Automobile tail gate spring secondary automatic bending equipment

Abstract

The utility model relates to automobile parts processing equipment technical field, concretely is a kind of automobile tail door spring secondary automatic bending equipment, including fixed panel, spring positioning clamping mechanism and bending assembly.Spring positioning clamping mechanism includes the V-shaped locating block on fixed panel, locating rack and the compression cylinder of top installation, and the compression cylinder is connected with the compression block of elastic rubber pad by piston rod, realizes the flexible compression of spring body, and bending assembly is composed of the locating mechanism and bending mechanism of symmetrical arrangement in the both sides of fixed panel:locating mechanism includes locating cylinder and the locating die with locating groove, and bending mechanism includes drive motor, speed reducer and bending die, and bending die front end is equipped with bending shaft, and drive motor is driven bending die rotation through speed reducer, makes bending shaft adhere to the connecting end of spring and complete secondary bending around locating die.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive parts processing equipment, specifically to a secondary automatic bending device for automotive tailgate springs. Background Technology

[0002] High-stress helical springs widely used in automotive tailgate support systems typically require two precise bends at their ends to form hook-like structures at specific angles and spatial positions, ensuring reliable connection with the vehicle body frame and tailgate hinges. This bending process demands extremely high precision in angle, springback control, and consistency, directly impacting tailgate opening force, closing stability, and service life. Currently, the industry commonly employs the following methods for the secondary bending of such springs: First, manual bending using simple clamps, relying on operator experience, resulting in low efficiency, poor consistency, and safety hazards; second, using a single-station semi-automatic bending machine, requiring two clamping operations to complete the initial and final bends, during which the spring is prone to displacement or springback, leading to inconsistent bending benchmarks and causing assembly interference or support force deviations; third, while some automated equipment can achieve continuous bending, its complex structure, high cost, and lack of effective positioning and flexible clamping of the spring body make it difficult to accommodate the dimensional tolerances of different batches of springs.

[0003] In existing technologies, common bending devices often integrate positioning and bending functions on the same side, resulting in asymmetrical spring force and a tendency to twist and deform. Furthermore, the positioning and bending dies are inconvenient to replace, leading to poor versatility. In addition, most devices do not consider spring surface protection; rigid clamping can easily cause scratches or indentations, affecting product appearance and fatigue performance. Although some devices incorporate pneumatic or servo drives, the lack of precise guidance and force application to the spring connection end during bending makes it difficult to achieve stable rotational bending around the positioning die. Especially for secondary forming requirements with complex spatial angles, existing devices often cannot balance accuracy and efficiency. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a secondary automatic bending device for automobile tailgate springs.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A secondary automatic bending device for automotive tailgate springs, comprising a fixed panel, a spring positioning and clamping mechanism, and a bending assembly. The spring positioning mechanism includes a V-shaped positioning block, a positioning frame, and a pressing cylinder. The bending mechanism includes a positioning mechanism and a bending mechanism, which are symmetrically installed on both sides of the fixed panel. The V-shaped positioning block is located on the fixed panel between the positioning mechanism and the bending mechanism. The positioning frame is installed on the fixed panel and located at the side end of the V-shaped positioning block. The pressing cylinder is fixedly installed on the top of the positioning frame, and a pressing block is mounted on the output end of the pressing cylinder via a piston rod. The positioning mechanism includes a positioning cylinder and a positioning mold. The bending mechanism includes a drive motor, a reduction motor, and a bending mold.

[0006] Preferably, the positioning mold is provided with a positioning groove, the end face of the positioning mold is a heart-shaped structure, and the positioning groove is located at the center of the heart-shaped structure.

[0007] More preferably, the front side of the bending die is provided with a bending shaft, the bending shaft is located on the outer contour of the positioning die, the part of the bending shaft that fits the spring and extends out of the positioning groove, and the drive motor drives the bending die to rotate.

[0008] Preferably, the output shaft of the drive motor is connected to the input end of the geared motor, and the output end of the geared motor is connected to the bending die via a rotating shaft.

