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

Method and apparatus for reducing and sizing hot rolled ferrous products

A cross-section, steel technology, applied in the field of reducing the cross-section size of hot-rolled steel products and adjusting its diameter and rolling tools, can solve the problems of not being so effective

Inactive Publication Date: 2003-11-05
PRIMETALS TECH USA
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, three- and four-roll passes are far less effective at adequately penetrating the deformation into the core of the product than two-roll passes

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
  • Method and apparatus for reducing and sizing hot rolled ferrous products
  • Method and apparatus for reducing and sizing hot rolled ferrous products
  • Method and apparatus for reducing and sizing hot rolled ferrous products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Referring to Fig. 1 first, according to the present invention, a rolling process sequence includes P 1 -P 4 Four passes are configured to roll a circular process section 10a to a finished section 10e. Pass P1 is defined by two work rolls 12 having grooves configured to roll a circular process section 10a into an oval section 10b.

[0024] Pass P2 is defined by two work rolls 16 having grooves configured to roll an elliptical section 10b into a circular course section 10c. According to the rolling process adopted, the rolling times P 1 , P 2 It is stipulated that the cross section can be reduced by about 20-55%, among which, in the rolling time P 1 The fracture surface is reduced by about 11-28%, and the rolling times P 2 The fracture surface is reduced by about 10-23%.

[0025] Roll times P 3 Delimited by three work rolls 20 having grooves 22 configured to roll a circular course section 10c into another circular course section 1Od. Roll times P 4 Also defined b...

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

A method of continuously rolling a ferrous workpiece into a finished round, comprising rolling the workpiece in successive first and second roll passes at an elevated temperature of between about 650 to 1000° C., the first and second roll passes each being defined by two work rolls and being dimensioned to effect a combined reduction in the cross sectional area of the workpiece of at least about 20-55%, with an accompanying effective strain pattern dominated by a concentration of maximum effective strain at a central region of the cross sectional area; and while the effective strain pattern remains dominated by a concentration of maximum effective strain at a central region of the cross section, continuing to roll the workpiece in at least third and fourth consecutive roll passes, each of the third and fourth roll passes being defined by at least three rolls and being sized to effect a combined reduction in the cross sectional area of the workpiece of not more than about 4-25 %.

Description

[0001] References to related applications [0002] This application claims priority to US Provisional Patent Application Serial No. 60 / 231,108, filed September 8, 2000, and US Patent Application (serial number unknown) filed August 10, 2001. technical field [0003] The present invention relates to the continuous hot rolling of long steel products including, in particular, steel section products of circular, octagonal, square and similar cross-sectional shapes. Background technique [0004] In the round steel rolling described herein, the term "setting" refers to the final deformation of the workpiece in the final rolling stage to obtain the nominal diameter of the finished product within the diameter tolerance range specified by the standard, typically, the diameter tolerance The difference is about ±0.1mm, and the tolerance of ellipticity is about 0.1mm, or less. Furthermore, in this context, the term "free tuning" means that the adjustment of the distance between the rol...

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
IPC IPC(8): B21B1/16B21B1/08B21B1/18B21B3/00
CPCB21B1/18
Inventor T·M·肖尔P·L·凯泽B·V·基弗
Owner PRIMETALS TECH USA
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