U-shaped bending machine and application method

Abstract

The invention belongs to the technical field of bending equipment, and particularly relates to a U-shaped bending machine and an application method. The U-shaped bending machine comprises a base assembly, an oil cylinder fixing assembly, a hydraulic driving assembly, a mold assembly and a hydraulic control assembly; the oil cylinder fixing assembly is fixedly connected to the upper surface of the base assembly, the hydraulic driving assembly is installed in the oil cylinder fixing assembly and is detachably and fixedly connected, the mold assembly comprises an upper mold and a lower mold which are matched with each other, and the upper mold is fixedly connected with the power output end of the hydraulic driving assembly; the lower die is fixedly installed at the front end in the oil cylinder fixing assembly. A mechanical bending structure is adopted, a traditional manual gas welding heating and roasting machining mode is replaced, the problems that manual operation is low in efficiency and tedious in process are well solved, standardized machining of strip steel hooks and mine metal components is achieved, the production efficiency of large-scale machining is greatly improved, meanwhile, the product size consistency is guaranteed, and the production cost is reduced. The processing quality is improved.

Description

Technical Field

[0001] This invention relates to the field of bending equipment technology, specifically to a U-shaped bending machine and its application method. Background Technology

[0002] In the installation and construction of steel fences in mine shafts, a large number of upper and lower hooks made of strip steel are required. The U-shaped groove of the lower hook has specific groove width and depth parameters, and conventional bending machines cannot meet the processing requirements of this irregular U-shaped structure.

[0003] The existing processing method involves manual bending, which requires heating the strip steel with gas welding before manual bending. This method has several drawbacks: First, manual operation requires multiple people, resulting in high labor costs. Furthermore, the gas welding heating and manual bending process is cumbersome, time-consuming per piece, and inefficient, making it difficult to meet the needs of large-scale processing. Second, gas welding relies on gas, which has high procurement, storage, and usage costs, and poses safety hazards such as gas leaks and explosions. Third, the manual bending process requires the use of tools such as sledgehammers, which greatly increases the risk of hand injuries and other workplace accidents, resulting in poor operational safety. Fourth, the processing accuracy of manual bending is greatly affected by the operator's skill level, leading to poor product dimensional consistency and failing to guarantee the processing quality and subsequent assembly compatibility of the hooks. To solve these technical problems, there is an urgent need to develop a mechanized equipment specifically designed for U-shaped bending of strip steel hooks. This would enable standardized and efficient hook processing, reduce labor input, and improve processing safety and product quality. Therefore, it is necessary to develop a U-shaped bending machine and its application method. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0006] A U-shaped bending machine includes a base assembly, a cylinder fixing assembly, a hydraulic drive assembly, a mold assembly, and a hydraulic control assembly;

[0007] The cylinder fixing assembly is fixedly connected to the upper surface of the base assembly. The hydraulic drive assembly is installed inside the cylinder fixing assembly and is detachably fixedly connected. The mold assembly includes a matching upper mold and a lower mold. The upper mold is fixedly connected to the power output end of the hydraulic drive assembly. The lower mold is fixedly installed in the front end of the cylinder fixing assembly, and the lower mold and the upper mold are horizontally corresponding to each other. The hydraulic control assembly is located on the upper surface of the cylinder fixing assembly, and the hydraulic control assembly is connected to the inlet and outlet of the hydraulic drive assembly through hydraulic pipelines.

[0008] The forming groove of the lower mold is a convex groove, which includes a front forming section and a rear release section. The front forming section matches the U-shaped forming size of the blank to be processed. The rear release section is connected to the front forming section, and the groove width of the rear release section is greater than the groove width of the front forming section. The power output end of the hydraulic drive component can push the upper mold to enter the convex groove of the lower mold in the horizontal direction to extrude the blank.

[0009] In a preferred embodiment of the U-shaped bending machine of the present invention, the cylinder fixing assembly includes two symmetrically arranged fixing plates. Both fixing plates are fixedly connected to the upper surface of the base assembly. The two fixing plates form an integral frame shape. A first mounting hole is provided at the rear end of each fixing plate. The first mounting holes of the two fixing plates are coaxially and horizontally arranged. A mounting hole is provided at the front middle end of each fixing plate. The lower die is fixedly installed on the inner left side of the two fixing plates.

[0010] In a preferred embodiment of the U-shaped bending machine of the present invention, the hydraulic drive assembly includes a cylinder body and a cylinder fixing shaft. The cylinder body is adapted to be disposed between two fixed upright plates in a horizontal direction. The power output end of the cylinder body is horizontally disposed towards the mold assembly. The rear seat of the cylinder body is provided with a third mounting hole that matches the first mounting hole. The cylinder fixing shaft passes sequentially through the first mounting hole of one of the fixed upright plates, the third mounting hole of the cylinder body, and the first mounting hole of the other fixed upright plate.

