Spring machine cutting device with automatic stop protection for broken material

Abstract

The utility model relates to a spring machine cutting device with material breakage automatic shutdown protection, including feeding pipeline, the flange disc is fixed with the feeding pipeline feed end, the discharge end is fixed with the mounting bracket, and the cutter is symmetrically slidably installed on the mounting bracket and located the discharge port both sides of feeding pipeline, the driving mechanism, conveying mechanism and material shortage detection unit are equipped in proper order from the mounting bracket to the flange disc one side on feeding pipeline, the driving mechanism is used for driving two cutters to be close to each other or each other to be far away, to realize cutting action. The utility model discloses through material shortage detection unit to the real -time monitoring of wire rod in feeding pipeline, forms the self -stop mechanism of protection mechanism, when the wire disc wire rod is used up or breaks and leads to material shortage, and the control system controls driving mechanism to terminate the cutting action of driving cutter, avoids the empty cutting condition of cutter, through the spacing optimization of material shortage detection unit monitoring point position and cutter cutting point position, ensures wire rod conveying stability, avoids the problem of waste product of material breakage time difference.

Description

Technical Field

[0001] This utility model relates to the field of spring processing technology, specifically a spring cutting device with automatic stop protection against material breakage. Background Technology

[0002] When processing springs, the coiled wire is first fed into the feeding channel by the wire feeding mechanism, and the wire tension is controlled to maintain stability. After the wire extends from the channel outlet to a preset length, the programmable bending mechanism completes the bending, winding, twisting and other forming actions of the wire according to the spring parameters. After the spring body is formed, the cutting mechanism will cut the wire according to the set size to form a single spring semi-finished product.

[0003] In actual production, the wire on the reel may sometimes break due to its own quality problems or external winding problems. In addition, when the wire on the reel is used up, there will be a shortage of material. When a material shortage occurs, the cutting mechanism will cut without material. If the operator fails to detect the material shortage in time, the equipment will continue to run without material, resulting in unnecessary energy consumption. Furthermore, there is a time difference between the detection of the material shortage and the shutdown process. During this time, all products produced are scrap, resulting in material cost waste. Utility Model Content

[0004] The purpose of this invention is to provide a spring machine cutting device with automatic stop protection against material breakage, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A spring cutting device with automatic stop protection against material shortage includes a feeding pipe, a flange fixed at the inlet end of the feeding pipe, and a mounting bracket fixed at the outlet end. Cutting tools are symmetrically and slidably mounted on the mounting bracket on both sides of the outlet of the feeding pipe. A drive mechanism, a conveying mechanism, and a material shortage detection unit are sequentially arranged on the feeding pipe from the mounting bracket to the flange side. The drive mechanism drives the two cutting tools to move closer or further apart to achieve the cutting action. The conveying mechanism conveys the wire in the feeding pipe. The material shortage detection unit monitors whether there is a material shortage in the feeding pipe. When the material shortage detection unit detects a material shortage, the control system controls the drive mechanism to stop working. The distance between the monitoring point of the material shortage detection unit and the cutting point of the cutting tool is greater than the total length of wire required for spring forming.

[0007] Furthermore, the material shortage detection unit uses a photoelectric sensor, including a transmitter and a receiver; a pair of mounting slots are symmetrically provided on the feeding pipe, and mounting plates are installed in both mounting slots; the transmitter and receiver are respectively mounted on the two mounting plates, and a detection zone for the wire to pass through is formed between them; the receiver is electrically connected to the control system.

[0008] Furthermore, the mounting groove is an elongated groove that extends along the length of the feeding pipe, and the two mounting plates are slidably installed in the corresponding mounting grooves; a circular ring is slidably fitted on the outside of the feeding pipe, and the circular ring has a threaded hole, and both mounting plates are fixed to the circular ring; a support plate is fixed on the outer wall of the feeding pipe, and an adjusting screw is rotatably installed on the support plate; the adjusting screw is threadedly installed through the threaded hole.