[0009] Preferably, the positioning mold is sleeved on the output rod of the positioning cylinder, the bending mold is sleeved on the end of the rotating shaft, and connecting bolts pass through the fitting points of the bending mold and the rotating shaft, as well as the fitting points of the positioning mold and the output rod.

[0010] Preferably, the lower surface of the clamping block is embedded with an elastic rubber pad.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a secondary automatic bending device for automobile tailgate springs, which has the following beneficial effects: The symmetrically arranged positioning and bending mechanisms on the fixed panel, together with the centrally positioned V-shaped positioning block, achieve stable support and precise end positioning of the spring body; the positioning groove on the positioning mold, and the heart-shaped end face of the positioning mold, facilitate the 90-degree bending of the spring connection end.

[0012] The clamping cylinder drives the clamping block to press down, and the spring is flexibly contacted by an elastic rubber pad, which not only prevents surface damage but also accommodates slight dimensional fluctuations between different batches of springs, improving clamping reliability. The bending mechanism uses a drive motor to rotate the bending die via a reduction motor. The bending shaft is used to fit the protruding connecting section of the spring and applies force around the positioning die to achieve high repeatability and secondary forming, which is especially suitable for tailgate spring hook structures with complex spatial angles.

[0013] Both the positioning mold and the bending mold can be detached and installed via connecting bolts, facilitating quick replacement to adapt to different spring models and improving equipment versatility. The overall structure is compact and the operation is highly coordinated, completing the entire process of positioning, clamping, and bending without manual intervention. This significantly reduces labor intensity and human error, while improving product consistency and production cycle time, meeting the high-precision, high-volume manufacturing needs of automotive parts. Attached Figure Description

[0014] Figure 1 This is a top view of the front structure of this utility model; Figure 2 This is a schematic diagram of the rear view structure of this utility model; Figure 3 This is a top view of the rear structure of this utility model; In the diagram: 1. Fixed panel; 2. Drive motor; 3. Gear motor; 4. Positioning cylinder; 5. Positioning frame; 6. Clamping cylinder; 7. V-shaped positioning block; 8. Positioning mold; 9. Bending mold; 10. Positioning groove; 11. Bending shaft; 12. Clamping block; 13. Elastic rubber pad. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-3This utility model discloses a secondary automatic bending device for a car tailgate spring, comprising a fixed panel 1, a spring positioning and clamping mechanism, and a bending assembly. The spring positioning mechanism includes a V-shaped positioning block 7, a positioning frame 5, and a pressing cylinder 6. The bending mechanism includes a positioning mechanism and a bending mechanism, which are symmetrically installed on both sides of the fixed panel 1. The V-shaped positioning block 7 is located on the fixed panel 1 and between the positioning mechanism and the bending mechanism. The positioning frame 5 is located on the fixed panel 1 and at the side end of the V-shaped positioning block 7. The pressing cylinder 6 is fixedly installed on the top of the positioning frame 5, and a pressing block 12 is installed at the output end of the pressing cylinder 6 via a piston rod. The positioning mechanism includes a positioning cylinder 4 and a positioning mold 8. The bending mechanism includes a drive motor 2, a reduction motor 3, and a bending mold 9.

[0017] This technical solution achieves high-precision secondary bending of automotive tailgate springs through a coordinated mechanism of precise spring positioning, simultaneous bending at both ends, and automated cycling. The core logic is as follows: The spring positioning and clamping mechanism performs three-dimensional positioning of the spring in radial, axial, and circumferential directions to ensure precise bending. The symmetrical bending assembly applies bending force to the connecting sections at both ends of the spring simultaneously, and achieves the preset angle forming through the cooperation of the positioning mold 8 and the bending mold 9; The drive transmission system provides stable torque, causing the bending die 9 to rotate at a set angle to complete the secondary bending of the spring; In this technical solution, the positioning cylinder 4, clamping cylinder, and drive motor 2 are controlled by a mature PLC programmable controller, which controls the output stroke of the clamping cylinder 6 and the positioning cylinder 4, as well as the rotation stroke of the drive motor 2. This is suitable for batch processing of various automotive tailgate spring specifications.

