CN102601187A - Soft mandrel inserting and extracting device and inserting and extracting method - Google Patents
Soft mandrel inserting and extracting device and inserting and extracting method Download PDFInfo
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- CN102601187A CN102601187A CN201210066052XA CN201210066052A CN102601187A CN 102601187 A CN102601187 A CN 102601187A CN 201210066052X A CN201210066052X A CN 201210066052XA CN 201210066052 A CN201210066052 A CN 201210066052A CN 102601187 A CN102601187 A CN 102601187A
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Abstract
The invention provides a soft mandrel inserting and extracting device and an inserting and extracting method, which are used for performing cold cored bending of a metal pipe fitting. The inner wall of the pipe fitting cannot be damaged by means of pulling when a soft mandrel is extracted from a bent pipe, and cold cored bending of the metal pipe fitting and inserting and extracting of the soft mandrel are continuously performed, so that operating efficiency is high. The device comprises a base plate and a hydraulic cylinder, the outer end of a siding piston rod of the hydraulic cylinder is connected with the middle of a transversely placed connecting shaft, a platy pulling block is arranged in the front of the middle of the connecting shaft and connected with an exposed end plate connecting part of the mandrel, and the front end of the pulling block is abutted to the exposed end of the mandrel. Rolling bearings are arranged at two ends of the connecting shaft, a pair of guide plates are symmetrically arranged on the base plate, the guide plate on each side is provided with a guide groove, the width of each guide groove is matched with the outer diameter of each rolling bearing, the guide grooves are equivalent in width and are as same as or similar to the axis curve of the bent metal pipe fitting in shape and in direction, the connecting shaft is placed on the guide grooves through the rolling bearings, and the outer end of a hydraulic cylinder body is placed on a support through a hydraulic cylinder rotating shaft, and can rotate around the rotating shaft.
Description
Technical field
The present invention relates to metal tube cold conditions brake forming technical field, a kind of soft plug plug-in and pull-off device and metal tube cold conditions that being specifically related to be used for the metal tube cold conditions has chip bending to add man-hour have chip bending to add the plug plug method in man-hour.
Background technology
Modern industry extensively exists the metal tube cold conditions that the chip bending process requirements is arranged; Plug of a great variety; Can be divided into rigid plug and soft plug; In metal tube, insert soft plug when crooked and can guarantee bending quality effectively, soft plug can be formed by the sheet metal piece serial connection that soft bar will have a smooth edge; General in metal tube, insert soft plug earlier, after place bending mould to carry out bending metal tube, again with hydraulic jack with extracting in the soft plug bend pipe.But because the sliding stopper rod of oil cylinder is only made linearly operating; When soft plug being extracted from bend pipe with hydraulic jack; Tend to occur pipe fitting inner wall and pull, even pipe fitting outer wall generation depressed deformation, especially even more serious for shape tube situation such as some elliptical tubes, rectangular tubes.In addition, prior art is by manual or accomplish with aid soft plug is inserted the action in the metal tube, again with hydraulic jack with extracting in the soft plug bend pipe, the action poor continuity, operating efficiency is low.
The present invention solves the problems referred to above just.
