A shaping and bending device for plate spring quenching

Abstract

This invention relates to the field of leaf spring processing technology, specifically a shaping and bending device for leaf spring quenching. It includes a U-shaped mounting bracket, a chain conveyor, and a bending assembly. The U-shaped mounting bracket is vertically positioned within the quenching tank, while the chain conveyor is horizontally positioned above the quenching tank. The bending process is controlled by a lifting assembly to allow the bent leaf spring to enter the quenching tank for quenching. During bending, the L-shaped pusher plate and position stop on the chain conveyor allow the leaf spring to be inserted into the bending assembly at the center, improving bending quality and efficiency. Furthermore, the T-shaped positioning plate and lower core mold of the bending assembly provide space for the leaf spring to repeatedly contact the quenching solution during the subsequent quenching process. Operation control is achieved by switching between a quenching lifting control cylinder and a bending control cylinder, offering convenience and ease of use. This improves quenching efficiency while avoiding the negative effects of indentations.

Description

Technical Field

[0001] This invention relates to the field of leaf spring processing technology, specifically to a shaping and bending device for leaf spring quenching. Background Technology

[0002] Leaf springs are the most widely used elastic load-bearing components in automotive and construction machinery suspension systems. During processing, leaf springs require quenching and bending operations. The sequence is as follows: first, the spring steel plate is fully heated, and then it is transported to the bending and quenching station via a chain conveyor belt. The operator places the steel plate in the bending device, and then the bending device places the bent steel plate in the quenching tank, completing the continuous operation of bending and quenching. Currently, the industry commonly uses the traditional process of directly bending steel leaf springs after quenching with a hard die. In order to improve the cooling efficiency during quenching, the hard die often adopts a slotted or ribbed hard die structure. However, the direct contact and pressure of the hard die in this process will form surface indentations at the bending part of the steel leaf spring, which will damage the surface integrity of the workpiece. Such indentations not only reduce the appearance quality and factory pass rate of the product, but also form stress concentration points, significantly reducing the fatigue life of the steel leaf spring, shortening the product service cycle, and affecting the operational safety and reliability of the whole vehicle and mechanical equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a shaping and bending device for quenching leaf springs, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a shaping and bending device for quenching leaf springs, comprising: The U-shaped mounting bracket and the chain conveyor are arranged close to each other. The U-shaped mounting bracket is vertically installed in the quenching tank, and the chain conveyor is horizontally installed at the upper end of the quenching tank. The U-shaped mounting bracket and the chain conveyor are installed in close proximity. The U-shaped mounting bracket is equipped with a movable support through a lifting assembly. The lifting assembly includes a quenching lifting control cylinder, an auxiliary guide rod, and two support guide rods. The bending assembly has a movable support on one side near the chain conveyor table. The bending assembly includes a lower bending die and an upper bending die. A lower core die is movably inserted into the lower bending die, and an upper core die is fixedly inserted into the upper bending die. The lower core die is connected to a quenching lifting control cylinder.

[0005] Preferably, the two support guide rods are vertically installed on one side of the U-shaped mounting bracket, and two support sleeves are provided on one side of the movable support. The support sleeves are movably sleeved on the upper side of the two support guide rods, and a support plate is horizontally provided at the lower end of the movable support. The support plate is movably sleeved on the two support guide rods.

[0006] Preferably, the auxiliary guide rod is vertically disposed on the side away from the supporting guide rod at the lower end of the U-shaped mounting bracket. The auxiliary guide rod is movably sleeved on the support plate of the movable support. When the movable support is located at the uppermost position inside the U-shaped mounting bracket, the upper end of the auxiliary guide rod is flush with the upper end of the support plate. A bottom support spring is vertically disposed at the lower end of the support plate inside the U-shaped mounting bracket.

