Cutting edge adjustable hydraulic gantry shear and using method

Abstract

The invention discloses a hydraulic gantry shear with an adjustable cutting edge and a using method, and relates to the field of steel shearing equipment, and the hydraulic gantry shear comprises a table body, a brake cutting module, a supporting module, a pressing block, a conveying module and a reduction gearbox. A hydraulic cylinder is assembled on the gantry structure of the table body to drive the brake-cutting module and the pressing block to move; the brake cutting module is provided with an external knife switch, an internal knife switch and a lifting knife switch, and the lifting knife switch can adjust the cutting edge form of the internal knife switch; the supporting module comprises a fixed supporting table and a lifting supporting table capable of lifting, and can adapt to different knife switch forms. According to the equipment, strip-shaped and plate-shaped steel shearing can be completed without disassembling and assembling parts by switching the cutting edge state of the brake blade and the structure of the supporting table, the plate-shaped steel adopts a segmented tooth-shaped shearing mode, the shearing efficiency is improved, and the operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel cutting equipment, in particular to a blade opening adjustable hydraulic gantry shear and a using method thereof. BACKGROUND

[0002] The hydraulic gantry shear is a commonly used cutting equipment in the field of metal material processing and waste steel recycling. It generates shear force by hydraulic drive and is widely used in cutting processing operations of various steels.

[0003] In waste steel recycling, waste steel needs to be cut into small pieces for smelting and recycling, and the smelting furnace has limitations on the size of the input steel. At present, the existing hydraulic gantry shears on the market mostly adopt fixed structure of the cutting knife and the supporting table. When cutting waste steel, for plate-shaped steel, the traditional equipment can only cut the plate-shaped steel into strips, and multiple cutting operations are required to cut the plate-shaped steel into small pieces for smelting and recycling.

[0004] Disadvantages

[0005] Poor equipment adaptability, the existing hydraulic gantry shear has a fixed integrated structure, and the blade opening shape cannot be adjusted. This structure cannot meet the requirement of cutting plate-shaped steel into small pieces at one time, and the cutting knife needs to be disassembled or replaced with a different type of cutting device when processing profiles, which is a complicated operation process and has a higher cost. Low cutting efficiency for plate-shaped steel, the existing equipment needs multiple cutting operations for plate-shaped steel, which increases the operation steps and prolongs the processing time. SUMMARY

[0006] In order to make up for the above shortcomings, the present application provides a blade opening adjustable hydraulic gantry shear and a using method thereof, aiming to improve the above problems.

[0007] In order to achieve the above purpose, the present application adopts the following technical scheme: a blade opening adjustable hydraulic gantry shear, comprising a table body, a cutting module, a supporting module and a pressing block.

[0008] Further, a hydraulic cylinder one is installed on the table body, the hydraulic cylinder one drives the cutting module to move up and down, the hydraulic cylinder one drives the pressing block to move up and down, the supporting module is fixedly connected with the table body, the supporting module is arranged below the cutting module, and the supporting module cooperates with the cutting module.

[0009] Furthermore: the gate cutting module includes an external gate, an internal gate, and a lifting gate. The bottom of the internal gate is provided with a downward-opening mounting groove. The bottom of the internal gate is divided into multiple gate blades by the mounting groove. The bottom of each gate blade is provided with an inclined cutting edge one, a cutting edge two, and a cutting edge three. The lifting gate is slidably connected to the mounting groove. The bottom of the lifting gate is provided with an inclined cutting edge four. The upper surface of the lifting gate is fixedly connected to a pushing component. The pushing component drives the lifting gate to move up and down in the mounting groove. The outer gate is fixedly connected to the outer surface of the internal gate.

[0010] Furthermore: the support module includes a fixed support platform and a lifting support platform. The fixed support platform is fixedly connected to the platform body. The outer side of the fixed support platform coincides with the inner side of the internal guillotine. The lifting support platform is slidably connected to the fixed support platform. A pushing component is connected to the bottom of the lifting support platform. The pushing component drives the lifting support platform to move up and down.

