Fixture for stretching fiberglass mesh

Abstract

The utility model discloses a fixture for stretching glass fiber gridding cloth, which comprises two symmetrically arranged fixture single bodies, each fixture single body comprises a fixture main plate and a clamp assembly, and a joint connected with a testing machine is mounted on the side surface, far away from the center, of each fixture main plate; the clamp assembly is installed on the front side face of the clamp main plate. The clamp assembly comprises a fixing plate arranged on the upper portion and a fixing clamp arranged on the lower portion, and the fixing plate and the fixing clamp are both fixed to the front side face of the clamp main plate. The screw rod penetrates through the fixed plate from top to bottom and then is connected with the top of the movable clamp; the fixed plate is provided with an internal thread screwed with the screw rod; wave grooves extending in the stretching direction are formed in the attaching faces of the fixed clamp and the movable clamp respectively, and wave crests and wave troughs of the upper and lower wave grooves are staggered and clamped; the clamp is provided with a pair of wave grooves which are meshed with each other, stronger clamping force is achieved under the action of the same pre-tightening force, and a clamped strip is not prone to slipping off.

Description

Technical Field

[0001] The utility model relates to a clamp for stretching a glass fiber mesh cloth. Background Art

[0002] Glass fiber is woven by special technology. It is an innovative elastic glass fiber with main properties such as heat resistance, corrosion resistance and high strength. It can be used in insulation materials such as motors, instruments, electrical appliances and cables. Glass fiber mesh is woven from glass fiber. The mechanical properties of glass fiber mesh required in different fields are also very different. In order to understand and master the mechanical properties of glass fiber mesh, we usually use universal testing machine to test it.

[0003] The principle of the tensile test is that the main motor of the testing machine drives the movable scale to move upward and downward through the reduction device and the screw rod, so that the test piece produces tensile or compressive deformation. The pressure sensor installed inside the testing machine transmits the test force (load) to the main machine, and the strain force and displacement are displayed on the LCD display.

[0004] Since there is no special tooling available at present, the fiberglass rope can only be tied to the end of an ordinary pulling tooling for testing after being fixed. This makes it easy for the rope to break at the contact point or contact surface between the ordinary tooling and the rope, resulting in abnormal test data and the inability to accurately grasp the mechanical properties of the fiberglass rope material.

[0005] In order to solve this shortcoming, the invention patent application with application number: 2020105529040 discloses a special clamp. It can be seen from the accompanying drawings that the jaws of this structure are flat. When the mesh cloth is stretched, it is locked by the clamping force of the clamp. However, this flat clamp has the problem of low clamping force. The smooth surface of the flat clamp cannot clamp the mesh cloth well, and it is easy to be pulled out from the jaws. In order to increase the clamping force, the clamping rod must be tightened, which causes the mesh cloth to be crushed and broken, affecting the tensile test. Utility Model Content

[0006] The utility model aims to provide a clamp for stretching a glass fiber mesh cloth to solve the above-mentioned problem.

[0007] The technical solution adopted by the utility model is: a glass fiber mesh cloth stretching fixture, comprising two symmetrically arranged fixture monomers, the fixture monomers comprising a fixture main board and a clamp assembly, and a connector connected to a testing machine is installed on the side of the fixture main board away from the center;

[0008] The clamp assembly is mounted on the front side of the clamp main board;

[0009] The clamp assembly comprises a fixing plate disposed on the upper side and a fixing clamp disposed on the lower side, wherein the fixing plate and the fixing clamp are both fixed on the front side of the clamp main board;

[0010] The screw rod penetrates the fixed plate from top to bottom and is connected to the top of the movable clamp. The fixed plate is provided with an internal thread that is screwed with the screw rod.

[0011] The fitting surfaces of the fixed jaw and the movable jaw are each provided with a wave groove extending along the stretching direction, and the wave crests and wave troughs of the upper and lower wave grooves are staggered and engaged with each other;

[0012] A handle bar penetrates transversely through the top of the screw rod.

[0013] Optionally, the fixing plate is provided with a guide pin on each side of the screw rod, the upper end of the guide pin is fixed in the fixing plate, and the lower end of the guide pin extends into a guide hole pre-set in the movable pliers.

[0014] Optionally, a winding wheel is provided on one side of the clamp assembly close to the joint, and one end of the strip first passes through the clamp assembly and then winds back into the clamp assembly, which has a stronger gripping force.

[0015] Optionally, the outer edge of the winding wheel is provided with a circle of flange for blocking the strip.

[0016] Optionally, the clamp main board includes a joint mounting portion for supporting the joint and a clamp assembly supporting portion for mounting the clamp assembly and the winding wheel.

