CN215296918U

CN215296918U - Double-push adjustable span bending mechanical property test auxiliary tool

Info

Publication number: CN215296918U
Application number: CN202121494230.XU
Authority: CN
Inventors: 郭建东; 李宇罡; 王晓猛; 潘江涛; 王磊; 蒲保东; 王鹏举
Original assignee: Anhui Xiangbang Composite Material Ltd
Current assignee: Anhui Xiangbang Composite Material Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-12-24
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses a double-push span-adjustable bending mechanical property test auxiliary tool, which comprises a machine body and two groups of supporting components, wherein the machine body is provided with a distance adjusting component for adjusting the distance between the two groups of supporting components, and the distance adjusting component comprises a lead screw which is rotationally connected with the machine body and a hand wheel which is fixedly connected with the end part of the lead screw; the supporting component is in threaded connection with the lead screw and moves synchronously and oppositely along the lead screw. According to the mechanical property bending test device, for mechanical property bending tests with different span requirements, the lead screw can be driven to rotate by rotating the hand wheel, at the moment, the lead screw is in threaded fit with the roller base and drives the roller base to move, so that the supporting assemblies are driven to slide on the machine body, the adjustment of adjusting the distance between the two groups of supporting assemblies is realized, and the device is simple and convenient; and the limiting effect of the lead screw effectively reduces the possibility that the support assembly slides along the axial direction of the machine body, and ensures the test result of the bending test.

Description

Double-push adjustable span bending mechanical property test auxiliary tool

Technical Field

The utility model relates to an experimental detection device technical field especially relates to two experimental aids of pushing away adjustable span bending mechanical properties.

Background

At present, a three-point bending test is often adopted when testing mechanical performance indexes such as bending mechanical performance, fracture toughness and the like of metal materials and non-metal materials. The three-point bending test is that a strip-shaped sample is flatly placed in a bending test fixture to form a simple beam form, the distance between two lower supporting points for supporting the sample is adjustable according to the length of the sample, a loading point is arranged above the sample, three-point bending occurs when three contact points form two equal moments, and the sample is broken at the middle point.

When a three-point bending test is carried out, for tests with different span requirements, two roller supports on the auxiliary bending tool need to be manually moved, a spanner is used for fixing after the span size is determined, and span adjustment is troublesome; and the two fixed roller supports are likely to slide outwards along the axial direction of the auxiliary tool in the bending test, so that span variation is caused, and the test result of the mechanical property bending test is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems existing in the background technology, the application provides a double-push adjustable span bending mechanical property test auxiliary tool.

The auxiliary tool for the double-push adjustable span bending mechanical property test comprises a machine body and two groups of supporting assemblies, wherein a distance adjusting assembly used for adjusting the distance between the two groups of supporting assemblies is arranged on the machine body, and the distance adjusting assembly comprises a lead screw and a hand wheel, wherein the lead screw is rotatably connected with the machine body, and the hand wheel is fixedly connected to the end part of the lead screw; the supporting component is in threaded connection with the lead screw and moves synchronously and oppositely or reversely along the lead screw.

By adopting the technical scheme, for mechanical property bending tests with different span requirements, the lead screw can be driven to rotate by rotating the hand wheel, and at the moment, the lead screw is in threaded fit with the roller base and drives the roller base to move, so that the support assemblies are driven to slide on the machine body, the adjustment of adjusting the distance between the two groups of support assemblies is realized, and the device is simple and convenient; and the limiting effect of the lead screw effectively reduces the possibility that the support assembly slides along the axial direction of the machine body, and ensures the test result of the bending test.

Preferably, the machine body is provided with an adjusting groove, and the lower part of the supporting component is slidably arranged in the adjusting groove; the adjustable screw is characterized in that a limiting block is arranged in the adjusting groove, a baffle is fixedly arranged at the end part of the adjusting groove, and the screw penetrates through the lower part of the supporting assembly and is rotatably connected with the limiting block and the baffle.

