A slow wire cutting machine tool

Abstract

The utility model relates to fine parts processing equipment technical field, specifically disclose a slow wire cutting machine tool, including support, collect silk cylinder and adjusting assembly, support installs in the inboard of liquid storage tank and one end extends to the above one end of liquid storage tank, the other end of support and located in the inboard bottom end of liquid storage tank is equipped with a plurality of conveying wheel for conveying machine tool electrode wire under the use state, the annular groove width value of a plurality of conveying wheels gradually increases along the one end of support to the other end of support, collect silk cylinder rotation installation in the one end side of support, the utility model discloses through the annular groove width value of a plurality of conveying wheels gradually increases along the one end of support to the other end of support arrangement, and when adjusting assembly will slide along the length direction of silk cylinder reciprocating movement, slide rod drives electrode wire to adjust direction gradually in a plurality of conveying wheels, effectively avoided the misplacement separation phenomenon of electrode wire in the conveying process, improved cutting accuracy and stability.

Description

Technical Field

[0001] This utility model relates to the technical field of precision parts processing equipment, specifically to a slow wire EDM machine tool. Background Technology

[0002] As a key piece of equipment in the field of precision machining, wire EDM machines use a continuously moving electrode wire to perform pulsed spark discharge on the workpiece, enabling high-precision machining of parts with high surface quality. They are widely used in industries such as mold manufacturing and precision component production. However, with the increasing demands for machining accuracy and stability in industrial manufacturing, the shortcomings of existing wire EDM machines in the electrode wire feeding and winding stages have become increasingly apparent, becoming a major bottleneck restricting machining quality.

[0003] The existing Chinese patent with authorization announcement number CN220144938U employs a multi-motor drive mode to guide and wind the electrode wire. On one hand, a motor drives the take-up roller to rotate, completing the wire winding; on the other hand, another independent motor drives a guide wheel to move along the length of the take-up roller to ensure uniform winding of the electrode wire. However, this design has significant shortcomings: First, multi-motor operation requires complex synchronous control logic. If the motor speed matching accuracy is insufficient, it can easily lead to fluctuations in electrode wire tension, causing wire breakage or positional deviation. Second, the existing design has a narrow annular groove in the middle of the lower guide wheel and guide wheel. During high-speed transport, if the electrode wire experiences a slight shift due to equipment vibration or positional deviation, it is very easy for it to become misaligned and separate from the guide wheel and guide wheel, not only interrupting the processing flow but also affecting the final cutting accuracy due to the electrode wire's positional deviation. Furthermore, the support structure design of some slow wire cutting machines is unreasonable, failing to fully adapt to the spatial layout of the liquid storage tank. This makes it difficult to form a smooth electrode wire transport path between the conveyor wheel and the take-up roller, further exacerbating the instability of electrode wire transport. Meanwhile, the guide wheel groove opening lacks a protective design, making it easy for the electrode wire to rub against the sharp edge of the groove when it enters, causing damage to the electrode wire surface, shortening its service life, and increasing processing costs. Utility Model Content

[0004] The purpose of this invention is to provide a slow wire cutting machine tool with good processing stability, small precision fluctuation, low maintenance cost, and high cutting efficiency.

[0005] This utility model is achieved through the following technical solution: a slow wire cutting machine tool, including a liquid storage tank, a support, a take-up roller, an adjustment component and multiple conveying wheels; The bracket is installed inside the liquid storage tank, with one end of the bracket extending along the height direction of the liquid storage tank to the top of one end of the liquid storage tank, and the other end of the bracket located at the bottom of the inner side of the liquid storage tank. Multiple conveying wheels are rotatably mounted at the other end of the bracket for guiding and conveying the machine tool electrode wire when the machine tool is in use. The width of the annular groove of the multiple conveying wheels gradually increases from the end of the bracket away from the take-up roller to the end of the bracket closer to the take-up roller. The take-up roller is rotatably mounted on the side of one end of the bracket that extends above the liquid storage tank, and is used to take up the electrode wire when the machine tool is in use; A drive assembly is provided at the end of the take-up roller and on the other side of the bracket away from the take-up roller. The drive assembly is connected to the take-up roller in a transmission manner and is used to drive the take-up roller to rotate around its own axis in the machine tool usage state to realize the winding of the electrode wire. The adjustment component is installed on the side of the bracket where the take-up roller is located, and the adjustment component is associated with the drive component and the electrode wire drive respectively. The outer side of the adjustment component is connected to the guide wheel through the bearing. The guide wheel is used to convey the electrode wire guided by the conveyor wheel to the take-up roller when the machine tool is in use.

