CN219573806U

CN219573806U - Simple beam impact test equipment for plastic impact test

Info

Publication number: CN219573806U
Application number: CN202320675716.6U
Authority: CN
Inventors: 张世静; 高金亮
Original assignee: TIANXIANG (TIANJIN) QUALITY TECHNOLOGY SERVICE CO LTD
Current assignee: TIANXIANG (TIANJIN) QUALITY TECHNOLOGY SERVICE CO LTD
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-08-22
Anticipated expiration: 2033-03-30

Abstract

The utility model provides simple beam impact test equipment for plastic impact test, which comprises an impact pendulum, a pendulum bob, a supporting beam, a fixing component and a pendulum placing mechanism, wherein the pendulum bob is arranged on the supporting beam; the pendulum bob is fixed at the tail end of the impact pendulum, and is connected with the impact pendulum screw; the impact pendulum is fixed on the supporting beam, and the top of the impact pendulum is rotationally connected with the supporting beam; the swing-releasing mechanism is fixed on the test equipment and used for supporting/releasing the impact swing; the fixed component is positioned below the pendulum bob and used for placing and positioning the piece to be measured. The utility model has the beneficial effects that: the potential safety hazard of unexpected swing of pendulum is overcome, the precision of impact test is improved simultaneously.

Description

Simple beam impact test equipment for plastic impact test

Technical Field

The utility model belongs to the field of non-metal material impact toughness measurement equipment, and particularly relates to simple beam impact test equipment.

Background

In the departments of chemical industry, scientific research units, universities and colleges, quality detection and the like, it is often necessary to measure the impact toughness of some nonmetal materials such as hard plastics, reinforced nylon, glass fiber reinforced plastics, ceramics, cast stones, electric insulation materials and the like so as to enhance the understanding of the material properties of the materials. The impact toughness of a piece to be tested is measured by simple beam impact test equipment generally, and the principle is that a pendulum with known energy is used for swinging and striking the piece to be tested which is supported into a horizontal beam through gravity, the piece to be tested is damaged by one-time impact of the pendulum, and finally the ultimate impact toughness of the piece to be tested is counted. The existing simple beam impact test equipment has some inconveniences: the pendulum bob needs to be fixed at a certain height to obtain potential energy, and then a piece to be tested is placed at the bottom after the pendulum bob is fixed, and during the period, the pendulum bob can accidentally swing to impact the piece to be tested in advance, so that potential safety hazards are caused. Meanwhile, the conventional simple beam impact test equipment generally marks scale marks on the bottom fixing unit, the to-be-tested piece is correctly arranged at the designated impact position through the scale marks, the arrangement process is relatively complicated, the accuracy of the alignment position of the to-be-tested piece is low, and meanwhile, the device cannot be compatible with the to-be-tested pieces with multiple sizes.

Disclosure of Invention

In view of the above, the utility model aims to provide a simple beam impact test device for plastic impact test, so as to overcome the potential safety hazard of accidental swing of a pendulum bob and improve the accuracy of impact test.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a simple beam impact test device for plastic impact test.

Further, the device comprises an impact pendulum, a pendulum bob, a supporting beam, a fixing component and a pendulum placing mechanism; the pendulum bob is fixed at the tail end of the impact pendulum, and is connected with the impact pendulum screw; the impact pendulum is fixed on the supporting beam, and the top of the impact pendulum is rotationally connected with the supporting beam; the swing-releasing mechanism is fixed on the test equipment and used for supporting/releasing the impact swing; the fixed component is positioned below the pendulum bob and used for placing and positioning the piece to be measured.

Further, weights are arranged on the side surfaces of the pendulum bobs and are connected with the pendulum bobs through screws; the middle part of pendulum is provided with the opening, and the opening inboard is provided with the impact cutting edge, and the opening both sides are provided with the support cutting edge.

Further, the swing mechanism comprises a fixed shaft and a safety pin; the safety pin is in sliding connection with the fixed shaft; and a clamping key is arranged on the swing arm of the impact pendulum and is used for supporting the impact pendulum in a contact fit with the safety pin.

