CN111922217B - One-time expansion forming method of double-layer composite metal bent pipe - Google Patents
One-time expansion forming method of double-layer composite metal bent pipe Download PDFInfo
- Publication number
- CN111922217B CN111922217B CN202010952602.2A CN202010952602A CN111922217B CN 111922217 B CN111922217 B CN 111922217B CN 202010952602 A CN202010952602 A CN 202010952602A CN 111922217 B CN111922217 B CN 111922217B
- Authority
- CN
- China
- Prior art keywords
- lining pipe
- pipe
- cam
- lining
- locking plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 239000002184 metal Substances 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 15
- 230000007423 decrease Effects 0.000 claims description 2
- 230000002452 interceptive effect Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
-
- 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
- B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a one-time expansion forming method of a double-layer composite metal bent pipe, which is characterized by comprising the following steps of: s1: the method comprises the following steps that a lining pipe (3) with avoidance grooves (3.1) is placed into a bent pipe (1), the avoidance grooves (3.1) are provided with two positions, one avoidance groove (3.1) is arranged on the inner side of the bent part of the lining pipe (3), and the other avoidance groove (3.1) is arranged on the outer side of the bent part of the lining pipe (3); s2: placing the bent pipe (1) on a mould (2); s3: the avoidance groove (3.1) is eliminated through the mounting assembly, so that the lining pipe (3) is matched with the bent pipe (1). The invention provides a one-step expansion forming method of a double-layer composite metal bent pipe, which adopts a lining pipe with a large diameter to be placed in the bent pipe, can avoid the situation that the lining pipe is broken and can avoid the interference between the lining pipe and the bent pipe.
Description
Technical Field
The invention relates to the field of forming of lining pipes, in particular to a one-step expansion forming method of a double-layer composite metal bent pipe.
Background
The return bend is multi-purpose in the crooked junction of conveyer pipe of liquid raw materials such as chemical conveyer pipe bending part, drinking water conveyer pipe bending part, and its bending angle is great, generally adopts cast iron casting to form to the processing of spraying paint is in order to prevent the corrosion to the return bend, nevertheless can take place the lacquer layer after long-term the use and drop, the rusty condition still, causes the pollution to carrying the raw materials, and the harm is huge. Therefore, the problems are solved by adopting a method of 'bent pipe + lining pipe', namely a layer of stainless steel lining pipe is compounded on the inner wall of the cast iron bent pipe so as to avoid corrosion damage.
However, because the bending angle of the bent pipe is large, the traditional manufacturing method only can adopt a mode of inserting and welding the lining pipe after segmenting, the process has various working procedures and high production cost, and the welding part has the risk of leakage, thereby causing harm to the environment and the health of human bodies. Therefore, the problem can be effectively solved by adopting the lining pipe to be integrally formed, and the method has important significance for preventing the bent pipe from being rusted and leaking.
However, the difficulty of the integral forming process of the lining pipe is high, the lining pipe needs to be pre-bent so as to be placed into the bent pipe, and the stainless steel lining pipe is mostly made of thin-wall pipe, and the expansion amount is large, so that the fracture failure is easy to cause, therefore, the diameter of the lining pipe needs to be as large as possible, the expansion amount is as small as possible, but the large diameter of the lining pipe can interfere with the bent pipe when the lining pipe is placed into the bent pipe.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the one-step expansion forming method of the double-layer composite metal bent pipe can avoid the condition that the inner lining pipe is broken when the inner lining pipe with large diameter is placed into the bent pipe and can avoid the interference between the inner lining pipe and the bent pipe.
The technical scheme adopted by the invention for solving the problems is as follows: a one-time expansion forming method of a double-layer composite metal bent pipe is characterized by comprising the following steps:
s1: placing a lining pipe with avoidance grooves into the bent pipe, wherein the avoidance grooves are formed at two positions, one avoidance groove is formed in the inner side of the bend of the lining pipe, and the other avoidance groove is formed in the outer side of the bend of the lining pipe;
s2: placing the bent pipe on a mold;
s3: the avoidance groove is eliminated through the mounting assembly, so that the lining pipe is matched with the bent pipe.