[0011] Furthermore: the upper surface of the internal gate is provided with a through stepped mounting hole 1, the position of the mounting hole 1 corresponds to the mounting groove, a hydraulic cylinder 3 is installed in the mounting hole 1, the output end of the hydraulic cylinder 3 faces downward, and the output end of the hydraulic cylinder 3 is fixedly connected to the upper surface of the lifting gate.

[0012] Furthermore: a second hydraulic cylinder is installed at the bottom of the platform, with the output end of the second hydraulic cylinder facing upwards, and a second mounting hole is provided at the bottom of the lifting support platform, with the bottom of the second mounting hole fixedly connected to the output end of the second hydraulic cylinder.

[0013] Furthermore: both sides of the mounting groove are provided with guide grooves II, and both sides of the lifting gate are provided with guide sliders II. The lifting gate is slidably connected to the internal gate through the guide sliders II and the guide grooves II.

[0014] Furthermore: the inner side of the platform (1) is provided with a guide groove, the two sides of the internal gate are provided with guide sliders, and the gate cutting module is slidably connected to the platform through the guide sliders and the guide groove; the two sides of the clamping block are provided with guide sliders, and the clamping block is slidably connected to the platform through the guide sliders and the guide groove.

[0015] Furthermore, it also includes a conveying module, which includes a conveyor belt, a first drive shaft, a second drive shaft, and a transmission gear. The first drive shaft and the second drive shaft are rotatably connected to the platform. Transmission gears are fixedly connected to both the first drive shaft and the second drive shaft. The transmission gears mesh with the conveyor belt for transmission. The head of the second drive shaft extends to the side of the platform and is connected to a power source.

[0016] Furthermore, the blades of the external switch, internal switch, and lifting switch are all equipped with alloy blades.

[0017] A method of using an adjustable-blade hydraulic gantry shear, characterized by comprising the following steps:

[0018] A1. When it is necessary to cut strip steel or cut plate steel into strips, hydraulic cylinder two retracts, lifting support platform descends, and hydraulic cylinder three drives lifting gate to move down to be aligned with the cutting edge of the internal gate.

[0019] A2. Place the steel on the conveyor belt;

[0020] A3. The power source outputs power, the second drive shaft rotates, the second drive shaft drives the drive gear to rotate, and the drive gear drives the conveyor belt to transport the steel to the gate position.

[0021] A4. Once the steel reaches its designated position, the power source will stop outputting power.

[0022] A5. When the hydraulic cylinder of the clamping block pushes the clamping block downward, the clamping block clamps the steel.

[0023] A6. The hydraulic cylinder of the gate cutting module pushes the gate cutting module down, and the gate cutting module and the support module work together to cut the plate.

[0024] A7. As the hydraulic cylinder retracts, it drives the gate-cutting module to move upward.

[0025] A8. As the hydraulic cylinder retracts, it causes the clamping block to move upward.

[0026] A9. Repeat operations A3 to A8 until the gate cutting process is completed.

[0027] A method of using an adjustable-blade hydraulic gantry shear, characterized by comprising the following steps:

[0028] B1. When it is necessary to cut the plate steel into small pieces, the second hydraulic cylinder outputs power, and the second hydraulic cylinder drives the lifting support platform to rise to be flush with the fixed support block. The third hydraulic cylinder retracts, so that the lifting gate moves upward to the highest point in the mounting slot.

[0029] B2. Place the steel on the conveyor belt;

[0030] B3. The power source outputs power, the second drive shaft rotates, the second drive shaft drives the drive gear to rotate, and the drive gear drives the conveyor belt to transport the steel to the gate position.

[0031] B4. Once the steel reaches its designated position, the power source will stop outputting power.

[0032] When the B5 hydraulic cylinder outputs power, it pushes the clamping block downward, and the clamping block clamps the steel.

[0033] B6. The hydraulic cylinder pushes the gate cutting module to move down. Under the joint action of the gate cutting module and the support module, the internal gate of the gate cutting module cuts off the internal gate cutting area from the plate steel along the internal gate cutting line, and the external gate cuts off the external gate cutting area from the plate steel along the external gate cutting line.

[0034] B7. As the hydraulic cylinder retracts, it drives the gate-cutting module to move upward.

[0035] B8. When the hydraulic cylinder retracts, it causes the clamping block to move upward.

[0036] B9. Repeat the operations from B3 to B8 until the gate cutting process is completed.

[0037] The present invention has the following beneficial effects:

[0038] To improve equipment adaptability and reduce operating costs, the hydraulic cylinder drives the lifting gate to move up and down, allowing for flexible switching between the integral or three-section gate blade shape. Combined with a liftable support platform, it can handle both strip steel cutting and plate steel cutting without disassembling the gate, significantly reducing equipment downtime and manual adjustment time. Furthermore, it improves plate steel cutting efficiency and simplifies the operation process. For plate steel, a segmented toothed shearing mode is adopted, allowing processing to be completed with a single positioning and multiple cuts, eliminating the need for repeated adjustments to the steel position, simplifying the operation steps and improving the overall cutting efficiency of plate steel. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the present invention;

[0040] Figure 2 This is the front view of the present invention;

[0041] Figure 3 for Figure 2 A sectional view of section AA;

[0042] Figure 4 for Figure 3 Enlarged view of section A;

[0043] Figure 5 for Figure 2 A sectional view of section BB;

[0044] Figure 6 for Figure 5 Enlarged view of section B;

[0045] Figure 7 for Figure 5 Enlarged view of section C;

[0046] Figure 8This is a cross-sectional view of the structure of the present invention;

[0047] Figure 9 for Figure 8 Enlarged view of section D;

[0048] Figure 10 This is a schematic diagram of the conveying module.

[0049] Figure 11 for Figure 10 Enlarged view of section E in the middle;

[0050] Figure 12 This is a sectional view of the gearbox;

[0051] Figure 13 This is an exploded view of the gate-off module.

[0052] Figure 14 This is a front view of the present invention after removing the external gate blade when cutting strip steel or cutting plate steel into strips;

[0053] Figure 15 This is a front view of the steel plate gate after the external gate blades are removed when the steel plate is cut into blocks according to the present invention;

[0054] Figure 16 This is a schematic diagram of the working state of the present invention after conveying plate-shaped steel and removing the external switch.

[0055] Figure 17 for Figure 16 Enlarged view of section F in the middle;

[0056] Figure 18 This is a schematic diagram illustrating the working state of the clamping block of the present invention clamping and fixing the plate steel.

[0057] Figure 19 This is a schematic diagram of the working state of the first gate cutting of plate steel according to the present invention;

[0058] Figure 20 This is a schematic diagram illustrating the working state of the present invention, in which the plate steel is conveyed again to the gate cutting position.

[0059] Figure 21 This is a schematic diagram illustrating the working state of the present invention when the plate steel is cut off again;

[0060] Figure 22 This is a bottom view of the gate cutting module and support module for removing the external gate blade when cutting plate steel into blocks according to the present invention;

[0061] Figure 23 for Figure 22 Enlarged view of section M;

[0062] Figure 24This is a bottom view of the gate cutting module and support module for removing the external gate blade when cutting plate steel into strips according to the present invention;

[0063] Figure 25 for Figure 24 Enlarged view of section N;

[0064] Figure 26 This is a schematic diagram showing the working state of the plate steel in the cutting position when it needs to be cut into strips.

