Auxiliary fixture for 50T tensile testing of D-ring binding components

Abstract

This invention discloses an auxiliary tooling for a 50T tensile test of D-ring binding components, including a D-ring connector that matches the clamp of a 50T tensile testing machine and a fastening assembly for connecting two symmetrically arranged D-rings. During the tensile test, the upper and lower ends move towards each other, tightening the rings and tightly binding the two D-rings together. This eliminates the need for the previous step of finding a steel plate for welding on both sides of the two D-rings, demonstrating a clever design and improving the efficiency of preparing auxiliary tooling for tensile testing. This invention can reduce outsourcing costs for testing, enhance the tensile testing capabilities of ship repair companies, and provide them with D-ring tensile testing equipment and experience, enabling them to verify whether the performance of the D-ring binding components meets the required breaking strength.

Description

TECHNICAL FIELD

[0001] The application relates to an auxiliary tool for a D-shaped ring binding piece 50T tension tensile test. BACKGROUND

[0002] The D-shaped ring purchased for the production of the steel structure sea transport bracket of a ship-repairing and shipbuilding enterprise is an important binding hoisting piece in the transportation process of a wind tower. Therefore, when different tension D-shaped rings are purchased or a newly-introduced binding piece manufacturer supplies for the first time, a tension breaking test needs to be carried out to verify whether the product performance meets the standard (whether the indicated tension can be reached). The 50-ton tension D-shaped ring newly purchased by the material department from a new manufacturer needs to apply for a tension breaking test. The measurement management department of the quality department inquires from the measurement and verification institutions in Jiangyin and Wuxi, etc. These measurement and verification institutions all have tension test equipment, but no auxiliary tool for D-shaped ring tension test. The patent with the publication number CN101819133B: an auxiliary peeling device used in a tension machine and a tension machine provided with the device, the auxiliary peeling device comprises a clamping part matched with a traction chuck in the tension machine, a groove connected with the clamping part and containing a stuck test piece, the groove has an opening allowing the coiled material on the stuck test piece to be peeled, and a clamping part preventing the stuck test piece from being taken out of the groove. The auxiliary peeling device provided by the application contains the cement mortar plate in the auxiliary peeling device, and then the auxiliary peeling device is connected with the traction chuck of the tension machine, so that the problem that the mortar plate is easily clamped and broken when the chuck is connected with the mortar plate is avoided. The patent with the publication number CN115824797A: a tension testing machine improving clamping operation and a use method, relates to the technical field of dynamic balance testing, to solve the problem that the existing tension testing machine needs to be fixed on both ends of the object to be detected before detection, and the clamping effect is poor. The clamping moving plate is installed on the front side of the clamping mechanism, the clamping moving plate is connected with the clamping mechanism in front and back movement, a servo motor is arranged below one side of the clamping mechanism, the output end of the servo motor extends to the inside of the clamping mechanism, a reserved cavity is arranged in the clamping mechanism, a transmission gear is arranged in the reserved cavity, the transmission gear rotates through the servo motor, the lower end surface of the clamping moving plate is provided with a protruding block, the protruding block is connected with the two sides of the inner wall of the reserved cavity on the clamping mechanism through buckle sliding connection, and the clamping moving plate is connected with the clamping mechanism in front and back movement through the rotation of the transmission gear. There is no tension testing machine for D-shaped ring tension test or tool convenient for D-shaped ring tension test in the prior art. SUMMARY

[0003] The purpose of the present application is to overcome the defects existing in the prior art, provide a D-shaped ring binding piece 50T tension test auxiliary tool, which can reduce the test outsourcing cost, improve the tension test capacity of ship repair and shipbuilding enterprises, and enable the ship repair enterprise to have D-shaped ring tension test instruments and D-shaped ring tension test experience.

[0004] To achieve the above purpose, the technical scheme of the present application is to design a D-shaped ring binding piece 50T tension test auxiliary tool, which includes a D-shaped ring connecting piece matched with the chuck of a 50T tension machine and a buckling assembly for connecting two symmetrically arranged D-shaped rings. The setting of the buckling assembly enables the originally unable-to-directly-test D-shaped ring to be arranged relatively and then passed through the D-shaped ring with the connecting piece, and after the connecting piece is connected with the chuck of the tension machine, the tension test of the D-shaped ring can be performed. The ship repair and shipbuilding enterprise has the tension test capacity of D-shaped rings of 50 tons and below, and provides valuable experience for future similar binding piece tension tests.

