彩涂板有哪些加工特性

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由于彩涂板表面涂层的存在，彩涂板与普通冷氧板、镀锌板在成形过程中存在着许多差异。鉴于 彩涂板的某些力学性能（如屈服强度、延伸率）和某些涂层性能（如铅笔硬度、T形弯曲值、冲击功）对成形过程的影响，应引起足够的重视。.后处理时应注意以下事项：

（1）当零件形状复杂，变形程度大时，应采用多道次成形。如果一次形成，涂层的粘附力可能因过度变形而破坏。

（2）应根据模具形状、变形特点和工艺条件设置适当的间隙。设置间隙时应考虑涂层厚度。

（3）大部分涂层可用作固体润滑剂，满足大多数成型工艺的润滑要求。某些涂料通过调整配方可以提高涂料的润滑性。如果涂层的润滑性不足，可以通过涂抹油、蜡和可剥保护膜来改善润滑性。但应注意的是，润湿剂溶剂容易吸附污垢，安装前应将其清除，可剥离的保护膜应在加工后尽快清除。

（4）根据设备情况、工艺条件、零件形状等因素，设定合理的加工速度。变形速度过快容易导致涂层剥落。当温度较低时，涂层的柔韧性降低，应避免低温加工。如果环境温度较低，材料在加工前应预热到一定温度。

（5）加工过程中产生的切口易腐蚀，应采取必要的防护措施，如涂防护涂层、插入橡胶密封件等。

（6）应尽量减少切割面上的毛刺，以防止毛刺划伤表面。

（7）所有与涂层接触的表面应保持清洁整齐，加工过程中产生的碎屑和金属颗粒应及时清理，防止异物损坏涂层表面。

（8）加工时应尽量减少成型辊辊面或模面磨损，保持接触面清洁，防止涂层表面出现压痕、划痕等缺陷。

（9）尽量采用工厂预装配后现场安装的施工方法，并采取保护措施，防止安装过程中涂层损坏。

（10）如果在加工过程中涂层表面受损，应及时使用特殊修补涂层，以防止受损区域发生腐蚀。

Because of the coating on the surface of color coated sheet, there are many differences between color coated sheet and ordinary cold oxygen sheet and galvanized sheet in forming process. In view of the influence of some mechanical properties (such as yield strength, elongation) and some coating properties (such as pencil hardness, T-bending value, impact work) of color coated sheet on forming process, enough attention should be paid to this. 。 The following items should be paid attention to in post-processing:

(1) When the shape of parts is complex and the degree of deformation is large, multi-pass forming should be adopted. If formed at one time, the adhesion of the coating may be destroyed due to excessive deformation.

(2) Appropriate clearance should be set according to die shape, deformation characteristics and process conditions. The thickness of coating should be taken into account when setting clearance.

(3) Most coatings can be used as solid lubricants and meet the lubrication requirements of most forming processes. Some coatings can improve the lubricity of coatings by adjusting the formulation. If the lubricity of the coating is insufficient, the lubricity can be improved by applying oil, wax and peelable protective film. However, it should be noted that wetting agent solvents are easy to absorb dirt, should be removed before installation, and peelable protective film should be removed as soon as possible after processing.

(4) Reasonable processing speed should be set according to the condition of equipment, process conditions, shape of parts and other factors. Excessive deformation speed can easily lead to coating peeling. When the temperature is low, the flexibility of the coating decreases, so low temperature processing should be avoided. If the ambient temperature is low, the material should be preheated to a certain temperature before processing.

(5) The incision section produced during processing is prone to corrosion, so necessary protective measures should be taken, such as coating protective coatings, inserting rubber seals, etc.

(6) The burrs on the cut surface should be minimized to prevent the burrs from scratching the surface.

(7) All surfaces in contact with the coating should be kept clean and tidy, and the chips and metal particles generated during processing should be cleaned in time to prevent foreign bodies from damaging the coating surface.

(8) When processing, the wear of roll surface or die surface of forming roll should be minimized, the contact surface should be kept clean, and the defects such as indentation and scratch on the coating surface should be prevented.

(9) As far as possible, the construction method of factory pre-assembly and then on-site installation should be adopted, and protective measures should be taken to prevent damage to the coating during installation.

(10) If the surface of the coating is damaged during processing, special repairing coatings should be used in time to prevent corrosion at the damaged areas.