[0065] Figure 27 A bottom view of the structure for cutting plate steel into strips by removing the external switch knife and the support module;

[0066] Figure 28 This is a schematic diagram of the gate cutting module and support module for removing the external gate blade when cutting plate steel into blocks according to the present invention;

[0067] Figure 29 This is a schematic diagram illustrating the working state of the present invention, in which plate steel is transported to the gate cutting position;

[0068] Figure 30 A schematic diagram of the working state of the gate cutting module and support module performing the first gate cutting of the plate steel after removing the external gate;

[0069] Figure 31 A schematic diagram showing the working state of the gate-cutting module and support module completing the first gate-cutting of the plate steel in order to remove the external gate.

[0070] Figure 32 This is a schematic diagram illustrating the working state of the present invention, in which the plate steel after the first gate cutting is transported to the gate cutting position;

[0071] Figure 33 This diagram illustrates the working state of the internal gate and support module cutting the plate steel during the second gate cutting operation.

[0072] Figure 34 This diagram illustrates the working state of the external gate and support module cutting the plate steel during the second gate cutting operation.

[0073] Figure 35 A schematic diagram showing the working state of the gate-cutting module and the support module completing the second gate-cutting of the plate-shaped part;

[0074] Figure 36 This is a schematic diagram of the process for cutting off plate steel.

[0075] Legend:

[0076] 1. Platform; 11. Hydraulic Cylinder 1; 12. Guide Groove 1; 13. Hydraulic Cylinder 2; 2. Gate Cutting Module; 21. External Gate Knife; 22. Internal Gate Knife; 221. Mounting Hole 1; 222. Guide Slider 1; 223. Mounting Groove; 224. Guide Groove 2; 225. Gate Blade 1; 2251. Cutting Edge 1; 2252. Cutting Edge 2; 2253. Cutting Edge 3; 226. Gate Blade 2; 227. Gate Blade 3; 23. Alloy Cutting Head; 24. Lifting Gate Knife; 241. Guide Slider 2; 242. Cutting Edge 4; 25. Hydraulic Cylinder 3; 3. Support Module; 31. Fixed Support 311. Guide groove three; 32. Lifting support platform; 321. Guide slider three; 322. Mounting hole two; 4. Clamping block; 41. Guide slider four; 5. Conveying module; 51. Conveyor belt; 52. Drive shaft one; 53. Drive shaft two; 54. Drive gear; 6. Gearbox; 61. Housing; 62. Input shaft; 63. Intermediate shaft; 64. Output shaft; 65. Gear one; 66. Gear two; 67. Gear three; 7. Motor; 8. External knife switch cutting line; 81. External knife switch cutting area; 9. Internal knife switch cutting line; 91. Internal knife switch cutting area. Detailed Implementation

[0077] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0078] Example 1

[0079] Reference Figures 1-36 The present invention provides an adjustable-blade hydraulic gantry shear, which mainly includes a platform body 1, a gate cutting module 2, a support module 3, a clamping block 4, a conveying module 5, and a reduction gearbox 6.

[0080] The platform 1 is equipped with a gantry structure, and six hydraulic cylinders 11 are mounted on its top. The output ends of the hydraulic cylinders 11 extend downwards from the platform 1 and are arranged symmetrically in two rows. The output ends of the outer row of hydraulic cylinders 11 are fixedly connected to the upper surface of the gate-cutting module 2, while the inner row is fixedly connected to the upper surface of the clamping block 4. The hydraulic cylinders 11 can drive the gate-cutting module 2 and the clamping block 4 to move up and down along the platform 1. Four guide grooves 12 are provided on the side walls of the gantry, and guide sliders 41 are provided on both sides of the clamping block 4. Through the cooperation of the guide sliders 41 and the guide grooves 12, the clamping block 4 and the platform 1 are slidably connected, ensuring the stability of movement.

