes a liquid supply cylinder body and a spray device, the liquid supply cylinder body includes a liquid collection port, a liquid injection port and a liquid outlet, the liquid collection port is used to collect the cutting fluid after spraying, and the liquid injection port is used to inject new cutting fluid when the liquid supply cylinder body is working; the liquid supply cylinder body is connected to the spray device through the liquid outlet, so that the cutting fluid circulates in the cutting fluid circulation system. When the cutting fluid circulation system is working, new cutting fluid can be injected at any time through the liquid injection port 13, and mixed with the old cutting fluid to achieve the purpose of reducing the content of silicon powder in the cutting fluid.

[0035] In the technical solution of the present application, a first filter device 17 is also provided on the liquid supply cylinder body 1. The first filter device 17 is a coarse filter device for filtering the cutting liquid collected by the liquid collection port. The liquid supply cylinder body 1 is divided into a liquid collection tank 15 and a liquid supply tank 16 which are interconnected by the first liquid supply device. The liquid collection port 11 is provided on the liquid collection tank 15, and the liquid outlet 12 and the liquid injection port 13 are respectively provided on the liquid supply tank 16. The first filter device 17 can prevent large particles of impurities in the cutting liquid from entering the liquid supply tank. Preferably, the first filter device 17 is a filter mesh. Further improvement is made on the basis that the first filter device 17 divides the liquid supply cylinder body into a liquid collection tank and a liquid supply tank. A plurality of filter meshes are provided. A plurality of filter spaces are divided between the liquid collection tank 15 and the liquid supply tank 16 by the filter meshes. When the cutting liquid passes through all the filter spaces, it can prevent the flow rate of the cutting liquid in the liquid collection tank 15 from being too large to bring large-particle silicon powder or impurities into the liquid supply tank 16.

[0036] By setting a liquid injection port on the liquid supply cylinder body 1, new cutting liquid is continuously injected into the cutting liquid circulation system (in this application, the unused cutting liquid is referred to as new cutting liquid, and the cutting liquid containing silicon powder after acting on the cutting area is referred to as old cutting liquid), and the old cutting liquid is continuously diluted so that its silicon powder content is within a lower range, which is beneficial to improving the spray quality of the cutting liquid, reducing the occurrence of cutting line jumps or breaks, and reducing the risk of scratches on the cutting surface, which is beneficial to improving the cutting quality and cutting efficiency.

[0037] In order to ensure that stable cutting fluid can be provided to the outside at the liquid outlet 12, a liquid supply power device is also arranged in the liquid supply cylinder body 1. The liquid supply power device is a first liquid supply pump arranged in the liquid supply tank 16. The first liquid supply pump is connected to the liquid outlet 12 to provide stable cutting liquid delivery power for the cutting liquid circulation system.

[0038] On the basis of the above-mentioned embodiments, as a preference, a drain port 14 is provided in the liquid supply cylinder body 1 of the present application, and the drain port 14 is provided on the liquid collecting tank 15, and a first control valve is provided on the drain port 14. Alternatively, the drain port 14 is provided at the upper part of the liquid supply cylinder body 1, and when new cutting liquid is injected through the liquid injection port 13, the cutting liquid containing silicon powder is discharged in an overflow manner; there is a certain difference between the drain port on the liquid supply cylinder body 1 of the present application and the prior art. The drain port in the prior art is mainly used to discharge liquid when the liquid supply cylinder body 1 is shut down, while in the present application, the drain port 14 is mainly used to discharge the cutting liquid containing silicon powder collected in the liquid collecting tank in real time during the cutting process. During the cutting process, new cutting liquid is continuously injected through the liquid injection port 13, so that the total amount of cutting liquid in the cutting liquid circulation system increases, so the cutting liquid containing silicon powder is discharged through the drain port, thereby achieving the purpose of adjusting the silicon powder content in the cutting liquid and balancing the liquid supply in the cutting liquid circulation system.

[0039] In order to facilitate the control of the amount of new cutting fluid input into the cutting fluid circulation system, the present technical solution also provides a secondary flow meter in the cutting fluid circulation system. The secondary flow meter is provided on the connecting branch corresponding to the liquid injection port. The amount of new cutting fluid added can be counted by the secondary flow meter. At the same time, a secondary flow meter is also provided on the connecting branch corresponding to the liquid discharge port. By controlling the opening size of the first control valve, the amount of cutting fluid discharged is kept equal to the amount of cutting fluid input at the liquid injection port, thereby ensuring the liquid supply balance in the cutting fluid circulation system. At the same time, the dilution ratio of the old cutting fluid can be roughly calculated through the flow data.

[0040] The cutting fluid circulation system of the present application also includes a second filter device 2 and a heat exchanger 3. The liquid outlet 12 is connected to the second filter device 2, and the second filter device 2 is connected to the spray device 4 through the heat exchanger 3. The liquid collection port 11 is used to collect the cutting fluid sprayed from the spray device 4, thereby forming a cutting fluid circulation system.

[0041] In order to further improve the filtering effect of the cutting fluid circulation system, two second filtering devices 2 are provided in the cutting fluid circulation system of the present application, wherein one second filtering device 2 is connected between the liquid collecting device and the heat exchanger 3, and the other second filtering device 2 is connected between the heat exchanger 3 and the spray device 4, thereby performing double filtering on the circulating cutting fluid to prevent large particles of impurities from entering the spray device, thereby avoiding the risk of cutting line breakage or line jumping caused by large particles of impurities.

[0042] In the cutting liquid circulation system, the injection port of the liquid supply cylinder body 1 is connected to an external centralized liquid supply system, and the centralized liquid supply system can continuously provide new cutting liquid, which can be a new liquid pool, etc. The centralized liquid supply system is connected to the liquid supply cylinder body 1 through the injection port 13, and the discharge port 14 on the liquid supply cylinder body 1 is connected to the external ditch 6, and a second liquid supply pump is provided on the liquid infusion pipeline connecting the centralized liquid supply system and the liquid supply cylinder body 1. When the liquid circuit circulates, the cutting liquid in the centralized liquid supply system can be pumped to the liquid supply cylinder body 1 through the second liquid supply pump, and a second control valve is provided on the liquid infusion pipeline between the centralized liquid supply system and the injection port 13, so that the injection of new cutting liquid can be controlled in real time.

[0043] After cutting is stopped, some cutting fluid will remain in the pipeline of the cutting fluid circulation system. In order to facilitate the discharge of the residual cutting fluid, the second filtering device 2, the heat exchanger 3 and the spraying device 4 are respectively connected to the ditch 6 through the return pipe 61, or the devices in the above-mentioned links are respectively connected to the liquid collecting tank 15 of the liquid supply cylinder body 1. After cutting is stopped, the residual cutting fluid can be discharged through the return pipe 61.

[0044] With the advancement of science and technology, the requirements for cutting equipment are also developing in the direction of intelligent control. Therefore, in order to better understand the state of the cutting fluid in the cutting fluid circulation system, here mainly refers to the real-time state of the cutting fluid during the cutting process, a cutting fluid content detection unit is also arranged between the heat exchanger 3 and the spray device 4. The content detection unit is used to detect the content of silicon powder in the cutting fluid in the cutting fluid circulation system. The specific content detection unit adopts a light detection method, and measures the content of silicon powder by detecting the amount of suspended particles in the cutting fluid. The detected data is fed back to the controller, and the opening and closing of the first control valve and the second control valve are controlled by the controller to realize the replacement of the cutting fluid in the liquid supply cylinder body 1, and the amount of cutting fluid discharged and injected can be controlled respectively through the branch flowmeter, so as to realize the precise adjustment of the silicon powder content in the cutting fluid through calculation.

[0045] According to the third aspect of the utility model, a wire cutting machine is provided, comprising a cutting chamber and the cutting liquid circulation system described in the above embodiment, wherein the spray device 4 is arranged inside the cutting chamber, and the liquid supply cylinder body 1 is arranged below the cutting chamber. When the liquid supply cylinder body 1 is arranged below the cutting chamber, an opening can be provided below the cutting chamber in accordance with this structure, and the size of the opening corresponds to the size of the liquid collecting port 11. This eliminates the need for a drainage structure inside the cutting chamber, simplifies the overall structural layout, and reduces the cost of the equipment. In an alternative embodiment, a liquid infusion pipeline can be provided at the bottom of the cutting chamber, which is connected to the liquid collecting port of the liquid supply cylinder body 1 through the liquid infusion pipeline, so that the liquid supply cylinder body can be provided outside the wire cutting machine.

[0046] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work should fall within the scope of protection of the present utility model.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cutting fluid circulation system, characterized in that: It includes a liquid supply cylinder body and a spray device, wherein the liquid supply cylinder body includes a liquid collecting port, a liquid injection port and a liquid outlet, the liquid collecting port is used to collect the cutting liquid after spraying, and the liquid injection port is used to inject new cutting liquid when the liquid supply cylinder body is working; the liquid supply cylinder body is connected with the spray device through the liquid outlet to allow the cutting liquid to circulate.

2. The cutting fluid circulation system according to claim 1, characterized in that: The liquid supply cylinder body is provided with a first filter device, and the first filter device is used for coarsely filtering the collected cutting liquid.

3. The cutting fluid circulation system according to claim 2, characterized in that: The liquid supply cylinder body is divided into a liquid collecting tank and a liquid supply tank by the first filtering device. The liquid collecting tank and the liquid supply tank are interconnected by the first filtering device to filter the collected cutting liquid, and the liquid collecting port is arranged on the liquid collecting tank, and the liquid outlet and the liquid injection port are respectively arranged on the liquid supply tank.

4. The cutting fluid circulation system according to claim 3, characterized in that: The first filtering device is a filtering mesh.

5. The cutting fluid circulation system according to claim 2, characterized in that: A first liquid supply pump is arranged in the liquid supply tank, and the first liquid supply pump is communicated with the liquid outlet.

6. The cutting fluid circulation system according to any one of claims 1 to 5, characterized in that: It also includes a liquid discharge port, which is arranged in the liquid collecting groove of the liquid supply cylinder body, and a first control valve is arranged on the liquid discharge port.

7. The cutting fluid circulation system according to claim 6, characterized in that: The liquid discharge port and the liquid injection port are respectively provided with branch flow meters, and the branch flow meters are respectively used to detect the amount of liquid discharged and injected into the liquid supply cylinder body.

8. The cutting fluid circulation system according to claim 6, characterized in that: It comprises a second filtering device and a heat exchanger. The liquid supply cylinder body is connected with the second filtering device through a liquid outlet, and the second filtering device is connected with the spraying device through the heat exchanger.

9. The cutting fluid circulation system according to claim 8, characterized in that: The liquid injection port of the liquid supply cylinder body is communicated with the cutting supply device.

10. The cutting fluid circulation system according to claim 9, characterized in that: The cutting liquid supply device is a centralized liquid supply system, and a second control valve is provided on the liquid infusion pipeline between the centralized liquid supply system and the liquid injection port.

11. The cutting fluid circulation system according to claim 9, characterized in that: The second filter device, the heat exchanger and the spray device are respectively connected to the liquid discharge port or the liquid collecting tank of the liquid supply cylinder body through a reflux pipeline, and control valves are arranged on all the reflux pipelines.

12. A wire cutting machine, characterized in that: It comprises a cutting chamber and a cutting fluid circulation system as described in any one of claims 1 to 11, wherein the spray device is arranged inside the cutting chamber, and the liquid collecting port of the liquid supply cylinder body is used to collect the cutting fluid flowing out of the cutting chamber.

13. The wire cutting machine according to claim 12, characterized in that: The liquid supply cylinder body is arranged below the cutting chamber, an opening is arranged below the cutting chamber, and the opening corresponds to the liquid collecting port of the liquid supply cylinder body.

14. The wire cutting machine according to claim 12, characterized in that: The liquid supply cylinder body is arranged outside the wire cutting machine, and a liquid infusion pipeline is arranged below the cutting chamber, and the liquid infusion pipeline is communicated with the liquid collecting port.

15. The wire cutting machine according to claim 12, characterized in that: The wire cutting machine is a slicer.

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