Cutting-off device and cutting-off method for high-strength complex-section cavity product

Abstract

The invention provides a high-strength complex-section cavity product cutting device which comprises a height adjusting mechanism, a radian adjusting mechanism, a follow-up mechanism and a cutting unit which are sequentially arranged from bottom to top. The cutting-off unit comprises a vertical cutting-off mechanism used for cutting off material belts on the two sides of the cavity product and a horizontal cutting-off mechanism used for cutting off a reinforcing rib structure in the middle of the cavity product. The invention further provides a cutting-off method which comprises the following steps: pre-punching and cutting off a process hole in advance in a material belt before rolling forming, and integrally cutting off a cavity product by adopting a regional secondary cutting-off mode after rolling forming. Follow-up continuous cutting of high-strength complex section type cavity products can be achieved on a rolling line, the cutting efficiency is high, the quality is good, the product rework rate is greatly reduced, and the service life of a cutter is remarkably prolonged; the device is flexible to use and high in universality, and can be adapted to cold-bending profiles with various different section types through replacement of the standard cutting head.

Description

Technical Field

[0001] The present invention relates to the technical field of roll-formed profiles, and particularly relates to a cutting device and a cutting method for high-strength complex cross-section cavity products. Background Art

[0002] With the rapid development of automotive technology, vehicle lightweighting and overall vehicle performance optimization have become important goals. To achieve these goals, the application of high-strength steel (such as with a tensile strength above 1500 MPa) in automotive parts has gradually increased, such as components like bumper beams, door sill parts, and frame cross members. These parts are usually produced by roll-forming processes to meet the requirements of high strength and lightweight for vehicles. To further increase the structural strength, the structural shapes have become more complex, for example, bumper beams adopt "day" - shaped, "eye" - shaped, and multi - cavity structures. The combination of high - strength steel and complex structural shapes makes the cutting process more difficult. Traditional cutting methods have many problems when dealing with high - strength steel.

[0003] Firstly, traditional cutting methods are prone to cause cutting deformation, affecting the dimensional accuracy and assembly quality of parts. Secondly, defects such as burrs, edge tearing, and cutting cracks are easily generated during the cutting process, and the edge is uneven, affecting the surface quality of parts and subsequent processing. In addition, the high strength and hardness of high - strength steel lead to increased tool wear, and the service life of traditional tools is significantly shortened. For example, when a conventional cutting tool continuously punches high - strength steel bumper beam products, it usually needs to be sharpened or scrapped and replaced after punching about 150 pieces. Frequent tool replacement not only increases production costs but also reduces production efficiency. Given the high strength and high hardness characteristics of high - strength steel, traditional cutting methods are difficult to meet the requirements of modern automotive part production.

[0004] Therefore, enterprises are urgently required to develop a new type of cutting device and cutting method that can not only meet the requirements of cutting quality but also extend the service life of cutting tools to improve production efficiency and reduce production costs.

[0005] Chinese Patent CN202410769388.5 discloses a multifunctional cutting device capable of cutting roll forming components in different directions, relating to the technical field of roll forming line cutting equipment. It includes: a base with a cutting height adjustment unit and a horizontal displacement mechanism; a cutting platform linked to the horizontal displacement mechanism, for detachable assembly with a sawing device, a top and bottom material cutting device, a transverse material cutting device, or a directional offset cutting device; a sawing device for performing a rotary cutting action on a positioned workpiece at an inclined angle; a top and bottom material cutting device for performing a unidirectional linear cutting action on a positioned workpiece in a vertical direction; a transverse material cutting device for performing a unidirectional linear cutting action on a positioned workpiece in a transverse direction; and a directional offset cutting device for performing an offset cutting action on a positioned workpiece at a set angle. This invention can perform four different cutting operations, increasing the applicability to various workpieces, i.e., it can perform cutting operations on multiple workpieces. However, this cutting equipment failed to solve the problems of cutting end face quality and cutter life for complex cross-section high-strength steel (above 1500MPa); secondly, the base platform of this equipment has no angle adjustment function, requiring a composite angle adjustment function in the standard cutting unit, which increases the equipment investment cost and results in poor equipment commensurability and compatibility; the lifting device of this cutting equipment has no rigid locking, making it prone to wear and aging. Summary of the Invention

[0006] To address the aforementioned problems in the existing technology, the present invention aims to provide a cutting device and cutting method for high-strength complex cross-sectional cavity products.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A cutting device for a high-strength complex cross-sectional cavity product includes a height adjustment mechanism, an arc adjustment mechanism, a follow-up mechanism, and a cutting unit arranged sequentially from bottom to top. The cutting unit includes a vertical cutting mechanism for cutting the material strips on both sides of the cavity product and a horizontal cutting mechanism for cutting the reinforcing rib structure in the middle of the cavity product. The height adjustment mechanism includes a cutting device base plate and a height adjustment base plate set on the cutting device base plate; a height adjustment servo motor with an upward power output direction is installed in the center of the height adjustment base plate, the power output shaft of the height adjustment servo motor is connected to the height adjustment screw, and the height adjustment screw is threadedly fitted with the arc adjustment base plate of the arc adjustment mechanism and can drive the arc adjustment base plate to rise and fall. The arc adjustment mechanism includes an arc adjustment base plate and an arc adjustment cylinder assembly; the arc adjustment cylinder assembly includes a lifting cylinder and hinge brackets respectively disposed at the upper and lower ends of the lifting cylinder to meet the requirements of angle adjustment; the lower hinge bracket is fixedly installed on the height adjustment base plate, and the upper hinge bracket is fixedly connected to the follow-up base plate; the discharge side of the arc adjustment base plate is provided with a clearance hole for the arc adjustment cylinder assembly; The follower mechanism includes a follower base plate and a tool holder mounting base plate. A linear guide rail is symmetrically arranged on both sides of the follower base plate along its length. The tool holder mounting base plate is mounted on the two linear guide rails, and the tool holder mounting base plate reciprocates linearly along the guide rails under the drive of a follower servo motor. The vertical cutting mechanism and the horizontal cutting mechanism are sequentially mounted on the tool holder mounting base plate. superior .

[0008] A further improvement of the present invention is that: multiple set screw assemblies for adjusting the left and right positions of the base plate are provided on both sides of the long side of the base plate of the cutting device along the length direction.

[0009] A further improvement of the present invention is that a guide post and guide sleeve assembly for lifting and lowering is provided between the height adjustment base plate and the curvature adjustment base plate; the height position of the curvature adjustment base plate is locked and fixed by a height adjustment fixing plate.

[0010] A further improvement of the present invention is that: the arc adjustment mechanism further includes an arc adjustment fixing plate for position locking; the arc adjustment fixing plate is an arc-shaped plate, the bottom of which is fixed on the arc adjustment base plate, and the upper part of which is locked in place with the mounting hole on the side of the follower base plate; the feed end of the arc adjustment base plate is also provided with multiple sets of hinged support structures for adjusting the angle.

[0011] A further improvement of the present invention is that the power output end of the follower servo motor is connected to the transmission shaft via a coupling, and the transmission shaft is connected to the tool holder mounting base plate via a follower bushing.

[0012] A further improvement of the present invention is that: the horizontal cutting mechanism includes a horizontal cutting mold frame, and a horizontal cutting stationary knife is installed inside the horizontal cutting mold frame; a horizontal cutting moving knife driven by a horizontal cutting cylinder is also provided on one side of the horizontal cutting mold frame; a clamping cylinder for clamping the product is also provided at the upper end of the horizontal cutting mold frame.

[0013] A further improvement of the present invention is that the vertical cutting mechanism includes a vertical cutting mold frame, and a vertical cutting stationary blade and a vertical cutting moving blade are installed in the vertical cutting mold frame for cooperation, and the vertical cutting moving blade is connected to the piston rod of the vertical cutting cylinder for transmission.

[0014] A cutting method involves pre-punching cutting process holes in the strip material before roll forming, and then using a two-stage cutting method in different areas after roll forming. First, a vertical cutting mechanism is used to cut the strip material on both sides of the product part, and then a horizontal cutting mechanism is used to cut the strip material in the middle reinforcing rib part of the product part, thereby achieving the overall cutting of complex cross-section cavity products.

[0015] A further improvement of the present invention lies in that: the positions of the pre-punched holes are the planar positions of the upper and lower surfaces and the middle rib of the cross-section of the product part.

[0016] A further improvement of the present invention lies in that: the distance between the edge of the cutting process hole and the roll bending fillet is ≥5 mm.

[0017] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows: The present invention provides a cutting device for high-strength complex cross-section cavity products, which can cut high-strength and complex-structured cavity products. After cutting, it does not affect the cross-section of the cavity product, and the cutting part is smooth without burrs, greatly reducing the product rework rate. It is especially suitable for cutting the complex "day" - shaped structure of ultra-high-strength steel, meeting the requirements of modern automotive parts for high strength and lightweight. The cutting device of the present invention is installed downstream of the roll forming unit, and realizes follow-up continuous cutting on the roll forming line, ensuring the continuity and high efficiency of the production process, and avoiding the problem of low production efficiency caused by frequent start and stop of equipment in the traditional cutting method. Secondly, by improving the cutting quality and die life, the present invention reduces the scrap rate and tool replacement cost caused by cutting defects, thereby reducing the overall production cost.

[0018] The device of the present invention has functions of left - right position, up - down height and angle adjustment, and can be adapted to cold - formed profiles with various different cross - sections for use, including closed parts and open parts, with flexible application and strong versatility. The device of the present invention can realize the cutting of profiles with different cross - sections only by combining various forms of standard cutting heads, such as vertical cutting heads, horizontal cutting heads, rotary sawing, offset cutting heads, etc.; the device of the present invention adopts a standard switching head structure, with simple structure, low cost, and can be batch - processed, realizing the flexible selection and replacement of various cutting heads.

[0019] Compared with the prior art, the cutting device of the present invention can simultaneously realize functions of height adjustment, follow - up horizontal movement, spatial angle adjustment and lateral horizontal movement, and has wide applicability; the angle adjustment of the present invention controls the stroke of the arc adjustment oil cylinder through a proportional valve, and can realize automatic angle adjustment, with convenient angle adjustment and reduced labor intensity of operators; the height adjustment and angle adjustment mechanisms of the present invention are both provided with mechanical locking, enhancing the structural strength and stiffness, reducing the load of servo motors and oil cylinders, and extending the service life of the equipment.

