Views: 0 Author: Site Editor Publish Time: 2024-11-29 Origin: Site
Manual Bending:
Operation Method: The handle of the bending machine is manually operated to apply force, gradually bending the copper tube around the die. The operator controls the degree of bending based on experience and visual observation according to the required bending angle.
Applicable Scenarios: It is generally applicable to the bending operations of copper tubes with small batches, relatively low precision requirements, and small diameters. For example, in the repair site of some small refrigeration equipment, the manual bending method may be adopted when making simple bending adjustments to individual copper tubes.
Hydraulic Bending:
Principle: The powerful pressure generated by the hydraulic system is used to push the bending die, causing the copper tube to be bent according to the set shape and angle under the action of the die. The hydraulic system can provide a stable and relatively large force to ensure the smooth progress of the bending process.
Advantages: It can bend copper tubes with larger diameters and thicker wall thicknesses, and the bending precision is relatively high. In the refrigeration industry, when a large number of copper tubes need to be bent more precisely in the mass production of refrigeration units and other equipment, hydraulic bending machines are widely used.
CNC Bending:
Workflow: The operator first inputs the relevant parameters of the copper tube (such as diameter, wall thickness, bending angle, bending radius, etc.) into the CNC system. The CNC bending machine automatically controls the movement trajectory and action sequence of the bending die according to the preset program to precisely perform the bending operation on the copper tube.
Characteristics: The bending precision is extremely high, and it can realize complex bending shapes and multi-segment continuous bending. In the refrigeration industry, for some high-end refrigeration equipment, such as precision air conditioners, the internal layout of copper tubes is complex, and strict requirements are placed on the bending precision and shape. Therefore, CNC bending machines become the first choice.
Preparation of Copper Tubes:
Cutting: According to the design requirements of the refrigeration system, the copper tube is cut into an appropriate length by using copper tube cutting equipment. When cutting, it is necessary to ensure that the cut surface is flat and perpendicular, and avoid burrs or inclined cuts, otherwise it will affect the subsequent bending quality and the sealing performance of the copper tube connection.
Cleaning: The cut copper tube needs to be cleaned to remove impurities such as oil, dust, and oxides on the surface. Special copper tube cleaners or alcohol can be used for wiping to ensure that the surface of the copper tube is clean and tidy, so that it can better fit with the bending die, and also prevent the impurities from scratching the copper tube during the bending process.
Selection and Installation of Dies:
Die Matching: Appropriate bending dies are selected according to the diameter and wall thickness of the copper tube. The inner diameter of the die should match the outer diameter of the copper tube closely, and generally the tolerance should be within a reasonable range to ensure that the copper tube can be evenly stressed during the bending process and avoid problems such as excessive local deformation or unsmooth bending.
Installation and Debugging: The selected bending die is correctly installed on the bending machine and debugged. Check whether the installation of the die is firm and whether the moving parts are flexible to ensure that the die can accurately run according to the predetermined trajectory during the bending process.
Bending Operation:
Parameter Setting (Applicable to CNC Bending Machines): For CNC bending machines, before bending, various parameters of the copper tube should be accurately set, such as the diameter, wall thickness, bending angle, bending radius, etc., as well as process parameters such as bending speed and pressure. These parameter settings directly affect the bending quality and precision of the copper tube.
Starting Bending: Start the bending machine. Whether it is a manual, hydraulic or CNC bending machine, the state of the copper tube should be closely monitored during the bending process. For manual bending machines, the operator should apply force evenly and slowly bend according to the predetermined angle; for hydraulic bending machines, it is necessary to ensure that the hydraulic system pressure is stable; for CNC bending machines, the bending progress and the state of the copper tube can be viewed in real time through the monitoring system.
Post-bending Treatment:
Quality Inspection: After the bending is completed, the bending quality of the copper tube is immediately inspected. The main inspection items include whether the bending angle meets the design requirements and whether there are obvious deformations, wrinkles or cracks and other defects at the bending place. If quality problems are found, measures should be taken in time to repair or re-bend.
Shaping (if Necessary): If there are slight deformations or unevenness at the bending place, a special shaping tool can be used to shape it so that the copper tube returns to a more ideal shape to ensure that it can be normally installed and used in the refrigeration system.
Marking (Optional): In some cases, in order to facilitate the identification and positioning of the copper tube during the assembly process of the refrigeration system, appropriate markings can be made on the bent copper tube to indicate information such as its affiliated part and bending angle.
