CN215767971U - Chuck for mechanical testing machine - Google Patents
Chuck for mechanical testing machine Download PDFInfo
- Publication number
- CN215767971U CN215767971U CN202122132358.8U CN202122132358U CN215767971U CN 215767971 U CN215767971 U CN 215767971U CN 202122132358 U CN202122132358 U CN 202122132358U CN 215767971 U CN215767971 U CN 215767971U
- Authority
- CN
- China
- Prior art keywords
- sample
- clamping
- blind groove
- testing machine
- clamping plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to the field of tensile experimental equipment, in particular to a chuck for a mechanical tester. The device comprises four clamping plates with the same structure, wherein every two clamping plates are a group and are buckled at two ends of a test sample; one end of each group of clamping plates, which is far away from the sample, clamps the clamping plates through two groups of hydraulic machines; a blind groove matched with the end part of the sample in shape is arranged in the center of the clamping end of each clamping plate, the center of the blind groove is positioned on the center line of the sample, and the depth of the blind groove is slightly smaller than half of the thickness of the sample; and the clamping plate is provided with a connecting pin for connecting the testing machine, and the connecting pin is positioned on the reverse side of the blind groove. The blind groove is internally provided with grains for increasing the clamping friction force. During tensile test, the coincidence of the longitudinal axis of the sample and the central connecting line of the upper clamp and the lower clamp can be ensured after the sample is clamped, and the depths of the clamped sample by the upper clamp plate and the lower clamp plate are the same, so that the eccentric force and the slippage in the test are avoided, and the accuracy of mechanical inspection is improved.
Description
Technical Field
The utility model relates to the field of tensile experimental equipment, in particular to a chuck for a mechanical tester.
Background
The tensile test is the most basic test of the mechanical properties of materials, and for the mechanical properties of general steel, the tensile test is required to be carried out so as to research the quality indexes of the steel, such as yield strength, tensile strength, elongation after fracture and the like. However, when a chuck of the existing stretching equipment clamps a mechanical standard sample, the clamping sample cannot be vertical, so that the longitudinal axis of the sample coincides with the central connecting line of an upper clamp and a lower clamp; the upper and lower clamps clamp the sample with the same depth. When centre gripping mechanics sample, if anchor clamps can't keep sample and axis of ordinates perpendicular, and the centre gripping degree of depth corresponds from top to bottom, along with tensile slowly increasing, the sample can receive certain eccentric force effect, certain slip still can appear, causes the clamping-force inhomogeneous of anchor clamps to the sample to the mechanical properties of steel can't be measured to the accuracy.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problems in the prior art, the utility model discloses a chuck for a mechanical testing machine.
The specific technical scheme provided by the utility model is as follows:
a chuck for a mechanical test machine comprises four clamping plates with the same structure, wherein every two clamping plates are a group and are buckled at two ends of a test sample; one end of each group of clamping plates, which is far away from the sample, clamps the clamping plates through two groups of hydraulic machines;
a blind groove matched with the end part of the sample in shape is arranged in the center of the clamping end of each clamping plate, the center of the blind groove is positioned on the center line of the sample, and the depth of the blind groove is slightly smaller than half of the thickness of the sample; and the clamping plate is provided with a connecting pin for connecting the testing machine, and the connecting pin is positioned on the reverse side of the blind groove.
Furthermore, the blind groove is internally provided with grains for increasing the clamping friction force, so that the clamping force required by the sample is ensured.
Furthermore, the connecting pin is trapezoidal, and the thickness of the connecting end of the connecting pin and the testing machine is larger than the width of the connecting end of the connecting pin and the clamping plate.
The utility model has the following beneficial effects:
the chuck for the mechanical testing machine provided by the utility model is used for clamping a sample in the blind grooves of the four clamping plates, during a tensile test, the longitudinal axis of the sample can be ensured to be superposed with the central connecting line of the upper clamp and the lower clamp after the sample is clamped, and the depths of the samples clamped by the upper clamp and the lower clamp are the same, so that the eccentric force and the slippage in the test are avoided, and the accuracy of the mechanical test is improved.
Drawings
FIG. 1 is a view showing an operating state of a collet for a mechanical testing machine according to the present invention;
FIG. 2 is a front view of a collet for a mechanical testing machine of the present invention;
fig. 3 is a three-dimensional view of the collet for a mechanical testing machine of the present invention.
In the figure: 1. a splint; 2. a blind groove; 3. a connecting pin; 4. and (4) sampling.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, the chuck for a mechanical testing machine according to the embodiment of the present invention includes four clamping plates 1 with the same structure, where the clamping plates 1 are two-by-two and are fastened to two ends of a sample 4; one end of each group of clamping plates 1, which is far away from the sample 4, clamps the clamping plates 1 through two groups of hydraulic machines;
a blind groove 2 matched with the end part of the sample 4 in shape is arranged in the center of the clamping end of each clamping plate 1, the center of the blind groove 2 is positioned on the center line of the sample 4, and the depth of the blind groove 2 is slightly smaller than half of the thickness of the sample 4, so that the longitudinal clamping depths of the upper clamp and the lower clamp are ensured to be the same; the thickness of the test piece can be specifically designed according to the thickness of the test piece 4, or the depth of the test piece is 0.5mm, so that the test piece can be prevented from falling off during stretching; the blind groove 2 is internally provided with grains for increasing the clamping friction force, so that the clamping force required by the sample 4 is ensured. The clamp plate 1 is provided with a connecting pin 3 for connecting with the testing machine, and the connecting pin 3 is positioned on the reverse side of the blind groove 2. Preferably, as shown in fig. 3, the connecting pin 3 is trapezoidal, the thickness of the connecting end of the connecting pin and the testing machine is 30mm, and the width of the connecting end of the connecting pin and the clamping plate is 20mm, so that the connecting pin 3 is prevented from being separated when being connected with the testing machine.
Preferably, the size of the splint 1 is 90mm in length, 90mm in width and 20mm in thickness; the section of the blind groove 2 is square, and the size is 30mm in length, 30mm in width and 0.5mm in thickness.
During tensile test, the coincidence of the longitudinal axis of the sample 4 and the central connecting line of the upper clamp and the lower clamp can be ensured after the sample 4 is clamped, and the depths of the sample 4 clamped by the upper clamp plate and the lower clamp plate are the same, so that the eccentric force and the slippage in the test are avoided, and the accuracy of mechanical inspection is improved.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the utility model. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (3)
1. The utility model provides a chuck for mechanical testing machine which characterized in that: the device comprises four clamping plates with the same structure, wherein every two clamping plates are a group and are buckled at two ends of a test sample; one end of each group of clamping plates, which is far away from the sample, clamps the clamping plates through two groups of hydraulic machines;
a blind groove matched with the end part of the sample in shape is arranged in the center of the clamping end of each clamping plate, the center of the blind groove is positioned on the center line of the sample, and the depth of the blind groove is slightly smaller than half of the thickness of the sample; and the clamping plate is provided with a connecting pin for connecting the testing machine, and the connecting pin is positioned on the reverse side of the blind groove.
2. The collet for a mechanical testing machine according to claim 1, wherein: the blind groove is internally provided with grains for increasing the clamping friction force.
3. The collet for a mechanical testing machine according to claim 1, wherein: the connecting pin is trapezoidal, and the thickness that connecting pin and testing machine are connected one end is greater than the width that connecting pin and splint are connected one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122132358.8U CN215767971U (en) | 2021-09-03 | 2021-09-03 | Chuck for mechanical testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122132358.8U CN215767971U (en) | 2021-09-03 | 2021-09-03 | Chuck for mechanical testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215767971U true CN215767971U (en) | 2022-02-08 |
Family
ID=80084301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122132358.8U Active CN215767971U (en) | 2021-09-03 | 2021-09-03 | Chuck for mechanical testing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215767971U (en) |
-
2021
- 2021-09-03 CN CN202122132358.8U patent/CN215767971U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102721607B (en) | A deformation measuring device for a boss-free metal material high-temperature tensile test | |
| CN103674707A (en) | System and method for measuring direct tensile strength and deformation of rock | |
| CN209841544U (en) | Fatigue test buckling-restrained device for low-strength thin plate | |
| CN203241296U (en) | Tensile clamp device for longitudinal arc sheet tensile sample of high-strength pipe | |
| CN212964425U (en) | Bending, torsion and shearing combined type load testing machine | |
| CN108195679A (en) | A kind of device and test method for measuring wire rod tiny sample tensile strength | |
| CN205175817U (en) | Tensile compression anchor clamps that change of high low temperature of tensile test machine | |
| CN215767971U (en) | Chuck for mechanical testing machine | |
| CN204807394U (en) | Two -way rib line anchor clamps face reinforcing bar tensile test machine | |
| CN206177705U (en) | Modular tensile fixture of circular cross section sample | |
| CN217954097U (en) | Combined clamp for rock test | |
| CN107976362B (en) | Three-point bending fixture | |
| CN217211891U (en) | Winding type steel belt stretching accessory | |
| CN214066722U (en) | Vertical tensile test fixture for bonding force | |
| CN216718067U (en) | Anti-rotation self-centering bending test tool | |
| CN214749392U (en) | Fracture elongation detection device | |
| CN214408400U (en) | Convenient mechanical tensile sample measuring clamp | |
| CN112146975A (en) | Shear test fixture | |
| CN211347689U (en) | Extensometer clamping anti-skid device for measuring steel deformation | |
| CN216955455U (en) | Clamp for testing tensile strength of wood grain | |
| CN219142466U (en) | Small-size thick plate-shaped tensile sample clamp | |
| CN212539938U (en) | Clamp for small-size sheet tensile sample | |
| CN215262814U (en) | Tool for auxiliary measurement of elongation after breakage of heavy rail | |
| CN218297824U (en) | Small-size heavy H-shaped steel Z-direction tensile test auxiliary device | |
| CN209784140U (en) | Ozone aging testing sample clamping device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |