The fatigue strength of materials is very sensitive to various external and internal factors. External factors include the shape and size of parts, surface finish and service conditions. The internal factors include the composition, microstructure, purity and residual stress of the material. The slight change of these factors will cause the fluctuation or even great …
8 Factors Affecting Fatigue Strength Of Metal Materials Read More »
What is residual stress Let’s start with an official definition of residual stress: Residual stress refers to the effect and influence of various process factors in the manufacturing process; When these factors disappear, if the above effects and influences on the component can not disappear completely, and some of them remain in the component, then the …
What Is Residual Stress? How To Measure Residual Stress Read More »
Why Heat Treatment is Required in Mechanical Processing This is a very good question. This is a rather confusing issue for many newcomers who have just entered the industry, and it is also a problem that many people with considerable experience have not thought deeply. Today, I will explain this in more details here. The heat …
I will talk about the working principle and difference between DC motor and AC motor in the simplest and most understandable way. The picture above is the simplest physical model of a DC motor. Working principle DC Motor The DC power supply current flows along the positive pole of the power supply to the left …
DC Motors vs. AC Motors (The Ultimate Difference) Read More »
The general structure of an industrial robotic electric servo system is three closed-loop control, namely current loop, speed loop and position loop. In general, for the AC servo drive, various functions such as position control, speed control, and torque control can be realized by manually setting the internal function parameters. How to choose the servo …
Various types of bearings have different characteristics due to different designs. Due to the variability and complexity of the specific installation location and application of bearings, there is no fixed mode for bearing type selection In order to adapt to the specific installation position and application conditions of a certain host, it is suggested to …
Under which conditions will the servo motor shake? How to solve these problems caused by servo motor jitter? How are they solved? For example: if the acceleration and deceleration time is set too small, the servo motor will produce high inertia jitter when it suddenly starts or stops… Increasing the acceleration and deceleration time can …
We are doing a lot of different measurements every day, and we are pursuing the accuracy of measurement in the process of measurement. Today, we will talk about the influence of temperature on length measurement. 1. Factors affecting temperature error In measurement conditions, temperature, humidity, vibration, dust and corrosive gas can directly or indirectly affect the …
Temperature Influence On Measurement Dimension (Basic Analysis) Read More »
Machining error refers to the degree of deviation between the actual geometric parameters (geometric dimension, geometric shape and mutual position) and the ideal geometric parameters. The degree of conformity between the actual geometric parameters and the ideal geometric parameters is the machining accuracy. The smaller the machining error is, the higher the degree of conformity …
How to improve the strength of bolt connection? We can achieve it from the following five points. 01 Improve the load distribution between threads When the common nut is used, the distribution of axial load is not uniform As shown in Fig. 1 (a), the load of the first circle is the largest from the …
Shot blasting Shot blasting is also the name of a mechanical surface treatment process, similar to sand blasting. Its principle is to use the motor to drive the impeller body to rotate. By the action of centrifugal force, the balls (including casting balls, cutting balls, stainless steel balls, etc.) with the diameter of 0.2 ~ …
Shot Blasting Vs Sand Blasting: What is the difference? Read More »
Die casting is a kind of metal casting process, which is characterized by using the mold cavity to apply high pressure to molten metal, similar to plastic injection molding. Die casting is especially suitable for manufacturing a large number of small and medium-sized castings, so die casting is the most widely used casting process. Compared …
1. Selection of cylinder 1. Selection of types The type of cylinder should be selected correctly according to the working requirements and conditions. The cushion cylinder should be selected when the cylinder reaches the end of stroke without impact phenomenon and impact noise; Light cylinder is required for light weight, thin cylinder is required for …
What Mechanical Engineers Need To Know About Cylinders Read More »
In production, sometimes there is insufficient hardness after quenching, which is a common defect in the process of heat treatment and quenching. ”There are two manifestations of “insufficient hardness”, one is that the hardness of the whole workpiece is low, the other is that the local hardness is insufficient or soft spots appear. When the …
How To Solve The Problem Of Hardness Deficiency During Quenching? Read More »
How can the hardness of H13 die steel reach 58HRC through heat treatment? It can be reached by 1050 ~ 1100 ℃ heating quenching and oil quenching. But the general hot work die steel does not be required with such high hardness because the performance will be very poor under high hardness. Generally, the hardness in the range of HRC46-50 …
Stepper Motor Working principle of stepping motor Stepper motor, as a special motor for control, is the actuator of converting electric pulse into angular displacement. When the stepping driver receives a pulse signal, it drives the stepping motor to rotate at a fixed angle in the set direction (called “step angle”). It rotates step by …
Servo Motor vs Stepper Motor (Working Principle and Performance Difference) Read More »
The main forms of metal structure are: frame structure, container structure, box structure, general structure. The process of riveting operation can be divided into: preparation, lofting, molding and assembly connection. The connection method of metal structure is: riveting, welding, rivet welding, bolt connection. In the mechanical manufacturing industry, the riveter belongs to the heat …
444 Mechanical Knowledge (Mechanical Engineers Must Know) Read More »
Construction machinery is inseparable from the oil cylinder, and the oil cylinder is inseparable from the seal. The common seal is the seal ring, also known as the oil seal, which can isolate the oil and prevent the oil from overflowing or passing through. Here, we have sorted out the types and forms of some …
6 Types Of Cylinder Seal: Do You Know All Of Them? Read More »
There are ten quenching methods in the heat treatment process, which are: single-medium (water, oil, air) quenching; interrupted quenching; martempering; martempering below MS point; isothermal quenching of bainite; compound quenching; precooled isothermal quenching; delayed cooling quenching; quenching self tempering; jet quenching; 1. Single-medium (water, oil, air) quenching In this process, the workpiece heated to the …
10 Types Of Quenching Methods In Heat Treatment Process Read More »
Mechanical lubricating oil refers to the special lubricating oil for special machinery, barrel-making machinery, loading and unloading machinery, stamping and processing machinery and other mechanical equipment. There are more than ten kinds of mechanical lubricating oil, including special oil for air compressor, special anti-wear hydraulic oil for barrel-making machinery, heavy load gear oil and hydraulic …
9 Common Misconceptions About Machinery Lubrication Read More »
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