The bending machine is an indispensable equipment in industrial manufacturing, used for the shaping and processing of metal sheets. Correctly selecting and using bending molds is crucial to ensuring product quality and enhancing production efficiency. This article will provide a detailed overview of bending machine mold types, selection methods, and address potential issues users may encounter during usage.
Overview of Bending Mold Types
Bending molds can be categorized into various types based on their shape and function, including:
- L-shaped, R-shaped, U-shaped, and Z-shaped molds: These molds are named according to the shape of the metal sheet after bending and are suitable for producing various specific-shaped products.
- Upper mold angles: The upper mold is designed with different angles, commonly including 90°, 88°, 45°, 30°, and 20°, to accommodate different bending requirements.
- Double-groove and single-groove lower molds: Double-groove molds are suitable for materials of various thicknesses, while single-groove molds are suitable for specific thicknesses.
- Special function molds: Such as flattening molds, R-lower molds, acute angle lower molds, used for special bending operations.
Mold Selection and Utilization
1. Physical Characteristics and Applicability of Molds
Bending molds are typically made of specially heat-treated steel, featuring high hardness, wear resistance, and the ability to withstand high pressure. When selecting molds, the following factors should be considered:
- Mold load-bearing capacity: Each set of molds has its maximum load-bearing capacity. When in use, the appropriate mold length should be selected, and it is strictly prohibited to exceed the maximum pressure indicated for the mold.
- Consistency in mold height: All molds used on the same machine should have the same height to ensure processing accuracy and equipment safety.
- Material hardness, thickness, and length: Choose suitable upper and lower molds based on these physical characteristics of the metal sheet to ensure bending quality and efficiency.
2. Bending Special Shapes and Angles
- Sharp and dead-angle bending: When performing sharp or dead-angle bending, molds with angles above 30° should be selected, first bending the sharp angle, then pressing the dead angle.
- R-angle bending: Special R upper and lower molds should be used for precise curvature when bending R-angles.
- Bending long workpieces: When bending longer workpieces, it is advisable to avoid using segmented molds to reduce pressure marks at the seams. Additionally, choose single-groove lower molds to enhance overall bending integrity.
FAQ
Q1: How to choose suitable bending molds?
A: Firstly, determine the mold type based on material thickness, length, and the expected bending shape. Secondly, consider the hardness and load-bearing capacity of the mold to ensure that the selected mold can withstand the loads during processing.
Q2: How to prevent material damage during bending?
A: Use molds that match the material thickness and ensure that the mold surface is smooth and undamaged, avoiding material damage caused by mold wear or improper usage. Adjust the machine's pressure and speed to accommodate materials of different thicknesses and hardness.
Q3: How to enhance bending accuracy?
A: Maintain the molds in good condition, regularly inspect and replace worn molds. Use a precision backgauge system and ensure machine calibration accuracy. Additionally, proper operational skills and experience are crucial for improving bending accuracy.
Q4: What are the maintenance essentials for bending machines and molds?
A: Regularly clean the machine and molds to prevent dust and impurities from accumulating. Check the lubrication of all moving parts to ensure adequate and appropriate lubrication oil or grease. For molds, inspect for cracks or excessive wear and promptly repair or replace as needed.
Conclusion
Correct mold selection and usage are essential for ensuring the efficient operation of bending machines and product quality. By understanding the different types of molds and their applications, and by paying attention to routine maintenance and proper operational skills, significant improvements in production efficiency can be achieved, while reducing errors and material waste during the production process.
Overview of Bending Mold Types
Bending molds can be categorized into various types based on their shape and function, including:
- L-shaped, R-shaped, U-shaped, and Z-shaped molds: These molds are named according to the shape of the metal sheet after bending and are suitable for producing various specific-shaped products.
- Upper mold angles: The upper mold is designed with different angles, commonly including 90°, 88°, 45°, 30°, and 20°, to accommodate different bending requirements.
- Double-groove and single-groove lower molds: Double-groove molds are suitable for materials of various thicknesses, while single-groove molds are suitable for specific thicknesses.
- Special function molds: Such as flattening molds, R-lower molds, acute angle lower molds, used for special bending operations.
Mold Selection and Utilization
1. Physical Characteristics and Applicability of Molds
Bending molds are typically made of specially heat-treated steel, featuring high hardness, wear resistance, and the ability to withstand high pressure. When selecting molds, the following factors should be considered:
- Mold load-bearing capacity: Each set of molds has its maximum load-bearing capacity. When in use, the appropriate mold length should be selected, and it is strictly prohibited to exceed the maximum pressure indicated for the mold.
- Consistency in mold height: All molds used on the same machine should have the same height to ensure processing accuracy and equipment safety.
- Material hardness, thickness, and length: Choose suitable upper and lower molds based on these physical characteristics of the metal sheet to ensure bending quality and efficiency.
2. Bending Special Shapes and Angles
- Sharp and dead-angle bending: When performing sharp or dead-angle bending, molds with angles above 30° should be selected, first bending the sharp angle, then pressing the dead angle.
- R-angle bending: Special R upper and lower molds should be used for precise curvature when bending R-angles.
- Bending long workpieces: When bending longer workpieces, it is advisable to avoid using segmented molds to reduce pressure marks at the seams. Additionally, choose single-groove lower molds to enhance overall bending integrity.
FAQ
Q1: How to choose suitable bending molds?
A: Firstly, determine the mold type based on material thickness, length, and the expected bending shape. Secondly, consider the hardness and load-bearing capacity of the mold to ensure that the selected mold can withstand the loads during processing.
Q2: How to prevent material damage during bending?
A: Use molds that match the material thickness and ensure that the mold surface is smooth and undamaged, avoiding material damage caused by mold wear or improper usage. Adjust the machine's pressure and speed to accommodate materials of different thicknesses and hardness.
Q3: How to enhance bending accuracy?
A: Maintain the molds in good condition, regularly inspect and replace worn molds. Use a precision backgauge system and ensure machine calibration accuracy. Additionally, proper operational skills and experience are crucial for improving bending accuracy.
Q4: What are the maintenance essentials for bending machines and molds?
A: Regularly clean the machine and molds to prevent dust and impurities from accumulating. Check the lubrication of all moving parts to ensure adequate and appropriate lubrication oil or grease. For molds, inspect for cracks or excessive wear and promptly repair or replace as needed.
Conclusion
Correct mold selection and usage are essential for ensuring the efficient operation of bending machines and product quality. By understanding the different types of molds and their applications, and by paying attention to routine maintenance and proper operational skills, significant improvements in production efficiency can be achieved, while reducing errors and material waste during the production process.
