A straightening machine for hangers

Abstract

The application provides a straightening machine for a hanger, relates to the technical field of hanger straightening, and comprises a straightening platform and a straightening mechanism arranged on the straightening platform; a bearing plate is transversely and slidably connected to the straightening platform; a moving mechanism is arranged on the bearing plate; a bearing block is arranged on the moving mechanism; the bearing block is used for bearing a welding plate; a placing block is fixedly connected to the bearing block; the placing block is used for abutting against the side wall of the welding plate; a placing groove is arranged on the placing block; and the placing groove is used for placing a lifting hook. The application can improve straightening positioning accuracy, reduce stress concentration and improve straightening quality.

Description

Technical Field

[0001] This application relates to the field of hanger straightening technology, specifically to a hanger straightening machine. Background Technology

[0002] In the industrial coating field, whether it's the production of automotive parts, appliance casings, or hardware accessories, coating quality directly determines the product's appearance, corrosion resistance, and service life. For workpieces with relatively regular structures and suitable for suspension, such as door handles, metal brackets, and small mechanical parts, the use of specialized hangers becomes a key step in improving coating quality. These hangers are typically customized according to the workpiece's shape, size, and coating requirements, using hooks, slots, or clamps to stably suspend the workpiece. During painting or powder coating, the suspended workpiece is fully exposed to the spraying range of the coating material, ensuring uniform contact with paint or powder coating on both the horizontal sides and the vertical top and bottom. This not only effectively avoids coating dead zones caused by the lack of contact with coating material when workpieces are stacked, but also reduces coating damage caused by friction between workpieces. Furthermore, it facilitates the natural dripping of excess coating material, reducing the incidence of defects such as excessive coating thickness and runs, fundamentally ensuring the consistency and uniformity of the coating.

[0003] During the subsequent processing, storage, and use of hangers, the release of residual stress can lead to various deformation problems. For example, if residual stress is not eliminated after bending the main body of a long, narrow hanger, the compressive and tensile stresses at the bending point will gradually reach equilibrium after a period of storage. This may cause the hanger to bend or laterally, resulting in straightness deviations exceeding usage requirements. For hangers with multiple hooks, stress release at the bend of each hook may cause changes in the hook angle, leading to hook tilting or misalignment. This not only affects the suspension stability of the workpiece but may also create new coating dead zones due to workpiece displacement during the coating process. Furthermore, when the hanger bears the weight of the workpiece or experiences temperature changes, the release rate of residual stress accelerates, making deformation problems more prominent. In severe cases, this can even lead to hanger breakage, affecting production safety and coating efficiency.

[0004] Referring to the Chinese patent document CN203737763U entitled "Straightening Machine", this device allows each non-circular straightening plate to move radially relative to the straightening plate fixing post via at least one elongated micro-adjustment hole, thereby adjusting the distance between the circular and non-circular straightening plates to accommodate bolts of different sizes. This is done without moving the entire straightening plate fixing post, making adjustment quite convenient. The straightened bolts fall into the output track and are positioned within the grooves during movement, ensuring neat alignment when fed into the collection box. At least one support roller can stop and support the bolts, ensuring that the bolt's axial direction is parallel to the axial direction of the two straightening plate fixing posts.

[0005] Regarding the aforementioned technical solutions, during the production process, lifting hooks need to be welded onto the hanger. Welding these hooks can easily cause deformation of the welded plate surface, necessitating straightening after welding. However, due to the obstruction of the lifting hooks, the straightening process must avoid their positions. Manual feeding is not only labor-intensive but also lacks precise control over the straightening position. The three-point straightening device is poorly adaptable to different curvatures, especially at the connection between the welded plate and the lifting hooks, where traditional straightening mechanisms struggle to achieve accurate positioning and uniform force distribution. Furthermore, stress concentration during straightening can easily lead to workpiece deformation, affecting the straightening quality. Summary of the Invention

[0006] In view of this, this application provides a straightening machine for hanging fixtures, which aims to solve the problem of stress concentration when straightening sheet metal.

