When choosing the model and parameters of a hydraulic cold forging press, there are several factors that need to be considered to match the actual needs, and here are some key considerations:
Nominal pressure: Determine the nominal pressure of the hydraulic press according to the deformation force required for the cold forging parts to ensure that it can provide enough pressure to complete the cold forging process. Generally speaking, the nominal pressure is greater than the stamping process. However, for operations with long working strokes, it is also necessary to consider satisfying their workload curves.
Stroke: The stroke of the slider should meet the required size of the workpiece in height and be able to be smoothly removed from the mold after the stamping process is completed. For stretched parts, the stroke should be more than twice the height of the workpiece.
Work table size: To meet the correct installation requirements of the mold, the size of the worktable should generally be larger than the mold base 50-70mm (one side) under the mold, so as to facilitate installation.
Closing height: For crank presses, the closing height of the die should be between the maximum and minimum die loading height of the press.
Speed: Select the appropriate number of strokes according to the requirements of production efficiency. However, cold extrusion has specific requirements for the forming speed of the equipment, which requires special lubrication processing to ensure that the metal can be well formed at room temperature.
Accuracy: If the dimensional accuracy and surface quality of cold forgings are required to be high, it is necessary to choose a hydraulic press with higher precision.
Eccentric load capacity: Considering the eccentric load of the mold and workpiece in actual production, select equipment with strong anti-eccentric load capacity, especially for cold forging of parts with complex shapes.
Cold forging materials: The cold forging performance and deformation difficulty of different materials are different, and the common cold forging materials are lead, tin, aluminum, copper, zinc and their alloys, low carbon steel, medium carbon steel, tool steel, low alloy steel, stainless steel, gold, platinum, silver, etc. Understand the properties of the material to determine the required parameters such as pressure and stroke.
Part shape and size: Complex shapes and larger sizes may require a hydraulic press with a larger work surface, longer stroke, or higher pressure. For example, cold forging of parts such as splined shafts, gears, etc., may have specific requirements for equipment.
Batch size: When the batch size is large, productivity becomes an important factor, and equipment that can meet high productivity requirements needs needs be selected.
Equipment stability and reliability: ensure that the hydraulic press can maintain stable performance under long-term work, reducing failure and maintenance time.
Energy consumption: Considering the energy consumption of the equipment, choose an energy-saving hydraulic press to reduce long-term operating costs.
In the actual selection, you can also refer to the technical specifications and parameter tables provided by the hydraulic press manufacturer, as well as consult professional technicians, who can provide more accurate suggestions and selection solutions according to the specific cold forging process and product requirements. In addition, trial machining can be carried out if possible to verify that the selected equipment can meet the actual production needs. At the same time, with the development of technology, some new types of hydraulic cold forging presses may have better performance and characteristics, and you can also pay attention to the latest developments in the industry, understand and choose more advanced hydraulic press machine.