CN108732011A - Membrane material biaxial tensile strength tensile testing machine and its application method - Google Patents

Abstract

The invention provides a tensile testing machine for bidirectional tensile strength of membrane materials and its use method, which solves the technical problem of improving the bidirectional tensile strength of membrane materials, and includes a machine base, a PLC control system and a workbench. The machine base is equipped with The PLC control system is used to adjust the moving direction of the fixture and the tensile speed of the sample; there is a sliding guide roller at the front and rear of the workbench, and a sliding guide roller and a set of transmission rods on the left and right sides; the sliding guide The position of the roller is fixed to facilitate the movement of the sliding splint, and the transmission rod is convenient for the movement of the clamp. The transmission rod and the sliding guide roller are on the same plane and move on the front and rear sliding guide rollers; the position of the left and right sliding guide rollers is perpendicular to the front and rear sliding guide rollers, and the position is high Because of the front and rear sliding guide rollers, the distance between the left and right sliding guide rollers is much greater than the distance between the left and right transmission rods. The invention also has the advantages of meeting the requirements of testing membrane materials, simple operation, convenient use, and improving the accuracy and work efficiency of test results.

Description

Membrane material bidirectional tensile strength tensile testing machine and using method thereof

technical field

The invention relates to a tensile testing device and a testing method, in particular to a tensile testing machine capable of testing the bidirectional tensile strength of a membrane material and a testing method using the testing machine.

Background technique

At present, when using a tensile testing machine to test the tensile strength of a film material, usually only one direction is tested for tensile strength or the tensile strength parallel to and perpendicular to the direction of the film is tested separately, ignoring the influence of other directions on the strength of the direction of force. However, in actual application, the stress in all directions of the membrane material may occur simultaneously, so the current test results do not match the actual use, and the test method using the existing testing machine cannot meet the actual needs.

Contents of the invention

In order to solve the technical problem of the bidirectional force test of the membrane material, the invention provides a kind of membrane material bidirectional tensile strength tensile testing machine and its use method, the specific technical scheme is as follows:

A kind of membrane material bidirectional tensile strength tensile testing machine, comprises machine base, PLC control system, workbench and sample; Said PLC control system is arranged in the machine base, and operation area is on the side of machine base; Said workbench There are 4 sliding guide rollers, 2 sets of transmission rods, 4 clamps and sliding splints on the top. The 4 sliding guide rollers are the front sliding guide roller, the rear sliding guide roller, the left sliding guide roller and the right sliding guide roller. The rollers are fixed on the working platform and are parallel to the four sides of the working platform. The transmission rods are divided into left driving rods and right driving rods. Two sets of driving rods are arranged in parallel on the left and right sides of the working table; the sliding splint slides the guide roller along the left Slide with the right sliding guide roller; the clamp includes a front clamp, a rear clamp, a left clamp and a right clamp, wherein the front clamp is fixed on the front sliding guide roller, the rear clamp is fixed on the sliding splint, and the left clamp slides along the left transmission rod, The right clamp slides along the right transmission rod; the distance between the left transmission rod and the right transmission rod is less than the distance between the left sliding guide roller and the right sliding guide roller; the height of the left sliding guide roller and the right sliding guide roller is greater than that of the front sliding guide rollers and rear slide guide rollers.

Preferably, the sliding splint has a T-shaped structure, the rear clamp is fixed on the lower part of the sliding splint, and the four clamps are arranged in the same plane.

Preferably, the PLC control system controls the sliding direction and the sliding speed of the sliding splint, the fixture, the left transmission rod and the right transmission rod.

Preferably, the sample is in the shape of a cross as a whole, the width at the end of the sample is greater than the width at the middle, and the right angles of the sample are all arc angles.

Preferably, the clamp is provided with a tensile force gauge for measuring the magnitude of the tensile force.

Preferably, a laser leveling device is provided on the jig to ensure that the jig is stretched in the same plane.

The method for testing the bidirectional tensile strength tensile testing machine of membrane materials includes the following steps: Step 1, adjust the position of the fixture and the sliding splint, and level the fixture; Step 2, make a sample, and fix the sample on the On the fixture; Step 3, adjust the sliding direction and the sliding speed of the sliding splint and fixture through the PLC control system, and record the measured value of the tensile dynamometer; Step 4, observe the damage of the sample, record and analyze the test results.

