After working for a while, it’s inevitable to conduct interviews for new hires. Today, I’d like to share some questions that I commonly ask when interviewing mechanical engineers. Everyone can reflect on these questions and …
Top 20 Mechanical Engineer Interview Questions: Ace Your Next Interview Read More »
Like illustrations and text, technical drawings serve as one of the primary tools for humans to express design concepts, facilitate technical communication, and organize construction and production. They act as the “common language” in the …
Standard CAD Drawing Frame Size: Unlocking the Secrets Read More »
First of all, one should never assume that mechanical engineering is only about structures, nor should it be thought that structure designing solely involves using software like PROE, SolidWorks, etc. In fact, those working on …
Unveiling Mechanical Engineer Levels: A Comprehensive Guide Read More »
Bolted connection under working shear force As shown in Figure 1-8, this connection uses a bolt to resist the working load F through a punched hole. Assuming each bolt receives an equal working load, the …
In the diagram above: Based on the above, we can derive the relationship between road width, turning radius, and vehicle dimensions as follows:
1. Yield Criteria Three commonly used yield criteria in engineering are: (1) Proportional Limit – The highest stress that maintains a linear relationship on the stress-strain curve, internationally represented as σp. Material is considered to …
Yield Strength vs Tensile Strength of Materials: Uncover the Secrets Read More »
Both steel and iron are iron-carbon alloys that contain a small amount of alloying elements and impurities. According to the different carbon content, they can be divided into: Related reading: Pig Iron vs Wrought Iron …
Cast Steel vs Cast Iron: Understanding the Differences Read More »
Looking to take your SolidWorks skills to the next level? Look no further than these expert tips and tricks to help you streamline your workflow and create more efficient designs. From keyboard shortcuts to advanced …
226 SolidWorks Tips to Boost Your Designing Efficiency Read More »
There are many types of valves, each with its own advantages and disadvantages. Below, we will list the advantages and disadvantages of the top five valves, including the gate valve, butterfly valve, ball valve, globe …
Exploring the Pros and Cons of 5 Major Valve Types Read More »
The selection of radial clearance for rolling bearings is crucial as it is one of the critical factors that determine whether the bearings can function properly. Proper selection of radial clearance can ensure the reasonable …
Bearing Clearance Guide: How to Choose the Right One for Your Application Read More »
Traditional hub connection devices typically rely on keys to join the hub and shaft, with keyways machined into both components. Unfortunately, this practice weakens the shaft’s strength, increases manufacturing costs, and can even make machining …
Hydraulic vs Mechanical Expansion Sleeves: Which is Best for Your Needs? Read More »
The fiber laser cutting machine will produce dust and smoke during the processing and cutting process. On the one hand, it will have adverse effects on the health of the operating engineer, and on the …
Laser Cutting Machine Dust Removal: Dry and Wet Treatment Tips Read More »
Loose bolts will have some effects on the use of bolts. Even a loose bolt may bring the whole production plant to a standstill, and cause the company to lose thousands of yuan or even …
Explained: Why Bolts Loosen and How Preload Prevents It Read More »
Orifice flowmeters and wedge flowmeters belong to the constant cross-section, differential pressure type of flowmeters. In other words, they share the same concept. An orifice flowmeter involves inserting a circular plate with a hole in …
Orifice Flowmeters vs. Wedge Flowmeters: Understanding the Differences Read More »
1. The through-hole and threaded hole of two connected parts do not match; For example: During assembly, it is required to expand the threaded hole and replace the screw. During assembly, secondary processing is required …
17 Tips for Beginner Part Designers: Avoid Common Mistakes Read More »
What should be done if the internal hexagon screw slips? And why do hexagon screws slip? Many people are asking about the knowledge related to the slipping of internal hexagon screws. Based on my experience, …
Prevent Hexagon Screw Slippage with these Expert Tips Read More »
Threaded fasteners are easy to assemble and disassemble, and they can be used repeatedly. However, one disadvantage is that they may become loose under certain working conditions, particularly when subjected to vibration, impact, variable loads, …
