Bending module and trunk frame bending machine thereof

Abstract

The invention relates to the technical field of bending equipment, in particular to a bending module and a trunk frame bending machine thereof. The invention provides an innovative solution aiming at the problems of low bending precision, poor adaptability and the like of plastic profiles in the prior art. The bending module comprises a first clamping part, a bending forming part, a first driving device and a heating device, and is characterized in that a first fine adjustment device, a second fine adjustment device and a third fine adjustment device are additionally arranged and used for adjusting the overall height of the module, the vertical position of the clamping part and the vertical position of the bending forming part respectively. Through cooperative work of the multi-stage fine adjustment mechanism, it is guaranteed that the upper end faces of the guide wheels are horizontal and consistent, alignment of heating cavities is accurate, and the bending precision and angle deviation control are effectively improved. And meanwhile, the equipment adopts a linkage design of four bending modules, so that multi-station parallel processing is realized, the production efficiency is improved, the remodeling time is shortened, the structure is simple, the maintenance is convenient and fast, and the equipment is suitable for large-scale production of luggage case frames.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bending equipment, in particular to a bending module and a suitcase frame bending machine. BACKGROUND

[0002] In the field of bending equipment, especially for plastic profile processing equipment, there are many technical problems in the prior art that need to be solved. Traditional bending equipment is mainly designed for metal materials, and when it is applied to plastic profile processing, it often shows obvious limitations.

[0003] The existing bending equipment generally lacks effective fine-tuning mechanisms, which makes it difficult to achieve accurate positioning and adjustment in actual production processes. When different specifications of plastic profiles need to be processed, operators often need to replace the mold or make complex mechanical adjustments to adapt to production needs. This process not only takes time and effort, but also makes it difficult to ensure the accuracy of the adjustment. Especially in the bending process of suitcase frames, due to the diversity of frame size and shape, this adjustment inconvenience problem is particularly prominent.

[0004] In terms of bending precision control, the existing equipment also has obvious defects. Due to the lack of reliable positioning and guiding systems, plastic profiles are prone to deviation or deformation during the bending process, making it difficult to ensure the consistency of the bending angle and shape. This problem is particularly evident in the processing of suitcase frames that require multiple bending points, as the positional accuracy and angular consistency between multiple bending points often fail to meet ideal conditions. SUMMARY

[0005] To solve the above problems, the present application provides a bending module and a suitcase frame bending machine, which is expected to reduce the production cost of suitcase frames, improve production efficiency, and promote the technological progress and industrial upgrading of the suitcase manufacturing industry.

[0006] To achieve the above purpose, the technical solution adopted by the present application is: A bending module, comprising a first clamping part for clamping a plastic profile; a bending forming part having a heating cavity inside; a first driving device drivingly connected to the bending forming part and driving the bending forming part to rotate; a heating device connected to the bending forming part and conveying heated gas to the heating cavity formed after the bending forming part is pressed together, to heat the plastic profile in the heating cavity; further comprising a first fine-tuning device, a second fine-tuning device and a third fine-tuning device, the first fine-tuning device is used to adjust the height of the bending module in the vertical direction, the second fine-tuning device is connected with the first clamping part and is used to adjust the position of the first clamping part in the vertical direction, and the third fine-tuning device is connected with the bending forming part and is used to adjust the position of the bending forming part in the vertical direction.

[0007] Further, the first fine adjustment device, the second fine adjustment device and the third fine adjustment device each comprise at least one of a screw mechanism, a cylinder mechanism or a servo drive mechanism.

[0008] Further, the first clamping part comprises a first fixed plate, a first clamping cylinder, a first clamping bottom plate and a first clamping moving plate, the second fine adjustment device is fitted with the first fixed plate, the movable end of the second fine adjustment device is fitted with the first clamping cylinder and the first clamping bottom plate, the first clamping cylinder drives the first clamping moving plate to move towards the first clamping bottom plate, so that the plastic profile is clamped between the first clamping moving plate and the first clamping bottom plate.

[0009] Further, the movable end of the second fine adjustment device is provided with a horizontal waist hole, the first clamping bottom plate is slidably fitted on the first fixed plate through the waist hole and is fixed by bolts, so that the relative position between the first clamping bottom plate and the first fixed plate is adjustable in the horizontal direction; and the first clamping moving plate is linked with the first clamping bottom plate through a guide rod and a spring, so as to move synchronously with the horizontal adjustment of the first clamping bottom plate.

[0010] Further, the bending forming part comprises a second fixed plate, a second clamping cylinder, a first clamping bottom shell and a first clamping surface shell, the first driving device is connected with the second fixed plate, and the third fine adjustment device is fitted with the second fixed plate; the second clamping cylinder and the first clamping bottom shell are fixed on the movable end of the third fine adjustment device, the movable end of the second clamping cylinder pushes the first clamping surface shell to move towards the first clamping bottom shell, so that the plastic profile is wrapped between the first clamping surface shell and the first clamping bottom shell and surrounds the heating cavity.

[0011] Further, the movable end of the third fine adjustment device is provided with a horizontal sliding rail, the first clamping bottom shell is slidably fitted on the second fixed plate through the sliding rail and is fixed by bolts, so that the relative position between the first clamping bottom shell and the second fixed plate is adjustable in the horizontal direction; and the first clamping surface shell is linked with the first clamping bottom shell through a guide rod and a spring, so as to move synchronously with the horizontal adjustment of the first clamping bottom shell.

