Introduction to Welding Engineering
Introduction to Welding Engineering
In this presentation, the speaker introduces the field of welding engineering and discusses various aspects related to manufacturing, joining techniques, and the selection of joints. The comparison of welding with other manufacturing processes is also explored, along with the advantages and limitations of welding processes.
Manufacturing Processes and Joint Selection
- Different manufacturing processes are used to develop engineering components.
- Joints are necessary for developing a variety of engineering components.
- Various types of joints are available for different situations.
- The selection of a suitable joint depends on the desired performance.
Comparison with Other Manufacturing Processes
- Welding is one among several manufacturing processes used for developing components.
- Casting, forming, machining, and welding are examples of different manufacturing processes.
- Selecting the appropriate welding process for a specific situation is important.
Advantages and Limitations of Welding Processes
- The advantages and limitations of welding processes will be discussed.
- Applications of welding in specific sectors will be provided as examples.
Manufacturing Components and Engineering Systems
- Components used in daily life are made from different materials, sizes, and shapes.
- Various manufacturing processes are employed to manufacture these components.
- Sizing raw materials into desired sizes is an essential part of manufacturing.
Imparting Desired Properties to Materials
- After sizing and shaping raw materials into desired components, properties need to be imparted.
- Manufacturing processes help achieve the desired combination of properties in components.
- Surface engineering and heat treatment techniques play a role in imparting properties.
Example: Car Manufacturing
- Cars utilize various manufacturing processes and materials for different components.
- Wheels may be made from aluminum alloys through casting while sheets form the car body using forming processes.
- Engine parts like valves and pistons can be made from cast iron or aluminum alloys using machining processes.
Importance of Joining in Car Component Development
- Joining processes are extensively used in the development of car components.
- Spot welding is commonly used, with thousands of spot weld joints in a car body.
- Challenges arise when welding GI sheets for car bodies due to electrode life and joint development difficulties.
Enhancing Component Properties
- Components made through machining, welding, forming, or casting can have their properties improved.
- Heat treatment is often applied to enhance wear resistance and hardness in components like piston rings.
- Wheels made from aluminum alloys may also undergo heat treatment for improved properties.
Conclusion
The speaker concludes by emphasizing the importance of selecting suitable manufacturing processes and joining techniques based on specific requirements. The role of imparting desired properties to materials is highlighted as crucial for successful performance of engineering components.
New Section
This section discusses the classification of manufacturing processes based on the way shape is obtained.
Classification of Manufacturing Processes
- Positive, negative, and zero processes are used to classify manufacturing processes based on how shape is obtained.
- Casting and forming are examples of zero processes where material is shifted to achieve desired size and shape.
- Machining is a negative process where unwanted material is removed from bulk material to obtain desired size and shape.
- Welding and allied processes involve joining simple components together, making them positive processes.
New Section
This section highlights the development of various manufacturing processes based on the processing of bulk material.
Development of Manufacturing Processes
- Over time, a variety of manufacturing processes have been developed to meet different size and shape requirements.
- Simple shapes can be obtained through forming processes, while complex geometries require machining or casting processes.
- The selection of a manufacturing process depends on the properties (physical, mechanical, chemical) of the raw material being used.
- Material properties like melting point and thermal expansion coefficient influence process selection. For example, materials with low melting points are suitable for casting.
New Section
This section discusses how material properties influence the selection and development of manufacturing processes.
Influence of Material Properties
- Chemical properties such as reactivity with environmental gases impact process selection. Special welding processes like gas tungsten arc welding are developed for reactive metals like aluminum and titanium.
- Corrosion behavior also affects process selection; materials sensitive to corrosion require specific manufacturing processes.
- Mechanical properties like yield strength and hardness influence the development of advanced manufacturing techniques. High-strength materials may pose challenges for conventional machining processes.
New Section
This section emphasizes how dimensional properties of components dictate the selection of manufacturing processes.
Dimensional Properties and Process Selection
- The dimensional properties of components, such as tolerance, size, surface finish, and accuracy, impact process selection.
- Manufacturing processes are developed to meet specific requirements, such as drilling deep holes or achieving high depth-to-diameter ratios.
- The selection of a manufacturing process should be based on the complexity of geometry and other component-specific conditions. A systematic approach is necessary for process selection.
New Section
The selection of a manufacturing process is influenced by the complexity of the component, number of units to be produced, and properties of the material.
