Cutting mechanism of spring machine

Abstract

The utility model discloses a spring machine cutting mechanism which comprises a rack plate, a cutting shaft driven by a motor is connected to the rack plate in a rotating mode, a cutting swing arm is connected to the cutting shaft, a driving block is connected to the cutting swing arm in a rotating mode, the driving block is connected to the rack plate in a sliding mode, and a cutter is arranged on the driving block. The cut-off shaft is driven by the motor, and compared with a hydraulic device, the cut-off shaft has higher signal response speed and can run at higher applicable speed more easily, so that the spring production efficiency is improved; the rotating speed can be conveniently adjusted to adapt to different spring wire diameters, the suitable speed can be selected for different spring wire diameters, and power waste can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of spring processing, and more specifically, to a spring machine cutting mechanism. Background Art

[0002] The spring machine is a special equipment for producing springs. It can automatically complete the processes of winding, bending and cutting on the spring machine. The cutting mechanism on the existing spring machine usually uses a hydraulic cylinder to provide shearing power, which is limited in speed and affects the spring production efficiency. The utility model patent with publication number CN206276853U discloses a spring machine oil pressure shear structure, including an oil cylinder and a cutter, and the cutter is connected to the front end of the oil cylinder. The utility model uses the oil cylinder control to realize the automatic cutting of the steel wire, and the structure is simple, but as mentioned above, the power transmission speed of the hydraulic cylinder is limited, which will affect the spring production efficiency. Utility Model Content

[0003] The cutting mechanism on the existing spring machine usually adopts a hydraulic cylinder to provide shearing power, which limits the speed and affects the spring production efficiency. In order to overcome this defect, the utility model provides a spring machine cutting mechanism, which can more conveniently adjust the running speed of the cutting mechanism to better adapt to different spring wire diameters, and keep the cutting mechanism at a high running speed to improve the spring production efficiency.

[0004] The technical solution of the utility model is: a spring machine cutting mechanism, including a frame plate, a motor-driven cutting shaft rotatably connected to the frame plate, a cutting swing arm connected to the cutting shaft, a driving block rotatably connected to the cutting swing arm, the driving block slidably connected to the frame plate, and a cutter is provided on the driving block. The cutting shaft drives the cutting swing arm, and the cutting swing arm drives the driving block to slide back and forth, so that the cutter produces a cutting action. The cutting shaft in the spring machine cutting mechanism is driven by a motor, and the rotation speed can be easily adjusted to adapt to different spring wire diameters. For different spring wire diameters, an applicable speed can be selected to avoid power waste. The motor drives the cutting shaft, which can more easily run at a higher applicable speed, thereby improving the spring production efficiency.

[0005] Preferably, the cutting swing arm includes a shaft disc and an eccentric shaft, the shaft disc is fixed to the end of the cutting shaft and exposed outside the frame plate, one end of the eccentric shaft is connected to the shaft disc, the axis of the eccentric shaft deviates from the axis of the cutting shaft, an arm is rotatably connected to the eccentric shaft, and the driving block is connected to the arm. The eccentric shaft is not coaxial with the cutting shaft. When the cutting shaft rotates, the shaft disc drives the eccentric shaft to rotate around the axis of the cutting shaft, the eccentric shaft drives the arm to move, and then drives the driving block to move, and reciprocating motion is achieved under the constraint of the sliding path of the driving block, thereby realizing the cutting function of the cutter.

[0006] Preferably, the other end of the eccentric shaft is connected to an auxiliary balancing shaft coaxial with the cutting shaft, and the auxiliary balancing shaft is rotatably connected to a protective bracket, and the protective bracket is fixed to the frame plate. The auxiliary balancing shaft is supported by the protective bracket, which can form a more stable mechanical structure to support the cutting swing arm, avoid the cutting swing arm from becoming a cantilever structure, and thus improve the transmission capacity of the cutting swing arm.