Compared with the prior art, the invention has the advantages that: when the lining pipe is installed on the elbow pipe, the main interference positions of the lining pipe and the elbow pipe are located on the inner side of the elbow pipe and the outer side of the elbow pipe, the interference on the outer side mainly lies in the bending port position of the elbow pipe, the avoiding groove used for avoiding interference with the elbow pipe is formed in the lining pipe, the lining pipe can be smoothly installed in the elbow pipe, the elbow pipe and the lining pipe cannot be damaged, then the elbow pipe with the installed lining pipe is placed on a mold, then the avoiding groove in the lining pipe is eliminated through the installation assembly, the lining pipe is enabled to be restored to the shape matched with the elbow pipe, the nondestructive installation of the lining pipe is achieved, and the high efficiency of fluid transportation of the lining pipe is guaranteed.
As an improvement of the present invention, the mounting assembly includes a full-circle cam and a driving screw, the full-circle cam is fixedly connected to the driving screw, and the specific steps of S3 are as follows:
s31: the transmission lead screw moves towards the direction close to the lining pipe, the rounding cam rotates along the rotation direction and moves along the axis of the transmission lead screw under the driving of the transmission lead screw, and the contact avoidance groove is eliminated.
As an improvement of the present invention, the rounding cam is provided with a rounding portion for eliminating the avoidance groove and an insertion portion for inserting the rounding cam into the lining pipe and avoiding interference between the rounding cam and the avoidance groove, and the specific steps of S31 are as follows:
s311: when the avoiding groove is opposite to the embedding part, the full-circle cam starts to enter the lining pipe;
s312: in the whole round cam rotation process, the whole round part eliminates the avoiding groove, through the improvement, in the whole round cam forward movement process, the design of the embedding part can enable the whole round cam to smoothly enter the pipeline of the lining pipe without interfering with the avoiding groove, and after the whole round cam enters the lining pipe, the whole round part rotates to carry out whole round on the contacting avoiding groove to eliminate.
As an improvement of the present invention, the mounting assembly further includes an expansion ring, a water tank, and a fluid passage provided on an axis of the driving screw, the expansion ring is provided at one end of the driving screw near the full-circle cam, one end of the fluid passage is connected to the water tank, and the other end of the fluid passage is communicated with the lining pipe, and the specific steps after S31 are as follows:
s32: the expansion ring enters the inner part of the lining pipe and expands to seal the inside of the lining pipe;
s33: after two pipe orifices of the lining pipe are sealed, water is injected into the lining pipe through the fluid channel by the water tank, other avoiding grooves are eliminated through high pressure, the lining pipe is expanded to be attached to the bent pipe, through the improvement, the two expansion rings are respectively expanded at the two ports of the lining pipe to achieve the effect of sealing the two ports of the lining pipe, so that the lining pipe is sealed, then liquid is introduced into the lining pipe through the fluid channel on the transmission screw rod to be pressurized, the avoiding grooves which cannot be eliminated by the full-circle cam are eliminated, meanwhile, the lining pipe is expanded to eliminate the gap between the lining pipe and the bent pipe, and in the pressurizing process, the expansion rings can keep the expansion state and always keep the sealing effect with the end part of the lining pipe.
As an improvement of the present invention, the mounting assembly further includes a locking plate, the locking plate is disposed at an end of the transmission screw rod close to the full-circle cam, the locking plate is disposed at a side of the full-circle cam away from the lining pipe, the expansion ring is disposed between the full-circle cam and the locking plate, and the expansion step of the expansion ring in S32 is as follows:
s321: the locking plate is abutted against and fixed with the port of the lining pipe;
s322: the transmission screw rod rotates reversely to drive the rounding cam to move towards the direction far away from the lining pipe;
s323: the whole-circle cam and the locking plate are close to each other and extrude the expansion ring to expand the expansion ring, and through the improvement, the purpose that the expansion ring expands after lining the pipe is achieved.