[0007] The present application provides a straightening machine for a hanging device, which adopts the following technical solution: a straightening platform and a straightening mechanism disposed on the straightening platform; a receiving plate is slidably connected to the straightening platform, a moving mechanism is disposed on the receiving plate, a receiving block is disposed on the moving mechanism, the receiving block is used to receive the welding plate, a placement block is fixedly connected to the receiving block, the placement block is used to abut against the side wall of the welding plate, and a placement groove is provided on the placement block for placing the lifting hook.

[0008] When the fixture enters the straightening area via the conveyor, the moving mechanism is activated, driving the receiving plate to move laterally along the straightening platform to the predetermined position. Subsequently, the receiving block moves longitudinally under the action of the sliding block, ensuring that the side wall of the placement block precisely abuts against the edge of the welding plate, thus completing the longitudinal positioning of the welding plate. Simultaneously, the lifting hook is embedded in the placement groove on the top of the placement block to prevent deformation of the hook under stress during subsequent straightening processes.

[0009] Next, the straightening mechanism begins its work, straightening the fixture in sections. During the section straightening process, the moving mechanism adjusts the position of the receiving plate segment by segment according to the set step distance, ensuring that the entire length of the fixture is fully straightened in this way.

[0010] This application achieves automated segmented straightening of the entire length of the hanger, effectively eliminating unstraightened areas. The mechanical positioning system ensures consistent positioning accuracy for each straightening operation, preventing secondary bending caused by manual operation. The dual-station structure automatically switches straightening modes for different curvatures, improving the straightening pass rate. The combination design of the placement groove and the arc contact surface disperses stress during straightening, preventing structural interference between the hook and the straightening mechanism.

[0011] Optionally, the moving mechanism includes a sliding block slidably connected to the receiving plate, the sliding block and the receiving plate being slidably connected, and the receiving plate being capable of sliding longitudinally on the sliding block.

[0012] Optionally, the moving mechanism further includes a moving cylinder fixedly connected to the receiving plate. The output shaft of the moving cylinder is fixedly connected to the sliding block. An adjusting cylinder is fixedly connected to the sliding block. The adjusting cylinder is used to drive the receiving block to move vertically.

[0013] Traditional manual positioning relies on operator experience to adjust the workpiece position, resulting in large positioning errors and low efficiency. This solution achieves mechanical positioning of the receiving block in the horizontal and vertical directions through the coordinated control of the moving cylinder and the adjusting cylinder, eliminating positional deviations caused by manual operation and ensuring that the welding plate remains in the predetermined position throughout the straightening process.

[0014] Optionally, the straightening mechanism includes a first abutment block fixedly connected to the straightening platform, a hydraulic cylinder fixedly connected to the straightening platform, a connecting block fixedly connected to the output shaft of the hydraulic cylinder, a second abutment block slidably connected to the connecting block, the second abutment block being disposed above the first abutment block, and the first abutment block and the second abutment block being used to straighten the welding plate.

[0015] This application solves the problem of excessive or insufficient straightening caused by insufficient precision in manual operation, and eliminates the risk of reverse bending caused by single-point pressure. The synergistic effect of the double abutment blocks makes the straightening force distribution more uniform, and the sliding connection structure ensures that the pressure angle automatically matches the actual deformation state of the workpiece, thereby improving straightening accuracy and process stability, and is especially suitable for fixture straightening operations with non-uniform bending characteristics.

[0016] Optionally, a movable cylinder is fixedly connected to the connecting block, and the output shaft of the movable cylinder is fixedly connected to the second abutment block.

[0017] Optionally, the first abutment block and the second abutment block are configured as arc-shaped to reduce stress concentration on the welding plate and improve the straightening quality.

[0018] This application can dynamically control the position and intensity of the straightening force, effectively solving the problem of insufficient straightening accuracy caused by the fixed force application point in traditional straightening devices, while avoiding human operation errors and improving the consistency and reliability of the straightening process.

[0019] Optionally, a misalignment block is fixedly connected to the second abutment block, the position of the misalignment block and the position of the lifting hook are misaligned, and the lifting hook is positioned within the misalignment block.

[0020] Optionally, an auxiliary top block is fixedly connected to the first abutment block. The auxiliary top block is used to accurately position the lifting hook and can disperse stress.

[0021] Optionally, a receiving rotating rod is rotatably connected to the receiving plate, and a rotating shaft is rotatably connected to the receiving rotating rod, the rotating shaft being engaged with the straightening platform.

[0022] Optionally, a rotating motor is fixedly connected to the receiving plate, a rotating gear is fixedly connected to the output shaft of the rotating motor, and a movable rack is fixedly connected to the straightening platform. The movable rack meshes with the rotating gear and can move the receiving plate under the drive of the rotating motor.

[0023] Traditional hanger straightening methods rely on manual pushing or hydraulic drive for positioning, which suffers from low positioning accuracy and inability to adapt to multi-station switching. This solution combines gear and rack transmission with motor control to achieve automated and precise hanger conveying, overcoming the technical shortcomings of low efficiency and susceptibility to secondary bending caused by manual operation.

[0024] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0025] 1. This application achieves automated segmented straightening of the entire length of the hanger, effectively eliminating unstraightened areas. The mechanical positioning system ensures the repeatability of positional accuracy for each straightening operation, avoiding secondary bending caused by manual operation. The dual-station structure can automatically switch straightening modes for different curvatures, improving the straightening pass rate. The combination design of the placement groove and the arc contact surface disperses stress during the straightening process, preventing structural interference between the hook and the straightening mechanism.

[0026] 2. Traditional manual positioning relies on operator experience to adjust the workpiece position, resulting in large positioning errors and low efficiency. This solution achieves mechanical positioning of the receiving block in the horizontal and vertical directions through the coordinated control of the moving cylinder and the adjusting cylinder, eliminating positional deviations caused by manual operation and ensuring that the welding plate remains in the predetermined position throughout the straightening process.

[0027] 3. This application solves the problem of excessive or insufficient straightening caused by insufficient precision in manual operation, and eliminates the risk of reverse bending caused by single-point pressure. The synergistic effect of the double abutment blocks makes the straightening force distribution more uniform, and the sliding connection structure ensures that the pressure angle automatically matches the actual deformation state of the workpiece, thereby improving straightening accuracy and process stability, and is especially suitable for fixture straightening operations with non-uniform bending characteristics.

[0028] 4. This application can dynamically control the position and pressure intensity of the straightening force, effectively solving the problem of insufficient straightening accuracy caused by the fixed force application point of traditional straightening devices, while avoiding human operation errors and improving the consistency and reliability of the straightening process. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a straightening machine for a hanger in this embodiment;

[0030] Figure 2 This is a schematic diagram of the structure of the receiving plate and receiving block in this embodiment;

[0031] Figure 3 This is a schematic diagram of the structure that supports the rotating rod and the rotating shaft in this embodiment;

[0032] Figure 4 This is a schematic diagram of the sliding block and the moving cylinder in this embodiment;

[0033] Figure 5 This is a schematic diagram of the moving rack in this embodiment;

[0034] Figure 6 This is a schematic diagram of the structure of the first abutment block and the connecting block in this embodiment;

[0035] Figure 7 This is a schematic diagram of the structure of the second abutment block and the movable cylinder in this embodiment.

[0036] Explanation of reference numerals in the attached drawings: 1. Straightening platform; 2. Straightening mechanism; 21. First abutment block; 22. Hydraulic cylinder; 23. Connecting block; 24. Second abutment block; 25. Movable cylinder; 26. Misalignment block; 27. Auxiliary top block; 3. Support plate; 31. Support block; 32. Placement block; 33. Placement groove; 4. Moving mechanism; 41. Sliding block; 42. Moving cylinder; 43. Adjusting cylinder; 5. Supporting rotating rod; 51. Rotating shaft; 6. Rotating motor; 61. Rotating gear; 62. Moving rack. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will be combined with the embodiments of this application. Figures 1-7The technical solutions of the embodiments of this application are clearly and completely described herein. All other embodiments obtained by those skilled in the art based on the described embodiments are within the scope of protection of this application.