[0009] Furthermore, the drive mechanism includes an annular component, a gear ring, connecting rods, an electric pusher cylinder, and a rack; two symmetrical sliding grooves are provided on the mounting frame, and sliders A are slidably installed in each of the two sliding grooves; two cutters are respectively fixed on their corresponding sliders A; the annular component is rotatably mounted on the feeding pipe, and two connecting rods are symmetrically hinged on the annular component, with the other ends of the two connecting rods respectively hinged to their corresponding sliders A; a gear ring is fixed on the outer circumference of the annular component; an electric pusher cylinder is fixed on the side of the mounting frame via a mounting seat, and a rack is fixed on the telescopic end of the electric pusher cylinder, with the rack corresponding to and meshing with the gear ring; wherein, the electric pusher cylinder is controlled by the control system.

[0010] Furthermore, a protective cover is slidably installed on the side of the mounting frame above the outlet of the feeding pipe; the opening of the protective cover faces downward; a connecting arm is fixed to the side of the rack, and the end of the connecting arm is fixed to the side of the protective cover.

[0011] Furthermore, the conveying mechanism includes a drive wheel, a pressure wheel, slider B, a support spring, and a drive motor; the feeding pipe is symmetrically provided with two wheel grooves, and side plates are symmetrically fixed on both sides of the feeding pipe; the drive wheel is rotatably mounted between the two side plates via a shaft, and the drive wheel is embedded in one of the wheel grooves; slider B is slidably mounted in the vertical grooves on both side plates; the pressure wheel is rotatably mounted between the two sliders B via a shaft, and the pressure wheel is embedded in the other wheel groove; a support spring is fixed on both sliders B, and the other end of both support springs is fixed to the inner wall of the vertical groove; a drive motor is fixed on one side plate, and the output shaft of the drive motor is fixed to one side shaft end of the drive wheel.

[0012] Furthermore, a pressure sensor is installed on the inner wall of one of the vertical grooves to detect whether a wire passes between the drive wheel and the pressure wheel; the pressure sensor is electrically connected to the control system, and the drive motor is controlled by the control system.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0014] The material shortage detection unit monitors the wire in the feeding pipe in real time, forming a self-stop protection mechanism for cutting. When the wire on the reel is used up or broken, resulting in a material shortage, the control system controls the drive mechanism to stop the cutting action of the drive blade, avoiding the situation of the blade cutting without material. The distance between the monitoring point of the material shortage detection unit and the cutting point of the blade is optimized to ensure stable wire feeding and avoid the problem of scrap caused by the material shortage time difference. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0016] Figure 2 for Figure 1 Another perspective view of the structure shown;

[0017] Figure 3 This is a schematic diagram of the material shortage detection unit in this utility model;

[0018] Figure 4 This is a schematic diagram of the conveying mechanism in this utility model;

[0019] Figure 5 This is a schematic diagram of the drive mechanism structure in this utility model;

[0020] Figure 6 This is a system principle block diagram of the present invention;

[0021] Figure 7 This is a diagram showing the minimum limit length required for bending wire.

[0022] In the diagram: 1. Feeding pipe; 11. Flange; 12. Mounting bracket; 121. Slide groove; 122. Mounting base; 2. Cutting tool; 3. Drive mechanism; 31. Ring component; 32. Gear ring; 33. Slider A; 34. Connecting rod; 35. Electric push cylinder; 36. Rack; 37. Connecting arm; 4. Conveying mechanism; 401. Wheel groove; 41. Side plate; 411. Vertical groove; 42. Drive wheel; 43. Pressure roller; 44. Slider B; 45. Support spring; 46. Pressure sensor; 47. Drive motor; 5. Material shortage detection unit; 51. Mounting groove; 52. Mounting plate; 53. Transmitter; 54. Receiver; 55. Ring component; 551. Threaded hole; 56. Support plate; 57. Adjusting screw; 6. Protective cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to 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 the embodiments of this utility model.

[0025] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0026] Example 1

[0027] Please see Figures 1-7 This utility model provides a spring machine cutting device with automatic stop protection for material breakage, including a feeding pipe 1. A flange 11 is fixed at the inlet end of the feeding pipe 1. The flange 11 is fixed to the outlet side of the spring machine by bolts to realize the fixed installation of the feeding pipe 1, so that the inlet of the feeding pipe 1 is connected to the wire outlet of the spring machine, and the wire enters the inside of the feeding pipe 1 so as to feed the wire axially. In addition, a mounting bracket 12 is fixed at the outlet end of the feeding pipe 1, and the mounting bracket 12 provides installation space for subsequent components.

