Rebar upset forging parallel thread machine for rebars from 12 - 40mm

Specifications:

The parameter for standard couplers

The parameter for machine

Description:

Rebar upset forging parallel thread machine is a parallel-threaded mechanical splicing system designed for the connection of concrete reinforcing bars from Ø 12 to 40 mm.

Designed and manufactured in compliance with ACI 318, IBC 2006, BS 8110, Eurocode 2, DIN 1045.

Machine:

A. Standard machine

B. Automatic machine

steps process

1. Cutting

The end of the reinforcing bar is sawn square.

2. Cold forging

The sawn end of the reinforcing bar is then enlarged by a patented cold forging process. The core diameter of the bar is increased to a pre-determined diameter.

3. Threading

Finally, the thread is mechanically cut onto the enlarged end of the bar.

Splicing methods

Standard splice  

Easy connection by bar rotation until full thread engagement. Parallel thread : No risk of thread mis-match. No risk of cross-threading.   

Position splice

Even when both bars cannot be turned, this system uses a standard coupler: The coupler is fully engaged onto the extended thread of the connecting bar. The assembly is simply completed by butting the bars end to end and screwing back the coupler onto the first bar until full engagement. lock-nut to maintain the second bar in position. 

Bridging splice

When the bars cannot be brought butt to butt (as it may happen in cages manufacturing), Bridging splices are the answer. Both bars are threaded with a standard thread, and a “Bridging Assembly Set” is used to connect  them.  

Transition splice

When there is a need to splice bars of different sizes, it is allowable in most cases to reduce the size of the larger bar and to use a standard coupler. However we also proposes special transition couplers that conveniently avoid the difficult task of planning in advance the need of transitions.

End anchors

A convenient alternative to hooked bars to provide end anchorages in congested areas. Standard anchorage heads are circular and have a net bearing area of 4 times or 9 times the cross-section of the bar, but can also be made to order in other shapes or dimensions to fit the application requirement.

Weldable couplers

For composite construction where concrete reinforcement bars must be welded to structural steel, use weldable couplers, which are specially made from low carbon steel and which have a large chamfer for bevel welding.

Applications

1. Jiangsu Runyang Bridge in China

2. Jeddah Water Pump station in Saudi Arabia

Competitive Advantage:

1. No reduction of the bar cross section area.

1. Full-Tension splice: Bar-break under tensile load.

1. Allows full ductile elongation of bars.
2. Easy installation, no torque wrench required.
3. One standard coupler for splicing requirements(Standard/Position)
4. Manufactured under strict quality assurance plan ISO 9001, Third party tested.
5. Full traceability of material origin and production batch.
6. Coupler suitable for seismic areas.              
7. Tested under reverse-cyclic conditions.
8. Solves bar congestion problems.

1. No staggering of splices bars required.