A multi-guide large gantry band saw

Abstract

The present invention discloses a multi-rail large gantry band sawing machine, aiming to solve the deficiencies in the prior art of low forging precision, poor stability and inconvenient operation of large gantry band sawing machines. To solve the above technical problems, the present invention adopts the following technical solutions: A multi-rail large gantry band sawing machine includes: The feeding device includes a feeding track and a feeding table, and the feeding table slides along the feeding track; Anti-rolling blocks are symmetrically arranged on the feeding table; Two vertical tracks are respectively arranged on both sides of the gantry, sliders cooperating with the vertical tracks are arranged on the saw frame, and hydraulic cylinders for pushing the saw frame to move are arranged on both sides of the gantry, and the hydraulic cylinders are vertically arranged between the two vertical tracks; The movable clamping device is arranged on both sides of the feeding table, and the movable clamping device includes a movable clamping block and a hydraulic device. By arranging multiple vertical tracks and hydraulic cylinders to push the movement of the saw frame, it has the advantages of good stability and high cutting precision.

Description

Technical Field

[0001] The present invention relates to the technical field of band sawing machines, and more specifically, it relates to a multi-rail large gantry band sawing machine. Background Art

[0002] With the continuous expansion of the production capacity of the domestic large forging industry, the demand for large sawing equipment is becoming more urgent; however, it is very difficult to stably and accurately cut large and heavy forgings; therefore, how to improve the cutting accuracy and stability during cutting is an urgent problem to be solved in the current band sawing machine industry.

[0003] Chinese Patent Publication No. CN214517932U, publication date April 30, 2021, the invention name is a traveling high-precision horizontal gantry band sawing machine. This application discloses a high-precision horizontal gantry band sawing machine, which moves by setting a moving frame and a left and right moving mechanism on the moving frame, so that the workpiece can be driven to move, and the workpiece can be cut in multiple segments, with the advantages of high precision and high installation coefficient; however, the above device has the following deficiencies: (1) Since the lifting of the sawing machine is realized by two servo motors and lead screws, when cutting large forgings, the stability is poor and the load-bearing capacity is weak, thus affecting the cutting accuracy; (2) It is necessary to adjust the position of the clamping block according to the size of the workpiece, and the operation is inconvenient. Summary of the Invention

[0004] The present invention overcomes the deficiencies of low forging accuracy, poor stability, and inconvenient operation of the existing large gantry band sawing machine, and provides a multi-rail large gantry band sawing machine, which has the advantages of high stability, high accuracy, and convenient operation.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A multi-rail large gantry band sawing machine, comprising:

[0006] A feeding device, including a feeding track and a feeding table, the feeding table slides along the feeding track; anti-rolling blocks are symmetrically arranged on the feeding table;

[0007] A gantry frame, two vertical tracks are respectively arranged on both sides of the gantry frame, sliders matching with the vertical tracks are arranged on the saw frame, and hydraulic cylinders for pushing the saw frame to move are arranged on both sides of the gantry frame, and the hydraulic cylinders are vertically arranged between the two vertical tracks;

[0008] A movable clamping device, arranged on both sides of the feeding table, the movable clamping device includes a movable clamping block and a hydraulic device, and the hydraulic device pushes the clamping block to move along the transverse direction of the feeding table.

[0009] In the present invention, by providing multiple vertical tracks, the saw frame slides more stably along the vertical tracks. At the same time, a hydraulic cylinder is used to push the movement of the saw frame. Since the hydraulic cylinder has the advantages of large thrust and good stability, it further makes the movement of the saw frame more stable. In addition, during cutting, the workpiece is moved by the clamping block pushed by the hydraulic device, so that the clamping block can tightly clamp the workpiece, preventing the workpiece from shaking during cutting, making the cutting more stable and effectively improving the cutting accuracy. In addition, through the cooperation of the feeding table and the feeding track, the workpiece can be conveniently moved. At the same time, through the movable clamping device, it is not necessary to frequently adjust the clamping position of the clamping block, which has the characteristics of convenient operation.

[0010] Preferably, three feeding tracks are provided, and pulleys cooperating with the feeding tracks are provided at the bottom of the feeding table. Ring grooves cooperating with the tracks are provided on the pulleys.

[0011] Setting the feeding tracks to three makes the movement of the feeding table more stable during the movement. At the same time, ring grooves cooperating with the tracks are provided on the pulleys, so that the ring grooves roll on the tracks when the pulleys roll, and it also makes the feeding table slide along the tracks more stable.