[0081] The gate cutting module 2 is fixed to the output end of the outer row of hydraulic cylinders 11. The gate cutting module 2 includes an outer gate 21, an inner gate 22, a lifting gate 24, and a hydraulic cylinder 25. The inner gate 22 has a guide slider 222 on its side. The outer gate 21 is fastened to the inner gate 22 with screws. Both have alloy blades 23 installed at their bottoms, and the cutting edges are flush and coincident in the main viewing angle. The inner gate 22 slides with the guide groove 12 of the platform 1 through the guide slider 222. The bottom of the inner gate 22 has two downward-opening mounting grooves 223, and the two side walls of the mounting grooves 223 have guide grooves 224. The inner gate 22 is divided into three gate blades by the mounting grooves 223, namely gate blade 1 225, gate blade 2 226, and gate blade 3 227. The bottom of each gate blade is provided with three inclined cutting edges, namely cutting edge 1 2251, cutting edge 2252, and cutting edge 3 2253. The bottom of the lifting gate 24 is also equipped with an alloy blade 23. The cutting edge of the lifting gate 24 is provided with an inclined cutting edge 242. The side of the lifting gate 24 is provided with a guide slider 241. Through the cooperation of the guide slider 241 and the guide groove 224, a sliding connection with the internal gate 22 is achieved. The upper surface of the internal gate 22 has two stepped mounting holes 221 corresponding to the mounting groove 223. The hydraulic cylinder 25 is installed in the mounting hole 221, with its output end extending downward out of the mounting groove 223. The hydraulic cylinder 25 is fixed and positioned by the end cap. The output end of the hydraulic cylinder 25 is fixed to the upper surface of the lifting gate 24, which can drive the lifting gate 24 to move up and down in the mounting groove 223. When the present invention needs to cut strip steel or cut plate steel into strips, hydraulic cylinder three 25 pushes the lifting gate 24 downward, so that the cutting edge four 242 of the lifting gate 24 and the cutting edge two 2252 of the three gate blades merge into a long cutting edge; when the present invention needs to cut plate steel into blocks, hydraulic cylinder three 25 retracts, so that the lifting gate 24 moves upward to the top, so that the gate blade one 225, gate blade two 226 and gate blade three 227 at the bottom of the inner gate 22 act on the steel, and the cutting edge one 2251, cutting edge two 2252 and cutting edge three 2253 of each gate blade cut the steel.

[0082] A support module 3 is located at the bottom of the platform 1, directly below the gate cutting module 2, for cooperating with the gate cutting module 2 to complete the steel gate cutting operation. The support module 3 includes a fixed support platform 31 and a lifting support platform 32. The fixed support platform 31 is fixedly connected to the platform 1, and its outer side wall is provided with a guide groove 311. The inner side wall of the lifting support platform 32 is provided with a corresponding guide slider 321. Through the cooperation of the guide groove 311 and the guide slider 321, a sliding connection is achieved with the fixed support platform 31. A hydraulic cylinder 13 is installed at the bottom of the platform 1, with its output end facing upward. The bottom of the lifting support platform 32 is provided with two mounting holes 322. The bottom of the mounting holes 322 of the lifting support platform 32 is fixedly connected to the output end of the hydraulic cylinder 13. The upper end of the lifting support platform 32 is adapted to the mounting groove 223 at the bottom of the internal gate 22, and the inner side of the internal gate 22 is flush with the outer side of the fixed support platform 31.

[0083] A reduction gearbox 6 is located on the outer side of the platform 1. Its structure includes a housing 61, an input shaft 62, an intermediate shaft 63, an output shaft 64, a first gear 65, a second gear 66, and a third gear 67. The input shaft 62, intermediate shaft 63, and output shaft 64 are all rotatably connected to the housing 61 via bearings. The head of the input shaft 62 extends to the outside of the housing 61 and is connected to the output end of the motor 7 via a coupling. The first gear 65 is keyed to the input shaft 62, the second gear 66 is keyed to the intermediate shaft 63, and the third gear 67 is keyed to the output shaft 64. The power transmission path is as follows: the first gear 65 meshes with the second gear 66, the second gear 66 then meshes with the third gear 67, and finally, the power is output to the outside of the housing 61 from the tail of the output shaft 64.

