Automatic fixed-length cutting equipment for fatigue-resistant plate spring processing

Abstract

The present application relates to the field of plate spring processing, in particular to a kind of automatic fixed-length cutting equipment for fatigue-resistant plate spring processing, plate spring itself is arc, and the arc rate distribution state of its two ends is different, the traditional measurement method is difficult to take the center of plate spring as symmetry reference, accurately determine the actual cutting length under the arc rate distribution state of two ends, lead to the length of the plate spring after cutting and arc rate mismatch, affect its installation precision.By setting the swing carrying arm supported by the elastic telescopic support rod, and installing the guide roller rolling matched with the arc-shaped guide groove at the end, the two side auxiliary rollers can be tightly fitted to the surface of plate spring with different arc rate range, realizing flexible non-damage clamping of plate spring, and the arc rate change of plate spring can be converted into the swing angle of swing carrying arm in real time, providing data for subsequent arc rate symmetry.

Description

Technical Field

[0001] This invention relates to the field of leaf spring processing, specifically to an automatic fixed-length cutting device for processing fatigue-resistant leaf springs. Background Technology

[0002] A leaf spring is a highly elastic, arc-shaped plate structure primarily used as a connection between the passenger compartment and the axle in automobiles, providing support and cushioning for the passenger compartment. During the manufacturing process, leaf springs are typically cut to specified lengths to meet the installation requirements of different vehicle models.

[0003] Traditional leaf spring cutting equipment usually requires manual measurement. The operator first measures and marks the length of the leaf spring, and then cuts it at the marked position using the cutting equipment.

[0004] The following problems exist in the existing technology that have not been well resolved: the leaf spring itself is arc-shaped, and the arc distribution at both ends is different. Traditional measurement methods are difficult to use the center of the leaf spring as a symmetrical reference to accurately determine the actual cutting length of the arc distribution at both ends, resulting in a mismatch between the length and arc of the cut leaf spring ends, which affects its installation accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic fixed-length cutting device for processing fatigue-resistant leaf springs, solving the problem that traditional fixed-length cutting of leaf springs relies on manual marking or mechanical stop positioning, which is difficult to adapt to the problem of inconsistent lengths or poor curvature matching at both ends after cutting due to the asymmetry of curvature caused by processing errors. To achieve the above objective, this invention provides the following technical solution: An automatic fixed-length cutting device for processing fatigue-resistant leaf springs, including a processing station, a fixed-length positioning component is provided on the table of the processing station, the fixed-length positioning component includes a bearing plate installed on the table of the processing station, a center limiting frame is fixed on the processing station perpendicular to the center line of the bearing plate, two arc-shaped guide side plates are arranged opposite each other on the bearing plate with the center limiting frame as the center of symmetry, each arc-shaped guide side plate has an arc guide groove, two swing bearing arms are symmetrically arranged on both sides of the center limiting frame, and one end of each swing bearing arm is connected to the center limiting frame via a hinge shaft. The central limiting frame is rotatably connected, with the other end extending towards the corresponding arc-shaped guide groove and a guide roller installed at the end. The guide roller rolls in cooperation with the arc-shaped guide groove. An elastic telescopic support rod is connected between the swing bearing arm and the bearing base plate. The two ends of the elastic telescopic support rod are respectively hinged to the bearing base plate and the swing bearing arm, providing elastic support for the swing bearing arm. An auxiliary contact plate is slidably installed on the outer wall of each swing bearing arm by means of bolt locking. The auxiliary contact plate is inclined, and multiple auxiliary rollers are installed on its contact surface facing the leaf spring for forming a low-friction rolling contact with the surface of the leaf spring.

[0006] Preferably, an arc rate monitoring component is fixedly installed inside the central limiting frame. The arc rate monitoring component has a central pressure roller on its end face facing the leaf spring for contacting the center of the leaf spring. A transmission link is provided between the monitoring component and the swing bearing arms on both sides. One end of each transmission link is hinged to the corresponding swing bearing arm, and the other end is connected to the arc rate monitoring component.

