A slow wire sawing apparatus

Abstract

The application discloses a slow wire cutting equipment, which comprises a machine body, a liquid storage pool arranged on the machine body, a moving frame in sliding connection with the machine body, a plurality of guide wheels arranged on the machine body and the moving frame, and a protection assembly. The protection assembly comprises a communication block, a protection column is inserted into the communication block, a through groove is arranged in the center of the column body of the protection column, the through groove penetrates through the protection column, and a second water guide groove is arranged in the lower end surface of the protection column and located between the outer wall of the protection column and the through groove. The slow wire cutting equipment can effectively protect the thin copper wire, avoid the change of the discharge gap between the thin copper wire and the workpiece caused by the oxide skin and carbon residue generated in the workpiece cutting process, ensure the stable discharge state between the thin copper wire and the workpiece, effectively prevent the thin copper wire from being broken due to the change of the discharge gap during the workpiece cutting, avoid the workpiece from being scrapped, and further help to improve the machining quality and the working efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of slow wire cutting equipment, and specifically relates to a slow wire cutting device. Background Technology

[0002] Wire EDM machines utilize a continuously moving fine copper wire as an electrode, generating temperatures exceeding 6000 degrees Celsius through pulsed spark discharge to erode metal and cut it into workpieces. Their machining accuracy can reach the micron level, offering advantages in high precision and high surface finish, making them suitable for the precision machining industry.

[0003] In wire EDM, a continuously moving fine copper wire applies pulsed spark discharge to the workpiece, generating high temperatures to erode the metal and cut the workpiece into shape. A gap exists between the fine copper wire and the workpiece, allowing for continuous metal removal through discharge. In practice, the workpiece is immersed in a coolant for heat dissipation. However, during processing, oxide scale and carbon residue form on the workpiece. These alter the discharge gap between the wire and the workpiece, leading to poor discharge conditions and localized overheating of the wire, frequently causing wire breakage.

[0004] Existing technologies offer limited protection for fine copper wires. If the wire breaks during the cutting process, it will cause the hassle of rewinding, which not only wastes time but also leaves broken wire marks on the workpiece, affecting the processing quality and potentially rendering the workpiece unusable.

[0005] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a slow wire cutting device.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a slow wire cutting device that can effectively protect the fine copper wire, prevent the oxide scale and carbon slag generated during the workpiece cutting process from changing the discharge gap between the fine copper wire and the workpiece, thereby ensuring a stable discharge state between the fine copper wire and the workpiece, effectively preventing the fine copper wire from breaking due to changes in the discharge gap during workpiece cutting, avoiding workpiece scrap, and thus helping to improve processing quality and work efficiency.

[0008] To achieve the above objectives, a specific embodiment of the present invention provides a slow wire cutting device, including a machine body, a liquid storage tank on the machine body, a movable frame slidably connected to the machine body, and multiple sets of guide wheels installed on both the machine body and the movable frame. The slow wire cutting device further includes:

[0009] A fixed plate is detachably mounted on a movable frame, and the fixed plate moves along with the movable frame on the machine body;

[0010] A protective component includes a connecting block, a protective column inserted into the connecting block, a through groove at the center of the protective column, the through groove penetrating the protective column, a second water guide groove on the lower end face of the protective column, the second water guide groove being located between the outer wall of the protective column and the through groove, a water passage hole communicating with the second water guide groove on the outer wall of the protective column, a first water guide groove matching the water passage hole on the connecting block, a first water pipe inserted into the first water guide groove, and a water pump fixedly connected to the end of the first water pipe away from the connecting block;

[0011] A clamping assembly is installed in a liquid reservoir on the machine body and is used to fix the workpiece placed on the machine body.

[0012] In one or more embodiments of the present invention, a second water pipe is fixedly connected to the water pump, and a filter is fixedly connected to the end of the second water pipe away from the water pump.

[0013] In one or more embodiments of the present invention, a third water pipe is installed on the filter, and the end of the third water pipe away from the filter is inserted into the liquid storage tank of the machine body.

[0014] In one or more embodiments of the present invention, a fixing tube is integrally formed on the connecting block, a slot is formed on the upper end surface of the fixing tube, the protective post penetrates the fixing tube, and a protrusion matching the slot is fixedly connected to the protective post.

[0015] In one or more embodiments of the present invention, a second air guide groove is further provided on the lower end face of the protective column. The second air guide groove is located between the second water guide groove and the through groove. A vent hole communicating with the second air guide groove is provided on the protective column. A first air guide groove matching the vent hole is provided on the connecting block. An air pipe is inserted into the first air guide groove. An air pump is fixedly connected to the end of the air pipe away from the connecting block.