[0084] The inner side of the platform 1 is equipped with a conveying module 5, which is used to convey steel to the gate cutting module 2 to complete the gate cutting operation. The conveying module 5 includes a conveyor belt 51, a first drive shaft 52, a second drive shaft 53, and a drive gear 54. It is arranged horizontally and its height is slightly higher than that of the fixed support platform 31. The conveyor belt 51 has a flexible rack inside, which meshes with the drive gear 54 to achieve transmission. Two drive gears 54 are installed on both the first drive shaft 52 and the second drive shaft 53, and both the first drive shaft 52 and the second drive shaft 53 are rotatably connected to the platform 1 through bearings. The head of the second drive shaft 53 extends out of the platform 1 and is connected to the tail of the output shaft 64 of the reduction gearbox 6 through a coupling to realize power input.

[0085] In this invention, the motor 7 is a stepper motor. A length monitoring device is set at the position where the gate cutting operation is performed. When the conveying module 5 conveys the steel to the set position, the length monitoring device detects that the length of the steel extending out of the support module 3 reaches the set length and transmits an electromagnetic signal to the control system. The control system controls the motor 7 to stop power output. At this time, the gate cutting operation is performed. After the gate cutting is completed, the control system enables the motor 7 to continue to output power, and the conveying module 5 continues to convey the steel, repeating the gate cutting operation.

[0086] Example 2

[0087] Based on Embodiment 1, the following is a method for using an adjustable-blade hydraulic gantry shear to cut strip steel into segments or plate steel into strips:

[0088] Before the gate cutting operation, hydraulic cylinder 25 drives the lifting gate 24 to move down until the cutting edge 242 of the lifting gate 24 merges with the cutting edge 2252 of each section of the internal gate 22 to form a whole cutting edge. Then, hydraulic cylinder 13 retracts to the shortest stroke, so that the lifting support platform 32 is in the lowest position.

[0089] The steel is placed on the conveyor belt 51, the motor 7 is started, and the power is transmitted to the drive shaft 53 through the reduction gearbox 6, which drives the transmission gear 54 to rotate, thereby driving the conveyor belt 51 to transport the strip steel.

[0090] The strip steel extends out of the end face of the fixed support platform 31. When the extended length reaches the target value, the motor 7 stops running.

[0091] At this time, the three hydraulic cylinders on the inner side output power to drive the clamping block 4 to move down, so that the clamping block 4 clamps the strip steel.

[0092] Subsequently, the three hydraulic cylinders 11 on the outer side output power to drive the gate cutting module 2 to move down. Under the coordinated action of the internal gate 22, the lifting gate 24 and the fixed support platform 31, the strip steel is cut off.

[0093] After the gate is cut off, the hydraulic cylinder 11 retracts, lifting the gate cutting module 2 and the clamping block 4.

[0094] The device repeats the above conveying, pressing, and shut-off processes until all processing is completed.

[0095] Example 3

[0096] Based on Example 1, a method for using an adjustable-blade hydraulic gantry shear to cut plate steel into blocks is as follows:

[0097] Before the gate cutting operation, hydraulic cylinder 25 drives the lifting gate 24 to rise to the highest position in the mounting slot 223, so that the internal gate 22 has a three-section gate blade structure. Hydraulic cylinder 13 outputs power to drive the lifting support platform 32 to rise until its top end face is flush with the end face of the fixed support platform 31.

[0098] The steel is placed on the conveyor belt 51, the motor 7 is started, the transmission shaft 53 rotates, driving the transmission gear 54 to rotate, and thus driving the conveyor belt 51 to transport the strip steel.

[0099] Once the steel plate reaches the target position, motor 7 stops outputting power.

[0100] At this time, the three hydraulic cylinders on the inner side drive the clamping block 4 to move down, so that the clamping block 4 clamps the strip steel.

