CN108890235B - Steel lining stainless steel groove part and manufacturing method thereof - Google Patents
Steel lining stainless steel groove part and manufacturing method thereof Download PDFInfo
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- CN108890235B CN108890235B CN201810961765.XA CN201810961765A CN108890235B CN 108890235 B CN108890235 B CN 108890235B CN 201810961765 A CN201810961765 A CN 201810961765A CN 108890235 B CN108890235 B CN 108890235B
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- steel
- necking
- pipe
- expansion
- flaring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
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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
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
- F16L9/04—Reinforced pipes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention relates to a steel lining stainless steel groove part and a manufacturing method thereof, wherein the steel lining stainless steel groove part comprises a steel outer shell, a steel lining and a stainless steel inner tube part; the stainless steel inner tube comprises a main inner tube and an auxiliary inner tube; tapered parts A are respectively arranged at the two end parts of the main inner pipe; the auxiliary inner tube comprises a flaring portion and a necking portion; the shrinkage part of the auxiliary inner tube is in interference fit with the two ends of the main inner tube; the steel lining is sleeved on the outer wall of the main inner pipe; two ends of the steel shell are also integrally connected with two groups of expansion connecting pipes through the shrinkage part B, and the expansion connecting pipes are expanded through the transition connecting pipes and the flaring parts of the auxiliary inner pipes to form expansion parts; the method sequentially comprises a supporting inner pipe installation process, a necking process, an expansion binding ring installation process, a flaring part forming process and a necking expansion process; the outer tube is sleeved outside the supporting inner tube, the two ends of the outer tube are subjected to necking, the outer tube necking part is sleeved with the binding ring, and the necking part is subjected to flaring through two flaring expansion sleeves, so that the local outer tube is flared, and the binding ring part generates a groove.
Description
Technical Field
The invention relates to a steel lining stainless steel groove part and a manufacturing method thereof, belonging to the field of pipe joints.
Background
For the joint of the multilayer composite pipe, since it is a multilayer pipe structure, if a joint groove is to be formed in the joint portion, it is generally molded by an extruder, but because of the multilayer structure, interference fit between the layers, if extrusion is performed, separation between the multilayer pipes easily occurs, unpredictable cracks or delamination gaps are generated between the multilayer pipes, and these gaps easily cause breakage of the multilayer pipes or erosion of corrosive liquid due to expansion with heat and contraction with cold, resulting in breakage of the entire multilayer pipe wall structure.
Disclosure of Invention
The invention aims to solve the technical problems that: the technical problems in the prior art are overcome, and a steel lining stainless steel groove part and a manufacturing method thereof are provided.
The technical scheme adopted for solving the technical problems is as follows:
a steel lined stainless steel channel member comprising a steel outer shell, a steel inner liner and a stainless steel inner tube portion; wherein the stainless steel inner tube comprises a main inner tube and an auxiliary inner tube; wherein, the two end parts of the main inner pipe are respectively turned and processed with a taper part A which is bent towards the middle part of the main inner pipe and has a circular arc-shaped section; the auxiliary inner tube comprises a flaring portion and a necking portion, and the flaring portion and the necking portion are smoothly transited through a transitional connecting pipe; wherein the shrinkage part of the auxiliary inner tube is in interference fit with the two ends of the main inner tube; the steel lining is sleeved on the outer wall of the main inner pipe, two axial ends of the steel lining are respectively provided with a bending edge bending towards the middle part of the steel lining, and the bending edges are coated on the necking part A; the steel lining is arranged in the middle of the steel shell, the outer wall of the steel lining is in interference fit with the middle of the steel shell, a tapered part B is arranged at the two end positions of the steel shell corresponding to the steel lining, and the inner wall surface of the tapered part B is coated on the bending edge of the steel lining; two ends of the steel shell are also integrally connected with two groups of expansion connecting pipes through the tapered part B, the expansion connecting pipes are expanded to form an expansion part through the transition connecting pipes and the flaring parts of the auxiliary inner pipes, and the expansion part is coated on the outer wall surfaces of the transition connecting pipes and the auxiliary inner pipes.