By adopting the technical scheme, the arranged baffle and the limiting block form stable support for the screw rod, so that the rotation effect of the screw rod is ensured, and the stability during span adjustment is improved; and in the process of bending mechanical property test, the support assembly has downward pressure effect on the screw rod, and the support of the baffle and the limiting block reduces the possibility of the screw rod being pressed and inclined, so that the screw rod is well protected.

Preferably, the limiting block is in clearance fit with the adjusting groove.

Through adopting above-mentioned technical scheme, stopper and adjustment tank clearance fit make the stopper can beat from top to bottom and front and back in the adjustment tank, but can not carry out axial displacement along the lead screw, have improved the stability of roll adjustment subassembly, and are favorable to the dismantlement maintenance in later stage.

Preferably, the supporting assembly comprises a roller base (21) which is arranged on the machine body (1) in a sliding mode, a supporting roller support is detachably mounted at the top end of the roller base, and the top end face of the supporting roller support is a circular convex table face.

By adopting the technical scheme, because the supporting roller support is detachably arranged on the roller base, the supporting roller support of the circular convex table top with different radiuses can be replaced for the performance test required by different radiuses, the auxiliary tool for the test with different radiuses does not need to be purchased, and the equipment cost is effectively reduced.

Preferably, two the relative lateral wall of roller base has all seted up spacing blind hole, the rigid coupling has the seat cover piece with spacing blind hole grafting cooperation on the bearing of bearing.

By adopting the technical scheme, the supporting roller support is installed in the limiting blind holes of the roller bases through the seat sleeve block, the performance test is carried out, the supporting roller support is easy to move outwards under the pressing action of the sample, and the limiting blind holes are formed in the side walls, opposite to the two roller bases, of the two roller bases, so that the supporting roller support is effectively prevented from sliding towards two sides due to the limiting of the limiting blind holes, the stability of the supporting assembly in the test process is improved, and the reliability of the result is improved.

Preferably, a ruler for marking the position of the support component is fixedly arranged on the side wall of the machine body.

Through adopting above-mentioned technical scheme, when adjusting the span, confirm the position of supporting component, convenient and fast correctly according to the scale on the scale.

Preferably, the machine body is arranged on a universal material testing machine, and the universal material testing machine is also provided with an anti-bending pressure head which is vertically arranged right above the center of the machine body.

By adopting the technical scheme, after span adjustment is finished, the sample is horizontally placed on the supporting assembly, so that the bottom surfaces of the two ends of the sample are supported on the circular convex table surface at the top end of the supporting roller support, and the center of the sample is aligned with the center of the machine body; and then the universal material testing machine is adjusted to enable the bending-resistant pressure head to move downwards, so that the bending-resistant pressure head vertically presses the top surface of the center of the sample downwards, three-point bending can be achieved, and the accuracy of the test result is further improved.

Preferably, the bottom of the machine body and the top of the bending-resistant pressure head are respectively and fixedly connected with a lower clamping part and an upper clamping part, and the lower clamping part and the upper clamping part are both rectangular blocks; the universal material testing machine is provided with a lower clamping jaw for clamping the lower clamping part and an upper clamping jaw for clamping the upper clamping part, and the upper clamping jaw and the lower clamping jaw are correspondingly arranged to be flat.

Through adopting above-mentioned technical scheme, go up clamping part and clamping part down and be rectangular block, universal material testing machine is that the upper and lower tong mouth that the plain end set up presss from both sides respectively and presss from both sides clamping part and clamping part down, has ensured that the longitudinal axis of organism is adjusted well with the horizontal axis of testing machine, and the vertical axis of bending resistance pressure head is adjusted well with the vertical axis of testing machine, is favorable to ensureing the effect that the bending resistance pressure head pushed down the sample perpendicularly.