[0028] Cutters 2 are symmetrically slidably mounted on the mounting bracket 12 on both sides of the outlet of the feeding pipe 1. A drive mechanism 3, a conveying mechanism 4, and a material shortage detection unit 5 are sequentially arranged on the feeding pipe 1 from the mounting bracket 12 to the flange 11. The drive mechanism 3 is used to drive the two cutters 2 to move closer or further apart to achieve the cutting action. The conveying mechanism 4 is used to convey the wire in the feeding pipe 1. The material shortage detection unit 5 is used to monitor whether there is a material shortage in the feeding pipe 1. When the material shortage detection unit 5 detects that there is a material shortage, the control system controls the drive mechanism 3 to stop working.

[0029] In addition, a bending mechanism is also provided on the discharge side of the spring machine. The bending mechanism adopts existing technology, and its specific structure and principle will not be described in detail.

[0030] This is used to bend the wire extending from the outlet of the feeding pipe 1 until it is formed into the desired spring shape.

[0031] The operation is initiated by the conveying mechanism 4, which generates driving force on the wire in the feeding pipe 1, pushing the wire along the channel in the feeding pipe 1 towards the mounting frame 12. The wire extends out from the outlet of the feeding pipe 1. At the same time, the control system controls the bending mechanism to work synchronously, bending the extended wire until it is formed into the required spring shape. Then, the control system controls the drive mechanism 3 to work, driving the two cutters 2 to move closer to each other and cut the wire at the outlet of the feeding pipe 1, thus realizing a complete spring processing. After the wire is cut, the drive mechanism 3 drives the two cutters 2 to move away from each other, and the conveying mechanism 4 drives the subsequent wire to continue to be conveyed. This process is repeated to achieve continuous spring processing.

[0032] During the above process, the material shortage detection unit 5 is always in working condition, and monitors in real time whether there is wire in the feeding pipe 1. Specifically, the material shortage detection unit 5 uses a photoelectric sensor, including a transmitter 53 and a receiver 54. A pair of mounting slots 51 are symmetrically provided on the feeding pipe 1. Mounting plates 52 are installed in both mounting slots 51. The transmitter 53 and receiver 54 are respectively mounted on the two mounting plates 52, and a detection zone for wire to pass through is formed between them. The receiver 54 is electrically connected to the control system. During normal feeding, the wire continuously passes through the detection zone, which will block the detection signal emitted by the transmitter 53. The receiver 54 receives the signal blocked by the wire and transmits the material presence signal to the control system. After receiving the material presence signal, the control system determines that the material supply in the feeding pipe 1 is normal and maintains the working state of the drive mechanism 3 and the conveying mechanism 4 to ensure continuous processing. Conversely, when a material shortage signal is detected, the control system controls the drive mechanism 3 to maintain a non-cutting state to avoid empty cutting.

[0033] Example 2

[0034] In actual production, limiting the wire through the feeding channel can prevent the wire from shifting or deviating during bending, thus ensuring the accuracy of key forming dimensions such as spring coil diameter and pitch. If only a short portion of the wire's tail is within the channel, the channel's constraint strength is insufficient, and the wire's position is prone to shifting under bending force, affecting the bending quality. (See the instruction manual attached.) Figure 7 As shown, section A is the forming length, which is the length of the finished spring when straight. Section B is the minimum constraint length of the wire that needs to be limited within the feeding channel. The cutting point is between the two. The total length of section A and section B is defined as the minimum limit length required for bending. If the remaining material is less than this minimum limit length, the produced spring will be defective and a non-conforming product.

[0035] In view of the above situation, this embodiment makes the following design based on embodiment 1:

[0036] The distance between the monitoring point of the material shortage detection unit 5 and the cutting point of the tool 2 is greater than the total length of wire required for spring forming. Specifically, the distance between the monitoring point and the cutting point is greater than or equal to the minimum limit length required for bending the wire. This ensures that when the material shortage detection unit 5 detects a material shortage, the remaining wire length in the feeding pipe 1 is just insufficient to meet the forming requirements, providing accurate timing nodes and material judgment basis for subsequent shutdown protection.

