A sheet metal bending machine convenient to adjust for machine case production

Abstract

The utility model relates to a sheet metal bending machine for case production convenient to adjust. Including support, the top sliding installation of which is equipped with two groups of bending device of symmetrical settings, install mobile adjusting assembly on the support for adjusting the interval between two groups of bending device, still include adjustable positioning assembly installed at both ends of support, two groups of adjustable positioning assembly correspond respectively with two groups of bending device setting, bending device includes with the sliding connection of support sliding mounting seat, install outer bending assembly at its outer end portion for bending sheet metal spare, still include the pressing block component installed on the sliding mounting seat for pressing sheet metal spare on outer bending assembly, still include the inner bending assembly installed on the sliding mounting seat for the bending part of sheet metal spare is tightly pressed in the top, the utility model has the advantages of improving equipment versatility and production efficiency, through adjustable bending device interval and positioning assembly, adapt to the bending demand of different size case sheet metal spare, reduce mould replacement frequency.

Description

Technical Field

[0001] This utility model belongs to the field of chassis processing technology, and in particular relates to a sheet metal bending machine for chassis production that is easy to adjust. Background Technology

[0002] In chassis manufacturing, sheet metal is widely used due to its advantages of light weight and high strength. The processing flow includes shearing, stamping, cutting, bending, welding, and splicing. Due to the diversity of chassis structural designs, sheet metal parts often need to be precisely bent to meet specific shape requirements, making the bending process a key step in production.

[0003] Traditional bending equipment applies force to sheet metal parts through the mechanical cooperation of the bending section and the bending groove to achieve bending and forming. While this method can reduce the impact load on the equipment during bending and extend its service life, it has significant technical drawbacks. Specifically, existing bending machines can only produce bent shapes at fixed angles. When product design changes require adjustments to the bending angle or shape, a special mold must be replaced, leading to increased mold inventory costs, extended production preparation time, and potential production line shutdowns. Furthermore, such equipment is only suitable for single-size sheet metal materials and cannot flexibly adjust the bending spacing and positioning parameters according to changes in sheet metal part dimensions. This results in a narrow range of applications and low efficiency when processing sheet metal parts of different sizes, making it difficult to meet the flexible manufacturing needs of modern chassis production, which involves multiple varieties and small batches. These problems not only increase production costs but also limit the versatility of the equipment. Therefore, there is an urgent need to design an easily adjustable sheet metal bending machine for chassis production to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide an easily adjustable sheet metal bending machine for chassis production. This invention offers advantages in improving equipment versatility and production efficiency. Through adjustable bending device spacing and positioning components, it adapts to the bending needs of sheet metal chassis of different sizes, reducing the frequency of mold changes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A sheet metal bending machine for easy-to-adjust chassis production includes a support frame. Two sets of bending devices are symmetrically arranged and slidably mounted on the top of the support frame via several adjusting guide rail pairs. A movable adjustment component is mounted on the support frame to adjust the distance between the two sets of bending devices. It also includes adjustable positioning components mounted at both ends of the support frame, with each set corresponding to one of the two sets of bending devices. Each bending device includes a sliding mounting base slidably connected to the support frame via adjusting guide rail pairs. An outer bending component is mounted at the outer end of the sliding mounting base for bending sheet metal parts. It also includes a pressure block assembly mounted on the sliding mounting base for pressing the sheet metal parts onto the outer bending component, and an inner bending component mounted on the sliding mounting base for pressing the bent portion of the sheet metal parts. The outer bending component includes a corner bend die pivotally connected to the sliding mounting base. The corner bend die has an L-shaped structure and includes a swing drive mechanism for driving the corner bend die to swing around the pivot end.

[0006] Preferably, the swing drive mechanism includes a folding mounting block fixed to the top edge of the sliding mounting base, a swing shaft mounted on the folding mounting block, a folding mold pivotally connected to the folding mounting block via the swing shaft, and a mounting slot on the folding mounting block for accommodating the swing of the folding mold; it also includes a cylinder pivot seat mounted at the tail end of the folding mounting block, and an outer folding cylinder pivotally connected between the cylinder pivot seat and the folding mold.