[0038] like Figure 1 As shown, this embodiment provides a straightening machine for hanging fixtures, including a straightening platform 1, a straightening mechanism 2, a receiving mechanism, and a moving mechanism 4. The straightening platform 1 is set on a horizontal plane, the straightening mechanism 2 is used to straighten the hanging fixtures, the receiving mechanism is used to receive the hanging fixtures to facilitate their placement, and the moving mechanism 4 is used to move the hanging fixtures.

[0039] like Figure 6 and Figure 7 As shown, the straightening mechanism 2 includes a first abutment block 21, a hydraulic cylinder 22, a connecting block 23, a second abutment block 24, and a movable cylinder 25. The first abutment block 21 is fixedly connected to the straightening platform 1 and is located at the center of the straightening platform 1. The first abutment block 21 is arc-shaped. The hydraulic cylinder 22 is located on the straightening platform 1 and is located above the first abutment block 21. The connecting block 23 is fixedly connected to the output shaft of the hydraulic cylinder 22. The second abutment block 24 is slidably connected to the connecting block 23 and is located at the end of the connecting block 23 facing closer to the first abutment block 21. The movable cylinder 25 is fixedly connected to the connecting block 23, and the output shaft of the movable cylinder 25 is fixedly connected to the second abutment block 24. The contact surface between the second abutment block 24 and the first abutment block 21 is arc-shaped.

[0040] When the welding plate is conveyed to the straightening station, the hydraulic cylinder 22 drives the output shaft to move downwards, causing the second abutment block 24 to move towards the first abutment block 21. The first abutment block 21 serves as a fixed support surface supporting the bottom of the welding plate, while the second abutment block 24 applies pressure to the top of the welding plate under the thrust of the hydraulic cylinder 22 through a sliding connection structure. Because the second abutment block 24 has a degree of sliding freedom with respect to the output shaft of the hydraulic cylinder 22, the contact angle can be automatically adjusted according to the actual bending shape of the welding plate during the pressure application process, avoiding localized stress concentration caused by rigid pressure. When the hydraulic cylinder 22 continuously applies pressure, the clamping force formed by the first abutment block 21 and the second abutment block 24 forces the welding plate to undergo plastic deformation, gradually eliminating its bending.

[0041] After the hydraulic cylinder 22 is activated, its output shaft drives the movable cylinder 25 to move longitudinally. The movable cylinder 25 further drives the second abutment block to adjust its position. The output shaft of the movable cylinder 25 is fixedly connected to the second abutment block 24. When the movable cylinder 25 extends or retracts, the position of the second abutment block 24 can be precisely adjusted. For example, during the straightening process, if the operator observes that the local bending curvature of the welded plate is large, the downward pressure of the second abutment block 24 can be adjusted by the movable cylinder 25 to avoid reverse bending due to excessive force. At the same time, the linkage design between the movable cylinder 25 and the hydraulic cylinder 22 can realize dynamic control of the straightening stroke to adapt to the straightening requirements of different degrees of bending.

[0042] Among them, such as Figure 6 As shown, a misalignment block 26 is fixedly connected to the second abutment block 24. The position of the misalignment block 26 is offset from the position of the lifting hook, and the lifting hook is positioned within the misalignment block 26. An auxiliary top block 27 is fixedly connected to the first abutment block 21. The auxiliary top block 27 is used to accurately position the lifting hook and to distribute stress.

[0043] When the welding plate is placed on the receiving block 31, the lifting hook is embedded in the corresponding groove or gap of the misalignment block 26. After the straightening mechanism 2 is activated, the second abutment block 24 moves towards the first abutment block 21 under hydraulic drive. At this time, the misaligned arrangement of the misalignment block 26 and the lifting hook allows the straightening force to be evenly transmitted to the main body area of ​​the welding plate through the second abutment block 24. Due to the physical isolation between the misalignment block 26 and the lifting hook, no squeezing or pulling occurs at the hook weld during the straightening process, thereby avoiding hook deformation or weld cracking.

[0044] The auxiliary top block 27 and the first abutment block 21 form a combined structure. When the straightening mechanism 2 presses down, the auxiliary top block 27 preferentially contacts the root area of ​​the lifting hook. When the hydraulic cylinder 22 drives the second abutment block 24 to close with the first abutment block 21, the contour of the auxiliary top block 27 forces the root of the hook to remain perpendicular to the straightening platform 1. At the same time, its surface curvature evenly transmits the straightening pressure to both sides of the hook, avoiding plastic deformation caused by single-point force. The position of the auxiliary top block 27 can be adjusted laterally according to the hook size, for example, by fixing it in different mounting hole positions through a slide rail mechanism to adapt to the straightening requirements of different specifications of hangers.

[0045] like Figure 1 and Figure 2As shown, the receiving mechanism includes a receiving plate 3, a receiving block 31, a placement block 32, and a placement groove 33. The receiving plate 3 is laterally slidably connected to the straightening platform 1. The moving mechanism 4 is set on the receiving plate 3, and the receiving block 31 is set on the moving mechanism 4. The receiving block 31 is used to receive the welding plate. The placement block 32 is fixedly connected to the receiving block 31 and is used to abut against the side wall of the welding plate. The placement groove 33 is opened on the placement block 32 and is used to place the lifting hook.

[0046] When the fixture enters the straightening area via the conveyor, the moving mechanism 4 drives the receiving plate 3 to move laterally to the predetermined position. The receiving block 31 moves longitudinally under the action of the sliding block 41, ensuring that the side wall of the placement block 32 precisely abuts against the edge of the welding plate. The lifting hook is embedded in the placement groove 33 to prevent deformation during straightening. The first abutting block 21 and the second abutting block 24 of the straightening mechanism 2 clamp the fixture from the upper and lower sides respectively. The hydraulic cylinder 22 drives the second abutting block 24 to press down, applying force evenly using the arc-shaped contact surface. During segmented straightening, the moving mechanism 4 adjusts the position of the receiving plate 3 segment by segment according to the step distance, ensuring that the entire length of the fixture is straightened. The dual-station design allows for switching the position of the receiving plate 3 to call different curvature straightening modules, adapting to straightening requirements with varying bending radii.

[0047] like Figure 1 , Figure 3 and Figure 4 As shown, the moving mechanism 4 includes a sliding block 41, a moving cylinder 42, and an adjusting cylinder 43. The sliding block 41 is slidably connected to the receiving plate 3, and the sliding block 41 and the receiving block 31 are slidably connected. The receiving block 31 can slide longitudinally on the sliding block 41. The moving cylinder 42 is fixedly connected to the receiving plate 3, and the output shaft of the moving cylinder 42 is fixedly connected to the sliding block 41. The adjusting cylinder 43 is fixedly connected to the sliding block 41 and is used to drive the receiving block 31 to move vertically.

[0048] The movable cylinder 42 pushes the sliding block 41 to move laterally along the receiving plate 3 via its output shaft, thereby driving the receiving block 31 fixed to the sliding block 41 to complete lateral positioning. When it is necessary to adjust the height of the receiving block 31, the piston rod of the adjusting cylinder 43 extends or retracts, driving the receiving block 31 to rise and fall vertically along the longitudinal slide rail on the sliding block 41. This linkage mechanism achieves coarse lateral positioning through the movable cylinder 42 and completes fine vertical adjustment in conjunction with the adjusting cylinder 43, ensuring that the welding plate is accurately placed in the set position before straightening.

[0049] like Figure 3 and Figure 5As shown, a receiving rod 5 is rotatably connected to the receiving plate 3, and a rotating shaft 51 is rotatably connected to the receiving rod 5. The rotating shaft 51 is snapped onto the straightening platform 1. A rotating motor 6 is fixedly connected to the receiving plate 3, and a rotating gear 61 is fixedly connected to the output shaft of the rotating motor 6. A movable rack 62 is fixedly connected to the straightening platform 1. The movable rack 62 meshes with the rotating gear 61 and can move the receiving plate 3 under the push of the rotating motor 6.

[0050] When the rotating motor 6 starts, the output shaft drives the rotating gear 61 to rotate. Since the rotating gear 61 meshes with the moving rack 62 fixed on the straightening platform 1, the reaction force generated by the gear rolling along the rack pushes the receiving plate 3 to move along the transverse slide rail of the straightening platform 1. By controlling the direction and speed of the motor, the displacement distance and direction of the receiving plate 3 can be precisely adjusted, thereby realizing the step-by-step conveying of the fixture during the straightening process. This structure avoids the operational errors of manual position adjustment and can be linked with a multi-station straightening device, automatically switching the straightening mode after moving to the preset position.

[0051] In use, when the rotating motor 6 is started, the output shaft drives the rotating gear 61 to rotate. Since the rotating gear 61 meshes with the moving rack 62 fixed on the straightening platform 1, the reaction force generated by the gear rolling along the rack pushes the receiving plate 3 to move along the transverse slide rail of the straightening platform 1. By controlling the direction and speed of the motor, the displacement distance and direction of the receiving plate 3 can be precisely adjusted, thereby realizing the step-by-step conveying of the fixture during the straightening process.

[0052] The receiving block 31 moves longitudinally under the action of the sliding block 41, ensuring that the side wall of the placement block 32 precisely abuts against the edge of the welding plate. The lifting hook is embedded in the placement groove 33 to prevent deformation of the hook during the straightening process. The first abutting block 21 and the second abutting block 24 of the straightening mechanism 2 clamp the hanger from the upper and lower sides respectively. The hydraulic cylinder 22 drives the second abutting block 24 to press down, applying force evenly using the arc contact surface. During the segmented straightening process, the moving mechanism 4 adjusts the position of the receiving plate 3 segment by segment according to the step distance to ensure that the entire length of the hanger is straightened. The dual-station design switches the position of the receiving plate 3 to call up different curvature straightening modules to adapt to the straightening requirements of large and small bending radii.

[0053] The movable cylinder 42 pushes the sliding block 41 to move laterally along the receiving plate 3 via its output shaft, thereby driving the receiving block 31 fixed to the sliding block 41 to complete lateral positioning. When it is necessary to adjust the height of the receiving block 31, the piston rod of the adjusting cylinder 43 extends or retracts, driving the receiving block 31 to rise and fall vertically along the longitudinal slide rail on the sliding block 41. This linkage mechanism achieves coarse lateral positioning through the movable cylinder 42 and completes fine vertical adjustment in conjunction with the adjusting cylinder 43, ensuring that the welding plate is accurately placed in the set position before straightening.

[0054] When the welding plate is placed on the receiving block 31, the lifting hook is embedded in the corresponding groove or gap of the misalignment block 26. After the straightening mechanism 2 is activated, the second abutment block 24 moves towards the first abutment block 21 under hydraulic drive. At this time, the misaligned arrangement of the misalignment block 26 and the lifting hook allows the straightening force to be evenly transmitted to the main body area of ​​the welding plate through the second abutment block 24. Due to the physical isolation between the misalignment block 26 and the lifting hook, no squeezing or pulling occurs at the hook weld during the straightening process, thereby avoiding hook deformation or weld cracking.

[0055] The auxiliary top block 27 and the first abutment block 21 form a combined structure. When the straightening mechanism 2 presses down, the auxiliary top block 27 preferentially contacts the root area of ​​the lifting hook. When the hydraulic cylinder 22 drives the second abutment block 24 to close with the first abutment block 21, the contour of the auxiliary top block 27 forces the root of the hook to remain perpendicular to the straightening platform 1. At the same time, its surface curvature evenly transmits the straightening pressure to both sides of the hook, avoiding plastic deformation caused by single-point force. The position of the auxiliary top block 27 can be adjusted laterally according to the hook size, for example, by fixing it in different mounting hole positions through a slide rail mechanism to adapt to the straightening requirements of different specifications of hangers.

[0056] In this embodiment, the solution replaces manual operation with automated conveying and positioning, eliminating human positioning errors. The combination of the horizontally adjustable receiving plate 3 and the longitudinally sliding receiving block 31 enables precise alignment of the hanger at multiple positions in the straightening station. The coordinated design of the placement groove 33 and the placement block 32 ensures stable lateral positioning while preventing hook avoidance, thus avoiding workpiece displacement during the straightening process. The dual-station straightening mode replaces manual adjustment with mechanical structure switching, improving adaptability to different bending shapes.

[0057] In this embodiment, the traditional three-point hydraulic straightening device achieves bending correction by applying pressure at only one point, which is prone to secondary bending in the opposite direction due to misalignment between the point of force application and the bending point. This solution adopts a structure with two abutment blocks working together. The first abutment block 21 provides a stable support surface, while the second abutment block 24 forms a surface contact pressure with the assistance of the sliding connection structure, so that the straightening force can be evenly distributed on the surface of the welded plate, effectively avoiding material damage caused by local overload. At the same time, the sliding connection structure gives the second abutment block 24 an adaptive adjustment capability, which can adapt to the straightening requirements of different bending curvatures.

[0058] In this embodiment, the traditional three-point hydraulic straightening device uses planar or angular pressure blocks, which apply force only through discrete contact points during straightening, resulting in excessive pressure on local areas of the welded plate. In contrast, the arc-shaped contact block of this application transforms single-point force application into area-wide force application through continuous curved surface contact, effectively dispersing the straightening pressure and avoiding secondary bending or material damage caused by local stress concentration.

[0059] The implementation principle of a straightening machine for hangers in this embodiment is as follows: When the rotary motor 6 starts running, its output shaft drives the rotary gear 61 to rotate together. Since the rotary gear 61 and the moving rack 62 fixed on the straightening platform 1 are in a meshing state, the reaction force generated when the gear rolls along the rack will push the receiving plate 3 to move along the transverse slide rail of the straightening platform 1. By precisely controlling the direction and speed of the rotary motor 6, the displacement distance and moving direction of the receiving plate 3 can be precisely adjusted, thereby achieving a step-by-step conveying operation of the hanger during the straightening process.

[0060] The receiving block 31 moves longitudinally under the drive of the sliding block 41, allowing the side wall of the placement block 32 to precisely abut against the edge of the welding plate. At this time, the lifting hook is embedded inside the placement groove 33; this design effectively prevents the hook from deforming due to force during the straightening process. The first abutting block 21 and the second abutting block 24 of the straightening mechanism 2 clamp the hanger from the upper and lower sides respectively. Then, the hydraulic cylinder 22 drives the second abutting block 24 to press downwards, applying force evenly to the hanger using the arc-shaped contact surface. During the segmented straightening process, the moving mechanism 4 adjusts the position of the receiving plate 3 segment by segment according to the set step distance to ensure that the entire length of the hanger is fully straightened. The dual-station design allows switching the position of the receiving plate 3 to call up straightening modules with different curvatures, thus adapting to straightening requirements with different bending radii.

[0061] The movable cylinder 42 pushes the sliding block 41 to move laterally along the receiving plate 3 via its output shaft, thereby driving the receiving block 31 fixed on the sliding block 41 to complete the lateral positioning. When the height of the receiving block 31 needs to be adjusted, the piston rod of the adjusting cylinder 43 will extend or retract accordingly, driving the receiving block 31 to rise and fall vertically along the longitudinal slide rail on the sliding block 41. This linkage mechanism first completes the coarse lateral positioning through the movable cylinder 42, and then performs fine vertical adjustment in conjunction with the adjusting cylinder 43, ultimately ensuring that the welding plate can be accurately placed on the set station before entering the straightening process.

[0062] After the welding plate is placed on the receiving block 31, the lifting hook will embed into the groove or gap corresponding to the misalignment block 26. After the straightening mechanism 2 is activated, the second abutment block 24 moves towards the first abutment block 21 under the drive of the hydraulic device. At this time, the misaligned layout design of the misalignment block 26 and the lifting hook allows the straightening force to be evenly transmitted to the main body area of ​​the welding plate through the second abutment block 24. At the same time, since there is a physical isolation between the misalignment block 26 and the lifting hook, no squeezing or pulling force will be generated at the weld of the hook during the entire straightening process, thereby effectively avoiding the problem of hook deformation or weld cracking.