Summary of the invention
Technical problem to be solved by this invention is to the above-mentioned state of the art; Provide a kind of soft plug plug-in and pull-off device and metal tube cold conditions that is used for the metal tube cold conditions and has chip bending to add man-hour to have chip bending to add the plug plug method in man-hour; Assurance is extracted Shi Buhui with soft plug and is pulled pipe fitting inner wall from bend pipe; And make the metal tube cold conditions have chip bending processing and soft plug to insert with extracting continuously to carry out that operating efficiency is high.The present invention solves the problems of the technologies described above the technical scheme that is adopted:
Soft plug plug-in and pull-off device; It is preceding with after soft plug insertion metal tube and the brake forming soft plug being extracted from the crooked port of metal tube to be used for the brake forming of metal tube cold conditions; Said device comprises by soft bar will have the soft plug that the sheet metal piece serial connection of smooth edge forms; The outer end of said soft plug exposes to the end plate of the metal mouth of pipe after inserting, and is provided with a connection piece; Said device comprises base plate; Vertically be shelved on the hydraulic jack on the base plate as what extract power source; It is characterized in that the connecting axle middle part that laterally place the sliding stopper rod of the oil cylinder of said hydraulic jack outer end and is fixedly connected, front side, said connecting axle middle part is provided with tabular guiding piece; Said guiding piece is connected with the end plate connector that exposes of said plug, and the end of exposing of the said plug of its front end offsets; Said connecting axle two ends are provided with rolling bearing; On the base plate of place, the vertical both sides of the sliding stopper rod of said oil cylinder, be symmetrically arranged with a pair of guide plate; Said every flipper guide is provided with the guide groove that groove width and said rolling bearing external diameter match; Said guide groove is by same or similar shape of axle center curve and the wide setting of direction after the said metal tube bending; And the axle center length of curve of the length of said guide groove after greater than the metal tube bending, said connecting axle is shelved on through the rolling bearing that is arranged on its two ends on the guide groove of said guide plate, and said hydraulic jack cylinder body outer end is shelved on the cylinder bracket that is positioned at the frame upper spider outside through the oil cylinder rotating shaft; Said oil cylinder rotating shaft crosswise fixed is arranged on the said cylinder bracket, makes said hydraulic jack and sliding stopper rod thereof to rotate around the oil cylinder rotating shaft.
Said plug is divided into up and down by the high strength ropy, and two sheet metal piece serial connections that will constitute plug form; Said ropy forms " U " shape circle outside the plug end plate; Expose the end plate connector as said plug; Said tabular guiding piece is provided with connecting hole, and connector " U " shape circle passes this connecting hole.
Said guide plate directly is fixedly installed on the said base plate.
Be close to a pair of guide plate fixed head that is used for fixing said guide plate of arranged outside of said guide plate; Said guide plate fixed head is fixed on the said base plate; Nearly its two side position in said guide plate below is provided with installing hole; The relevant position of said guide plate fixed head is provided with groove or the rotating shaft installing hole that is used to regulate said guide plate position, and said guide plate leaves base plate one determining deviation and is mounted on the guide plate fixed head with bolt.
Two relevant positions of said guide plate fixed head are provided with the straight trough that is used to regulate said guide plate position, are connected with bolt between said guide plate and the guide plate fixed head.
One of them of two relevant positions of said guide plate fixed head is provided with the rotating shaft installing hole, replaces bolt as the connector between guide plate and the guide plate fixed head with a rotating shaft; Two relevant positions of said guide plate fixed head wherein two be provided for regulating said guide plate position arc groove.
Said arc groove is the center of circle with rotating shaft installing hole center, is radius with arc groove and the two center distance of rotating shaft installing hole.
The metal tube cold conditions has chip bending to add the plug plug method in man-hour; It is characterized in that, use, said plug plug-in and pull-off device is installed in by the bending mould like each described soft plug plug-in and pull-off device of claim 1 to 7; The metal tube that need are crooked is put into bending mould; The primer fluid compressing cylinder makes the sliding stopper rod elongation of oil cylinder, promotes said connecting axle, guiding piece along guide groove forward, and then is promoted in the said soft plug insertion metal tube by the guiding piece that end plate offsets that exposes of its front end and plug; After treating that crooked mould is accomplished the pipe fitting brake forming; The primer fluid compressing cylinder makes the sliding stopper rod withdrawal of oil cylinder; Drive said connecting axle, guiding piece backward, and then expose the end plate connector by plug and drive said soft plug backward, said plug is extracted in metal winding pipe along guide groove along guide groove.
The sliding stopper rod traverse of oil cylinder is set, make that said plug is pulled out after, its inner with smooth edge still is shelved on bending mould counterdie port.