[0005] Further technical solutions are that the connecting piece includes a flower and rod and a safety shackle, the rod end of the flower and rod is connected with the chuck of the 50T tension machine, the flower end of the flower and rod is used for the annular segment of the D-shaped ring to pass through, and the safety shackle is detachably connected with the flower end. The flower and rod includes a rod segment and a flower segment integrally formed with the rod segment, the flower segment is in a U shape, the D-shaped ring passes through the U-shaped flower segment, and the end face of the flower segment away from the rod segment is provided with a through hole through which the safety shackle passes; the safety shackle includes a cylinder matched with the through hole and a metal wire matched and arranged with the cylinder, and the cylinder is provided with a through hole through which the metal wire passes; after the D-shaped ring passes through the U-shaped flower segment, the cylinder is inserted and then the metal wires at both ends of the cylinder are bent, so that the cylinder is prevented from separating from the flower segment, and the tension test is facilitated.

[0006] Further technical solutions are that the buckling assembly includes a 10mm-20mm thick steel plate welded on the straight line portions of the two symmetrically arranged D-shaped rings.

[0007] Further technical solutions are that one side of the steel plate is welded on the front side of one of the two symmetrically arranged D-shaped rings, and the other side of the steel plate is welded on the back side of the other of the two symmetrically arranged D-shaped rings. The two symmetrically arranged D-shaped rings are vertically arranged (i.e., the symmetry axes of the two symmetrically arranged D-shaped rings are horizontally arranged) during the tension test, and the vertical plane formed by the two symmetrically arranged D-shaped rings is parallel to the left and right vertical frames of the protection frame. Here, the "front side" and the "back side" refer to the sides of the two symmetrically arranged D-shaped rings respectively facing the left and right vertical frames of the protection frame.

[0008] Another technical solution involves a steel plate whose surface is parallel to the axis of symmetry of two symmetrically arranged D-rings. An arc-shaped steel plate is welded to each surface of the steel plate facing one of the two D-rings, and the space formed by the steel plate and the arc-shaped steel plate surrounds the straight portion of the D-ring. After testing, the tensile testing method and the developed auxiliary tooling were verified as effective, and the turnbuckle can be reused. The D-ring tensile testing was changed from being outsourced to being conducted in-house, reducing testing and inspection costs and outsourced tooling costs by 1500 yuan per test, thus lowering the company's testing and inspection expenses.

[0009] Another technical solution is that the fastening assembly includes a flexible rectangular plate and two sections of steel wire rope. The flexible rectangular plate is wound around the straight sections of two symmetrically arranged D-shaped rings to form a flexible sleeve.

[0010] After both sections of wire rope are evenly wound on the flexible sleeve, they form four rope ends at the top and bottom respectively. Two rope ends on one section of wire rope face the fixed clamp of the 50T tensile testing machine, and two rope ends on the other section of wire rope face the oil cylinder set on one side of the 50T tensile testing machine.

[0011] The two ends of each wire rope segment are located at the two ends of the straight section of the D-ring. The two ends of one wire rope segment are fixedly connected to the fixed clamp, and the two ends of the other wire rope segment are fixedly connected to the exposed end of the piston rod of the hydraulic cylinder. During the tensile test, when the upper and lower clamps move towards each other (and the hydraulic cylinder also moves, with the extension and retraction of the piston rod of the hydraulic cylinder in the same direction as the movement of the movable clamp), the flexible sleeve is tightened, making the two D-rings tightly bound together. This eliminates the need for a steel plate to be found and welded to both sides of the two D-rings in the early stage. The ingenious design improves the preparation efficiency of auxiliary tooling for tensile testing.

[0012] A further technical solution is to use a rubber plate or a flexible metal plate as the rectangular plate. This facilitates tensile testing. Before the test, the rectangular plate is wound around the straight section of the two D-rings to maintain their relative positions. Then, the steel wire rope is tightened by moving the movable clamp, thus tightly binding the two D-rings together.