[0007] Preferably, the movable support has two fixed arms horizontally arranged on the side away from the support guide rod. The lower bending die is horizontally fixed above the two fixed arms by bolts. The upper bending die is located directly above the lower bending die. A combined mold cavity is opened on opposite sides of both the lower bending die and the upper bending die. The lower core die is vertically and movably inserted into the combined mold cavity, and the upper ends of the lower core die and the lower bending die are aligned.

[0008] Preferably, the lower end of the lower core mold is provided with a U-shaped control rod, which is movably installed through the lower end of the bending lower mold. The lower end of the U-shaped control rod located outside the bending lower mold is provided with a horizontal lifting plate. The movable support is provided with a vertically staggered slot on one side of the lifting plate. The lifting plate is installed horizontally through the staggered slot. The quenching lifting control cylinder is vertically installed in the upper end of the U-shaped mounting bracket, and the lower end of the piston rod of the quenching lifting control cylinder is connected to the upper end of the lifting plate through the staggered slot.

[0009] Preferably, the upper end of the bending die is vertically provided with several clearance grooves, and the lower core die is provided with shaping blocks on one side of the clearance grooves. The shaping blocks are horizontally inserted into several clearance grooves, and the upper end of the shaping blocks is aligned with the upper end of the lower core die.

[0010] Preferably, an upper core mold is fixedly inserted into the combined mold cavity of the upper bending mold by bolts, the lower end of the upper core mold is flush with the lower end of the upper bending mold, and the shapes of the lower bending mold and the upper bending mold are correspondingly set on opposite sides.

[0011] Preferably, a bending control cylinder is vertically provided inside the movable support at the upper end of the bending die, the lower end of the bending control cylinder is connected to the upper end of the bending die, movable guide sleeves are vertically provided on both sides of the upper die, and movable guide rods are vertically provided at the positions of the movable support and the movable guide sleeves are movably connected to the movable guide rods.

[0012] Preferably, a combined positioning seat is vertically inserted into the center of the upper core mold. A spring groove is opened at the upper end of the combined positioning seat. A T-shaped positioning plate is provided in the lower end of the spring groove, and a telescopic spring is provided at the upper end of the T-shaped positioning plate located in the spring groove.

[0013] Preferably, the chain conveyor is provided with a horizontal extension bracket on the side away from the movable support. A feeding control cylinder is horizontally provided on the horizontal extension bracket. The feeding control cylinder is close to the movable support and passes through the horizontal extension bracket on one side, and is provided with an L-shaped pusher plate horizontally. The upper end of the chain conveyor is flush with the upper middle part of the bending die. A position stop bar is fixed on one side of the horizontal extension bracket by bolts.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In use, this device allows the bent leaf spring to enter the quenching tank for quenching by controlling the up and down movement of the movable support through the lifting assembly. During the bending operation, the L-shaped pusher plate and position stop bar of the chain conveyor table can center the leaf spring when it is inserted into the bending assembly, improving the quality and efficiency of bending. In addition, the T-shaped positioning plate and lower core mold of the bending assembly can provide the leaf spring with sufficient space to contact the quenching solution during the quenching operation after bending. The operation control is switched between the quenching lifting control cylinder and the bending control cylinder, which is convenient and worry-free. While improving quenching efficiency, it avoids the negative effects that indentation may cause. Attached Figure Description

[0015] Figure 1 This is a first-view schematic diagram of the structure of the present invention; Figure 2 This is a second-view schematic diagram of the structure of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of part A; Figure 4 This is a schematic diagram of the installation of the bending assembly of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of part B; Figure 6 This is a partial side-section structural diagram of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of part C; Figure 8 This is a schematic diagram of the rear connection structure of the movable support of the present invention; Figure 9 This is an exploded view of the connection of the bending assembly of the present invention.

