CN111922146A - Bending forming control process for heavy I-steel - Google Patents
Bending forming control process for heavy I-steel Download PDFInfo
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- CN111922146A CN111922146A CN202010611435.5A CN202010611435A CN111922146A CN 111922146 A CN111922146 A CN 111922146A CN 202010611435 A CN202010611435 A CN 202010611435A CN 111922146 A CN111922146 A CN 111922146A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/162—Heating equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/14—Bending rods, profiles, or tubes combined with measuring of bends or lengths
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
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Abstract
The invention belongs to the technical field of cold-bending processing and forming processes of sectional materials, and particularly relates to a bending and forming control process of heavy I-steel, wherein a bending and forming machine used in the process comprises a rack; a pair of driving rollers is arranged on two sides of the top of the frame; a group of transverse limiting rollers is rotatably connected to the rack outside the two driving rollers through a bracket; the frame in the middle of the two driving rollers is fixedly connected with a pushing oil cylinder through a support, and the pushing oil cylinder is communicated with an oil pump through a hydraulic pipe and a controller; a piston rod of the pushing oil cylinder is rotatably connected with a pushing roller through a bearing frame, and the pushing oil cylinder drives the pushing roller to extrude the I-shaped steel so as to continuously bend and form the I-shaped steel; the I-steel is inserted between the limiting rollers in a horizontal laid state, a group of rubber bricks are arranged in an upward opening groove consisting of a top surface part, a bottom surface part and a rib part on the I-steel, and the rubber bricks are in interference fit with the groove; the I-shaped steel is supported by the rubber bricks, so that excessive deformation and damage of the I-shaped steel are reduced.
Description
Technical Field
The invention belongs to the technical field of cold-bending processing and forming processes of sectional materials, and particularly relates to a bending forming control process of heavy I-steel.
Background
In a plurality of steel structure plants, various structural members such as various bearing platforms, trussed beams and equipment platforms exist, and the structural members are required to be bent and formed by I-shaped steel. In the manufacturing process of the structural member, in order to ensure the processing quality of the i-steel and the installation precision of the accessories, the corresponding structural member is often searched and summarized by fine process analysis and repeated process tests so as to ensure the product quality. .
Some technical solutions related to the i-beam bending process also appear in the prior art, for example, a chinese patent with application number 201210389451X discloses a heavy-duty i-beam bending control process, which includes: step one, calculating the expansion length of the I-steel and blanking; debugging the parameters of the bending equipment and positioning; and step three, bending and forming the I-shaped steel by a bending forming machine. According to the heavy I-steel bending forming control process, firstly, theoretical stress principle analysis is carried out to determine a process key control point during I-steel bending forming, an effective bending forming control process is explored on the basis, bending process equipment matched with the process is manufactured, and through actual production inspection, the process method is reasonable in key control point, economical and practical, high in I-steel bending forming qualification rate, suitable for mass production, suitable for wide popularization and application and remarkable in economic benefit; when an I-steel is bent, the I-steel penetrates through two horizontal limiting rollers with horizontal axes arranged in the vertical direction, so that the deformation of the I-steel in the vertical direction is controlled, the flatness of the bent I-steel is guaranteed, when the I-steel is extruded by a pushing roller, the I-steel is easy to generate excessive deformation when reaching the yield limit, and rib parts near the pushing roller generate excessive deformation or even tilt to cause the rejection of the I-steel, so that the bending forming success rate of the I-steel is influenced.
Therefore, the invention provides a novel heavy I-steel bending forming control process, wherein rubber bricks in interference fit with the grooves are arranged in the grooves, so that the support of the rubber bricks on I-steel rib parts is increased, and the vertical bending and the arch tilting of the rib parts are reduced.
