A spring bending device

Abstract

The present invention relates to the field of spring processing technology, and in particular to a spring bending device, comprising a table and a bearing seat, wherein a main shaft is rotatably inserted inside the bearing seat, a sleeve shaft is fixed to the outer end of the main shaft, a centering shaft is installed at one end of the sleeve shaft, a rotating rod is fixed to one side of the sleeve shaft, one end of the rotating rod is rotatably connected to a driven wheel, and a wire guide is provided on the upper side of the table; the device also comprises a motor for driving the main shaft to rotate, the motor being connected to the main shaft through a transmission structure; the device also comprises an angle limiting mechanism; the angle limiting mechanism comprises a vertical plate fixed to the upper side of the table, a driven shaft is rotatably connected to the interior of the vertical plate, and a stop rod is fixed to one end of the driven shaft. The present invention can set the required bending angle in advance through the angle limiting mechanism, and when the driven wheel drives the steel bar to bend to the adjusted angle, the motor can be instantly controlled to stop, thereby instantly stopping the thrust applied to the steel bar, thereby further improving the accuracy of the steel bar bending angle.

Description

Technical Field

[0001] The present invention relates to the technical field of spring processing, in particular to a spring bending device. Background Art

[0002] Springs are one of the most commonly used parts in mechanical equipment. During processing, springs are processed by using a spring coiling machine to process steel bars into a spiral shape. Before the steel bars are processed by the spring coiling machine, the two ends of the steel bars need to be bent to a specified angle through a bending mechanism to facilitate the installation or connection of the springs.

[0003] After searching, the Chinese patent with publication number CN208495666U discloses a double curling device on a spring machine, including a curling head, a bending cutter head, a turntable, and a driving device. The driving device can drive the curling head to rotate in the middle of the turntable. The curling head is provided with a rotating groove for accommodating the wire. The bending cutter heads are provided in two groups and are respectively arranged around the curling head on the turntable. The turntable drives the bending cutter heads to rotate around the curling head under the drive of the driving device.

[0004] Based on the above search and combined with actual problems, it was found that although this method of bending by twisting the spring steel bar has a high bending efficiency, it is not easy to accurately control the bending angle each time. In mass production, the bending angle of each spring steel bar will be inconsistent, thereby reducing the processing accuracy of the spring. In mechanical equipment with high requirements for spring precision, it will make the spring difficult to disassemble and assemble. Summary of the Invention

[0005] The object of the present invention is to provide a spring bending device to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a spring bending device, comprising a table plate and a bearing seat, a main shaft is rotatably inserted in the bearing seat, and a sleeve shaft is fixed on the outer side of the main shaft, and a centering shaft is installed at one end of the sleeve shaft. A rotating rod is fixed on one side of the sleeve shaft, and one end of the rotating rod is rotatably connected to a driven wheel, and a wire plate is provided on the upper side of the table plate; it also includes a motor that drives the main shaft to rotate, and the motor is connected to the main shaft through a transmission structure; it also includes an angle limiting mechanism; the angle limiting mechanism includes a vertical plate fixed on the upper side of the table plate, a driven shaft is rotatably connected to the inside of the vertical plate, one end of the driven shaft is fixed with a stop rod, and the other end of the driven shaft is fixed with a driven rod, and one end of the driven rod is movably provided with two positioning wheels, one side of the vertical plate can be adjusted and rotatably connected to a worm gear arranged concentrically with the driven shaft, a stop block is fixed on one side of the worm gear, and a micro switch is provided on one side of the stop block, and the micro switch is electrically connected to the motor through a control circuit, and a check mechanism is provided between the driven shaft and the vertical plate to prevent the driven shaft from reversing.

[0007] Preferably, one end of each of the two positioning wheels is fixed with a wheel axle, the two wheel axles are movably inserted into the interior of the driven rod, and the outer sides of the two wheel axles are rotatably connected to an axle frame.

[0008] Preferably, a support hole is provided at one end of the centering shaft, and one end of the driven shaft is rotatably inserted into the inner side of the support hole.

[0009] Preferably, an angle ruler is provided on one side of the vertical plate at an outer position of the worm gear, and a pointer is provided on one end of the stopper.