[0016] In one or more embodiments of the present invention, the cross-sections of the second water guide channel and the second air guide channel are both annular, and the bottom wall of the second water guide channel is lower than the bottom wall of the second air guide channel.

[0017] In one or more embodiments of the present invention, the movable frame is provided with a first sliding groove, the first sliding groove is between a set of guide wheels, and a pressure wheel is slidably connected in the first sliding groove.

[0018] In one or more embodiments of the present invention, the clamping assembly includes a pair of guide rails fixedly connected to opposite walls of the liquid storage tank.

[0019] In one or more embodiments of the present invention, a pair of electronic sliders are slidably connected to the guide rail, a locking block is fixedly connected to the electronic slider, a bearing plate is fixedly connected to the side wall of the locking block, a second slide groove and a third slide groove are provided on the locking block, the second slide groove and the third slide groove are connected to each other, a pair of clamping blocks are slidably connected in the second slide groove and the third slide groove, a lead screw is threadedly connected to the pair of clamping blocks, and a rotary motor is installed at one end of the lead screw.

[0020] In one or more embodiments of the present invention, the distance between the lower end face of the pair of guide rails and the bottom wall of the liquid storage tank is 15-20cm.

[0021] Compared with the prior art, the slow wire cutting equipment of the present invention can effectively protect the fine copper wire when cutting the workpiece, and avoid the oxide scale and carbon slag generated during the workpiece cutting process from changing the discharge gap between the fine copper wire and the workpiece. This ensures a stable discharge state between the fine copper wire and the workpiece, effectively preventing the fine copper wire from breaking due to changes in the discharge gap during workpiece cutting, avoiding workpiece scrap, and thus helping to improve processing quality and work efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a slow wire cutting device according to an embodiment of the present invention. Figure 1 ;

[0024] Figure 2 This is a cross-sectional view of a slow wire cutting device according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a slow wire cutting device according to an embodiment of the present invention. Figure 2 ;

[0026] Figure 4 for Figure 3 Schematic diagram of the structure at point A;

[0027] Figure 5 This is a schematic diagram of the connecting block of a slow wire cutting device according to an embodiment of the present invention;

[0028] Figure 6 for Figure 5 Schematic diagram of the structure at point B;

[0029] Figure 7 This is a schematic diagram of the structure of a protective tube for a slow wire cutting device according to an embodiment of the present invention;

[0030] Figure 8 This is a cross-sectional view of the ventilation block and protective tube of a slow wire cutting device according to an embodiment of the present invention.

[0031] Figure 9 for Figure 8 A schematic diagram of the structure at point C.

[0032] Explanation of key figure labels:

[0033] 1. Body; 11. Guide wheel; 2. Moving frame; 21. First slide groove; 22. Pressure roller; 3. Fixing plate; 4. Connecting block; 401. First water guide groove; 402. First air guide groove; 41. Protective column; 4101. Through groove; 4102. Water passage hole; 4103. Air passage hole; 411. Protrusion; 412. Second water guide groove; 413. Second air guide groove; 42. Fixing pipe; 421. Slot; 5. First pressure pump; 51. First water pipe; 52. Second water pipe; 6. Second pressure pump; 61. Air pipe; 7. Filter; 71. Third water pipe; 8. Guide rail; 81. Electronic slider; 9. Locking block; 91. Second slide groove; 92. Third slide groove; 93. Bearing plate; 94. Clamping block; 95. Lead screw; 96. Rotary motor. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0035] like Figure 1 and Figure 2 As shown, a slow wire EDM device according to one embodiment of the present invention includes a body 1, on which a liquid storage tank is provided, the liquid storage tank containing coolant. A movable frame 2 is slidably connected to the body 1, and multiple sets of guide wheels 11 are installed on both the body 1 and the movable frame 2. Specifically, the workpiece is placed in the liquid storage tank, and a copper wire roll is rotatably connected to the body 1. The fine copper wire on the copper wire roll is guided by the multiple sets of guide wheels 11 and is in a vertical state to perform electrical cutting on the workpiece in the liquid storage tank.

[0036] During the cutting of the workpiece, oxide scale and carbon residue are generated. These oxide scale and carbon residue cause the discharge gap between the fine copper wire and the workpiece to change continuously, resulting in the breakage of the fine copper wire.

