TMT Bar Cold forging machine

TMT Bar Cold forging machine

Hydraulic Rebar End Upsetting Machine for Mechanical Coupler Applications

Surya Engineering manufactures hydraulic TMT Bar Cold Forging Machines designed to enlarge the ends of reinforcement bars before threading. The machine uses controlled hydraulic pressure to upset the TMT bar end at room temperature, creating an enlarged section suitable for subsequent thread rolling or machining as required by the mechanical rebar coupler system.

The cold forging process prepares reinforcement bars for parallel-thread mechanical splicing. By increasing the diameter of the bar end before threading, the machine helps compensate for the material removed during thread formation and supports the preparation of mechanically strong rebar connections.

Available in SE-32 and SE-40 models, Surya Engineering's Rebar Cold Forging Machines accommodate TMT bar diameters from 16 mm to 32 mm and 16 mm to 40 mm respectively. These hydraulic machines are suitable for rebar processing facilities, coupler manufacturing units, reinforcement fabrication workshops and construction-related industrial applications.

How Does a TMT Bar Cold Forging Machine Work?

A TMT Bar Cold Forging Machine works by applying controlled hydraulic force to the end of a reinforcement bar. The process enlarges the selected portion of the bar without conventional heating, preparing it for subsequent threading operations.

The working process involves:

1. Bar Cutting: The TMT reinforcement bar is cut to the required length with a square end.
2. Bar Positioning: The bar is inserted into the machine and positioned according to the required forging length.
3. Hydraulic Clamping: The clamping cylinder securely holds the reinforcement bar in position.
4. Cold Forging: Hydraulic pressure pushes the bar end into the forging die, increasing its diameter.
5. Bar Removal: The forged bar is released and removed after the forging cycle.
6. Threading: The enlarged bar end is processed using a compatible rebar threading machine.
7. Coupler Installation: The threaded bar is connected using the appropriate mechanical rebar coupler.

Key Features of Surya Engineering TMT Bar Cold Forging Machine

• Hydraulic Forging System: Applies controlled pressure for TMT bar end upsetting.
• Cold Forging Technology: Enlarges the reinforcement bar end without conventional heating.
• Heavy-Duty Construction: Designed for industrial rebar processing applications.
• Secure Clamping Arrangement: Holds the bar in position during the forging operation.
• Precision Forging Dies: Helps achieve consistent bar-end dimensions.
• Semi-Automatic Operation: Supports repetitive bar-end preparation.
• Multiple Capacity Options: Available for reinforcement bars up to 32 mm and 40 mm.
• Threading Compatibility: Designed to prepare forged bar ends for compatible mechanical threading systems.

its important to use TMT bar Cold forging machine

Need to prepare TMT bar ends for mechanical coupler connections? A TMT Bar Cold Forging Machine enlarges the bar ends using hydraulic pressure before threading. This helps compensate for the material removed during thread formation and prepares the bars for compatible coupler connections.

Specifications

SE-40 – Better for larger rebars

• Handles rebars up to 40 mm.

• Higher rated forging force (3000 kN).

• Suitable for applications requiring larger bar-end enlargement.

SE-32 – Suitable for smaller rebars

• Handles rebars up to 32 mm.

• Lower motor power.

• Lighter machine.

Standards and Quality Considerations

The TMT Bar Cold Forging Machine is designed for preparing reinforcement bar ends for mechanical coupler applications. The cold forging process should follow the applicable requirements of the selected mechanical splicing system.

For upset parallel-threaded couplers, IS 16172:2023 specifies relevant requirements for the preparation and inspection of reinforcement bar ends, including hydraulic cold forging and maintaining the required cross-sectional area after threading.

Machine design and safety considerations should also address applicable hydraulic, electrical and machinery safety requirements.

The final forged dimensions and threading specifications should be verified against the coupler manufacturer's recommendations and relevant project requirements.

Why do we use a TMT Bar Cold Forging Machine?

When two reinforcement bars need to be connected, there are different joining methods:

• Overlapping (lap splicing).

• Welding, where permitted by the design and applicable requirements.

• Mechanical coupler connections.

In a mechanical coupler system using upset parallel threads, the bar end needs to be enlarged before threading.

Why?

When a thread is cut directly into a TMT bar, some steel material is removed. This reduces the cross-sectional area at the threaded portion.

Cold forging enlarges the bar end before threading, helping compensate for that material removal.

The purpose: To prepare the threaded bar end so that the mechanical connection can meet its specified strength and performance requirements.

In which site or project situations is it useful?

Here are the main situations where a project may specify mechanical couplers and therefore require cold forging.