CN212275544U - Testing device for composite pipe bonding force - Google Patents
Testing device for composite pipe bonding force Download PDFInfo
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- CN212275544U CN212275544U CN202020542189.8U CN202020542189U CN212275544U CN 212275544 U CN212275544 U CN 212275544U CN 202020542189 U CN202020542189 U CN 202020542189U CN 212275544 U CN212275544 U CN 212275544U
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Abstract
The utility model relates to a testing arrangement of compound tubular product cohesion belongs to compound tubular product capability test technical field. The testing device comprises a liner pipe pressing die and a base pipe pressing die, wherein the liner pipe pressing die and the base pipe pressing die are respectively provided with a liner pipe pressing piece and a base pipe pressing piece, and the positions of the liner pipe pressing piece and the base pipe pressing piece can be adjusted to adapt to different pipe diameters. The testing device can accurately test the binding force data, simplifies the testing steps, can realize the stepless regulation of the corresponding pipe diameters of the liner pipe pressing piece and the base pipe pressing piece, and can save the development cost and the raw material cost of the die.
Description
Technical Field
The utility model relates to a compound tubular product capability test technical field, concretely relates to testing arrangement of compound tubular product cohesion.
Background
The bimetal mechanical composite pipe is a pipe product which is formed by tightly combining two pipes together by changing the inner diameter and the outer diameter of an outer base pipe and an inner liner pipe through processes of spinning, hydraulic pressure, drawing and the like, and the bonding strength between the two pipes is an important performance index of the bimetal mechanical composite pipe, so that a bonding force test must be carried out on the combined pipes.
The preparation process of the test sample in the prior art comprises the following steps:
the method comprises the steps of intercepting a sample pipe with a certain length on a long pipe, then machining the sample pipe, turning an outer layer pipe at one end of the sample pipe to leave an inner layer pipe, and turning an inner layer pipe at the other end of the sample pipe to leave the outer layer pipe to form a sample piece. After the sample piece is prepared, the pressure is detected by pressing down the sample piece by using an electronic press, and then the binding force between the two layers of pipes is measured.
The existing test method has 4 defects:
1. cutting the sample tube, and then respectively carrying out inner and outer layer turning processing on two ends, wherein the inner and outer tube layers of the sample tube have torsion and radial stress phenomena due to turning torque and radial turning force, so that data deviation of a binding force test is caused;
2. vibration in the turning process causes changes of sample piece joint points and joint gaps, so that data deviation of a joint force test is caused;
3. due to ovality deviation and wall thickness deviation of the sample tube and the base tube, the inner layer or the outer layer of the sample tube cannot be accurately removed in the turning process, so that the profile of the sample tube is changed, and further later-period experimental data deviation is caused;
4. by adopting a turning method, the preparation period of the sample tube is long, and the efficiency of the binding force test is not high.
Therefore, an improved technical scheme exists in the prior art, and for example, the application publication number CN 110132839 a of the invention discloses a die and a method for testing the interface bonding strength of a base-clad pipe for a bimetal composite pipe, the die comprises an upper die plate and a lower die plate, the upper die plate and the lower die plate are connected through guide pillars in a guiding manner, an upper die base is mounted on the upper die plate, a punch cutter block is mounted on the upper die base, a lower die cutter edge is arranged in the lower die base, a stepped hole is formed in the center of the lower die cutter edge, the outer diameter of the punch cutter block is the same as the inner diameter of an outer pipe of the base-clad pipe, the inner diameter of a hole in the stepped hole in the lower die cutter edge is the same as the outer diameter of a punch cutter block matched with the hole, a cutter head of the punch cutter block can be replaced, the lower.
However, the improved technical solution has the following defects:
1. the testing mold can only test the binding force of the base-clad pipe with a series of fixed pipe diameters, and when the pipe diameter of the base-clad pipe is not within the aperture range of the stepped hole of the lower mold knife edge, the testing mold cannot be used for testing;
2. even if the diameter of the base-coated pipe is within the aperture range of the stepped hole, when the base-coated pipes with different diameters are tested, different cutter bits need to be replaced, the operation is still complicated, and the machining cost and the material cost of the testing die are increased due to the plurality of cutter bits;
3. the test die still needs to be provided with an independent pressurizing hydraulic device, and the use of the test die and a common pressurizing device is not considered, so that the cost of the die and the space occupied by the die are increased, and an additional power supply is needed for supplying power to the test die.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the application mainly aims at increasing the adaptability to different pipe diameters, saving the cost of a device, saving the space and the like, and develops a new binding force testing tool die and an experimental method matched with the same.
