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heat treatment of metals in ancient China
Heat Treatment of Metals in Ancient China
The history of heat treatment of metals in China dates back to the Shang Dynasty (1600-1046 BCE). This early heat treatment was used to soften and harden bronze utensils and weapons such as knives and spearheads, by heating and cooling in a process that i......
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Hydraulic press operating procedures
Operating Procedure for Oil Pressure Machine
1. General
Oil pressure machines are a type of machine used to generate mechanical pressure by converting electricity into mechanical energy. This machine is widely used in factories and mechanical workshops. Its purpose is to exert a pressing force o......
Automatic (semi-automatic) thread rolling machine operating procedures
Auto-Screw Machine Operation Procedure
1. Worker Preparation and Safety
Before beginning to operate an auto-screw machine, the worker must make sure they are wearing the appropriate safety equipment. This should include: hard hat, safety goggles and gloves, and hearing protection. Appropriate c......
Turning of outer circular surface
Outer Diameter Turning
Outer diameter turning is a type of machining process that involves working to create a smooth, high-quality finish on the outer surfacce of a metal part. This process is often referred to as “turning” or “OD turning” in machining processes, and is typically used to cre......
Turning
Turning
Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helical toolpath by moving more or less linearly while the workpiece rotates. The tools axes of movement may be literally a linear axis, but they can also be combined into more complex mot......
The Feed Rate of Semi-finishing Carbide Outer Turning Tool in Turning
Turning of Hard alloy External Circle Cutter Half Finish Turning
Hard alloys are materials that have a high work-hardening rate, meaning they harden under the stress of machining or grinding operations. For this reason, they are usually machined using tools that are specially suited to their exac......
Design and construction of large and medium-sized passenger car body pattern
Design and Construction of Bus Body Pattern
Bus is an important public transport tool, and its body shape design has always been an integral part of public transport vehicles. To ensure the safe and reliable operation of buses, its body shape design plays an important role. Therefore, the design......
Electrolytic deburring
Electrolytic Deburring
Electrolytic deburring has become an essential way of finishing metal parts and products by removing sharp edges and burrs that can lead to later damage and performance issues. Electrolytic deburring is a chemical process that is used to quickly remove burrs and reduce shar......
Characteristics of powder metallurgy oil-impregnated bearings
Powder Metallurgy Bearing Characteristics
Powder metallurgy bearings are capable of producing high precision and high strength products with uniform density and less porosity. Combining well-chosen lubricants with the structural characteristics of powder metallurgy bearings, such bearings can han......
The development history of various grinding machines
The History of Grinding Machines
Grinding machines have been around for centuries and have been used in various industries for shaping, grinding and finishing various materials. They have evolved from manual labor to sophisticated machinery and are now used in many different industries for a vari......
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