Electrode wire constant tension regulating device for wire cutting machine
Patent Information
- Application Number
- CN202522347527.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-05
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-05
AI Technical Summary
当电极丝张紧力适中时，切割速度最大，如果电极丝张紧力过大，电极丝超过弹性变形的限度，由于频繁的往复弯曲、摩擦，加上放电时遭受争热急冷变换的影响，可能发疲劳而造成断丝，当进行快走丝加工中，如果电极丝的张力过大，断丝往往发生在换向的瞬间，严重时即使空走也会断丝
[0013]当电极丝因快速走丝切割而使其受到的推力变大时，此时电极丝的张紧力变大，此时缠绕在该装置上的电极丝受力，电极丝通过定滑轮一能够拉动动滑轮一，使动滑轮一带动钢架一上的滑套在滑轨上进行滑动，从而使钢架一右端的受拉环拉动弹簧，使动滑轮一靠近定滑轮一使其间距变小，从而减少电极丝上的张紧力，使其张紧力适中，反之，当电极丝因慢速走丝切割而使其受到的推力减小时，此时电极丝的张紧力变小，缠绕在该装置上的电极丝受力，弹簧受到的拉力减小，弹簧为恢复形变而拉动钢架一上的受拉环，从而使钢架一向弹簧的方向运动，使动滑轮一远离定滑轮一使其间距变大，从而增大电极丝上的张紧力，使其张紧力适中；
Smart Images
Figure CN224866502U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wire cutting equipment technology, and in particular to a constant tension control device for electrode wire in a wire cutting machine. Background Technology
[0002] In wire EDM, a moving thin metal wire (copper or molybdenum wire) is used as an electrode to perform pulsed spark discharge cutting on the workpiece. The instantaneous high temperature of the electric spark can melt and oxidize the local metal of the workpiece, causing them to consume and corrode each other, thus cutting out a workpiece that meets the requirements. The vaporized working fluid and workpiece material vapor expand rapidly, thus subjecting the thin metal wire to a corresponding thrust, changing its tension. When the electrode wire tension is moderate, the cutting speed is maximum. If the electrode wire tension is too high, the electrode wire exceeds the limit of elastic deformation. Due to frequent reciprocating bending and friction, coupled with the effects of rapid heating and cooling during discharge, fatigue may occur, leading to wire breakage. In fast wire EDM, if the electrode wire tension is too high, wire breakage often occurs at the moment of reversal; in severe cases, wire breakage can occur even during idle running. However, if the electrode wire tension is too low, especially when cutting thicker workpieces, the electrode wire, due to its large span, will bend and deform under the discharge pressure during processing. As a result, the electrode wire's cutting trajectory will lag behind and deviate from the workpiece contour, causing electrode wire bending lag. This leads to shape and size errors, such as a drum-shaped cut when cutting a thick cylinder. In severe cases, the electrode wire may jump out of the guide wheel groove and break during rapid rotation. In particular, when the electrode wire reverses its cutting direction, the direction of the thrust it receives also changes, thus altering its internal tension. Therefore, the magnitude of the electrode wire tension has a significant impact on the amplitude of the electrode wire during operation and processing stability. Thus, it is necessary to invent a constant tension control device for the electrode wire in a wire EDM machine. Summary of the Invention
[0003] This invention provides a constant tension control device for electrode wire in wire EDM machines, which can ensure that the electrode wire tension is appropriate.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A constant tension control device for electrode wire of a wire EDM machine includes a coarse tension control device (100) and a fine tension control device (200). The coarse tension control device (100) includes a side plate (101), an execution component (110) is provided at the front end of the right side wall of the side plate (101), and a steel frame (120) is provided at the end of the right side wall of the side plate (101).
[0006] The execution component (110) includes a steel frame (111), a sliding sleeve (112) is fixedly installed on the side wall of the steel frame (111), the same movable pulley (113) is rotatably connected to the middle of the inner walls on both sides of the steel frame (111), and an initial roller (114) is fixedly installed at the rear end of the inner walls on both sides of the steel frame (111).
