A diaphragm cutting device for manufacturing steel box beams

Abstract

The present invention belongs to the technical field of cutting equipment, and in particular relates to a diaphragm cutting device for steel box girder manufacturing, comprising a base, a conveying mechanism, an automatic cutting mechanism, two sets of extrusion limiting mechanisms, a plate thickness feedback mechanism, a plate cutting position feedback mechanism, a pre-cutting start mechanism, and a cutting feed speed follow-up control mechanism. The present invention can automatically transfer the steel plates to be cut to continuously produce multiple diaphragms, can determine the remaining cutting space of the steel plates based on the required cutting diaphragm width and feedback signals, can also automatically adjust the extrusion limiting force based on the thickness of the steel plates to avoid deformation and residual stress of thin steel plates, and can also confirm whether to pre-cut based on the thickness and hardness of the steel plates to prevent cracking and roughness during cutting. It can also automatically adjust the feed speed based on the cutting resistance of the disc cutter to prevent damage to the tool due to overload.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting equipment, and in particular relates to a diaphragm cutting device for manufacturing steel box girders. Background Art

[0002] The diaphragm cutting device is a special equipment used to accurately cut diaphragms (transverse supporting members inside the steel box girder) during the steel box girder manufacturing process. The diaphragm needs to be cut into matching sizes according to the cross-sectional dimensions of the steel box girder.

[0003] At present, when cutting steel plates, most people directly use full-width cutting. For thicker and harder steel plates, their tensile strength is greater. When the disc cutter cuts in with the full width, the cutting force is concentrated on the contact line between the blade and the plate, and the stress concentration inside the steel plate is more significant (for every 10mm increase in thickness, the cutting stress increases by 30%). Direct full-width cutting of the steel plate can easily cause the edge of the steel plate to crack, resulting in a larger crack depth. In addition, when cutting with the full width, the blade bears the combined load of radial force and axial force, and the shear resistance is greater, resulting in tool vibration due to sudden changes in cutting load, stress concentration causing material tearing, and rapid wear of the tool forming a vicious cycle, resulting in a significant increase in the roughness of the cutting surface. Summary of the Invention

[0004] The purpose of the present invention is to provide a diaphragm cutting device for manufacturing steel box girders in order to solve the above problems.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a transverse diaphragm cutting device for manufacturing a steel box girder, comprising a base and further comprising:

[0006] A conveying mechanism, fixedly mounted on the upper end of the base, for conveying the steel plate;

[0007] An automatic cutting mechanism is fixedly mounted on the upper end of the base and is covered outside the conveying mechanism;

[0008] Two sets of extrusion limiting mechanisms are fixedly mounted on the inner wall of the automatic cutting mechanism and are used to fix the steel plates to be cut;

[0009] A plate thickness feedback mechanism is fixedly installed inside one of the extrusion limiter mechanisms and is used to obtain thickness information of the steel plate to be cut;

[0010] A plate cutting position feedback mechanism is fixedly mounted on the outer wall of the extrusion limiting mechanism;

[0011] A pre-cutting start mechanism is fixedly mounted on the upper end of the automatic cutting mechanism and automatically determines whether pre-cutting is required based on the thickness and hardness information of the steel plate to be cut;

[0012] The cutting feed speed follow-up regulating mechanism is fixedly mounted on the inner wall of the pre-cutting starting mechanism and is electrically connected to the automatic cutting mechanism.

[0013] In the above-mentioned transverse diaphragm cutting device for manufacturing steel box girders, the conveying mechanism includes a roller conveyor fixedly installed on the upper end of the base, and a cutting table corresponding to the position of the automatic cutting mechanism is also fixedly installed on the roller conveyor. A cutting groove is provided at the upper end of the cutting table, and side guards are also fixedly connected to the front and rear sides of the upper end of the roller conveyor.