As an improvement of the present invention, the mounting assembly further includes a baffle plate, the baffle plate is disposed above the locking plate, and the specific steps of S321 are as follows:
s3211: after the port of the locking plate and the inner lining pipe are offset, the baffle descends to abut against one side of the locking plate away from the inner lining pipe, and through the improvement, the purpose that the locking plate and the port of the inner lining pipe are offset and fixed is achieved, so that the purpose that the locking plate cannot move when the full-circle cam is close to the locking plate is achieved, the expansion ring is expanded, and the purpose that the port of the inner lining pipe is sealed by the expansion ring is achieved.
The baffle is fixedly connected to an electric cylinder, the electric cylinder is used for driving the baffle to move up and down, the bottom of the die is provided with a connecting groove used for being matched with the baffle, the baffle is provided with an interference preventing groove used for preventing interference with a transmission screw rod, the baffle can move up and down through the improvement, so that the aim of limiting the movement of the locking plate is fulfilled, meanwhile, the limiting capacity of the baffle on the locking plate can be guaranteed through the design of the connecting groove, and the phenomenon that the baffle deforms to influence the sealing effect is avoided.
As an improvement of the present invention, a sectional area of the avoidance groove provided on an outer side of the bend of the lining pipe is reduced from an end portion of the lining pipe toward a bend portion, and a shape of the avoidance groove provided on an inner side of the bend of the lining pipe is kept constant from one end portion of the lining pipe to the other end portion of the lining pipe.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is an exploded view of the elbow, lining tube and mold of the present invention.
Fig. 3 is a schematic view of the mounting assembly of the present invention.
Shown in the figure: 1. the device comprises a bent pipe, 2, a die, 2.1, a connecting groove, 3, an inner lining pipe, 3.1, an avoiding groove, 4, a full-circle cam, 4.1, a full-circle part, 4.2, an embedding part, 4.3, a bottom circle, 5, a transmission screw rod, 5.1, a gear, 5.2, a fluid channel, 6, an expansion ring, 7, a locking plate, 8, a baffle, 8.1, an interference preventing groove, 9, a water tank, 10, an electric cylinder, 11, a fixed base, 12, a movable base, 12.1, a supporting ring, 13, a rack, 14 and a pump.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1-2, a method for forming a double-layer composite metal elbow by one expansion includes a mold 2 for placing an elbow 1 and a mounting assembly for mounting an inner liner 3, wherein the inner liner 3 is provided with an avoiding groove 3.1 for avoiding interference with the elbow 1, the avoiding groove 3.1 is provided with two positions, one position of the avoiding groove 3.1 is arranged at the inner side of the inner liner 3, the other position of the avoiding groove 3.1 is arranged at the outer side of the inner liner 3, and the mounting assembly is used for eliminating the avoiding groove 3.1 to make the inner liner 3 fit with the elbow 1.
The mounting assembly is provided with two positions which are respectively arranged at two ports of the lining pipe 3.
As shown in fig. 1-3, the mounting assembly includes a rounding cam 4 and a transmission screw 5, the rounding cam 4 is fixedly connected to the transmission screw 5, a rounding portion 4.1 for eliminating the avoiding groove 3.1 and an embedding portion 4.2 for embedding the rounding cam 4 into the lining pipe 3 and avoiding interference between the rounding cam 4 and the avoiding groove 3.1 are provided on the rounding cam 4, a bottom circle 4.3 is further provided on one side of the rounding cam 4 close to the transmission screw 5, the bottom circle 4.3 and the rounding portion 4.1 are concentric and have the same radius, the joint of the avoiding groove 3.1 and the lining pipe 3 is arc-shaped, and the joint of the rounding portion 4.1 and the embedding portion 4.2 is arc-shaped.
