A leaf spring forming device and its usage method

Abstract

The present invention discloses a leaf spring forming device and its use method, including a frame and an annular conveying mechanism. A plurality of lifting mechanisms are evenly arranged at the conveying end of the annular conveying mechanism, and an arc pressing and forming mechanism is connected to the lifting end of the lifting mechanism; along the length direction of the upper surface of the frame, a blanking mechanism, a pre-bending mechanism and an ear forming mechanism are sequentially arranged; two guide rails are symmetrically arranged on the upper surface of the frame, a placing plate is slidably installed on the surface of the guide rails, and a pushing driving assembly is arranged on the upper surface of the frame; a bearing vertical plate is arranged on the upper surface of the placing plate, a material pushing hydraulic cylinder is installed outside the bearing vertical plate, and a material pushing plate is connected to the working end of the material pushing hydraulic cylinder. The beneficial effects are as follows: It can sequentially realize the blanking of the connecting through holes and the length of the leaf spring, the pre-bending of the ears, the ear forming and the arc pressing and forming processes, with a production line type production, without the need for multiple heating to red heat, saving energy, having high production efficiency and good safety.

Description

Technical Field

[0001] The present invention relates to the technical field of leaf spring production devices, and particularly relates to a leaf spring forming device and a using method thereof. Background Art

[0002] Leaf springs are one of the most widely used elastic elements in automobile suspensions. During the production process of leaf springs, punching of connection through holes and length, pre-bending of coil ears, coil ear forming, and overall arc forming are required. However, in the current production process of leaf springs, each process is an independent process, and the processes are not coherent. Multiple times of heating are required, resulting in serious energy waste and low production efficiency. Manual transfer is required between processes, posing a safety hazard. Summary of the Invention

[0003] The purpose of the present invention is to provide a leaf spring forming device to solve the above problems, that is, in the current production process of leaf springs in the prior art, each process is an independent process, the processes are not coherent, multiple times of heating are required, resulting in serious energy waste and low production efficiency; manual transfer is required between processes, posing a safety hazard and other technical problems. Among the many technical solutions provided by the present invention, the preferred technical solution can sequentially implement the punching of connection through holes and length, pre-bending of coil ears, coil ear forming, and arc forming processes of leaf springs, with a pipeline production method, without multiple times of heating, saving energy, high production efficiency, and being able to achieve automatic transfer between processes, with good safety, as described in detail below.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A leaf spring forming device provided by the present invention includes a frame and a ring conveyor mechanism. The frame and the ring conveyor mechanism are linearly distributed. A plurality of lifting mechanisms are evenly arranged at the conveying end of the ring conveyor mechanism. The lifting end of the lifting mechanism is connected to an arc forming mechanism for performing the arc forming process of the leaf spring.

[0006] Along the length direction of the upper surface of the frame, a punching mechanism, a pre-bending mechanism, and a coil ear forming mechanism are sequentially arranged, respectively performing the punching of connection through holes and length, pre-bending of coil ears, and coil ear forming of the leaf spring.

[0007] On the upper surface of the frame, two guide rails are symmetrically arranged. The guide rails extend along the length direction of the frame. A placement plate is slidably mounted on the surface of the guide rails. On the upper surface of the frame, a pushing drive assembly is provided for driving the placement plate to slide on the surface of the guide rails to sequentially perform the punching processes of connection through holes and lengths, the pre-bending process of the ear curls, and the forming process of the ear curls. On the surface of the placement plate, positioning holes are provided. Inside the positioning holes, tapered positioning posts are installed through supporting springs. On the upper surface of the placement plate, a bearing vertical plate is provided. Outside the bearing vertical plate, a pushing hydraulic cylinder is installed. The working end of the pushing hydraulic cylinder penetrates the bearing vertical plate along the length direction of the frame and is connected to a pushing plate for pushing the leaf spring from the placement plate into the arc-forming mechanism.

[0008] Preferably, the pushing drive assembly includes a mounting plate. The mounting plate is mounted outside the frame. A pushing motor is mounted outside the mounting plate. The output end of the pushing motor penetrates the mounting plate and is connected to a pushing lead screw. The pushing lead screw is parallel to the guide rails and is located between the two guide rails. A pushing slider is installed outside the pushing lead screw through a thread. The pushing slider is connected to the placement plate.

[0009] Preferably, on the upper surface of the frame, a punching sliding groove, a pre-bending sliding groove, and a forming sliding groove are sequentially arranged along its length direction. The punching sliding groove, the pre-bending sliding groove, and the forming sliding groove all extend along the width direction of the frame and respectively correspond to the punching mechanism, the pre-bending mechanism, and the ear curl forming mechanism.

[0010] The punching mechanism includes a punching top plate and punching bottom sliders. There are two punching bottom sliders in total, which are symmetrically and slidably mounted inside the punching sliding groove. The upper surface of the punching bottom sliders is flush with the surface of the frame and is connected to a punching bearing seat. The surface of the punching bearing seat is flush with the surface of the placement plate. A knife groove is provided on the upper surface of the punching bearing seat. On the bottom surface of the frame, a second punching drive assembly is provided for driving the two punching bottom sliders to slide towards or away from each other inside the punching sliding groove.

[0011] The blanking top plate is installed on the surface of the frame through columns and is located above the blanking sliding groove. A blanking hydraulic cylinder is installed on the upper surface of the blanking top plate. The output end of the blanking hydraulic cylinder vertically penetrates the blanking top plate downward and is connected to a blanking lifting plate. A punching column is arranged on the bottom surface of the blanking lifting plate. The punching column corresponds to the positioning hole and is used for punching the connecting through holes of the leaf spring. A blanking adjustment groove corresponding to the blanking sliding groove is penetrated through the surface of the blanking lifting plate. Two blanking upper sliders are symmetrically and slidably installed inside the blanking adjustment groove. A first blanking driving component for driving the two blanking upper sliders to slide towards or away from each other inside the blanking adjustment groove is arranged on the upper surface of the blanking lifting plate. The bottom surface of the blanking upper slider penetrates out of the blanking adjustment groove and is connected to a cutting knife. The cutting knife corresponds to the knife groove.

[0012] Preferably, the pre-bending mechanism includes a bending bottom slider and a bending top plate. There are two bending bottom sliders in total, which are symmetrically and slidably installed inside the pre-bending sliding groove. A second bending driving component for driving the two bending bottom sliders to slide towards or away from each other inside the pre-bending sliding groove is arranged on the bottom surface of the frame. A bending support hydraulic cylinder is installed on the upper surface of the bending bottom slider. The output end of the bending support hydraulic cylinder is vertically upward and is connected to a bending support roller. The bending support roller extends along the length direction of the frame.

[0013] The bending top plate is installed on the upper surface of the frame through columns and is located above the pre-bending sliding groove. A bending hydraulic cylinder is installed on the upper surface of the bending top plate. The output end of the bending hydraulic cylinder vertically penetrates the bending top plate downward and is connected to a bending lifting plate. A bending adjustment groove corresponding to the pre-bending sliding groove is penetrated through the surface of the bending lifting plate. Two bending upper sliders are symmetrically and slidably installed inside the bending adjustment groove. A first bending driving component for driving the two bending upper sliders to slide towards or away from each other inside the bending adjustment groove is arranged on the upper surface of the bending lifting plate. The bottom end of the bending upper slider is connected to a bending pressing roller. The bending pressing roller is parallel to the bending support roller and is used for cooperating to bend the end of the steel plate.

[0014] Preferably, the ear forming mechanism includes an ear top plate and an ear slider. The ear top plate is installed on the upper surface of the frame through columns and is located above the forming sliding groove. An ear hydraulic cylinder is installed on the upper surface of the ear top plate. The output end of the ear hydraulic cylinder vertically penetrates the ear top plate downward and is connected to an ear pressing plate.