[0007] Preferably, the arc rate monitoring component further includes a fixed sleeve coaxially mounted at the center of the central limiting frame. The interior of the fixed sleeve is divided into an upper section, a middle section, and a lower section according to its function. In the middle section of the fixed sleeve, two through guide grooves are symmetrically opened radially, corresponding to the transmission connecting rods on both sides respectively. A push slider is slidably arranged in each through guide groove. A sliding connecting plate is fixedly connected to the side of the push slider facing the outside of the fixed sleeve. A transmission pin is fixedly arranged on the sliding connecting plate. Limiting rollers are installed at both ends of the transmission pin. Limiting guide grooves are opened on the outer wall of the fixed sleeve corresponding to the linear movement of the transmission pin. The limiting rollers are embedded in the limiting guide grooves and roll with the limiting guide grooves to ensure that the push slider can only move smoothly along the axis of the sleeve. The middle part of the transmission pin is located between the two guide rollers and is hinged to the corresponding swing bearing arm through the transmission connecting rod.

[0008] Preferably, a detection plate is slidably disposed between the two push sliders perpendicular to their direction of movement. The detection plate can move laterally between the two push sliders. A detection through hole is opened at the center of the detection plate. Wedge-shaped drive blocks are fixedly disposed at both ends of the detection plate. Wedge-shaped guide grooves are correspondingly opened on the two push sliders. The wedge-shaped drive blocks are embedded in the corresponding wedge-shaped guide grooves to form a wedge fit.

[0009] Preferably, an axial sleeve is slidably disposed in the upper half of the fixed sleeve. A central transmission rod is fixedly connected to the end face of the axial sleeve facing the central pressure wheel. The central transmission rod passes through the end wall of the fixed sleeve, and its exposed end is rotatably connected to the central pressure wheel. A conical cavity is formed at the inner wall of the top of the fixed sleeve. A preload spring is provided between the conical cavity and the end face of the axial sleeve to apply an elastic thrust toward the central pressure wheel to the axial sleeve. A trigger rod is fixedly connected to the other end of the axial sleeve away from the central pressure wheel. The axis of the trigger rod coincides with the central axis of the fixed sleeve, and its end corresponds to the position of the detection through hole on the detection plate.

[0010] Preferably, a detection slide cylinder is slidably disposed in the lower half of the fixed sleeve. The detection slide cylinder can move along the axis of the sleeve. A trigger contact rod is fixedly disposed on the end face of the detection slide cylinder facing the trigger rod. The end of the trigger contact rod is disposed opposite to the end of the trigger rod. A return spring is connected between the other end of the detection slide cylinder away from the trigger contact rod and the inner wall of the fixed sleeve. The return spring applies an elastic force to the detection slide cylinder away from the trigger rod. A monitoring indicator rod is fixedly connected to the other end of the detection slide cylinder away from the trigger contact rod. The monitoring indicator rod passes through the bottom end of the fixed sleeve and extends to the outside.

[0011] Preferably, a leaf spring pushing component is also provided in the central area of ​​the processing station facing the fixed-length positioning component, and a cutting unit for performing fixed-length cutting is provided on one side of the processing station located on the fixed-length positioning component after the leaf spring curvature is confirmed.

[0012] Preferably, the leaf spring pushing assembly includes a linear driver fixedly installed at the bottom of the processing station. A movable conveyor is fixedly connected to the movable slide of the linear driver. On the table surface of the processing station, dovetail grooves are symmetrically opened along the leaf spring pushing direction. On the movable conveyor, corresponding to the positions of the two dovetail grooves, guide push plates are fixedly connected. The lower end of the guide push plate passes through the guide groove and extends to the bottom of the table surface to connect with the movable conveyor. Several pushing rollers are installed on the side of the guide push plate facing the leaf spring.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] In this invention, by setting up a swing bearing arm supported by an elastic telescopic support rod and installing guide rollers at its end that roll in cooperation with the arc-shaped guide groove, the auxiliary rollers on both sides can adaptively and tightly fit the surface of the leaf spring with different curvature ranges, thus achieving flexible and damage-free clamping of the leaf spring. It can convert the curvature change of the leaf spring into the swing angle of the swing bearing arm in real time, providing data for subsequent curvature symmetry.

