A rolling device for automobile plate spring

Abstract

The utility model discloses a kind of automobile leaf spring rolling processing devices, relate to automobile leaf spring processing technical field, including lower die seat and the upper die frame of being set in the top of lower die seat, the upper die frame bottom is equipped with upper die, the upper die has multiple upper die cores, the top of lower die seat is equipped with lower die, the lower die has multiple lower die cores used in cooperation with upper die core, each lower die core both ends are equipped with the pressing plate for clamping leaf spring end, the pressing plate is fixed with pressing rod, the pressing rod penetrates pressing plate, the upper die is contacted with pressing rod and drives pressing rod and pressing plate to move down to clamp leaf spring when moving down, the bottom end of the pressing rod is equipped with first spring, the first spring is pushed after the upper die moves up pressing rod drives pressing plate to move up.The utility model links the fixing operation of both ends of leaf spring with the moving down operation of upper die, without manual operation, so as to avoid the influence of manual operation on leaf spring rolling efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive leaf spring processing technology, specifically to an automotive leaf spring rolling processing device. Background Technology

[0002] Automotive leaf springs, commonly known as leaf springs, are elastic elements composed of multiple bent spring steel sheets that absorb and release energy through the elastic deformation of the material. The rolling process of automotive leaf springs is the core of modern leaf spring manufacturing technology. First, red-hot steel is longitudinally rolled through a series of specially shaped rollers to obtain spring sheets that are thicker in the middle and thinner at both ends. Then, the spring sheets undergo quenching and tempering treatment. Finally, the spring sheets are placed in a bending die and hot-bent at a temperature maintained at the tempering temperature or slightly lower to achieve a precise pre-set camber. This process perfectly combines forming and heat treatment, producing leaf springs that are lightweight, long-lasting, high-performance, and highly comfortable.

[0003] In the aforementioned hot bending process, leaf springs utilize equipment as shown in prior art publication CN211464415U. This equipment fixes both ends of the spring leaf and then bends the middle of the leaf leaf to obtain a leaf spring with a preset camber. The fixing of the two ends of the spring leaf using this equipment is done manually. The efficiency of this manual operation directly impacts the overall efficiency of the leaf spring rolling process. Furthermore, manual operation significantly increases labor costs in mass-production leaf spring production lines. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an automotive leaf spring rolling processing device. By linking the fixing operation at both ends of the spring with the downward movement operation of the upper die, manual operation is eliminated, thereby avoiding the impact of manual operation on the leaf spring rolling efficiency and effectively solving the problems in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an automotive leaf spring rolling processing device, including a lower die base and an upper die frame disposed on the top of the lower die base. The upper die frame is provided with an upper die at its bottom, and the upper die has multiple upper die cores. The lower die base is provided with a lower die at its top, and the lower die has multiple lower die cores that cooperate with the upper die cores. Each lower die core is provided with a pressing plate at both ends for clamping the end of the spring sheet. A pressing rod is fixed on the pressing plate and passes through the pressing plate. When the upper die moves down, it contacts the pressing rod and drives the pressing rod and the pressing plate to move down to clamp the spring sheet. A first spring is provided at the bottom end of the pressing rod. After the upper die moves up, the first spring pushes the pressing rod to drive the pressing plate to move upward.

[0006] Preferably, each upper mold core has a hollow cylinder fixed at both ends. A round block is inserted into the bottom of the hollow cylinder. The diameter of the round block is the same as the diameter of the top end of the pressing rod. A connecting rod is fixed to the end of the round block away from the pressing rod. The end of the connecting rod away from the round block extends out of the hollow cylinder and is fixedly connected to an iron plate. An annular electromagnet is embedded in the top of the hollow cylinder. When the annular electromagnet is energized, it attracts the iron plate to fix the position of the round block.

[0007] Preferably, the lower mold core has a cavity for accommodating the first spring, the bottom end of the pressing rod is inserted into the cavity, and a tactile switch for controlling the on and off of the annular electromagnet is provided at the bottom of the cavity. A short rod is fixed to the bottom end of the pressing rod. When the pressing plate is pushed and pressed onto the surface of the spring by the lowered upper mold, the pressing rod drives the bottom end of the short rod to contact the tactile switch to control the annular electromagnet to be de-energized.