[0012] Further, the bending forming part further comprises a plurality of guide wheels arranged on one side of the heating cavity surrounded by the first clamping surface shell and the first clamping bottom shell; the guide groove on the surface of the guide wheel is aligned with the plastic profile placing groove in the heating cavity.

[0013] A luggage frame bending machine comprises a first adjusting device, a second adjusting device, a third adjusting device and four bending modules, wherein the four bending modules comprise a first bending module, a second bending module, a third bending module and a fourth bending module, The first adjusting device comprises two adjusting movable ends moving towards or away from each other, and the two adjusting movable ends of the first adjusting device are fixedly connected with the first fine adjusting device of the first bending module and the second bending module respectively, and the first bending module and the second bending module move towards or away from each other, The second adjusting device and the third adjusting device comprise one adjusting movable end, one end of the second adjusting device is matched with the second fixed plate of the first bending module, and the adjusting movable end of the second adjusting device is connected with the first fine adjusting device of the third bending module; one end of the third adjusting device is matched with the second fixed plate of the second bending module and the first fine adjusting device of the fourth bending module.

[0014] Further, the first adjusting device, the second adjusting device and the third adjusting device have the same structure, wherein the first adjusting device comprises a first adjusting motor, a bidirectional screw rod and sliding nuts movably sleeved on both ends of the bidirectional screw rod, the first adjusting motor drives the bidirectional screw rod to rotate and makes the two sliding nuts move towards or away from each other along the direction of the bidirectional screw rod, and the two sliding nuts constitute the adjusting movable end.

[0015] Further, the second adjusting device and the third adjusting device comprise a second adjusting motor, a unidirectional screw rod and a sliding nut movably sleeved on the unidirectional screw rod, the second adjusting motor drives the unidirectional screw rod to rotate and makes the sliding nut move along the direction of the unidirectional screw rod, and the sliding nut constitutes the adjusting movable end.

[0016] The beneficial effects of the present application are as follows: 1. Through the cooperation of the three-stage fine adjusting devices, accurate positioning in the bending process is realized. The first fine adjusting device ensures the horizontal consistency of the working surfaces of the plurality of guide wheels, the second fine adjusting device ensures the accurate alignment of the clamping part and the profile, and the third fine adjusting device maintains the optimal relative position of the heating cavity and the guide wheels through the horizontal sliding rail mechanism. This hierarchical adjustment mechanism can control the bending angle deviation within ±0.5°, effectively improving the consistency of product dimensions.

[0017] 2. The four bending modules realize cooperative work through the linkage mechanism, and the first bending module and the second bending module complete the main bending process while driving the third and fourth bending modules to perform auxiliary processing respectively. This multi-station parallel processing mode reduces the process conversion time, shortens the single processing cycle by about 30%, and is particularly suitable for the manufacturing of products such as luggage frames with multiple bending points.

[0018] 3. The mechanical fine adjusting mechanism reduces the operation complexity, and the adjustment process can be completed without special tools. The modular design enables independent maintenance of key components, reducing equipment downtime. At the same time, the simplified structure of the fixed guide wheel reduces the frequency and cost of daily maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 This is a structural diagram of the bending module.

[0020] Figure 2 This is a schematic diagram of the bending module after omitting the first clamping part.

[0021] Figure 3 This is a schematic diagram of the structure of the first clamping part.

[0022] Figure 4 This is a schematic diagram of the bending module from another perspective, omitting the first clamping part.

[0023] Figure 5 This is a top view of a luggage frame bending machine.

[0024] Reference numerals: 11. First clamping part; 111. First clamping cylinder; 112. First clamping moving plate; 113. First fixing plate; 114. First clamping base plate; 115. Guide rod; 12. Bending and forming part; 121. Second fixing plate; 123. First clamping bottom shell; 1231. First clamping secondary bottom shell; 1232. First clamping main bottom shell; 124. First clamping face shell; 1241. First clamping secondary face shell; 1242. First clamping main face shell; 125. Slide rail; 126. Guide wheel; 13. First drive... Drive mechanism; 131, first servo motor; 132, drive fixing plate; 133, worm gear reducer assembly; 134, first power shaft; 21, first adjustment device; 22, second adjustment device; 23, third adjustment device; 101, first bending module; 102, second bending module; 103, third bending module; 104, fourth bending module; 212, first adjustment motor; 211, bidirectional screw; 201, first fine-tuning device; 202, second fine-tuning device; 2021, waist hole; 203, third fine-tuning device. Detailed Implementation

[0025] Please see Figures 1-5 As shown, the present invention relates to a bending module, including a first clamping part 11 for clamping a plastic profile; a bending forming part having a heating cavity inside; a first driving device 13 connected to the bending forming part 12 and driving the bending forming part 12 to rotate; and a heating device connected to the bending forming part 12, which delivers heating gas to the heating cavity formed after the bending forming part 12 is pressed, to heat the plastic profile inside the heating cavity. It also includes a first fine-tuning device 201, a second fine-tuning device 202, and a third fine-tuning device 203. The first fine-tuning device 201 is used to adjust the height of the entire bending module in the vertical direction. The second fine-tuning device 202 is connected to the first clamping part 11 and is used to adjust the position of the first clamping part 11 in the vertical direction. The third fine-tuning device 203 is connected to the bending forming part 12 and is used to adjust the position of the bending forming part 12 in the vertical direction.

[0026] The bending module mainly includes a first clamping part 11, a bending forming part 12, and a first driving device 13. The improvement of this invention lies in the addition of a first fine-tuning device 201, a second fine-tuning device 202, and a third fine-tuning device 203. These devices are precisely adjusted during the equipment debugging phase to ensure stability during operation. The movable end of the first fine-tuning device 201 is mounted on the driving fixing plate 132 (described in detail below). The vertical height adjustment of the entire bending module is achieved through the first fine-tuning device 201 (in this embodiment, a screw and nut mechanism is used). Specifically, rotating the adjusting screw allows the driving fixing plate 132 to rise or fall relative to the base platform, with an adjustment accuracy of ±0.1mm. This design is mainly used to ensure that the upper surfaces of the guide wheels 126 of multiple bending modules are at the same horizontal plane. In actual debugging, when using guide wheels 126 of different diameters, the height of each module is adjusted through the first fine-tuning device 201 to keep the upper surfaces of the guide wheels 126 flush, providing stable support for subsequent material placement.

[0027] The second fine-tuning device 202 works in conjunction with the first clamping part 11, mainly for adjusting the clamping position to adapt to changes in material height. For example... Figure 2 As shown, the second fine-tuning device 202 (in this embodiment, a screw and nut mechanism) can drive the first clamping cylinder 111, the first clamping moving plate 112, and the first clamping base plate 114 to move up and down as a whole, with an adjustment range of ±20mm. This design ensures that when the height of the guide wheel 126 changes, the clamping part can accurately correspond to the material position.

[0028] The third fine-tuning device 203 is integrated in the bending and forming section 12 and is used to independently adjust the vertical position of the heating chamber. This device is implemented through a guide rail slider mechanism set on the second fixed plate 121. Rotating the adjustment handle can drive the first clamping bottom shell 123 and the first clamping surface shell 124 to rise and fall synchronously. This design ensures the optimal relative position between the heating chamber and the material, so that the heating gas can be evenly distributed.

[0029] During actual debugging, the first fine-tuning device 201 is used to adjust the upper surfaces of the guide wheels 126 of the four bending modules to the same horizontal plane. Then, according to the material specifications, the second fine-tuning device 202 is used to adjust the position of the clamping parts of each module so that the clamping points match the height of the material. Finally, the third fine-tuning device 203 is used to fine-tune the position of the heating chamber to ensure that the bending forming part 12 is aligned with the material. After all adjustments are completed, the locking devices are used to fix the fine-tuning mechanisms, and the equipment is ready to enter the working state.

[0030] Furthermore, the first fine-tuning device 201, the second fine-tuning device 202, and the third fine-tuning device 203 each include at least one of a screw mechanism, a cylinder mechanism, or a servo drive mechanism.

[0031] Furthermore, the first clamping part 11 includes a first fixed plate 113, a first clamping cylinder 111, a first clamping base plate 114, and a first clamping moving plate 112. The second fine-tuning device 202 is fitted with the first fixed plate 113. The movable end of the second fine-tuning device 202 is fitted with the first clamping cylinder 111 and the first clamping base plate 114. The movable end of the first clamping cylinder 111 drives the first clamping moving plate 112 to move toward the first clamping base plate 114, so that the plastic profile is clamped between the first clamping moving plate 112 and the first clamping base plate 114.

[0032] The first clamping part 11 includes a first fixed plate 113, a first clamping cylinder 111, a first clamping base plate 114, and a first clamping movable plate 112. A second fine-tuning device 202 is fitted to the first fixed plate 113, and the movable end of the second fine-tuning device 202 is connected to the first clamping cylinder 111 and the first clamping base plate 114. This design allows the second fine-tuning device 202 to adjust the overall position of the clamping part in the vertical direction. Clamping process: When the plastic profile is placed on the first clamping base plate 114, the first clamping cylinder 111 is activated, and its movable end drives the first clamping movable plate 112 to move towards the first clamping base plate 114. Through pneumatic pressure, the first clamping movable plate 112 and the first clamping base plate 114 work together to tightly clamp the plastic profile between them. This process ensures that the profile will not slip or shift during bending.

[0033] The function of the second fine-tuning device 202: The second fine-tuning device 202 is activated during the equipment debugging phase. It adjusts the vertical position of the first clamping part 11 via a screw mechanism or servo drive. For example, when the height of the guide wheel 126 changes due to the replacement of wheels with different diameters, the second fine-tuning device 202 can synchronously adjust the height of the clamping point to ensure that the profile is always aligned with the heating cavity. During operation, the fine-tuning device is locked to ensure stability. This further demonstrates the cooperation between the clamping part and the bending forming part 12. The adjustment of the second fine-tuning device 202 ensures the coordination between the clamping part and the guide wheel 126, avoiding processing errors caused by height mismatch.

