Method for improving linear cutting machining quality through multi-medium multi-time cutting
Through the multi-media multi-cutting process and the design of the water mist medium supply device, the problem of insufficient quality and efficiency of electric spark wire cutting processing is solved, and high-quality and efficient processing effects are achieved, which is suitable for a wide range of applications in the manufacturing industry.
Patent Information
- Application Number
- CN202510561050.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2025-07-25
AI Technical Summary
The existing electric spark wire cutting processing technology has shortcomings in terms of processing quality and efficiency, especially in multiple cutting processes, the surface quality of the liquid-gas composite process is better than that of the pure liquid process, but the efficiency is low, the effect of the water mist medium is not obvious, and the cost is higher.
Multi-media multi-cutting process is adopted, including the first cutting in the working fluid, the second cutting in the steam water mist medium, the third cutting in the ultrasonic water mist medium, and the fourth cutting in the gas or ultrasonic water mist medium with low water mist water content. At the same time, a water mist medium supply device is designed to adjust the type and water content of the water mist.
It significantly improves the quality and efficiency of wire cutting, reduces costs, and is suitable for high-speed and low-speed wire cutting machine tools, especially in high-speed wire cutting machine tools, the effect is more significant.
Smart Images
Figure CN120362623A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of wire electrical discharge machining, and particularly relates to a method for improving the machining quality of wire electrical discharge machining by using multi-media multi-pass cutting. Background Art
[0002] The essence of wire electrical discharge machining technology is to erode the workpiece by spark discharge. Therefore, the cutting process is not limited by the hardness and toughness of the workpiece material. Moreover, with the ability of flexible machining after digital control, it is widely used in the fields of aerospace, medical industry, mold manufacturing, machining of precision or complex-shaped parts, and trial production of new products.
[0003] In China, wire cutting machines are generally divided into two categories: one is the reciprocating wire cutting machine (high-speed wire cutting machine), in which the electrode wire moves at a high speed reciprocally during machining, and the wire running speed is generally 8 - 10 m / s, and the working fluid is generally the working fluid. It is the main machine type produced and used in China and is also the original wire electrical discharge machining mode in China. Currently, the annual output of reciprocating wire cutting machines is about 30,000 units, and the total market inventory has exceeded 600,000 units. The other is the unidirectional wire cutting machine (low-speed wire cutting machine), in which the electrode wire moves at a low speed unidirectionally, and the wire running speed is generally less than 0.25 m / s, and the working fluid is deionized water. Compared with the unidirectional wire cutting machine (low-speed wire cutting machine), the high-speed wire cutting machine has a lower machining cost and a wider range of applications.
[0004] The advantages and disadvantages of wire electrical discharge machining technology are mainly judged from two dimensions: machining quality and machining speed. The machining quality is divided into two aspects: surface quality and machining accuracy. The surface quality generally includes surface roughness and surface metamorphic layer (surface stress, morphology, composition, and defects, etc.); the machining accuracy usually includes dimensional accuracy, shape accuracy, and position accuracy. The machining speed is used to evaluate the machining efficiency, generally referring to the area passed by the electrode wire per unit time, with the unit of mm 2 / min. With the development of technology, high efficiency and high quality requirements are put forward for wire electrical discharge machining, which promotes the development of wire electrical discharge machining technology.
