Manhart How to evaluate the effectiveness of replacing or grinding the blades of a punching and shearing machine?

The evaluation of the effectiveness of punching and shearing machine blades after replacement or grinding is an important step to ensure that the blade performance is restored and meets production needs. The following are the steps and considerations to follow when conducting an effectiveness evaluation:
1、 Assessment preparation
1. * * Determine evaluation objectives * *: Clarify the main purpose of the evaluation, which is to confirm whether the blade replacement or grinding has achieved the expected results, such as cutting accuracy, cutting efficiency, blade sharpness, etc.
2. * * Prepare evaluation tools * *: Based on the evaluation objectives, prepare corresponding evaluation tools such as microscopes, hardness testers, cutting testing machines, etc.
2、 Evaluation methods
1. * * Visual inspection * *:
-Use a magnifying glass or microscope to observe the surface of the blade and check its flatness, uniformity, smoothness, and burrs.
-The surface of the blade should be flat, without obvious defects, and the blade edge should be sharp and without notches.
2. * * Cutting test * *:
-Conduct cutting tests in the laboratory or production workshop, using blades to cut materials of the same type.
-Observe the cutting process and record parameters such as cutting force, cutting temperature, and cutting surface quality.
-Sharp blades should be able to generate less cutting force and temperature, and the cutting surface quality should be good without obvious burrs and chips.
3. * * Sound Assessment * *:
-During the cutting process, pay attention to the sound produced when the blade comes into contact with the material.
-Sharp blades should produce a crisp sound, not a harsh or low pitched sound.
4. * * Hardness test * *:
-Use a hardness tester to test the hardness and toughness of the blade.
-Blades with high hardness may be prone to brittle fracture, while blades with low hardness may lead to rapid wear.
3、 Evaluation criteria
1. * * Cutting effect * *: The blade should be able to easily cut similar materials without producing obvious burrs and chips.
2. * * Sound evaluation * *: The blade should produce a clear and crisp sound during cutting, without any obvious abnormal noise.
3. * * Hardness Test * *: The hardness of the blade should be within a reasonable range to ensure its resistance to deformation and wear resistance.
4、 Analysis of evaluation results
1. * * Comprehensive evaluation * *: Based on the above evaluation results, determine whether the effect of blade replacement or grinding has achieved the expected goals.
2. * * Problem diagnosis * *: If it is found that the blade performance does not meet expectations, further analysis is needed, such as material selection, grinding process, etc., in order to take corresponding measures for improvement.
5、 Summary and suggestions
1. * * Summary of evaluation results * *: Summarize the evaluation process and clarify the performance after blade replacement or grinding.
2. * * Propose improvement suggestions * *: Based on the problems and deficiencies identified during the evaluation, propose corresponding improvement suggestions to optimize blade performance and extend service life.
By using the above steps and methods to evaluate the effect of replacing or grinding the punching and shearing machine blades, it can ensure that the blade performance is restored and meets production needs, improve production efficiency and product quality.