CN201815578U - Cold extruding mold core of metal bent pipe - Google Patents
Cold extruding mold core of metal bent pipe Download PDFInfo
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- CN201815578U CN201815578U CN2010205300495U CN201020530049U CN201815578U CN 201815578 U CN201815578 U CN 201815578U CN 2010205300495 U CN2010205300495 U CN 2010205300495U CN 201020530049 U CN201020530049 U CN 201020530049U CN 201815578 U CN201815578 U CN 201815578U
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- bend pipe
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Abstract
The utility model relates to a cold extruding mold core of a metal bent pipe in a pipe bending technology, aiming at solving the defects that the loss of stuffing is serious, the time of working procedure is long, and the bending cost of a pipe fitting is high as the stuffing needs to be filled in the conventional pipe bending technology. The cold extruding mold core comprises a base axle and a work end. The cold extruding mold core is characterized in that the work end is enclosed by a plurality of curved surfaces, the axial projection of the work end along the base axle is circular, the circular diameter is matched with the inner diameter of the bent pipe, and the work end comprises a first curved surface which is matched with the outer side surface of the bending part of the bent pipe and a second curved surface which is matched with the inner side surface of the bending part of the bent pipe. The cold extruding mold core can be led in the pipe fitting by a leading part of the work end, can lead the pipe fitting to be bended along the bent arc under the limitation of each curved surface of the leading part, and can trim the end of the bent pipe by the work end when the mold core is withdrawn, thereby guaranteeing that the end of the bent pipe is circular to be conveniently connected and matched with the other pipe fittings.
Description
Technical field
The utility model relates to a kind of mould, the metal winding pipe cold extrusion core rod that uses in especially a kind of bent tube technique.
Background technology
Traditional bent tube technique uses bending machine, and by the guiding of bending machine, pipe fitting is bent, still, this technology, in the pipe fitting bending, the position easy deformation of pipe fitting bending, may become flat-shaped, cumbersome in the pipe fitting butt joint like this, and also the docking site is also than being easier to cause leakage.Therefore in the existing pipe fitting bending method, use a kind of technology of filling, in pipe fitting, fill, such as irritating plumbous, irritating wax or steel ball etc., what irritate plumbous employing is at inner adding of pipe fitting and the suitable lead of pipe fitting internal diameter volume, needs process blanking, molten lead, irritates lead, moulding, deleading, scarfing 6 procedures, and the pipe fitting surface also needs to remove the residual lead of pipe fitting inner wall through the mode of overpickling, be engaged in plumbous work for a long time, all can cause bigger harm the environment of plant and workman; Irritate wax with irritate plumbous the same also will be through 6 procedures, the forming method of irritating plumbous and irritating wax needs that the chien shih pipe fitting cools off when a large amount of, will cause the production cycle prolongation of pipe fitting bending like this; The method of steel ball need be added steel ball repeatedly in forming process, needing more after moulding, exchange device carries out the steel ball shaping again, cause whole activity time long, the equipment that needs is also more, and it is also bigger to the wearing and tearing of core rod, pipe fitting is also wrinkling easily, and these fillers in use can reduce or loss, and the cost of pipe fitting bending is higher.
Patent Office of the People's Republic of China has announced a CN201436097U patent on April 7th, 2010, name is called the mandrel that is used for the metal tube bending tube forming, the front end of mandrel is coniform, its cone tip part is provided with respect to the central axis of mandrel is eccentric, and deflection bend pipe inboard, the cone tip part rounding off, on the cross section of the front end of mandrel, little towards the cross section of bend pipe inboard camber ratio towards the cross section radian in the bend pipe outside, be provided with grease channel in the mandrel, one end perforate of nozzle opening is in the front end of grease channel, its other end perforate is in the front end outer radius of mandrel, and an end perforate of fuel feed hole is in the rear end of grease channel, and its other end perforate is in the rear end of mandrel outer radius, the rear end of mandrel is provided with the internal thread hole identical with grease channel, and an end perforate of fuel feed hole is in internal thread hole.When but pipe fitting is used the bending machine bending, the end of pipe fitting can be identical with the leading section of mandrel gradually, the cross sectional shape of pipe fitting can deform, the crooked position of final bend pipe just is not circular, connect miscellaneous part if desired herein, then also need shaping is carried out at the bend pipe position, increased operation, also increased operation easier.
Summary of the invention
The utility model has solved to need in traditional pipe bending technique to fill and has caused the filler loss serious, and activity time is long, the high shortcoming of the crooked cost of pipe fitting, a kind of use cold-stamped processing mode is provided, can repeat to use continuously, activity time is short, crooked lower-cost metal winding pipe cold extrusion core rod.