[0005] To meet the above requirements, the wire electrical discharge machining (WEDM) generally adopts the multi-cut process at present. The multi-cut process mainly includes three machining stages: rough cutting, intermediate cutting, and finish cutting. The rough cutting generally refers to the first cut, and its main task is to quickly and stably remove most of the material on the workpiece to obtain the basic contour of the part. Its characteristic is to select a larger electrical parameter (pulse width and peak current) during machining to obtain a higher machining speed and a larger material removal amount, but the requirement for machining quality is not high. The intermediate cutting includes several cuts starting from the second cut. Its purpose is to gradually reduce the material removal amount while ensuring an appropriate machining speed, and continuously improve the surface quality and machining accuracy. Usually, a smaller electrical parameter is selected in this stage to reduce the material removal amount and avoid dimensional deviation and increased roughness caused by excessive erosion. The finish cutting usually refers to the last one or two cuts, and its main purpose is to achieve the required dimensional accuracy and surface finish. Usually, an even smaller electrical parameter is selected in the finish cutting stage, and the machining material removal amount and machining depth are very small. To gradually improve the machining quality, there are also certain requirements for the wire speed of the wire cutting machine, that is, a faster wire feeding speed is selected in the rough cutting stage to quickly discharge the removed material from the cut and bring the working fluid into the cut to prevent abnormal discharge; while a slower wire feeding speed is selected in the intermediate cutting and finish cutting stages to prevent the wire electrode from vibrating violently due to the too fast wire speed, resulting in a reduction in machining quality.
[0006] With the in-depth research on the multi-cut technology, the machining medium has gradually developed from the multi-cut process with a pure liquid medium to a liquid-gas composite multi-cut process (i.e., rough machining and semi-finish machining are carried out in the working fluid, and then finish machining is carried out in the gas medium), and then to a multi-medium multi-cut process (i.e., rough machining is carried out in the working fluid, then semi-finish machining and finish machining are carried out in the water mist medium, and finally finish machining is carried out in the gas medium). Research shows that the surface machining quality of the liquid-gas composite multi-cut process is better than that of the multi-cut process in pure liquid, but inferior to that of the multi-medium multi-cut process.
[0007] This is because there is an electrolytic effect during machining in the working fluid, resulting in the formation of micro-holes on the workpiece surface. At the same time, due to the dual effects of electrostatic force and explosive force, the amplitude of the electrode wire is the largest in the middle part of the workpiece, affecting the stability of the machining process, causing a large straightness error on the machined surface, and reducing the surface quality and machining accuracy. Compared with traditional working fluids, when finishing machining with an atmospheric medium, not only are the improvements in surface roughness, straightness, etc. prominent, but also the machining speed is significantly higher than that in liquid machining. Because compared with liquid media, the discharge channel radius in gas is large, the energy density is low, and the discharge explosion force is small, so the single-pulse electro-erosion pit shows the characteristics of being large and shallow; moreover, due to the absence of the impact of high-speed liquid and the influence of high electrostatic force and high explosive force, the electrode wire is more stable during machining in gas, and there is no electrolytic effect during machining in gas, so the straightness and roughness of the machined surface in gas are better than those in liquid. It can be seen that gas media are very suitable for finishing and ultra-precision machining. Therefore, under the same machining conditions, the surface quality of the liquid-gas composite multi-pass machining process is better than that in pure liquid.
[0008] However, research has found that the heat dissipation and chip removal capabilities during machining in gas are weak, resulting in low machining efficiency. But adding liquid droplets with a certain pressure into the atmosphere, that is, using a water mist medium, can effectively improve its heat dissipation and chip removal capabilities, and thus improve the machining quality and machining efficiency. This is because the liquid droplets themselves and the vaporization of the liquid droplets absorb heat, enabling the molten metal to cool faster. Due to the presence of liquid droplets, compared with gas media, during machining in a water mist medium, the water mist has a stronger inhibitory ability on the expansion of the discharge channel and a larger discharge explosion force in the water mist. Therefore, the electro-erosion pit of single-pulse discharge in the water mist medium is larger and deeper, the material erosion ability is stronger, and the erosion speed is faster. So the straightness and roughness of the machined surface in the water mist medium are inferior to those in gas, but the cutting efficiency is higher than that in machining in gas. Research has also found that under the same machining conditions, the surface roughness of machining in the water mist medium is smaller than that in the working fluid. Therefore, after machining in liquid and then machining in water mist, the machining quality of the workpiece is higher than that of multi-pass cutting in pure liquid media. At the same time, machining in water mist before machining in gas can effectively reduce the surface roughness and straightness, reduce the material removal amount during machining in gas, and enable the high-quality characteristics of machining in gas to be reflected. Therefore, the machining quality of the multi-media multi-pass cutting process is better than that of the liquid-gas composite multi-pass machining process.