[0011] In a preferred embodiment of the U-shaped bending machine described in this invention, the cylinder fixing assembly further includes an upper fixing plate assembly and a lower fixing plate assembly. The upper fixing plate assembly is disposed on the upper side of the cylinder body, and both ends of the upper fixing plate assembly are fixedly connected to the inner sidewalls of the two fixing plates, respectively. The lower fixing plate assembly is disposed on the lower side of the cylinder body, and both ends of the lower fixing plate assembly are fixedly connected to the inner sidewalls of the two fixing plates, respectively. Both the upper fixing plate assembly and the lower fixing plate assembly are in contact with the outer sidewall of the cylinder body.

[0012] In a preferred embodiment of the U-shaped bending machine of the present invention, the upper fixed plate assembly includes two symmetrically arranged first arc-shaped plates. The arc surfaces of the two first arc-shaped plates are in contact with the upper outer side wall of the cylinder body, and the opposite ends of the two first arc-shaped plates are respectively fixedly connected to the inner side walls of the two fixed upright plates. A gap is left between the opposite ends of the two first arc-shaped plates. The plate surface of the first arc-shaped plate is an arc-shaped structure adapted to the outer side wall of the cylinder body. The two first arc-shaped plates are distributed at different positions on the upper side of the cylinder body along the axial direction of the cylinder body.

[0013] In a preferred embodiment of the U-shaped bending machine of the present invention, the lower fixed plate group includes two symmetrically arranged second arc-shaped plates. The arc surfaces of the two second arc-shaped plates are in contact with the lower outer side wall of the cylinder body, and the opposite ends of the two second arc-shaped plates are respectively fixedly connected to the inner side walls of the two fixed upright plates. A gap is left between the opposite ends of the two second arc-shaped plates. The plate surface of the second arc-shaped plate is an arc-shaped structure adapted to the outer side wall of the cylinder body. The two second arc-shaped plates are distributed at different positions on the lower side of the cylinder body along the axial direction of the cylinder body, and the second arc-shaped plates correspond to the first arc-shaped plates in the circumferential direction of the cylinder body.

[0014] In a preferred embodiment of the U-shaped bending machine of the present invention, the upper die is provided with a connecting part at one end near the cylinder body. The connecting part is a columnar structure. The power output end of the cylinder body is provided with an internal threaded hole. The outer side wall of the connecting part is provided with an external thread that matches the internal threaded hole. The upper die is threadedly connected to the internal threaded hole of the power output end of the cylinder body through the external thread of the connecting part. The central axis of the upper die is horizontally aligned with the power output axis of the cylinder body.

[0015] In a preferred embodiment of the U-shaped bending machine of the present invention, the lower mold is provided with fixing flanges at both ends, the plate surface of the fixing flange is in contact with the inner side wall of the fixing plate, the fixing flange is provided with fixing holes, and fixing bolt groups are installed in the fixing holes. The fixing bolt groups pass through the mounting holes of the fixing plate and the fixing holes of the fixing flange in sequence and are locked, thereby fixing the lower mold to the inner side of the two fixing plates.

[0016] In a preferred embodiment of the U-shaped bending machine of the present invention, the hydraulic control assembly includes a support plate, a hydraulic station, and a drive motor. The support plate is fixedly connected to the upper surface of two fixed upright plates. The hydraulic station is placed and fixed on the upper surface of the support plate. The drive motor is connected to the hydraulic station. The power output end and the oil return end of the hydraulic station are both connected to hydraulic oil pipes. The end of the hydraulic oil pipe away from the hydraulic station is connected to the oil inlet and oil outlet of the cylinder body, respectively. A sealing joint is provided at the connection between the hydraulic oil pipe and the oil inlet and oil outlet of the cylinder body. A sealing gasket is provided inside the sealing joint. The sealing gasket is sandwiched between the sealing joint and the connection end face of the cylinder body.

[0017] As a preferred embodiment of the U-shaped bending machine and its application method described in this invention, the following steps are included:

[0018] Step 1: Place the base assembly on a horizontal processing site, fix the two fixed upright plates on the upper surface of the base assembly, place the cylinder body between the two fixed upright plates in the horizontal direction, fix the cylinder body to the fixed upright plates by passing the cylinder fixing shaft through the first mounting hole and the third mounting hole in sequence, and then fix the upper fixed plate group and the lower fixed plate group to the inner side wall of the fixed upright plate to vertically limit the cylinder body.

