CN102784821A - Coreless pipe-bending machine - Google Patents
Coreless pipe-bending machine Download PDFInfo
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- CN102784821A CN102784821A CN2012102766463A CN201210276646A CN102784821A CN 102784821 A CN102784821 A CN 102784821A CN 2012102766463 A CN2012102766463 A CN 2012102766463A CN 201210276646 A CN201210276646 A CN 201210276646A CN 102784821 A CN102784821 A CN 102784821A
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Abstract
The invention discloses a coreless pipe-blending machine in the field of pipe processing equipment. The coreless pipe-blending machine is provided with a hydraulic push plate, a pipe bending device and an inductive heating ring, wherein the hydraulic push plate is fixedly arranged on a base and is fixedly provided with a rear clamp; a pipe blank guide holder is further arranged on the base; the pipe blank guide holder is provided with at least one pair of guide rolls; the pipe bending device comprises a rotary force arm shaft arranged on a rotary force arm base; a rotary force arm clamp is sleeved on the rotary force arm shaft; a rotary force arm pull rod is clamped on the rotary force arm clamp; a front clamp is fixedly arranged at the end part of the rotary force arm pull rod; and the inside angle, which is back on to the rack, of the inductive heating ring is provided with a plurality of water spray holes. According to the coreless pipe-bending machine, water spray cooling and sizing are carried out on a bent pipe which is heated to be bent, and the bent section of a pipe blank is controlled at a position through which the pipe blank gets out of the inductive heating ring, the stress concentration of the bent section is ensured, the processing precision of the bent pipe is improved, the percent of pass of the bent pipe is improved, and the coreless pipe-bending machine can be used for precision machining of the bent pipes.
Description
Technical field
The present invention relates to a kind of pipe fitting process equipment, particularly a kind of bending machine.
Background technology
Bend pipe is one of important composition member of pipe-line, and long-distance transmission pipeline needs a large amount of bend pipes.Bend pipe also is to carry one of comparatively harsh structural member in the pipeline.In the pipeline that builds up operation, the pipeline failure accidents relevant with bend pipe occupied quite high ratio in whole pipeline accident, and the comprehensive quality of bend pipe is one of bottleneck of restriction pipeline safety even running.
The induction heating syphon production technology is fully used eddy-current heating and is had rapid, narrow, the fast cooling characteristics in heating tape of heating; The induction heating syphon method has than other method that ovality is little, wall thickness reduction is minimum and plurality of advantages such as bending radius is easy to adjust, and it is the most cost-effective a kind of in the existing various bent tube techniques that intermediate frequency picks bent tube technique.Adopt Frequency Induction Heating, bend pipe chimb tube wall is drawn attenuate, concave edge wall compression to thicken and the even phenomenon of bend pipe wall unevenness that causes when having avoided traditional bent tube technique to be shaped.
A kind of medium frequency bending of pipe machine of realizing complex bend is disclosed in the prior art, its notification number: CN202114111, the patent No.: 201120182352.5, comprising: a, a pivoted arm with main axis rotation, this main shaft is perpendicular to the XY plane; B, be arranged at the chuck on the said pivoted arm; C, be positioned at the Frequency Induction Heating circle of main shaft sidepiece; D, be positioned at this Frequency Induction Heating circle front end and be used to make pipe with the direction that is parallel to the XY plane guider through the Frequency Induction Heating circle; The drive unit of e, the motion of promotion pipe; F, make said pivoted arm drive mechanism along the main shaft axially-movable when rotating.
Its weak point is: in the process of main shaft rotational deformation, owing to the pipe after the heating can not in time be cooled off, and stress distribution is uneven in the BENDING PROCESS through the pipe after the induction heating circle heating; Thereby can not guarantee the even bending of pipe fitting, in case have locally when bigger flexural deformation takes place, the intensity of this position will descend fast; Cause the local crumple distortion in this position in the BENDING PROCESS; Thereby have a strong impact on the qualification rate of pipe fitting, and this device since rotating shaft to the fixed distance of chuck, this just makes when producing bend pipe; Crooked radian relative fixed; When processing the bend pipe of different radians if desired, then need change the pivoted arm of different size, thereby increase production cost.
Summary of the invention
The purpose of this invention is to provide a kind of centreless bending machine, guarantee that sweep is evenly crooked, improve product percent of pass, increase the scope of this device processing bend pipe.
