CN113523046A - Ring beam bending process - Google Patents
Ring beam bending process Download PDFInfo
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- CN113523046A CN113523046A CN202110615302.XA CN202110615302A CN113523046A CN 113523046 A CN113523046 A CN 113523046A CN 202110615302 A CN202110615302 A CN 202110615302A CN 113523046 A CN113523046 A CN 113523046A
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- 238000005452 bending Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 204
- 239000010959 steel Substances 0.000 claims abstract description 204
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000013461 design Methods 0.000 claims abstract description 14
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 20
- 230000005856 abnormality Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 5
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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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
-
- 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
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/165—Cooling 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
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/167—Greasing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a ring beam bending process, which comprises the following steps: confirming a mold for bending, the material of the square steel pipe, the plate thickness of the square steel pipe and the model of a pipe bender according to a design drawing of a ring beam, and completing preparation work before the square steel pipe is processed; hoisting the square steel pipe to the pipe bender through a crane, and positioning the square steel pipe through the die; and starting the intermediate frequency power supply on the pipe bender, carrying out bending processing on the square steel pipe to form a bent steel pipe, detecting and shaping the bent steel pipe, finishing the manufacturing of the ring beam, realizing the integral bending forming of the square steel pipe adopted by the ring beam, having attractive appearance quality, reducing welding work and further improving production efficiency.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a bending process for a ring beam.
Background
The technical requirements of the open sea wind power project on the steel plates are extremely high, the requirements on the steel plates are continuously increased along with the continuous development of offshore wind power generation, and the demand of the Q355E first-level normalizing steel plate reaches the situation that the demand can not be met.
The pipe bender is equipment for processing radian of metal pipes, and mainly comprises an oil cylinder, a host machine and a hydraulic pump station, wherein the host machine comprises a chassis, an oil cylinder support plate, a movable push plate, a pipe clamping platform and a clamping roller.
In the prior art, the ultra-large ring beam generally adopts a steel plate welding process, the construction period of manufacturing the ultra-large ring beam by adopting the steel plate welding process is long, and the appearance quality effect is poor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a ring beam bending process, which realizes the integral bending forming of the ring beam by adopting a square steel pipe, has attractive appearance quality, reduces welding work and further improves the production efficiency.
The ring beam bending process provided by the embodiment of the invention comprises the following steps:
confirming a mold for bending, the material of the square steel pipe, the plate thickness of the square steel pipe and the model of a pipe bender according to a design drawing of a ring beam, and completing preparation work before the square steel pipe is processed;
hoisting the square steel pipe to the pipe bender through a crane, and positioning the square steel pipe through the die; and
and starting the intermediate frequency power supply on the pipe bender, carrying out bending machining on the square steel pipe to form a bent steel pipe, and detecting and shaping the bent steel pipe to finish the manufacture of the ring beam.
The bending process for the ring beam provided by the embodiment of the invention at least has the following beneficial effects: confirm the mould of bending over a slow fire processing according to the design drawing of collar tie, the material of square steel pipe, the thick model of board and bending machine of square steel pipe, and accomplish the preparation work before the square steel pipe carries out processing, hang the square steel pipe on the bending machine, and fix a position the square steel pipe through the mould, start the intermediate frequency power, carry out the bending over a slow fire processing with the square steel pipe, finally form curved steel pipe, detect the design at the steel pipe that bends, thereby accomplish the manufacturing of collar tie, realize that the collar tie adopts the whole bending over a slow fire shaping of square steel pipe, the appearance quality is pleasing to the eye, reduce weldment work, and then improve production efficiency.
According to some embodiments of the present invention, the preparing the square steel pipe before machining comprises:
determining an intermediate frequency coil and a clamp according to the specification of the square steel pipe, and replacing the intermediate frequency coil and the clamp on the pipe bender;
manufacturing a profiling mold according to the bending radius and the bending angle of the bent steel pipe, wherein the profiling mold is made of wood or aluminum alloy materials; and
and (3) preparing a measuring instrument for detecting the bent steel pipe.