[0019] Step 2: Fix the lower mold to the inner left side of the two fixed upright plates using the fixing bolt group, and connect the upper mold to the cylinder body through the connecting part with threads to ensure that the central axis of the upper mold is collinear with the power output axis of the cylinder body and is horizontally aligned with the lower mold.

[0020] Step 3: Fix the support plate on the upper surface of the fixed upright plate, fix the hydraulic station and connect the drive motor, connect the hydraulic station and the oil inlet and outlet of the cylinder body through the hydraulic oil pipe with the sealing joint, and add hydraulic oil to the hydraulic station.

[0021] Step 4: Connect the power to start the hydraulic station, control the horizontal extension and retraction of the power output end of the cylinder body, push the upper mold close to and insert into the convex groove of the lower mold, and check the horizontal fit accuracy of the mold, the sealing of the hydraulic connection and the firmness of the connection of each component.

[0022] Step 5: Place the strip steel billet in the front forming section of the convex groove, start the hydraulic station to push the upper mold into the convex groove in the horizontal direction, and squeeze the billet to make it fit the convex groove to form a U-shaped structure;

[0023] Step 6: Control the power output end of the hydraulic cylinder body to retract horizontally, drive the upper mold to exit the convex groove in the horizontal direction and move away from the lower mold, and remove the processed U-shaped hook from the convex groove of the lower mold;

[0024] Step 7: Repeat steps 5 and 6 to achieve large-scale continuous processing. After processing is completed, turn off the drive motor and disconnect the power supply to the equipment.

[0025] The beneficial effects of this invention are:

[0026] 1. The equipment adopts a mechanized bending structure, replacing the traditional manual gas welding and heating process, which effectively solves the problems of low efficiency and cumbersome process of manual operation. It realizes the standardized processing of steel hooks and mining metal components bending, greatly improves the production efficiency of mass production, and at the same time ensures the consistency of product dimensions and improves processing quality.

[0027] 2. The cylinder body is rigidly fixed to the fixed plate via the cylinder fixed shaft. With the help of the three-dimensional vertical limiting structure of the upper and lower fixed plate groups, the cylinder body can be effectively prevented from rotating circumferentially, shifting radially, and displacing vertically during operation. This ensures the horizontal and lateral accuracy of the cylinder's power output, avoids upper mold jamming and blank processing deviation, and ensures the accuracy of bending processing. The lower mold is a fixed installation structure that provides a stable forming cavity for blank bending, further improving processing accuracy.

[0028] 3. The equipment adopts a modular structure design, with each component firmly connected and precisely matched. The assembly and debugging process is simple and does not require professional technicians. Only one person with simple training can complete the equipment setup and operation. The upper mold is connected to the internal thread hole of the cylinder body through the external thread of the connecting part. It is a detachable fixed structure, which can quickly replace the matching upper mold according to different specifications of blanks, improving the adaptability and flexibility of the equipment.

[0029] 4. By abandoning the traditional manual gas welding heating and hammering processing method, the safety hazards of gas leakage, explosion and hand injuries during hammering are eliminated, greatly improving the operational safety of the processing process and reducing production safety risks. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 For the present invention Figure 1 A schematic diagram of the structure from a side-top view;

[0033] Figure 3This is a schematic diagram of the structure of the component below the support plate of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the mold and other components of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of the cylinder body and upper mold and other components of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of the upper fixing plate assembly and the lower fixing plate assembly according to a first embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the upper fixing plate assembly and the lower fixing plate assembly in a second embodiment of the present invention.

[0038] In the diagram: Base assembly - 100; Cylinder fixing assembly - 200; Fixing plate - 201; First mounting hole - 202; Mounting hole position - 203; Upper fixing plate assembly - 204; Lower fixing plate assembly - 205; First arc plate - 206; Second arc plate - 207; Hydraulic drive assembly - 300; Cylinder body - 301; Cylinder fixing shaft - 302; Third mounting hole - 303; Internal threaded hole - 304; Mold assembly - 400; Upper mold - 401; Lower mold - 402; Convex groove - 403; Front forming section - 404; Rear release section - 405; Connecting part - 406; External thread - 407; Fixing flange - 408; Fixing hole - 409; Fixing bolt group - 410; Hydraulic control assembly - 500; Bearing plate - 501; Hydraulic station - 502; Hydraulic oil pipe - 503; Drive motor - 504; Sealing joint - 505; Sealing gasket - 506. Detailed Implementation

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0041] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0042] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0043] Please see Figures 1-7 The diagram shows a structural schematic of an embodiment of a U-shaped bending machine and its application method according to the present invention. Please refer to [link / reference]. Figures 1-7 This paper provides a detailed introduction to a U-shaped bending machine and its application method.