The utility model provides a technical scheme as follows of above-mentioned problem:
the testing device for the binding force of the composite pipe comprises:
the liner tube pressing die is acted on the end surface of the liner tube at one end of the composite pipe through a plurality of liner tube pressing pieces; the liner tube pressing part is provided with a liner tube pressing part acting on the end surface of the liner tube and a liner tube positioning part acting on the inner side wall of the liner tube; the liner tube pressing piece is movably arranged on the first adjusting piece;
the base pipe pressing die acts on the end face of the base pipe at the other end of the composite pipe through a plurality of base pipe pressing pieces; the base pipe pressing part is provided with a base pipe pressing part acting on the end surface of the base pipe and a base pipe positioning part acting on the outer side wall of the base pipe; the base pipe pressing piece is movably arranged on the second adjusting piece.
So-called liner pipes, i.e. pipes located inside in composite pipes; the base pipe is a pipe fitting located on the outer side in the composite pipe, and the base pipe is coated on the outer side surface of the liner pipe to form the composite pipe.
On first regulating part and second regulating part, bushing pipe casting die spare and base tube casting die spare can be adjusted respectively to be adapted to different bushing pipe internal diameters and base tube external diameter, promptly in certain extent, can realize bushing pipe casting die spare and base tube casting die spare and correspond the stepless regulation of pipe diameter, application scope is wide, need not to develop new mould to the compound tubular product of new pipe diameter.
The number of the liner pressing pieces and the base pipe pressing pieces is at least two, and the number of the liner pressing pieces and the base pipe pressing pieces can be multiple, so that the force exerted on the composite pipe tends to be uniform, the number of the first adjusting pieces is matched with that of the liner pressing pieces, and the number of the second adjusting pieces is matched with that of the base pipe pressing pieces.
During testing, only the liner tube pressing mold and the base tube pressing mold are required to be respectively arranged between two pressing surfaces of the press, the base tube pressing mold can be connected with the existing pressing equipment for use, an additional independent pressing device and an independent power supply are not required, and occupied space is saved.
When pressure is applied, the liner pressure is applied only to the end of the liner and not to the end of the substrate pipe, and the substrate pipe pressure is applied only to the end of the substrate pipe and not to the end of the liner.
As the optimization of the technical scheme, during testing, the plurality of pressure parts of the liner tube are uniformly distributed on the end surface of the liner tube at one end of the composite tube, and the plurality of pressure parts of the base tube are uniformly distributed on the end surface of the base tube at the other end of the composite tube.
The uniform distribution generally means that when the composite pipe is pressurized, the pressurizing part of the liner pipe takes the axis of the composite pipe as a symmetric axis, and the liner pipe is axially and symmetrically distributed on the end surface of the liner pipe; the base pipe pressure parts are distributed on the end surface of the base pipe in an axisymmetric manner by taking the axis of the composite pipe as a symmetry axis.
Preferably, in the above technical solution, the liner pressure section and the base pipe pressure section are both pressure-applying planes.
Preferably, in the above technical solution, the positioning contour of the liner pipe positioning portion is adapted to the contour of the inner side wall of the liner pipe, and the positioning contour of the base pipe positioning portion is adapted to the contour of the outer side wall of the base pipe.
The positioning contour of the liner pipe positioning part is the contour of the part of the liner pipe positioning part contacted with the inner side wall of the liner pipe, and the positioning contour of the base pipe positioning part is the contour of the part of the base pipe positioning part contacted with the outer side wall of the base pipe.
Preferably, the first adjusting member and the second adjusting member each include a screw, and the liner tube pressing member and the base tube pressing member are each provided with a screw hole adapted to a thread of the screw.
The screw rod is rotatably arranged on the liner tube pressing die and the base tube pressing die, and the positions of the liner tube pressing piece and the base tube pressing piece on the screw rod can be adjusted only by rotating the screw rod.
Preferably, the liner tube pressing member is provided with a base tube limiting part in the axial direction of the end surface of the base tube.
Preferably, the base pipe pressing member is provided with a liner pipe limiting part in the axial direction of the liner pipe end face.