As shown in fig. 2, the cross-sectional area of the avoiding groove 3.1 provided on the outer side of the bend of the lining tube 3 decreases from the end of the lining tube 3 toward the bend, the shape of the avoiding groove 3.1 provided on the inner side of the bend of the lining tube 3 is maintained from one end of the lining tube 3 to the other end of the lining tube 3, and the avoiding groove 3.1 provided on the outer side of the bend of the lining tube 3 is provided at two positions in total, each of which is provided with both ends of the lining tube 3.
As shown in fig. 1 and 3, the mounting assembly further includes an expansion ring 6, a locking plate 7, a baffle 8 and a water tank 9, the expansion ring 6 and the locking plate 7 are disposed at one end of the driving screw 5 on which the full-circle cam 4 is disposed, the locking plate 7 is disposed at one side of the full-circle cam 4 away from the lining pipe, the expansion ring 6 is disposed between the full-circle cam 4 and the locking plate 7, a fluid channel 5.2 is disposed on the axis of the driving screw 5, one end of the fluid channel 5.2 is connected to the water tank 9, the other end of the fluid channel 5.2 is communicated with the lining pipe 3, the baffle 8 is disposed above the orifice of the lining pipe 3, the baffle 8 is used for limiting the movement of the locking plate 7, the baffle 8 is fixedly connected to an electric cylinder 10, the electric cylinder 10 is used for driving the baffle 8 to move up and down, the bottom of the mold 2 is provided with a connecting groove 2.1 for matching with, the baffle 8 is provided with an interference preventing groove 8.1 for preventing interference with the transmission screw 5, the transmission screw 5 is connected to a fixed base 11 and a movable base 12 in a transmission way, the fixed base 11 is connected with the transmission screw 5 in a screw transmission way, the fixed base 11 is used for driving the transmission screw 5 to move along the axial direction of the transmission screw 5, the movable base 12 is provided with a rack 13 capable of moving up and down, the transmission screw 5 is provided with a gear 5.1 meshed with the rack 13, the movable base 12 and the transmission screw 5 move along the axial direction of the transmission screw 5 synchronously, the fixed base 11 is designed in the rotation process of the transmission screw 5, the purposes of rotation of the transmission screw 5 and the axial movement of the edge transmission screw 5 can be realized, the design of the movable base 12 can ensure that the rack 13 and the gear 5.1 are always in a meshing relation, and the rack 13 is driven by a motor to realize the upward movement, The purpose of the down movement.
The design of end circle 4.3 can continue to maintain liner tube 3 after 3 full circles of liner tube in full circle portion 4.1, dodges groove 3.1 and is the arcuation with the junction of liner tube 3 and is connected, full circle portion 4.1 is the arcuation with the junction of embedding portion 4.2 and is connected, rotates the in-process at full circle portion 4.1, makes and dodges groove 3.1 and is eliminated more easily, also can not have the damage to liner tube 3, and expansion ring 6 can also be avoided to expansion ring 4.3's design in the inflation in-process to the expansion of embedding portion 4.2 direction inflation to avoid the condition of expansion ring 6 deformation irregularity to appear, guarantee the sealed effect of expansion ring 6.
The locking plate 7 is rotatably connected to one end of the transmission screw rod 5 through a bearing, and meanwhile, the inner ring of the bearing is movably connected to the transmission screw rod 5 along the axis direction of the transmission screw rod 5, and the movable range is small and is used for compressing the expansion ring 6.
The mounting assembly further comprises another fixing base 11 which can enhance the stability and firmness of the transmission screw rod 5.
The two sides of the movable base 12 are respectively provided with a support ring 12.1, the support rings 12.1 are connected with the transmission screw rod 5 through bearings, meanwhile, the bearings are fixedly connected to the transmission screw rod 5 through interference fit, when the transmission screw rod 5 moves along the axial direction of the transmission screw rod 5, the bearings can be driven to move together, the purpose of moving the movable base 12 is achieved, the meshing relation between the rack 13 and the gear 5.1 is guaranteed, the movable base 12 is provided with an upper motor used for driving the rack 13 to move up and down, the rack 13 can move up and down through the driving of the motor, and the rotation of the transmission screw rod 5 is further achieved.
