Variable crown roll shape control systems
First Claim
1. A rolling mill system for flat rolled products comprising a cylindrical roll body formed with at least one constant cross-section closed internal channel spaced uniformly from its working surface extending spirally as a fraction of a turn only around a portion of the cylindrical body surface from end to end thereof and adapted to contain hydraulic fluid under pressure and fluid pressure measuring means connected with that channel, thereby continuously measuring the pressure on the roll of that portion only of the moving flat rolled product immediately opposite that portion only of the channel at the work contact line of the rotating roll.
3 Assignments
0 Petitions
Accused Products
Abstract
A hydraulically inflatable roll for flat rolled products is formed with a constant cross section internal fluid channel spaced uniformly from its working surface and extending spirally from end to end of the roll. The channel is connected through an end of the roll to a source of hydraulic fluid under pressure and also to a pressure transducer which in turn is connected to a display device. A proximity trigger is associated with an end of the roll so as to signal the start and the end of the circumferential travel of the channel past the contact line between roll and work when the roll is rotated, and the pressure exerted on that moving area in that interval is continuously measured and transmitted to the display device. Means are also disclosed for using that signal to control gauge and shape of the rolled product.
24 Citations
9 Claims
- 1. A rolling mill system for flat rolled products comprising a cylindrical roll body formed with at least one constant cross-section closed internal channel spaced uniformly from its working surface extending spirally as a fraction of a turn only around a portion of the cylindrical body surface from end to end thereof and adapted to contain hydraulic fluid under pressure and fluid pressure measuring means connected with that channel, thereby continuously measuring the pressure on the roll of that portion only of the moving flat rolled product immediately opposite that portion only of the channel at the work contact line of the rotating roll.
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3. The combination of 1 including a closed end tube containing the hydraulic fluid positioned in the channel and connected to the pressure measuring means.
Specification