According to some embodiments of the invention, the contact surface of the master form with the workpiece needs to be subjected to a grinding and polishing treatment.
According to some embodiments of the invention, the measuring device comprises a steel plate thickness gauge, a measuring ruler, a plurality of magnetic seat tools and a plurality of cotton threads, and the plurality of magnetic seat tools and the cotton threads are used for measuring the torsion and the flatness of the bent steel pipe.
According to some embodiments of the invention, hoisting the square steel tube onto the tube bender by a crane and positioning the square steel tube by the die comprises:
when the square steel pipe is hoisted, the steel wire rope, the clamping ring and the hoisting angle are checked, and the hoisting weight is ensured to be within the safety coefficient range of the steel wire rope;
additionally arranging a cushion block at the bottom of the square steel pipe, wherein a lifting lug connected with the steel wire rope is arranged on the cushion block;
after the square steel pipe is hoisted to a station through the crane, the square steel pipe is fixed with the station through a tightening clamp; and
and according to the design drawing of the ring beam, calculating to obtain the bending position of the square steel pipe.
According to some embodiments of the present invention, the calculating the bending position of the square steel pipe includes: and obtaining the length of the bending section of the square steel pipe according to calculation, and positioning and marking on the square steel pipe.
According to some embodiments of the present invention, starting a medium frequency power supply on the pipe bender, performing a bending process on the square steel pipe to form a bent steel pipe, and performing a detection and shaping on the bent steel pipe to complete the manufacturing of the ring beam includes:
before the square steel pipe is subjected to bending processing, the pipe bender, the intermediate frequency power supply, the cooling water system and the oil pump system need to be checked;
after the intermediate frequency power supply is started, heating the square steel pipe to the lowest temperature for bending the bent steel pipe, adjusting the oil amount, and starting to push the pipe;
in the process of bending the square steel pipe, the pipe bender, the cooling water system and the oil pump system need to be checked for many times, and when abnormality is checked, the pipe bender, the cooling water system and the oil pump system are stopped; and
and when the square steel pipe is processed, the bent steel pipe is obtained, and the ring beam is obtained after the first wall thickness measurement, product shaping, radian inspection and second wall thickness measurement are carried out on the bent steel pipe.
According to some embodiments of the present invention, after the intermediate frequency power supply is started, heating the square steel tube to a minimum temperature at which the bent steel tube is subjected to simmer bending, and adjusting an oil amount to start pushing the steel tube includes: ensuring that the pushing speed of the pushing pipe is increased or decreased to be matched with the heating temperature and ensuring that the heating temperature does not exceed the phase change transition temperature of the square steel pipe.
According to some embodiments of the present invention, during the bending process of the square steel pipe, the checking the pipe bender, the cooling water system and the oil pump system for a plurality of times includes:
checking the running conditions of a water pump, an oil pump and an air compressor, and timely processing the abnormity;
monitoring the peripheral clearance between the induction coil and the bent steel pipe and the cooling condition of the spray holes, and adjusting and passing through the holes when abnormality occurs; checking the oil cylinder and ensuring that air does not leak into the oil cylinder; and
and obstacles which hinder the operation of the machine tool do not exist around the pipe bender, and oil is frequently added to the rail, the screw rod and the lubricating part.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
FIG. 1 is a flow chart of a ring beam bending process according to an embodiment of the present invention;
FIG. 2 is a detailed flowchart of step S100 in the bending process of the ring beam according to an embodiment of the present invention;
FIG. 3 is a detailed flowchart of step S200 in the bending process of the ring beam according to an embodiment of the present invention;
FIG. 4 is a detailed flowchart of step S240 in FIG. 3;
FIG. 5 is a flowchart illustrating the step S300 of the bending process for a ring beam according to an embodiment of the present invention;
FIG. 6 is a detailed flowchart of step S310 in FIG. 5;
FIG. 7 is a detailed flowchart of step S330 in FIG. 5;
fig. 8 is another detailed flowchart of step S330 in fig. 5.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
A ring beam bending process of an embodiment of the present invention is described with reference to fig. 1 to 7.