[0006] The working principle of this technical solution is as follows: by utilizing the structure of the gradually changing width of the annular groove of the conveying wheel, the electrode wire gradually adjusts its posture as it transitions from the wide groove to the narrow groove, adapting to the position of the subsequent guide wheel and take-up roller, and avoiding edge misalignment; by simultaneously linking the take-up roller and the adjustment component through the drive component, the synchronous operation of the electrode wire winding and the guide wheel position adjustment is achieved, ensuring that the electrode wire is always in the preset conveying path during the winding process.

[0007] To better realize this utility model, the plurality of conveying wheels are arranged at equal intervals along the direction from the end of the support away from the take-up roller to the end of the support close to the take-up roller, and the central axis of each conveying wheel is arranged collinearly with the central axis of the take-up roller.

[0008] To better realize this utility model, the adjusting component further includes a mounting bracket, a reciprocating screw, and a slider; the mounting bracket is fixedly installed on the side of the support where the take-up roller is located; the reciprocating screw is rotatably mounted on the mounting bracket via a bearing, and one end of the reciprocating screw extends along its own axis to the other side of the support away from the take-up roller, and is connected to the drive component for transmission; the slider is threaded onto the outside of the reciprocating screw, and the outside of the slider is rotatably connected to the guide wheel via a bearing, for reciprocating along the axis of the reciprocating screw as the reciprocating screw rotates, thereby driving the guide wheel to move synchronously.

[0009] To better realize this utility model, a slide rod is further fixedly provided on the side of the mounting bracket. The axis of the slide rod is parallel to the axis of the reciprocating screw. The slide rod passes through the middle of the inner bearing of the guide wheel and through the slider. The slide rod and the slider are slidably connected to each other to limit the slider from rotating synchronously with the reciprocating screw and only allow the slider to move along the axis of the slide rod.

[0010] To better realize this utility model, the drive assembly further includes a belt, a motor, and two grooved pulleys; the two grooved pulleys are respectively fixedly sleeved on the end of the take-up roller and the end of the reciprocating screw, and the grooves of the two pulleys are compatible; the belt is tensioned and installed in the grooves of the two pulleys to realize the power transmission between the take-up roller and the reciprocating screw; the motor is fixedly installed on the side of the bracket away from the take-up roller, and the output shaft of the motor is drivenly connected to the end of the take-up roller to provide power for the rotation of the take-up roller.

[0011] To better realize this utility model, the groove opening of the guide wheel is further provided with a chamfer, which is a rounded chamfer or a 45°-60° bevel chamfer, to reduce frictional damage between the electrode wire and the edge of the groove opening of the guide wheel, and at the same time guide the electrode wire to smoothly enter the groove.