[0016] In the diagram: 1. U-shaped mounting bracket; 2. Chain conveyor table; 3. Movable support; 4. Quenching lifting control cylinder; 5. Support guide rod; 6. Fixed support arm; 7. Lower bending die; 8. Combined die cavity; 9. Lower core die; 10. U-shaped control rod; 11. Lifting pull plate; 12. Misalignment slot; 13. Relief slide groove; 14. Shaping block; 15. Upper bending die; 16. Bending control cylinder; 17. Upper core die; 18. Movable guide rod; 19. Movable guide sleeve; 20. Combined positioning seat; 21. T-shaped positioning plate; 22. Telescopic spring; 23. Bottom support spring; 24. Auxiliary guide rod; 25. Horizontal extension bracket; 26. Feeding control cylinder; 27. L-shaped pusher plate; 28. Position stop bar. Detailed Implementation

[0017] 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.

[0018] Please see the appendix Figure 1-9 This application provides the following technical solutions.

[0019] A shaping and bending device for quenching leaf springs includes a U-shaped mounting bracket 1 and a chain conveyor 2. The U-shaped mounting bracket 1 is vertically installed in the quenching tank, and the chain conveyor 2 is horizontally installed at the upper end of the quenching tank. The U-shaped mounting bracket 1 and the chain conveyor 2 are arranged close to each other. A movable support 3 is provided inside the U-shaped mounting bracket 1 via a lifting assembly. The lifting assembly includes a quenching lifting control cylinder 4, an auxiliary guide rod 24, and two support guide rods 5. The two support guide rods 5 are respectively vertically installed on one side inside the U-shaped mounting bracket 1. Two support sleeves are provided on one side of the movable support 3, and the support sleeves are movably sleeved on the upper side of the two support guide rods 5. The lower end of the movable support 3 is horizontally positioned. A support plate is provided on the flat side, and two support guide rods 5 are movably connected to the support plate. An auxiliary guide rod 24 is vertically installed inside the U-shaped mounting bracket 1 on the side away from the support guide rods 5 at its lower end. The support plate of the movable support 3 is movably connected to the auxiliary guide rod 24. When the movable support 3 is located at the top of the U-shaped mounting bracket 1, the upper end of the auxiliary guide rod 24 is flush with the upper end of the support plate. A bottom support spring 23 is vertically installed at the lower end of the support plate inside the U-shaped mounting bracket 1. The movable support 3 can move vertically up and down inside the U-shaped mounting bracket 1 through the support guide rods 5 and the auxiliary guide rod 24. When the movable support 3 is at the top, the lower end of the bending die 7 is higher than the quenching liquid level.

[0020] A bending assembly is used to bend the leaf spring. The bending assembly is located on the side of the movable support 3 near the chain conveyor table 2. The bending assembly includes a lower bending die 7 and an upper bending die 15. A lower core die 9 is movably inserted into the lower bending die 7, and an upper core die 17 is fixedly inserted into the upper bending die 15. The lower core die 9 is connected to the quenching lifting control cylinder 4. Two fixed support arms 6 are horizontally provided on the side of the movable support 3 away from the support guide rod 5. The lower bending die 7 is horizontally fixed above the two fixed support arms 6 by bolts. The upper bending die 15 is located directly above the lower bending die 7. Both the lower bending die 7 and the upper bending die 15 have a combined mold cavity 8 on opposite sides. The lower core die 9 is vertically and movably inserted into the combined mold cavity 8, and the upper ends of the lower core die 9 and the lower bending die 7 are aligned. The size of the lower core die 9 is smaller than the volume of the combined mold cavity 8. The lower core die 9 can be retracted into the combined mold cavity 8 of the lower bending die 7. After the lower core die 9 is retracted into the combined mold cavity 8, the quenching solution can easily contact and quench the lower side of the leaf spring from the position of the combined mold cavity 8.