[0063] The auxiliary top block 27 and the first abutment block 21 together form a combined structure. When the straightening mechanism 2 presses downward, the auxiliary top block 27 will preferentially contact the root area of ​​the lifting hook. When the hydraulic cylinder 22 drives the second abutment block 24 to close with the first abutment block 21, the contour of the auxiliary top block 27 will force the root of the hook to remain perpendicular to the straightening platform 1. At the same time, the curvature of its surface can evenly transmit the straightening pressure to both sides of the hook, avoiding plastic deformation of the hook due to single-point force. In addition, the position of the auxiliary top block 27 can be adjusted laterally according to the size of the hook, for example, by fixing it in different mounting holes through a slide rail mechanism, so as to adapt to the straightening requirements of different specifications of hangers.

[0064] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A straightening machine for hangers, comprising a straightening platform and a straightening mechanism arranged on the straightening platform, characterized in that: a receiving plate is transversely and slidably connected to the straightening platform, a moving mechanism is arranged on the receiving plate, a receiving block is arranged on the moving mechanism, the receiving block is used for receiving the welding plate, a placing block is fixedly connected to the receiving block, the placing block is used for abutting against the side wall of the welding plate, a placing groove is formed in the placing block, and the placing groove is used for placing the lifting hook; the straightening mechanism comprises a first abutting block fixedly connected to the straightening platform, a hydraulic cylinder is fixedly connected to the straightening platform, a connecting block is fixedly connected to the output shaft of the hydraulic cylinder, a second abutting block is slidably connected to the connecting block, the second abutting block is arranged above the first abutting block, and the first abutting block and the second abutting block are used for straightening the welding plate; an active cylinder is fixedly connected to the connecting block, and the output shaft of the active cylinder is fixedly connected to the second abutting block; the contact surfaces of the first abutting block and the second abutting block are both arranged in a circular arc shape, the second abutting block has a sliding degree of freedom relative to the output shaft of the hydraulic cylinder, and the contact angle can be automatically adjusted according to the actual bending shape of the welding plate during the pressing process; a misaligned block is fixedly connected to the second abutting block, the position of the misaligned block is misaligned with the position of the lifting hook, and the lifting hook is embedded in the groove or gap corresponding to the misaligned block; an auxiliary top block is fixedly connected to the first abutting block, the auxiliary top block preferentially contacts the root area of the lifting hook when the straightening mechanism is pressed down, the profile of the auxiliary top block forces the hook root to maintain a vertical state with the straightening platform, and the surface arc of the auxiliary top block uniformly transmits the straightening pressure to both sides of the hook.

2. The straightener for a hanger according to claim 1, characterized by: The moving mechanism comprises a sliding block slidably connected to the receiving plate, the sliding block and the receiving block are slidably connected, and the receiving block can slide longitudinally on the sliding block.

3. The straightener for a hanger according to claim 2, characterized by: The moving mechanism further comprises a moving cylinder fixedly connected to the receiving plate, the output shaft of the moving cylinder is fixedly connected to the sliding block, an adjusting cylinder is fixedly connected to the sliding block, and the adjusting cylinder is used for driving the receiving block to move in the vertical direction.

4. The straightener for a hanger according to claim 1, characterized by: A receiving rotating rod is rotatably connected to the receiving plate, a rotating shaft is rotatably connected to the receiving rotating rod, and the rotating shaft is clamped on the straightening platform.

5. The straightener for a hanger according to claim 1, characterized by: A rotating motor is fixedly connected to the receiving plate, a rotating gear is fixedly connected to the output shaft of the rotating motor, a moving rack is fixedly connected to the straightening platform, the moving rack and the rotating gear are engaged, and the receiving plate can be moved under the pushing of the rotating motor.

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