[0007] Preferably, the inner bending assembly includes a cylinder fixing seat mounted on a sliding mounting seat, an inner bending cylinder mounted on the cylinder fixing seat, an inner bending knife mounted on the extended end of the inner bending cylinder, and a plug groove opened on the sliding mounting seat, the lower end of the inner bending knife slidingly passing through the plug groove.

[0008] Preferably, the extended end of the inner bending cylinder points to the bending part of the bending die in the bending working state; the inner bending assembly also includes a blade plug installed at the extended end of the inner bending cylinder, a slot is provided on the blade plug, and a plug connector that is integrally formed at the inner end of the inner bending blade to engage with the slot, the plug connector has a convex structure and the lower end slides through the plug groove.

[0009] Preferably, the pressing block assembly includes a pressing cylinder mounted on a sliding mounting base, a pressing block seat mounted on the extended end of the pressing cylinder, and a pressing block mounted on the pressing block seat for pressing the sheet metal part onto the inner end face of the angled mounting block.

[0010] Preferably, the movable adjustment assembly includes a double-headed motor mounted on a bracket, with a first lead screw and a second lead screw of opposite rotation mounted on the two shaft ends of the double-headed motor, the first lead screw and the second lead screw being coaxially arranged and rotatably connected to the bracket; a movable support first is mounted on the first lead screw via a nut, and a movable support second is mounted on the second lead screw via a nut, the movable support first and the movable support second being connected to two sets of bending devices respectively.

[0011] Preferably, the adjustable positioning assembly includes a shaft fixing seat fixed to the end of the bracket, at least two sets of adjusting shafts fixed to the shaft fixing seat and arranged in parallel, a supporting slider sliding through the at least two sets of adjusting shafts, and a locking member installed on the supporting slider for locking the supporting slider and the at least two sets of supporting sliders.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model provides a sheet metal bending machine for chassis production that is easy to adjust. By setting a movable adjustment component that can adjust the distance between two sets of bending devices and an adjustable positioning component, the equipment can flexibly adapt to the processing needs of sheet metal parts of different sizes and specifications, solving the problem of poor applicability of traditional equipment. At the same time, the L-shaped bending die in the outer bending component can be driven by a swing drive mechanism to pivot and swing, realizing flexible adjustment of bending angle and shape, avoiding frequent die changes, thereby reducing production costs and improving the efficiency and flexibility of chassis production. Attached Figure Description

[0013] Figure 1 This is a top view of the structure of this utility model;

[0014] Figure 2 This is a three-dimensional structural diagram of the bending device in this utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of the movable adjustment component in this utility model;

[0016] Figure 4 This is a three-dimensional structural diagram of the adjustable positioning component in this utility model.

[0017] In the diagram: 1. Outer bending assembly; 1-1. Mounting slot; 1-2. Corner mounting block; 1-3. Swinging shaft; 1-4. Cornering die; 1-5. Outer cornering cylinder; 1-6. Cylinder pivot seat; 2. Adjustable positioning assembly; 2-1. Shaft fixing seat; 2-2. Adjusting shaft; 2-3. Locking component; 2-4. Supporting slider; 3. Adjusting guide rail pair; 4. Sliding mounting seat; 5. Inner bending assembly; 5-1. 5-2. Inner angle cylinder; 5-3. Cylinder barrel fixing seat; 5-4. Connector; 5-5. Inner bending knife; 5-6. Plug slide groove; 5-7. Knife plug; 6. Moving adjustment assembly; 6-1. Moving stand one; 6-2. Lead screw one; 6-3. Double-headed motor; 6-4. Moving stand two; 6-5. Lead screw two; 7. Pressing block assembly; 7-1. Pressing cylinder; 7-2. Pressing block seat; 7-3. Pressing block; 8. Support. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 This utility model discloses an easily adjustable sheet metal bending machine for chassis production, comprising a support frame 8. Two sets of bending devices are symmetrically arranged and slidably mounted on the top of the support frame 8 via several adjusting guide rail pairs 3. A movable adjustment component 6 is mounted on the support frame 8 to adjust the distance between the two sets of bending devices. It also includes adjustable positioning components 2 mounted at both ends of the support frame 8, with each set of adjustable positioning components 2 corresponding to one of the two sets of bending devices. Each bending device includes a sliding mounting base 4 slidably connected to the support frame 8 via adjusting guide rail pairs 3. An outer bending component 1 is mounted on the outer end of the sliding mounting base 4 for bending sheet metal parts. It also includes a pressure block component 7 mounted on the sliding mounting base 4 for pressing the sheet metal parts onto the outer bending component 1, and an inner bending component 5 mounted on the sliding mounting base 4 for clamping the bent portion of the sheet metal parts. Further details can be found in the attached document. Figure 2 The outer bending assembly 1 includes a bending die 1-4 pivotally connected to a sliding mounting base 4. The bending die 1-4 has an L-shaped structure and also includes a swing drive mechanism for driving the bending die 1-4 to swing around the pivot end.