[0012] Preferably, anti-disengagement plates are provided at both the front and rear ends of the feeding table. The feeding track is an I-shaped track. A bayonet cooperating with the track is provided on the anti-disengagement plate, and an anti-disengagement block that contracts inward is provided at the opening of the bayonet. The anti-disengagement block is clamped at the waist of the I-shaped rod.

[0013] Through the above settings, when the workpiece is placed on the feeding table, it effectively prevents the other end of the feeding table from tilting and prevents the feeding table from disengaging from the feeding track.

[0014] Preferably, a number of horizontally arranged T-shaped bars are provided along the length direction of the feeding table, and a gap is provided between adjacent T-shaped bar brackets.

[0015] The setting of the gap makes it more convenient to cut the workpiece.

[0016] Preferably, every two movable clamping devices are set as a group, and a group of movable clamping devices are respectively provided on both sides in the width direction of the gantry.

[0017] The symmetric setting of the movable clamping devices enables the workpiece to be clamped and pushed at the same time, so that the workpiece is located at the center line position of the feeding table during cutting. And setting two groups of movable clamping devices forms a clamping effect at four points, making the clamping effect better.

[0018] Preferably, the anti-rolling block is triangular, and every two anti-rolling blocks are set as a group. The two anti-rolling blocks in each group are symmetrically arranged on both sides of the center line of the feeding table.

[0019] The symmetrically arranged anti-roll blocks can effectively prevent the workpiece from rolling down.

[0020] Preferably, the anti-roll block is slidably arranged along the width direction of the feeding platform, a first piston cylinder is fixedly arranged at the bottom of the feeding platform, a first connecting rod is slidably arranged in the first piston cylinder, one end of the first connecting rod is fixedly connected to the anti-roll block, and the other end of the first connecting rod is provided with a piston head, a first spring is provided in the first piston cylinder, and the first spring pushes the first piston head to move in a direction close to the center line of the feeding platform; the piston head slides along the first piston cylinder, and the piston cylinder is filled with hydraulic oil;

[0021] The piston head is provided with a plurality of oil guide holes extending axially therethrough in the circumferential direction, and a sealing hole communicating with the oil guide hole is provided radially inside the piston head. A sealing piston and a return spring are provided in the sealing hole, and the return spring pushes the sealing piston away from the oil guide hole. A first channel is provided inside the first connecting rod, and one end of the first channel is communicated with the sealing hole.

[0022] A second piston cylinder is vertically arranged at the center position of the feeding table, a second connecting rod is slidingly arranged in the second piston cylinder, a pressure head is arranged at the upper end of the second connecting rod, a pressurizing piston is arranged at the lower end of the second connecting rod, a second spring is arranged between the pressurizing piston and the bottom of the second piston cylinder, the pressurizing piston and the second piston cylinder form a second sealed chamber, hydraulic oil is arranged in the second sealed chamber, and the second sealed chamber is connected to the first channel through an oil pipe.

[0023] Through the above arrangement, the workpiece is placed on the feeding table at the center line position, and the anti-roll block can form a stable positioning for the workpiece to prevent the workpiece from deflecting or rolling.

[0024] Preferably, a material stopping device is provided at the end of the feeding platform, and the material stopping device includes: a material stopping rack and a material stopping cylinder, the two sides of the bottom of the material stopping rack are rotatably set on the side walls of the feeding platform, one end of the material stopping cylinder is connected to the feeding platform, and the other end of the material stopping cylinder is connected to the bottom of the material guide rack.

[0025] When the stop cylinder is retracted, the stop frame remains in a vertical position, supporting the cut workpiece and preventing it from falling. When the stop cylinder is extended, the stop cylinder drives the stop frame to rotate, causing the stop frame to flip horizontally, making it easier to unload the cut workpiece.

[0026] Preferably, a magnetic fixing device is provided at the upper end of the material blocking rack, and a switch wrench is provided on the magnetic fixing device, and the switch wrench is used to control the magnetic fixing device to generate magnetic attraction force.

[0027] The magnetic attraction force is controlled by the switch wrench, which can generate magnetic attraction on the cut workpiece to prevent the workpiece from tipping over.

[0028] Preferably, it further includes a maintenance ladder, which includes longitudinal ladders arranged on both sides of the feeding track, and the upper ends of the longitudinal ladders are connected by a transverse ladder.