[0018] The spring positioning and clamping mechanism performs radial, axial, and circumferential three-dimensional positioning of the car tailgate spring, ensuring that the spring does not move during bending and that the bending part and angle are precise.

[0019] The V-shaped positioning block 7 is located on the fixed panel 1, between the positioning mechanism and the bending mechanism. Its V-shaped groove opening angle of 90°-120° is adapted to the diameter of the spring to be bent, so as to radially position the spring and restrict its left and right movement.

[0020] Positioning frame 5 and clamping cylinder 6: Positioning frame 5 is located on fixed panel 1, at the side end of V-shaped positioning block 7; clamping cylinder 6 is fixed to the top of positioning frame 5, and its output end is connected to clamping block 12 through piston rod. Elastic rubber pad 13 is embedded on the lower surface of clamping block 12. During operation, the clamping cylinder 6 drives the clamping block 12 to move downwards, and the elastic rubber pad 13 adheres to the upper surface of the spring to position the spring axially and circumferentially, restricting its forward and backward movement and rotation, and preventing the spring from shifting or rotating when bent.

[0021] The positioning mechanism includes a positioning cylinder 4 and a positioning mold 8. The positioning mold 8 is fitted onto the output rod of the positioning cylinder 4 and locked by connecting bolts. The positioning mold 8 is provided with a positioning groove 10. The end face of the positioning mold 8 is a heart-shaped structure, and the positioning groove 10 is located at the center of the heart-shaped structure, which is compatible with the connecting end of the spring, making it easy for the connecting end of the spring to be bent at 90 degrees.

[0022] When installing the spring, the positioning cylinder 4 drives the positioning mold 8 to approach the V-shaped positioning block 7, and the connecting end of the spring is inserted into the positioning groove 10 to achieve precise alignment of the connecting end. Usually, the connecting end of the spring is a straight structure before bending, to ensure that the initial position of the connecting end of the spring is consistent when bending.

[0023] The bending mechanism applies bending force to the connecting sections at both ends of the spring, forming them at preset angles, such as 90° or 135°, to meet the assembly and stress requirements of the car tailgate.

[0024] The bending die 9 and the bending shaft 11 are fitted onto the end of the rotating shaft and locked by connecting bolts; the bending shaft 11 is provided on the front side of the bending die 9, and the bending shaft 11 is located on the outer contour of the positioning die 8, fitting the part of the spring connecting end that protrudes from the positioning groove 10: When the drive motor 2 drives the bending die 9 to rotate, the bending shaft 11 squeezes the spring connection end, causing it to bend around the outer contour of the positioning die 8. The bending angle is precisely controlled by the rotation angle of the bending die 9. For example, if it rotates 90°, the spring bends 90°.

[0025] Drive motor 2 and geared motor 3: The output shaft of drive motor 2 is connected to the input end of geared motor 3, and the output end of geared motor 3 is connected to bending die 9 via a rotating shaft. The drive motor 2 provides high-speed power, and the geared motor 3 amplifies the torque and reduces the speed, ensuring that the bending die 9 obtains stable low-speed, high-torque output to meet the force and precision requirements of spring bending.

[0026] Detailed Workflow Phase 1: Equipment Initialization and Spring Feeding Equipment reset: Positioning cylinder 4 drives positioning mold 8 to return to the initial position, clamping cylinder 6 drives clamping block 12 to rise, and bending mold 9 rotates to the initial angle; Spring placement: The operator places the tailgate spring to be processed into the V-groove of the V-positioning block 7, ensuring that the connecting end of the spring to be bent faces the positioning mechanism and the bending mechanism. Preliminary positioning: The positioning cylinder 4 is activated, driving the positioning mold 8 to approach the V-shaped positioning block 7. The connecting end of the spring is inserted into the positioning groove 10 of the positioning mold 8, completing the preliminary alignment of the connecting end.