In summary, the present application includes at least one of the following beneficial technical effects:

1. for mechanical property bending tests with different span requirements, if the roller base is driven to move by the lead screw by rotating the hand wheel, the support assemblies are driven to slide on the machine body, the adjustment of the distance between the two groups of support assemblies is realized, and the method is simple and convenient; the limiting function of the lead screw effectively reduces the possibility that the support assembly slides along the axial direction of the machine body, and ensures the test result of the bending test;

2. for performance tests with different bending radius requirements, the supporting roller support of the circular convex table top with different radius can be replaced, test aids with different bending radius do not need to be purchased, and equipment cost is effectively reduced;

3. the limiting effect of spacing blind hole in this application has prevented effectively that a roll support pressurized and to both sides slide, has improved the stability of supporting component in the test process, and then has improved the reliability of result.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram of the machine body in the embodiment of the present application.

Fig. 3 is a schematic structural view of a roller base in an embodiment of the present application.

Fig. 4 is a cross-sectional view taken along line a-a of fig. 3.

Fig. 5 is a schematic structural diagram of a roller support in an embodiment of the present application.

Fig. 6 is a view from direction B of fig. 5.

Fig. 7 is a schematic structural diagram of a distance adjusting assembly in an embodiment of the present application.

Fig. 8 is a schematic structural view of the assembly of the present embodiment with a sample.

Description of reference numerals: 1. a body; 11. an adjustment groove; 12. a scale; 13. a lower clamping portion; 2. a support assembly; 21. a roller base; 211. a limiting blind hole; 212. a threaded hole; 22. a supporting roller support; 221. a seat sleeve block; 222. a circular boss; 3. a distance adjusting component; 31. a lead screw; 32. a baffle plate; 33. a limiting block; 34. a hand wheel; 4. a bending-resistant pressure head; 41. an upper clamping portion; 5. a universal material testing machine; 51. an upper jaw; 52. a lower jaw; 6. and (4) sampling.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses a double-push adjustable span bending mechanical property test assistive device. Referring to fig. 1, the double-push span-adjustable bending mechanical property test assistive device comprises a machine body 1, a supporting assembly 2 and a distance adjusting assembly 3. Referring to fig. 2, an adjusting groove 11 is formed on the top surface of the machine body 1, the length direction of the adjusting groove 11 is the same as the length direction of the machine body 1, and the cross section of the adjusting groove 11 is trapezoidal.

Referring to fig. 1, the support assembly 2 includes a roller base 21 and a roller support 22. Referring to fig. 3, the roller base 21 has a right trapezoid shaped cross section at the upper part and an isosceles trapezoid shaped cross section at the lower part. The upper part of the roller base 21 is supported on the top surface of the machine body 1, and the lower part of the roller base 21 is slidably arranged in the adjusting groove 11 and is attached to the inner wall of the adjusting groove 11. Referring to fig. 4, a limiting blind hole 211 is formed in a side wall of the upper portion of the roller base 21 near the middle of the machine body 1, an opening of the limiting blind hole 211 is trapezoidal, and a top end of the limiting blind hole is communicated with a top surface of the roller base 21.

Referring to fig. 5 and 6, the roller support 22 is a rectangular block, and a seat cover block 221 is integrally formed on the bottom surface thereof. The seat sleeve block 221 is a trapezoidal block and is disposed on one side of the support roller seat 22 close to the middle of the machine body 1. The seat sleeve block 221 is matched with the limit blind hole 211 in an inserting mode, so that the supporting roller support 22 is fixed on the roller base 21, and the supporting roller support 22 is detachably connected with the roller base 21. The top end of the support roller support 22 is integrally formed with a circular boss 222, the cross section of the circular boss 222 is semicircular, and the length direction of the circular boss is consistent with the length direction of the support roller support 22.

Referring to fig. 1, the support members 2 are provided in two sets, and the two sets of support members 2 are symmetrically arranged about a transverse axis of the machine body 1. When the test specimen 6 is placed on the test aid, the bottom surfaces of both ends of the test specimen 6 are supported on the top ends of the two circular bosses 222, respectively. For performance tests with different bending radius requirements, the supporting roller support 22 with the circular boss 222 with different radius can be replaced, and the equipment cost is reduced.