The beneficial effects of the present invention include: through the sliding guide rollers, transmission rods, clamps and sliding splints arranged on the workbench, the sample is stretched along with the sliding splint, and the left and right clamps follow the sliding splint to move in the same direction and at the same speed. At the same time, the left and right clamps follow the movement of the left and right transmission rods, realizing the two-way application of tension, and the test conforms to the actual force of the membrane material; the distance between the left and right transmission rods is smaller than that of the left sliding guide roller and the right The distance between the sliding guide rollers ensures that the transmission rod has enough sliding space; the T-shaped design of the sliding splint ensures that the clamps can be in the same plane, so that the film material is evenly and stably stressed; laser leveling device and tension dynamometer The accuracy of the test result is guaranteed; in addition, the present invention also has the advantages of simple operation, convenient use, improved accuracy of the test result and work efficiency.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a membrane material bidirectional tensile strength tensile testing machine;

Fig. 2 is a schematic diagram of laser leveling structure;

Figure 3 is a schematic diagram of the sample structure;

In the figure: 1-machine base; 2-PLC control system; 3-worktable; 4-sample; 5-sliding guide roller; 6-transmission rod; 7-fixture; 8-sliding splint; 51-front sliding guide roller ;52-rear sliding guide roller; 53-left sliding guide roller; 54-right sliding guide roller; 61-left transmission rod; 62-right transmission rod; 71-front clamp; - right clamp; 75 - tension dynamometer; 76 - laser leveling device.

Detailed ways

Referring to Fig. 1 to Fig. 3, a kind of film material bidirectional tensile strength tensile testing machine provided by the present invention and the specific implementation method thereof are as follows.

As shown in Figure 1, the tensile testing machine for biaxial tensile strength of membrane materials specifically includes a machine base 1, a PLC control system 2, a workbench 3 and a sample 4. Above the workbench 3, there are 4 sliding guide rollers 5, 2 sets of transmission rods 6, 4 clamps 7 and sliding splints 8, among which the 4 sliding guide rollers 5 are respectively the front sliding guide roller 51 and the rear sliding guide roller 52 , the left sliding guide roller 53 and the right sliding guide roller 54, the sliding guide roller 5 is fixed on the workbench 3 and it is parallel to the four sides of the workbench 3; the transmission rod 6 is divided into a left transmission rod 61 and a right transmission rod 62, 2 groups The transmission rods 6 are arranged on the left and right sides of the workbench 3 in parallel. Wherein the PLC control system 2 is arranged in the machine base 1, the operating area is on the side of the machine base 1, and the PLC control system 3 is used to control the sliding direction and the sliding speed of the sliding splint 8, the fixture 7, the left transmission rod 61 and the right transmission rod 62 , and the sliding splint 8 slides back and forth along the left sliding guide roller 53 and the right sliding guide roller 54, the clamp 7 slides back and forth along the left transmission rod 61 and the right transmission rod 62, and the left transmission rod 61 and the right transmission rod 62 slide along the front guide roller 51 And rear sliding guide roller 52 slides left and right. Through the sliding guide roller 5, the transmission rod 6, the clamp 7 and the sliding splint 8 arranged on the workbench 3, the specimen is stretched along with the sliding splint, and the left clamp 73 and the right clamp 74 move in the same direction and at the same speed as the sliding clamp 8 At the same time, the left clamp 73 and the right clamp 74 follow the movement of the left transmission rod 61 and the right transmission rod 62, realizing the bidirectional application of tension, and the test conforms to the actual stress situation of the membrane material. In addition, the distance between the left transmission rod 61 and the right transmission rod 62 is less than the distance between the left sliding guide roller 53 and the right sliding guide roller 54, to ensure that the transmission rod has enough sliding space, the left sliding guide roller 53 and the right sliding guide roller The height of the roller 54 is greater than the front sliding guide roller 51 and the rear sliding guide roller 52, so as to ensure that the transmission rod 6 moves smoothly along the guide roller.

As shown in Figures 1 and 2, the clamps include a front clamp 71, a rear clamp 72, a left clamp 73 and a right clamp 74, wherein the front clamp 71 is fixed on the front sliding guide roller 51, and the rear clamp 72 is fixed on the sliding clamping plate 8, The left clamp 72 slides along the left transmission rod 61 , and the right clamp 72 slides along the right transmission rod 62 . The sliding splint 8 is in a T-shaped structure, the rear clamp 72 is fixed on the lower part of the sliding splint 8, and the four clamps 7 are arranged in the same plane. The sample fixed by the clamp 7 is in the shape of a cross as a whole. The width of the end of the sample 4 is larger than the width of the middle part, and the width of the end part is at least 3-5 cm larger than the width of the middle part. The right angle positions of the sample 4 are arc angles. A tensile force gauge 75 is arranged on the fixture for measuring the magnitude of the tensile force, and the force gauge records the change of the tensile force during the stretching process of the membrane material. The fixture is also provided with a laser leveling device 76, two laser instruments are arranged on the same straight line on the fixture, and two corresponding shading points are set on the same straight line on the fixture on the opposite side, and the fixture is adjusted by the laser leveling device. Leveling ensures that the clamps stretch the membrane material in the same plane, improving the accuracy of test results.

