CN112524361B - Integrally formed flange based on cold bending process and machining method thereof - Google Patents
Integrally formed flange based on cold bending process and machining method thereof Download PDFInfo
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- CN112524361B CN112524361B CN202011204621.3A CN202011204621A CN112524361B CN 112524361 B CN112524361 B CN 112524361B CN 202011204621 A CN202011204621 A CN 202011204621A CN 112524361 B CN112524361 B CN 112524361B
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- section
- flange
- integrally formed
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- bent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/036—Flanged joints the flanges being connected by members tensioned axially characterised by the tensioning members, e.g. specially adapted bolts or C-clamps
Abstract
The invention relates to the technical field of air pipe flanges, in particular to a flange processing method based on cold bending technology integrated forming, which comprises the following steps: using a roller device to enable the metal plate strip to generate plastic deformation in a cold state to form a section with a specific section; the specific section takes the section of the plate strip as a base surface and comprises at least one flange neck formed by folding the end part of the plate strip to one side at a certain angle; said certain angle is between 60 ° and 120 °; cutting the section obtained in the step to form a part to be bent, wherein notches are cut at both sides of the part to be bent to serve as bending spaces; and bending the bending part of the section bar treated in the step, and shaping after bending. The cold bending process is adopted to realize the integral forming of the flange, the whole processing process realizes the flow process, and the operation of workers during the field assembly is reduced; during specific implementation, the flange can be preprocessed in a factory, final forming and assembling can be completed at one time, operation is simple, and efficiency is higher.
Description
Technical Field
The invention belongs to the technical field of air pipe flanges, and particularly relates to an integrally formed flange based on a cold bending process and a processing method thereof.
Background
Along with the increasing popularization of central air conditioners, the demand of ventilation pipelines is also larger and larger, and because the length of the ventilation pipelines is formed by connecting a section of air-saving pipe according to the ventilation distance, flanges are required to be fixedly connected at the joint of the ventilation pipelines.
At present, two forms of a thin steel plate flange and an angle steel flange are mainly applied, the connection strength of a thin steel plate flange air pipe is poor, the angle steel flange is manufactured by the procedures of blanking, welding, drilling, corrosion prevention and the like of angle steel, the whole set of manufacturing procedures are finished manually, and the production efficiency and the manufacturing quality cannot be guaranteed.
Disclosure of Invention
In view of the above situation, the present invention provides a rivetless assembling structure for an air duct and an assembling method thereof, which overcome the drawbacks of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the method comprises the following steps:
using a roller device to enable the metal plate strip to generate plastic deformation in a cold state to form a section with a specific section; the specific section takes the section of the plate strip as a base surface and comprises at least one flange neck formed by folding the end part of the plate strip to one side at a certain angle;
said certain angle is between 60 ° and 120 °;
cutting the section obtained in the step to form a part to be bent, wherein notches are cut at both sides of the part to be bent to serve as bending spaces;
and bending the section treated in the step, and shaping after bending.
Preferably, the flange neck has two spaced apart portions.
Preferably, the flange neck comprises an outer buckling neck and an inner buckling neck which are arranged in parallel.
Preferably, the external buckling neck is formed by inwards turning over a section of transition section parallel to the plate strip body from the end part of the plate strip and then inwards turning over again.
Preferably, one end part of the transition section, which is far away from the outer buckling neck, is turned over to form a corner section.
Preferably, the certain angle is 90 °.
Preferably, the notch comprises an arc notch and a right-angle notch which are respectively arranged at two sides of the part to be bent.
Preferably, the notches are formed by a punching and chamfering machine, the punching and chamfering machine is provided with a rectangular punch and two circular punches, and the two sets of notches are simultaneously cut and formed in one reciprocating motion by the driving force of the driving part.
Preferably, when the part to be bent is bent, the part to be bent is turned towards one side of the right-angle notch, and after the part to be bent is turned, two ends of the right-angle notch are attached.
Preferably, the shaping method after bending is to form a hole at one end of the section bar, extend a connecting sheet at the other end, and when the section bar is bent to form a closed structure, the connecting sheet is cut to enter the opened hole for clamping.
Compared with the prior art, the invention has the beneficial effects that:
1) The cold bending process is adopted to realize the integral molding of the flange, the whole processing process realizes the flow process, and the operation of workers during the field assembly is reduced; can carry out the preprocessing of flange in the mill, during final assembly, once only accomplish final shaping and assembly, easy operation, efficiency is higher.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic flow chart of the flange processing of the present invention.
Fig. 2 is a schematic view of an assembled state described in the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): referring to fig. 1, a method for processing a flange integrally formed based on a cold bending process includes the following steps:
step one, forming a section by cold bending;
cutting to form a part to be bent;
bending, enclosing, sealing and shaping to form a flange;
then, specifically, in step one:
using a roller device to enable the metal plate strip to generate plastic deformation in a cold state to form a section with a specific section; and the roller device is adopted for cold bending treatment, so that the requirement on the straightness of the flange edge can be met.
The specific section can be seen in a reference figure, and the specific section is taken as a base surface and comprises at least one flange neck formed by turning an end part of the plate strip to one side at a certain angle;
it is worth mentioning here that the design of the flange neck can refer to the specific structure of the air duct, and most of the air ducts are 90 degrees, so that the flange neck here is also selected to be 90 degrees; however, there are also a few ducts which are expanded at their ends to an open or narrow configuration, the end face angle of which may be between 60 and 120, so that the angle of the flange neck can be changed accordingly for adaptation.
And the final shaping is a closed annular flange, and the clamping degree of the air pipe can be restrained by the inner diameter of the closed annular flange, so that the air pipe can be fixed only by one flange neck.
However, in another preferred embodiment of the invention, in order to improve the assembly strength, the method is applicable to the existing air ducts with most double-layer steel plates; it is necessary to set the flange necks to two; namely an inner fastening flange neck 21 and an outer fastening flange neck 22 in the figure, an assembly cavity 2 is defined between the inner fastening flange neck 21 and the outer fastening flange neck 22 and is used for clamping an inner layer of steel plate and an outer layer of steel plate of the air pipe, and the stability is improved.
On the basis, in order to realize the connection between the two flanges, a connecting surface is required, the connecting surface needs to be positioned at the outer side of the outer buckling flange neck 22, and in order to ensure the connection strength, thickening treatment is required at the position, and the working procedure is combined with the forming working procedure of the flange neck; the end of the metal plate strip is turned inwards to form a section of transition section (i.e. a connecting surface) parallel to the plate strip body, and the transition section is turned inwards again to form the outer buckling flange neck 22. The connection surface can be provided with a threaded hole for butt joint.
It is also possible to fold a corner section 24 at the end of the connecting surface. Referring to fig. 2 again, a in the figure is two air pipes, the corner section 24 is fixed by a fixing piece B, the fixing piece B is in a C-shaped structure, and the fixing piece B comprises two sections of barb parts which are mutually clamped with the corner section 24 to complete the fixing of the two sections of flanges.
And the cutting in the second step comprises the steps of adopting a punching and chamfering machine, arranging a rectangular punch and two circular punches on the punching and chamfering machine, and cutting two sections of notches on the sectional material in one reciprocating motion by utilizing the driving force of a driving part. The two sections of gaps are positioned at two sides and are respectively a circular arc gap and a right-angle gap in the figure. A part to be bent is formed between the notches, and the notches are spaces for bending the part to be bent.
In the third step, the bending is performed on one side of the part to be bent, which faces the right-angle notch, after the bending, the right-angle sections are attached together, and the two sections of the circular-arc notch are far away from each other, so that a closed annular flange is finally formed.
Finally, it is worth mentioning that after bending and forming, the formed gaps can be fixed in an electric welding mode.
Also can adopt the mode of cold pressing design to fix: and extruding to make the two sections of metal deform and extrude and then fix with each other (similar to the principle of a rivet). This way the connection is tight and stable.
The connection mode of the buckle can also be adopted: and when the section bar is bent to form a closed structure, the connecting sheet is cut to enter the opened hole for clamping. This mode, the operation is more convenient. And the connecting sheet and the hole can be processed in a cold pressing mode after clamping so as to adapt to a mounting environment with higher requirements.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A processing method of a flange integrally formed based on a cold bending process is characterized by comprising the following steps: the method comprises the following steps:
using a roller device to enable the metal plate strip to generate plastic deformation in a cold state to form a section with a specific section; the specific section takes the section of the plate strip as a base surface and comprises at least one flange neck formed by folding the end part of the plate strip to one side at a certain angle;
the flange neck comprises an outer buckling neck and an inner buckling neck which are arranged in parallel;
the certain angle is between 60 degrees and 120 degrees;
cutting the section obtained in the step to form a part to be bent, wherein notches are cut out on both sides of the part to be bent to serve as bending spaces;
and (3) bending the section bar treated in the step to be bent, and shaping after bending.
2. The method for processing the flange integrally formed based on the cold bending process according to claim 1, wherein the method comprises the following steps: the flange neck has two that the interval set up.
3. The method for processing the flange integrally formed based on the cold bending process according to claim 1, wherein the method comprises the following steps: the external buckling neck is formed by inward turning of the end part of the plate strip to form a section of transition section parallel to the plate strip body and inward turning again.
4. The method for processing the flange integrally formed based on the cold bending process according to claim 3, wherein the method comprises the following steps: and one end part of the transition section, which is far away from the outer buckling neck, is turned over to form a corner section.
5. The method for processing the flange integrally formed based on the cold bending process according to claim 1, wherein the method comprises the following steps: the certain angle is 90 degrees.
6. The method for processing the flange integrally formed based on the cold bending process according to claim 5, wherein the method comprises the following steps: the breach is including locating arc breach and the right angle breach of waiting to bend the portion both sides respectively.
7. The method for processing the flange integrally formed based on the cold bending process according to claim 6, wherein the method comprises the following steps: the notches are obtained by the operation of a punching and chamfering machine, a rectangular punch and two circular punches are arranged on the punching and chamfering machine, and two groups of notches are simultaneously cut and molded in one reciprocating motion by utilizing the driving force of a driving part.
8. The method for processing the flange integrally formed based on the cold bending process according to claim 7, wherein the method comprises the following steps: when the part to be bent is bent, the part is turned towards one side of the right-angle notch, and after the part is turned, two ends of the right-angle notch are attached.
9. The method for processing the flange integrally formed based on the cold bending process according to claim 8, wherein the method comprises the following steps: the shaping method after bending is that a hole is formed at one end part of the section, a connecting sheet extends out of the other end part, and when the section is bent to form a closed structure, the connecting sheet is cut to enter the formed hole for clamping.
10. The utility model provides a flange based on cold-bending technology integrated into one piece which characterized in that: processed by the process of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204621.3A CN112524361B (en) | 2020-11-02 | 2020-11-02 | Integrally formed flange based on cold bending process and machining method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204621.3A CN112524361B (en) | 2020-11-02 | 2020-11-02 | Integrally formed flange based on cold bending process and machining method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112524361A CN112524361A (en) | 2021-03-19 |
| CN112524361B true CN112524361B (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011204621.3A Active CN112524361B (en) | 2020-11-02 | 2020-11-02 | Integrally formed flange based on cold bending process and machining method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2234387C3 (en) * | 1972-07-13 | 1980-11-27 | Georg 7410 Reutlingen Mez | Device for connecting frame legs in air ducts and containers |
| DE3914756A1 (en) * | 1989-05-05 | 1990-11-22 | Platzer Schwedenbau Gmbh | METHOD FOR PRODUCING A PIPE FLANGE CONNECTION |
| CN2786407Y (en) * | 2004-12-31 | 2006-06-07 | 王联庆 | Air duct connector |
| DE202007007165U1 (en) * | 2007-05-19 | 2007-08-23 | Stephan Dick Profile Gmbh | Cold rolled sheet metal flange profile for joining air duct elements has outer and inner sheets folded over each other between two air chambers, whereby four sheets of fold are pressed together |
| CN201599505U (en) * | 2010-01-08 | 2010-10-06 | 京琳有限公司 | Air duct connecting structure and buckling tool thereof |
| JP2012225500A (en) * | 2011-04-22 | 2012-11-15 | Mitsubishi Electric Corp | Pipe flange connection structure |
| CN102794614B (en) * | 2012-08-30 | 2015-02-11 | 西安空间无线电技术研究所 | Bending type forming method of corner cut waveguide bend |
| CN102913657B (en) * | 2012-09-28 | 2016-03-16 | 付祥文 | A kind of plate flange air valve body and preparation method thereof altogether |
| CN203784484U (en) * | 2014-04-24 | 2014-08-20 | 梁宜松 | Reinforced double-sidedcolor steel plate composite air duct |
| CN105782605B (en) * | 2016-05-12 | 2018-01-02 | 陕西建工安装集团有限公司 | Ventilation and air conditioning system pressure resistant type airduct Anti-air-leakage constructs and airduct tube coupling processing method |
| CN206530792U (en) * | 2017-02-13 | 2017-09-29 | 梁宜松 | A kind of enhanced attachment means of composite air duct ventilation shaft |
| CN206682463U (en) * | 2017-02-28 | 2017-11-28 | 中国二十冶集团有限公司 | Metal bellows flange |
| CN207178945U (en) * | 2017-04-14 | 2018-04-03 | 德州鹏发空调设备有限公司 | A kind of common plate flange of integral material welding |
| CN208123178U (en) * | 2018-01-30 | 2018-11-20 | 长沙市大川防火材料有限公司 | A kind of novel reinforced plate assembly connector |
| CN108942117B (en) * | 2018-08-31 | 2020-10-09 | 苏州荣业机械有限公司 | U-shaped aluminum material L-shaped bevel machining process |
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2020
- 2020-11-02 CN CN202011204621.3A patent/CN112524361B/en active Active
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