[0020] Through the combined design of a vertical cutting mechanism and a horizontal cutting mechanism, the present invention realizes the efficient cutting of complex cross - section cavity products, such as the complex "day" - shaped structure of ultra - high - strength steel. The vertical cutting mechanism first cuts the two ends of the product part, and then the horizontal cutting mechanism cuts the middle reinforcing rib structure. The two maintain the same cutting speed, ensuring the continuity and high efficiency of the cutting process and significantly improving the production efficiency.

[0021] The segmented cutting method employed in this invention effectively ensures the high quality of the cut parts. The cut parts are free of deformation and burrs, exhibiting excellent surface quality. This cutting method effectively avoids defects common in traditional cutting methods, such as burrs, edge tearing, and cracks, significantly improving cutting quality and reducing the product rework rate from 95% to below 60%.

[0022] The cutting device of this invention significantly reduces tool wear and greatly improves the service life of the cutting die by optimizing the cutting process. Compared with traditional cutting methods, the tool life of the device of this invention is increased from 500-1000 pieces to more than 2500 pieces, which significantly reduces the frequency of tool replacement, lowers production costs, and improves production efficiency.

[0023] This invention also provides a method for cutting high-strength, complex cross-sectional cavity products. Combined with a pre-punching process, cutting process holes are pre-punched on the upper and lower surfaces of the cross-section before roll forming. This process ensures the structural strength of the product during continuous roll forming, preventing deformation and cracking, while also reducing wear on the cutting blade and lowering the cutting difficulty. This method is particularly suitable for cutting large-sized, high-strength, and complex cross-sectional products, further improving cutting efficiency and quality.

[0024] In summary, this invention not only improves cutting quality and extends mold life, but also reduces production costs and increases production efficiency, demonstrating broad application prospects and significant economic benefits. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the cutting device of the present invention; Figure 2 This is a schematic diagram of the height adjustment mechanism of the present invention; Figure 3 This is a schematic diagram of the arc adjustment mechanism of the present invention; Figure 4 This is a schematic diagram of the follower mechanism of the present invention; Figure 5 This is a schematic diagram of the horizontal cutting mechanism of the present invention; Figure 6 This is a schematic diagram of the vertical cutting mechanism of the present invention; Figure 7 Schematic diagram of the pre-punching position of the cutting process hole; Figure 8 A schematic diagram of the cutting method of the present invention; Figure 9 A schematic diagram of the first-order cutting of the present invention, with the cutting portion marked in red; Figure 10 A schematic diagram of the second-order cutting of the present invention, with the cutting portion marked in red; Figure 11 This is a schematic diagram of the second composite cutting method of the present invention; Figure 12 This is a schematic diagram of the third composite cutting method of the present invention; In the diagram, 1 is the product part; 1-1 is the cutting process hole for the central rib; 1-2 is the cutting process hole for the upper surface of the left cavity; 1-3 is the cutting process hole for the lower surface of the left cavity; 1-4 is the cutting process hole for the lower surface of the right cavity; and 1-5 is the cutting process hole for the upper surface of the right cavity. 2. Height Adjustment Mechanism; 2-1. Cutting Device Base Plate; 2-2. Set Screw; 2-3. Set Screw Mounting Base; 2-4. Height Adjustment Base Plate; 2-5. Height Adjustment Fixing Plate; 2-6. Guide Post; 2-8. Height Adjustment Servo Motor; 2-9. Height Adjustment Screw; 2-10. Height Adjustment Bushing; 2-11. Base Crossbeam; 2-12. Guide Post Mounting Base. 3. Curvature adjustment mechanism; 3-1. Curvature adjustment base plate; 3-2. Lower hinge support; 3-3. Trunnion; 3-4. Upper hinge support; 3-5. Curvature adjustment fixing plate; 3-6. Curvature adjustment cylinder assembly. 4. Follower mechanism; 4-1. Follower base plate; 4-2. Follower base plate; 4-3. Guide rail; 4-4. Slider; 4-5. Follower servo motor; 4-6. Motor mounting base; 4-7. Coupling; 4-8. Tail end support; 4-9. Drive shaft; 4-10. Follower connecting block; 4-11. Follower bushing; 4-12. Tool holder mounting base plate; 4-13. End support. 5. Horizontal cutting mechanism; 5-1. Clamping cylinder; 5-2. Horizontal cutting cylinder; 5-3. Horizontal cutting die frame; 5-4. Horizontal cutting stationary blade; 5-5. Horizontal cutting moving blade. 6. Vertical cutting mechanism; 6-1. Vertical cutting cylinder; 6-2. Vertical cutting mold frame; 6-3. Vertical cutting moving knife; 6-4. Vertical cutting stationary knife. Detailed Implementation

[0026] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] A cutting device for high-strength, complex cross-sectional cavity products, see [link / reference]. Figure 1The device includes, from bottom to top, a height adjustment mechanism 2, an arc adjustment mechanism 3, a follow-up mechanism 4, and a cutting unit. The height adjustment mechanism 2, located at the bottom of the device, adjusts the discharge height of the product part 1 and its center position. The arc adjustment mechanism 3 adjusts the discharge angle of the product part 1 to ensure smooth passage without scratching its appearance. The follow-up mechanism 4, controlled by a servo motor, moves at the same speed as the product part 1 to ensure cutting efficiency. The cutting unit is used to cut the product part 1. Specifically, the cutting unit includes a horizontal cutting mechanism 5 and a vertical cutting mechanism 6. These two mechanisms combine to form a composite cutting process. The vertical cutting mechanism 6 cuts both sides of the product part 1, while the horizontal cutting mechanism 5 cuts the central reinforcing rib. Both mechanisms cut at the same speed, ensuring the continuity and efficiency of the cutting process and significantly improving production efficiency.