[0101] Subsequently, the three hydraulic cylinders 11 on the outer side drive the gate cutting module 2 to move down. Under the coordinated action of the inner gate 22, the lifting gate 24 and the fixed support platform 31, the inner gate 22 cuts off the inner gate cutting area 91 from the plate steel along the inner gate cutting line 9, and the outer gate 21 cuts off the outer gate cutting area 81 from the plate steel along the outer gate cutting line 8.

[0102] After the gate is cut off, the hydraulic cylinder 11 retracts, lifting the gate cutting module 2 and the clamping block 4.

[0103] The device repeats the above conveying, pressing, and shut-off processes until all processing is completed.

Claims

1. A hydraulic gantry shear with adjustable blade edge, characterized in that: The device includes a platform (1), a gate cutting module (2), a support module (3), and a clamping block (4). A hydraulic cylinder (11) is installed on the platform (1). The hydraulic cylinder (11) drives the gate cutting module (2) to move up and down. The hydraulic cylinder (11) drives the clamping block (4) to move up and down. The support module (3) is fixedly connected to the platform (1). The support module (3) is located below the gate cutting module (2). The support module (3) cooperates with the gate cutting module (2). The gate cutting module (2) includes an external gate (21), an internal gate (22) and a lifting gate (24). The bottom of the internal gate (22) is provided with an opening downward mounting groove (223). The bottom of the internal gate (22) is divided into multiple gate blades by the mounting groove (223). The bottom of each gate blade is provided with an inclined cutting edge one (2251), a cutting edge two (2252) and a cutting edge three (2253). The lifting gate (24) is slidably connected to the mounting groove (223). The bottom of the lifting gate (24) is provided with an inclined cutting edge four (242). The upper surface of the lifting gate (24) is fixedly connected to the pushing component. The pushing component drives the lifting gate (24) to move up and down in the mounting groove (223). The external gate (21) is fixedly connected to the outer side of the internal gate (22). The support module (3) includes a fixed support platform (31) and a lifting support platform (32). The fixed support platform (31) is fixedly connected to the platform body (1). The outer side of the fixed support platform (31) coincides with the inner side of the internal guillotine (22). The lifting support platform (32) is slidably connected to the fixed support platform (31). A pushing component is connected to the bottom of the lifting support platform (32). The pushing component drives the lifting support platform (32) to move up and down.

2. The adjustable-blade hydraulic gantry shear according to claim 1, characterized in that: The upper surface of the internal gate (22) is provided with a through stepped mounting hole (221). The position of the mounting hole (221) corresponds to the mounting groove (223). A hydraulic cylinder (25) is installed in the mounting hole (221). The output end of the hydraulic cylinder (25) faces downward. The output end of the hydraulic cylinder (25) is fixedly connected to the upper surface of the lifting gate (24).

3. The adjustable-blade hydraulic gantry shear according to claim 1, characterized in that: The bottom of the platform (1) is equipped with a hydraulic cylinder two (13), the output end of the hydraulic cylinder two (13) faces upward, and the bottom of the lifting support platform (32) is provided with a mounting hole two (322), the bottom of the mounting hole two (322) is fixedly connected to the output end of the hydraulic cylinder two (13).

4. The adjustable-blade hydraulic gantry shear according to claim 1, characterized in that: The mounting groove (223) is provided with guide grooves (224) on both sides, and the lifting gate (24) is provided with guide sliders (241) on both sides. The lifting gate (24) is slidably connected to the internal gate (22) through the guide sliders (241) and guide grooves (224).

5. The adjustable-blade hydraulic gantry shear according to claim 1, characterized in that: The inner side of the platform (1) is provided with a guide groove (12), and the two sides of the internal gate (22) are provided with guide sliders (222). The gate cutting module (2) is slidably connected to the platform (1) through the guide sliders (222) and the guide grooves (12). The two sides of the clamping block (4) are provided with guide sliders (41), and the clamping block (4) is slidably connected to the platform (1) through the guide sliders (41) and the guide grooves (12).