[0012] To better realize this utility model, the upper end face of the bracket is projected in a Z-shape on the horizontal plane. This Z-shaped structure is used to adapt to the internal space layout of the liquid storage tank, and at the same time, the conveying wheel and the take-up roller are respectively located at the preset positions at the bottom and top of the inside of the liquid storage tank, ensuring a smooth electrode wire conveying path.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects: (1) This utility model uses the gradual change in width of the annular groove of multiple conveying wheels to make the electrode wire gradually transition from the wide groove end away from the take-up roller to the narrow groove end close to the take-up roller. During the conveying process, the posture is naturally adjusted and the position of the guide wheel and the take-up roller is accurately matched, which effectively avoids the risk of electrode wire offset and separation caused by the fixed groove width. The rounded chamfer or 45°-60° bevel chamfer set at the opening of the guide wheel groove can guide the electrode wire to smoothly enter the groove, reduce the friction damage between the groove edge and the electrode wire, and further ensure the stability of the electrode wire conveying path. (2) This utility model adopts a drive assembly with a single motor, belt, and grooved wheel transmission. While the motor drives the take-up roller to rotate, the belt and two matching grooved wheels simultaneously drive the reciprocating screw of the adjustment assembly to rotate, thus achieving coordinated operation of "take-up roller winding" and "guide wheel reciprocating movement". This design does not require complex motor synchronization control logic, which not only reduces the complexity of equipment circuit design and failure rate, but also reduces the number of motors and reduces the overall energy consumption of the equipment. The belt and grooved wheel transmission structure can ensure a constant match between the take-up speed and the guide wheel movement speed, avoiding electrode wire tension fluctuations caused by speed deviation, and further improving processing stability. (3) The present invention designs the bracket as a Z-shaped structure with the horizontal projection of the upper end face, which can fully adapt to the inner space of the liquid storage tank: the bottom end of the bracket is located at the bottom of the inner side of the liquid storage tank and is used to install the conveyor wheel to avoid interference of the processing coolant on the conveyor wheel; one end of the bracket extends along the height direction of the liquid storage tank to its top and is used to install the take-up roller and adjustment components, so that the take-up roller is away from the coolant and prevents liquid from seeping in and affecting the life of the components. The Z-shaped structure makes the conveyor wheel and the take-up roller form a smooth path for low-position conveying and high-position winding. The electrode wire does not need to be bent excessively to complete the conveying, which reduces the bending stress and wear of the electrode wire, extends its service life, and improves the compactness of the overall structure of the equipment, saving installation space; (4) The parallel design of the slide bar and the reciprocating screw in the adjustment component of this utility model can form a double guide constraint on the slider. The reciprocating screw provides power to make the slider move along the axis, while the slide bar restricts the rotational freedom of the slider, ensuring that the slider only makes linear motion and avoiding the electrode wire guidance deviation caused by the rotation of the guide wheel. At the same time, the structure of the conveying wheel makes the electrode wire uniformly stressed during the conveying process, without local tension change, further ensuring the uniform winding of the electrode wire on the take-up roller, improving the moving accuracy of the guide wheel, and effectively avoiding the take-up jamming problem caused by the stacking of electrode wires. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective; Figure 3 This is a schematic diagram of the adjustment component in this utility model; Figure 4 This is a schematic diagram showing the disassembled structure of the drive component in this utility model; Figure 5 This is a cross-sectional view of the guide wheel in this utility model.

[0015] Wherein: 1—liquid storage tank, 2—bracket, 3—wind take-up roller, 4—mounting frame, 5—conveyor wheel, 6—reciprocating screw, 7—belt, 8—motor, 9—slider, 10—guide wheel, 11—slide bar, 12—grooving wheel, 13—chamfer. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0019] Example 1: The main structure of this embodiment is as follows: Figures 1-5 As shown, it includes a liquid storage tank 1, a support 2, a take-up roller 3, an adjustment assembly, and multiple conveyor wheels 5; The bracket 2 is installed inside the liquid storage tank 1, and one end of the bracket 2 extends along the height direction of the liquid storage tank 1 to the top of one end of the liquid storage tank 1, while the other end of the bracket 2 is located at the bottom of the inner side of the liquid storage tank 1. Multiple conveying wheels 5 are rotatably disposed at the other end of the bracket 2, and the width of the annular groove of the multiple conveying wheels 5 gradually increases along the direction from the end of the bracket 2 away from the take-up roller 3 to the end of the bracket 2 close to the take-up roller 3; The take-up roller 3 is rotatably mounted on the side of one end of the bracket 2 that extends above the liquid storage tank 1; A drive assembly is provided at the end of the take-up roller 3 and on the other side of the bracket 2 opposite to the take-up roller 3. The drive assembly is connected to the take-up roller 3 in a transmission manner. The adjustment component is installed on the side of the bracket 2 where the take-up roller 3 is located, and the adjustment component is associated with the drive component and the electrode wire drive respectively. The outer side of the adjustment component is connected to the guide wheel 10 through the bearing.