[0020] The support frame 8 is the main load-bearing structure of the equipment, used to support and fix other functional components. It can be a welded steel frame to provide overall rigidity and stability. The adjusting guide rail pair 3 is a mechanism for achieving relative sliding connections between components, typically consisting of a guide rail and a slider, ensuring stability and accuracy during the sliding process. Specifically, the adjusting guide rail pair 3 includes a linear guide rail fixed to the top of the support frame 8 and a slider fixed to the bottom of the sliding mounting base 4, with the slider slidably connected to the linear guide rail.

[0021] like Figure 2 As shown, the swing drive mechanism includes a folded mounting block 1-2 fixed to the top edge of the sliding mounting base 4, a swing shaft 1-3 mounted on the folded mounting block 1-2, and a folded mold 1-4 pivotally connected to the folded mounting block 1-2 via the swing shaft 1-3. A mounting slot 1-1 is provided on the folded mounting block 1-2 to accommodate the swing of the folded mold 1-4. The mechanism also includes a cylinder pivot seat 1-6 mounted at the tail end of the folded mounting block 1-2, and an outer folding cylinder 1-5 pivotally connected between the cylinder pivot seat 1-6 and the folded mold 1-4.

[0022] The swing shaft 1-3 is a shaft-like component used to connect the angled mold 1-4 and the angled mounting block 1-2, allowing the angled mold 1-4 to pivot around it. As the pivot center of the angled mold 1-4, it ensures that the angled mold 1-4 can swing smoothly and accurately. For example, a cylindrical pin can be used, mounted in a corresponding hole via bearings or bushings to reduce friction and improve motion accuracy; or a threaded bolt shaft can be used, fixed with a nut, while shims or elastic elements are placed at the connection to absorb impact and adjust clearance.

[0023] The mounting slot 1-1 is an opening created on the corner mounting block 1-2 to accommodate the swing trajectory of the corner mold 1-4. Its function is to ensure that the corner mold 1-4 does not interfere with the corner mounting block 1-2 during swinging and to allow the corner mold 1-4 to achieve the required swing angle and range. This slot can be an arc-shaped slot, its shape matching the swing trajectory of the corner mold 1-4, precisely machined by milling or wire cutting; or it can be a rectangular or irregularly shaped slot, its size and position precisely calculated to maximize the swing space of the corner mold 1-4 while ensuring structural strength.

[0024] The external folding cylinder 1-5 is a linear drive device, typically a hydraulic or pneumatic cylinder, used to provide linear thrust or pull force to drive the folding mold 1-4 to oscillate. As the core actuator of the oscillating drive mechanism, it converts fluid pressure into mechanical motion, achieving precise control and drive of the folding mold 1-4. For example, a double-acting hydraulic cylinder can be used, powered by a hydraulic pump station, to achieve precise position control and a large driving force; or a double-acting pneumatic cylinder can be used, powered by an air source, offering advantages such as fast response and simple structure.

[0025] like Figure 2 As shown, the inner bending assembly 5 includes a cylinder fixing seat 5-2 mounted on the sliding mounting seat 4, an inner bending cylinder 5-1 mounted on the cylinder fixing seat 5-2, an inner bending blade 5-4 mounted on the extended end of the inner bending cylinder 5-1, and a plug groove 5-5 opened on the sliding mounting seat 4, the lower end of the inner bending blade 5-4 slidingly passing through the plug groove 5-5.