Factors Affecting Manufacturing Process Selection
- The complexity of the component affects the choice of manufacturing process. Casting and machining are suitable for complex geometries, while welding and forming processes are used for simpler shapes.
- The number of units to be produced determines the manufacturing process selection. Low-volume production may involve simpler systems with low production rates and more manual work, such as sand casting. For large numbers of components, die-casting and mechanized casting processes are preferred.
- Properties of the material, including physical, chemical, and mechanical properties, must be considered when selecting a manufacturing process. Melting point is important for welding and casting processes, chemical properties influence welding and forming processes, while mechanical properties like strength and ductility are crucial for machining and forming processes.
New Section
The number of components to be produced significantly impacts the selection of a manufacturing process.
Impact of Number of Components on Manufacturing Process Selection
- For few components, simpler processes with lower investment costs can be chosen. Sand mould casting can be used for small quantities. However, high-volume production requires higher investments in processes like pressure die casting or mechanized casting.
- High-volume production is preferred when large numbers of components need to be manufactured. While sand mould casting can produce a few components easily, pressure die casting and other mechanized casting processes are desired for large volumes.
New Section
Material properties and dimensional requirements also play a role in selecting the manufacturing process.
Material Properties and Dimensional Requirements
- The properties of the material being processed significantly influence the selection of a manufacturing process. Physical, chemical, and mechanical properties are considered, along with dimensional properties desired in the component.
- The size of the component affects the choice of manufacturing process. Machining or casting processes may be suitable for small or large components respectively. Surface finish, dimensional accuracy, and tolerance requirements also impact process selection.
New Section
Different manufacturing processes have different capabilities and limitations.
Capabilities and Limitations of Manufacturing Processes
- Machining offers excellent tolerance, close control over dimensions, and good surface finish. Casting and forming processes do not provide as much control over dimensions and finish.
- Most components produced by welding, casting, or forming require final machining to achieve desired size and shape for various engineering applications.
New Section
Casting involves shifting material using heat and pressure, while machining is a subtractive process.
Casting Process
- Casting is a simple and fast method for obtaining desired products. It can be used to make components of simple shapes (e.g., rectangles) to complex shapes like cylinder blocks or heads. Sizes can range from small to large dimensions.
- In casting, heat is applied to convert raw material into molten form before pouring it into a mold to obtain the desired size and shape upon solidification. Solidification can occur under normal gravity conditions or under external pressure conditions. Heat and pressure are used singly or in combination to shift material from one zone to another in a controlled manner for achieving desired finished products with specific tolerances.
New Section
Machining is a subtractive process that removes unwanted material.
Machining Process
- Machining is considered a negative process as it involves removing unwanted material from the bulk material to obtain the desired size and shape. Material removal occurs in the form of small chips, which cannot be used for other purposes and result in loss of metal worth. The removed material can be recycled through re-melting.
New Section
Zero processes involve shifting material without adding or removing it.
Zero Processes: Casting and Forming
- Casting and forming processes involve shifting material from one zone to another using heat and pressure. Material is deformed plastically under pressure in forming processes, with or without applying heat. Casting involves heating raw material to molten form before pouring it into a mold for solidification. Heat and pressure are used singly or in combination to achieve desired size and shape in a controlled manner.
New Section
The selection of manufacturing process depends on factors like complexity, number of components, properties of the material, dimensional requirements, surface finish, tolerance, etc.
Considerations for Manufacturing Process Selection
- The selection of a manufacturing process depends on various factors such as component complexity, number of components to be produced, properties of the material (physical, chemical, mechanical), dimensional requirements, surface finish desired, and tolerance specifications.
- Different processes have different capabilities and limitations regarding tolerances, dimensions control, surface finish quality, etc. Machining offers high precision but may require additional steps after welding or casting processes to achieve desired size and shape.
New Section
This section provides an overview of the basic steps involved in casting and the process of filling the cavity with molten metal.
Casting Process
- The first step in casting is to develop a cavity that corresponds to the shape of the component to be manufactured. This involves making the cavity of the desired size and shape.
- The material for the component is brought to a molten state by melting it using an external heating source such as a pit furnace, induction furnace, or electrical resistance furnace.
- Once melted, the material is poured into the mold of the desired size and shape. Care is taken during pouring to avoid unnecessary turbulence in the mold.
- After pouring, solidification of the molten metal takes place. Once solidification is complete, the cast component is obtained by removing it from the mold.