[0034] Furthermore, the movable end of the second fine-tuning device 202 is provided with a horizontal waist hole 2021. The first clamping base plate 114 is slidably mounted on the first fixed plate 113 through the waist hole 2021 and fixed with bolts, so that the relative position between the first clamping base plate 114 and the first fixed plate 113 is adjustable in the horizontal direction. The first clamping moving plate 112 is linked with the first clamping base plate 114 through the guide rod 115 and the spring, so as to move synchronously with the horizontal adjustment of the first clamping base plate 114.

[0035] The movable end of the second fine-tuning device 202 has a horizontally oriented slot 2021. The first clamping base plate 114 is slidably connected to the first fixed plate 113 by bolts passing through the slot 2021. The slot 2021 is an elongated oval groove, providing a defined horizontal travel stroke for the bolt. When the clamping position needs to be adjusted to accommodate different specifications of plastic profiles (the clamping position will also change after changing the guide wheels 126 of different diameters), the operator only needs to loosen the bolts to push the entire first clamping base plate 114 to slide along the direction of the slot 2021, achieving continuous and stepless adjustment of the horizontal position. At the same time, after the position is determined, tightening the bolts will use the clamping force generated by the bolt head and nut to firmly press the first clamping base plate 114 onto the first fixed plate 113, effectively preventing positional displacement caused by vibration during subsequent work and ensuring the stability of the processing.

[0036] Furthermore, the first clamping moving plate 112 is connected to the first clamping base plate 114 via at least two guide rods 115. One end of each guide rod 115 is fixed to the first clamping base plate 114, and the other end passes through a light hole on the first clamping moving plate 112. This structure ensures that the first clamping moving plate 112 can only move precisely in a straight line relative to the first clamping base plate 114 along the axial direction of the guide rod 115 (i.e., the clamping direction), effectively preventing deflection or jamming. Moreover, a spring is sleeved on the guide rod 115 and pre-compressed between the first clamping moving plate 112 and the first clamping base plate 114. Its core functions are twofold: first, linkage. When the first clamping base plate 114 moves horizontally, the first clamping moving plate 112 is forced to move synchronously through the connection of the guide rod 115 and the spring, ensuring that the two clamping plates are always aligned and maintaining the parallelism of the clamping surfaces; second, reset. When the first clamping cylinder 111 retracts, the thrust of the cylinder disappears, and the compressed spring quickly releases its elastic potential energy, pushing the first clamping moving plate 112 to reliably retract to the initial open position, preparing for the next working cycle.

[0037] Furthermore, the bending forming part 12 includes a second fixing plate 121, a second clamping cylinder (not shown), a first clamping bottom shell 123, and a first clamping top shell 124. The first driving device 13 is connected to the second fixing plate 121, and the third fine-tuning device 203 is fitted with the second fixing plate 121. The second clamping cylinder and the first clamping bottom shell 123 are fixed on the movable end of the third fine-tuning device 203. The movable end of the second clamping cylinder pushes the first clamping top shell 124 toward the first clamping bottom shell 123, so that the plastic profile is wrapped between the first clamping top shell 124 and the first clamping bottom shell 123, and forms the heating cavity.

[0038] Meanwhile, in other embodiments, such as Figure 1 As shown, a steam hood (not shown) is also provided on the surface of the first clamping shell 124, which communicates with the interior of the first clamping shell 124; multiple vent holes are distributed on the first clamping shell 124. An external heating device, such as a high-temperature steam engine, delivers high-temperature steam to the first clamping shell 124 through the steam hood and outputs the high-temperature steam evenly through the vent holes, thereby efficiently heating the plastic profile in the heating chamber. This design ensures uniform heat distribution and avoids problems such as local overheating or underheating. At the same time, the heating chamber is a specially designed structure with optimized shape and size, which not only facilitates material molding but also, at an appropriate heating temperature (usually controlled near the glass transition temperature of the plastic profile), enables the plastic profile to have a certain degree of plasticity, which is beneficial for reducing internal stress and deformation during bending and improving the accuracy of the finished product.

[0039] like Figure 1 As shown, this part mainly includes key components such as the second fixing plate 121, the second clamping cylinder (not shown), the first clamping base shell 123, and the first clamping face shell 124. In terms of connection, the second fixing plate 121 serves as the basic support structure and is directly connected to the first driving device 13. It is particularly noteworthy that the third fine-tuning device 203 is fitted with the second fixing plate 121, while the second clamping cylinder and the first clamping base shell 123 are fixed to the movable end of the third fine-tuning device 203. This hierarchical connection provides the structural foundation for achieving precise adjustment.

[0040] The bending process can be divided into three key stages: The plastic profile is first placed on the first clamping base shell 123, at which point the first clamping face shell 124 is in the open state. Through precise adjustments by the third fine-tuning device 203 during the debugging phase, the heating cavity and the profile are ensured to be in the optimal relative position.

[0041] After the second clamping cylinder is activated, its movable end pushes the first clamping face shell 124 to move towards the first clamping bottom shell 123. For example... Figure 2As shown, when the two are closed, they form a complete heating cavity that encloses the plastic profile. It should be noted that the design here is "enclosed" rather than "clamped" to prevent the profile from breaking due to rigid clamping during subsequent bending.

