CN113084019A - Expansion joint process and expansion joint structure - Google Patents
Expansion joint process and expansion joint structure Download PDFInfo
- Publication number
- CN113084019A CN113084019A CN202010022529.9A CN202010022529A CN113084019A CN 113084019 A CN113084019 A CN 113084019A CN 202010022529 A CN202010022529 A CN 202010022529A CN 113084019 A CN113084019 A CN 113084019A
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- pipe body
- expansion
- bore section
- expanded
- bore
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000009434 installation Methods 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 9
- 239000000314 lubricant Substances 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Classifications
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
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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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
- F16B9/07—Connections of rods or tubular parts to flat surfaces at an angle involving plastic or elastic deformation when assembling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention provides an expansion joint process and an expansion joint structure. The expansion joint process comprises the following steps: step S1: processing the mounting pressure plate to enable the mounting pressure plate to be provided with a step hole; step S2: and sleeving the mounting pressing plate outside the pipe body, and performing pipe expansion operation on the pipe body so that the outer surface of the expanded pipe body is attached to the hole wall of the stepped hole. The invention effectively solves the problems that the expansion joint process is more complicated and the labor intensity of workers is increased in the prior art.
Description
Technical Field
The invention relates to the technical field of expanded joint, in particular to an expanded joint process and an expanded joint structure.
Background
At present, for the expanded joint of a pipe body and a pressure plate, the conventional expanded joint method comprises the following steps: firstly, the pipe body is reamed, and then the reamed pipe body and the pressing plate are assembled together to expand the pipe body and the pressing plate.
However, the above expansion joint method causes the assembly of the pipe body and the pressure plate to be complicated and complicated, increases the labor intensity of the working personnel, and causes the processing period of the pipe body and the pressure plate to be long.
Disclosure of Invention
The invention mainly aims to provide an expansion joint process and an expansion joint structure, and aims to solve the problems that the expansion joint process is complicated and the labor intensity of workers is increased in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an expansion joint process including: step S1: processing the mounting pressure plate to enable the mounting pressure plate to be provided with a step hole; step S2: and sleeving the mounting pressing plate outside the pipe body, and performing pipe expansion operation on the pipe body so that the outer surface of the expanded pipe body is attached to the hole wall of the stepped hole.
Further, the expansion joint process also comprises the following steps: step S3: cutting the part of the pipe body outside the mounting pressure plate to form a groove for sleeving the sealing element; or stamping the part of the pipe body, which is positioned outside the mounting pressure plate, so that the pipe body of the part protrudes towards the central axis of the pipe body to form a groove for sleeving the sealing element.
Further, the stepped hole comprises a first hole section and a second hole section connected with the first hole section, the aperture of at least part of the second hole section is gradually reduced along the direction from the second hole section to the first hole section, and the minimum aperture of the second hole section is equal to the aperture of the first hole section.
Furthermore, the inner surface of the first hole section and/or the second hole section is provided with a limiting bulge, and the limiting bulge and the pipe body limit stop.
Furthermore, the stepped hole further comprises a third hole section connected with the second hole section, and the aperture of the third hole section is unchanged and larger than the maximum aperture of the second hole section along the direction from the third hole section to the second hole section.
Further, in step S2, before the expansion part of the expander or the expansion sleeve die is inserted into the pipe body, a lubricant is applied to the outer surface of the expansion part and/or the inner surface of the pipe portion to be expanded of the pipe body.
Further, in step S2, after the lubricant is applied to the outer surface of the expansion portion and/or the inner surface of the pipe body to-be-expanded portion, and before the expansion portion is inserted into the pipe body, the pipe body to-be-expanded portion is annealed.
Further, the expansion joint part comprises a first punch and a second punch, the first punch is used for reaming the second hole section, and the second punch is used for reaming the third hole section.
Further, in step S2, after the installation pressing plate is sleeved outside the tube body, the installation pressing plate is fixed.