[0009] With the in-depth research on the water mist medium, it is found that the water mist medium can be divided into steam water mist and ultrasonic water mist. When the two water mist media are applied to processing, different processing characteristics will be manifested, that is, both the type of water mist and the droplet content in the water mist will have a great impact on the processing effect. Research shows that the size and content of droplets will have a great impact on the processed surface. Due to the existence of droplets, after the inter-electrode electric field is applied, positive and negative charges will accumulate on the surface layer of the droplets respectively. At this time, bound charges appear on the droplet surface, resulting in the distortion of the original uniform electric field, and the maximum electric field intensity around the droplets is about 3 times that without droplets. Therefore, the existence of droplets will reduce the breakdown voltage and insulation strength of the inter-electrode medium. Therefore, the breakdown voltage and insulation strength of the water mist medium are closely related to the size and content of droplets.
[0010] The generation principle of steam water mist is to use a heating body to heat and evaporate water to generate water vapor, and then condense to form small droplets. The droplet size is in the range of 10 - 30μm, and the small droplets are more likely to aggregate into larger droplets. Ultrasonic water mist is that the vibrating piece vibrates at a high frequency to break up water into tiny droplets. The droplet size is in the range of 1 - 5μm, and the droplet distribution of ultrasonic water mist is more uniform and not easy to aggregate into larger droplets. Therefore, the processing conditions are relatively stable. The content of droplets in the water mist is expressed by the water content of the water mist. For the convenience of measurement, the water consumption per unit time is used instead, with the unit of ml / min.
[0011] It is found that with the increase of the water content of the water mist, the cross-section of the discharge channel will gradually shrink, increasing the discharge explosion force. Therefore, the material removal rate will increase accordingly, but the surface roughness and straightness will both increase, reducing the processing quality, and at the same time the processing speed will also gradually decrease. Moreover, the greater the water content of the water mist, the closer it is to the processing effect in the liquid, and the smaller the water content of the water mist, the closer it is to the processing effect in the gas. Generally, the water content of the water mist within 100 ml / min can meet the needs of wire electrical discharge machining. When the water content of the water mist is greater than 100 ml / min, the processing quality in the mist is closer to that in the liquid, but the cost of using the water mist with too high a water content is much higher than that of processing in the liquid. Therefore, it is not economical. Due to the characteristics of larger droplet particles and easier aggregation of steam water mist, the processing effect in steam water mist is closer to that in the liquid. And due to the characteristics of smaller droplet size, not easy to aggregate, and uniform distribution of ultrasonic water mist, its processing effect is closer to that in the gas.
[0012] Steam-water mist and ultrasonic water mist machining experiments with the same water content in the water mist found that the straightness and roughness during machining in the ultrasonic water mist medium were significantly smaller, the machining speed was faster, but the material removal rate was lower. This is because the droplet diameter of the steam-water mist is larger than that of the ultrasonic water mist, so the density, viscosity, etc. of the steam-water mist are greater than those of the ultrasonic water mist. Therefore, for the ultrasonic water mist with the same water mist volume, the inhibitory effect on the discharge channel is weaker, the electro-erosion pits removed by single-pulse discharge are larger and shallower, and the obtained surface roughness is better. Therefore, due to the different characteristics of the steam-water mist and the ultrasonic water mist, the multi-medium and multi-pass cutting process has more adjustable parameters during machining in the mist, that is, different machining effects can be achieved by selecting the type of water mist and the water content of the water mist. At the same time, since these two types of water mist are generated from pure water, when using these two types of water mist for finish machining, it will not pollute the liquid supply system of the machine tool and will not change the concentration ratio of the working fluid. Since the pressure of the fluid has a greater impact on the stability of the electrode wire, too large a pressure will cause the electrode wire to vibrate violently, resulting in unsatisfactory machining quality. Therefore, the pressure of the gas medium and the water mist medium used should not be too large. It is found that when the fluid pressure is less than 0.3 MPa, the vibration of the fluid on the electrode wire is relatively small.