[0037] After receiving the material shortage signal, the control system determines, based on the spacing parameters: if the remaining wire can only form a length less than the minimum limit length required for bending the wire, the insufficient constraint length within the feeding pipe 1 will easily lead to forming defects. In this case, the processed spring is considered scrap. The control system then controls the bending mechanism and drive mechanism 3 to stop simultaneously to avoid idling and resulting in ineffective losses and wasted energy.

[0038] Example 3

[0039] Please see Figure 3 The difference between this embodiment and Embodiment 1 is that:

[0040] The mounting groove 51 is an elongated groove that extends along the length of the feeding pipe 1. Two mounting plates 52 are slidably installed in their respective mounting grooves 51. A circular ring 55 is slidably fitted on the outside of the feeding pipe 1, and the circular ring 55 has a threaded hole 551. Both mounting plates 52 are fixed to the circular ring 55. A support plate 56 is fixed on the outer wall of the feeding pipe 1. An adjusting screw 57 is rotatably installed on the support plate 56. The adjusting screw 57 is threadedly installed through the threaded hole 551. By turning the adjusting screw 57, under the threaded engagement with the threaded hole 551, the adjusting screw 57 can drive the circular ring 55 and drive the entire material shortage detection unit 5 to move and adjust along the axial direction of the feeding pipe 1, so as to adapt to the processing of springs of different lengths and have high versatility.

[0041] Example 4

[0042] Please see Figure 5 This embodiment further explains the drive mechanism 3 in Embodiment 1, as follows:

[0043] The drive mechanism 3 includes an annular component 31, a toothed ring 32, a connecting rod 34, an electric push cylinder 35, and a rack 36. The mounting frame 12 is symmetrically provided with two sliding grooves 121, and a slider A33 is slidably installed in each of the two sliding grooves 121. The two cutters 2 are respectively fixed on the corresponding slider A33. The annular component 31 is rotatably installed on the feeding pipe 1. Two connecting rods 34 are symmetrically hinged on the annular component 31. The other ends of the two connecting rods 34 are respectively hinged to the corresponding slider A33. A toothed ring 32 is fixed on the outer periphery of the annular component 31. An electric push cylinder 35 is fixed on the side of the mounting frame 12 through a mounting seat 122. A rack 36 is fixed on the telescopic end of the electric push cylinder 35, and the rack 36 meshes with the toothed ring 32. The electric push cylinder 35 is controlled by the control system.

[0044] When the electric push cylinder 35 receives the cutting signal, it extends and drives the rack 36 fixed at its end to move synchronously. Since the rack 36 meshes with the toothed ring 32, the linear motion of the rack 36 is converted into the rotational motion of the toothed ring 32 and the ring member 31. When the ring member 31 rotates, the connecting rods 34 symmetrically hinged on both sides swing synchronously. Since the rotation direction of the ring member 31 is fixed, the two connecting rods 34 pull the corresponding slider A33 and the cutter 2 towards the axis of the feeding pipe 1, reducing the distance between the two cutters 2. Finally, the working ends of the two cutters 2 form a shearing force on the protruding wire at the outlet of the feeding pipe 1, completing the cutting action. After the cutting is completed, the control system controls the electric push cylinder 35 to retract, which is the opposite of the above driving process. This drives the two cutters 2 to move away from each other, realizing the reset of the cutters 2, so that the wire can pass between the two cutters 2 for the next cutting process.

[0045] In addition, a protective cover 6 is slidably installed on the side of the mounting bracket 12 above the outlet of the feeding pipe 1. The opening of the protective cover 6 faces downward. A connecting arm 37 is fixed to the side of the rack 36. The end of the connecting arm 37 is fixed to the side of the protective cover 6. During the cutting process, the connecting arm 37 can drive the protective cover 6 to move downward synchronously. The protective cover 6 can cover the outlet of the feeding pipe 1 and the formed spring, preventing the spring from flying around due to force during cutting. The downward opening of the protective cover 6 is conducive to the downward orientation of the cut spring product. In addition, when the electric push cylinder 35 drives the cutter 2 to reset, the rack 36 drives the protective cover 6 to move upward synchronously under the connection of the connecting arm 37, making room at the outlet of the feeding pipe 1 and preventing the protective cover 6 from obstructing the operation of the bending mechanism. Thus, the protective cover 6 achieves the synchronous effect of cutting and protection.