Referring to fig. 1, the distance adjusting assembly 3 includes a screw 31, a baffle 32, a stopper 33, and a hand wheel 34. The screw 31 is rotatably disposed in the adjusting groove 11, and the length direction thereof is identical to the length direction of the machine body 1. The shutter 32 is a rectangular plate that is fixed to an end of the body 1 to shield an end of the adjustment groove 11. Referring to fig. 7, the cross section of the stopper 33 is trapezoidal, and is in clearance fit with the adjustment groove 11. One end of the screw 31 is fixedly connected with the hand wheel 34, the other end of the screw penetrates through the baffle 32, the roller base 21 and the limiting block 33 in sequence, and the screw 31 is rotatably connected with the baffle 32 and the limiting block 33 through bearings. As shown in fig. 4, a screw hole 212 is opened in a lower portion of the roller base 21, and the screw shaft 31 is screwed to the roller base 21 through the screw hole 212. The baffle 32 and the limiting block 33 form stable support for the screw rod 31, when the hand wheel 34 is rotated, the hand wheel 34 drives the screw rod 31 to rotate, at the moment, the screw rod 31 is in threaded fit with the roller base 21, and the roller base 21 is driven to slide on the machine body 1, so that the position of the supporting component 2 is adjusted. The distance adjusting components 3 are provided with two groups, and one group of distance adjusting components 3 are arranged corresponding to one group of supporting components 2.

Referring to fig. 1, a scale 12 is fixedly connected to a side wall of a machine body 1, and a length direction of the scale 12 is identical to a length direction of the machine body 1. For the mechanical performance bending test with different span requirements, the hand wheel 34 is rotated according to the scale of the scale 12, so that the distance between the corresponding support component 2 and the center of the machine body 1 is half of the required span; the other hand wheel 34 is rotated to enable the distance between the other group of supporting components 2 and the center position of the machine body 1 to be half of the required span, so that the distance between the two groups of supporting components 2 is adjusted, and the operation is simple and convenient; and the limiting effect of the screw rod 31 effectively reduces the possibility that the support assembly 2 slides along the axial direction of the machine body 1, and ensures the test result of the bending test.

Referring to fig. 8, the machine body 1 is a rectangular block shape, which is horizontally placed in the universal material testing machine 5. The universal material testing machine 5 is also internally provided with an anti-bending pressure head 4, the cross section of the bottom of the anti-bending pressure head 4 is semicircular, and the diameter of the anti-bending pressure head corresponds to that of the circular boss 222. The bottom of the machine body 1 is fixedly connected with a lower clamping part 13, the top of the bending-resistant pressure head 4 is fixedly connected with an upper clamping part 41, and the upper clamping part 41 and the lower clamping part 13 are both rectangular blocks. An upper clamping jaw 51 and a lower clamping jaw 52 are arranged in the universal material testing machine 5, and both the upper clamping jaw 51 and the lower clamping jaw 52 are arranged to be flat. The lower clamping jaw 52 clamps the lower clamping part 13, so that the machine body 1 can be fixed on the universal material testing machine 5, and the longitudinal axis of the machine body 1 is aligned with the horizontal axis of the testing machine; the upper clamping jaw 51 clamps the upper clamping part 41, so that the bending-resistant indenter 4 can be fixed on the universal material testing machine 5, at the moment, the vertical axis of the bending-resistant indenter 4 is aligned with the vertical axis of the testing machine, so that the bending-resistant indenter 4 is installed right above the center of the machine body 1, and the vertical axis of the bending-resistant indenter 4 is perpendicular to the longitudinal axis of the machine body 1.

