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การทำความสะอาดด้วยเลเซอร์ การทำความสะอาดด้วยเลเซอร์ (LASER CLEANING SYSTEM) คือ การใช้แสงเลเซอร์พลังงานสูง ยิงไปที่ผิวชิ้นงานที่ต้องการทำความสะอาด ทำให้คราบสิ่งสกปรก เช่น สนิม สี คราบน้ำมัน ตะกรัน เกิดการระเหยหรือระเหิด จนหลุดออกจากพื้นผิวด้วยลำแสงความเข้มข้นสูงหรือความร้อนที่เกิดจากแสงเลเซอร์ โดยวิธีการนี้จะส่งผลกระทบต่อผิวชิ้นงานที่อยู่ใต้คราบสิ่งสกปรกน้อยมาก เหตุเพราะคราบสิ่งสกปรกหรือสนิมจะแยกตัวออกในระดับโมเลกุล อีกทั้งลำแสงมีพลังงานไม่มากพอที่จะทำให้ผิวชิ้นงานที่อยู่ใต้คราบสิ่งสกปรกเกิดการเปลี่ยนแปลงทางคุณสมบัติไปจากเดิม วิธีการทำความสะอาดด้วยเลเซอร์ เป็นวิธีที่ไม่มีการสัมผัสกับผิวชิ้นงาน อีกทั้งสามารถนำไปใช้กับวัสดุได้หลากหลาย มีความแม่นยำ สะดวก รวดเร็ว ปลอดภัย ใช้งานง่าย และมีต้นทุนต่ำ เพราะไม่มีวัสดุสิ้นเปลือง การเตรียมการใช้เวลาน้อยกว่า อีกทั้งเป็นมิตรต่อสิ่งแวดล้อม เพราะไม่ต้องใช้สารเคมี กรด หรือตัวทำละลาย เศษสิ่งสกปรกรวบรวมเก็บได้ง่ายกว่า เกิดมลภาวะน้อยกว่า หรือไม่ก่อเกิดมลภาวะเลยหากเป็นระบบปิด ปัจจุบันนี้การทำความสะอาดด้วยเลเซอร์มีให้เลือกใช้ตามความเหมาะสม ทั้งแบบเคลื่อนที่ได้ (Portable) และแบบติดตั้งอยู่กับที่ (Workstation)
หากท่านสนใจข้อมูลเพิ่มเติมเกี่ยวกับการทำความสะอาดด้วยเลเซอร์ (LASER CLEANING SYSTEM) กรุณาติดต่อ [email protected] หรือเยี่ยม website ได้ที่ http://www.tsasia.co.th
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Traceability in manufacturing has been commonplace within the aerospace industry for decades Advances in relatively inexpensive technology with greater networking capabilities are now being exploited throughout the supply chain to ensure reliability and identification of root causes to potential problems. Companies producing even the smallest components are benefitting from increasingly accessible technologies used for marking and tracking components, previously only a feature of manufacturing practices at the very top of the supply chain.  Dot Peen Marking Marking and traceability technologies are becoming accessible to wider supply chains as digital technologies allow manufacturers of all sizes and production scales to implement Industry 4.0 solutions within their factories. The traceability process begins with marking and coding equipment. Effective marking is central to any successful traceability system; if parts cannot be distinguished it is simply not possible to track them. Whilst traditional methods of tagging parts such as with an adhesive label or a human-readable code are widely used and serve their purpose well, they are not truly permanent and come with their faults. A permanent machine readable code or 2D data matrix code, which stores vital data and can be scanned at any point during the life of the part, can quickly and easily be applied directly to a component, by dot peen, scribe or laser marking.  Dot peen is the most common and low-cost method of permanent marking, usually used on metal. It uses a stylus pin that is fired into the marking surface to make an indented dot. By rapidly repeating this and moving the stylus between each dot, writing and images can be applied. Dot peen marking provides fast, accurate, low-stress marking and can mark through coatings or film on the material surface. Dot peen is the preferred marking method by aerospace manufacturers, favoring the low-stress engraving style whereby material is displaced rather than removed, significantly reducing stress to the component being marked. Dot peen marking machines use an electrically driven solenoid to actuate the stylus, but pneumatic actuation can also be used for deep marking or faster marking.  