The water tank 9 is connected with the transmission screw rod 5 through a liquid pipeline, and a pump 14 is arranged in the liquid pipeline and used for conveying water in the water tank 9 into the lining pipe 3 to achieve the purpose of pressurizing the inside of the lining pipe 3.
Two sets of mounting assemblies, only one set for connection to the tank 9 and the other set for sealing the liner tube 3.
A one-time expansion forming method of a double-layer composite metal bent pipe comprises the following steps:
s1: placing the lining pipe 3 with the avoidance groove 3.1 into the bent pipe 1;
s2: placing the bent pipe 1 on a mould 2;
s3: the avoidance groove 3.1 is eliminated through the mounting assembly, so that the lining pipe 3 is matched with the bent pipe 1;
s31: the transmission screw rod 5 moves towards the direction close to the lining pipe 3, and the rounding cam 4 rotates and moves along the axis of the transmission screw rod 5 under the driving of the transmission screw rod 5, so that the contact avoidance groove 3.1 is eliminated;
s311: when the avoiding groove 3.1 is opposite to the embedding part 4.2, the rounding cam 4 starts to enter the lining pipe 3;
s312: in the rotating process of the rounding cam 4, the rounding part 4.1 eliminates the avoiding groove 3.1;
s32: the expansion ring 6 enters the inner part of the lining pipe 3 and expands to seal the inside of the lining pipe 3;
s321: the locking plate 7 is abutted against and fixed with the port of the lining pipe 3;
s3211: after the locking plate 7 abuts against the port of the lining pipe 3, the baffle plate 8 descends to abut against one side of the locking plate 7 away from the lining pipe 3;
s322: the transmission screw rod 5 rotates reversely to drive the rounding cam 4 to move towards the direction far away from the lining pipe 3;
s323: the full-circle cam 4 and the locking plate 7 are close to each other and extrude the expansion ring 6 to expand the expansion ring 6;
s33: after the two pipe orifices of the lining pipe 3 are sealed, the water tank 9 injects water into the lining pipe 3 through the fluid channel 5.2, the rest avoidance grooves 3.1 are eliminated through high pressure, and the lining pipe 3 is expanded to ensure that the lining pipe 3 is matched with the elbow pipe 1.
The above operation step S3 includes steps S31, S32, S33, step S31 includes steps S311, S312, step S32 includes steps S321, S322, S323, and step S321 includes step S3211.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (6)
1. A one-time expansion forming method of a double-layer composite metal bent pipe is characterized by comprising the following steps:
s1: the method comprises the following steps that a lining pipe (3) with avoidance grooves (3.1) is placed into a bent pipe (1), the avoidance grooves (3.1) are provided with two positions, one avoidance groove (3.1) is arranged on the inner side of the bent part of the lining pipe (3), and the other avoidance groove (3.1) is arranged on the outer side of the bent part of the lining pipe (3);
s2: placing the bent pipe (1) on a mould (2);
s3: the avoidance groove (3.1) is eliminated through the mounting assembly, so that the lining pipe (3) is matched with the bent pipe (1);
the mounting assembly comprises a full-circle cam (4) and a transmission screw rod (5), the full-circle cam (4) is fixedly connected to the transmission screw rod (5), S3 comprises the following specific steps,
s31: the transmission screw rod (5) moves towards the direction close to the lining pipe (3), and the rounding cam (4) rotates and moves along the axis of the transmission screw rod (5) under the drive of the transmission screw rod (5), so that the contact avoidance groove (3.1) is eliminated;
the rounding cam (4) is provided with a rounding part (4.1) for eliminating the avoidance groove (3.1) and an embedding part (4.2) for embedding the rounding cam (4) into the lining pipe (3) and avoiding the interference between the rounding cam (4) and the avoidance groove (3.1), and the specific steps of S31 are as follows,
s311: when the avoiding groove (3.1) is opposite to the embedding part (4.2), the rounding cam (4) starts to enter the lining pipe (3);
s312: in the rotating process of the rounding cam (4), the rounding part (4.1) eliminates the avoiding groove (3.1).
