CN113063663A

CN113063663A - Tensile test mechanics experimental facilities

Info

Publication number: CN113063663A
Application number: CN202110311907.XA
Authority: CN
Inventors: 何晓晨; 朱建国; 邵静怡; 杨栋; 朱奇
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-07-02
Anticipated expiration: 2041-03-24
Also published as: CN113063663B

Abstract

The invention discloses tensile test mechanical experiment equipment, which comprises a fixed base, wherein auxiliary rods which are correspondingly arranged are arranged on two sides of the top of the fixed base, fixed rods are arranged between the top of the fixed base and the auxiliary rods, a movable frame is connected between the tops of the fixed rods, an electric pressure rod is fixedly connected to the bottom of the movable frame, a clamping device is arranged at the bottom of the electric pressure rod, a fixed table is arranged at the top of the fixed base and corresponds to the clamping device, and the fixed table is positioned between the fixed rods. The side surface strengthens the tensile force, and is more beneficial to the experiment of the limit of the article.

Description

Tensile test mechanics experimental facilities

Technical Field

The invention belongs to the technical field of tensile testing machines, and particularly relates to tensile testing mechanical experimental equipment.

Background

Tensile test refers to a test method for measuring material properties under an axial tensile load. The data obtained from the tensile test can be used to determine the elastic limit, elongation, elastic modulus, proportional limit, area reduction, tensile strength, yield point, yield strength and other tensile property indexes of the material. The tensile test can determine a series of strength indexes and plasticity indexes of the material. Strength generally refers to the ability of a material to resist elastic deformation, plastic deformation, and fracture under an external force. When a material is subjected to a tensile load, the phenomenon in which the load does not increase but significant plastic deformation continues is called yielding. The stress at yield, known as the yield point or physical yield strength, is expressed in σ S (pascal). There are many materials in engineering that do not have a significant yield point, and the yield strength is usually the stress value at which the material undergoes a residual plastic deformation of 0.2%, referred to as the yield limit or yield strength, and expressed as σ 0.2. The maximum stress value reached by the material before fracture, called the tensile strength or strength limit, expressed as σ b (Pa)

But most volumes of current tensile testing machine are too huge, and very loaded down with trivial details when using, and current tensile testing machine needs to carry out corresponding part to the tensile object of difference and changes moreover, and simultaneously, the stress point of some tensile article needs comparatively even, otherwise just makes article damage easily when can't measuring tensile strength. Therefore, the structure of the tensile testing machine needs to be improved, and meanwhile, tensile testing mechanical experimental equipment is provided, so that the problems are better solved.

Disclosure of Invention

The invention aims to: in order to solve the problems, the tensile test mechanical experiment equipment is provided.

The technical scheme adopted by the invention is as follows:

a tensile test mechanical experiment device comprises a fixed base, auxiliary rods which are correspondingly arranged are fixedly arranged on two sides of the top of the fixed base, a fixed rod is fixedly arranged between the top of the fixed base and the auxiliary rods, a moving frame is connected between the tops of the fixed rods, a positive and negative motor is fixedly connected to the top of the fixed rod, an electric pressure rod is fixedly connected to the bottom of the moving frame, a clamping device is arranged at the bottom of the electric pressure rod, the inner part of the fixed rod is a cavity, a first threaded rod penetrates through the top of the fixed rod in a movable mode, the top of the first threaded rod is fixedly connected with the positive and negative motor, the bottom of the first threaded rod is fixedly connected with the bottom of the fixed rod through a bearing, a moving block is connected to the first threaded rod in a threaded mode, a connecting block is fixedly connected to the, and the connecting block is located the inside of shifting chute, the both ends and the connecting block fixed connection of removal frame, the elevator has been cup jointed in the activity on the dead lever, and the elevator is close to clamping device's one side fixed mounting has electric telescopic handle, electric telescopic handle's opposite face fixedly connected with stripper plate, and the stripper plate is located clamping device's the outside, the fixed station is installed for clamping device's position in unable adjustment base's top, and the fixed station is located between the dead lever, be connected with the screw thread post between the top of auxiliary rod and dead lever.

In a preferred embodiment, the clamping device is composed of a hydraulic cylinder, a hydraulic rod, a connecting plate and a clamping plate, the hydraulic cylinder is fixedly connected to the bottom of the electric pressure rod, and the connecting plate which is correspondingly arranged is fixedly connected to the upper end and the lower end of the hydraulic cylinder.

In a preferred embodiment, the left end and the right end of the hydraulic cylinder are fixedly connected with correspondingly arranged hydraulic rods, one end of each hydraulic rod, far away from the hydraulic cylinder, is fixedly connected with a clamping plate, and the hydraulic rods are located between the two connecting plates.

In a preferred embodiment, the electric pressure lever is provided with a buffer spring, the top of the buffer spring is fixedly connected with the electric pressure lever, and the bottom of the buffer spring is fixedly connected with the hydraulic cylinder.

In a preferred embodiment, the fixed station comprises a fixed station, a fixed plate, a third threaded rod, a rotating rod and a motor, the fixed station is fixedly mounted at the bottom of the fixed base, and the fixed station is located between the fixed rods.

In a preferred embodiment, a transverse T-shaped groove is formed in the middle of the fixing table, and fixing plates arranged correspondingly are slidably mounted on two sides of the T-shaped groove.

In a preferred embodiment, two third threaded rods which are correspondingly arranged are movably penetrated through the fixed plate, the left end of each third threaded rod is fixedly connected with the fixed plate through a bearing, and the right end of each third threaded rod movably penetrates through the right wall of the fixed plate.

In a preferred embodiment, bearing fixedly connected with dwang is passed through in the middle part of the right wall of fixed station, and the dwang sets up and lies in between two third threaded rods with the third threaded rod is corresponding, the right-hand member fixed mounting of dwang and third threaded rod has the pulley, and surrounds on the pulley and be provided with driving belt, the right-hand member fixedly connected with motor of dwang.

In a preferred embodiment, the right end of the threaded column is fixedly connected with the inner wall of the fixed rod through a bearing, the threaded column is meshed with the first threaded rod, the left end of the threaded column movably penetrates through the left wall of the fixed rod and the right wall of the auxiliary rod, and one end extending into the auxiliary rod is fixedly connected with the first gear.

In a preferred embodiment, there is the second threaded rod at both ends about the inner wall of auxiliary rod through bearing fixed mounting, and the top fixed mounting of second threaded rod has the second gear, first gear meshes with the second gear mutually, threaded connection has the driven piece on the second threaded rod, and the driven piece passes through connecting piece fixedly connected with lifter block, the shifting chute has been seted up to the one side that the auxiliary rod is close to the dead lever, and the driven piece is located the shifting chute.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the positive and negative motors drive the first threaded rod to rotate so as to drive the threaded column to rotate, so that the first threaded rod and the second threaded rod are kept to synchronously rotate, the movable frame and the electric telescopic rod can synchronously move, the uniform stress of a clamped stretched article is accurately ensured, the data precision of a stretching experiment is further improved, and meanwhile, due to the double stretching of the movable frame and the electric compression bar, the stretching force is enhanced on the side surface, so that the limit experiment on the article is more facilitated.

2. According to the invention, the clamping device can be used for carrying out common clamping on the article, when the article is a tubular article, the clamping plate can be extruded on the inner wall by utilizing the hydraulic rod from the inside of the tubular article, then the electric telescopic rod is started, so that the outer wall of the tubular article is fixed by the extruding plate, stress points are dispersed, and a higher stabilizing effect is achieved in a stretching experiment.

3. According to the invention, the fixing plate on the fixing table fixes the articles by using the T-shaped groove, the third threaded rod can be rotated only by starting the motor, so that the fixing plate is driven to move to clamp the articles, the fixing plate can be taken down at any time according to different stretched articles for replacement, and the clamping can be completed without too many tools, so that the clamping is very convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of an auxiliary rod and a fixing rod according to the present invention;

FIG. 3 is a top view of the stationary platen of the present invention;

FIG. 4 is a left side view of the stationary platen of the present invention;

FIG. 5 is a top view of the clamping device of the present invention.