[0028] The height adjustment mechanism 2, see [link / reference] Figures 1-3 It includes a cutting device base plate 2-1, a top screw 2-2, a top screw mounting base 2-3, a height adjustment base plate 2-4, a height adjustment fixing plate 2-5, a guide post 2-6, a height adjustment servo motor 2-8, a height adjustment lead screw 2-9, a height adjustment bushing 2-10, a base beam 2-11, and a guide post mounting base 2-12.

[0029] The base plate 2-1 of the cutting device is the bottommost component of the entire cutting device. It is a rectangular plate structure and is placed on the workshop floor to achieve overall leveling of the device. A height-adjustable base plate 2-4 is provided on the base plate 2-1. The height-adjustable base plate 2-4 is a rectangular plate with a width smaller than that of the base plate 2-1. Multiple elongated holes for fixing screws are evenly distributed along the length of both sides of its long side. The height-adjustable base plate 2-4 and the base plate 2-1 are fixedly connected by screws passing through the elongated holes. Multiple set screw assemblies for adjusting the left and right positions of the height-adjustable base plate 2-4 are also provided along the length of both sides of the long side of the base plate 2-1. The set screw assembly includes a set screw mounting base 2-3 and a set screw 2-2 mounted on the set screw mounting base 2-3. The set screw mounting base 2-3 is fixedly mounted on the base plate 2-1 of the cutting device. After the set screw 2-2 passes through the set screw mounting base 2-3, its front end abuts and presses against the height adjustment base plate 2-4. By adjusting the positions of the set screws 2-2 on both sides and pushing the lateral displacement of the height adjustment base plate 2-4, the center position of the product part 1 can be found.

[0030] See Figure 2A height adjustment servo motor 2-8 is mounted in the center of the height adjustment base plate 2-4. The power output shaft of the height adjustment servo motor 2-8 is connected to the height adjustment screw 2-9. The height adjustment screw 2-9 is threadedly engaged with the height adjustment bushing 2-10, which is fixedly connected to the arc adjustment base plate 3-1 of the arc adjustment mechanism 3. Driven by the height adjustment servo motor 2-8, the arc adjustment base plate 3-1 can be raised or lowered via the height adjustment screw 2-9, thereby adjusting the overall height of the equipment to suit the output position of product part 1.

[0031] A guide post and guide sleeve assembly for lifting and lowering is also provided between the height-adjusting base plate 2-4 and the curvature-adjusting base plate 3-1. Specifically, a guide post mounting base 2-12 is provided at each of the four corners of the height-adjusting base plate 2-4. Adjacent guide post mounting bases 2-12 are connected by a base beam 2-11 to form a rectangular cage frame structure, stabilizing the entire device. A vertically upward guide post 2-6 is installed inside the guide post mounting base 2-12, and the guide post 2-6 vertically penetrates the curvature-adjusting base plate 3-1. A guide sleeve that mates with the guide post 2-6 is installed in the guide hole of the curvature-adjusting base plate 3-1. Through the sliding engagement of the guide post and the guide sleeve, the curvature-adjusting base plate 3-1 is ensured to be evenly stressed at the four corners and to rise and fall smoothly and horizontally. A height adjustment fixing plate 2-5 is provided on the operating side of the guide post mounting base 2-12. The upper end of the height adjustment fixing plate 2-5 is fixedly connected to the arc adjustment base plate 3-1 of the arc adjustment mechanism 3, and its lower end is fixed to the guide post 2-6 mounting base by screws. Specifically, the lower part of the height adjustment fixing plate 2-5 is provided with a U-shaped groove along the height direction, and a locking screw for fixing the height of the guide post 2-6 is provided in the U-shaped groove; the length of the U-shaped groove is the height adjustment range of the cutting device. In this embodiment, there are two U-shaped grooves, symmetrically arranged on the left and right sides along the center line. When adjusting the height, the locking screws are loosened; the height adjustment servo motor 2-8 drives the height adjustment screw 2-9, drives the arc adjustment base plate 3-1 and other working mechanisms to rise and fall to the center height of the product part 1, and then the screws of the U-shaped grooves are tightened again to fix the cutting height of the cutting device.

[0032] In addition, in order to improve the support strength of the height adjustment fixing plate 2-5, the operating side of the height adjustment fixing plate 2-5 is also provided with an outwardly extending reinforcing wing plate, and the reinforcing wing plate and the height adjustment fixing plate 2-5 are arranged in a T-shape.

[0033] The arc adjustment mechanism 3, such as Figure 2 , 3 As shown in Figure 4, it includes an arc adjustment base plate 3-1, a lower hinge support 3-2, a trunnion 3-3, an upper hinge support 3-4, an arc adjustment fixing plate 3-5, and an arc adjustment cylinder assembly 3-6.