[0008] Preferably, a second spring is provided inside the hollow cylinder, one end of the second spring is fixed to the inner wall of the hollow cylinder, the other end of the second spring is fixed to the round block, and the second spring is sleeved on the outside of the connecting rod.

[0009] Preferably, each lower mold core has two cavities, and each lower mold core has one tactile switch installed in it.

[0010] Preferably, a hydraulic cylinder for pushing the upper mold downward is installed on the upper mold frame, and an extension rod is fixed between the piston rod end of the hydraulic cylinder and the upper mold.

[0011] Preferably, the top of the upper mold is fixed with a plurality of guide posts for limiting the movement direction of the upper mold, and the guide posts penetrate the upper mold frame.

[0012] Preferably, a plurality of columns are provided between the lower mold base and the upper mold frame, and the two ends of the columns are fixed to the lower mold base and the upper mold frame respectively.

[0013] Compared with the prior art, this utility model provides an automotive leaf spring rolling processing device, which has the following beneficial effects: 1. By setting the pressing rod to be pushed by the downward moving upper die, it can drive the pressing plate to automatically press the two ends of the spring sheet placed on the lower die core. The fixing operation of the two ends of the spring sheet is linked with the downward movement operation of the upper die, eliminating the need for manual operation and thus avoiding the impact of manual operation on the rolling efficiency of the leaf spring.

[0014] 2. By utilizing the first spring at the bottom of the pressing rod, it can automatically push the pressing plate upward after the upper die moves up, thereby releasing the pressing plate from fixing the two ends of the spring. This makes it easier to remove the bent spring from the lower die core, further simplifying the operation steps of leaf spring rolling and helping to improve the efficiency of leaf spring rolling. Attached Figure Description

[0015] Figure 1 This is a front view of the present invention; Figure 2 This is a perspective view of the present utility model; Figure 3 This is a schematic diagram of the lower mold base and multiple lower molds of this utility model; Figure 4 This is a cross-sectional view of the lower mold of this utility model; Figure 5 This is a schematic diagram of the upper mold frame and multiple upper molds of this utility model; Figure 6 This is a cross-sectional view of the hollow cylinder of this utility model.

[0016] In the picture: 1 Lower mold base, 2 Upper mold frame, 3 Upper mold, 31 Upper mold core, 4 Lower mold, 41 Lower mold core, 5 Hydraulic cylinder, 6 Guide column, 7 Pressing plate, 71 Pressing rod, 72 First spring, 73 Tactile switch, 74 Short rod, 75 Hollow cylinder, 76 Round block, 77 Connecting rod, 78 Iron plate, 79 Ring electromagnet, 710 Second spring, 8 Column, 9 Extension rod. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] To address the shortcomings of existing technologies, such as Figure 1 As shown, this utility model provides an automotive leaf spring rolling processing device, including a lower die base 1 and an upper die frame 2 disposed on the top of the lower die base 1. A plurality of columns 8 are provided between the lower die base 1 and the upper die frame 2. The two ends of the columns 8 are respectively fixed to the lower die base 1 and the upper die frame 2. The upper die frame 2 stands above the lower die base 1 through the columns 8.

[0019] The upper mold frame 2 has an upper mold 3 at its bottom, and the lower mold base 1 has a lower mold 4 at its top. A hydraulic cylinder 5 is installed on the upper mold frame 2 to push the upper mold 3 downward. Multiple guide posts 6 are fixed to the top of the upper mold 3 to restrict its movement direction. The guide posts 6 pass through the upper mold frame 2. An extension rod 9 is fixed between the piston rod end of the hydraulic cylinder 5 and the upper mold 3. By activating the hydraulic cylinder 5, the extension of the piston rod in the hydraulic cylinder 5 can push the upper mold 3 downward, thereby bending the spring placed on the lower mold 4. Moreover, the upper mold 3 in this invention has multiple upper mold cores 31, and the lower mold 4 has multiple lower mold cores 41 that cooperate with the upper mold cores 31. This arrangement allows multiple springs to be processed at once, improving processing efficiency.

[0020] Because the leaf spring is curved in the middle and horizontal at both ends, the two ends of the spring need to be pressed down during the bending process, such as... Figure 1-4As shown, each lower mold core 41 has a pressing plate 7 at both ends for clamping the end of the spring. Unlike the traditional manual operation of pressing the pressing plate 7 to press the ends of the spring, in this embodiment, the pressing plate 7 is fixed with a pressing rod 71, which passes through the pressing plate 7. The bottom end of the pressing rod 71 is provided with a first spring 72, and a cavity for accommodating the first spring 72 is opened in the lower mold core 41. The bottom end of the pressing rod 71 is inserted into the cavity. Each lower mold core 41 has two cavities. When the hydraulic cylinder 5 pushes the upper die 3 downward, the upper die core 31 will drive the pressing rod 71 and the pressing plate 7 downward to clamp the spring, without manual operation; when the hydraulic cylinder 5 drives the upper die 3 upward, the first spring 72, which was previously compressed by the pressing rod 71, will push the pressing rod 71 to drive the pressing plate 7 upward, so that the operator can remove the bent spring from the lower die core 41. The entire pressing and releasing operation of the pressing plate 7 does not require manual operation, thus effectively avoiding the impact of manual operation on the overall leaf spring rolling efficiency.

[0021] The above process links the pressing operation of the pressing plate 7 with the downward movement of the upper mold core 31. To prevent the presence of the pressing rod 71 from affecting the continued downward movement of the upper mold core 31, as follows: Figure 5 and Figure 6 As shown: Hollow cylinders 75 are fixed to both ends of each upper mold core 31. A circular block 76 is inserted into the bottom of the hollow cylinder 75. The diameter of the circular block 76 is the same as the diameter of the top end of the pressing rod 71. A connecting rod 77 is fixed to the end of the circular block 76 away from the pressing rod 71. The end of the connecting rod 77 away from the circular block 76 extends from the hollow cylinder 75 and is fixedly connected to an iron plate 78. A ring electromagnet 79 (a small ring electromagnet of model KK-P75 / 20 can be used) is embedded in the top of the hollow cylinder 75. When energized, the ring electromagnet 79 attracts the iron plate 78, which is used to fix the circular block 76. In the initial state, the annular electromagnet 79 is energized. At this time, the annular electromagnet 79 will attract and fix the iron plate 78 to the top of the hollow cylinder 75. At this time, the round block 76 is located in the opening at the bottom of the hollow cylinder 75. Therefore, when the upper mold core 31 moves down, the round block 76 will first contact the top of the pressing rod 71. Since the position of the round block 76 is fixed at this time, the upper mold core 31, which continues to move down, will push the pressing rod 71 through the round block 76 to drive the pressing plate 7 to move down until the pressing plate 7 presses on the surface of the spring. During this process, the bottom end of the pressing rod 71 will also move down in the cavity to compress the first spring 72. After the pressing plate 7 presses onto the surface of the spring, the upper mold core 31 needs to continue moving downwards. At this time, to prevent the pressing rod 71 from affecting the continued downward movement of the upper mold core 31, such as... Figure 4As shown, a tactile switch 73 for controlling the on / off state of the annular electromagnet 79 is also provided at the bottom of the cavity. Each lower mold core 41 has one tactile switch 73. The bottom of the pressing rod 71 is fixed with a short rod 74. When the upper mold core 31 drives the pressing plate 7 to press on the surface of the spring, the short rod 74 at the bottom of the pressing rod 71 will contact the tactile switch 73. Then the tactile switch 73 controls the annular electromagnet 79 to de-energize, so that the annular electromagnet 79 no longer attracts the iron plate 78. Therefore, at this time, the upper mold core 31 continues to move down, and the top of the pressing rod 71 will push the round block 76 to move up in the hollow cylinder 75. The top of the pressing rod 71 will also be inserted into the hollow cylinder 75 until the upper mold core 31 moves down to the set position and together with the lower mold core 41 bends the spring into a preset arch.

[0022] Then, the hydraulic cylinder 5 drives the upper mold 3 to move upward. During this process, the top of the pressing rod 71 will move out of the hollow cylinder 75. After losing the pressing action of the upper mold core 31, the pressing rod 71 will move upward under the action of the first spring 72, so that the short rod 74 no longer contacts the tactile switch 73, and the annular electromagnet 79 will be energized again.

[0023] During the upward movement of the upper mold 3, in order to allow the round block 76 to return to its initial position, a second spring 710 is provided inside the hollow cylinder 75. The second spring 710 is sleeved on the outside of the connecting rod 77. One end of the second spring 710 is fixed to the inner wall of the hollow cylinder 75, and the other end of the second spring 710 is fixed to the round block 76. When the top of the pressing rod 71 is inserted into the hollow cylinder 75, the round block 76 will compress the second spring 710. Therefore, after the upper mold 3 moves upward, the compressed second spring 710 will also push the round block 76 to move back to its starting position, so that the re-energized annular electromagnet 79 can attract and fix the iron plate 78 to the top of the hollow cylinder 75 again for use in the next spring bending process.