[0046] Example 5

[0047] Please see Figure 4 This embodiment further explains the conveying mechanism 4 in Embodiment 1, as follows:

[0048] Specifically, the conveying mechanism 4 includes a drive wheel 42, a pressure wheel 43, a slider B44, a support spring 45, and a drive motor 47. The feeding pipe 1 is symmetrically provided with two wheel grooves 401. Side plates 41 are symmetrically fixed on both sides of the feeding pipe 1. The drive wheel 42 is rotatably mounted between the two side plates 41 via a shaft, and the drive wheel 42 is embedded in one of the wheel grooves 401. The slider B44 is slidably mounted in the vertical grooves 411 on both side plates 41. The pressure wheel 43 is rotatably mounted between the two sliders B44 via a shaft, and the pressure wheel 43 is embedded in the other wheel groove 401. Support springs 45 are fixed on both sliders B44, and the other end of both support springs 45 is fixed to the inner wall of the vertical groove 411. The drive motor 47 is fixed on one side plate 41, and the output shaft of the drive motor 47 is fixed to one side shaft end of the drive wheel 42.

[0049] The wire passes between the drive wheel 42 and the pressure wheel 43. The drive motor 47 drives the drive wheel 42 to rotate, thereby conveying the wire. Due to the elastic force of the support spring 45, the pressure wheel 43 slides down along the vertical groove 411 under the drive of the slider B44 and can closely fit the outer wall of the wire. At the same time, it can press the wire onto the drive wheel 42, so that there is effective driving friction between the wire and the drive wheel 42.

[0050] In addition, the wire diameter fluctuates slightly within the production allowable range. When the wire diameter increases, it will push the pressure roller 43 to move upward, causing the slider B44 to compress the support spring 45 along the vertical groove 411. The elastic force of the support spring 45 reacts to the slider B44, so that the pressure roller 43 always maintains the clamping force on the wire. When the wire diameter decreases, the elastic force of the support spring 45 is released, pushing the slider B44 to drive the pressure roller 43 to move downward, maintaining the fit between the drive wheel 42 and the pressure roller 43. Through the elastic extension and contraction of the support spring 45, the adaptive adjustment of the conveying stability is achieved.

[0051] In addition, a pressure sensor 46 is provided on the inner wall of one of the vertical grooves 411 to detect whether a wire passes between the drive wheel 42 and the pressure wheel 43. The pressure sensor 46 is electrically connected to the control system, and the drive motor 47 is controlled by the control system.

[0052] Because the wire is continuously clamped between the drive wheel 42 and the pressure wheel 43, the pressure wheel 43 is supported by the wire, and the slider B44 maintains a stable position in the vertical groove 411, without directly contacting the pressure sensor 46. The pressure sensor 46 detects pressure and obtains material information from the control system, thereby controlling the conveying mechanism 4 to continue conveying. When there is a shortage of material, the support spring 45 pushes the slider B44 closer to the pressure sensor 46 until the slider B44 presses against the pressure sensor 46. The pressure sensor 46 detects the presence of pressure and feeds it back to the control system. The processor in the control system analyzes and determines that there is a defect, that is, it controls the drive motor 47 to stop running, so that the entire conveying mechanism 4 stops working, avoiding idling and further avoiding energy waste caused by idling.

[0053] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A spring machine cutting device with automatic stop protection against material breakage, comprising a feeding pipe (1), wherein a flange (11) is fixed at the inlet end of the feeding pipe (1) and a mounting bracket (12) is fixed at the outlet end, characterized in that: The mounting bracket (12) is symmetrically and slidably mounted on both sides of the outlet of the feeding pipe (1); The feeding pipe (1) is provided with a drive mechanism (3), a conveying mechanism (4) and a material shortage detection unit (5) in sequence from the mounting bracket (12) to the flange (11); The drive mechanism (3) is used to drive the two blades (2) to move closer or further apart to achieve the cutting action; The conveying mechanism (4) is used to convey the wire in the feeding pipe (1); The material shortage detection unit (5) is used to monitor whether there is a material shortage in the feeding pipe (1); When the material shortage detection unit (5) detects a material shortage, the control system controls the drive mechanism (3) to stop working; The distance between the monitoring point of the material shortage detection unit (5) and the cutting point of the tool (2) is greater than the total length of wire required for spring forming.

