CN215414705U

CN215414705U - Metal strip flexural modulus testing device

Info

Publication number: CN215414705U
Application number: CN202121451323.4U
Authority: CN
Inventors: 陈会云; 李玲
Original assignee: Jiangsu Yancheng Technician College
Current assignee: Jiangsu Yancheng Technician College
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-01-04
Anticipated expiration: 2031-06-18

Abstract

The utility model provides a metal strip bending modulus testing device, which comprises a bottom platform, a thick upright post, a pin shaft, a lever, a connecting rod, a vertical rod, a locking screw, a sliding block, a placing fork, a hand support, a suspender, a thin upright post, a mass block, a bottom support, a sliding groove, a shaft seat and a rotating shaft, wherein the bottom platform, the shaft seat, the thin upright post and the sliding groove form a fixed auxiliary part, the thick upright post, the lever, the connecting rod, the vertical rod and the sliding block form a movable auxiliary part, the shaft seat is arranged on the left side of the bottom platform in a main view, the shaft seat is partially embedded in the bottom platform, the thick upright post is arranged on the shaft seat, the rotating shaft is arranged at the bottom end of the thick upright post, the rotating shaft is inserted in the shaft seat, namely, the thick upright post can rotate, the thin upright post is arranged on the right side of the bottom platform, the placing fork is arranged at the top end of the thin upright post, the bottom end of the thin upright post is connected with the bottom platform through the screw, the position of the sliding block on the lever is adjusted, the pressure of the bottom tip of an upper knife edge on the middle part of a sample can be continuously adjusted, a digital pressure gauge is used for reading a total load value, and calculating the deflection and the flexural modulus according to related formulas.

Description

Metal strip flexural modulus testing device

Technical Field

The utility model relates to a flexural modulus testing instrument, in particular to a metal strip flexural modulus testing device with continuously adjustable load P, and belongs to the technical field of metal material testing.

Background

Young's modulus measurement is a common material test, which is to apply a constant tensile or compressive stress on a sample, measure the elastic deformation amount, the bending modulus is the ratio of the bending stress to the deformation generated by bending, apply a constant bending stress on the sample, measure the elastic bending deflection, the bending modulus is also called the flexural modulus, which is the ability of the material to resist the bending deformation within the elastic limit, generally L, b and d respectively represent the supporting span, width and thickness of the sample, the weight mass m is the load P, calculate the deflection delta or the bending modulus E by the relevant formula, most of the existing material tests are to use the method of hanging down weights as the load P at one end or the central point of the sample, read the deformation data of the sample by a mechanical dial gauge, the load P of a few test devices can not be continuously adjusted, and can only be adjusted in a stepwise manner by the mass and the number of weights, certain inconvenience is brought to certain test operation or test requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a metal strip bending modulus testing device with continuously adjustable load P.

The technical problem to be solved by the utility model is realized by the following technical scheme: the device comprises a bottom platform 1, a thick upright post 2, a pin shaft 8, a lever 9, a connecting rod 10, a vertical rod 11, a locking screw 15, a sliding block 16, a placing fork 17, a hand support 18, a hanging rod 19, a thin upright post 20, a mass block 22, a bottom support 23, a sliding groove 32, a shaft seat 33 and a rotating shaft 34, wherein the bottom platform 1, the shaft seat 33, the thin upright post 20 and the sliding groove 32 form a fixed auxiliary part, and the thick upright post 2, the lever 9, the connecting rod 10, the vertical rod 11 and the sliding block 16 form a movable auxiliary part.

On the front view, the left side of base frame 1 is equipped with axle bed 33, axle bed 33 partially inlays in base frame 1, is equipped with thick stand 2 above axle bed 33, and thick stand 2 bottom is equipped with pivot 34, and pivot 34 is inserted in axle bed 33, and thick stand 2 can rotate promptly, and the right of base frame 1 is equipped with thin stand 20, and thin stand 20 is more far away 30-36 millimeters than thick stand 2 apart from the distance of observer from observer, and thin stand 20 top is equipped with puts fork 17, and thin stand 20 bottom is passed through the screw and is connected with base frame 1.

The top end of the thick upright post 2 and the top end of the thin upright post 20 are provided with a transverse lever 9, a hand support 18 is arranged below one end of the lever 9 close to the thin upright post 20, a connecting rod 10 and a vertical rod 11 are arranged below the lever 9 close to the thick upright post 2, the lever 9, the connecting rod 10 and the vertical rod 11 form a parallelogram structure through four pin shafts, the lever 9 takes the pin shaft 8 at the top end of the thick upright post 2 as a fulcrum, namely the lever 9 can rotate around the pin shaft 8, the vertical rod 11 always faces downwards vertically, a digital pressure gauge 12 is arranged below the vertical rod 11, and an upper knife edge 7 is arranged below the digital pressure gauge 12.