[0014] In the above-mentioned transverse diaphragm cutting device for manufacturing steel box girders, the automatic cutting mechanism includes a U-shaped support plate fixedly connected to the upper end of the base, an electric slide rail is fixedly installed on the lower end of the horizontal part of the U-shaped support plate, and the lower end of the slider in the electric slide rail is fixedly connected to a mounting bracket, an electric push rod is fixedly installed on the mounting bracket, and a disc cutting knife is fixedly connected to the lower movable end of the electric push rod.

[0015] In the above-mentioned transverse diaphragm cutting device for manufacturing steel box girders, the extrusion limiting mechanism includes a supporting plate fixedly connected to the inner wall of the U-shaped support plate, and a plurality of extrusion rods are movably inserted on the surface of the supporting plate, and the lower ends of the plurality of extrusion rods are fixedly connected to the same extrusion plate, and a plurality of extrusion springs sleeved outside the extrusion rods are fixedly connected between the extrusion plate and the supporting plate, and the upper ends of the plurality of extrusion rods are fixedly connected to the same push-pull plate, and the upper end of the supporting plate is fixedly connected to a cover shell sleeved outside the push-pull plate, and the upper end of the push-pull plate is fixedly connected to positive and negative permanent magnet plates, and positive and negative electromagnetic plates are fixedly installed on the top of the inner wall of the cover shell.

[0016] In the above-mentioned diaphragm cutting device for manufacturing steel box girders, the plate thickness feedback mechanism includes a feedback resistor rod fixedly mounted on one side of the inner wall of the cover shell, the feedback resistor rod is arranged parallel to the extrusion rod, and one side of the push-pull plate is fixedly connected to a feedback conductive connector that is in electrical contact with the feedback resistor rod.

[0017] In the above-mentioned diaphragm cutting device for manufacturing steel box girders, the plate cutting into position feedback mechanism includes a feedback shell fixedly connected to the outer wall of the cover shell, the lower end of the feedback shell is movably inserted with a resistance rod, the upper end of the resistance rod is fixedly connected with a lifting plate, and a tension spring sleeved on the outside of the resistance rod is fixedly connected between the lifting plate and the feedback shell, the upper end of the lifting plate is fixedly installed with a force-bearing permanent magnet plate, the top of the inner wall of the feedback shell is fixedly installed with a force-applying electromagnetic plate arranged opposite to the force-bearing permanent magnet plate, the lower side of the inner wall of the feedback shell is fixedly installed with an in-position switch, and one side of the lifting plate is fixedly connected with a pressing round head arranged corresponding to the position of the in-position switch.

[0018] In the above-mentioned diaphragm cutting device for manufacturing steel box girders, the pre-cutting starting mechanism includes a starting shell fixedly connected to the upper end of the U-shaped support plate, a plurality of first guide slide rods arranged side by side are fixedly connected to the lower side of the inner wall of the starting shell, a plurality of the first guide slide rods are externally slidably sleeved with the same first sliding plate, a plurality of first return springs sleeved outside the first guide slide rod are fixedly connected between the first sliding plate and the starting shell, a first thrust permanent magnet plate is fixedly connected to the side wall of the first sliding plate, a first thrust electromagnetic plate arranged opposite to the first thrust permanent magnet plate is fixedly connected to the inner wall of the starting shell, and a plurality of A second guide slide bar is arranged side by side, and multiple second guide slide bars are slidably sleeved with the same second sliding plate. Multiple second return springs sleeved outside the second guide slide bar are fixedly connected between the second sliding plate and the starting shell. The side wall of the second sliding plate is fixedly connected with a second thrust permanent magnet plate. The inner wall of the starting shell is fixedly connected with a second thrust electromagnetic plate arranged opposite to the second thrust permanent magnet plate. Multiple second guide slide bars are also slidably sleeved with the same compensation plate. Multiple compensation springs sleeved outside the second guide slide bar are fixedly connected between the compensation plate and the second sliding plate. The side of the compensation plate close to the first sliding plate is fixedly connected to a starting switch.

[0019] In the above-mentioned transverse diaphragm cutting device for manufacturing steel box girders, the cutting feed speed follow-up control mechanism includes a control resistor rod fixedly mounted on the top of the inner wall of the starting shell, the control resistor rod is arranged parallel to the second guide slide rod, and the upper end of the second sliding plate is fixedly connected to a control conductive connector that is in electrical contact with the control resistor rod.

[0020] 1. Through the provided conveying mechanism, automatic cutting mechanism and plate cutting position feedback mechanism, the steel plates to be cut can be automatically transferred to realize the continuous cutting production of multiple transverse partitions, and the width of the transverse partitions to be cut can be combined to confirm whether there is still cutting space for the steel plates, and timely feedback signals can be provided to ensure production continuity.

[0021] 2. Through the set extrusion limit mechanism and plate thickness feedback mechanism, the extrusion limit force can be automatically adjusted based on the thickness of the steel plate to be cut. On the premise of ensuring that the steel plate can be firmly limited to avoid displacement affecting the cutting accuracy, it also avoids the problem that excessive clamping force can easily cause plastic deformation of thinner steel plates, induce residual stress and lead to deterioration of cutting quality.

[0022] 3. Through the pre-cutting start mechanism, plate thickness feedback mechanism and automatic cutting mechanism, it can automatically confirm whether the pre-cutting process is needed based on the thickness and hardness of the steel plate, avoiding the problems of cracking and large roughness when cutting the steel plate.

[0023] 4. Through the setting of cutting feed speed follow-up control mechanism and automatic cutting mechanism, the cutting feed speed can be automatically adjusted based on the cutting resistance suffered by the disc cutter during the cutting process to prevent the tool from being overloaded and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the conveying mechanism of the present invention;

[0027] Figure 4 It is a front view structural schematic diagram of the conveying mechanism of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the automatic cutting mechanism of the present invention;

[0029] Figure 6 It is a schematic cross-sectional view of the extrusion limiting mechanism of the present invention;

[0030] Figure 7 This is a schematic cross-sectional view of the panel cutting position feedback mechanism of the present invention;

[0031] Figure 8 It is a schematic cross-sectional view of the pre-cutting starting mechanism of the present invention.

[0032] In the figure: 1 base, 2 conveying mechanism, 21 roller conveyor, 22 cutting table, 23 cutting groove, 24 side baffle, 3 automatic cutting mechanism, 31 U-shaped support plate, 32 electric slide rail, 33 mounting bracket, 34 electric push rod, 35 disc cutting knife, 4 extrusion limit mechanism, 41 supporting plate, 42 extrusion rod, 43 extrusion plate, 44 extrusion spring, 45 push-pull plate, 46 cover, 47 positive and negative permanent magnetic plate, 48 positive and negative electromagnetic plate, 5 plate thickness feedback mechanism, 51 feedback resistor rod, 52 feedback conductive contact piece, 6 plate cutting position feedback mechanism, 61 feedback shell, 62 contact rod, 63 lifting plate, 64 tension spring, 65 force-bearing permanent magnet plate, 66 force-adding electromagnetic plate, 67 in-position switch, 68 pressing round head, 7 pre-cutting starting mechanism, 71 starting shell, 72 first guide slide bar, 73 first sliding plate, 74 first return spring, 75 first thrust permanent magnet plate, 76 first thrust electromagnetic plate, 77 second guide slide bar, 78 second sliding plate, 79 second return spring, 710 second thrust permanent magnet plate, 711 second thrust electromagnetic plate, 712 compensation plate, 713 compensation spring, 714 starting switch, 8 cutting feed speed follow-up control mechanism, 81 control resistance rod, 82 control conductive contact. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] like Figures 1-8 As shown, a diaphragm cutting device for manufacturing a steel box girder includes a base 1 and further includes:

[0035] The conveying mechanism 2 is fixedly mounted on the upper end of the base 1 and is used for transferring the steel plate. The conveying mechanism 2 includes a roller conveyor 21 fixedly mounted on the upper end of the base 1. A cutting table 22 corresponding to the position of the automatic cutting mechanism 3 is also fixedly mounted on the roller conveyor 21. A cutting groove 23 is provided at the upper end of the cutting table 22. Side guards 24 are also fixedly connected to the front and rear sides of the upper end of the roller conveyor 21.

[0036] The automatic cutting mechanism 3 is fixedly mounted on the upper end of the base 1 and is covered over the outside of the conveying mechanism 2. The automatic cutting mechanism 3 includes a U-shaped support plate 31 fixedly connected to the upper end of the base 1. An electric slide rail 32 is fixedly mounted on the lower end of the horizontal part of the U-shaped support plate 31. The lower end of the slider in the electric slide rail 32 is fixedly connected to a mounting bracket 33. An electric push rod 34 is fixedly mounted on the mounting bracket 33. The lower movable end of the electric push rod 34 is fixedly connected to a disc cutting knife 35.

[0037] Two groups of extrusion limiting mechanisms 4 are fixedly mounted on the inner wall of the automatic cutting mechanism 3 and are used to fix the steel plate to be cut. The extrusion limiting mechanism 4 includes a supporting plate 41 fixedly connected to the inner wall of the U-shaped support plate 31. A plurality of extrusion rods 42 are movably inserted on the surface of the supporting plate 41. The lower ends of the plurality of extrusion rods 42 are fixedly connected to the same extrusion plate 43. A plurality of extrusion springs 44 sleeved on the outside of the extrusion rods 42 are fixedly connected between the extrusion plate 43 and the supporting plate 41. The upper ends of the plurality of extrusion rods 42 are fixedly connected to the same push-pull plate 45. The upper end of the supporting plate 41 is fixedly connected to a cover shell 46 sleeved on the outside of the push-pull plate 45. The upper end of the push-pull plate 45 is fixedly connected to positive and negative permanent magnet plates 47. The top of the inner wall of the cover shell 46 is fixedly provided with positive and negative electromagnetic plates 48.

[0038] The plate thickness feedback mechanism 5 is fixedly installed inside one group of extrusion limit mechanisms 4 and is used to obtain the thickness information of the steel plate to be cut. The plate thickness feedback mechanism 5 includes a feedback resistor rod 51 fixedly installed on one side of the inner wall of the cover shell 46. The feedback resistor rod 51 is arranged parallel to the extrusion rod 42, and one side of the push-pull plate 45 is fixedly connected to a feedback conductive contact 52 that is in electrical contact with the feedback resistor rod 51.

[0039] The plate cutting into position feedback mechanism 6 is fixedly mounted on the outer wall of the extrusion limiting mechanism 4. The plate cutting into position feedback mechanism 6 includes a feedback shell 61 fixedly connected to the outer wall of the cover shell 46. The lower end of the feedback shell 61 is movably inserted with a resistance rod 62. The upper end of the resistance rod 62 is fixedly connected with a lifting plate 63. A tension spring 64 sleeved on the outside of the resistance rod 62 is fixedly connected between the lifting plate 63 and the feedback shell 61. A force-bearing permanent magnet plate 65 is fixedly mounted on the upper end of the lifting plate 63. A force-applying electromagnetic plate 66 arranged opposite to the force-bearing permanent magnet plate 65 is fixedly mounted on the top of the inner wall of the feedback shell 61. An in-position switch 67 is fixedly mounted on the lower side of the inner wall of the feedback shell 61. A pressing round head 68 corresponding to the position of the in-position switch 67 is fixedly connected to one side of the lifting plate 63.

