Rolling mill pull rod structure with improved wear resistance

Abstract

The utility model discloses a kind of mill pull rod structures of improving wear resistance, including pull rod body, the threaded section is equipped at the both ends of pull rod body, middle part is equipped with assembly section;The threaded section of the both ends of pull rod body is used for adjusting roll gap;The assembly section of the middle part of pull rod body is used for installing protective sleeve, the protective sleeve is fixedly connected on assembly section, the middle pole position of pull rod most likely to wear is set with replaceable stainless steel protective sleeve, wear main body is transferred from the pull rod body of higher cost to the protective sleeve of lower cost, the service life of pull rod body is significantly prolonged, and cost reduction and efficiency increase are realized;For the old pull rod of wear, without overall scrapping, only need to install the protective sleeve of the utility model after turning finishing to wear position, repair can be realized and re-put into use, spare parts procurement cost and shutdown maintenance loss are greatly saved;Protective sleeve can be replaced alone after wearing, maintenance is simple, and cost is low.

Description

Technical Field

[0001] This utility model relates to the field of steel rolling equipment technology, specifically to a rolling mill tie rod structure that improves wear resistance. Background Technology

[0002] Rolling mills are core equipment in steel and metallurgical enterprises for metal rolling processing. In online bar rolling production lines, the mill tie rod, as a critical load-bearing component, directly affects the roll gap settings of each mill stand and the dimensional accuracy of the final product. Existing tie rods mostly adopt an integral structure, operating for extended periods in harsh environments with high speed, high load, and high dust and cooling water. The smooth section in the middle, being directly exposed and rubbing against bearing supports, iron oxide scale, etc., becomes the area with the most concentrated wear. Current common countermeasures include using higher-strength materials or implementing surface heat treatment, but these methods significantly increase manufacturing costs. Furthermore, once a tie rod fails due to excessive localized wear, it usually requires complete replacement, which is not only costly but also leads to long production line downtime, impacting production efficiency. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a rolling mill tie rod structure with improved wear resistance.

[0004] The technical solution of this utility model to solve the above problems is: a rolling mill tie rod structure with improved wear resistance, including a tie rod body, wherein threaded sections are provided at both ends of the tie rod body and an assembly section is provided in the middle; The threaded sections at both ends of the tie rod body are used to adjust the roller gap; The assembly section in the middle of the tie rod body is used to install a protective sleeve, which is fixedly connected to the assembly section.

[0005] Furthermore, the protective sleeve and the assembly section are fitted with an interference fit and fixed by a welding structure.

[0006] Furthermore, the two ends of the protective sleeve are welded to the pull rod body respectively.

[0007] Furthermore, the protective cover is made of stainless steel.

[0008] This utility model has the following beneficial effects: This invention provides a rolling mill tie rod structure with improved wear resistance. A replaceable stainless steel protective sleeve is installed at the middle polished section of the tie rod, where wear is most likely to occur. This transfers the main wear component from the more expensive tie rod body to the lower-cost protective sleeve, significantly extending the service life of the tie rod body and achieving cost reduction and efficiency improvement. For worn tie rods, there is no need to scrap the entire rod; simply machining and repairing the worn area and installing the protective sleeve described in this invention allows for repair and reuse, greatly saving on spare parts procurement costs and downtime maintenance losses. The protective sleeve can be replaced individually after wear, making maintenance simple and inexpensive. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model; In the picture: 1-protective cover, 2-pull rod body. Detailed Implementation

[0010] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0011] As shown in the figure, a rolling mill tie rod structure with improved wear resistance includes a tie rod body 2, which has threaded sections at both ends and an assembly section in the middle.

[0012] The threaded sections at both ends of the tie rod body 2 are used to adjust the roller gap.

[0013] The assembly section in the middle of the tie rod body 2 is used to install the protective sleeve 1. A section with a reduced diameter can be machined out from the middle of the already worn tie rod body 2. The protective sleeve 1 is fixedly connected to the assembly section. The protective sleeve 1 and the assembly section adopt an interference fit and are fixed by a welding structure, thereby effectively protecting the middle area of ​​the tie rod that is most prone to wear.

[0014] The protective sleeve 1 is welded to the tie rod body 2 at both ends. The welded connection structure surrounds the ends of the protective sleeve 1 circumferentially to achieve reliable fixation and resist movement and wear during operation. By installing a replaceable protective sleeve 1 in the easily worn areas of the tie rod body 2, effective protection of critical parts is achieved, improving the overall reliability of the equipment, extending its service life, and also possessing good economic efficiency and maintainability.

[0015] The protective sleeve 1 is made of stainless steel.

[0016] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A rolling mill tie rod structure for improving wear resistance, characterized in that: Includes a pull rod body (2), wherein the pull rod body (2) has threaded sections at both ends and an assembly section in the middle; The threaded sections at both ends of the tie rod body (2) are used to adjust the roller gap; The assembly section in the middle of the tie rod body (2) is used to install the protective sleeve (1), which is fixedly connected to the assembly section.

2. The mill tie rod structure for improving wear resistance as described in claim 1, characterized in that: The protective sleeve (1) is fitted with an interference fit to the assembly section and is fixed by a welding structure.

3. The mill tie rod structure for improving wear resistance as described in claim 2, characterized in that: The protective sleeve (1) is welded to the pull rod body (2) at both ends.

4. A mill tie rod structure for improving wear resistance as described in any one of claims 1-3, characterized in that: The protective sleeve (1) is made of stainless steel.

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