2. The one-time expanding forming method of the double-layer composite metal elbow pipe according to claim 1, wherein the mounting assembly further comprises an expansion ring (6), a water tank (9) and a fluid channel (5.2) arranged on the axis of the transmission screw rod (5), the expansion ring (6) is arranged at one end of the transmission screw rod (5) close to the rounding cam (4), one end of the fluid channel (5.2) is connected with the water tank (9), the other end of the fluid channel (5.2) is communicated with the lining pipe (3), and the specific steps after the step S31 are as follows:
s32: the expansion ring (6) enters the inner part of the lining pipe (3) and expands to seal the inside of the lining pipe (3);
s33: after the two pipe orifices of the lining pipe (3) are sealed, the water tank (9) injects water into the lining pipe (3) through the fluid channel (5.2), the rest avoidance grooves (3.1) are eliminated through high pressure, and the lining pipe (3) is expanded, so that the lining pipe (3) is attached to the elbow pipe (1).
3. The single expansion forming method of the double-layer composite metal bent pipe according to claim 2, wherein the mounting assembly further comprises a locking plate (7), the locking plate (7) is disposed at one end of the transmission screw (5) close to the full-circle cam (4), the locking plate (7) is disposed at one side of the full-circle cam (4) far away from the inner lining pipe (3), the expansion ring (6) is disposed between the full-circle cam (4) and the locking plate (7), and the expansion step of the expansion ring (6) in S32 is as follows:
s321: the locking plate (7) is abutted against and fixed with the port of the lining pipe (3);
s322: the transmission screw rod (5) rotates reversely to drive the rounding cam (4) to move towards the direction far away from the lining pipe (3);
s323: the full-circle cam (4) and the locking plate (7) are close to each other and extrude the expansion ring (6) to expand the expansion ring (6).
4. The method of claim 3, wherein the mounting assembly further comprises a baffle (8), the baffle (8) is disposed above the locking plate (7), and the step S321 is as follows:
s3211: after the locking plate (7) is abutted against the port of the lining pipe (3), the baffle (8) descends to abut against one side of the locking plate (7) far away from the lining pipe (3).
5. The one-step expansion forming method of the double-layer composite metal bent pipe according to claim 4, characterized in that: baffle (8) fixed connection is on an electric jar (10), electric jar (10) are used for driving baffle (8) upper and lower removal, the bottom of mould (2) be equipped with be used for with baffle (8) complex spread groove (2.1), be equipped with on baffle (8) and be used for preventing to take place the interference with transmission lead screw (5) prevent interfering groove (8.1).
