Breaking torque test tool and device

Abstract

The utility model relates to the field of bolt mechanical property testing, and particularly discloses a failure torque testing tool and device, and the failure torque testing tool comprises a placing seat, a clamping assembly, a locking ring and a locking sleeve. The clamping assembly is composed of two clamping blocks with half holes, and the cross section of the clamping assembly is in the shape of a non-rotating body. And a first inclined surface is arranged on the clamping block and is matched with a second inclined surface on the inner wall of the locking ring. The locking sleeve is in threaded connection with the placing seat, the locking ring is pressed down during screwing, and the two clamping blocks are forced to be tightened in the radial direction through the action of the inclined surfaces, so that the bolt to be tested is firmly clamped. According to the utility model, axial locking force is efficiently converted into strong radial clamping force through the inclined plane mechanism, so that the technical problem that a large-specification bolt is easy to slip in a failure torque test is effectively solved, pure torque loading conditions of the test are ensured, and the accuracy and reliability of test data are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bolt mechanical property test field, concretely relates to a kind of destruction torque test tool and device. BACKGROUND

[0002] At present, the destruction torque test fixture generally used in the industry, its clamping principle mainly relies on the radial direct locking of three-jaw chuck type or bench vice type.These traditional fixtures are applicable when dealing with small size or low torque requirement bolts.However, when facing larger nominal diameter (such as more than M8), higher performance grade (such as 8.8 to 12.9 grade) bolts, the minimum destruction torque value required by them increases sharply (for example, M10 bolt can reach up to 114 Nm).Under this high torque load, the existing fixture exposes obvious technical defects.

[0003] Firstly, the clamping force is insufficient and easy to slip.The radial clamping force provided by the traditional fixture is limited, and lacks effective force amplification or locking mechanism.When a large size bolt is subjected to a torque close to its material limit, the friction between the fixture and the bolt thread surface is easily overcome, causing the bolt to rotate relative to the fixture (i.e., "slip"), which prevents the test from being completed normally or the data from being invalid.

[0004] Secondly, the clamping stability is poor, affecting the measurement accuracy.When the existing fixture is subjected to high torque impact, the clamping unit itself may rotate slightly or shift, causing the applied torque not to act completely on the pure torsional deformation of the bolt, and part of the energy is consumed in overcoming unnecessary friction or eccentric force of the bolt, thereby introducing significant measurement error, which is difficult to meet the high-precision testing requirements.

[0005] Therefore, it is a technical problem to be solved in the field to develop a technical solution that can provide a super-strong, stable and precisely controllable clamping force for bolts, especially large size high strength bolts in destruction torque test, while strictly meeting the pure torque loading standard. CONTENT OF THE UTILITY MODEL

[0006] To solve the above technical problems, the utility model solves the problems through the following technical solutions.

[0007] A destruction torque test tool, comprising a placement seat, a clamping assembly, a locking ring and a locking sleeve.

[0008] The cross section of the clamping assembly is a non-rotational body shape, which includes two clamping blocks, and a half hole is provided on the opposite surface of each clamping block. When the two clamping blocks are combined, the two half holes form a threaded hole for connecting the bolt to be tested; the placement seat is provided with a mounting groove for mounting the clamping assembly.

[0009] The first inclined surface is arranged on the clamp block, and the first inclined surfaces of the two clamp blocks are symmetrically distributed; the locking ring is arranged on the clamping assembly, a first through slot is arranged in the middle of the locking ring for exposing the top of the clamping assembly, and the inner walls on both sides of the first through slot are second inclined surfaces matched with the first inclined surfaces.

[0010] The locking sleeve is threadedly connected with the placing seat, a second through slot is arranged on the top of the locking sleeve for exposing the top of the clamping assembly, and the locking sleeve is pressed downwards to compress the locking ring, so that the second inclined surface of the locking ring is matched with the first inclined surface of the clamp block, thereby locking the two clamp blocks.

[0011] Further, the threaded hole is a through hole, and the breaking torque test tool further comprises an abutting block arranged directly below the threaded hole and used for abutting against the bottom of the bolt to be tested.

[0012] Further, a backing plate is arranged in the mounting groove and used for backing the clamping assembly.

[0013] A breaking torque test device comprises a workbench and a liftable head, the breaking torque test tool as claimed in any one of the above is arranged on the workbench, and the head is used for applying torque to the bolt to be tested during the test, is internally provided with a torque sensor and is connected with a connector, the connector is detachably connected with an adapter head, and the adapter head is provided with a groove matched with the shape of the head of the bolt to be tested.

[0014] Further, a dismounting sleeve is detachably connected with the connector, the outer circumferential surface of the locking sleeve is in a non-rotational body shape, and the dismounting sleeve is provided with a dismounting groove matched with the outer circumferential surface of the locking sleeve.

[0015] Compared with the prior art, the application has the following beneficial technical effects.

[0016] 1. The design of the non-rotational body-shaped clamping assembly and the locking ring matched with the inclined surface cooperates to convert the axial locking force of the locking sleeve into radial contraction clamping force. When the locking sleeve is tightened, the locking ring is pressed downwards, the second inclined surface of the locking ring interacts with the first inclined surface of the clamp block, and the two clamp blocks are forced to synchronously and uniformly contract in the radial direction, thereby generating strong and stable clamping force on the threaded segment of the bolt, and the problem of bolt slipping under large torque is avoided.

[0017] 2. The clamping assembly is fixed to the placing seat through the mounting groove, the through slot design of the locking ring and the locking sleeve ensures that the bolt head and the test part are exposed, and the clamping force is concentrated on the threaded segment, thereby ensuring that almost all the applied torque is used for torsional deformation of the bolt itself until the bolt is broken, and reducing the torque loss or measurement error caused by the friction or eccentric clamping of the clamp.

[0018] 3. The clamping assembly of the non-rotating body structure cooperates with the mounting groove, effectively preventing the clamping assembly from rotating during the test process, ensuring the constant direction of the clamping force, and further improving the stability under large torque impact.

[0019] 4. The abutting block and the backing plate serve as replaceable adjusting parts or vulnerable parts. When the groove bottom is worn or needs to be adjusted in height due to use, only the low-cost abutting block or backing plate needs to be replaced, effectively protecting the placement seat, greatly prolonging the service life of the main tooling, and reducing the long-term maintenance cost.

[0020] 5. The dismounting sleeve provides a special tool for dismounting the locking sleeve. This design integrates the dismounting function into the test device itself, eliminating the need for additional tools and improving the convenience of maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective view of the failure torque test tooling.

[0022] Figure 2 It is an exploded view of the failure torque test tooling.

[0023] Figure 3 It is a perspective view of the locking ring.

[0024] Figure 4 It is a perspective view of the failure torque test device.

[0025] Figure 5 It is a structural sectional view of the joint assembly adapter, dismounting sleeve.

[0026] 100, failure torque test tooling; 110, placement seat; 111, mounting groove; 120, clamping assembly; 121, clamping block; 122, half hole; 123, first inclined surface; 130, locking ring; 131, first through groove; 132, second inclined surface; 140, locking sleeve; 141, second through groove; 150, backing plate; 160, abutting block; 200, workbench; 210, machine head; 220, joint; 230, adapter; 231, groove; 240, dismounting sleeve; 241, dismounting groove. DETAILED DESCRIPTION

[0027] The utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0028] In the following embodiments, the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the utility model, but cannot be understood as limiting the utility model.

[0029] In the description of the utility model, it needs to be understood that the terms: center, longitudinal, transverse, length, width, thickness, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise and other indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, therefore cannot be understood as the limitation of the utility model.In addition, the terms: first, second and the like are only for the description purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the shown technical features.In the description of the utility model, unless otherwise explicitly specified and limited, the terms: mounting, connecting, connection and the like should be understood in a broad sense, and the person skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific circumstances. Embodiment one

[0030] Reference Figures 1 to 3 A kind of destruction torque test tool 100, the tool mainly includes placing seat 110, clamping assembly 120, locking ring 130, locking sleeve 140, and can selectively be equipped with backing plate 150 and resistance block 160.

[0031] The placing seat 110 is the base of the tool, the center of which is processed with mounting groove 111, and the outer periphery of the placing seat 110 is provided with external threads.

[0032] The clamping assembly 120 is the core clamping component, and the outer side thereof is in the shape of a square or other non-rotating body.The assembly is made up of two symmetrical clamping blocks 121.The inner side of each clamping block 121 is processed with a half-hole 122 in the shape of a semicircle.When the two clamping blocks 121 are closed, the two half-holes 122 together form a complete threaded hole for screwing in the bolt to be tested.On the upper outer side of the two clamping blocks 121, there are respectively first inclined surfaces 123 that are inclined and symmetrically distributed.

[0033] The locking ring 130 is a ring-shaped part that is sleeved on the upper part of the clamping assembly 120.The center of the locking ring 130 is provided with a first through groove 131, and the shape of the first through groove 131 matches the outer contour of the non-rotating body on the upper part of the clamping assembly 120, so that the top of the clamping assembly 120 can pass through the first through groove 131.The inner wall of the first through groove 131 is processed with a second inclined surface 132 that matches the first inclined surface 123 of the clamping block 121 at the position corresponding to the first inclined surface 123.

[0034] The locking sleeve 140 is a cylindrical member with internal threads, which is connected by screwing the internal threads with the external threads on the lower part of the placing seat 110.The top center of the locking sleeve 140 is provided with a second through groove 141 that is smaller than the size of the inner wall of the locking sleeve 140, so that the top of the clamping assembly 120 and the locking ring 130 can be exposed, and when the locking sleeve 140 is tightened, the inner top wall thereof will press down the locking ring 130.

[0035] To enhance the adaptability of the tool, a shim 150 can be provided, which is placed at the bottom of the installation slot 111 of the placement seat 110, and various standard thicknesses can be selected. By replacing shims 150 of different thicknesses, the height of the clamping assembly 120 installed above it can be adjusted as a whole, thereby conveniently controlling the exposed length of the bolt head. In addition, a stop block 160 can also be provided at the center of the bottom of the installation slot 111 of the placement seat 110. When the bolt is fully screwed into the threaded hole of the clamping assembly 120, the end of its shaft will hit the stop block 160, thereby limiting the axial movement and preventing the bolt from moving during the twisting process.

[0036] The working principle of the test tool is as follows: in use, first, according to the bolt length, select the shim 150 and place it in the placement seat 110. Place the two clamping blocks 121 in the installation slot 111, put on the locking ring 130, and then preliminarily screw on the locking sleeve 140. Screw the bolt to be tested into the threaded hole formed by the clamping block 121 until it contacts the stop block 160. Finally, use a tool to tighten the locking sleeve 140. The locking sleeve 140 presses down the locking ring 130, and the second inclined surface 132 of the locking ring 130 interacts with the first inclined surface 123 of the clamping block 121 to convert the downward pressure into radial clamping force, forcing the two clamping blocks 121 to tightly embrace the bolt, generating a large anti-rotation friction torque. This design is particularly suitable for large-sized, high-strength bolts, which can effectively prevent slipping during testing. Example Two

[0037] Reference Figure 4 and Figure 5 This embodiment provides a breaking torque test device, which includes a workbench 200 and a liftable head 210. The workbench 200 is used to install and fix the above-mentioned breaking torque test tool 100. The head 210 is internally equipped with a torque sensor, and the bottom of the head 210 is connected with a connector 220. The connector 220 is detachably installed with an adapter head 230. The adapter head 230 can be replaced with different specifications as needed. The end of each adapter head 230 is processed with a groove 231 that perfectly fits the head of a specific bolt (such as an internal hexagon, an external hexagon, a cross slot, etc.), ensuring that the torque is effectively and losslessly transmitted.

[0038] In addition, the device is also equipped with a dedicated disassembly sleeve 240. One end of the disassembly sleeve 240 can be connected with the connector 220 of the head 210, and the other end is internally processed with a special-shaped disassembly groove 241. The shape of the disassembly groove 241 is adapted to the external non-rotating body shape of the locking sleeve 140 of the tool. When it is necessary to tighten or loosen the locking sleeve 140, the disassembly sleeve 240 can be installed on the connector 220, and the controllable rotating force provided by the head 210 can be used to operate the locking sleeve 140, which is labor-saving and efficient.

[0039] The protection scope of the utility model includes but is not limited to the above implementation manners, the protection scope of the utility model is subject to the claims, any replacement, deformation, improvement of the technical personnel in the art to the present technology is easily thought of and falls into the protection scope of the utility model.

Claims

1. A breakaway torque test fixture characterized by, The device comprises a placing seat (110), a clamping assembly (120), a locking ring (130) and a locking sleeve (140); The clamping assembly (120) is in the shape of a non-rotation body in cross section, comprising two clamping blocks (121), each of which is provided with a half-hole (122) on the opposite surface, and the two half-holes (122) form a threaded hole for connecting the bolt to be tested after the two clamping blocks (121) are combined; the placing seat (110) is provided with a mounting groove (111) for mounting the clamping assembly (120). The clamping block (121) is provided with a first inclined surface (123), and the first inclined surfaces (123) of the two clamping blocks (121) are symmetrically distributed; the locking ring (130) is placed on the clamping assembly (120), and the locking ring (130) is provided with a first through groove (131) in the middle for exposing the top of the clamping assembly (120), and the inner walls on both sides of the first through groove (131) are second inclined surfaces (132) matched with the first inclined surfaces (123). The locking sleeve (140) is threadedly connected with the placing seat (110), and the locking sleeve (140) is provided with a second through groove (141) at the top for exposing the top of the clamping assembly (120); when the locking sleeve (140) is tightened downward, the locking ring (130) is compressed, so that the second inclined surfaces (132) of the locking ring (130) are matched with the first inclined surfaces (123) of the clamping blocks (121), thereby locking the two clamping blocks (121).

2. A breakaway torque test fixture as set forth in claim 1, wherein, The threaded hole is a through hole, and the breaking torque test tool (100) further comprises an abutting block (160) located directly below the threaded hole for abutting against the bottom of the bolt to be tested.

3. A break torque test fixture according to claim 1 or 2, wherein, It further comprises a backing plate (150) mounted in the mounting groove (111) for backing under the clamping assembly (120).

4. A break torque testing device, characterized by, The device comprises a workbench (200) and a liftable machine head (210), the breaking torque test tool (100) as claimed in any one of claims 1-3 is mounted on the workbench (200), the machine head (210) is used for applying torque to the bolt to be tested during the test, and is internally provided with a torque sensor and connected with a connector (220), the connector (220) is detachably connected with an adapter head (230), and the adapter head (230) is provided with a groove (231) matched with the shape of the head of the bolt to be tested.

5. A break torque testing device as claimed in claim 4, wherein, The device further comprises a dismounting sleeve (240) detachably assembled with the connector (220), and the outer peripheral surface of the locking sleeve (140) is in the shape of a non-rotation body in cross section, and the dismounting sleeve (240) is provided with a dismounting groove (241) matched with the outer peripheral surface of the locking sleeve (140).

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