The utility model has also solved the mandrel that uses in the prior art need be equipped with shaping tool separately, has increased operation, also increases the shortcoming of operation easier, a kind of once just energy moulding is provided, and in the end one going on foot the metal winding pipe cold extrusion core rod that carries out shaping, activity time is few, and is simple to operate.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of metal winding pipe cold extrusion core rod, comprise standard shaft and working end, it is characterized in that the working end is surrounded by many curved surfaces, the working end is circular along the axis projection of standard shaft, circular diameter and bend pipe internal diameter are suitable, and the working end comprises and suitable first surface of the lateral surface of bend pipe crooked position and and the second suitable curved surface of medial surface of bend pipe bending.When pipe fitting is crooked, two actions will be finished in the working end of core rod, pipe fitting to be imported and forms a preliminary crooked shape earlier, then core rod can withdraw from, at this moment, the working end need be repaired the crooked position of bend pipe, make being of the required size of pipe fitting bending part, bending radius such as bend pipe, the bending end diameter of bend pipe, finishing to bend pipe spare when the axis projection of work just can guarantee that for circle core rod withdraws from adheres to specification, the first surface of working end and second curved surface are consistent with the crooked position of bend pipe respectively, make the size conforms designing requirement of crooked position of bend pipe, the former straight tube before this of pipe fitting along first surface and the bending gradually of second curved surface, forms the lateral surface position and the medial surface position of bend pipe bending.
As preferably, the working end comprises transition part that links to each other with standard shaft and the introduction part that is connected by turnover face with transition part, and the first surface and second curved surface are arranged on the introduction part, and second curved surface increases to the distolateral radial dimension of working gradually from the standard shaft side.When pipe fitting passes through the core rod bending, introduction part can play the effect of guiding, crooked gradually along the first surface and second curved surface, and the shape at the shape of the first surface and second curved surface and the corresponding position of bend pipe matches, bend pipe is not easy distortion in bending like this, the variation of the radial dimension of second curved surface can prevent the localized cracks that the quick bending of pipe fitting causes, and plays the effect of a buffering; Turnover face is the position that the radial dimension of working end from excessive portion to introduction part changes from small to big from large to small again and change herein.
As preferably, the edge of turnover face and the radial dimension at the corresponding position of bend pipe curved interior face less than with the radial dimension at the corresponding position of bend pipe curved outer.In the time of the pipe fitting bending, the bending radius of the medial surface of crooked position is less than the bending radius of lateral surface, therefore the curvature of medial surface changes the curvature variation greater than the outside, the radial dimension at the corresponding position of turnover face medial surface is less than the actual size of pipe fitting crooked position medial surface, by the variation herein of turnover face, can prevent that bend pipe from crackle taking place herein so that there is the buffering of a radian at the position of turnover face both sides.
As preferably, the working end is provided with introduction part, and introduction part is provided with and corresponding the 3rd curved surface of first surface, and the 3rd curved surface is connected with the edge of second curved surface, and the 3rd curved surface is a symmetrical structure, and the line of symmetry of the 3rd curved surface is parallel with the axis of core rod.Core rod is when bending pipe fitting, use parts pipe fitting is pushed into introduction part, the 3rd curved surface is over against the end face of the relative introduction part of pipe fitting, the line of symmetry of the 3rd curved surface is parallel with the axis of core rod to make that this headed into parts when pipe fitting imported and is placed restrictions on by the 3rd curved surface, and the 3rd curved surface is returned pipe fitting and entered introduction part and play guide effect simultaneously.
As preferably, be provided with fillet surface between the 3rd curved surface and the first surface.Fillet surface connects first surface and the 3rd curved surface, also can play guide effect to pipe fitting, and fillet surface makes that the connecting portion between first surface and the 3rd curved surface is a rounding off, can not have the sword limit, therefore can not cause cut to the inner surface of pipe fitting.
As preferably, the working end comprises transition part, transition part comprise with the corresponding inner transition curved surface of bend pipe curved interior and with the corresponding outside of bend pipe curved outside fillet surface, the inner transition curved surface increases to turnover face N-Side surf radian gradually from the standard shaft side.Pipe fitting begins bending when introduction part imports, consider that quick crooked meeting cause crackle to pipe fitting, in bending, to there be the position of a buffering to prevent quick bending, transition part just can play buffering in the pipe fitting bending, pipe fitting is expanded by transition part gradually through behind the turnover face, and moves closer to final shape, withdrawing shaping by the working end at last, by the expansion of transition part, the working end shaping is just than being easier to, and resistance ratios is less.