[0037] To solve the above problems, such as Figure 2 , Figure 7 , Figure 8 and Figure 9 As shown, a fixed plate 3 is welded onto the movable frame 2, and the fixed plate 3 moves along with the movable frame 2 on the body 1. A connecting block 4 is welded onto the front plate of the fixed plate 3, and a protective column 41 is inserted into the connecting block 4. A through groove 4101 is opened at the center of the column of the protective column 41, and the through groove 4101 penetrates the protective column 41. A second water guide groove 412 is opened on the lower end face of the protective column 41, and the second water guide groove 412 is located between the outer wall of the protective column 41 and the outer wall of the through groove 4101. A water passage hole 4102 connected to the second water guide groove 412 is opened on the outer wall of the protective column 41. A first water guide groove 401 matching the water passage hole 4102 is opened on the connecting block 4. A first water pipe 51 is inserted into the first water guide groove 401 and is inserted into the water passage hole 4102 and connected to the second water guide groove 412. A water pump 5 is welded to the end of the first water pipe 51 away from the connecting block 4.

[0038] Specifically, the fine copper wire, guided by the guide wheel 11, passes through the through groove 4101. The fine copper wire exiting the through groove 4101 discharges electricity with the workpiece, cutting it. At this time, the water pump 5 starts, outputting coolant into the first water pipe 51, which then flows into the second guide water tank 412. Because the flow rate of coolant entering the second guide water tank 412 remains constant, and the volume of the second guide water tank 412 is smaller than that of the first water pipe 51, the flow rate of coolant sprayed from the opening of the second guide water tank 412 increases, forming a protective column that washes away the oxide scale and carbon residue generated on the workpiece, keeping these particles away from the fine copper wire and the workpiece. This ensures that the discharge gap between the fine copper wire and the workpiece remains unchanged, protecting the fine copper wire. Simultaneously, the coolant sprayed from the second guide water tank 412 quickly exchanges heat with the coolant in the storage tank, further reducing the temperature of the fine copper wire, accelerating heat dissipation, and preventing breakage.

[0039] Furthermore, a second water pipe 52 is welded onto the water pump 5, and a filter 7 is detachably connected to the end of the second water pipe 52 away from the water pump 5. A third water pipe 71 is integrally formed on the filter 7, and the end of the third water pipe 71 away from the filter 7 is inserted into the liquid storage tank of the machine body 1. Specifically, because the water pump 5 continuously outputs coolant into the second water guide tank 412 during operation, the liquid in the liquid storage tank may overflow if there is too much liquid. The filter 7 continuously draws coolant from the liquid storage tank for filtration. The filtered coolant enters the water pump 5 and is pressurized by the water pump 5 to flow into the second water guide tank 412, thus keeping the volume of coolant in the liquid storage tank constant. At the same time, the coolant filtered by the filter 7 is free of impurities, which can also prevent contamination of the surface of the fine copper wire, ensure the conductivity between the electrode wire and the workpiece, and improve the quality of the workpiece.

[0040] Furthermore, a second air guide groove 413 is provided on the lower end face of the protective column 41, located between the wall of the second water guide groove 412 and the wall of the through groove 4101. A vent hole 4103 communicating with the second air guide groove 413 is provided on the protective column 41, and a first air guide groove 402 matching the vent hole 4103 is provided on the connecting block 4. An air pipe 61 is inserted into the first air guide groove 402, and an air pump 6 is connected to the end of the air pipe 61 away from the connecting block 4. Both the second water guide groove 412 and the second air guide groove 413 are annular, with the bottom wall of the second water guide groove 412 lower than the bottom wall of the second air guide groove 413. The second water guide groove 412 and the second air guide groove 413 are not interconnected, preventing the protective gas in the second air guide groove 413 from flowing into the second water guide groove 412.

[0041] Specifically, the air pump 6 is connected to a protective gas. When the fine copper wire cuts the workpiece, the air pump 6 is activated to compress the protective gas, which is then transmitted through the air pipe 61 to the second air guide groove 413. The protective gas is ejected from the opening of the second air guide groove 413, forming a virtual air column, thereby further isolating the oxide scale and carbon slag generated on the workpiece, further protecting the fine copper wire, and making the working state of the fine copper wire more stable. The protective gas can also stabilize the electric arc and reduce arc fluctuations, thereby improving cutting efficiency and cutting accuracy.

[0042] At the same time, the protective gas can isolate the air and prevent the fine copper wire from coming into contact with oxygen in the coolant, thereby preventing the fine copper wire from oxidizing, ensuring that the fine copper wire does not undergo an oxidation reaction, improving the secondary utilization rate of the fine copper wire, and reducing processing costs.

[0043] like Figure 5 and Figure 6As shown, in order to fix the protective column 41, the water passage hole 4102 and the air passage hole 4103 on the protective column 41 are aligned with the first water guide groove 401 and the first air guide groove 402 on the connecting block 4, respectively. A fixing tube 42 is integrally formed on the connecting block 4, and a slot 421 is opened on the upper end surface of the fixing tube 42. The protective column 41 passes through the fixing tube 42, and a protrusion 411 that matches the slot 421 is integrally formed on the tube wall of the protective column 41.