[0015] In this invention, when the swing bearing arm generates a displacement difference due to the curvature of the leaf spring through the push slider, wedge-shaped drive block and detection plate, the displacement difference is converted into the lateral movement of the detection plate through the wedge fit, simplifying whether the curvatures on both sides are consistent to whether the detection through hole deviates from the central axis.

[0016] In this invention, while detecting the symmetry of the arc, the center line of the leaf spring is positioned by the action of the central pressure roller and the auxiliary rollers on both sides. Only when the arc of the leaf spring is symmetrical on both sides can the trigger rod pass smoothly through the detection through hole and drive the monitoring indicator rod to extend, thus avoiding cutting errors caused by arc asymmetry or center offset. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the leaf spring processing flow of the present invention;

[0018] Figure 2 This is a top view of the leaf spring manufacturing process of the present invention;

[0019] Figure 3 This is a cross-sectional view of the processing station in the leaf spring processing flow of this invention;

[0020] Figure 4 This is a bottom view of the leaf spring processing flow in this invention;

[0021] Figure 5 This is a top view of the fixed-length positioning component in this invention;

[0022] Figure 6 This is a three-dimensional structural diagram of the fixed-length positioning component in this invention;

[0023] Figure 7 This is a partial three-dimensional structural diagram of the fixed-length positioning component in this invention;

[0024] Figure 8 This is a top view of a partial three-dimensional structure of the fixed-length positioning component in this invention;

[0025] Figure 9 A cross-sectional view of the fixing sleeve in the arc rate monitoring component of this invention. Figure 1 ;

[0026] Figure 10 This is a partial three-dimensional structural diagram of the arc rate monitoring component in this invention;

[0027] Figure 11 This is a schematic diagram of the detection insert plate, detection through hole, and wedge-shaped drive block in the arc rate monitoring component of the present invention;

[0028] Figure 12 A cross-sectional view of the fixing sleeve in the arc rate monitoring component of this invention. Figure 2 ;

[0029] Figure 13 This is a three-dimensional structural diagram of the axial sliding sleeve, detection sliding cylinder, and detection insert plate in this invention.

[0030] In the diagram: 1. Processing station; 2. Fixed-length positioning assembly; 21. Bearing base plate; 22. Central limiting frame; 23. Arc-shaped guide side plate; 24. Arc-shaped guide groove; 25. Swinging bearing arm; 26. Guide roller; 27. Elastic telescopic support rod; 28. Auxiliary contact plate; 29. ​​Auxiliary roller; 3. Curvature monitoring assembly; 31. Central pressure roller; 32. Transmission connecting rod; 33. Fixed sleeve; 34. Central area; 341. Through guide groove; 342. Push slider; 343. Sliding connecting plate; 344. Transmission pin; 345. Limiting roller; 346. 347. Limiting guide groove; 348. Detection insert plate; 349. Detection through hole; 3410. Wedge-shaped drive block; 3411. Wedge-shaped guide groove; 35. Upper half zone; 351. Axial sliding sleeve; 352. Central transmission rod; 353. Preload spring; 354. Trigger rod; 36. Lower half zone; 361. Detection slide cylinder; 362. Trigger contact rod; 363. Reset spring; 364. Monitoring indicator rod; 4. Leaf spring push assembly; 41. Linear driver; 42. Moving conveyor frame; 43. Dovetail groove; 44. Guide push plate; 45. Push roller; 5. Cutting unit. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example

[0033] Please see Figures 1 to 13 The present invention provides a technical solution: an automatic fixed-length cutting device for processing fatigue-resistant leaf springs, including a fixed-length positioning component 2, which is suitable for precise length cutting in the leaf spring processing flow after determining the arc distribution state at both ends of the leaf spring based on the central symmetry point.

