Steel structure bending machine

Abstract

The present invention belongs to the technical field of steel structure processing, and in particular, relates to a bending machine for processing steel structures, including a machine platform and a gantry installed on the end face of the machine platform, a controller is installed on the side wall of the gantry, and also includes: two flaps, both flaps are hinged on the end face of the machine platform, and the end face of the machine platform is located between the two flaps and is provided with a bending clearance groove; a flip push unit is installed on the end face of the machine platform, and is used to push the two flaps to flip toward each other. The present invention can avoid the formation of strip-shaped depressions on the outside of the bending part of the steel plate as much as possible, avoid affecting the structural stability of the subsequent steel structure, and is conducive to improving the accuracy of the bending angle of the steel plate, and can reduce the possibility of cracks in the bending of the steel plate, and can also promptly remind personnel when cracks are generated in the bending. At the same time, based on the pressure applied by the downward bending and the surface roughness of the bending part of the steel plate, it can promptly remind personnel to replace or repair the excessively worn bending knife.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure processing, in particular to a bending machine for processing steel structures. Background Art

[0002] In steel structure processing, the bending machine is a key equipment. It applies pressure to various types of steel by precisely controlling the movement of the mold to bend them at preset angles. The bending machine is suitable for the forming of a variety of steel structure components and can meet different design requirements, providing strong technical support for the efficient and precise creation of steel structure components.

[0003] At present, steel plates can be bent into various shapes, such as the connection nodes of beams and columns, and are one of the indispensable components in steel structures. When bending, a bending machine is needed, such as a steel plate bending machine for steel structure buildings disclosed in patent announcement number CN109590354B;

[0004] When the upper mold applies downward pressure to the bending part of the steel plate during the bending process, the parts of the steel plate on both sides of the bending position are often prone to long strip-shaped concave deformation on the outer surface due to the combined effect of their own gravity and the edges of the lower mold (refer to Figure 1 and Figure 2 , a is the bending pressure point, b is the long strip-shaped depression). This depression not only greatly reduces the appearance of the steel plate, but also may affect the structural strength of the subsequent steel structure. In addition, when bending thick steel plates (the plate thickness is usually above 4mm), the thicker the plate, the greater the tensile force on the outside of the bend, which makes the stress in the bending area highly concentrated. If the quality of the steel used itself has certain deviations, such as impurities inside or poor material uniformity, then cracks are likely to occur on the outside of the bend, seriously affecting the quality and performance of the steel plate, and affecting the structural strength of the steel structure. Summary of the invention

[0005] The object of the present invention is to provide a bending machine for steel structure processing in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: A bending machine for processing steel structure, comprising a machine platform and a gantry installed on the end surface of the machine platform, a controller is installed on the side wall of the gantry, and also includes:

[0007] Two flaps are both hinged to the end surface of the machine platform, and a bending and giving way groove is provided at the end surface of the machine platform between the two flaps;

[0008] A flipping and pushing unit is installed on the end surface of the machine platform and is used to push the two flaps to flip towards each other;

[0009] A downward bending unit is installed at the center of the gantry and is arranged just above the bending clearance groove;

[0010] An air cavity is provided inside the gantry, a cavity wall of the air cavity is provided with a plurality of air jet holes, and each of the air jet holes is provided on one side of the bending and giving way groove, and the machine is provided with a heating air supply unit, and the heating air supply unit is used to deliver hot air to the air cavity;

[0011] The auxiliary cleaning unit is installed on the side wall of the gantry away from the air cavity, and a recording mechanism is installed inside the heating and air supply unit, and the controller controls the recording mechanism to work according to the electrical signal output by the auxiliary cleaning unit;

[0012] A wear warning unit is arranged below the machine platform and is connected to the air outlet of the heating air supply unit. The controller controls the operation of the wear warning unit according to the electrical signals output by the recording mechanism and the pressing and bending unit.

[0013] The heating detection unit is installed on the end surfaces of the two flaps.

[0014] Preferably, the flipping and pushing unit includes two mounting holes opened on the end surface of the machine, and the two mounting holes are both arranged below the corresponding flaps, mounting plates are fixedly installed inside the two mounting holes, and the end surfaces of the two mounting plates are fixedly plugged with push-up electric cylinders, the telescopic ends of the two push-up electric cylinders are fixedly installed with support balls, the lower ends of the two flaps are slidably connected to sliding seats, and the lower ends of the sliding seats are rotatably connected to the support balls, and the two push-up electric cylinders are electrically connected to the controller.

[0015] Preferably, the downward-pressing bending unit comprises a plurality of downward-pushing electric cylinders fixedly plugged into the end face of the gantry, and a fixing plate is commonly installed at the telescopic end of each downward-pushing electric cylinder, a mounting seat is provided below the fixing plate, and a pressure detector is provided between the fixing plate and the mounting seat, a bending knife is detachably installed on the mounting seat, and the downward-pushing electric cylinder and the pressure detector are both electrically connected to the controller.

[0016] Preferably, the heating air supply unit includes a sealing cover fixedly mounted on the bottom of the machine, and an electric heater is installed inside the sealing cover, an air pump is fixedly mounted on the bottom of the sealing cover, and an air delivery pipe is installed at the air delivery end of the air pump, the air delivery pipe is connected to the sealing cover, a connecting pipe is fixedly plugged into the side wall of the sealing cover, and the connecting pipe is connected to the inside of the air cavity, and the electric heater and the air pump are both electrically connected to the controller.

