How to choose a suitable high-speed punching machine?
Choosing a suitable high-speed punching machine requires comprehensive consideration of the following aspects:
1、 Processing requirements
Stamping part types: Different types of stamping parts have different requirements for the punching machine. For example, for small and medium-sized metal material punching parts, bending parts, or shallow drawing parts, an open punch press is more suitable. Its body opens on three sides, making it easy to operate and assemble molds, feeding machines, and automatic mold changing equipment to achieve intelligent production. It is also affordable; For large, medium, small or high-precision stamping products, it is advisable to use door type high-speed punching machines and two axis high-speed punching machines; For stamping processes such as straightening, calibration bending, and plastic surgery, high-speed punching machines with high strength and rigidity should be selected
Precision requirements: If stamping parts require extremely high precision, such as precision components in industries such as electronics and automobiles, it is necessary to choose high-speed punching machines with high processing precision. The flatness of the worktable, the accuracy of the slider movement, and the parallelism of the upper and lower die seats should all reach a high level to ensure the dimensional and shape accuracy of the stamping parts
Production batch size: The size of the production batch is also an important factor in choosing high-speed punching machines. If it is large-scale production, high-speed punching machines with high production efficiency and automation should be selected, such as punching machines equipped with automatic feeding devices and rapid mold changing systems, to improve production efficiency and reduce production costs; For small-scale production, relatively flexible and low-priced punching machines can be selected according to specific situations
2、 Equipment performance
Tonnage: The tonnage of the selected high-speed punch must exceed the stamping pressure during actual stamping production, and the product load curve should be ensured to not exceed the allowable load curve of the high-speed punch as much as possible. When punching and calibrating bending parts, the maximum punching force should be less than 80% -90% of the tonnage; When deep drawing, the maximum drawing force shall not exceed 50% -60% of the tonnage; When shallow drawing, the maximum drawing force shall not exceed 70% -80% of the tonnage
Travel and speed: The travel and speed should be determined according to the specific stamping process. When manually feeding materials, it is not advisable to use high-speed punching machines with too many strokes; When automatic stamping, it is advisable to choose high-speed punching machines with more strokes. When deep drawing, high-speed punching machines with too many strokes should not be used because the drawing is too fast and the material is not fully deformed in time, making the parts prone to cracking
Mold height: The mold height of the punch press should match the height of the mold used, that is, the closing height of the mold should be between the maximum and minimum mold heights of the punch press. In addition, considering factors such as the shortening of the crankshaft after wear and the possibility of reducing the closing height of the mold during future mold repairs, the height of the stamping mold is generally taken to be close to the maximum mold mounting height of the punch press when designing the mold
Workbench size: The workbench size needs to be determined based on the actual size of the installed mold. If the mold is large, the equipment workbench size can be increased according to the requirements
3、 Equipment quality and stability
Brand and reputation: High speed punching machines from well-known brands are usually more guaranteed in terms of quality, performance, and after-sales service. You can learn about the reputation and market recognition of different brands by consulting industry information, consulting peers, and viewing user reviews, and choose brands with good reputations
Manufacturing process: High quality high-speed punching machines adopt advanced manufacturing technology and high-precision processing equipment, which can ensure the accuracy and stability of the equipment. For example, the bed body is welded with high-strength cast iron or steel plate, and undergoes aging treatment to eliminate internal stress, which can effectively prevent deformation; Key components such as crankshafts, gears, connecting rods, etc. have undergone precision machining and heat treatment, resulting in high hardness and wear resistance
Control system: Advanced control systems can achieve precise control of punch presses, improving machining accuracy and production efficiency. For example, numerical control systems have the advantages of simple programming, convenient operation, and high degree of automation, and can achieve complex functions such as multi coordinate linkage and high-speed high-precision machining
4、 Security
Safety protection device: High speed punching machines should be equipped with comprehensive safety protection devices, such as photoelectric protection devices, manual operation buttons, safety light curtains, emergency stop buttons, etc., to prevent operators from being injured during operation
Compliance with safety standards: Ensure that the selected high-speed punching machines comply with relevant national and industry safety standards, such as mechanical safety, electrical safety, noise control, etc., to ensure the safe and reliable operation of the equipment.