[0034] The arc adjustment base plate 3-1 is positioned above the height adjustment base plate 2-4 and can drive the follower mechanism 4 and the cutting unit to rise and fall. The feed end of the arc adjustment base plate 3-1 has three sets of hinged support structures arranged side-by-side for changing and adjusting the cutting angle. Each set of hinged support structures includes a lower hinge support 3-2 and an upper hinge support 3-4. The upper hinge support 3-4 and the lower hinge support 3-2 are connected by a trunnion 3-3. The lower hinge support 3-2 is fixedly installed on the arc adjustment base plate 3-1, and the upper hinge support 3-4 is fixedly connected to the follower base plate 4-1.

[0035] A height adjustment bushing 2-10 is installed at the center of the arc adjustment base plate 3-1. A height adjustment screw 2-9 passes upward through the arc adjustment base plate 3-1 and engages with the height adjustment bushing 2-10 via a thread, thereby rotating the arc adjustment base plate 3-1 to raise or lower it. An arc adjustment fixing plate 3-5 is provided on both sides of the discharge end of the arc adjustment base plate 3-1. The arc adjustment fixing plate 3-5 is an arc-shaped plate with its center pointing towards the feed end. The bottom of the arc adjustment fixing plate 3-5 is fixed to the arc adjustment base plate 3-1, and an arc-shaped elongated hole is provided on the plate for locking after angle adjustment. The arc-shaped elongated hole mates with the mounting hole on the side of the follower base plate 4-1 and is locked with screws, thus fixing the arc adjustment fixing plate 3-5 to the follower base plate 4-1.

[0036] In addition, in order to improve the support strength of the curvature adjustment fixing plate 3-5, the operating side of the curvature adjustment fixing plate 3-5 is also provided with an outwardly extending reinforcing wing plate, and the reinforcing wing plate and the curvature adjustment fixing plate 3-5 are arranged in a T-shape.

[0037] The discharge side of the arc adjustment base plate 3-1 is provided with a clearance hole for the arc adjustment cylinder assembly 3-6. The arc adjustment cylinder assembly 3-6 passes through the clearance hole and is fixedly connected to the follower base plate 4-1 of the follower mechanism 4. The arc adjustment cylinder assembly 3-6 is the power component for realizing arc adjustment, including a lifting cylinder and hinge brackets respectively set at the upper and lower ends of the lifting cylinder to meet the needs of the arc adjustment mechanism 3 to adjust a certain angle. The lower hinge bracket is fixedly installed on the height adjustment base plate 2-4, and the upper hinge bracket is fixedly connected to the follower base plate 4-1. When the center position of the cutting mechanism is adjusted and fixed, that is, the height of the arc adjustment base plate 3-1 remains unchanged, the discharge angle of the product is adjusted by extending or shortening the arc adjustment cylinder. When the discharge angle is fixed, the screws of the arc adjustment fixing plate 3-5 are locked onto the follower base plate 4-1.

[0038] It should be noted that this embodiment uses an arc adjustment cylinder assembly for angle adjustment. In actual use, a cylinder assembly can also be used for driving. The more convenient method can be selected according to the power equipment settings of the plant.

[0039] The follower mechanism 4, such as Figure 4 As shown, it includes a follower base plate 4-1, a guide rail mounting seat 4-2, a linear guide rail 4-3, a slider 4-4, a follower servo motor 4-5, a motor mounting seat 4-6, a coupling 4-7, a tail end support seat 4-8, a transmission shaft 4-9, a follower connecting block 4-10, a follower bushing 4-11, a tool holder mounting base plate 4-12, and an end support seat 4-13.

[0040] A linear guide rail 4-3 is symmetrically arranged on both sides of the follower base plate 4-1 along its length. The linear guide rail 4-3 is fixedly mounted on the follower base plate 4-1 via guide rail mounting base 4-2. Two sliders 4-4 are provided on each linear guide rail 4-3. The follower servo motor 4-5 is fixedly mounted on the discharge end of the follower base plate 4-1. The power output end of the follower servo motor 4-5 is connected to the transmission shaft 4-9 via coupling 4-7. To ensure horizontal transmission of the transmission shaft 4-9, support seats are provided at both the front and rear ends of the transmission shaft 4-9. Specifically, an end support seat 4-13 is provided at the feed end of the follower base plate 4-1, and a tail support seat 4-8 is provided at the front end of the coupling 4-7.

[0041] The drive shaft 4-9 is equipped with a follower sleeve 4-11, which is connected to the tool holder mounting base plate 4-12 via a follower connecting block 4-10 (the tool holder mounting base plate 4-12 is shown in a half-sectional view in the figure). A cutting unit is installed on the upper surface of the tool holder mounting base plate 4-12. The tool holder mounting base plate 4-12 is also fixedly connected to the sliders 4-4 on both sides. When the follower servo motor 4-5 is working, it drives the drive shaft 4-9, thereby driving the tool holder mounting base plate 4-12 to move, causing it to reciprocate linearly along the linear guide rail 4-3.

[0042] The horizontal cutting mechanism 5, such as Figure 5 As shown, it includes a clamping cylinder 5-1, a horizontal cutting cylinder 5-2, a horizontal cutting mold frame 5-3, a horizontal cutting stationary blade 5-4, and a horizontal cutting moving blade 5-5.