As a further improvement of the invention, the transition connecting pipe, the shrinking section and the expanding section of the auxiliary inner pipe are of an integrated structure, wherein the shrinking section and the transition connecting pipe are formed by extruding the expanding section, and the thicknesses of the shrinking section and the transition connecting pipe are larger than those of the expanding section.
As a further improvement of the invention, the end part of the necking part of the auxiliary inner pipe is also provided with a diversion surface with a flaring structure.
As a further improvement of the invention, a filling ring made of nylon is filled between the bent edge end part of the steel lining and the shrinking part of the auxiliary inner tube as well as between the bent edge end part of the steel lining and the inner wall of the steel shell, and the outer wall of the filling ring is of a tapered ring structure.
The manufacturing approach of a steel lining stainless steel groove, in order, support the inner tube installation process, necking down the procedure, expand and restraint the ring installation process, flaring portion shaping process and necking down the expansion process; the supporting inner pipe is pressed into the outer pipe, so that the outer pipe is reserved with necking allowance at two end parts of the supporting inner pipe; the necking process is to extrude the above-mentioned necking allowance through a shrinking machine so that the necking allowance becomes a necking part with a diameter smaller than that of the supporting inner pipe; the expansion binding ring is sleeved on the shrinkage part according to the outer diameter of the shrinkage part, so that the expansion binding ring is in interference fit with the outer wall of the shrinkage part; the flaring part forming process is that one ends of two expansion sleeves with the same diameter as the supporting inner tube are subjected to necking, so that the inner diameter of the supporting inner tube corresponds to the outer diameter of the necking end of the expansion sleeve; the expansion process of necking is to press the expansion sleeve into two necking parts of the outer tube, so that the necking ends of the expansion sleeve are in interference fit with the inner wall of the supporting inner tube, the necking part of the outer tube is expanded through a section with larger diameter of the expansion sleeve, and a groove is formed on the part of the outer tube bound by the expansion binding ring; finally, annealing the expansion beam ring and the groove, and cutting off the expansion beam ring
The beneficial effects of the invention are as follows:
1. according to the invention, the manufacturing structure and the process of the traditional multi-layer groove connecting piece are improved, the multi-layer pipe is replaced by the double-layer pipe and the multi-layer structure is formed by expansion at one time, and compared with the traditional structure, the combination compactness and the tightness between the inner pipe wall and the outer pipe wall are higher, so that the service life is not easily influenced by gaps in the manufacturing process.
2. The shrinkage part and the transition connecting pipe are manufactured by adopting an extrusion process instead of being formed by flaring the shrinkage part, so that the problems of damage and thinning of the pipe wall caused by extrusion expansion of the pipe are effectively reduced.
3. Compared with the section of the metal tube with a vertical structure, the flow resistance of the flow guide surface is lower, and the flow is not easy to accumulate or even block due to local resistance.
4. The filling ring made of nylon can fill gaps among the bent edge end part of the inner side of the steel, the shrinkage part of the auxiliary inner pipe and the inner wall of the steel shell, so that the problems of vibration noise of the pipe caused by the gaps and pipe breakage caused by expansion with heat and contraction with cold are reduced.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: 1. a steel housing; 2. a steel liner; 3. a main inner tube; 4. a tapered portion a; 5. bending the edge; 6. a tapered portion B; 7. a pinch portion; 8. a transition connecting pipe; 9. a flared portion; 10. an expansion section; 11. a filling ring; 12. a flow guiding surface; 13. and forming the hoop.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
The structure is as follows: as shown in fig. 1, the present invention is a steel lined stainless steel channel member comprising a steel outer shell 1, a steel inner liner 2 and a stainless steel inner tube portion; wherein the stainless steel inner tube comprises a main inner tube 3 and an auxiliary inner tube; wherein, the two end parts of the main inner tube 3 are respectively turned with a tapered part A4 which is bent towards the middle part of the main inner tube 3 and has a circular arc-shaped section; the auxiliary inner tube comprises a flaring part 9 and a necking part 7, the flaring part 9 and the necking part 7 are in smooth transition through a transition connecting tube 8, the necking part 7 and the flaring part 9 of the auxiliary inner tube are of an integrated