The C type mechanical power press, also often called an open-type mechanical press or C-frame mechanical press, gets its name from its “C”-shaped frame. It’s used in industrial production for a variety of processes, including metal punching, blanking, bending, folding, shallow drawing, etc.
This unique C-shaped opening allows the mold to be clamped and operated from the front, left, and right, facilitating material loading and unloading and monitoring the production process. It’s particularly suitable for processing small and medium-sized parts.
Recommended Product - World Group C Type Mechanical Power Press
World Group boasts over 70 years of power press manufacturing and R&D experience. The JH Series C-Type Mechanical Power Press is the result of World’s accumulated experience and has been sold globally to rave reviews. Key features of the World C frame power press include:
- The press body is annealed for high strength and toughness, resisting deformation.
- Electric lubrication effectively improves efficiency.
- Overload protection with an emergency stop function enhances safety and reliability.
- A smart display monitors usage in real time, identifies faults, and ensures accuracy.
- Optional accessories include an optical protection device and a QDC device.
Applications
Automotive Industry: Used in the production of various automotive parts, such as engine assemblies, steering components, brake discs, bearing presses, wheel hub units, and body panels.
Hardware and Daily Necessities Industry: Used in the production of various hardware tools, lunch boxes, tableware, locks, containers, and other daily consumer goods.
Home Appliance and Electronics Industry: Used in the stamping, forming, and assembly of home appliance housings, internal structural components, and various precision electronic components.
HVAC System Industry: Used in the production of TDF corners, brackets, hangers, bolts, mounting plates, rivet nuts, etc.
Core Technical Parameters of a C-type Mechanical Power Press (Varies by Brand and Model):
- Motor Power: Typically 1-40kW.
- Nominal Force/Tonnage: Common tonnages range from 5, 25, 50, to 160 tons. Some large C-type mechanical power presses even reach 4,000 kN (approximately 400 tons).
- Press Speed/Strokes: Refers to the number of reciprocating motions the slide completes per minute, typically ranging from dozens to over a hundred per minute.
The following parameters often vary depending on application requirements. World Group can customize these parameters to meet customer needs.
- Slide Stroke: Refers to the distance the slide travels from top dead center to bottom dead center.
- Die Height: The distance from the bottom of the slide to the worktable when the slide is at bottom dead center and stroke is adjusted to maximum. This determines the maximum height that can accommodate a mold.
- Bolster Area: The range of mold sizes that can be installed.
- Slide Adjustment: Used to fine-tune the closing height to accommodate molds of varying heights.
Main Components of a C Type Mechanical Power Press
A typical C-type mechanical power press consists of the following components:
Frame: Made of cast iron or welded steel, it withstands the reaction force generated during stamping, ensuring overall rigidity and positioning accuracy.
Drive System: Consists of an electric motor, flywheel, clutch, gears (gearwheel/pinion), and crankshaft (or eccentric gear). The motor drives the flywheel to store energy, the clutch controls start/stop, and the gears transmit power to the crankshaft. The crankshaft, through connecting rods, converts circular motion into linear reciprocating motion for the slide.
Slide: Connected to the crankshaft via connecting rods, it reciprocates up and down along the guide rails of the frame. The punch is mounted on top, pressing the workpiece downward; the slide itself is also equipped with a position sensor and safety stop.
Bolster: Fixed to the bottom of the frame, it houses the die, provides support, and transmits the stamping reaction force. The workbench is typically equipped with an adjustment mechanism for quick mold changes.
Control System: This includes an electrical control cabinet, an operator panel, and a PLC (Programmable Logic Controller), enabling automated control of the clutch, brake, stroke counter, speed control, and other functions. Modern machines can also integrate with MES/IoT for remote monitoring and data collection.
Safety Devices and Overload Protection: These primarily include emergency stop buttons, travel limit switches, overload detection (torque/current monitoring), and guardrails/light barriers. These ensure immediate stopping of the press in the event of an abnormality, protecting both the operator and the equipment.
Control System and Automation Options for C-Type Mechanical Power Presses
- PLC (Programmable Logic Controller) improves control efficiency and precision
- Touchscreen HMI (HMI) enables human-machine interaction
- Inverter for speed control
- Automation Integration: Optional configurations include automatic feeders, material levelers, quick die changers (QDCs), photoelectric protection devices (light curtains), and finished product conveyors.
Classification of C Type Mechanical Power Press
| Classification | Specific Types | Features |
| Number of Crankshafts | C-Type Single Crank Press | Using a single crankshaft to drive the slide, this machine boasts a relatively simple structure and a relatively small size, making it suitable for general mass production. |
| C-Type Double Crank Press | Using two synchronous crankshafts, this machine achieves higher impact force and smoother operation, making it suitable for high-power or high-precision processing. | |
| Drive Method and Speed | General-Purpose C-Type Mechanical Power Press | Using a traditional mechanical drive, the speed is typically <200 SPM, making it suitable for general stamping tasks. |
| High-Speed Precision C-Type Mechanical Power Press | Using a high-speed mechanical or hydraulic drive, the speed is typically >400 SPM, making it commonly used for small parts or high-precision forming. | |
| Machine Tool Structure | C-Type Fixed Table Press | The fixed machine body and stable worktable make it suitable for high-volume, continuous processing. |
| C-Type Tilting Press | The tiltable worktable facilitates processing of tilted or irregularly shaped workpieces. (Less common than fixed-type machines.) | |
| Transmission Structure | C-Type Straight Shaft Precision Press | Using a direct-axis drive, this machine features a compact structure, a linear motion path, and high precision. |
| C-Type Linkage Press | Using a connecting rod mechanism, this machine maintains high stroke speeds during drawing operations, making it suitable for deep drawing or high-speed forming. |
