Talk:Rolling (metalworking)

Proposed merge from cold rolling and hot rolling
I propose that hot rolling and cold rolling be merged into this article. The techniques used are very similar and it redundant to post in three locations. The major aspects of hot working and cold working can handled by templates to their respective articles. The fine details of the hot/cold working can still be discussed here in their subsection. --Wizard191 (talk) 00:38, 29 October 2008 (UTC)

I propose that Rolling (metalworking) serve as the main article giving a short introductory type description of various areas of rolling. From here, we could have links to specific areas of rolling, e.g. hot rolling, cold rolling, thin strip rolling, foil rolling, temper rolling, equipment (e.g. work rolls) etc.Kivima1 (talk) 15:33, 9 November 2008 (UTC)

Animation on page
The animated gif on this page is outrageously large (10.43MB). can anyone out there size it down? —Preceding unsigned comment added by 70.97.38.226 (talk) 20:16, 15 September 2009 (UTC) Sorry, I actually added an extra gif which I think adds to the understanding of backup roll our-of-roundness correction.AutoElectEngr (talk) 21:02, 17 November 2021 (UTC) I have uploaded a compressed version of the gif. It is 4.4 MB and is called Rolling compressed.gif and is in Tandem Rolling Mills category. AutoElectEngr (talk) 03:19, 4 February 2022 (UTC)

Foundries
I have removed a reference to foundries as having rolling mills. A foundry is a works providing cast iron goods, and they are not rolled. If a works with a rolling mill is known as a foundry, then the word is being used loosely that is to say it is being misued. Peterkingiron 22:25, 5 May 2006 (UTC)

Expansion needed
I have expanded this article to deal with the historical uses of rolling mills in the iron industry. It would be useful if it could be expanded to refer to their use for copper and lead, and also in wire production, not to mention present day uses. This ought however to remain a comparatively brief article, the detail being provided in more detailed articles to which it should lead. Peterkingiron 22:52, 5 May 2006 (UTC)

Recent expansion
This article has recently undergone a major expansion by a relatively new user. I have today sought to do no more than tidy up his (or her) work. The present article relies heavily on a single author. I am afraid that his information on certain historical is not correct. I have tagged a statement about Swalwell and Winlaton as dubious. In fact it is antedates events by almost a decade. I will work to improve this as I have time. Peterkingiron (talk) 17:30, 13 December 2009 (UTC)
 * I have begun correcting what I objected to (above), but the first thing is to get the text right: referencing it proprly can follow.
 * I have removed the reference to Winlaton and Swalwell, which date from the 1690s (not 1682) and were merely the first slitting mills in the northeast of England, not the first anywhere.
 * I have eliminated the reference to Payne's patent of 1728, which presents various strange (and probably impracticable) ideas. I have found nothing to indicate his ideas were implemented.
 * I am uncertain as to Blockley.
 * I suspect that the 3-high mill was not new in 1853: I think I have seen a patent of this of the 1780s. Peterkingiron (talk) 23:15, 13 December 2009 (UTC)

beside thease think colled rolling is a also a process of good surface finish. and final thichness controll process which is impossible in hot rolling process. —Preceding unsigned comment added by 115.244.4.80 (talk) 18:07, 29 April 2011 (UTC) quality and production two different thing in cold rolling.practicly.if we insure for quality we must be lack on production, becouse a lot of problems are generats when we start rolling,varrius parameters condition make its tipical.but by good sense of humure knowldge and experiance we can do much more effectivily. shashank singh 8010894985.engineer at cold rolling mill. —Preceding unsigned comment added by 115.244.4.80 (talk) 18:23, 29 April 2011 (UTC)

Pressure
What sort of pressure (in GPa or MPa) does the metal experience in rolling processes? Mathwhiz90601 (talk) 21:24, 9 October 2010 (UTC)

History
The crediting of Leonardo da Vinci (for the invention of rolling mills) is dubious, since he is infamous for having published nothing (and hence having no impact on the course of history). The reference is a dead-link also. Although apparently not by industrial historians, here are some more sources to use:


 * Some of the earliest known rolling of metals was somewhere around the fourteenth century where very small rolls were used to flatten cold metals such as gold, silver, or lead that were used in jewelry or works of art. In 1480 Leonardo da Vinci describes in his notes machines for the cold rolling of sheets and bars, but it is unlikely that these mills were ever constructed. Toward the last half of the sixteenth century the cold rolling of metal, particularly lead, began to take on more importance as lead began to be used for roofing and other applications such as organ pipes. The seventeenth century saw the hot rolling of bars of ferrous materials into sheets throughout Europe .. These mills were single stand mills. .. the first recorded use of [successive stands arranged in a tandem mill] was for the hot rolling of wire rods in England in 1766, and in 1798 a patent was issued for a tandem mill for rolling iron plates and sheets. John Pittner & Marwan A. Simaan, Tandem Cold Metal Rolling Mill Control: Using Practical Advanced Methods


 * there is no evidence that [Leonardo's sketches] were actually built. ... Not a single mention to rolling appears in De Re Metallica, first published by Agricola in 1556, although the reference of hammering to produce flat plates and strips is made, and this may be indicative of the novelty of this process. Rolling became more common around mid- and late 16th century .. to produce gold and silver strips .. used for coining and minting. The need for .. nails and bolts, during the Industrial Revolution provided for the development of slitting mills, in which a piece of flat-hammered iron passed between a pair of rotating disc cutters. It was normal practice to feed the strip by means of rotating rolls ... The energy required to rotate the rolls and deform the metal .. promoted the installation of rolling mills in sites formerly occupied by wheat mills (therefore the name used up to now) to take advantage of the water wheels Rafael Colas, Design of Microstructures and Properties of Steel by Hot and Cold Rolling, Handbook of Metallurgical Process Design (ed. Totten et al)

Cesiumfrog (talk) 23:22, 3 January 2014 (UTC)