The metal tube cold conditions that is used for provided by the present invention has chip bending to add the soft plug plug-in and pull-off device and the plug plug method in man-hour, guarantees that soft plug is extracted Shi Buhui from bend pipe pull pipe fitting inner wall, and bending quality is high, the plug long service life; And make the metal tube cold conditions have chip bending processing and soft plug to insert with extracting continuously to carry out that operating efficiency is high, and the cold conditions that is particularly useful for pipe, elliptical tube has chip bending processing, and the cold conditions that also can be used for square pipe fitting has chip bending processing.In addition, owing to the guide plate position of soft plug plug-in and pull-off device provided by the present invention can suitably be adjusted, also stronger for the specification adaptability of metal tube.
Description of drawings
Fig. 1 is an institute of the present invention suitable metal pipe fitting sketch map;
Fig. 2 is a crooked back metal tube sketch map;
Fig. 3 is the soft plug sketch map of Fig. 2 that the present invention adopted;
Fig. 4 is that soft plug inserts the metal tube view;
Fig. 5 for the metal tube bending of inserting soft plug after sketch map;
Fig. 6 is the soft plug plug-in and pull-off device of a present invention front view;
Fig. 7 is the soft plug plug-in and pull-off device of a present invention vertical view;
Fig. 8 inserts view before the soft plug bending for metal tube places on the bending mould by the soft plug plug-in and pull-off device of the present invention.
Fig. 9 is for to extract soft plug view by the soft plug plug-in and pull-off device of the present invention.
The specific embodiment
The present invention is used for metal tube as shown in Figure 11 is bent to as shown in Figure 2, and metal tube 1 can be pipe, elliptical tube, also can be rectangular tube; In order to guarantee the brake forming quality; In metal tube 1, insert soft plug 2 before crooked, soft plug 2 is formed by the sheet metal piece serial connection that soft bar will have smooth edge, can be arbitrarily along its soft bar distortion; Its outer end exposes to the end plate 3 of the metal mouth of pipe after inserting, and is provided with a connection piece 4.As shown in Figure 3 is a kind of soft plug 2 that relatively is fit to apparatus of the present invention; This soft plug 2 is divided into up and down by the high strength ropy, and two sheet metal piece serial connections that will constitute plug form; Ropy forms " U " shape circle outside the plug end plate; Expose end plate connector 4 as said plug, the high strength ropy can be selected steel wire rope for use, also can select nylon rope or other high strength cord for use.When inserting soft plug 2 in the metal tube 1, end plate 3 and connector 4 expose to the metal mouth of pipe, and be as shown in Figure 4; During metal tube 1 bending, soft plug 2 is followed its distortion, and is as shown in Figure 5.
Like Fig. 6 to soft plug plug-in and pull-off device shown in Figure 9; It is preceding with after soft plug 2 insertion metal tubes 1 and the brake forming soft plug 2 being extracted from the crooked port of metal tube 1 to be used for metal tube 1 cold conditions brake forming; This device comprises aforesaid soft plug 2, base plate 5, vertically is shelved on the hydraulic jack 6 on the base plate 5 as what extract power source; Connecting axle 8 middle parts that laterally place the sliding stopper rod of the oil cylinder of hydraulic jack 67 outer ends and are fixedly connected; Front side, connecting axle 8 middle part is provided with tabular guiding piece 9; Guiding piece 9 is connected with end plate 3 connectors 4 that expose of plug 2, and connection can be adopted: on the tabular guiding piece 9 connecting hole 15 is set, connector 4 " U " shape circle passes this connecting hole 15; And the end plate 3 that exposes of its front end and plug 2 offsets; Connecting axle end plate 8 two ends are provided with rolling bearing 10; On the base plate 5 of place, oil cylinder sliding stopper rod 7 vertical both sides, be symmetrically arranged with a pair of guide plate 11; Every flipper guide 11 is provided with the guide groove 12 that groove width and said rolling bearing 10 external diameters match; Guide groove 12 is pressed same or similar shape of axle center curve and the wide setting of direction after 1 bending of metal pipe fitting; And the axle center length of curve of the length of guide groove 12 after greater than metal tube 1 bending, connecting axle 8 is shelved on the guide groove of guide plate through the rolling bearing 10 that is arranged on its two ends, and hydraulic jack 6 cylinder body outer ends are shelved on the cylinder bracket 14 that is positioned at base plate 5 outsides through oil cylinder rotating shaft 13; Oil cylinder rotating shaft 13 crosswise fixed are arranged on the cylinder bracket 14, make hydraulic jack 6 and sliding stopper rod 7 thereof to rotate around oil cylinder rotating shaft 13.