The objective of the invention is to realize like this: a kind of centreless bending machine; Comprise the hydraulic pressure push pedal, swan neck system, the induction heating circle that are fixedly mounted on the support; Be installed with rear jig in the said hydraulic pressure push pedal, the pipe guide holder also is installed on the said support, on the said pipe guide holder at least one pair of guide roller is installed; Said swan neck system comprises the revolving force arm axle that is installed on the rotary arm base; Said rotary arm axle sleeve is equipped with the rotary arm anchor clamps, has clamped the rotary arm pull bar on the said rotary arm anchor clamps, and the end of rotary arm pull bar is installed with front jig; Said front jig, induction heating circle, the coaxial setting of rear jig, said induction heating circle offer some hole for water sprayings on the medial angle of board dorsad.
Before the work of the present invention, earlier pipe to be processed is installed on the support, an end of pipe is fixed on the rear jig; The middle part of pipe is installed between the guide roller, and the other end of pipe passes induction heating circle and is fixed on the front jig, and this moment, the rotary arm pull bar was in 0 ° of position; During work, start induction heating circle and hydraulic pressure push pedal, the hydraulic pressure push pedal promotes pipe and slowly moves forward; Induction heating circle heats the pipe of process, is fixed on pipe on the front jig along with the rotation of revolving force arm axle, and the pipe section that drives firm once heated is carried out bending in the induction heating circle exit; The cooling of under the slow promotion of hydraulic pressure push pedal, spraying water of pipe after the bending, the local strength of water spray cooling back elbow strengthens, and this part is finalized; Along with the slow promotion of hydraulic pressure push pedal, be that the position near induction coil is bent distortion all the time, finally realize the even moulding of bend pipe; After bending reached corresponding specification, shutdown system was taken off the bend pipe that machines; Forward the rotary arm pull bar to 0 ° of position, carry out the processing of next pipe again, whole bend fixing process can be divided into following three steps: eddy-current heating → thermal flexure → cooling and shaping.Compared with prior art, beneficial effect of the present invention is, the present invention is through to adding the local typing of cooling of in time spraying water of bend pipe after the thermal flexure; Having eliminated pipe causes the bend pipe bending inhomogeneous because stress distribution is inhomogeneous in the heating BENDING PROCESS; Occur the problem of crumple distortion easily, the pipe bending section is controlled at pipe just from the position that induction heating circle comes out, guaranteed that the stress of bending section is concentrated; Improve the machining accuracy of bend pipe, and improved the qualification rate of bend pipe.The present invention can be used in the Precision Machining of bend pipe.
More even in order to guarantee the water spray cooling, guarantee the typing effect, said hole for water spraying is distributed on the induction heating circle medial angle ringwise, offers the annular cooling water road that is communicated with hole for water spraying in the said induction heating circle, and the top of said cooling water channel is provided with water inlet pipe.
In order further to improve the machining accuracy of bend pipe, make bending section and cooling section be independent of each other, the water spray cooling section is arranged on the pipe face and has in hole for water spraying end face 20cm ~ 50cm scope apart from induction heating circle on the said pipe.The bending section length difference that the pipe of different size is required, and owing to the heat of tube surfaces causes bending section to be vulnerable to the cold water influence, if the water spray cooling section is near excessively apart from induction heating circle; Then bending section receives the cold water influence, then bending section typing too early, and the pipe bending deformation quantity is not enough; Thereby cause bend pipe defective; Cooled region is too far away from heating region, then can influence the distribution of stress, thereby causes the bend pipe distortion uncontrollable.
In order further to increase this device scope of application; The pipe of processing different size flexibility; Said rotary arm base slidably is installed on the rotary arm guide rail, and the end of rotary arm guide rail is provided with the rotary arm governor motor, also is provided with angle scale on the said revolving force arm axle.Can be clipped in the position on the rotary arm pull bar through regulating the rotary arm anchor clamps; Regulate the position of rotary arm base on the rotary arm guide rail simultaneously; Regulate bending radius; Thereby realize the processing of the pipe of different size, and in the course of work, can show the flexibility of bend pipe through the angle of angle scale.
In order to increase the scope of application of this device, the pipe of processing different tube diameters, said guide holder are provided with the adjusting rod of adjusting guide roller spacing.The spacing of regulating guide roller through adjusting rod compresses the different tube diameters pipe.
In order further to strengthen the stability of guide roller guiding, said guide roller is provided with two pairs.
In order to strengthen the stability that the hydraulic pressure push pedal promotes the pipe process; Said hydraulic pressure push pedal comprises the propelling oil cylinder; The end of said propelling oil cylinder piston bar is connected with cuts somebody's hair, and the guide rail that feed flow presses push pedal to slide also is installed on the said support, and said propelling oil cylinder is provided with two; Said two advance the oil cylinder piston bar all to be connected on said the cutting somebody's hair, and said center of cutting somebody's hair is provided with rear jig.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the left view of Fig. 1.