The spacing portion of parent tube is used for spacing the parent tube after droing, and the spacing portion of bushing pipe is used for spacing the bushing pipe after droing, prevents that its impact force after droing from causing the harm of device and operating personnel's damage.
The method for testing the binding force of the composite pipe comprises the following steps:
preparing a sample tube: preparing a composite pipe sample pipe with two flush ends;
positioning adjustment: positioning liner tube positioning parts of a plurality of liner tube pressing parts and the inner wall of a liner tube at one end of the composite tube sample tube, and positioning base tube positioning parts of a plurality of base tube pressing parts and the outer wall of a base tube at the other end of the composite tube sample tube;
installing a die: placing a liner tube pressing mold and a base tube pressing mold between two pressing surfaces of a press;
pressure test: starting the press until the liner tube is separated from the base tube to obtain the data of the binding force;
the sequence among the first step, the second step and the third step can be changed randomly, and the test result of the test method is not influenced.
Preferably, in the second step, the plurality of liner tube pressure applying parts are uniformly distributed on the end surface of the liner tube at one end of the composite tube, and the plurality of base tube pressure applying parts are uniformly distributed on the end surface of the base tube at the other end of the composite tube.
Preferably, in the third step, the liner tube pressing mold and the base tube pressing mold are respectively and fixedly mounted on an upper anvil and a lower anvil of the press.
In summary, the embodiment of the present application has the following beneficial effects:
1) the testing arrangement of this application embodiment to current compound pipe binding force testing arrangement commonly used: the sample tube is not required to be turned, so that adverse effects on the binding force test result caused by turning are avoided, the step of turning is omitted, the step of testing the binding force is simplified, and the test period of the binding force test is shortened.
2) Compared with the prior art of improvement, the testing device of the application embodiment can realize stepless adjustment of the corresponding pipe diameters of the liner pipe pressing piece and the base pipe pressing piece within a certain range, does not need to replace a cutter head, simplifies the operation and has wider application range.
3) Furthermore, aiming at the composite pipe product with a new pipe diameter, a new die does not need to be developed, and the die development cost and the raw material cost are saved.
4) Furthermore, the testing device in the embodiment of the application can be connected with the existing pressurizing equipment for use, an additional independent pressurizing device and an independent power supply are not needed, and occupied space is saved.
5) Furthermore, the testing device provided by the embodiment of the application not only can be used for testing the bonding force of the bimetal mechanical composite pipe, but also can be applied to testing the bonding force of other composite pipes, such as metal-ceramic composite pipes.
Drawings
Fig. 1 is a schematic view of a fixing structure of a testing device according to an embodiment of the present application for different pipe diameters;
FIG. 2 is a schematic structural view of a first adjusting member or a second adjusting member according to an embodiment of the present disclosure;
FIG. 3 is an enlarged partial view of a substrate tube press element according to an embodiment of the present application;
FIG. 4 is a top view of a testing device according to an embodiment of the present disclosure.
In the figure, 1-liner tube pressing mould, 1-1-liner tube pressing piece, 1-1.1-liner tube pressing piece, 1-1.2-liner tube positioning part, 1-1.3-base tube limiting part, 1-2-first adjusting piece, 2-base tube pressing mould, 2-1-base tube pressing piece, 2-1.1-base tube pressing part, 2-1.2-base tube positioning part and 2-1.3-liner tube limiting part.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. The embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative work, belong to the protection scope of the present invention.
The present invention will be described in detail by way of examples with reference to the accompanying drawings.
Example (b): referring to fig. 1 and 2, the testing apparatus for a bimetal mechanical composite pipe is composed of a liner pipe pressure application mold 1 acting on the end surface of a liner pipe at one end of the composite pipe and a base pipe pressure application mold 2 acting on the end surface of a base pipe at the other end of the composite pipe, wherein one surfaces of the liner pipe pressure application mold 1 and the base pipe pressure application mold 2 are flat surfaces for being mounted on an anvil block of a press, and the other surface is provided with a pressure application structure for applying pressure to the composite pipe, and the pressure application structure is specifically described as follows:
the liner tube pressure test die 1 is provided with at least two movable liner tube pressing pieces 1-1, the moving mode can be a common moving mode in the prior art, such as a mode of linkage of an electric servo motor, a screw rod and the liner tube pressing pieces 1-1, a mode of linkage of manual screw rod matching and the liner tube pressing pieces 1-1 with threads and the like, the number of the liner tube pressing pieces 1-1 is preferably three or more, and during actual use, the liner tube pressing pieces 1-1 take the axis of a composite tube as a symmetrical axis and are symmetrically distributed on the end surface of the liner tube for pressing; in contrast, the base pipe pressing mold 2 is provided with at least two movable base pipe pressing members 2-1, and the moving mode can be a common moving mode in the prior art, such as a mode of linkage of an electric servo motor, a screw rod and the liner pipe pressing member 1-1, or a mode of linkage of a manual screw rod matching and the liner pipe pressing member 1-1 with threads, and the like. The number of the base pipe pressing pieces 2-1 is preferably three or more, and when the base pipe pressing pieces are actually used, the base pipe pressing pieces 2-1 are axially symmetrically distributed on the end face of the base pipe to press by taking the axis of the composite pipe as a symmetry axis.
Preferably, the liner tube pressing member 1-1 is adjusted in position by moving on the first adjusting member 1-2 to adapt to different liner tube inner diameters, the first adjusting member 1-2 is a screw rod which is screwed on the liner tube pressure test mold 1 and is simultaneously screwed on a screw hole of the corresponding liner tube pressing member 1-1, and the liner tube pressing member 1-1 can move back and forth by rotating the screw rod; correspondingly, the base pipe pressing piece 2-1 can be adjusted in position by moving on the second adjusting piece 2-2 to adapt to different base pipe outer diameters, the second adjusting piece 2-2 is also a screw rod which is in threaded connection with the base pipe pressing die 2, the screw rod is in threaded connection with a screw hole of the corresponding base pipe pressing piece 2-1, and the base pipe pressing piece 2-1 can be moved back and forth by rotating the screw rod.
The liner tube pressing piece 1-1 is provided with a liner tube pressing part 1-1.1 acting on the end surface of the liner tube and a liner tube positioning part 1-1.2 acting on the inner side wall of the liner tube, wherein the liner tube pressing part 1-1.1 is a plane, the positioning contour of the liner tube positioning part 1-1.2 is matched with the contour of the inner side wall of the liner tube, the liner tube pressing piece 1-1 is also provided with a base tube limiting part 1-1.3 in the axial direction of the end surface of the base tube, and the base tube limiting part 1-1.3 is also a plane and is used for limiting the fallen base tube; the base pipe pressing piece 2-1 is provided with a base pipe pressing portion 2-1.1 acting on the end face of the base pipe and a base pipe positioning portion 2-1.2 acting on the inner side wall of the base pipe, wherein the base pipe pressing portion 2-1.1 is a plane, the positioning contour of the base pipe positioning portion 2-1.2 is matched with the contour of the inner side wall of the liner pipe, the base pipe pressing piece 2-1 is further provided with a liner pipe limiting portion 2-1.3 in the axial direction of the end face of the liner pipe, and the liner pipe limiting portion 2-1.3 is also a plane and used for limiting the liner pipe after falling off.
The test method adopting the test device comprises the following steps:
preparing a sample tube: preparing a composite pipe sample pipe with two flush ends;
positioning adjustment: positioning liner tube positioning parts 1-1.2 of two liner tube pressing parts 1-1 and the inner wall of a liner tube at one end of a composite tube sample tube to ensure that liner tube pressing parts 1-1.1 are uniformly distributed at the end surface of the liner tube at one end of the composite tube, positioning base tube positioning parts 2-1.2 of two base tube pressing parts 2-1 and the outer wall of the base tube at the other end of the composite tube sample tube to ensure that base tube pressing parts 2-1.1 are uniformly distributed at the end surface of the base tube at the other end of the composite tube;
installing a die: placing a liner pipe pressure applying mold 1 and a base pipe pressure applying mold 2 on an upper anvil and a lower anvil of a press respectively;
pressure test: starting the press until the liner tube is separated from the base tube to obtain the data of the binding force;
in the second step, the number of the liner tube pressing pieces 1-1 and the base tube pressing pieces 2-1 is preferably three or more.