[0017] Beneficial effects:

[0018] The clamp has a stronger clamping force under the same preload force, the clamped strip is not easy to slip off, and it also has the advantage of not being easy to damage the strip after clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 and Figure 2 It is a structural schematic diagram of the utility model;

[0020] Figure 3 This is a diagram of the use state of the utility model;

[0021] in:

[0022] 1- Fixture main board;

[0023] 2-Clamp assembly;

[0024] 3-Wrap around the wheel;

[0025] 4- connector;

[0026] 1a-joint mounting portion, 1b-clamp assembly supporting portion;

[0027] 2-1-fixed plate, 2-2-movable clamp, 2-3-fixed clamp, 2-4-screw, 2-5-handle rod, 2-6-guide pin;

[0028] 2-2a, 2-3-wave groove;

[0029] 3a-Flange. DETAILED DESCRIPTION

[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0031] See also Figure 1 to Figure 2 And refer to Figure 3 A glass fiber mesh cloth stretching fixture, comprising two symmetrically arranged fixture monomers, the fixture monomers comprising a fixture main board 1 and a clamp assembly 2, and a connector 4 connected to a testing machine is installed on the side of the fixture main board 1 away from the center;

[0032] The clamp assembly 2 is mounted on the front side of the clamp main board 1 (see Figure 1 and Figure 2 );

[0033] The clamp assembly 2 includes a fixing plate 2-1 disposed on the top and a fixing clamp 2-3 disposed on the bottom, and the fixing plate 2-1 and the fixing clamp 2-3 are both fixed on the front side of the clamp main board 1;

[0034] The screw rod 2-4 penetrates the fixed plate 2-1 from top to bottom and is connected to the top of the movable clamp 2-2. The fixed plate 2-1 is provided with an internal thread that is screwed with the screw rod 2-4.

[0035] The fitting surfaces of the fixed jaw 2-3 and the movable jaw 2-2 are respectively provided with wave grooves 2-2a and 2-3a extending in the stretching direction, and the wave crests and troughs of the wave grooves 2-3a of the fixed jaw 2-3 and the wave grooves 2-2a of the movable jaw 2-2 are staggered and can be engaged with each other, and the strip is pressed in the wave grooves 2-2a and 2-3a, and a greater clamping force is obtained under the same preload force;

[0036] The handle bar 2-5 penetrates the top of the screw rod 2-4 laterally.

[0037] Optionally, the fixed plate 2-1 is provided with a guide pin 2-6 on both sides of the screw rod 2-4, the upper end of the guide pin 2-6 is fixed in the fixed plate 2-1, and the lower end of the guide pin 2-6 extends into the guide hole pre-set in the movable clamp 2-2.

[0038] In order to further improve the clamping force, a winding wheel 3 is provided on the side of the clamp assembly 2 close to the joint 4. One end of the strip first passes through the clamp assembly 2 and then winds back into the clamp assembly 2, which has a stronger gripping force (refer to Figure 3 ).

[0039] In order to prevent the strip from slipping, a flange 3a is provided on the outer edge of the winding wheel 3 to stop the strip.

[0040] The clamp main board 1 includes a joint mounting portion 1a for supporting the joint 4 and a clamp assembly supporting portion 1b for mounting the clamp assembly 2 and the winding wheel 3. As can be seen from the figure, the clamp assembly supporting portion 1b is a plate-shaped body and the joint mounting portion 1a is a cone-shaped body.

[0041] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A glass fiber mesh stretching fixture, characterized in that: The clamp comprises two symmetrically arranged clamp monomers, each of which comprises a clamp main plate and a clamp assembly, and a connector connected to a testing machine is installed on a side of the clamp main plate away from the center; The clamp assembly is mounted on the front side of the clamp main board; The clamp assembly comprises a fixing plate disposed on the upper side and a fixing clamp disposed on the lower side, wherein the fixing plate and the fixing clamp are both fixed on the front side of the clamp main board; The screw rod penetrates the fixed plate from top to bottom and is connected to the top of the movable clamp. The fixed plate is provided with an internal thread that is screwed with the screw rod. The fitting surfaces of the fixed jaw and the movable jaw are each provided with a wave groove extending along the stretching direction, and the wave crests and wave troughs of the upper and lower wave grooves are staggered and engaged with each other; A handle bar penetrates transversely through the top of the screw rod.

2. A glass fiber mesh stretching fixture as claimed in claim 1, characterized in that: The fixing plate is provided with a guide pin on each side of the screw rod, the upper end of the guide pin is fixed in the fixing plate, and the lower end of the guide pin extends into a guide hole pre-set in the movable clamp.

3. A glass fiber mesh stretching fixture as claimed in claim 1, characterized in that A winding wheel is also provided on one side of the clamp assembly close to the joint, and one end of the strip first passes through the clamp assembly and then winds back into the clamp assembly, which has a stronger gripping force.

4. A glass fiber mesh stretching fixture as claimed in claim 3, characterized in that: The outer edge of the winding wheel is provided with a circle of flange for blocking the strip.

5. A glass fiber mesh stretching fixture as claimed in claim 4, characterized in that: The clamp main board includes a joint mounting portion for supporting a joint and a clamp assembly supporting portion for mounting the clamp assembly and the winding wheel.

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