Rebar upsetting machine

A rebar upsetting machine is a specialized piece of equipment used in infrastructure projects such as bridges, high-speed railways, and building construction for processing rebar joints. Its core function is to cold-upset the ends of rebars, enhancing the anchoring force and load-bearing strength of the connection between the rebar and the sleeve. The equipment employs a hydraulic drive and CNC control system, coupled with high-strength alloy molds. The machine body is constructed through integral casting or welding of thick steel plates, resulting in high rigidity and impact resistance. During processing, threaded steel or round steel bars with specifications of Φ16-40mm are fed into the positioning fixture. The CNC system precisely controls the upsetting pressure (up to 100-200MPa) and upsetting length. The molds perform cold extrusion plastic deformation on the rebar ends, increasing the end diameter by 1.4-1.8 times. The upset portion also exhibits refined grains and higher strength than the base material. The equipment is compatible with various high-strength rebars such as HRB400E and HRB500, with upsetting errors controlled within ±0.2mm. The joint quality meets the requirements of the "Technical Specification for Mechanical Connection of Rebars". As a key pre-processing device for mechanical connection of reinforcing bars, it solves the problems of brittle fracture and insufficient strength in traditional welded joints, providing reliable protection for the safety of engineering structures. It is widely used in scenarios with high requirements for the strength of reinforcing bar joints, such as long-span bridges and high-rise building pile foundations.

Features

1. Highly Efficient Cold Forging: Utilizing cold forging technology, no heating is required. The upsetting cycle for a single reinforcing bar is only 3-5 seconds, and 800-1200 bars can be processed in 8 hours, which is 3-4 times more efficient than traditional heated upsetting.

2. Extremely High Upsetting Precision: The CNC system precisely controls pressure and length, with an upsetting diameter error ≤ ±0.2mm and a length error ≤ ±0.5mm, ensuring a perfect fit between the joint and the sleeve.

3. Reliable Joint Strength: The strength of the reinforcing bar ends increases by 10%-20% after cold forging, and the tensile strength of the joint far exceeds that of the base material, preventing the joint from becoming a weak point in the structure.

4. Convenient and Intelligent Operation: Equipped with a touchscreen interface, it allows for preset upsetting parameters for different rebar specifications, supports parameter storage and recall, and can be used by beginners in 30 minutes.

5. Highly Durable Molds: The molds are made of high wear-resistant alloy materials such as Cr12MoV and undergo vacuum quenching. A single mold set can process 5000-8000 rebars, and replacement is convenient.

6. Comprehensive Safety Protection: Features hydraulic overload protection, an emergency stop button, and protective baffles to prevent rebar ejection or mold breakage from causing injury, complying with safety production regulations.

7. Wide Compatibility: Supports processing rebars of Φ16-40mm, and allows for quick mold changes to adapt to different diameter rebars, meeting the needs of multi-batch, multi-specification processing.

8. Low Maintenance Costs: The hydraulic system uses components from well-known brands, resulting in a low failure rate; few vulnerable parts and low replacement costs; annual equipment maintenance costs are less than 5% of the purchase cost.