[0044] A U-shaped bending machine includes a base assembly 100, a cylinder fixing assembly 200, a hydraulic drive assembly 300, a mold assembly 400, and a hydraulic control assembly 500. The base assembly 100 serves as the overall support foundation and provides a stable horizontal installation platform for the cylinder fixing assembly 200. This ensures the horizontal installation accuracy of all components of the equipment from the foundation level and avoids problems such as mold fit deviation and power output offset caused by foundation tilt. Two symmetrically arranged fixed uprights 201 of the cylinder fixing assembly 200 are firmly connected to the base assembly 100, serving as the core mounting carrier for the hydraulic drive assembly 300 and the mold assembly 400. The first mounting hole 202 at the rear end of the fixed upright 201 provides the mounting foundation for fixing the cylinder body 301, and the mounting hole 203 at the middle front end provides a matching structure for fixing the lower mold 402. The symmetrical structural design ensures the coaxiality of the installation of the hydraulic drive assembly 300 and the mold assembly 400, and structurally ensures the horizontal accuracy of the bending process. The lower mold 402 is fixedly installed on the inner left side of the two fixed uprights 201, providing a fixed forming cavity for the bending and forming of the blank, and avoiding the impact of mold displacement on the product dimensional accuracy and consistency during processing.

[0045] The cylinder body 301 of the hydraulic drive assembly 300 is horizontally positioned between two fixed vertical plates 201, with the power output end horizontally facing the mold assembly 400. The cylinder fixing shaft 302 passes sequentially through the first mounting hole 202 of one fixed vertical plate 201, the third mounting hole 303 of the cylinder body 301, and the first mounting hole 202 of the other fixed vertical plate 201, achieving a rigid fixed connection between the cylinder body 301 and the two fixed vertical plates 201. This fixing method significantly improves the installation stability of the cylinder body 301, effectively avoiding problems such as circumferential rotation and radial offset that occur during the operation of the cylinder body 301, and ensuring that the power output direction of the cylinder body 301 always remains horizontal and lateral, providing a stable and precise power foundation for the horizontal extrusion action of the upper mold 401. The upper fixing plate group 204 and the lower fixing plate group 205 of the cylinder fixing assembly 200 are respectively set on the upper and lower sides of the cylinder body 301, and both ends are fixedly connected to the inner side wall of the fixing plate 201. The plate surface is tightly attached to the outer side wall of the cylinder body 301, forming a vertical all-round limit on the cylinder body 301. It cooperates with the rigid fixation of the cylinder fixing shaft 302 to realize the three-dimensional fixing limit of the cylinder body 301, effectively preventing the cylinder body 301 from displacement and shaking in the vertical direction during operation, further ensuring the horizontal accuracy of the power output, and avoiding problems such as jamming of the upper mold 401 and blank processing deviation caused by vertical offset of the cylinder body 301.

[0046] Refer again Figure 6 The upper fixed plate assembly 204 can be adopted Figure 6 In the first embodiment, a curved surface is machined from a single piece of sheet metal. This curved surface is adapted to and fits the upper outer side wall of the cylinder body 301, and the two outer ends are fixedly connected to the inner side wall of the fixed upright plate 201.

[0047] Refer again Figure 7 The upper fixing plate assembly 204 can also be used Figure 7 In the second embodiment, the upper fixed plate assembly 204 includes two symmetrically arranged first arc-shaped plates 206. The arc-shaped surface of the first arc-shaped plate 206 is adapted to and fits against the upper outer wall of the cylinder body 301, and the opposite ends are fixedly connected to the inner wall of the fixed vertical plate 201. A gap is left between the opposite ends. The two first arc-shaped plates 206 are distributed at different positions along the axial direction of the cylinder body 301. The multi-point limiting structure design improves the stability of vertical limiting. The reserved gap can not only reduce the contact area with the cylinder body 301 and reduce the frictional resistance when the cylinder body 301 moves horizontally, but also provide space for the thermal expansion and contraction of the cylinder body 301 after working and heating up, so as to avoid the cylinder body 301 from jamming and affecting the motion accuracy.

[0048] Refer again Figure 6 The lower fixed plate assembly 205 can be adopted Figure 6In the first embodiment, a curved surface is machined from a single piece of sheet metal. This curved surface is adapted to and fits the lower outer side wall of the cylinder body 301, and the two outer ends are fixedly connected to the inner side wall of the fixed upright plate 201.