[0017] Preferably, the auxiliary cleaning unit includes an adjustment hole provided in the side wall of the gantry, an adjustment block is slidably provided inside the adjustment hole, the adjustment block is installed with a locking assembly and is fixed to the side wall of the gantry through the locking assembly, an electric push rod is fixedly inserted into the side wall of the adjustment block, and a push block is installed at the telescopic end of the electric push rod, an insulating block is fixedly installed at the lower end of the push block, an insulating strip is provided below the push block, and a strip groove matching the insulating block is provided on the end surface of the insulating strip, a resistance rod is fixedly installed inside the strip groove, a conductive ring is fixedly inserted into the side wall of the insulating block, and the conductive ring is in sliding contact with the resistance rod, a spring is fixedly provided between the insulating block and the strip groove, the electric push rod, the conductive ring and the resistance rod are all electrically connected to the controller, and a detachable rubber block is installed at the bottom of the insulating strip.

[0018] Preferably, the recording mechanism includes an air cylinder fixedly mounted on the side wall of the sealing cover, and an air pressure detector is fixedly plugged into the cylinder end of the air cylinder, the detection end of the air pressure detector is arranged inside the air cylinder, a first normally closed solenoid valve is installed inside the air cylinder, a first normally open solenoid valve is installed inside the connecting pipe, the conductive ring and the resistance rod are electrically connected to the first normally open solenoid valve through a controller, and the first normally closed solenoid valve is electrically connected to the controller.

[0019] Preferably, the wear warning unit includes a first branch pipe fixedly plugged into the wall of the gas pipeline, and a gas flow meter is installed at the end of the first branch pipe, a second normally closed solenoid valve is installed inside the first branch pipe, a second branch pipe is fixedly plugged into the gas pipeline, and the second branch pipe is connected to the interior of the first branch pipe, a third normally closed solenoid valve is installed inside the second branch pipe, a first branch pipe and a second branch pipe are fixedly plugged into the wall of the gas pipeline, a second normally open solenoid valve is installed inside the first branch pipe, and a third normally open solenoid valve is installed inside the second branch pipe, the controller controls the opening and closing degree of the second normally closed solenoid valve and the second normally open solenoid valve according to the electrical signal output by the air pressure detector, the controller controls the opening and closing degree of the third normally closed solenoid valve and the third normally open solenoid valve according to the electrical signal output by the pressure detector, an electric-controlled valve is installed at a position above the first branch pipe and the first branch pipe inside the gas pipeline, and the electric-controlled valve and the gas flow meter are both electrically connected to the controller.

[0020] Preferably, the heating detection unit includes a fixed groove opened on the end surface of one of the flaps, and a plurality of square grooves are opened on the end surface of the other flap, a heater is fixedly installed inside the fixed groove, and a heat conductive plate is fixedly installed at the notch of the fixed groove, a temperature detection probe is fixedly installed inside each of the square grooves, and a heat conductive block is fixedly installed at the notch of each square groove, the temperature measuring end of each of the temperature detection probes is in contact with the heat conductive block on the same side, and the heater and the temperature detection probe are electrically connected to the controller.

[0021] Preferably, a plurality of magnetic isolation slot plates are fixedly plugged into the end surface of one of the flaps, and an electromagnetic strip is fixedly installed inside each magnetic isolation slot plate, and a magnetic conductive plate is fixedly installed at the notch of each magnetic isolation slot plate.

[0022] Compared with existing technologies, the advantages of bending machines for steel structures are:

[0023] 1. Through the cooperation of the machine, gantry, controller, flap, bending clearance groove, flip push unit and downward pressure bending unit, the steel plate can be bent quickly. In the bending process, by lifting on both sides, the formation of strip depressions on the outside of the bending part of the steel plate can be avoided as much as possible, so as to avoid affecting the structural stability of the subsequent steel structure and help improve the accuracy of the bending angle of the steel plate.

[0024] 2. Through the cooperation of the set air cavity, jet hole and heating air supply unit, the bending position can be preheated before bending. Preheating can reduce the occurrence of bending cracks and blow away impurities attached to the surface of the bending to avoid affecting the bending force.

[0025] 3. Through the auxiliary cleaning unit, the solid impurities attached to the surface of the steel plate bending can be further cleaned, and the roughness of the steel plate surface can be detected. In conjunction with the downward bending unit, as well as the recording mechanism and wear warning unit, the wear of the bending knife can be measured based on the pressure applied by the downward bending and the surface roughness of the steel plate bending. The personnel can be reminded in time to replace or trim the excessively worn bending knife to avoid bending to the point where the bending effect of the steel plate is affected by excessive wear.

[0026] 4. Through the set heating detection unit, the bending part of the steel plate can be quickly detected for cracks after bending, and personnel can be reminded in time when cracks appear in the bending. The position of the crack can be roughly located, which is convenient for personnel to check and determine. Heating after bending can further assist in reducing the bending stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the long strip-shaped depression after the steel plate is bent;

[0028] Figure 2 yes Figure 1 The structure of the middle C part is enlarged;

[0029] Figure 3 It is a three-dimensional structural schematic diagram of a steel structure processing bending machine provided by the present invention;

[0030] Figure 4 It is a schematic cross-sectional structure diagram of a machine platform of a steel structure processing bending machine provided by the present invention;

[0031] Figure 5 It is a structural schematic diagram of a downward pressing bending unit of a steel structure processing bending machine provided by the present invention;

[0032] Figure 6 It is a side view structural schematic diagram of the auxiliary cleaning unit of the steel structure processing bending machine provided by the present invention;

[0033] Figure 7 The invention provides a bending machine for steel structure processing. Figure 3 A magnified view of the structure of part B;

[0034] Figure 8 The invention provides a bending machine for steel structure processing. Figure 4 A magnified view of the structure of part A;

[0035] Fig. 9 The figure is a side view structural schematic diagram of the air cavity of the steel structure processing bending machine provided by the present invention.

