Manhart How to determine the appropriate stroke limit and number of punches?

**How ​​to determine the appropriate stroke limit and number of punches**
1. Process type
When determining the appropriate stroke limit and number of punches, the first thing to consider is the type of processing technology. Different process types have different requirements for stroke limit and number of punches. For example, in a continuous stamping process, the stroke limit should ensure that the mold can be fully closed and opened, and the number of punches needs to meet the requirements of production efficiency and quality.
2. Punching force considerations
Punching force is an important parameter in the punching process, which directly affects the quality of the punching and the service life of the equipment. When determining the stroke limit and the number of punches, the size of the punching force needs to be considered. Excessive punching force may cause equipment damage or increased mold wear, while too small punching force may not meet the processing requirements. Therefore, it is necessary to set the appropriate stroke limit and number of punches according to the specific punching force requirements and equipment capabilities.
3. Number of strokes
The number of strokes refers to the number of times the mold opens and closes in a working cycle of the punch press. When determining the number of strokes, factors such as processing efficiency, equipment life and processing accuracy need to be considered. Too high a number of strokes may improve production efficiency, but it may also increase equipment wear and failure rate; too low a number of strokes may reduce production efficiency. Therefore, it is necessary to weigh the pros and cons according to the actual situation and choose the appropriate number of strokes.
4. Material properties
The hardness, thickness and toughness of the material have a great influence on the punching process. When determining the stroke limit and the number of punchings, the characteristics of the material need to be considered. For example, harder materials may require greater punching force and longer stroke time to ensure the punching quality; while softer materials may not require too high a punching force and too long a stroke time. Therefore, the stroke limit and the number of punchings need to be adjusted according to the material characteristics.
5. Accuracy requirements
Processing accuracy is a very important indicator in punching processing. When determining the stroke limit and the number of punchings, the accuracy requirements need to be considered. Higher accuracy requirements may require more precise stroke control and more stable punching times to ensure processing quality; while lower accuracy requirements may not require overly strict stroke limits and punching times control. Therefore, it is necessary to set the appropriate stroke limit and punching times according to the accuracy requirements.
6. Stamping Part Size
The size of the stamping part is also one of the factors to be considered when determining the stroke limit and the number of punchings. Larger stamping parts may require a larger stroke limit and more punching times to complete the processing; while smaller stamping parts may not require too high a stroke limit and too many punching times. Therefore, it is necessary to select the appropriate stroke limit and number of punchings according to the size of the stamping part.
7. Production batch
The size of the production batch will also affect the setting of the stroke limit and the number of punchings. In large-scale production, in order to improve production efficiency and quality stability, it may be necessary to set a higher number of strokes and a suitable stroke limit; while in small-scale production, it may not require too high a stroke number and too long a stroke time. Therefore, it is necessary to adjust the stroke limit and the number of punchings according to the size of the production batch.
8. Comprehensive consideration
After determining the above factors, it is also necessary to make a comprehensive consideration to determine the final stroke limit and number of punchings. When making a comprehensive consideration, it is necessary to comprehensively consider the interaction and influence between the various factors, as well as the specific conditions and needs in actual production. Through comprehensive consideration, it can be ensured that the set stroke limit and number of punching times can meet production needs while ensuring processing quality and equipment life.