Special measuring device for steel strain
By designing a dedicated strain measurement device for steel, and utilizing components such as a grating ruler and a return spring to achieve strain measurement, the problems of difficult deviation control and low efficiency in traditional methods have been solved, thus realizing efficient and accurate strain measurement.
Patent Information
- Application Number
- CN202520620752.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-03
AI Technical Summary
Traditional measurement methods are difficult to control tensile strain deviation, have low efficiency, and ordinary extensometers cannot achieve large strain measurements.
A special strain measuring device for steel was designed, including a frame, guide rod, positioning block, return spring, clamping rod and grating ruler. The displacement is detected in real time by the grating ruler, and the strain is measured by combining the return spring and lever arm. The results are displayed on an LCD screen.
It improved measurement accuracy and work efficiency, reduced operational risks, and enabled rapid and accurate observation of strain variables.
Smart Images
Figure CN223856415U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of steel physical performance detection, and particularly relates to a special measuring device for steel strain. BACKGROUND
[0002] Standard GB / T4160-2004 steel strain aging sensitivity test test method (Charpy impact method) needs to adopt tensile strain for sample 12mm*12mm*Lmm (standard sample), generally low carbon steel residual strain is 10%, low alloy steel strain is 5%, and the deviation is all ±0.5%.
[0003] At present, the traditional measuring method is to make marks at both ends of the gauge length, and the tensile strain is controlled by the manual measurement method of the vernier caliper, deviation control is difficult, work efficiency is low, and moreover, each tensile sample requires processing of three impact samples, the size (standard) of each impact sample is 10mm*10mm*55mm, and the gauge length of the tensile sample requires 170mm, so the ordinary extensometer cannot realize large strain measurement.
[0004] Therefore, it is necessary to develop a special measuring device for steel strain. CONTENT OF THE UTILITY MODEL
[0005] The utility model discloses a special measuring device for steel strain, has steel strain measurement function, solves the problem that the tensile strain of the manual measurement method of the vernier caliper of prior art is controlled, deviation control is difficult, work efficiency is low and the ordinary extensometer cannot realize large strain measurement.
[0006] In order to achieve the above object, the utility model adopts the technical scheme, and the utility model provides a special measuring device for steel strain, which comprises a frame body, a guide rod is vertically arranged in the frame body, a positioning block is arranged on the guide rod, a reset spring is connected to the positioning block, the reset spring is sleeved on the guide rod, a clamping rod penetrates through the positioning block, a force arm is arranged on the positioning block, and a grating ruler is arranged on one side of the front end of the frame body.
[0007] As preferred, the number of positioning blocks is two and arranged in an upper and lower arrangement, and the reset spring is connected to the top end of the top positioning block and the bottom end of the bottom positioning block.
[0008] As preferred, the positioning block is sleeved on the guide rod, and a perforation is arranged on one side of the positioning block.
[0009] As preferred, the clamping rod is provided with a handle at one end, and a spring is arranged between the handle of the clamping rod and the positioning block.
[0010] As preferred, the frame body is provided with a display at the top.
[0011] As preferred, the force arm is provided with a blade at the end.
[0012] Compared with the prior art, the utility model has the advantages and positive effects that,
[0013] 1, the utility model discloses a quick clamping device, and the steel strain measurement function is solved, the problem of the vernier caliper manual measurement method control tensile strain, deviation control difficult, low work efficiency and ordinary extensometer can not realize big strain measurement.
[0014] 2, the utility model discloses a quick clamping device, and the steel strain measurement function is solved, the problem of the vernier caliper manual measurement method control tensile strain, deviation control difficult, low work efficiency and ordinary extensometer can not realize big strain measurement. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be to the embodiment description needed to use the drawing a simple introduction, obviously, the following description in the drawing is some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor intensity, can also obtain other drawings according to these drawings.
[0016] Fig. 1 It is a kind of steel strain special measuring device's perspective view;
[0017] Fig. 2 It is a kind of steel strain special measuring device's side view;
[0018] In the above figure, 1, frame body, 2, guide rod, 3, positioning block, 4, reset spring, 5, clamping rod, 6, handle, 7, spring, 8, force arm, 9, blade, 10, grating ruler, 11, display. DETAILED DESCRIPTION
[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be to the embodiment description needed to use the drawing a simple introduction, obviously, the following description in the drawing is some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor intensity, can also obtain other drawings according to these drawings.
[0020] In the following description, a lot of specific details are set forth in order to fully understand the utility model, however, the utility model can also be implemented in other ways different from the description herein, therefore, the utility model is not limited to the specific embodiments disclosed in the following disclosure.
[0021] Embodiment 1, as Figs. 1-2As shown, a special steel strain measuring device, comprising a frame body 1, the frame body 1 as the main body support structure of the device, provides installation reference for each component, the frame body 1 is welded by high-strength steel material, ensures the rigidity of the overall structure, can stably bear the tensile load in the test process, the frame body 1 is designed in an open type at the front end, facilitating the loading and unloading operation of the sample blank.
[0022] The frame body 1 is vertically provided with a guide rod 2 inside, the guide rod 2 is provided with a positioning block 3, the positioning block 3 is a double-positioning module symmetrically arranged up and down, constituting a dynamic measurement reference system. The frame body 1 as the guide mechanism of the positioning block 3 adopts a chrome-plated guide rod, the moving track of the positioning block 3 is completely coincided with the tensile axis of the testing machine, eliminating the lateral deviation error.
[0023] The positioning block 3 is connected with a reset spring 4, the reset spring 4 provides a dynamic reset force, maintaining the stability of the measurement reference, the reset spring 4 is sleeved on the guide rod 2, the reset spring 4 adopts 65Mn spring 7 steel treated by high-temperature tempering, the pre-tightening force is adjustable in the range of 5-20N, and is automatically reset to the initial calibration position after the tensile unloading.
[0024] The positioning block 3 is penetrated by a clamping rod 5, the clamping rod 5 is used for clamping steel materials, the positioning block 3 is provided with a force arm 8, the force arm 8 is made of 7075 aluminum alloy material, so that the strain transmission has no hysteresis, the frame body 1 is provided with a grating ruler 10 at one side of the front end, the grating ruler 10 is a grating displacement sensor, which can detect the moving distance in real time and has good measurement accuracy.
[0025] The specific design of the above key components will be described below:
[0026] The number of the positioning block 3 is two and arranged in an up-and-down manner, the top positioning block 3 top end and the bottom positioning block 3 bottom end are connected with the reset spring 4. The positioning block 3 is sleeved on the guide rod 2, two sets of positioning blocks 3 are sleeved on the guide rod 2, the spacing is adjustable in the range of 50-200mm, the dynamic balance is formed through the reset springs 4 at the top and bottom, the cooperation gap between the positioning block 3 inner hole and the guide rod 2 is ≤0.02mm, a copper-based graphite inlaid type linear bearing is adopted, the friction coefficient is reduced to below 0.08, one side of the positioning block 3 is provided with a through hole, the positioning block 3 is laterally provided with a Φ12mm through hole, allowing the clamping rod 5 to penetrate, and the through hole inner wall is plated with hard chromium.
[0027] One end of the clamping rod 5 is provided with a handle 6, the outer side of the handle 6 is provided with anti-slip rubber, a spring 7 is arranged between the handle 6 on the clamping rod 5 and the positioning block 3, the spring 7 provides a constant clamping force, the clamping rod 5 is provided with a locking groove at the end, and the locking groove is rotated to realize quick locking / release.
[0028] The frame body 1 is provided with a display 11 at the top, the display 11 is a liquid crystal display screen, the measurement data can be directly monitored through digital display, instead of the manual measurement reading mode.
[0029] The force arm 8 is provided with a blade 9 at the end, which is convenient for clamping and replacement.
[0030] Usage example:
[0031] The operation handle 6 compresses the spring 7, the clamping rod 5 passes through the perforation of the positioning block 3, and the sample is pressed in the locking groove. The blade 9 is clamped on the sample surface and penetrates into the oxide layer of the sample surface under the action of the pre-tightening force, and a stable contact point is established.
[0032] When the tensile testing machine is loaded, the sample deformation drives the force arm 8 to rotate around the fulcrum, and pushes the positioning block 3 to slide along the guide rod 2. The grating ruler 10 detects the displacement ΔL in real time, calculates the strain value through the formula ε=(ΔL / L0)×100%, and displays it on the display 11.
[0033] After unloading, the reset spring 4 pushes the positioning block 3 back to the initial position, and the display 11 is cleared for the next measurement.
[0034] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings. The specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the existing technology. The mechanical parts and equipment adopt conventional models in the existing technology. The circuit connection adopts the conventional connection mode in the existing technology. The contents not described in detail in the description belong to the existing technology known to those skilled in the art.
[0035] The above is only a preferred embodiment of the utility model, and is not limited in other forms. Any skilled person in the art can change or modify the above disclosed technical content to equivalent embodiments applied to other fields. However, any simple modification, equivalent change and modification of the above embodiments without departing from the technical scheme of the utility model, according to the technical essence of the utility model, still belongs to the protection scope of the technical scheme of the utility model.
Claims
1. A special device for measuring the strain of steel, characterized in that, Including frame body, the frame body is internally arranged with guide rod vertically, the guide rod is provided with positioning block, the positioning block is connected with reset spring, the reset spring is sleeved on the guide rod, the positioning block is penetrated with clamping rod, the positioning block is provided with force arm, the frame body is provided with grating ruler on one side of the front end.
2. The apparatus for measuring strain of a steel material according to claim 1, wherein The number of the positioning blocks is 2 and arranged in upper and lower rows, the top positioning block top end and the bottom positioning block bottom end are connected with reset spring.
3. The apparatus for measuring strain of a steel material according to claim 2, wherein The positioning block is sleeved on the guide rod, one side of the positioning block is provided with perforation.
4. The apparatus for measuring strain of a steel material according to claim 1, wherein One end of the clamping rod is provided with handle, the clamping rod is provided with spring between the handle and the positioning block.
5. The apparatus for measuring strain of a steel material according to claim 1, wherein The frame body top is provided with display.
6. The apparatus for measuring strain of a steel material according to claim 1, wherein The force arm terminal is provided with blade.