Referring to fig. 1, the ring beam bending process according to the embodiment of the present invention includes, but is not limited to, step S100, step S200, and step S300.
Step S100, confirming a mold for bending, the material of the square steel pipe, the plate thickness of the square steel pipe and the model of a pipe bender according to a design drawing of a ring beam, and completing preparation work of the square steel pipe before processing;
s200, hoisting the square steel pipe to a pipe bender through a crane, and positioning the square steel pipe through a die;
and S300, starting a medium-frequency power supply on the pipe bender, carrying out simmering and bending on the square steel pipe to form a bent steel pipe, and detecting and shaping the bent steel pipe to finish the manufacturing of the ring beam.
Confirming a mold for bending processing, a material of a square steel pipe, a thickness of the square steel pipe and a type of a pipe bending machine according to a design drawing of a ring beam, wherein the mold is matched according to the design requirement of the ring beam, the material type and the thickness of the square steel pipe which meet the design requirement are adopted, the type of the pipe bending machine which meets the design requirement of the ring beam is selected, the pipe bending machine mainly comprises an oil cylinder, a host and a hydraulic pump station, it needs to be explained that items such as the smoothness, the hardness and the fit size of a cylinder barrel and a piston rod are required to be checked before the oil cylinder is assembled, the quality of a forge piece and a sealing piece is required to be checked, parts used for assembling the oil cylinder meet the standard, the oil cylinder is subjected to a pressure test after being assembled, the host comprises a bottom frame, an oil cylinder supporting plate, a movable push plate, a pipe tightening platform and a tightening roller, and the movable push plate and the bottom frame are matched in a structure mode of an upper pulley and a side sliding plate, the lateral bending of the oil cylinder is effectively protected by increasing the stability and reliability of the equipment, and the pump station is connected by adopting an integrated block, so that the leakage is stable and avoided, and further the preparation work before the square steel pipe is processed is completed.
The square steel pipe is hoisted to the pipe bending machine, the square steel pipe is positioned through the die, the intermediate frequency power supply is started, the square steel pipe is subjected to bending processing, the bent steel pipe is finally formed, the bent steel pipe is detected and shaped, the ring beam is manufactured, the integral bending forming of the square steel pipe is achieved, the appearance quality is attractive, the welding work is reduced, and the production efficiency is further improved.
Referring to fig. 2, fig. 2 is a flowchart illustrating steps of an embodiment of a detailed flow of a preparation process before a square steel pipe is machined in step S100 of fig. 1, wherein step S100 includes, but is not limited to, step S110, step S120, and step S130.
Step S110, determining an intermediate frequency coil and a clamp according to the specification of the square steel pipe, and replacing the intermediate frequency coil and the clamp on a pipe bender;
step S120, manufacturing a profiling mold according to the bending radius and the bending angle of the bent steel pipe, wherein the profiling mold is made of wood or aluminum alloy materials;
step S130, a measuring instrument for detecting the bent steel pipe is prepared.
And determining an applicable intermediate frequency coil and a fixture according to the specification of the square steel pipe, and replacing the intermediate frequency coil and the fixture on the pipe bender for standby use.
The profiling is manufactured according to the bending radius and the bending angle of a bent steel pipe, the profiling is made of wood or aluminum alloy materials, it needs to be explained that for a sleeve cage ring beam, the sleeve cage ring beam is a common structural component well known to those skilled in the art, the bending inner diameter is larger than 4m, the arc length of a profiling sample plate is 1.5m, the bending radius is smaller than 4m, the arc length of the profiling sample plate is 1m, it needs to be further explained that the contact surface of the profiling and a workpiece is polished, the surface is smooth and free of burrs, and further the forming effect of the bent steel pipe is improved.
Will be used for detecting the measuring tool of curved steel pipe to prepare completely, need to explain, the measuring tool includes the steel sheet calibrator, measures the chi utensil, a plurality of magnetic seat frock and a plurality of cotton thread, a plurality of magnetic seat frock and cotton thread are used for measuring the torsion degree and the plane degree of curved steel pipe, measure the chi utensil and include 5m tape measure, 10m tape measure, 20m tape measure, guiding ruler, slide caliper, steel plate chi and square, need further explain that, the steel sheet calibrator thickness measuring scope is 0.75mm-300mm, measuring error: 1 mm-10 mm: plus or minus 0.05 mm; 10 mm-200 mm (. + -. 0.5% H +0.1) mm.
Referring to fig. 3, fig. 3 is a flowchart of steps of an embodiment of a refinement process of step S200 in fig. 1, where step S200 includes, but is not limited to, step S210, step S220, step S230, and step S240.
S210, when the square steel pipe is hoisted, checking a steel wire rope, a clamping ring and a hoisting angle, and ensuring that the hoisting weight is within the safety coefficient range of the steel wire rope;
step S220, additionally arranging a cushion block at the bottom of the square steel pipe, wherein a lifting lug connected with a steel wire rope is arranged on the cushion block;
step S230, after the square steel pipe is hoisted to a station through a crane, the square steel pipe is fixed with the station through a tightening fixture;
and S240, obtaining the bending position of the square steel pipe through calculation according to a design drawing of the ring beam.
When the steel pipe of the other side is hoisted, the steel wire rope, the clamping ring and the hoisting angle need to be checked firstly, whether the hoisting angle is reasonable or not is checked, whether the steel wire rope and the clamping ring are qualified or not is checked, and the hoisting weight is ensured to be within the safety coefficient range of the steel wire rope.
Install the cushion additional in square steel pipe bottom, be provided with the lug of being connected with wire rope on the cushion, it needs to explain that, will steadily when the other side steel pipe hoists, the staff need not stand by the below of hanging square steel pipe, when the upper end and the lower extreme of square steel pipe installed the cushion additional, the position that the operator stood will stabilize, safety to be provided with the lug on the cushion of being changed.
After the square steel pipe is hoisted to the station through the crane, the square steel pipe is fixed with the station through tightening up the fixture, it needs to be explained that after the square steel pipe is hoisted to the station, whether the position of the square steel pipe is correct is checked, the square steel pipe is prevented from inclining or twisting, the fixture is tightened up and fixed after the position of the square steel pipe is correct, according to the design drawing of the ring beam, the bending position of the square steel pipe is obtained through calculation, and then the positioning of the other side steel pipe is completed.
Referring to fig. 4, fig. 4 is a flowchart illustrating steps of an embodiment of a refinement process of calculating a kick-off position of a square steel pipe in step S240 in fig. 3, where the step S240 includes, but is not limited to, step S241.
And S241, obtaining the length of the bent section of the square steel pipe according to calculation, and positioning and scribing the square steel pipe.
Obtaining the length of the bending section of the square steel pipe according to calculation, and positioning and marking on the square steel pipe, wherein the length of the bending section is as follows: l ═ pi aR/180 where: l is the length of the bending section and the unit is mm; a is the bending angle in degrees; r is the bending radius of the central line of the bent pipe section.
Referring to fig. 5, fig. 5 is a flowchart illustrating steps of an embodiment of a refinement process of step S300 in fig. 1, where step S300 includes, but is not limited to, step S310, step S320, step S330, and step S340.
Step S310, when the steel pipe of the other side is hoisted, the steel wire rope, the clamping ring and the hoisting angle are checked, and the hoisting weight is ensured to be within the safety coefficient range of the steel wire rope;
step S320, after the intermediate frequency power supply is started, heating the square steel pipe to the lowest temperature for bending the steel pipe, adjusting the oil amount, and starting to push the pipe;
step S330, in the process of bending the square steel pipe, the pipe bender, the cooling water system and the oil pump system need to be checked for many times, and when abnormality is checked, the pipe bender, the cooling water system and the oil pump system are stopped;
and S340, obtaining a bent steel pipe after the processing of the steel pipe of the other side is finished, and obtaining the ring beam after the first wall thickness measurement, product shaping, radian inspection and second wall thickness measurement are carried out on the bent steel pipe.
Before the steel pipe is subjected to simmering bending processing, a pipe bending machine, an intermediate frequency power supply, a cooling water system and an oil pump system need to be checked, and before the pipe bending machine is started, a main machine, an auxiliary machine, a water pump, an oil pump, an air compressor and the like of the pipe bending machine are firstly checked to be normal and intact; then checking the intermediate frequency power supply to ensure that each element is normal and intact and is in a standby state; starting a cooling water system, and adjusting the water pressure to the pressure required by the square steel pipe when the square steel pipe is subjected to bending; and starting an oil pump, checking an oil pump system, placing an oil quantity control valve at a closed position, and adjusting other valves to be in a state of bending the steel pipe of the other side.
After the intermediate frequency power supply is started, the square steel pipe is heated to the minimum temperature for bending the bent steel pipe, the oil amount is adjusted, and pipe pushing is started.
In the process of bending a square steel pipe, the pipe bending machine, the cooling water system and the oil pump system need to be checked for many times, when abnormity is detected, the pipe bending machine, the cooling water system and the oil pump system are stopped, the bent steel pipe is obtained after the processing of the other side steel pipe is completed, and the ring beam is obtained after the first wall thickness measurement, product shaping, radian inspection and the second wall thickness measurement are carried out on the bent steel pipe.
Referring to fig. 6, fig. 6 is a flow chart of steps of one embodiment of the refinement flow in step S310 of fig. 5, where step S310 includes, but is not limited to, step S311.
And step S311, ensuring that the pushing speed of the pushing pipe is increased or decreased to be matched with the heating temperature, and ensuring that the heating temperature does not exceed the phase change transition temperature of the square steel pipe.
When the push pipe starts, the push speed, the heating temperature and the power need to be closely monitored, and the push speed increase and decrease need to be matched with the temperature, so that the heating temperature is ensured not to exceed the phase change transition temperature of the material. For square steel pipes of carbon steel and low-alloy structural steel, the heating temperature should not exceed 750 ℃, and the bending speed of the square steel pipe is controlled to be 30-60 mm/min.
The thick-wall alloy pipe diathermy method is adopted to perform diathermy test on the bent steel pipe, low power is utilized, diathermy time is prolonged, the temperature of the outer wall of the bent steel pipe is not more than 750 ℃, the temperature of the inner wall of the bent steel pipe reaches about 600 ℃, the pipe is slowly pushed to bend the pipe, the power is raised while the pipe is pushed, the temperature and the pushing speed of the bent steel pipe are strictly controlled, and then the pipe is bent according to rated parameters.
Referring to fig. 7, fig. 7 is a flowchart of steps of an embodiment of the refinement process in step S330 in fig. 5, where step S330 includes, but is not limited to, step S331, step S332, step S333, and step S334.
S331, checking the running conditions of a water pump, an oil pump and an air compressor, and timely processing the abnormity;
s332, monitoring the peripheral clearance between the induction coil and the bent steel pipe and the cooling condition of the spray holes, and adjusting and passing through holes when abnormality occurs;
step S333, checking the oil cylinder and ensuring that air does not leak into the oil cylinder;
and step S334, ensuring that no obstacle obstructing the operation of the machine tool exists around the pipe bender, and frequently oiling the rail, the screw rod and the lubricating part.
It should be noted that when the other steel pipe is subjected to simmering, the operation conditions of a water pump, an oil pump and an air compressor of the pipe bender need to be checked in real time, abnormality should be handled in time when the abnormality is found, the peripheral gap between the induction coil and the bent steel pipe and the cooling condition of the spray holes are monitored, the bent steel pipe needs to be adjusted and the spray holes need to be perforated when the abnormality is found, so that the heating belt of the bent steel pipe is normal to ensure the quality of the bent steel pipe, the oil cylinder is often checked to ensure that no air leaks into the oil cylinder, and the phenomenon that the climbing is too large or the oil pressure is unstable to influence the quality of the bent steel pipe is avoided.
Referring to fig. 8, fig. 8 is a flowchart illustrating steps of an embodiment of the refinement process in step S330 in fig. 5, wherein step S330 includes, but is not limited to, step S335 and step S336.
Step S335, stopping the pipe bender, the cooling water system and the oil pump system in time after water and power failure;
and step S336, the stopping sequence is that the heating power supply and the oil quantity control valve are stopped firstly, then cooling water or compressed air is stopped according to the cooling condition of the heating belt, the front clamping head is loosened immediately, then the oil cylinder is retracted, and finally each accessory system is stopped.
It should be noted that when water and power are cut off, the pipe bender, the cooling water system and the oil pump system should be stopped in time, the oil cylinder is retracted in time, and when the pipe bending is continued in a hot state of the bent steel pipe, the rotating arm is retracted slightly, so that the bent steel pipe is restarted to bend the pipe without stress, and the phenomenon of waviness or cold drawing at the connecting pipe of the bent steel pipe is avoided.
It needs to be further explained that the shutdown sequence is to stop the heating power supply and the oil mass control valve, then stop cooling water or compressed air according to the cooling condition of the heating belt, and immediately loosen the front chuck to prevent the chuck from being opened easily due to resilience force after cooling, then return the oil cylinder, and finally stop each accessory system.
It should be further noted that in order to ensure that no obstacles obstructing the operation of the machine tool are provided around the pipe bender, to improve the safety of the bending process, oil should be frequently added to the rail, the screw rod and the lubrication portion, so as to ensure the cleanness.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. The ring beam bending process is characterized by comprising the following steps of:
confirming a mold for bending, the material of the square steel pipe, the plate thickness of the square steel pipe and the model of a pipe bender according to a design drawing of a ring beam, and completing preparation work before the square steel pipe is processed;
hoisting the square steel pipe to the pipe bender through a crane, and positioning the square steel pipe through the die; and
and starting the intermediate frequency power supply on the pipe bender, carrying out bending machining on the square steel pipe to form a bent steel pipe, and detecting and shaping the bent steel pipe to finish the manufacture of the ring beam.
2. The ring beam simmer bending process according to claim 1, wherein the preparation work before the square steel pipe is processed comprises the following steps:
determining an intermediate frequency coil and a clamp according to the specification of the square steel pipe, and replacing the intermediate frequency coil and the clamp on the pipe bender;
manufacturing a profiling mold according to the bending radius and the bending angle of the bent steel pipe, wherein the profiling mold is made of wood or aluminum alloy materials; and
and (3) preparing a measuring instrument for detecting the bent steel pipe.
3. The ring beam simmer bending process according to claim 2, wherein the contact surface of the profiling and the workpiece needs to be ground and polished.
4. The ring beam bending machine process according to claim 2, wherein the measuring apparatus comprises a steel plate thickness gauge, a measuring ruler, a plurality of magnetic seat tools and a plurality of cotton threads, and the plurality of magnetic seat tools and the cotton threads are used for measuring the torsion degree and the flatness degree of the bent steel pipe.
5. The ring beam simmer bending process according to claim 1, wherein the hoisting the square steel tube to the tube bender through a crane and the positioning the square steel tube through the mold comprises:
when the square steel pipe is hoisted, the steel wire rope, the clamping ring and the hoisting angle are checked, and the hoisting weight is ensured to be within the safety coefficient range of the steel wire rope;
additionally arranging a cushion block at the bottom of the square steel pipe, wherein a lifting lug connected with the steel wire rope is arranged on the cushion block;
after the square steel pipe is hoisted to a station through the crane, the square steel pipe is fixed with the station through a tightening clamp; and
and according to the design drawing of the ring beam, calculating to obtain the bending position of the square steel pipe.
6. The ring beam simmer bending process according to claim 5, wherein the calculating of the bending position of the square steel pipe comprises: and obtaining the length of the bending section of the square steel pipe according to calculation, and positioning and marking on the square steel pipe.
7. The ring beam simmer bending process according to claim 1, wherein the starting of the medium frequency power supply on the pipe bender, the simmer bending of the square steel pipe to form a bent steel pipe, the detection and shaping of the bent steel pipe, and the completion of the manufacture of the ring beam comprises:
before the square steel pipe is subjected to bending processing, the pipe bender, the intermediate frequency power supply, the cooling water system and the oil pump system need to be checked;
after the intermediate frequency power supply is started, heating the square steel pipe to the lowest temperature for bending the bent steel pipe, adjusting the oil amount, and starting to push the pipe;
in the process of bending the square steel pipe, the pipe bender, the cooling water system and the oil pump system need to be checked for many times, and when abnormality is checked, the pipe bender, the cooling water system and the oil pump system are stopped; and
and when the square steel pipe is processed, the bent steel pipe is obtained, and the ring beam is obtained after the first wall thickness measurement, product shaping, radian inspection and second wall thickness measurement are carried out on the bent steel pipe.
8. The ring beam simmer bending process of claim 7, wherein after the intermediate frequency power supply is started, the square steel pipe is heated to the minimum temperature for simmer bending of the bent steel pipe, the oil amount is adjusted, and the pipe pushing is started comprises the following steps: ensuring that the pushing speed of the pushing pipe is increased or decreased to be matched with the heating temperature and ensuring that the heating temperature does not exceed the phase change transition temperature of the square steel pipe.
9. The ring beam simmer bending process of claim 7, wherein the plurality of inspections of the pipe bender, the cooling water system and the oil pump system during the simmer bending process of the square steel pipe comprise:
checking the running conditions of a water pump, an oil pump and an air compressor, and timely processing the abnormity;
monitoring the peripheral clearance between the induction coil and the bent steel pipe and the cooling condition of the spray holes, and adjusting and passing through the holes when abnormality occurs;
checking the oil cylinder and ensuring that air does not leak into the oil cylinder; and
and obstacles which hinder the operation of the machine tool do not exist around the pipe bender, and oil is frequently added to the rail, the screw rod and the lubricating part.
10. The ring beam simmer bending process according to claim 7, wherein when an abnormality is detected, the shutdown process of the bender, the cooling water system, and the oil pump system includes:
when water and power are cut off, the pipe bender, the cooling water system and the oil pump system are stopped in time; and
the shutdown sequence is that the heating power supply and the oil quantity control valve are stopped firstly, then cooling water or compressed air is stopped according to the cooling condition of the heating belt, the front chuck is loosened immediately, then the oil cylinder is retracted, and finally each accessory system is stopped.
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| JPH10236248A (en) * | 1996-12-24 | 1998-09-08 | Unie Press Kk | Bumper beam for automobile, and its manufacture |
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| CN110524190A (en) * | 2019-07-15 | 2019-12-03 | 广州文冲船厂有限责任公司 | A kind of production method being bent square tube |
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- 2021-06-02 CN CN202110615302.XA patent/CN113523046B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10236248A (en) * | 1996-12-24 | 1998-09-08 | Unie Press Kk | Bumper beam for automobile, and its manufacture |
| CN201455064U (en) * | 2009-08-14 | 2010-05-12 | 郑州华电金源管道有限公司 | Intermediate-frequency heating cold bend processing equipment |
| KR20120077092A (en) * | 2010-12-30 | 2012-07-10 | 주식회사 성우하이텍 | Round bender and roll forming system provided with the same |
| CN103506446A (en) * | 2013-07-15 | 2014-01-15 | 天津市宝超科技有限公司 | Device for machining steel-structure arc beam for building |
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| CN113523046B (en) | 2022-09-23 |
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