[0010] Preferably, one side of the vertical plate is rotatably connected to a worm, and the worm is engaged with the worm wheel.

[0011] Preferably, the transmission structure includes a driven pulley fixed to one end of the main shaft and a driving pulley installed at the motor drive end, and the driving pulley and the driven pulley are connected by a belt transmission.

[0012] Preferably, a height adjustment mechanism is provided between the wire board and the table, and the height adjustment mechanism includes two fixing frames fixed on the upper side of the table and a slider fixed on one side of the wire board. A lifting plate is fixed on one side of the two fixing frames, and a sliding groove is provided inside the lifting plate. The inner side of the sliding groove is rotatably connected to a screw, the slider is slidably connected to the inner side of the sliding groove, and the screw is threadedly connected to the inner side of the slider.

[0013] Preferably, the check mechanism includes a first gear fixed to the outside of the driven shaft and a stop column fixed to one side of the vertical plate, a stop shaft is rotatably inserted into one end of the stop column, a second gear meshing with the first gear is fixed to one end of the stop shaft, a circular groove is also provided at one end of the stop column, a plurality of locking teeth are evenly arranged on the inner side of the circular groove, a plurality of stop push rods are rotatably connected to the outer side of the stop shaft, one side of each stop push rod is elastically connected to the outer side of the stop shaft through a spring sheet, and the diameter of the first gear is larger than the diameter of the second gear.

[0014] Preferably, a flange is fixed to one end of the centering shaft, and the flange is fixed to one end of the sleeve shaft by bolts.

[0015] Preferably, a guide groove is provided on the upper side of the wire guide.

[0016] The present invention provides a spring bending device through improvement, which has the following improvements and advantages compared with the prior art:

[0017] First: The present invention drives the sleeve shaft to rotate through the main shaft, and the sleeve shaft drives the moving wheel to rotate through the rotating rod. The moving wheel applies thrust to the steel bar to bend the steel bar, and under the action of the centering shaft, the bent section of the steel bar forms a circular arc that matches the outer side of the centering shaft, so that the end of the spring steel bar can be quickly and accurately bent. At the same time, the required bending angle can be set in advance through the angle limiting mechanism. When the moving wheel drives the steel bar to bend to the adjusted angle, the motor can be instantly controlled to stop, so that the thrust applied to the steel bar can be instantly stopped, thereby further improving the accuracy of the steel bar bending angle.

[0018] Secondly, the present invention uses a non-return mechanism. When the steel bar is bent to a specified angle, there is rebound stress inside the steel bar. The rebound stress acts on a positioning wheel located outside the bending section of the steel bar, and is then transmitted to the driven shaft through the wheel axle and the driven rod, thereby applying a reverse rotational torque to the driven shaft. The one-way locking effect of the stop push rod and the locking tooth in the non-return mechanism prevents the stop shaft from rotating in the reverse direction, thereby achieving the goal of making the stop shaft rotate only in one direction relative to the stop column, and thus making the driven shaft rotate only in one direction. When the steel bar is bent, it can maintain pressure on the steel bar to prevent the spring steel bar that has just been bent from rebounding, thereby further improving the accuracy of the bending angle of the spring steel bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention from a first perspective;

[0021] Figure 2 This is a schematic diagram of the structure from a second viewing angle of the present invention;

[0022] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 This is a schematic diagram of the partially disassembled structure of the centering shaft and the driven shaft in the present invention;

[0024] Figure 5 Schematic diagram of the front view of the angle limiting mechanism of the present invention;

[0025] Figure 6 This is a schematic structural diagram of the present invention from a third viewing angle;

[0026] Figure 7It is a partially enlarged structural schematic diagram of the non-return mechanism in the present invention.