[0007] Preferably, the eccentric shaft passes through the arm frame, and a bushing is provided at the matching portion between the eccentric shaft and the arm frame. The bushing can reduce the wear of the eccentric shaft and the driving block.

[0008] Preferably, a slide groove body is provided in the frame plate, and the driving block is slidably connected in the slide groove body. The sliding connection of the driving block on the frame plate is achieved by the constraint of the slide groove body on the driving block.

[0009] Preferably, the frame plate is provided with a plurality of pairs of wire feeding rollers, the wire feeding rollers include fixed rollers and adjustable rollers, the fixed rollers are rotatably connected to the frame plate, the frame plate is provided with an adjustment seat, and the adjustable rollers are rotatably connected to the adjustment seat. The adjustable rollers can adjust the spacing with the fixed rollers to adapt to different spring wire diameters.

[0010] Preferably, the frame plate is provided with an adjustment seat embedding groove, in which the adjustment seat is slidably embedded. The adjustment seat embedding groove can constrain the movement path of the adjustment seat, and the adjustment seat can be fine-tuned along the adjustment seat embedding groove to drive the adjustable roller to move and change the spacing with the fixed roller.

[0011] Preferably, a lifting core block is provided below the driving block, the lifting core block is slidably connected to the frame plate, a core block driving arm is also provided on the frame plate, and the output end of the core block driving arm is hinged to the lifting core block. The lifting core block can support and position the spring to be cut, ensuring that the cutter can successfully cut the spring.

[0012] The beneficial effects of the utility model are:

[0013] The running speed is fast, which is beneficial to improving the spring production efficiency. The cutting shaft in the utility model is driven by a motor, has a higher signal response speed than the hydraulic device, can be more easily operated at a higher applicable speed, and improves the spring production efficiency.

[0014] The running speed is easy to adjust. The cutting shaft in the utility model is driven by a motor, and the rotation speed can be conveniently adjusted to adapt to different spring wire diameters. For different spring wire diameters, suitable speeds can be selected to avoid power waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the use state of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the utility model.

[0017] Figure 3 This is a disassembled diagram of the matching structure of the cutting shaft and the cutting swing arm in the utility model.

[0018] Figure 4 This is a disassembly diagram of the matching structure of the cutting shaft, cutting swing arm, driving block and cutter in the utility model.

[0019] Figure 5 It is a schematic diagram of a connection structure of a cutting shaft and a cutting swing arm in the utility model.

[0020] Figure 6 This is a disassembled diagram of the matching structure of the cutting swing arm, the driving block and the slide chute body in the utility model.

[0021] Figure 7 It is a schematic diagram of a connection structure of a cutting shaft, a cutting swing arm, a driving block and a slide chute body in the utility model.

[0022] Figure 8 It is a schematic diagram of another connection structure of the cutting shaft and the cutting swing arm in the utility model.

[0023] In the figure, 1-frame plate, 2-cutting shaft, 3-cutting swing arm, 301-shaft disc, 302-eccentric shaft, 303-auxiliary balancing shaft, 304-arm, 305-bushing, 4-driving block, 5-cutter, 6-protective bracket, 7-chute body, 8-wire feeding roller, 801-fixed roller, 802-adjustable roller, 9-adjusting seat, 10-adjusting seat groove, 11-lifting core block, 12-core block driving arm, 13-cutter fixture, 14-notch, 15-guide head. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the specific embodiments of the drawings.