[0040] The pre-cutting starting mechanism 7 is fixedly mounted on the upper end of the automatic cutting mechanism 3, and automatically determines whether pre-cutting is required based on the thickness information and hardness information of the steel plate to be cut. The pre-cutting starting mechanism 7 includes a starting shell 71 fixedly connected to the upper end of the U-shaped support plate 31, and a plurality of first guide slide bars 72 arranged side by side are fixedly connected to the lower side of the inner wall of the starting shell 71. The plurality of first guide slide bars 72 are externally slidably sleeved with the same first sliding plate 73, and a plurality of first return springs 74 sleeved on the outside of the first guide slide bar 72 are fixedly connected between the first sliding plate 73 and the starting shell 71. The side wall of the first sliding plate 73 is fixedly connected to a first thrust permanent magnet plate 75, and the inner wall of the starting shell 71 is fixedly connected to a first thrust electromagnetic plate 76 arranged opposite to the first thrust permanent magnet plate 75. There are also multiple second guide slides 77 arranged side by side fixedly connected, and the same second sliding plate 78 is slidably sleeved on the outside of the multiple second guide slides 77. Multiple second return springs 79 sleeved on the outside of the second guide slide 77 are fixedly connected between the second sliding plate 78 and the starting shell 71. The side wall of the second sliding plate 78 is fixedly connected to the second thrust permanent magnet plate 710. The inner wall of the starting shell 71 is fixedly connected to the second thrust electromagnetic plate 711 arranged opposite to the second thrust permanent magnet plate 710. The multiple second guide slides 77 are also slidably sleeved with the same compensation plate 712. Multiple compensation springs 713 sleeved on the outside of the second guide slide 77 are fixedly connected between the compensation plate 712 and the second sliding plate 78. The side of the compensation plate 712 close to the first sliding plate 73 is fixedly connected to the starting switch 714.

[0041] The cutting feed speed follow-up control mechanism 8 is fixedly mounted on the inner wall of the pre-cutting start mechanism 7 and is electrically connected to the automatic cutting mechanism 3. The cutting feed speed follow-up control mechanism 8 includes a control resistor rod 81 fixedly mounted on the top of the inner wall of the start shell 71. The control resistor rod 81 is arranged parallel to the second guide slide rod 77. The upper end of the second sliding plate 78 is fixedly connected to a control conductive contact 82 that is in electrical contact with the control resistor rod 81.

[0042] The operating principle of the present invention is described as follows: the steel plate to be cut is placed on the roller conveyor 21, which pushes the steel plate forward by friction, so that the steel plate is quickly moved to the cutting position. The moving speed of the roller conveyor 21 is set to a fixed value, and the forward displacement of the steel plate is precisely adjusted by controlling its working time.

[0043] The PLC controller 46 is used to control the feeder 43 to move the steel plate upwards, so that the feeder 43 can move the steel plate upwards, and the feeder 43 can move the steel plate upwards, so that the feeder 43 can move the steel plate upwards, and the feeder 43 can move the steel plate upwards, so that the feeder 43 can move the steel plate upwards, and the feeder 43 can move the steel plate upwards, so that the feeder 43 can move the steel plate upwards, and the feeder 43 can move the steel plate upwards, and the feeder 43 can move the steel plate upwards, so that the feeder 43 can move the steel plate upwards, and the feeder 43 can move the steel plate upwards, When the thickness of the steel plate to be cut is greater, the relative downward movement distance of the push-pull plate 45 is smaller, and thus the sliding distance of the feedback conductive contact 52 on the feedback resistor rod 51 is smaller, so that the access resistance of the feedback resistor rod 51 is smaller, and the feedback conductive contact 52 and the feedback resistor rod 51 are connected in series to the power supply circuit of the positive and negative electromagnetic plates 48, so that the current flow of the positive and negative electromagnetic plates 48 is greater, so that the positive and negative electromagnetic plates 48 generate a greater magnetic thrust relative to the positive and negative permanent magnet plates 47, so that the extrusion plate 43 applies a greater pressure to the steel plate, thereby ensuring that the steel plate is fixed more firmly, because the thicker the steel plate is, the greater the cutting force generated during cutting, and the thick plate has high rigidity and strong deformation resistance, so a greater clamping and fixing force is required to balance the cutting force and prevent the plate from displacement; while the strength and rigidity of thinner steel plates are lower, excessive clamping and fixing force can easily cause plastic deformation, induce residual stress, and lead to deterioration of cutting quality, and may also amplify cutting vibration due to resonance, so excessive clamping and fixing force is not used for thin steel plates;

[0044] After the steel plate is fixed, the PLC controller controls the automatic cutting mechanism 3 to operate, and the electric push rod 34 pushes the disc cutter 35 downward, so that the disc cutter 35 contacts the steel plate. The disc cutter 35 rotates at high speed to generate a cutting force on the steel plate. The electric slide rail 32 can adjust the position of the disc cutter 35, so that the disc cutter 35 can quickly cut the steel plate. A torque sensor is installed at the power end of the disc cutter 35, which can provide real-time feedback on the cutting resistance during the cutting process.

[0045] The feedback conductive contact 52 and the feedback resistor rod 51 are also connected in series to the power supply circuit of the first thrust electromagnetic plate 76. When the thickness of the steel plate increases, the access resistance of the feedback resistor rod 51 becomes smaller, and the amount of current flowing into the first thrust electromagnetic plate 76 becomes larger. When the first thrust electromagnetic plate 76 is energized, it generates the same but greater magnetism as the first thrust permanent magnet plate 75, thereby applying a greater magnetic thrust to the first sliding plate 73. The first sliding plate 73 slides a greater distance along the first guide slide bar 72. When the thickness of the steel plate is greater than 16 mm, the first sliding plate 73 presses on the start switch 714, indicating that pre-cutting can be performed. That is, instead of directly cutting the steel plate in full width, an initial incision is first pre-cut at its upper end. This allows the stress concentration area to be transferred from the surface of the steel plate to the bottom of the incision during cutting, significantly reducing the stress concentration factor during subsequent full-width cutting, thereby significantly reducing the incidence of edge cracks.

[0046] The PLC controller also controls the power supply device to supply power to the second thrust electromagnetic plate 711 based on the value of the torque sensor at the power end of the disc cutter 35 when the disc cutter 35 initially cuts. When the value of the torque sensor is larger, it means that the cutting resistance of the steel plate to the disc cutter 35 is greater, and the hardness of the steel plate is greater. At this time, the PLC controller controls the power supply device to supply a larger current to the second thrust electromagnetic plate 711. Similarly, the second sliding plate 78 slides a larger distance, so that the distance between the start switch 714 and the first sliding plate 73 becomes smaller. That is, when the hardness of the steel plate is greater, the thickness threshold of the steel plate is set smaller than 16mm, which also triggers the pre-cutting work. Because the tensile strength of the steel plate with greater hardness is also greater, the greater the cutting resistance, the greater the concentrated stress, and the pre-cutting process is also required to ensure the cutting quality. Therefore, when the thickness of the steel plate is insufficient, the pre-cutting work is also required when the hardness of the steel plate is too large.

[0047] The pre-cutting depth is determined based on the thickness and hardness of the steel plate. The basic formula is h=k×t, where h is the pre-cutting depth, k is the hardness coefficient of the steel plate, and t is the thickness of the steel plate. The value of k is determined based on the value of the torque sensor feedback in the disc cutter 35. The larger the value of the torque sensor feedback, the larger the coefficient. The range of k is between 0.3 and 0.5, that is, the greater the hardness of the steel plate, the higher the coefficient. The thickness of the steel plate is deduced based on the resistance value of the feedback resistor rod 51 using the calculation and analysis module in the PLC controller to obtain the pre-cutting depth. After completing the pre-cutting work at the set pre-cutting depth, the disc cutter 35 is used to perform full-width cutting on the steel plate.

[0048] During the sliding of the second sliding plate 78, the regulating conductive contact 82 will also be driven to slide on the regulating resistor rod 81. Specifically, when the hardness of the steel plate is greater, the cutting resistance of the disc cutter 35 will be greater, and the torque value of the torque sensor at the power end of the disc cutter 35 will be greater. The PLC controller will control the second sliding plate 78 to slide a greater distance, thereby causing the regulating conductive contact 82 to slide a greater distance on the regulating resistor rod 81, so that the access resistance of the regulating resistor rod 81 is greater, and the regulating conductive contact 82 and the regulating resistor rod 81 are connected in series in the power supply circuit of the electric slide 32. Since the electric slide 32 is a DC device, when the access resistance of the regulating resistor rod 81 increases, its movement speed will slow down accordingly, thereby reducing the cutting feed speed, thereby preventing the tool from being overloaded and damaged.

[0049] During the transfer of the steel plate, the resistance rod 62 is always in contact with the upper end of the steel plate due to the action of the tension spring 64. By controlling the single working time of the roller conveyor 21, the forward displacement of the steel plate can be precisely controlled, so that a cross-partition of precise width can be cut. When the final remaining amount of the steel plate cannot meet the needs of continued cutting, that is, before the roller conveyor 21 completes a single working time, the remaining amount of the steel plate is insufficient, and the resistance rod 62 moves downward under the action of the tension spring 64 because there is no steel plate to block it, thereby causing the pressing round head 68 on one side of the lifting plate 63 to press on the in-place switch 67, indicating that the steel plate is insufficient for continued cutting. The PLC controller promptly sends an alarm signal to remind the staff to take corresponding measures to avoid the problem of discontinuous production due to lack of materials.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A diaphragm cutting device for manufacturing a steel box girder, comprising a base (1), characterized in that: Also includes: A conveying mechanism (2) is fixedly mounted on the upper end of the base (1) and is used for conveying the steel plate; An automatic cutting mechanism (3) is fixedly mounted on the upper end of the base (1) and is covered outside the conveying mechanism (2), wherein the automatic cutting mechanism (3) comprises a U-shaped support plate (31) fixedly connected to the upper end of the base (1); Two sets of extrusion limiting mechanisms (4) are fixedly mounted on the inner wall of the automatic cutting mechanism (3) and are used to fix the steel plate to be cut; A plate thickness feedback mechanism (5) is fixedly mounted inside one of the extrusion limiting mechanisms (4) and is used to obtain thickness information of the steel plate to be cut; A plate cutting position feedback mechanism (6) fixedly mounted on the outer wall of the extrusion limiting mechanism (4); A pre-cutting starting mechanism (7) is fixedly mounted on the upper end of the automatic cutting mechanism (3) and automatically determines whether a pre-cutting action is required based on thickness information and hardness information of the steel plate to be cut; A cutting feed speed follow-up regulating mechanism (8) is fixedly mounted on the inner wall of the pre-cutting starting mechanism (7) and is electrically connected to the automatic cutting mechanism (3); The extrusion limiting mechanism (4) includes a supporting plate (41) fixedly connected to the inner wall of the U-shaped support plate (31), a plurality of extrusion rods (42) are movably inserted on the surface of the supporting plate (41), the lower ends of the plurality of extrusion rods (42) are fixedly connected to the same extrusion plate (43), a plurality of extrusion springs (44) sleeved outside the extrusion rods (42) are fixedly connected between the extrusion plate (43) and the supporting plate (41), the upper ends of the plurality of extrusion rods (42) are fixedly connected to the same push-pull plate (45), the upper end of the supporting plate (41) is fixedly connected to a cover (46) sleeved outside the push-pull plate (45), the upper end of the push-pull plate (45) is fixedly connected to positive and negative permanent magnetic plates (47), and the top of the inner wall of the cover (46) is fixedly provided with positive and negative electromagnetic plates (48); The plate thickness feedback mechanism (5) includes a feedback resistor rod (51) fixedly mounted on one side of the inner wall of the housing (46), the feedback resistor rod (51) being arranged in parallel with the extrusion rod (42), and a feedback conductive contact (52) in electrical contact with the feedback resistor rod (51) being fixedly connected to one side of the push-pull plate (45).

2. A diaphragm cutting device for manufacturing a steel box girder according to claim 1, characterized in that: The conveying mechanism (2) comprises a roller conveyor (21) fixedly mounted on the upper end of the base (1); a cutting table (22) corresponding to the position of the automatic cutting mechanism (3) is fixedly mounted on the roller conveyor (21); a cutting groove (23) is provided at the upper end of the cutting table (22); and side baffles (24) are fixedly connected to the front and rear sides of the upper end of the roller conveyor (21).

3. The diaphragm cutting device for manufacturing a steel box girder according to claim 1, characterized in that: An electric slide rail (32) is fixedly mounted on the lower end of the horizontal portion of the U-shaped support plate (31); a mounting bracket (33) is fixedly connected to the lower end of the slider in the electric slide rail (32); an electric push rod (34) is fixedly mounted on the mounting bracket (33); and a disc cutter (35) is fixedly connected to the lower movable end of the electric push rod (34).

4. The diaphragm cutting device for manufacturing a steel box girder according to claim 1, characterized in that: The plate cutting in place feedback mechanism (6) includes a feedback shell (61) fixedly connected to the outer wall of the cover shell (46), a resistance rod (62) movably inserted into the lower end of the feedback shell (61), a lifting plate (63) fixedly connected to the upper end of the resistance rod (62), a tension spring (64) sleeved on the outside of the resistance rod (62) fixedly connected between the lifting plate (63) and the feedback shell (61), a force-bearing permanent magnet plate (65) fixedly installed on the upper end of the lifting plate (63), a force-applying electromagnetic plate (66) arranged opposite to the force-bearing permanent magnet plate (65) fixedly installed on the top of the inner wall of the feedback shell (61), an in-place switch (67) fixedly installed on the lower side of the inner wall of the feedback shell (61), and a pressing round head (68) arranged corresponding to the position of the in-place switch (67) fixedly connected to one side of the lifting plate (63).

5. The diaphragm cutting device for manufacturing a steel box girder according to claim 3, characterized in that: The pre-cutting starting mechanism (7) includes a starting shell (71) fixedly connected to the upper end of the U-shaped support plate (31), a plurality of first guide slide bars (72) arranged side by side are fixedly connected to the lower side of the inner wall of the starting shell (71), a plurality of first guide slide bars (72) are slidably sleeved on the outside of the plurality of first guide slide bars (72), a plurality of first return springs (74) sleeved on the outside of the first guide slide bars (72) are fixedly connected between the first slide plate (73) and the starting shell (71), a first thrust permanent magnet plate (75) is fixedly connected to the side wall of the first slide plate (73), a first thrust electromagnetic plate (76) arranged opposite to the first thrust permanent magnet plate (75) is fixedly connected to the inner wall of the starting shell (71), and a plurality of second guide slide bars (77) arranged side by side are fixedly connected to the upper side of the inner wall of the starting shell (71), and a plurality of second guide slide bars (77) are slidably sleeved on the outside of the plurality of first guide slide bars (72). A second sliding plate (78) is slidably sleeved outside the sliding rod (77), a plurality of second return springs (79) sleeved outside the second guide sliding rod (77) are fixedly connected between the second sliding plate (78) and the starting shell (71), a second thrust permanent magnet plate (710) is fixedly connected to the side wall of the second sliding plate (78), a second thrust electromagnetic plate (711) arranged opposite to the second thrust permanent magnet plate (710) is fixedly connected to the inner wall of the starting shell (71), a plurality of second guide sliding rods (77) are also slidably sleeved with a same compensation plate (712), a plurality of compensation springs (713) sleeved outside the second guide sliding rod (77) are fixedly connected between the compensation plate (712) and the second sliding plate (78), and a starting switch (714) is fixedly connected to the side of the compensation plate (712) close to the first sliding plate (73).

6. A diaphragm cutting device for manufacturing a steel box girder according to claim 5, characterized in that: The cutting feed speed follow-up control mechanism (8) includes a control resistor rod (81) fixedly mounted on the top of the inner wall of the starting shell (71), the control resistor rod (81) is arranged parallel to the second guide slide bar (77), and the upper end of the second sliding plate (78) is fixedly connected to a control conductive contact (82) that is in electrical contact with the control resistor rod (81).

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