CN109916707B - Thin-walled pipe bending and unfolding integrated test device and method - Google Patents
Thin-walled pipe bending and unfolding integrated test device and method Download PDFInfo
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- CN109916707B CN109916707B CN201910211637.8A CN201910211637A CN109916707B CN 109916707 B CN109916707 B CN 109916707B CN 201910211637 A CN201910211637 A CN 201910211637A CN 109916707 B CN109916707 B CN 109916707B
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Abstract
The invention discloses a thin-walled tube bending and stretching integrated test device and a method, which relate to the technical test field of mechanical engineering and comprise a flattening mechanism, a bending mechanism and a sensor; the flattening mechanism comprises a pressing plate, a bearing plate, a screw rod mechanism and a transmission mechanism, the transmission mechanism is fixedly arranged on the right side of the bearing plate, and the pressing plate is movably arranged on the left side of the bearing plate through the screw rod mechanism; the number of the flattening mechanisms is more than or equal to 2, and the upper end and the lower end between every two adjacent flattening mechanisms are respectively provided with the bending mechanism; the bending mechanism comprises a first connecting plate, a second connecting plate, a rotating shaft and a bending transmission mechanism; the sensor comprises a pressure sensor and a torque sensor. The integrated test device disclosed by the invention is simple in structure and convenient to use and maintain, can realize continuous tests of flattening, bending, folding and unfolding of large-diameter thin-wall bean pod rods and thin-wall circular tubes, and records mechanical state parameters in the whole test process.
Description
Technical Field
The invention relates to the technical field of mechanical engineering tests, in particular to a thin-walled tube bending and stretching integrated test device and method.
Background
The space expandable structure is a widely applied structural system of a large-scale spacecraft, a mechanical hinge system is mainly adopted in the prior art and is mainly driven by a motor, but the mechanical hinge system has the defects of complex mechanism, heavy weight and low expansion reliability. With the development of material science and technology, a space deployable structure based on the integration of a material mechanism structure becomes a research hotspot and development trend, the material high-performance composite material is adopted, and through the elasticity or shape memory of the material, the material is folded on the ground and is launched into a rail, and then the elastic energy or the thermal memory is released to store energy, so that the rail deployment is realized. For such a space-expandable structure, sufficient mechanical test research and technical verification for expansion and folding need to be performed in advance.
The 'winding rib winding process test and mechanical behavior analysis' of Lerui male et al discloses a test device for extruding hyacinth bean pod rods and winding by a winding drum and a rod shaft, and belongs to non-uniform flattening; the device and test for large-deformation pure bending test of thin plate and thin rod, Zhang Jinlong et al, discloses a device capable of realizing pure bending and large corner of thin plate or thin rod; "flattening and flattening numerical simulation and test of lens type thin-wall tubular space extending arm", Chua Qiyan et al, discloses a flattening or flattening test of pod rods, which realizes parallel and uniform flattening by a uniaxial tension-compression testing machine in cooperation with a bearing plate.
"A Simple Test Method for Large Forming Bending of Thin High Strain Composite Flexers" by Juan M.Fernandez et al discloses a four-point Bending Test device and a balance weight Test Bending device, which can realize Large Bending Test of Thin sheet
The prior art discloses a test piece which needs small-size bending deformation, and the test piece can be realized by adopting a four-point bending form testing machine; the test pieces such as thin sheets and thin rods which need to be bent in a large deformation mode can be achieved through a design tool or a tool combined testing machine, but the technology for continuously flattening and bending the workpieces with complex geometric sections and large sizes and recording process data is not disclosed.
Therefore, those skilled in the art are devoted to developing a thin-wall pipe bending and stretching integrated test device and method. By the test device and the test method, continuous tests of flattening, bending, folding and unfolding of the large-diameter thin-wall bean pod rod and the thin-wall circular tube and continuous tests of shape memory and recovery of flattening, bending, folding and unfolding of the thin-wall tube can be realized, and mechanical state parameters of the members in the flattening, folding and unfolding processes can be effectively measured.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the technical problem to be solved by the invention is how to realize continuous tests for carrying out flattening, bending, folding and unfolding on large-diameter thin-wall bean pod rods and thin-wall round tubes, and continuous tests for carrying out shape memory and recovery of flattening, bending, folding and unfolding on thin-wall tubes, and the problem that the mechanical state parameters of the members in the flattening, folding and unfolding processes can be effectively measured.