[0049] Refer again Figure 7 The lower fixed plate assembly 205 can also be adopted Figure 7 In the second embodiment, the lower fixing plate assembly 205 includes two symmetrically arranged second arc-shaped plates 207. The arc-shaped surface of the second arc-shaped plate 207 is adapted to and fits against the lower outer side wall of the cylinder body 301. The installation method is the same as that of the first arc-shaped plate 206, and they correspond to each other in the circumferential direction of the cylinder body 301. They form a vertically symmetrical limiting structure with the first arc-shaped plate 206, which further improves the vertical limiting effect of the cylinder body 301. At the same time, it also reserves space for the thermal expansion and contraction of the cylinder body 301. The non-fully enclosed structural design also facilitates the inspection and maintenance of the bottom of the cylinder body 301.

[0050] The upper mold 401 and lower mold 402 of the mold assembly 400 are arranged horizontally and correspondingly to each other, and are the core components for realizing the U-shaped forming of the blank. The lower mold 402 has fixing flanges 408 at both ends. The plate surface of the fixing flanges 408 is in contact with the inner side wall of the fixing plate 201. Fixing holes 409 are opened on the fixing flanges 408. The fixing bolt group 410 passes through the mounting holes 203 of the fixing plate 201 and the fixing holes 409 of the fixing flanges 408 in sequence and locks them, realizing the fixed installation of the lower mold 402 on the left side inside the two fixing plates 201. This fixing method is firm and ensures that the lower mold 402 remains fixed in a fixed state during the processing without any lateral movement, providing a stable forming base for bending the blank. The forming groove of the lower mold 402 is a convex groove 403, including a front forming section 404 and a rear release section 405. The size of the front forming section 404 matches the U-shaped forming size of the blank to be processed, ensuring the dimensional accuracy and shape consistency of the blank after bending. The rear release section 405 is connected to the front forming section 404 and the groove width is greater than that of the front forming section 404. It can effectively release the deformation stress generated during the bending of the strip steel blank, avoid the blank from cracking, deformation and other quality problems due to stress concentration, and simplify the demolding and unloading process of the product, so that the processed U-shaped hook can be easily removed from the lower mold 402, improving processing efficiency.

[0051] The upper mold 401 is provided with a columnar connecting part 406 at one end near the cylinder body 301. The outer wall of the connecting part 406 is provided with an external thread 407. The power output end of the cylinder body 301 is provided with an internal thread hole 304 that matches the external thread 407. The upper mold 401 is threadedly connected to the internal thread hole 304 of the cylinder body 301 through the external thread 407 of the connecting part 406, so as to achieve a detachable fixed connection with the hydraulic drive component 300. This connection method is convenient to disassemble and assemble, and it is convenient to replace the upper mold 401 with a matching one according to different specifications of blanks, thereby improving the adaptability of the equipment. The central axis of the upper mold 401 is set horizontally in the same straight line as the power output axis of the cylinder body 301. This ensures that the upper mold 401 does not deviate or fall off when it moves horizontally with the power output end of the cylinder body 301. It always maintains a horizontal movement trajectory that is collinear with the power output axis of the cylinder body 301, ensuring that the upper mold 401 can accurately and smoothly enter the convex groove 403 of the lower mold 402 to extrude the blank and ensure the accuracy of bending processing.

[0052] The hydraulic control assembly 500 includes a support plate 501, a hydraulic station 502, a drive motor 504, hydraulic oil pipes 503, a sealing joint 505, and a sealing gasket 506. The support plate 501 is fixedly connected to the upper surface of two fixed vertical plates 201. The hydraulic station 502 is placed and fixed on the upper surface of the support plate 501. This integrated design significantly reduces the overall footprint of the equipment and brings the hydraulic station 502 closer to the cylinder body 301, shortening the connection length of the hydraulic oil pipes 503, reducing hydraulic oil delivery losses, and minimizing the risk of oil leakage. The drive motor 504 is connected to the hydraulic station 502, providing continuous and stable power to ensure the normal operation of the hydraulic system, and thus providing stable horizontal lateral power to the cylinder body 301 to meet the power requirements for bending the billet. The two ends of the hydraulic oil pipe 503 are respectively connected to the power output end and oil return end of the hydraulic station 502 and the oil inlet and oil outlet of the cylinder body 301 to realize the circulation and transportation of hydraulic oil. The connection between the hydraulic oil pipe 503 and the oil inlet and oil outlet of the cylinder body 301 is equipped with a sealing joint 505. The sealing joint 505 is equipped with a sealing gasket 506 inside. The sealing gasket 506 is sandwiched between the sealing joint 505 and the connection end face of the cylinder body 301, forming a double sealing structure, which greatly improves the sealing performance of the hydraulic connection part, effectively prevents the hydraulic oil from leaking during transportation, ensures the pressure stability of the hydraulic system, and makes the power output of the cylinder body 301 more stable and controllable. At the same time, the threaded sealing joint 505 is easy to disassemble and assemble, which facilitates the replacement and maintenance of the hydraulic oil pipe 503.