[0015] There are two ear-shaped sliders which are symmetrically and slidably installed inside the forming sliding groove. A ear-shaped driving assembly for driving the two ear-shaped sliders to slide towards or away from each other inside the forming sliding groove is arranged on the bottom surface of the frame. The upper surface of the ear-shaped slider is flush with the upper surface of the frame and is connected with an ear-shaped sliding table. A forming die and a fixing frame are installed on the upper surface of the ear-shaped sliding table. Insertion cavities are arranged on the facing surfaces of the two forming dies. The inner bottom surface of the insertion cavity is flush with the upper surface of the placing plate. A semicircular forming cavity is communicated with the inner wall of the insertion cavity.

[0016] A ear-shaped through hole is arranged through the side surface of the fixing frame close to the forming die. The ear-shaped through hole is coaxial with the forming cavity. An ear-shaped positioning hydraulic cylinder is installed on the outer side of the fixing frame away from the forming die. The output end of the ear-shaped positioning hydraulic cylinder extends into the fixing frame and is connected with an ear-shaped positioning shaft. The ear-shaped positioning shaft is coaxial with the ear-shaped through hole.

[0017] Guide shafts are evenly embedded in the inner wall of the forming cavity.

[0018] An ear-shaped limiting plate is arranged on the side surface of the forming die away from the fixing frame. An ear-shaped limiting hole is arranged inside the ear-shaped limiting plate. The ear-shaped limiting hole is coaxial with the ear-shaped positioning shaft and has a clearance fit.

[0019] Preferably, the first blanking driving assembly and the first bending driving assembly have the same structure. The first blanking driving assembly includes a protective box which is installed on the upper surface of the blanking lifting plate and is connected with the output end of the blanking hydraulic cylinder. A first double-shaft motor is installed inside the protective box. The two output ends of the first double-shaft motor are respectively connected with a first upper driving lead screw and a second upper driving lead screw. The thread directions of the first upper driving lead screw and the second upper driving lead screw are opposite. First upper moving seats and second upper moving seats are respectively installed on the outer sides of the first upper driving lead screw and the second upper driving lead screw through threads. The first upper moving seat and the second upper moving seat are respectively connected with the two blanking upper sliders.

[0020] Fixing plates are installed on the upper surface of the blanking lifting plate. There are two fixing plates which are respectively in contact with the first upper moving seat and the second upper moving seat. A clamping hydraulic cylinder is installed on the side surface of the fixing plate close to the blanking adjustment groove. The output end of the clamping hydraulic cylinder extends horizontally and is connected with a transmission plate. The bottom end of the transmission plate extends vertically and is connected with a positioning clamping plate. The positioning clamping plate and the transmission plate are in an inverted "T" shape structure for clamping and positioning the first upper moving seat and the second upper moving seat in cooperation with the fixing plate.

[0021] Preferably, the second blanking drive assembly, the second bending drive assembly and the ear curling drive assembly have the same structure. The second blanking drive assembly includes a second biaxial motor mounted on the bottom surface of the frame. Two output ends of the second biaxial motor are respectively connected with a first bottom drive lead screw and a second bottom drive lead screw. The thread directions of the first bottom drive lead screw and the second bottom drive lead screw are opposite. A first bottom moving seat and a second bottom moving seat are respectively mounted on the outer sides of the first bottom drive lead screw and the second bottom drive lead screw through threads. The first bottom moving seat and the second bottom moving seat are respectively connected with two blanking bottom sliders.

[0022] Preferably, the annular conveying mechanism includes a conveying frame. Two layers of conveying bearing plates are mounted on the upper surface of the conveying frame. Two conveying sprockets are symmetrically and rotatably mounted on the upper surfaces of the two conveying bearing plates. A conveying drive shaft is connected between two vertically distributed conveying sprockets. A conveying motor is mounted on the upper surface of the upper conveying bearing plate. The output end of the conveying motor is connected with any one of the conveying drive shafts. A conveying chain is drivingly connected between two horizontally distributed conveying sprockets. The surface of the conveying chain is evenly connected with conveying connecting plates for mounting the lifting mechanism.

[0023] Support pulleys are evenly mounted on the bottom surface of the conveying chain.

[0024] The lifting mechanism includes a lifting bearing plate. The back surface of the lifting bearing plate is connected with the conveying connecting plate. A lifting fixing frame is mounted on the surface of the lifting bearing plate. A lifting motor is mounted on the upper surface of the lifting fixing frame. A vertical lifting lead screw and a lifting guide post are mounted inside the lifting fixing frame. The lifting lead screw is connected with the output end of the lifting motor. A lifting connecting plate for mounting the arc pressing and forming mechanism is mounted on the outer side of the lifting lead screw through threads.

[0025] Preferably, the arc pressing and forming mechanism includes an arc pressing gantry, which is connected to the lifting end of the lifting mechanism. The bottom surface of the gantry is connected with an arc pressing bearing frame. An arc pressing motor is installed on the upper surface of the gantry. An arc pressing lead screw is rotatably installed inside the gantry, and the arc pressing lead screw is connected to the conveying end of the arc pressing motor. An arc pressing lifting rod is installed on the outer side of the arc pressing lead screw through threads. The bottom surface of the arc pressing lifting rod is connected with an arc pressing guiding column. The bottom end of the arc pressing guiding column extends into the arc pressing bearing frame and is connected with an arc pressing lifting plate. The bottom surface of the arc pressing lifting plate is evenly connected with lifting fork-shaped frames. Upper arc pressing rollers are installed on the surfaces of all the lifting fork-shaped frames. All the upper arc pressing rollers are distributed in an arc shape. The inner bottom surface of the arc pressing bearing frame is evenly connected with fixed fork-shaped frames. The fixed fork-shaped frames and the lifting fork-shaped frames are distributed alternately. Bottom arc pressing rollers are installed on the surfaces of all the fixed fork-shaped frames. All the bottom arc pressing rollers are distributed in an arc shape, and are used to cooperate with the upper arc pressing rollers to integrally press and form the leaf spring;

[0026] Both the inner ends of the upper arc pressing rollers and the bottom arc pressing rollers are connected with fixing bolts. The inner ends of the fixing bolts pass through the middle slots of the lifting fork-shaped frames or the fixed fork-shaped frames, and fixing nuts are installed through threads, which are used to cooperate with the fixing bolts to realize the height adjustment and locking fixation of the upper arc pressing rollers and the bottom arc pressing rollers.

[0027] The using method of the leaf spring forming equipment includes the following steps:

[0028] a. Place an annular oil cooling tank outside the annular conveying mechanism, make the oil cooling tank located directly below the arc pressing and forming mechanism, and add cooling oil into the oil cooling tank;

[0029] b. Place the red-hot steel plate on the surface of the placing plate, make the steel plate contact with the pushing plate, use the gravity of the steel plate to press down the positioning column, overcome the elastic force of the supporting spring, and make the positioning column completely enter the positioning hole;

[0030] c. Drive the placing plate to slide on the guide rail through the pushing driving assembly, send the steel plate into the blanking mechanism, and cut both ends of the steel plate through the blanking mechanism and punch a connecting through hole in the center of the steel plate;

[0031] The connecting through hole is coaxial with the positioning hole. After blanking, use the elastic force of the supporting spring to support the positioning column upward, make the positioning column insert into the connecting through hole and eject the blanking waste, and position the steel plate through the cooperation of the positioning column and the connecting through hole to ensure the stability of the steel plate;

[0032] d. Drive the placing plate to slide on the surface of the guide rail through the pushing drive assembly, feed the blanked steel plate into the pre-bending mechanism, and pre-bend both ends of the blanked steel plate through the pre-bending mechanism;

[0033] e. Drive the placing plate to slide on the surface of the guide rail through the pushing drive assembly, feed the pre-bent steel plate into the ear-forming mechanism, and synchronously form ears at both ends of the steel plate through the ear-forming mechanism;

[0034] f. Drive the lifting mechanism to move through the annular conveying mechanism, drive the arc-forming mechanism to lift and lower through the lifting mechanism, so that the arc-forming mechanism corresponds to the placing plate on which the steel plate with ears formed is placed;

[0035] The pushing hydraulic cylinder pushes the steel plate through the pushing plate. The positioning column has a conical structure. The steel plate exerts a downward component force on the positioning column, overcoming the elastic force of the supporting spring, so that the positioning column completely enters the positioning hole, thereby pushing the steel plate with ears formed from the placing plate into the arc-forming mechanism;

[0036] g. Drive the placing plate to slide reversely on the surface of the guide rail through the pushing drive assembly to return the placing plate to its original position;

[0037] Form an arc on the steel plate through the arc-forming mechanism. After the arc-forming is completed, drive the arc-forming mechanism to descend through the lifting mechanism, so that the steel plate spring is completely immersed in the cooling oil in the oil cooling tank to perform oil cooling on the steel plate spring.

