CN103331346A - Core rod component for pipe-bending machine - Google Patents
Core rod component for pipe-bending machine Download PDFInfo
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- CN103331346A CN103331346A CN2013102958612A CN201310295861A CN103331346A CN 103331346 A CN103331346 A CN 103331346A CN 2013102958612 A CN2013102958612 A CN 2013102958612A CN 201310295861 A CN201310295861 A CN 201310295861A CN 103331346 A CN103331346 A CN 103331346A
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- pearl core
- centre bore
- rod
- mounting rod
- central hole
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Abstract
The invention discloses a core rod component for a pipe-bending machine. The core rod component for the pipe-bending machine comprises a ball core and a core rod, the ball core is in a table shape, the core rod comprises a ball core mounting rod and a connecting rod, an axial first central hole is formed in the front end of the ball core mounting rod, a second central hole communicated with the first central hole is formed in the rear end of the ball core mounting rod, and the hole diameter of the first central hole is smaller than the hole diameter of the second central hole; a thread central hole is formed in the rotary center of the ball core, a connecting bolt is arranged in the first central hole in a clearance fit mode, the connecting bolt is connected with the thread central hole of ball core, a clearance which facilitates the axial movement of the connecting bolt exists between the ball core and the position in front of the end portion of the ball core mounting rod, the second central hole is connected with the front end of the connecting rod, a connecting hole is formed in the rear end of the connecting rod, and the central axis of the ball core mounting rod, the central axis of the connecting rod, the central axis of the first central hole and the central axis of the second central hole are coaxial. The core rod component supports the bent portion of a pipe fitting when a pipe is bent, the bent portion is made not to be easy to flatten and deform, meanwhile, the core rod component is easy to replace, and cost is lowered.
Description
Technical field
The present invention relates to a kind of plug assembly, refer to a kind of bending machine plug assembly especially.
Background technology
The main effect of the plug assembly of bending machine in the pipe fitting BENDING PROCESS is to guarantee the pipe fitting cross section circularity of each rotation angle position when bending, avoids its (flat) distortion that is stretched.The plug assembly that uses at present is integral structure, the pearl core directly is connected with plug, the plug assembly of this kind structure has the following disadvantages: in the pipe fitting BENDING PROCESS, the working position that plug is connected with the pearl core bears bigger stretching frictional force and torsion, when processing reaches a certain amount of, the working position that the plug front end is connected with the pearl core has to change because continuous wearing and tearing gradually cause the diameter of axle to dwindle, and causes and scraps otherwise can make pipe fitting produce serious fold or drawing crack pipe fitting in BENDING PROCESS.Because the pearl core directly is connected with plug, the working position that plug is connected with the pearl core is the part of plug, just means that also plug wants integral replacing, and the processing technology of plug is comparatively complicated, consuming time longer, plug integral body is scrapped not only increases production cost, and delays production.The plug assembly of this integral type the situation of flat distortion, particularly larger-size tubing still can occur drawing when bend pipe in addition.
Summary of the invention
Technical problem to be solved by this invention is: a kind of bending machine plug assembly is provided, and the bending part of this plug assembly support tubes when bend pipe makes it be difficult for being drawn flat distortion, and this plug assembly is easily changed simultaneously, has lowered cost.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of bending machine plug assembly, comprise pearl core and plug, described pearl core is billiard table shape, described plug comprises pearl core mounting rod and connecting rod, the front end of described pearl core mounting rod is provided with the first axial centre bore, and the rear end is provided with second centre bore that is communicated with first centre bore, and the aperture of described first centre bore is less than the aperture of second centre bore; The centre of gyration of described pearl core is provided with threaded central aperture, described first centre bore internal clearance cooperation is equipped with connecting bolt, this connecting bolt is connected with the threaded central aperture of pearl core, exist before the end of described pearl core and pearl core mounting rod and be convenient to the axially movable gap of connecting bolt, described second centre bore is connected with the front end of connecting rod, the rear end of described connecting rod is provided with connecting hole, and the axis of described pearl core mounting rod, connecting rod, first centre bore, second centre bore is coaxial.
As a kind of preferred scheme, the area of the upper bottom surface of the pearl core of described billiard table shape is identical with bottom surface.
As a kind of preferred scheme, the front end face of described pearl core mounting rod is provided with ball recess, and the radius of this ball recess is greater than radius and the ball recess of pearl core.
As a kind of preferred scheme, the diameter of described pearl core mounting rod and the equal diameters of connecting rod.
As a kind of preferred scheme, described connecting hole is screwed hole.
After having adopted technique scheme, effect of the present invention is: owing to be connected by axially movable connecting bolt between this pearl core and the pearl core mounting rod, and, matched in clearance between connecting bolt and first centre bore, so the pearl core both relatively pearl core mounting rod move axially, simultaneously, also can rock by a small margin, therefore, pipe fitting is during by bending, the pearl core can stretch along with the bending part of pipe fitting and move axially, supporting the bending part so as much as possible for a long time, simultaneously, because the pearl core can rock by a small margin, thereby the sphere of pearl core can adaptive as much as possible applying bending part endoporus, avoid the pipe fitting local pressure excessive and cause that the pipe fitting bending part becomes flat.
Again because the front end face of described pearl core mounting rod is provided with ball recess, the radius of this ball recess is greater than radius and the ball recess of pearl core, therefore, when the end of pearl core during at bending line, the end of pearl core has the part and drops in the ball recess, when the beginning of bend pipe, the bending force maximum that pipe fitting is subjected to, at this moment, the pearl core should not rock, thereby the pearl core retrained by ball recess, thus the bending quality when guaranteeing beginning.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structure cutaway view of the embodiment of the invention;
In the accompanying drawing: 1. connecting rod 1; 11. connecting hole 11; 2. pearl core mounting rod 2; 21. first centre bore 21; 22. second centre bore 22; 3. the pearl core 3; 4. connecting bolt 4;
The specific embodiment
The present invention is described in further detail below by specific embodiment.
As shown in Figure 1, a kind of bending machine plug assembly, comprise pearl core 3 and plug, described pearl core 3 is billiard table shape, the area of the upper bottom surface of the pearl core 3 of described billiard table shape is identical with bottom surface, namely this pearl core 3 not only is rotary structure, but also with respect to the median plane symmetry parallel with bottom surface with upper bottom surface; The centre of gyration of described pearl core 3 is provided with threaded central aperture;
Described plug comprises pearl core mounting rod 2 and connecting rod 1, the front end of described pearl core mounting rod 2 is provided with the first axial centre bore 21, the rear end is provided with second centre bore 22 that is communicated with first centre bore 21, the aperture of described first centre bore 21 is less than the aperture of second centre bore 22, like this, first centre bore 21 and second centre bore 22 have constituted stepped through hole jointly; Described first centre bore, 21 internal clearances cooperation is equipped with connecting bolt 4, this connecting bolt 4 is connected with the threaded central aperture of pearl core 3, the nut portion of connecting bolt 4 relies on first hollow and second centre bore 22 cascaded surface before, this connecting bolt 4 can be axial movement, simultaneously since with first centre bore, 21 matched in clearance, thereby connecting bolt 4 can rock in first centre bore 21 by a small margin, described pearl core 3 is convenient to connecting bolt 4 axially movable gaps with the end existence before of pearl core mounting rod 2, described second centre bore 22 is connected with the front end of connecting rod 1, in second centre bore 22, screw thread is set, and the front end of connecting rod 1 is provided with threaded joints, utilize threaded joints to be threaded with second centre bore 22, the rear end of described connecting rod 1 is provided with connecting hole 11, this connecting hole 11 also is screwed hole, be used for this plug assembly is installed on the mandrel of bending machine, described pearl core mounting rod 2, connecting rod 1, first centre bore 21, the axis of second centre bore 22 is coaxial.Wherein, the diameter of pearl core mounting rod 2 and the equal diameters of connecting rod 1 also can be unequal, certainly, all must satisfy and can put into tubing.Further improve, the front end face of described pearl core mounting rod 2 is provided with ball recess, and the radius of this ball recess is greater than radius and the ball recess of pearl core 3.Tubing is when bend pipe, when being subjected to bending force and becoming curved from straight tube, the process tubing of the sudden change when this begins is prone to the situation of drawing flat distortion most, at this moment, ball recess can limit pearl core 3, it was not rocked in the incipient stage, supporting the tubing endoporus so preferably, avoid drawing flat situation, when tubing was further crooked, pearl core 3 can move axially along with the stretching of tubing, thereby in BENDING PROCESS, support this bending part as much as possible, simultaneously pearl core 3 can rock by a small margin, thus self adaptive adjustment, and bend pipe is effective like this.Owing to removably connect between pearl core mounting rod 2 and the pearl core 3, in the bend pipe process, can only change pearl core 3 after 3 wearing and tearing of pearl core so again, provide cost savings.
Claims (5)
1. bending machine plug assembly, comprise pearl core and plug, it is characterized in that: described pearl core is billiard table shape, described plug comprises pearl core mounting rod and connecting rod, the front end of described pearl core mounting rod is provided with the first axial centre bore, the rear end is provided with second centre bore that is communicated with first centre bore, and the aperture of described first centre bore is less than the aperture of second centre bore; The centre of gyration of described pearl core is provided with threaded central aperture, described first centre bore internal clearance cooperation is equipped with connecting bolt, this connecting bolt is connected with the threaded central aperture of pearl core, exist before the end of described pearl core and pearl core mounting rod and be convenient to the axially movable gap of connecting bolt, described second centre bore is connected with the front end of connecting rod, the rear end of described connecting rod is provided with connecting hole, and the axis of described pearl core mounting rod, connecting rod, first centre bore, second centre bore is coaxial.
