CN205483851U - Heavy -calibre high strength composite material pipe torsion test device - Google Patents

Abstract

The utility model discloses a large-diameter high-strength composite material circular tube torsion test device, which connects the two ends of the fixture disc on the circular tube through a steel wire rope, uses a fixed pulley to change the direction of the pulling force, and finally combines two steel wire ropes together through a balance lever. , only one actuator can simply and conveniently realize the goal of converting the unidirectional tensile force into the torsional moment of the circular tube test piece. Since the torque of the circular tube test piece is equal to the product of the tensile force and the diameter of the clamp disk on the circular tube, for the high-strength composite material circular tube torsion test, even if the pulling force of the actuator is limited, it can be increased by increasing the diameter of the clamp disc on the circular tube. diameter to provide sufficient torsional moment, so that the circular tube test piece is damaged, and the tension of the left and right steel wire ropes is equal, and the direction is opposite, just to balance the bending moment, so that the circular tube test piece is only affected by pure torque, and the application of pure shear load is realized. , which is more accurate than the general in-plane shear test method.

Description

Torsion test device for large-diameter high-strength composite material circular tube

Technical field:

The utility model provides a large-diameter high-strength composite material circular tube torsion test device, which belongs to the technical field of circular tube testing.

Background technique:

Composite round tubes have the advantages of high specific strength, high specific stiffness, small expansion coefficient, and good damping properties, and are widely used in aerospace, shipping, transportation, oil exploration and other fields. In order to rationally design and safely use composite tubes, relevant tests must be carried out to determine their economy, safety and effectiveness. Generally, the circular tube torsion test is used to test the in-plane shear performance of the composite material test piece and the torsional failure strength of the circular tube. It is often difficult to measure the failure strength of round pipes.

Utility model content:

The purpose of this utility model is to provide a large-diameter high-strength composite material circular tube torsion test device with simple tooling, low cost, and easy and effective operation, which overcomes the deficiencies of existing test devices and technologies, and solves the torsion performance of high-strength composite material circular tubes. The problem of the test is to provide a practical method for measuring the failure load and failure strength of large-diameter high-strength composite pipes.

The utility model adopts the following technical scheme: a large-diameter high-strength composite material circular pipe torsion test device, including a fixed pulley, a steel wire rope, a circular pipe test piece, a circular pipe upper fixture, a circular pipe lower fixture, a balance lever, an actuating cylinder and The steel wire rope fixing rod, the upper clamp of the round tube includes the disc of the upper clamp of the round tube and the boss of the upper clamp of the round tube located on the lower surface of the disc of the upper clamp of the round tube, the lower clamp of the round tube includes the platform of the lower clamp of the round tube and the platform of the lower clamp of the round tube On the upper surface of the fixture platform, there is a ring of threaded holes on the upper and lower ends of the round pipe fixture respectively, and a ring of threaded holes are respectively arranged on the upper and lower ends of the round pipe test piece. For the opposite round hole, the threaded hole on the boss of the fixture on the round pipe is aligned with the round hole on the upper end of the round pipe test piece, and then bolts are pierced to connect the round pipe upper fixture and the round pipe test piece together. The threaded hole on the boss of the lower fixture of the round pipe is aligned with the round hole at the lower end of the round pipe test piece, and then bolts are threaded to connect the lower fixture of the round pipe with the round pipe test piece. The steel wire rope fixing rods include respectively The first fixed rod and the second fixed rod located on both sides of the clamp on the round pipe, the steel wire rope includes two strands, which are respectively connected to the first fixed rod and the second fixed rod, and the steel wire rope connected to the first fixed rod The other end of the balance lever is directly connected to one end of the balance lever, and the other end of the wire rope connected to the second fixed rod is connected to the other end of the balance lever after bypassing the fixed pulley. The center of the balance lever is connected to the actuator, The pulling force is provided by the actuator.

Further, the fixed pulley is fixed on the wall, and is located on the same horizontal plane as the clamp disc on the round pipe.

Further, the thrust center line of the actuator coincides with the normal line of the center of the overbalanced lever to ensure that the pulling forces of the two wire ropes are equal.

Further, the number of circular holes provided at the upper end of the circular tube test piece is 6 or 8.

Further, the number of circular holes provided at the lower end of the circular tube test piece is 6 or 8.

The utility model also adopts the following technical scheme: a test method for a large-diameter high-strength composite material circular tube torsion test device, which includes the following steps:

Step 1. Fix the platform of the lower clamp of the round tube on the ground, then put the test piece of the round tube on the boss of the lower fixture of the round tube, rotate the test piece of the round tube until the round hole at the lower end of the test piece of the round tube and the lower clamp of the round tube The threaded holes on the boss are aligned, and the round tube test piece is connected with the boss of the lower fixture of the round tube by bolts;

Step 2. Insert the upper fixture boss of the round pipe into the upper end of the round pipe test piece, rotate the upper fixture boss of the round pipe until the round hole on the round pipe test piece coincides with the threaded hole on the upper fixture boss of the round pipe, and use bolts to screw the round pipe into place. The upper end of the tube test piece is connected with the upper fixture boss of the round tube;

Step 3. Fix the fixed pulley horizontally on one side of the wall, and connect the two steel wire ropes to the first fixed rod and the second fixed rod along the concave outer edge of the clamp disc on the round pipe;

Step 4: Connect the other end of the steel wire rope connected to the first fixed rod directly to one end of the balance lever, and connect the other end of the wire rope connected to the second fixed rod to the other end of the balance lever after bypassing the fixed pulley end;

Step five, connect the center of the balance lever with the actuator;

Step 6: After the device is connected, the torsion test of the composite material circular tube is carried out.

The utility model has the following beneficial effects: the two ends of the fixture disc on the round pipe are connected by a steel wire rope, and the direction of the pulling force is changed by using a fixed pulley, and finally the two strands of steel wire ropes are merged together by a balance lever, which is simple and convenient with only one actuator To achieve the goal of converting the unidirectional tensile force into the torsional moment of the circular tube test piece. Since the torque of the circular tube test piece is equal to the product of the tensile force and the diameter of the clamp disk on the circular tube, for the high-strength composite material circular tube torsion test, even if the pulling force of the actuator is limited, it can be increased by increasing the diameter of the clamp disc on the circular tube. diameter to provide sufficient torsional moment, so that the circular tube test piece is damaged, and the tension of the left and right steel wire ropes is equal, and the direction is opposite, just to balance the bending moment, so that the circular tube test piece is only affected by pure torque, and the application of pure shear load is realized. , which is more accurate than the general in-plane shear test method.

Description of drawings:

Fig. 1 is the overall schematic diagram of the torsion test device of the large-diameter high-strength composite material circular tube of the present invention;

Fig. 2 is a schematic diagram of the tooling of the large-caliber high-strength composite material circular tube test piece of the utility model.

Label names in the figure: 1. Fixed pulley, 2. Steel wire rope, 3. Round tube test piece, 4. Round tube upper fixture, 5. Round tube lower fixture, 6. Balance lever, 7. Actuating cylinder, 8. Wire rope fixation Rod, 9, threaded hole, 10, round hole, 11, clamp disc on round tube, 12, clamp boss on round tube, 13, clamp boss under round tube, 14, clamp platform under round tube.

detailed description:

Please refer to Fig. 1 and Fig. 2, the large-diameter high-strength composite material circular tube torsion test device of the present invention includes a fixed pulley 1, a steel wire rope 2, a circular tube test piece 3, a circular tube upper clamp 4, a circular tube lower clamp 5, Balance lever 6, actuating cylinder 7, wire rope fixed rod 8, wherein the clamp 4 on the round tube includes the upper clamp disc 11 on the round tube and the upper clamp boss 12 on the lower surface of the clamp disc 11 on the round tube, the round tube The lower fixture 5 comprises a round pipe lower fixture platform 14 and a round pipe lower fixture boss 13 positioned on the upper surface of the round pipe lower fixture platform 14, and a circle is respectively arranged on the round pipe upper fixture boss 12 and the round pipe lower fixture boss 13. The threaded hole 9 is provided with a ring of round holes 10 opposite to the threaded hole 9 at the upper and lower ends of the round pipe test piece 3 respectively. The threaded hole 9 on the boss 12 of the upper fixture of the round pipe is aligned with the round hole 10 at the upper end of the round pipe test piece 3, and then bolts are pierced to connect the upper fixture 4 of the round pipe and the round pipe test piece 3 together. The threaded hole 9 on the boss 13 of the lower clamp is aligned with the circular hole 10 at the lower end of the circular tube test piece 3 and then a bolt is inserted to connect the circular tube lower clamp 5 and the circular tube test piece 3 together. The wire rope fixing rod 8 includes a first fixing rod a and a second fixing rod b, which are respectively located on both sides of the clamp 4 on the round pipe. The wire rope 2 includes two strands, which are connected to the first fixing rod a and the second fixing rod respectively. On the rod b, the other end of the steel wire rope 2 connected to the first fixed rod a is directly connected to one end of the balance lever 6 (end aa in the figure), and the other end of the steel wire rope 2 connected to the second fixed rod b goes around The fixed pulley 1 is connected to the other end (bb end among the figures) of the balance lever 6. The center of the balance lever 6 links to each other with the actuator 7, and the actuator 7 provides pulling force.

The test method of the large-diameter high-strength composite material circular tube torsion test device of the utility model, the steps are as follows:

Step 1. Fix the round tube lower fixture platform 14 on the ground, then put the round tube test piece 3 on the round tube lower fixture boss 13, and rotate the round tube test piece 3 until the round hole at the lower end of the round tube test piece 3 10 is aligned with the threaded hole 9 on the boss 13 of the lower fixture of the round pipe, and the test piece 3 of the round pipe is connected with the boss 13 of the lower fixture of the round pipe with bolts.

Wherein, in step 1, the size and shape of the fixture platform 14 under the round tube can be adjusted according to the installation position and fixing method, and the number and size of round holes on the round tube test piece 3 can be adjusted according to the actual situation. "Actual situation" refers to the diameter and strength of the circular pipe test piece 3 . If the strength is high and the diameter is large, the diameter of the bolt and the number of holes should be appropriately increased. Correspondingly, the threaded holes on the boss 13 of the lower fixture of the round pipe are determined according to the size and number of holes of the round pipe test piece 3 .

Step 2: Insert the upper fixture boss 12 of the round pipe into the upper end of the round pipe test piece 3, and rotate the upper fixture boss 12 of the round pipe until the round hole 10 on the round pipe test piece 3 and the threaded hole on the upper fixture boss 12 of the round pipe 9 overlap, and use bolts to connect the upper end of the round tube test piece 3 with the upper fixture boss 12 of the round tube.

Step 3. Fix the fixed pulley 1 horizontally on one side of the wall, connect the two strands of steel wire rope 2 to the steel wire rope fixing bar 8 along the concave outer edge of the fixture disc 11 on the round pipe respectively, and the steel wire rope a' is connected to the first fixed On the rod a end, the wire rope b' is connected to the second fixed rod b end.

Wherein, in step 3, the fixed pulley 1 is on the same horizontal plane as the clamp disc 11 on the round pipe, so as to ensure that the steel wire rope remains horizontal after passing through the fixed pulley.

Step 4, directly connect the other end of the wire rope a' to the end of the balance lever aa, and connect the other end of the wire rope b' to the end of the balance lever bb after bypassing the fixed pulley.

Step five, connect the center c of the balance lever 6 with the actuator cylinder 7 .

Step 6: After the device is connected, the torsion test of the composite material circular tube is carried out.

The utility model connects the two ends of the clamp disc on the round pipe through the steel wire rope, and uses the fixed pulley to change the direction of the pulling force, and finally combines the two strands of steel wire rope together through the balance lever. Only one actuator can simply and conveniently realize the one-way The target for converting the tensile force into the torsional moment of the circular tube test piece. Since the torque of the circular tube test piece is equal to the product of the tensile force and the diameter of the clamp disk on the circular tube, for the high-strength composite material circular tube torsion test, even if the pulling force of the actuator is limited, it can be increased by increasing the diameter of the clamp disc on the circular tube. diameter to provide sufficient torsional moment, so that the circular tube test piece is damaged, and the tension of the left and right steel wire ropes is equal, and the direction is opposite, just to balance the bending moment, so that the circular tube test piece is only affected by pure torque, and the application of pure shear load is realized. , which is more accurate than the general in-plane shear test method.

The above is only a preferred embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements can be made without departing from the principle of the utility model, and these improvements should also be regarded as the present invention. Protection scope of utility model.

Claims (5)

1. a heavy caliber high-strength composite tube crane torsion test device, it is characterised in that: include fixed pulley (1), Fixture (4), pipe lower clamp (5), balanced lever (6), work on steel wire rope (2), pipe testpieces (3), pipe Bar (8) fixed by dynamic cylinder (7) and steel wire rope, and on described pipe, fixture (4) includes fixture disk (11) and position on pipe Fixture boss (12) on the pipe of fixture disk (11) lower surface on pipe, pipe lower clamp (5) includes under pipe Jig platform (14) and be positioned at pipe lower clamp boss (13) of pipe lower clamp platform (14) upper surface, at pipe It is respectively arranged with a circle screwed hole (9) on upper fixture boss (12) and pipe lower clamp boss (13), tests at pipe Two ends up and down of part (3) are respectively arranged with the circular hole (10) that a circle is relative with screwed hole (9), and described pipe presss from both sides The circular hole (10) of the end upper with pipe testpieces (3) of the screwed hole (9) on tool boss (12) is equipped with after aligning Bolt so that fixture on pipe (4) and pipe testpieces (3) are connected together, described pipe lower clamp boss (13) On the circular hole (10) of screwed hole (9) and pipe testpieces (3) lower end align after be equipped with bolt with by pipe Lower clamp (5) is connected together with pipe testpieces (3), and described steel wire rope is fixed bar (8) and included laying respectively at circle On pipe, the first of fixture (4) both sides fixes bar (a) and second and fixes bar (b), and described steel wire rope (2) includes two Stock, it is connected to first and fixes bar (a) and second and fix on bar (b), is connected to first and fixes on bar (a) The other end of steel wire rope (2) be connected directly between an end of balanced lever (6), be connected to second and fix bar (b) On the other end of steel wire rope (2) walk around fixed pulley (1) after be connected to another end of balanced lever (6), described The center of balanced lever (6) is connected with pressurized strut (7), pressurized strut (7) provide pulling force.

2. heavy caliber high-strength composite tube crane torsion test device as claimed in claim 1, it is characterised in that: institute State fixed pulley (1) to be fixed on wall, be positioned in same level with fixture disk (11) on pipe.

3. heavy caliber high-strength composite tube crane torsion test device as claimed in claim 2, it is characterised in that: institute State pressurized strut (7) thrust center line to overlap to ensure two strand steel wire ropes (2) with the normal at overbalance lever (6) center Pulling force equal.

4. heavy caliber high-strength composite tube crane torsion test device as claimed in claim 3, it is characterised in that: institute The circular hole quantity of the upper end setting stating pipe testpieces (3) is 6 or 8.

5. heavy caliber high-strength composite tube crane torsion test device as claimed in claim 4, it is characterised in that: institute The circular hole quantity of the lower end setting stating pipe testpieces (3) is 6 or 8.