[0025] Embodiment 1:

[0026] like Figures 1 to 7As shown, a spring machine cutting mechanism includes a frame plate 1, a cutting shaft 2 and a cutting swing arm 3. The cutting shaft 2 is rotatably connected to the frame plate 1 and is connected to a motor. The frame plate 1 is provided with a cutting shaft mounting hole. The cutting shaft 2 passes through the cutting shaft mounting hole and is matched with the cutting shaft mounting hole through a bearing. The front end of the cutting shaft 2 is exposed on the front side of the frame plate 1, and the middle section to the rear end of the cutting shaft 2 are located on the back side of the frame plate 1. The cutting swing arm 3 is connected to the front end of the cutting shaft 2. The cutting swing arm 3 includes a shaft disc 301, an eccentric shaft 302 and an arm bracket 304. The shaft disc 301 is a gourd-shaped flat plate. The shaft disc 301 is fixed to the front end of the cutting shaft 2 and is located on the front side of the frame plate 1. The shaft disc 301 and the cutting shaft 2 are integrally formed. The rear end of the eccentric shaft 302 is connected to the front side of the shaft disc 301, that is, the side away from the front side of the frame plate 1, by bolts, and the eccentric shaft 302 is offset at the near edge of the shaft disc 301. The axis center of the eccentric shaft 302 deviates from the axis center of the cutting shaft 2, that is, the eccentric shaft 302 is not coaxial with the cutting shaft 2. The arm 304 includes an arm body and an arc-shaped top pressure strip, which is fixed to the top of the arm body by screws. The top of the arm body and the bottom of the top pressure strip are both provided with semicircular holes, and the two semicircular holes are assembled into a circular hole for cooperating with the eccentric shaft 302. The eccentric shaft 302 passes through the circular hole, and a bushing 305 is provided between the eccentric shaft 302 and the wall of the circular hole. The eccentric shaft 302 can rotate in the circular hole, so that the arm 304 is rotatably connected to the eccentric shaft 302. A driving block 4 is slidably connected to the frame plate 1, and the top of the driving block 4 is rotatably connected to the bottom of the arm 304 through a rotating shaft. A cutting tool fixture 13 is installed at the bottom of the driving block 4 by screws, and a cutting tool 5 is detachably installed on the cutting tool fixture 13. An end plate is provided at the front end of the eccentric shaft 302, and an auxiliary balancing shaft 303 is integrally provided on the end plate. The auxiliary balancing shaft 303 is coaxial with the cutting shaft 2. A "X"-shaped protective bracket 6 is provided on the frame plate 1, and the protective bracket 6 is composed of a pair of symmetrically arranged L-shaped side panels and a panel. The two side panels are fixed to the frame plate 1 by screws, and the panel spans between the two side panels and is fixed with screws. A through hole matching the auxiliary balancing shaft 303 is provided on the panel, and the auxiliary balancing shaft 303 is rotatably connected to the panel of the protective bracket 6 through a bearing.

[0027] The frame plate 1 is provided with a chute body 7 corresponding to the position of the driving block 4 by screws. The chute body 7 is U-shaped. Pressure plates are installed on both sides of the U-shaped opening of the chute body 7 by screws. The width of the pressure plate is slightly larger than the thickness of both sides of the chute body 7, so that the opening width of the chute body 7 is smaller than the bottom width of the U-shaped opening, forming a T-shaped groove. The driving block 4 is slidably connected in the chute body 7. Both sides of the driving block 4 are pressed and fitted by the pressure plate, so that the driving block 4 will not vertically detach from the notch of the chute body 7. The frame plate 1 is provided with six sets of oppositely rolling wire feeding rollers 8, which are used to push the wire for spring winding and forming. The wire feeding rollers 8 are arranged in a straight line in groups of two, and the ends of the linear array of the wire feeding rollers 8 correspond to the cutting working position of the cutter 5. The wire feeding rollers 8 include a fixed roller 801 and an adjustable roller 802. The fixed roller 801 is rotatably connected to the frame plate 1. The frame plate 1 is provided with an adjustment seat 9 and an adjustment seat embedding groove 10. The adjustment seat 9 is slidably embedded in the adjustment seat embedding groove 10, and the adjustable roller 802 is rotatably connected to the adjustment seat 9. The rolling surfaces of the fixed rollers 801 and the adjustable rollers 802 are provided with wheel grooves adapted to the wire diameter of the spring. The steel wire is embedded in the wheel groove, and the fixed rollers 801 and the adjustable rollers 802 of the opposite rollers clamp the circumference of the steel wire, and push the steel wire outward through the static friction between the fixed rollers 801, the adjustable rollers 802 and the steel wire. A notch 14 is provided on the frame plate 1 below the driving block 4, which runs through the front and back sides of the frame plate 1. A lifting core block 11 is slidably connected in the notch 14. A core block driving arm 12 and a guide head 15 are also provided on the frame plate 1 next to the notch 14. The core block driving arm 12 is an electric cylinder. The output end of the core block driving arm 12 is hinged to the lifting core block 11, and the guide head 15 is driven by a guide head motor.