Scribe marking is traditionally the preferred method for automotive VIN marking where a pneumatically-driven pin is driven into the metal surface to be marked. It is then moved through the metal, giving a continuous engraved line to produce the required inscription. Scribe machines are able to produce quality inscriptions with excellent clarity and legibility as part of a very low noise operation. Laser marking is rapidly becoming the permanent marking method of choice for the growing number of manufacturers introducing traceability within their operations. Laser marking is fast, accurate and high-contrast. This marking method is capable of producing a 2D data matrix code in less than a second, either on a static component or on a fast-moving production line, making it ideally suited to high volume and high variety output. Laser is a non-contact form of marking so avoids creating stress points or deforming the material during the marking process. Non-contact avoids the need to clamp the component being marked, providing the added benefit of safe and easy set up for operators  Traceability offers significant advantages to production engineers tasked with analyzing events that may have ultimately led to a product recall. By tracking individual parts and storing a variety of production related parameters, it is possible to identify exactly how, when and where a problem occurred at the earliest opportunity. Speedy identification spots issues before they turn into major problems and could also mean the difference between recalling an entire month’s production and simply changing individual faulty parts. Designed and manufactured in Sheffield, Pryor’s traceability systems offer a single source supply for permanent part identification, data capture, process control and production monitoring To find out more about:
To find out more Pryor's permanent part identification, data capture, process control and production monitoring
 AS9132 is a specification for the Direct Part Marking of aerospace components. For a Data Matrix code marked on a component for identification purposes, the standard measures dot size, angle of distortion and dot centre offset. The standard generally just considers a Pass/Fail of the mark against the criteria.
A Useful Feedback Loop AS9132 provides useful feedback as to why a Data Matrix code has failed a verification check. When the Pryor verification software detects a failed code it will provide the user with a relevant list of things to check to correct the problem. Some tips on how to achieve a Pass grade in AS9132 are given in this article. How to achieve Pass grades on AS9132 marksFor more information on what AS9132 is, see this article. Pryor Dot Peen marking machines, when used with the head mounted VeriSmart 2.0 camera for the verification check, are capable of getting pass grades at AS9132. The BenchDot range of machines provide the highest quality Dot Peen marks in the world and can achieve better marks over a longer period of time. This is due to the high precision x-y movement of the machines. While competitor products can also achieve Pass grades, they may not do so at high speeds or for longer periods of usage. It is important to remember that a verification check of a Data Matrix needs to happen in a controlled environment. In order to assess the quality of the mark, the imaging process needs to be repeatable - otherwise the same mark can give different verification results; for example, different lighting conditions could make the difference between a pass and fail grade. In order to ensure a consistent verification process, a machine-mounted camera should be used immediately after the mark has been made. The AS9132 specification assess 3 criteria of a Data Matrix mark. It requires all 3 to give a Pass grade. 1. Dot size needs to be between 65% and 105% 2. Dot centre offset within 0% to 20% of the ideal grid 3. Angle of distortion up to 6 degrees variation of the L shaped finder pattern. Dot Size If the verification check on the Data Matrix fails because the dot size is too big, then the marking force is too high and needs to be reduced. This can be done in the Pryor embedded controller, Pryor Windows based software or by adjusting the gap betweent he component and the marking pin (a larger gap gives higher force). Dot Centre Offset If it fails for dot centre offset then the fixture is not good enough to clamp the part in place or the marking head has play and needs a service For further information about AS9132 please visit CONTACT
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AuthorJackrapong Siripaiboon Archives
July 2022
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