[0038] The beneficial effects are as follows: It can sequentially realize the punching of the connecting through holes and the length of the steel plate spring, the pre-bending and ear-forming of the ears, and the arc-forming process. It is a pipeline production method, without multiple times of heating to red heat, saving energy, having high production efficiency, being able to realize automatic transfer between processes, and having good safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0041] Figure 2 is a top view cross-sectional view of the present invention;

[0042] Figure 3 is the right side view sectional view of the frame of the present invention;

[0043] Figure 4 is the enlarged schematic view of a partial right side view sectional view of the frame of the present invention;

[0044] Figure 5 is the schematic structural view of the blanking mechanism of the present invention;

[0045] Figure 6 is the enlarged right side view sectional view of the blanking lifting plate of the present invention;

[0046] Figure 7 is the schematic structural view of the pre-bending mechanism of the present invention;

[0047] Figure 8 is the schematic structural view of the ear-rolling forming mechanism of the present invention;

[0048] Figure 9 is Figure 8 the enlarged view of part A of;

[0049] Figure 10 is the enlarged partial right side view sectional view of the ear-rolling forming mechanism of the present invention;

[0050] Figure 11 is the three-dimensional structural view of the annular conveying mechanism of the present invention;

[0051] Figure 12 is Figure 11 the enlarged view of part B of;

[0052] Figure 13 is the front view of the lifting mechanism of the present invention;

[0053] Figure 14 is the side view sectional view of the lifting mechanism of the present invention;

[0054] Figure 15 is the three-dimensional structural view of the arc-pressing forming mechanism of the present invention;

[0055] Figure 16 is the front view of the arc-pressing forming mechanism of the present invention;

[0056] Figure 17 is the enlarged rear view of the arc-pressing bearing frame of the present invention;

[0057] Figure 18 is the schematic view of the steel plate spring forming of the present invention.

[0058] The description of the reference numerals is as follows:

[0059] 1. Frame; 101. Blanking sliding groove; 102. Pre-bending sliding groove; 103. Forming sliding groove; 2. Guide rail; 3. Pushing drive assembly; 301. Mounting plate; 302. Pushing motor; 303. Pushing slider; 304. Pushing lead screw; 4. Pushing hydraulic cylinder; 5. Placing plate; 501. Positioning hole; 6. Blanking mechanism; 601. Blanking hydraulic cylinder; 602. Blanking top plate; 603. First blanking drive assembly; 6031. First upper moving seat; 6032. First upper drive lead screw; 6033. Protective box; 6034. First double-shaft motor; 6035. Second upper drive lead screw; 6036. Second upper moving seat; 6037. Fixed plate; 6038. Clamping hydraulic cylinder; 6039. Transmission plate; 6040. Positioning clamping plate; 604. Blanking lifting plate; 6041. Blanking adjustment groove; 605. Second blanking drive assembly; 6051. Second double-shaft motor; 6052. First bottom drive lead screw; 6053. First bottom moving seat; 6054. Second bottom drive lead screw; 6055. Second bottom moving seat; 606. Blanking bottom slider; 607. Blanking bearing seat; 6071. Knife groove; 608. Cutting knife; 609. Blanking upper slider; 610. Punching column; 7. Pre-bending mechanism; 701. Bending hydraulic cylinder; 702. Bending top plate; 703. First bending drive assembly; 704. Bending lifting plate; 7041. Bending adjustment groove; 705. Second bending drive assembly; 706. Bending bottom slider; 707. Bending support hydraulic cylinder; 708. Bending support roller; 709. Bending pressing roller; 710. Bending upper slider; 8. Ear-rolling forming mechanism; 801. Ear-rolling hydraulic cylinder; 802. Ear-rolling top plate; 803. Ear-rolling pressing plate; 804. Forming die; 8041. Insertion cavity; 8042. Forming cavity; 8043. Guide shaft; 805. Ear-rolling drive assembly; 806. Fixed frame; 8061. Ear-rolling through hole; 807. Ear-rolling positioning hydraulic cylinder; 808. Ear-rolling slider; 809. Ear-rolling sliding table; 810. Ear-rolling positioning shaft; 811. Ear-rolling limit plate; 8111. Ear-rolling limit hole; 9. Ring-shaped conveying mechanism; 901. Conveying frame; 902. Conveying bearing plate; 903. Conveying sprocket; 904. Conveying chain; 905. Conveying motor; 906. Conveying drive shaft; 907. Conveying connecting plate; 908. Support pulley; 10. Lifting mechanism; 1001. Lifting motor; 1002. Lifting fixed frame; 1003. Lifting bearing plate; 1004. Lifting guide post; 1005. Lifting connecting plate; 1006. Lifting lead screw; 11. Arc-pressing forming mechanism; 1101. Arc-pressing motor; 1102. Arc-pressing portal frame; 1103. Arc-pressing bearing frame; 1104. Bottom arc-pressing roller; 1105. Upper arc-pressing roller; 1106. Arc-pressing guide post; 1107. Arc-pressing lead screw; 1108. Arc-pressing lifting rod; 1109. Arc-pressing lifting plate; 1110. Fixed fork-shaped frame; 1111. Lifting fork-shaped frame; 1112. Fixed bolt;1113. Fixed nut; 12. Bearing vertical plate; 13. Pushing plate; 14. Supporting spring; 15. Positioning column; Detailed implementation manner

[0060] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present invention.

[0061] See Figures 1 - 17 As shown, the present invention provides a leaf spring forming device, which includes a frame 1 and an annular conveying mechanism 9. The frame 1 and the annular conveying mechanism 9 are linearly distributed. A plurality of lifting mechanisms 10 are evenly arranged at the conveying end of the annular conveying mechanism 9. The lifting end of the lifting mechanism 10 is connected with an arc pressing and forming mechanism 11 for performing the arc pressing and forming process of the leaf spring;

[0062] An blanking mechanism 6, a pre-bending mechanism 7 and an ear forming mechanism 8 are sequentially arranged on the upper surface of the frame 1 along its length direction for blanking the connecting through holes and length of the leaf spring, pre-bending the ears and forming the ears of the leaf spring respectively;

[0063] Two guide rails 2 are symmetrically arranged on the upper surface of the frame 1. The guide rails 2 extend along the length direction of the frame 1. A placing plate 5 is slidably mounted on the surface of the guide rails 2. A pushing driving assembly 3 is arranged on the upper surface of the frame 1 for driving the placing plate 5 to slide on the surface of the guide rails 2 to sequentially perform the blanking process of the connecting through holes and length, the pre-bending process of the ears and the ear forming process; A positioning hole 501 is arranged on the surface of the placing plate 5. A conical positioning column 15 is installed inside the positioning hole 501 through a supporting spring 14. A bearing vertical plate 12 is arranged on the upper surface of the placing plate 5. A pushing hydraulic cylinder 4 is installed outside the bearing vertical plate 12. The working end of the pushing hydraulic cylinder 4 penetrates through the bearing vertical plate 12 along the length direction of the frame 1 and is connected with a pushing plate 13 for pushing the leaf spring from the placing plate 5 into the arc pressing and forming mechanism 11.