[0043] The horizontal cutting mold frame 5-3, through which product part 1 passes, is mounted on the tool holder mounting base plate 4-12 of the follower mechanism 4. A horizontal cutting stationary blade 5-4 is installed inside the horizontal cutting mold frame 5-3. The horizontal cutting stationary blade 5-4 has a through groove structure that matches the shape of product part 1 and is used for positioning and passing through it. A clamping cylinder 5-1 is located at the upper end of the horizontal cutting mold frame 5-3. The piston rod of the clamping cylinder 5-1 is connected downwards to a pressure block. The clamping cylinder 5-1 drives the pressure block to descend and transmits pressure to clamp and fix product part 1 to the horizontal cutting stationary blade 5-4. A horizontal cutting cylinder 5-2 is also located on one side of the horizontal cutting mold frame 5-3. The power output end of the horizontal cutting cylinder 5-2 is fixedly connected to a horizontal cutting moving blade 5-5. When product part 1 is clamped, the horizontal cutting cylinder 5-2 drives the horizontal cutting moving blade 5-5 to push forward, achieving cutting.

[0044] The vertical cutting mechanism 6, such as Figure 6 As shown, the system includes a vertical cutting cylinder 6-1, a vertical cutting mold frame 6-2, a vertical cutting moving blade 6-3, and a vertical cutting stationary blade 6-4. The vertical cutting mold frame 6-2 is mounted on the blade holder mounting base plate 4-12 of the follower mechanism 4 and is located at the front end of the horizontal cutting mold frame 5-3. The vertical cutting stationary blade 6-4 and the vertical cutting moving blade 6-3 are installed within the vertical cutting mold frame 6-2, with the stationary blade 6-4 fixedly mounted at the bottom of the frame and having a through-hole structure that matches the shape of the product part 1. A vertical cutting cylinder 6-1 is located at the upper end of the vertical cutting mold frame 6-2. The piston rod of the cylinder 6-1 extends downward and is connected to the vertical cutting moving blade 6-3, driving the blade downward to achieve cutting.

[0045] It should be noted that the through-slot structure of the horizontal cutting stationary blade 5-4 and the through-hole structure of the vertical cutting stationary blade 6-4 are both designed according to the cross-sectional shape of product part 1. The position and number of the cutting edges of the horizontal cutting moving blade 5-5 and the vertical cutting moving blade 6-3 are determined according to the position and number of parts to be cut. By changing the horizontal cutting moving blade 5-5, the horizontal cutting stationary blade 5-4, the vertical cutting moving blade 6-3, and the vertical cutting stationary blade 6-4, cutting of product parts 1 with different cross-sectional shapes can be achieved.

[0046] In this embodiment, the horizontal cutting blade 5-5 has one cutting edge (see...). Figure 10 The vertical cutting blade 6-3 has two blades (see...). Figure 9 ).

[0047] In addition, both the horizontal and vertical cutting mold frames are standard frame structures and are not specified in detail here.

[0048] In order to reduce the overall weight of the equipment, multiple weight-reducing holes are provided on the height-adjusting bottom plate 2-4, the arc-adjusting bottom plate 3-1, and the follower bottom plate 4-1. The positions and sizes of the weight-reducing holes are not specifically defined.

[0049] Generally, the horizontal cutting mechanism 5 is usually installed on the discharge side of the vertical cutting mechanism 6, and its specific installation can be adjusted according to the specific dimensions and conveying conditions of the product part 1. The following are included but not limited to the following methods: (1) Refer to Figure 1 , the horizontal cutting mechanism 5 and the vertical cutting mechanism 6 are arranged adjacent to each other side by side on a tool holder mounting bottom plate, and the tool holder mounting bottom plate is adjusted in position under the drive of the follower servo motor 4-5; after the product part 1 is cut at the left and right sides by the vertical cutting mechanism 6, it directly enters the horizontal cutting mechanism 5 for cutting the middle position of the product part 1.

[0050] (2) Refer to Figure 11 , the horizontal cutting mechanism 5 and the vertical cutting mechanism 6 are arranged side by side on a tool holder mounting bottom plate, but there is a certain distance between the two cutting mechanisms, and this distance is the cutting length of the product part 1; after the product part 1 is cut at the left and right sides by the vertical cutting mechanism 6, it is conveyed through a cutting distance and then the middle position of the product part 1 is cut.

[0051] (3) Refer to Figure 12 , the follower mechanism 4 is provided with two follower servo motors 4-5 and two tool holder mounting bottom plates 4-12 to achieve independent drive of each tool holder mounting bottom plate 4-12; the vertical cutting mechanism 6 and the horizontal cutting mechanism 5 are respectively fixedly installed on a tool holder mounting bottom plate 4-12, and the distance between the two mechanisms can be adjusted at any time according to the requirements of the product part 1.

[0052] A cutting method for a high-strength complex cross-section cavity product adopts a secondary cutting method in different regions. First, the vertical cutting mechanism is used to complete the cutting of the two side strips of the product part, and then the horizontal cutting mechanism is used to cut the strip of the middle reinforcing rib part of the product part, so as to achieve the overall cutting of the complex cross-section cavity product.

[0053] The cutting method of the present invention realizes the efficient cutting of high-strength complex cross-section cavity products, such as ultra-high-strength steel complex "day" - shaped structure product parts; ensures that the cut parts are free of deformation and burrs and have excellent surface quality. Moreover, this method adopts a cutting method of cooperating a moving tool and a stationary tool, which can significantly reduce the wear of the tool and the replacement frequency of the tool, greatly improve the service life of the cutting die, reduce the production cost, and improve the production efficiency.