[0028] The cutting mechanism of the spring machine operates under the control of PLC. During operation, the wire feeding roller 8 pushes the steel wire material outward and extends it 3 cm outside the last group of wire feeding rollers 8, then pauses; the core block driving arm 12 and the guide head 15 are started under the control of PLC to block, guide, bend and other operations on the exposed steel wire material, and then the wire feeding roller 8 is started again to push the steel wire material under the control of PLC, and the continuously pushed steel wire material is bent and wound, and the spring winding length is determined by the built-in program of PLC; after the winding is completed, the PLC controls the motor connected to the cutting shaft 2 to start, and the cutting shaft 2 rotates, driving the cutting swing arm 3 to rotate, and then driving the driving block 4 and the cutting knife 5 to descend along the sliding path defined by the slide chute body 7, and the formed spring is cut off as a whole with the cooperation of the lifting core block 11.

[0029] Embodiment 2:

[0030] like Figure 1 , Figure 2 , Figure 6 , Figure 8As shown, a spring machine cutting mechanism includes a frame plate 1, a cutting shaft 2 and a cutting swing arm 3. The cutting shaft 2 is rotatably connected to the frame plate 1 and is connected to a motor. The frame plate 1 is provided with a cutting shaft mounting hole. The cutting shaft 2 passes through the cutting shaft mounting hole and is matched with the cutting shaft mounting hole through a bearing. The front end of the cutting shaft 2 is exposed on the front side of the frame plate 1, and the middle section to the rear end of the cutting shaft 2 is located on the back side of the frame plate 1. The cutting swing arm 3 is connected to the front end of the cutting shaft 2. The cutting swing arm 3 includes a shaft disc 301 and an eccentric shaft 302. Different from Example 1, the shaft disc 301 is a waisted flat plate. The shaft disc 301 is fixed to the front end of the cutting shaft 2 and is located on the front side of the frame plate 1. The shaft disc 301 and the cutting shaft 2 are integrally formed. The rear end of the eccentric shaft 302 is connected to the front side of the shaft disc 301, that is, the side away from the front side of the frame plate 1, by bolts, and the eccentric shaft 302 is offset at the near edge of the shaft disc 301. The axis center of the eccentric shaft 302 deviates from the axis center of the cutting shaft 2, that is, the eccentric shaft 302 is not coaxial with the cutting shaft 2. The arm 304 includes an arm body and an arc-shaped top pressure strip, which is fixed to the top of the arm body by screws. The top of the arm body and the bottom of the top pressure strip are both provided with semicircular holes, and the two semicircular holes are assembled into a circular hole for cooperating with the eccentric shaft 302. The eccentric shaft 302 passes through the circular hole, and a bushing 305 is provided between the eccentric shaft 302 and the wall of the circular hole. The eccentric shaft 302 can rotate in the circular hole, so that the arm 304 is rotatably connected to the eccentric shaft 302. A driving block 4 is slidably connected to the frame plate 1, and the top of the driving block 4 is rotatably connected to the bottom of the arm 304 through a rotating shaft. A cutting tool fixture 13 is installed at the bottom of the driving block 4 by screws, and a cutting tool 5 is detachably installed on the cutting tool fixture 13. An end plate is provided at the front end of the eccentric shaft 302, and an auxiliary balancing shaft 303 is integrally provided on the end plate. The auxiliary balancing shaft 303 is coaxial with the cutting shaft 2. A "X"-shaped protective bracket 6 is provided on the frame plate 1, and the protective bracket 6 is composed of a pair of symmetrically arranged L-shaped side panels and a panel. The two side panels are fixed to the frame plate 1 by screws, and the panel spans between the two side panels and is fixed with screws. A through hole matching the auxiliary balancing shaft 303 is provided on the panel, and the auxiliary balancing shaft 303 is rotatably connected to the panel of the protective bracket 6 through a bearing.

