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2022年08月15日
What is DSM IV TR?
The Diagnostic and Statistical Manual of Mental Disorders, fourth edition, text revision (DSM-IV-TR) (American Psychiatric Association [APA], 2000) is a compendium of mental disorders, a listing of the criteria used to diagnose them, and a detailed system for their definition, organization, and classification.
How many G-codes are there?
There are approximately one hundred G-codes, with separate codes for turning and milling. Many codes are the same for both machine types, though there is some variation among code for machines from different manufacturers.
What is lathe spindle?
Lathe spindles are used for machine-cutting of workpieces. They can also be referred to as workpiece spindles, as the workpiece is clamped via the chuck of the lathe spindle. The rotating workpiece is machined by the tool attached to the driven machine axis.
How are parts machined?
Machining generally describes a manufacturing process in which a worker uses sharp cutting tools to remove excess material from a part in order to create a desirable new shape. Castings, forgings, extrusions, bar stock and even raw materials can all provide substrates for the process of machining.
What is the use of chuck?
A chuck is a specialized type of clamp used to hold an object with radial symmetry, especially a cylinder. In a drill, a mill and a transmission, a chuck holds the rotating tool; in a lathe, it holds the rotating workpiece.
Why is lathe used?
A lathe is a machining tool that is used primarily for shaping metal or wood. It works by rotating the workpiece around a stationary cutting tool. The main use is to remove unwanted parts of the material, leaving behind a nicely shaped workpiece.
What is aluminium machining?
Machining is a subtractive manufacturing process, meaning it removes material from a workpiece to create the desired part or product. It is highly versatile, accommodating a wide range of metal and non-metal substrates. One of the most common materials used in machining operations is aluminum.
What is difference between NC and CNC machine?
NC machine is the machine that is controlled by a set of instructions in the form of numbers, letters, and symbols called a program. CNC machine is used to control motions of the workpiece and tool with a computer program written in alphanumeric data.
What is the difference between VMC and HMC?
A VMC uses cutters to remove metal from a workpiece and employs a vertical spindle. Because of that vertical orientation, a VMC's tools typically work in a vertical work plane. HMCs employ a spindle that runs on a horizontal work plane and uses cutting tools to remove metal from the workpiece.
What is a 3 axis machine?
3-axis machines are typically used for machining of 2D and 2.5D geometry. Machining of all 6 sides of a part is possible in 3 axis machining but a new fixturing set-up is required for each side, which could be expensive (more on that below). For a single fixture setup, only one side of the part can be machined.