Fig. 4 is an induction heating circle structural representation of the present invention.
Fig. 5 is that the A-A of Fig. 4 is to cutaway view.
Fig. 6 is bend pipe bending area sketch map among the present invention.
Fig. 7 is a working state schematic representation of the present invention.
Wherein, 1 support, 2 advance oil cylinder, and 3 cut somebody's hair, 4 rear jigs, 5 frame guide rails; 6 guide holders, 6a guide roller, 6b adjusting rod, 7 pipes, 8 induction heating circles, 8a hole for water spraying; The 8b cooling water channel, 8c water inlet pipe, 9 front jigs, 10 rotary arm governor motors, 11 rotary arm guide rails; 12 rotary arm bases, 13 revolving force arm axles, 14 angle scales, 15 rotary arm anchor clamps, 16 rotary arm pull bars.
The specific embodiment
A kind of centreless bending machine shown in Fig. 1-7; Comprise the hydraulic pressure push pedal, swan neck system, the induction heating circle 8 that are fixedly mounted on the support 1, the hydraulic pressure push pedal comprises that two advance oil cylinder 2, and the end of propelling oil cylinder 2 piston rods is connected with cuts somebody's hair 3; 3 centers of cutting somebody's hair are installed with rear jig 4; Also be equipped with on the support 1 and supply to cut somebody's hair 3 frame guide rails 5 and pipe guide holder 6 that slide, the adjusting rod 6b that two couples of guide roller 6a is installed on the guide holder 6 and regulates guide roller 6a spacing, swan neck system comprises the revolving force arm axle 13 that is installed on the rotary arm base 12; Revolving force arm axle 13 is set with rotary arm anchor clamps 15 and angle scale 14; Clamped rotary arm pull bar 16 on the rotary arm anchor clamps 15, the end of rotary arm pull bar 16 is installed with front jig 9, and rotary arm base 12 slidably is installed on the rotary arm guide rail 11; The end of rotary arm guide rail 11 is provided with rotary arm governor motor 10; Front jig 9, induction heating circle 8, rear jig 4 coaxial settings, induction heating circle 8 evenly offer some hole for water spraying 8a on the medial angle of board dorsad, offer the annular cooling water road 8b that is communicated with hole for water spraying 8a in the induction heating circle 8; The top of cooling water channel 8b is provided with water inlet pipe 8c, and the cooling section of spraying water on the pipe 7 is arranged on 7 of pipes and upward has in hole for water spraying 8a end face 20cm ~ 50cm scope apart from induction heating circle 8.
Before the work of the present invention, earlier pipe 7 to be processed is installed on the support 1, an end of pipe 7 is fixed on the rear jig 4; The middle part of pipe 7 is installed between the guide roller 6a, and the other end of pipe 7 passes induction heating circle 8 and is fixed on the front jig 9, and rotary arm pull bar 16 is in 0 ° of position at this moment; During work, start induction heating circle 8 and advance oil cylinder 2, advance oil cylinder 2 to promote pipe 7 and slowly move forward; The pipe 7 of 8 pairs of processes of induction heating circle heats, and is fixed on pipe 7 on the front jig 9 along with the rotation of revolving force arm axle 13, and 7 sections of pipes that drive firm once heated carry out bending in induction heating circle 8 exits; The cooling of under the slow promotion that advances oil cylinder 2, spraying water of pipe 7 after the bending, the intensity enhancing of water spray cooling back pipe 7 is along with the slow promotion of propelling oil cylinder 2; Realize the slow moulding of pipe 7, after bending reaches corresponding specification, shutdown system; Take off the bend pipe that machines; Forward rotary arm pull bar 16 to 0 ° of position, carry out the processing of next pipe 7 again, whole bend fixing process can be divided into following three steps: eddy-current heating → thermal flexure → cooling and shaping; In the process, can realize the precision control of angle of bend through being sleeved on the angle of angle scale 14 real-time monitoring pipes 7 bendings on the revolving force arm axle 13; If when needing the pipe 7 of processing different size; Can be through regulating the position that rotary arm anchor clamps 15 are clipped on the rotary arm pull bar 16; Regulate the position of rotary arm base 12 on rotary arm guide rail 11 simultaneously, regulate bending radius, thereby realize the processing of the pipe 7 of obstructed specification.
The present invention is not limited to the foregoing description; On the basis of technical scheme disclosed by the invention; Those skilled in the art is according to disclosed technology contents; Do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection scope of the present invention.
