Stretch bending-straightening machine

Abstract

The invention discloses a stretch bending-straightening machine, which is used for continuously straightening a steel strip in the iron industry. The stretch bending-straightening machine consists of an outlet/inlet main drive, a tension device, a hydraulic system and a main body. The main body is additionally provided with a fast open oil cylinder, a support roller, a rotary joint and a limitation stop base, wherein the fast open oil cylinder can be instantaneously and fast opened when a welding gap of the strip steel passes through the main body and can be instantaneously reset to normally work, thereby preventing the surface of a roller and the strip steel from being mutually scrubbed; the support roller changes the installation on a roller box from line contact into face contact, thereby being capable of keeping the precision for long time use and guaranteeing the straightening quality of the strip steel; the rotary joint is in a pretightening type structure which adopts a combined type quill roller thrust bearing with large carrying capability, wherein the rotary joint and a top rod of the stop base are tightly contacted with each other under the function of a spring without impact force caused by axial pulsation when a work roller and a middle roller work, thereby prolonging the service life; and the limitation stop base conveniently changes a single roller on an upper roller box and unscrews screw nails of a lower roller box, so that a plurality of front top rods simultaneously and automatically withdraw from the rotary joint under the function of the spring, thereby being capable of conveniently changing a work roller assembly and a middle roller assembly.

Description

technical field [0001] The invention relates to a stretch bending straightening machine used for continuously straightening strips in the iron and steel industry, which is a series of stretch bending straightening machines in different forms. Background technique [0002] Stretch bending straightening machine belongs to the metallurgical equipment that requires high manufacturing precision and can straighten strips continuously with high efficiency. Defects, improve the surface quality of the strip. At present, the German CLECIM model is mostly used in China, and there are other models. But no matter what type of machine it is, it usually consists of these parts, namely: entrance main drive, exit main drive, entrance tension device, exit tension device, straightener body, hydraulic system, control system, etc. [0003] The quality of the plate shape after being straightened by the leveler is affected by many factors. As far as the leveler itself is concerned, the roll syst...

AI Technical Summary

Problems solved by technology

The existing roll box has the following defects: ① The support surface of the support roll 36 installed on the roll box 39 is a right-angled plane, and the support roll and the roll box are in line contact. After the force is applied, the surface is prone to depressions and indentations. There is a large deviation in the coaxiality of the rolls, which causes the middle roll 37 and the back-up roll 36 to fail to maintain good contact, changes the stress state of the work roll 38, the middle roll 37, and the back-up roll 36 and causes premature failure, and at the same time leads to failure after assembly. The parallelism of intermediate roller 37 is out of tolerance

The loss of the accuracy of the roll box directly affects the quality of the strip straightening; ② limited by the space, the rotary joint 35 uses a miniature bearing, which has a small axial bearing capacity and often burns out, resulting in the work rolls not being able to rotate

Every time it occurs, the surface of the strip will be severely scratched, and it needs to be shut down for treatment; at the same time, the rotary joint is easy to loosen, and it will be broken due to the large axial force and radial force due to the top dead; ③Replace the work roll and intermediate roll, or To replace the swivel joint, it is necessary to unscrew the fixing screw at the bottom of the retaining seat 34 and move the retaining seat backward, which is inconvenient to replace

Especially for the online roll change of the upper roll box, after the overall movement of the stopper, several rolls hanging upside down have no support at the same time, requiring the cooperation of several people to complete the operation, and the replacement time is long, which affects the normal operation of the production line

[0004] In addition to the defects of the above-mentioned roller system, the existing technology of the straightening machine body still has the following problems: the lower roller box cannot be raised and lowered quickly, and the roller box takes a long time to open when the weld seam passes, so that each coil of strip cannot be straightened for tens of meters At the same time, due to the failure of the roll box to be fully opened, the strip and the roll surface will be scratched during this period, and the roll surface scratches will affect the quality of the subsequent board surface

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