[0034] The fixed-length positioning component 2 is located on the processing station 1 in the leaf spring processing flow. It mainly includes a support base plate 21 installed on the table of the processing station 1. A center limiting frame 22 is fixed on the processing station 1 perpendicular to the center line of the support base plate 21. Two arc-shaped guide side plates 23 are arranged on the support base plate 21 with the center limiting frame 22 as the center of symmetry. Each arc-shaped guide side plate 23 has an arc-shaped guide groove 24, and its radius of curvature matches the expected curvature range of the leaf spring.

[0035] Furthermore, two swing bearing arms 25 are symmetrically arranged on both sides of the central limiting frame 22, and one end of each swing bearing arm 25 is rotatably connected to the central limiting frame 22 through a hinge shaft, while the other end extends toward the corresponding arc-shaped guide groove 24 and is equipped with a guide roller 26 at the end. The guide roller 26 rolls with the arc-shaped guide groove 24 to constrain the swing of the swing bearing arm 25.

[0036] Each swing support arm 25 is connected to the support base plate 21 by an elastic telescopic support rod 27. The two ends of the elastic telescopic support rod 27 are respectively hinged to the support base plate 21 and the swing support arm 25, providing elastic support to the swing support arm 25 so that it tends to swing in the direction of the leaf spring.

[0037] An auxiliary contact plate 28 is slidably installed on the outer wall of each swing bearing arm 25 by means of bolt locking. The position of the auxiliary contact plate 28 can be adjusted along the length of the swing bearing arm 25.

[0038] The auxiliary contact plate 28 is inclined, and multiple auxiliary rollers 29 are installed on its contact surface facing the leaf spring to form a low-friction rolling contact with the leaf spring surface.

[0039] Inside the center limiting frame 22, an arc rate monitoring component 3 is fixedly installed. The arc rate monitoring component 3 has a center pressure roller 31 facing the end face of the leaf spring, which is used to contact the center part of the leaf spring. A transmission link 32 is provided between the monitoring component and the swing bearing arms 25 on both sides. One end of each transmission link 32 is hinged to the corresponding swing bearing arm 25, and the other end is connected to the arc rate monitoring component 3, so as to transmit the swing angle of the swing bearing arm 25 to the arc rate monitoring component 3 in real time.

[0040] Under the action of the elastic telescopic support rod 27, the two swinging support arms 25 swing towards the central limiting frame 22. The auxiliary rollers 29 on the auxiliary contact plate 28 and the central pressure roller 31 on the arc rate monitoring component 3 form the contact area for the leaf spring. The leaf spring moves along the conveying direction and its front end enters the contact area. The center line of the leaf spring first contacts the central pressure roller 31 on the arc rate monitoring component 3. As the leaf spring continues to move forward, the arc surfaces on both sides contact the auxiliary rollers 29 on the two swinging support arms 25 respectively. Under the elastic action of the elastic telescopic support rod 27, the auxiliary rollers 29 on both sides always keep in close contact with the surface of the leaf spring and adapt to the change of the arc rate of the leaf spring. If the curvature of the leaf spring is perfectly symmetrical and its centerline coincides with the point of action of the center pressure roller 31, then the swing angles of the two swing bearing arms 25 around the hinge point are equal. At this time, the displacements transmitted to the curvature monitoring component 3 by the two transmission links 32 are the same. If the leaf spring has a center offset, the swing angles of the two swing bearing arms 25 will differ. The displacement is transmitted to the curvature monitoring component 3 in real time through the transmission links 32, so that the curvature monitoring component 3 can determine the length area to be cut of the leaf spring according to the actual curvature distribution and the position of the centerline. It can cut with the actual center of the leaf spring as the symmetrical point, and the cutting length at both ends matches the curvature.