2. a kind of bending machine plug assembly as claimed in claim 1, it is characterized in that: the area of the upper bottom surface of the pearl core of described billiard table shape is identical with bottom surface.
3. a kind of bending machine plug assembly as claimed in claim 2, it is characterized in that: the front end face of described pearl core mounting rod is provided with ball recess, and the radius of this ball recess is greater than radius and the ball recess of pearl core.
4. a kind of bending machine plug assembly as claimed in claim 3 is characterized in that: the diameter of described pearl core mounting rod and the equal diameters of connecting rod.
5. a kind of bending machine plug assembly as claimed in claim 4, it is characterized in that: described connecting hole is screwed hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102958612A CN103331346A (en) | 2013-07-13 | 2013-07-13 | Core rod component for pipe-bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102958612A CN103331346A (en) | 2013-07-13 | 2013-07-13 | Core rod component for pipe-bending machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103331346A true CN103331346A (en) | 2013-10-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102958612A Pending CN103331346A (en) | 2013-07-13 | 2013-07-13 | Core rod component for pipe-bending machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103331346A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607512A (en) * | 2015-02-08 | 2015-05-13 | 中国第一重型机械股份公司 | Bend forming method of large-angle pipeline with high precision, large pipe diameter and small bending diameter ratio |
| CN110935768A (en) * | 2019-12-06 | 2020-03-31 | 安徽德系重工科技有限公司 | Quick change tool and method for pipe bending machine core rod |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3750455A (en) * | 1971-12-27 | 1973-08-07 | Tools For Bending Inc | Erect tube bending mandrel |
| JPS5079472A (en) * | 1973-11-16 | 1975-06-27 | ||
| DE19707228A1 (en) * | 1997-02-24 | 1998-08-27 | Rudi Maas | Mandrel for manual, semi- or fully-automatic pipe bender |
| CA2269138A1 (en) * | 1999-04-15 | 2000-10-15 | S + P Gesellschaft Fur Industrieanlagen-Modernisierung Mbh | Tube bending apparatus and method |
| DE10125151A1 (en) * | 2001-05-22 | 2002-11-28 | Volkswagen Ag | Pipe bending tool has a tubular insert with a swivel mounted head on spherical mountings and secured by a rigid bolt |
| CN200967072Y (en) * | 2006-11-22 | 2007-10-31 | 上海燕达建设有限公司 | Cold bending core rod |
| CN203002878U (en) * | 2012-11-12 | 2013-06-19 | 柳州长虹机器制造公司 | Combined pipe bender ball pin assembly |
| CN203330203U (en) * | 2013-07-13 | 2013-12-11 | 江苏中核利柏特股份有限公司 | Core rod assembly for pipe bending machine |
-
2013
- 2013-07-13 CN CN2013102958612A patent/CN103331346A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3750455A (en) * | 1971-12-27 | 1973-08-07 | Tools For Bending Inc | Erect tube bending mandrel |
| JPS5079472A (en) * | 1973-11-16 | 1975-06-27 | ||
| DE19707228A1 (en) * | 1997-02-24 | 1998-08-27 | Rudi Maas | Mandrel for manual, semi- or fully-automatic pipe bender |
| CA2269138A1 (en) * | 1999-04-15 | 2000-10-15 | S + P Gesellschaft Fur Industrieanlagen-Modernisierung Mbh | Tube bending apparatus and method |
| DE10125151A1 (en) * | 2001-05-22 | 2002-11-28 | Volkswagen Ag | Pipe bending tool has a tubular insert with a swivel mounted head on spherical mountings and secured by a rigid bolt |
| CN200967072Y (en) * | 2006-11-22 | 2007-10-31 | 上海燕达建设有限公司 | Cold bending core rod |
| CN203002878U (en) * | 2012-11-12 | 2013-06-19 | 柳州长虹机器制造公司 | Combined pipe bender ball pin assembly |
| CN203330203U (en) * | 2013-07-13 | 2013-12-11 | 江苏中核利柏特股份有限公司 | Core rod assembly for pipe bending machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607512A (en) * | 2015-02-08 | 2015-05-13 | 中国第一重型机械股份公司 | Bend forming method of large-angle pipeline with high precision, large pipe diameter and small bending diameter ratio |
| CN110935768A (en) * | 2019-12-06 | 2020-03-31 | 安徽德系重工科技有限公司 | Quick change tool and method for pipe bending machine core rod |
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Application publication date: 20131002 |