[0026] The inner bending assembly 5 is the core component used to clamp the bent section of the sheet metal part. Its overall structural design aims to achieve precise and stable bending operations. The sliding mounting base 4 serves as the mounting base for the inner bending assembly 5. It is slidably connected to the bracket 8 through the adjusting guide rail pair 3, providing movement and positioning functions for the entire bending device. The inner bending cylinder 5-1 is a linear drive device, usually a hydraulic cylinder or a pneumatic cylinder. Its function is to provide linear reciprocating motion, driving the inner bending cutter 5-4 to apply clamping force to the sheet metal part.

[0027] The internal bending cutter 5-4 is a tool component that directly contacts and bends sheet metal parts. Driven by the internal bending cylinder 5-1, it clamps the bending portion of the sheet metal part, assisting in completing precise bending. The internal bending cutter 5-4 can be made of high-strength alloy steel to ensure its wear resistance and high hardness; it can also be designed as a detachable structure to facilitate the replacement of different shaped or sized cutter heads according to different bending requirements. The plug groove 5-5 is a guide groove formed on the sliding mounting base 4. Its function is to provide sliding guidance for the lower end of the internal bending cutter 5-4, constraining its movement trajectory and preventing lateral deviation or wobbling. Therefore, when clamping the bending portion of the sheet metal part, the internal bending cutter 5-4 can maintain high positioning accuracy and stability, thereby significantly improving the bending quality and consistency of the sheet metal part, reducing the scrap rate, and increasing production efficiency.

[0028] like Figure 1 and Figure 2As shown, the extended end of the inner bending cylinder 5-1 points to the bending part of the bending die 1-4 in the bending working state; the inner bending assembly 5 also includes a blade plug 5-6 installed at the extended end of the inner bending cylinder 5-1, a slot is provided on the blade plug 5-6, and a plug connector 5-3 is integrally formed at the inner end of the inner bending blade 5-4 to engage with the slot. The plug connector 5-3 has a convex structure and its lower end slides through the plug groove 5-5.

[0029] Specifically, the extended end of the inner bending cylinder 5-1 points towards the bent portion of the bending die 1-4 in the bending operation state. This technical feature aims to ensure that when the inner bending assembly 5 performs the bending operation, its core functional component can be precisely aligned with the predetermined bending area of ​​the sheet metal part, namely the bent portion of the bending die 1-4. This directional accuracy ensures the accurate application of the bending force and is key to achieving high-precision bending. One implementation method is to calibrate the installation position and angle of the inner bending cylinder 5-1 through precise mechanical design and assembly, so that the end of its extension stroke naturally aligns with the bent portion of the bending die 1-4. This can be achieved by adjusting the geometry of the mounting base, using adjustable mounting brackets or shims. Another implementation method is to combine sensors and control systems. For example, position sensors or vision recognition systems can be placed near the extended end of the inner bending cylinder 5-1 or the bent portion of the bending die 1-4 to monitor the relative position between them in real time, and the extended position of the inner bending cylinder 5-1 can be finely adjusted through a servo control system to ensure precise pointing.

[0030] Furthermore, the internal bending assembly 5 also includes a tool plug 5-6 installed at the protruding end of the internal bending cylinder 5-1. The tool plug 5-6 is an important component of the internal bending assembly 5, its function being to provide a quick-installation and disassembly interface for the internal bending blade 5-4. By installing the tool plug 5-6 at the protruding end of the internal bending cylinder 5-1, a modular connection between the internal bending blade 5-4 and the drive mechanism is achieved, facilitating the replacement of internal bending blades 5-4 of different specifications or shapes. The tool plug 5-6 can be a one-piece structure, directly machined into the piston rod end of the internal bending cylinder 5-1, or securely fixed to the piston rod end by threads, pins, or other means. Additionally, the connector 5-3 is an important component of the internal bending blade 5-4, forming a mating fit with the slot on the tool plug 5-6 to achieve the connection between the internal bending blade 5-4 and the internal bending cylinder 5-1.

[0031] Through the above settings, the positioning accuracy and connection stability of the inner bending assembly 5 are significantly improved. The extended end of the inner bending cylinder 5-1 is precisely aligned with the bending part of the bending die 1-4, ensuring accurate application of bending force and effectively solving the problem of bending position deviation affecting accuracy. Simultaneously, the cooperation of the tool plug 5-6, the integrally formed convex-shaped connector 5-3, and the plug groove 5-5 not only provides a stable and reliable connection, effectively preventing the inner bending tool 5-4 from loosening or falling off during operation, but also greatly simplifies the installation and replacement process of the inner bending tool 5-4, improving operational convenience and equipment applicability. This effectively solves the problems of insufficient stability and ease of disassembly in the inner bending tool connection method, leading to inconvenience in operation or difficulty in tool replacement.

[0032] like Figure 2 As shown, the pressing block assembly 7 includes a pressing cylinder 7-1 mounted on a sliding mounting base 4, a pressing block seat 7-2 mounted on the extended end of the pressing cylinder 7-1, and a pressing block 7-3 mounted on the pressing block seat 7-2 for pressing the sheet metal part onto the inner end face of the angled mounting block 1-2.

[0033] The pressure block assembly 7 is a mechanism used to apply vertical pressure to sheet metal parts during sheet metal bending, firmly fixing them in the bending position. Its function is to ensure that the sheet metal parts do not shift, warp, or deform during bending, thereby guaranteeing bending accuracy and quality. Besides the structure of this application consisting of a pressing cylinder 7-1, a pressure block seat 7-2, and a pressure block 7-3, the pressure block assembly 7 can also employ a cam-driven clamping device or a flexible clamping device that achieves clamping through airbag expansion. The pressing cylinder 7-1 can be a single-acting pneumatic or hydraulic cylinder, extending by unidirectional air or oil supply and returning to its original position by spring or gravity; it can also be a double-acting pneumatic or hydraulic cylinder, extending and retracting by bidirectional air or oil supply, providing more precise control; or it can be an electric linear actuator, achieving linear motion through a motor-driven screw and nut mechanism, possessing high precision and programmability.

[0034] The pressure block 7-3 is a component that directly contacts and applies pressure to the sheet metal part. Its function is to evenly distribute the force provided by the pressing cylinder 7-1 onto the surface of the sheet metal part, preventing it from slipping or warping during bending. The pressure block 7-3 is typically made of wear-resistant, high-hardness materials, such as tool steel, alloy steel, or polyurethane, to prevent damage to the sheet metal surface. Its contact surface can be designed to be flat, curved, or have a specific texture to accommodate sheet metal parts of different shapes and materials and to increase friction. The corner mounting block 1-2 serves as a support surface when the sheet metal part is clamped. Together with the pressure block 7-3, it forms a clamping structure for the sheet metal part, ensuring its positioning and fixation in the bending area. The corner mounting block 1-2 is typically made of high-strength steel, and its inner end face is precision-machined to provide a flat and wear-resistant support surface.

[0035] like Figure 3 As shown, the movable adjustment assembly 6 includes a double-headed motor 6-3 mounted on a bracket 8. Two lead screws, 6-2 and 6-5, with opposite rotation directions, are mounted on the two shaft ends of the double-headed motor 6-3. The lead screws 6-2 and 6-5 are coaxially arranged and rotatably connected to the bracket 8. A movable support 6-1 is mounted on the lead screw 6-2 via a nut, and a movable support 6-4 is mounted on the lead screw 6-5 via a nut. The movable supports 6-1 and 6-4 are respectively connected to two sets of bending devices.

[0036] The dual-head motor 6-3 is an electric motor with two output shafts, whose two shafts can output power independently or synchronously. This motor is typically used in applications requiring the simultaneous driving of two independent loads or the achievement of synchronous reverse motion. Its function is to provide a centralized and synchronous power source to drive subsequent transmission mechanisms. Lead screws 6-2 and 6-5 are mechanical transmission elements used to convert rotary motion into linear motion. When the dual-head motor 6-3 drives them to rotate, the thread direction of one lead screw causes its mating nut to move in one direction, while the thread direction of the other lead screw causes its mating nut to move in the opposite direction.

[0037] Specifically, the dual-head motor 6-3, acting as a centralized power source, can simultaneously drive both shaft ends, ensuring high efficiency in the adjustment process. Since lead screws 6-2 and 6-5 are designed with opposite rotation directions, when the dual-head motor 6-3 drives them to rotate synchronously, lead screw 6-2 moves the movable stand 6-1 in one direction, while lead screw 6-5 moves the movable stand 6-4 in the opposite direction. This design allows the two bending devices to move inward or outward synchronously at the same speed, thereby precisely adjusting the distance between them and avoiding positional deviations in the bending devices caused by asynchronous adjustments.