[0041] In this embodiment, the arc rate monitoring component 3 also includes a fixed sleeve 33 coaxially mounted at the center of the central limiting frame 22. The interior of the fixed sleeve 33 is divided into an upper half 35, a middle half 34, and a lower half 36 according to its function. The middle half 34 of the fixed sleeve 33 has two radially symmetrical through guide grooves 341, which correspond to the transmission connecting rods 32 on both sides respectively. Each through guide groove 341 has a sliding push slider 342 slidably disposed therein. A sliding connecting plate 3 is fixedly connected to the side of the push slider 342 facing the outside of the fixed sleeve 33. 43. A transmission pin 344 is fixedly installed on the sliding connecting plate 343. Limiting rollers 345 are installed at both ends of the transmission pin 344. On the outer wall of the fixed sleeve 33, a limiting guide groove 346 is opened corresponding to the linear movement of the transmission pin 344. The limiting rollers 345 are embedded in the limiting guide groove 346 and roll with the limiting guide groove 346 to ensure that the push slider 342 can only move smoothly along the sleeve axis. The middle part of the transmission pin 344 is located between the two guide rollers 26 and is hinged to the corresponding swing bearing arm 25 through the transmission connecting rod 32.

[0042] Between the two push sliders 342, a detection plate 347 is slidably disposed perpendicular to their direction of movement. The detection plate 347 can move laterally between the two push sliders 342. A detection through hole 348 is opened at the center of the detection plate 347. The edge area of ​​the detection through hole 348 is chamfered to form a guide entrance.

[0043] Both ends of the detection plate 347 are fixedly provided with wedge-shaped drive blocks 349, and the two push sliders 342 are respectively provided with wedge-shaped guide grooves 3410. The wedge-shaped drive blocks 349 are embedded in the corresponding wedge-shaped guide grooves 3410 to form a wedge-shaped fit.

[0044] When the two swing bearing arms 25 swing with the arc of the leaf spring under the action of the elastic telescopic support rod 27, their swing angle is transmitted to the corresponding transmission pin 344 through the transmission connecting rod 32. The transmission pin 344 drives the push slider 342 to slide along the axial direction in the through guide groove 341 of the fixed sleeve 33. The position of the left push slider 342 corresponds to the swing angle of the left swing bearing arm 25, and the position of the right push slider 342 corresponds to the swing angle of the right swing bearing arm 25. The linear displacement of the two push sliders 342 is converted into the lateral movement of the detection plate 347 through the cooperation of the wedge guide groove 3410 on it and the wedge drive blocks 349 at both ends of the detection plate 347.

[0045] If the curvature of the two sides of the center of the leaf spring is the same, the swing angle of the swing bearing arm 25 on both sides is equal, and the two push sliders 342 move the same distance. At this time, the forces of the two wedge drive blocks 349 on the detection plate 347 are balanced, the detection plate 347 is kept in the center position, and the detection through hole 348 on it is located on the central axis of the fixed sleeve 33.

[0046] If the curvatures on both sides of the leaf spring are inconsistent, the swing angles of the two bearing arms will be unequal, and the two push sliders 342 will move different distances. The displacement difference will cause the detection plate 347 to move laterally to one side through the wedge fit. At this time, the detection through hole 348 on the detection plate 347 will deviate from the central axis of the fixed sleeve 33, and the offset will directly correspond to the curvatures on both sides of the leaf spring.

[0047] In this embodiment, an axial sliding sleeve 351 is slidably disposed in the upper half region 35 of the fixed sleeve 33. A central transmission rod 352 is fixedly connected to the end face of the axial sliding sleeve 351 facing the central pressure roller 31. The central transmission rod 352 passes through the end wall of the fixed sleeve 33, and its exposed end is rotatably connected to the central pressure roller 31 to realize the bearing of the central pressure roller 31.

[0048] A conical cavity is provided on the inner wall of the top end of the fixed sleeve 33. A preload spring 353 is provided between the conical cavity and the end face of the axial sliding sleeve 351 to apply an elastic thrust to the axial sliding sleeve 351 in the direction of the central pressure wheel 31. A trigger rod 354 is fixedly connected to the other end of the axial sliding sleeve 351 away from the central pressure wheel 31. The axis of the trigger rod 354 coincides with the central axis of the fixed sleeve 33, and its end corresponds to the position of the detection through hole 348 on the detection insert plate 347.