In order to achieve the purpose, the invention provides a thin-walled tube bending and stretching integrated test device, which comprises a flattening mechanism, a bending mechanism and a sensor, wherein the flattening mechanism is arranged on the bending mechanism; the flattening mechanism comprises a pressing plate, a bearing plate, a screw rod mechanism and a transmission mechanism, the transmission mechanism is fixedly arranged on the right side of the bearing plate, and the pressing plate is movably arranged on the left side of the bearing plate through the screw rod mechanism; the screw rod mechanism comprises a screw rod and a screw rod nut, the screw rod is fixedly arranged on the pressing plate, the screw rod nut and the bearing plate form a rotating pair, and the screw rod penetrates through the bearing plate through the screw rod nut; the lead screw nut and the lead screw form a ball screw transmission pair or a roller screw transmission pair; the number of the flattening mechanisms is more than or equal to 2, each flattening mechanism is arranged side by side in sequence, and the upper end and the lower end between every two adjacent flattening mechanisms are respectively provided with the bending mechanism; the bending mechanism comprises a first connecting plate, a second connecting plate, a rotating shaft and a bending transmission mechanism, the first connecting plate is fixedly connected with the bearing plate of the flattening mechanism on the left side, and the second connecting plate is fixedly connected with the bearing plate of the flattening mechanism on the right side; the rotating shaft and the first connecting plate form a rotating pair, the rotating shaft is fixedly connected with the second connecting plate, and the rotating shafts of the bending mechanisms at the upper end and the lower end between two adjacent flattening mechanisms are coaxial; the sensors comprise a pressure sensor and a torque sensor; the pressure sensor is arranged on the flattening mechanism, and the torque sensor is arranged on the bending mechanism.
Further, the flattening mechanism further comprises a backing plate, the backing plate is a flat plate, the backing plate is arranged between the pressing plate and the bearing plate, and the backing plate is fixedly installed on the left side of the bearing plate.
Further, the right side of the pressure plate is provided with a groove in which the backing plate can be embedded.
Furthermore, the upper end and the lower end of the inlet side and the outlet side of the flattening mechanism are respectively provided with the screw rod mechanism, the central line of the screw rod is vertical to the base plate, and the central lines of the screw rods are parallel to each other.
Further, the transmission mechanism comprises a clamping motor, a first bevel gear, a second bevel gear, a transmission shaft, a support seat, a third bevel gear, a fourth bevel gear, a fifth bevel gear and a sixth bevel gear, the first bevel gear is fixedly arranged on an output shaft of the clamping motor, the second bevel gear is fixedly arranged in the middle of the transmission shaft, the third bevel gear is fixedly arranged at the upper end of the transmission shaft, the fourth bevel gear is fixedly arranged at the lower end of the transmission shaft, the fifth bevel gear is fixedly arranged at the end part of the screw rod nut of the screw rod mechanism arranged at the upper end, the sixth bevel gear is fixedly arranged at the end part of the screw rod nut of the screw rod mechanism arranged at the lower end, the first bevel gear and the second bevel gear form bevel gear transmission, and the third bevel gear and the fifth bevel gear form bevel gear transmission, the fourth bevel gear and the sixth bevel gear form bevel gear transmission, the supporting seat is fixedly installed on the right side face of the bearing plate, the supporting seat and the transmission shaft form a rotating pair, and the clamping motor is fixedly installed on the right side of the bearing plate.
Furthermore, the inlet side and the outlet side of the flattening mechanism are respectively provided with one transmission mechanism.
Further, the flattening mechanism also comprises universal wheels, the universal wheels are fixedly installed at the lower ends of the pressing plate and the bearing plate, the number of the universal wheels at the lower end of the pressing plate is more than or equal to 2, and the number of the universal wheels at the lower end of the bearing plate is more than or equal to 2.
Further, the bending transmission mechanism comprises a bending motor, a first gear and a second gear, the first gear is fixedly connected with an output shaft of the bending motor, the second gear is fixedly connected with one end of the rotating shaft, the first gear and the second gear form a gear transmission pair, the bending motor is fixedly installed on the first connecting plate, and the bending motors of the bending mechanisms at the upper end and the lower end between every two adjacent flattening mechanisms are symmetrically arranged.