[0064] As an alternative embodiment, the pushing drive assembly 3 includes a mounting plate 301, which is mounted on the outer side of the frame 1. A pushing motor 302 is mounted on the outer side of the mounting plate 301. The output end of the pushing motor 302 penetrates through the mounting plate 301 and is connected to a pushing lead screw 304. The pushing lead screw 304 is parallel to the guide rail 2 and is located between the two guide rails 2. A pushing slider 303 is mounted on the outer side of the pushing lead screw 304 by means of a thread. The pushing slider 303 is connected to the placement plate 5. With such a setting, the pushing motor 302 drives the pushing lead screw 304 to rotate. By means of screw drive, the pushing slider 303 moves on the outer side of the pushing lead screw 304, so as to drive the placement plate 5 to slide on the surface of the guide rail 2 through the pushing slider 303.

[0065] On the upper surface of the frame 1, a blanking sliding groove 101, a pre-bending sliding groove 102 and a forming sliding groove 103 are sequentially arranged along its length direction. The blanking sliding groove 101, the pre-bending sliding groove 102 and the forming sliding groove 103 all extend along the width direction of the frame 1 and respectively correspond to the blanking mechanism 6, the pre-bending mechanism 7 and the ear-forming mechanism 8.

[0066] The blanking mechanism 6 includes a blanking top plate 602 and a blanking bottom slider 606. There are two blanking bottom sliders 606 in total, which are symmetrically and slidably mounted inside the blanking sliding groove 101. The upper surface of the blanking bottom slider 606 is flush with the surface of the frame 1 and is connected to a blanking bearing seat 607. The surface of the blanking bearing seat 607 is flush with the surface of the placement plate 5. A knife groove 6071 is arranged on the upper surface of the blanking bearing seat 607. A second blanking drive assembly 605 is arranged on the bottom surface of the frame 1 for driving the two blanking bottom sliders 606 to slide towards or away from each other inside the blanking sliding groove 101.

[0067] The blanking top plate 602 is mounted on the surface of the frame 1 through a column and is located above the blanking sliding groove 101. A blanking hydraulic cylinder 601 is mounted on the upper surface of the blanking top plate 602. The output end of the blanking hydraulic cylinder 601 vertically penetrates through the blanking top plate 602 and is connected to a blanking lifting plate 604. A punching column 610 is arranged on the bottom surface of the blanking lifting plate 604. The punching column 610 corresponds to the positioning hole 501 and is used for punching the connecting through hole of the leaf spring. A blanking adjustment groove 6041 corresponding to the blanking sliding groove 101 is arranged through the surface of the blanking lifting plate 604. Two blanking upper sliders 609 are symmetrically and slidably mounted inside the blanking adjustment groove 6041. A first blanking drive assembly 603 is arranged on the upper surface of the blanking lifting plate 604 for driving the two blanking upper sliders 609 to slide towards or away from each other inside the blanking adjustment groove 6041. The bottom surface of the blanking upper slider 609 penetrates out of the blanking adjustment groove 6041 and is connected to a cutting knife 608. The cutting knife 608 corresponds to the knife groove 6071.

[0068] With such a setting, the first blanking drive assembly 603 drives the two upper blanking sliders 609 to slide towards or away from each other inside the blanking adjustment groove 6041, so as to adjust the distance between the two cutting knives 608. At the same time, the second blanking drive assembly 605 drives the two lower blanking sliders 606 to slide towards or away from each other inside the blanking sliding groove 101, so as to adjust the distance between the two blanking bearing seats 607, thus meeting the production requirements of leaf springs with different length dimensions and having a wide application range. When the placement plate 5 drives the steel plate to move below the blanking top plate 602, both ends of the steel plate are located on the surface of the blanking bearing seats 607. The blanking hydraulic cylinder 601 drives the blanking lifting plate 604 to descend, and the two ends of the steel plate are cut through the cooperation of the cutting knives 608 and the knife grooves 6071. The connecting through holes of the leaf spring are punched in the center of the steel plate by the punching columns 610.

[0069] The pre-bending mechanism 7 includes a bending bottom slider 706 and a bending top plate 702. There are two bending bottom sliders 706 in total, which are symmetrically slidably installed inside the pre-bending sliding groove 102. A second bending drive assembly 705 for driving the two bending bottom sliders 706 to slide towards or away from each other inside the pre-bending sliding groove 102 is arranged on the bottom surface of the frame 1. A bending support hydraulic cylinder 707 is installed on the upper surface of the bending bottom slider 706. The output end of the bending support hydraulic cylinder 707 is vertically upward and connected with a bending support roller 708, and the bending support roller 708 extends along the length direction of the frame 1.

[0070] The bending top plate 702 is installed on the upper surface of the frame 1 through columns and is located above the pre-bending sliding groove 102. A bending hydraulic cylinder 701 is installed on the upper surface of the bending top plate 702. The output end of the bending hydraulic cylinder 701 vertically penetrates the bending top plate 702 and is connected with a bending lifting plate 704. A bending adjustment groove 7041 corresponding to the pre-bending sliding groove 102 is penetrated on the surface of the bending lifting plate 704. Two bending upper sliders 710 are symmetrically slidably installed inside the bending adjustment groove 7041. A first bending drive assembly 703 for driving the two bending upper sliders 710 to slide towards or away from each other inside the bending adjustment groove 7041 is arranged on the upper surface of the bending lifting plate 704. The bottom end of the bending upper slider 710 is connected with a bending pressing roller 709, and the bending pressing roller 709 is parallel to the bending support roller 708 and is used to cooperate to bend the end of the steel plate.

[0071] With such a setting, the first bending drive assembly 703 drives the two upper bending sliders 710 to slide towards or away from each other inside the bending adjustment groove 7041, so as to adjust the distance between the two upper bending sliders 710. At the same time, the second bending drive assembly 705 drives the two bottom bending sliders 706 to slide towards or away from each other inside the pre-bending sliding groove 102, so as to adjust the distance between the two bottom bending sliders 706, which can meet the production requirements of leaf springs of different lengths and has a wide application range. When the placement plate 5 drives the steel plate to move below the bending top plate 702, the bending support roller 708 is located below the steel plate, and the bending pressing roller 709 is located above the steel plate. The bending hydraulic cylinder 701 drives the bending lifting plate 704 to descend, the bending pressing roller 709 presses the steel plate, and the bending support hydraulic cylinder 707 drives the bending support roller 708 to rise, cooperating with the bending pressing roller 709 to pre-bend both ends of the steel plate.

[0072] The ear-forming mechanism 8 includes an ear top plate 802 and ear sliders 808. The ear top plate 802 is installed on the upper surface of the frame 1 through columns and is located above the forming sliding groove 103. An ear hydraulic cylinder 801 is installed on the upper surface of the ear top plate 802. The output end of the ear hydraulic cylinder 801 vertically penetrates the ear top plate 802 downward and is connected with an ear pressing plate 803.

[0073] There are two ear sliders 808 in total, which are symmetrically slidably installed inside the forming sliding groove 103. A ear drive assembly 805 for driving the two ear sliders 808 to slide towards or away from each other inside the forming sliding groove 103 is arranged on the bottom surface of the frame 1. The upper surface of the ear slider 808 is flush with the upper surface of the frame 1 and is connected with an ear sliding table 809. A forming die 804 and a fixed frame 806 are installed on the upper surface of the ear sliding table 809. Insertion cavities 8041 are arranged on the facing surfaces of the two forming dies 804. The inner bottom surface of the insertion cavity 8041 is flush with the upper surface of the placement plate 5. A semicircular forming cavity 8042 is communicated with the inner wall of the insertion cavity 8041.

