Circulating purification device for working fluid of low-speed wire cutting machine tool

Abstract

The utility model provides a low-speed wire cutting machine tool working fluid circulation purification device, which relates to the technical field of circulation purification devices and comprises a low-speed wire cutting machine tool, a fluid drainage window, a dirty fluid collection tank body, a swirler, a clear fluid heat preservation box, a filter, a constant temperature control structure, a water pump and a heat preservation structure. The waste liquid collecting tank body is used for collecting waste liquid generated when the low-speed wire cutting machine cools machining materials, then large-mass impurities in the waste liquid in the waste liquid collecting tank body are preliminarily separated through the hydrocyclone, and then fine filtering is conducted on the waste liquid with the large-mass impurities preliminarily removed through the filter to remove fine impurities. And then the filtered water is guided into the clear liquid heat preservation box for temporary storage, the constant temperature control structure is used for controlling the temperature of the working fluid in the clear liquid heat preservation box to be constant through heating or refrigerating, and the situation that the material cooling machining quality is affected due to temperature fluctuation during cooling use is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of circulating purification devices, and in particular to a circulating purification device for machining fluid in a slow wire EDM machine. Background Technology

[0002] The descriptions in this section provide background information relating to this disclosure and do not constitute prior art.

[0003] With the rapid development of my country's aerospace technology industry, high-power military electronic devices have been applied in a wider range of fields. The processing of the packaging shells of high-power military electronic devices sometimes uses slow wire cutting machines.

[0004] Most existing slow wire EDM machines operate in coolant to cool the material being processed. The processing fluid needs to be replaced or replenished regularly, which is cumbersome. The processing fluid can be reused after filtration and circulation, but simple filtration and circulation cannot guarantee the purity of the processing fluid, and the lack of temperature control during circulation causes fluctuations in the cooling effect, affecting the quality of material cooling and processing. Utility Model Content

[0005] The purpose of this invention is to provide a circulating purification device for machining fluid in a slow wire EDM machine tool. It has the advantages of multi-stage purification to remove impurities from the waste fluid and constant temperature control of the machining fluid in the clean fluid insulation tank by heating or cooling. It solves the technical problems of existing technologies that cannot guarantee the purity of the machining fluid through simple filtration and circulation, and lack of temperature control of the machining fluid during circulation.

[0006] This utility model provides a circulating purification device for the machining fluid of a slow wire EDM machine tool, comprising:

[0007] The slow wire EDM machine tool has a drain window on its operating table;

[0008] The wastewater collection tank is fixedly mounted on the lower end of the slow wire EDM machine tool;

[0009] The hydrocyclone's inlet end is fixedly connected to the lower end of the side wall of the sludge collection tank via a pipe;

[0010] The clear liquid insulation box is detachably assembled on the top surface of the slow wire EDM machine. The bottom surface of the clear liquid insulation box is connected to the machining fluid input end of the slow wire EDM machine through a pipeline.

[0011] The output end of the hydrocyclone is fixedly connected to a filter, and its output end is fixedly connected to the side wall of the clear liquid insulation tank through a pipe.

[0012] The clear liquid insulation box is equipped with a constant temperature control structure.

[0013] Water pumps are installed on the pipes from the hydrocyclone to the sludge collection tank and the pipes from the filter to the clear liquid insulation box.

[0014] The outer wall of the pipe from the filter to the clear liquid insulation box is equipped with an insulation structure.

[0015] As a further optimization, in order to remove ionic contaminants from the finely filtered water and further purify the water, a mixed ion exchanger is fixedly connected to the pipeline from the filter to the clear liquid insulation tank.

[0016] As a further optimization, in order to maintain the temperature of the processing fluid in the clear liquid insulation tank at 20±1℃ through the cooperation of sensors, controllers, and refrigeration and heating devices, the temperature control structure includes:

[0017] Semiconductor coolers and heaters are both distributed on opposite side walls of the clear liquid insulation tank;

[0018] A temperature sensor is embedded in the outer wall of the clear liquid insulation box, and the sensing end of the temperature sensor extends into the clear liquid insulation box.

[0019] The controller is electrically connected to the temperature sensor, the thermoelectric cooler, and the heater, respectively.

[0020] As a further optimization, in order to cool or heat the clear liquid insulation box more evenly, the semiconductor cooler and heater are arranged in a longitudinal row.

[0021] The semiconductor coolers and heaters are arranged in a vertical column with spacing between them.

[0022] As a further optimization, in order to improve the accuracy of temperature detection of the processing fluid inside the clear liquid insulation box and better control the temperature of the processing fluid inside the clear liquid insulation box, multiple temperature sensors are provided, and the multiple temperature sensors are arranged in a vertical row at three positions on the upper, middle and lower parts of the outer wall of the clear liquid insulation box.

[0023] As a further optimization, in order to insulate the connecting pipe from the filter to the clear liquid insulation tank and reduce the impact of the temperature transferred through the pipe on the temperature change of the processing fluid inside the clear liquid insulation tank, the insulation structure includes:

[0024] An insulating sleeve is wrapped around the outer wall of the pipe from the filter to the clear liquid insulation tank.

[0025] As a further optimization, in order to improve the insulation performance at the connection pipe interface between the filter and the clear liquid insulation box and reduce the impact of the temperature transfer of the pipe on the temperature change of the processing fluid in the clear liquid insulation box, one end of the insulation pipe is fixedly sleeved on the outer wall of the insulation sleeve near the clear liquid insulation box.

[0026] A rubber layer is attached and fixed to the other end of the insulation pipe, which abuts against the side wall of the clear liquid insulation box.

[0027] As a further optimization, in order to perform fine filtration on the waste liquid after preliminary impurity removal and remove small particulate impurities, the filter includes:

[0028] A cylindrical shell, with connecting pipes fixedly connected to the middle of both ends;

[0029] The connecting pipe on one side is fixedly connected to the output end of the cyclone separator;

[0030] The connecting pipe on the other side is fixedly connected to the side wall of the clear liquid insulation box via a pipeline;

[0031] The inner wall of the cylindrical shell is fitted with a first filter, a second filter, and a third filter along the direction from near the hydrocyclone to away from the hydrocyclone, and the pore size of the three filters gradually decreases.

[0032] As a further optimization, in order to facilitate the removal of the first, second, and third filter screens inside the cylindrical housing when disassembling the cover plate, and to facilitate the cleaning and maintenance of the filter screens, the cylindrical housing is designed with an opening on one side, and a cover plate is fixedly assembled at the opening of the cylindrical housing by bolts.

[0033] The cover plate is vertically fixed to a connecting rod on one side edge of the columnar shell;

[0034] The first filter screen, the second filter screen, and the third filter screen are fixed to the connecting rod.

[0035] As a further optimization, in order to reduce the splashing of cutting fluid, the slow wire EDM machine tool is equipped with a shielding housing, which has inlet and outlet windows.

[0036] The inlet and outlet windows are hinged with cabinet doors.

[0037] This utility model provides an improved circulating purification device for machining fluid in a slow wire EDM machine tool, which has the following improvements and advantages compared with the prior art:

[0038] Waste liquid generated by a slow wire EDM machine during material processing is collected in a waste liquid collection tank. Large impurities are then initially separated from the waste liquid in the collection tank using a hydrocyclone. Next, the waste liquid, after the initial removal of large impurities, undergoes fine filtration to remove smaller impurities. The filtered water is then temporarily stored in a clean liquid insulation tank. A constant temperature control structure is used to maintain the temperature of the processing fluid in the clean liquid insulation tank through heating or cooling, preventing temperature fluctuations during cooling and ensuring the quality of material processing. Attached Figure Description

[0039] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of this utility model;

[0041] Figure 2 This is a schematic diagram of the constant temperature control structure of this utility model;

[0042] Figure 3 This is a schematic diagram of the pipeline structure from the filter to the clear liquid insulation box of this utility model;

[0043] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0044] Figure 5 This is a schematic cross-sectional view of the filter structure of this utility model.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1- Slow wire EDM machine tool, 2- Wastewater collection tank, 3- Hydrocyclone, 4- Mixed ion exchanger, 5- Filter, 51- Columnar shell, 52- Connecting pipe, 53- First filter screen, 54- Second filter screen, 55- Third filter screen, 56- Cover plate, 57- Connecting rod, 6- Clear liquid insulation box, 7- Constant temperature control structure, 71- Semiconductor cooler, 72- Heater, 73- Temperature sensor, 74- Controller, 8- Water pump, 9- Insulation structure, 91- Insulation sleeve, 92- Insulation pipe, 93- Rubber layer. Detailed Implementation