[0036] In the figure: 1 machine, 2 gantry, 3 controller, 4 flap, 5 bending clearance groove, 6 flip push unit, 61 mounting hole, 62 mounting plate, 63 push-up electric cylinder, 64 support ball, 65 sliding seat, 7 press-down bending unit, 71 push-down electric cylinder, 72 fixing plate, 73 mounting seat, 74 pressure detector, 75 bending knife, 8 air cavity, 9 jet hole, 10 heating air supply unit, 101 sealing cover, 102 electric heater, 103 air pump, 104 air supply pipe, 105 connecting pipe, 11 auxiliary cleaning unit, 111 adjustment hole, 112 adjustment block, 113 locking assembly, 114 electric push rod, 115 push block, 116 insulating block, 117 insulating strip, 118 strip groove, 119 resistance rod, 12 recording mechanism, 121 air cylinder, 122 air pressure detector, 123 first normally closed solenoid valve, 124 first normally open solenoid valve, 13 wear warning unit, 131 first shunt pipe, 132 gas flow meter, 133 second normally closed solenoid valve, 134 second shunt pipe, 135 third normally closed solenoid valve, 136 first branch pipe, 137 second branch pipe, 138 second normally open solenoid valve, 139 third normally open solenoid valve, 14 heating detection unit, 141 fixed groove, 142 square groove, 143 heater, 144 heat conductive plate, 145 temperature detection probe, 146 heat conductive block, 15 conductive ring, 16 spring, 17 electric control valve, 18 rubber block, 19 magnetic isolation slot plate, 20 electromagnetic strip, 21 magnetic conductive plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0038] like Figure 3-Figure 9 As shown, a bending machine for processing steel structures comprises a machine platform 1 and a gantry 2 installed on the end face of the machine platform 1, a controller 3 is installed on the side wall of the gantry 2, and also comprises: two flaps 4, both of which are hinged on the end face of the machine platform 1, a bending clearance groove 5 is provided on the end face of the machine platform 1 between the two flaps 4, a flipping and pushing unit 6 is installed on the end face of the machine platform 1, and is used to push the two flaps 4 to flip toward each other, the flipping and pushing unit 6 comprises two mounting holes 61 opened on the end face of the machine platform 1, and the two mounting holes 61 are both arranged below the corresponding flaps 4, mounting plates 62 are fixedly installed inside the two mounting holes 61, and the end faces of the two mounting plates 62 are fixedly plugged with push-up electric cylinders 63, the telescopic ends of the two push-up electric cylinders 63 are fixedly installed with support balls 64, the lower ends of the two flaps 4 are slidably connected with sliding seats 65, and the lower ends of the sliding seats 65 are rotatably connected with the support balls 64, and the two push-up electric cylinders 63 are electrically connected to the controller 3.

[0039] The downward pressing bending unit 7 is installed at the center of the gantry 2 and is arranged just above the bending clearance groove 5. The downward pressing bending unit 7 includes a plurality of downward pushing electric cylinders 71 fixedly plugged into the end surface of the gantry 2, and the telescopic ends of each downward pushing electric cylinder 71 are jointly installed with a fixing plate 72, a mounting seat 73 is provided below the fixing plate 72, and a pressure detector 74 is provided between the fixing plate 72 and the mounting seat 73, and a bending knife 75 is detachably installed on the mounting seat 73. The downward pushing electric cylinder 71 and the pressure detector 74 are both electrically connected to the controller 3, and the pressure detector 74 can convert the detected pressure into an electrical signal and output it to the controller 3. This is an existing mature technology, so it will not be elaborated here.

[0040] The air cavity 8 is opened inside the gantry 2, and the cavity wall of the air cavity 8 is provided with multiple jet holes 9, and each jet hole 9 is arranged on one side of the bending and giving way groove 5. The machine 1 is equipped with a heating air supply unit 10, and the heating air supply unit 10 is used to transport hot air to the air cavity 8. The heating air supply unit 10 includes a sealing cover 101 fixedly installed at the bottom of the machine 1, and an electric heater 102 is installed inside the sealing cover 101, an air pump 103 is fixedly installed at the bottom of the sealing cover 101, and an air delivery pipe 104 is installed at the air delivery end of the air pump 103, and the air delivery pipe 104 is connected to the sealing cover 101, and a connecting pipe 105 is fixedly inserted on the side wall of the sealing cover 101, and the connecting pipe 105 is connected to the inside of the air cavity 8, and the electric heater 102 and the air pump 103 are both electrically connected to the controller 3.

[0041] The auxiliary cleaning unit 11 is installed on the side wall of the gantry 2 away from the air cavity 8. The auxiliary cleaning unit 11 includes an adjustment hole 111 opened on the side wall of the gantry 2. An adjustment block 112 is slidably provided inside the adjustment hole 111. The adjustment block 112 is installed with a locking assembly 113 and is fixed to the side wall of the gantry 2 through the locking assembly 113. An electric push rod 114 is fixedly inserted into the side wall of the adjustment block 112, and a push block 115 is installed at the telescopic end of the electric push rod 114. An insulating block 116 is fixedly installed at the lower end of the push block 115. An insulating strip 117 is provided below the push block 115, and a strip groove 118 matching the insulating block 116 is provided on the end surface of the insulating strip 117. The inner surface of the strip groove 118 is provided with a strip groove 118 matching the insulating block 116. A resistance rod 119 is fixedly installed on the top, a conductive ring 15 is fixedly inserted on the side wall of the insulating block 116, and the conductive ring 15 is in sliding contact with the resistance rod 119, a spring 16 is fixedly provided between the insulating block 116 and the strip groove 118, the electric push rod 114, the conductive ring 15 and the resistance rod 119 are all electrically connected to the controller 3, a detachable rubber block 18 is installed at the bottom of the insulating strip 117, and the height of the rubber block 18 can be adjusted by the adjusting block 112, so that it can be adjusted and used according to steel plates of different thicknesses, and after the position of the adjusting block 112 is adjusted, the position of the adjusting block 112 can be fixed by the locking assembly 113, and the locking assembly 113 includes components such as a screw, a nut, and a gasket.

[0042] A recording mechanism 12 is installed inside the heating air supply unit 10, and the controller 3 controls the recording mechanism 12 to work according to the electrical signal output by the auxiliary cleaning unit 11. The recording mechanism 12 includes an air cylinder 121 fixedly installed on the side wall of the sealing cover 101, and an air pressure detector 122 is fixedly plugged into the cylinder end of the air cylinder 121. The detection end of the air pressure detector 122 is arranged inside the air cylinder 121, and a first normally closed solenoid valve 123 is installed inside the air cylinder 121, and a first normally open solenoid valve 124 is installed inside the connecting pipe 105. The conductive ring 15 and the resistance rod 119 are electrically connected to the first normally open solenoid valve 124 through the controller 3, and the first normally closed solenoid valve 123 is electrically connected to the controller 3. The air pressure detector 122 converts the air pressure into an electrical signal and outputs it to the controller 3.

[0043] The wear warning unit 13 is arranged below the machine 1 and is connected to the gas outlet end of the heating and air supply unit 10. The controller 3 controls the operation of the wear warning unit 13 according to the electrical signal output by the recording mechanism 12 and the downward pressure bending unit 7. The wear warning unit 13 includes a first branch pipe 131 fixedly plugged into the wall of the gas pipeline 104, and a gas flow meter 132 is installed at the end of the first branch pipe 131, a second normally closed solenoid valve 133 is installed inside the first branch pipe 131, a second branch pipe 134 is fixedly plugged into the gas pipeline 104, and the second branch pipe 134 is connected to the inside of the first branch pipe 131, a third normally closed solenoid valve 135 is installed inside the second branch pipe 134, a first outlet pipe 136 and a second outlet pipe 137 are fixedly plugged into the wall of the gas pipeline 104, and the first outlet pipe 136 A second normally open solenoid valve 138 is installed inside, a third normally open solenoid valve 139 is installed inside the second branch pipe 137, the controller 3 controls the opening and closing degree of the second normally closed solenoid valve 133 and the second normally open solenoid valve 138 according to the electrical signal output by the air pressure detector 122, the controller 3 controls the opening and closing degree of the third normally closed solenoid valve 135 and the third normally open solenoid valve 139 according to the electrical signal output by the pressure detector 74, an electric control valve 17 is installed inside the gas supply pipe 104 at a position above the first branch pipe 136 and the first branch pipe 131, and the electric control valve 17 and the gas flow meter 132 are both electrically connected to the controller 3, the gas flow meter 132 detects the gas flow passing through, and outputs an electrical signal to the controller 3 after the gas flow reaches the set value, which is an existing mature technology and will not be elaborated here.

[0044] The heating detection unit 14 is installed on the end surfaces of the two flaps 4. The heating detection unit 14 includes a fixed groove 141 opened on the end surface of one of the flaps 4, and a plurality of square grooves 142 are opened on the end surface of the other flap 4. A heater 143 is fixedly installed inside the fixed groove 141, and a heat conductive plate 144 is fixedly installed at the notch of the fixed groove 141. A temperature detection probe 145 is fixedly installed inside each square groove 142, and a heat conductive block 146 is fixedly installed at the notch of each square groove 142. The temperature measuring end of each temperature detection probe 145 is in contact with the heat conductive block 146 on the same side. The heater 143 and the temperature detection probe 145 are electrically connected to the controller 3. After the temperature detection probe 145 detects that the temperature has not reached the threshold value, it will output an electrical signal to the controller 3. This is an existing mature technology, so it will not be elaborated here.

[0045] A plurality of magnetic isolation slot plates 19 are fixedly inserted into the end face of one of the flaps 4, and an electromagnetic strip 20 is fixedly installed inside each magnetic isolation slot plate 19. A magnetic conductive plate 21 is fixedly installed at the slot of each magnetic isolation slot plate 19. When the electromagnetic strip 20 is energized, the bent steel plate can be adsorbed so that the steel plate rotates synchronously with the flap 4 to prevent the steel plate from sliding.

[0046] The operating principle of the present invention is now described as follows: the steel plate to be bent is placed on the two flaps 4, and the bending position is determined so that the bending position is directly below the bending knife 75 (a positioning structure can be installed on the flap 4, for example, a positioning rod with an adjustable position is provided on the flap 4 to quickly position the steel plate). Then, according to the thickness of the steel plate to be bent, the position of the adjusting block 112 is adjusted along the vertical direction of the adjusting hole 111 so that the bottom of the rubber block 18 is flush with the top of the steel plate to be bent, and then the adjusting block 112 is locked and fixed in the adjusting hole 111 by the locking assembly 113 (refer to Figure 6 and Figure 7 The locking assembly 113 includes components such as a screw, a nut, and a spacer. A slider is installed on the side wall of the adjustment block 112, and slides in the slide groove of the adjustment hole 111 through the slider. A screw is installed on the side wall of the slider, and a locking hole matching the screw is opened on the wall of the slide groove. When the height of the adjustment block 112 is adjusted, the slider moves synchronously with the adjustment block 112, and the screw moves synchronously with the slider. When the position adjustment of the adjustment block 112 is completed, the slider is locked and fixed by the nut and the spacer in cooperation with the screw, so that the position of the adjustment block 112 can be fixed). Then, the controller 3 is started;

[0047] After the controller 3 is started, it will immediately control the electric push rod 114 to work at a fixed time, and control the connection circuit of the conductive ring 15, the resistance rod 119 and the first normally open electromagnetic valve 124 to be turned on with a delay of 2 seconds, and at the same time start the air pump 103, and control the electric control valve 17 inside the air pipe 104 to be energized and opened. When the electric push rod 114 is working, the electric push rod 114 will drive the rubber block 18 to move through the push block 115, the insulating block 116, the spring 16 and the insulating strip 117. The rubber block 18 will contact the upper surface of the steel plate to be bent, so as to clean the solid particles that may exist on the surface of the steel plate. At the same time, if the surface roughness of the steel plate is large, the greater the friction of the steel plate on the rubber block 18, the rubber block 18 will drive the insulating strip 117 and the insulating block 116 to have relative displacement, so that the conductive ring 15 and the resistance rod 119 are relatively displaced, and then the length of the connection circuit between the resistance rod 119 and the conductive ring 15 and the first normally open electromagnetic valve 124 is shortened (refer to Figure 6, the left end of the resistor rod 119 is connected to the connection circuit between the conductive ring 15 and the first normally open solenoid valve 124. When the conductive ring 15 and the resistor rod 119 are relatively displaced, the conductive ring 15 moves to the left relative to the resistor rod 119. At this time, the length of the resistor rod 119 on the left side of the conductive ring 15 becomes shorter, so the length of the resistor rod 119 connected to the connection circuit between the conductive ring 15 and the first normally open solenoid valve 124 becomes shorter, thereby making the connection circuit resistance of the resistor rod 119, the conductive ring 15 and the first normally open solenoid valve 124 smaller), so that the current intensity passed into the first normally open solenoid valve 124 becomes larger. At this time, the magnetic attraction force generated by the electromagnetic component inside the first normally open solenoid valve 124 becomes larger. Therefore, the greater the distance that the valve core of the first normally open solenoid valve 124 is adsorbed and moved, the smaller the exhaust area of ​​the first normally open solenoid valve 124 becomes. At this time, the airflow delivered to the inside of the sealing cover 101 by the air pump 103 through the air pipe 104 cannot be timely due to the increased degree of closure of the first normally open solenoid valve 124. When the air pump 103 is operated, the first normally closed solenoid valve 123 in the air cylinder 121 is started to open synchronously (the controller 3 controls the current passed into the first normally closed solenoid valve 123 to be large enough so that the valve hole of the first normally closed solenoid valve 123 is fully opened). The increase of the air pressure in the sealing cover 101 will cause the air pressure in the air cylinder 121 to increase synchronously, and the air pressure detector 122 can detect the air pressure in the air cylinder 121. When the electric push rod 114 finishes the timing work, the controller 3 controls the first normally closed solenoid valve 123 to be powered off and closed immediately. At this time, the air pressure value detected by the air pressure detector 122 represents the overall roughness of the surface of the steel plate at the bending part. At the same time, the controller 3 controls the conductive ring 15, the resistance rod 119 and the first normally open solenoid valve 124 to disconnect the connection circuit, and the first normally open solenoid valve 124 is reopened. Then the electric push rod 114 is controlled to drive the push block 115 to move back and reset.

[0048] After the push block 115 is moved back and reset, the controller 3 controls the electric heater 102 to start working, and the airflow delivered to the inside of the sealing cover 101 by the air pump 103 will be heated by the electric heater 102, and the heated hot air will enter the air cavity 8 through the sealing cover 101 and the connecting pipe 105, and be ejected through the jet hole 9. The ejected hot air can preheat the area around the bending part of the steel plate, and at the same time, under the action of the airflow, impurities that may exist on the surface of the steel plate can be further removed;

[0049] After the electric heater 102 has been working for 1 minute, the controller 3 controls the electric heater 102 to stop working, controls the air pump 103 to stop working, and controls the electric control valve 17 to cut off the power and close. Subsequently, the controller 3 controls the downward push electric cylinder 71 and the upward push electric cylinder 63 to work according to the preset program. The downward push electric cylinder 71 will drive the bending knife 75 to move down to the bending position of the steel plate, and under the downward pressure of the downward push electric cylinder 71, the bending knife 75 will apply downward pressure to the bending part of the steel plate, and the two upward push electric cylinders 63 will apply an upward thrust to the flap 4 on the same side through the support ball 64 and the sliding seat 65. At this time, the two flaps 4 are flipped at a certain angle about the hinge, so the flap 4 can lift the steel plate to the bending position. The parts on both sides of the position can prevent the parts on both sides of the bending position of the steel plate from sinking due to gravity, resulting in strip-shaped depressions on the outer side of the bend, thereby improving the bending quality of the steel plate. Moreover, since the bending position is preheated, the ductility of the steel plate can be improved to a certain extent, the internal atomic activity can be enhanced, and it can be deformed more evenly during bending, which helps to relieve stress concentration, thereby reducing the possibility of cracks to a certain extent (wherein, both the upper push electric cylinder 63 and the lower push electric cylinder 71 are provided with a travel switch. When the travel switch detects that the bending knife 75 and the flap 4 move to the preset position, the travel switch will output an electrical signal to the controller 3, and the controller 3 will synchronously control the upper push electric cylinder 63 and the lower push electric cylinder 71 to stop working);

[0050] After the controller 3 controls the push-down electric cylinder 71 to start working, the controller 3 will control the air pump 103 to work again, and control the opening and closing degree of the second normally closed solenoid valve 133 and the second normally open solenoid valve 138 according to the electrical signal output by the air pressure detector 122, and control the opening and closing degree of the third normally open solenoid valve 139 and the third normally closed solenoid valve 135 according to the electrical signal output by the pressure detector 74. When the roughness of the steel plate surface is too large, the air pressure inside the air cylinder 121 detected by the air pressure detector 122 will also be synchronously too large. At this time, the strength of the electrical signal output by the air pressure detector 122 to the controller 3 becomes larger synchronously, so the controller 3 controls the passage of the second normally open solenoid valve 138 and the second normally closed solenoid valve 136. The current intensity inside 133 will also increase synchronously, and after the pressure detected by the pressure detector 74 during the bending process increases (because the texture of the steel is not uniform, the bending pressure applied to the steel by the bending knife 75 is different when the steel is bent), the electrical signal intensity output by the pressure detector 74 to the controller 3 will also increase synchronously. At this time, the current intensity passed into the third normally open solenoid valve 139 and the third normally closed solenoid valve 135 will also increase synchronously. After the current intensity passed into the second normally open solenoid valve 138 and the third normally open solenoid valve 139 increases, the current passed into the electromagnetic parts inside the second normally open solenoid valve 138 and the third normally open solenoid valve 139 increases. At this time, the second normally open solenoid valve 139 is closed. The degree to which the valve cores of the second normally open solenoid valve 138 and the third normally open solenoid valve 139 are adsorbed and moved becomes larger, so the valve hole opening degree of the second normally open solenoid valve 138 and the third normally open solenoid valve 139 becomes smaller, so that the exhaust pores of the second normally open solenoid valve 138 and the third normally open solenoid valve 139 become smaller. Similarly, the valve hole opening degree of the second normally closed solenoid valve 133 and the third normally closed solenoid valve 135 becomes larger. Therefore, when the surface roughness of the steel plate is greater and the bending pressure to be applied is greater (the greater the surface roughness of the steel plate, the lower end of the bending knife 75 will be subjected to uneven reverse force due to the uneven contact position with the steel plate, so it will be subjected to uneven wear, and when the bending pressure is greater, the reverse force on the bending knife 75 is also greater. will become larger, so the degree of wear of the bending knife 75 will also increase), more airflow will flow through the first shunt pipe 131 and the second shunt pipe 134 through the gas flow meter 132, so that the metering speed of the gas flow meter 132 increases, and when the metering of the gas flow meter 132 reaches a threshold value (the threshold value is set according to the material of the bending knife 75 used and the steel plate material to be bent), the gas flow meter 132 will output an electrical signal to the controller 3, and the controller 3 will immediately send an alarm prompt information through its own alarm module (such as a buzzer). After receiving the alarm prompt information, the personnel should replace or repair the bending knife 75 in time to avoid excessive wear of the bending knife 75 affecting the bending accuracy;

[0051] When the output stroke of the upward electric cylinder 63 and the downward electric cylinder 71 is completed, the controller 3 controls the upward electric cylinder 63 and the downward electric cylinder 71 to stop working, and at the same time controls the air pump 103 to stop working. Then the controller 3 controls the heater 143 to work (the heating temperature is 120°C). The heating of the heater 143 can heat one side of the bending part of the steel plate, and the heated heat will be conducted to each square groove 142 on the other side through the bending part. After the heater 143 has been working for 2 minutes, the controller 3 controls each temperature detection probe 145 to work. Each temperature detection probe 145 can detect the temperature of the square groove 142. When there is a crack at the bending part, since the heat transfer performance of the air is lower than the heat transfer performance of the steel, when the heat is conducted to the crack, the heat conduction will be blocked. At this time, the heat conducted to the square groove 142 at the corresponding position becomes less, so the temperature of the square groove 142 will be lower than the normal conduction heat. The temperature of the square groove 142 is measured, and after each temperature detection probe 145 detects that the temperature of the square groove 142 does not reach the set value, the temperature detection probe 145 will output an electrical signal to the controller 3, and the controller 3 will remind the personnel through its own alarm module that there may be a bending crack at the bending position of the steel plate. At the same time, the controller 3 will display the number of the corresponding temperature detection probe 145 on the display screen. The personnel can know the approximate location of the bending crack based on the number information, which is convenient for the personnel to confirm the crack location. On the one hand, it can prevent the steel plate with cracks from flowing out (avoid affecting the structural strength of the subsequent steel structure), and on the other hand, it can remind the personnel to check and confirm the material of the remaining steel plates to be bent to avoid unnecessary bending work (wherein, the electric heater 102 preheats the steel plate before bending, which can make the steel plate, the square groove 142 and the surrounding area of ​​the fixed groove 141 at a stable temperature, avoiding the accuracy of crack temperature detection affected by room temperature differences);

[0052] When the controller 3 does not receive the electrical signal output by the temperature detection probe 145, the controller 3 will control the temperature detection probe 145 and the heater 143 to stop working 5 seconds after the temperature detection probe 145 is started. At the same time, the controller 3 controls the upper push electric cylinder 63, the lower push electric cylinder 71, etc. to stop working, and controls each electromagnetic strip 20 to work at the same time. Each electromagnetic strip 20 can adsorb the steel plate through the magnetic conductive plate 21, so that the steel plate can rotate and move synchronously with the flap 4 to avoid the steel plate from sliding off. When the upper push electric cylinder 63 moves back and resets, the controller 3 controls the electromagnetic strip 20 to cut off the power. At this time, the personnel can remove the bent steel plate. At the same time, the controller 3 controls the first normally closed electromagnetic valve 123 to open, so that the excess air inside the air cylinder 121 is released to avoid affecting the continued use.

[0053] Among them, the first normally closed solenoid valve 123, the first normally open solenoid valve 124, the second normally closed solenoid valve 133, the third normally closed solenoid valve 135, the second normally open solenoid valve 138, and the third normally open solenoid valve 139 all include a valve plate, an electromagnetic structure, a blocking valve core, an elastic element and other components. A conical valve hole is provided at the center of the valve plate, and the blocking valve core matches the conical valve hole. For the first normally closed solenoid valve 123, the second normally closed solenoid valve 133 and the third normally closed solenoid valve 135, when no power is supplied, the blocking valve core is in the shape of a cone and is stuck inside the conical valve hole, thereby sealing and blocking the conical valve hole, so that the valve plate remains in a fully closed state. When its own electromagnetic structure is energized, the blocking valve core overcomes the elastic supporting force of its own elastic element and is attracted The larger the current passed through the electromagnetic structure, the greater the distance the sealing valve core is adsorbed and moved, so the larger the distance between the sealing valve core and the conical valve hole, the larger the gap between the sealing valve core and the conical valve hole, and the greater the degree of opening. Similarly, for the first normally open solenoid valve 124, the second normally open solenoid valve 138 and the third normally open solenoid valve 139, when no power is supplied, the sealing valve core is on one side of the conical valve hole, and the conical valve hole remains in a fully open state. When the electromagnetic structure attracts the sealing valve core, the sealing valve core moves toward the conical valve hole, and the larger the current passed through the electromagnetic structure, the greater the magnetic attraction force it generates on the sealing valve core. Therefore, the closer the sealing valve core is to the conical valve hole, the smaller its degree of opening becomes.

[0054] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bending machine for processing steel structures, comprising a machine platform (1) and a gantry (2) mounted on the end surface of the machine platform (1), wherein a controller (3) is mounted on the side wall of the gantry (2), characterized in that: Also includes: The two flaps (4) are both hinged to the end surface of the machine platform (1); the end surface of the machine platform (1) is provided with a bending clearance groove (5) at a position between the two flaps (4); A flipping and pushing unit (6) is installed on the end surface of the machine platform (1) and is used to push the two flaps (4) to flip towards each other; A downward bending unit (7) is installed at the center of the gantry (2) and is arranged directly above the bending clearance groove (5); An air cavity (8) is provided inside the gantry (2); a cavity wall of the air cavity (8) is provided with a plurality of air injection holes (9), and each of the air injection holes (9) is provided on one side of the bending clearance groove (5); the machine (1) is provided with a heating air supply unit (10), and the heating air supply unit (10) is used to transport hot air to the air cavity (8); An auxiliary cleaning unit (11) is mounted on a side wall of the gantry (2) away from the air cavity (8), and a recording mechanism (12) is installed inside the heating and air supply unit (10), wherein the controller (3) controls the recording mechanism (12) to operate according to an electrical signal output by the auxiliary cleaning unit (11); A wear warning unit (13) is arranged below the machine platform (1) and is connected to the air outlet of the heating air supply unit (10); the controller (3) controls the operation of the wear warning unit (13) according to the electrical signals output by the recording mechanism (12) and the downward bending unit (7); A heating detection unit (14) mounted on the end surfaces of the two flaps (4); The heating air supply unit (10) comprises a sealing cover (101) fixedly mounted on the bottom of the machine (1), and an electric heater (102) is mounted inside the sealing cover (101); an air pump (103) is fixedly mounted on the bottom of the sealing cover (101), and an air delivery pipe (104) is mounted on the air delivery end of the air pump (103), the air delivery pipe (104) is connected to the sealing cover (101), a connecting pipe (105) is fixedly plugged into the side wall of the sealing cover (101), and the connecting pipe (105) is connected to the inside of the air cavity (8), and the electric heater (102) and the air pump (103) are both electrically connected to the controller (3); The auxiliary cleaning unit (11) comprises an adjustment hole (111) formed on a side wall of the gantry (2); an adjustment block (112) is slidably disposed inside the adjustment hole (111); the adjustment block (112) is provided with a locking assembly (113) and is fixed to the side wall of the gantry (2) via the locking assembly (113); an electric push rod (114) is fixedly plugged into the side wall of the adjustment block (112); a push block (115) is installed at the telescopic end of the electric push rod (114); an insulating block (116) is fixedly installed at the lower end of the push block (115); an insulating strip (117) is provided below the push block (115); and The end surface of the insulating strip (117) is provided with a strip groove (118) matching the insulating block (116); a resistance rod (119) is fixedly installed inside the strip groove (118); a conductive ring (15) is fixedly inserted into the side wall of the insulating block (116), and the conductive ring (15) is in sliding contact with the resistance rod (119); a spring (16) is fixedly provided between the insulating block (116) and the strip groove (118); the electric push rod (114), the conductive ring (15) and the resistance rod (119) are all electrically connected to the controller (3); and a detachable rubber block (18) is installed at the bottom of the insulating strip (117); The recording mechanism (12) comprises an air cylinder (121) fixedly mounted on the side wall of the sealing cover (101), and an air pressure detector (122) is fixedly plugged into the cylinder end of the air cylinder (121), the detection end of the air pressure detector (122) is arranged inside the air cylinder (121), a first normally closed electromagnetic valve (123) is installed inside the air cylinder (121), a first normally open electromagnetic valve (124) is installed inside the connecting pipe (105), the conductive ring (15) and the resistance rod (119) are electrically connected to the first normally open electromagnetic valve (124) via the controller (3), and the first normally closed electromagnetic valve (123) is electrically connected to the controller (3).

2. The steel structure bending machine according to claim 1, characterized in that: The flip push unit (6) comprises two mounting holes (61) provided on the end surface of the machine platform (1), and the two mounting holes (61) are both arranged below the corresponding flaps (4), the interiors of the two mounting holes (61) are fixedly mounted with mounting plates (62), and the end surfaces of the two mounting plates (62) are fixedly plugged with push-up electric cylinders (63), the telescopic ends of the two push-up electric cylinders (63) are fixedly mounted with support balls (64), the lower ends of the two flaps (4) are slidably connected with sliding seats (65), and the lower ends of the sliding seats (65) are rotatably connected with the support balls (64), and the two push-up electric cylinders (63) are electrically connected to the controller (3).

3. The steel structure bending machine according to claim 1, characterized in that: The downward-pressing bending unit (7) comprises a plurality of downward-pushing electric cylinders (71) fixedly plugged into the end surface of the gantry (2), and a fixing plate (72) is commonly mounted on the telescopic end of each downward-pushing electric cylinder (71), a mounting seat (73) is provided below the fixing plate (72), and a pressure detector (74) is provided between the fixing plate (72) and the mounting seat (73), a bending knife (75) is detachably mounted on the mounting seat (73), and the downward-pushing electric cylinder (71) and the pressure detector (74) are both electrically connected to the controller (3).

4. The steel structure bending machine according to claim 1, characterized in that: The wear warning unit (13) comprises a first branch pipe (131) fixedly plugged into the wall of the gas delivery pipe (104), a gas flow meter (132) being installed at the end of the first branch pipe (131), a second normally closed solenoid valve (133) being installed inside the first branch pipe (131), a second branch pipe (134) being fixedly plugged into the gas delivery pipe (104), the second branch pipe (134) being connected to the inside of the first branch pipe (131), a third normally closed solenoid valve (135) being installed inside the second branch pipe (134), a first outlet pipe (136) and a second outlet pipe (137) being fixedly plugged into the wall of the gas delivery pipe (104), the first outlet pipe (136) being installed inside A second normally open solenoid valve (138) is installed inside the second branch pipe (137), and a third normally open solenoid valve (139) is installed inside the second branch pipe (137). The controller (3) controls the opening and closing degree of the second normally closed solenoid valve (133) and the second normally open solenoid valve (138) according to the electrical signal output by the air pressure detector (122). The controller (3) controls the opening and closing degree of the third normally closed solenoid valve (135) and the third normally open solenoid valve (139) according to the electrical signal output by the pressure detector (74). An electric control valve (17) is installed inside the gas supply pipe (104) at a position above the first branch pipe (136) and the first branch pipe (131), and the electric control valve (17) and the gas flow meter (132) are both electrically connected to the controller (3).

5. The steel structure bending machine according to claim 1, characterized in that: The heating detection unit (14) comprises a fixing groove (141) provided on the end surface of one of the flaps (4), and a plurality of square grooves (142) are provided on the end surface of the other flap (4); a heater (143) is fixedly installed inside the fixing groove (141), and a heat conducting plate (144) is fixedly installed at the notch of the fixing groove (141); a temperature detection probe (145) is fixedly installed inside each of the square grooves (142), and a heat conducting block (146) is fixedly installed at the notch of each of the square grooves (142); a temperature measuring end of each of the temperature detection probes (145) is in contact with the heat conducting block (146) on the same side; and the heater (143) and the temperature detection probe (145) are electrically connected to the controller (3).

6. The steel structure bending machine according to claim 1, characterized in that: A plurality of magnetic isolation slot plates (19) are fixedly plugged into the end surface of one of the flaps (4), and an electromagnetic strip (20) is fixedly mounted inside each magnetic isolation slot plate (19), and a magnetic conductive plate (21) is fixedly mounted at the notch of each magnetic isolation slot plate (19).

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