[0020] The specific implementation process is as follows: The bracket 2 is fixedly installed inside the liquid storage tank 1, ensuring that one end of the bracket 2 extends above the liquid storage tank 1 along its height direction, and the other end rests at the bottom of the liquid storage tank 1. Multiple conveying wheels 5 are rotatably installed at the bottom end of the bracket 2 via bearings, ensuring that the width of the annular groove of the conveying wheel 5 gradually increases in the direction away from and closer to the take-up roller 3. The take-up roller 3 is rotatably installed on the side of the bracket 2 extending above the liquid storage tank 1 via bearings. A drive assembly is installed on the other side of the bracket 2 away from the take-up roller 3, at the end of the take-up roller 3, ensuring that the drive assembly is connected to the output end of the take-up roller 3. An adjustment assembly is installed on the side of the bracket 2 where the take-up roller 3 is located, so that the input end of the adjustment assembly is linked with the drive assembly. At the same time, a guide wheel 10 is installed on the outside of the adjustment assembly via bearings, ensuring that the groove of the guide wheel 10 is aligned with the annular groove of the conveying wheel 5.

[0021] The drive assembly is activated, causing the take-up roller 3 to rotate around its own axis, generating a winding force on the electrode wire. The electrode wire is led out from the external wire feeding mechanism and first enters the conveying wheel 5 at the bottom of the bracket 2. The conveying direction is gradually adjusted along the annular groove with a gradually changing width, and then it enters the groove of the guide wheel 10. The drive assembly synchronously drives the adjustment assembly to run. The adjustment assembly drives the guide wheel 10 to move slowly along the length of the take-up roller 3, so that the electrode wire is evenly attached to the surface of the take-up roller 3, completing the coordination of stable wire take-up and cutting processing.

[0022] Example 2: This embodiment, based on the above embodiment, further defines the positional relationship of the conveyor wheels 5, such as... Figure 1 , Figure 2 As shown, multiple conveying wheels 5 are arranged at equal intervals along the direction from the end of the support 2 away from the take-up roller 3 to the end of the support 2 near the take-up roller 3, and the central axis of each conveying wheel 5 is collinear with the central axis of the take-up roller 3. The equidistant arrangement of the conveying wheels 5 ensures that the electrode wire is subjected to uniform force in the conveying path, avoiding sudden changes in local tension caused by uneven wheel spacing; and the collinearity between the conveying wheels 5 and the central axis of the take-up roller 3 ensures that the conveying direction of the electrode wire is always consistent with the tangential direction of the take-up roller 3, reducing frictional loss and positional displacement of the electrode wire during the turning process, and enhancing the anti-misalignment effect of the gradient groove width.

[0023] The specific implementation process is as follows: When installing the conveyor wheel 5 at the bottom end of the bracket 2, use a ruler or positioning tool to measure the distance between adjacent conveyor wheels 5 to ensure that the center distance of each conveyor wheel 5 is equal along the direction away from the take-up roller 3 and towards the take-up roller 3. Use a laser collimator to calibrate the central axis of the conveyor wheel 5 so that the central axis of all conveyor wheels 5 is on the same straight line in space as the central axis of the take-up roller 3. After calibration, fix the bearing seat of the conveyor wheel 5 to avoid subsequent displacement.