Threaded Fasteners: Causes and Precautions for Loose Connections Read More »
Gears are a common type of spare part used in various industries, including aviation, shipping, and automobiles. When designing and producing gears, there is a requirement for the number of teeth. Some people claim that …
Unlocking the Mystery of Gears: Why 17 is the Magic Number Read More »
Summary: Bolt connections tightly fasten two or more connected parts by the clamping force between them. The friction coefficient of the bearing surface and the thread are two critical factors that affect the clamping force. …
Understanding the Effects of Friction Coefficient on Bolted Connection Stability Read More »
Abstract: This article introduces several common methods of bolt anti-corrosion in offshore projects, analyzes the problems encountered in the actual construction, and puts forward a new method of bolt anti-corrosion. Introduction Bolted connection is a …
Say Goodbye to Corrosion: A New Bolt Anti-Corrosion Method Read More »
During the bolt manufacturing process, bolt fracture occurred during the straightening process. To identify the root cause of the bolt fracture, the broken bolt underwent macroscopic examination, chemical composition analysis, mechanical property test, metallographic structure …
Abstract: The increasing demands for high-strength bolts, along with their expanding application fields, have led to higher performance requirements for high-strength bolt steel. The steel must not only exhibit high strength but also ensure reliable …
High-Strength Bolt Materials: Trends & Latest Developments Read More »
After 90 hours of operation, a broken rivet head was discovered at the junction between the 15a frame and the inlet skin. Observations and analysis of the fracture surface, including macro and micro observations, metallography, …
Understanding Rivet Fatigue Fracture: Causes and Stress Analysis Read More »
Readers often ask me what type of steel is used in my Damascus knife. They also ask what is the sharpest and best steel for knife making. This is both a straightforward and a complex …
Choosing the Right Steel for Knives: Which One Is Best for You? Read More »
As a mechanical design engineer, many habits must be transformed into subconscious routines, otherwise, it leads to endless pain and rework, and much of that pain is unbearable and unbearable, causing a deep sense of …
Top Work Habits for Success in Mechanical Design Engineering Read More »
The elongation and reduction of the area of metal materials can provide specific insights into the characteristics of the materials. Elongation is a broad concept that encompasses various parameters such as maximum force total elongation …
Metal Elongation Testing: Tips to Improve Accuracy Read More »
1. What is fatigue? Fatigue refers to the decline in the structural performance of materials, particularly metals, when subjected to cyclic stress or strain, ultimately leading to failure. Fatigue failure is a prevalent form of …
7 Fatigue Basics: Understanding, Prevention, and Control Read More »
1. What are the factors affecting the fatigue strength of bolts? There are various factors that can impact the fatigue strength of a connection, including the material used, structural design, size, manufacturing process, thread-to-thread fit, …
6 FAQs on Fatigue Calculation of Bolts: Answers You Need to Know Read More »
Is your mechanical device failing unexpectedly? Are you experiencing sudden fractures and cracks in your metal materials? Look no further than our comprehensive guide on fatigue and fracture. Learn about the different types of fatigue …
Fatigue Fracture: Types, Characteristics & Fixes Read More »
Are you curious about the hidden defects present in fasteners that can lead to their failure? Raw materials used in the production of fasteners can contain a variety of surface and internal defects, including cracks, …
Uncovering Common Defects in Fastener Raw Materials Read More »
1. What if it is quenched but not hardened? At the quenching site, it is often heard that the parts are not hardened after quenching. The purpose of quenching is to improve the hardness of …
1. Basic concepts 1. Plastic deformation mode of single crystal at room temperature or low temperature: Diffusive deformation, as well as grain boundary sliding and movement, are primarily observed in high-temperature deformations such as creep. …
Plastic Deformation 101: Key Basics You Need to Know Read More »
In the process of industrial production, equipment is both a vital vehicle for production and the material foundation for the survival of the company. The quality of equipment operation directly affects the company’s production, operations, …
Mechanical Equipment Lubrication: The Ultimate Guide Read More »
