CN113466048B

CN113466048B - Constant-load metal tensile test device

Info

Publication number: CN113466048B
Application number: CN202111037252.8A
Authority: CN
Inventors: 谭明强
Original assignee: Nantong At&m New Materials Co ltd
Current assignee: Nantong At&m New Materials Co ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2021-11-23
Anticipated expiration: 2041-09-06
Also published as: CN113466048A

Abstract

The invention provides a constant-load metal tensile test device, and relates to the field of metal tensile tests. This constant load metal tensile test device, the on-line screen storage device comprises a base, the upper end fixedly connected with frame of base, the inside of frame is provided with the slider, one side of slider is rotated and is connected with the lever, the one end of lever is provided with negative pressure device, negative pressure device's upper end and frame cooperation are connected, negative pressure device's lower extreme and the one end of lever are rotated and are connected, the other end of lever is rotated and is connected with the mounting, the top of mounting is provided with the second screw rod, the second screw rod runs through the frame, the lower extreme fixedly connected with mounting of second screw rod, rotation department between slider and the lever is provided with the holder. By generating a constant load by using atmospheric pressure and performing force magnitude conversion by using the lever principle, the device can be miniaturized.

Description

Constant-load metal tensile test device

Technical Field

The invention relates to the technical field of metal tensile tests, in particular to a constant-load metal tensile test device.

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. In the study of materials, real-time testing of the properties of new materials is required, and tensile testing is often a means of determining the properties of materials. In the conventional constant load tensile test of a metal material, the following types of apparatuses are available.

A tensile test is carried out on a metal material by adopting a screw rod, hydraulic pressure, air pressure and other modes, a pressure sensor is arranged in the tensile test, and the load of the metal material is adjusted in real time through the change of pressure. In the device, the change of the load is correspondingly changed along with the deformation of the technical material in the test, but in practice, the adjustment delay exists, the load acting on the metal material is unstable, and the device is not a constant load test. For example, chinese patent discloses a "constant load tensile test device" with application number "201510127403.7", which is mainly used to manually set a load.

One is to hang a weight on the lower end of the material being tested. However, in order to achieve the test of the specified load, the required heavy substance amount is large, the lifting test of the heavy substance is not facilitated, meanwhile, similar test equipment also adopts the lever principle, the acting force of the heavy substance is increased, but the structure is larger in size, and the movement of the device is inconvenient. For example, the chinese patent discloses an "automatic timing device for a constant load tensile test apparatus", which has an application number of "201410085235.5".

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a constant-load metal tensile test device, which solves the problems that the conventional test device cannot provide a constant load or the device for providing the constant load is large in size and not beneficial to movement.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a constant-load metal tensile test device comprises a base, wherein the upper end of the base is fixedly connected with a frame, a sliding block is arranged inside the frame, one side of the sliding block is rotatably connected with a lever, one end of the lever is provided with a negative pressure device, the upper end of the negative pressure device is matched and connected with the frame, the lower end of the negative pressure device is rotatably connected with one end of the lever, the other end of the lever is rotatably connected with a fixing piece, a second screw rod is arranged above the fixing piece and penetrates through the frame, and the lower end of the second screw rod is fixedly connected with the fixing piece;

a clamping piece is arranged at the rotating position between the sliding block and the lever;

the negative pressure device comprises a pull rod, a piston, a cylinder body and a fitting piece, the lower end of the pull rod is rotatably connected with the lever, a clamping groove is formed in the upper end of the frame, the side profile of the fitting piece is I-shaped, and the clamping groove is matched with the fitting piece.

Preferably, the inner side of the frame is provided with a first screw rod, two ends of the first screw rod penetrate through the frame and are rotatably connected with the frame, the first screw rod penetrates through the sliding block and is in threaded connection with the sliding block, and one end of the first screw rod is fixedly connected with the first rotating handle.

Preferably, a polish rod is arranged above the first screw rod, the polish rod penetrates through the sliding block and is in sliding fit with the sliding block, and two ends of the polish rod are fixedly connected with the frame.

Preferably, the lateral wall fixedly connected with fixed axle of slider, the middle part of lever is provided with the bar hole, the fixed axle passes the bar hole, the holder is located the both sides of fixed axle.