[0049] Within the lower half 36 of the fixed sleeve 33, a detection slide cylinder 361 is slidably disposed. The detection slide cylinder 361 can move along the sleeve axis. A trigger contact rod 362 is fixedly disposed on the end face of the detection slide cylinder 361 facing the trigger rod 354. The end of the trigger contact rod 362 is positioned opposite to the end of the trigger rod 354. A return spring 363 is connected between the other end of the detection slide cylinder 361 away from the trigger contact rod 362 and the inner wall of the fixed sleeve 33. The return spring 363 applies an elastic force to the detection slide cylinder 361 away from the trigger rod 354. A monitoring indicator rod 364 is fixedly connected to the end of the detection slide cylinder 361 away from the trigger contact rod 362. The monitoring indicator rod 364 passes through the bottom end of the fixed sleeve 33 and extends to the outside. Its exposed length can visually reflect the axial position of the detection slide cylinder 361.

[0050] When the leaf spring is sent into the testing station, its center part first contacts and squeezes the center pressure roller 31. After the center pressure roller 31 is compressed, it pushes the axial sleeve 351 to overcome the elastic force of the pre-tightening spring through the center transmission rod 352 and retracts into the fixed sleeve 33. At this time, the pre-tightening spring is in a compressed and stored state, and the trigger rod 354 at the other end of the axial sleeve 351 extends towards the testing plate 347.

[0051] When the swing bearing arms 25 on both sides swing with the curvature of the leaf spring, the push slider 342 drives the detection plate 347 to generate lateral displacement. The position of the detection through hole 348 on the detection plate 347 reflects the symmetry of the curvature on both sides of the leaf spring.

[0052] If the curvature of the leaf spring is symmetrical on both sides, the detection plate 347 is in the center position, and the detection through hole 348 on it coincides with the central axis of the fixed sleeve 33. The axial sliding sleeve 351 in the compressed state pushes the trigger rod 354 to pass smoothly through the detection through hole 348 and continue to descend until it contacts the trigger contact rod 362 of the lower half of the region 36. This pushes the detection sliding cylinder 361 to move downward against the elastic force of the return spring 363, thereby driving the monitoring indicator rod 364 to extend out of the fixed sleeve 33. The extension of the monitoring indicator rod 364 serves as a qualified signal, allowing the operator to proceed to the next step. Alternatively, a proximity switch or photoelectric sensor can be added at the end of the stroke of the monitoring indicator rod 364 to provide a signal for fixed-length cutting.

[0053] If the curvatures on both sides of the leaf spring are asymmetrical, the detection plate 347 will shift laterally and the detection through hole 348 on it will deviate from the central axis. At this time, the trigger rod 354, which is in a compressed state, will not be able to align with the through hole when it moves downward. Its end will be blocked by the solid part of the detection plate 347 and will not be able to continue to move downward to contact the trigger contact rod 362.

[0054] The detection slide 361 remains in the upper position under the action of the return spring 363, and the monitoring indicator rod 364 retracts into the fixed sleeve 33. The operator can fine-tune the placement position of the leaf spring according to the offset direction of the detection insert 347 until the trigger rod 354 can pass smoothly through the detection through hole 348, so that the trigger indicator rod extends and the leaf spring curvature is adjusted to a symmetrical and qualified state.

[0055] In this embodiment, a leaf spring pushing component 4 is also provided in the central area of ​​the processing station 1 in the direction of the fixed length positioning component 2, and a cutting unit 5 is provided on one side of the processing station 1 located on the fixed length positioning component 2 for performing fixed length cutting after the leaf spring curvature is confirmed.

[0056] The leaf spring pushing assembly 4 includes a linear driver 41 fixedly installed at the bottom of the processing station 1. The linear driver 41 is preferably a servo electric cylinder or a ball screw slide module. A movable conveyor frame 42 is fixedly connected to the movable slide of the linear driver 41. On the table surface of the processing station 1, dovetail grooves 43 are symmetrically opened along the leaf spring pushing direction. On the movable conveyor frame 42, corresponding to the positions of the two dovetail grooves 43, a guide push plate 44 is fixedly connected. The lower end of the guide push plate 44 passes through the guide groove and extends to the bottom of the table surface to connect with the movable conveyor frame 42. Several pushing rollers 45 are installed on the side of the guide push plate 44 facing the leaf spring.

