General-purpose point-pressure straightening
Point-pressure correction with flat or contoured anvils gets brass rod and tube straight without press marks or scratches. The focus is cycle time, precision, and setup speed—so changeover is recipe-based, not operator-dependent.
You load the workpiece, select the stored recipe, and the machine runs the measure-press-verify loop automatically. The system checks runout at multiple points—not just the dial indicator at center—so you avoid late discovery of end-of-bar deviations.
Multi-point runout scanning with closed-loop correction holds tolerance across the full shift. Operators don't nudge a manual press or guess at spring-back; the controller recalculates pressure after each measurement pass.
Automatic measure-press-verify cycle replaces manual hammering, chalk marking, and sighting. One operator can run multiple machines, and 24/7 unmanned cycles are available for repetitive batches.
Enter diameter, length, and target straightness on the touchscreen. Stored recipes pull up prior parameters, so changeover between brass rod and tube takes minutes, and you don't need a toolmaker to set up.
Flat and contoured anvils handle thick brass rod and tube without leaving press marks or indentations. This matters for polished brass surfaces and parts that go directly to final assembly.
Deflection is measured at several positions along the workpiece, so far-end spring-back is corrected before it becomes scrap. The machine verifies straightness after pressing, not just during setup.
The PLC logs shift data and can connect to MES. Production engineers see real runout values, cycle counts, and rejection records without walking the floor or relying on paper logs.
The machine checks deflection at multiple positions while the part rotates. You see where the bend is before the ram moves, so you're not chasing spring-back on the far end after the press cycle closes.
The point-pressure tooling distributes force without sharp edges. Brass rod and tube come out straight with no indentations, scratches, or surface work hardening at the contact point—critical for polished or plated parts.
Square tube, plate, and special profiles go through the same recipe system. Cross-section changes don't require rebuilding the tooling; you change the workpiece, call up a recipe, and run.
Automatic measure-press-verify repeats the same way every cycle. Cycle time is not dependent on operator judgement, so an afternoon shift hits the same numbers as the morning shift, and the night shift doesn't drift.
These parameters are the ones plant engineers ask about first. The machine is not a fixed-offset press; the control system adapts pressure and support positions based on measured runout, which is why it holds tolerance across mixed brass batches.
| Parameter | Value |
|---|---|
| Workpiece types | Brass rod, tube, square tube, plate, special profiles |
| Max workpiece diameter | 250 mm |
| Standard workpiece length | 500–2,000 mm (longer beds on request) |
| Straightening accuracy | ≤0.01 mm |
| Measurement | Multi-point runout scanning, closed-loop correction |
| Pressure method | Servo-hydraulic point pressure |
| Anvil options | Flat, contoured, V-block |
| Control system | PLC + touchscreen, MES-ready |
| Cycle time | 45–120 s automatic correction loop (material-dependent) |
| Installed power | 7.5–22 kW servo-hydraulic (application-specific) |
| Machine weight | 4,200–6,500 kg (bed-length dependent) |
| Operation | Single operator, multiple machines; 24/7 unmanned optional |
Exact motor power, weight, and bed length are configured to your longest workpiece. Shangda builds these machines under ISO 9001 quality management and CE conformity for export.
The same recipe system works across round rod, tube, square tube, and plate. These are the shops where that flexibility makes the most difference. We see this machine in shops that run brass coil, bar, and tube in batches of 50 to 5,000 pieces, where swapping from one cross-section to another needs to happen inside a shift. If your current process uses a manual press and a granite surface plate, the cycle-time and inspection improvements show up immediately.
Brass rods drawn into connector pins and busbar blanks need straight stock before CNC turning. Corrected bars reduce tool chatter, scrap, and sorting time.
Brass tube for fittings and valve stems must not show anvil marks. Point-pressure tooling protects the surface while hitting straightness targets.
Tube straightened before bending and brazing keeps refrigerant paths consistent. Roundness correction can run in the same setup.
Short-run brass sensor housings and liquid-cooled pipe fittings change over quickly with stored recipes, so you don't lose production to setup.
If you're running brass rod or tube and fighting press marks, inconsistent straightness, or slow changeover, send a sample. We'll test it on this machine and give you measured runout before and after, cycle time, and photos of the surface condition.
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