Manufacturing process of cold-drawing seamless pipe for vehicular wrapped gas bottle
A technology of winding gas cylinders and manufacturing process, which is applied in the field of metallurgy, can solve the problems of difficult straightening of large-diameter thin-walled pipes, and achieve the effects of light weight, excellent performance, and broad market prospects
Inactive Publication Date: 2010-11-24
天津润德中天钢管有限公司
View PDF0 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
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
[0025] The present invention will be described in further detail below in conjunction with specific examples, and the following examples are only descriptive, not limiting, and cannot limit the protection scope of the present invention with this.
[0026] A manufacturing process of cold-drawn seamless steel pipes for wound gas cylinders for vehicles, using hot-rolled raw material pipes with a nominal size of Φ273×8.2 and made of 30CrMo, which are thermally expanded to Φ415×7.5 and then cold-drawn to Φ406×5.9 Finished gauge steel pipe. The specific process steps are:
[0027] 1. Thermal expansion process: hot-rolled raw material tube Φ273×8.2 is thermally expanded to Φ415×7.5.
[0028] (1) Inspect the internal and external surface quality, outer diameter, and wall thickness of the hot-rolled raw material pipe of the specification Φ273×8.2, and select a heat-expanded pipe with a wall thickness deviation of the same section below 1.0mm as the raw material pipe.
[0029] (2) Lub...
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
Login to View More Abstract
The invention relates to a manufacturing process of a cold-drawing seamless pipe for a vehicular wrapped gas bottle, comprising the following steps of: carrying out thermal expansion on a hot rolling raw material pipe with the nominal size of phi 273*8.2 into a thermal expansion raw material pipe with the nominal size of phi 415*7.5, and then carrying out cold drawing to form a finished specification steel pipe with the nominal size of phi 406*5.9. The invention relates to the manufacturing process of the new-specification cold-drawing seamless pipe for the vehicular wrapped gas bottle, a product having the specification of phi 406*5.9 and having the characteristics of large volume weight ratio and light weight of a single gas bottle can be produced by using a thermal expansion and cold drawing method, and the gas bottles internally contains flammable and explosive mediums, has the nominal working pressure up to 20Mpa, is in a moving state with a vehicle, and has reliable safety performance. The product of the invention is firstly and exclusively produced in China, can completely satisfy the technical requirements of users, and has excellent performance and wide market potential.
Description
technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a cold-drawn seamless gas cylinder tube of a new specification with large diameter and thin wall, in particular to a manufacturing process of a cold-drawn seamless steel tube for a wound gas cylinder used in vehicles. Background technique [0002] Compressed natural gas steel liner hoop-wound gas cylinders for automobiles (hereinafter referred to as CNG cylinders) are a new type of gas cylinders developed in recent years to adapt to the development of CNG vehicles. According to national regulations, the safety inspection of CNG gas cylinders must be carried out regularly, so the manufacturing process of cold-drawn seamless steel pipes for manufacturing compressed natural gas steel liner hoop-wound gas cylinders for vehicles is particularly important. [0003] Restricted by production conditions and technical level, it is difficult to roll the wall thickness of steel pipes below ...
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 Applications(China)
IPC IPC(8): B21C37/06B21D39/20B21D37/16B21D37/18B21C1/22C23G1/08C23C8/42
Inventor 毕金宝王俊广张勇刘志才
Owner 天津润德中天钢管有限公司