[0057] The operator or loading robot places the leaf spring to be tested on the table of processing station 1. The leaf spring is located between the fixed length positioning component 2 and the pushing component. The linear driver 41 is started, driving the moving conveyor 42 to move along the dovetail groove 43 towards the fixed length positioning component 2. The pushing roller 45 on the moving conveyor 42 first contacts the leaf spring, pushing the entire leaf spring towards the central pressure roller 31. During the movement of the leaf spring, its central part gradually approaches and finally contacts the central pressure roller 31 to apply pressure to the axial sliding sleeve 351. At the same time, the arc surfaces on both sides of the leaf spring gradually contact the auxiliary rollers 29 on the swing bearing arms 25 on both sides. The pushing roller 45 elastically presses the leaf spring between the central pressure roller 31 and the auxiliary roller 29. Both the auxiliary roller 29 and the central pressure roller 31 can rotate, and the swing bearing arm 25 is provided with elastic support by the elastic telescopic support rod 27. The leaf spring can reciprocate along the length direction, and its arc rate change can be sensed by the swing bearing arms 25 on both sides, realizing the monitoring and confirmation of the arc rate of the leaf spring during the movement.

[0058] After the curvature is confirmed, the cutting unit 5 located on one side of the fixed length positioning component 2 performs cutting on the leaf spring that is in a qualified positioning state according to the fixed length parameters of the leaf spring.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic fixed-length cutting device for processing fatigue-resistant leaf springs, characterized in that, It includes a processing station (1), on which a carrier substrate (21) is provided. The center limiting frame (22) is fixedly mounted on the support base plate (21); Two arc-shaped guide side plates (23) are arranged opposite each other on the bearing base plate (21) with the central limiting frame (22) as the center of symmetry. Each arc-shaped guide side plate (23) has an arc-shaped guide groove (24). Two swing bearing arms (25) are symmetrically arranged on both sides of the central limiting frame (22). One end of each swing bearing arm (25) is rotatably connected to the central limiting frame (22), and the other end is provided with a guide roller (26). The guide roller (26) is in rolling cooperation with the corresponding arc-shaped guide groove (24). Two elastic telescopic support rods (27), each elastic telescopic support rod (27) is connected between the corresponding swing bearing arm (25) and the bearing base plate (21); Two auxiliary contact plates (28) are slidably installed on the outer wall of each swing bearing arm (25). The auxiliary contact plates (28) are provided with multiple auxiliary rollers (29) for contacting the surface of the leaf spring. The arc rate monitoring component (3) is set on the central limiting frame (22), and a central pressure roller (31) is provided on the end face of the arc rate monitoring component (3) facing the leaf spring. Two transmission links (32) are connected at one end to the corresponding swing bearing arm (25) and at the other end to the arc rate monitoring component (3). The transmission links (32) are used to transmit the swing angle of the swing bearing arm (25) to the arc rate monitoring component (3).

2. An automatic fixed-length cutting device for processing fatigue-resistant leaf springs according to claim 1, characterized in that: The arc rate monitoring component (3) includes: The fixed sleeve (33) is coaxially installed at the center of the central limiting frame (22). The interior of the fixed sleeve (33) is divided into an upper half (35), a middle half (34) and a lower half (36) along the axial direction. Two through guide grooves (341) are symmetrically opened radially on the cylinder wall of the upper middle area (34) of the fixed sleeve (33); Two push sliders (342) are respectively slidably set in the corresponding through guide grooves (341); Two sliding connecting plates (343), each sliding connecting plate (343) is fixedly connected to the side of the corresponding push slider (342) facing the outside of the fixed sleeve (33); Two transmission pins (344) are fixedly mounted on a corresponding sliding connecting plate (343), and the transmission pins (344) are hinged to the corresponding transmission connecting rod (32); Two limiting guide grooves (346) are formed on the outer wall of the fixed sleeve (33) and extend along the axial direction of the fixed sleeve (33); Multiple limiting rollers (345) are installed at both ends of each transmission pin (344), and the limiting rollers (345) are embedded in the corresponding limiting guide grooves (346).