Further, the torque sensor is arranged at the other end of the rotating shaft, and the pressure sensor is arranged between the backing plate and the bearing plate.
A method for adopting the thin-walled tube bending and stretching integrated test device comprises the following steps:
the method comprises the following steps: arranging the thin-walled tube bending and spreading integrated test device on a smooth and horizontal plane;
step two: debugging and calibrating the clamping motor, the bending motor and the sensor of the integrated test device;
step three: clamping a test piece between the pressing plate and the base plate of the flattening mechanism, and pre-pressing by the clamping motor;
step four: synchronously controlling the clamping motors of the flattening mechanisms, and keeping the adjacent flattening mechanisms to flatten the test piece synchronously until the clamping motors stop after the test piece reaches a test design state;
step five: the bending motors between the adjacent flattening mechanisms are synchronously controlled to drive the two adjacent groups of flattening mechanisms to rotate around the rotating shaft, so that the flattened test piece is bent; recording the mechanical state parameters of clamping and bending of the test piece from the third step to the fifth step through the sensor;
step six: and determining the resilience mechanical state parameters of the test piece according to the reverse sequence of the third step to the fifth step.
Compared with the prior art, the implementation of the invention has at least the following beneficial technical effects:
1: the thin-wall pipe bending and unfolding integrated test device and the thin-wall pipe bending and unfolding integrated test method provided by the invention can realize continuous tests of flattening, bending, folding and unfolding of large-diameter thin-wall bean pod rods and thin-wall circular pipes, and record mechanical state parameters in the whole test process;
2: the thin-walled tube bending and unfolding integrated test device and the thin-walled tube bending and unfolding integrated test method can realize continuous tests of shape memory and recovery of flattening, bending, folding and unfolding of the thin-walled tube, and record mechanical state parameters in the whole test process;
3: the thin-walled tube bending and stretching integrated test device provided by the invention is simple in structure and convenient to use and maintain.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is an assembled view of a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the drive mechanism for the collapsing mechanism according to a preferred embodiment of the invention;
FIG. 3 is a schematic diagram of a pressure sensor arrangement in accordance with a preferred embodiment of the present invention;
FIG. 4 is an assembled view of the bending mechanism of a preferred embodiment of the present invention;
FIG. 5 is a schematic view of an initial bending state of a preferred embodiment of the present invention;
FIG. 6 is a schematic view of a bend intermediate state of a preferred embodiment of the invention;
fig. 7 is a schematic view of a 180 ° bent state according to a preferred embodiment of the present invention.
The device comprises a flattening mechanism 1, a universal wheel 11, a pressing plate 12, a screw rod 13, a bearing plate 14, a transmission mechanism 15, a sixth bevel gear 151, a fourth bevel gear 152, a supporting seat 153, a second bevel gear 154, a transmission shaft 155, a fifth bevel gear 156, a third bevel gear 157, a first bevel gear 158, a clamping motor 159, a 2-bending mechanism 21, a bending motor 22, a first connecting plate 23, a second gear 23, a rotating shaft 24, a second connecting plate 25, a test piece 3, a pressure sensor 41 and a torque sensor 42.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings for clarity and understanding of technical contents. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
Example 1:
as shown in fig. 1, the thin-walled tube bending and stretching integrated test device provided by this embodiment includes a flattening mechanism 1, a bending mechanism 2, and a sensor; the flattening mechanism 1 comprises a pressing plate 12, a bearing plate 14, a screw rod mechanism 13, a transmission mechanism 15 and a backing plate, wherein the bearing plate 14 is an L-shaped component, the transmission mechanism 15 is fixedly arranged on the right side of the bearing plate 14, and the pressing plate 12 is movably arranged on the left side of the bearing plate 14 through the screw rod mechanism 13; the screw mechanism 13 comprises a screw and a screw nut, the screw is fixedly arranged on the pressing plate 12, the screw nut and the bearing plate 14 form a rotating pair, and the screw passes through the bearing plate 14 through the screw nut; the screw nut and the screw form a ball screw transmission pair or a roller screw transmission pair, and the ball screw transmission pair is preferred in the embodiment; the cushion plate is a flat plate and is arranged between the pressing plate 12 and the bearing plate 14, the cushion plate is fixedly arranged on the left side of the bearing plate 14, and the right side of the pressing plate 12 is provided with a groove in which the cushion plate can be embedded; the test piece 3 is clamped between the groove on the right side of the pressure plate 12 and the base plate; the sensors comprise a pressure sensor 41 and a torque sensor 42, as shown in fig. 3, each of the flattening mechanisms 1 is provided with 2 pressure sensors 41, and the pressure sensors 41 are arranged between the backing plate and the carrier plate 14; the upper end and the lower end of the inlet side and the outlet side of the flattening mechanism 1 are respectively provided with a screw rod mechanism 13, the central lines of the screw rods of the four screw rod mechanisms 13 are all vertical to the backing plate, and the central lines of the screw rods are parallel to each other; the centers of circles of the end surfaces of the lead screws at the upper end and the lower end of the inlet side of the flattening mechanism 1 are on the same plumb line, and the centers of circles of the end surfaces of the lead screws at the upper end and the lower end of the outlet side of the flattening mechanism 1 are on the same plumb line.