[0053] The application method of the U-shaped bending machine is as follows: First, assemble the equipment and place the base assembly 100 on a level processing site to ensure the levelness of the installation foundation. Then, fix two fixed upright plates 201 symmetrically on the upper surface of the base assembly 100. Next, place the cylinder body 301 horizontally between the two fixed upright plates 201. The cylinder fixing shaft 302 passes through the first mounting hole 202 and the third mounting hole 303 of the fixed upright plate 201 in sequence to rigidly fix the cylinder body 301 to the fixed upright plate 201. Finally, fix the upper fixing plate group 204 and the lower fixing plate group 205 to the inner wall of the fixed upright plate 201 so that the plate surface is tightly attached to the outer wall of the cylinder body 301, thus completing the vertical limit of the cylinder body 301. Each step is carried out with regard to horizontal accuracy and fixing stability, which can quickly complete the accurate and firm construction of the main body of the equipment.

[0054] During mold installation, the fixing bolt group 410 passes through the mounting holes 203 of the fixing plate 201 and the fixing holes 409 of the fixing flange 408 of the lower mold 402 in sequence and is locked to fix the lower mold 402 to the inner left side of the two fixing plates 201. Then, the upper mold 401 is threaded to the internal thread hole 304 of the power output end of the cylinder body 301 through the external thread 407 of the connecting part 406. During the installation process, it is ensured that the central axis of the upper mold 401 is collinear with the power output axis of the cylinder body 301, and the upper mold 401 and the lower mold 402 are horizontally aligned. The fixed lower mold 402 does not require additional position adjustment, which simplifies the installation process and ensures the accuracy of mold fitting. During the installation of the hydraulic components, the support plate 501 is fixed on the upper surface of the two fixed upright plates 201, and then the hydraulic station 502 is placed and fixed on the upper surface of the support plate 501. The drive motor 504 is then connected to the hydraulic station 502. Subsequently, the power output end and return end of the hydraulic station 502 are connected to the oil inlet and outlet of the cylinder body 301 through the hydraulic oil pipe 503 with the sealing joint 505. Finally, sufficient hydraulic oil is added into the hydraulic station 502. The setting of the sealing joint 505 ensures the sealing of the hydraulic system from the installation stage, avoiding oil leakage problems during subsequent use.

[0055] During equipment debugging, the drive motor 504 is started by connecting the power, which drives the hydraulic station 502 to work. The hydraulic station 502 controls the power output end of the cylinder body 301 to perform horizontal extension and retraction movements, pushing the upper mold 401 close to and into the convex groove 403 of the lower mold 402. The horizontal fit accuracy of the upper mold 401 and the lower mold 402 is visually checked. At the same time, the sealing of each connection of the hydraulic oil pipe 503 and the connection firmness of each component of the equipment are checked. Problems such as horizontal deviation, poor sealing, and loose connection during installation are promptly identified and resolved to ensure the stability and processing accuracy of the subsequent processing. During billet processing, the strip steel billet to be processed is placed in the front forming section 404 of the convex groove 403. The hydraulic station 502 is started to drive the power output end of the cylinder body 301 to extend forward horizontally, pushing the upper mold 401 to enter the convex groove 403 in the horizontal direction, extruding the billet and making the billet fit with the front forming section 404 of the convex groove 403 to form a standard U-shaped structure. The fully mechanized operation replaces the traditional manual gas welding heating and hammering processing method, which greatly improves processing efficiency and product consistency.

[0056] During demolding and part removal, the hydraulic station 502 controls the horizontal retraction of the power output end of the cylinder body 301, driving the upper mold 401 to exit the convex groove 403 horizontally and move away from the lower mold 402. Utilizing the structural design of the release section 405 at the rear of the convex groove 403, the finished U-shaped hook is easily removed from the convex groove 403 of the lower mold 402 without the need for additional auxiliary tools, making operation convenient. By repeating the above steps of blank processing and demolding, large-scale continuous processing of steel hooks can be achieved, meeting the large-volume demand for hooks in mining construction. After processing, simply turn off the drive motor 504 and disconnect the power supply to the equipment; the operation process is simple and safe.