[0038] like Figure 4 As shown, the adjustable positioning assembly 2 includes a shaft fixing seat 2-1 fixed to the end of the bracket 8, at least two sets of adjusting shafts 2-2 arranged in parallel fixed to the shaft fixing seat 2-1, a supporting slider 2-4 slidably passing through the at least two sets of adjusting shafts 2-2, and a locking member 2-3 installed on the supporting slider 2-4 for locking the supporting slider 2-4 and the at least two sets of supporting sliders 2-4.

[0039] The support slider 2-4 has an L-shaped structure and slides along at least two sets of adjusting shafts 2-2. The L-shaped structure of the support slider 2-4 allows it to simultaneously contact and support the bottom and sides of the sheet metal part, thus providing more stable and precise positioning. The support slider 2-4 can be made of engineering plastics with self-lubricating properties, such as ultra-high molecular weight polyethylene or polyoxymethylene, to reduce sliding friction; it can also be made of metal materials such as aluminum alloy or steel, with internal linear bearings or sliding bushings to ensure smooth and gapless sliding. A locking element 2-3 is installed on the support slider 2-4 to lock the support slider 2-4 and at least two sets of adjusting shafts 2-2. The locking element 2-3 can take various forms; for example, it can be a knob-type locking element that achieves friction locking by tightening bolts, a quick-locking mechanism that achieves rapid clamping using an eccentric cam or lever principle, or a positive locking method using a pin inserted into a positioning hole. Its core function is that once the supporting slider 2-4 is adjusted to the required position, the locking part 2-3 can firmly fix it on the adjusting shaft 2-2 to prevent positional displacement due to vibration or force during bending.

[0040] This embodiment achieves precise, stable, and repeatable positioning of sheet metal parts through the refined adjustable positioning component 2 structure, effectively solving the problems of insufficient stability of adjustment and locking and low positioning accuracy in the prior art, thereby ensuring the quality and consistency of bending processing.

[0041] like Figure 2 As shown, a hinged ear plate is fixed to the back of the pivot part of the angle bending mold 1-4, and the extended end of the outer angle bending cylinder 1-5 is pivotally connected to the hinged ear plate through a Y-type joint and a pin; when the extended end of the outer angle bending cylinder 1-5 is in the maximum retracted state, the free end of the angle bending mold 1-4 does not cross the inner end face of the angle bending mounting block 1-2.

[0042] This design enhances the overall structural strength of the connection and effectively disperses the local stress exerted by the outer angle-bending cylinder 1-5 on the angle-bending mold 1-4, thereby improving the stability of the angle-bending mold 1-4 during the oscillation process. One implementation method is to firmly fix the hinge plate to the back of the pivot part of the angle-bending mold 1-4 through high-strength welding or bolting, ensuring that it will not loosen or deform during long-term, high-frequency oscillation operations. Another implementation method is that the hinge plate and the pivot part of the angle-bending mold 1-4 can be integrally cast or machined to eliminate the connection interface, further improving the rigidity and durability of the connection.

[0043] like Figure 2 As shown, the pressing cylinder 7-1 is installed on the bottom surface of the sliding mounting base 4, and the pressing block seat 7-2 passes through the accommodating groove opened on the sliding mounting base 4; the pressing cylinder 7-1 adopts a double-rod linear drive component.

[0044] Specifically, the pressing cylinder 7-1, as the core driving component of the pressing block assembly 7, is responsible for providing pressing force, and its main body is cleverly mounted on the bottom surface of the sliding mounting base 4. This mounting method allows the cylinder body of the pressing cylinder 7-1 to be directly fixed to the bottom plane of the sliding mounting base 4 using fasteners such as bolts and screws, or a mounting groove or bracket can be pre-reserved at the bottom of the sliding mounting base 4, with the pressing cylinder 7-1 connected to the mounting groove or bracket via snap-fits, pins, or other means. This design aims to optimize the spatial layout and avoid interference between the pressing cylinder 7-1 and other components above the sliding mounting base 4, such as the outer bending assembly 1 and the inner bending assembly 5, making the entire bending device more compact.