As shown in fig. 2, the inlet side and the outlet side of the crushing mechanism 1 are respectively provided with a transmission mechanism 15, the transmission mechanism 15 comprises a clamping motor 159, a first bevel gear 158, a second bevel gear 154, a transmission shaft 155, a support seat 153, a third bevel gear 157, a fourth bevel gear 152, a fifth bevel gear 156 and a sixth bevel gear 151, the first bevel gear 158 is fixedly arranged on an output shaft of the clamping motor 159, the second bevel gear 154 is fixedly arranged on the middle part of the transmission shaft 155, the third bevel gear 157 is fixedly arranged on the upper end part of the transmission shaft 155, the fourth bevel gear 152 is fixedly arranged on the lower end part of the transmission shaft 155, the fifth bevel gear 156 is fixedly arranged on the end part of a screw nut of the screw mechanism 13 arranged at the upper end, the sixth bevel gear 151 is fixedly arranged on the end part of a screw nut of the screw mechanism 13 arranged at the lower end, the first bevel gear 158 and the second bevel gear 154 form a bevel gear transmission, the third bevel gear 157 and the fifth bevel gear 156 form bevel gear transmission, the fourth bevel gear 152 and the sixth bevel gear 151 form bevel gear transmission, the support seats 153 are fixedly installed on the right side surface of the bearing plate 14, the number of the support seats 153 is 2, the two support seats 153 are respectively arranged on two sides of the second bevel gear 154, the support seats 153 and the transmission shaft 155 form a rotating pair, and the clamping motor 159 is fixedly installed on the right side of the bearing plate 14; the modulus, pressure angle, number of teeth and indexing taper angle of the large ends of the third bevel gear 157 and the fourth bevel gear 152 are equal; the modulus, pressure angle, number of teeth, and indexing taper angle of the large ends of the fifth and sixth bevel gears 156 and 151 are equal; a through hole for the screw rod to pass through is arranged between the fifth bevel gear 156 and the sixth bevel gear 151.
The thin-walled tube bending and stretching integrated test device comprises two flattening mechanisms 1, wherein the two flattening mechanisms 1 are sequentially arranged horizontally side by side, and the upper end and the lower end between every two adjacent flattening mechanisms 1 are respectively provided with a bending mechanism 2; as shown in fig. 4, the bending mechanism 2 includes a first connecting plate 22, a second connecting plate 25, a rotating shaft 24, and a bending transmission mechanism, the bending transmission mechanism includes a bending motor 21, a first gear (not shown in the figure) and a second gear 23, the first gear is fixedly connected with an output shaft of the bending motor 21, the second gear 23 is fixedly connected with one end of the rotating shaft 24, the first gear and the second gear 23 form a gear transmission pair, and the bending motor 21 is fixedly mounted on the first connecting plate 22; first connecting plate 22 is fixedly connected with carrier plate 14 of the left-side flattening mechanism 1, and second connecting plate 25 is fixedly connected with carrier plate 14 of the right-side flattening mechanism 1; the rotating shaft 24 and the first connecting plate 22 form a rotating pair, the rotating shaft 24 is fixedly connected with the second connecting plate 25, the rotating shafts 24 of the bending mechanisms 2 at the upper end and the lower end between two adjacent flattening mechanisms 1 are coaxial, and the bending motors 21 of the bending mechanisms 2 at the upper end and the lower end are symmetrically arranged; the torque sensor 42 is provided at the other end of the rotating shaft 24.