[0027] Reference numerals:

[0028] 1. Table; 2. Bearing seat; 3. Spindle; 4. Sleeve shaft; 5. Centering shaft; 6. Rotating rod; 7. Driven pulley; 8. Wire guide; 9. Guide groove; 10. Flange; 11. Motor; 12. Driving pulley; 13. Driven pulley; 101. Vertical plate; 102. Driven shaft; 103. Worm gear; 104. Stopper; 105. Stopper lever; 106. Micro switch; 107. Driven lever; 108. Positioning wheel; 109 , axle; 110, axle frame; 111, angle ruler; 112, pointer; 113, worm; 114, support hole; 201, stop column; 202, first gear; 203, stop shaft; 204, second gear; 205, circular groove; 206, locking tooth; 207, stop push rod; 208, spring; 301, lifting plate; 302, slide groove; 303, slider; 304, screw; 305, fixing frame. DETAILED DESCRIPTION

[0029] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] The present invention provides a spring bending device through improvement. The technical solution of the present invention is:

[0031] like Figures 1 to 7 As shown, the embodiment of the present invention provides a spring bending device, including a table 1 and a bearing seat 2, a main shaft 3 is rotatably inserted inside the bearing seat 2, a sleeve shaft 4 is fixed to one end of the outer side of the main shaft 3, a centering shaft 5 is installed at one end of the sleeve shaft 4, a rotating rod 6 is fixed to one side of the sleeve shaft 4, and a moving wheel 7 is rotatably connected to one end of the rotating rod 6, a guide plate 8 is provided on the upper side of the table 1, and a guide groove 9 is opened on the upper side of the guide plate 8 (as shown in FIG. Figure 6As shown); it also includes a motor 11 that drives the main shaft 3 to rotate, and the motor 11 is connected to the main shaft 3 through a transmission structure; it also includes an angle limiting mechanism; the angle limiting mechanism includes a vertical plate 101 fixed on the upper side of the table 1, and a driven shaft 102 is rotatably connected to the interior of the vertical plate 101, one end of the driven shaft 102 is fixed with a stop rod 105, and the other end of the driven shaft 102 is fixed with a driven rod 107, one end of the driven rod 107 is movably provided with two positioning wheels 108, and one side of the vertical plate 101 is adjustable The joint is connected to a worm gear 103 which is arranged concentrically with the driven shaft 102. A stopper 104 is fixed to one side of the worm gear 103. A micro switch 106 is provided on one side of the stopper 104. The micro switch 106 is electrically connected to the motor 11 through a control circuit. An angle ruler 111 is provided on one side of the vertical plate 101 at the outer side of the worm gear 103. A pointer 112 is provided at one end of the stopper 104. A non-return mechanism is provided between the driven shaft 102 and the vertical plate 101 to prevent the driven shaft 102 from reversing.

[0032] Furthermore, one end of each of the two positioning wheels 108 is fixed with a wheel axle 109, and both wheel axles 109 are movably inserted into the interior of the driven rod 107, and the outer sides of the two wheel axles 109 are rotatably connected to a wheel axle frame 110;

[0033] The axle frame 110 keeps the two axles 109 parallel. The two axles 109 can rotate inside the driven rod 107, or slide straightly along the inside of the driven rod 107 while rotating. When the steel bar is bent at a certain angle, the steel bar drives the driven rod 107 to rotate an equal angle through the two positioning wheels 108 and the two axles 109. Before removing the bent steel bar, slide the two axles 109 to one end, so that the two positioning wheels 108 can be separated from both sides of the steel bar, making it easier to remove the bent steel bar.

[0034] Furthermore, a support hole 114 is formed at one end of the centering shaft 5, and one end of the driven shaft 102 is rotatably inserted into the inner side of the support hole 114;

[0035] One end of the driven shaft 102 can be supported by the support hole 114, while the driven shaft 102 and the centering shaft 5 maintain a completely coaxial positional relationship, so that the rotation angle of the driven shaft 102 and the driven rod 107 and the bending angle of the steel bar have smaller errors, thereby further improving the accuracy of the bending angle of the steel bar.

[0036] Furthermore, a worm 113 is rotatably connected to one side of the vertical plate 101, and the worm 113 is engaged with the worm wheel 103;

[0037] The worm 113 in the rotation angle limiting mechanism drives the worm gear 103 to rotate, the worm gear 103 drives the stopper 104 to rotate, and the stopper 104 drives the pointer 112 to rotate. The pointer 112 can indicate different angle scale lines on the upper side of the angle ruler 111, so that the pointer 112 indicates the angle scale required for bending, so that the steel bar can be bent to the specified angle.