[0021] A U-shaped control rod 10 is provided at the lower end of the lower core mold 9. The U-shaped control rod 10 is movably installed through the lower end of the bending lower mold 7. A lifting plate 11 is horizontally provided at the lower end of the U-shaped control rod 10 outside the bending lower mold 7. A vertically opened misaligned slot 12 is provided on one side of the lifting plate 11. The lifting plate 11 is horizontally installed through the misaligned slot 12. The quenching lifting control cylinder 4 is vertically installed at the upper end of the U-shaped mounting bracket 1, and the lower end of the piston rod of the quenching lifting control cylinder 4 is connected to the upper end of the lifting plate 11 through the misaligned slot 12. Several clearance grooves 13 are vertically opened at the upper end of the bending lower mold 7. The lower core mold 9 is horizontally provided on one side of the clearance grooves 13. The shaping block 14 is horizontally inserted with several clearance grooves 13, and the upper end of the shaping block 14 is aligned with the upper end of the lower core mold 9. The length of the clearance groove 13 is equal to the maximum movable distance of the lower core mold 9. When the part of the U-shaped control rod 10 extending out of the bending lower mold 7 abuts against the lower end of the bending lower mold 7, the upper end of the lower core mold 9 is flush with the upper end of the bending lower mold 7. Similarly, the shaping block 14 is also flush with it. The entire upper end of the bending lower mold 7, together with the lower core mold 9 and the shaping block 14, is a whole. The upper core mold 17 and the bending upper mold 15 are a whole. During bending, no obvious groove will appear on the contact surface with the leaf spring, avoiding the indentation caused by bending.

[0022] An upper core mold 17 is bolted into the combined mold cavity 8 of the upper bending die 15. The lower end of the upper core mold 17 is flush with the lower end of the upper bending die 15. The lower bending die 7 and the upper bending die 15 are shaped correspondingly on opposite sides. A bending control cylinder 16 is vertically installed at the upper end of the upper bending die 15 inside the movable support 3. The lower end of the bending control cylinder 16 is connected to the upper end of the upper bending die 15. Movable guide sleeves 19 are vertically installed on both sides of the upper core mold 17. Movable guide rods 18 are vertically installed at the positions of the movable guide sleeves 19 on the movable support 3. The movable guide sleeves 19 are movably connected to the movable guide rods 18. The upper bending die 15 and the upper core mold 17 are bolted together to form a whole. When the bending control cylinder 16 controls the up and down movement of the upper bending die 15, it provides power for bending the leaf spring.

[0023] A combined positioning seat 20 is vertically inserted into the center of the upper core mold 17. A spring groove is provided at the upper end of the combined positioning seat 20. A T-shaped positioning plate 21 is provided in the lower end of the spring groove, which is vertically inserted through the combined positioning seat 20. The upper end of the T-shaped positioning plate 21 is located in the spring groove and has a telescopic spring 22. When the T-shaped positioning plate 21 is set, before the bending upper mold 15 contacts the bending lower mold 7, the T-shaped positioning plate 21 extends through the telescopic spring 22 and presses against the upper end of the leaf spring to be processed, thus pressing and pre-positioning the leaf spring. When the bending leaf spring is above the lower bending die 7, the bending control cylinder 16 pushes the upper bending die 15 down. At this time, the lower end of the T-shaped positioning plate 21 contacts the upper end of the leaf spring first to position the leaf spring. After bending is completed, the movable support 3 is pushed down. Since the movable support 3 is connected to the lifting plate 11 of the U-shaped control rod 10, when the movable support 3 is pushed down, under the weight of the movable support 3 and the upper component, the lower core die 9 and the lower bending die 7 still remain aligned. 3 will move vertically downwards along the support guide rod 5 and the auxiliary guide rod 24. When the support plate of the movable support 3 contacts the upper end of the bottom support spring 23, the movable support 3 will be pulled back. Then, the movable support 3 controls the lifting plate 11 to continue to descend along the misalignment slot 12. At this time, the U-shaped control rod 10 pulls the lower core mold 9 down, the shaping block 14 descends along the clearance slide 13, the bending control cylinder 16 controls the bending upper mold 15 to rise, and the T-shaped positioning plate 21, together with the telescopic spring 22, still supports the bent leaf spring. When the bending upper die 15 and bending lower die 7 are clamped, there is enough space for the quenching solution to pass through. The combined mold cavity 8 of the bending lower die 7, together with the shaping block 14, allows the leaf spring to still contact the quenching solution to the maximum extent when placed on the bending lower die 7. When the T-shaped positioning plate 21 is retracted into the spring groove to the maximum extent, the T-shaped positioning plate 21 is flush with the lower end of the upper core die 17. At this time, the elastic pressure provided by the telescopic spring 22 to the T-shaped positioning plate 21 is less than the deformation pressure of the heated leaf spring. After quenching, the quenched and bent leaf spring is pushed away from the lower bending die 7 and the upper bending die 15 by the control cylinder pushing device in the existing technology, and falls into the quenching pool for separate collection. Alternatively, the processed leaf spring can be extracted from the lower bending die 7 and the upper bending die 15 by manual or robotic arm methods. When the bent leaf spring is removed by robotic arm, the robotic arm can use conventional grippers to remove the bent leaf spring.

