CN220289206U

CN220289206U - Metal 3D prints rectangle tensile sample centre gripping mould and tensile testing machine

Info

Publication number: CN220289206U
Application number: CN202320961586.2U
Authority: CN
Inventors: 陈诚; 王鑫林; 张一朋; 刘畅; 苏艳红; 王鹏东
Original assignee: Chengdu Aeronautic Polytechnic
Current assignee: Chengdu Aeronautic Polytechnic
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2024-01-02
Anticipated expiration: 2033-04-25

Abstract

The utility model discloses a metal 3D printing rectangular tensile sample clamping die and a tensile testing machine, comprising a fixed end and a clamping end which are connected with each other, wherein a clamping groove is formed in the side wall of the clamping end; the notch of the clamping groove extends to the end face of the free end of the clamping end; and a limiting structure is arranged on the side wall of the clamping groove. The small tensile test sample detection device can realize small tensile test sample detection, and is rapid and convenient to install.

Description

Metal 3D prints rectangle tensile sample centre gripping mould and tensile testing machine

Technical Field

The utility model relates to the field of tensile testing machines, in particular to a metal 3D printing rectangular tensile sample clamping die and a tensile testing machine.

Background

The metal 3D printing technology is used as one of the current intelligent material increasing and decreasing technology, is widely applied in the industrial field, and has great advantages in the field of processing parts with complex structures. As with parts manufactured by conventional techniques, parts manufactured by 3D printing techniques also require mechanical property detection to ensure that the performance of the printed parts meets industry requirements. The yield strength and the tensile strength are used as important mechanical property indexes of the metal material, and are strictly controlled in factory requirements. In the traditional manufacturing field, a test piece is required to be machined firstly for testing the tensile strength of a material, then detection is carried out, and the tensile test piece can be printed out together when parts are prepared by a 3D printing technology, so that the material and the time cost are saved.

The tensile test sample can be classified into a circular test sample and a rectangular test sample, and can be detected by a tensile test as long as the dimensional proportion requirement of national standard GB/T228.1-2010 is satisfied. The ability to perform inspection with minimal cost is a pursuit of industrial production, which is an advantage of 3D printing, and strength inspection can be performed by printing rectangular specimens of small size.

The clamping head of the existing tensile tester is matched with the clamping module for the partial cylindrical and rectangular tensile samples, but the module is only suitable for larger samples, and the clamping is inconvenient when the samples are smaller, so that the relative sliding between the clamping device and the workpiece in the tensile process can be caused, and the stress-strain curve graph and the final test value are affected.

Disclosure of Invention

The utility model aims to overcome the defect that a small tensile sample is inconvenient to clamp in the prior art, and provides a metal 3D printing rectangular tensile sample clamping die and a tensile testing machine.

The aim of the utility model is achieved by the following technical scheme:

the utility model discloses a metal 3D printing rectangular tensile sample clamping die which comprises a fixed end and a clamping end which are connected with each other, wherein a clamping groove is formed in the side wall of the clamping end; the notch of the clamping groove extends to the end face of the free end of the clamping end;

and a limiting structure is arranged on the side wall of the clamping groove.

In one possible design, the clamping groove is square.

In one possible design, the limiting structures are two, and are respectively arranged at two sides of the free end of the clamping end.

In one possible design, the limit structure is arcuate.

In one possible design, the fixed end is a screw structure.

The tensile testing machine comprises a testing machine body, an upper chuck and a lower chuck which are connected to the testing machine body, wherein the upper chuck and the lower chuck are respectively fixed with the rectangular metal 3D printing tensile sample clamping die in the first aspect and any possibility thereof.

In one possible design, the upper and lower collets are sleeve structures with internal threads.

The structure of the utility model has at least the following advantages:

by adopting the clamping die of the scheme, the detection of a small tensile sample can be realized, and the installation is rapid and convenient.

