Prestress pull rod of three-high mill
By improving the prestressed tie rod structure of the three-roll mill, the problem of unstable roll ring locking was solved, achieving stable clamping of the roll ring and efficient production, and reducing the failure rate and production cost.
Patent Information
- Application Number
- CN202423239352.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In the steelmaking rolling process, the inability of the roll rings to lock properly in a three-roll mill leads to unstable finished product dimensions, out-of-tolerance dimensions, and roll shaft falling off. These issues are difficult to resolve, result in long downtime, affect product quality and output, and increase processing costs.
A prestressed tie rod for a three-roll mill is designed, comprising a locking section, a first necking section, an intermediate section, a second necking section, and a fixed section. By changing the structure of the prestressed tie rod, the locking force is enhanced, breakage is prevented, and the efficiency of adjustment operations is improved.
It achieves stable clamping of the roller ring, avoids tie rod breakage, improves product quality and online operation rate, reduces spare parts consumption, extends service life, and reduces production costs.
Smart Images
Figure CN223761742U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of three-roll mill technology, and in particular to a prestressed tie rod for a three-roll mill. Background Technology
[0002] During steelmaking and rolling, the roll rings of three-roll mills often fail to lock properly. This results in unstable finished product dimensions, out-of-tolerance dimensions, and roll shafts falling off. These issues are difficult to resolve, cause excessive downtime, and seriously affect product quality and output, while also increasing processing costs. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a prestressed tie rod for a three-roll mill, which changes the original prestressed tie rod to make the locking force more stable, avoids online breakage failures, reduces the online failure rate, makes adjustment more convenient, and improves the efficiency of adjustment operations.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a prestressed tie rod for a three-roll mill, comprising a tie rod body, the tie rod body comprising a locking section, a first necking section, an intermediate section, a second necking section, and a fixing section, wherein the locking section, the first necking section, the intermediate section, the second necking section, and the fixing section are sequentially connected, the length of the first necking section and the second necking section is 28.5 mm, the distance of the first necking section from the locking nut of the three-roll mill is 85 mm, the thread length of the locking section is 58 mm, and the bottom of the thread is arc-shaped.
[0005] Preferably, the tensile strength of the tie rod can reach Rm≥1300MPa→Rp 0.2 ≥1100MPa.
[0006] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0007] 1. Strengthen the contraction force of the tie rod to stabilize the clamping of the roller ring and enhance the stability of online use;
[0008] 2. Prevent tie rod breakage and improve product quality;
[0009] 3. Improve online operation rate and eliminate online failures;
[0010] 4. Reduce spare parts consumption and extend the service life of the tie rod by 3 months, thereby reducing costs and increasing efficiency. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of the pull rod of this utility model.
[0012] Legend:
[0013] Locking section 1, first necking section 2, middle section 3, second necking section 4, fixing section 5. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] Please see Figure 1 This utility model provides a technical solution: a prestressed tie rod for a three-roll mill, comprising a tie rod body, the tie rod body including a locking section 1, a first necking section 2, an intermediate section 3, a second necking section 4, and a fixing section 5. The locking section 1, the first necking section 2, the intermediate section 3, the second necking section 4, and the fixing section 5 are sequentially connected. The lengths of the first necking section 2 and the second necking section 4 are 28.5 mm. The distance from the first necking section 2 to the locking nut of the three-roll mill is 85 mm. The thread length of the locking section 1 is 58 mm, and the bottom of the thread is arc-shaped. The tensile strength of the tie rod can reach Rm≥1300MPa→Rp0.2≥1100MPa.
[0016] One end of the prestressed tie rod is fastened to the fixed end of the rotating roller ring, and the other end of the prestressed tie rod is fastened to the roller shaft and roller ring using a nut. The prestressed tie rod is stretched using a special hydraulic puller, and then the locking nut is locked. The roller ring is completely locked by the contraction force of the prestressed tie rod. The tensile test of this tie rod can reach Rm≥1300MPa→Rp0.2≥1100MPa, avoiding breakage and pressure leakage, reducing the online failure rate, thereby improving the stability of product quality, increasing production efficiency, and reducing production costs.
[0017] 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 three-high rolling mill prestressed tie rod comprising a tie rod body, characterized in that: The pull rod body comprises a locking section, a first necking section, an intermediate section, a second necking section and a fixing section, which are sequentially and sequentially connected, the length of the first and second necking sections is 28.5 mm, the length of the first necking section from the three-roller mill locking nut is 85 mm, the length of the thread of the locking section is 58 mm, and the bottom of the thread is arc-shaped.
2. The three-high rolling mill prestressed tie rod of claim 1, wherein: The tensile strength of the pull rod can reach Rm≥1300 MPa→Rp 0.2 ≥1100 MPa.