[0047] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0048] In the description of this utility model, 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", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0049] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] Please see Figure 1-5 This utility model provides a technical solution: a circulating purification device for machining fluid in a slow wire EDM machine, comprising:

[0051] The slow wire EDM machine tool 1 has a drain window on its operating table;

[0052] The wastewater collection tank 2 is fixedly mounted on the lower end of the slow wire EDM machine tool 1;

[0053] The hydrocyclone 3 has its input end fixedly connected to the lower end of the side wall of the sewage collection tank 2 via a pipe;

[0054] The clear liquid insulation box 6 is detachably assembled on the top surface of the slow wire EDM machine tool 1, and the bottom surface of the clear liquid insulation box 6 is connected to the processing fluid input end of the slow wire EDM machine tool 1 through a pipeline.

[0055] The output end of the hydrocyclone 3 is fixedly connected to the filter 5, and its output end is fixedly connected to the side wall of the clear liquid insulation box 6 through a pipe.

[0056] The clear liquid insulation box 6 is equipped with a constant temperature control structure 7;

[0057] Water pumps 8 are installed on the pipes from hydrocyclone 3 to sludge collection tank 2 and from filter 5 to clear liquid insulation tank 6.

[0058] The outer wall of the pipe from filter 5 to clear liquid insulation box 6 is equipped with insulation structure 9.

[0059] Specifically, in this embodiment, the slow wire EDM machine tool 1 is an existing device that cools the workpiece and material by spraying out processing fluid during processing. The processing fluid here is coolant, and the processing fluid carrying impurities is discharged from the drain window into the waste liquid collection tank 2.

[0060] The hydrocyclone 3 is an existing technology application that is widely used in the field of wastewater treatment. It can effectively separate and remove heavier coarse particles such as mud and sand from wastewater. In this embodiment, it is used to remove heavier metal debris.

[0061] Furthermore, the waste liquid collected in the waste liquid collection tank 2 is used to collect the waste liquid generated by the slow wire EDM machine tool 1 in cooling the material processing. Then, the waste liquid in the waste liquid collection tank 2 is initially separated into large mass impurities by the hydrocyclone 3. Then, the waste liquid that has been initially removed of large mass impurities is finely filtered by the filter 5 to remove small impurities. Then, the filtered water is introduced into the clear liquid heat preservation tank 6 for temporary storage. The processing fluid in the clear liquid heat preservation tank 6 is introduced into the processing fluid delivery system built into the slow wire EDM machine tool 1.

[0062] More specifically, a constant temperature control structure 7 is set on the outer wall of the clear liquid heat preservation box 6. The constant temperature control structure 7 is used to control the temperature of the processing liquid in the clear liquid heat preservation box 6 by heating or cooling, so as to avoid temperature fluctuations during cooling and use, which would affect the cooling and processing quality of the material.

[0063] It is understandable that after the processing fluid has been used for a certain period of time, it is necessary to replenish the fluid in a timely manner to compensate for the loss of processing fluid due to splashing, evaporation, atomization, and the presence of processing materials.

[0064] In some embodiments, a mixed ion exchanger 4 is fixedly connected to the pipeline from the filter 5 to the clear liquid insulated tank 6 to further purify the processing liquid in order to remove ion contaminants from the water after fine filtration.

[0065] In some embodiments, the temperature control structure 7 includes:

[0066] Semiconductor cooler 71 and heater 72 are both distributed on opposite side walls of clear liquid insulation tank 6;

[0067] Temperature sensor 73 is embedded in the outer wall of the clear liquid insulation box 6, and the detection end of temperature sensor 73 extends into the clear liquid insulation box 6.

[0068] The controller 74 is electrically connected to the temperature sensor 73, the semiconductor cooler 71, and the heater 72, respectively.

[0069] Specifically in this embodiment, the temperature sensor 73 is a common existing sensor type, used to detect the temperature of the processing fluid in the clear liquid insulation box 6; the controller 74 is specifically a PLC controller.

[0070] The semiconductor cooler 71 and heater 72 are existing technologies. The semiconductor cooler 71 is a cooling device composed of semiconductors. The heater 72 is an electric heater that uses a resistance wire to generate heat.

