Telecurso 2000 - Manutenção - 15 Desmontagem

Soluções Bmalbert

19 Jul 201112:42

Summary

TLDRThis instructional video script focuses on the proper procedures for disassembling and maintaining machinery. It emphasizes the importance of following a sequence to avoid accidents and inefficiency, starting with disconnecting electrical circuits, removing external parts, and cleaning the machine. The script also highlights the use of desoxidants for rusted bolts and the correct order for loosening them, as well as the necessity of identifying component positions before removal. Finally, it touches on washing parts and categorizing them for reconditioning or replacement, setting the stage for a future lesson on reassembling mechanical sets.

Takeaways

🔧 The importance of following a proper sequence when disassembling machinery to facilitate work and prevent accidents.
🛠️ Disassembling equipment hastily can lead to wasted time and effort, as demonstrated by the character Caio who had to reassemble the entire machine to find the fault.
👷‍♂️ The necessity of understanding the problem before disassembling a machine, based on the operator's report, maintenance records, and control instrument tests.
💡 The process of disassembling should begin by disconnecting electrical circuits and removing external parts made of plastic, rubber, or leather to ensure safety.
🧼 Cleaning the machine before removing electrical circuits, levers, hoses, and tubes to prevent contamination and accidents.
🔩 The use of desoxidants on screws before removal to prevent them from being stuck due to oxidation, and the alternative method of using a welding torch if needed.
🔧 The order of unscrewing should follow the same sequence used when they were tightened, which can be found in a tightening sequence table.
📐 Identifying the position of components before removal is crucial for correct reassembly, even with manuals and sketches.
🚿 Washing parts with kerosene after disassembly is essential to reveal defects or wear, using a washing machine and stiff brushes.
🔬 After washing and drying, parts should be sorted into batches according to their condition: perfect, needing reconditioning, damaged to be replaced, or needing laboratory examination.
🔄 The script emphasizes the importance of a systematic approach to machine maintenance, including disassembly, cleaning, and sorting parts for further action.

Q & A

What is the main topic of the 15th teleclass in the professional course?
-The main topic of the 15th teleclass is the proper sequence and procedures for disassembling machinery and equipment.
Why did Caio make a mistake in the script?
-Caio made a mistake by disassembling the machine hastily without first identifying the cause of the malfunction, which resulted in wasted time and effort.
What is the importance of following the correct disassembly sequence?
-Following the correct disassembly sequence facilitates the work, prevents accidents, and ensures that the machine can be reassembled correctly.
What should be done before disassembling a machine?
-Before disassembling a machine, one should analyze the problem based on the operator's report, maintenance records, and conduct tests with control instruments to identify the malfunction.
What is the first step in the disassembly process according to the script?
-The first step in the disassembly process is to disconnect the electrical circuits to prevent accidental activation of the machine.
Why is it necessary to remove external parts made of plastic, rubber, or leather before cleaning the machine?
-Removing external parts made of plastic, rubber, or leather before cleaning helps to prevent contamination of important components during the preliminary cleaning of the machine.
What is the purpose of draining lubricants during the disassembly process?
-Draining lubricants prevents oil from spilling on the floor or workbench, which could cause accidents.
Why is it important to use desoxidants on screws before removing them?
-Desoxidants are used to break the oxidation binding on screws, making them easier to remove and preventing damage to the machine components.
What should be done if desoxidants are not enough to remove a screw?
-If desoxidants are not enough to remove a screw, one can use a oxy-acetylene welding torch to heat the screw, which will help loosen it.
How should screws be removed if they are stuck due to oxidation?
-If screws are stuck due to oxidation, they should be heated with an oxy-acetylene welding torch to loosen them before attempting to remove them.
What is the final step described in the script for the disassembly process?
-The final step described in the script for the disassembly process is to wash the parts with kerosene, dry them, and then separate them into different lots based on their condition.

Outlines

00:00

🔧 Proper Equipment Disassembly Techniques

This paragraph introduces a professional training module with 35 lessons, focusing on the importance of following correct disassembly procedures for machinery. It narrates a scenario where a character named Caio hastily disassembles a machine without identifying the fault, leading to wasted time and effort. The summary emphasizes the need for a systematic approach to disassembly, including analyzing the machine's maintenance log, conducting control instrument tests, and following a sequence to prevent accidents and facilitate reassembly. The paragraph also highlights the importance of not hastily disassembling machinery without proper analysis.