Disclosure of Invention
The invention provides a heavy I-steel bending forming control process, which aims to make up for the defects of the prior art and solve the problems that when I-steel is extruded by a pushing roller, the I-steel is easy to generate excessive deformation when the I-steel reaches the yield limit, and rib parts at the positions near the pushing roller generate excessive deformation and even tilt to cause I-steel scrap and influence the I-steel bending forming success rate.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a heavy I-steel bending forming control process, which comprises the following steps:
s1, placing the heavy I-steel into an oven to be heated, wherein the heating speed is 2 ℃/min, the temperature of the heavy I-steel reaches 120-;
s2, inserting one end of the heavy I-steel after being heated in the step S1 into a bending forming machine, inserting the heavy I-steel into the bending forming machine for a certain distance in an initial state, cleaning oxide skin on the surface of the heavy I-steel through a steel wire brush, and further cleaning oxide skin residues through high-speed air flow sprayed by a high-pressure air gun to ensure that the surface of the heavy I-steel is smooth and free of impurities;
s3, driving a pushing roller to push and bend the heavy I-steel through a pushing oil cylinder of the bending forming machine, driving the heavy I-steel to continuously feed through a driving roller, slowly bending the heavy I-steel into an arc shape, and measuring the radian of the heavy I-steel through a latch each time the pushing oil cylinder is fed until the heavy I-steel reaches a preset shape; then the driving roller stops feeding; after the heavy I-steel is cooled to room temperature, a certain shaping and stretching are carried out to ensure that the heavy I-steel is fully yielded, and finally the formed heavy I-steel is taken down from a bending forming machine, so that the bending forming operation of the heavy I-steel can be completed;
wherein the bending machine used in S2 includes a frame; a pair of driving rollers is arranged on two sides of the top of the rack, the driving rollers are driven to rotate by a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a group of transverse limiting rollers is rotatably connected to the rack outside the two driving rollers through a support, and the limiting rollers are used for limiting the vertical deformation of the I-steel inserted between the limiting rollers; the frame in the middle of the two driving rollers is fixedly connected with a pushing oil cylinder through a support, and the pushing oil cylinder is communicated with an oil pump through a hydraulic pipe and a controller; a piston rod of the pushing oil cylinder is rotatably connected with a pushing roller through a bearing frame, and the pushing oil cylinder drives the pushing roller to extrude the I-shaped steel so that the I-shaped steel is continuously bent and formed; the I-steel is inserted between the limiting rollers in a horizontal laid state, a group of rubber bricks are arranged in an upward opening groove formed by the top surface part, the bottom surface part and the rib part on the I-steel, and the rubber bricks are in interference fit with the groove; the I-shaped steel is supported by the rubber bricks, so that excessive deformation and damage of the I-shaped steel are reduced; when I-shaped steel is bent in the prior art, the I-shaped steel penetrates through two limiting rollers with horizontal axes arranged in the vertical direction, so that the vertical direction deformation of the I-shaped steel is controlled, the flatness of the bent I-shaped steel is guaranteed, when the I-shaped steel is extruded by a pushing roller, the I-shaped steel is easy to excessively deform when reaching the yield limit, rib parts at the positions near the pushing roller excessively deform and even tilt, the I-shaped steel is scrapped, the bending forming success rate of the I-shaped steel is influenced, rubber bricks in interference fit with grooves are installed in the grooves at the moment, the supports of the rubber bricks on the rib parts of the I-shaped steel are increased, the deformation direction of the rib parts are controlled, the vertical direction deformation of the rib parts is reduced, the vertical direction bending and the arched tilting of the rib parts are reduced, and the bending quality and the.