[0027] Phase 2: Three-dimensional precision clamping of springs Axial and circumferential positioning: When the clamping cylinder 6 is activated, it drives the clamping block 12 to move downward. The elastic pad 13 adheres to the upper surface of the spring, pressing the spring between the V-shaped positioning block 7 and the clamping block 12, thus restricting the axial movement and circumferential rotation of the spring. Positioning Confirmation: In actual use, a conventional sensor, such as the Hikvision MV-CA020-10GM series video recognition sensor, can be configured to detect whether the spring has completed three-dimensional positioning. If the positioning is in place, proceed to the next step; if not, an alarm prompt will be issued through the PLC programmable controller for adjustment.

[0028] Phase 3: Simultaneous bending and forming at both ends Bending start: Drive motor 2 starts, and power is transmitted to the rotating shaft via geared motor 3, which drives the bending die 9 to rotate; Bending process: The bending shaft 11 of the bending die 9 squeezes the spring connection end, causing it to bend around the outer contour of the positioning die 8. The bending angle is controlled by the rotation angle of the drive motor 2. If a 90° bend is required, the drive motor 2 controls the bending die 9 to rotate 90°. Bending completion detection: The equipment uses a video recognition sensor to detect whether the bending angle has reached the preset value. If it has, it proceeds to the next step; otherwise, it adjusts the rotation parameters of the drive motor 2.

[0029] Phase 4: Equipment Reset and Spring Unloading Mold reset: Drive motor 2 rotates in the opposite direction, driving bending mold 9 back to the initial position; positioning cylinder 4 drives positioning mold 8 to retract, and clamping cylinder 6 drives clamping block 12 to rise; Spring Removal: The operator removes the spring, which has undergone a second bend, from the V-shaped positioning block 7, completing one processing cycle; Cyclic production: Repeating stages 1-4 to achieve automated mass production of automotive tailgate springs.

[0030] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A secondary automatic bending device for automobile tailgate springs, characterized in that, The assembly includes a fixed panel (1), a spring positioning clamping mechanism, and a bending assembly. The spring positioning mechanism includes a V-shaped positioning block (7), a positioning frame (5), and a pressing cylinder (6). The bending mechanism includes a positioning mechanism and a bending mechanism, which are symmetrically installed on both sides of the fixed panel (1). The V-shaped positioning block (7) is located on the fixed panel (1) and between the positioning mechanism and the bending mechanism. The positioning frame (5) is located on the fixed panel (1) and at the side end of the V-shaped positioning block (7). The pressing cylinder (6) is fixedly installed on the top of the positioning frame (5). A pressing block (12) is installed on the output end of the pressing cylinder (6) through a piston rod. The positioning mechanism includes a positioning cylinder (4) and a positioning mold (8). The bending mechanism includes a drive motor (2), a reduction motor (3), and a bending mold (9).

2. The automatic secondary bending device for automobile tailgate springs according to claim 1, characterized in that, The positioning mold (8) is provided with a positioning groove (10), the end face of the positioning mold (8) is a heart-shaped structure, and the positioning groove (10) is located at the center of the heart-shaped structure.

3. The automatic secondary bending device for automobile tailgate springs according to claim 2, characterized in that, The bending die (9) is provided with a bending shaft (11) on the front side, and the bending shaft (11) is located on the outer contour of the positioning die (8).

4. The automatic secondary bending device for automobile tailgate springs according to claim 3, characterized in that, The output shaft of the drive motor (2) is connected to the input end of the geared motor (3), and the output end of the geared motor (3) is connected to the bending die (9) through a rotating shaft.

5. The automatic secondary bending device for automobile tailgate springs according to claim 4, characterized in that, The positioning mold (8) is sleeved on the output rod of the positioning cylinder (4), the bending mold (9) is sleeved on the end of the rotating shaft, and connecting bolts are passed through the fitting parts of the bending mold (9) and the rotating shaft and the fitting parts of the positioning mold (8) and the output rod.

6. The automatic secondary bending device for automobile tailgate springs according to claim 5, characterized in that, The lower surface of the clamping block (12) is embedded with an elastic rubber pad (13).

Images