[0024] After the drive assembly is started, the electrode wires pass sequentially through the equidistantly arranged conveyor rollers 5. Due to the uniform roller spacing, the surface tension of the electrode wires remains stable, with no local stretching or loosening. At the same time, the collinear axes make the transition of the electrode wires from the conveyor rollers 5 to the guide rollers 10 smoother, allowing them to precisely conform to the surface of the take-up roller 3 when entering it, further reducing the risk of misalignment and separation. The other parts of this embodiment are the same as those in the above embodiments and will not be described again.

[0025] Example 3: This embodiment further defines the structure of the adjustment component based on the above embodiments, such as... Figure 3 As shown, the adjustment assembly includes a mounting bracket 4, a reciprocating lead screw 6, and a slider 9; The mounting bracket 4 is fixedly installed on the side of the bracket 2 where the take-up roller 3 is located; The reciprocating screw 6 is rotatably mounted on the mounting bracket 4 via bearings, and one end of the reciprocating screw 6 extends along its own axis to the other side of the bracket 2 away from the take-up roller 3, and is connected to the drive assembly for transmission. The slider 9 is threaded onto the outside of the reciprocating screw 6, and the outside of the slider 9 is rotatably connected to the guide wheel 10 via a bearing. When the drive assembly drives the reciprocating screw 6 to rotate, the helical groove of the reciprocating screw 6 and the internal thread of the slider 9 form a helical pair, converting the rotational motion into the linear reciprocating motion of the slider 9; and the slider 9 is connected to the guide wheel 10 by a bearing, which can drive the guide wheel 10 to move synchronously, achieving precise speed control and stable guidance, and avoiding electrode wire deviation caused by the movement of the adjustment assembly being stuck.

[0026] The specific implementation process is as follows: On one side of the bracket 2 where the take-up roller 3 is located, the mounting bracket 4 is fixed with bolts to ensure that the surface of the mounting bracket 4 is parallel to the axis of the take-up roller 3; bearing seats are installed at both ends of the mounting bracket 4, and the reciprocating screw 6 is passed through the inner ring of the bearing seat to allow the reciprocating screw 6 to rotate freely. At the same time, one end of the reciprocating screw 6 is extended to the other side of the bracket 2 away from the take-up roller 3 and fixedly connected to the power output end of the drive assembly; the inner thread of the slider 9 is engaged with the outer spiral groove of the reciprocating screw 6, and the bearing seat is welded or bolted to the outside of the slider 9. The guide wheel 10 is installed on the inner ring of the bearing seat to ensure that the guide wheel 10 can rotate flexibly.

[0027] After the drive assembly is started, power is transmitted to the reciprocating screw 6 through the transmission structure. The reciprocating screw 6 rotates at a speed of 50-100 r / min. Under the influence of the helical mechanism, the slider 9 moves linearly along the axis of the reciprocating screw 6. The movement speed matches the take-up speed of the take-up roller 3. For example, for every one revolution of the take-up roller 3, the slider 9 moves 0.5-1 mm. The slider 9 drives the guide wheel 10 to move synchronously, so that the electrode wire is evenly distributed on the take-up roller 3 as the guide wheel 10 moves. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0028] Example 4: This embodiment, based on the above embodiment, further adds a slide bar 11, such as... Figure 3 , Figure 4 As shown, a slide rod 11 is fixedly provided on the side of the mounting bracket 4, and the axial direction of the slide rod 11 is parallel to the axial direction of the reciprocating screw 6. The slide rod 11 passes through the middle of the inner bearing of the guide wheel 10 and through the slider 9, and the slide rod 11 and the slider 9 are slidably connected. The slide rod 11 is arranged parallel to the reciprocating screw 6 and passes through the slider 9, forming a double guide constraint. The reciprocating screw 6 provides power to move the slider 9, while the slide rod 11 restricts the rotational freedom of the slider 9 through the sliding fit, ensuring that the slider 9 only moves linearly along the axial direction, avoiding electrode wire guidance deviation caused by the rotation of the guide wheel 10, and at the same time enhancing the stability of the slider 9's movement and reducing vibration.