[0057] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A U-shaped bending machine, comprising a base assembly (100), a cylinder fixing assembly (200), a hydraulic drive assembly (300), a die assembly (400), and a hydraulic control assembly (500), characterized in that... ； The cylinder fixing assembly (200) is fixedly connected to the upper surface of the base assembly (100). The hydraulic drive assembly (300) is installed inside the cylinder fixing assembly (200) and is detachably fixedly connected. The mold assembly (400) includes a cooperating upper mold (401) and a lower mold (402). The upper mold (401) is fixedly connected to the power output end of the hydraulic drive assembly (300). The lower mold (402) is fixedly installed in the front end of the cylinder fixing assembly (200). The lower mold (402) and the upper mold (401) are arranged horizontally to each other. The hydraulic control assembly (500) is located on the upper surface of the cylinder fixing assembly (200). The hydraulic control assembly (500) is connected to the inlet and outlet of the hydraulic drive assembly (300) through hydraulic pipelines. The forming groove of the lower mold (402) is a convex groove (403). The convex groove (403) includes a front forming section (404) and a rear release section (405). The front forming section (404) matches the U-shaped forming size of the blank to be processed. The rear release section (405) is connected to the front forming section (404), and the groove width of the rear release section (405) is greater than the groove width of the front forming section (404). The power output end of the hydraulic drive component (300) can push the upper mold (401) to enter the convex groove (403) of the lower mold (402) in the horizontal direction to squeeze the blank.

2. The U-shaped bending machine according to claim 1, characterized in that, The cylinder fixing assembly (200) includes two symmetrically arranged fixing plates (201). Both fixing plates (201) are fixedly connected to the upper surface of the base assembly (100). The two fixing plates (201) form an integral frame shape. The rear end of the fixing plate (201) is provided with a first mounting hole (202). The first mounting holes (202) of the two fixing plates (201) are coaxially and horizontally arranged. The front end of the fixing plate (201) is provided with a mounting hole (203). The lower mold (402) is fixedly installed on the inner left side of the two fixing plates (201).

3. A U-shaped bending machine according to claim 2, characterized in that, The hydraulic drive assembly (300) includes a cylinder body (301) and a cylinder fixing shaft (302). The cylinder body (301) is adapted to be disposed between two fixed upright plates (201) in a horizontal direction. The power output end of the cylinder body (301) is horizontally disposed towards the mold assembly (400). The rear seat of the cylinder body (301) is provided with a third mounting hole (303) that matches the first mounting hole (202). The cylinder fixing shaft (302) passes through the first mounting hole (202) of one of the fixed upright plates (201), the third mounting hole (303) of the cylinder body (301), and the first mounting hole (202) of the other fixed upright plate (201) in sequence.

4. A U-shaped bending machine according to claim 3, characterized in that, The cylinder fixing assembly (200) further includes an upper fixing plate assembly (204) and a lower fixing plate assembly (205). The upper fixing plate assembly (204) is disposed on the upper side of the cylinder body (301), and both ends of the upper fixing plate assembly (204) are fixedly connected to the inner sidewalls of the two fixing plates (201), respectively. The lower fixing plate assembly (205) is disposed on the lower side of the cylinder body (301), and both ends of the lower fixing plate assembly (205) are fixedly connected to the inner sidewalls of the two fixing plates (201), respectively. Both the upper fixing plate assembly (204) and the lower fixing plate assembly (205) are in contact with the outer sidewall of the cylinder body (301).

5. A U-shaped bending machine according to claim 4, characterized in that, The upper fixed plate assembly (204) includes two symmetrically arranged first arc-shaped plates (206). The arc surfaces of the two first arc-shaped plates (206) are in contact with the upper outer side wall of the cylinder body (301), and the opposite ends of the two first arc-shaped plates (206) are respectively fixedly connected to the inner side wall of the two fixed upright plates (201). A gap is left between the opposite ends of the two first arc-shaped plates (206). The plate surface of the first arc-shaped plate (206) is an arc-shaped structure adapted to the outer side wall of the cylinder body (301). The two first arc-shaped plates (206) are distributed along the axial direction of the cylinder body (301) at different positions on the upper side of the cylinder body (301).

6. A U-shaped bending machine according to claim 4, characterized in that, The lower fixed plate assembly (205) includes two symmetrically arranged second arc-shaped plates (207). The arc surfaces of the two second arc-shaped plates (207) are in contact with the lower outer side wall of the cylinder body (301), and the opposite ends of the two second arc-shaped plates (207) are respectively fixedly connected to the inner side wall of the two fixed upright plates (201). A gap is left between the opposite ends of the two second arc-shaped plates (207). The plate surface of the second arc-shaped plate (207) is an arc-shaped structure adapted to the outer side wall of the cylinder body (301). The two second arc-shaped plates (207) are distributed along the axial direction of the cylinder body (301) at different positions on the lower side of the cylinder body (301), and the second arc-shaped plate (207) and the first arc-shaped plate (206) correspond to each other in the circumferential direction of the cylinder body (301).