[0074] An ear through hole 8061 is penetrated through the side of the fixed frame 806 close to the forming die 804. The ear through hole 8061 is coaxial with the forming cavity 8042. An ear positioning hydraulic cylinder 807 is installed on the outer side of the fixed frame 806 away from the forming die 804. The output end of the ear positioning hydraulic cylinder 807 extends into the fixed frame 806 and is connected with an ear positioning shaft 810. The ear positioning shaft 810 is coaxial with the ear through hole 8061.

[0075] With such a setting, when the placement plate 5 drives the steel plate to move below the ear top plate 802, the steel plate is located between the two forming dies 804. The ear hydraulic cylinder 801 drives the ear pressing plate 803 to descend, and the steel plate is pressed and fixed on the surface of the placement plate 5 through the ear pressing plate 803. The ear driving assembly 805 drives the two ear sliders 808 to slide towards each other inside the forming sliding groove 103 until the pre-bent parts at both ends of the steel plate completely enter the forming cavity 8042 through the insertion cavity 8041. The ear driving assembly 805 stops working. The ear positioning hydraulic cylinder 807 drives the ear positioning shaft 810 to move, so that the ear positioning shaft 810 is inserted into the forming cavity 8042. A guiding cavity for guiding both ends of the steel plate is formed between the ear positioning shaft 810 and the forming cavity 8042. The ear driving assembly 805 continues to drive the two ear sliders 808 to slide towards each other, and the two forming dies 804 extrude both ends of the steel plate, and cooperate with the forming cavity 8042 and the ear positioning shaft 810 for guiding to realize the synchronous forming of the ears at both ends of the steel plate.

[0076] Guide shafts 8043 are evenly embedded in the inner wall of the forming cavity 8042. With such a setting, the sliding friction between the steel plate and the forming cavity 8042 is changed into rolling friction through the guide shafts 8043, which is convenient for the steel plate to move inside the forming cavity 8042 and is convenient for realizing the forming of the ears.

[0077] An ear limiting plate 811 is arranged on the side of the forming die 804 away from the fixed frame 806. An ear limiting hole 8111 is arranged inside the ear limiting plate 811. The ear limiting hole 8111 is coaxial with the ear positioning shaft 810 and has a clearance fit. With such a setting, the ear limiting plate 811 supports the ear positioning shaft 810 to ensure the stability of the ear positioning shaft 810 and ensure the forming quality of the ears.

[0078] The structures of the first blanking driving assembly 603 and the first bending driving assembly 703 are the same. The first blanking driving assembly 603 includes a protective box 6033, which is installed on the upper surface of the blanking lifting plate 604 and is connected to the output end of the blanking hydraulic cylinder 601. A first double-shaft motor 6034 is installed inside the protective box 6033. The two output ends of the first double-shaft motor 6034 are respectively connected with a first upper driving lead screw 6032 and a second upper driving lead screw 6035. The thread directions of the first upper driving lead screw 6032 and the second upper driving lead screw 6035 are opposite. The first upper moving seat 6031 and the second upper moving seat 6036 are respectively installed on the outer sides of the first upper driving lead screw 6032 and the second upper driving lead screw 6035 through threads. The first upper moving seat 6031 and the second upper moving seat 6036 are respectively connected with the two blanking upper sliders 609.

[0079] With such a setting, the first dual-axis motor 6034 drives the first upper driving lead screw 6032 and the second upper driving lead screw 6035 to rotate. Since the thread directions of the first upper driving lead screw 6032 and the second upper driving lead screw 6035 are opposite, the first upper moving seat 6031 and the second upper moving seat 6036 can be driven to move towards or away from each other by using screw drive, so as to drive the two blanking upper sliders 609 to slide towards or away from each other inside the blanking adjustment groove 6041.

[0080] On the upper surface of the blanking lifting plate 604, there are two fixed plates 6037 installed, which are respectively in contact with the first upper moving seat 6031 and the second upper moving seat 6036. On the side of the fixed plate 6037 close to the blanking adjustment groove 6041, a clamping hydraulic cylinder 6038 is installed. The output end of the clamping hydraulic cylinder 6038 extends horizontally and is connected with a transmission plate 6039. The bottom end of the transmission plate 6039 extends vertically and is connected with a positioning clamping plate 6040. The positioning clamping plate 6040 and the transmission plate 6039 are in an inverted "T" shape structure, which is used to cooperate with the fixed plate 6037 to clamp and position the first upper moving seat 6031 and the second upper moving seat 6036.

[0081] With such a setting, when the position adjustment of the first upper moving seat 6031 and the second upper moving seat 6036 is completed, the clamping hydraulic cylinder 6038 contracts, drives the positioning clamping plate 6040 to move towards the fixed plate 6037 through the transmission plate 6039, and clamps and fixes the first upper moving seat 6031 and the second upper moving seat 6036 through the positioning clamping plate 6040 and the fixed plate 6037, so as to ensure the stability of the first upper moving seat 6031 and the second upper moving seat 6036, which helps to ensure the blanking effect.

[0082] The second blanking drive assembly 605, the second bending drive assembly 705 and the ear-rolling drive assembly 805 have the same structure. The second blanking drive assembly 605 includes a second dual-axis motor 6051. The second dual-axis motor 6051 is installed on the bottom surface of the frame 1. The two output ends of the second dual-axis motor 6051 are respectively connected with a first bottom driving lead screw 6052 and a second bottom driving lead screw 6054. The thread directions of the first bottom driving lead screw 6052 and the second bottom driving lead screw 6054 are opposite. The first bottom moving seat 6053 and the second bottom moving seat 6055 are respectively installed on the outer sides of the first bottom driving lead screw 6052 and the second bottom driving lead screw 6054 through threads. The first bottom moving seat 6053 and the second bottom moving seat 6055 are respectively connected with the two blanking bottom sliders 606.

[0083] With such a setting, the second double-shaft motor 6051 drives the first bottom drive lead screw 6052 and the second bottom drive lead screw 6054 to rotate synchronously. Since the thread directions of the first bottom drive lead screw 6052 and the second bottom drive lead screw 6054 are opposite, the first bottom moving seat 6053 and the second bottom moving seat 6055 move towards or away from each other, thereby driving the two blanking bottom sliders 606 to slide towards or away from each other inside the blanking sliding groove 101.

[0084] The annular conveying mechanism 9 includes a conveying frame 901. On the upper surface of the conveying frame 901, two layers of conveying bearing plates 902 are installed. On the upper surfaces of the two conveying bearing plates 902, two conveying sprockets 903 are symmetrically and rotatably installed. A conveying drive shaft 906 is connected between the two conveying sprockets 903 distributed vertically. On the upper surface of the upper conveying bearing plate 902, a conveying motor 905 is installed. The output end of the conveying motor 905 is connected to any one of the conveying drive shafts 906; a conveying chain 904 is drivingly connected between the two conveying sprockets 903 distributed horizontally. The surface of the conveying chain 904 is evenly connected with conveying connecting plates 907 for installing the lifting mechanism 10. With such a setting, when the device works, the conveying motor 905 drives the conveying sprockets 903 to rotate through the conveying drive shaft 906, so that the conveying chain 904 drives the conveying connecting plates 907 to move, realizing the annular movement of the lifting mechanism 10;

[0085] Support pulleys 908 are evenly installed on the bottom surface of the conveying chain 904. With such a setting, the conveying chain 904 is supported by the support pulleys 908 to ensure the smooth movement of the conveying chain 904;

[0086] The lifting mechanism 10 includes a lifting bearing plate 1003. The back surface of the lifting bearing plate 1003 is connected to the conveying connecting plate 907. On the surface of the lifting bearing plate 1003, a lifting fixing frame 1002 is installed. On the upper surface of the lifting fixing frame 1002, a lifting motor 1001 is installed. Inside the lifting fixing frame 1002, a vertical lifting lead screw 1006 and a lifting guide post 1004 are installed. The lifting lead screw 1006 is connected to the output end of the lifting motor 1001. A lifting connecting plate 1005 is installed on the outer side of the lifting lead screw 1006 through threads for installing the arc pressing and forming mechanism 11. With such a setting, the lifting motor 1001 drives the lifting lead screw 1006 to rotate, the lifting connecting plate 1005 is limited and guided by the lifting guide post 1004, and the lifting connecting plate 1005 drives the arc pressing and forming mechanism 11 to lift by screw drive.