[0038] Furthermore, the transmission structure includes a driven pulley 13 fixed to one end of the main shaft 3 and a driving pulley 12 installed at the driving end of the motor 11, and the driving pulley 12 and the driven pulley 13 are connected by a belt transmission;

[0039] The operation of the motor 11 drives the driving pulley 12 to rotate, and the driving pulley 12 drives the driven pulley 13 to rotate through the belt, and the driven pulley 13 drives the main shaft 3 to rotate, thereby driving the sleeve shaft 4 to rotate, thereby realizing bending of the steel bar.

[0040] Furthermore, a height adjustment mechanism is provided between the wire plate 8 and the table 1. The height adjustment mechanism includes two fixing brackets 305 fixed on the upper side of the table 1 and a slider 303 fixed on one side of the wire plate 8 (such as Figure 6 As shown), a lifting plate 301 is fixed to one side of the two fixing frames 305, and a sliding groove 302 is opened inside the lifting plate 301. The inner side of the sliding groove 302 is rotatably connected to the screw 304. The slider 303 is slidably connected to the inner side of the sliding groove 302, and the screw 304 is threadedly connected to the inner side of the slider 303;

[0041] By rotating the screw 304 of the height adjustment mechanism, the screw 304 drives the slider 303 to move up and down on the inner side of the slide groove 302 through the thread, and the slider 303 drives the wire plate 8 to move up and down, so that the height of the wire plate 8 and the guide groove 9 can be adjusted. When the steel bar is placed on the inner side of the guide groove 9, the height of the wire plate 8 and the guide groove 9 is adjusted so that the outer side of the steel bar just contacts the outer side of the centering shaft 5, so that the end of the steel bar can just pass through between the two positioning wheels 108. Therefore, when bending, the bent section of the steel bar can be better adapted to the outer side of the centering shaft 5, further improving the accuracy of the bending angle.

[0042] Furthermore, the backstop mechanism includes a first gear 202 fixed to the outside of the driven shaft 102, a stop post 201 fixed to one side of the vertical plate 101, a stop shaft 203 is rotatably inserted at one end of the stop post 201, a second gear 204 meshing with the first gear 202 is fixed at one end of the stop shaft 203, and a circular groove 205 is further provided at one end of the stop post 201 (such as Figure 7As shown, a plurality of locking teeth 206 are evenly arranged on the inner side of the circular groove 205, and a plurality of stop push rods 207 are rotatably connected to the outer side of the stop shaft 203. One side of each stop push rod 207 is elastically connected to the outer side of the stop shaft 203 via a spring piece 208. The diameter of the first gear 202 is larger than the diameter of the second gear 204.

[0043] Through the non-return mechanism, when the steel bar is bent to a specified angle, there is rebound stress inside it, and the rebound stress will act on a positioning wheel 108 located on the outside of the bending section of the steel bar, and then be transmitted to the driven shaft 102 through the wheel shaft 109 and the driven rod 107, thereby applying a reverse rotational torque to the driven shaft 102. Through the one-way locking effect of the stop push rod 207 and the locking tooth 206 in the non-return mechanism, the stop shaft 203 cannot rotate in the reverse direction, so that the stop shaft 203 can only rotate in one direction relative to the stop column 201, and therefore the driven shaft 102 can only rotate in one direction. When the steel bar is bent, it can maintain pressure on the steel bar to prevent the spring steel bar that has just been bent from rebounding, thereby further improving the accuracy of the bending angle of the spring steel bar.

[0044] Furthermore, a flange 10 is fixed to one end of the centering shaft 5, and the flange 10 is fixed to one end of the sleeve shaft 4 by bolts;

[0045] By disassembling the flange 10, the centering shaft 5 and the sleeve shaft 4 can be disassembled and assembled, thereby facilitating the replacement of the centering shaft 5 with different diameters, and thus the steel bar can be bent into different curvatures as needed.