[0029] The specific implementation process is as follows: On the side of the mounting bracket 4, two slide rod 11 brackets are fixed with bolts. The two brackets are located at both ends of the reciprocating screw 6 and are parallel to the reciprocating screw 6. The slide rod 11 is passed through the positioning holes of the two brackets to ensure that the axis of the slide rod 11 is parallel to the axis of the reciprocating screw 6. Then, the two ends of the slide rod 11 are fixed to prevent loosening. A hole is drilled in the slider 9 of embodiment 3. The hole diameter is slightly larger than the diameter of the slide rod 11. After the slider 9 is passed through the slide rod 11, it is engaged with the reciprocating screw 6 to ensure that the slider 9 can slide smoothly along the slide rod 11.

[0030] When the drive assembly rotates the reciprocating screw 6, the slider 9, constrained by the slide rod 11, cannot rotate with the reciprocating screw 6 and only moves linearly in the direction jointly defined by the slide rod 11 and the reciprocating screw 6. The sliding engagement between the slide rod 11 and the slider 9 reduces the radial runout of the slider 9 during movement, making the movement trajectory of the guide wheel 10 straighter, and controlling the winding error of the electrode wire on the take-up roller 3 within ±0.01mm. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0031] Example 5: This embodiment, based on the above embodiments, further limits the structure of the driving component, such as... Figure 4 As shown, the drive assembly includes a belt 7, a motor 8, and two pulleys 12; The two grooved wheels 12 are respectively fixedly sleeved on the end of the take-up roller 3 and the end of the reciprocating screw 6, and the grooves of the two grooved wheels 12 are compatible. The belt 7 is tensioned and installed in the grooves of the two pulleys 12; The motor 8 is fixedly installed on the side of the bracket 2 opposite to the take-up roller 3, and the output shaft of the motor 8 is connected to the end of the take-up roller 3 for transmission. The motor 8 provides power to drive the take-up roller 3 to rotate. At the same time, the grooved wheel 12 at the end of the take-up roller 3 transmits power to the grooved wheel 12 at the end of the reciprocating screw 6 through the belt 7. Because the grooves of the two grooved wheels 12 are matched and the belt 7 is tensioned, the speed ratio between the take-up roller 3 and the reciprocating screw 6 can be kept constant, such as the speed of the take-up roller 3: speed of the reciprocating screw 6 = 5:1, so as to achieve precise matching between the take-up speed and the moving speed of the guide wheel 10, avoiding the complex control of multiple motors.

[0032] The specific implementation process is as follows: On the other side of the bracket 2 away from the take-up roller 3, the motor 8 is fixed by the motor 8 bracket, so that the output shaft of the motor 8 is aligned with the end of the take-up roller 3; one grooved wheel 12 is fixed to the end of the take-up roller 3 by key connection, and the other grooved wheel 12 is also fixed to the end of the reciprocating screw 6 extending to the outside of the bracket 2 by key connection, ensuring that the groove shape of the two grooved wheels 12 is consistent and the groove width matches the thickness of the belt 7; the belt 7 is fitted into the groove of the two grooved wheels 12, and the belt 7 is taut by adjusting the position of the motor 8 bracket or the tension of the grooved wheels 12.

[0033] When the power supply to motor 8 is turned on, the output shaft of motor 8 rotates at a speed of 100-200 r / min, driving the take-up roller 3 to rotate synchronously and begin winding the electrode wire. The grooved wheel 12 at the end of the take-up roller 3 rotates with it, and through the friction of belt 7, it drives the grooved wheel 12 at the end of the reciprocating screw 6 to rotate. Because belt 7 is taut and does not slip, the speed ratio of the two grooved wheels 12 is constant. The reciprocating screw 6 drives the slider 9 and the guide wheel 10 to move, realizing the synchronization of take-up and guidance, which can reduce energy consumption and avoid failures caused by motor synchronization errors. The other parts of this embodiment are the same as those in the above embodiment, and will not be described again.