[0054] It should be noted that when using the cutting method of the present invention, it is necessary to pre-punch cutting process holes in the strip in advance before roll forming. The positions of the pre-punched holes are distributed on the upper and lower surfaces of the cross-section of the product part and the flat part of the middle rib, avoiding the roll bending part. That is, before roll forming, pre-punched holes are made at the cutting position according to the cutting length of the product part, and then after roll forming, the bent connection part between the cutting process holes is cut by the cutting mechanism of the present invention, thus realizing the segmentation of the product part.

[0055] Taking the cutting of a complex "day" - shaped structure of ultra - high - strength steel as an example, as shown in Figure 7 The cutting process holes include: middle rib cutting process hole 1 - 1, upper - surface cutting process hole 1 - 2 of the left cavity, lower - surface cutting process hole 1 - 3 of the left cavity, lower - surface cutting process hole 1 - 4 of the right cavity, and upper - surface cutting process hole 1 - 5 of the right cavity. The positions of the cutting process holes are all at the flat positions of the product part, and it is required that the distance from the fillet to the edge of the cutting hole is ≥5 mm, so as to ensure the structural strength during continuous roll forming, avoid hole deformation and cracking, and at the same time reduce the wear of the cutting tool and the cutting difficulty.

[0056] As shown in Figure 9 、 Figure 10 When cutting the "day" - shaped cross - section cavity product, first, the vertical cutting mechanism (6) cuts the strip on both sides of the product part (1), that is, cuts the connection parts between the upper - surface cutting process hole 1 - 2 of the left cavity and the lower - surface cutting process hole 1 - 3 of the left cavity, and between the lower - surface cutting process hole 1 - 4 of the right cavity and the upper - surface cutting process hole 1 - 5 of the right cavity, as shown in the marked - red parts in Figure 9 ; then, the horizontal cutting mechanism (5) cuts the strip of the middle reinforcing rib part of the product part (1), that is, cuts the connection part around the middle rib cutting process hole 1 - 1, as shown in the marked - red parts in Figure 10 ; thus, the overall cutting of the complex cross - section cavity product is realized. When cutting the middle reinforcing rib part, the horizontal cutting moving tool (5 - 5) inserts into the gap cut by the vertical cutting mechanism (6) and advances to the reinforcing rib part for cutting.

[0057] According to the specific requirements of the product part (1) and the different structures of the cutting mechanisms used, the cutting method of the present invention includes the following three specific implementation methods: Method 1: Use the cutting mechanism as shown in Figure 1 Adopt single - servo - motor control, and arrange the vertical cutting mechanism and the horizontal cutting mechanism adjacent to each other, which saves the device space and reduces the device manufacturing cost; however, the electric control program is complex, and the cumulative error is relatively large, and a high - performance servo motor is required to ensure the switching - length accuracy of the product part.

[0058] The specific cutting process is as follows: The composite cutting mechanism follows the product part. First, the vertical cutting mechanism completes the cutting of the first cutting position of the material strip on both sides of the product part. At this time, the horizontal cutting mechanism does not move. Then, the vertical cutting mechanism returns to the origin, follows and tracks the first cutting position, aligns with the horizontal cutting mechanism and moves at the same speed. When the length of the product part reaches the specified length, the middle reinforcing rib of the product part is cut. After the second cutting, the horizontal cutting mechanism immediately returns to the origin, follows and tracks the position of the previous uncut hole, aligns with the vertical cutting mechanism and moves at the same speed. After the speed stabilizes, the first waste material is removed, thus completing one cutting cycle.

[0059] This method is suitable for parts with insufficient factory space and short product length.

[0060] Method 2: Use such as Figure 11 The cutting mechanism shown employs a single servo motor control, with the vertical and horizontal cutting mechanisms positioned at a distance equal to the length of one product piece. This method features a simple control program and high cutting speed.

[0061] The specific cutting process is as follows: the composite cutting mechanism follows the product part, the vertical cutting mechanism on the feeding side cuts off the material strips at both ends of the product part, and the horizontal cutting mechanism cuts the middle reinforcing rib structure. The two cut at the same speed, which ensures the continuity and efficiency of the cutting process and significantly improves production efficiency.

[0062] This method is suitable for products where factory space is not limited, product length is controllable, and high cutting precision is required.

[0063] Method 3: Using, for example Figure 12 The cutting mechanism shown employs dual servo motor control, with the vertical and horizontal cutting mechanisms positioned adjacent to each other. This saves space, reduces manufacturing costs, and simplifies the control program, but increases electrical control costs.

[0064] The vertical cutting mechanism and the horizontal cutting mechanism are respectively installed on two tool holder mounting base plates. Each cutting mechanism is controlled by an independent servo motor. The vertical cutting mechanism independently completes the tracking and cutting of the pre-punched process hole, while the horizontal cutting mechanism independently completes the tracking and switching of the process hole after one cutting.

[0065] This method is suitable for parts with insufficient factory space, short product length, and high cutting accuracy requirements.

[0066] The two-stage, zone-based cutting method of this invention significantly reduces tool wear and replacement frequency, lowers production costs, and greatly improves the service life and production efficiency of cutting dies. Using this cutting method, the cutting deformation of product parts can be controlled within ±1mm, burrs within ±0.3mm, and tearing occurs. The rework rate of product parts is reduced from 95% to below 60%, and tool life is increased from 500-1000 pieces to over 2500 pieces, extending service life by 2-5 times, demonstrating significant effectiveness.