[0031] The frame plate 1 is provided with a chute body 7 corresponding to the position of the driving block 4 by screws. The chute body 7 is U-shaped. Pressure plates are installed on both sides of the U-shaped opening of the chute body 7 by screws. The width of the pressure plate is slightly larger than the thickness of both sides of the chute body 7, so that the opening width of the chute body 7 is smaller than the bottom width of the U-shaped opening, forming a T-shaped groove. The driving block 4 is slidably connected in the chute body 7. Both sides of the driving block 4 are pressed and fitted by the pressure plate, so that the driving block 4 will not vertically detach from the notch of the chute body 7. The frame plate 1 is provided with six sets of oppositely rolling wire feeding rollers 8, which are used to push the wire for spring winding and forming. The wire feeding rollers 8 are arranged in a straight line in groups of two, and the ends of the linear array of the wire feeding rollers 8 correspond to the cutting working position of the cutter 5. The wire feeding rollers 8 include a fixed roller 801 and an adjustable roller 802. The fixed roller 801 is rotatably connected to the frame plate 1. The frame plate 1 is provided with an adjustment seat 9 and an adjustment seat embedding groove 10. The adjustment seat 9 is slidably embedded in the adjustment seat embedding groove 10, and the adjustable roller 802 is rotatably connected to the adjustment seat 9. The rolling surfaces of the fixed rollers 801 and the adjustable rollers 802 are provided with wheel grooves adapted to the wire diameter of the spring. The steel wire is embedded in the wheel groove, and the fixed rollers 801 and the adjustable rollers 802 of the opposite rollers clamp the circumference of the steel wire, and push the steel wire outward through the static friction between the fixed rollers 801, the adjustable rollers 802 and the steel wire. A notch 14 is provided on the frame plate 1 below the driving block 4, which runs through the front and back sides of the frame plate 1. A lifting core block 11 is slidably connected in the notch 14. A core block driving arm 12 and a guide head 15 are also provided on the frame plate 1 next to the notch 14. The core block driving arm 12 is an electric cylinder. The output end of the core block driving arm 12 is hinged to the lifting core block 11, and the guide head 15 is driven by a guide head motor.

[0032] The cutting mechanism of the spring machine operates under the control of PLC. During operation, the wire feeding roller 8 pushes the steel wire material outward and extends it 3 cm outside the last group of wire feeding rollers 8, then pauses; the core block driving arm 12 and the guide head 15 are started under the control of PLC to block, guide, bend and other operations on the exposed steel wire material, and then the wire feeding roller 8 is started again to push the steel wire material under the control of PLC, and the continuously pushed steel wire material is bent and wound, and the spring winding length is determined by the built-in program of PLC; after the winding is completed, the PLC controls the motor connected to the cutting shaft 2 to start, and the cutting shaft 2 rotates, driving the cutting swing arm 3 to rotate, and then driving the driving block 4 and the cutting knife 5 to descend along the sliding path defined by the slide chute body 7, and the formed spring is cut off as a whole with the cooperation of the lifting core block 11.

