CN203443826U - Fast surface processing device of composite material test samples - Google Patents

Abstract

The utility model proposes a rapid processing device for the surface of a composite material test sample, including a bottom plate, a stopper, a pressure plate, a flange, a push rod, a sidewall and a bracket. Installed at one end of the bottom plate, the bracket is fixedly installed on the block, the ejector rod passes through the bracket and is threadedly connected with the bracket, the upper end of the ejector rod is fixed with the flange, the lower end of the ejector rod is fixedly connected with the pressure plate, and the composite material test sample is placed on the bottom plate , The bottom plate, the stopper, the pressure plate and the rib jointly fix the composite material test sample, and limit the movement of the composite material test sample in the three directions of X, Y, and Z. The utility model can realize batch grinding of test samples of composite materials, and improve the processing efficiency by more than 95%. Discrete coefficients improve the reliability of test results.

Description

A rapid processing device for the surface of a composite material test sample

technical field

The utility model relates to a rapid processing device for the surface of a composite material test sample, which belongs to the technical field of composite material mechanical performance testing.

Background technique

Composite material structures are generally designed with allowable strain. When designing, it should be noted that composite materials are quite different from metal materials in terms of performance, failure mode, durability, damage tolerance, manufacturing process, and quality control. There is sufficient strength and stiffness under load, and the safety margin should be greater than zero under design load.

Therefore, the composite materials selected for design must be tested for mechanical properties before use, and performance tests for the mechanical strength of various materials such as tension, compression, bending, and shearing at high temperature or normal temperature are carried out. According to the requirements of mechanical testing standards, test specimens of standard size must be prepared for use by testing instruments.

The manufacturing quality of composite mechanical test specimens will greatly affect the mechanical test results of the specimens. Before the mechanical test of the cut sample, the bonding parts of the reinforcement sheets at both ends should be polished and the reinforcement sheets should be bonded at both ends. Grinding degree and consistency are important factors affecting the accuracy of mechanical test results of samples, and poor control will lead to large dispersion of mechanical test results of composite materials. There are following problems in the production process of existing samples:

① Poor grinding uniformity. The operator manually grinds both ends of each sample with sandpaper. It is difficult to control the amount of grinding on each surface. The uniformity of surface roughness after grinding and the consistency of each sample are poor, which will cause stickiness Consistency of connection quality is affected.

②The grinding efficiency is low. For each sample, both ends and upper and lower sides are polished, and it takes at least 5 minutes for skilled operators. Usually, the number of mechanical property tests is large, and the grinding process takes a long time.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a rapid processing device for the surface of a composite material test sample with improved grinding uniformity and high efficiency.

The technical solution of the utility model: a rapid processing device for the surface of a composite material test sample, including a bottom plate, a stopper, a pressure plate, a flange, a push rod, a rib and a bracket, and the stoppers are fixedly installed on the front and rear sides of the bottom plate , the rib is fixedly installed on one end of the bottom plate, the bracket is fixedly installed on the block, the ejector rod passes through the bracket and is threadedly connected with the bracket, the upper end of the ejector rod is fixed with the flange, and the lower end of the ejector rod is fixedly connected with the pressure plate, the composite material test sample Placed on the bottom plate, the bottom plate, block, pressure plate and ribs jointly fix the composite material test sample, and limit the movement of the composite material test sample in the three directions of X, Y, and Z.

The vacuum cleaner nozzle is also included, and the vacuum cleaner nozzle is connected with the bracket.

The support is a type II frame structure, which is composed of a beam and vertical beams on both sides, and a threaded hole is processed in the center of the beam.

The ejector rod is a cylindrical structure, and the upper part of the cylindrical structure is processed with threads.

The rib is 0.5±0.2mm lower than the upper surface of the composite material test sample.

The utility model has the beneficial effects compared with the prior art:

(1) The utility model can realize the batch grinding of composite material test samples, and improve the processing efficiency by more than 95%;

(2) The utility model can ensure the uniformity of the sample grinding and the consistency of the surface state, greatly reduce the dispersion coefficient of the mechanical performance test results, and improve the reliability of the test results.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model includes a bottom plate 1, a stopper 2, a pressure plate 3, a flange 4, a push rod 5, a retaining edge 7 and a bracket 8, and the stopper 2 is fixedly installed on the front and rear sides of the bottom plate 1. The side 7 is fixedly installed on one end of the bottom plate 1, the bracket 8 is fixedly installed on the block 2, the ejector rod 5 passes through the bracket 8 and is threadedly connected with the bracket 8, the upper end of the ejector rod 5 is fixed to the flange plate 4, and the lower end of the ejector rod 5 is connected to the pressure plate 3 Fixed connection, the composite material test sample 9 is placed on the bottom plate 1, the bottom plate 1, the block 2, the pressure plate 3 and the rib 7 jointly fix the composite material test sample 9, and the composite material test sample 9 is limited in X, Y, Z movement in three directions.