[0007] A slide rail (102) is fixedly installed on the front end of the right side wall of the side plate (101). The slide rail (102) is used in conjunction with the slide sleeve (112), and the steel frame (111) is slidably connected to the side plate (101). A tension ring (103) is fixedly installed on the front end of the right side wall of the side plate (101) and the front end of the inner walls on both sides of the steel frame (111). A spring (104) is provided between the two sets of tension rings (103), and the two ends of the spring (104) are respectively engaged with the two sets of tension rings (103).
[0008] Three sets of fixing columns (105) are fixedly installed at the end of the right side wall of the side plate (101).
[0009] Furthermore, the same steel frame 2 (120) is fixedly installed on the side wall of the three sets of fixed columns (105). The steel frame 2 (120) and the steel frame 1 (111) are located on the same horizontal plane. Fixed pulley 1 (121) is rotatably connected to the end of the inner wall on both sides of the steel frame 2 (120). Fixed pulley 2 (122) is rotatably connected to the front end of the inner wall on both sides of the steel frame 2 (120). Fixed pulley 2 (122) and movable pulley 1 (113) have the same wheel diameter and the same height.
[0010] Furthermore, the tension micro-adjustment device (200) includes a base plate (201), the top of the base plate (201) is provided with two sets of support seats (210) which are arranged flatly, the support seat (210) on the left side is fixedly connected to the base plate (201), the top of the base plate (201) is provided with a sliding groove (220), the support seat (210) on the right side is slidably connected to the sliding groove (220), the support seat (210) on the left side is rotatably connected with a rotating shaft (211), the front end of the rotating shaft (211) is fixedly installed with a screw (212), the screw (212) passes through the support seat (210) on the right side and meshes with the side wall of the support seat (210), the top of the base plate (201) is fixedly installed with a motor (213), the output shaft of the motor (213) is fixedly connected to the left end of the rotating shaft (211), and a connecting block (216) is slidably connected to the rotating shaft (211).
[0011] Furthermore, the top of each of the two sets of support seats (210) is rotatably connected to a connecting rod (214), and the two sets of connecting rods (214) are arranged in parallel. The support seat (210) provides support for the connecting rod (214). The top of the two sets of connecting rods (214) is rotatably connected to the same connecting seat (215). The connecting rod (214) limits the movement of the connecting seat (215). The side wall of the connecting block (216) is rotatably connected to a connecting rod (217). The other end of the connecting rod (217) is rotatably connected to the front side wall of the connecting seat (215). The middle side wall of the connecting seat (215) is rotatably connected to a movable pulley (218), and the side wall of the side plate (101) is rotatably connected to a fixed pulley (219).
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] When the electrode wire experiences increased thrust due to rapid wire cutting, its tension also increases. The electrode wire wound around the device is under stress, and through a fixed pulley, it pulls a movable pulley. This movable pulley causes a sleeve on the steel frame to slide on a rail, pulling the spring at the right end of the steel frame. This brings the movable pulley closer to the fixed pulley, reducing the distance and thus decreasing the tension on the electrode wire, making it moderate. Conversely, when the electrode wire experiences decreased thrust due to slow wire cutting, its tension decreases. The electrode wire wound around the device is under stress, and the spring experiences less tension. To recover its deformation, the spring pulls the tension ring on the steel frame, causing the steel frame to move towards the spring. This moves the movable pulley away from the fixed pulley, increasing the distance and thus increasing the tension on the electrode wire, making it moderate.
[0014] When the electrode wire reverses its cutting direction, the direction of the thrust it experiences also changes accordingly, thus altering its internal tension. At this point, the drive motor is controlled based on the change in the electrode wire's cutting angle. This causes the motor's output shaft to rotate, engaging the screw at the front of the shaft with the support base. This changes the position of the connecting block, causing the connecting rod on the connecting block to rotate. This, in turn, causes the two sets of connecting rods to rotate synchronously with the connecting base, changing the position of the movable pulley. This alters the distance between the movable pulley and the fixed pulley and the incident angle of the electrode wire, adapting to the change in tension caused by the change in the cutting direction. This ensures that the internal tension of the electrode wire is appropriate. Attached Figure Description
[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0016] Figure 1 A schematic diagram of the connection structure of the electrode wire provided in this patent;
[0017] Figure 2 This is a schematic diagram of the device provided for this patent;
[0018] Figure 3 A schematic diagram of the structure of the execution component provided in this patent;
[0019] Figure 4 A schematic diagram of the tension micro-adjustment device provided for this patent.