structure, wherein the necking part 7 and the transition connecting tube 8 are formed by extruding the flaring part 9, and the thicknesses of the necking part 7 and the transition connecting tube 8 are larger than those of the flaring part 9; the shrinkage part 7 of the auxiliary inner pipe is in interference fit with the two end parts of the main inner pipe 3, and the end part of the shrinkage part 7 of the auxiliary inner pipe is also provided with a diversion surface 12 with a flaring structure; the steel lining 2 is sleeved on the outer wall of the main inner pipe 3, two axial ends of the steel lining 2 are respectively provided with a bending edge 5 bending towards the middle part of the steel lining 2, and the bending edges 5 are coated on the necking part 7A; the steel lining 2 is arranged in the middle of the steel shell 1, the outer wall of the steel lining 2 is in interference fit with the middle of the steel shell 1, the steel shell 1 is provided with a tapered part B6 corresponding to the two ends of the steel lining 2, and the inner wall surface of the tapered part B6 is coated on the bent edge 5 of the steel lining 2; two ends of the steel shell 1 are integrally connected with two groups of expansion connecting pipes through the shrinkage part 7B, the expansion connecting pipes are expanded through the transition connecting pipe 8 and the flaring part 9 of the auxiliary inner pipe to form an expansion part 10, and the expansion part 10 is coated on the outer wall surfaces of the transition connecting pipe 8 and the auxiliary inner pipe; a filling ring 11 made of nylon is filled between the end part of the bending edge 5 of the steel lining 2 and the necking part 7 of the auxiliary inner pipe as well as the inner wall of the steel shell 1, and the outer wall of the filling ring 11 is of a tapered ring structure.
The method comprises the following steps: the manufacturing approach of a steel lining stainless steel groove, in order, support the inner tube installation process, necking down the procedure, expand and restraint the ring installation process, flaring portion shaping process and necking down the expansion process; the supporting inner pipe is pressed into the outer pipe, so that the outer pipe is reserved with necking allowance at two end parts of the supporting inner pipe; the necking process is to extrude the above-mentioned necking allowance through a shrinking machine so that the necking allowance becomes a necking part with a diameter smaller than that of the supporting inner pipe; the expansion binding ring is sleeved on the shrinkage part according to the outer diameter of the shrinkage part, so that the expansion binding ring is in interference fit with the outer wall of the shrinkage part; the flaring part forming process is that one ends of two expansion sleeves with the same diameter as the supporting inner tube are subjected to necking, so that the inner diameter of the supporting inner tube corresponds to the outer diameter of the necking end of the expansion sleeve; the expansion process of necking is to press the expansion sleeve into two necking parts of the outer tube, so that the necking ends of the expansion sleeve are in interference fit with the inner wall of the supporting inner tube, the necking part of the outer tube is expanded through a section with larger diameter of the expansion sleeve, and a groove is formed on the part of the outer tube bound by the expansion binding ring; finally, annealing the expansion beam ring and the groove, and cutting off the expansion beam ring.
The manufacturing process with reference to fig. 1 and method is: during manufacturing, firstly, machining two end parts of a main inner pipe 3 by turning to obtain two tapered parts A4 with arc-shaped sections, then sleeving a steel inner liner 2 on the main inner pipe 3, enabling the main inner pipe 3 to be flush with two ends of the steel inner liner 2, and bending edges 5 at two ends of the steel inner liner 2 by extrusion equipment to enable the steel inner liner 2 to be coated on the main inner pipe 3; after that, the steel liner 2 is pressed into the inner wall of the steel shell 1 by a static press, and filled into the filling ring 11 and simultaneously extruded by a pipe shrinking machine, so that two necking parts 7B can be formed at the two ends of the steel shell 1, and simultaneously the filling ring 11 is fixed and a forming hoop is sleeved at the bottom end of the necking part 7B; and then, the auxiliary inner pipe is subjected to necking into a transitional connecting pipe 8 and a necking part 7 in transition through a necking machine, a diversion surface 12 is processed at the necking part 7 through a boring cutter, finally, the whole auxiliary inner pipe is pressed into two end parts of the steel shell 1 through an extruder, so that the necking part 7 is in interference fit with the main inner pipe 3, two ends of the steel shell 1 are expanded into an expansion part 10 through extrusion of a flaring part 9 of the auxiliary inner pipe, the inner wall of the expansion part 10 is tightly matched with the outer wall of the flaring part 9 of the auxiliary inner pipe, and a corresponding product can be obtained after a forming hoop 13 is cut off. The stainless steel pipe is not deeply processed by the structure, the pipe shrinking process is only performed, the stainless steel wall surface is not easy to damage, meanwhile, the groove of the structure is manufactured by adopting a plurality of forming processes, and compared with the traditional one-time extrusion, the groove of the structure has no simultaneous extrusion on the inner pipe and the outer pipe and no local separation on the inner pipe and the outer pipe caused by extrusion.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (1)
1. A steel lining stainless steel groove part is characterized in that: it comprises a steel outer shell, a steel inner liner and a stainless steel inner pipe part; wherein the stainless steel inner tube comprises a main inner tube and an auxiliary inner tube; wherein, the two end parts of the main inner pipe are respectively turned and processed with a taper part A which is bent towards the middle part of the main inner pipe and has a circular arc-shaped section; the auxiliary inner tube comprises a flaring portion and a necking portion, and the flaring portion and the necking portion are smoothly transited through a transitional connecting pipe; wherein the shrinkage part of the auxiliary inner tube is in interference fit with the two ends of the main inner tube; the steel lining is sleeved on the outer wall of the main inner pipe, two axial ends of the steel lining are respectively provided with a bending edge bending towards the middle part of the steel lining, and the bending edges are coated on the necking part A; the steel lining is arranged in the middle of the steel shell, the outer wall of the steel lining is in interference fit with the middle of the steel shell, a tapered part B is arranged at the two end positions of the steel shell corresponding to the steel lining, and the inner wall surface of the tapered part B is coated on the bending edge of the steel lining; two ends of the steel shell are also integrally connected with two groups of expansion connecting pipes through the tapered part B, the expansion connecting pipes are expanded through the transition connecting pipes and the flaring parts of the auxiliary inner pipes to form an expansion part, and the expansion part is coated on the outer wall surfaces of the transition connecting pipes and the auxiliary inner pipes;
the transition connecting pipe, the shrinkage part and the flaring part of the auxiliary inner pipe are of an integrated structure, wherein the shrinkage part and the transition connecting pipe are formed by extrusion of the flaring part, and the thickness of the shrinkage part and the transition connecting pipe is larger than that of the flaring part;
the end part of the necking part of the auxiliary inner pipe is also provided with a flow guide surface with a flaring structure;
a filling ring made of nylon is filled between the bent edge end part of the steel lining and the shrinkage part of the auxiliary inner pipe and the inner wall of the steel shell, and the outer wall of the filling ring is of a tapered ring structure;
the method also comprises the following manufacturing steps:
firstly, machining two end parts of a main inner pipe by turning to obtain two tapered parts A with arc-shaped sections, then connecting a steel inner liner to the main inner pipe, enabling the main inner pipe to be level with the two ends of the steel inner liner, and bending edges at the two ends of the steel inner liner by extrusion equipment to enable the steel inner liner to be coated on the main inner pipe;
pressing the steel lining into the inner wall of the steel shell through a static press, loading the steel lining into a filling ring, simultaneously extruding the two ends of the steel shell through a pipe shrinking machine, forming two tapered parts B at the two ends of the steel shell, simultaneously fixing the filling ring, and sleeving a forming hoop ring at the bottom end of the tapered parts B;
the auxiliary inner pipe is subjected to necking into a transitional connecting pipe and a necking part through a necking machine, a diversion surface is processed at the necking part through a boring cutter, the whole auxiliary inner pipe is pressed into two end parts of the steel shell through an extruder, the necking part is in interference fit with the main inner pipe, two ends of the steel shell are expanded into expansion parts through extrusion of the expansion parts of the auxiliary inner pipe, the inner wall of each expansion part is tightly matched with the outer wall of the corresponding flaring part of the auxiliary inner pipe, and a forming hoop is cut off, so that a product is obtained.
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| CN201810961765.XA CN108890235B (en) | 2018-08-22 | 2018-08-22 | Steel lining stainless steel groove part and manufacturing method thereof |
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| CN201810961765.XA CN108890235B (en) | 2018-08-22 | 2018-08-22 | Steel lining stainless steel groove part and manufacturing method thereof |
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| CN108890235B true CN108890235B (en) | 2023-05-05 |
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