[0013] In summary, during liquid-medium discharge, the expansion ability of the discharge channel is the weakest, the formed channel radius is the smallest, the current density and the explosion force are both large. Therefore, the electro-erosion pits removed by single-pulse discharge are small and deep, so the surface roughness is poor. At the same time, due to the large explosion force and the impact of the liquid, the electrode wire vibrates relatively violently, resulting in poor straightness. The density of the atmospheric medium is small, the cross-section of the formed discharge channel is large, the energy in the channel is dispersed, and the explosion force acting on the workpiece surface is small. Therefore, the electro-erosion pits removed by single-pulse discharge are large and shallow, so the surface roughness is better than that in the liquid. At the same time, since the discharge explosion force during machining in the air is small and the influence of the low-speed air flow on the vibration of the electrode wire is small, the electrode wire does not vibrate violently, so the straightness during machining in the air is the best. Since the density, viscosity, etc. of the water mist are between the liquid and gas media, the cross-section size of the formed discharge channel, the generated explosion force, the size and depth of the single-pulse electro-erosion pit, as well as the final surface roughness and straightness are all between those of the liquid and the atmosphere.
[0014] In order to improve the processing effect of multiple cutting process of wire cutting of electrical discharge, according to the processing characteristics of working fluid, gas medium and water mist medium, as well as the influence of water mist droplet size and water content on processing, a process of using multiple cutting to improve the processing quality of wire cutting was developed. The experimental results show that the use of the above-mentioned multiple cutting process of multiple media can gradually improve the processing quality of wire cutting machine tools, and can significantly improve the processing quality under the premise of slightly increasing the processing cost. Its final processing quality and processing speed are better than the multiple cutting process that completely uses working fluid and the multiple cutting process of liquid-gas composite. At the same time, this process can improve the processing quality and processing efficiency when using high-speed and low-speed wire cutting machine tools, but the experimental results show that the processing quality of this process applied to high-speed wire cutting machines is more improved. Therefore, this multi-media multiple cutting process has further developed and improved the multiple cutting process of wire cutting of electrical discharge.
[0015] Considering the wide application of wire EDM technology in manufacturing, the developed multi-media multiple cutting process has important practical significance and broad application prospects. Summary of the invention
[0016] The present invention proposes a method for improving the quality of wire cutting by using multiple media multiple cutting, which improves the processing quality and efficiency of wire cutting multiple cutting process; and designs a matching water mist medium supply device according to the proposed processing technology, which has a low cost for generating water mist and can significantly improve the processing quality of multiple cutting under the premise of slightly increasing the processing cost. The present invention has important practical significance and broad application prospects in the manufacturing industry.
[0017] In order to achieve the above object, the present invention adopts the following technical solution:
[0018] A method for improving the quality of wire cutting processing by using multiple cutting with multiple media is characterized in that it includes the following steps: performing the first cutting in a working fluid; performing the second cutting in a steam mist medium; performing the third cutting in an ultrasonic mist medium; and performing the fourth cutting in a gas or ultrasonic mist medium with low mist content.
[0019] The water mist medium supply device is designed for a method of using multiple media and multiple cutting to improve the quality of wire cutting processing. Its components include: a water mist generation system and a water mist blowing system. Its characteristics are: the water mist generation system generates steam water mist or ultrasonic water mist with a specific water mist content, and the water mist blowing system guides the water mist to the workpiece processing area.