[0034] Example 6: This embodiment further defines the structure of the guide wheel 10 based on the above embodiments, such as... Figure 5As shown, the guide wheel 10 has a chamfer 13 at the groove opening. The chamfer 13 is either a rounded chamfer or a 45°-60° bevel chamfer. The rounded chamfer or the 45°-60° bevel chamfer 13 can eliminate the sharp edge of the groove opening of the guide wheel 10. When the electrode wire enters the guide wheel 10 from the conveyor wheel 5, the chamfer 13 can act as a guide and buffer, preventing the sharp edge from scratching the surface of the electrode wire. At the same time, the chamfer 13 increases the receiving range of the groove opening, so even if there is a slight positional deviation of the electrode wire, it can slide smoothly into the groove, further reducing the risk of misalignment.

[0035] The specific implementation process is as follows: During the machining of the guide wheel 10, a lathe or grinding machine is used to chamfer the two sides of the groove opening: if a circular arc chamfer is selected, a circular arc surface with a radius of 0.5-1mm is machined by a circular arc cutting tool; if a bevel chamfer is selected, a bevel surface of 45°-60° is machined by an angle cutting tool to ensure that the chamfer 13 surface is smooth and burr-free; the machined guide wheel 10 is mounted on the outside of the slider 9 through a bearing to ensure that the chamfer 13 faces the conveyor wheel 5 side, so as to facilitate the entry of the electrode wire.

[0036] During machine operation, after the electrode wire is led out from the conveyor wheel 5, it first contacts the chamfer 13 of the guide wheel 10. Guided by the chamfer 13, it smoothly slides into the bottom of the groove without any jamming. At the same time, the smooth chamfer 13 avoids scratches on the surface of the electrode wire, extending its service life. Even if there is slight wobbling when the adjusting component moves the guide wheel 10, the receiving range of the chamfer 13 ensures that the electrode wire does not fall out of the groove, improving processing stability. The other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0037] Example 7: This embodiment further defines the structure of the support 2 based on the above embodiment, such as... Figures 1-3 As shown, the upper surface of the support 2 is projected onto a horizontal plane in a Z-shape. The Z-shaped structure allows the support 2 to be arranged in a staggered manner within the liquid storage tank 1. That is, the bottom part can accommodate multiple conveying wheels 5 to adapt to the space at the bottom of the inner side of the liquid storage tank 1; the upper extension can raise the take-up roller 3 above the liquid storage tank 1 to prevent the working fluid in the liquid storage tank 1 from splashing onto the take-up roller 3 and affecting the take-up effect; at the same time, compared with a straight support, the Z-shaped structure can reduce the overall length of the support 2, improve structural rigidity, and reduce vibration during machine tool operation.

[0038] The specific implementation process is as follows: When processing bracket 2, the steel plate is bent into a Z-shape using a bending machine to ensure that the projection of its upper end face on the horizontal plane is a standard Z-shape, and the radius of the rounded corner at the bend is 5-10mm to enhance the structural strength; the bottom part of the Z-shaped bracket 2 is fixed to the bottom of the inner side of the liquid storage tank 1 with bolts, and the upper extension part extends above one end of the liquid storage tank 1. The level of bracket 2 is calibrated with a level to ensure that the take-up roller 3 does not tilt after installation; the conveyor wheel 5 is installed at the bottom of bracket 2, and the take-up roller 3 is installed on the upper extension part.

[0039] During machine operation, the working fluid in the reservoir 1 is used to cool the cutting area. The varying heights of the Z-shaped support 2 keep the take-up roller 3 away from the working fluid, preventing it from seeping into the bearings or motor 8 of the take-up roller 3 and reducing malfunctions. Simultaneously, the rigidity of the Z-shaped structure reduces the vibration amplitude of the support 2 during the rotation of the take-up roller 3 to less than 0.1 mm, improving the cutting accuracy of the electrode wire and meeting precision machining requirements. Other parts of this embodiment are the same as those in the above embodiments and will not be repeated.