Furthermore, the groove is an annular groove, and the annular groove and the pipe body are coaxially arranged.
According to another aspect of the present invention, an expansion joint structure is provided, the expansion joint structure is formed by expansion joint through the expansion joint process, the expansion joint structure includes a mounting pressure plate and a pipe body, the mounting pressure plate has a stepped hole, and the pipe body penetrates through the stepped hole and forms an integral structure with the mounting pressure plate.
By applying the technical scheme of the invention, when the pipe body and the installation pressing plate need to be assembled, the installation pressing plate is firstly processed so as to be provided with the step hole. And then, sleeving the mounting pressing plate outside the pipe body, and performing pipe expansion operation on the pipe body so that the outer surface of the pipe body after expansion is attached to the hole wall of the stepped hole. Like this, after the body is in the same place with the installation clamp plate assembly, also make the body and the installation clamp plate expanded joint together when carrying out expand tube (reaming) to the body, and then left out earlier and carried out expand tube (reaming) to the body, expand this processing step with the body and installation clamp plate again. Compared with the prior art that the pipe body is expanded (reamed) and then expanded tightly, the expanded joint process solves the problems that the expanded joint process is complicated and complicated, the labor intensity of workers is increased, and the processing period is shortened.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a process flow diagram of an embodiment of an expansion process according to the present invention;
fig. 2 shows a cross-sectional view of an intermediate product formed after the expansion process of fig. 1 completes step S2;
FIG. 3 shows a cross-sectional view of an embodiment of an expanded joint structure according to the present invention;
FIG. 4 shows a cross-sectional view of the sleeve of the expanded configuration of FIG. 3;
FIG. 5 shows a cross-sectional view of the mounting platen of the expansion joint of FIG. 3; and
fig. 6 shows a side view of the mounting platen of the expansion joint of fig. 3.
Wherein the figures include the following reference numerals:
10. installing a pressing plate; 11. a stepped bore; 111. a first bore section; 112. a second bore section; 113. a limiting bulge; 114. a third bore section; 20. a pipe body; 21. and (4) a groove.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless stated to the contrary, use of the directional terms "upper and lower" are generally directed to the orientation shown in the drawings, or to the vertical, or gravitational direction; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; "inner and outer" refer to the inner and outer relative to the profile of the respective member itself, but the above directional terms are not intended to limit the present invention.
In order to solve the problems that the expansion joint process is complicated and the labor intensity of workers is increased in the prior art, the application provides the expansion joint process and the expansion joint structure.
As shown in fig. 1 and 2, the expansion joint process includes:
step S1: processing the mounting pressure plate 10 to enable the mounting pressure plate 10 to be provided with a step hole 11;
step S2: the installation pressing plate 10 is sleeved outside the pipe body 20, and pipe expansion operation is performed on the pipe body 20, so that the outer surface of the pipe body 20 after expansion is attached to the hole wall of the stepped hole 11.
By applying the technical scheme of the embodiment, when the pipe body 20 and the installation pressing plate 10 need to be assembled, the installation pressing plate 10 is firstly processed, so that the installation pressing plate 10 has the step hole 11. Then, the installation pressing plate 10 is sleeved outside the pipe body 20, and pipe expansion operation is performed on the pipe body 20, so that the outer surface of the pipe body 20 after expansion is attached to the hole wall of the stepped hole 11. Thus, after the pipe body 20 and the installation pressing plate 10 are assembled together, the pipe body 20 and the installation pressing plate 10 are expanded together while the pipe body 20 is expanded (reamed), and the processing step of expanding the pipe body 20 (reamed) and then expanding the pipe body 20 and the installation pressing plate 10 is omitted. Compared with the prior art that the pipe body is expanded (reamed) and then expanded tightly, the expanded joint process in the embodiment solves the problems that the expanded joint process is complicated and complicated, the labor intensity of workers is increased, and the processing period is shortened.