[0067] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A cutting device for high-strength complex cross-sectional cavity products, characterized in that: It includes a height adjustment mechanism (2), an arc adjustment mechanism (3), a follow-up mechanism (4) and a cutting unit arranged from bottom to top. The cutting unit includes a vertical cutting mechanism (6) for cutting the material strips on both sides of the cavity product and a horizontal cutting mechanism (5) for cutting the middle reinforcing rib structure of the cavity product. The height adjustment mechanism (2) includes a cutting device base plate (2-1) and a height adjustment base plate (2-4) set on the cutting device base plate (2-1); a height adjustment servo motor (2-8) with upward power output is installed in the center of the height adjustment base plate (2-4), and the power output shaft of the height adjustment servo motor (2-8) is connected to the height adjustment screw (2-9) for transmission. The height adjustment screw (2-9) is threadedly fitted with the arc adjustment base plate (3-1) of the arc adjustment mechanism (3) and can drive the arc adjustment base plate (3-1) to rise and fall. The arc adjustment mechanism (3) includes an arc adjustment base plate (3-1) and an arc adjustment cylinder assembly (3-6); the arc adjustment cylinder assembly (3-6) includes a lifting cylinder and hinge brackets respectively set at the upper and lower ends of the lifting cylinder to meet the requirements of angle adjustment; the lower hinge bracket is fixedly installed on the height adjustment base plate (2-4), and the upper hinge bracket is fixedly connected to the follow-up base plate (4-1); the discharge side of the arc adjustment base plate (3-1) is provided with a clearance hole for the arc adjustment cylinder assembly (3-6); The follower mechanism (4) includes a follower base plate (4-1) and a tool holder mounting base plate (4-12); a linear guide rail (4-3) is symmetrically arranged on both sides of the follower base plate (4-1) along the length direction, and a tool holder mounting base plate (4-12) is provided on the two linear guide rails (4-3). The tool holder mounting base plate (4-12) moves linearly back and forth along the guide rail under the drive of the follower servo motor (4-5); the vertical cutting mechanism (6) and the horizontal cutting mechanism (5) are installed on the tool holder mounting base plate (4-12) in sequence.

2. The cutting device for high-strength complex cross-sectional cavity products according to claim 1, characterized in that: On both sides of the long side of the base plate (2-1) of the cutting device, there are also multiple set screw assemblies for adjusting the left and right positions of the height adjustment base plate (2-4) along the length direction.

3. The cutting device for high-strength complex cross-sectional cavity products according to claim 2, characterized in that: A guide post and guide sleeve assembly for lifting and lowering is also provided between the height adjustment base plate (2-4) and the curvature adjustment base plate (3-1); the height position of the curvature adjustment base plate (3-1) is locked and fixed by the height adjustment fixing plate (2-5).

4. The cutting device for high-strength complex cross-sectional cavity products according to claim 2, characterized in that: The arc adjustment mechanism (3) also includes an arc adjustment fixing plate (3-5) for position locking; the arc adjustment fixing plate (3-5) is an arc plate, the bottom of which is fixed on the arc adjustment base plate (3-1), and the upper part of which is locked in place with the mounting hole on the side of the follower base plate (4-1); the feed end of the arc adjustment base plate (3-1) is also provided with multiple sets of hinge support structures for adjusting the angle.

5. The cutting device for high-strength complex cross-sectional cavity products according to claim 4, characterized in that: The power output end of the follow-up servo motor (4-5) is connected to the transmission shaft (4-9) through the coupling (4-7), and the transmission shaft (4-9) is connected to the tool holder mounting base plate (4-12) through the follow-up bushing (4-11).

6. The cutting device for high-strength complex cross-sectional cavity products according to claim 1, characterized in that: The horizontal cutting mechanism (5) includes a horizontal cutting mold frame (5-3), and a horizontal cutting stationary knife (5-4) is installed inside the horizontal cutting mold frame (5-3); a horizontal cutting moving knife (5-5) driven by a horizontal cutting cylinder (5-2) is also provided on one side of the horizontal cutting mold frame (5-3); a clamping cylinder (5-1) for clamping the product part (1) is also provided at the upper end of the horizontal cutting mold frame (5-3).

7. The cutting device for high-strength complex cross-sectional cavity products according to claim 1, characterized in that: The vertical cutting mechanism (6) includes a vertical cutting mold frame (6-2), in which a vertical cutting stationary blade (6-4) and a vertical cutting moving blade (6-3) are installed for use. The vertical cutting moving blade (6-3) is connected to the piston rod of the vertical cutting cylinder (6-1) for transmission.

8. A cutting method using the cutting device according to any one of claims 1 to 7, characterized in that: Before roll forming, the strip is pre-punched with cutting process holes. After roll forming, a two-stage cutting method is adopted. First, the strips on both sides of the product are cut by a vertical cutting mechanism, and then the strips in the middle reinforcing rib part of the product are cut by a horizontal cutting mechanism, thereby realizing the overall cutting of complex cross-section cavity products.

9. The cutting method according to claim 8, characterized in that: The pre-punching positions are the planar positions of the upper and lower surfaces and the middle rib of the product part's cross-section.

10. The cutting method according to claim 9, characterized in that: The distance between the edge of the cutting process hole and the rounded corner of the roller bend is ≥5mm.

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