The implementation principle of the application is as follows: when the bending-resistant universal material testing machine is used, the machine body 1 is horizontally arranged on a lower clamping opening of the universal material testing machine 5, the supporting roller support 22 of the circular boss 222 with the required size and the corresponding bending-resistant pressure head 4 are selected according to the test requirements, the supporting roller support 22 is arranged on the roller base 21, the bending-resistant pressure head 4 is vertically arranged on an upper clamping opening of the universal material testing machine 5, and the vertical axis of the bending-resistant pressure head 4 is vertical to the longitudinal axis of the machine body 1; then, the hand wheel 34 is rotated, the hand wheel 34 drives the roller base 21 through the screw rod 31 to freely adjust the span until the distance between the two groups of supporting assemblies 2 is the span required by the test; then horizontally placing the sample 6 on the supporting component 2, and enabling the bottom surfaces of the two ends of the sample 6 to be supported on the circular boss 222 surface at the top end of the supporting roller support 22, wherein the center of the sample 6 is aligned with the center of the machine body 1; and then adjusting the universal material testing machine 5 to move the bending-resistant pressure head 4 downwards, and vertically pressing the bending-resistant pressure head 4 downwards on the top surface of the center of the sample 6, so that three-point bending can be generated. The distance between the two groups of supporting components 2 is adjusted through the distance adjusting components 3, so that the device is simple and convenient; the limiting effect of the screw rod 31 effectively reduces the possibility that the support assembly 2 slides along the axial direction of the machine body 1, and ensures the test result of the bending test.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. Double-push adjustable span bending mechanical property test auxiliary tool, which comprises a machine body (1) and two groups of supporting assemblies (2), and is characterized in that: the distance adjusting device is characterized in that a distance adjusting component (3) used for adjusting the distance between two groups of supporting components (2) is arranged on the machine body (1), and the distance adjusting component (3) comprises a lead screw (31) rotatably connected with the machine body (1) and a hand wheel (34) fixedly connected to the end part of the lead screw (31); the bottom of the supporting component (2) is in threaded connection with the lead screw (31) and synchronously moves towards or away from each other along the lead screw (31).

2. The double-push adjustable span bending mechanical property test assistive device according to claim 1, characterized in that: an adjusting groove (11) is formed in the machine body (1), and the lower part of the supporting component (2) is arranged in the adjusting groove (11) in a sliding mode; be provided with stopper (33) in adjustment tank (11), the end fixing of adjustment tank (11) is provided with baffle (32), lead screw (31) run through the lower part of supporting component (2) and all rotate with stopper (33) and baffle (32) and be connected.

3. The double-push adjustable span bending mechanical property test assistive device according to claim 2, characterized in that: the limiting block (33) is in clearance fit with the adjusting groove (11).

4. The double-push adjustable span bending mechanical property test assistive device according to claim 1, characterized in that: the supporting component (2) comprises a roller base (21) which is arranged on the machine body (1) in a sliding mode, a supporting roller support (22) is installed at the top end of the roller base (21) in a detachable mode, and the top end face of the supporting roller support (22) is a circular convex table face.

5. The double-push adjustable span bending mechanical property test assistive device according to claim 4, characterized in that: two spacing blind holes (211) have all been seted up on the relative lateral wall of roller base (21), rigid coupling has seat cover piece (221) with spacing blind hole (211) grafting cooperation on the back-up roll support (22).

6. The double-push adjustable span bending mechanical property test assistive device according to claim 1, characterized in that: and a scale (12) for marking the position of the support component (2) is fixedly arranged on the side wall of the machine body (1).

7. The double-push adjustable span bending mechanical property test assistive device according to claim 1, characterized in that: the machine body (1) is installed on a universal material testing machine (5), an anti-bending pressure head (4) is further installed on the universal material testing machine (5), and the anti-bending pressure head (4) is vertically arranged right above the center of the machine body (1).

8. The double-push adjustable span bending mechanical property test assistive device according to claim 7, characterized in that: a lower clamping part (13) and an upper clamping part (41) are fixedly connected to the bottom of the machine body (1) and the top of the bending-resistant pressure head (4) respectively, and the lower clamping part (13) and the upper clamping part (41) are rectangular blocks; the universal material testing machine (5) is provided with a lower clamping jaw (52) used for clamping the lower clamping part (13) and an upper clamping jaw (51) used for clamping the upper clamping part (41), and the upper clamping jaw (51) and the lower clamping jaw (52) are correspondingly arranged to be flat.