The labels in the figure are: 1-a fixed base, 2-an auxiliary rod, 3-a fixed rod, 4-a moving frame, 5-a positive and negative motor, 6-an electric compression rod, 7-a clamping device, 8-a first threaded rod, 9-a moving block, 10-a connecting block, 11-a lifting block, 12-an electric expansion rod, 13-a squeezing plate, 14-a fixed table, 15-a threaded column, 16-a hydraulic cylinder, 17-a hydraulic rod, 18-a connecting plate, 19-a clamping plate, 20-a fixed table, 21-a fixed plate, 22-a third threaded rod, 23-a rotating rod, 24-a motor, 25-a first gear, 26-a second threaded rod and 27-a second gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-5, a tensile test mechanical experiment device comprises a fixed base 1, auxiliary rods 2 are fixedly installed on two sides of the top of the fixed base 1, fixed rods 3 are fixedly installed between the top of the fixed base 1 and the auxiliary rods 2, a movable frame 4 is connected between the tops of the fixed rods 3, a positive and negative motor 5 is fixedly connected with the top of the fixed rod 3, the positive and negative motor 5 drives a first threaded rod 8 to rotate, and further drives a threaded column 15 to rotate, so that the first threaded rod and a second threaded rod 8 26 keep synchronous rotation, and the movable frame 4 and an electric telescopic rod 12 can also move synchronously, further accurately ensuring uniform stress of a clamped tensile object, further improving data accuracy of a tensile test, and simultaneously, due to double stretching of the movable frame 4 and the electric press rod 6, the side surface strengthens tensile force, more do benefit to the limit of article to experiment, the bottom of the movable frame 4 is fixedly connected with the electric pressure lever 6, and the bottom of the electric pressure lever 6 is provided with the clamping device 7, the clamping device 7 is composed of a hydraulic cylinder 16, a hydraulic rod 17, a connecting plate 18 and a clamping plate 19, the bottom of the electric pressure lever 6 is fixedly connected with the hydraulic cylinder 16, the upper end and the lower end of the hydraulic cylinder 16 are fixedly connected with the connecting plate 18 which are correspondingly arranged, the left end and the right end of the hydraulic cylinder 16 are fixedly connected with the hydraulic rod 17 which are correspondingly arranged, the end of the hydraulic rod 17 far away from the hydraulic cylinder 16 is fixedly connected with the clamping plate 19, the hydraulic rod 17 is positioned between the two connecting plates 18, the electric pressure lever 6 is provided with a buffer spring, the top of the buffer spring is fixedly connected with the electric pressure lever 6, the bottom is fixedly, a first threaded rod 8 is movably penetrated through the top of the fixing base 1, the top of the first threaded rod 8 is fixedly connected with a positive and negative motor 5, the bottom of the first threaded rod 8 is fixedly connected with the bottom of a fixing rod 3 through a bearing, a moving block 9 is connected with the first threaded rod 8 in a threaded manner, the inner side of the moving block 9 is fixedly connected with a connecting block 10, a moving groove is formed in the opposite surface of the fixing rod 3, the connecting block 10 is positioned in the moving groove, the two ends of a moving frame 4 are fixedly connected with the connecting block 10, a lifting block 11 is movably sleeved on the fixing rod 3, an electric telescopic rod 12 is fixedly arranged on one surface of the lifting block 11 close to a clamping device 7, a squeezing plate 13 is fixedly connected with the opposite surface of the electric telescopic rod 12, the squeezing plate 13 is positioned on the outer side of the clamping device 7, a fixing table 14 is arranged on the top, the fixing table 14 is composed of a fixing table 20, a fixing plate 21, a third threaded rod 22, a rotating rod 23 and a motor 24, the fixing table 20 is fixedly installed at the bottom of the fixing base 1, the fixing table 20 is located between the fixing rods 3, a transverse T-shaped groove is formed in the middle of the fixing table 20, the fixing plates 21 which are correspondingly arranged are slidably installed on two sides of the T-shaped groove, the fixing plate 21 on the fixing table 20 fixes objects through the T-shaped groove, the third threaded rod 22 can rotate only by starting the motor 24, the fixing plate 21 is driven to move to clamp the objects, the fixing plate can be taken down at any time according to different stretched objects to be replaced, and the fixing can be completed without too many tools, so that great convenience is achieved, the fixing plate 21 is movably penetrated with the two third threaded rods 22 which are correspondingly arranged, and the left end of the third threaded rod 22 is fixedly connected, the right end of the right wall of the fixed plate 21 is movably penetrated, the middle part of the right wall of the fixed table 20 is fixedly connected with a rotating rod 23 through a bearing, the rotating rod 23 and the third threaded rod 22 are correspondingly arranged and are positioned between the two third threaded rods 22, pulleys are fixedly arranged at the right ends of the rotating rod 23 and the third threaded rods 22, a transmission belt is arranged on each pulley in a surrounding way, a motor 24 is fixedly connected with the right end of the rotating rod 23, a threaded column 15 is connected between the auxiliary rod 2 and the top of the fixed rod 3, the right end of the threaded column 15 is fixedly connected with the inner wall of the fixed rod 3 through a bearing, the threaded column 15 is meshed with the first threaded rod 8, the left end of the threaded column 15 movably penetrates through the left wall of the fixed rod 3 and the right wall of the auxiliary rod 2, one end extending to the inside of the auxiliary rod 2 is fixedly connected with a first gear 25, and a second gear 27 is fixedly mounted above the second threaded rod 26, the first gear 25 is meshed with the second gear 27, a driven block is connected to the second threaded rod 26 in a threaded manner and is fixedly connected with the lifting block 11 through a connecting piece, a moving groove is formed in one surface, close to the fixed rod 3, of the auxiliary rod 2, and the driven block is located in the moving groove.

The working principle is as follows: in this application, put on fixed station 20 with the article that need stretch, convenient starter motor 24, and then drive dwang 23 and rotate, the pulley just can then rotate this moment, and then drives third threaded rod 22 and rotate under drive belt's effect to make fixed plate 21 fix the centre gripping to article on the T type groove of fixed station 20.

In this application, when the article bottom is fixed, start positive and negative motor 5 and control 8 rotations of first threaded rod, and then make the movable block 9 drive connecting block 10 and descend, the movable rack 4 then descends this moment, nimble application hydraulic stem 17 of shape according to tensile article is fixed to it, and simultaneously, because 8 rotations of first threaded rod, and then drive threaded column 15 and rotate, make first gear 25 drive second gear 26 and rotate, second gear 27 drives second threaded rod 26 and rotates, and then control elevator 11 descends, it is fixed once more to the outer wall of article this moment through stripper plate 13 on electric telescopic handle 12, thereby the dispersion stress point, after whole fixed, it can to start electric compression bar 6 or positive and negative motor 5 and carry out tensile experiment.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a tensile test mechanics experimental facilities, includes unable adjustment base (1), its characterized in that: auxiliary rods (2) which are correspondingly arranged are fixedly arranged on two sides of the top of the fixed base (1), fixed rods (3) are fixedly arranged on the top of the fixed base (1) relative to the auxiliary rods (2), a moving frame (4) is connected between the tops of the fixed rods (3), a positive and negative motor (5) is fixedly connected to the top of each fixed rod (3), an electric pressure rod (6) is fixedly connected to the bottom of each moving frame (4), a clamping device (7) is installed at the bottom of each electric pressure rod (6), a cavity is formed inside each fixed rod (3), a first threaded rod (8) penetrates through the top of each fixed rod in a movable mode, the top of each first threaded rod (8) is fixedly connected with the corresponding positive and negative motor (5), the bottom of each first threaded rod (8) is fixedly connected with the bottom of the corresponding fixed rod (3) through a bearing, and a moving block (9) is connected to each first, and the inner side of the moving block (9) is fixedly connected with a connecting block (10), the opposite surface of the fixed rod (3) is provided with a moving groove, the connecting block (10) is positioned inside the moving groove, two ends of the moving frame (4) are fixedly connected with the connecting block (10), the fixed rod (3) is movably sleeved with a lifting block (11), an electric telescopic rod (12) is fixedly arranged on one surface of the lifting block (11) close to the clamping device (7), the opposite surface of the electric telescopic rod (12) is fixedly connected with an extrusion plate (13), the extrusion plate (13) is positioned at the outer side of the clamping device (7), a fixed table (14) is arranged at the top of the fixed base (1) corresponding to the position of the clamping device (7), and the fixed table (14) is positioned between the fixed rods (3), and a threaded column (15) is connected between the top parts of the auxiliary rod (2) and the fixed rods (3).

