CN203350132U - Tensile dynamometer for adhesive specimen tests - Google Patents

Abstract

The utility model discloses a tensile dynamometer for adhesive sample testing, which comprises a bracket, a transmission device installed on the bracket, a force measuring device and a test sample; The screw nut, the movable trolley with the test hole set on the horizontal partition and the steel ball installed on the movable trolley; one end of the screw is installed on the peripheral bracket, and the other end of the screw is installed on the horizontal partition through a bearing One end of the test sample is fixed on the screw nut, and the other end of the test sample is fixed on the movable trolley; the force measuring device includes a force measuring rod and four resistance strain gauges installed on the force measuring rod; the bottom end of the force measuring rod Fixed on the peripheral bracket, the top of the force measuring rod protrudes from the test hole and contacts the steel ball, and the resistance strain gauge is connected with the peripheral computer through the signal line. The data measured by the utility model is convenient for subsequent computer collection and processing, and has high measurement precision, convenient operation and low manufacturing cost.

Description

A Tensile Force Tester for Testing Adhesive Samples

technical field

The utility model relates to a stretching dynamometer, in particular to a stretching dynamometer for testing adhesive samples.

Background technique

Compared with ordinary metal tensile samples, adhesive tensile samples have the performance characteristics of small stress and large strain, but there is no special tensile tester to complete the stress-strain performance test of adhesive samples.

The design of the dynamometer and the selection of parts materials should follow the following principles:

(1) The design of the dynamometer must meet the functional requirements and accuracy requirements proposed by the entrusting party, and meet the provisions of the national standard "Measurement Method for Tensile Shear Strength of Adhesives".

(2) Since the dynamometer may work under high temperature and humidity conditions for a long time, it should be made of materials with strong corrosion resistance as much as possible to avoid rust and corrosion affecting the measurement accuracy.

(3) Measurement data should be convenient for subsequent computer collection and processing.

(4) The operation and use of the dynamometer should be convenient and quick, and the manufacturing cost should be low.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of this utility model is to provide a tensile dynamometer for adhesive sample testing, the measured data is convenient for subsequent computer collection and processing, and the measurement accuracy is high, easy to operate, and easy to manufacture. low cost.

In order to achieve the above object, the utility model is realized through the following technical solutions:

The utility model includes a bracket, a transmission device installed on the bracket, a force measuring device and a test sample; the bracket includes a peripheral bracket and a horizontal partition installed inside the peripheral bracket; the transmission device includes a screw rod, a wire rod installed on the screw rod Rod nut, a movable trolley with a test hole set on the horizontal partition and a steel ball installed on the movable trolley; one end of the screw is installed on the peripheral bracket, and the other end of the screw is installed on the horizontal partition through a bearing. One end of the test sample is fixed on the screw nut, and the other end of the test sample is fixed on the movable trolley; the force measuring device includes a force measuring rod and four resistance strain gauges installed on the force measuring rod; the bottom end of the force measuring rod is fixed on On the peripheral support, the top end of the force measuring rod protrudes from the test hole and contacts the steel ball, and the resistance strain gauge is connected with the peripheral computer through the signal line.

The above-mentioned resistance strain gauges are installed at the root of the force measuring rod.

Corrosion-resistant materials are selected for the above-mentioned screw rods and force measuring rods.

The data measured by the utility model is convenient for subsequent computer collection and processing, and the measurement accuracy is high, the operation is convenient, and the manufacturing cost is low; since the screw rod and the force measuring rod are all made of materials with strong corrosion resistance, thus avoiding rust Corrosion affects the accuracy of measurements.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Each label in the figure: 1. screw rod, 2. screw nut, 3. test sample, 4. horizontal partition, 5. steel ball, 6. movable trolley, 7. force measuring rod, 8. resistance strain gauge, 9. Peripheral support, 10. Signal line. the

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

Referring to Fig. 1, the utility model comprises a support, a transmission device installed on the support, a force measuring device and a test sample 3.

Wherein, the bracket includes a peripheral bracket 9 and a horizontal partition 4 installed inside the peripheral bracket 9 .

