CN102581092A - Inner core die for bent pipe - Google Patents

Inner core die for bent pipe Download PDF

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Publication number
CN102581092A
CN102581092A CN2012100471674A CN201210047167A CN102581092A CN 102581092 A CN102581092 A CN 102581092A CN 2012100471674 A CN2012100471674 A CN 2012100471674A CN 201210047167 A CN201210047167 A CN 201210047167A CN 102581092 A CN102581092 A CN 102581092A
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CN
China
Prior art keywords
ball
supporting disk
spring
core
hole
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Granted
Application number
CN2012100471674A
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Chinese (zh)
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CN102581092B (en
Inventor
陈少忠
张吉华
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The Central-South heavy industry Co., Ltd in Jiangyin
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Jiangyin Zhongnan Heavy Industry Furnishment Co Ltd
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Publication date
Application filed by Jiangyin Zhongnan Heavy Industry Furnishment Co Ltd filed Critical Jiangyin Zhongnan Heavy Industry Furnishment Co Ltd
Priority to CN2012100471674A priority Critical patent/CN102581092B/en
Publication of CN102581092A publication Critical patent/CN102581092A/en
Application granted granted Critical
Publication of CN102581092B publication Critical patent/CN102581092B/en
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Abstract

The invention relates to an inner core die for a bent pipe. The inner core die is characterized by comprising a supporting disk, a ball arc disk, a pull ball, rotation columns, an upper pin shaft, lower pin shafts, an upper spring and a lower spring, wherein a cambered groove is formed on each of two sides of the supporting disk; a plurality of grooves are formed on the circumferential surface of the supporting disk at equal intervals; the pull ball comprises a ball core and a connecting rod; one end of the connecting rod is connected with the ball core; the ball core of the pull ball is arranged in the cambered grooves on the supporting disk; the ball arc disk is covered on the outer sides of the cambered grooves on the supporting disk; each rotation column is arranged in each of the grooves on the circumferential surface of the supporting disk; a concave hole is formed above the rotation columns; the upper spring is arranged in the concave hole; the upper pin shaft is arranged in the concave hole on the outer side of the upper spring; a through hole vertical to the concave hole is formed below the rotation column; the lower spring is arranged in the through hole; and each lower pin shaft is arranged in each of through holes at two ends of the lower spring. The inner core die has the advantages of uniform supporting force, simple and quick demolding procedure and short demolding time, and the labor intensity of workers can be reduced.