[0087] The arc pressing and forming mechanism 11 includes an arc pressing gantry 1102. The arc pressing gantry 1102 is connected to the lifting end of the lifting mechanism 10. The bottom surface of the gantry is connected with an arc pressing bearing frame 1103. An arc pressing motor 1101 is installed on the upper surface of the gantry. An arc pressing lead screw 1107 is rotatably installed inside the gantry. The arc pressing lead screw 1107 is connected to the conveying end of the arc pressing motor 1101. An arc pressing lifting rod 1108 is installed on the outer side of the arc pressing lead screw 1107 through a thread. The bottom surface of the arc pressing lifting rod 1108 is connected with an arc pressing guide post 1106. The bottom end of the arc pressing guide post 1106 extends into the arc pressing bearing frame 1103 and is connected with an arc pressing lifting plate 1109. The bottom surface of the arc pressing lifting plate 1109 is evenly connected with lifting fork-shaped frames 1111. Upper arc pressing rollers 1105 are installed on the surfaces of all the lifting fork-shaped frames 1111. All the upper arc pressing rollers 1105 are distributed in an arc shape. The inner bottom surface of the arc pressing bearing frame 1103 is evenly connected with fixed fork-shaped frames 1110. The fixed fork-shaped frames 1110 and the lifting fork-shaped frames 1111 are distributed alternately. Bottom arc pressing rollers 1104 are installed on the surfaces of all the fixed fork-shaped frames 1110. All the bottom arc pressing rollers 1104 are distributed in an arc shape and are used to cooperate with the upper arc pressing rollers 1105 to perform integral arc pressing and forming of the leaf spring.

[0088] With such a setting, when the pushing plate 13 pushes the steel plate that has completed the ear forming to the surface of the bottom arc pressing roller 1104, the arc pressing motor 1101 drives the arc pressing lead screw 1107 to rotate, so that the arc pressing lifting rod 1108 drives the arc pressing lifting plate 1109 to lift and lower inside the arc pressing bearing frame 1103 through the arc pressing guide post 1106. The upper arc pressing rollers 1105 descend along with the arc pressing lifting plate 1109, and the red-hot steel plate is arc-pressed and formed by the cooperation of the upper arc pressing rollers 1105 and the bottom arc pressing rollers 1104.

[0089] Both the inner ends of the upper arc pressing rollers 1105 and the bottom arc pressing rollers 1104 are connected with fixing bolts 1112. The inner ends of the fixing bolts 1112 pass through the middle slots of the lifting fork-shaped frames 1111 or the fixed fork-shaped frames 1110 and are installed with fixing nuts 1113 through threads, which are used to cooperate with the fixing bolts 1112 to realize the height adjustment and locking fixation of the upper arc pressing rollers 1105 and the bottom arc pressing rollers 1104. Such a setting can realize the height adjustment and fixation of the upper arc pressing rollers 1105 and the bottom arc pressing rollers 1104, can meet the use requirements of leaf springs with different arcs, and has a wide application range.

[0090] The using method of the leaf spring forming equipment includes the following steps:

[0091] a. Place an annular oil cooling tank outside the annular conveying mechanism 9, make the oil cooling tank located directly below the arc pressing and forming mechanism 11, and add cooling oil into the oil cooling tank.

[0092] b. Place the red-hot steel plate on the surface of the placement plate 5, making the steel plate contact the pusher plate 13. Use the gravity of the steel plate to press down the positioning post 15, overcoming the elastic force of the supporting spring 14, so that the positioning post 15 completely enters the positioning hole 501;

[0093] c. Drive the placement plate 5 to slide on the surface of the guide rail 2 through the pushing drive assembly 3, send the steel plate into the blanking mechanism 6, and cut both ends of the steel plate through the blanking mechanism 6 and punch a connecting through-hole in the center of the steel plate;

[0094] The connecting through-hole is coaxial with the positioning hole 501. After blanking, use the elastic force of the supporting spring 14 to push up the positioning post 15, so that the positioning post 15 is inserted into the connecting through-hole and the blanking waste is ejected. Position the steel plate through the cooperation of the positioning post 15 and the connecting through-hole to ensure the stability of the steel plate;

[0095] d. Drive the placement plate 5 to slide on the surface of the guide rail 2 through the pushing drive assembly 3, send the blanked steel plate into the pre-bending mechanism 7, and pre-bend both ends of the blanked steel plate through the pre-bending mechanism 7;

[0096] e. Drive the placement plate 5 to slide on the surface of the guide rail 2 through the pushing drive assembly 3, send the pre-bent steel plate into the ear-forming mechanism 8, and synchronously form ears at both ends of the steel plate through the ear-forming mechanism 8;

[0097] f. Drive the lifting mechanism 10 to move through the annular conveying mechanism 9, drive the arc-forming mechanism 11 to lift through the lifting mechanism 10, so that the arc-forming mechanism 11 corresponds to the placement plate 5 with the steel plate with ears formed;

[0098] The pusher hydraulic cylinder 4 pushes the steel plate through the pusher plate 13. The positioning post 15 has a conical structure. The steel plate exerts a downward component force on the positioning post 15, overcoming the elastic force of the supporting spring 14, so that the positioning post 15 completely enters the positioning hole 501, thereby pushing the steel plate with ears formed from the placement plate 5 into the arc-forming mechanism 11;

[0099] g. Drive the placement plate 5 to slide reversely on the surface of the guide rail 2 through the pushing drive assembly 3, so that the placement plate 5 returns to its original position;

[0100] Form an arc on the steel plate through the arc-forming mechanism 11. After the arc-forming is completed, drive the arc-forming mechanism 11 to descend through the lifting mechanism 10, so that the steel plate spring is completely immersed in the cooling oil in the oil cooling tank to cool the steel plate spring by oil cooling.

[0101] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claimed rights.

Claims

1. A leaf spring forming device, characterized in that: It includes a frame (1) and an annular conveying mechanism (9). The frame (1) and the annular conveying mechanism (9) are linearly distributed. A plurality of lifting mechanisms (10) are evenly arranged at the conveying end of the annular conveying mechanism (9). The lifting end of the lifting mechanism (10) is connected with an arc pressing and forming mechanism (11) for performing the arc pressing and forming process of the leaf spring. On the upper surface of the frame (1), a blanking mechanism (6), a pre-bending mechanism (7), and an ear forming mechanism (8) are sequentially arranged along the length direction thereof, respectively performing the blanking of the connecting through holes and the length of the leaf spring, the pre-bending of the ears, and the ear forming. Two guide rails (2) are symmetrically arranged on the upper surface of the frame (1). The guide rails (2) extend along the length direction of the frame (1). A placing plate (5) is slidably mounted on the surface of the guide rails (2). A pushing drive assembly (3) is arranged on the upper surface of the frame (1) for driving the placing plate (5) to slide on the surface of the guide rails (2) to sequentially perform the blanking process of the connecting through holes and the length, the pre-bending process of the ears, and the ear forming process. A positioning hole (501) is arranged on the surface of the placing plate (5). A conical positioning post (15) is installed inside the positioning hole (501) through a supporting spring (14). A bearing vertical plate (12) is arranged on the upper surface of the placing plate (5). A material pushing hydraulic cylinder (4) is installed outside the bearing vertical plate (12). The working end of the material pushing hydraulic cylinder (4) penetrates through the bearing vertical plate (12) along the length direction of the frame (1) and is connected with a material pushing plate (13) for pushing the leaf spring from the placing plate (5) into the arc pressing and forming mechanism (11). Among them, a blanking sliding groove (101), a pre-bending sliding groove (102), and a forming sliding groove (103) are sequentially arranged on the upper surface of the frame (1) along the length direction thereof. The blanking sliding groove (101), the pre-bending sliding groove (102), and the forming sliding groove (103) all extend along the width direction of the frame (1) and correspond to the blanking mechanism (6), the pre-bending mechanism (7), and the ear forming mechanism (8) respectively. The blanking mechanism (6) includes a blanking top plate (602) and a blanking bottom slider (606). There are two blanking bottom sliders (606) which are symmetrically and slidably mounted inside the blanking sliding groove (101). The upper surface of the blanking bottom slider (606) is flush with the surface of the frame (1) and is connected with a blanking bearing seat (607). The surface of the blanking bearing seat (607) is flush with the surface of the placing plate (5). A tool groove (6071) is arranged on the upper surface of the blanking bearing seat (607). A second blanking drive assembly (605) is arranged on the bottom surface of the frame (1) for driving the two blanking bottom sliders (606) to slide towards or away from each other inside the blanking sliding groove (101). The blanking top plate (602) is installed on the surface of the frame (1) through columns and is located above the blanking sliding groove (101). A blanking hydraulic cylinder (601) is installed on the upper surface of the blanking top plate (602). The output end of the blanking hydraulic cylinder (601) vertically penetrates the blanking top plate (602) downward and is connected with a blanking lifting plate (604). A punching column (610) is arranged on the bottom surface of the blanking lifting plate (604). The punching column (610) corresponds to the positioning hole (501) and is used for blanking the through holes for connecting the leaf springs. A blanking adjustment groove (6041) corresponding to the blanking sliding groove (101) is penetrated on the surface of the blanking lifting plate (604). Two blanking upper sliders (609) are symmetrically and slidably installed inside the blanking adjustment groove (6041). A first blanking driving component (603) for driving the two blanking upper sliders (609) to slide towards or away from each other inside the blanking adjustment groove (6041) is arranged on the upper surface of the blanking lifting plate (604). The bottom surface of the blanking upper slider (609) penetrates out of the blanking adjustment groove (6041) and is connected with a cutting tool (608). The cutting tool (608) corresponds to the tool groove (6071). Among them, the annular conveying mechanism (9) includes a conveying frame (901). Two layers of conveying bearing plates (902) are installed on the upper surface of the conveying frame (901). Two conveying sprockets (903) are symmetrically and rotatably installed on the upper surfaces of the two conveying bearing plates (902). A conveying driving shaft (906) is connected between the two conveying sprockets (903) distributed vertically. A conveying motor (905) is installed on the upper surface of the upper conveying bearing plate (902). The output end of the conveying motor (905) is connected with any one of the conveying driving shafts (906). A conveying chain (904) is drivingly connected between the two conveying sprockets (903) distributed horizontally. Conveying connecting plates (907) are uniformly connected to the surface of the conveying chain (904) and are used for installing the lifting mechanism (10). Supporting pulleys (908) are uniformly installed on the bottom surface of the conveying chain (904). The lifting mechanism (10) includes a lifting bearing plate (1003). The back surface of the lifting bearing plate (1003) is connected with the conveying connecting plate (907). A lifting fixing frame (1002) is installed on the surface of the lifting bearing plate (1003). A lifting motor (1001) is installed on the upper surface of the lifting fixing frame (1002). A vertical lifting lead screw (1006) and a lifting guide post (1004) are installed inside the lifting fixing frame (1002). The lifting lead screw (1006) is connected with the output end of the lifting motor (1001). A lifting connecting plate (1005) for installing the arc pressing and forming mechanism (11) is installed on the outer side of the lifting lead screw (1006) through threads.

2. The leaf spring forming device according to claim 1, characterized in that: The pushing drive assembly (3) includes a mounting plate (301). The mounting plate (301) is mounted on the outer side of the frame (1). A pushing motor (302) is mounted on the outer side of the mounting plate (301). The output end of the pushing motor (302) penetrates through the mounting plate (301) and is connected to a pushing lead screw (304). The pushing lead screw (304) is parallel to the guide rail (2) and is located between the two guide rails (2). A pushing slider (303) is mounted on the outer side of the pushing lead screw (304) by means of a thread. The pushing slider (303) is connected to the placing plate (5).

3. The leaf spring forming device according to claim 1, characterized in that: The pre-bending mechanism (7) includes a bending bottom slider (706) and a bending top plate (702). There are two bending bottom sliders (706) in total, which are symmetrically and slidably mounted inside the pre-bending sliding groove (102). A second bending drive assembly (705) for driving the two bending bottom sliders (706) to slide towards or away from each other inside the pre-bending sliding groove (102) is provided on the bottom surface of the frame (1). A bending support hydraulic cylinder (707) is mounted on the upper surface of the bending bottom slider (706). The output end of the bending support hydraulic cylinder (707) is vertically upward and is connected to a bending support roller (708). The bending support roller (708) extends along the length direction of the frame (1); The bending top plate (702) is mounted on the upper surface of the frame (1) through columns and is located above the pre-bending sliding groove (102). A bending hydraulic cylinder (701) is mounted on the upper surface of the bending top plate (702). The output end of the bending hydraulic cylinder (701) vertically penetrates through the bending top plate (702) and is connected to a bending lifting plate (704). A bending adjustment groove (7041) corresponding to the pre-bending sliding groove (102) is provided through the surface of the bending lifting plate (704). Two bending upper sliders (710) are symmetrically and slidably mounted inside the bending adjustment groove (7041). A first bending drive assembly (703) for driving the two bending upper sliders (710) to slide towards or away from each other inside the bending adjustment groove (7041) is provided on the upper surface of the bending lifting plate (704). The bottom end of the bending upper slider (710) is connected to a bending pressing roller (709). The bending pressing roller (709) is parallel to the bending support roller (708) and is used to cooperate with the bending support roller (708) to bend the end of the steel plate.

4. The leaf spring forming device according to claim 3, wherein: The ear-rolling forming mechanism (8) includes an ear-rolling top plate (802) and an ear-rolling slider (808). The ear-rolling top plate (802) is mounted on the upper surface of the frame (1) through columns and is located above the forming sliding groove (103). An ear-rolling hydraulic cylinder (801) is mounted on the upper surface of the ear-rolling top plate (802). The output end of the ear-rolling hydraulic cylinder (801) vertically penetrates through the ear-rolling top plate (802) and is connected to an ear-rolling pressing plate (803); There are two ear-shaped sliders (808) which are symmetrically and slidably installed inside the forming sliding groove (103). A bottom surface of the frame (1) is provided with an ear-shaped driving assembly (805) for driving the two ear-shaped sliders (808) to slide towards or away from each other inside the forming sliding groove (103). An upper surface of the ear-shaped slider (808) is flush with an upper surface of the frame (1) and is connected with an ear-shaped sliding table (809). An upper surface of the ear-shaped sliding table (809) is installed with a forming die (804) and a fixing frame (806). Opposite surfaces of the two forming dies (804) are provided with insertion cavities (8041). An inner bottom surface of the insertion cavity (8041) is flush with an upper surface of the placing plate (5). An inner wall of the insertion cavity (8041) is communicated with a semi-circular forming cavity (8042). A side surface of the fixing frame (806) close to the forming die (804) is penetrated with an ear-shaped through hole (8061). The ear-shaped through hole (8061) is coaxial with the forming cavity (8042). An outer side of the fixing frame (806) away from the forming die (804) is installed with an ear-shaped positioning hydraulic cylinder (807). An output end of the ear-shaped positioning hydraulic cylinder (807) extends into the fixing frame (806) and is connected with an ear-shaped positioning shaft (810). The ear-shaped positioning shaft (810) is coaxial with the ear-shaped through hole (8061). Guide shafts (8043) are evenly embedded in an inner wall of the forming cavity (8042). A side surface of the forming die (804) away from the fixing frame (806) is provided with an ear-shaped limiting plate (811). An ear-shaped limiting hole (8111) is arranged inside the ear-shaped limiting plate (811). The ear-shaped limiting hole (8111) is coaxial with the ear-shaped positioning shaft (810) and has a clearance fit therewith.

5. The leaf spring forming device according to claim 4, characterized in that: Structures of the first blanking driving assembly (603) and the first bending driving assembly (703) are the same. The first blanking driving assembly (603) includes a protective box (6033). The protective box (6033) is installed on an upper surface of the blanking lifting plate (604) and is connected with an output end of the blanking hydraulic cylinder (601). A first double-shaft motor (6034) is installed inside the protective box (6033). Two output ends of the first double-shaft motor (6034) are respectively connected with a first upper driving lead screw (6032) and a second upper driving lead screw (6035). Thread rotation directions of the first upper driving lead screw (6032) and the second upper driving lead screw (6035) are opposite. Outer sides of the first upper driving lead screw (6032) and the second upper driving lead screw (6035) are respectively installed with a first upper moving seat (6031) and a second upper moving seat (6036) through threads. The first upper moving seat (6031) and the second upper moving seat (6036) are respectively connected with the two blanking upper sliders (609). The upper surface of the blanking lifting plate (604) is provided with a fixed plate (6037). There are two fixed plates (6037) which are respectively in contact with the first upper moving seat (6031) and the second upper moving seat (6036). A clamping hydraulic cylinder (6038) is installed on the side of the fixed plate (6037) close to the blanking adjustment groove (6041). The output end of the clamping hydraulic cylinder (6038) extends horizontally and is connected to a transmission plate (6039). The bottom end of the transmission plate (6039) extends vertically and is connected to a positioning clamping plate (6040). The positioning clamping plate (6040) and the transmission plate (6039) are in an inverted "T" shape structure, and are used to cooperate with the fixed plate (6037) to clamp and position the first upper moving seat (6031) and the second upper moving seat (6036).

6. The leaf spring forming device according to claim 5, wherein: The second blanking drive assembly (605), the second bending drive assembly (705) and the ear curling drive assembly (805) have the same structure. The second blanking drive assembly (605) includes a second double-shaft motor (6051). The second double-shaft motor (6051) is installed on the bottom surface of the frame (1). The two output ends of the second double-shaft motor (6051) are respectively connected to a first bottom drive lead screw (6052) and a second bottom drive lead screw (6054). The thread directions of the first bottom drive lead screw (6052) and the second bottom drive lead screw (6054) are opposite. A first bottom moving seat (6053) and a second bottom moving seat (6055) are respectively installed on the outer sides of the first bottom drive lead screw (6052) and the second bottom drive lead screw (6054) through threads. The first bottom moving seat (6053) and the second bottom moving seat (6055) are respectively connected to two blanking bottom sliders (606).

7. The forming device for a leaf spring according to claim 1, wherein: The arc pressing and forming mechanism (11) includes an arc pressing gantry (1102), which is connected to the lifting end of the lifting mechanism (10). The bottom surface of the gantry is connected with an arc pressing bearing frame (1103). An arc pressing motor (1101) is installed on the upper surface of the gantry. An arc pressing lead screw (1107) is rotatably installed inside the gantry. The arc pressing lead screw (1107) is connected to the conveying end of the arc pressing motor (1101). An arc pressing lifting rod (1108) is installed on the outer side of the arc pressing lead screw (1107) through threads. The bottom surface of the arc pressing lifting rod (1108) is connected with an arc pressing guide post (1106). The bottom end of the arc pressing guide post (1106) extends into the arc pressing bearing frame (1103) and is connected with an arc pressing lifting plate (1109). The bottom surface of the arc pressing lifting plate (1109) is evenly connected with lifting fork-shaped frames (1111). Upper arc pressing rollers (1105) are installed on the surfaces of all the lifting fork-shaped frames (1111). All the upper arc pressing rollers (1105) are distributed in an arc shape. The inner bottom surface of the arc pressing bearing frame (1103) is evenly connected with fixed fork-shaped frames (1110). The fixed fork-shaped frames (1110) and the lifting fork-shaped frames (1111) are staggered. Bottom arc pressing rollers (1104) are installed on the surfaces of all the fixed fork-shaped frames (1110). All the bottom arc pressing rollers (1104) are distributed in an arc shape and are used to cooperate with the upper arc pressing rollers (1105) to form the overall arc of the leaf spring. Fixed bolts (1112) are connected to the inner ends of the upper arc pressing rollers (1105) and the bottom arc pressing rollers (1104). The inner ends of the fixed bolts (1112) pass through the middle slots of the lifting fork-shaped frames (1111) or the fixed fork-shaped frames (1110) and are installed with fixed nuts (1113) through threads, which are used to cooperate with the fixed bolts (1112) to realize the height adjustment and locking fixation of the upper arc pressing rollers (1105) and the bottom arc pressing rollers (1104).

8. The method of using the leaf spring forming equipment according to claim 1, characterized in that: It includes the following steps: a. Place an annular oil cooling box outside the annular conveying mechanism (9) so that the oil cooling box is directly below the arc pressing and forming mechanism (11), and add cooling oil into the oil cooling box. b. Place the red-hot steel plate on the surface of the placement plate (5) so that the steel plate contacts the pushing plate (13). Use the gravity of the steel plate to press down the positioning column (15) and overcome the elastic force of the supporting spring (14) to make the positioning column (15) completely enter the positioning hole (501). c. Drive the placement plate (5) to slide on the surface of the guide rail (2) through the pushing drive assembly (3), send the steel plate into the blanking mechanism (6), and cut both ends of the steel plate and punch a connecting through hole in the center of the steel plate through the blanking mechanism (6). The connecting through-hole is coaxial with the positioning hole (501). After blanking, the elastic force of the supporting spring (14) is used to push up the positioning post (15) upward, so that the positioning post (15) is inserted into the connecting through-hole and the blanking waste is ejected. The steel plate is positioned by the cooperation of the positioning post (15) and the connecting through-hole to ensure the stability of the steel plate; d. The pushing and driving assembly (3) drives the placing plate (5) to slide on the surface of the guide rail (2), and sends the blanked steel plate into the pre-bending mechanism (7). The two ends of the blanked steel plate are pre-bent by the pre-bending mechanism (7); e. The pushing and driving assembly (3) drives the placing plate (5) to slide on the surface of the guide rail (2), and sends the pre-bent steel plate into the ear-rolling forming mechanism (8). The ear-rolling forming mechanism (8) performs synchronous ear-rolling forming on both ends of the steel plate; f. The annular conveying mechanism (9) drives the lifting mechanism (10) to move, and the lifting mechanism (10) drives the arc-pressing forming mechanism (11) to lift and lower, so that the arc-pressing forming mechanism (11) corresponds to the placing plate (5) on which the steel plate with completed ear-rolling is placed; The pushing hydraulic cylinder (4) pushes the steel plate through the pushing plate (13). The positioning post (15) has a conical structure. The steel plate exerts a downward component force on the positioning post (15), overcoming the elastic force of the supporting spring (14), so that the positioning post (15) completely enters the positioning hole (501), thereby pushing the steel plate with completed ear-rolling from the placing plate (5) into the arc-pressing forming mechanism (11); g. The pushing and driving assembly (3) drives the placing plate (5) to slide reversely on the surface of the guide rail (2) to make the placing plate (5) return to its original position; The arc-pressing forming mechanism (11) performs arc-pressing forming on the steel plate. After the arc-pressing forming is completed, the lifting mechanism (10) drives the arc-pressing forming mechanism (11) to descend, so that the steel plate spring is completely immersed in the cooling oil in the oil cooling tank to perform oil cooling on the steel plate spring.

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