[0020] The water mist medium supply device is characterized in that: the water mist generation system consists of a switch module, a steam module, an ultrasonic module and a water storage module. The switch module is used to turn on the water mist medium supply device, select to generate steam water mist or ultrasonic water mist, and adjust the water content of the water mist. The steam module generates steam water mist by heating water with a heating body, and the heating body is composed of multiple heating wires connected in parallel, so that the heating body has a multi-gear working mode, and then generates steam water mist with adjustable water content. The ultrasonic module generates ultrasonic water mist by driving water to vibrate at high frequency with an atomizing plate, and the atomizing plate is composed of multiple vibrating plates connected in parallel. Selecting different numbers of vibrating plates to participate in the work is to adjust the generation of ultrasonic water mist with different water contents. The water storage module is used to store water and automatically supply water to the steam and ultrasonic modules.
[0021] The water mist medium supply device is characterized in that: the water mist blowing system consists of a fan, a conduit and a nozzle. In order to prevent the electrode wire from vibrating due to the airflow with relatively high pressure, which will affect the processing quality, the fan is used to generate an airflow not greater than 0.3 MPa and blow the water mist to the processing surface. The conduit is a heat-insulating pipe. The nozzle is used to guide and adjust the water mist so that the water mist can smoothly flow to the workpiece processing area.
[0022] Preferably, in the method for improving wire cutting processing quality by using multi-media and multi-pass cutting, the pressure of the water mist medium and the gas medium used should be less than 0.3 MPa, and the water content of the water mist in the water mist medium should be less than 100 ml / min.
[0023] Preferably, in the method for improving wire cutting processing quality by using multi-media and multi-pass cutting, the droplet size of the steam water mist is in the range of 10 - 30 μm, and the droplet size of the ultrasonic water mist is in the range of 1 - 5 μm.
[0024] The beneficial effects of the present invention are as follows: The method for improving wire cutting processing quality by using multi-media and multi-pass cutting can effectively improve the processing quality and processing speed of electrical discharge wire cutting. It can significantly improve the processing quality on the premise of slightly increasing the processing cost. The roughness, straightness and surface layer condition of the final processed surface are better than those of multi-pass cutting in pure liquid and liquid-gas composite multi-pass cutting, which promotes the development and improvement of the multi-pass cutting process of electrical discharge wire cutting. By selecting the water mist type and adjusting the water content of the water mist, the processing quality can be gradually close to the processing target, overcoming the problem of insignificant processing effect in the water mist medium. Using the water mist medium supply device designed by the present invention can meet the requirements of the multi-media and multi-pass cutting process of electrical discharge wire cutting for multiple types and large flow rates of water mist media. Moreover, it can more conveniently and quickly change the water mist type and adjust the water content of the water mist, simplify the processing steps of the multi-media and multi-pass cutting process, and improve the production efficiency. The present invention is widely applied in the manufacturing industry and has important practical significance and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the water mist medium supply device for processing the present invention.
[0026] Figure 1 In: 1. Workpiece; 2. Electrode wire; 3. Nozzle; 4. Insulation tube; 5. Water mist generator; 6. Control panel; 7. Air duct; 8. Fan; 9. Water storage tank; 10. Heating element; 11. Atomizing plate; 12. Water duct. DETAILED DESCRIPTION
[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments 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.
[0028] Embodiment 1: A method for improving the quality of wire cutting by using multiple cutting with multiple media is characterized in that it includes the following steps: the first cutting is performed in a working fluid, and a larger electrical gauge and a faster wire speed are used in this cutting, while the electrical gauge used is gradually reduced and a slower wire speed is used in the second to fourth cutting. The purpose of the first cutting is to quickly remove the material, but the processing quality requirement is not high, and a contour close to the target can be processed. The working fluid is the processing medium provided by the machine tool, and the water mist medium supply device designed by the present invention does not work during this cutting; the second cutting is performed in a steam water mist medium, and the water mist medium supply device starts to work and provides steam water mist at this stage, and the machine tool liquid supply device is closed. The purpose of the second cutting is to ensure the appropriate processing speed while continuously improving the processing accuracy and surface quality; the third cutting is performed in an ultrasonic water mist medium, and the water mist medium supply device provides ultrasonic water mist at this stage, and the machine tool liquid supply device is closed. The purpose of the third cutting is to ensure the appropriate processing speed while further improving the processing accuracy and surface quality; the fourth cutting is performed in a gas or ultrasonic water mist medium with low water mist content, and its purpose is to achieve the target processing quality. If gas medium is used, the water mist medium supply device and the machine tool fluid supply device do not work, and the atmosphere or compressed gas is used to directly participate in the processing; if an ultrasonic water mist medium with low water mist content is used, a water mist medium supply device is used to generate ultrasonic water mist with a lower water mist content.
