Upsetting forged rebar couplers offer a full strength connection together with enhanced fatigue resistance.
UPSETTING FORGED REBAR COUPLER
Upsetting forged rebar couplers offer a full strength connection together with enhanced fatigue resistance. They are suitable for projects of any size, including those requiring a high volume of couplers, such as road and rail bridges. Each end of the rebar to be joined is cut square and enlarged using a cold forge process. A thread is then formed on the enlarged bar end using a thread rolling machine. The thread is such that the cross-sectional area of the bar ends are not reduced ensuring the strength of the connection matches or exceeds that of the parent bars.
1.Material: 45#carbon steel, 40Cr
2.Thread Pitch: 2.5, 3.0
3.Tread angle: 60°, 75°
4.Standard : HRB400, HRB500
5.Craft: Tapping craft( normal); CNC Craft
Standard of Upsetting Forged Rebar Couplers:
|Length mm||Thread Pitch mm||Thread Angle|
1. No reduction of bar cross-section area and bar –break feature
2. No torque wrench required
3. Assembly validated by visual inspection
4. Standard ISO parallel Metric Thread Design.
Step 1. Cutting the rebar end to make it flat
Step 2. Enlarging ends of reinforced bars by cold upsetting (Rebar Upset forging Machine )
Step 3. Threading parallel threads rebar end by DLADTO Rebar Thread Cutting Machine
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