Preferably, the clamping part comprises two clamping blocks and fixing bolts, an arc-shaped groove is formed in one side of each clamping block, and the arc-shaped groove is matched with the fixing shaft.

Preferably, the clamping block is provided with a second hole, the inner wall of the second hole is provided with threads, and the fixing bolt is matched with the second hole.

Preferably, the upper end fixedly connected with piston of pull rod, the piston setting with the inside of cylinder body, and the up end of piston and the laminating of the upper wall of cylinder body, the fitting piece is fixed with the upper end middle part of cylinder body.

Preferably, the upper end of the frame is provided with a second rotating handle, the second rotating handle is rotatably connected with the frame, the second screw rod penetrates through the middle of the second rotating handle, and the second rotating handle is rotatably connected with the second screw rod.

Preferably, the middle part of the fixing part is provided with a first hole, and the side wall of the upper part of the fixing part is symmetrically provided with two stop blocks.

(III) advantageous effects

The invention provides a constant-load metal tensile test device. The method has the following beneficial effects:

1. the invention provides a constant load test by using atmospheric pressure, and realizes the test by using the lever to appoint the constant load, thereby ensuring the accuracy of the test.

2. The invention can change the force generated by the negative pressure device by utilizing the lever, namely, the force amplification treatment.

3. The invention can miniaturize the device by using the atmospheric pressure and the lever principle.

4. The invention can replace the negative pressure device and can use the negative pressure device with proper specification to carry out the test.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 1;

FIG. 4 is an exploded view of the negative pressure device of the present invention;

FIG. 5 is an exploded view of the clamp of the present invention;

fig. 6 is a schematic structural view of the fixing member of the present invention.

Wherein, 1, a base; 2. a frame; 201. a card slot; 3. a first screw; 4. a polish rod; 5. a fixing member; 501. a first hole; 502. a stopper; 6. a lever; 601. a strip-shaped hole; 7. a negative pressure device; 701. a pull rod; 702. a piston; 703. a cylinder body; 704. a mating member; 8. a second stem; 9. a second screw; 10. a first stem; 11. a slider; 1101. a fixed shaft; 12. a clamping member; 1201. a clamping block; 12011. an arc-shaped slot; 12012. a second hole; 1202. and (5) fixing the bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1-6, an embodiment of the present invention provides a constant-load metal tensile test apparatus, which includes a base 1, a frame 2 is fixedly connected to an upper end of the base 1, a front profile of the frame 2 is "pi", a rib plate may be additionally provided at a corner of the frame 2 to improve a structural strength of the frame 2 without affecting positions of other structures on the frame 2, a slider 11 is provided inside the frame 2, a lever 6 is rotatably connected to one side of the slider 11, a negative pressure device 7 is provided at one end of the lever 6, a constant load is provided by using an atmospheric pressure manner, a force finally acting on a metal material may be changed by using the lever 6 to realize setting of a specified load, and the atmospheric pressure may change with time and area, a force generated by the negative pressure device 7 may also change, so that a load error caused by instability of the atmospheric pressure may be adjusted by using the lever 6, but in a short time, the change of the atmospheric pressure is small, and the test cannot be influenced.

The upper end of a negative pressure device 7 is connected with the frame 2 in a matching way, the lower end of the negative pressure device 7 is connected with one end of a lever 6 in a rotating way, the other end of the lever 6 is connected with a fixing piece 5 in a rotating way, the two ends of the lever 6 are respectively connected with the negative pressure device 7 and the fixing piece 5 in a rotating way, but when the lever 6 rotates, the motion trail of the rotating connection point is arc-shaped, namely, the rotating connection point moves horizontally and moves vertically, so that a sliding groove in the horizontal direction is required to be arranged on the fixing piece 5 and the negative pressure device 7 to ensure the smooth rotation of the lever 6, the arrangement can ensure that a metal material is tested under a constant load under a certain deformation amount of the metal material, a second screw rod 9 is arranged above the fixing piece 5, the second screw rod 9 penetrates through the frame 2, the fixing piece 5 is fixedly connected with the lower end of the second screw rod 9, and a second rotating handle 8 is arranged at the upper end of the frame 2, the second rotating handle 8 is rotatably connected with the frame 2, the second screw 9 penetrates through the middle of the second rotating handle 8, and the second rotating handle 8 is rotatably connected with the second screw 9.