6. The method of claim 1, wherein the cross-sectional area of the avoiding groove (3.1) provided outside the bend of the lining pipe (3) decreases from the end of the lining pipe (3) toward the bend, and the shape of the avoiding groove (3.1) provided inside the bend of the lining pipe (3) is maintained from one end of the lining pipe (3) to the other end of the lining pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952602.2A CN111922217B (en) | 2020-09-11 | 2020-09-11 | One-time expansion forming method of double-layer composite metal bent pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952602.2A CN111922217B (en) | 2020-09-11 | 2020-09-11 | One-time expansion forming method of double-layer composite metal bent pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111922217A CN111922217A (en) | 2020-11-13 |
| CN111922217B true CN111922217B (en) | 2020-12-15 |
Family
ID=73309302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010952602.2A Active CN111922217B (en) | 2020-09-11 | 2020-09-11 | One-time expansion forming method of double-layer composite metal bent pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111922217B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4095594A (en) * | 1977-02-15 | 1978-06-20 | Institut Electrosvarki Imeni E.O. Patona Akademii Nauk Ukrainskoi Ssr | Method of manufacturing laminated shells |
| CN1186921A (en) * | 1996-12-30 | 1998-07-08 | 俞家正 | Metal composite pipe and making method and pipe joint structure |
| DE10357344A1 (en) * | 2003-12-09 | 2005-07-14 | Daimlerchrysler Ag | Air gap insulated exhaust pipe, and method for its production |
| CN201354913Y (en) * | 2008-10-20 | 2009-12-02 | 天津天铁冶金集团有限公司 | Novel wear resisting elbow |
| CN202992496U (en) * | 2013-01-07 | 2013-06-12 | 北京东鑫顺通耐磨技术有限公司 | Duplex metal composite elbow |
| DE102014108145A1 (en) * | 2014-06-10 | 2015-12-17 | EISENBAU KRäMER GMBH | Method for producing a multi-layered large pipe |
| CN204042296U (en) * | 2014-08-29 | 2014-12-24 | 江苏新澎复合材料有限公司 | A kind of integral lining corrosion resisting alloy composite elbow |
| CN106363070B (en) * | 2016-08-25 | 2018-08-17 | 宁波市沃瑞斯机械科技有限公司 | A kind of processing technology of metal bi multiple tube |
| CN208778879U (en) * | 2018-08-22 | 2019-04-23 | 江苏众信绿色管业科技有限公司 | A kind of Covered with Angles inner liner stainless steel composite pipe |
| CN111360129A (en) * | 2020-04-14 | 2020-07-03 | 浙江天管久立特材有限公司 | Preparation process of composite pipe formed by external mold limiting type hydraulic expanding |
-
2020
- 2020-09-11 CN CN202010952602.2A patent/CN111922217B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111922217A (en) | 2020-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102764808B (en) | Hydraulic forming device and method of reducing cylindrical part | |
| CN101537447B (en) | Pipe liquid filled shear bending and forming method | |
| CN101559447B (en) | Thin wall pipe connector and processing method thereof | |
| CN100471616C (en) | Method for processing thin wall metal elbow | |
| CN115780626A (en) | Straight edge expanding die for end part of corrugated pipe for storage tank and forming method | |
| CN111922217B (en) | One-time expansion forming method of double-layer composite metal bent pipe | |
| CN111922172B (en) | Forming device for double-layer composite metal bent pipe | |
| JP2005000951A (en) | Hydraulic bulging method and device, and bulge article | |
| CN103240324A (en) | Liquid-expansion forming system for bimetal composite pipe | |
| CN111237552A (en) | End face and port double-enhancement double-sealing device of metal plastic composite pipe and manufacturing method thereof | |
| CN216175901U (en) | Electromagnetic forming die for concave corrugation of thin-wall metal pipe fitting | |
| CN1047990A (en) | Pipe Joint Cold Extrusion Forming Process | |
| CN212319080U (en) | A installation mechanism for pipeline | |
| CN2186123Y (en) | Device for manufacturing compound tube by hydraulic expanding join | |
| CN115178638A (en) | Auxiliary heating extrusion forming device and process for prefabricated three-way joint | |
| CN209910906U (en) | Leakage detection device for side cover valve body | |
| CN110788195A (en) | Stainless steel clamping and pressing pipe fitting forming process | |
| CN113369816A (en) | Production method of composite steel pipe with plastic-coated outer layer and stainless steel lining | |
| CN110039761A (en) | A kind of pipeline winding coating machine and its winding film plating process | |
| CN213728846U (en) | Pipe forming device | |
| CN2179515Y (en) | Plastic steel compound pipe having dging steel pipe cooperated with flange | |
| CN111495996B (en) | Liquid-filling drawing device and method for miniature thin-wall metal pipe | |
| CN111346979A (en) | Flaring-free guide pipe rolling connection device and method | |
| CN219655528U (en) | Stainless steel pipe extension edge connection structure | |
| CN216095979U (en) | Electromagnetic forming die for convex corrugations of thin-wall metal pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |