CN206378362U - A kind of rivet sample Erichsen test auxiliary clamp - Google Patents

Abstract

The utility model is related to a kind of rivet sample Erichsen test auxiliary clamp, including U-shaped chuck body and tension block, the bottom of the U-shaped chuck body opens up the longitudinal hole of up/down perforation, and the diameter of longitudinal hole diameter and rivet nail rod matches and less than the diameter of the rivet head of a nail；2 cross through hole that left and right insertion and axis are overlapped are opened up on two U-shaped arms of U-shaped chuck body；The screw of left and right insertion is opened up in the tension block, screw rod realizes the connection of tension block and U-shaped chuck body through 2 cross through hole on the screw and the U-shaped arm of U-shaped chuck body in tension block.The utility model can the upper and lower jaw of assisting tension testing machine realize good clamping to rivet tensile sample, improve the accuracy of rivet stretch test result；The utility model is simple in construction, can make a set of auxiliary clamp according to the rivet of different size, tension test is carried out to plurality of specifications rivet so as to realize.

Description

An Auxiliary Fixture for Rivet Specimen Tensile Performance Test

technical field

The utility model relates to a fixture, in particular to an auxiliary fixture for the tensile performance test of a rivet sample.

Background technique

Metal tensile test is a test method for testing the tensile properties of various metal material tools and components. The commonly used specimen fixtures for tensile tests are only suitable for clamping flat, cylindrical or standard specimens, and for some such as Tensile samples with irregular shapes such as rivets cannot be clamped, and even if they are barely clamped, the accuracy of the tensile test results will be seriously affected, burying a safety hazard for the use of subsequent products.

Utility model content

The technical problem to be solved by the utility model is to provide an auxiliary fixture for the tensile performance test of the rivet sample, which can hold the rivet tensile sample well in the rivet tensile performance test, and improve the accuracy of the tensile test results. Solve the background technical defects.

For solving the problems of the technologies described above, the technical solution of the utility model is:

An auxiliary fixture for the tensile performance test of a rivet sample, comprising a U-shaped fixture body and a stretching block, the bottom of the U-shaped fixture body is provided with a vertical through-hole that penetrates up and down, and the diameter of the longitudinal through-hole matches the diameter of the rivet shaft and smaller than the diameter of the rivet cap; the two U-shaped arms of the U-shaped fixture body are provided with two transverse through holes that pass through from left to right and whose axes coincide; The screw holes on the top and the two transverse through holes on the U-shaped arm of the U-shaped clamp body realize the connection between the stretching block and the U-shaped clamp body.

In the aforementioned auxiliary fixture for tensile performance tests of rivet specimens, the longitudinal through hole is opened in the center of the U-shaped bottom of the U-shaped fixture body; the tensile block is composed of a horizontal rectangular block and a vertical rectangular block. The shape of the formed stretching block is an inverted T shape; the length of the horizontal rectangular block matches the width of the U-shaped opening of the U-shaped fixture body, and the screw holes are opened along the length direction of the horizontal rectangular block; one end of the vertical rectangular block is aligned with the horizontal rectangular block. The bottom surface of the block is fixed, and after fixing, the center line of the vertical direction of the vertical rectangular block passes through the intersection of the length and width of the horizontal rectangular block and coincides with the axis of the longitudinal through hole at the bottom of the U-shaped fixture body.

In the above-mentioned auxiliary fixture for tensile performance test of rivet specimens, the front side or rear side of the U-shaped bottom of the U-shaped fixture body faces the direction of the longitudinal through hole, and there is a rectangular gap that runs through the upper and lower surfaces of the U-shaped bottom. The width of the rectangular gap is equal to The diameters of the longitudinal through holes are the same, the rectangular notch is connected with the longitudinal through hole, and the longitudinal middle section of the width of the rectangular notch coincides with the longitudinal middle section of the width of the U-shaped clamp body.