In this embodiment, the expansion joint process further includes:
step S3: the portion of the pipe body 20 outside the installation pressing plate 10 is punched such that the portion of the pipe body 20 protrudes toward the central axis of the pipe body 20 to form a groove 21 for housing a sealing member.
Specifically, when the outer surface of the expanded pipe body is attached to the wall of the stepped hole, the part of the pipe body, which is positioned outside the mounting pressure plate, is subjected to cutting processing to form a groove for sleeving the sealing element; or stamping the part of the pipe body, which is positioned outside the mounting pressure plate, so that the pipe body of the part protrudes towards the central axis of the pipe body to form a groove for sleeving the sealing element.
In other embodiments not shown in the drawings, step S3 is to perform a cutting process on the portion of the tube outside the mounting platen to form a groove for housing the seal. Specifically, when the pipe body and the installation pressing plate need to be assembled, the installation pressing plate is firstly processed, so that the installation pressing plate is provided with a step hole. And then, sleeving the mounting pressing plate outside the pipe body, and performing pipe expansion operation on the pipe body so that the outer surface of the pipe body after expansion is attached to the hole wall of the stepped hole. And finally, cutting the part of the pipe body, which is positioned outside the mounting pressure plate, so as to form a groove for sleeving the sealing element. Like this, after the body is in the same place with the installation clamp plate assembly, also make the body and the installation clamp plate expanded joint together when carrying out expand tube (reaming) to the body, and then left out earlier and carried out expand tube (reaming) to the body, expand this processing step with the body and installation clamp plate again. Compared with the prior art that the pipe body is expanded (reamed) and then expanded tightly, the expanded joint process in the embodiment solves the problems that the expanded joint process is complicated and complicated, the labor intensity of workers is increased, and the processing period is shortened.
As shown in fig. 5 and 6, the stepped bore 11 includes a first bore section 111 and a second bore section 112 connected to the first bore section 111, and the bore diameter of at least a portion of the second bore section 112 is gradually reduced in a direction from the second bore section 112 to the first bore section 111, and the minimum bore diameter of the second bore section 112 is equal to the bore diameter of the first bore section 111. Like this, at the staff to the body 20 in-process that expands pipe (reaming), the above-mentioned setting of second hole section 112 makes body 20 have sufficient deformation space, and then avoids body 20 because receive the expansion force in the twinkling of an eye and the crackle appears, avoids body 20 to take place structural damage and influence its life.
As shown in fig. 6, the inner surface of the first hole section 111 has a limiting protrusion 113, and the limiting protrusion 113 is limited and stopped by the tube 20. Specifically, a plurality of spacing archs 113 set up along the circumference interval of first hole section 111, and at the in-process that the staff carries out expand tube (reaming) to body 20, spacing archs 113 and the spacing backstop of body 20 to avoid body 20 to take place to rotate and influence the expand tube operation for installation clamp plate 10.
In other embodiments not shown in the drawings, the inner surface of the second bore section has a limit projection, which is in contact with the tube limit stop. Specifically, a plurality of spacing archs set up along the circumference interval of second hole section, carry out the in-process of expand tube (reaming) at the staff to the body, spacing protruding and the spacing backstop of body to avoid the body to take place to rotate and influence the expand tube operation for the installation clamp plate.
In other embodiments not shown in the drawings, the inner surfaces of the first and second bore sections have a limit projection, and the limit projection is in contact with the tube limit stop. A plurality of spacing archs set up along the circumference interval of first hole section, and a plurality of spacing archs set up along the circumference interval of second hole section. In the process of expanding the pipe (reaming) of the pipe body by a worker, the limiting protrusion and the limiting stop of the pipe body prevent the pipe body from rotating relative to the installation pressing plate to influence the pipe expanding operation.
