Fastener tensile test tool

Abstract

The utility model discloses a fastener tensile test tooling, the test tooling includes two sets of identical clamp assembly, each set of clamp assembly includes a clamp body, the top of the clamp body is in threaded connection with a connecting rod, the inside of the clamp body is hollow and is provided with a working cavity, the inside of the working cavity is provided with an annular positioning step, and the outer wall of the clamp body is also provided with an inner through port. The inner through opening communicates with the working cavity, and a positioning screw hole is further formed in the position, close to the top, of the clamp body. An upper positioning pad and a lower threaded seat which are used for accommodating and fixing a fastener to be tested are also arranged in the working cavity, the fastener to be tested is arranged between the upper positioning pad and the lower threaded seat, and the upper positioning pad and the lower threaded seat are axially positioned through an annular positioning step; a protective cover is arranged outside the clamp body, an outer through opening corresponding to the inner through opening is formed in the protective cover, and a limiting groove matched with the positioning screw hole is formed in the portion, close to the top, of the protective cover. The device is simple in structure, convenient to operate, safe, reliable and high in repeated utilization rate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a stretching test tooling technical field, concretely relates to a fastener stretching test tooling. BACKGROUND

[0002] Fasteners are widely used in mechanical, construction and aerospace fields, and its main function is to connect, fix and transmit force. The quality of fasteners directly affects the safety and stability of equipment, and the tensile property detection of fasteners is an important means to evaluate the mechanical properties of fasteners under tensile load. These performance indicators are crucial for the safety, reliability and durability of fasteners in various applications to ensure that fasteners can meet the design requirements and safety in use when subjected to tensile load. The tensile property detection of fasteners requires the use of a stretching test tooling to clamp and position, and the tensile detection is carried out by an electronic testing machine.

[0003] At present, the fastener stretching test tooling for company production and scientific research has the following problems: the existing fastener stretching test tooling is time-consuming and laborious in clamping and positioning operation process for each fastener; the existing fastener stretching test tooling lacks a protection device, and the broken fastener is easy to fly out instantly during the stretching test process, which poses a danger to the safety of test personnel or other objects, and has certain safety hazards; the inner hole thread of the fastener screw part used for screwing in the existing fastener stretching test tooling is prone to tooth shape deformation and tooth decay during use, which causes the stretching test tooling to be unable to be used normally, the repair of the screw thread is difficult, and the coaxiality of the repaired tooling is affected, and the repeated use rate of the stretching test tooling is low. UTILITY MODEL CONTENT

[0004] In order to solve the problems raised in the background art, the purpose of the utility model is to provide a fastener stretching test tooling, which is time-saving and labor-saving in operation process, simple in operation, high in safety, and high in repeated use rate.

[0005] To achieve the above object, the utility model provides the following technical scheme: a fastener tensile test tool, the test tool includes two groups of same clamp components, each group of clamp components includes a clamp body, the top of clamp body is connected with connecting rod through screw thread, and the inside is hollow and is equipped with working cavity, and the inside of working cavity is equipped with annular positioning step, and the outer wall of clamp body is also equipped with inner through -hole, and the inner through -hole is connected with working cavity, and the top of clamp body is also equipped with positioning screw hole; the inside of working cavity is also equipped with upper positioning pad and lower threaded seat for containing fastener to be measured, and the fastener to be measured is arranged between upper positioning pad and lower threaded seat, and upper positioning pad and lower threaded seat are positioned through annular positioning step; the outside of clamp body is equipped with protective cover, the protective cover is equipped with outer through -hole corresponding with inner through -hole, the top of protective cover is equipped with limiting slot matched with positioning screw hole, and positioning screw is installed in limiting slot and positioning screw hole, and when working, the position of protective cover is changed through limiting slot, after the inner through -hole is sealed, the positioning screw is fixed.

[0006] Further, the protective cover and the clamp body are coaxial sleeve structure.

[0007] The outer side of the protective cover is provided with a locking screw, and the protective cover is moved along the direction of the positioning groove, and after covering the inner through -hole, the protective cover and the clamp body are locked by the locking screw and the positioning screw.

[0008] The surface of the upper positioning pad is provided with a groove for fixing the head of the fastener to be measured, and the center of the groove is provided with a center hole for penetrating the fastener to be measured, and the surface of the lower threaded seat is provided with a threaded hole for connecting the fastener to be measured.

[0009] The clamp body is made of high-quality alloy steel material 40Cr.

[0010] When preparing for testing, the tester first inserts the connecting rod in each clamp assembly

[0011] The fastener screw rod is inserted from the top of the upper positioning pad, the head of the fastener is fixed in the groove, the fastener screw rod part is screwed and connected with the threaded hole of the lower threaded seat, then the upper positioning pad and the lower threaded seat fixed with the fastener are pushed into the working cavity of the upper and lower clamp bodies through the inner through -hole of the clamp body, the inner through -hole is locked by rotating the protective cover with hand, then the locking screw on the protective cover is tightened to fix the protective cover, and the tensile property test of the fastener is started.

[0012] The utility model has the advantages of simple structure, convenient operation, safety and reliability, and high reusability.

[0013] The utility model adopts high-quality alloy steel 40Cr as the material of the tensile testing tool, and the hardness is (45.0-50.0) HRC, so that the tensile testing tool has higher hardness, strength and wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure 2 This is a schematic structural diagram of a single set of clamp components in the present invention.

[0016] Figure 3 for Figure 2 Schematic diagram of the rear view structure.

[0017] Figure 4 It is a structural schematic diagram of the clamp body in the utility model.

[0018] Figure 5 It is a structural schematic diagram of the protective cover in the utility model.

[0019] Figure 6 This is a schematic diagram of the connection structure of the upper positioning pad, the fastener to be tested and the lower threaded seat in the utility model.

[0020] Figure 7 yes Figure 6 Schematic diagram of the structure of the middle and upper positioning pad.

[0021] Figure 8 yes Figure 1 Schematic diagram of the rear view structure.

[0022] Attachment Figures 1-8 1. Connecting rod; 2. Fixture body; 3. Working chamber; 4. Annular positioning step; 6. Upper positioning pad; 7. Lower threaded seat; 8. Protective cover; 9. Limiting groove; 12. Locking screw; 13. Fixture assembly; 14. Fastener to be tested; 15. Positioning screw; 16. Locking screw hole; 17. Internal port; 18. External port; 19. Center hole; 20. Groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See attached Figures 1-8The utility model discloses a kind of fastener tensile test tool, the test tool includes two groups of identical clamp assembly 13, each clamp assembly 13 includes a clamp body 2, the clamp body 2 top is connected with connecting rod 1, the hollow work cavity 3 of being provided with in clamp body 2, annular positioning step 4 is provided in work cavity 3, clamp body 2 outer wall is additionally provided with inner through hole 17, inner through hole 17 is communicated with work cavity 3, clamp body 2 is additionally provided with positioning screw hole 16 close to top;Work cavity 3 is additionally provided with for accommodating the upper positioning pad 6 and lower threaded seat 7 of fixed fastener 14 to be measured, fastener 14 to be measured is placed between upper positioning pad 6 and lower threaded seat 7, and upper positioning pad 6 and lower threaded seat 7 are positioned axially by annular positioning step 4;The clamp body 2 outside is provided with protective cover 8, the protective cover 8 is provided with outer through hole 18 corresponding with inner through hole 17, the protective cover 8 is provided with limit groove 9 matched with positioning screw hole 16 close to top, and positioning screw 15 is additionally installed in limit groove 9 and positioning screw hole 16, when working, the position of protective cover 8 is changed along the trajectory of limit groove 9, after inner through hole 17 is sealed, fastening positioning screw 15 is satisfied.

[0025] The protective cover 8 is additionally provided with locking screw 16 outside, and the protective cover 8 is moved along the direction of positioning groove 9, after inner through hole is covered, the protective cover 8 and clamp body are locked by locking screw 16 and positioning screw 15.

[0026] As a kind of technical optimization scheme of the utility model, the diameter of the clamp body 2 is 130 millimeters, and the wall thickness is 35mm, so that the clamp body 2 has higher strength.

[0027] Reference Figure 2 The protective cover 8 and the clamp body 2 are coaxially sleeved, and the size of the protective cover through hole is greater than the size of the clamp body through hole.

[0028] As a kind of technical optimization scheme of the utility model, the protective cover 8 and the clamp body 2 are coaxially sleeved, and the limit groove 9 on the protective cover 8 and the positioning screw hole 16 outside the clamp body 2 are matched by positioning screw 15, so that the tester can open the protective cover 8, so that the tester can place or take out the fastener after testing and adjust the upper positioning pad 6 and lower threaded seat 7.

[0029] Reference Figure 6 And Figure 7The upper positioning pad 6 is provided with a groove 20 for fixing the head of the fastener to be tested, and the center of the groove 20 is provided with a center hole 19 for penetrating the fastener to be tested, and the surface of the lower threaded seat 7 is provided with a threaded hole for connecting the fastener 14 to be tested, and the upper positioning pad 6 and the lower threaded seat 7 are made into different specification connecting sleeves matched with the fastener. The tester selects the matched connecting sleeve according to the different specifications of the fastener to be tested, and easily clamps and fixes the fastener with both hands, which effectively overcomes the clamping difficulty of the original tensile test tool.

[0030] Reference Figure 1 The tensile test tool is made of high-quality alloy steel material, the tensile test tool is made of high-quality alloy steel 40Cr, and the hardness is (45.0-50.0) HRC, so that the tensile test tool has high hardness, strength and wear resistance, and the reusability of the tensile test tool can be improved.

[0031] The working principle and use process of the utility model are as follows: in use, first, test preparation is carried out, the test personnel first clamp and fix the clamp body 2 through the connecting rod 1 and the wedge-shaped clamp jaw opening of the tensile testing machine, the test personnel insert the fastener screw rod from the top of the upper positioning pad 6, the fastener head is fixed in the groove, the fastener screw rod is connected in the threaded hole of the lower threaded seat 7 in a screwed manner, then the upper positioning pad 6 and the lower threaded seat 7 connected with the fastener are pushed into the working cavity 3 in the clamp body 2 for positioning, the inner opening is locked by rotating the protective cover 8 by hand, then the locking screw 12 and the positioning screw 15 on the protective cover are tightened to fix the protective cover 8, and the tensile performance test of the fastener to be tested is started.

[0032] In the test tool, the test personnel can easily clamp and fix the measured fastener outside the tensile tool with both hands, then the connecting sleeve for fixing the fastener is pushed into the working cavity of the clamp body for tensile operation, the tool has simple structure and convenient test operation, the protective cover ensures the safety of the test personnel, the material selection of the clamp body and the connecting sleeve improves the reusability of the tool, and only one test personnel can easily operate and install.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

[0034] The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A fastener tensile testing tool, characterized by: The test fixture includes two groups of identical fixture assemblies, each group of fixture assemblies includes a fixture body, the top of the fixture body is threadedly connected to a connecting rod, the internal hollow is provided with a working chamber, the working chamber is provided with an annular positioning step, the outer wall of the fixture body is also provided with an internal opening, the internal opening is connected to the working chamber, and the fixture body is also provided with a positioning screw hole near the top; the working chamber is also provided with an upper positioning pad and a lower threaded seat for accommodating and fixing the fastener to be tested, the fastener to be tested is placed between the upper positioning pad and the lower threaded seat, and the upper positioning pad and the lower threaded seat are axially positioned by the annular positioning step; a protective cover is provided on the outside of the fixture body, and an external opening corresponding to the internal opening is provided on the protective cover, and a limiting groove matching the positioning screw hole is provided near the top of the protective cover, and a positioning screw is installed in the limiting groove and the positioning screw hole. During operation, the protective cover changes its position through the limiting groove to seal the internal opening and tighten the positioning screw.

2. The fastener tensile testing tool according to claim 1, characterized in that: The protective cover and the fixture body are coaxially fitted.

3. The fastener tensile testing tool according to claim 1, characterized in that: A locking screw is provided on the outside of the protective cover. After the protective cover moves along the positioning groove and covers the inner opening, the protective cover and the clamp body are locked again by the locking screw.

4. The fastener tensile testing tool according to claim 1, characterized in that: The upper positioning pad surface is provided with a groove for fixing the head of the fastener to be tested, the center of the groove is provided with a center hole for passing the fastener to be tested, and the lower threaded seat surface is provided with a threaded hole for connecting the fastener to be tested.

5. The fastener tensile testing tool according to claim 1, characterized in that: The clamp body is made of high-quality alloy steel 40Cr.

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