[0042] The heating device delivers high-temperature gas into the heating chamber to uniformly heat the plastic profile. Once the profile reaches a suitable temperature, the first drive device 13 rotates the entire bending and forming section 12 to complete the bending process. Figure 3 As shown, the guide wheel 126 plays an important guiding and supporting role in this process.

[0043] Furthermore, the innovative application of the third fine-tuning device 203 in this structure demonstrates a high degree of system integration and functional synergy. Through its precision adjustment mechanism at its movable end, this device first achieves precise fine-tuning of the heating cavity in the vertical direction. This fundamental adjustment function lays a crucial foundation for subsequent collaborative operations. On this basis, the true value of this device lies in its ability to ensure that the heating cavities distributed across multiple bending modules maintain the same horizontal height, thereby achieving precise coordination among multiple processing stations and effectively avoiding uneven heating or bending angle errors caused by height deviations. Particularly important is that this precise vertical adjustment capability endows the equipment with strong adaptability, enabling it to flexibly respond to the replacement requirements of guide wheels 126 of different diameters. When guide wheels 126 need to be replaced due to process requirements, the relative positional relationship between components can be quickly restored simply by compensating the height of the heating cavity through the third fine-tuning device 203, ensuring the equipment's rapid adaptability and stable processing accuracy when switching between different production batches.

[0044] Furthermore, the first clamping base shell 123 includes a first clamping main base shell 1232 and a first clamping secondary base shell 1231. The first clamping secondary base shell 1231 is fixedly mounted on the movable end of the third fine-tuning device 203, and the first clamping secondary base shell 1231 is provided with a horizontal slide rail 125. The first clamping main base shell 1232 is slidably mounted on the slide rail 125 and fixed with bolts. Moreover, the first clamping face shell 124 includes a first clamping main face shell 1242 and a first clamping secondary face shell 1241. The first clamping secondary face shell 1241 is provided with a horizontal slide rail 125. The first clamping main face shell 1242 is slidably mounted on the slide rail 125 and fixed with bolts. The first clamping secondary face shell 1241 is linked with the first clamping secondary base shell 1231 through a guide rod 115 and a spring, so as to move synchronously with the horizontal adjustment of the first clamping secondary base shell 1231.

[0045] This design features a refined approach to the components of the heating cavity, optimizing the traditional monolithic shell structure into a modular assembly. The first clamping bottom shell 123 is divided into a first clamping main bottom shell 1232 and a first clamping secondary bottom shell 1231. Similarly, the first clamping front shell 124 is also divided into a first clamping main front shell 1242 and a first clamping secondary front shell 1241. In terms of connection, the first clamping secondary bottom shell 1231 is fixedly mounted at the movable end of the third fine-tuning device 203, forming the base of the entire heating cavity assembly. The first clamping secondary bottom shell 1231 is equipped with a horizontal slide rail 125, through which the first clamping main bottom shell 1232 is slidably mounted and ultimately fixed with bolts. The same structural principle is applied to the front shell: the first clamping secondary front shell 1241 is equipped with a horizontal slide rail 125, through which the first clamping main front shell 1242 is slidably mounted and fixed with bolts. The core innovation of this solution lies in the linkage design between the main and auxiliary shells. The first clamping auxiliary shell 1241 forms a linkage mechanism with the first clamping auxiliary bottom shell 1231 through the guide rod 115 and the spring. When the first clamping auxiliary bottom shell 1231 is adjusted in the horizontal direction, the first clamping auxiliary shell 1241 can move synchronously, ensuring that the two always maintain the correct relative position. The specific working process is as follows: When it is necessary to adjust the horizontal position of the heating cavity, first loosen the fixing bolts of the first clamping main bottom shell 1232 and the first clamping main shell 1242, and then manually drive the first clamping auxiliary bottom shell 1231 to move in the horizontal direction. Since the first clamping auxiliary shell 1241 is connected to the first clamping auxiliary bottom shell 1231 through the guide rod 115, and the spring provides the necessary preload, the first clamping auxiliary shell 1241 will move synchronously with the first clamping auxiliary bottom shell 1231. After adjusting to the predetermined position, tighten the fixing bolts of the first clamping main bottom shell 1232 and the first clamping main surface shell 1242 respectively to complete the entire adjustment process.

[0046] Furthermore, the bending and forming part 12 also includes a plurality of guide wheels 126, which are disposed on one side of the heating cavity formed by the first clamping face shell 124 and the first clamping bottom shell 123; the guide grooves on the surface of the guide wheels 126 are aligned with the plastic profile placement slots inside the heating cavity. In this specific embodiment, the guide wheels 126 are directly and movably sleeved on the first power shaft 134, and the two are concentrically arranged.

[0047] Each guide wheel 126 has a guide groove of a specific shape machined on its surface. The shape and size of these guide grooves are precisely designed to ensure accurate alignment with the placement slots of the plastic profiles inside the heating chamber. This alignment is crucial for ensuring processing accuracy. When multiple plastic profiles are placed in their corresponding slots within the heating chamber, the guide wheel 126 on one side supports and constrains the profiles from the side through its guide grooves, effectively preventing lateral shifting or twisting deformation that may occur during heating and bending. During operation, the guide wheel 126 plays multiple important roles. First, during the profile feeding stage, the guide wheel 126 acts as a centering guide, ensuring that the profiles can smoothly and accurately enter the predetermined slots within the heating chamber, laying the foundation for subsequent processing. Second, during the heating stage, the profiles may undergo slight deformation due to heat; the presence of the guide wheel 126 maintains their positional stability, preventing misalignment caused by deformation.

[0048] In this specific embodiment, a luggage frame bending machine is also provided, including a first adjusting device 21, a second adjusting device 22, a third adjusting device 23, and four bending modules. The four bending modules include a first bending module 101, a second bending module 102, a third bending module 103, and a fourth bending module 104. The first adjusting device 21, the second adjusting device 22, and the third adjusting device 23 each include two adjustable movable ends that are close to or far from each other. The two adjustable movable ends are respectively fixedly connected to the first fine-tuning devices 201 of the first bending module 101 and the second bending module 102, so that the first bending module 101 and the second bending module 102 are close to or far from each other. The two adjustable movable ends of the second adjusting device 22 are respectively connected to the first fine-tuning devices 201 of the first bending module 101 and the first fine-tuning devices 201 of the third bending module 103. The two adjustable movable ends of the third adjusting device 23 are respectively connected to the first fine-tuning devices 201 of the second bending module 102 and the first fine-tuning devices 201 of the fourth bending module 104.

[0049] Furthermore, the first driving device 13 includes a first servo motor 131, a worm gear reducer assembly 133, a first power shaft 134, and a drive fixing plate 132. The first servo motor 131 is fixed on the drive fixing plate 132, and the output shaft of the first servo motor 131 is drivenly connected to the worm gear reducer assembly 133. The worm gear reducer assembly 133 is connected to the first power shaft 134, and the first power shaft 134 is drivenly connected to the second fixing plate 121, thereby driving the second fixing plate 121 to rotate. At the same time, the first fixing plate 113 is fixedly connected through the first servo motor 131 (which can be understood as the first clamping part 11 not being driven to rotate by the first power shaft 134).

[0050] Furthermore, the first adjustment device 21 includes a first adjustment motor 212, a bidirectional screw 211, and sliding nuts movably sleeved at both ends of the bidirectional screw 211. When the first adjustment motor 212 drives the bidirectional screw 211 to rotate, since the screw threads are in opposite directions, the two sliding nuts synchronously move closer or further apart along the screw axis, forming the adjustment movable ends. These movable ends are respectively fixedly connected to the first fine-tuning device 201 of the first bending module 101 and the second bending module 102, thereby quickly adjusting the horizontal distance between the two modules. For example, when processing a wider luggage frame, forward rotation of the motor moves the sliding nuts further apart, increasing the module spacing; reverse rotation reduces the spacing. This bidirectional adjustment mechanism ensures symmetry, avoids frame distortion that may be caused by unilateral adjustment, and the adjustment accuracy can reach ±0.1mm.

[0051] The second adjusting device 22 and the third adjusting device 23 have the same structure, including a second adjusting motor, a one-way screw, and a sliding nut movably sleeved on the one-way screw. The second adjusting motor drives the one-way screw to rotate, causing the sliding nut to move unidirectionally along the screw direction, forming the adjusting movable end. In specific applications, one end of the second adjusting device 22 is mounted on the second fixed plate 121 of the first bending module 101, and its movable end is connected to the first fine-tuning device 201 of the third bending module 103; one end of the third adjusting device 23 is mounted on the second fixed plate 121 of the second bending module 102, and its movable end is connected to the first fine-tuning device 201 of the fourth bending module 104. This unidirectional drive method is suitable for asymmetrical adjustment, such as when processing long frames, where the straightness error of the frame can be compensated by fine-tuning the positions of the third and fourth modules. The one-way screw structure is simple and low in cost, yet still ensures the accuracy of displacement. In terms of working principle, during the debugging phase, all adjusting devices control the displacement of the sliding nut through the motor, driving the bending module to move. During operation, the adjusting devices remain locked to ensure stability. This design makes adjusting the module position more intuitive and efficient.

[0052] The luggage frame bending machine of this invention achieves efficient bending of plastic profiles through the precise coordination of four bending modules and a three-stage adjustment device. The first bending module 101 and the second bending module 102 serve as the main processing units, undertaking the core bending task, while the third bending module 103 and the fourth bending module 104 participate in the bending process through a linkage mechanism, jointly completing the processing of the four bending positions of the luggage frame. This design not only improves processing accuracy but also enhances the adaptability of the equipment.

[0053] Specifically, the bending machine's working mechanism is based on the mechanical linkage and independent drive between modules. The first bending module 101, while performing its own bending action, is connected to the third bending module 103 via the second adjusting device 22. When the first drive device 13 of the first bending module 101 is activated, driving its bending forming part 12 to rotate for bending, the second adjusting device 22 transmits the motion to the third bending module 103, adjusting its overall position accordingly. Subsequently, the first drive device 13 of the third bending module 103 operates independently, driving its bending forming part 12 to rotate, completing the processing of the second bending point. Similarly, the second bending module 102 is linked to the fourth bending module 104 via the third adjusting device 23: when the second bending module 102 bends, it drives the fourth bending module 104 to adjust its position, after which the fourth bending module 104 bends independently. This hierarchical linkage mechanism ensures precise control and synchronization of the four bending positions. The four bending modules are integrated into a single unit via a three-stage adjustment mechanism. The second bending module 102 and the third bending module 103 serve as the main processing units, undertaking the core bending task, while the first and fourth bending modules 104 play a supporting role in positioning and forming. When processing large frames, the second adjustment device 22 and the third adjustment device 23 can independently fine-tune the positions of the third and fourth modules to ensure the straightness and flatness of the long frame.

[0054] It is also important to note that the core function of the first fine-tuning device 201 is to adjust the vertical height of the entire bending module. Its importance lies in ensuring that the upper surfaces of the guide wheels 126 of the multiple bending modules distributed on the equipment are strictly on the same horizontal plane. Working principle: This device is typically integrated into the bottom of the drive fixing plate 132, and uses a screw mechanism or servo drive to raise and lower the entire bending module. During debugging, the operator uses the first fine-tuning device 201 to independently adjust each bending module.

[0055] The key problem addressed is that in bending the luggage frame, different bending points may require guide wheels 126 of varying diameters to accommodate different bending radii. Because the guide wheels 126 have different diameters, their top heights will inevitably differ. The first fine-tuning device 201 compensates for this height difference, ensuring that the top surfaces of all guide wheels 126 are flush. This guarantees that the long, rectangular plastic profile being bent can be stably supported on all guide wheels 126 during initial placement, laying the foundation for subsequent precise bending. Without this device, the profile would twist or experience stress due to inconsistent support point heights, leading to inaccurate bending angles, frame deformation, and other defects.

[0056] Second fine-tuning device 202: Adjustment of the position of the clamping part to adapt to the material height.

[0057] The core function of the second fine-tuning device 202 is to adjust the vertical position of the first clamping part 11. Its purpose is to ensure that the height of the clamping point is precisely matched with the position of the profile after the height of the guide wheel 126 is determined.

[0058] Working principle: This device is fitted with the first fixed plate 113, and its movable end is connected to the first clamping cylinder 111 and the first clamping base plate 114. By rotating the adjustment mechanism (such as a screw), the entire clamping part (including the clamping cylinder, the base plate and the moving plate) can be moved up and down relative to the first fixed plate 113.

[0059] The key problem addressed is that after the first fine-tuning device 201 adjusts the overall height of the module (i.e., the height of the guide wheel 126), the original clamping point may no longer be aligned with the center of the profile or the optimal clamping position. The second fine-tuning device 202 allows for independent adjustment of the height of the clamping part, ensuring that the clamping action can be applied accurately and stably to the profile, providing a uniform clamping force. This avoids problems such as profile damage, unstable clamping, or profile slippage during bending caused by misalignment of the clamping point, and is a crucial step in achieving highly reliable clamping.

[0060] Third fine-tuning device 203: Ensures precise alignment between the heating cavity and the guide wheel 126.

[0061] The core function of the third fine-tuning device 203 is to adjust the position of the bending and forming part 12 in the vertical and horizontal directions. Its ultimate goal is to ensure that the heating cavity and the guide wheel 126 are in the optimal relative position.

[0062] Vertical adjustment: used to fine-tune the height of the heating cavity so that its center line coincides with the center line of the profile after adjustment by the first and second fine-tuning devices 202, ensuring uniform heating.

[0063] Horizontal adjustment: The horizontal position of the first clamping base shell 123 (and the entire heating chamber) relative to the second fixed plate 121 is adjusted via the horizontal slide rail 125 at its movable end. This adjustment is mainly to accommodate guide wheels 126 of different diameters. When replacing with a larger diameter guide wheel 126, the wheel body is "larger," requiring the heating chamber to be adjusted backward to maintain the correct contact between the profile and the guide wheel 126 before entering the heating chamber; conversely, when replacing with a smaller diameter guide wheel 126, it needs to be adjusted forward. This precise alignment ensures that the movement trajectory of the profile is always accurately controllable during heating and bending.

[0064] In this embodiment, the first adjusting device, which was vertically placed in the previous design, is now placed horizontally. The most direct benefit is a significant improvement in its stress distribution. When placed vertically, the device and its connecting components may primarily bear lateral bending moments or forces, easily leading to stress concentration and accelerating structural fatigue. By placing it horizontally (usually horizontally), the device's center of gravity and load are more evenly distributed to the supporting foundation or adjacent structure. The direction of force is more consistent with the device's main load-bearing direction, effectively reducing stress peaks at key connection points or support points, thereby alleviating its load-bearing burden and extending its service life.

[0065] Laying the system flat helps lower the center of gravity of the entire system or related components. This makes the system more stable when subjected to external disturbances (such as vibration, shock, or load fluctuations), and enhances its resistance to interference. At the same time, this orientation adjustment also helps reduce the tendency of the device to sway due to its own height or cantilever effect, making the operation smoother and more reliable.

[0066] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A bending module, Includes a first clamping part for clamping plastic profiles; The bending and forming section has a heating cavity inside; The first driving device is connected to the bending and forming part and drives the bending and forming part to rotate. A heating device is connected to the bending and forming part, and delivers heating gas to the heating cavity formed after the bending and forming part is pressed, so as to heat the plastic profile inside the heating cavity; It also includes a first fine-tuning device, a second fine-tuning device, and a third fine-tuning device. The first fine-tuning device is used to adjust the height of the bending module in the vertical direction. The second fine-tuning device is connected to the first clamping part and is used to adjust the position of the first clamping part in the vertical direction. The third fine-tuning device is connected to the bending forming part and is used to adjust the position of the bending forming part in the vertical direction.