7. A U-shaped bending machine according to claim 3, characterized in that, The upper mold (401) is provided with a connecting part (406) at one end near the cylinder body (301). The connecting part (406) is a columnar structure. The power output end of the cylinder body (301) is provided with an internal threaded hole (304). The outer side wall of the connecting part (406) is provided with an external thread (407) that matches the internal threaded hole (304). The upper mold (401) is threadedly connected to the internal threaded hole (304) of the power output end of the cylinder body (301) through the external thread (407) of the connecting part (406). The central axis of the upper mold (401) is horizontally arranged in the same straight line as the power output axis of the cylinder body (301).

8. A U-shaped bending machine according to claim 2, characterized in that, The lower mold (402) is provided with fixing flanges (408) at both ends. The plate surface of the fixing flange (408) is in contact with the inner side wall of the fixing plate (201). The fixing flange (408) is provided with fixing holes (409). Fixing bolt groups (410) are installed in the fixing holes (409). The fixing bolt groups (410) pass through the mounting holes (203) of the fixing plate (201) and the fixing holes (409) of the fixing flange (408) in sequence and are locked, so that the lower mold (402) is fixedly installed on the inner side of the two fixing plates (201).

9. A U-shaped bending machine according to claim 1, characterized in that, The hydraulic control assembly (500) includes a support plate (501), a hydraulic station (502), and a drive motor (504). The support plate (501) is fixedly connected to the upper surface of two fixed upright plates (201). The hydraulic station (502) is placed and fixed on the upper surface of the support plate (501). The drive motor (504) is connected to the hydraulic station (502). The power output end and the oil return end of the hydraulic station (502) are both connected to hydraulic oil pipes (503). The end of the hydraulic oil pipe (503) away from the hydraulic station (502) is connected to the oil inlet and oil outlet of the cylinder body (301) respectively. A sealing joint (505) is provided at the connection between the hydraulic oil pipe (503) and the oil inlet and oil outlet of the cylinder body (301). A sealing gasket (506) is provided inside the sealing joint (505). The sealing gasket (506) is sandwiched between the sealing joint (505) and the connection end face of the cylinder body (301).

10. A U-shaped bending machine and its application method, implemented by a U-shaped bending machine according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Place the base assembly (100) on a horizontal processing site, fix two fixed upright plates (201) on the upper surface of the base assembly (100), place the cylinder body (301) horizontally between the two fixed upright plates (201), fix the cylinder body (301) to the fixed upright plate (201) by passing the cylinder fixing shaft (302) through the first mounting hole (202) and the third mounting hole (303) in sequence, and then fix the upper fixing plate group (204) and the lower fixing plate group (205) on the inner side wall of the fixed upright plate (201) to vertically limit the cylinder body (301); Step 2: Fix the lower mold (402) to the inner left side of the two fixed upright plates (201) by fixing bolt group (410), and connect the upper mold (401) to the cylinder body (301) by connecting part (406) to ensure that the central axis of the upper mold (401) is collinear with the power output axis of the cylinder body (301) and is horizontally corresponding to the lower mold (402); Step 3: Fix the bearing plate (501) on the upper surface of the fixed upright plate (201), fix the hydraulic station (502) and connect the drive motor (504), connect the hydraulic station (502) and the oil inlet and outlet of the cylinder body (301) through the hydraulic oil pipe (503) with the sealing joint (505), and add hydraulic oil to the hydraulic station (502); Step 4: Connect the power to start the hydraulic station (502), control the horizontal extension and retraction of the power output end of the cylinder body (301), push the upper mold (401) close to and extend into the convex groove (403) of the lower mold (402), and check the horizontal fit accuracy of the mold, the sealing of the hydraulic connection and the firmness of the connection of each component. Step 5: Place the strip steel billet in the front forming section (404) of the convex groove (403), start the hydraulic station (502) to push the upper mold (401) to enter the convex groove (403) in the horizontal direction, and squeeze the billet to make it fit the convex groove (403) to form a U-shaped structure; Step 6: Control the power output end of the hydraulic cylinder body (301) to retract horizontally, drive the upper mold (401) to exit the convex groove (403) in the horizontal direction and move away from the lower mold (402), and take out the processed U-shaped hook from the convex groove (403) of the lower mold (402); Step 7: Repeat steps 5 and 6 to achieve large-scale continuous processing. After processing is completed, turn off the drive motor (504) and disconnect the power supply to the equipment.

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