[0024] A horizontal extension bracket 25 is provided on the side of the chain conveyor table 2 away from the movable support 3. A feeding control cylinder 26 is horizontally provided on the horizontal extension bracket 25. The feeding control cylinder 26 is close to the movable support 3 and passes through the horizontal extension bracket 25 on one side, and has an L-shaped pusher plate 27 horizontally provided. The upper end of the chain conveyor table 2 is flush with the upper middle of the lower bending die 7. A position stop bar 28 is fixed on one side of the horizontal extension bracket 25 by bolts. The position stop bar 28 can slide horizontally on the horizontal extension bracket 25 and is fixed by bolts when it reaches the appropriate position to accommodate leaf springs of different sizes. The position stop bar 28 can constrain the leaf springs conveyed by the chain conveyor table 2 at the end point. At this time, the feeding control cylinder 26 pushes the L-shaped pusher plate 27, so that the L-shaped pusher plate 27 pushes the heated leaf spring horizontally between the lower bending die 7 and the upper bending die 15, realizing rapid centering and improving the quality and efficiency of bending forming. Depending on the actual usage scenario and requirements, the leaf springs conveyed by the chain conveyor 2 can also be grasped and placed between the lower bending die 7 and the upper bending die 15 by the existing robotic arm. The position of the robotic arm is fixed, and the leaf springs are grasped and placed between the lower bending die 7 and the upper bending die 15 along the direction of movement of the feeding control cylinder 26.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A straightening and bending device for plate spring quenching, characterized by, include: The U-shaped mounting bracket (1) and the chain conveyor (2) are arranged in a vertical position in the quenching pool and the chain conveyor (2) is arranged horizontally at the upper end of the quenching pool. The U-shaped mounting bracket (1) and the chain conveyor (2) are arranged close to each other. The U-shaped mounting bracket (1) is provided with a movable support (3) through a lifting assembly. The lifting assembly includes a quenching lifting control cylinder (4), an auxiliary guide rod (24) and two support guide rods (5). The bending assembly has a movable support (3) on one side near the chain conveyor table (2). The bending assembly includes a lower bending die (7) and an upper bending die (15). A lower core die (9) is movably inserted into the lower bending die (7), and an upper core die (17) is fixedly inserted into the upper bending die (15). The lower core die (9) is connected to the quenching lifting control cylinder (4).

2. A straightening and bending device for plate spring quenching according to claim 1, characterized in that: The two support guide rods (5) are respectively vertically installed on one side of the U-shaped mounting bracket (1). Two support sleeves are provided on one side of the movable support (3). The support sleeves are movably sleeved on the upper side of the two support guide rods (5). A support plate is provided horizontally at the lower end of the movable support (3). The support plate is movably sleeved on the two support guide rods (5).

3. A straightening and bending device for plate spring quenching according to claim 2, characterized in that: The auxiliary guide rod (24) is vertically installed on the side of the lower end of the U-shaped mounting bracket (1) away from the supporting guide rod (5). The plate of the movable support (3) is movably sleeved with the auxiliary guide rod (24). When the movable support (3) is located at the uppermost position inside the U-shaped mounting bracket (1), the upper end of the auxiliary guide rod (24) is flush with the upper end of the plate. The bottom support spring (23) is vertically installed at the lower end of the plate inside the U-shaped mounting bracket (1).