[0071] Furthermore, the controller 74 sets upper and lower temperature thresholds. When the upper threshold is reached, the semiconductor cooler 71 is controlled to cool, and when the lower threshold is reached, the heater 72 is controlled to heat. This achieves constant temperature control of the processing liquid in the clear liquid insulation box 6, maintaining the temperature at 20±1℃.

[0072] In some embodiments, the semiconductor cooler 71 and the heater 72 are arranged in a vertical row;

[0073] The longitudinally arranged semiconductor coolers 71 and heaters 72 are spaced apart, which allows for more uniform cooling or heating of the clear liquid insulation box 6.

[0074] In some embodiments, multiple temperature sensors 73 are provided, and the multiple temperature sensors 73 are arranged in a vertical row at three locations on the upper, middle and lower parts of the outer wall of the clear liquid insulation box 6.

[0075] Specifically, in this embodiment, three temperature sensors 73 are set at the top, middle and bottom, and the average value is taken for multi-point detection to improve the accuracy of temperature detection of the processing fluid in the clear liquid insulation box 6 and better control the temperature of the processing fluid inside the clear liquid insulation box.

[0076] Understandably, temperature detection points can be added or reduced as needed.

[0077] In some embodiments, the thermal insulation structure 9 includes:

[0078] The insulation sleeve 91 is wrapped around the outer wall of the pipe from the filter 5 to the clear liquid insulation tank 6. The connection between the pipe and the clear liquid insulation tank 6 allows for the transfer of temperature to the outside, making the temperature of the processing fluid in the clear liquid insulation tank 6 more susceptible to the influence of the external ambient temperature, increasing the workload of the constant temperature control structure 7. The insulation sleeve 91 reduces the transfer of temperature, thereby reducing the influence of the external ambient temperature on the temperature of the processing fluid in the clear liquid insulation tank 6.

[0079] In some embodiments, one end of the insulation tube 92 is fixedly sleeved on the outer wall of the insulation sleeve 91 near the side of the clear liquid insulation box 6.

[0080] A rubber layer 93 is attached and fixed to the other end of the insulation pipe 92, which abuts against the side wall of the clear liquid insulation box 6. The connection end between the pipe and the clear liquid insulation box 6 is more conducive to temperature conduction. Multiple layers of insulation protection are provided at this point to further reduce the influence of the external ambient temperature on the temperature of the processing fluid in the clear liquid insulation box 6.

[0081] In some embodiments, filter 5 includes:

[0082] A cylindrical shell 51, with connecting pipes 52 fixedly connected to the middle of both ends;

[0083] One side connecting pipe 52 is fixedly connected to the output end of the hydrocyclone 3;

[0084] On the other side, the connecting pipe 52 is fixedly connected to the side wall of the clear liquid insulation box 6 through a pipe;

[0085] The inner wall of the cylindrical shell 51 is fitted with a first filter screen 53, a second filter screen 54 and a third filter screen 55 along the direction from near the hydrocyclone 3 to away from the hydrocyclone 3, and the pore size of the three screens gradually decreases.

[0086] Specifically, in this embodiment, the pore size of the third filter 55 is 1 μm, and the pore sizes of the second filter 54 and the first filter 53 gradually increase by 1 μm.

[0087] Furthermore, the multi-stage filtration of the waste liquid after initial purification through the first filter screen 53, the second filter screen 54, and the third filter screen 55 ensures that the final filtered processing liquid can be used.

[0088] In some embodiments, the cylindrical housing 51 has an opening on one side, and a cover plate 56 is bolted to the opening of the cylindrical housing 51.

[0089] The cover plate 56 is vertically fixed to a connecting rod 57 on one side edge of the columnar shell 51;

[0090] The first filter screen 53, the second filter screen 54, and the third filter screen 55 are fixed to the connecting rod 57.

[0091] Specifically in this embodiment, when the cover plate 56 is disassembled, it is convenient to pull out the first filter screen 53, the second filter screen 54 and the third filter screen 55 inside the cylindrical housing 51, which facilitates the cleaning and maintenance of the filter screens;

[0092] Furthermore, the removal of cover plate 56 requires the removal of bolts, and the installation of bolts is performed in reverse.