- The casting is then cleaned to remove any excess material left over on surfaces such as fins and parting lines. Finishing can also be done using a fettling process.
- Finally, inspection is conducted to check for any defects or ensure integrity of the cast component.
New Section
This section illustrates schematically how casting occurs, starting from bringing raw material to a molten state and pouring it into a mold.
Casting Process Illustrated
- Raw material in the form of an ingot is brought to a molten state using a suitable furnace.
- The molten metal is transferred from a ladle into a mold carefully so that it fills up the entire cavity.
- Once solidification is complete, the mold is removed and the casting is obtained.
New Section
This section explains forming as another manufacturing process involving plastic deformation of bulk materials.
Forming Process
- Forming involves shifting material from one zone to another through plastic deformation.
- Compressive, shear, and tensile forces are used to plastically deform the material and achieve the desired size and shape.
- Formed components are generally stronger than those manufactured using other processes due to work hardening during plastic deformation.
- Work hardening increases hardness and yield strength but reduces ductility of the metal.
New Section
This section discusses rolling as a forming process where metal is passed through rollers to reduce thickness.
Rolling Process
- Rolling is a positive process where metal is forced to pass through rollers, resulting in a reduction in thickness while maintaining width.
- The process mainly focuses on reducing thickness by a small amount.
New Section
This section explains machining as a subtractive process used to remove surplus material and obtain the desired size, shape, and finish.
Machining Process
- Machining involves removing unnecessary extra material from the raw material using machine tools.
- Relative motion between the workpiece and the tool is provided by machine tools to achieve the desired size, shape, and finish by removing unwanted material in the form of chips.
- Rigidity of the work holding device and tool is crucial for maintaining relative positions accurately.
- Relative motion speed between the tool and work material affects accuracy and finish.
New Section
This section introduces joining as a positive process where simpler shaped components are joined together.
Joining Process
- Joining involves connecting simpler shaped components to obtain the desired size and shape.
New Section
This section discusses different methods of joining components, including brazing, adhesive joining, mechanical joints, fusion welds, spot welding, and soldering. It also highlights the importance of considering metallurgical compatibility and service requirements when selecting a joint method.
Joining Methods
- Brazing and adhesive joining are commonly used for joining components with metallurgical incompatibility. These methods do not involve melting or heating.
- Mechanical joints like nuts and bolts systems offer reliable strength for making assemblies. Fusion welds are used to join pipes by fusing the edges of the components.
- Spot welding is commonly used in the automotive industry to join thin sheets, while soldering is suitable for joining small-sized components like strips and wires.
Categories of Joints
- Joints can be categorized into three types: mechanical joints (using nuts and bolts, clamps, or rivets), adhesives (such as epoxy or resins), and welding (including brazing and soldering). Each type offers specific properties in terms of load carrying capacity.
- Mechanical joints have good load carrying capacity compared to adhesives and welded joints. However, welded joints can have higher strength than the base material itself.
Considerations for Joint Selection
- Reliability is higher for mechanical joints compared to welded joints and adhesives under critical conditions. Welded joints are now being used in critical applications with advancements in welding technology.
- Compatibility of materials to be joined is important; mechanical joints can easily join similar as well as dissimilar metals, while welding poses difficulties when joining dissimilar metals.
- Fitness for use in different environments is another crucial aspect. Adhesives may degrade rapidly under moisture or chemical conditions, while welded joints may not be suitable for specific metals in certain environments (e.g., stainless steel weld joints in an ammonium environment).
- Efforts required for joint development vary among different types of joints. Mechanical joints are comparatively simpler to develop, while welding requires careful application and expertise.
Joint Selection
- The selection of the appropriate joint type depends on the purpose and desired longevity of the joint. Temporary joints can be made using rivets, nut bolts, or adhesives, while permanent joints can be achieved through welding or soldering.
New Section
This section discusses the importance of selecting suitable joints based on factors such as material compatibility, melting point, thermal expansion coefficient, section size and thickness, service conditions, and loading type.
Factors Affecting Joint Selection
- Similar types of metals are easier to weld, while dissimilar metal systems require brazing, soldering, adhesive or mechanical joints.
- Metallurgical compatibility between the members to be joined is important.
- Metal properties such as melting point and the effect of weld thermal cycle should be considered.
- Section size and thickness play a role in joint selection.