Further, the fixing component comprises a jaw block, a wedge block and a fixing support block; the fixed support block is a U-shaped metal block; the wedge-shaped block and the jaw block are arranged at the top of the fixed support block, and the wedge-shaped block is connected with the fixed support block through screws; the wedge surface of the wedge-shaped block is contacted with the inclined surface of the jaw block and is used for extruding and fixing the jaw block.

Further, the fixing assembly further comprises a centering template, wherein the centering template is a standard sheet with a width mark, and is provided with a positioning bayonet and a V-shaped notch; the centering sample plate is placed on the installation position of the jaw block, the positioning bayonet is matched with the jaw block for positioning, the V-shaped notch is matched with the impact cutting edge for adjusting and positioning the position of the jaw block on the fixed support block, and then the workpiece to be measured is correctly placed on the jaw block.

Further, the centering sample plate has a plurality of specifications with different width sizes for adjusting the width requirements of the fixing assembly.

Further, the jaw block has a plurality of specifications with different sizes for placing pieces to be tested with a plurality of sizes.

Further, the test equipment further comprises a protective cover arranged around the fixing assembly, and a layer of foam is arranged on the inner side of the protective cover and used for preventing fragments of the piece to be tested from splashing due to impact, and weakening kinetic energy of excessive impact when the pendulum bob swings down.

Compared with the prior art, the simple beam impact test equipment for plastic impact test has the following beneficial effects:

(1) According to the simple beam impact test equipment for plastic impact test, disclosed by the utility model, the weights are arranged on the side surfaces of the pendulum bobs and are connected with the pendulum bobs through the screws, and the weights with proper mass are selected according to the requirement of impact strength and are arranged on the pendulum bobs through the screw connection, so that the process of changing the impact strength is simplified, and the accuracy of impact test is improved;

(2) According to the simple beam impact test equipment for plastic impact test, the impact pendulum can be placed in a vectored manner through the mechanical fixing support of the safety pin by the pendulum placing mechanism, so that the potential safety hazard of accidental falling of the impact pendulum is reduced;

(3) According to the simple beam impact test equipment for plastic impact test, the width distance between the two jaw blocks can be adjusted by using the centering templates with different widths, so that the impact cutting edge is centered, and meanwhile, the jaw blocks are fixed by using the wedge blocks so as to adapt to-be-tested pieces with different sizes or different impact requirements, and the impact centering operation process is simplified;

(4) According to the simple beam impact test equipment for plastic impact test, the protective cover can be placed around the fixed component and used for preventing fragments of a piece to be tested from splashing caused by impact, and meanwhile, the pendulum bob can be prevented from being excessively impacted.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of an isometric view of a test apparatus (not swung up) according to an embodiment of the present utility model;

FIG. 2 is a schematic front view of a test apparatus (not swung up) according to the present utility model;

FIG. 3 is an isometric view of a securing mechanism according to an embodiment of the present utility model;

FIG. 4 is a schematic elevation view of a test apparatus (swing up) according to an embodiment of the present utility model;

FIG. 5 is a schematic view of an axial view of a test apparatus (swing up) according to an embodiment of the present utility model;

FIG. 6 is an exploded pictorial view of a pendulum according to an embodiment of the present utility model;

FIG. 7 is a schematic view of an axial view of a test apparatus according to an embodiment of the present utility model.

Reference numerals illustrate:

101-impacting a pendulum; 102-a clamping key; 201-pendulum bob; 202-weight; 3-corbels; 401-a fixed shaft; 402-a shear pin; 501-a jaw block; 502-wedge blocks; 503-fixing the holder block; 504-centering template; 6-protecting cover.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The technical scheme is mainly used for measuring impact toughness of nonmetal materials such as hard plastics (including plates, pipes and plastic profiles), reinforced nylon, glass fiber reinforced plastics, ceramics, cast stone, electric insulating materials and the like. The working principle of the test equipment is as follows: the part to be measured is supported as a horizontal beam, as shown in fig. 2 and 4, and is impacted with a pendulum 201 of known energy until the pendulum 201 can impact once even if the part to be measured breaks. The impact line of the pendulum 201 is located in the middle of the two fixed supports, so that the energy difference between the front pendulum 201 and the rear pendulum 201 is impacted, and the energy absorbed by the to-be-detected piece during the damage is determined. The impact strength was then calculated from the original cross-sectional area of the sample.

