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The Structure of a Short-Stroke Rolling Mill
Release date:
2021-10-08
With the development of the steel industry and rising customer demands for higher steel quality, the requirements for rolling mills are becoming increasingly stringent. Short-stress rolling mills stand out for their high rigidity, superior product precision, lightweight design, and ease of operation—particularly thanks to their innovative "on-line rapid mill changeover" feature, which has positioned them as a leading choice in steel rolling operations, especially in domestic bar and wire rod plants. Short-stress line rolling mills can broadly be categorized into frame-type and non-frame-type designs.
As the steel industry grows and customer demands for steel quality increase, the requirements for rolling mills are becoming ever more stringent. Short-stress rolling mill Featuring high rigidity, superior product precision, lightweight equipment, and easy operation, this machine stands out particularly with its "rapid online roll replacement," making it a leading choice for steel rolling operations—especially in domestic bar and wire rod mills. Short-stress-line rolling mills are broadly categorized into frame-type and non-frame types.
Short-stress rolling mill The structure:
The clamping mechanism primarily uses a worm wheel, worm gear, and gears to drive the tie rod in rotation, enabling synchronized vertical adjustment of the roll gap. Both the operator side and the drive side can be adjusted simultaneously, while the connecting shaft allows for single-side adjustments as well. Thanks to the coordinated operation of mechanical, hydraulic, and electrical systems, the entire clamping mechanism can be remotely controlled to fine-tune the roll gap.
Box body: Short-stress rolling mill It can be divided into two parts: the drive side and the fixed side. Each section consists of an upper and a lower frame. Together, the four housings support the radial and axial forces transmitted from the mill bearings—and these forces are then transferred to the tie rods, creating a stress ring. The mill base and tie rods serve as the primary working components of the rolling mill. On the drive side, the housing acts as a free end, bearing only radial forces. In contrast, the operating-side housing not only houses four-row bearings that handle radial loads but also incorporates thrust bearings to manage axial forces. Additionally, the upper housing on the operating side is equipped with a worm-gear mechanism, allowing for axial adjustment—typically up to 3 mm—while the lower roll remains fixed and cannot be adjusted axially. Inside the housings, the four-row cylindrical roller bearings primarily bear the radial loads.
A common type of failure in this area is the burning out of roller bearings. There are several reasons why bearings fail, such as improper installation methods, excessive load capacity, insufficient lubrication, seal failure, manufacturing errors in replacement parts, significant "bounce" in the mill body leading to excessive impact forces during roll engagement, dimensional inaccuracies in the roll neck that cause cracking of the inner sleeve or the formation of "ring gaps," and bearing performance that doesn’t meet operational requirements.
Rod and Housing Assembly: The tie rod and copper nut are the main working components of the rolling mill. The condition of this part of the equipment directly affects product quality and the control of the production process. The copper nut installed on the rolling mill's tie rod rotates to drive the symmetrical movement of the upper and lower housings, achieving symmetrical adjustment of the rolling gap. The advantage of this adjustment method is stable rolling alignment, which can prevent rolling and quality accidents caused by misalignment between the rolling line and the die centerline, greatly reducing dependence on the technical level of the rolling adjuster and simplifying the rolling process. This achieves the goal of reducing rolling accidents and improving product accuracy.
Conclusion: Briefly introduced Short-stress rolling mill Composition and common issues. The level of control that mill pre-installation and maintenance personnel have over these three issues will directly impact the rolling line’s production process and product quality. Therefore, in this regard, the critical task of mill pre-installation and maintenance staff is to effectively leverage their expertise. Short-stress rolling mill Performance improvements to address defects in the rolling mill.
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The Structure of a Short-Stroke Rolling Mill
With the development of the steel industry and rising customer demands for higher steel quality, the requirements for rolling mills are becoming increasingly stringent. Short-stress rolling mills stand out for their high rigidity, superior product precision, lightweight design, and ease of operation—particularly thanks to their innovative "on-line rapid mill changeover" feature, which has positioned them as a leading choice in steel rolling operations, especially in domestic bar and wire rod plants. Short-stress line rolling mills can broadly be categorized into frame-type and non-frame-type designs.
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Summary of the causes of heat generation in various parts of the steel rolling mill production line!
On the steel rolling mill production line, many equipment units—such as flying shears, pinch rolls, and low-voltage compensators—have adopted asynchronous variable-frequency drive systems for their transmission mechanisms. Once the magnetic field reaches saturation, the iron core becomes saturated, causing the no-load current to rise and, consequently, increasing the motor's heat generation. As a result, during summer months, companies often have to halt production for several hours each day just to allow the motors to cool down. This significantly disrupts the rolling mill’s output and inadvertently leads to substantial production cost losses. When the rolling mill processes steel, the motor speed naturally decreases, causing the stator current to surge by 10–22% above its rated value. Frequent overloading not only intensifies motor heating and overheating but can also, in some cases, lead to excessive resistance torque—potentially even stalling or burning out the motor altogether.
2021-09-01
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