[0013] A further technical solution is that the 50T tensile testing machine includes a base and a protective frame fixedly connected to the base. A fixed clamp and a movable clamp are installed on the protective frame. The movable clamp is driven by a drive mechanism and slides vertically on the protective frame. Both the fixed and movable clamps are equipped with clamping mechanisms for holding connecting parts. The drive mechanism includes a hydraulic press. The exposed end of the piston rod of the hydraulic press is fixedly connected to a sliding plate. The movable clamp is fixedly installed on the sliding plate, which slides on the protective frame. The protective frame has a groove for the sliding plate to slide. The clamping mechanism includes a clamping ball seat fixedly connected to the slide plate, a pair of clamping blocks symmetrically arranged and hinged to the clamping ball seat, a vertically slidable drive rod, the drive rod being slidably arranged at the center of the clamping ball seat, the drive rod having a toothed surface, a clamping operating rod hinged to the clamping ball seat, the end of the clamping operating rod facing the drive rod having a sector gear adapted to the aforementioned toothed surface, the end of the drive rod away from the slide plate being a stepped column with the larger end facing the clamping block, and the clamping block having a groove for placing the larger end of the drive rod.

[0014] The advantages and beneficial effects of this invention are: it can reduce the cost of outsourcing testing, improve the tensile testing capabilities of ship repair companies, and enable ship repair companies to have D-ring tensile testing instruments and experience in D-ring tensile testing, so as to verify whether the performance of D-ring binding products meets the standards, that is, whether they can meet the requirements of breaking tensile strength.

[0015] By setting up the fastening components, the D-ring, which originally could not be directly subjected to tensile testing, is positioned relative to the other side. Then, the connecting piece passes through the D-ring and is connected to the clamp of the tensile testing machine, allowing the tensile test of the D-ring to be performed.

[0016] During the tensile test, the upper and lower clamps move towards each other, which tightens the flexible sleeve and binds the two D-rings tightly together. This eliminates the need to find a steel plate to weld the two D-rings together on both sides in the early stage. The ingenious design improves the preparation efficiency of auxiliary tooling for tensile testing.

[0017] To facilitate tensile testing, before the test, the two D-rings are connected by winding a rectangular plate around the straight section of the two D-rings to maintain their relative positions. Then, the steel wire rope is tightened by moving the movable clamp, so that the two D-rings are tightly bound together.

[0018] After conducting the test, the effectiveness of the tensile test method and the developed auxiliary tooling was verified, and the turnbuckle was reusable.

[0019] This enables ship repair and shipbuilding companies to conduct tensile tests on D-rings of 50 tons and below, providing valuable experience for future tensile tests on similar lashing components.

[0020] The D-ring tensile test was previously outsourced to the company, but now it is conducted in-house. This reduces testing and inspection costs and outsourced tooling costs by 1,500 yuan per test, thus lowering the company's testing and inspection expenses. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an auxiliary tooling embodiment of the present invention for a D-shaped ring binding member used in a 50T tensile test;

[0022] Figure 2 yes Figure 1 Enlarged schematic diagram of the movable chuck;

[0023] Figure 3 yes Figure 1 The main view;

[0024] Figure 4 yes Figure 1 Side view;

[0025] Figure 5 yes Figure 3 A magnified view of the middle section;

[0026] Figure 6 yes Figure 4 A magnified view of the middle section;

[0027] Figure 7 yes Figure 3 A partially enlarged schematic diagram of the central fixed clamp and its surrounding components;

[0028] Figure 8 yes Figure 6 A magnified view of the middle section;

[0029] Figure 9 yes Figure 7 A partially enlarged schematic diagram of the central cylinder and its surrounding components;

[0030] Figure 10 This is a schematic diagram of Embodiment 2 of the present invention;

[0031] Figure 11 yes Figure 10 Side view;

[0032] Figure 12 yes Figure 11 A schematic diagram of another steel wire rope is shown;

[0033] Figure 13 yes Figure 10 A magnified view of the middle section;

[0034] Figure 14 yes Figure 11 A magnified view of the middle section;

[0035] Figure 15 yes Figure 12 A magnified view of the middle section.

[0036] In the diagram: 1. Turnbuckle; 2. Safety shackle; 3. 50T tensile testing machine; 4. D-ring; 5. Steel plate; 6. Curved steel plate; 7. Straight section; 8. Circular section; 9. Screw section; 10. Turnbuckle section; 11. Cylindrical section; 12. Metal wire; 13. Base; 14. Protective frame; 15. Fixed clamp; 16. Movable clamp; 17. Hydraulic press; 18. Slide plate; 19. Clamping ball seat; 20. Clamping block; 21. Drive rod; 22. Clamping operating rod; 23. Sector gear; 24. Groove; 25. Flexible rectangular plate; 26. Steel wire rope; 27. Hydraulic cylinder. Detailed Implementation

[0037] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention. Example 1

[0038] like Figures 1 to 9 As shown (for ease of illustration), Figure 1(Hydraulic press and D-ring not shown) This invention is an auxiliary tooling for a 50T tensile test of D-ring binding components, including a D-ring 4 connector that matches the clamp of a 50T tensile testing machine 3, and a fastening assembly for connecting two symmetrically arranged D-rings 4. The connector includes a turnbuckle 1 and a safety shackle 2. The turnbuckle 1 has its screw end connected to the clamp of the 50T tensile testing machine 3, and its turnbuckle end is used for the annular segment 8 of the D-ring 4 to pass through. The safety shackle 2 is detachably connected to the aforementioned turnbuckle end. The turnbuckle 1 includes a lead screw section 9 and a turnbuckle section 10 integrally formed with the lead screw section 9. The turnbuckle section 10 is U-shaped, and a D-ring 4 passes through the U-shaped turnbuckle section 10. The end face of the turnbuckle section 10 away from the lead screw section 9 has a through hole through which a safety shackle 2 passes. The safety shackle 2 includes a cylinder 11 adapted to the aforementioned through hole and a metal wire 12 matched with the cylinder 11. The cylinder 11 has a through hole for the metal wire 12 to pass through. The fastening assembly includes a 10mm-20mm thick steel plate 5 welded to the straight portion 7 of two symmetrically arranged D-rings 4. The surface of the steel plate 5 is parallel to the axis of symmetry of the two symmetrically arranged D-rings 4. An arc-shaped steel plate 6 is welded to the surface of the steel plate 5 facing the two D-rings 4. The space formed by the steel plate 5 and the arc-shaped steel plate 6 surrounds the straight portion 7 of the D-rings 4. The 50T tensile testing machine 3 includes a base 13 and a protective frame 14 fixedly connected to the base 13. A fixed clamp 15 and a movable clamp 16 are mounted on the protective frame 14. The movable clamp 16 is vertically slidable on the protective frame 14 after being driven by a drive mechanism. Both the fixed clamp 15 and the movable clamp 16 are equipped with clamping mechanisms for holding connecting parts. The drive mechanism includes a hydraulic press 17. The exposed end of the piston rod of the hydraulic press 17 is fixedly connected to a slide plate 18. The movable clamp 16 is fixedly mounted on the slide plate 18, which is slidably mounted on the protective frame 14. The protective frame 14 is provided with a groove for the slide plate 18 to slide. The clamping mechanism includes a clamping ball seat 19 fixedly connected to the slide plate 18, a pair of clamping blocks 20 symmetrically arranged and hinged to the clamping ball seat 19, and a vertically slidable drive rod 21. The drive rod 21 is slidably arranged at the center of the clamping ball seat 19, and the rod surface of the drive rod 21 is provided with a toothed shape. A clamping operation rod 22 is hinged to the clamping ball seat 19. The end of the clamping operation rod 22 facing the drive rod 21 is provided with a sector gear 23 that matches the aforementioned toothed shape. The end of the drive rod 21 away from the slide plate 18 is stepped columnar and the larger end is set facing the clamping block 20. The clamping block 20 is provided with a groove 24 for placing the larger end of the drive rod 21.

[0039] The main components are as follows:

[0040] Flower threaded rod and pin: 2*2 pieces

[0041] D-rings: 2

[0042] Buckles: 2

[0043] The working principle is as follows:

[0044] By using turnbuckles and safety shackles obtained from the manufacturer.

[0045] The turnbuckle was cut according to the length of the bearing end of the 100T tensile testing machine that the company already owned.

[0046] Then the D-ring is sent to the welding laboratory for welding. (Find a 10mm-20mm thick steel plate for welding both sides.)

[0047] Secure the cut turnbuckle to both ends of the welded D-ring with shackles.

[0048] The modified D-ring (used for tensile testing) was used on the company's existing 100T tensile testing machine for testing.

[0049] The lead screw segment 9 of the turnbuckle 1 is placed between the two clamping blocks 20. Then, the clamping operating rod 22 at the movable chuck 16 is pressed down, and the clamping operating rod 22 at the fixed chuck 15 is pressed up, causing the drive rod 21 at the movable chuck 16 to move downward (and the drive rod 21 at the fixed chuck 15 to move upward). Since the clamping blocks 20 are hinged to the clamping ball seat 19, both the upper and lower pairs of clamping blocks 20 clamp the lead screw segments 9 of the upper and lower turnbuckle 1. After the hydraulic press 17 is activated, it pulls the slide plate 18 downward to achieve the tensile test. Example 2

[0050] The difference from Embodiment 1 is that, as Figures 10 to 15 As shown (for ease of illustration), Figure 11 and Figure 12 Only one steel wire rope is shown. Figure 11 The wire rope shown is connected to the fixed clamp. Figure 12 The steel wire rope shown is connected to the exposed end of the piston rod of the hydraulic cylinder. The fastening assembly includes a flexible rectangular plate 25 and two steel wire ropes 26. The flexible rectangular plate 25 is wound around the straight portion of two symmetrically arranged D-shaped rings to form a flexible sleeve. The two steel wire ropes 26 are evenly wound around the flexible sleeve to form four rope ends. Two rope ends on one steel wire rope 26 face the fixed clamp of the 50T tensile testing machine, and two rope ends on the other steel wire rope 26 face the hydraulic cylinder 27 located on one side of the 50T tensile testing machine. The two rope ends of each steel wire rope 26 are located at both ends of the straight portion of the D-shaped ring. The two rope ends of one steel wire rope 26 are fixedly connected to the fixed clamp, and the two rope ends of the other steel wire rope 26 are fixedly connected to the exposed end of the piston rod of the hydraulic cylinder 27. The rectangular plate is a rubber plate.

[0051] The working principle is as follows:

[0052] A flexible rectangular plate 25 is wound around the straight sections of the two D-rings to form a flexible sleeve. A steel wire rope 26 is then wound around this flexible sleeve. The two ends of one steel wire rope 26 are fixedly connected to a fixed clamp, and the two ends of the other steel wire rope 26 are fixedly connected to the exposed end of the piston rod of the hydraulic cylinder 27. During the tensile test, when the upper and lower clamps move towards each other (and the hydraulic cylinder 27 also moves, with the piston rod of the hydraulic cylinder 27 extending and retracting in the same direction as the movable clamp), the flexible sleeve is tightened, tightly binding the two D-rings together. This eliminates the need for a separate steel plate to weld the two D-rings together on both sides. The ingenious design improves the efficiency of preparing auxiliary tooling for tensile testing.

[0053] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An auxiliary jig for a tensile test of a D-ring tie-down 50T, characterized by, The D-shaped ring connecting piece is matched with the chuck of the 50T tensile testing machine, and the buckling assembly is used to connect the two symmetrically arranged D-shaped rings; The connecting piece comprises a lead screw and a safety buckle, the lead screw end is connected with the chuck of the 50T tensile testing machine, and the lead screw is used for the annular segment of the D-shaped ring to pass through the lead screw end, and the safety buckle is detachably connected with the lead screw end; The buckling assembly comprises a flexible rectangular plate and two steel wire ropes, the flexible rectangular plate is wound on the straight line part of the two symmetrically arranged D-shaped rings to form a flexible sleeve; After the two steel wire ropes are uniformly wound on the flexible sleeve, four rope heads are formed, the two rope heads on one steel wire rope are towards the fixed chuck of the 50T tensile testing machine, and the two rope heads on the other steel wire rope are towards the oil cylinder arranged on one side of the 50T tensile testing machine; The two rope heads of each steel wire rope are located at the two ends of the straight line part of the D-shaped ring, the two rope heads of one steel wire rope are fixedly connected with the fixed chuck, and the two rope heads of the other steel wire rope are fixedly connected with the exposed end of the piston rod of the oil cylinder; in the tensile test, when the two chucks move towards each other, the oil cylinder synchronously acts, the extension and contraction of the piston rod of the oil cylinder is consistent with the moving direction of the movable chuck, the flexible sleeve is synchronously tensioned, and the two D-shaped rings are tightly bundled together.

2. The D-ring tie-down 50T pull-stretch test aid of claim 1, wherein, The rectangular plate is a rubber plate or a flexible metal plate.

3. The D-ring tie-down 50T pull-stretch test aid of Claim 2, wherein, The 50T tensile testing machine comprises a tensile testing machine base, a protection frame fixedly connected with the base, a fixed chuck and a movable chuck arranged on the protection frame, the movable chuck is vertically slidably arranged on the protection frame after being driven by a driving mechanism, and the fixed chuck and the movable chuck are provided with clamping mechanisms for clamping the connecting piece.

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