The flattening mechanism 1 further comprises universal wheels 11, the universal wheels 11 are fixedly arranged at the lower ends of the pressing plate 12 and the bearing plate 14, 2 universal wheels 11 are uniformly arranged at the lower end of the pressing plate 12, and 4 universal wheels 11 are uniformly arranged at the lower end of the bearing plate 14; each universal wheel 11 has two working states of braking locking and free rotation.
The method for adopting the thin-walled tube bending and stretching integrated test device comprises the following steps:
the method comprises the following steps: the thin-walled tube bending and stretching integrated test device is arranged on a smooth and horizontal plane;
step two: debugging and calibrating a clamping motor 159, a bending motor 21 and various sensors of the integrated test device;
step three: clamping the test piece 3 between the pressing plate 12 and the backing plate of each flattening mechanism 1, and pre-pressing by a clamping motor 159 to ensure that the test piece 3 does not fall off; as shown in fig. 5;
step four: synchronously controlling a clamping motor 159 of the flattening mechanisms 1, and keeping the adjacent flattening mechanisms 1 to flatten the test piece 3 synchronously until the clamping motor 159 stops after the test piece 3 reaches a test design state;
step five: synchronously controlling a bending motor 21 between two adjacent flattening mechanisms 1, and driving two adjacent groups of flattening mechanisms 1 to rotate around a rotating shaft 24, thereby realizing the bending of the flattened test piece 3; recording all mechanical state parameters of clamping and bending of the test piece 3 in the third step to the fifth step through a sensor; as shown in fig. 6 and 7;
step six: and (4) measuring the resilience mechanical state parameters of the test piece 3 according to the reverse sequence of the third step to the fifth step.
Example 2:
on the basis of embodiment 1, the sensor further includes a displacement sensor configured to detect a relative distance between the pressing plate 12 and the backing plate, and the displacement sensor may be disposed between the pressing plate 12 and the backing plate or on the lead screw, and the present embodiment is preferably that the displacement sensor is disposed on the lead screw.
Example 3:
on the basis of embodiment 1, the number of the flattening mechanisms 1 is 3, and the 3 flattening mechanisms 1 are arranged side by side at the left, middle and right.
Example 4:
on the basis of embodiment 1, the rotating shafts 24 of the bending mechanisms 2 respectively arranged at the upper end and the lower end between two adjacent flattening mechanisms 1 are coaxially and fixedly connected, and the two bending mechanisms 2 share one bending motor 21.
It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A thin-walled tube bending and stretching integrated test device is characterized by comprising a flattening mechanism, a bending mechanism and a sensor; the flattening mechanism comprises a pressing plate, a bearing plate, a screw rod mechanism and a transmission mechanism, the transmission mechanism is fixedly arranged on the right side of the bearing plate, and the pressing plate is movably arranged on the left side of the bearing plate through the screw rod mechanism; the screw rod mechanism comprises a screw rod and a screw rod nut, the screw rod is fixedly arranged on the pressing plate, the screw rod nut and the bearing plate form a rotating pair, and the screw rod penetrates through the bearing plate through the screw rod nut; the lead screw nut and the lead screw form a ball screw transmission pair or a roller screw transmission pair; the number of the flattening mechanisms is more than or equal to 2, each flattening mechanism is arranged side by side in sequence, and the upper end and the lower end between every two adjacent flattening mechanisms are respectively provided with the bending mechanism; the bending mechanism comprises a first connecting plate, a second connecting plate, a rotating shaft and a bending transmission mechanism, the first connecting plate is fixedly connected with the bearing plate of the flattening mechanism on the left side, and the second connecting plate is fixedly connected with the bearing plate of the flattening mechanism on the right side; the rotating shaft and the first connecting plate form a rotating pair, the rotating shaft is fixedly connected with the second connecting plate, and the rotating shafts of the bending mechanisms at the upper end and the lower end between two adjacent flattening mechanisms are coaxial; the sensors comprise a pressure sensor and a torque sensor; the pressure sensor is arranged on the flattening mechanism, and the torque sensor is arranged on the bending mechanism.