Bracket 8 is a type II frame structure consisting of beams and vertical beams on both sides. The center of the beam is processed with a threaded hole. The ejector rod 5 passes through the threaded hole in the center of the beam and is threaded. 2 fixed connections.

The ejector rod 5 is a cylindrical structure, the upper part of the cylindrical structure is threaded, and is matched with the beam of the bracket 8, the top of the cylinder is fixedly connected to the flange 4, the lower end of the cylindrical structure is fixedly connected to the pressure plate 3, and the force is transmitted to the pressure plate 3, Thus, the pressing plate 3 can be closely attached to the composite material test sample 9 .

The utility model also includes a vacuum cleaner nozzle 6, which is fixedly connected to the beam of the bracket 8. The vacuum cleaner nozzle 6 is an internal hollow structure, which can be connected to an industrial vacuum cleaner connector hose to absorb fiber dust generated during the grinding process. The mouthpiece is made into a trapezoidal shape to absorb more fiber dust and reduce pollution to the surrounding environment.

When the flange 4 is rotated, the flange 4 transmits the force to the ejector rod 5, and the ejector rod 5 is threadedly matched with the bracket 8 to drive the pressure plate 3 to move up and down to realize loading, unloading and clamping of the composite material test sample 9.

After the composite material test sample 9 is installed in the utility model, the rib 7 is 0.5 ± 0.2mm lower than the upper surface height of the composite material test sample 9, so as to avoid the contact of the flat sandpaper machine with the rib 7 during grinding, causing damage to the rib 7.

The composite material test sample 9 is a plurality of test samples aligned and arranged in a row, which can be a tensile test test sample, a compression test test sample, a bending test test sample or other mechanical performance test samples, the raw material for making the sample Can be unidirectional or plain weave.

The working principle of the utility model:

Turn the flange 4, the force is transmitted to the ejector rod 5, and the ejector rod 5 drives the pressure plate 3 to move upwards, and a plurality of composite material test samples 9 are arranged in a row, aligned against the rib 7, and placed on the bottom plate 1, At this time, the flange plate 4 in the opposite direction transmits the active force to the ejector rod 5, and the ejector rod 5 drives the pressure plate 3 to move downward to clamp the composite material test sample 9. Single-side grinding, using the same method to realize the grinding process of the other side of the composite material test sample 9 and the flip surface, according to the size of the composite material test sample 9, 10 to 50 composite material test samples of varying quantities can be realized at a time. Batch sanding of sample 9.

Before using the utility model, polish the upper and lower sides of both ends of each composite material test sample, and it takes at least 5 minutes for skilled operators. After using the utility model, the time used for processing 100 0° stretching, 90° stretching, 0° compression, and 90° compression samples is respectively 21 minutes, 42 minutes, 10 minutes and 17 minutes, and the efficiency is respectively increased by 95.8%. 91.6%, 98%, and 96.6%.

As shown in Table 1, 100 composite material test samples were manually polished and compared with the utility model. The results prove that the utility model can ensure the uniformity of the sample grinding and the consistency of the surface state, and reduce the mechanical properties to a large extent. The coefficient of dispersion of the test results.

Table 1100 comparison of coefficient of dispersion of mechanical properties of composite material samples

Parts not described in detail in the utility model are well-known technologies for those skilled in the art.

Claims (5)

1. a composite material test specimen surface quick processing device, it is characterized in that: comprise base plate (1), block (2), pressing plate (3), ring flange (4), push rod (5), rib (7) and support (8), block (2) is fixedly mounted on the both sides, front and back of base plate (1), rib (7) is fixedly mounted on base plate (1) one end, support (8) is fixedly mounted on block (2), push rod (5) passes support (8) and is threaded with support (8), push rod (5) upper end and ring flange (4) are fixing, push rod (5) lower end is fixedly connected with pressing plate (3), composite material test sample (9) is placed on base plate (1), base plate (1), block (2), the common fixing composite material test sample (9) of pressing plate (3) and rib (7), restriction composite material test sample (9) is at X, Y, the movement of tri-directions of Z.

2. a kind of composite material test specimen surface quick processing device according to claim 1, is characterized in that: also comprise that suction cleaner connects mouth (6), suction cleaner connects mouth (6) and is connected with support (8).

3. a kind of composite material test specimen surface quick processing device according to claim 1, is characterized in that: described support (8) is II type framed structure, consists of crossbeam center thread mill drilling the vertical beam of crossbeam and both sides.

4. a kind of composite material test specimen surface quick processing device according to claim 1, is characterized in that: described push rod (5) is cylindrical structure, cylindrical structure top machining screw.

5. a kind of composite material test specimen surface quick processing device according to claim 1, is characterized in that: described rib (7) is than the low 0.5 ± 0.2mm of composite material test sample (9) upper level.