Wherein, the transmission device includes a screw rod 1 , a screw nut 2 installed on the screw rod 1 , a movable trolley 6 with a test hole on the right side of the horizontal partition 4 and a steel ball 5 installed on the movable trolley 6 .

The left end of the screw rod 1 is installed on the peripheral support 9, the right end of the screw rod 1 is installed on the fixed frame (not marked in the figure) in the middle of the horizontal partition 4 through the bearing (not marked in the figure), and the left end of the test sample 3 is fixed On the screw nut 2, the right end of the test sample 3 is fixed on the movable trolley 6.

Wherein, the force measuring device includes a force measuring rod 7 and four resistance strain gauges 8 , the resistance strain gauges 8 are installed on both sides of the root of the force measuring rod 7 , and the resistance strain gauges 8 are connected with peripheral computers through signal lines 10 . The strain signal output by the signal line 10 is amplified and then input to a peripheral computer for processing.

The bottom end of the force measuring rod 7 is fixed on the bottom end of the peripheral bracket 9, the top of the force measuring rod 7 protrudes from the test hole, and the right side of the force measuring rod 7 contacts the steel ball 5 on the movable trolley 6 to form a cantilever The force form of the beam (in the case of the same force, the force form of the cantilever can obtain a large elastic deformation at the root of the force measuring rod 7), and four resistance strain gauges 8 form a Wheatstone full-bridge circuit for measuring The amount of elastic deformation of the force bar 7.

Considering that the temperature and humidity of the working environment of the screw rod 1 are high, in order to prevent corrosion from affecting the test accuracy of the utility model, the material of the screw rod 1 is ferritic stainless steel with strong oxidation resistance and corrosion resistance.

The working environment of the force measuring rod 7 is the same as that of the screw rod 1, and it may also work under high temperature and humidity conditions for a long time, and a material with strong corrosion resistance should also be selected.

The working principle of the utility model is as follows:

By adjusting the screw mandrel 1, the screw mandrel 1 is rotated, and the screw nut 2 on the screw mandrel 1 is driven to move horizontally to the left (that is, the rotational motion is converted into a linear motion), and the test sample 3 is subjected to horizontal tensile loading; thus , the force on the test sample 3 is transmitted to the force measuring rod 7 through the movable trolley 6.

The movable trolley 6 can move flexibly on the horizontal partition 4. Since the friction coefficient of the trolley is very small, it can be considered that the tensile force on the test sample 3 will be completely transmitted to the force measuring rod 7, both of which have the same size and the resistance The strain gauge 8 is connected to the peripheral computer through the signal line 10, and the strain signal output by the signal line 10 is amplified and then input to the peripheral computer for processing.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (3)

1. the tension load cell for the tackifier sample testing, is characterized in that, comprises support and rack-mount gearing, device for measuring force and test sample (3);

Described support comprises peripheral frame (9) and is arranged on the inner horizontal baffle (4) of peripheral frame (9);

Described gearing comprises screw mandrel (1), be arranged on feed screw nut (2) on screw mandrel (1), to be arranged on horizontal baffle (4) upper and with the billy gate (6) of instrument connection be arranged on the steel ball (5) on billy gate (6);

Described screw mandrel (1) one end is arranged on peripheral frame (9), the other end of screw mandrel (1) is arranged on horizontal baffle (4) by bearing, it is upper that described test sample (3) one ends are fixed on feed screw nut (2), and test sample (3) other end is fixed on billy gate (6);

Described device for measuring force comprises dynamometer link (7) and is arranged on four sheet resistance foil gauges (8) on dynamometer link (7);

It is upper that described dynamometer link (7) bottom is fixed on peripheral frame (9), and dynamometer link (7) top is stretched out and contacted with steel ball (5) from instrument connection, and described resistance strain gage (8) is connected with peripheral computing machine by signal wire (10).

2. the tension load cell for the tackifier sample testing according to claim 1, is characterized in that,

Described resistance strain gage (8) is arranged on the root of dynamometer link (7).

3. the tension load cell for the tackifier sample testing according to claim 1 and 2, is characterized in that,

Described screw mandrel (1) and dynamometer link (7) are all selected corrosion resistant material.

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