[0045] Furthermore, the pressing cylinder 7-1 employs a dual-rod linear drive. A dual-rod linear drive refers to a hydraulic or pneumatic cylinder with two piston rods, typically arranged symmetrically and extending and retracting synchronously. For example, a dual-piston-rod pneumatic cylinder can be used, driving the two piston rods to extend or retract synchronously via pneumatic pressure, thereby causing the pressure block seat 7-2 to move linearly; alternatively, a dual-piston-rod hydraulic cylinder can be used, driving the two piston rods to extend and retract synchronously via hydraulic oil, providing greater thrust and higher precision. Compared to a single-rod drive, a dual-rod drive, while providing thrust, can better resist lateral forces and provide more stable linear motion.

[0046] Overall, this solution addresses the issues of space occupancy and uneven force distribution by optimizing the installation position and driving method of the pressing cylinder 7-1, thereby improving the stability and efficiency of sheet metal bending.

[0047] like Figure 3 As shown, two through slots are provided on the top of the bracket 8 for the movable support 1 6-1 and the movable support 2 6-4 to pass through.

[0048] As the core support structure of the entire sheet metal bending machine, the top of the bracket 8 is typically designed as a flat or specifically shaped area to support and connect other functional components, ensuring the overall stability and structural integrity of the equipment. This top can be formed from thick steel plates through welding or integrally molded from cast aluminum alloy to meet the required strength and rigidity. Through slots refer to through holes or narrow openings formed in the top of the bracket 8. These through slots can be formed in various ways. For example, openings of the required size and shape can be precisely machined into the top material of the bracket 8 using milling or laser cutting processes. This method is suitable for various metal materials and ensures high machining accuracy. Alternatively, if the bracket 8 is manufactured through mass production methods such as casting or stamping, the through slots can be pre-reserved during the mold design stage and integrally formed with the bracket 8.

[0049] Working principle:

[0050] When processing sheet metal parts of different widths, the operator can adjust the distance between the two sets of bending devices by moving the adjustment component 6. Specifically, when the dual-head motor 6-3 starts, lead screws 6-2 and 6-5 rotate synchronously in opposite directions, driving moving supports 6-1 and 6-4 to move in opposite directions, thereby precisely adjusting the distance between the two sets of bending devices to accommodate the bending requirements of sheet metal parts of different widths. Before bending the sheet metal parts, the operator uses the adjustable positioning component 2 to precisely position the sheet metal parts. The adjustable positioning component 2 is installed at both ends of the bracket 8 and corresponds to the two sets of bending devices. By adjusting and locking the position of the supporting slider 2-4, stable support and positioning can be provided for sheet metal parts of different sizes, avoiding the positioning inaccuracies caused by size mismatches in traditional bending machines.

[0051] When the outer bending cylinder 1-5 extends or retracts, it drives the bending die 1-4 to swing within the mounting slot 1-1, achieving bending at different angles. When the extended end of the outer bending cylinder 1-5 is in its maximum retracted state, the free end of the bending die 1-4 does not cross the inner end face of the bending mounting block 1-2, ensuring safety and positioning space before bending. During the bending process, the pressure block assembly 7 firmly presses the sheet metal part onto the outer bending assembly 1, preventing displacement of the sheet metal part during bending. At the same time, the inner bending assembly 5 is used to press the bent part of the sheet metal part. When the inner bending cylinder 5-1 extends, the inner bending blade 5-4 presses the bent part of the sheet metal part, cooperating with the bending die 1-4 of the outer bending assembly 1 to complete the precise bending operation.

[0052] In actual operation, this bending machine can flexibly adapt to sheet metal parts of different specifications through the movable adjustment component 6 and the adjustable positioning component 2, solving the problem of poor applicability of traditional equipment. Simultaneously, the outer bending component 1 and the inner bending component 5 achieve bending at different angles through an adjustable drive mechanism, eliminating the need to change molds and significantly reducing production costs and time. The various technical features of this overall solution work together to form a highly efficient, flexible, and easily adjustable sheet metal bending system, greatly improving the efficiency and versatility of chassis production.

Claims

1. A sheet metal bending machine for chassis production that is easy to adjust, characterized in that: The system includes a bracket (8), on which two sets of symmetrically arranged bending devices are slidably mounted via several adjusting guide rail pairs (3) on the top of the bracket (8). A movable adjustment component (6) is mounted on the bracket (8) to adjust the distance between the two sets of bending devices. It also includes adjustable positioning components (2) mounted at both ends of the bracket (8), with each set of adjustable positioning components (2) corresponding to one of the two sets of bending devices. The bending device includes a sliding mounting base (4) slidably connected to the bracket (8) via adjusting guide rail pairs (3). An outer bending assembly (1) is installed at the outer end for bending sheet metal parts; it also includes a pressure block assembly (7) installed on the sliding mounting base (4) for pressing the sheet metal parts onto the outer bending assembly (1), and an inner bending assembly (5) installed on the sliding mounting base (4) for pressing the bent portion of the sheet metal parts; the outer bending assembly (1) includes a corner bend die (1-4) pivotally connected on the sliding mounting base (4), the corner bend die (1-4) having an L-shaped structure, and a swing drive mechanism for driving the corner bend die (1-4) to swing around the pivot end.

2. The easily adjustable sheet metal bending machine for chassis production as described in claim 1, characterized in that: The swing drive mechanism includes a folded mounting block (1-2) fixed to the top edge of the sliding mounting base (4), a swing shaft (1-3) mounted on the folded mounting block (1-2), a folded mold (1-4) pivotally connected to the folded mounting block (1-2) through the swing shaft (1-3), and a mounting slot (1-1) for accommodating the swing of the folded mold (1-4) is provided on the folded mounting block (1-2); it also includes a cylinder pivot seat (1-6) mounted at the tail end of the folded mounting block (1-2), and an outer folded cylinder (1-5) pivotally connected between the cylinder pivot seat (1-6) and the folded mold (1-4).

3. The easily adjustable sheet metal bending machine for chassis production as described in claim 1, characterized in that: The inner bending assembly (5) includes a cylinder fixing seat (5-2) mounted on a sliding mounting seat (4), an inner bending cylinder (5-1) mounted on the cylinder fixing seat (5-2), an inner bending knife (5-4) mounted on the extended end of the inner bending cylinder (5-1), and a plug groove (5-5) opened on the sliding mounting seat (4), the lower end of the inner bending knife (5-4) slidingly passing through the plug groove (5-5).

4. The easily adjustable sheet metal bending machine for chassis production as described in claim 3, characterized in that: The extended end of the inner bending cylinder (5-1) points to the bending part of the bending die (1-4) in the bending working state; the inner bending assembly (5) also includes a tool plug (5-6) installed at the extended end of the inner bending cylinder (5-1), a slot is provided on the tool plug (5-6), and a plug connector (5-3) that is inserted into the slot is integrally formed at the inner end of the inner bending knife (5-4). The plug connector (5-3) has a convex structure and its lower end slides through the plug groove (5-5).

5. The easily adjustable sheet metal bending machine for chassis production as described in claim 2, characterized in that: The pressing block assembly (7) includes a pressing cylinder (7-1) mounted on a sliding mounting base (4), a pressing block seat (7-2) mounted on the extended end of the pressing cylinder (7-1), and a pressing block (7-3) mounted on the pressing block seat (7-2) for pressing the sheet metal part onto the inner end face of the angled mounting block (1-2).

6. The easily adjustable sheet metal bending machine for chassis production as described in claim 1, characterized in that: The movable adjustment assembly (6) includes a double-headed motor (6-3) mounted on a bracket (8). Two screws with opposite rotation directions, screw one (6-2) and screw two (6-5), are respectively mounted on the two shaft ends of the double-headed motor (6-3). Screw one (6-2) and screw two (6-5) are coaxially arranged and rotatably connected to the bracket (8). A movable stand one (6-1) is mounted on screw one (6-2) through a screw nut, and a movable stand two (6-4) is mounted on screw two (6-5) through a screw nut. Movable stand one (6-1) and movable stand two (6-4) are respectively connected to two sets of bending devices.

7. The easily adjustable sheet metal bending machine for chassis production as described in claim 1, characterized in that: The adjustable positioning assembly (2) includes a shaft fixing seat (2-1) fixed to the end of the bracket (8), at least two sets of adjusting shafts (2-2) arranged in parallel fixed to the shaft fixing seat (2-1), a supporting slider (2-4) slidably passing through the at least two sets of adjusting shafts (2-2), and a locking member (2-3) installed on the supporting slider (2-4) for locking the supporting slider (2-4) and the at least two sets of supporting sliders (2-4).

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