As shown in fig. 5, the stepped bore 11 further includes a third bore segment 114 connected to the second bore segment 112, and the bore diameter of the third bore segment 114 is constant and larger than the maximum bore diameter of the second bore segment 112 in the direction from the third bore segment 114 to the second bore segment 112. Like this, at the staff to the body 20 in-process that expands pipe (reaming), the above-mentioned setting of third hole section 114 makes body 20 have sufficient deformation space, and then avoids body 20 because receive the expansion force in the twinkling of an eye and the crackle appears, avoids body 20 to take place structural damage and influence its life.
In the present embodiment, in step S2, before the expansion portion of the expander or the expansion die is inserted into the tubular body 20, a lubricant is applied to the outer surface of the expansion portion and the inner surface of the portion of the tubular body 20 to be expanded. Thus, the arrangement makes the expansion joint device or the expansion joint sleeve die more easily expand (ream) the pipe body 20, reduces the operation difficulty and further reduces the labor intensity of workers.
In other embodiments not shown in the drawings, in step S2, a lubricant is applied to the outer surface of the expansion portion of the expander or expansion die before the expansion portion extends into the tubular body. Like this, above-mentioned setting makes expanded joint ware or expanded joint cover mould expand the pipe (reaming) of body easier, reduced the operation degree of difficulty, and then reduced staff's intensity of labour.
In other embodiments not shown in the drawings, in step S2, a lubricant is applied to the inner surface of the to-be-expanded portion of the tubular body before the expansion part of the expander or expansion sleeve die extends into the tubular body. Like this, above-mentioned setting makes expanded joint ware or expanded joint cover mould expand the pipe (reaming) of body easier, reduced the operation degree of difficulty, and then reduced staff's intensity of labour.
In this embodiment, in step S2, after the lubricant is applied to the outer surface of the expansion portion and the inner surface of the pipe body 20 to be expanded, and before the expansion portion is inserted into the pipe body 20, the pipe body 20 to be expanded is annealed. Like this, the body 20 after annealing has better material ductility and toughness, and then improves or eliminates body 20 at various organizational defect and the residual stress that the bloated pipe (reaming) in-process produced, avoids body 20 to take place the fracture phenomenon, has promoted body 20's structural strength and plasticity.
In this embodiment, the expansion joint includes a first punch that reams the second bore section 112 and a second punch that reams the third bore section 114.
In this embodiment, in step S2, after the installation pressing plate 10 is fitted around the pipe body 20, the installation pressing plate 10 is fixed. Specifically, after the installation pressing plate 10 is sleeved outside the pipe body 20, the installation pressing plate 10 is fixed by a fixing device, and then, an expansion part of an expansion connector or an expansion sleeve die is stretched into the pipe body 20 to expand (expand) the pipe body 20, so that the pipe body 20 and the installation pressing plate 10 are assembled finally.
In this embodiment, the groove 21 is an annular groove, and the annular groove is disposed coaxially with the pipe body 20. Thus, the arrangement makes the groove 21 simple in structure, easy to process and implement, and reduces the processing cost of the groove 21. After the sealing element is sleeved in the annular groove, the annular groove enables the stress of the pipe body 20 to be more uniform and consistent, and the structural strength of the pipe body 20 is improved.
As shown in fig. 3 to 6, the present application further provides an expansion joint structure, the expansion joint structure is formed by the expansion joint process, the expansion joint structure includes a mounting pressing plate 10 and a pipe body 20, the mounting pressing plate 10 has a stepped hole 11, and the pipe body 20 is inserted into the stepped hole 11 and forms an integral structure with the mounting pressing plate 10.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
when the pipe body and the installation pressing plate need to be assembled, the installation pressing plate is processed firstly, so that the installation pressing plate is provided with a step hole. And then, sleeving the mounting pressing plate outside the pipe body, and performing pipe expansion operation on the pipe body so that the outer surface of the pipe body after expansion is attached to the hole wall of the stepped hole. Like this, after the body is in the same place with the installation clamp plate assembly, also make the body and the installation clamp plate expanded joint together when carrying out expand tube (reaming) to the body, and then left out earlier and carried out expand tube (reaming) to the body, expand this processing step with the body and installation clamp plate again. Compared with the prior art that the pipe body is expanded (reamed) and then expanded tightly, the expanded joint process solves the problems that the expanded joint process is complicated and complicated, the labor intensity of workers is increased, and the processing period is shortened.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An expansion joint process, characterized by comprising:
step S1: processing a mounting pressure plate (10) so that the mounting pressure plate (10) is provided with a step hole (11);
step S2: and sleeving the installation pressing plate (10) outside the pipe body (20), and performing pipe expansion operation on the pipe body (20) so that the outer surface of the pipe body (20) after expansion is attached to the hole wall of the stepped hole (11).