[0024] In addition, it is worth noting that the tactile switch 73 used in this utility model is a normally closed tactile switch (a tactile switch of model TS-1048D can be selected). When the short rod 74 is pressed on the tactile switch 73, the circuit where the ring electromagnet 79 is located is disconnected, and the ring electromagnet 79 is in a de-energized state. The specific circuit structure and circuit design involved can be realized by existing technical means, and will not be described in detail here.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An automotive leaf spring rolling processing apparatus, comprising a lower die holder (1) and an upper die frame (2) disposed on the top of the lower die holder (1), characterized in that: The upper mold frame (2) is provided with an upper mold (3) at the bottom. The upper mold (3) has multiple upper mold cores (31). The lower mold base (1) is provided with a lower mold (4) at the top. The lower mold (4) has multiple lower mold cores (41) that cooperate with the upper mold cores (31). Each lower mold core (41) has a pressing plate (7) at both ends for clamping the end of the spring. A pressing rod (71) is fixed on the pressing plate (7). The pressing rod (71) passes through the pressing plate (7). When the upper mold (3) moves down, it contacts the pressing rod (71) and drives the pressing rod (71) and the pressing plate (7) to move down to clamp the spring. A first spring (72) is provided at the bottom of the pressing rod (71). After the upper mold (3) moves up, the first spring (72) pushes the pressing rod (71) to drive the pressing plate (7) to move upward.

2. The automotive leaf spring rolling processing apparatus according to claim 1, characterized in that: Each upper mold core (31) has a hollow cylinder (75) fixed at both ends. A round block (76) is inserted into the bottom of the hollow cylinder (75). The diameter of the round block (76) is the same as the diameter of the top end of the pressing rod (71). A connecting rod (77) is fixed to the end of the round block (76) away from the pressing rod (71). The end of the connecting rod (77) away from the round block (76) extends out from the hollow cylinder (75) and is fixedly connected to an iron plate (78). A ring electromagnet (79) is embedded at the top of the hollow cylinder (75). When the ring electromagnet (79) is energized, it attracts the iron plate (78) to fix the position of the round block (76).

3. The automotive leaf spring rolling processing apparatus according to claim 2, characterized in that: The lower mold core (41) has a cavity for accommodating the first spring (72). The bottom end of the pressing rod (71) is inserted into the cavity. A tactile switch (73) for controlling the on / off state of the annular electromagnet (79) is provided at the bottom end of the cavity. A short rod (74) is fixed at the bottom end of the pressing rod (71). When the pressing plate (7) is pushed and pressed onto the surface of the spring by the lowered upper mold (3), the pressing rod (71) drives the bottom end of the short rod (74) to contact the tactile switch (73) to control the annular electromagnet (79) to be de-energized.

4. The automotive leaf spring rolling processing apparatus according to claim 2, characterized in that: The hollow cylinder (75) is provided with a second spring (710). One end of the second spring (710) is fixed to the inner wall of the hollow cylinder (75), and the other end of the second spring (710) is fixed to the round block (76). The second spring (710) is sleeved on the outside of the connecting rod (77).

5. The automotive leaf spring rolling processing apparatus according to claim 3, characterized in that: Each lower mold core (41) has two cavities, and each lower mold core (41) has one tactile switch (73).

6. The automotive leaf spring rolling processing apparatus according to claim 1, characterized in that: The upper mold frame (2) is equipped with a hydraulic cylinder (5) for pushing the upper mold (3) downward. An extension rod (9) is fixed between the piston rod end of the hydraulic cylinder (5) and the upper mold (3).

7. The automotive leaf spring rolling processing apparatus according to claim 1, characterized in that: The top of the upper mold (3) is fixed with a plurality of guide posts (6) for limiting the movement direction of the upper mold (3), and the guide posts (6) penetrate the upper mold frame (2).

8. The automotive leaf spring rolling processing apparatus according to claim 1, characterized in that: Multiple columns (8) are provided between the lower mold base (1) and the upper mold frame (2), and the two ends of the columns (8) are fixed to the lower mold base (1) and the upper mold frame (2) respectively.

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