As shown in Figure 1 and Figure 3, when carrying out the biaxial tensile strength tensile test of film material, using method comprises the following steps: Step 1, adjust the position of clamp 7 and sliding splint 8, make it consistent with the size of sample 4, and Level the fixture 7; step 2, make the sample 4, and fix the sample 4 on the fixture 7, align it again to see if it is even, and observe the readings of the tensile dynamometer; step 3, adjust it through the PLC control system 2 The sliding direction and the sliding speed of the sliding splint 8 and the clamps 7 record the measured value of the tensile force meter 75, wherein the pulling force in the left and right direction is controlled by controlling the sliding speed of the left transmission rod 61 and the right transmission rod 62, and the control splint slides along the left side. The sliding speed of the roller 53 and the right sliding guide roller 54 adjusts the tension in the front and rear directions; Step 4, observe the damage of the sample, record and analyze the test results. The method realizes the testing of the bidirectional tensile strength of the membrane material by setting the bidirectional tensile speed, meets the actual needs, is simple to operate, is convenient to use, and improves the accuracy of test results and work efficiency.

Of course, the above descriptions are not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention shall also belong to the present invention. protection scope of the invention.

Claims (7)

1. A membrane material bidirectional tensile strength tensile testing machine, is characterized in that, comprises support, PLC control system, workbench and sample; Described PLC control system is arranged in the support, and operating area is in the side of support ; The top of the workbench is provided with 4 sliding guide rollers, 2 groups of transmission rods, 4 clamps and sliding splints, and the 4 sliding guide rollers are respectively front sliding guide rollers, rear sliding guide rollers, left sliding guide rollers and right sliding guide rollers. Sliding guide rollers, the sliding guide rollers are fixed on the working platform and parallel to the four sides of the working platform, the transmission rods are divided into left transmission rods and right transmission rods, and two sets of transmission rods are arranged in parallel on the left and right sides of the workbench; the sliding The splint slides along the left sliding guide roller and the right sliding guide roller; the clamps include a front clamp, a rear clamp, a left clamp and a right clamp, wherein the front clamp is fixed on the front sliding guide roller, the rear clamp is fixed on the sliding splint, and the left clamp Slide along the left transmission rod, and the right clamp slides along the right transmission rod; the distance between the left transmission rod and the right transmission rod is less than the distance between the left sliding guide roller and the right sliding guide roller; the left sliding guide roller and the right sliding guide The roller height is greater than the front sliding guide roller and the rear sliding guide roller. 2. a kind of film material biaxial tensile strength tensile testing machine according to claim 1, is characterized in that, described sliding splint is T-shaped structure, and back clamp is fixed on the bottom of sliding splint, and described 4 clamps are arranged on in the same plane. 3. a kind of film material bidirectional tensile strength tensile testing machine according to claim 1, is characterized in that, described PLC control system controls the sliding direction and the sliding speed of sliding splint, clamps, left transmission rod and right transmission rod. 4. A kind of film material bidirectional tensile strength tensile testing machine according to claim 1, is characterized in that, described sample is overall cross-shaped, and sample end width is greater than middle part width, and sample right angle position is circle arc angle. 5. A kind of film material biaxial tensile strength tensile testing machine according to claim 1, is characterized in that, described fixture is provided with tension gauge, is used for measuring the magnitude of tensile force. 6. A kind of membrane material biaxial tensile strength tensile testing machine according to claim 1, is characterized in that, said clamp is provided with laser leveling device, has guaranteed that clamp is stretched in the same plane. 7. A method for using a film material biaxial tensile strength tensile testing machine according to any one of claims 1 to 6, characterized in that it comprises the following steps: step 1, adjusting the position of the clamp and the sliding splint, and adjusting the position of the clamp Carry out leveling; step 2, make the sample, and fix the sample on the fixture; step 3, adjust the sliding direction and sliding speed of the sliding splint and the fixture through the PLC control system, and record the measured value of the tensile force meter; step 4 , observe the destruction of the sample, record and analyze the test results.