Claims (8)
1. centreless bending machine; Comprise the hydraulic pressure push pedal, swan neck system, the induction heating circle that are fixedly mounted on the support, be installed with rear jig in the said hydraulic pressure push pedal, the pipe guide holder also is installed on the said support; On the said pipe guide holder at least one pair of guide roller is installed; Said swan neck system comprises the revolving force arm axle that is installed on the rotary arm base, and said rotary arm axle sleeve is equipped with the rotary arm anchor clamps, has clamped the rotary arm pull bar on the said rotary arm anchor clamps; The end of rotary arm pull bar is installed with front jig; Said front jig, induction heating circle, the coaxial setting of rear jig is characterized in that, said induction heating circle offers some hole for water sprayings on the medial angle of board dorsad.
2. a kind of centreless bending machine according to claim 1; It is characterized in that; Said hole for water spraying is distributed on the induction heating circle medial angle ringwise, offers the annular cooling water road that is communicated with hole for water spraying in the said induction heating circle, and the top of said cooling water channel is provided with water inlet pipe.
3. a kind of centreless bending machine according to claim 1 and 2 is characterized in that, the water spray cooling section is arranged on the pipe face and has in hole for water spraying end face 20cm ~ 50cm scope apart from induction heating circle on the said pipe.
4. a kind of centreless bending machine according to claim 1 and 2; It is characterized in that; Said rotary arm base slidably is installed on the rotary arm guide rail, and the end of rotary arm guide rail is provided with the rotary arm governor motor, also is provided with angle scale on the said revolving force arm axle.
5. a kind of centreless bending machine according to claim 1 and 2 is characterized in that, said guide holder is provided with the adjusting rod of regulating the guide roller spacing.
6. a kind of centreless bending machine according to claim 1 and 2 is characterized in that said guide roller is provided with two pairs.
7. a kind of centreless bending machine according to claim 1 and 2 is characterized in that said hydraulic pressure push pedal comprises the propelling oil cylinder, and the end of said propelling oil cylinder piston bar is connected with cuts somebody's hair, and the guide rail that feed flow presses push pedal to slide also is installed on the said support.
8. a kind of centreless bending machine according to claim 7 is characterized in that said propelling oil cylinder is provided with two, and said two advance the oil cylinder piston bar all to be connected on said the cutting somebody's hair, and said center of cutting somebody's hair is provided with rear jig.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210276646.3A CN102784821B (en) | 2012-08-06 | 2012-08-06 | Coreless pipe-bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210276646.3A CN102784821B (en) | 2012-08-06 | 2012-08-06 | Coreless pipe-bending machine |
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| CN102784821A true CN102784821A (en) | 2012-11-21 |
| CN102784821B CN102784821B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210276646.3A Active CN102784821B (en) | 2012-08-06 | 2012-08-06 | Coreless pipe-bending machine |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447360A (en) * | 2013-08-26 | 2013-12-18 | 河南省驰源石油化工机械有限公司 | Device for producing arc-shaped steel pipes |
| CN103801600A (en) * | 2014-02-18 | 2014-05-21 | 常熟市高压容器制造有限公司 | Continuous push type medium frequency heating bent pipe machining device and machining method |
| CN104259272A (en) * | 2014-08-11 | 2015-01-07 | 西北工业大学 | Induction heating stretch-bending forming device for aircraft sectional materials |
| CN104324992A (en) * | 2014-10-21 | 2015-02-04 | 广西来宾东糖迁江有限公司 | Multipurpose pipe bender |
| CN104438495A (en) * | 2013-09-24 | 2015-03-25 | 中石化胜利油建工程有限公司 | One-step method hot-bending bend device and process |
| CN104441596A (en) * | 2014-11-28 | 2015-03-25 | 安徽雄峰实业有限公司 | Electromagnetic heating plastic profile bending device |
| CN104527039A (en) * | 2014-11-28 | 2015-04-22 | 安徽雄峰实业有限公司 | Plastic section bar folding apparatus |
| CN106391786A (en) * | 2016-11-08 | 2017-02-15 | 中国能源建设集团天津电力建设有限公司 | Pipe bending device for sliding table type pipe bending machine and using method of pipe bending device |
| CN106734421A (en) * | 2016-12-13 | 2017-05-31 | 重庆博钻太阳能灯具有限公司 | Lamp stand processing unit (plant) |
| CN107617692A (en) * | 2017-06-09 | 2018-01-23 | 安徽宏远机械制造有限公司 | A kind of auxiliary positioning device for machining |
| CN107983808A (en) * | 2017-11-29 | 2018-05-04 | 无锡市汇鼎金属制管有限公司 | A kind of metal tube processing molding machine |
| CN109396231A (en) * | 2018-11-15 | 2019-03-01 | 太原科技大学 | A kind of deep camber centreless magnesium alloy pipe bending forming technique |
| CN110586716A (en) * | 2019-10-10 | 2019-12-20 | 山东建筑大学 | Telescopic rocker arm for multi-arc pipe hot bending forming, pipe bending equipment and pipe bending process |
| CN110695160A (en) * | 2019-11-11 | 2020-01-17 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Small-curvature-radius induction heating pipe bender |
| CN110947807A (en) * | 2019-12-19 | 2020-04-03 | 马鞍山市兴隆铸造有限公司 | Elbow pipe machining device convenient to use |
| CN111167898A (en) * | 2020-01-17 | 2020-05-19 | 南昌航空大学 | Pipe numerical control winding and pushing forming method and device |
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| JPH01154825A (en) * | 1987-12-14 | 1989-06-16 | Ishikawajima Harima Heavy Ind Co Ltd | Bending method for stainless steel pipe |
| US6192728B1 (en) * | 2000-05-30 | 2001-02-27 | Yin Lin Machine Industrial Co., Ltd | Pipe bending machine accurately controlling bent angles of pipes |
| JP2010131649A (en) * | 2008-12-05 | 2010-06-17 | Kogakuin Univ | Apparatus and method for bending steel tube |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447360A (en) * | 2013-08-26 | 2013-12-18 | 河南省驰源石油化工机械有限公司 | Device for producing arc-shaped steel pipes |
| CN104438495A (en) * | 2013-09-24 | 2015-03-25 | 中石化胜利油建工程有限公司 | One-step method hot-bending bend device and process |
| CN103801600A (en) * | 2014-02-18 | 2014-05-21 | 常熟市高压容器制造有限公司 | Continuous push type medium frequency heating bent pipe machining device and machining method |
| CN104259272A (en) * | 2014-08-11 | 2015-01-07 | 西北工业大学 | Induction heating stretch-bending forming device for aircraft sectional materials |
| CN104259272B (en) * | 2014-08-11 | 2016-04-27 | 西北工业大学 | A kind of eddy-current heating stretch wrap forming device for aircraft section bar |
| CN104324992A (en) * | 2014-10-21 | 2015-02-04 | 广西来宾东糖迁江有限公司 | Multipurpose pipe bender |
| CN104441596A (en) * | 2014-11-28 | 2015-03-25 | 安徽雄峰实业有限公司 | Electromagnetic heating plastic profile bending device |
| CN104527039A (en) * | 2014-11-28 | 2015-04-22 | 安徽雄峰实业有限公司 | Plastic section bar folding apparatus |
| CN106391786A (en) * | 2016-11-08 | 2017-02-15 | 中国能源建设集团天津电力建设有限公司 | Pipe bending device for sliding table type pipe bending machine and using method of pipe bending device |
| CN106734421A (en) * | 2016-12-13 | 2017-05-31 | 重庆博钻太阳能灯具有限公司 | Lamp stand processing unit (plant) |
| CN106734421B (en) * | 2016-12-13 | 2018-03-23 | 重庆博钻太阳能灯具有限公司 | Lamp stand processing unit (plant) |
| CN107617692A (en) * | 2017-06-09 | 2018-01-23 | 安徽宏远机械制造有限公司 | A kind of auxiliary positioning device for machining |
| CN107983808A (en) * | 2017-11-29 | 2018-05-04 | 无锡市汇鼎金属制管有限公司 | A kind of metal tube processing molding machine |
| CN109396231A (en) * | 2018-11-15 | 2019-03-01 | 太原科技大学 | A kind of deep camber centreless magnesium alloy pipe bending forming technique |
| CN110586716A (en) * | 2019-10-10 | 2019-12-20 | 山东建筑大学 | Telescopic rocker arm for multi-arc pipe hot bending forming, pipe bending equipment and pipe bending process |
| CN110586716B (en) * | 2019-10-10 | 2021-04-23 | 山东建筑大学 | Telescopic rocker arm for multi-arc pipe hot bending forming, pipe bending equipment and pipe bending process |
| CN110695160A (en) * | 2019-11-11 | 2020-01-17 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Small-curvature-radius induction heating pipe bender |
| CN110947807A (en) * | 2019-12-19 | 2020-04-03 | 马鞍山市兴隆铸造有限公司 | Elbow pipe machining device convenient to use |
| CN111167898A (en) * | 2020-01-17 | 2020-05-19 | 南昌航空大学 | Pipe numerical control winding and pushing forming method and device |
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| CN102784821B (en) | 2015-03-25 |
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