Recently, a Russian industrial client has put forward requirements for straightening high-hardness alloy steel workpieces, covering three major categories: hollow hexagonal bars, solid round bars and seamless round tubes. These workpieces are mainly used in high-end equipment manufacturing fields such as oil and gas drilling, mining machinery and precision transmission components.
Made of high-strength structural steels like 23XH3Mo (23CrNi3Mo) and S35, these workpieces feature a core hardness of 38–46 HRC, a maximum surface hardness of up to 60 HRC, and a yield strength of approximately 315–1100 MPa, which imposes extremely high demands on straightening accuracy, surface protection and equipment stability. Detailed workpiece information is as follows:
| Type | Hexagonal steel | round bar | round tube |
| Diameter Range | The circumscribed circle diameter of the hexagon is 41.6 mm. | 20-50mm | 20-50mm |
| Maximum Length | 2400-6000mm | 1000-6000mm | 1000-6000mm |
| Thickness Range | 25mm | / | 10-25mm |
| Material & Hardness | Hollow hexagonal HEX25, HEX32, HEX35; hexagonal S35
(hardness 38-46 HRC, surface hardness 55-59 HRC).
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Steel – 23ХН3Мо Steel
Original steel or heat-treated structural steel (core hardness 38-46 HRC, surface hardness 54-58 HRC), workpiece hardness can reach up to 60 HRC. |
Steel – 23ХН3Мо Steel
Original steel or heat-treated structural steel (core hardness 38-46 HRC, surface hardness 54-58 HRC), workpiece hardness can reach up to 60 HRC. |
| Pictures for Reference |  |
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To meet the high-precision straightening requirements of high-hardness, long-length and multi-section workpieces, we have customized a multi-functional hydraulic straightening machine for the client, with the following parameters:
| Technical Specification| Model | ATS-A63-M1 |
| Maximum loading force (nominal force) | ≤630KN |
| Table Size | 7000*700mm |
| Applicable workpiece length | 1000mm≤L≤6000mm |
| Applicable workpiece diameter | 30mm≤D≤50mm
(For workpieces with a diameter of 20-30mm, it is necessary to confirm the length and yield strength of the workpiece.) |
| Number of straightening measurement channels | Adjustable within channels 1 to 10 |
| Sensor resolution | 0.001mm |
| Repeat measurement accuracy | 0.005mm |
| Master cylinder idle speed | 40mm/s |
| Loading speed | 6～12mm/s |
| Return speed | 40mm/s |
| R-axis rotation speed | ≤300r/min（Position Servo Driver） |
| X-axis travel speed | ≤200mm/s |
| Opening height | About700mm |
| Cylinder travel | ≥400mm |
| Loading methods | Standard pump pneumatic hydraulic loading |
| Slewing center type | Roller drive (Head frame + tail frame) |
| Slewing center drive type | Servo drive |
| Slewing center clamping type | Friction wheel + pneumatic |
| Tooling position setting type | Manual locking setting |
| Measuring sensor type | Measuring rod contact measurement |
| Support type | Cylinder push rod support |
| Support block type | U-shaped support block |
| Preset pressure | Adjustable |
| Alignment method | Intelligent decision-making automatic straightening |
| CNC stroke limit | Program control with two operation modes (touchscreen, button, digital display) |
This customized hydraulic straightening machine perfectly solves the straightening challenges of high-hardness, multi-section and long-length alloy steels, providing a reliable, efficient and high-precision solution for Russian clients in the field of heavy equipment manufacturing. It is an ideal choice for processing high-strength structural steels such as 23XH3Mo and S35.
If you also need a suitable hydraulic straightening machine, please feel free to consult Shanghai ANTISHICNC Machine. As a seasoned supplier of metal machining equipment, we have rich experience in mechanical equipment manufacturing and application, and can provide you with professional technical support.
Keywords:
Straightening Machine, Hydraulic Straightening Machine, High-Hardness Alloy Steel Straightening, Multi-Functional Hydraulic Straightening Machine, Multi-Functional Straightening Machine