CN112504828A

CN112504828A - Stable mixed loading anchor clamps of centre gripping

Info

Publication number: CN112504828A
Application number: CN202011483997.2A
Authority: CN
Inventors: 许经纬; 谢浩俊; 王松; 陈云
Original assignee: Changzhou Wmc Detection Technology Co ltd
Current assignee: Changzhou Wmc Detection Technology Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-03-16

Abstract

The invention relates to a stable-clamping mixed loading clamp which comprises a clamp body and an auxiliary clamping assembly, wherein the auxiliary clamping assembly is installed in the middle of the clamp body, the clamp body comprises an upper clamp and a lower clamp which are symmetrically arranged, the upper clamp and the lower clamp are identical in structure, the auxiliary clamping assembly is symmetrically arranged between the upper clamp and the lower clamp, the auxiliary clamping assembly comprises a driving part and a clamping part, the output end of the driving part is connected with the clamping part, and the clamping part is abutted to the clamp body. On one hand, the invention improves the precision of the installation position of the sample strip, keeps the mutual overlapping of the central axis of the sample strip and the central axis of the device, effectively overcomes the stress of the sample strip in the horizontal direction in the test and improves the detection precision; on the other hand, the clamping force in a larger range can be provided, the tensile or compression test of the maximum 3000kN test load can be met, and the tensile and compression test can be performed on materials with different thicknesses and higher performance.

Description

Stable mixed loading anchor clamps of centre gripping

Technical Field

The invention relates to the technical field of clamping equipment, in particular to a stable-clamping mixed loading clamp.

Background

The composite material is a material formed by combining two or more different substances in different modes, can exert the advantages of various materials, overcomes the defects of a single material, expands the application range of the material, can be made into a sample strip before use, and can be tested for the performance of the composite material through a tensile test. Tensile test refers to a test method for measuring material properties under an axial tensile load. In the tensile test, a test piece is fixed in a chuck of a testing machine, the testing machine is started to stretch until the test piece is broken, a load-deformation curve is drawn or printed in the test process, and the yield load and the limit load are read or printed by the curve and a pointer.

Due to the fact that the splines are made of different materials in the tensile test, the material with high tensile strength needs larger test load, and the clamping force of the clamp on the splines needs to be correspondingly increased in the test. On the other hand, when the central axis of spline and the central axis of anchor clamps take place to squint in the experimentation, produce horizontal direction's stress easily, lead to the vertical direction's of spline testing result precision to descend, stability when can influence the test that detects the spline moreover easily leads to spline to become invalid unusually.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a hybrid loading clamp with high detection precision.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a stable mixed loading anchor clamps of centre gripping, includes anchor clamps body, supplementary centre gripping subassembly, supplementary centre gripping unit mount is in the middle part of anchor clamps body, the anchor clamps body is including last anchor clamps and lower anchor clamps that the symmetry set up, it is the same with lower anchor clamps structure to go up the anchor clamps, it is provided with supplementary centre gripping subassembly to go up the symmetry between anchor clamps and the lower anchor clamps, supplementary centre gripping subassembly includes drive division and clamping part, the output of drive division with the clamping part is connected, the clamping part with anchor clamps body looks butt.

By adopting the technical scheme, the auxiliary clamping assemblies which are symmetrically arranged can improve the precision of the mounting position of the sample strip on one hand, keep the central axis of the sample strip and the central axis of the device to be mutually overlapped, effectively overcome the stress in the horizontal direction generated by the sample strip in the test process and further improve the detection precision of the sample strip; on the other hand supplementary centre gripping subassembly can also provide the required clamping force of test load of the highest 3000kN, in order to adapt to testing the spline of different sizes, the anchor clamps body can provide the clamping area that has different sizes.

The present invention in a preferred example may be further configured to: the upper clamp comprises a connecting seat, a driving piece and a clamping piece, wherein the driving piece is installed in the middle of the connecting seat, a mounting groove is formed in one side of the connecting seat, one part of the clamping piece is located in the mounting groove, and the other part of the clamping piece is located outside the mounting groove and abutted to the clamping part.

Through adopting above-mentioned technical scheme, under the drive of driving piece, the holder can drive the spline and carry out tensile test, convenient to use, and work efficiency is higher.

The present invention in a preferred example may be further configured to: the inner wall of mounting groove slope sets up, its orientation one side of clamping part dwindles gradually, the holder is located a part of mounting groove is the wedge setting.

Through adopting above-mentioned technical scheme, the cooperation between the mounting groove that the slope set up and the clamping piece of wedge setting can improve the teaching aid body to the stability to the spline centre gripping, conveniently tests.

The present invention in a preferred example may be further configured to: the clamping part is arranged in a U shape, the end part of the clamping part is connected with the clamp body through a connecting shaft which penetrates through the clamping part, and the side surface of the clamping part is connected with the driving part.

Through adopting above-mentioned technical scheme, the clamping part that the U type set up can play the effect of even centre gripping to the holder, keeps the atress of holder both sides more even, and connection stability is higher.