As preferably, the outside fillet surface of transition part is the structure of indent at the position near the standard shaft side, and outside fillet surface becomes big at the indent position gradually to the radial dimension between the turnover face.The indent position becomes the position of outside fillet surface radial dimension minimum, and by outside fillet surface, the lateral surface location bending to the inside that makes the pipe fitting bending carries out shaping by the working end when core rod withdraws from, thus the resistance that reduces to withdraw from.
As preferably, the inner transition curved surface is a symmetrical structure, and line of symmetry is on the axial vane surface of core rod.Core rod generally scribbles lubricating oil in order to reduce resistance in to the pipe fitting bending.
As preferably, the end of standard shaft is provided with boss, and the boss outside is the end of thread, is provided with escape between the end of thread and the boss.Core rod is connected with power set by screw thread, drives the core rod motion by power set, can control the thrust of core rod motion simultaneously.
The beneficial effects of the utility model are: at the introduction part importing pipe fitting of core rod by the working end, and under the restriction of each curved surface of introduction part along the crooked radian bending, when withdrawing from, can repair the bend pipe end by the working end again core rod, guarantee that the bend pipe end is in circle, conveniently is connected cooperation with other pipe fittings.
Description of drawings
Fig. 1 is a kind of perspective view of the utility model; Fig. 2 is a kind of upward view of the utility model; Fig. 3 is a kind of side view of the utility model; Among the figure: 1, standard shaft, 2, the working end, 3, transition part, 4, introduction part, the 5, the 3rd curved surface, 6, fillet surface, 7, first surface, 8, second curved surface, 9, turnover face, 10, the inner transition curved surface, 11, outside fillet surface, 13, boss, 14, the end of thread, 15, joint face.
The specific embodiment
Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of metal winding pipe cold extrusion core rod (referring to accompanying drawing 1 accompanying drawing 2 accompanying drawings 3), comprise standard shaft 1 and working end 2, core rod integral body is cylindrical, working end 2 is an eccentric structure, the tail end of standard shaft 1 is provided with boss 13, boss 13 outsides are the end of thread 14, working end 2 is divided into transition part 3 that is connected with standard shaft and the introduction part 4 that is connected by turnover face 9 as end and transition part, working end 2 is surrounded by many curved surfaces, working end 2 is circular along the axis projection of standard shaft, circular diameter and bend pipe internal diameter are suitable, transition part 3 comprise with the corresponding inner transition curved surface of bend pipe curved interior 10 and with the corresponding outside of bend pipe curved outside fillet surface 11, inner transition curved surface 10 increases to turnover face N-Side surf radian gradually from the standard shaft side, inner transition curved surface 10 is a symmetrical structure, line of symmetry is on the axial vane surface of core rod, outside fillet surface 11 radially projectings are drops (referring to accompanying drawing 2), outside fillet surface 11 is the structure of indent at the position near the standard shaft side, outside fillet surface becomes big at the indent position gradually to the radial dimension between the turnover face, introduction part 4 comprise with the suitable first surface of the lateral surface of bend pipe crooked position 7 and with the second suitable curved surface 8 of medial surface of bend pipe bending, second curved surface 8 increases to the distolateral radial dimension of work gradually from the standard shaft side, the radial dimension at the edge of turnover face 9 and the corresponding position of bend pipe curved interior face less than with the radial dimension at the corresponding position of bend pipe curved outer, introduction part 4 is provided with and first surface 7 corresponding the 3rd curved surfaces 5, the 3rd curved surface 5 is connected with the edge of second curved surface 8, the 3rd curved surface 5 is a symmetrical structure, the line of symmetry of the 3rd curved surface 5 is parallel with the axis of core rod, the 3rd curved surface 5 is the suitable arc surface of R in the elbow with pipe, is provided with fillet surface 6 between the 3rd curved surface and the first surface.
Need be equipped with a die holder in the time of the pushing bend pipe, be provided with the bend pipe passage in the die holder, the shape of bend pipe passage and bend pipe bending is suitable, core rod inserts from an end of bend pipe passage, pipe fitting inserts from the other end of bend pipe passage, the internal diameter of the standard shaft of core rod and bend pipe passage is suitable, the inwall of working end and bend pipe passage is reserved the gap of the wall thickness of a pipe fitting at least, pipe fitting is headed into parts by one and heads into, and the end of pipe fitting is crooked gradually along the first surface and second curved surface of introduction part, and control heads into the degree of depth that heads into of parts, after appropriate depth, core rod is withdrawed from, and the working end is rebuild the end of pipe fitting, makes that finally the two ends of pipe fitting are all circular.