About the setting of guide plate 11, can form a plurality of plans of establishment.
Scheme 1: guide plate 11 directly is fixedly installed on the base plate 5.This scheme adapts to the metal tube bending machining of single specification.
Scheme 2: a pair of guide plate fixed head 16 that is used for fixing guide plate 11 of arranged outside that is close to guide plate 11; Guide plate fixed head 16 is fixed on the base plate 5; Nearly its two side position in guide plate 11 belows is provided with installing hole; The relevant position of guide plate fixed head 16 is provided with groove or the rotating shaft installing hole that is used to regulate guide plate 11 positions, and guide plate 11 leaves base plate 5 one determining deviations and is mounted on the guide plate fixed head 16 with bolt.
Scheme 2-1: two relevant positions of guide plate fixed head 16 are provided with the straight trough that is used to regulate said guide plate 11 positions, are connected with bolt between guide plate and the guide plate fixed head 16.
Scheme 2-2: one of them of two relevant positions of guide plate fixed head 16 is provided with rotating shaft installing hole 17, replaces bolt as the connector between guide plate 11 and the guide plate fixed head 16 with a rotating shaft; Two relevant positions of guide plate fixed head 16 wherein two be provided for regulating said guide plate 11 positions arc groove 18.It is the center of circle that arc groove 18 can adopt with rotating shaft installing hole 17 centers, is radius with arc groove 18 with rotating shaft installing hole 17 the two center distance.
The occupation mode of the above soft plug plug-in and pull-off device; It is other that the plug extracting apparatus is installed in bending mould 19; The metal tube 1 that need are crooked is put into bending mould 19; Primer fluid compressing cylinder 6 makes sliding stopper rod 7 elongations of oil cylinder, promotes connecting axle 8, guiding piece 9 along guide groove 12 forward, and then is promoted in the said soft plug 2 insertion metal tubes 1 by the guiding piece 9 that end plate 3 offsets that exposes of its front end and plug 2; After treating that crooked mould 19 is accomplished the pipe fitting brake forming; Primer fluid compressing cylinder 6 makes sliding stopper rod 7 withdrawals of oil cylinder; Drive connecting axle 8, guiding piece 9 backward, and then expose end plate 3 connectors 4 by plug and drive said soft plug 2 backward, plug 21 is extracted in the metal winding pipe along guide groove 12 along guide groove 12.Because hydraulic jack 6 cylinder body outer ends are provided with rotating shaft, at this moment, hydraulic jack 6 and sliding stopper rod 7 thereof are around oil cylinder rotating shaft 13 swings, and be as shown in Figure 9, can not have influence on connecting axle 8, guiding piece 9 along guide groove 12 backward simultaneously downward traverse.
Sliding stopper rod (7) traverse of oil cylinder is set, make that said plug (2) is pulled out after, its inner with smooth edge still is shelved on bending mould (19) counterdie port, makes soft plug 2 insert and extract and can carry out continuously smoothly.
