Twin-head forming machine HDCJ series

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Overview
The reliability of rebar connections is critical for construction projects such as buildings, highways, bridges and infrastructure. The YG rebar upsetting machine performs cold upsetting of ribbed rebar ends to increase diameter and tensile strength, enabling equivalent-strength parallel thread connections. This equipment improves joint performance and construction efficiency compared with traditional lapping or welding methods.

How it works & core advantages

• Upsetting principle: Cold-forging (upsetting) increases the rebar end diameter by controlled axial compression, producing a uniform upset section ready for threading.
• Structure and workflow: Composed of a frame, clamping jaws, cycloidal pinwheel reducer, rib-peeling rolling head, feeding mechanism, cooling system and control box to ensure fast, repeatable forming.
• Core advantage: Upset-thread connections provide stable, high joint tensile strength without metallurgical changes caused by welding, enabling reliable performance in varied site conditions.
• Large-flow hydraulic pump and precise piston stroke control (e.g., 140mm stroke) ensure consistent forming force (up to 2036KN on single-cylinder models).
• Simple operation reduces operator training requirements and speeds assembly on site.

Technical Parameter of Rebar Upsetting Machine (table)
Model | HDCJ-32 | HDCJ-40 | GDCJ-40
Processing Reinforcement Range | 12~32mm | 12~40mm | 12~40mm
Motor Power | 4Kw | 7.5Kw | 4Kw
Max. Flow | 5.42L/min | 4.0L/min | 6.4L/min
Pressure | 2036KN | 3000KN | 2036KN
Max Working Pressure | 80MPa | 31.5MPa | 80MPa
Dimension | 1020*500*965mm | 1300*830*1350mm | 1300*650*965mm
Weight | 560Kg | 900Kg | 600Kg

Deep Dive & Technical Edge
The machine cold-extrudes the rebar end (threading section) to increase diameter by approximately 3–5mm, then the upset section is thread-rolled to form a parallel thread connector. This upsetting-threading sequence ensures the connector strength meets or exceeds the base material, achieving equivalent-strength joints without welding-induced metallurgical changes.

Additional benefits and workflow features

• High upsetting force combined with precise piston-stroke control for reliable, repeatable forming.
• High processing speed supports large-volume projects and fast line throughput.
• Cooling system permits long continuous operation for batch production.
• Seamless integration with thread-rolling equipment enables an efficient production workflow from upsetting to threading.

Applications

• Roads, bridges and high-speed rail: suitable for foundations, main beams and piers requiring high seismic performance.
• Subway and tunnel works: compact, reliable connections for underground structural elements.
• Nuclear and major power plants: meets strict structural safety requirements for critical projects.

Operational guidance and selection

• Single-Cylinder Model: Compact, lighter (~560Kg). Suitable for medium-to-small projects or constrained sites; handles 12–32mm reinforcement.
• Twin-Cylinder Model: Provides higher upsetting force and faster throughput; recommended for large-diameter rebar (eg. 40mm) and high-volume projects.
• Selection advice: For repetitive processing of the same diameter at large volumes, twin-cylinder units offer better cost-efficiency and uptime.

Specifications

• Model: HDCJ-32 — Processing Reinforcement Range: 12~32mm; Motor Power: 4Kw; Max. Flow: 5.42L/min; Pressure: 2036KN; Max Working Pressure: 80MPa; Dimension: 1020*500*965mm; Weight: 560Kg.
• Model: HDCJ-40 — Processing Reinforcement Range: 12~40mm; Motor Power: 7.5Kw; Max. Flow: 4.0L/min; Pressure: 3000KN; Max Working Pressure: 31.5MPa; Dimension: 1300*830*1350mm; Weight: 900Kg.
• Model: GDCJ-40 — Processing Reinforcement Range: 12~40mm; Motor Power: 4Kw; Max. Flow: 6.4L/min; Pressure: 2036KN; Max Working Pressure: 80MPa; Dimension: 1300*650*965mm; Weight: 600Kg.