Do you ever wonder why some surfaces feel smooth to the touch, while others are rough and uneven? The answer lies in surface roughness, a concept that refers to the degree of unevenness on a …
Guidance on gasket thickness for non-metallic flat washers is absent in the ASME B16.21 standard. Selecting the appropriate gasket thickness for a specific application is a recurring problem, difficult to answer succinctly. Thus, we encourage …
Easy Steps to Measure Washer Thickness: Uncover the Secrets Read More »
Everyone knows that oxygen pipelines must be oil-free and degreased. Today, we will discuss the method of degreasing oxygen pipelines. Degreasing, by definition, is the removal of oil stains from the internal and external surfaces …
Oxygen Pipeline Degreasing – Why, How, and Necessary Steps Read More »
The fatigue properties of materials are typically expressed through uniaxial stress cycles, known as S-N curves. It’s important to note that fatigue theory based on fracture mechanics is not being considered in this context. The …
Fatigue Analysis Based on S-N Curve: Solving Basic Problems Read More »
Residual stress is a type of internal stress referred to as such in engineering. The distribution of residual stress in a workpiece is often uneven, which can significantly impact its static strength, fatigue strength, shape …
X-ray Residual Stress Measurement: Principles and Applications Read More »
1. Aluminum and Aluminum Alloy Heat Treatment Process 1.1 Purpose of aluminum and aluminum alloy heat treatment The purpose is to heat the aluminum and aluminum alloy materials to a certain temperature and keep them …
Aluminum Heat Treatment: Your Comprehensive Guide Read More »
For different types of steam turbine generator units, the shapes of both dynamic and static components are intricate and variable, and their deformation (amplitude) cannot be described by a simple function of dynamic stress. Consequently, …
Fatigue Damage in Components: Understanding the Effects of Vibration Read More »
Copper Wire Diameter Table mm.G. AWG SWG Dia.mm sq.mm2 kg/km Ohms Per Kilomtr mil sq.in cir.mil 8 8.000 50.270 446.9 315.00 0.0779300 99,225 1 1 7.620 45.600 405.4 300.00 0.0706900 90,000 7.341 42.220 343.1 289.00 …
Copper Wire Diameter Specification Comparison Table Read More »
1. What Are Studs, Nuts, and Screws? A stud refers to a type of fastener that has no head and is threaded at both ends, such as a double-end stud or a welding stud. A …
Dimension Table for Base Holes: Studs, Nuts, and Screws Read More »
Even if an object is completely isolated from the outside world, its mechanical vibration will gradually attenuate. This phenomenon, where mechanical energy is dissipated into heat energy, is called internal friction. It refers to the …
Exploring Damping Performance and Its Mechanisms Read More »
Generally, the majority of wires and cables use copper cores, but what type of copper is typically used? What are the specifications and models of copper core cables? Let’s take a look. What Kind of …
1. What is a Copper Core Cable? A copper core cable refers to a cable with a conductor made of copper. 2. What is a YJV Copper Core Cable? Cables can be categorized into various …
What is a Copper Core Cable? A copper core cable refers to a cable with a conductor made of copper. VV32 YJV32 Copper Core Plastic Insulated Power Cable Diameter Chart Number of Cores Single Core …
Ultimate Guide to Cable Diameter Sizes: Essential Chart Read More »
The torque wrench is mainly used to fasten bolts, and its application torque is generally 20%~90% of the wrenching torque, which is continuously adjustable. When using, set the target torque first, and pull the handle. …
Why Did Your Wrench Suddenly Break? Discover the Likely Reasons Read More »
For a component with an initial crack of size a0, when subjected to static loads, as long as the working stress (σ) is less than the critical stress (σc), the component will function safely and …
Moh’s Scale of Hardness There are two methods to measure the hardness of materials: scratch hardness and static load indentation hardness. Scratch hardness, also known as Mohs hardness, is a relative hardness and is rather …
Unveiling the Ultimate Mohs Hardness Scale Guide & Chart Read More »
What Is Washer? A washer is a component that sits between the connected part and the nut. Typically, it is a flat metal ring used to protect the surface of the connected part from being …
Ultimate Guide to Washer Specifications and Weight Charts Read More »
What Is Double-Headed Stud? A double-end stud (also known as a double-headed stud) is a cylindrical fastener with threads at both ends. The diameter, length, and quantity of double-head studs should meet specific requirements, and …
Uncover the Ultimate Double-Headed Stud Weight Chart Read More »