Drawings

FIG. 1 is a schematic view of a clamping mold according to the present utility model;

FIG. 2 is a partial schematic view of a clamping die of the present utility model;

FIG. 3 is a schematic view of the installation of a clamping die with a tensile specimen.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model aims at a small rectangular tensile sample, ensures that the clamp and the workpiece do not slide relatively through structural design, has smaller overall size, and can be suitable for tensile testing machines of various types. As shown in fig. 1 and 2, a first aspect of the present utility model provides a metal 3D printing rectangular tensile specimen clamping mold, which includes a fixed end 1 and a clamping end 2 connected to each other. One end of the clamping end is connected with the fixed end, and the end is the fixed end; the other end is the free end 21.

A clamping groove 3 is arranged on the side wall of the clamping end; the notch of the clamping groove extends to the end face of the free end of the clamping end, so that one end of the small tensile sample can be clamped into the clamping groove and extend out of the clamping groove from the end face of the free end. Be provided with limit structure 4 on the centre gripping groove lateral wall to it is spacing to small-size tensile sample one end, avoid deviating from the centre gripping groove in the tensile process.

In order to improve the adaptation degree of the clamping groove and the small rectangular tensile sample, the clamping groove is square.

In order to improve stability of the small rectangular tensile sample during tensile test and improve test precision, two limiting structures are arranged on two sides of the free end of the clamping end respectively.

In order to improve the adaptation degree of the limiting structure and the small rectangular tensile sample 5 and improve the testing precision, the limiting structure is arc-shaped.

In order to facilitate the fixation of the fixed end, the fixed end is of a screw structure.

As shown in fig. 3, the second aspect of the present utility model provides a tensile testing machine, which includes a testing machine body, an upper chuck and a lower chuck connected to the testing machine body, where the testing machine body is in the prior art, and the specific structure of the testing machine body is not described in detail in this scheme. The upper chuck and the lower chuck are respectively fixed with the metal 3D printing rectangular tensile sample clamping die in any one of the first aspect. In order to facilitate the fixing of the clamping die, the upper chuck and the lower chuck are sleeve structures with internal threads.

During tensile test, selecting corresponding clamping dies according to a tensile sample, respectively fixing the two clamping dies on an upper chuck and a lower chuck, wherein the clamping end 2 of one clamping die faces upwards, the clamping end 2 of the other clamping die faces downwards, controlling the upper clamping die to move downwards to a proper position by a main body of the testing machine, and respectively installing two ends of a sheet-shaped sample piece into clamping grooves of the clamping dies, as shown in figure 3; the stretch test of the sheet-like stretch test specimen may then begin.

The clamping die has wide application range and can be used for various types of tensile testing machines; the clamping die is convenient to install and disassemble; the clamping die and the rectangular tensile sample are firmly fixed and cannot slide; the method is suitable for detecting the small-size 3D printing rectangular tensile sample.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The metal 3D printing rectangular tensile sample clamping die is characterized by comprising a fixed end and a clamping end which are connected with each other, wherein a clamping groove is formed in the side wall of the clamping end; the notch of the clamping groove extends to the end face of the free end of the clamping end;

a limiting structure is arranged on the side wall of the clamping groove;

the limiting structure is arc-shaped;

the fixed end is of a screw structure.

2. The metal 3D printed rectangular tensile specimen holding die as defined in claim 1, wherein: the clamping groove is square.

3. The metal 3D printed rectangular tensile specimen holding die as defined in claim 1, wherein: the limiting structures are two and are respectively arranged on two sides of the free end of the clamping end.

4. The tensile testing machine comprises a testing machine body, an upper chuck and a lower chuck which are connected to the testing machine body, and is characterized in that: the upper chuck and the lower chuck are respectively fixed with a metal 3D printing rectangular tensile sample clamping die as claimed in any one of claims 1 to 3.

5. The tensile testing machine of claim 4, wherein: the upper chuck and the lower chuck are sleeve structures with internal threads.