[0046] Working principle: Before use, rotate the driven shaft 102 in the angle limiting mechanism, and the driven shaft 102 drives the driven rod 107 and the two positioning wheels 108 to rotate, so that the driven rod 107 rotates to a horizontal angle, thereby making the two positioning wheels 108 vertically arranged upward and downward. When in use, place the steel bar used to make the spring inside the guide groove 9 on the upper side of the wire plate 8, and pass one end of the steel bar between the two positioning wheels 108, as shown in FIG. Figure 1 As shown, the two positioning wheels 108 are respectively attached to the two sides of the steel bar, and then the motor 11 is controlled to operate, the motor 11 drives the active pulley 12 to rotate, the active pulley 12 drives the driven pulley 13 to rotate through the belt, thereby driving the main shaft 3 to rotate, the main shaft 3 drives the sleeve shaft 4 to rotate, the sleeve shaft 4 drives the rotating rod 6 to rotate, and the rotating rod 6 drives the driving wheel 7 to rotate around the axis of the main shaft 3. At the same time, when the driving wheel 7 rotates, it applies thrust to the steel bar from the bottom side to bend the steel bar. Under the shaping effect of the centering shaft 5, the bent section of the steel bar is attached to the outer side of the centering shaft 5, so that the steel bar is bent to a curvature equal to that of the centering shaft 5.

[0047] For springs of different types, their ends need to be bent into different angles. When a specified angle needs to be bent, the worm 113 in the angle limiting mechanism is first rotated. The worm 113 drives the worm wheel 103 to rotate, and the worm wheel 103 drives the stopper 104 to rotate. The stopper 104 drives the pointer 112 to rotate. The pointer 112 can indicate different angle scales on the upper side of the angle ruler 111, so that the pointer 112 indicates the angle scale required for bending. When the steel bar is bent by the thrust of the driving wheel 7, the driving wheel 7 can apply thrust to one of the positioning wheels 108. This positioning wheel 108 drives the driven shaft 102 to rotate through the wheel shaft 109 and the driven rod 107. The rotation angle of the driven shaft 102 The degree is equal to the bending angle of the steel bar, and the driven shaft 102 drives the blocking rod 105 to rotate at the same time. When the driven shaft 102 drives the blocking rod 105 to rotate to the adjusted angle, one side of the blocking rod 105 can just fit into the micro switch 106 located on the side of the stop block 104, thereby triggering the micro switch 106. The micro switch 106 is triggered and sends a signal to the motor 11 through the control circuit at the moment of triggering, so that the motor 11 stops running immediately, thereby stopping the main shaft 3, the sleeve shaft 4, the rotating rod 6, and the moving wheel 7 from rotating, thereby stopping the bending of the steel bar. Therefore, the steel bar can be bent to the required angle accurately and quickly, thereby improving the processing efficiency of the spring steel bar and greatly improving the processing accuracy.

[0048] When the steel bar is bent to a specified angle, there is a certain rebound stress inside the steel bar. The rebound stress will act on another positioning wheel 108 located on the other side of the steel bar, and then be transmitted to the driven shaft 102 through the wheel shaft 109 and the driven rod 107, thereby applying a reverse rotational torque to the driven shaft 102. In order to prevent the driven shaft 102 from rotating in the opposite direction under the action of the reverse torque, the driven shaft 102 will be driven to rotate by the check mechanism during the bending process of the steel bar. The driven shaft 102 drives the first gear 202 in the check mechanism to rotate, and the first gear 202 drives the second gear 204 to rotate through the teeth, and the second gear 204 drives the stop shaft 203 to rotate. The stop shaft 203 drives multiple stop push rods 207 to slide along the inner side of the circular groove 205. When the stop shaft 203 rotates in the bending direction of the steel bar, the multiple stop push rods 207 will not get stuck with the locking teeth 206 When the spring bar 201 is bent to a predetermined angle and the elastic stress is released, the stop shaft 203 is subjected to a reverse torque. At this time, one end of the stop rods 207 can quickly come into contact with the locking teeth 206 at the corresponding position, thereby locking the stop shaft 203 and preventing the stop shaft 203 from rotating in the opposite direction. As a result, the stop shaft 203 can only rotate in one direction relative to the stop column 201. At this time, the other positioning wheel 108 will not rotate in the opposite direction around the axis of the driven shaft 102. The other positioning wheel 108 continuously applies thrust to the bent spring steel bar to maintain pressure and prevent the newly bent spring steel bar from rebounding, thereby further improving the accuracy of the bending angle of the spring steel bar.