A sliding block 16 is arranged on the lever 9 and between the vertical rod 11 and the thin upright post 20, a locking screw 15 is arranged at the top end of the sliding block 16, a hanging rod 19 and a bottom support 23 are arranged below the sliding block 16, the bottom support 23 is connected with the bottom end of the sliding block 16 through the hanging rod 19, and a mass block 22 can be placed on the bottom support 23.

The upper surface of the base platform 1 is fixed with a sliding groove 32, two movable supports, namely a first support 3 and a second support 27 are arranged on the sliding groove 32, the bottoms of the first support 3 and the second support 27 are both dovetail feet and are embedded in the sliding groove 32, a first inverted-eight-shaped notch 6 is arranged on the inner side of the top end of the first support 3, a first supporting cutter 4 is embedded in the first notch 6, a second inverted-eight-shaped notch 14 is arranged on the inner side of the top end of the second support 27, and a second supporting cutter 26 is embedded in the second notch 14.

An optical micrometer 31 is fixed on the chute 32 and between the first bracket 3 and the second bracket 27, an optical port 13 for light outlet and light inlet is arranged on the top surface of the optical micrometer 31, and the optical micrometer 31 can adopt a commercial light curtain dial gauge, can use laser as a light source and can also use an LED as a light source.

According to the lever principle, the device applies smaller force to the lever far away from the fulcrum, so that larger stress can be obtained at the lever close to the fulcrum, and if the distance far away from the fulcrum is continuously adjustable, continuously variable stress can be obtained on the vertical rod 11 close to the fulcrum. When the test is carried out, the quality or the quantity of the mass block 22 is adjusted according to the requirement, when no proper numerical value exists, the locking screw 15 is loosened, the position of the sliding block 16 on the lever 9 is adjusted, the pressure of the bottom tip of the upper knife edge 7 on the middle part of the test sample 5 can be continuously adjusted, the total load value P is read through the digital pressure gauge 12, and the deflection delta and the bending modulus E are calculated according to a related formula.

Due to the adoption of the technical scheme, the utility model has the advantages and positive effects that: the device can adjust the position of the sliding block on the lever, continuously adjust the pressure of the upper knife edge bottom tip on the middle part of the sample, read the total load value P through the digital pressure gauge, read the deformation data of the sample by adopting the optical microspur instrument and have no mechanical contact with the sample, read the deformation data of the sample more easily, and the support span can be continuously adjusted in a certain range, thereby meeting certain test operation or test requirements.

Drawings

The utility model is further illustrated below with reference to the accompanying drawings and examples, wherein the utility model comprises the following 3 figures:

figure 1 is a front view of the device,

figure 2 is a schematic view of the operation of the apparatus,

fig. 3 is a partial enlarged view of the present device.

The numbers indicated in the figures represent the following, respectively:

1. the test bed comprises a base platform, 2. a thick upright post, 3. a first support, 4. a first supporting knife, 5. a test sample, 6. a first notch, 7. an upper knife edge, 8. a pin shaft, 9. a lever, 10. a connecting rod, 11. a vertical rod, 12. a digital pressure gauge, 13. a light port, 14. a second notch, 15. a locking screw, 16. a sliding block, 17. a placing fork, 18. a hand rest, 19. a hanging rod, 20. a thin upright post, 21. a foot pad, 22. a mass block, 23. a bottom support, 24. a width adjusting button, 25. a main gear, 26. a second supporting knife, 27. a second support, 28. a main rack, 29. an auxiliary gear, 30. an auxiliary rack, 31. an optical microspur instrument, 32. a sliding chute, 33. a shaft seat, 34. a rotating shaft, 35. a pointer and 36 scales.

Detailed Description

According to the figures 1 to 3, the device comprises a bottom platform 1, a thick upright post 2, a first support 3, a first cutter supporting 4, a sample 5, a first notch 6, an upper cutter 7, a pin shaft 8, a lever 9, a connecting rod 10, a vertical rod 11, a digital pressure gauge 12, a smooth port 13, a second notch 14, a locking screw 15, a sliding block 16, a fork 17, a hand rest 18, a hanging rod 19, a thin upright post 20, a foot rest 21, a mass block 22, a bottom rest 23, a width adjusting button 24, a main gear 25, a second cutter supporting 26, a second support 27, a main rack 28, an auxiliary gear 29, an auxiliary rack 30, an optical microspur 31, a sliding groove 32, a shaft seat 33, a rotating shaft 34, a pointer 35 and scales 36.