The present invention in a preferred example may be further configured to: the driving portion comprises a hydraulic oil cylinder, fixing plates and guide rods, the fixing plates are arranged on two sides of the hydraulic oil cylinder, the fixing plates are fixedly connected with the outer wall of the clamping portion, the fixing plates located at two ends of the hydraulic oil cylinder are connected through the guide rods, and through holes for the hydraulic oil cylinder to pass through are formed in the clamping portion.

Through adopting above-mentioned technical scheme, under hydraulic cylinder's drive, hydraulic cylinder's output moves along guide bar length direction to adjust the position of holder through the through-hole, realize position control.

The present invention in a preferred example may be further configured to: one side of the clamping part, which is far away from the driving part, is provided with a fine adjustment handle, and the fine adjustment handle penetrates through the clamping part and is connected with the clamp body.

Through adopting above-mentioned technical scheme, the fine setting handle can be after the drive division is to the position control of holder, finely tunes the correction, guarantees that the axis of spline and the axis of device coincide mutually.

The present invention in a preferred example may be further configured to: the drive part is arranged on both sides of the clamping part.

Through adopting above-mentioned technical scheme, the drive division that the symmetry set up has that the synchronism is better, adjusts characteristics such as stability is higher, convenient to use.

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

1. the technical scheme that the auxiliary clamping assemblies are symmetrically arranged between the upper clamp and the lower clamp is adopted, so that the accuracy of the mounting position of the sample strip can be improved, the central axis of the sample strip and the central axis of the device are kept to be overlapped, and the stress in the horizontal direction generated in the test process of the sample strip can be effectively overcome, so that the detection accuracy effect of the sample strip is improved;

2. the technical scheme of the upper clamp consisting of the connecting seat, the driving part and the clamping part is adopted, so that the power of larger load can be improved, the sample strips with different sizes can be detected, the use is convenient, and the working efficiency is higher;

3. the technical scheme of the driving part consisting of the hydraulic oil cylinder, the fixing plate and the guide rod is adopted, so that the position of the clamping piece with the splines clamped inside can be adjusted through the hydraulic oil cylinder.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic overall structure diagram of the first embodiment.

Fig. 2 is a schematic sectional structure of fig. 1.

Fig. 3 is a schematic view of the overall structure of the second embodiment.

The reference numbers in the drawings are:

1. a clamp body; 11. an upper clamp; 111. a connecting seat; 1111. mounting grooves; 112. a drive member; 113. a clamping member; 12. a lower clamp; 2. an auxiliary clamping assembly; 21. a drive section; 211. a hydraulic cylinder; 212. a fixing plate; 213. a guide bar; 22. a clamping portion; 221. a through hole; 3. a connecting shaft; 4. and (5) fine adjustment of a handle.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

referring to fig. 1, the hybrid loading fixture with stable clamping disclosed by the invention comprises a fixture body 1 and auxiliary clamping assemblies 2, wherein the fixture body 1 comprises an upper fixture 11 and a lower fixture 12 which are symmetrically arranged and have the same structure, a plurality of groups of auxiliary clamping assemblies 2 are symmetrically arranged between the upper fixture 11 and the lower fixture 12, and the auxiliary clamping assemblies 2 can improve the connection stability between a spline and the fixture body 1, keep the central axis of the spline and the central axis of the fixture body 1 overlapped with each other in the detection process, improve the stress stability of the spline, effectively relieve the stress in the horizontal direction generated by the spline and improve the precision of the detection result. In this embodiment, the clamping surfaces of the upper clamp 11 and the lower clamp 12 can be adjusted to the clamping area according to the size of a specific detection spline, so that the universality of the device is improved, and the detection of splines with different sizes is facilitated.

Referring to fig. 2, the upper fixture 11 includes a connection seat 111, a driving member 112 and a clamping member 113, a mounting hole is formed at the bottom of the connection seat 111, the upper fixture 11 is conveniently mounted with an external testing device through the mounting hole, a mounting groove 1111 is formed at a side of the connection seat 111 far from the mounting hole, the driving member 112 is mounted in the middle of the mounting groove 1111, in this embodiment, the driving member 112 employs a hydraulic jack as the driving member 112, which has the characteristics of high load, easy control, easy use, etc., in order to further improve the inclined arrangement of the inner wall of the mounting groove 1111 between the driving member 112 and the connection seat 111 toward one side of the auxiliary clamping assembly 2, the included angle of the driving member is smaller as it gets closer to the auxiliary clamping assembly 2, the clamping member 113 employs symmetrically arranged clamping pieces, wherein one part of the clamping pieces is located inside the mounting groove 1111, the other part, the clamping piece that sets up through the wedge can carry the frictional force between 113 and the connecting seat 111 of holder, improves the stability of connecting between the two, avoids in the test process, and both positions take place the drunkenness.

In order to improve the stability of being connected between clamping part 22 and the holder 113, clamping part 22 is the U type setting, its inner wall and the outer wall looks butt of holder 113, both all vertical settings, clamping part 22 is connected with last anchor clamps 11 and lower anchor clamps 12 through the connecting axle 3 of vertical setting, one side of the outer wall of clamping part 22 evenly is provided with a plurality of drive division 21 along its length direction, it is more even to keep a part atress of holder 113 in the mounting groove 1111 outside. Each driving portion 21 comprises a hydraulic oil cylinder 211, fixing plates 212 and guide rods 213, fixing plates 212 are arranged on two sides of each hydraulic oil cylinder 211, one fixing plate 212 is fixedly connected with the outside of the clamping portion 22, a plurality of guide rods 213 are arranged on the two fixing plates 212 in the circumferential direction, the hydraulic oil cylinders 211 are kept in a horizontal state all the time in the displacement process through the guide rods 213, through holes 221 allowing the output ends of the hydraulic oil cylinders 211 to pass through are further formed in the middle of the clamping portion 22, and clamping and fixing of the clamping piece 113 are facilitated.

In order to further improve the stability of being connected between spline and the equipment, still be provided with fine setting handle 4 in one side that drive division 21 was kept away from to clamping part 22, the outer wall that clamping part 22 was passed to fine setting handle 4 is connected with holder 113, through fine setting handle 4, finely tunes holder 113's position to guarantee that the axis of spline and the axis of equipment coincide all the time, improve the precision of testing result.

The specific implementation process of the embodiment is as follows:

when detecting the spline, earlier through the inside interval of adjusting driving piece 112 adjustment holder 113, then put into the inside of holder 113 with the spline is vertical, and drive holder 113 through driving piece 112 and tentatively fix the spline, tentatively fix the back of accomplishing, start hydraulic cylinder 211, under hydraulic cylinder 211's drive, clamping part 22 presss from both sides holder 113 tightly, and carry out the secondary to the spline and fix, fixed the back of accomplishing, rethread fine setting handle 4 finely tunes the position of spline, guarantee that its axis coincides each other with the axis of the device, and in the experimentation, offset the stress of the horizontal direction that the spline produced, thereby improve the stability of being connected between spline and the device and the precision of testing result.

Example two

Referring to fig. 3, the technical features of the present embodiment are different from those of the first embodiment: fine adjustment handle 4 is not installed to this embodiment to install drive division 21 at the bilateral symmetry of clamping part 22, carry out the function through same hydraulic pump between two drive division 21 that are located same water flat line, synchronism between the two is higher, thereby guarantees at the in-process of adjustment, and the coincidence is used with the device's axis to the spline, thereby need not to carry out artifical fine setting, improves work efficiency.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a stable mixed loading anchor clamps of centre gripping, includes anchor clamps body (1), supplementary centre gripping subassembly (2), install supplementary centre gripping subassembly (2) the middle part of anchor clamps body (1), its characterized in that: the clamp comprises a clamp body (1) and is characterized in that the clamp body comprises an upper clamp (11) and a lower clamp (12) which are symmetrically arranged, the upper clamp (11) is identical to the lower clamp (12) in structure, an auxiliary clamping assembly (2) is symmetrically arranged between the upper clamp (11) and the lower clamp (12), the auxiliary clamping assembly (2) comprises a driving portion (21) and a clamping portion (22), the output end of the driving portion (21) is connected with the clamping portion (22), and the clamping portion (22) is abutted to the clamp body (1).

2. The hybrid loading fixture of claim 1, further comprising: go up anchor clamps (11) including connecting seat (111), driving piece (112) and holder (113), driving piece (112) are installed the middle part of connecting seat (111), mounting groove (1111) have been seted up to one side of connecting seat (111), some of holder (113) are located the inside of mounting groove (1111), another part is located mounting groove (1111) outside and with clamping part (22) looks butt.

3. A clamp-stable hybrid loading fixture as claimed in claim 2, wherein: the inner wall of mounting groove (1111) slope setting, it is towards one side of clamping part (22) dwindles gradually, holder (113) are located a part of mounting groove (1111) is the wedge setting.

4. The hybrid loading fixture of claim 1, further comprising: the clamping part (22) is arranged in a U shape, the end part of the clamping part is connected with the clamp body (1) through a connecting shaft (3) which is arranged in a penetrating mode, and the side face of the clamping part (22) is connected with the driving part (21).

5. The hybrid loading fixture of claim 4, further comprising: the driving portion (21) comprises a hydraulic oil cylinder (211), a fixing plate (212) and guide rods (213), the fixing plate (212) is arranged on each of two sides of the hydraulic oil cylinder (211), the fixing plate (212) is fixedly connected with the outer wall of the clamping portion (22), the fixing plates (212) located at two ends of the hydraulic oil cylinder (211) are connected through the guide rods (213), and through holes (221) for the hydraulic oil cylinder (211) to pass through are formed in the clamping portion (22).

6. The hybrid loading fixture of claim 5, further comprising: one side of the clamping part (22) far away from the driving part (21) is provided with a fine adjustment handle (4), and the fine adjustment handle (4) penetrates through the clamping part (22) and is connected with the clamp body (1).

7. The hybrid loading fixture of claim 5, further comprising: the driving parts (21) are arranged on two sides of the clamping part (22).