3. An automatic fixed-length cutting device for processing fatigue-resistant leaf springs according to claim 2, characterized in that: The radian rate monitoring component (3) also includes: The detection plate (347) is laterally positioned between the two push sliders (342), and the direction of movement of the detection plate (347) is perpendicular to the sliding direction of the push sliders (342). The detection through hole (348) is located at the center of the detection insert plate (347); Two wedge-shaped drive blocks (349) are fixedly installed at both ends of the detection plate (347); Two wedge-shaped guide grooves (3410) are respectively opened on two push sliders (342), and each wedge-shaped guide groove (3410) slides in cooperation with the corresponding wedge-shaped drive block (349).

4. An automatic fixed-length cutting device for processing fatigue-resistant leaf springs according to claim 3, characterized in that: The radian rate monitoring component (3) also includes: The axial sliding sleeve (351) is slidably disposed in the upper half (35) of the fixed sleeve (33); The central drive rod (352) has one end connected to the end face of the axial sliding sleeve (351) facing the central pressure wheel (31), and the other end of the central drive rod (352) passes through the fixed sleeve (33) and is rotatably connected to the central pressure wheel (31). A preload spring (353) is disposed between the inner wall of the top end of the fixed sleeve (33) and the axial sliding sleeve (351); The trigger rod (354) has one end fixedly connected to the end face of the axial sliding sleeve (351) away from the central pressure roller (31). The axis of the trigger rod (354) coincides with the central axis of the fixed sleeve (33). The other end of the trigger rod (354) extends to the middle area (34) and corresponds to the position of the detection through hole (348) on the detection insert plate (347).

5. An automatic fixed-length cutting device for processing fatigue-resistant leaf springs according to claim 4, characterized in that: The radian rate monitoring component (3) also includes: The detection slide (361) is slidably set in the lower half (36) of the fixed sleeve (33); The trigger contact rod (362) is fixedly set on the end face of the detection slide cylinder (361) facing the trigger top rod (354), and the end of the trigger contact rod (362) is set opposite to the end of the trigger top rod (354); A reset spring (363) is disposed between the end of the detection slide (361) away from the trigger contact rod (362) and the inner wall of the fixed sleeve (33); The monitoring indicator rod (364) has one end fixedly connected to the end face of the detection slide (361) away from the trigger contact rod (362), and the other end of the monitoring indicator rod (364) passes through the bottom end of the fixed sleeve (33) and extends to the outside.

6. An automatic fixed-length cutting device for processing fatigue-resistant leaf springs according to claim 1, characterized in that: The processing station (1) is also equipped with a leaf spring pushing assembly (4); The leaf spring pushing assembly (4) is set on the processing station (1) and faces the center limit frame (22). The leaf spring pushing assembly (4) is used to push the leaf spring to the position where it contacts the center pressure roller (31) and the auxiliary roller (29).

7. An automatic fixed-length cutting device for processing fatigue-resistant leaf springs according to claim 6, characterized in that: The leaf spring push assembly (4) includes: A linear actuator (41) is fixedly installed at the bottom of the machining station (1); The movable conveyor (42) is connected to the movable slide of the linear drive (41); Two dovetail grooves (43) are symmetrically opened on the table of the processing station (1), and the dovetail grooves (43) extend along the pushing direction of the leaf spring; The guide push plate (44) is fixedly connected to the movable conveyor frame (42). The lower end of the guide push plate (44) passes through the dovetail groove (43) and extends to the bottom of the table of the processing station (1). Multiple push rollers (45) are mounted on the side of the guide push plate (44) facing the leaf spring.

8. An automatic fixed-length cutting device for processing fatigue-resistant leaf springs according to claim 1, characterized in that: The processing station (1) is also equipped with a leaf spring pushing assembly (4); The cutting unit (5) is set on the processing station (1) and located on one side of the central limiting frame (22). The cutting unit (5) is used to perform fixed-length cutting after the leaf spring curvature is confirmed.

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