- Thermal expansion coefficient can affect joint performance.
- Service conditions like temperature and corrosive environment impact joint selection.
- Type and magnitude of loading also influence suitable joint selection.
New Section
This section emphasizes the significance of considering service conditions, including temperature, environment, and loading type when selecting a suitable joint. It also mentions that mechanical joints are generally more cost-effective than welded joints.
Considerations for Joint Selection
- Service conditions (temperature, environment) significantly affect joint performance.
- Low temperatures can cause poor ductile behavior and low toughness in welded joints.
- High temperatures can lead to cracking in welded joints and degradation in adhesive joints.
- Welded joints perform poorly under corrosive conditions compared to mechanical joints.
- Loading type (static or dynamic) influences joint performance. Mechanical joints perform better under dynamic loading.
- Economy or cost-effectiveness is an important factor. Mechanical joints are generally cheaper but may increase system weight.
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New Section
This section discusses the different types of weld joints based on the orientation of the plates or members to be joined.
Types of Weld Joints
- Butt Joint: Plates or members are kept in the same plane.
- Single lap joint: Plates are butted together on one side.
- Double lap joint: Plates are butted together on both sides.
- Lap Joint: Plates or members are kept in an overlapping position.
- Edge Joint: Members to be joined are kept almost parallel, and the joint is made along the edge of the plate.
- T Joint: One horizontal plate is kept, and another member is brought vertically to form a T shape.
- Corner Joint: Members to be joined are placed almost at a ninety-degree angle near the edges.
New Section
This section explains how welding differs from other joining techniques like soldering, adhesive joints, and mechanical joints.
Differences from Other Joining Techniques
- Welding involves localized heating of faying surfaces to a molten state, resulting in metallic continuity and weld joints.
- Welding has differential heating and cooling, leading to variations in microstructure, mechanical properties, and residual stresses.
- Residual stresses can be tensile or compressive and can cause distortion and reduced mechanical performance in weld joints.
- Only a portion of the base metal is brought to a molten state during welding, while the rest remains solid at room temperature.
New Section
This section highlights specific characteristics of welding processes such as localized heating, cooling rates, and their effects on microstructure and mechanical properties.
Characteristics of Welding Processes
- Welding involves very localized heating near the faying surfaces, while other areas and the base material remain unheated.
- Cooling rates are highest near the weld or weld center and decrease away from the faying surfaces.
- The differential heating and cooling in welding lead to variations in microstructure, mechanical properties, and residual stresses.
- Residual stresses can be tensile along the length of the weld, causing distortion and reduced fatigue life.
New Section
This section discusses different types of weld joints based on industry requirements and explains how they are developed.
Developing Different Types of Weld Joints
- Butt Joint: Plates to be joined are kept in a horizontal plane, with their faying surfaces melted to create a weld joint.
- Lap Joint: Plates to be joined are kept in an overlapping position, with the end of one plate melted for a single lap joint. Double lap joint has both sides melted.
- T Joint: One horizontal plate is kept, and another member is brought vertically for joint formation using fillet welds.
- Edge Joint: Members to be joined are almost parallel, with angular variation up to five degrees. Weld metal is applied at the edges for joint development.
- Corner Joint: Members to be joined are placed almost at a ninety-degree angle near the edges. Beveling can be done on one or both sides.
New Section
This section explains how welding differs from other joining techniques in terms of localized heating, cooling rates, microstructure variations, and residual stresses.
Differences from Other Joining Techniques
- Welding involves very localized heating near faying surfaces while other areas remain unheated.
- Cooling rates vary with distance from faying surfaces and result in differential expansion/contraction leading to residual stresses.
- Residual stresses in welding can cause distortion, reduced mechanical performance, and increased cracking tendency.
- Partial melting of the base metal is a unique feature of welding not found in adhesive or mechanical joints.
New Section
This section discusses the special nature of welding processes, including differential heating and cooling, residual stresses, and their effects on weld joint performance.
Special Nature of Welding Processes
- Welding involves differential heating and cooling, resulting in variations in microstructure, mechanical properties, and residual stresses.
- Residual stresses can be tensile or compressive and lead to distortion and reduced mechanical performance.
- Tensile residual stresses increase the cracking tendency of weld joints.
- Only a portion of the base metal is brought to a molten state during welding while the rest remains solid at room temperature.
New Section
This section explains how welding differs from other joining techniques in terms of partial melting of the base metal and temperature variations during heating and cooling.