[0040] It is understood that the working principle and process of components such as the motor 8 and the conveyor wheel 5 in the slow wire cutting machine tool structure according to one embodiment of the present utility model are existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A slow wire EDM cutting machine tool, characterized in that, Includes a liquid storage tank (1), a support (2), a take-up roller (3), an adjustment assembly, and multiple conveyor wheels (5); The bracket (2) is installed inside the liquid storage tank (1), and one end of the bracket (2) extends along the height direction of the liquid storage tank (1) to the top of one end of the liquid storage tank (1), and the other end of the bracket (2) is located at the bottom of the inner side of the liquid storage tank (1). Multiple conveying wheels (5) are rotatably disposed at the other end of the bracket (2), and the width of the annular groove of the multiple conveying wheels (5) gradually increases along the direction from the end of the bracket (2) away from the take-up roller (3) to the end of the bracket (2) close to the take-up roller (3); The take-up roller (3) is rotatably mounted on the side of one end of the bracket (2) that extends above the liquid storage tank (1); A drive assembly is provided at the end of the take-up roller (3) and on the other side of the bracket (2) away from the take-up roller (3), and the drive assembly is connected to the take-up roller (3) in a transmission manner. The adjustment component is installed on the side of the bracket (2) where the take-up roller (3) is located, and the adjustment component is associated with the drive component and the electrode wire drive respectively. The outer side of the adjustment component is connected to the guide wheel (10) through the bearing.

2. The slow wire EDM cutting machine tool according to claim 1, characterized in that, The multiple conveying wheels (5) are arranged at equal intervals along the direction from the end of the support (2) away from the take-up roller (3) to the end of the support (2) near the take-up roller (3), and the central axis of each conveying wheel (5) is arranged collinearly with the central axis of the take-up roller (3).

3. A slow wire EDM machine tool according to claim 1 or 2, characterized in that, The adjustment assembly includes a mounting bracket (4), a reciprocating lead screw (6), and a slider (9). The mounting bracket (4) is fixedly installed on the side of the bracket (2) on the side where the take-up roller (3) is located; The reciprocating screw (6) is rotatably mounted on the mounting bracket (4) via bearings, and one end of the reciprocating screw (6) extends along its own axis to the other side of the bracket (2) away from the take-up roller (3) and is connected to the drive assembly for transmission. The slider (9) is threaded onto the outside of the reciprocating screw (6), and the outside of the slider (9) is rotatably connected to the guide wheel (10) through a bearing.

4. A slow wire EDM cutting machine tool according to claim 3, characterized in that, A slide rod (11) is fixedly provided on the side of the mounting bracket (4), and the axial direction of the slide rod (11) is parallel to the axial direction of the reciprocating screw (6). The slide rod (11) passes through the middle of the inner bearing of the guide wheel (10) and through the slider (9), and the slide rod (11) and the slider (9) are slidably connected.

5. A slow wire EDM machine tool according to claim 3, characterized in that, The drive assembly includes a belt (7), a motor (8), and two pulleys (12). The two grooved wheels (12) are respectively fixedly sleeved on the end of the take-up roller (3) and the end of the reciprocating screw (6), and the grooves of the two grooved wheels (12) are compatible. The belt (7) is tensioned and installed in the grooves of the two pulleys (12); The motor (8) is fixedly installed on the other side of the bracket (2) away from the take-up roller (3), and the output shaft of the motor (8) is connected to the end of the take-up roller (3) for transmission.

6. A slow wire EDM cutting machine tool according to claim 1, characterized in that, The guide wheel (10) has a chamfer (13) at the groove opening, and the chamfer (13) is a rounded chamfer or a 45°-60° bevel chamfer.

7. A slow wire EDM cutting machine tool according to claim 1, characterized in that, The upper surface of the bracket (2) is projected onto the horizontal plane in a Z-shape.

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