The usage method of the utility model is: insert the nail bar of the rivet tensile sample to be tested into the longitudinal through hole at the bottom of the U-shaped fixture body from top to bottom, since the diameter of the longitudinal through hole is smaller than the diameter of the rivet cap, the cap can It is stuck in the longitudinal through hole; the lower jaw of the tensile testing machine clamps the rivet rod part exposed from the lower part of the longitudinal through hole, and the upper jaw clamps the upper end of the vertical rectangular block of the tensile block to start pulling. Tensile testing machine is used for tensile performance test; since the vertical centerline of the vertical rectangular block of the tensile block passes through the intersection of the length and width of the horizontal rectangular block and coincides with the axis of the longitudinal through hole at the bottom of the U-shaped fixture body, It can effectively ensure that the tensile force during the tensile process of the rivet sample is always on the axis of the rivet and the longitudinal through hole, and improve the accuracy of the tensile test results; when testing some irregular rivet samples with thicker ends and thinner middle , the rod body of the rivet sample can be loaded into the longitudinal through hole along the rectangular notch.

The beneficial effects of the utility model are:

The utility model can assist the upper and lower jaws of the tensile testing machine to realize good clamping of the rivet tensile sample and improve the accuracy of the rivet tensile test results; the utility model has a simple structure and can be manufactured according to rivets of different specifications A set of auxiliary fixtures, so as to realize the tensile test of rivets of various specifications.

Description of drawings

Fig. 1 is a schematic diagram of installation and use of the utility model;

Fig. 2 is the side view of stretch block;

Fig. 3 is a side view of the U-shaped fixture body;

Fig. 4 is the top view of the U-shaped fixture body in the first embodiment;

Fig. 5 is the top view of U-shaped fixture body in the 2nd embodiment;

The marks in the figure are: U-shaped fixture body 1, longitudinal through hole 2, rivet 3, horizontal through hole 4, screw hole 5, screw rod 6, horizontal rectangular block 7, vertical rectangular block 8, rectangular notch 9, upper jaw 10 , Lower jaw 11.

detailed description

Figures 1 to 4 show that the utility model is a rivet sample tensile performance test auxiliary fixture, including a U-shaped fixture body 1 and a tensile block; Figure 4 shows the U-shaped fixture body 1 in the first embodiment In this embodiment, the bottom of the U-shaped clamp body 1 is provided with a vertical through hole 2 that runs through up and down, and the longitudinal through hole 2 is opened at the center of the U-shaped bottom of the U-shaped clamp body 1; The diameters of the 3 nail rods match and are smaller than the diameter of the rivet 3 nail cap, ensuring that the nail cap of the rivet 3 can be clamped in the longitudinal through hole 2; 2 horizontal through holes 4; the stretching block is fixed by a combination of a horizontal rectangular block 7 and a vertical rectangular block 8, and the shape of the stretching block formed after the combination is an inverted T shape; the length of the horizontal rectangular block 7 is the same as that of the U-shaped fixture body The width of the U-shaped mouth of 1 matches, and the screw hole 5 that runs through is offered along the length direction of horizontal rectangular block 7; One end of vertical rectangular block 8 is fixed with the bottom surface of horizontal rectangular block 7, and vertical rectangular block 8 is vertical after fixing The center line in the vertical direction passes through the intersection of the length and width of the horizontal rectangular block 7 and coincides with the axis of the longitudinal through hole 2 at the bottom of the U-shaped fixture body 1, in order to ensure that the tensile force is on a straight line during the stretching of the sample; 6 Pass through the screw hole 5 on the horizontal rectangular block 7 and the two transverse through holes 4 on the U-shaped arm of the U-shaped clamp body 1 to realize the connection between the stretching block and the U-shaped clamp body 1.