[0029] The arrangement of the transverse ladder and the longitudinal ladders facilitates the staff to climb onto the transverse ladder through the longitudinal ladders to observe and maintain the multi-guide large gantry band saw.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By arranging multiple vertical tracks, the saw frame slides more stably along the vertical tracks, effectively improving the cutting stability and cutting accuracy;

[0031] (2) The movement of the saw frame is driven by a hydraulic cylinder. Since the hydraulic cylinder has the advantages of large thrust and good stability, the movement of the saw frame is further stabilized;

[0032] (3) During cutting, the workpiece moves with the clamping block pushed by the hydraulic device, enabling the clamping block to tightly clamp the workpiece, preventing the workpiece from shaking during the cutting process, making the cutting more stable, and effectively improving the cutting accuracy;

[0033] (4) Through the cooperation of the feeding table and the feeding track, the workpiece can be conveniently moved, featuring convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a three-dimensional structure diagram of the present invention;

[0035] Figure 2 is a three-dimensional structure diagram of the gantry of the present invention;

[0036] Figure 3 is a structure diagram of the feeding device of the present invention;

[0037] Figure 4 is a sectional view of the feeding device of the present invention;

[0038] Figure 5 is Figure 4 a partial enlarged view in

[0039] In the figure: 1. Feeding device, 11. Feeding track, 12. Feeding table, 121. T-shaped strip, 122. Anti-rolling block, 123. Pulley, 13. Anti-disengagement plate, 131. Bayonet, 132. Anti-disengagement block;

[0040] 2. Saw frame, 21. Slide block;

[0041] 3. Gantry, 31. Vertical track, 32. Hydraulic cylinder;

[0042] 4. Movable clamping device, 41. Clamping block, 42. Hydraulic device;

[0043] 5. Maintenance ladder, 51. Longitudinal ladder, 52. Transverse ladder;

[0044] 6. Material blocking device, 61. Material blocking frame, 62. Material blocking oil cylinder, 63. Magnetic adsorption fixing device, 631. Switch wrench;

[0045] 71. First piston cylinder, 711. First spring, 72. First connecting rod, 721. Vertical connecting rod, 73. Piston head, 731. Oil guiding hole, 732. Sealing hole, 74. Sealing piston, 75. Return spring, 76. Second piston cylinder, 77. Second connecting rod, 771. Pressing head, 772. Pressurizing piston, 78. Second spring, 79. Oil pipe. Detailed implementation manners

[0046] The technical solutions of the present invention will be further specifically described below through specific embodiments in conjunction with the drawings:

[0047] Embodiment 1: Refer to Figures 1 to 3 As shown, a multi-rail large-scale gantry band sawing machine includes a feeding device 1 for feeding, a saw frame 2 for installing a saw blade, a gantry 3 for supporting and pushing the saw frame to move in the vertical direction, a movable clamping device 4 for clamping the workpiece, and a maintenance ladder 5 for facilitating the maintenance of the staff:

[0048] The feeding device includes a feeding track 11 and a feeding table 12. The feeding track is an I-shaped track, and the feeding table slides along the feeding track. A number of horizontally arranged T-shaped bars 121 are provided along the length direction of the feeding table, and a gap is provided between adjacent T-shaped bars. The setting of the gap makes it more convenient to cut the workpiece; anti-rolling blocks 122 are symmetrically arranged on the feeding table. The anti-rolling blocks are triangular blocks, and every two anti-rolling blocks are in a group. The two anti-rolling blocks in each group are symmetrically arranged on both sides of the center line of the feeding table.

[0049] In order to make the feeding table move more stably during the movement process, the feeding track is set to three. The bottom of the feeding table is provided with pulleys 123 that cooperate with the feeding track. At the same time, a ring groove that cooperates with the track is provided on the pulley, so that the ring groove rolls on the track when the pulley rolls.

[0050] In addition, in order to prevent the other end of the feeding table from tilting when the workpiece is placed on the feeding table, causing the feeding table to disengage from the feeding track, anti-disengagement plates 13 are provided at both the front and rear ends of the feeding table. The feeding track is an I-shaped track. The anti-disengagement plate is provided with a bayonet 131 that cooperates with the track. An anti-disengagement block 132 that contracts inward is provided at the opening of the bayonet, and the anti-disengagement block is clamped at the waist of the I-shaped rod.

[0051] On both sides of the gantry, two vertical rails 31 are respectively arranged. Sliders 21 that cooperate with the vertical rails are arranged on the saw frame. Hydraulic cylinders 32 for pushing the saw frame to move are arranged on both sides of the gantry. The hydraulic cylinders are vertically arranged between the two vertical rails. Through the cooperation of multiple vertical rails and sliders, the saw frame can move more stably on the gantry, making the cutting of workpieces more stable, improving the cutting accuracy. At the same time, the saw frame is driven to move up and down by the hydraulic cylinders, enabling the saw frame to bear a greater load and being safer and more reliable.

[0052] The movable clamping devices 4 are arranged on both sides of the feeding table. The movable clamping devices include movable clamping blocks 41 and hydraulic devices 42. An elastic contact layer is arranged on the contact surface between the clamping blocks and the workpiece. The elastic contact layer enables the clamping blocks to flexibly abut against the workpiece, and the hydraulic clamping can make the clamped workpiece more stable. The hydraulic device pushes the clamping blocks to move along the transverse direction of the feeding table. Every two movable clamping devices are set as a group, and each group of movable clamping devices is symmetrically arranged on both sides in the width direction of the feeding track. The two groups of movable clamping blocks are arranged on both sides in the width direction of the gantry.

[0053] The maintenance ladder 5 includes longitudinal ladders 51 arranged on both sides of the feeding track, and the upper ends of the longitudinal ladders are connected by a transverse ladder 52. The arrangement of the transverse ladder and the longitudinal ladders facilitates the staff to climb up the transverse ladder through the longitudinal ladders to observe and maintain the multi-guide large gantry band sawing machine.

[0054] The working principle of this embodiment is as follows: Place the workpiece on the feeding table, and the anti-rolling blocks on the feeding table are used to prevent the workpiece from rolling off the feeding table. Then, push the feeding table to move along the feeding track. When the feeding table moves to a suitable position and stops, at this time, the feeding table is below the saw frame. Then, the hydraulic device pushes the clamping blocks to move towards the workpiece to clamp and fix the workpiece, preventing the workpiece from shifting during cutting and making the cutting more stable. Then, the hydraulic cylinder moves, and the movable end of the hydraulic cylinder drives the saw frame to move downward, enabling the saw blade to cut the workpiece. After cutting is completed, the movable end of the hydraulic cylinder drives the saw frame to move upward again, making the saw blade away from the workpiece. Then, the hydraulic device drives the clamping blocks to move away from the workpiece, and then the feeding table continues to move along the feeding track for the next cutting.

[0055] Embodiment 2: Refer to Figures 1 to 3 As shown, this embodiment is similar in structure to Embodiment 1. The difference is that a stop device 6 is arranged at the end of the feeding table. The stop device includes: a stop frame 61 and a stop oil cylinder 62. The two sides at the bottom of the stop frame are rotatably arranged on the side wall of the feeding table. One end of the stop oil cylinder is connected to the feeding table, and the other end of the stop oil cylinder is connected to the bottom of the guide frame. When the stop oil cylinder contracts, at this time, the stop frame remains in a vertical state (as Figure 3As shown in the figure, it plays a supporting role for the cut workpieces to prevent the cut workpieces from tipping over. When the material blocking oil cylinder extends, the material blocking oil cylinder drives the material blocking frame to rotate, causing the material blocking frame to flip in the horizontal direction, facilitating the unloading of the cut workpieces.

[0056] A magnetic adsorption fixing device 63 is provided at the upper end of the material blocking frame. The magnetic adsorption fixing device belongs to the prior art. A switch wrench 631 is provided on the magnetic adsorption fixing device, and the switch wrench is used to control the magnetic adsorption fixing device to generate magnetic attraction. By controlling the magnetic attraction force through the switch wrench, a magnetic attraction force can be generated on the cut workpieces to prevent the workpieces from tipping over.

[0057] Embodiment 3: Refer to Figures 4 to 5 As shown in the figure, this embodiment is similar in structure to Embodiment 1 or Embodiment 2. The difference is that the anti-rolling block 122 is slidably arranged along the width direction of the feeding table; a first piston cylinder 71 is fixedly arranged at the bottom of the feeding table, and the first piston cylinder is arranged along the width direction of the feeding table. A first connecting rod 72 is slidably arranged in the first piston cylinder. One end of the first connecting rod is fixedly connected to the anti-rolling block through a vertical connecting rod 721. A piston head 73 is fixedly arranged at the other end of the first connecting rod. A first spring 711 is arranged in the first piston cylinder, and the first spring abuts against the piston head and the bottom of the first piston cylinder away from the center line of the feeding table respectively; the first spring pushes the first piston head to move towards the center line of the feeding table; the piston head is in sealing fit and sliding with the inner side wall of the first piston cylinder. The piston head divides the first piston rod into two chambers on both sides of the piston head, and the first piston cylinder is filled with hydraulic oil.

[0058] A plurality of oil guide holes 731 penetrating in the axial direction are arranged in the circumferential direction of the piston head. The oil guide holes communicate the two chambers on both sides of the piston head, and the two ends of the oil guide holes are arranged in a trumpet shape with gradually increasing openings; a sealing hole 732 communicating with the oil guide holes is arranged in the radial direction inside the piston head. A sealing piston 74 and a return spring 75 are arranged in the sealing hole. The return spring pushes the sealing piston away from the oil guide hole, and a return sealing cavity is formed at the bottom of the oil guide hole in the sealing hole; a first channel 722 is arranged inside the first connecting rod, and one end of the first channel is communicated with the sealing hole.

[0059] A second piston cylinder 76 is vertically arranged at the center position of the feeding table. A second connecting rod 77 is slidably arranged in the second piston cylinder. A pressure head 771 is arranged at the upper end of the second connecting rod, and a pressurizing piston 772 is arranged at the lower end of the second connecting rod. A second spring 78 is arranged between the pressurizing piston and the bottom of the second piston cylinder. The two ends of the second spring abut against the bottom of the second piston cylinder and the pressurizing piston respectively; the pressurizing piston and the side wall of the second piston cylinder cooperate to form a second sealing cavity at the bottom of the pressurizing piston. Hydraulic oil is arranged in the second sealing cavity, and the second sealing cavity is communicated with the first channel through a oil pipe 79.

[0060] In this embodiment, in order to place the workpiece at the center line position when it is placed on the feeding table, making the cutting more accurate and stable, this embodiment is set up. The specific working principle is as follows: 1) When the workpiece is not placed on the anti-rolling block, the first connecting rod at the bottom of the anti-rolling block is acted on by the first spring force, so that the anti-rolling block is located at a position close to the center of the feeding table. At this time, the oil guiding hole connects the chambers on both sides of the piston head.

[0061] 2) When the workpiece is placed on the anti-rolling block, the two sides of the bottom of the workpiece are in contact with the anti-rolling block. At this time, the gravity of the workpiece acts on the inclined surface of the anti-rolling block, causing the anti-rolling block to slide in the direction away from the center line of the feeding table, and the piston head also slides in the first piston cylinder. As the anti-rolling block slides in the direction away from the center line of the feeding table, the bottom of the workpiece continuously descends. When the bottom of the workpiece acts on the pressure head, the pressure head moves downward under the pressure of the workpiece, causing the pressurizing piston to move in the second piston cylinder through the second connecting rod, reducing the volume of the second sealing chamber, and causing the hydraulic oil in the second sealing chamber to flow along the oil pipe and the first channel into the reset sealing chamber in the sealing hole. The hydraulic oil pushes the sealing piston to overcome the elastic force of the reset spring, causing the sealing piston to move into the oil guiding hole, and the end of the sealing piston enters the oil guiding hole, closing the oil guiding hole, forming two independent sealed chambers on both sides of the piston head. At this time, the piston head cannot slide in the first piston cylinder, so that the first connecting rod also stops moving, and then the anti-rolling block stops moving. And at this time, the anti-rolling block just abuts against both sides of the workpiece, playing a limiting role on the workpiece. At the same time, the bottom of the workpiece contacts the feeding table, making the workpiece located at the center line position of the feeding table and not shifting with the movement or shaking of the feeding table; making the workpiece more stable when being cut and conducive to improving the cutting accuracy.

[0062] 3) When the workpiece is removed after being cut, the second spring pushes the pressurizing piston upward to reset the pressurizing piston, increasing the volume of the second sealing chamber, causing the hydraulic oil in the oil pipe and the first channel to flow back to the second sealing chamber, reducing the pressure in the sealing hole, and causing the reset spring to push the sealing piston to move in the direction away from the oil guiding hole, reopening the oil guiding hole, reconnecting the chambers on both sides of the piston head through the oil guiding hole, and causing the piston head to move in the direction close to the center line of the feeding table under the action of the first spring force to complete the reset.

[0063] The above-described embodiments are only preferred solutions of the present invention, and do not impose any form of limitation on the present invention. There are other variations and modifications without exceeding the technical solutions recorded in the claims.

Claims

1. A multi-guide large gantry band sawing machine, characterized in that Including: A feeding device, including a feeding track and a feeding table, and the feeding table slides along the feeding track; Anti-rolling blocks are symmetrically and slidably arranged on the feeding table; A gantry, with two vertical tracks respectively arranged on both sides of the gantry, sliders cooperating with the vertical tracks are arranged on the saw frame, and hydraulic cylinders for pushing the saw frame to move are arranged on both sides of the gantry, and the hydraulic cylinders are vertically arranged between the two vertical tracks; An active clamping device is arranged on both sides of the feeding table, and the active clamping device includes an active clamping block and a hydraulic device, and the hydraulic device pushes the clamping block to move along the transverse direction of the feeding table; A first piston cylinder, in which a first spring and a first connecting rod are arranged; both ends of the first connecting rod are respectively connected to the anti-rolling block and the piston head; the first spring pushes the piston head to move towards the center line of the feeding table; the first piston cylinder is filled with hydraulic oil; The piston head is provided with an oil guiding hole penetrating along its axial direction and a sealing hole communicated with the oil guiding hole, a sealing piston is arranged in the sealing hole, and a return spring for pushing the sealing piston away from the oil guiding hole is arranged; A second piston cylinder is arranged at the central position of the feeding table, a second connecting rod is slidably arranged in the second piston cylinder, the lower end of the second connecting rod forms a second sealing cavity with the second piston cylinder, and the second sealing cavity is communicated with the sealing hole.

2. The multi-guide large gantry band sawing machine according to claim 1, characterized in that, Three feeding tracks are arranged, pulleys cooperating with the feeding tracks are arranged at the bottom of the feeding table, and annular grooves cooperating with the tracks are arranged on the pulleys.

3. The multi-guide large gantry band sawing machine according to claim 2, characterized in that, Anti-detachment plates are arranged at both the front and rear ends of the feeding table, the feeding track is an I-shaped track, a bayonet cooperating with the track is arranged on the anti-detachment plate, an anti-detachment block that contracts inwards is arranged at the opening of the bayonet, and the anti-detachment block is clamped on the waist of the I-shaped rod.

4. The multi-guide large gantry band sawing machine according to claim 1, characterized in that, A number of transversely arranged T-shaped bars are arranged along the length direction of the feeding table, and a gap is arranged between adjacent T-shaped bar brackets.

5. The multi-guide large gantry band sawing machine according to any one of claims 1 to 4, with every two active clamping devices set as a group, and a group of active clamping devices are respectively arranged on both sides in the width direction of the gantry.

6. The multi-guide large gantry band sawing machine according to any one of claims 1 to 4, characterized in that, The anti-rolling block is triangular, with every two anti-rolling blocks as a group, and the two anti-rolling blocks in each group are symmetrically arranged on both sides of the center line of the feeding table.

7. The multi-guide large gantry band sawing machine according to claim 6, characterized in that, The anti-rolling block is slidably arranged along the width direction of the feeding table; the first piston rod is fixedly arranged at the bottom of the feeding table; a number of oil guiding holes penetrating along its axial direction are arranged in the circumferential direction of the piston head, a sealing hole communicated with the oil guiding hole is arranged in the radial direction inside the piston head, a first channel is arranged inside the first connecting rod, and one end of the first channel is communicated with the sealing hole; a pressurizing piston is arranged at the lower end of the second connecting rod, a second spring is arranged between the pressurizing piston and the bottom of the second piston cylinder, the pressurizing piston and the second piston cylinder form a second sealing cavity, hydraulic oil is arranged in the second sealing cavity, and the second sealing cavity is communicated with the first channel through a oil pipe.

8. The multi-guide large gantry band sawing machine according to any one of claims 1 to 4, characterized in that, A stop device is arranged at the end of the feeding table, and the stop device includes: a stop frame and a stop oil cylinder, the two sides of the bottom of the stop frame are rotatably arranged on the side wall of the feeding table, one end of the stop oil cylinder is connected to the feeding table, and the other end of the stop oil cylinder is connected to the bottom of the guide frame.

9. The multi-guide large gantry band sawing machine according to claim 8, characterized in that, A magnetic adsorption fixing device is arranged at the upper end of the stop frame, and a switch wrench is arranged on the magnetic adsorption fixing device, and the switch wrench is used to control the magnetic adsorption fixing device to generate magnetic attraction.

10. The multi-guide large gantry band sawing machine according to any one of claims 1 to 4, characterized in that, It further includes a maintenance ladder, and the maintenance ladder includes longitudinal ladders arranged on both sides of the feeding track, and the upper ends of the longitudinal ladders are connected by a transverse ladder.

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