[0020] Explanation of reference numerals in the attached figures:
[0021] In the diagram: 100, Coarse tension control device; 101, Side plate; 102, Slide rail; 103, Tension ring; 104, Spring; 105, Fixed column; 110, Actuating assembly; 111, Steel frame one; 112, Sliding sleeve; 113, Moving pulley one; 114, Initial roller; 120, Steel frame two; 121, Fixed pulley one; 122, Fixed pulley two; 200, Fine tension control device; 201, Base plate; 210, Support seat; 211, Rotating shaft; 212, Screw; 213, Motor; 214, Connecting rod one; 215, Connecting seat; 216, Connecting block; 217, Connecting rod two; 218, Moving pulley two; 219, Fixed pulley three. Detailed Implementation
[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0023] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:
[0024] like Figures 1-4 As shown, the present invention provides a constant tension control device for electrode wire of wire cutting machine, including a coarse tension control device 100 and a fine tension control device 200. The coarse tension control device 100 includes a side plate 101, an execution component 110 is provided at the front end of the right side wall of the side plate 101, and a steel frame 120 is provided at the end of the right side wall of the side plate 101.
[0025] The execution component 110 includes a steel frame 111, a sliding sleeve 112 fixedly installed on the side wall of the steel frame 111, a movable pulley 113 rotatably connected to the middle of the inner walls on both sides of the steel frame 111, and an initial roller 114 fixedly installed at the rear end of the inner walls on both sides of the steel frame 111.
[0026] A slide rail 102 is fixedly installed on the front end of the right side wall of the side plate 101. The slide rail 102 is used in conjunction with the slide sleeve 112 and the steel frame 111 is slidably connected to the side plate 101. Tension rings 103 are fixedly installed on the front end of the right side wall of the side plate 101 and the front end of the inner walls on both sides of the steel frame 111. A spring 104 is provided between the two sets of tension rings 103. The two ends of the spring 104 are respectively engaged with the two sets of tension rings 103.
[0027] Three sets of fixing posts 105 are fixedly installed at the end of the right side wall of the side plate 101.
[0028] Furthermore, the same steel frame 120 is fixedly installed on the side wall of the three sets of fixed columns 105. The steel frame 120 and the steel frame 111 are located on the same horizontal plane. Fixed pulleys 121 are rotatably connected to the ends of the inner walls on both sides of the steel frame 120, and fixed pulleys 122 are rotatably connected to the front ends of the inner walls on both sides of the steel frame 120. The fixed pulleys 122 and the movable pulleys 113 have the same diameter and the same height. Specifically, when the electrode wire experiences a greater thrust due to rapid wire cutting, the tension of the electrode wire increases. At this time, the electrode wire wound on the device is under force, and the electrode wire can pull the movable pulley 113 through the fixed pulleys 121, so that the movable pulleys 113 drive the sliding sleeve 112 on the steel frame 111 to slide on the slide rail 10. The steel frame 111 slides on the steel frame 111, causing the tension ring 103 at the right end of the steel frame 111 to pull the spring 104, making the movable pulley 113 closer to the fixed pulley 121 and reducing the distance between them. This reduces the tension on the electrode wire and makes the tension moderate. When the pushing force on the electrode wire decreases due to slow wire cutting, the tension on the electrode wire decreases. The electrode wire wound on the device is under force, and the tension on the spring 104 decreases. In order to restore its deformation, the spring 104 pulls the tension ring 103 on the steel frame 111, causing the steel frame 111 to move towards the spring 104. This moves the movable pulley 113 away from the fixed pulley 121 and increases the distance between them, thereby increasing the tension on the electrode wire and making the tension moderate.
[0029] Furthermore, the tension micro-adjustment device 200 includes a base plate 201. The top of the base plate 201 is provided with two sets of support seats 210, which are arranged flush. The support seat 210 on the left side is fixedly connected to the base plate 201. A sliding groove 220 is opened on the top of the base plate 201. The support seat 210 on the right side is slidably connected to the sliding groove 220. A rotating shaft 211 is rotatably connected to the support seat 210 on the left side. A screw 212 is fixedly installed at the front end of the rotating shaft 211. The screw 212 passes through the support seat 210 on the right side and meshes with the side wall of the support seat 210. A motor 213 is fixedly installed on the top of the base plate 201. The output shaft of the motor 213 is fixedly connected to the left end of the rotating shaft 211. A connecting block 216 is slidably connected to the rotating shaft 211.