2. A bending module according to claim 1, characterized in that: The first clamping part includes a first fixed plate, a first clamping cylinder, a first clamping base plate, and a first clamping movable plate. The second fine-tuning device is fitted with the first fixed plate. The movable end of the second fine-tuning device is fitted with the first clamping cylinder and the first clamping base plate. The movable end of the first clamping cylinder drives the first clamping movable plate to move toward the first clamping base plate, so that the plastic profile is clamped between the first clamping movable plate and the first clamping base plate.

3. A bending module according to claim 2, characterized in that: The bending forming part includes a second fixed plate, a second clamping cylinder, and a first clamping bottom shell. The second clamping cylinder is fixed to the second fixed plate, and the first clamping bottom shell is fixed to the second fixed plate. The movable end of the second clamping cylinder is connected to the first clamping face shell and drives the first clamping face shell to move towards the first clamping bottom shell, so that the plastic profile is clamped between the first clamping face shell and the first clamping bottom shell, and the first clamping face shell and the first clamping bottom shell form a heating cavity. At the same time, the output end of the first driving device is drivenly connected to the second fixed plate.

4. A bending module according to claim 3, characterized in that: The movable end of the second fine-tuning device is provided with a horizontal waist hole. The first clamping base plate is slidably mounted on the first fixed plate through the waist hole and fixed by bolts, so that the relative position between the first clamping base plate and the first fixed plate is adjustable in the horizontal direction. The first clamping moving plate is linked with the first clamping base plate through a guide rod and a spring, so as to move synchronously with the horizontal adjustment of the first clamping base plate.

5. A bending module according to claim 3, characterized in that: The bending forming part includes a second fixed plate, a second clamping cylinder, a first clamping bottom shell, and a first clamping top shell. A first driving device is connected to the second fixed plate, and the third fine-tuning device is fitted to the second fixed plate. The second clamping cylinder and the first clamping bottom shell are fixed on the movable end of the third fine-tuning device. The movable end of the second clamping cylinder pushes the first clamping top shell toward the first clamping bottom shell, so that the plastic profile is wrapped between the first clamping top shell and the first clamping bottom shell and forms the heating cavity.

6. A bending module according to claim 5, characterized in that: The first clamping base shell includes a first clamping main base shell and a first clamping secondary base shell. The first clamping secondary base shell is fixedly mounted on the movable end of the third fine-tuning device, and the first clamping secondary base shell is provided with a horizontal slide rail. The first clamping main base shell is slidably mounted on the slide rail and fixed with bolts. The first clamping face shell includes a first clamping main face shell and a first clamping secondary face shell. The first clamping secondary face shell is provided with a horizontal slide rail. The first clamping main face shell is slidably mounted on the slide rail and fixed with bolts. The first clamping secondary face shell is linked to the first clamping secondary base shell through a guide rod and a spring, so as to move synchronously with the horizontal adjustment of the first clamping secondary base shell.

7. A bending module according to claim 5 or 6, characterized in that: The bending and forming part also includes several guide wheels, which are disposed on one side of the heating cavity formed by the first clamping face shell and the first clamping bottom shell; the guide grooves on the surface of the guide wheels are aligned with the plastic profile placement slots in the heating cavity.

8. A luggage frame bending machine, characterized in that, It includes a first adjusting device, a second adjusting device, a third adjusting device, and four bending modules as described in claim 7, wherein the four bending modules include a first bending module, a second bending module, a third bending module, and a fourth bending module. The first adjustment device includes two adjustable movable ends that are close to or far apart from each other. The two adjustable movable ends of the first adjustment device are fixedly connected to the first fine-tuning device of the first bending module and the second bending module, respectively, so that the first bending module and the second bending module are close to or far apart from each other. The second adjustment device and the third adjustment device each include an adjustment movable end. One end of the second adjustment device is fitted onto the second fixed plate of the first bending module of the second fixed plate. The adjustment movable end of the second adjustment device is connected to the first fine-tuning device of the third bending module. One end of the third adjustment device is fitted with the second fixing plate of the second bending module and the first fine-tuning device of the fourth bending module.

9. A luggage frame bending machine according to claim 8, characterized in that: The first adjustment device, the second adjustment device, and the third adjustment device have the same structure. The first adjustment device includes a first adjustment motor, a bidirectional screw, and sliding nuts movably sleeved at both ends of the bidirectional screw. The first adjustment motor drives the bidirectional screw to rotate and causes the two sliding nuts to move closer to or further away from each other along the direction of the bidirectional screw. At the same time, the two sliding nuts constitute the adjustment movable end.

10. A luggage frame bending machine according to claim 8, characterized in that: The second and third adjustment devices include a second adjustment motor, a one-way screw, and a sliding nut movably sleeved on the one-way screw. The second adjustment motor drives the one-way screw to rotate and causes the sliding nut to move in the one-way screw direction. At the same time, the sliding nut constitutes the adjustment movable end.

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