2. A spring machine cutting device with automatic stop protection against material breakage as described in claim 1, characterized in that: The material shortage detection unit (5) uses a photoelectric sensor, including a transmitter (53) and a receiver (54); The feeding pipe (1) is symmetrically provided with a pair of mounting slots (51), and mounting plates (52) are installed in both mounting slots (51); The transmitter (53) and receiver (54) are respectively mounted on two mounting plates (52), and a detection zone for wires to pass through is formed between them; The receiver (54) is electrically connected to the control system.

3. A spring machine cutting device with automatic stop protection against material breakage according to claim 2, characterized in that: The mounting groove (51) is an elongated groove that extends along the length of the feeding pipe (1), and the two mounting plates (52) are slidably installed in the corresponding mounting groove (51); The feeding pipe (1) is externally fitted with a ring (55), and the ring (55) has a threaded hole (551). Both mounting plates (52) are fixed to the ring (55). A support plate (56) is fixed on the outer wall of the feeding pipe (1), and an adjusting screw (57) is rotatably installed on the support plate (56); The adjusting screw (57) is threadedly fitted through the threaded hole (551).

4. A spring machine cutting device with automatic stop protection against material breakage as described in claim 1, characterized in that: The drive mechanism (3) includes an annular component (31), a gear ring (32), a connecting rod (34), an electric cylinder (35), and a rack (36); The mounting bracket (12) is symmetrically provided with two sliding grooves (121), and a slider A (33) is slidably installed in each of the two sliding grooves (121); The two cutting tools (2) are respectively fixed on the corresponding slider A (33); The annular component (31) is rotatably mounted on the feeding pipe (1). Two connecting rods (34) are symmetrically hinged on the annular component (31), and the other ends of the two connecting rods (34) are respectively hinged to the corresponding slider A (33). A toothed ring (32) is fixed on the outer periphery of the annular component (31); An electric push cylinder (35) is fixed to the side of the mounting bracket (12) via a mounting seat (122). A rack (36) is fixed to the telescopic end of the electric push cylinder (35), and the rack (36) meshes with the toothed ring (32). The electric push cylinder (35) is controlled by the control system.

5. A spring machine cutting device with automatic stop protection for material breakage according to claim 4, characterized in that: A protective cover (6) is slidably installed on the side of the mounting bracket (12) and above the outlet of the feeding pipe (1); The opening of the protective cover (6) faces downward; A connecting arm (37) is fixed to the side of the rack (36), and the end of the connecting arm (37) is fixed to the side of the protective cover (6).

6. A spring machine cutting device with automatic stop protection against material breakage according to claim 1, characterized in that: The conveying mechanism (4) includes a drive wheel (42), a pressure wheel (43), a slider B (44), a support spring (45), and a drive motor (47); The feeding pipe (1) is symmetrically provided with two wheel grooves (401), and side plates (41) are symmetrically fixed on both sides of the feeding pipe (1); The drive wheel (42) is rotatably mounted between the two side plates (41) via a shaft, and the drive wheel (42) is embedded in one of the wheel grooves (401); Both side plates (41) have vertical grooves (411) in which sliders B (44) are slidably installed; The pressure roller (43) is rotatably mounted between the two sliders B (44) via a shaft, and the pressure roller (43) is embedded in the other wheel groove (401); Both sliders B (44) are fixed with support springs (45), and the other end of both support springs (45) is fixed to the inner wall of the vertical groove (411); A drive motor (47) is fixed on one side plate (41), and the output shaft of the drive motor (47) is fixed to the shaft end of one side of the drive wheel (42).

7. A spring machine cutting device with automatic stop protection for material breakage according to claim 6, characterized in that: A pressure sensor (46) is provided on the inner wall of one side of the vertical groove (411) to detect whether a wire passes between the drive wheel (42) and the pressure wheel (43); The pressure sensor (46) is electrically connected to the control system, and the drive motor (47) is controlled by the control system.

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