Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Austenitic stainless steel D-type thin-wall pipe forming process

A technology for austenitic stainless steel and thin-walled pipes, which is applied in manufacturing tools, metal processing equipment, metal wire drawing, etc., and can solve problems such as difficulty in improving production efficiency, uneven tensile stress, and large tensile anisotropy. Achieve the effects of improving production efficiency, reducing the number of stretching times, and high surface quality

Pending Publication Date: 2022-02-15
广州众山精密科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The shape of the existing stylus pen cover is at most D-shaped. In the prior art, the straight-drawing process is mostly used for the production of D-shaped pipes, and the following problems exist in the actual production process: 1. The straight-drawing forming cannot be stretched continuously and requires Multiple passes through the mold, and the equipment occupies a large area, making it difficult to improve production efficiency; 2. Straight-drawing molding requires multiple passes of D-shaped stretching, and the stretching anisotropy is large in the transition zone between the D-shaped arc surface and the plane, and the stretching is affected. Uneven force, easy to crack

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Austenitic stainless steel D-type thin-wall pipe forming process
  • Austenitic stainless steel D-type thin-wall pipe forming process
  • Austenitic stainless steel D-type thin-wall pipe forming process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The present embodiment prepares a kind of lubricant, and specific implementation process is as follows:

[0025] Step 1: Weigh commercially available graphite and dry it to constant weight, fully grind it in a dry ball mill, sieve the grinding material through a 300-mesh sieve, and take the sieved powder to obtain graphite powder;

[0026] Step 2: Measure 1L of finished drawing oil, 50g of graphite powder prepared in Step 1 and 150mL of sodium petroleum sulfonate into a high-speed shearing machine, stir fully at a speed of 1500r / min for 15min to obtain a viscous mixed oil, and then reduce Rotate at 180r / min, add liquid wax to the mixed oil until the adjusted viscosity is 13±2mm at 60°C 2 / s, made into a lubricant.

[0027] In the example:

[0028] Drawing oil selection drawing oil C63-1;

[0029] Liquid wax selects 300# liquid wax for use.

Embodiment 2

[0031] In this example, a D-shaped thin-walled pipe is stretched and formed, and 316L austenitic stainless steel is selected. Please refer to figure 1 As shown, the specific implementation process is as follows:

[0032] Process S1, intermediate pipe stretching:

[0033] 1) Select a coil of 316L austenitic stainless steel circular welded coil, and its nominal size is φ9.1*0.3;

[0034] 2) Use the unwinding machine to unwind the coiled pipe. The pipe passes through the online heating equipment, and the pipe is subjected to solution heat treatment. The heat treatment temperature is set at 1070°C, and the heat treatment speed is 4m / min. Apply the sponge soaked with the lubricant prepared in Example 1, apply the lubricant evenly on the surface of the pipe, and then stretch the pipe through a drawing die to reduce the diameter and thickness of the pipe. The size of the pipe after stretching is φ8.3*0.265, get a stretched tube;

[0035] 3) In the same way as in process 2), perfor...

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

No PUM Login to View More

Abstract

The invention relates to an austenitic stainless steel D-type thin-wall pipe forming process, and belongs to the technical field of special-shaped pipe forming. According to the process, disc drawing and straight drawing are combined, and welded coil pipes are firstly subjected to multi-pass drawing, diameter reduction and thinning, so that the welded coil pipes have high size consistency; then the pipes are pre-drawn into D-type by referring to a disc drawing method, but the pipes still meet coiling requirements; and finally, straightening and cutting are conducted, and a core head is used for assisting in drawing. Compared with an existing straight drawing process, one-pass drawing is added, the number of times of D-type drawing is reduced, a surface of a finished product has matte metallic luster, no visible cracks exist, the surface quality is high, wall thickness of the finished product is uniform, characteristics of the disc drawing and the straight drawing are reasonably utilized, a comprehensive output rate of the finished product is 12.71 m / min, and the production efficiency is doubled compared with the existing straight drawing process.

Description

technical field [0001] The invention belongs to the technical field of forming special-shaped pipes, and in particular relates to a forming process for austenitic stainless steel D-shaped thin-walled pipes. Background technique [0002] Austenitic stainless steel has high toughness and plasticity, excellent corrosion resistance, good cold workability and welding performance, and is widely used in nuclear power facilities, pressure vessels, food industry, and electronic product parts; the stylus is a touch screen The supporting parts of the stylus are mostly special-shaped structures, and austenitic stainless steel has good toughness and plasticity, which makes it the preferred material for the stylus. [0003] The shape of the existing stylus pen cover is at most D-shaped. In the prior art, the straight-drawing process is mostly used for the production of D-shaped pipes, and the following problems exist in the actual production process: 1. The straight-drawing forming cannot...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/22B21C9/02B21C19/00
CPCB21C1/22B21C9/02B21C19/00
Inventor 薛松王桥
Owner 广州众山精密科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com