
YS31 SERIES
Steel Back Finishing Hydraulic Press
Steel Back Bevel Pressing · Punching · Pin Pulling · Finishing Specialist
Specially designed for the steel back industry, with three-beam four-column structure and top-mounted oil tank for robotic automation.
Product Overview

The YS31-C steel back finishing hydraulic press is developed by Foshan Chengda Hydraulic Equipment for the steel back industry (brake pads, clutch facings, friction materials). It is widely used for steel back bevel pressing, punching, pin pulling, and precision finishing processes.
The machine adopts a three-beam four-column structure with a top-mounted oil tank, leaving the worktable open on all four sides for easy robotic loading and automated production line integration.
Equipped with a servo control system, large-diameter cartridge valves, HMI parameter adjustment, and oil cooling system, the YS31-C delivers ±3% pressure repeatability, ±0.03mm position accuracy, and 30–50% energy savings compared with standard motors.
Core Features
Three-Beam Four-Column Structure
Top-mounted oil tank with worktable open on all four sides, convenient for robotic arm loading and automated production
Servo Closed-Loop Control
Flow and pressure closed-loop control technology with ±3% main cylinder pressure repeatability and ±0.03mm position accuracy.
30–50% Energy Saving
Servo system delivers significant energy savings and quieter operation compared with standard motors.
HMI Parameter Adjustment
Pressure, position, speed, and holding time can be flexibly adjusted on the screen according to actual process requirements.
Large-Diameter Cartridge Valve
Reduces oil flow resistance, lowers hydraulic heat generation, and protects sealing rings and hydraulic components.
Oil Cooling System
Superior cooling performance compared with traditional water cooling, ensuring long-term stable operation of automatic production lines.
Multi-Process Capability
Multiple combination control options tailored for the steel back industry: bevel pressing, punching, pin pulling, and finishing.
Five Upgraded Designs for Steel Back Industry
Compared with standard models, YS31-C has been upgraded in the following 5 key components, specifically engineered for the steel back industry’s demanding environment.

1 · Frame Casting Upgrade
High-strength cast iron frame with aging treatment for improved rigidity and vibration resistance during high-frequency steel back finishing.
2 · Servo Drive Upgrade
Imported high-response servo drive with closed-loop feedback for ±0.03mm position accuracy and faster dynamic response.
3 · Precision Sensor Upgrade
High-precision pressure and displacement sensors for real-time closed-loop monitoring and consistent product quality.
4 · Guide System Upgrade
High-precision guide column with wear-resistant bushing ensures long-term stable operation and finishing accuracy.
5 · Automation Interface Upgrade
Reserved robotic arm and MES interface for direct connection to automated production lines and smart factory systems.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | YS31-C Series |
| Machine Type | Three-Beam Four-Column Hydraulic Press |
| Applicable Industry | Steel Back (Brake Pads / Clutch Facings / Friction Materials) |
| Core Process | Bevel Pressing, Punching, Pin Pulling, Finishing |
| Structure | Three-Beam Four-Column, Top-Mounted Oil Tank |
| Worktable | Open on Four Sides |
| Control System | Servo Closed-Loop Control |
| Pressure Repeatability | ±3% |
| Position Accuracy | ±0.03mm |
| Energy Saving | 30–50% |
| Hydraulic Valve | Large-Diameter Cartridge Valve |
| Cooling System | Oil Cooler |
| Control Interface | HMI Touch Screen |
