Square U-Bolt | Custom U-Bolts from China

A square U-bolt is a U-shaped fastener with 90-degree bends, designed specifically for securely clamping square or rectangular components such as metal beams, framing, and tubing in various industrial, automotive, and agricultural applications.

Kunshan Signum Machinery Technology Co.,Ltd offers and customizes square U-bolts according to customers' requirements or drawing with competitive price. The surface finish can be zinc-plated, hot-dip galvanized, or electro-galvanized for corrosion resistance.

Raw Materials of Square U-Bolt

Square U-bolts are manufactured in a variety of materials and finishes to suit different environmental and load requirements.

Carbon Steel: Common for general-purpose use, offering a balance of high hardness and tensile strength.
Grade 5 Steel: A high-strength material suitable for medium to heavy-duty applications and demanding field conditions.
304/316 Stainless Steel: Offers excellent resistance to rust, moisture, and corrosion, making it a top choice for marine and harsh weather environments.

Manufacturing Process of Square U-Bolt

Material Selection

The manufacturing process of U-bolts begins with the careful selection of suitable materials. High-quality materials, such as a235,35#,45#.40CR, are commonly used due to their strength, durability, and resistance to corrosion. The specific material chosen depends on the intended application and environmental conditions in which the U-bolts will be used.

Wire Drawing

1. Wire Drawing: The manufacturing process typically begins with wire drawing. The steel wire is drawn through a series of dies, reducing its diameter to the desired size. This process improves the tensile strength and surface finish of the wire, thus ensuring optimal performance of the final U-bolt.

2. Cutting: After the metal wire is drawn to the desired diameter, it is cut into single segments of appropriate length. Precise cutting methods such as shearing or sawing are used to ensure dimensional accuracy and consistency.

Bending and Shaping

3. Bending: The cut metal wire is then bent into U-bolts using specialized bending machines. These machines are capable of precisely bending the wire into the desired U-shape, with two arms or legs extending from the bend. The dimensions and angles of the U-bolts are strictly monitored to ensure they meet the required specifications.

4. Trim and Deburr: After the U-bolts are bent and shaped, they need to undergo trimming and deburring processes. The trimming process removes excess material, ensuring smooth edges and accurate dimensions. The deburring process smooths rough edges and removes sharp burrs, ensuring the safety of the U-bolts during handling and installation.

Heat Treatment and Forming

5. Heat Treatment: Heat treatment is a crucial step in improving the mechanical properties of U-bolts. After forming, U-bolts require heat treatment processes such as quenching and tempering. Quenching involves rapidly cooling the U-bolt to increase its hardness, while tempering reduces brittleness and improves toughness.

6. Forming: Depending on the application, some U-bolts require additional forming processes. Cold forming techniques, such as cold heading or cold forging, can be used to process specific features, such as threaded ends or special bends, to suit various applications.

Surface Coating and Finishing

7.Surface Coating: To improve the corrosion resistance and appearance of U-bolts, a surface coating treatment is required. Common coatings include hot-dip galvanizing, zinc plating, or epoxy coating. These coatings form a protective layer, improving the durability and service life of the U-bolts, especially in harsh or corrosive environments.

8. Finishing: After surface coating, U-bolts also require finishing processes such as polishing or grinding. These processes ensure a smooth surface, remove imperfections, and enhance their aesthetic appearance.

Quality Control and Inspection

Throughout the production process, we implement rigorous quality control to ensure that the U-bolts meet the required specifications and standards. Quality control checks include dimensional measurements, material testing, and visual inspections to ensure the strength, precision, and overall quality of the U-bolts. Samples from each batch may undergo destructive or non-destructive testing to verify their mechanical properties.

Square Bend U-Bolt Dimensions

Square bend U-bolts are typically used for attaching product to a square shaped post. They can also be embedded in concrete and used as anchor bolts. Round bend U-bolts are also available.

Signum provide square U-bolts according to the clients’ drawing and requirement.

Square U-bolts are typically dimensioned as follows:

Diameter (D) x Length (L) x Space between legs (C) x Thread (T)

Kunshan Signum Machinery Technology Co.,Ltd manufactures custom square bent U-bolts from 1/2″ through 4″ in diameter to virtually any ASTM specification. The surface finish can be plain finish,hot-dip galvanized,yellow zinc plated, dacromet, phosphate,etc.

Manufacturer Custom Square U-Bolts

Kunshan Signum Machinery Technology Co.,Ltd is able to manufacture square U-bolts according to customers' requirements or drawing with competitive price.

Direct Line:+86 512 50353196

Whatsapp:+86 158 6266 4803

Email: admin@rail-fastening.com

Web: www.rail-fastening.com

Address: 120 Tongjing Road, Lujia Town, Kunshan, Jiangsu 215331, China

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