4. A shaping and bending device for quenching leaf springs according to claim 3, characterized in that: The movable support (3) has two fixed arms (6) horizontally arranged on the side away from the support guide rod (5). The lower bending die (7) is horizontally fixed above the two fixed arms (6) by bolts. The upper bending die (15) is located directly above the lower bending die (7). The lower bending die (7) and the upper bending die (15) are both provided with a combined mold cavity (8) on opposite sides. The lower core die (9) is vertically and movably inserted into the combined mold cavity (8), and the upper ends of the lower core die (9) and the lower bending die (7) are aligned.

5. A shaping and bending device for quenching leaf springs according to claim 4, characterized in that: The lower end of the lower core mold (9) is provided with a U-shaped control rod (10). The U-shaped control rod (10) is movably installed through the lower end of the bending lower mold (7). The lower end of the U-shaped control rod (10) located outside the bending lower mold (7) is provided with a horizontal lifting plate (11). The movable support (3) is located on one side of the lifting plate (11) and has a vertically opened misaligned slot (12). The lifting plate (11) is horizontally installed through the misaligned slot (12). The quenching lifting control cylinder (4) is vertically installed in the upper end of the U-shaped mounting bracket (1), and the lower end of the piston rod of the quenching lifting control cylinder (4) is connected to the upper end of the lifting plate (11) through the misaligned slot (12).

6. A shaping and bending device for quenching leaf springs according to claim 5, characterized in that: The upper end of the bending die (7) is vertically provided with several clearance grooves (13), and the lower core die (9) is provided with shaping blocks (14) on one side of the clearance grooves (13). The shaping blocks (14) are horizontally inserted into several clearance grooves (13), and the upper end of the shaping blocks (14) is aligned with the upper end of the lower core die (9).

7. A shaping and bending device for quenching leaf springs according to claim 6, characterized in that: The upper core mold (17) is fixedly inserted into the combined mold cavity (8) of the upper bending mold (15) by bolts. The lower end of the upper core mold (17) is flush with the lower end of the upper bending mold (15). The shapes of the lower bending mold (7) and the upper bending mold (15) are set on opposite sides.

8. A shaping and bending device for quenching leaf springs according to claim 7, characterized in that: The movable support (3) is vertically provided with a bending control cylinder (16) at the upper end of the bending upper die (15). The lower end of the bending control cylinder (16) is connected to the upper end of the bending upper die (15). Movable guide sleeves (19) are vertically provided on both sides of the upper core die (17). Movable guide rods (18) are vertically provided at the position of the movable support (3) at the movable guide sleeves (19). The movable guide sleeves (19) are movably connected to the movable guide rods (18).

9. A shaping and bending device for quenching leaf springs according to claim 8, characterized in that: The upper core mold (17) is vertically inserted with a combined positioning seat (20). A spring groove is opened at the upper end of the combined positioning seat (20). The lower end of the spring groove vertically penetrates the combined positioning seat (20) and is provided with a T-shaped positioning plate (21). The upper end of the T-shaped positioning plate (21) is located in the spring groove and is provided with a telescopic spring (22).

10. A shaping and bending device for quenching leaf springs according to claim 9, characterized in that: The chain conveyor (2) is provided with a horizontal extension bracket (25) on the side away from the movable support (3). A feeding control cylinder (26) is horizontally provided on the horizontal extension bracket (25). The feeding control cylinder (26) is close to the movable support (3) and passes through the horizontal extension bracket (25) on one side and is provided with an L-shaped pusher plate (27) horizontally. The upper end of the chain conveyor (2) is flush with the middle of the upper end of the bending die (7). A position stop bar (28) is fixed on one side of the horizontal extension bracket (25) by bolts.

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