Description

Bend pipe is used interior core
Technical field
The present invention relates to a kind of interior core, relate in particular to a kind of bend pipe and use interior core.
Background technology
At present domestic when producing bend pipe, the general core that adopts comprises core print and core bar, and when producing bend pipe, the blank pipe is under the promotion of hydraulic jack, and the blank pipe is along the core thick stick, and the angle of bend of core print carries out hole enlargement, and bending forms the blank of elbow gradually; But (for example: DN800-1400 wall thickness S >=70mm) is difficulty just when heavy construction needs the elbow of high temperature resistant, high pressure of heavy caliber, heavy wall; Because need to enlarge the blank caliber, the control temperature is 880 ℃~1020 ℃, under this temperature; The tensile strength of core print material descends rapidly; When pushing wall thickness>70mm elbow, the phenomenon that the place of link of core print and core thick stick is torn often takes place, cause stop production to overhaul; Need another kind of method production, promptly the hot blank pipe of elder generation is heated to 900~1000 ℃ when producing bend pipe for this reason; Take out then in the mould that is placed on the head that bends, blank is pressed into elbow by the Pneumatic hydraulic oil cylinder; For avoiding tube wall to subside, blank pipe domestic demand is placed heavy supporting mould.Because supporting mould will be passed out while hot, therefore, " demoulding program " relies on the operator to beat, vibrate with iron rod, wooden stick fully, the some minutes time, inner mold and elbow thrown off; Its support force is inhomogeneous, and demoulding program is loaded down with trivial details, and labor strength is high, and demould time is long, and production efficiency is low, and the elbow inner surface is often wounded, and influences product quality.
Summary of the invention
To above-mentioned shortcoming, the object of the invention be to provide a kind of support force evenly, demoulding program simple and clear quick, can alleviate labor strength, the short bend pipe of demould time is used interior core.
Technology contents of the present invention is: a kind of bend pipe is used interior core, it is characterized in that it comprises supporting disk, ball arc dish, pulling force ball, Rotational Cylindrical, upper pin, lower bearing pin, upper spring and lower spring; Its both sides at supporting disk respectively are provided with an arc groove, and equidistance is provided with some grooves on the periphery of supporting disk; Top at ball arc dish is provided with a perforation; The pulling force bag is drawn together ball core and connecting rod, and connecting rod one end is connected with the ball core; The ball core of pulling force ball is installed in the arc groove of supporting disk, and ball arc disk cover is contained in the arc groove outside of supporting disk, and the connecting rod of pulling force ball passes from the perforation of ball arc dish; Respectively be provided with a Rotational Cylindrical in the groove on the periphery of supporting disk; Above Rotational Cylindrical, be provided with a shrinkage pool; In shrinkage pool, be provided with upper spring, upper pin is located in the shrinkage pool of upper spring outboard end, below Rotational Cylindrical, is provided with a through hole vertical with shrinkage pool; In through hole, be provided with lower spring, in the through hole at lower spring two ends, respectively be provided with a lower bearing pin.
The advantage that is compared with prior art had of the present invention is: after being placed on the present invention in the elbow material after the heating, when by the Pneumatic hydraulic oil cylinder blank being pressed into elbow, the support force of supporting disk is even; When taking out this bend pipe with interior core, only need that it is pulled out elbow and get final product, convenient and swift; Can alleviate the labor strength height thus, demould time is short, and the production efficiency of bend pipe is improved; Since need not be to beaing, the elbow inner surface is difficult for wounding, and product quality is improved.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is a use sketch map of the present invention.
Specific embodiment
A kind of bend pipe as depicted in figs. 1 and 2 is used interior core, it is characterized in that it comprises supporting disk 1, ball arc dish 2, pulling force ball 3, Rotational Cylindrical 4, upper pin 5, lower bearing pin 6, upper spring 7 and lower spring 8; Its both sides at supporting disk 1 respectively are provided with an arc groove 1.1, and equidistance is provided with some grooves 1.2 on the periphery of supporting disk; Be provided with a perforation 2.1 at the top of ball arc dish 2; Pulling force ball 3 comprises ball core 3.1 and connecting rod 3.2, and connecting rod 3.2 1 ends are connected with ball core 3.1; The ball core 3.1 of pulling force ball 3 is installed in the arc groove 1.1 of supporting disk 1, and ball arc disk cover 2 is contained in arc groove 1.1 outsides of supporting disk 1, and the connecting rod 3.2 of pulling force ball 3 passes from the perforation 2.1 of ball arc dish 2; Respectively be provided with a Rotational Cylindrical 4 in the groove 1.2 on the periphery of supporting disk 1; Above Rotational Cylindrical 4, be provided with a shrinkage pool 4.1; In shrinkage pool 4.1, be provided with upper spring 7; Upper pin 8 is located in the shrinkage pool 4.1 of upper spring 7 outboard ends; Below Rotational Cylindrical 4, be provided with a through hole 4.2 vertical, in through hole 4.2, be provided with lower spring 8, in the through hole 4.2 at lower spring 8 two ends, respectively be provided with a lower bearing pin 6 with shrinkage pool 4.1.
Operation principle of the present invention does; As shown in Figure 3ly after being interconnected by connecting rod 3.2 through attaching nut 10 with interior core 9, several bend pipes put into elbow material; After treating elbow material is pressed into bend pipe 11, should go out bend pipe with the inner core mode pulling by some bend pipes through traction.

