CN113029769A

CN113029769A - Stretching experiment clamp capable of adjusting angle and being flexibly installed

Info

Publication number: CN113029769A
Application number: CN202110257877.9A
Authority: CN
Inventors: 张越; 朱琳伟; 彭锐涛; 徐洪贺; 卢岩; 王涛
Original assignee: Xiangtan University
Current assignee: Xiangtan University
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-06-25
Anticipated expiration: 2041-03-10
Also published as: CN113029769B

Abstract

The invention provides a stretching experiment clamp with adjustable angle and flexible installation, which relates to a stretching experiment machine clamp and mainly comprises an upper clamp module, an angle adjusting module and a lower clamp module; the angle adjustment disc of the angle adjustment module is in threaded connection with the center rod of the upper clamp, the spring is in threaded connection with the center rod of the upper clamp, the upper gasket is in threaded connection with the center rod of the upper clamp, the rotated angle of the clamping plate of the upper clamp can be accurately read from the angle adjustment disc, and the time required by angle adjustment is greatly shortened. The clamping plate is provided with a vertically meshed slotting design, so that the friction force of the clamping plate on the plate is increased, and the plate can be effectively prevented from sliding; meanwhile, the clamping plate is provided with an arc-shaped groove, so that the clamp can conveniently and flexibly mount a test piece, and is safe and efficient; the invention can meet the requirements of multi-angle plate stretching experiments and has large clamping force.

Description

Stretching experiment clamp capable of adjusting angle and being flexibly installed

Technical Field

The invention provides a stretching experiment clamp capable of adjusting an angle and being flexibly installed, and relates to the field of stretching experiment machine clamps.

Background

The tensile test is an experimental method for measuring the material characteristics under the axial tensile load, and is one of basic methods for testing the mechanical properties of the material. The data obtained by the tensile test can be used for determining the elastic limit, the elongation, the elastic modulus, the proportion limit, the area reduction, the tensile strength, the yield point, the yield strength and other tensile property indexes of the material. Creep data can be obtained from tensile experiments conducted at elevated temperatures. The procedure for the metal tensile test can be found in ASTM E-8. The methods for plastic tensile testing are described in ASTM D-638 Standard, D-2289 Standard (high Strain Rate) and D-882 Standard (thin sheet). The ASTM D-2343 standard specifies tensile test methods suitable for glass fibers; tensile test methods for hard rubbers are specified in the ASTM D-412 standard. Patent CN107621405A discloses a multifunctional mechanical tensile test fixture, which can realize the mechanical tensile test of sheet, cylinder, square column and triangular prism samples on one fixture; the clamp can solve the problem that the sample is short and difficult to effectively and stably clamp the sample to cause the shedding phenomenon, and also can solve the problem of the safety of an experimental piece in the stretching process. However, the clamp is long in time consumption and low in efficiency when used for clamping a test piece, and stretching of different clamping angles of the upper test piece and the lower test piece cannot be achieved. Patent CN104614234A discloses a film material tensile test fixture, which can obviously shorten the clamping time and improve the test efficiency, but the test piece angle cannot be adjusted. In summary, a stretching experiment clamp which is used for a sheet material with an included angle between an upper plate and a lower plate and is adjustable in angle and flexible in installation needs to be designed.

Disclosure of Invention

In order to solve the problems, the invention provides a stretching experiment clamp with adjustable angle and flexible installation, which mainly meets the requirement of a test piece with an angle on a stretching experiment, and rotates an upper clamp clamping plate according to the angle between an upper plate test piece and a lower plate test piece, so that the whole test piece is uniformly loaded and does not slide during the stretching experiment, and the multi-angle plate stretching experiment can be realized; the test piece is replaced only by screwing out the clamping plate, and the clamp does not need to be completely disassembled. The angle adjusting module is simple in structure and novel in design, can accurately adjust the rotating angle of the clamp, reduces the production cost and has certain market potential;

in order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a clamp with adjustable angle and flexible installation comprises an upper clamp module, an angle adjusting module and a lower clamp module; the upper clamp module comprises an upper clamp center rod, an upper clamp clamping plate, a washer, a fixing nut, a cap-shaped nut, a bolt and a nut, and the lower clamp module comprises a lower clamp center rod, a lower clamp clamping plate, a washer, a fixing nut, a cap-shaped nut, a bolt and a nut. The angle adjusting module comprises an upper gasket, a spring and an angle adjusting disc. The center rods of the upper clamp module and the lower clamp module are in threaded connection with the clamping plate, the clamping plate is provided with a screw hole for connecting a fixing nut with the clamping plate, the fixing nut directly acts on the plate to fix the plate, and all the fixing nuts are arranged on the upper end surface to facilitate the installation of the plate; the angle adjusting disc of the angle adjusting module is in threaded connection with a center rod of the upper fixture, the spring is in threaded connection with the center rod of the upper fixture, the upper gasket is in threaded connection with the center rod of the upper fixture, the angle adjusting module is connected with the upper fixture module through being in threaded connection with the center rod of the upper fixture, and the rotating angle of the clamping plate of the upper fixture is recorded after the cap-shaped nut is unscrewed.

The angle adjustment module utilizes the characteristic of spring to remove the connection of last anchor clamps grip block and angle adjustment disc of last anchor clamps module, goes up the anchor clamps grip block and can rotate around last anchor clamps well core rod, and the angle adjustment module does not rotate, can accurately read the angle that goes up the anchor clamps grip block pivoted from the angle adjustment disc, has shortened the required time of angle adjustment by a wide margin.

The clamping plates of the upper clamp module and the lower clamp module are provided with grooves which are meshed up and down, so that the friction force of the clamping plates on the plate is increased, and the plate can be effectively prevented from sliding; meanwhile, the clamping plate is provided with an arc-shaped groove, so that the clamp can mount a test piece conveniently and flexibly, safely and efficiently.

The clamping plates of the upper clamp module and the lower clamp module are designed with reinforcing ribs for reinforcing, the clamping plate of the upper clamp module is designed with a pointer, and the pointer on the clamping plate of the upper clamp module points to the angle adjusting disc.

The upper clamp clamping plate of the upper clamp module and the lower clamp clamping plate of the lower clamp module are identical in upper and lower structure, and the clamping plates, the washers, the fixing nuts, the cap nuts, the bolts and the nuts of the upper clamp module and the lower clamp module are identical in upper and lower structure.

Advantageous effects

The invention provides a stretching experiment clamp with adjustable angle and flexible installation, which mainly meets the requirement of a test piece with an angle for a stretching experiment, and rotates an upper clamp clamping plate according to the angle between an upper plate test piece and a lower plate test piece, so that the whole test piece is uniformly loaded and does not slip during the stretching experiment, and the multi-angle plate stretching experiment can be realized; the test piece is replaced only by screwing out the clamping plate, and the clamp does not need to be completely disassembled. The angle adjusting module is simple in structure and novel in design, can accurately adjust the rotating angle of the clamp, reduces production cost, and has certain market potential.

Compared with the prior art:

the multi-angle plate tensile test device can meet the requirements of multi-angle plate tensile tests, has large clamping force, can effectively prevent plates from sliding, and has high safety, convenient and flexible loading and unloading of test pieces, safety and high efficiency.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and the following detailed description.

FIG. 1 is a front view of an adjustable angle flexible mounting tensile test fixture of the present invention.

FIG. 2 is an isometric view of an adjustable angle flexible mounting tensile test fixture of the present invention.

Fig. 3 is a block diagram of an upper jig module of the present invention.

Fig. 4 is a structural view of an angle adjustment module of the present invention.

Fig. 5 is a view showing the construction of a lower jig module of the present invention.

FIG. 6 is a view of the center bar of the lower clamp of the present invention.

Fig. 7 is a structural view of an upper jig clamping plate of the present invention.

Fig. 8 is a view showing the structure of a clamping plate of the present invention.

Fig. 9 is a top clamp center bar configuration of the present invention.

Fig. 10 is a structural view of an angle adjustment disk of the present invention.

Fig. 11 is a view showing the structure of an upper gasket of the present invention.

The reference numbers in the figures illustrate: i-upper clamp module, ii-angle adjustment module, iii-lower clamp module, 1-lower clamp center rod, 2-cap nut, 3-washer, 4-upper clamp clamping plate, 5-nut, 6-bolt, 7-clamping plate, 8-fixing nut, 9-lower clamp clamping plate, 10-angle adjustment disc, 11-spring, 12-upper washer, 13-upper clamp center rod.

Detailed Description

The embodiment is a tensile experiment clamp with adjustable angle and flexible installation.

The embodiment of the tensile test fixture for flexible installation with adjustable angle shown in fig. 1-11 is composed of an upper fixture module i, an angle adjusting module ii and a lower fixture module iii. Wherein, go up anchor clamps module I and contain well core rod 13 of last anchor clamps, go up anchor clamps grip block 9, pinch-off blades 7, packing ring 3, fixation nut 8, cap nut 2, bolt 5, nut 6, lower anchor clamps module contains well core rod 1 of lower anchor clamps, lower anchor clamps grip block 4, pinch-off blades 7, packing ring 3, fixation nut 8, cap nut 2, bolt 5, nut 6. The angle adjusting module II comprises an upper gasket 12, a spring 11 and an angle adjusting disc 10. An upper clamp center rod 13 is in threaded connection with an upper clamp clamping plate 9 and a lower clamp center rod 1 is in threaded connection with a lower clamp clamping plate 4, the upper clamp clamping plate 9 and the lower clamp clamping plate 4 are in threaded connection with a clamping plate 7, the upper clamp clamping plate 9 and the lower clamp clamping plate 4 are provided with screw holes for connecting a fixing nut 8 with the upper clamp clamping plate 9 and the lower clamp clamping plate 4, the fixing nut 8 directly acts on a plate to fix the plate, and all the fixing nuts 8 are arranged on the upper end face to facilitate the installation of the plate; the angle adjustment disc of angle adjustment module II and 13 threaded connection in the last anchor clamps,

spring

11 and 13 threaded connection in the last anchor clamps, go up

packing ring

12 and 13 threaded connection in the last anchor clamps, angle adjustment module II is connected with last anchor clamps module I through 13 threaded connection in with last anchor clamps, takes notes anchor clamps grip block 9 pivoted angle after unscrewing cap nut 2, realizes the tensile experiment of multi-angle panel.

In this embodiment, the angle adjustment module ii utilizes the characteristic of spring 12 to remove the connection of last anchor clamps grip block 9 and angle adjustment disc 10 of going up anchor clamps module i, goes up anchor clamps grip block 9 and can rotate around last anchor clamps well core rod 13, and angle adjustment module ii does not rotate, can accurately read the angle that goes up anchor clamps grip block 9 pivoted from angle adjustment disc 10, has shortened the required time of angle adjustment by a wide margin.

In the embodiment, the clamping plates 7 of the upper clamp module I and the lower clamp module III are designed to be vertically meshed with each other, so that the friction force of the clamping plates 7 on the plate is increased, and the plate can be effectively prevented from sliding; meanwhile, the clamping plate 7 is provided with an arc-shaped groove, so that the clamp can conveniently and flexibly mount a test piece, and is safe and efficient.

In this embodiment, the upper clamp holding plate 9 and the lower clamp holding plate 4 of the upper clamp module i and the lower clamp module iii are designed as reinforcing ribs to reinforce, the upper clamp holding plate 9 and the lower clamp holding plate 4 are designed as pointers, and the pointers on the upper clamp holding plate 9 point to the angle adjusting disk 10.

When this embodiment uses, unscrew the lid shape nut 2 of going up anchor clamps module I lightly, then rotate and go up anchor clamps grip block 9, read rotatory angle through the pointer on the last anchor clamps grip block 9 for the contained angle of upper and lower grip block is unanimous with the contained angle between the upper and lower panel, screws up the lid shape nut 2 of going up anchor clamps module I, puts into panel. Through 8 screw holes of upper clamp grip block 9, lower clamp grip block 4 and 8 screw hole threaded connection of pinch-off blades 7 to and screw up 4 fixation nut 8, fixed panel. And clamping the tail ends of the upper clamp center rod 13 and the lower clamp center rod 1 by using an upper clamp head and a lower clamp head of a universal mechanical testing machine, and performing a tensile test. After the experiment once, unscrew fixation nut 8, unscrew nut 6 on the circular arc groove, pinch-off blades 7 revolves out along the circular arc groove, after changing the test piece, will pinch-off blades 7 screw in, screws up nut 6 and fixation nut 8, begins the experiment next time.

The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.

Claims

1. The utility model provides a nimble tensile experiment anchor clamps of adjustable angle installation which characterized in that: the device comprises an upper clamp module, an angle adjusting module and a lower clamp module; the upper clamp module comprises an upper clamp center rod, an upper clamp clamping plate, a washer, a fixing nut, a cap-shaped nut, a bolt and a nut, and the lower clamp module comprises a lower clamp center rod, a lower clamp clamping plate, a washer, a fixing nut, a cap-shaped nut, a bolt and a nut. The angle adjusting module comprises an upper gasket, a spring and an angle adjusting disc. The center rods of the upper clamp module and the lower clamp module are in threaded connection with the clamping plate, the clamping plate is provided with a screw hole for connecting a fixing nut with the clamping plate, the fixing nut directly acts on the plate to fix the plate, and all the fixing nuts are arranged on the upper end surface to facilitate the installation of the plate; an angle adjusting disc of the angle adjusting module is in threaded connection with a central rod of the upper clamp, a spring is in threaded connection with the central rod of the upper clamp, an upper gasket is in threaded connection with the central rod of the upper clamp, the angle adjusting module is connected with the upper clamp module through being in threaded connection with the central rod of the upper clamp, and the rotating angle of a clamping plate of the upper clamp is recorded after a cap-shaped nut is unscrewed;

the angle adjusting module releases the connection between an upper clamp clamping plate of the upper clamp module and the angle adjusting disc by utilizing the characteristics of the spring, the upper clamp clamping plate can rotate around the upper clamp center rod, the angle adjusting module does not rotate, the rotating angle of the upper clamp clamping plate can be accurately read from the angle adjusting disc, and the time required by angle adjustment is greatly shortened;

the clamping plates of the upper clamp module and the lower clamp module are provided with grooves which are meshed up and down, so that the friction force of the clamping plates on the plate is increased, and the plate can be effectively prevented from sliding; meanwhile, the clamping plate is provided with an arc-shaped groove, so that the clamp can conveniently and flexibly mount a test piece, and is safe and efficient;

2. The tensile experiment clamp capable of adjusting the angle and being flexibly installed is characterized in that an upper clamp clamping plate of an upper clamp module is the same as a lower clamp clamping plate of a lower clamp module in vertical structure, and clamping plates, gaskets, fixing nuts, cap-shaped nuts, bolts and nuts of the upper clamp module and the lower clamp module are the same in vertical structure.