The base platform 1, the shaft seat 33, the thin upright post 20 and the sliding chute 32 form a fixed auxiliary part, the thick upright post 2, the lever 9, the connecting rod 10, the vertical rod 11 and the sliding block 16 form a movable auxiliary part, the first support 3, the second support 27, the first support knife 4, the second support knife 26 and the upper knife edge 7 form a test base part, the width adjusting button 24, the main gear 25, the main rack 28, the auxiliary gear 29 and the auxiliary rack 30 form a span width adjusting part, and the pointer 33, the scale 34, the digital pressure gauge 12 and the optical micrometer 31 form a comprehensive measurement part.

According to fig. 1, the left side of the base platform 1 is provided with a shaft seat 33, the shaft seat 33 is partially embedded on the base platform 1, the upper surface of the shaft seat 33 is provided with a thick upright post 2, the bottom end of the thick upright post 2 is provided with a rotating shaft 34, the rotating shaft 34 is inserted in the shaft seat 33, namely, the thick upright post 2 can rotate, the right side of the base platform 1 is provided with a thin upright post 20, the distance between the thin upright post 20 and an observer is 30-36 mm longer than the distance between the thick upright post 2 and the observer, the top end of the thin upright post 20 is provided with a placing fork 17, and the bottom end of the thin upright post 20 is connected with the base platform 1 through a screw.

A sliding block 16 is arranged on the lever 9 and between the vertical rod 11 and the thin upright post 20, a locking screw 15 is arranged at the top end of the sliding block 16, a hanging rod 19 and a bottom support 23 are arranged below the sliding block 16, the bottom support 23 is connected with the bottom end of the sliding block 16 through the hanging rod 19, a mass block 22 with a notch can be placed on the bottom support 23, and the notch is clamped on the hanging rod 19.

The upper surface of the base platform 1 is fixed with a sliding groove 32, two movable supports, namely a first support 3 and a second support 27 are arranged on the sliding groove 32, the bottoms of the first support 3 and the second support 27 are both dovetail feet and are embedded in the sliding groove 32, a first inverted-eight-shaped notch 6 is arranged on the inner side of the top end of the first support 3, a first supporting cutter 4 is embedded in the first notch 6, a second inverted-eight-shaped notch 14 is arranged on the inner side of the top end of the second support 27, and a second supporting cutter 26 is embedded in the second notch 14. An optical micrometer 31 is fixed on the chute 32 and between the first bracket 3 and the second bracket 27, an optical port 13 for light outlet and light inlet is arranged on the top surface of the optical micrometer 31, and a commercial light curtain dial gauge can be used as a light source for laser or an LED.

According to fig. 3, an auxiliary gear 29 is arranged in the middle of the sliding chute 32, a main gear 25 is arranged on the right side of the auxiliary gear 29, a width adjusting button 24 is arranged on the rotating shaft of the main gear 25, an auxiliary rack 30 is arranged on one side of the auxiliary gear 29, the left end of the auxiliary rack 30 is connected with the dovetail pin of the first bracket 3, and the right half section of the auxiliary rack is meshed with the auxiliary gear 29; the other side of the auxiliary gear 29 is provided with a main rack 28, the middle part of the main rack 28 is connected with a dovetail foot of the second bracket 27, the right half section is meshed with the main gear 25, the left half section is meshed with the auxiliary gear 29, when the width adjusting button 24 is adjusted, the main gear 25 rotates along with the main gear, through the transmission of the main rack 28 and the auxiliary gear 29, the moving directions of the auxiliary rack 30 and the main rack 28 are opposite, namely the moving directions of the first bracket 3 and the second bracket 27 are opposite, and the first bracket 3 and the second bracket 27 are always symmetrical by the central axis of the auxiliary gear 29; the top surface of the sliding groove 32 is provided with a scale 34, the left wall of the first support 3 is provided with a pointer 33 near the scale 34, and the distance between the vertexes of the first support knife 4 and the second support knife 26 can be read through the pointer 33 and the scale 34.

The top view of the base platform 1 is rectangular, four corners of the bottom of the base platform are provided with the base feet 21, the base feet 21 are made of rubber, the bottom of the base platform is subjected to sanding treatment to increase friction force between the base platform and the test workbench, the base platform 1, the thick upright columns 2, the thin upright columns 20, the sliding grooves 32, the levers 9, the connecting rods 10, the vertical rods 11, the sliding blocks 16, the first supports 3, the second supports 27 and the width adjusting buttons 24 are made of aluminum alloy, the main gear 25, the main rack 28, the auxiliary gear 29 and the auxiliary rack 30 are made of brass, and the upper knife edge 7, the first support knife 4 and the second support knife 26 are made of stainless steel. The widths of the bottoms of the first notch 6 and the second notch 14 are 30.5 mm, and the distance between the vertexes of the first support cutter 4 and the second support cutter 26 is continuously adjustable within the range of 60-160 mm.

The sample 5 is a flat strip with a rectangular cross-section, the material of the strip comprises iron, copper, aluminum, zinc or alloy thereof, the maximum width of the sample 5 which can be tested by the device is 30 mm, and the length range is 65-165 mm. During testing, the material, the width b and the thickness d of the sample 5 to be tested are recorded, the distance between the first supporting cutter 4 and the second supporting cutter 26 is adjusted according to needs, the span value L is recorded through the pointer 33 and the scale 34, the power supply buttons of the digital pressure gauge 12 and the optical microspur instrument 31 are pressed, the locking screw 15 is screwed, the sliding block 16 is prevented from moving on the lever 9, and the flat sample 5 to be tested is placed in the first groove opening 6 and the second groove opening 14.

According to fig. 2, the finger rest 18 is lifted upwards to lift the right side of the lever 9 upwards, the vertical rod 11, the digital pressure gauge 12, the upper knife edge 7, the sliding block 16, the hanging rod 19, the bottom support 23 and the mass block 22 are all lifted upwards to draw the fingers towards the direction of an observer, when the upper knife edge 7 is positioned above the center of the sample 5 and the central axis of the upper knife edge 7 and the central axis of the auxiliary gear 29 are aligned as much as possible, the lever 9 is slowly put down to press the upper knife edge 7 at the center of the sample 5, the fingers are released, after the sample 5 is stable without vibration, the total load P is read through the digital pressure gauge 12, and the descending distance h of the central point of the sample 5 is read through the optical microspur 31.

After the test of one sample 5 is finished, the right side of the lever 9 is tilted by holding the hand support 18 with a finger, the finger is pushed in the direction away from the observer, and when the right side of the lever 9 is positioned above the placing fork 17, the lever 9 is slowly put down, so that the lever 9 is placed in the placing fork 17.

The method can be used for measuring various groups of data of the same material under different support spans L and different loads P, calculating the flexural modulus or the flexural modulus of the same material, and calculating the average value of the flexural modulus or the flexural modulus as a final test result.

The purpose of the thin post 20 being further from the viewer than the thick post 2 is to allow the upper knife edge 7 to be removed from the sample 5 to replace another sample in slot one 6 and slot two 14.

The digital pressure gauge 12 and the optical microspur instrument 31 are both powered by button batteries.

Claims

1. A metal strip bending modulus testing device comprises a bottom platform (1), a thick upright post (2), a pin shaft (8), a lever (9), a connecting rod (10), a vertical rod (11), a locking screw (15), a sliding block (16), a placing fork (17), a hand support (18), a hanging rod (19), a thin upright post (20), a mass block (22), a bottom support (23), a sliding groove (32), a shaft seat (33) and a rotating shaft (34), wherein the bottom platform (1), the shaft seat (33), the thin upright post (20) and the sliding groove (32) form a fixed auxiliary part, and the thick upright post (2), the lever (9), the connecting rod (10), the vertical rod (11) and the sliding block (16) form a movable auxiliary part;

the method is characterized in that: the base platform comprises a base platform (1), wherein a shaft seat (33) is arranged on one side of the base platform (1), the shaft seat (33) is partially embedded in the base platform (1), a thick upright post (2) is arranged on the shaft seat (33), a rotating shaft (34) is arranged at the bottom end of the thick upright post (2), the rotating shaft (34) is inserted into the shaft seat (33), namely the thick upright post (2) can rotate, a thin upright post (20) is arranged on the other side of the base platform (1), a placing fork (17) is arranged at the top end of the thin upright post (20), the bottom end of the thin upright post (20) is connected with the base platform (1) through a screw, a transverse lever (9) is arranged at the top end of the thick upright post (2) and the top end of the thin upright post (20), a hand support (18) is arranged below one end of the lever (9) close to the thin upright post (20), a connecting rod (10) and a vertical rod (11) are arranged below the lever (9) close to the thick upright post (2), the lever (9), the connecting rod (10) and the vertical rod (11) form a parallelogram structure through four pin shafts, the lever (9) can rotate around the pin shaft (8), the vertical rod (11) is always vertical to the lower side, a sliding block (16) is arranged above the lever (9) and between the vertical rod (11) and the thin upright post (20), a locking screw (15) is arranged at the top end of the sliding block (16), a hanging rod (19) and a bottom support (23) are arranged below the sliding block (16), the bottom support (23) is connected with the bottom end of the sliding block (16) through the hanging rod (19), and a mass block (22) is placed above the bottom support (23).