As shown in fig. 1-2, the main body of the test equipment consists of an impact pendulum 101, a pendulum 201, a supporting beam 3, a fixing component and a pendulum placing mechanism, wherein the pendulum 201 is fixed at the tail end of the impact pendulum 101, and the pendulum 201 is connected with the impact pendulum 101 through screws; the impact pendulum 101 is fixed on the supporting beam 3, and the top of the impact pendulum 101 is rotationally connected with the supporting beam 3; the swing-out mechanism is fixed on the test equipment and is used for supporting/releasing the impact swing 101; the fixed assembly is located below the pendulum 201 for placement and positioning of the part under test.

Advantageously, as shown in fig. 6, a weight 202 is mounted on the side of the pendulum 201, and the weight 202 is screwed to the pendulum 201. Before or during the test of the test equipment, the impact pendulum 101 can be naturally flattened, the screw for connecting the weight 202 and the pendulum 201 is detached, the weight 202 is taken down, the weight 202 with proper mass is selected according to the requirement of the impact strength, and the weight 202 is installed on the pendulum 201 through the screw connection, so that the process of changing the impact strength is simplified, and the accuracy of the impact test is improved.

Alternatively, as shown in fig. 6, four weights 202 may be mounted on the pendulum 201, or two weights 202 may be mounted on the pendulum 201, so that the impact strength adjusting process is more flexible and convenient.

As shown in fig. 5, the swing mechanism comprises a fixed shaft 401 and a safety pin 402; the safety pin 402 is in sliding connection with the fixed shaft 401; a clamping key 102 is arranged on the swing arm of the impact pendulum 101, and the clamping key 102 is used for supporting the impact pendulum 101 in a contact fit with a safety pin 402. Alternatively, the fixing shaft 401 is firmly fixed on a side plate of the test device, the safety pin 402 is slidably connected with the fixing shaft 401 through a shaft sleeve, and can perform axial movement, the movement direction of the safety pin is perpendicular to the swing direction of the impact pendulum 101, and the safety pin 402 can be manually pulled out to be clamped. When the impact pendulum 101 is fixed, the impact pendulum 101 is manually lifted, and then the clamping key 102 of the impact pendulum 101 is contacted and matched with the safety pin 402 to support the impact pendulum 101, so that the impact pendulum 101 is prevented from naturally falling down due to gravity. After the workpiece to be tested is placed in place, the safety pin 402 is manually pulled, the impact pendulum 101 loses the axial supporting force to start to naturally swing down and rotate, and finally the workpiece to be tested is impacted to complete an impact test. The pendulum placing mechanism is fixedly supported by a mechanical safety pin 402, so that the impact pendulum 101 can be placed in a vectored manner, and the potential safety hazard of accidental falling of the impact pendulum 101 is reduced.

As shown in fig. 3, the fixing component is located directly under the impact pendulum 101, and is mainly used for centering and supporting the part to be tested to complete the impact test of the impact pendulum 101. The fixed assembly includes a jaw block 501, a wedge block 502, and a fixed holder block 503; the fixed support block 503 is a U-shaped metal block; the wedge block 502 and the jaw block 501 are arranged on the top of the fixed support block 503, and the wedge block 502 is connected with the fixed support block 503 through screws; the wedge surface of the wedge block 502 contacts the inclined surface of the jaw block 501 for pressing and fixing the jaw block 501. The pendulum 201 is provided with an opening in the middle, impact blades are provided on the inner side of the opening, and supporting blades are provided on both sides of the opening. The fixing assembly further comprises a centering template 504, wherein the centering template 504 is a standard sheet with a width mark, and the centering template 504 is provided with a centering bayonet and a V-shaped notch; the centering sample plate 504 is placed on the installation position of the jaw block 501, the positioning bayonet is matched with the jaw block 501 for positioning, the V-shaped notch is matched with the impact knife edge for adjusting and positioning the position of the jaw block 501 on the fixed support block 503, and then the piece to be measured is correctly placed on the jaw block 501. The width distance between the two jaw blocks 501 can be adjusted by using the centering templates 504 with different widths, so that the impact cutting edge is centered, and meanwhile, the jaw blocks 501 are fixed by using the wedge blocks 502 so as to adapt to the to-be-tested pieces with different sizes or different impact requirements, and the impact centering operation process is simplified.

Alternatively, the centering plate 504 may have a variety of different width dimension gauges for adjusting the width requirements of the securing assembly. Jaw block 501 has a variety of different sizes for placing a variety of sizes of test pieces.

Optionally, as shown in fig. 7, a protective cover 6 may be placed around the fixing component, and a layer of foam is disposed on the inner side of the protective cover 6, so as to prevent fragments of the workpiece to be tested from splashing due to impact, and weaken excessive kinetic energy of impact when the pendulum 201 swings down, so that the kinetic energy is reduced once the pendulum 201 swings down, and weaken the maximum amplitude of damping motion of the pendulum.

In a specific embodiment, the test device meets the requirements of ISO 179, GB/T1043, GB/T2611 and standards, and main technical parameters of the main impact test are shown in the following table I:

list one

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A simple beam impact test device for plastic impact test is characterized in that: the device comprises an impact pendulum (101), a pendulum bob (201), a supporting beam (3), a fixing component and a pendulum placing mechanism;

the pendulum bob (201) is fixed at the tail end of the impact pendulum (101), and the pendulum bob (201) is connected with the impact pendulum (101) through a screw;

the impact pendulum (101) is fixed on the supporting beam (3), and the top of the impact pendulum (101) is rotationally connected with the supporting beam (3);

the swing-out mechanism is fixed on the test equipment and is used for supporting/releasing the impact swing (101);

the fixing component is positioned below the pendulum bob (201) and is used for placing and positioning the to-be-tested piece.

2. The simple beam impact test device for plastic impact test according to claim 1, wherein: a weight (202) is arranged on the side face of the pendulum bob (201), and the weight (202) is connected with the pendulum bob (201) through a screw;

the middle part of pendulum (201) is provided with the opening, and the opening inboard is provided with the impact cutting edge, and the opening both sides are provided with the support cutting edge.

3. The simple beam impact test device for plastic impact test according to claim 1, wherein: the swing mechanism comprises a fixed shaft (401) and a safety pin (402);

the safety pin (402) is in sliding connection with the fixed shaft (401);

a clamping key (102) is arranged on a swing arm of the impact pendulum (101), and the clamping key (102) is used for supporting the impact pendulum (101) in a contact fit manner with a safety pin (402).

4. The simple beam impact test device for plastic impact test according to claim 2, wherein: the fixing assembly comprises a jaw block (501), a wedge block (502) and a fixing support block (503);

the fixed support block (503) is a U-shaped metal block;

the wedge-shaped block (502) and the jaw block (501) are arranged at the top of the fixed support block (503), and the wedge-shaped block (502) is connected with the fixed support block (503) through screws;

the wedge surface of the wedge block (502) is contacted with the inclined surface of the jaw block (501) for pressing and fixing the jaw block (501).

5. The simple beam impact test device for plastic impact test according to claim 4, wherein: the fixing assembly further comprises a centering template (504), wherein the centering template (504) is a standard sheet with a width mark, and the centering template (504) is provided with a counterpoint bayonet and a V-shaped notch;

the centering sample plate (504) is placed on the installation position of the jaw block (501), the positioning bayonet is matched with the jaw block (501) for positioning, the V-shaped notch is matched with the impact cutting edge for adjusting and positioning the position of the jaw block (501) on the fixed support seat block (503), and then the piece to be measured is correctly placed on the jaw block (501).

6. The simple beam impact test device for plastic impact test according to claim 5, wherein: the centering plate (504) has a plurality of different width dimension specifications for adjusting the width requirements of the fixture assembly.

7. The simple beam impact test device for plastic impact test according to claim 4, wherein: the jaw block (501) has a plurality of different sizes for placing a plurality of sizes of pieces to be tested.

8. The simple beam impact test device for plastic impact test according to claim 1, wherein: the test equipment further comprises a protective cover (6) arranged around the fixing assembly, and a layer of foam is arranged on the inner side of the protective cover (6) and used for preventing fragments of the piece to be tested from splashing due to impact, and weakening kinetic energy of excessive impact when the pendulum bob (201) swings down.