Claims (9)
1. soft plug plug-in and pull-off device; It is preceding with after soft plug (2) insertion metal tube (1) and the brake forming soft plug (2) being extracted from the crooked port of metal tube (1) to be used for metal tube (1) cold conditions brake forming; Said device comprises by soft bar will have the soft plug (2) that the sheet metal piece serial connection of smooth edge forms; The outer end of said soft plug (2) exposes to the end plate (3) of the metal mouth of pipe after inserting, and is provided with a connection piece (4); Said plug plug-in and pull-off device comprises base plate (5); Vertically be shelved on the hydraulic jack (6) on the base plate (5) as what extract power source; It is characterized in that connecting axle (8) middle part that laterally place the sliding stopper rod (7) of the oil cylinder of said hydraulic jack (6) outer end and is fixedly connected, front side, said connecting axle (8) middle part is provided with tabular guiding piece (9); Said guiding piece (9) is connected with end plate (3) connector (4) that exposes of said plug (2), and the end plate (3) that exposes of its front end and said plug (2) offsets; Said connecting axle end plate (8) two ends are provided with rolling bearing (10); Vertically be symmetrically arranged with a pair of guide plate (11) on the both sides place base plates (5) at the sliding stopper rod of said oil cylinder (7); Said every flipper guide (11) is provided with the guide groove (12) that groove width and said rolling bearing (10) external diameter match; Said guide groove (12) is by same or similar shape of axle center curve and the wide setting of direction after said metal tube (1) bending; And the axle center length of curve of the length of said guide groove (12) after greater than metal tube (1) bending; Said connecting axle (8) is shelved on the guide groove of said guide plate through the rolling bearing (10) that is arranged on its two ends; Said hydraulic jack (6) cylinder body outer end is shelved on the cylinder bracket (14) that is positioned at base plate (5) outside through oil cylinder rotating shaft (13), and said oil cylinder rotating shaft (13) crosswise fixed is arranged on the said cylinder bracket (14), makes said hydraulic jack (6) and sliding stopper rod (7) thereof to rotate around oil cylinder rotating shaft (13).
2. soft plug extracting apparatus as claimed in claim 1; It is characterized in that; Two sheet metal piece serial connections that will constitute plug formed about said plug (2) was divided into by the high strength ropy, and said ropy forms " U " shape circle outside the plug end plate, expose end plate connector (4) as said plug; Said tabular guiding piece is provided with connecting hole (15), and connector " U " shape circle passes this connecting hole (15).
3. soft plug extracting apparatus as claimed in claim 1 is characterized in that said guide plate (11) directly is fixedly installed on the said base plate (5).
4. soft plug extracting apparatus as claimed in claim 1; It is characterized in that; Be close to a pair of guide plate fixed head (16) that is used for fixing said guide plate (11) of arranged outside of said guide plate (11); Said guide plate fixed head (16) is fixed on the said base plate (5); Nearly its two side position in said guide plate (11) below is provided with installing hole, and the relevant position of said guide plate fixed head (16) is provided with groove or the rotating shaft installing hole that is used to regulate said guide plate (11) position, and said guide plate (11) leaves base plate (5) one determining deviations and is mounted on the guide plate fixed head (16) with bolt.
5. soft plug extracting apparatus as claimed in claim 4 is characterized in that, two relevant positions of said guide plate fixed head (16) are provided with the straight trough that is used to regulate said guide plate (11) position, is connected with bolt between said guide plate and the guide plate fixed head (16).
6. soft plug extracting apparatus as claimed in claim 4; It is characterized in that; One of them of two relevant positions of said guide plate fixed head (16) is provided with rotating shaft installing hole (17), replaces bolt as the connector between guide plate (11) and the guide plate fixed head (16) with a rotating shaft; Two relevant positions of said guide plate fixed head (16) wherein two be provided for regulating said guide plate (11) position arc groove (18).
7. soft plug extracting apparatus as claimed in claim 6 is characterized in that, said arc groove (18) is the center of circle with rotating shaft installing hole (17) center, is radius with arc groove (18) with the two center distance of rotating shaft installing hole (17).
8. the metal tube cold conditions has chip bending to add the plug plug method in man-hour; It is characterized in that; Use like each described soft plug plug-in and pull-off device of claim 1 to 7; It is other that said plug plug-in and pull-off device is installed in bending mould (19), and the metal tube (1) that need are crooked is put into bending mould (19), and primer fluid compressing cylinder (6) makes the sliding stopper rod of oil cylinder (7) elongation; Promote said connecting axle (8), guiding piece (9) forward, and then promote said soft plug (2) and insert in the metal tube (1) by the guiding piece (9) that end plate (3) offsets of exposing of its front end and said plug (2) along guide groove (12); After treating that crooked mould (19) is accomplished the pipe fitting brake forming; Primer fluid compressing cylinder (6) makes the sliding stopper rod of oil cylinder (7) withdrawal; Drive said connecting axle (8), guiding piece (9) backward along guide groove (12); And then expose end plate (3) connector (4) by plug and drive said soft plug (2) along guide groove (12) backward, said plug (2) (1) in metal winding pipe is extracted.
9. plug plug method as claimed in claim 8 is characterized in that, sliding stopper rod (7) traverse of oil cylinder is set, make that said plug (2) is pulled out after, its inner with smooth edge still is shelved on bending mould (19) counterdie port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210066052.XA CN102601187B (en) | 2012-03-06 | 2012-03-06 | Soft mandrel inserting and extracting device and inserting and extracting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210066052.XA CN102601187B (en) | 2012-03-06 | 2012-03-06 | Soft mandrel inserting and extracting device and inserting and extracting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102601187A true CN102601187A (en) | 2012-07-25 |
| CN102601187B CN102601187B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210066052.XA Active CN102601187B (en) | 2012-03-06 | 2012-03-06 | Soft mandrel inserting and extracting device and inserting and extracting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822563A (en) * | 2020-07-22 | 2020-10-27 | 芜湖市夯福机械模具有限公司 | Pipe elbow punch forming die |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2205751Y (en) * | 1993-03-19 | 1995-08-23 | 北京天坛家具公司 | Soft connecting mandrel device for rectangle elbow |
| JPH09327728A (en) * | 1996-06-08 | 1997-12-22 | Chiyoda Kogyo Kk | Main mandrel mounting device for tube bending device |
| RU2174885C1 (en) * | 2000-09-27 | 2001-10-20 | Общество с ограниченной ответственностью "Промышленные инвестиции" | Tube bending apparatus |
| CN201186324Y (en) * | 2008-03-11 | 2009-01-28 | 无锡曙光模具有限公司 | Local bending mold special for producing vehicle rearmost axle assembly front beam |
| CN101947583A (en) * | 2010-08-30 | 2011-01-19 | 张家港市明华机械制造有限公司 | Core-pulling device on tube bender |
| CN102139526A (en) * | 2011-03-17 | 2011-08-03 | 厦门市方圆通模具有限公司 | Arc core-pulling device for die |
| CN202539307U (en) * | 2012-03-06 | 2012-11-21 | 宁波敏实汽车零部件技术研发有限公司 | Soft mandril insertion and extraction device |
-
2012
- 2012-03-06 CN CN201210066052.XA patent/CN102601187B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2205751Y (en) * | 1993-03-19 | 1995-08-23 | 北京天坛家具公司 | Soft connecting mandrel device for rectangle elbow |
| JPH09327728A (en) * | 1996-06-08 | 1997-12-22 | Chiyoda Kogyo Kk | Main mandrel mounting device for tube bending device |
| RU2174885C1 (en) * | 2000-09-27 | 2001-10-20 | Общество с ограниченной ответственностью "Промышленные инвестиции" | Tube bending apparatus |
| CN201186324Y (en) * | 2008-03-11 | 2009-01-28 | 无锡曙光模具有限公司 | Local bending mold special for producing vehicle rearmost axle assembly front beam |
| CN101947583A (en) * | 2010-08-30 | 2011-01-19 | 张家港市明华机械制造有限公司 | Core-pulling device on tube bender |
| CN102139526A (en) * | 2011-03-17 | 2011-08-03 | 厦门市方圆通模具有限公司 | Arc core-pulling device for die |
| CN202539307U (en) * | 2012-03-06 | 2012-11-21 | 宁波敏实汽车零部件技术研发有限公司 | Soft mandril insertion and extraction device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822563A (en) * | 2020-07-22 | 2020-10-27 | 芜湖市夯福机械模具有限公司 | Pipe elbow punch forming die |
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| CN102601187B (en) | 2015-07-15 |
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