Fig. 5 shows the structure of U-shaped fixture body 1 in the 2nd embodiment of the present utility model, except that the structure of U-shaped fixture body 1 is different from embodiment 1, other parts and structure among embodiment 2 are identical with embodiment 1; In this embodiment 2, except that the U-shaped clamp body 1 has the structure described in Embodiment 1, the front side or the rear side of the U-shaped bottom of the U-shaped clamp body 1 is opened with a through U in the direction of the longitudinal through hole 2. The rectangular notch 9 on the upper and lower surfaces of the U-shaped bottom of the clamp body 1, the width of the rectangular notch 9 is the same as the diameter of the longitudinal through hole 2, the rectangular notch 9 is connected with the longitudinal through hole 2, and the longitudinal middle section of the width of the rectangular notch 9 is the same as the U-shaped The longitudinal mid-sections of the width of the fixture body 1 coincide;

The usage method of the present utility model is: insert the nail rod of the tensile sample of the rivet 3 to be tested from top to bottom into the longitudinal through hole 2 at the bottom of the U-shaped fixture body 1, because the diameter of the longitudinal through hole 2 is smaller than that of the rivet 3 The diameter of the nail cap, so the nail cap can be stuck in the longitudinal through hole 2; the lower jaw 11 of the tensile testing machine clamps the shank part of the rivet 3 exposed from the bottom of the longitudinal through hole 2, and the upper jaw 10 clamps it The upper end of the vertical rectangular block 8 of stretch block can start tensile testing machine and carry out tensile performance test; The intersection point of the center line coincides with the axis of the longitudinal through hole 2 at the bottom of the U-shaped fixture body 1, which can effectively ensure that the tensile force of the rivet 3 during the stretching process of the tensile sample is always on the axis of the rivet 3 and the longitudinal through hole 2, Improve the accuracy of the tensile test results; when testing some irregular rivet samples with thicker ends and thinner middle, the rod body of the rivet sample can be loaded into the longitudinal through hole 2 along the rectangular notch 9 .

Claims (3)

1. An auxiliary fixture for tensile performance test of rivet specimens, characterized in that: it includes a U-shaped fixture body (1) and a stretching block, and the bottom of the U-shaped fixture body (1) is provided with a vertical through-hole extending from top to bottom (2), the diameter of the longitudinal through hole (2) matches the diameter of the shank of the rivet (3) and is smaller than the diameter of the cap of the rivet (3); the two U-shaped arms of the U-shaped fixture body (1) are provided with left and right through Two horizontal through holes (4) with coincident axes; left and right through screw holes (5) are provided on the stretching block, and the screw (6) passes through the screw hole (5) on the stretching block and the U-shaped fixture body The two transverse through holes (4) on the U-shaped arm of (1) realize the connection between the stretching block and the U-shaped clamp body (1). 2. The auxiliary fixture for tensile performance test of rivet specimens according to claim 1, characterized in that: the longitudinal through hole (2) is opened in the center of the U-shaped bottom of the U-shaped fixture body (1); The stretching block is composed of a horizontal rectangular block (7) and a vertical rectangular block (8). The shape of the stretching block formed after the combination is an inverted T shape; the length of the horizontal rectangular block (7) is the same as that of the U-shaped fixture body (1 ), the screw hole (5) is opened along the length direction of the horizontal rectangular block (7); one end of the vertical rectangular block (8) is fixed to the bottom surface of the horizontal rectangular block (7), and the vertical The vertical centerline of the straight rectangular block (8) passes through the intersection of the length and width midlines of the horizontal rectangular block (7) and coincides with the axis of the longitudinal through hole (2) at the bottom of the U-shaped fixture body (1). 3. A rivet sample tensile performance test auxiliary fixture according to claim 1 or 2, characterized in that: the front side or the back side of the U-shaped bottom of the U-shaped fixture body (1) faces the longitudinal through hole The direction of (2) has a rectangular gap (9) that runs through the upper and lower surfaces of the U-shaped bottom of the U-shaped fixture body (1). The width of the rectangular gap (9) is the same as the diameter of the longitudinal through hole (2). The rectangular gap (9) ) and the longitudinal through hole (2), and the longitudinal mid-section of the width of the rectangular notch (9) coincides with the longitudinal mid-section of the width of the U-shaped clamp body (1).