In the embodiment, the sequence among the first step, the second step and the third step can be changed randomly or performed simultaneously according to actual conditions, and the test result of the test method is not influenced.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. The testing arrangement of compound tubular product cohesion, its characterized in that contains:
the liner tube pressing die (1) acts on the end surface of the liner tube at one end of the composite pipe through a plurality of liner tube pressing pieces (1-1); the liner tube pressing piece (1-1) is provided with a liner tube pressing part (1-1.1) acting on the end surface of the liner tube and a liner tube positioning part (1-1.2) acting on the inner side wall of the liner tube; the liner tube pressing piece (1-1) is movably arranged on the first adjusting piece (1-2);
the base pipe pressing die (2) acts on the end face of the base pipe at the other end of the composite pipe through a plurality of base pipe pressing pieces (2-1); the base pipe pressing part (2-1) is provided with a base pipe pressing part (2-1.1) acting on the end surface of the base pipe and a base pipe positioning part (2-1.2) acting on the outer side wall of the base pipe; the base pipe pressing piece (2-1) is movably arranged on the second adjusting piece (2-2).
2. The device for testing the bonding force of the composite pipe according to claim 1, wherein: during testing, a plurality of the liner tube pressing parts (1-1.1) are uniformly distributed on the end face of the liner tube at one end of the composite pipe.
3. The testing device for the bonding force of the composite pipe according to claim 1 or 2, wherein: during testing, a plurality of base pipe pressure parts (2-1.1) are uniformly distributed on the end face of the base pipe at the other end of the composite pipe.
4. The device for testing the bonding force of the composite pipe according to claim 1, wherein: the pressure applying part (1-1.1) of the liner pipe and the pressure applying part (2-1.1) of the base pipe are both pressure applying planes.
5. The device for testing the bonding force of the composite pipe according to claim 1, wherein: the positioning contour of the liner tube positioning part (1-1.2) is matched with the contour of the inner side wall of the liner tube.
6. The device for testing the bonding force of the composite pipe according to claim 1 or 5, wherein: the positioning contour of the base pipe positioning part (2-1.2) is matched with the contour of the outer side wall of the base pipe.
7. The device for testing the bonding force of the composite pipe according to claim 1, wherein: the first adjusting piece (1-2) comprises a screw rod, and a screw hole matched with the screw thread of the screw rod is formed in the liner tube pressing piece (1-1).
8. The device for testing the bonding force of the composite pipe according to claim 1, wherein: the second adjusting piece (2-2) comprises a screw rod, and a screw hole matched with the screw thread of the screw rod is formed in the base pipe pressing piece (2-1).
9. The device for testing the bonding force of the composite pipe according to claim 1, wherein: the base pipe limiting part (1-1.3) is arranged on the liner pipe pressing part (1-1) in the axial direction of the end face of the base pipe.
10. The device for testing the bonding force of the composite pipe according to claim 1, wherein: the base pipe pressing piece (2-1) is provided with a liner pipe limiting part (2-1.3) in the axial direction of the end face of the liner pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020542189.8U CN212275544U (en) | 2020-04-14 | 2020-04-14 | Testing device for composite pipe bonding force |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020542189.8U CN212275544U (en) | 2020-04-14 | 2020-04-14 | Testing device for composite pipe bonding force |
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| CN212275544U true CN212275544U (en) | 2021-01-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351748A (en) * | 2020-04-14 | 2020-06-30 | 浙江天管久立特材有限公司 | Testing device and testing method for binding force of composite pipe |
| CN111351748B (en) * | 2020-04-14 | 2024-10-25 | 浙江天管久立特材有限公司 | Testing device and testing method for binding force of composite pipe |
-
2020
- 2020-04-14 CN CN202020542189.8U patent/CN212275544U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351748A (en) * | 2020-04-14 | 2020-06-30 | 浙江天管久立特材有限公司 | Testing device and testing method for binding force of composite pipe |
| CN111351748B (en) * | 2020-04-14 | 2024-10-25 | 浙江天管久立特材有限公司 | Testing device and testing method for binding force of composite pipe |
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Effective date of registration: 20220930 Address after: No.1-1, West Changsheng Bridge, Shuanglin Town, Nanxun District, Huzhou City, Zhejiang Province 313000 Patentee after: Zhejiang Jiuli Special Materials Technology Co.,Ltd. Huzhou Composite Pipe Branch Address before: 313000 No.1, West Changshengqiao, Shuanglin Town, Nanxun District, Huzhou City, Zhejiang Province Patentee before: ZHEJIANG TIANGUAN JIULI SPECIAL MATERIAL Co.,Ltd. |
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