CN103801600A - Continuous push type medium frequency heating bent pipe machining device and machining method - Google Patents
Continuous push type medium frequency heating bent pipe machining device and machining method Download PDFInfo
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- CN103801600A CN103801600A CN201410053814.1A CN201410053814A CN103801600A CN 103801600 A CN103801600 A CN 103801600A CN 201410053814 A CN201410053814 A CN 201410053814A CN 103801600 A CN103801600 A CN 103801600A
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Abstract
The invention relates to a continuous push type medium frequency heating bent pipe machining device and machining method. The continuous push type medium frequency heating bent pipe machining device comprises a bending machine and a medium frequency heating device, wherein the bending machine comprises an operation platform and a bending assembly; the medium frequency heating device comprises an induction coil and an electric appliance case; the bending machine further comprises a machine frame, a hydraulic pushing assembly and a straight pipe clamping block; the hydraulic pushing assembly is installed on the machine frame; the straight pipe clamping block is fixedly connected with the advancing end of the hydraulic pushing assembly; the induction coil is fixedly arranged on a pipe to be bent, and the pipe to be bent is close to one side of the bending assembly; the pipe to be bent is pushed by the hydraulic pushing assembly to pass through the induction coil step by step and is bent under the guiding of the bending assembly. On one hand, the hydraulic pushing assembly is utilized for pushing the pipe to be bent to move forwards, and the machining accuracy and working efficiency of the bent pipe can be improved. On the other hand, the pipe to be bent directly enters the bending assembly after being heated by the induction coil, temperature of the pipe is effectively prevented from reducing after medium frequency heating, and the yield and quality of the bent pipe are improved.
Description
Technical field
The invention belongs to shape or bending pipes technical field, relate in particular to a kind of process equipment and processing method of continuous pushing type hot elbowing by inductive heating.
Background technology
Intermediate frequency heater is a kind of supply unit that power frequency 50Hz alternating current is changed into intermediate frequency (300Hz is above to 1000Hz), its basic principle is: becoming direct current after three-phase main-frequency AC rectification, again direct current is become to adjustable electric current of intermediate frequency, supply with by the intermediate frequency alternating current flowing through in electric capacity and induction coil, in induction coil, produce the highdensity magnetic line of force, and cut the metal material holding in induction coil, in metal material, produce very large eddy current.Because this mode of heating programming rate is fast, oxidation is few, low power consuming, pollution-free, and the oxidization burning loss of heating in medium frequency forging only for the oxidization burning loss of 0.5%(gas burner heating is 2%, coal furnace reaches 3%), thereby intermediate frequency heater heats with respect to gas burner or coal furnace is compared, at least saving steel raw material 20-50 kilogram.
Along with greatly developing of high-power, overcritical power station unit, caliber and the wall thickness of various tube connectors increase gradually, existing cold bending equipment cannot carry out bending machining, now only have the welding manners such as the electric welding of use to connect, but welding must need to increase a large amount of weld bonds, affect the stability of pipeline, easily produce the problems such as leakage, fracture.The patent No. is that the Chinese invention patent of 200910065792.X discloses a kind of processing method for cold bending pipes, first need the position of bending to adopt the method for heating in medium frequency to be heated to certain temperature to pipeline, then pipeline is carried out to bending, this method operating efficiency is high, alleviated labor strength.But the pipeline that heating need to be reached to set point of temperature is transported on forming mill and is bent by frequency heating device, easily cause the pipeline that is already heated to lower limit critical-temperature to move to temperature decline while bending position, make pipeline cannot bend or easily cause the lifting of percent defective.
Summary of the invention
The present invention seeks to provide in order to overcome the deficiencies in the prior art a kind of process equipment to the continuous pushing type hot elbowing by inductive heating and then bending after pipeline heating in medium frequency.
For achieving the above object, the technical solution used in the present invention is: a kind of process equipment of continuous pushing type hot elbowing by inductive heating, comprise bending machine and frequency heating device, described bending machine comprises operating platform, be arranged at the assembly that bends for the pipeline to be bending that leads on operating platform, described frequency heating device comprises the induction coil for pipeline to be bending is heated, be electrically connected for generation of the electric appliance box of intermediate frequency power supply with induction coil, it is characterized in that: described bending machine also comprises the frame with the described adjacent setting of operating platform, rack-mounted hydraulic drive assembly, the straight tube clamp being fixedly connected with the described front inlet side of hydraulic drive assembly, described pipeline to be bending is arranged on described straight tube clamp and bends between assembly, described induction coil fixed cover is located near bending on the pipeline to be bending of assembly one side, described pipeline to be bending is progressively realized bend pipe processing under hydraulic drive components drive by described induction coil and under the described guiding that bends assembly.
Optimally, described hydraulic drive assembly comprises the operating cylinder that is installed in frame, is connected with operating cylinder and is provided with the fuel tank of electric oil pump, described straight tube clamp is fixed on described operating cylinder end, and the center of described operating cylinder, straight tube clamp and induction coil is on same level line.
Further, in the frame between described hydraulic drive assembly and induction coil, intermediate roller is also installed.
Optimally, described frequency heating device also comprises cooling water tank, and described cooling water tank is connected with induction coil by coolant guide pipe.
Optimally, described bend that assembly comprises the turning cylinder that is installed on operating platform, is installed on the bending die on turning cylinder, the directive wheel being connected with bending die, with directive wheel bend pipe end connected vertically clamp, described bend pipe end clamp has two states, when in the first state, induction coil axial line and bend pipe end clamp axial line are on same level line; When in the second state, induction coil axial line and bend pipe end clamp axial line form angle.
The present invention also provides a kind of processing method of hot elbowing by inductive heating, comprises the following steps successively:
(a) one end of pipeline to be bending is fixed on straight tube clamp, the other end is fixed on bend pipe end clamp, pipeline is needed the position of bending to be inserted in induction coil simultaneously, then, when opening electric appliance box and opening intermediate frequency power supply and need the position of bending to be heated to following 50 ~ 70 ℃ of pipeline material lower limit critical-temperature to pipeline, close intermediate frequency power supply;
(b) start hydraulic pressure pushing component pipeline to be bending is progressively pushed ahead, form heating region on pipeline, described heating region carries out bending under the guiding that bends assembly, thereby realizes bending of pipeline.
Optimally, in described step (a), pipeline is needed, before the position heating of bending, pipeline to be bending is passed to intermediate roller.
Optimally, in described step (a), in opening electric appliance box unlatching intermediate frequency heater, in induction coil, pass into cooling water.
Because technique scheme is used, the present invention compared with prior art has following advantages: the process equipment of continuous pushing type hot elbowing by inductive heating of the present invention, utilize hydraulic drive components drive pipeline to be bending to move forward on the one hand, can improve machining accuracy and the operating efficiency of bend pipe, and then improve automaticity and reduce human cost; After utilizing on the other hand induction coil to heat pipeline to be bending, directly enter and bend assembly, can effectively avoid the reduction of pipe temperature after heating in medium frequency, improved yield rate and the quality of bend pipe.
Accompanying drawing explanation
The structural representation of the process equipment that accompanying drawing 1 is continuous pushing type hot elbowing by inductive heating of the present invention in the time that pipeline to be bending is straight tube;
The structural representation of the process equipment that accompanying drawing 2 is continuous pushing type hot elbowing by inductive heating of the present invention in the time that pipeline to be bending is bend pipe;
Wherein: 1, bending machine; 11, operating platform; 12, bend assembly; 121, turning cylinder; 122, bending die; 123, directive wheel; 124, bend pipe end clamp; 13, frame; 14, hydraulic drive assembly; 141, operating cylinder; 142, electric oil pump; 143, fuel tank; 15, straight tube clamp; 2, frequency heating device; 21, induction coil; 22, electric appliance box; 23, cooling water tank; 24, coolant guide pipe; 3, intermediate roller; 4, pipeline to be bending.
The specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the invention is elaborated:
This example provides a kind of process equipment of continuous pushing type hot elbowing by inductive heating, as depicted in figs. 1 and 2, mainly comprises bending machine 1 and frequency heating device 2.
Wherein, bending machine 1 comprise operating platform 11, bend assembly 12, frame 13, hydraulic drive assembly 14, straight tube clamp 15.In these parts, bend assembly 12 and be arranged on operating platform 11 for the pipeline 4 to be bending that leads; Frame 13 setting adjacent with operating platform 11, and its upper surface is provided with hydraulic drive assembly 14; Straight tube clamp 15 is fixedly connected with the front inlet side of hydraulic drive assembly 14.Frequency heating device 2 comprises induction coil 21 for pipeline to be bending is heated, is electrically connected for generation of the electric appliance box 22 of intermediate frequency power supply with induction coil.Pipeline 4 to be bending is arranged on described straight tube clamp 15 and bends between assembly 12, and it is arranged with induction coil 21 near a side that bends assembly 12, and it progressively by induction coil 21, realizes bend pipe processing under the promotion of hydraulic drive assembly 14 under the guiding that bends assembly 12.Utilize hydraulic drive assembly 14 to promote pipeline 4 to be bending and move forward, can improve machining accuracy and the operating efficiency of bend pipe, and then improve automaticity; And directly enter and bend assembly 12 after 21 heating of the sensed circle of pipeline 4 to be bending, can effectively avoid the reduction of pipe temperature after heating in medium frequency, improve yield rate and the quality of bend pipe.
In the present embodiment, hydraulic drive assembly 14 comprises the operating cylinder 141 that is installed in frame, is connected with operating cylinder 141 and is provided with the fuel tank 143 of electric oil pump 142, straight tube clamp 15 is fixed on operating cylinder 141 ends, operating cylinder 141, straight tube clamp 15 and induction coil 21 center are on same level line, promoting pipeline 4 to be bending by operating cylinder 141 moves forward gradually, realize the accurate control of pipeline 4 displacements to be bending, convenient operation, realized do mechanization operation, alleviate hand labor intensity, reduced human cost; And in frame 13 between hydraulic drive assembly 14 and induction coil 21, intermediate roller 3 is also installed, there is not bending for guaranteeing at the axial line of the process that bends pipeline 9 to be bending.Because induction coil 21 is main place that electromagnetic induction occurs, its temperature is very high, therefore frequency heating device 2 also comprises cooling water tank 23, this cooling water tank 23 is connected with induction coil 21 by coolant guide pipe 24, cooling for induction coil 21 is carried out, can extend service life of induction coil 21.
Bend that assembly 12 comprises the turning cylinder 121 that is installed on operating platform 11, is installed on the bending die 122 on turning cylinder 121, the directive wheel 123 being connected with bending die 122, with directive wheel 123 bend pipe end connected vertically clamp 124, utilize such bend assembly 12 and can pipeline 4 to be bending be bent more smoothly.In the time being arranged on pipeline to be bending 4 on process equipment and not bent, induction coil 21 axial lines and bend pipe end clamp 124 axial lines are on same level line; Subsequently pipeline 4 to be bending is needed the position frequency heating device 2 of bending to be heated to proper temperature, under the promotion of hydraulic drive assembly 14, pipeline 4 to be bending is bent gradually, and now induction coil 21 axial lines and bend pipe end clamp 124 axial lines form angle.
This example provides a kind of processing method of hot elbowing by inductive heating, comprises the following steps successively:
(a) one end of pipeline to be bending is fixed on straight tube clamp, the other end is fixed on bend pipe end clamp, pipeline is needed the position of bending to be inserted in induction coil simultaneously, then, when opening electric appliance box and opening intermediate frequency power supply and need the position of bending to be heated to following 50 ~ 70 ℃ of pipeline material lower limit critical-temperature to pipeline, close intermediate frequency power supply;
(b) start hydraulic pressure pushing component pipeline to be bending is progressively pushed ahead, form heating region on pipeline, described heating region carries out bending under the guiding that bends assembly, thereby realizes bending of pipeline.
In the present embodiment, pipeline is needed before the position heating of bending, be by pipeline to be bending through intermediate roller, in process, there is bending bending in the axial line that prevents pipeline to be bending; And in opening electric appliance box unlatching intermediate frequency heater, should in induction coil, pass into cooling water, reduce induction coil temperature.
Above-described embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (8)
1. the process equipment of a continuous pushing type hot elbowing by inductive heating, comprise bending machine and frequency heating device, described bending machine comprises operating platform, be arranged at the assembly that bends for the pipeline to be bending that leads on operating platform, described frequency heating device comprises the induction coil for pipeline to be bending is heated, be electrically connected for generation of the electric appliance box of intermediate frequency power supply with induction coil, it is characterized in that: described bending machine also comprises the frame with the described adjacent setting of operating platform, rack-mounted hydraulic drive assembly, the straight tube clamp being fixedly connected with the described front inlet side of hydraulic drive assembly, described pipeline to be bending is arranged on described straight tube clamp and bends between assembly, described induction coil fixed cover is located near bending on the pipeline to be bending of assembly one side, described pipeline to be bending is progressively realized bend pipe processing under hydraulic drive components drive by described induction coil and under the described guiding that bends assembly.
2. the process equipment of continuous pushing type hot elbowing by inductive heating according to claim 1, it is characterized in that: described hydraulic drive assembly comprises the operating cylinder that is installed in frame, is connected with operating cylinder and is provided with the fuel tank of electric oil pump, described straight tube clamp is fixed on described operating cylinder end, and the center of described operating cylinder, straight tube clamp and induction coil is on same level line.
3. the process equipment of continuous pushing type hot elbowing by inductive heating according to claim 2, is characterized in that: in the frame between described hydraulic drive assembly and induction coil, intermediate roller is also installed.
4. the process equipment of continuous pushing type hot elbowing by inductive heating according to claim 1, is characterized in that: described frequency heating device also comprises cooling water tank, and described cooling water tank is connected with induction coil by coolant guide pipe.
5. the process equipment of continuous pushing type hot elbowing by inductive heating according to claim 1, it is characterized in that: described bend that assembly comprises the turning cylinder that is installed on operating platform, is installed on the bending die on turning cylinder, the directive wheel being connected with bending die, with directive wheel bend pipe end connected vertically clamp, described bend pipe end clamp has two states, when in the first state, induction coil axial line and bend pipe end clamp axial line are on same level line; When in the second state, induction coil axial line and bend pipe end clamp axial line form angle.
6. utilize in claim 1 to 5 processing method for process equipment described in any one, it is characterized in that: comprise the following steps successively:
(a) one end of pipeline to be bending is fixed on straight tube clamp, the other end is fixed on bend pipe end clamp, pipeline is needed the position of bending to be inserted in induction coil simultaneously, then, when opening electric appliance box and opening intermediate frequency power supply and need the position of bending to be heated to following 50 ~ 70 ℃ of pipeline material lower limit critical-temperature to pipeline, close intermediate frequency power supply;
(b) start hydraulic pressure pushing component pipeline to be bending is progressively pushed ahead, form heating region on pipeline, described heating region carries out bending under the guiding that bends assembly, thereby realizes bending of pipeline.
7. processing method according to claim 6, is characterized in that: in described step (a), pipeline is needed, before the position heating of bending, pipeline to be bending is passed to intermediate roller.
8. processing method according to claim 6, is characterized in that: in described step (a), in opening electric appliance box unlatching intermediate frequency heater, in induction coil, pass into cooling water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410053814.1A CN103801600A (en) | 2014-02-18 | 2014-02-18 | Continuous push type medium frequency heating bent pipe machining device and machining method |
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| CN201410053814.1A CN103801600A (en) | 2014-02-18 | 2014-02-18 | Continuous push type medium frequency heating bent pipe machining device and machining method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104723107A (en) * | 2015-03-10 | 2015-06-24 | 阜新华通管道有限公司 | Continuous pushing and cutting equipment for entire pipe of bend |
| CN106493203A (en) * | 2015-09-07 | 2017-03-15 | 天津嘉泰盈顺健身器材有限公司 | A kind of steel pipe bending device with Electromagnetic Heating function |
| CN109175024A (en) * | 2018-10-30 | 2019-01-11 | 江苏电力装备有限公司 | A kind of processing method and bend pipe of bend pipe |
| CN110303299A (en) * | 2019-07-02 | 2019-10-08 | 上海一芯智能科技有限公司 | Bend pipe processing method suitable for gate |
| CN113878034A (en) * | 2021-09-07 | 2022-01-04 | 天津大学 | Multi-order ovality machining and forming method for metal pipeline |
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| DE3634672A1 (en) * | 1986-10-09 | 1988-04-14 | Mannesmann Ag | Apparatus for the hot bending of metal tubes and a method for the production of a tube bend |
| CN1033891A (en) * | 1987-12-31 | 1989-07-12 | 华北电力学院北京研究生部 | Computer monitoring Medium frequency induction spot heating hydraulically-pushing pipe bending machine |
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| DE3634672A1 (en) * | 1986-10-09 | 1988-04-14 | Mannesmann Ag | Apparatus for the hot bending of metal tubes and a method for the production of a tube bend |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104723107A (en) * | 2015-03-10 | 2015-06-24 | 阜新华通管道有限公司 | Continuous pushing and cutting equipment for entire pipe of bend |
| CN106493203A (en) * | 2015-09-07 | 2017-03-15 | 天津嘉泰盈顺健身器材有限公司 | A kind of steel pipe bending device with Electromagnetic Heating function |
| CN109175024A (en) * | 2018-10-30 | 2019-01-11 | 江苏电力装备有限公司 | A kind of processing method and bend pipe of bend pipe |
| CN110303299A (en) * | 2019-07-02 | 2019-10-08 | 上海一芯智能科技有限公司 | Bend pipe processing method suitable for gate |
| CN113878034A (en) * | 2021-09-07 | 2022-01-04 | 天津大学 | Multi-order ovality machining and forming method for metal pipeline |
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Application publication date: 20140521 |