[0029] Embodiment 2: A method for improving the quality of wire cutting by using multi-media and multi-cutting as described in Embodiment 1, characterized in that: the pressure of the water mist medium and the gas medium should be less than 0.3 MPa, and the water content of the water mist in the water mist medium is less than 100 ml / min. When the water content of the water mist is greater than 100 ml / min, the machining quality in the mist is relatively close to that in the liquid, but the cost of using a water mist with an excessive water content of the water mist is much higher than that of machining in the liquid, so it is not economical.
[0030] Embodiment 3: A water mist medium supply device designed for a method for improving the quality of wire cutting by using multi-media and multi-cutting as described in Embodiments 1 and 2, comprising: a water mist generation system and a water mist blowing system, characterized in that: the water mist generation system generates steam water mist or ultrasonic water mist with a water content of less than 100 ml / min of the water mist, and the water mist blowing system conducts the water mist to the workpiece machining surface.
[0031] Embodiment 4: The water mist medium supply device as described in Embodiment 3, characterized in that: the water mist generation system is composed of a switch module, a steam module, an ultrasonic module, and a water storage module. The switch module refers to the control panel 6, and the control panel is provided with buttons for turning on / off the supply device, and knobs for respectively adjusting the water content of the steam water mist or the ultrasonic water mist. The switch module is used to turn on the water mist medium supply device, select to generate steam water mist or ultrasonic water mist, and adjust the water content of the water mist. The steam module is used to generate steam water mist with adjustable water content of the water mist. The principle is that the heating body 10 heats pure water to generate water vapor, and adjusting the number of heating wires participating in the work is to adjust the water content of the steam water mist. The heating body 10 is composed of multiple heating wires; the ultrasonic module is used to generate ultrasonic water mist with adjustable water content of the water mist. The principle is that the atomization plate 11 vibrates to drive the pure water to vibrate at a high frequency to generate water mist, and adjusting the number of vibrating plates participating in the work is to adjust the water content of the ultrasonic water mist. The atomization plate 11 is composed of multiple vibrating plates connected in parallel; the water storage module is composed of a water storage tank 9, and the water storage module is used to store pure water and automatically supply water to the steam and ultrasonic modules.
[0032] Embodiment 5: The water mist medium supply device as described in Embodiments 3 and 4, characterized in that: the water mist blowing system is composed of a blower, a conduit, and a nozzle. The blower is used to generate an air flow not greater than 0.3 MPa and blow the water mist to the machining surface; the conduit is a heat-insulating pipe to prevent the generated water mist from condensing and liquefying; the nozzle is used to guide and adjust the water mist so that the water mist can flow smoothly to the workpiece machining area.