Differences from Other Joining Techniques
- Welding involves partial melting of the base metal while other joining techniques do not.
- Temperature during heating and cooling varies as a function of time, with rapid changes near faying surfaces and weld center.
- Differential expansion/contraction due to temperature variations leads to residual stresses in different areas of the weld joint.
New Section
This section discusses the performance and behavior of weld joints in different directions, as well as the comparison of welding with other joining processes. It also mentions the reliability and usage of weld joints in critical applications.
Weld Joint Performance
- Weld joint performance varies significantly based on the direction of the weld: longitudinal (along the length) and transverse (across the thickness).
- This variation leads to an anisotropic nature or behavior in terms of metallurgical, mechanical, and chemical properties.
- Weld joints are found to be less reliable than mechanical joints, which is why they are not commonly used for critical applications like construction of bridges and aerospace components.
Advancements in Welding Technology
- With advancements in welding technologies, weld joints are now commonly used in nuclear reactors, aerospace components, and even bridge fabrication.
- The reliability of weld joints has improved due to these advancements.
- Different welding processes result in varying amounts of material loss in the form of spatters. Tig welding offers minimum loss while shielded metal arc welding and gas metal arc welding have higher spatter percentages.
New Section
This section focuses on the finishing, dimensional accuracy, criticality of application, and unique features associated with welding. It also highlights the reduction in ductile to brittle transition observed in certain metal systems.
Finishing and Dimensional Accuracy
- Welding processes generally result in poor finishing and dimensional accuracy due to ripples on welded surfaces.
- Additional machining is often required to remove these ripples and avoid stress concentration effects caused by poor surface roughness.
Criticality of Application
- Due to their lower reliability compared to other joining techniques, weld joints were traditionally not recommended for critical applications.
- However, advancements in technology have made it possible to use weld joints even for critical applications, with special treatments such as shot peening, post-weld heat treatment, and stress removal.
Reduction in Ductile to Brittle Transition
- Weld joints made of structural steel below -20 degrees Celsius exhibit brittleness and low toughness, leading to potential catastrophic failures.
- This behavior is not observed under normal temperature conditions where the metal system shows good toughness and ductility.
New Section
This section highlights the advantages offered by welding as a joining technique, including permanent joints, strength enhancement, metallic continuity, and economic feasibility.
Permanent Joints
- Welding results in permanent joints that become integral parts of the workpiece or main assembly.
- Depending on the filler metal used, weld joints can be stronger than the base metal.
Strength Enhancement
- When weld joints are subjected to severe loading conditions, filler metals with greater strength than the base metal are used.
- In such cases, joint efficiency can exceed 100% due to the higher tensile strength of the weld joint compared to the base metal.
Metallic Continuity
- Welding ensures metallic continuity between joined members, minimizing the chances of corrosive liquid or medium seeping between them.
Economic Feasibility
- Once infrastructure in terms of manpower and welding systems is established, large-scale welding becomes an economical way to achieve required joints.
Limitations of Welding
This section discusses the limitations and disadvantages of welding as a joining process.
Poor Integrity and Reliability of Joints
- Welding requires expertise to produce sound joints, especially for critical applications.
- The cost of labor for developing weld joints is generally high.
- Carelessness during welding can lead to poor integrity and reliability of joints, which is not suitable for critical applications.
- Permanent joints made by welding can create problems in disassembling if required.
Health Hazards
- Inhaling hazardous fumes and vapors generated during welding can cause irritation in eyes and other health issues.
- Proper ventilation systems must be in place to efficiently remove these hazardous substances from the welding area.
Base Metal Assessment
- A careful assessment of the mechanical and metallurgical properties of the base metal is required before deciding on welding.
- Improper welding procedure or implementation can result in poor reliability of joints.
Applications of Welding
This section highlights various sectors where welding is commonly used for joining components.
Resistance Welding
- Mainly used in the automotive sector for joining thin sheets, such as car bodies and oil tank components.
Thermit Welding
- Used for joining rails in railways. It involves using an exothermic reaction to generate heat for melting the edges or faying surfaces of the rail to develop weld joints.
Tungsten Inert Gas (TIG) Welding
- Mainly used in aerospace and nuclear reactors due to its high-quality weld joints achieved through effective shielding and short arc length.
Submerged Arc Welding
- Used in heavy engineering industries and ship work. It utilizes high current to generate heat, melting thick plate surfaces for joint formation.