2. The thin-walled tube bending and spreading integrated test device according to claim 1, wherein the flattening mechanism further comprises a backing plate, the backing plate is a flat plate, the backing plate is arranged between the pressing plate and the bearing plate, and the backing plate is fixedly installed on the left side of the bearing plate.
3. The thin-walled tube bending and spreading integrated test device according to claim 2, wherein the right side of the pressure plate is provided with a groove in which the backing plate can be embedded.
4. The thin-walled tube bending and spreading integrated test device according to claim 3, wherein the upper and lower ends of the inlet side and the outlet side of the flattening mechanism are respectively provided with a screw rod mechanism, the center line of the screw rod is perpendicular to the backing plate, and the center lines of the screw rods are parallel to each other.
5. The thin-walled tube press-bending-unfolding integrated test device as claimed in claim 4, wherein the transmission mechanism comprises a clamping motor, a first bevel gear, a second bevel gear, a transmission shaft, a support base, a third bevel gear, a fourth bevel gear, a fifth bevel gear and a sixth bevel gear, the first bevel gear is fixedly mounted on an output shaft of the clamping motor, the second bevel gear is fixedly mounted in the middle of the transmission shaft, the third bevel gear is fixedly mounted on the upper end of the transmission shaft, the fourth bevel gear is fixedly mounted on the lower end of the transmission shaft, the fifth bevel gear is fixedly mounted on the end portion of the lead screw nut of one of the lead screw mechanisms respectively disposed on the upper ends of the inlet side and the outlet side of the flattening mechanism, and the sixth bevel gear is fixedly mounted on the end portion of the lead screw nut of one of the lead screw mechanisms respectively disposed on the lower ends of the inlet side and the outlet side of the flattening mechanism, the first bevel gear and the second bevel gear form bevel gear transmission, the third bevel gear and the fifth bevel gear form bevel gear transmission, the fourth bevel gear and the sixth bevel gear form bevel gear transmission, the supporting seat is fixedly installed on the right side face of the bearing plate, the supporting seat and the transmission shaft form a rotating pair, and the clamping motor is fixedly installed on the right side of the bearing plate.
6. A thin-walled tube bending and spreading integrated test device as claimed in claim 5, wherein the inlet side and the outlet side of the flattening mechanism are respectively provided with one transmission mechanism.
7. The thin-walled tube bending and spreading integrated test device of claim 6, wherein the flattening mechanism further comprises universal wheels, the universal wheels are fixedly mounted at the lower ends of the pressing plate and the bearing plate, the number of the universal wheels at the lower end of the pressing plate is greater than or equal to 2, and the number of the universal wheels at the lower end of the bearing plate is greater than or equal to 2.
8. The thin-walled tube bending and spreading integrated test device according to claim 7, wherein the bending transmission mechanism comprises a bending motor, a first gear and a second gear, the first gear is fixedly connected with an output shaft of the bending motor, the second gear is fixedly connected with one end of the rotating shaft, the first gear and the second gear form a gear transmission pair, the bending motor is fixedly mounted on the first connecting plate, and the bending motors of the bending mechanisms at the upper end and the lower end between two adjacent flattening mechanisms are symmetrically arranged.
9. The thin-walled tube bending and spreading integrated test device according to claim 8, wherein the torque sensor is arranged at the other end of the rotating shaft, and the pressure sensor is arranged between the backing plate and the bearing plate.
10. A method for using the thin-walled tube bending and spreading integrated test device of claim 9, comprising the following steps:
the method comprises the following steps: placing the integrated test device on a smooth and horizontal plane;
step two: debugging and calibrating the clamping motor, the bending motor and the sensor of the integrated test device;
step three: clamping a test piece between the pressing plate and the base plate of the flattening mechanism, and pre-pressing by the clamping motor;
step four: synchronously controlling the clamping motors of the flattening mechanisms, and keeping the adjacent flattening mechanisms to flatten the test piece synchronously until the clamping motors stop after the test piece reaches a test design state;
step five: the bending motors between the adjacent flattening mechanisms are synchronously controlled to drive the two adjacent groups of flattening mechanisms to rotate around the rotating shaft, so that the flattened test piece is bent; recording the mechanical state parameters of clamping and bending of the test piece from the third step to the fifth step through the sensor;
step six: and determining the resilience mechanical state parameters of the test piece according to the reverse sequence of the third step to the fifth step.
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