[0033] Embodiment 3:

[0034] like Figures 3 to 7As shown, a spring machine cutting mechanism includes a frame plate 1, a cutting shaft 2 and a cutting swing arm 3. The cutting shaft 2 is rotatably connected to the frame plate 1 and is connected to a motor. The frame plate 1 is provided with a cutting shaft mounting hole. The cutting shaft 2 passes through the cutting shaft mounting hole and is matched with the cutting shaft mounting hole through a bearing. The front end of the cutting shaft 2 is exposed on the front side of the frame plate 1, and the middle section to the rear end of the cutting shaft 2 are located on the back side of the frame plate 1. The cutting swing arm 3 is connected to the front end of the cutting shaft 2. The cutting swing arm 3 includes a shaft disc 301 and an eccentric shaft 302. The shaft disc 301 is a gourd-shaped flat plate. The shaft disc 301 is fixed to the front end of the cutting shaft 2 and is located on the front side of the frame plate 1. The shaft disc 301 and the cutting shaft 2 are integrally formed. The rear end of the eccentric shaft 302 is connected to the front side of the shaft disc 301, that is, the side away from the front side of the frame plate 1, by bolts. The eccentric shaft 302 is offset to the near edge of the shaft disc 301. The axis of the eccentric shaft 302 deviates from the axis of the cutting shaft 2, that is, the eccentric shaft 302 is not coaxial with the cutting shaft 2. The arm 304 includes an arm body and an arc-shaped top pressure strip. The top pressure strip is fixed to the top of the arm body by screws. Semicircular holes are provided at the top of the arm body and the bottom of the top pressure strip, and the two semicircular holes are assembled into a circular hole for matching with the eccentric shaft 302. The eccentric shaft 302 passes through the circular hole, and a bushing 305 is provided between the eccentric shaft 302 and the wall of the circular hole. The eccentric shaft 302 can rotate in the circular hole, so that the arm 304 is rotatably connected to the eccentric shaft 302. A driving block 4 is slidably connected to the frame plate 1. The top of the driving block 4 is rotatably connected to the bottom of the arm 304 through a rotating shaft. A cutting tool fixture 13 is installed at the bottom of the driving block 4 through screws, and a cutting tool 5 is detachably installed on the cutting tool fixture 13. An end plate is provided at the front end of the eccentric shaft 302, and an auxiliary balancing shaft 303 is integrally provided on the end plate. The auxiliary balancing shaft 303 is coaxial with the cutting shaft 2. A protective bracket 6 in the shape of a Chinese character "J" is provided on the frame plate 1. The protective bracket 6 is composed of a pair of symmetrically arranged L-shaped side plates and a panel. The two side plates are fixed to the frame plate 1 by screws. The panel is connected between the two side plates and fixed by screws. The panel is provided with a through hole that matches the auxiliary balancing shaft 303. The auxiliary balancing shaft 303 is rotatably connected to the panel of the protective bracket 6 through a bearing.

[0035] The frame plate 1 is provided with a chute body 7 corresponding to the position of the driving block 4 by screws. The chute body 7 is U-shaped. Pressure plates are installed on both sides of the U-shaped opening of the chute body 7 by screws. The width of the pressure plate is slightly larger than the thickness of both sides of the chute body 7, so that the opening width of the chute body 7 is smaller than the bottom width of the U-shaped opening, forming a T-shaped groove. The driving block 4 is slidably connected in the chute body 7. Both sides of the driving block 4 are pressed and fitted by the pressure plate, so that the driving block 4 will not vertically detach from the notch of the chute body 7. Different from the embodiment 1, the frame plate 1 is provided with five sets of oppositely rolling steel wire feeding rollers 8, which are used to push the steel wire for spring winding and forming. The wire feeding rollers 8 are arranged in a straight line in groups of two, and the ends of the linear array of the wire feeding rollers 8 correspond to the cutting working position of the cutter 5. The wire feeding rollers 8 include a fixed roller 801 and an adjustable roller 802. The fixed roller 801 is rotatably connected to the frame plate 1. The frame plate 1 is provided with an adjustment seat 9 and an adjustment seat embedding groove 10. The adjustment seat 9 is slidably embedded in the adjustment seat embedding groove 10, and the adjustable roller 802 is rotatably connected to the adjustment seat 9. The rolling surfaces of the fixed rollers 801 and the adjustable rollers 802 are provided with wheel grooves adapted to the wire diameter of the spring. The steel wire is embedded in the wheel groove, and the fixed rollers 801 and the adjustable rollers 802 of the opposite rollers clamp the circumference of the steel wire, and push the steel wire outward through the static friction between the fixed rollers 801, the adjustable rollers 802 and the steel wire. A notch 14 is provided on the frame plate 1 below the driving block 4, which runs through the front and back sides of the frame plate 1. A lifting core block 11 is slidably connected in the notch 14. A core block driving arm 12 and a guide head 15 are also provided on the frame plate 1 next to the notch 14. The core block driving arm 12 is an electric cylinder. The output end of the core block driving arm 12 is hinged to the lifting core block 11, and the guide head 15 is driven by a guide head motor.