Claims (1)

1. a bend pipe is used interior core, it is characterized in that it comprises supporting disk (1), ball arc dish (2), pulling force ball (3), Rotational Cylindrical (4), upper pin (5), lower bearing pin (6), upper spring (7) and lower spring (8); Its both sides at supporting disk (1) respectively are provided with an arc groove (1.1), and equidistance is provided with some grooves (1.2) on the periphery of supporting disk; Be provided with a perforation (2.1) at the top of ball arc dish (2); Pulling force ball (3) comprises ball core (3.1) and connecting rod (3.2), and connecting rod (3.2) one ends are connected with ball core (3.1); The ball core (3.1) of pulling force ball (3) is installed in the arc groove (1.1) of supporting disk (1), and ball arc disk cover (2) is contained in arc groove (1.1) outside of supporting disk (1), and the connecting rod (3.2) of pulling force ball (3) passes from the perforation (2.1) of ball arc dish (2); Respectively be provided with a Rotational Cylindrical (4) in the groove on the periphery of supporting disk (1) (1.2); Be provided with a shrinkage pool (4.1) in Rotational Cylindrical (4) top; In shrinkage pool (4.1), be provided with upper spring (7); Upper pin (8) is located in the shrinkage pool (4.1) of upper spring (7) outboard end; Be provided with a through hole (4.2) vertical in Rotational Cylindrical (4) below, in through hole (4.2), be provided with lower spring (8), in the through hole (4.2) at lower spring (8) two ends, respectively be provided with a lower bearing pin (6) with shrinkage pool (4.1).
CN2012100471674A 2012-02-28 2012-02-28 Inner core die for bent pipe Active CN102581092B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012100471674A CN102581092B (en) 2012-02-28 2012-02-28 Inner core die for bent pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012100471674A CN102581092B (en) 2012-02-28 2012-02-28 Inner core die for bent pipe

Publications (2)

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CN102581092A true CN102581092A (en) 2012-07-18
CN102581092B CN102581092B (en) 2013-12-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104553397A (en) * 2014-11-28 2015-04-29 芜湖贝斯特新能源开发有限公司 Stamping mold and stamping device
CN110560530A (en) * 2019-10-12 2019-12-13 合肥工业大学 Variable-diameter crease-resistant core rod for bent pipe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2778402A (en) * 1951-12-18 1957-01-22 Western Electric Co Flexible mandrels for bending wave guides
US4123930A (en) * 1977-03-29 1978-11-07 Teledyne Industries, Inc. Mandrel for bending tubes
CN101367099A (en) * 2007-08-14 2009-02-18 西北工业大学 Flexible bend pipe core mould
JP2009113098A (en) * 2007-11-08 2009-05-28 Comco Corp Mandrel for bending
CN202021249U (en) * 2010-12-19 2011-11-02 富奥汽车零部件股份有限公司 Hydraulically-driven core-pulling punch-forming device for pipes
CN202539305U (en) * 2012-02-28 2012-11-21 江阴中南重工股份有限公司 Internal mandrel for bent pipe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2778402A (en) * 1951-12-18 1957-01-22 Western Electric Co Flexible mandrels for bending wave guides
US4123930A (en) * 1977-03-29 1978-11-07 Teledyne Industries, Inc. Mandrel for bending tubes
CN101367099A (en) * 2007-08-14 2009-02-18 西北工业大学 Flexible bend pipe core mould
JP2009113098A (en) * 2007-11-08 2009-05-28 Comco Corp Mandrel for bending
CN202021249U (en) * 2010-12-19 2011-11-02 富奥汽车零部件股份有限公司 Hydraulically-driven core-pulling punch-forming device for pipes
CN202539305U (en) * 2012-02-28 2012-11-21 江阴中南重工股份有限公司 Internal mandrel for bent pipe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
申世军等: "铝合金大口径薄壁管数控弯曲实验研究", 《塑性工程学报》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104553397A (en) * 2014-11-28 2015-04-29 芜湖贝斯特新能源开发有限公司 Stamping mold and stamping device
CN110560530A (en) * 2019-10-12 2019-12-13 合肥工业大学 Variable-diameter crease-resistant core rod for bent pipe
CN110560530B (en) * 2019-10-12 2020-12-22 合肥工业大学 Variable-diameter crease-resistant core rod for bent pipe

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Effective date of registration: 20160826

Address after: Changshan town 214429 high tech Industrial Development Zone, Jiangsu city of Jiangyin Province as Bridge No. 3 in the South South Group

Patentee after: The Central-South heavy industry Co., Ltd in Jiangyin

Address before: 214437 No. 788 Jin Shan Road, Binjiang Development Zone, Wuxi, Jiangsu, Jiangyin

Patentee before: Jiangyin Zhongnan Heavy Industry Furnishment Co., Ltd.