Gas Metal Arc Welding
- Offers good shielding and high deposition rate, making it suitable for fabricating weld joints in the pressure vessel industry.
Shielded Metal Arc Welding
- Commonly used for depositing weld metal for general purposes and repairs. It is widely used but may not always be performed by highly trained welders.
Other Applications
- Welding is used in various applications such as pressure vessel fabrication, construction of bridges, truss joints in building structures, aircraft and spacecraft component joining, fabrication of railway coaches, electronic circuitry components, electrical components, defense industry systems, oil and natural gas pipelines, and laying railway tracks.
The transcript provided does not specify the language. Therefore, the summary has been written in English.
Welding Applications in Various Industries
This section discusses the various industries where welding is commonly used and its applications.
Welding in Transport Industry
- Welding is commonly used for developing transport tankers for oil, water, and milk transportation.
- It is also used for welding tubes, pipes, chains, LPG cylinders, and developing furniture like gates, doors, and door frames.
Welding in Pressure Vessel Industry
- Welding has found major use in the development of pressure vessels.
- Welded pressure vessels can withstand higher temperatures and pressures compared to riveted ones. Testing is crucial to ensure weld joint integrity due to severe operating conditions.
- Submerged arc welding and MIG welding are commonly used in the pressure vessel sector.
Welding in Bridge Construction
- Bridges require joints with high reliability as they are critical for safety and property protection.
- Riveted joints were traditionally used but welded joints are now widely applied due to advancements in welding technology.
Welding in Shipbuilding Industry
- Welding is extensively used in shipbuilding for joining structural components and repair work under water conditions.
- Previously, ships were produced by riveting but now all-welded ships are common.
Welding in Construction Industry
- Arc welding is extensively used for fabricating steel structures such as trusses and towers in the construction industry.
Welding in Aerospace Industry
- Welding, including spot welding and TIG welding, is extensively used for fabricating aircraft structures and joining body parts.
Welding in Railway Industry
- Railways extensively use welding for fabrication of structures related to coaches and wagons, overlaying wheels, joining rails, and repairing cracks.
Welding in Automotive Industry
- Welding is used for fabricating automobile components like chassis, body structures, fuel tanks, and joining door hinges. Spot welding is commonly used for joining car body parts.
Welding in Electrical Industry
- Various components in the electrical industry are fabricated using welding techniques from generation to utilization of electrical energy.
- Generation involves fabrication of components like pan stocks, control gates, condensers, turbine blades, and cooling fins using welding. Distribution systems require welding for transmission towers and equipment development. Utilization of electrical energy involves the development of motors and other machines using welding techniques.
Welding in Electronic Industry
- Microjoining techniques like ultrasonic welding and soldering are extensively used for joining small-sized electronic components.
Joining Techniques in Engineering
This section discusses various joining techniques used in engineering, such as welding, for the fabrication and assembly of different components.
Welding in Various Industries
- Welding is commonly used in industries like nuclear reactors, oil and gas pipelines, tankers, offshore structures, dockyards, and cranes.
- In the nuclear industry, welding is used to join reactor components and pipeline bends.
- Oil and gas industry utilizes welding for joining pipes during the construction of crude oil and gas pipelines.
- Tankers for storage and transportation also require welding for fabrication.
- Offshore structures are established using welding to join different components. Dockyards and loading/unloading cranes also involve welding for structure fabrication.
Micro Joining Techniques
- Micro joining techniques involve minimal heat energy to melt thin components together.
- These techniques are used to join thin wires, foils, or wire-to-foil connections for producing junctions of thermocouples and strain gauges.
- Processes like micro plasma ultrasonic laser and electronic beam welding are employed for micro joining.
High Energy Density Welding
- Certain joints require high energy density processes that rapidly melt small components before solidification.
- These joints do not bear heavy loads but focus on maintaining electrical and thermal properties.
- Processes like micro plasma ultrasonic laser and electron beam welding are utilized due to their low heat input.
Manufacturing Processes in Engineering
- Different manufacturing processes like machining, welding, casting, and forming are employed to create engineering components with desired size and shape.
- Each process is chosen based on the material properties and performance requirements.
- Welding is suitable for developing components with simpler shapes, offering various ways to make joints that serve their intended function.
Classification of Welding Processes
- In upcoming lectures, the classification of welding processes will be discussed.