A test method for compressive properties of large-diameter thin-walled pipes
A test method and technology for thin-walled tubes, which are applied in the application of stable tension/pressure to test the strength of materials and the preparation of test samples, which can solve the problems of large deformation, instability and wrinkling of thin-walled tubes, etc.
Active Publication Date: 2017-07-18
NORTHWESTERN POLYTECHNICAL UNIV
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] In order to obtain the compression performance of large-diameter thin-walled pipes, the present invention proposes a test method suitable for the compression performance of large-diameter thin-walled pipes. This method can not only effectively solve the problems of thin-walled pipes being unstable and wrinkled during compression, Large deformation can be achieved, and compression performance tests at different temperatures can be carried out
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0042] The invention is a method for testing the compressive performance of large-diameter thin-walled pipes. Now take the CP-3 pure titanium tube with a specification of Φ76.2×t1.07mm (outer diameter Φ×wall thickness t) as the object, and use this method to test the compression performance. The specific steps are as follows:
[0043] Step 1. Cut the arc-shaped sheet sample:
[0044] Take a section of the titanium tube to be tested, and cut about 70 arc-shaped sheet samples on the titanium tube by wire cutting method; the selected sample has no obvious gaps, and the inner and outer arc surfaces of the sample and the edges of each edge There are about 60 pieces of samples with high uniformity; according to the principle of determining the size of arc-shaped sheet samples, the axial length is 13mm, and the circumferential length is 11mm;
[0045] Step 2. Grinding the sample:
[0046] Wet the arc-shaped sheet-shaped sample, first use wet 400# coarse sandpaper to polish, and smo...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| radius | aaaaa | aaaaa |
Login to View More
Abstract
The invention belongs to the field of testing the mechanical properties of material forming, and in particular relates to a testing method for the compression properties of large-diameter thin-walled pipes. Through the method of processing the arc-shaped sheet samples cut from the thin-walled pipes into block samples, the problems of instability, wrinkling, small deformation and inability to perform high-temperature compression performance tests that are prone to occur in traditional compression test methods are solved. . First cut the arc-shaped sheet sample from the pipe to be tested; then grind and pickle the sample to obtain a high-quality sheet sample; then use laser welding to preliminarily fix the sheet sample, and design The diffusion welding mold realizes the diffusion welding of the bulk sample; then the post-processing such as grinding and polishing is performed on the sample after diffusion welding to obtain a block sample suitable for the compression performance test of the large-diameter thin-walled pipe; finally, the processing The final compression sample is directly placed on the compression testing machine for compression test, so as to obtain the compression mechanical properties of the large-diameter thin-walled pipe.
Description
[0001] 1. Technical field [0002] The invention belongs to the field of testing the mechanical properties of material forming, in particular to a testing method for the compression properties of large-diameter thin-walled pipes. [0003] 2. Background technology [0004] The development of high-end equipment in aviation, aerospace and other fields urgently requires the development of high-performance, lightweight, high-efficiency key components and their precise forming technology. Large-diameter thin-walled pipe fittings are a kind of key components of "blood vessels" with a large quantity and a wide range. Because they can meet the current high-end equipment manufacturing industry's high-performance, lightweight, high-strength and low-consumption requirements from both aspects of material and structure. Energy requirements, more and more widely used in many major strategic industries such as aviation, aerospace, automobiles and energy. However, this type of pipe often has t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N3/08
Inventor 李恒韩瑞杨合胡晓马俊陶智君
Owner NORTHWESTERN POLYTECHNICAL UNIV