6. The adjustable-blade hydraulic gantry shear according to claim 1, characterized in that: It also includes a conveying module (5), which includes a conveyor belt (51), a first drive shaft (52), a second drive shaft (53), and a transmission gear (54). The first drive shaft (52) and the second drive shaft (53) are rotatably connected to the platform (1). The first drive shaft (52) and the second drive shaft (53) are both fixedly connected to the transmission gear (54). The transmission gear (54) meshes with the conveyor belt (51) for transmission. The head of the second drive shaft (53) extends to the side of the platform (1) and the head of the second drive shaft (53) is connected to the power source.

7. The adjustable-blade hydraulic gantry shear according to claim 1, characterized in that: Alloy blades (23) are provided at the blade edges of the external blade (21), internal blade (22) and lifting blade (24).

8. A method of using an adjustable-blade hydraulic gantry shear according to any one of claims 1 to 7, characterized in that: Includes the following steps: A1. When it is necessary to cut strip steel or cut plate steel into strips, hydraulic cylinder two (13) retracts, lifting support platform (32) descends, hydraulic cylinder three (25) outputs power, driving the lifting gate (24) to move down to be aligned with the cutting edge of the internal gate (22); A2. Place the steel on the conveyor belt (51); A3. The power source outputs power, the second transmission shaft (53) rotates, the second transmission shaft (53) drives the transmission gear (54) to rotate, the transmission gear (54) drives the conveyor belt (51) to transport the steel to the gate position. A4. Once the steel reaches its designated position, the power source will stop outputting power. A5. The hydraulic cylinder 1 (11) of the clamping block (4) pushes the clamping block (4) down, and the clamping block (4) clamps the steel. A6. The hydraulic cylinder 1 (11) of the gate cutting module (2) pushes the gate cutting module (2) down. The gate cutting module (2) and the support module (3) work together to cut the plate. A7. The hydraulic cylinder 1 (11) of the gate cutting module (2) retracts, causing the gate cutting module (2) to move upward; A8. The hydraulic cylinder of the clamping block (4) retracts, causing the clamping block (4) to move upward; A9. Repeat operations A3 to A8 until the gate cutting process of strip steel sections or plate steel strips is completed.

9. The method of using an adjustable-blade hydraulic gantry shear according to claim 8, characterized in that: Includes the following steps: B1. When it is necessary to cut the plate steel into small pieces, the hydraulic cylinder two (13) outputs power, and the hydraulic cylinder two (13) drives the lifting support platform (32) to rise to the same level as the fixed support block. The hydraulic cylinder three (25) retracts, so that the lifting gate (24) moves upward to the highest point in the mounting groove (223). B2. Place the steel on the conveyor belt (51); B3. The power source outputs power, the second transmission shaft (53) rotates, the second transmission shaft (53) drives the transmission gear (54) to rotate, the transmission gear (54) drives the conveyor belt (51) to transport the steel to the gate position. B4. Once the steel reaches its designated position, the power source will stop outputting power. B5. The hydraulic cylinder of the clamping block (4) pushes the clamping block (4) down, and the clamping block (4) clamps the steel. B6. The hydraulic cylinder 1 (11) of the gate cutting module (2) pushes the gate cutting module (2) down. Under the joint action of the gate cutting module (2) and the support module (3), the internal gate (22) of the gate cutting module (2) cuts off the internal gate cutting area (91) from the plate steel along the internal gate cutting line (9), and the external gate (21) cuts off the external gate cutting area (81) from the plate steel along the external gate cutting line (8). B7. The hydraulic cylinder 1 (11) of the gate cutting module (2) retracts, causing the gate cutting module (2) to move upward; B8. The hydraulic cylinder of the clamping block (4) retracts, causing the clamping block (4) to move upward; B9. Repeat steps B3 to B8 until the cutting of the plate steel blocks is completed.

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