2. The expansion process of claim 1, further comprising:
step S3: cutting the part of the pipe body (20) outside the mounting pressure plate (10) to form a groove (21) for sleeving a sealing element; or stamping the part of the pipe body (20) outside the mounting pressure plate (10) so that the part of the pipe body (20) protrudes towards the central axis of the pipe body (20) to form a groove (21) for sleeving a sealing element.
3. The expansion joint process according to claim 1, wherein the stepped bore (11) comprises a first bore section (111) and a second bore section (112) connected with the first bore section (111), the bore diameter of at least a part of the second bore section (112) is gradually reduced along the direction from the second bore section (112) to the first bore section (111), and the minimum bore diameter of the second bore section (112) is equal to the bore diameter of the first bore section (111).
4. The expansion-joint process according to claim 3, wherein the inner surface of the first bore section (111) and/or the second bore section (112) has a limit projection (113), and the limit projection (113) is in limit stop with the pipe body (20).
5. A expansion joint process according to claim 3, wherein the stepped bore (11) further comprises a third bore section (114) connected with the second bore section (112), and the bore diameter of the third bore section (114) is constant and larger than the maximum bore diameter of the second bore section (112) in the direction from the third bore section (114) to the second bore section (112).
6. The expansion-joint process according to claim 5, wherein in the step S2, before the expansion-joint portion of the expander or the expansion-sleeve die is extended into the pipe body (20), a lubricant is coated on the outer surface of the expansion-joint portion and/or the inner surface of the pipe portion to be expanded of the pipe body (20).
7. The expanding process according to claim 6, wherein in the step S2, after the lubricant is coated on the outer surface of the expanded portion and/or the inner surface of the pipe body (20) to be expanded, and before the expanded portion is protruded into the pipe body (20), the pipe body (20) to be expanded is annealed.
8. The expansion process according to claim 6, wherein the expansion part comprises a first punch for reaming the second bore section (112) and a second punch for reaming the third bore section (114).
9. The expansion joint process according to claim 1, wherein in the step S2, the installation pressing plate (10) is fixed after the installation pressing plate (10) is sleeved outside the pipe body (20).
10. A process according to claim 2, wherein said groove (21) is an annular groove arranged coaxially with said tubular body (20).
11. An expanded joint structure, characterized in that the expanded joint structure is formed by expanded joint through the expanded joint process of any one of claims 1 to 10, the expanded joint structure comprises a mounting pressure plate (10) and a pipe body (20), the mounting pressure plate (10) is provided with a stepped hole (11), and the pipe body (20) is arranged in the stepped hole (11) in a penetrating manner and forms an integral structure with the mounting pressure plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022529.9A CN113084019A (en) | 2020-01-09 | 2020-01-09 | Expansion joint process and expansion joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022529.9A CN113084019A (en) | 2020-01-09 | 2020-01-09 | Expansion joint process and expansion joint structure |
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| CN113084019A true CN113084019A (en) | 2021-07-09 |
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|---|---|---|---|
| CN202010022529.9A Pending CN113084019A (en) | 2020-01-09 | 2020-01-09 | Expansion joint process and expansion joint structure |
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