[0049] By rotating the screw 304 of the height adjustment mechanism, the screw 304 drives the slider 303 to move up and down on the inner side of the slide groove 302 through the thread, and the slider 303 drives the wire plate 8 to move up and down, so that the height of the wire plate 8 and the guide groove 9 can be adjusted. When the steel bar is placed on the inner side of the guide groove 9, the height of the wire plate 8 and the guide groove 9 is adjusted so that the outer side of the steel bar just contacts the outer side of the centering shaft 5, so that the end of the steel bar can just pass through between the two positioning wheels 108. Therefore, when bending, the bent section of the steel bar can be better adapted to the outer side of the centering shaft 5, further improving the accuracy of the bending angle.

[0050] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spring bending device, comprising a platen and a bearing seat, characterized in that: A main shaft is inserted into the bearing seat for rotation, a sleeve shaft is fixed to one end of the main shaft, a centering shaft is installed at one end of the sleeve shaft, a rotating rod is fixed to one side of the sleeve shaft, a moving wheel is rotatably connected to one end of the rotating rod, and a guide plate is provided on the upper side of the table; It also includes a motor for driving the main shaft to rotate, and the motor is connected to the main shaft through a transmission structure; Also included is an angle limiting mechanism; The angle limiting mechanism includes a vertical plate fixed to the upper side of the table, a driven shaft is rotatably connected to the interior of the vertical plate, a stop rod is fixed to one end of the driven shaft, a driven rod is fixed to the other end of the driven shaft, two positioning wheels are movably provided on one end of the driven rod, one side of the vertical plate is adjustable and rotatably connected to a worm gear arranged concentrically with the driven shaft, a stop block is fixed to one side of the worm gear, a micro switch is provided on one side of the stop block, the micro switch is electrically connected to the motor through a control circuit, and a non-return mechanism is provided between the driven shaft and the vertical plate to prevent the driven shaft from reversing; A support hole is provided at one end of the centering shaft, and one end of the driven shaft is rotatably inserted into the inner side of the support hole; The check mechanism includes a first gear fixed to the outside of the driven shaft and a stop column fixed to one side of the vertical plate. A stop shaft is rotatably inserted into one end of the stop column, and a second gear meshing with the first gear is fixed to one end of the stop shaft. A circular groove is also provided at one end of the stop column, and a plurality of locking teeth are evenly arranged on the inner side of the circular groove. A plurality of stop push rods are rotatably connected to the outer side of the stop shaft, and one side of each stop push rod is elastically connected to the outer side of the stop shaft through a spring sheet. The diameter of the first gear is larger than the diameter of the second gear.

2. The spring bending device according to claim 1, characterized in that: One end of the two positioning wheels is fixed with a wheel axle, the two wheel axles are movably inserted into the interior of the driven rod, and the outer sides of the two wheel axles are rotatably connected to a wheel axle frame.

3. The spring bending device according to claim 1, characterized in that: An angle ruler is arranged on one side of the vertical plate at the outer side of the worm gear, and a pointer is arranged on one end of the stop block.

4. The spring bending device according to claim 1, characterized in that: One side of the vertical plate is rotatably connected with a worm, which is engaged with a worm wheel.

5. The spring bending device according to claim 1, characterized in that: The transmission structure includes a driven pulley fixed to one end of the main shaft and a driving pulley installed at the motor drive end. The driving pulley and the driven pulley are connected by a belt transmission.

6. The spring bending device according to claim 1, characterized in that: A height adjustment mechanism is provided between the wire board and the table. The height adjustment mechanism includes two fixing frames fixed on the upper side of the table and a slider fixed on one side of the wire board. A lifting plate is fixed on one side of the two fixing frames. A sliding groove is provided inside the lifting plate. A screw is rotatably connected to the inner side of the sliding groove. The slider is slidably connected to the inner side of the sliding groove, and the screw is threadedly connected to the inner side of the slider.

7. The spring bending device according to claim 1, characterized in that: A flange is fixed on one end of the centering shaft, and the flange is fixed to one end of the sleeve shaft through bolts.

8. The spring bending device according to claim 1, wherein: A guide groove is provided on the upper side of the wire plate.

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