[0033] Specifically, in the method of using multiple cuttings with multiple media to improve the quality of wire cutting, during the first cutting, the processing medium is the working fluid, and the fluid is supplied by the machine tool's own fluid supply system, so the water mist medium supply device is in a closed state. During the second and third cuttings, the processing medium is water mist, and the machine tool's own fluid supply system is closed, and the water mist medium supply device starts to work. Before turning on the water mist medium supply device, fix the nozzle 3 in a suitable position, and add a sufficient amount of pure water to the water reservoir 9. Subsequently, turn on the switch on the control panel 6, and select the steam gear or the ultrasonic gear to start the water mist generation system. The steam gear can adjust the steam knob to make the heating body 10 of different gears participate in the work to generate steam water mist with a specific water mist water content; in the ultrasonic gear, the ultrasonic module starts to work, and the ultrasonic knob is adjusted to make the atomization plate 11 in different working modes, that is, different numbers of vibrating plates participate in the work to generate ultrasonic water mist with a specific water mist water content. Both the steam gear and the ultrasonic gear can generate water mist with a water mist water content of 0-100ml / min. As the water mist generation system works, the water mist blowing system also starts working. At this time, the fan 8 starts working and generates an airflow of no more than 0.3MPa. The airflow pushes the water mist generated in the water mist generator 5 through the air guide pipe 7 to flow to the nozzle 3 through the insulation pipe 4. After the nozzle is adjusted, the water mist flows out to the processing surface of the workpiece 1 and the electrode wire 2. During the fourth cutting, the processing medium is the atmosphere or ultrasonic water mist with low water mist content. If gas medium is used for processing, the water mist medium supply device and the machine tool liquid supply device do not work, and the atmosphere or compressed gas can be used directly for processing; if an ultrasonic water mist medium with low water mist content is used, the water mist medium supply device is used to generate ultrasonic water mist with a lower water mist content.
[0034] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments with equivalent changes using the above disclosed technical contents without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement of the above embodiments, which does not depart from the content of the technical solution of the present invention, is still within the protection scope of the technical solution of the present invention, based on the technical essence of the present invention, and within the spirit and principles of the present invention.
Claims
1. A method for improving the quality of wire cutting by multi-media multi-cutting, characterized in that, It includes the following steps: the first cutting is carried out in the working fluid; the second cutting is carried out in the steam water mist medium; the third cutting is carried out in the ultrasonic water mist medium; the fourth cutting is carried out in the gas or the ultrasonic water mist medium with a low water mist water content.
2. A method for improving the quality of wire cutting processing by using multi-media multiple cutting according to claim 1, characterized in that: The pressure of the water mist medium and the gas medium used should be less than 0.3 MPa, the water content of the water mist medium is less than 100 ml / min, the droplet size of the steam water mist is in the range of 10 - 30 μm, and the droplet size of the ultrasonic water mist is in the range of 1 - 5 μm.
3. A water mist medium supply device designed for the method of improving wire cutting processing quality by using multiple media for multiple cuts according to claim 1 or 2, comprising: A water mist generation system and a water mist blowing system, characterized in that: the water mist generation system generates steam water mist or ultrasonic water mist with a specific water content of the water mist, and the water mist is led to the workpiece processing area by the water mist blowing system.
4. The water mist medium supply device according to claim 3, characterized in that: The water mist generation system is composed of a switch module, a steam module, an ultrasonic module, and a water storage module. The switch module is used to turn on the water mist medium supply device, select to generate steam water mist or ultrasonic water mist, and adjust the water content of the water mist. The steam module generates steam water mist by heating water with a heating body, and the heating body is composed of multiple heating wires connected in parallel, so that the heating body has a multi - gear working mode, and then generates steam water mist with adjustable water content. The ultrasonic module generates ultrasonic water mist by driving water to vibrate at high frequency with an atomizing plate, and the atomizing plate is composed of multiple vibrating pieces connected in parallel. Selecting different numbers of vibrating pieces to participate in the work generates ultrasonic water mist with different water contents of the water mist. The water storage module is used to store water and automatically supply water to the steam and ultrasonic modules.
5. The water mist medium supply device according to claim 3, characterized in that: The water mist blowing system is composed of a fan, a conduit, and a nozzle. The fan is used to generate an air flow not greater than 0.3 MPa and blow the water mist to the processing surface. The conduit is a heat - insulating pipe. The nozzle is used to guide and adjust the water mist so that the water mist can flow smoothly to the workpiece processing area.