[0030] Furthermore, each of the two sets of support seats 210 is rotatably connected to a connecting rod 214, and the two sets of connecting rods 214 are arranged in parallel. The support seats 210 provide support for the connecting rods 214. The tops of the two sets of connecting rods 214 are rotatably connected to the same connecting seat 215. The connecting rods 214 limit the movement of the connecting seat 215. The side wall of the connecting block 216 is rotatably connected to a connecting rod 217. The other end of the connecting rod 217 is rotatably connected to the front side wall of the connecting seat 215. The middle side wall of the connecting seat 215 is rotatably connected to a movable pulley 218, and the side wall of the side plate 101 is rotatably connected to a fixed pulley 219. Specifically, when the electrode wire is reversing its cutting direction, the direction of the thrust it receives also changes synchronously due to the change in the cutting direction of the electrode wire, thus changing the tension inside it. At this time, it is only necessary to control the movement based on the change in the cutting angle of the electrode wire. The drive motor 213 is controlled, causing the output shaft of the motor 213 to drive the rotating shaft 211 to rotate. This causes the screw 212 at the front end of the rotating shaft 211 to engage with the support seat 210 on the right side, allowing the support seat 210 to slide within the slide groove 220. Under the limiting action of the rotating shaft 211, the connecting block 216 slides on the rotating shaft 211, thereby changing the position of the connecting block 216. This causes the connecting rod 217 on the connecting block 216 to rotate, thereby causing the two sets of connecting rods 214 to drive the connecting seat 215 to rotate synchronously. This changes the position of the movable pulley 218, altering the distance between the movable pulley 218 and the fixed pulley 219 and the incident angle of the electrode wire. This allows the electrode wire to adapt to the change in tension caused by the change in the cutting direction, thus ensuring that the internal tension of the electrode wire is moderate.
[0031] The usage process is as follows: After the technician passes the electrode wire to be used through the initial roller 114, they follow the instructions attached to the manual. Figure 1 The connection is made in the same way as in the process. After the connection is completed, the electrode wire is led out for wire cutting. When wire cutting is performed, the vaporized working fluid and the workpiece material vapor expand rapidly, which causes the electrode wire to be subjected to a corresponding thrust, thus changing its tension.
[0032] When the electrode wire experiences increased thrust due to rapid wire cutting, the tension of the electrode wire also increases. At this time, the electrode wire wound around the device is under stress, and the electrode wire can pull the movable pulley 113 through the fixed pulley 121. The movable pulley 113 drives the sliding sleeve 112 on the steel frame 111 to slide on the slide rail 102, thereby causing the tension ring 103 at the right end of the steel frame 111 to pull the spring 104, making the movable pulley 113 closer to the fixed pulley 121, thus reducing the distance between them and reducing the tension on the electrode wire to a moderate level.
[0033] When the thrust on the electrode wire decreases due to slow wire cutting, the tension of the electrode wire decreases, the electrode wire wound on the device is stressed, the tension on the spring 104 decreases, and the spring 104 pulls the tension ring 103 on the steel frame 111 to restore its deformation, thereby causing the steel frame 111 to move towards the spring 104, making the movable pulley 113 move away from the fixed pulley 121 and increase the distance between them, thereby increasing the tension on the electrode wire and making its tension moderate.
[0034] Specifically, when the electrode wire reverses its cutting direction, the direction of the thrust it experiences also changes accordingly, thus altering the internal tension. At this point, the drive motor 213 is controlled based on the change in the electrode wire's cutting angle, causing the motor 213's output shaft to drive the rotating shaft 211 to rotate. This allows the screw 212 at the front end of the rotating shaft 211 to engage with the right-side support seat 210, causing the right-side support seat 210 to slide within the groove 220. Under the limiting action of the rotating shaft 211, the... The connecting block 216 slides on the rotating shaft 211, thereby changing the position of the connecting block 216 and causing the connecting rod 217 on the connecting block 216 to rotate. This causes the two sets of connecting rods 214 to drive the connecting seat 215 to rotate synchronously, thereby changing the position of the movable pulley 218. This changes the distance between the movable pulley 218 and the fixed pulley 219 and the incident angle of the electrode wire, so as to adapt to the change in the tension of the electrode wire due to the change in the cutting direction, thereby making the internal tension of the electrode wire moderate.