[0044] Specifically, the protective post 41 is inserted into the fixing tube 42, aligning the protrusion 411 with the slot 421. When the protrusion 411 is engaged in the slot 421 and its lower panel is in contact with the bottom wall of the second water guide groove 412, the water passage hole 4102 and the air passage hole 4103 can be aligned with the first water guide groove 401 and the first air guide groove 402 on the connecting block 4. In this way, even if the protective post 41 is damaged, a new protective post 41 can be quickly installed on the connecting block 4.

[0045] To keep the thin copper wire taut and prevent it from bending, such as Figure 2 and Figure 3 As shown, the movable frame 2 has a first sliding groove 21, which is located between two guide wheels 11. A pressure wheel 22 is slidably connected inside the first sliding groove 21.

[0046] Specifically, the pressure roller 22 presses against the thin copper wire between two adjacent guide rollers 11. When the thin copper wire bends, the pressure roller 22 slides downward in the first groove 21 under the action of gravity, and the weight of the pressure roller 22 can keep the thin copper wire taut.

[0047] like Figure 3 and Figure 4 As shown, a clamping assembly is also installed inside the machine body 1 to fix the workpiece. The clamping assembly includes a pair of guide rails 8, which are welded to the opposite walls of the liquid storage tank. A pair of electronic sliders 81 are slidably connected to the guide rails 8. A locking block 9 is integrally formed on the electronic slider 81, and a bearing plate 93 is integrally formed on the side wall of the locking block 9. The locking block 9 has a second slide groove 91 and a third slide groove 92, which are connected to each other, and the bottom wall of the third slide groove 92 is in contact with the upper end face of the bearing plate 93. A pair of clamping blocks 94 are slidably connected in both the second slide groove 91 and the third slide groove 92. A lead screw 95 is threadedly connected to the pair of clamping blocks 94, and a rotary motor 96 is mounted on the lead screw 95.

[0048] Specifically, a pair of clamping blocks 94 are provided with internal threads that match the lead screw 95, and the internal threads on the pair of clamping blocks 94 rotate in opposite directions. When the lead screw 95 rotates clockwise, the pair of clamping blocks 94 move closer to each other. When the lead screw 95 rotates counterclockwise, the pair of clamping blocks 94 move further apart.

[0049] When clamping the workpiece, first input the workpiece width into the machine body 1. After receiving the command, the electronic slider 81 moves along the guide rail 8, matching the distance between the pair of locking blocks 9 to the workpiece size. Then, the workpiece can be placed on the support plate 93, which holds the workpiece in place. Next, input the start command into the machine body 1 again, and the electronic sliders 81 move closer together to clamp the workpiece. Simultaneously, the rotary motor 96 starts, driving the pair of lead screws 95 closer together to clamp the four side walls of the workpiece.

[0050] Furthermore, the clamping block 94 is concave, and the part of the clamping block 94 that slides on the bearing plate 93 is the clamping part. Since the lower panel of the clamping part of the clamping block 94 is in contact with the upper panel of the bearing plate 93, the weight of the clamping block 94 presses on the bearing plate 93, which will not generate additional stress on the lead screw 95, and can protect the lead screw 95 and prevent the lead screw 95 from bending after long-term use.

[0051] Furthermore, the lower end face of the pair of guide rails 8 is 15-20cm away from the bottom of the reservoir, and the second groove 91 on the locking block 9 also penetrates both the upper and lower end faces of the locking block 9. The oxide scale and carbon residue generated when the fine copper wire cuts the workpiece will float in the coolant. These substances are denser than the coolant and will sink to the bottom of the reservoir. During the settling process, the oxide scale and carbon residue will pass through the second groove 91, preventing them from falling into the second groove 91 and causing difficulties in cleaning.

[0052] Because the bearing plate 93 is located outside the side wall of the locking block 9, the scale and carbon residue falling on the bearing plate 93 are easy to clean, without wasting too much labor. At the same time, because the guide rail 8 is a certain distance from the bottom of the storage tank, the scale and carbon residue will not be blocked by the guide rail 8 and the locking block 9 when cleaning the bottom of the storage tank, making it convenient to clean and maintain the storage tank.

[0053] In use, the workpiece is first fixed on the clamping assembly, and then the machine body 1 is started. At this time, multiple sets of guide wheels 11 rotate, and the fine copper wire cuts the workpiece. While the fine copper wire is cutting the workpiece, the water pump 5 continuously outputs coolant. The coolant output by the water pump 5 is transmitted to the second water guide tank 412 after passing through the first water pipe 51, and sprays out from the opening of the second water guide tank 412 to form a protective column, thereby protecting the fine copper wire. It can also wash away the oxide scale and carbon residue on the workpiece, keeping these oxide scale and carbon residue away from the fine copper wire, ensuring the discharge gap between the fine copper wire and the workpiece, and protecting the fine copper wire. Furthermore, it can also accelerate the flow rate of the coolant around the fine copper wire, further reducing the temperature of the fine copper wire, accelerating the heat dissipation effect of the fine copper wire, and preventing the fine copper wire from breaking.

[0054] Compared with the prior art, the slow wire cutting equipment of the present invention can effectively protect the fine copper wire when cutting the workpiece, and avoid the oxide scale and carbon slag generated during the workpiece cutting process from changing the discharge gap between the fine copper wire and the workpiece. This ensures a stable discharge state between the fine copper wire and the workpiece, effectively preventing the fine copper wire from breaking due to changes in the discharge gap during workpiece cutting, avoiding workpiece scrap, and thus helping to improve processing quality and work efficiency.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A slow wire cutting device, comprising a machine body, a liquid storage tank on the machine body, a movable frame slidably connected to the machine body, and multiple sets of guide wheels installed on both the machine body and the movable frame, characterized in that, Also includes: A fixed plate is detachably mounted on a movable frame, and the fixed plate moves along with the movable frame on the machine body; A protective component includes a connecting block. The connecting block is welded to the front plate of the fixing plate. A protective column is inserted into the connecting block. A through groove is formed at the center of the protective column, and the through groove penetrates the protective column. A second water guide groove is formed on the lower end face of the protective column. The second water guide groove is located between the outer wall of the protective column and the through groove. A water passage hole connected to the second water guide groove is formed on the outer wall of the protective column. A first water guide groove matching the water passage hole is formed on the connecting block. A first water pipe is inserted into the first water guide groove. A water pump is fixedly connected to the end of the first water pipe away from the connecting block. A clamping assembly is installed in a liquid reservoir on the machine body and is used to fix the workpiece placed on the machine body; The second water channel sprays out coolant to form a protective column, which washes away the oxide scale and carbon residue generated on the workpiece, keeping the oxide scale and carbon residue away from the fine copper wire and the workpiece. The lower end face of the protective column is also provided with a second air guide groove, which is located between the second water guide groove and the through groove. The protective column is provided with a vent hole that communicates with the second air guide groove. The connecting block is provided with a first air guide groove that matches the vent hole. An air pipe is inserted into the first air guide groove, and an air pump is fixedly connected to the end of the air pipe away from the connecting block.

2. The slow wire cutting device according to claim 1, characterized in that, A second water pipe is fixedly connected to the water pump, and a filter is fixedly connected to the end of the second water pipe away from the water pump.

3. The slow wire cutting device according to claim 2, characterized in that, A third water pipe is installed on the filter, and the end of the third water pipe away from the filter is inserted into the liquid storage tank of the machine body.

4. The slow wire cutting device according to claim 1, characterized in that, A fixed tube is integrally formed on the connecting block, and a slot is opened on the upper end surface of the fixed tube. The protective column passes through the fixed tube, and a protrusion that matches the slot is fixedly connected to the protective column.

5. The slow wire cutting device according to claim 1, characterized in that, The cross-sections of the second water guide channel and the second air guide channel are both annular, and the bottom wall of the second water guide channel is lower than the bottom wall of the second air guide channel.

6. The slow wire cutting device according to claim 1, characterized in that, The mobile frame is provided with a first sliding groove, which is located between a set of guide wheels, and a pressure wheel is slidably connected in the first sliding groove.

7. The slow wire cutting device according to claim 1, characterized in that, The clamping assembly includes a pair of guide rails, which are fixedly connected to the opposite walls of the liquid storage tank.

8. The slow wire cutting device according to claim 7, characterized in that, A pair of electronic sliders are slidably connected to the guide rail. A locking block is fixedly connected to the electronic slider. A bearing plate is fixedly connected to the side wall of the locking block. A second slide groove and a third slide groove are opened on the locking block. The second slide groove and the third slide groove are connected to each other. A pair of clamping blocks are slidably connected in the second slide groove and the third slide groove. A lead screw is threadedly connected to the pair of clamping blocks. A rotary motor is installed at one end of the lead screw.

9. A slow wire cutting device according to claim 8, characterized in that, The distance between the lower end face of the pair of guide rails and the bottom wall of the liquid storage tank is 15-20cm.

Images