[0036] The cutting mechanism of the spring machine operates under the control of PLC. During operation, the wire feeding roller 8 pushes the steel wire material outward and extends it 3 cm outside the last group of wire feeding rollers 8, then pauses; the core block driving arm 12 and the guide head 15 are started under the control of PLC to block, guide, bend and other operations on the exposed steel wire material, and then the wire feeding roller 8 is started again to push the steel wire material under the control of PLC, and the continuously pushed steel wire material is bent and wound, and the spring winding length is determined by the built-in program of PLC; after the winding is completed, the PLC controls the motor connected to the cutting shaft 2 to start, and the cutting shaft 2 rotates, driving the cutting swing arm 3 to rotate, and then driving the driving block 4 and the cutting knife 5 to descend along the sliding path defined by the slide chute body 7, and the formed spring is cut off as a whole with the cooperation of the lifting core block 11.

Claims

1. A spring cutting mechanism, characterized in that: The machine comprises a frame plate, which is rotatably connected to a cutting shaft driven by a motor, a cutting swing arm is connected to the cutting shaft, a driving block is rotatably connected to the cutting swing arm, the driving block is slidably connected to the frame plate, a cutting knife is arranged on the driving block, the cutting swing arm comprises a shaft disk and an eccentric shaft, the shaft disk is fixed to the end of the cutting shaft and exposed outside the frame plate, one end of the eccentric shaft is connected to the shaft disk, the axis center of the eccentric shaft deviates from the axis center of the cutting shaft, an arm bracket is connected to the eccentric shaft, the driving block is connected to the arm bracket, the other end of the eccentric shaft is connected to an auxiliary balancing shaft coaxial with the cutting shaft, and the auxiliary balancing shaft is rotatably connected to a protective bracket.

2. The spring cutting mechanism according to claim 1, characterized in that: The protective bracket is fixed to the frame plate.

3. The spring cutting mechanism according to claim 1, characterized in that: The eccentric shaft passes through the arm frame, and a bushing is provided at the matching part of the eccentric shaft and the arm frame.

4. The spring cutting mechanism according to claim 1, characterized in that: A slide groove body is arranged on the frame plate, and the driving block is slidably connected in the slide groove body.

5. The spring cutting mechanism according to claim 1, characterized in that: The frame plate is provided with a plurality of pairs of wire feeding rollers, the wire feeding rollers include fixed rollers and adjustable rollers, the fixed rollers are rotatably connected to the frame plate, the frame plate is provided with an adjustment seat, and the adjustable rollers are rotatably connected to the adjustment seat.

6. The spring cutting mechanism according to claim 5, characterized in that: The frame plate is provided with an adjusting seat embedding groove, and the adjusting seat is slidably embedded in the adjusting seat embedding groove.

7. The spring cutting mechanism according to any one of claims 1 to 6, characterized in that: A lifting core block is arranged below the driving block, and the lifting core block is slidably connected to the frame plate. A core block driving arm is also arranged on the frame plate, and the output end of the core block driving arm is hinged to the lifting core block.

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