2. A tensile testing mechanical experimental apparatus according to claim 1, wherein: clamping device (7) comprise pneumatic cylinder (16), hydraulic stem (17), connecting plate (18) and grip block (19), the bottom fixedly connected with pneumatic cylinder (16) of electronic depression bar (6), and the corresponding connecting plate (18) that sets up of upper and lower both ends fixedly connected with of pneumatic cylinder (16).

3. A tensile testing mechanical experimental apparatus according to claim 2, wherein: the hydraulic cylinder (16) is fixedly connected with hydraulic rods (17) which are correspondingly arranged at the left end and the right end, one end, far away from the hydraulic cylinder (16), of each hydraulic rod (17) is fixedly connected with a clamping plate (19), and each hydraulic rod (17) is located between two connecting plates (18).

4. A tensile testing mechanical experimental apparatus according to claim 3, wherein: and the electric pressure lever (6) is provided with a buffer spring, the top of the buffer spring is fixedly connected with the electric pressure lever (6), and the bottom of the buffer spring is fixedly connected with the hydraulic cylinder (16).

5. A tensile testing mechanical experimental apparatus according to claim 1, wherein: fixed station (14) comprise fixed station (20), fixed plate (21), third threaded rod (22), dwang (23) and motor (24), the bottom fixed mounting of unable adjustment base (1) has fixed station (20), and fixed station (20) are located between dead lever (3).

6. The tensile testing mechanical experimental facility of claim 5, wherein: the middle part of the fixed table (20) is provided with a transverse T-shaped groove, and the two sides of the T-shaped groove are provided with fixed plates (21) which are correspondingly arranged in a sliding manner.

7. A tensile testing mechanical experimental facility according to claim 6, wherein: the fixed plate (21) is movably provided with two third threaded rods (22) which are correspondingly arranged in a penetrating manner, the left ends of the third threaded rods (22) are fixedly connected with the fixed plate (21) through bearings, and the right ends of the third threaded rods movably penetrate through the right wall of the fixed plate (21).

8. A tensile testing mechanical experimental facility according to claim 7, wherein: bearing fixedly connected with dwang (23) is passed through at the right wall middle part of fixed station (20), and dwang (23) and third threaded rod (22) corresponding setting and lie in between two third threaded rod (22), the right-hand member fixed mounting of dwang (23) and third threaded rod (22) has the pulley, and surrounds on the pulley and is provided with driving belt, the right-hand member fixedly connected with motor (24) of dwang (23).

9. A tensile testing mechanical experimental apparatus according to claim 1, wherein: the right-hand member of screw thread post (15) passes through the inner wall fixed connection of bearing and dead lever (3), and screw thread post (15) and first threaded rod (8) mesh mutually, the left end activity of screw thread post (15) runs through the left wall of dead lever (3) and the right wall of auxiliary rod (2), and extends to the inside one end fixedly connected with first gear (25) of auxiliary rod (2).

10. A tensile testing mechanical experimental apparatus according to claim 9, wherein: bearing fixed mounting is passed through at both ends about the inner wall of auxiliary rod (2) has second threaded rod (26), and the top fixed mounting of second threaded rod (26) has second gear (27), first gear (25) mesh mutually with second gear (27), threaded connection has the driven piece on second threaded rod (26), and the driven piece passes through connecting piece fixedly connected with elevator block (11), the shifting chute has been seted up in the one side that auxiliary rod (2) are close to dead lever (3), and the driven piece is located the shifting chute.