[0093] In some embodiments, the slow wire EDM machine tool 1 is provided with a shielding housing, which has a material inlet and outlet window;

[0094] The inlet and outlet windows are hinged with cabinet doors to reduce the splashing of cutting fluid.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A circulating purification device for machining fluid in a slow wire EDM machine, characterized in that, include: The slow wire EDM machine (1) has a drain window on its operating table; The wastewater collection tank (2) is fixedly mounted on the lower end of the slow wire EDM machine (1); The hydrocyclone (3) has its input end fixedly connected to the lower end of the side wall of the sewage collection tank (2) through a pipe; The clear liquid heat preservation box (6) is detachably assembled on the top surface of the slow wire EDM machine (1), and the bottom surface of the clear liquid heat preservation box (6) is connected to the processing fluid input end of the slow wire EDM machine (1) through a pipeline; The output end of the hydrocyclone (3) is fixedly connected to a filter (5), and its output end is fixedly connected to the side wall of the clear liquid insulation box (6) through a pipe; The liquid insulation box (6) is equipped with a constant temperature control structure (7); Water pumps (8) are installed on the pipes from the hydrocyclone (3) to the sludge collection tank (2) and the pipes from the filter (5) to the clear liquid insulation box (6); The outer wall of the pipe from the filter (5) to the clear liquid insulation box (6) is equipped with an insulation structure (9).

2. The circulating purification device for machining fluid in a slow wire EDM machine tool according to claim 1, characterized in that, A mixed ion exchanger (4) is fixedly connected to the pipeline from the filter (5) to the clear liquid insulation box (6).

3. The circulating purification device for machining fluid in a slow wire EDM machine tool according to claim 1, characterized in that, The constant temperature control structure (7) includes: Semiconductor cooler (71) and heater (72) are both distributed on opposite side walls of clear liquid heat preservation tank (6); A temperature sensor (73) is embedded in the outer wall of the clear liquid insulation box (6), and the detection end of the temperature sensor (73) extends into the clear liquid insulation box (6); The controller (74) is electrically connected to the temperature sensor (73), the semiconductor cooler (71), and the heater (72), respectively.

4. The circulating purification device for machining fluid in a slow wire EDM machine tool according to claim 3, characterized in that, The semiconductor cooler (71) and heater (72) are arranged in a vertical row; The semiconductor coolers (71) and heaters (72) are arranged in a vertical row at intervals.

5. The circulating purification device for machining fluid in a slow wire EDM machine tool according to claim 3, characterized in that, The temperature sensor (73) is provided in multiple positions, and the multiple temperature sensors (73) are arranged in a vertical row at three positions on the outer wall of the clear liquid insulation box (6).

6. The circulating purification device for machining fluid in a slow wire EDM machine tool according to claim 1, characterized in that, The thermal insulation structure (9) includes: An insulating sleeve (91) is wrapped around the outer wall of the pipe from the filter (5) to the clear liquid insulation tank (6).

7. The circulating purification device for machining fluid in a slow wire EDM machine tool according to claim 6, characterized in that, The outer wall of the insulation sleeve (91) is fixedly fitted with one end of the insulation tube (92) on the side near the clear liquid insulation box (6); A rubber layer (93) is attached and fixed to the other end of the insulation pipe (92), which abuts against the side wall of the clear liquid insulation box (6).

8. The circulating purification device for machining fluid in a slow wire EDM machine tool according to claim 1, characterized in that, The filter (5) includes: A cylindrical shell (51) has connecting pipes (52) fixedly connected to the middle of both ends; The connecting pipe (52) on one side is fixedly connected to the output end of the cyclone separator (3); The connecting pipe (52) on the other side is fixedly connected to the side wall of the clear liquid insulation box (6) through a pipe; The inner wall of the columnar shell (51) is fitted with a first filter screen (53), a second filter screen (54) and a third filter screen (55) along the direction from near the cyclone separator (3) to away from the cyclone separator (3), and the aperture of the three screens gradually decreases.

9. The circulating purification device for machining fluid in a slow wire EDM machine tool according to claim 8, characterized in that, The cylindrical shell (51) has an opening on one side, and a cover plate (56) is fixedly mounted at the opening of the cylindrical shell (51) by bolts. The cover plate (56) is vertically fixed to a connecting rod (57) on one side edge of the columnar shell (51); The first filter (53), the second filter (54) and the third filter (55) are fixed on the connecting rod (57).

10. The circulating purification device for machining fluid in a slow wire EDM machine tool according to claim 1, characterized in that, The slow wire EDM machine (1) is provided with a shielding housing, which has a material inlet and outlet window; The inlet and outlet windows are hinged with cabinet doors.

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