05:02

🛠 Sequential Disassembly and Cleaning of Machinery

The second paragraph delves into the detailed steps of machinery disassembly, starting with disconnecting electrical circuits and removing external components. It explains the rationale behind each step, such as preventing accidental activation and contamination. The use of desoxidants and a oxy-acetylene torch for stubborn bolts is discussed, along with the method of applying pressure in a specific sequence to avoid warping parts. The paragraph also covers the importance of identifying the position of components before removal and the process of washing parts with kerosene to reveal defects, using a washing machine and stiff brushes to clean and let the excess kerosene drain off.

10:04

🔬 Sorting and Analyzing Disassembled Parts

The final paragraph discusses the process of sorting and analyzing disassembled parts into different batches based on their condition. It outlines the categorization into perfect parts, parts needing reconditioning, damaged parts to be replaced, and parts requiring laboratory examination. The paragraph concludes with a preview of the next lesson, which will cover the assembly of mechanical sets, emphasizing the importance of a thorough review and understanding of the disassembly process before moving on to reassembly.

Mindmap

Keywords

💡Maintenance

Maintenance refers to the process of preserving or restoring equipment, machinery, or systems to a state of efficiency and effectiveness. In the video, the theme revolves around the proper maintenance procedures for disassembling and troubleshooting machinery, emphasizing the importance of following a sequence to avoid accidents and ensure efficiency.

💡Disassembly

Disassembly is the process of taking apart a machine or device into its components. The video script highlights the need for a systematic approach to disassembly, including the order of removing parts and the importance of identifying the position of components before removal, to facilitate reassembly and troubleshooting.

💡Procedure

A procedure is a set of established or official ways of doing something. The script underscores the necessity of adhering to a proper sequence of procedures during disassembly to prevent damage to the machine and to streamline the process of identifying faults.

💡Troubleshooting

Troubleshooting is the process of identifying and resolving problems. In the context of the video, troubleshooting involves analyzing the machine's maintenance log, conducting tests with control instruments, and carefully disassembling the machine to find the root cause of a malfunction.

💡Component

A component is an individual part of a larger system or mechanism. The script mentions the importance of identifying the position of each component before its removal, which is crucial for proper reassembly and understanding the machine's operation.

💡Lubrication

Lubrication is the process of applying substances to reduce friction between surfaces in mutual contact, typically in a machine. The video script discusses the need to drain lubricants to prevent accidents and contamination during the disassembly process.

💡Safety

Safety refers to the condition of being protected from harm or other non-desirable outcomes. The script emphasizes safety measures, such as turning off electrical circuits and removing external parts made of plastic, rubber, or leather, to prevent accidents during disassembly.

💡Efficiency

Efficiency is the quality of performing without wasting material, time, or energy. The video stresses the importance of following a logical sequence of disassembly to ensure the process is efficient and minimizes downtime for production.

💡Reassembly

Reassembly is the process of putting back together the components of a machine or device after disassembly. The script implies that understanding the correct sequence of disassembly is crucial for successful and efficient reassembly.

💡Desoxidant

A desoxidant is a substance used to remove or prevent oxidation, particularly on metal surfaces. In the script, desoxidants are mentioned as a solution to loosen oxidized screws during the disassembly process, facilitating the removal of components.

💡Washing

Washing in the context of the video refers to the cleaning of machine parts after disassembly, typically using a solvent like kerosene. The script explains that washing parts is important to reveal defects or wear that may not be visible before cleaning.

Highlights

Introduction to the 15th lesson of a 35-lesson professional course on equipment maintenance.

The importance of following proper disassembly techniques to avoid wasting time and causing further damage to equipment.

A demonstration of a common mistake made by disassembling equipment without identifying the cause of the malfunction first.

The necessity of a systematic approach to disassembling machinery to facilitate work and prevent accidents.

The correct sequence for disassembling a machine, including disconnecting electrical circuits and removing external parts.

The importance of cleaning equipment before removing electrical circuits to prevent contamination.

How to properly remove electrical circuits, levers, hoses, and tubes without forgetting to tag components.

The logic behind the order of disassembly to ensure the machine's functionality after reassembly.

The use of desiccants to prevent rusting of bolts and the application of heat if desiccants are not effective.

The method of using a oxy-acetylene torch to loosen stuck bolts.

The importance of following the correct sequence when loosening bolts, as indicated by a tightening sequence chart.

How to identify the position of components before removal to ensure proper reassembly.

The process of washing machine parts with kerosene to reveal defects or wear.

The use of compressed air to dry parts after washing with kerosene.

Categorizing cleaned parts into lots based on their condition for further action.

The next steps in the maintenance process, including addressing defects and preparing for reassembly.

A summary of the lesson's key points, emphasizing the importance of procedure in machine disassembly and reassembly.

A preview of the next lesson, which will cover the assembly of mechanical sets.

The conclusion of the Telecourse 2000 program, a collaboration between Fiesp's education system and the Roberto Marinho Foundation.