As an implementation mode of the invention, the number of the rubber bricks is two, and the rubber bricks are tightly attached to the top surface part and the bottom surface part of the I-shaped steel; a slope surface is arranged on one adjacent surface of the two rubber bricks, and a pressing block with an isosceles trapezoid cross section is arranged between the two rubber bricks; the rubber bricks are extruded through the pressing blocks, so that the supporting performance of the rubber bricks on the I-shaped steel is further improved, and the excessive deformation and damage of the I-shaped steel are reduced; through the rubber brick cooperation briquetting of separation setting, increase the installation effectiveness of rubber brick, the cooperation of cooperation domatic and briquetting simultaneously, produce the component force of horizontal direction when making the briquetting extrude downwards, further increase the support of rubber brick to I-steel apical surface portion and bottom surface portion, reduce the extrusion to the rubber brick among the I-shaped board bending process, and then make the rubber brick have in the whole process of I-steel bending deformation and last effectual support to the rib, reduce the rib portion deformation hunch-up that causes because of top pushing force of top pushing roller is too big, further increase the bending quality and the shaping success rate of I-steel.
As an embodiment of the present invention, the pressing block is made of a hollow elastic material, and the pressing block is filled with quartz sand; a group of wave grooves are formed in the slope surface, the wave grooves are matched with the pressing block, the deformation capacity of the pressing block is guaranteed, and the support for the I-steel is further increased; fill the briquetting that has the quartz sand through inside, in briquetting extrusion rubber brick process, the briquetting is close to the part deformation of wave groove and fills the clearance of wave groove, make briquetting and wave groove fully combine, further reduce the briquetting and be extruded at I-steel extrusion bending deformation in-process, guarantee the good support nature of briquetting to rubber brick and I-steel, the quartz sand that packs in the briquetting is when providing good support nature simultaneously, still has certain deformability, make the smooth bending deformation of I-steel, and then increase the bending forming efficiency of I-steel, can accomplish the dismantlement efficiency after the I-steel bending forming through filling the quartz sand simultaneously.
As an implementation mode of the invention, a group of gaskets are uniformly distributed on the upper side and the lower side of the rubber brick, a tie rod is fixedly connected between the gaskets at the corresponding positions on the upper side and the lower side, and the support performance of the rubber brick on the I-shaped steel is further improved by matching the gaskets with the tie rod; through to pull rod cooperation gasket, the vertical deformability of restriction rubber brick, and then when making the I-steel receive the extrusion bending of pushing away the roller, can only produce the deformation of horizontal direction after the rubber brick pressurized, the overall dimension increase after the rubber brick horizontal direction warp, and then further increase the holding power of rubber brick to the I-steel, guarantee that the rib portion is evenly deformed, increase the bending forming efficiency of I-steel.
As an implementation mode of the invention, a pair of sliding grooves are formed in the machine frame on two sides of the pushing roller, a sliding block is connected in each sliding groove in a sliding manner, the top of each sliding block is rotatably connected with a compaction roller through a support, and the compaction roller is used for compacting the pressing block, so that the compactness of quartz sand in the pressing block is increased, the support performance of the pressing block on the I-shaped steel is further increased, and the excessive deformation of the I-shaped steel is reduced; the pressing block is pressed through the pressing roller, so that quartz sand in the pressing block is pressed, gaps among quartz sand particles are reduced, transverse shear strength among the quartz sand is increased, flowing of the quartz sand in the pressing block at the corresponding position of the pushing roller is further reduced, supporting force of the quartz sand on the I-shaped steel is increased, and bending forming efficiency of the I-shaped steel is further increased.
As an embodiment of the invention, the periphery of the compaction roller is provided with a buffer ring, the buffer ring is hollow, and hydraulic oil is filled in the buffer ring; the volume of the hydraulic oil filled in the buffer ring is ninety percent of the volume of the buffer ring, the extrusion area of the pressing block is increased through extrusion deformation of the buffer ring, and the supporting performance of the pressing block on the I-shaped steel is further increased; through the hydraulic oil that fills in the buffering ring for the buffering ring produces certain deformation when the extrusion briquetting, and then increases the area of contact of buffering ring to the briquetting, further increases the compaction area of buffering ring to the quartz sand in the briquetting, makes to provide more support area after the inside more quartz sand compaction of briquetting, makes the I-steel evenly warp, avoids the local too big and excessive deformation of I-steel pressurized, further improves the bending quality of I-steel.
The invention has the following beneficial effects:
1. according to the heavy I-steel bending forming control process, the rubber bricks in interference fit with the grooves are arranged in the grooves, so that the support of the rubber bricks on the rib parts of the I-steel is increased, the deformation direction of the rib parts is controlled, the vertical deformation of the rib parts is reduced, the vertical bending and arch tilting of the rib parts are reduced, and the bending quality and the forming success rate of the I-steel are increased.
2. According to the heavy I-steel bending forming control process, the press block filled with the quartz sand is filled inside, the part of the press block, close to the wave groove, deforms and fills the gap of the wave groove, the press block is reduced from being extruded in the I-steel extruding bending deformation process, good supporting performance of the press block on rubber bricks and the I-steel is guaranteed, meanwhile, the quartz sand filled in the press block still has certain deformation capacity while providing good supporting performance, and therefore the I-steel can be bent and deformed smoothly.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a perspective view of the bending machine of the present invention;
FIG. 3 is a sectional view of a rubber brick and a briquette according to the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 2 at A;
FIG. 5 is an enlarged view of a portion of FIG. 3 at B;
in the figure: the device comprises a frame 1, a driving roller 11, a limiting roller 12, a support 13, a pushing oil cylinder 14, a bearing frame 15, a pushing roller 16, a top surface part 2, a bottom surface part 21, a rib part 22, a groove 24, a rubber brick 3, a slope surface 31, a pressing block 32, a wave groove 33, a gasket 34, a counter pull rod 35, a sliding groove 17, a sliding block 18, a compaction roller 19 and a buffer ring 20.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 5, the bending forming control process for heavy i-steel according to the present invention includes the following steps:
s1, placing the heavy I-steel into an oven to be heated, wherein the heating speed is 2 ℃/min, the temperature of the heavy I-steel reaches 120-;
s2, inserting one end of the heavy I-steel after being heated in the step S1 into a bending forming machine, inserting the heavy I-steel into the bending forming machine for a certain distance in an initial state, cleaning oxide skin on the surface of the heavy I-steel through a steel wire brush, and further cleaning oxide skin residues through high-speed air flow sprayed by a high-pressure air gun to ensure that the surface of the heavy I-steel is smooth and free of impurities;
s3, driving a pushing roller to push and bend the heavy I-steel through a pushing oil cylinder of the bending forming machine, driving the heavy I-steel to continuously feed through a driving roller, slowly bending the heavy I-steel into an arc shape, and measuring the radian of the heavy I-steel through a latch each time the pushing oil cylinder is fed until the heavy I-steel reaches a preset shape; then the driving roller stops feeding; after the heavy I-steel is cooled to room temperature, a certain shaping and stretching are carried out to ensure that the heavy I-steel is fully yielded, and finally the formed heavy I-steel is taken down from a bending forming machine, so that the bending forming operation of the heavy I-steel can be completed;
wherein the bending machine used in S2 includes a frame 1; a pair of driving rollers 11 is arranged on two sides of the top of the rack 1, the driving rollers 11 are driven to rotate by a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a group of transverse limiting rollers 12 are rotatably connected to the rack 1 at the outer sides of the two driving rollers 11 through a support, and the limiting rollers 12 are used for limiting the vertical deformation of I-steel inserted between the limiting rollers 12; a pushing oil cylinder 14 is fixedly connected to the frame 1 at the middle part of the two driving rollers 11 through a support 13, and the pushing oil cylinder 14 is communicated with an oil pump through a hydraulic pipe and a controller; a piston rod of the pushing oil cylinder 14 is rotatably connected with a pushing roller 16 through a bearing frame 15, and the pushing oil cylinder 14 drives the pushing roller 16 to extrude the I-steel, so that the I-steel is continuously bent and formed; the I-steel is inserted between the limiting rollers 12 in a horizontal laid-down shape, a group of rubber bricks 3 are arranged in a groove 24 which is formed by the top surface part 2, the bottom surface part 21 and the rib part 22 and is provided with an upward opening, and the rubber bricks 3 are in interference fit with the groove 24; the I-shaped steel is supported by the rubber bricks 3, so that excessive deformation and damage of the I-shaped steel are reduced; when I-shaped steel is bent in the prior art, the I-shaped steel penetrates through two limiting rollers 12 with horizontal axes arranged in the vertical direction, so that the deformation of the I-shaped steel in the vertical direction is controlled, the flatness of the bent I-shaped steel is guaranteed, when the I-shaped steel is extruded by a pushing roller 16, the I-shaped steel is easy to excessively deform when reaching the yield limit, a rib part 22 near the pushing roller 16 excessively deforms and even tilts, the I-shaped steel is scrapped, the bending forming success rate of the I-shaped steel is influenced, at the moment, a rubber brick 3 in interference fit with a groove 24 is installed in the groove 24, the support of the rubber brick 3 on the rib part 22 of the I-shaped steel is increased, the deformation direction of the rib part 22 is controlled, the deformation of the rib part 22 in the vertical direction is reduced, the bending and the arched tilting of the rib part 22 in the vertical direction.
As an embodiment of the invention, the number of the rubber bricks 3 is two, and the rubber bricks 3 are tightly attached to the top surface part 2 and the bottom surface part 21 of the i-shaped steel; a slope 31 is arranged on one adjacent surface of each of the two rubber bricks 3, and a pressing block 32 with an isosceles trapezoid cross section is arranged between the two rubber bricks 3; the rubber brick 3 is extruded through the pressing block 32, so that the supporting performance of the rubber brick 3 on the I-shaped steel is further improved, and the excessive deformation and damage of the I-shaped steel are reduced; rubber brick 3 cooperation briquetting 32 through the separation setting, increase the installation effectiveness of rubber brick 3, the cooperation of domatic 31 of cooperation and briquetting 32 simultaneously, produce the component force of horizontal direction when making briquetting 32 extrude downwards, further increase the support of rubber brick 3 to I-steel top face portion 2 and bottom face portion 21, reduce the extrusion to rubber brick 3 among the I-steel board bending process, and further make rubber brick 3 have lasting effectual support to rib 22 at I-steel bending deformation's whole in-process, reduce because of pushing the rib portion 22 that top pushing roller 16 pushes up the too big hunch-up that causes, further increase the bending quality and the shaping success rate of I-steel.
As an embodiment of the present invention, the pressing block 32 is made of a hollow elastic material, and the pressing block 32 is filled with quartz sand; a group of wave grooves 33 are formed in the slope surface 31, and the wave grooves 33 are matched with the pressing block 32, so that the deformation capacity of the pressing block 32 is ensured, and the support for the I-steel is further increased; the pressing block 32 filled with the quartz sand is filled inside, the rubber brick 3 is extruded by the pressing block 32, the part of the pressing block 32 close to the wave groove 33 deforms and fills the gap of the wave groove 33, so that the pressing block 32 is fully combined with the wave groove 33, the pressing block 32 is further reduced to be extruded in the I-shaped steel extrusion bending deformation process, the good supporting performance of the pressing block 32 on the rubber brick 3 and the I-shaped steel is guaranteed, meanwhile, the quartz sand filled in the pressing block 32 still has certain deformation capacity while providing good supporting performance, the I-shaped steel is smoothly bent and deformed, the bending forming efficiency of the I-shaped steel is further increased, and meanwhile, the dismounting efficiency of the rubber brick 3 after the I-shaped steel is bent and formed can be increased by filling the quartz sand.
As an implementation mode of the invention, a group of gaskets 34 is uniformly distributed on the upper side and the lower side of the rubber brick 3, the gaskets 34 at the corresponding positions on the upper side and the lower side are fixedly connected with a tie rod 35, and the support of the rubber brick 3 on the I-shaped steel is further increased by matching the gaskets 34 with the tie rod 35; through matching pull rod 35 with gasket 34, restriction rubber brick 3's vertical deformability, and then make the I-steel receive the extrusion of pushing roller 16 crooked, can only produce the deformation of horizontal direction after the rubber brick 3 pressurized, the overall dimension increase after the deformation of 3 horizontal directions of rubber brick, and then further increase rubber brick 3 to the holding power of I-steel, guarantee rib portion 22 evenly to warp, increase the bending forming efficiency of I-steel.
As an embodiment of the invention, a pair of sliding grooves 17 are formed in the frame 1 on both sides of the pushing roller 16, a sliding block 18 is connected in the sliding grooves 17 in a sliding manner, the top of the sliding block 18 is rotatably connected with a compacting roller 19 through a support, the compacting roller 19 is used for compacting the pressing block 32, the compactness of quartz sand in the pressing block 32 is increased, the supporting performance of the pressing block 32 on the i-steel is further increased, and the excessive deformation of the i-steel is reduced; the pressing block 32 is pressed through the pressing roller 19, so that quartz sand in the pressing block 32 is pressed, gaps among quartz sand particles are reduced, the transverse shear strength among the quartz sand is increased, the flow of the quartz sand in the pressing block 32 at the corresponding position of the pushing roller 16 is further reduced, the supporting force of the quartz sand on the I-shaped steel is increased, and the bending forming efficiency of the I-shaped steel is further increased.
As an embodiment of the invention, a buffer ring 20 is arranged on the periphery of the compaction roller 19, the buffer ring 20 is hollow, and the buffer ring 20 is filled with hydraulic oil; the volume of the hydraulic oil filled in the buffer ring 20 is ninety percent of the volume of the buffer ring 20, the buffer ring 20 is extruded and deformed, the extrusion area of the pressing block 32 is increased, and the supporting performance of the pressing block 32 on the I-shaped steel is further increased; through the hydraulic oil of intussuseption in the cushion ring 20, make cushion ring 20 when extrusion briquetting 32, cushion ring 20 bottom produces certain deformation, and then increase the area of contact of cushion ring 20 to briquetting 32, further increase the area of compaction of cushion ring 20 to the quartz sand in the briquetting 32, make and provide more support area after the inside more quartz sand compaction of briquetting 32, make the I-steel uniform deformation, avoid the local too big and excessive deformation of pressurized of I-steel, further improve the bending quality of I-steel.
When the I-shaped steel bending device is used, when I-shaped steel is bent in the prior art, the I-shaped steel penetrates through the two limiting rollers 12 with horizontal axes arranged in the vertical direction, so that the vertical direction deformation of the I-shaped steel is controlled, the flatness of the bent I-shaped steel is ensured, when the I-shaped steel is extruded by the pushing rollers 16, the I-shaped steel is easy to generate excessive deformation when reaching the yield limit, the rib part 22 at the position near the pushing rollers 16 generates excessive deformation and even tilts, the I-shaped steel is scrapped, and the bending forming success rate of the I-shaped steel is influenced, at the moment, the rubber bricks 3 in interference fit with the grooves 24 are arranged in the grooves 24, the supports of the rubber bricks 3 on the rib part 22 of the I-shaped steel are increased, the deformation direction of the rib part 22 is controlled, the vertical direction deformation of the rib part 22 is reduced, the vertical direction bending and; the rubber brick 3 which is arranged in a separated mode is matched with the pressing block 32, the installation efficiency of the rubber brick 3 is improved, meanwhile, the slope surface 31 and the pressing block 32 are matched, so that component force in the horizontal direction is generated when the pressing block 32 extrudes downwards, the supporting of the rubber brick 3 on the top surface part 2 and the bottom surface part 21 of the I-shaped steel is further increased, the extrusion of the rubber brick 3 in the bending forming process of the I-shaped plate is reduced, the rubber brick 3 has continuous and effective supporting on the rib part 22 in the whole process of the bending deformation of the I-shaped steel, the deformation and arching of the rib part 22 caused by the overlarge pushing force of the jacking roller 16 are reduced, and the bending quality and the forming success rate of the I; through the pressing block 32 filled with the quartz sand, in the process that the pressing block 32 extrudes the rubber brick 3, the part of the pressing block 32 close to the wave groove 33 deforms and fills the gap of the wave groove 33, so that the pressing block 32 is fully combined with the wave groove 33, the pressing block 32 is further reduced from being extruded in the process of extruding, bending and deforming the I-shaped steel, good supporting performance of the pressing block 32 on the rubber brick 3 and the I-shaped steel is ensured, meanwhile, the quartz sand filled in the pressing block 32 has certain deformation capacity while providing good supporting performance, so that the I-shaped steel is smoothly bent and deformed, the bending and forming efficiency of the I-shaped steel is further increased, and meanwhile, the dismounting efficiency of the rubber brick 3 after the I-shaped steel is bent and formed can be increased through filling the; the vertical deformability of the rubber brick 3 is limited by matching the pull rod 35 with the gasket 34, so that when the I-shaped steel is extruded and bent by the jacking roller 16, the rubber brick 3 can only deform in the horizontal direction after being pressed, and the shape and size of the rubber brick 3 are increased after the rubber brick 3 deforms in the horizontal direction, so that the supporting force of the rubber brick 3 on the I-shaped steel is further increased, the uniform deformation of the rib part 22 is ensured, and the bending forming efficiency of the I-shaped steel is increased; the pressing block 32 is pressed by the pressing roller 19, so that quartz sand in the pressing block 32 is pressed, gaps among quartz sand particles are reduced, the transverse shear strength among the quartz sand is increased, the flow of the quartz sand in the pressing block 32 at the position corresponding to the pushing roller 16 is further reduced, the supporting force of the quartz sand on the I-shaped steel is increased, and the bending forming efficiency of the I-shaped steel is further increased; through the hydraulic oil of intussuseption in the cushion ring 20, make cushion ring 20 when extrusion briquetting 32, cushion ring 20 bottom produces certain deformation, and then increase the area of contact of cushion ring 20 to briquetting 32, further increase the area of compaction of cushion ring 20 to the quartz sand in the briquetting 32, make and provide more support area after the inside more quartz sand compaction of briquetting 32, make the I-steel uniform deformation, avoid the local too big and excessive deformation of pressurized of I-steel, further improve the bending quality of I-steel.
The front, the back, the left, the right, the upper and the lower are all based on the figure 2 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A heavy I-steel bending forming control process is characterized in that: the method comprises the following steps:
s1, placing the heavy I-steel into an oven to be heated, wherein the heating speed is 2 ℃/min, the temperature of the heavy I-steel reaches 120-;
s2, inserting one end of the heavy I-steel after being heated in the step S1 into a bending forming machine, inserting the heavy I-steel into the bending forming machine for a certain distance in an initial state, cleaning oxide skin on the surface of the heavy I-steel through a steel wire brush, and further cleaning oxide skin residues through high-speed air flow sprayed by a high-pressure air gun to ensure that the surface of the heavy I-steel is smooth and free of impurities;
s3, driving a pushing roller to push and bend the heavy I-steel through a pushing oil cylinder of the bending forming machine, driving the heavy I-steel to continuously feed through a driving roller, slowly bending the heavy I-steel into an arc shape, and measuring the radian of the heavy I-steel through a latch each time the pushing oil cylinder is fed until the heavy I-steel reaches a preset shape; then the driving roller stops feeding; after the heavy I-steel is cooled to room temperature, a certain shaping and stretching are carried out to ensure that the heavy I-steel is fully yielded, and finally the formed heavy I-steel is taken down from a bending forming machine, so that the bending forming operation of the heavy I-steel can be completed;
wherein the bending machine used in S2 comprises a frame (1); a pair of driving rollers (11) is arranged on two sides of the top of the rack (1), the driving rollers (11) are driven to rotate through a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a group of transverse limiting rollers (12) are rotatably connected to the rack (1) on the outer sides of the two driving rollers (11) through a support, and the limiting rollers (12) are used for limiting the vertical deformation of I-steel inserted between the limiting rollers (12); a pushing oil cylinder (14) is fixedly connected to the frame (1) in the middle of the two driving rollers (11) through a support (13), and the pushing oil cylinder (14) is communicated with an oil pump through a hydraulic pipe and a controller; a piston rod of the pushing oil cylinder (14) is rotatably connected with a pushing roller (16) through a bearing frame (15), and the pushing oil cylinder (14) drives the pushing roller (16) to extrude the I-steel so that the I-steel is continuously bent and formed; the I-steel is inserted between the limiting rollers (12) in a horizontal laid-down shape, a group of rubber bricks (3) are arranged in an upward opening groove (24) formed by the top surface part (2), the bottom surface part (21) and the rib part (22) on the I-steel, and the rubber bricks (3) are in interference fit with the groove (24); the I-shaped steel is supported through the rubber bricks (3), and excessive deformation and damage of the I-shaped steel are reduced.
2. The bending forming control process of the heavy I-steel according to claim 1, characterized in that: the number of the rubber bricks (3) is two, and the rubber bricks (3) are tightly attached to the top surface part (2) and the bottom surface part (21) of the I-shaped steel; a slope surface (31) is arranged on one adjacent surface of the two rubber bricks (3), and a pressing block (32) with an isosceles trapezoid cross section is arranged between the two rubber bricks (3); the rubber brick (3) is extruded through the pressing block (32), so that the supporting performance of the rubber brick (3) on the I-shaped steel is further improved, and the excessive deformation and damage of the I-shaped steel are reduced.
3. The bending forming control process of the heavy I-steel according to claim 2, characterized in that: the pressing block (32) is made of a hollow elastic material, and quartz sand is filled in the pressing block (32); a set of wave groove (33) is seted up on domatic (31), through wave groove (33) cooperation briquetting (32), guarantees the deformability of briquetting (32), further increases the support to the I-steel.
4. The bending forming control process of the heavy I-steel according to claim 3, characterized in that: a set of gaskets (34) are evenly distributed on the upper side and the lower side of the rubber brick (3), a pair of pull rods (35) are fixedly connected between the gaskets (34) at the upper corresponding position and the lower corresponding position, and the supporting performance of the rubber brick (3) on the I-shaped steel is further improved by matching the gaskets (34) with the pair of pull rods (35).
5. The bending forming control process of the heavy I-steel according to claim 4, wherein the bending forming control process comprises the following steps: a pair of sliding grooves (17) are formed in the rack (1) on the two sides of the pushing roller (16), sliding blocks (18) are connected in the sliding grooves (17) in a sliding mode, the tops of the sliding blocks (18) are connected with compacting rollers (19) in a rotating mode through supports, the compacting rollers (19) are used for compacting pressing blocks (32), the compactness of quartz sand in the pressing blocks (32) is increased, the supporting performance of the pressing blocks (32) on the I-shaped steel is further increased, and the excessive deformation of the I-shaped steel is reduced.
6. The bending forming control process of the heavy I-steel according to claim 5, wherein: the periphery of the compaction roller (19) is provided with a buffer ring (20), the buffer ring (20) is hollow, and hydraulic oil is filled in the buffer ring (20); the volume of the hydraulic oil filled in the buffer ring (20) is ninety percent of the volume of the buffer ring (20), the buffer ring (20) is extruded and deformed, the extrusion area of the pressing block (32) is increased, and the supporting performance of the pressing block (32) on the I-shaped steel is further increased.
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| CN202010611435.5A CN111922146A (en) | 2020-06-29 | 2020-06-29 | Bending forming control process for heavy I-steel |
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| CN202010611435.5A CN111922146A (en) | 2020-06-29 | 2020-06-29 | Bending forming control process for heavy I-steel |
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