[0035] The preferred embodiments of this utility model have been described in detail above with reference to the accompanying drawings. However, this utility model is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this utility model, various simple modifications can be made to the technical solution of this utility model, and these simple modifications all fall within the protection scope of this utility model. It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately. Furthermore, various different embodiments of this utility model can also be arbitrarily combined, as long as they do not violate the spirit of this utility model, they should also be considered as the content disclosed by this utility model.
Claims
1. A constant tension control device for electrode wire in a wire EDM machine, characterized in that, It includes a coarse tension control device (100) and a fine tension control device (200). The coarse tension control device (100) includes a side plate (101), an actuator (110) is provided at the front end of the right side wall of the side plate (101), and a steel frame (120) is provided at the end of the right side wall of the side plate (101). The execution component (110) includes a steel frame (111), a sliding sleeve (112) is fixedly installed on the side wall of the steel frame (111), the same movable pulley (113) is rotatably connected to the middle of the inner walls on both sides of the steel frame (111), and an initial roller (114) is fixedly installed at the rear end of the inner walls on both sides of the steel frame (111). A slide rail (102) is fixedly installed on the front end of the right side wall of the side plate (101). The slide rail (102) is used in conjunction with the slide sleeve (112), and the steel frame (111) is slidably connected to the side plate (101). A tension ring (103) is fixedly installed on the front end of the right side wall of the side plate (101) and the front end of the inner walls on both sides of the steel frame (111). A spring (104) is provided between the two sets of tension rings (103), and the two ends of the spring (104) are respectively engaged with the two sets of tension rings (103). Three sets of fixing columns (105) are fixedly installed at the end of the right side wall of the side plate (101).
2. The electrode wire constant tension control device for a wire EDM machine according to claim 1, characterized in that, The same steel frame 2 (120) is fixedly installed on the side wall of the three sets of fixed columns (105). The steel frame 2 (120) and the steel frame 1 (111) are located on the same horizontal plane. Fixed pulley 1 (121) is rotatably connected to the end of the inner wall on both sides of the steel frame 2 (120). Fixed pulley 2 (122) is rotatably connected to the front end of the inner wall on both sides of the steel frame 2 (120). Fixed pulley 2 (122) and movable pulley 1 (113) have the same wheel diameter and the same height.
3. The electrode wire constant tension control device for a wire EDM machine according to claim 1, characterized in that, The tension micro-adjustment device (200) includes a base plate (201). The top of the base plate (201) is provided with two sets of support seats (210) which are arranged flat. The support seat (210) on the left side is fixedly connected to the base plate (201). The top of the base plate (201) is provided with a sliding groove (220). The support seat (210) on the right side is slidably connected to the sliding groove (220). A rotating shaft (211) is rotatably connected to the support seat (210) on the left side. A screw (212) is fixedly installed at the front end of the rotating shaft (211). The screw (212) passes through the support seat (210) on the right side and meshes with the side wall of the support seat (210). A motor (213) is fixedly installed on the top of the base plate (201). The output shaft of the motor (213) is fixedly connected to the left end of the rotating shaft (211). A connecting block (216) is slidably connected to the rotating shaft (211).
4. The electrode wire constant tension control device for a wire EDM machine according to claim 3, characterized in that, Both sets of support seats (210) are rotatably connected to the top of the first connecting rod (214), and the two sets of first connecting rods (214) are arranged in parallel. The support seat (210) provides support for the first connecting rod (214). The top of the two sets of first connecting rods (214) is rotatably connected to the same connecting seat (215). The first connecting rod (214) limits the movement of the connecting seat (215). The side wall of the connecting block (216) is rotatably connected to the second connecting rod (217). The other end of the second connecting rod (217) is rotatably connected to the front side wall of the connecting seat (215). The middle side wall of the connecting seat (215) is rotatably connected to the second movable pulley (218). The side wall of the side plate (101) is rotatably connected to the third fixed pulley (219).