Above-described embodiment is a kind of preferred version of the present utility model, is not the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (9)
1. metal winding pipe cold extrusion core rod, comprise standard shaft and working end, it is characterized in that the working end is surrounded by many curved surfaces, the working end is circular along the axis projection of standard shaft, circular diameter and bend pipe internal diameter are suitable, and the working end comprises and suitable first surface of the lateral surface of bend pipe crooked position and and the second suitable curved surface of medial surface of bend pipe bending.
2. metal winding pipe cold extrusion core rod according to claim 1, it is characterized in that the working end comprises transition part that links to each other with standard shaft and the introduction part that is connected by turnover face with transition part, the first surface and second curved surface are arranged on the introduction part, and second curved surface increases to the distolateral radial dimension of work gradually from the standard shaft side.
3. metal winding pipe cold extrusion core rod according to claim 2, the edge that it is characterized in that the face of transferring and the radial dimension at the corresponding position of bend pipe curved interior face less than with the radial dimension at the corresponding position of bend pipe curved outer.
4. according to claim 1 or 2 or 3 described metal winding pipe cold extrusion core rods, it is characterized in that the working end is provided with introduction part, introduction part is provided with and corresponding the 3rd curved surface of first surface, the 3rd curved surface is connected with the edge of second curved surface, the 3rd curved surface is a symmetrical structure, and the line of symmetry of the 3rd curved surface is parallel with the axis of core rod.
5. metal winding pipe cold extrusion core rod according to claim 4 is characterized in that being provided with fillet surface between the 3rd curved surface and the first surface.
6. according to claim 1 or 2 or 3 described metal winding pipe cold extrusion core rods, it is characterized in that the working end comprises transition part, transition part comprise with the corresponding inner transition curved surface of bend pipe curved interior and with the corresponding outside of bend pipe curved outside fillet surface, the inner transition curved surface increases to turnover face N-Side surf radian gradually from the standard shaft side.
7. metal winding pipe cold extrusion core rod according to claim 6 is characterized in that the outside fillet surface of transition part is the structure of indent at the position near the standard shaft side, and outside fillet surface becomes big at the indent position gradually to the radial dimension between the turnover face.
8. metal winding pipe cold extrusion core rod according to claim 6 is characterized in that the inner transition curved surface is a symmetrical structure, and line of symmetry is on the axial vane surface of core rod.
9. according to claim 1 or 2 or 3 described metal winding pipe cold extrusion core rods, it is characterized in that the end of standard shaft is provided with boss, the boss outside is the end of thread, is provided with escape between the end of thread and the boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205300495U CN201815578U (en) | 2010-09-16 | 2010-09-16 | Cold extruding mold core of metal bent pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205300495U CN201815578U (en) | 2010-09-16 | 2010-09-16 | Cold extruding mold core of metal bent pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201815578U true CN201815578U (en) | 2011-05-04 |
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ID=43913550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205300495U Expired - Fee Related CN201815578U (en) | 2010-09-16 | 2010-09-16 | Cold extruding mold core of metal bent pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201815578U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338813A (en) * | 2014-11-06 | 2015-02-11 | 珠海格力电器股份有限公司 | Pipeline bending core bar |
| CN106552848A (en) * | 2016-11-14 | 2017-04-05 | 芜湖通和汽车管路***股份有限公司 | For the core muscle of automobile pipeline bending |
| CN110788283A (en) * | 2019-11-26 | 2020-02-14 | 佛山市南海力格模具五金有限公司 | Casting mold core |
| CN112893557A (en) * | 2021-02-25 | 2021-06-04 | 南京工程学院 | Copper pipe bending device based on lead pouring process and pipe bending method thereof |
-
2010
- 2010-09-16 CN CN2010205300495U patent/CN201815578U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338813A (en) * | 2014-11-06 | 2015-02-11 | 珠海格力电器股份有限公司 | Pipeline bending core bar |
| CN106552848A (en) * | 2016-11-14 | 2017-04-05 | 芜湖通和汽车管路***股份有限公司 | For the core muscle of automobile pipeline bending |
| CN110788283A (en) * | 2019-11-26 | 2020-02-14 | 佛山市南海力格模具五金有限公司 | Casting mold core |
| CN112893557A (en) * | 2021-02-25 | 2021-06-04 | 南京工程学院 | Copper pipe bending device based on lead pouring process and pipe bending method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20140916 |
|
| EXPY | Termination of patent right or utility model |