The rotating part between the sliding block 11 and the lever 6 is provided with a clamping piece 12, the clamping piece 12 is fixed on the lever 6, before the rotating point between the sliding block 11 and the lever 6 is adjusted, the clamping piece 12 needs to be loosened, and the clamping piece 12 is used for limiting the rotating position between the sliding block 11 and the lever 6, so that the moment arm of the lever 6 cannot be changed in the test.

The inboard of frame 2 is provided with first screw rod 3, frame 2 is all run through at the both ends of first screw rod 3, and rotate with frame 2 and be connected, first screw rod 3 runs through slider 11, and with 11 threaded connection of slider, the first handle 10 of the first one end fixedly connected with of first screw rod 3, the top of first screw rod 3 is provided with polished rod 4, polished rod 4 runs through slider 11, and with 11 sliding fit of slider, the both ends of polished rod 4 all with frame 2 fixed connection, loosen holder 12, rotate first handle 10, first screw rod 3 rotates, slide on polished rod 4 with 3 threaded connection's of first screw rod slider 11, realize the regulation of the rotation tie point between slider 11 and the lever 6.

The side wall of the sliding block 11 is fixedly connected with a fixing shaft 1101, the middle of the lever 6 is provided with a strip-shaped hole 601, the fixing shaft 1101 penetrates through the strip-shaped hole 601, the position of a rotating connection point between the sliding block 11 and the lever 6 is adjusted, namely the position of the fixing shaft 1101 in the strip-shaped hole 601 is set, the clamping piece 12 is located on two sides of the fixing shaft 1101, the clamping piece 12 comprises two clamping blocks 1201 and a fixing bolt 1202, the number of the clamping blocks 1201 is two, one side of the clamping block 1201 is provided with an arc-shaped groove 12011, the arc-shaped groove 12011 is matched with the fixing shaft 1101, namely the left and right movement of the fixing shaft 1101 is limited, the clamping block 1201 is provided with a second hole 12012, the inner wall of the second hole 12012 is provided with threads, the fixing bolt 1202 is matched with the second hole 12012, the two clamping blocks 1201 are tightly embraced on the lever 6 through the fixing bolt 1202, and the clamping piece 12 is fixed on the lever 6.

Negative pressure device 7 includes pull rod 701, piston 702, cylinder body 703 and fitting piece 704, the lower extreme and the lever 6 of pull rod 701 rotate to be connected, the upper end of frame 2 is provided with draw-in groove 201, this setting can be convenient for change the negative pressure device 7 of different specifications, the side profile of fitting piece 704 is "worker" font, draw-in groove 201 and fitting piece 704 cooperation, the upper end fixedly connected with piston 702 of pull rod 701, piston 702 sets up the inside with cylinder body 703, and the laminating of the up end of piston 702 and the upper wall of cylinder body 703, when negative pressure device 7 used, namely, through pull rod 701, piston 702 moves down, the top of piston 702 forms the vacuum chamber, and the pressure difference with the external world is an atmospheric pressure, so can pass through the formula:

p is atmospheric pressure, S is the end surface area of the piston 702, it can be calculated that the load of the pull rod 701 can be generated under the negative pressure device 7 with the current atmospheric pressure and specification, the negative pressure devices 7 with different specifications have different end surface areas on the piston 702, and the fitting piece 704 is fixed to the middle part of the upper end of the cylinder body 703.

The middle part of the fixing part 5 is provided with a first hole 501, the upper side wall of the fixing part 5 is symmetrically provided with two stop blocks 502, and the tested metal part is fixed on the fixing part 5 in a bolt mode.

The working principle is as follows: when the device is used, the atmospheric pressure value at the device is measured in advance, the load which can be provided by the negative pressure device 7 is calculated, and the position of a rotating point between the lever 6 and the sliding block 11 is calculated by using a lever formula according to the preset numerical value of the load of the metal material through tests;

before the rotation point between the adjusting lever 6 and the sliding block 11 is adjusted, the fixing bolt 1202 is rotated in advance, the clamping piece 12 is loosened, the first screw rod 3 rotates through the first rotating handle 10, the sliding block 11 in threaded connection with the first screw rod 3 slides on the polished rod 4, the position of the rotation point is changed, then the arc-shaped groove 12011 is attached to the side wall of the fixing shaft 1101, and the position of the clamping piece 12 is fixed;

the two ends of the tested metal material are respectively fixed on the fixing piece 5, then the second rotating handle 8 is rotated to be in threaded fit with the second screw 9, the metal material is subjected to a tensile test, and meanwhile, the piston 702 is ensured to be displaced, namely, a vacuum cavity is formed above the piston 702.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a constant load metal tensile test device, includes base (1), its characterized in that: the upper end of the base (1) is fixedly connected with a frame (2), a sliding block (11) is arranged inside the frame (2), one side of the sliding block (11) is rotatably connected with a lever (6), one end of the lever (6) is provided with a negative pressure device (7), the upper end of the negative pressure device (7) is matched and connected with the frame (2), the lower end of the negative pressure device (7) is rotatably connected with one end of the lever (6), the other end of the lever (6) is rotatably connected with a fixing piece (5), a second screw rod (9) is arranged above the fixing piece (5), the second screw rod (9) penetrates through the frame (2), and the lower end of the second screw rod (9) is fixedly connected with the fixing piece (5);

a clamping piece (12) is arranged at the rotating position between the sliding block (11) and the lever (6);

negative pressure device (7) include pull rod (701), piston (702), cylinder body (703) and fitting piece (704), the lower extreme and lever (6) of pull rod (701) rotate to be connected, the upper end of frame (2) is provided with draw-in groove (201), the side profile of fitting piece (704) is "worker" font, draw-in groove (201) and fitting piece (704) cooperation.

2. The constant-load metal tensile test device according to claim 1, wherein: the inboard of frame (2) is provided with first screw rod (3), frame (2) are all run through at the both ends of first screw rod (3) to rotate with frame (2) and be connected, slider (11) are run through in first screw rod (3) to with slider (11) threaded connection, the first turning handle (10) of one end fixedly connected with of first screw rod (3).

3. A constant load metal tensile test apparatus according to claim 2, wherein: a polish rod (4) is arranged above the first screw rod (3), the polish rod (4) penetrates through the sliding block (11) and is in sliding fit with the sliding block (11), and two ends of the polish rod (4) are fixedly connected with the frame (2).

4. The constant-load metal tensile test device according to claim 1, wherein: the side wall of the sliding block (11) is fixedly connected with a fixing shaft (1101), the middle of the lever (6) is provided with a strip-shaped hole (601), the fixing shaft (1101) penetrates through the strip-shaped hole (601), and the clamping piece (12) is located on two sides of the fixing shaft (1101).

5. The constant-load metal tensile test device according to claim 4, wherein: the clamping piece (12) comprises two clamping blocks (1201) and fixing bolts (1202), an arc-shaped groove (12011) is formed in one side of each clamping block (1201), and the arc-shaped groove (12011) is matched with the fixing shaft (1101).

6. The constant-load metal tensile test device according to claim 5, wherein: the clamping block (1201) is provided with a second hole (12012), the inner wall of the second hole (12012) is provided with threads, and the fixing bolt (1202) is matched with the second hole (12012).

7. The constant-load metal tensile test device according to claim 1, wherein: the upper end of the pull rod (701) is fixedly connected with a piston (702), the piston (702) is arranged in the cylinder body (703), the upper end face of the piston (702) is attached to the upper wall of the cylinder body (703), and the fitting piece (704) is fixed to the middle of the upper end of the cylinder body (703).

8. The constant-load metal tensile test device according to claim 1, wherein: the upper end of frame (2) is provided with second turning handle (8), second turning handle (8) and frame (2) rotate to be connected, second screw rod (9) run through the middle part of second turning handle (8), and second turning handle (8) and second screw rod (9) rotate to be connected.

9. The constant-load metal tensile test device according to claim 1, wherein: the middle part of the fixing piece (5) is provided with a first hole (501), and the side wall of the upper part of the fixing piece (5) is symmetrically provided with two stop blocks (502).