1. Process
refers to the process, in the production process, changing the shape, size, and other production properties and the relative positions of the object, the process of making a finished or semi-finished products. The machining process using a cutter or other tool to use mechanical forces on the machine tool machining a workpiece or blank to be part of the process of machining process.
Introduction
in the production process, any changes in shape, size, location and nature of the production object, making finished or semifinished process is called . Other process is called secondary process.
can be divided into processes: casting, forging, stamping, welding, machining, heat treatment, and assembly process.
ldquo; mechanical manufacturing technology rdquo; Study Course only machining process and the assembly process.
Composition
the process of
1, step
a worker or a group of workers in a work place simultaneously on the same workpiece or several that part of the continuous process of the workpiece is completed, the step is referred. Step is an essential part of the process, the development step is a basic unit of the production planning and cost accounting.
Mechanical parts machining process consisting of several steps, the blank passes through these steps, it is processed into a desirable pattern parts requirements.
2, mounting
in the same step, the workpiece in the operating position can only be setup once, it may be several clamping. Is that part of the installation process one workpiece after completion of the clamping. Reducing the error and reduce the time clamping the workpiece clamping takes consideration should minimize the number of installations.
3-position
in the same processSometimes in order to reduce error and loss of time due to the multiple setups brought, often using the indexing jig table or index. A station installed in a workpiece, the workpiece relative to the tool (or tools) that each occupy a portion of the exact location in the process completed.
4, process step
a step (or one or a mounting station) may require a number of processing surface; it may be only a surface of the processing, but the use of several different processing tool rotation; or only the tool but to cut a plurality of times on the working surface, not all the same and each cut chosen cutting parameters.
is a process step that part of the process in the case of the machined surface, cutting parameters and cutting tools (only spindle speed and feed rate) are invariant completed. The above-mentioned three elements (of the machined surface, cutting parameters and cutting tools) as long as there is an element to change, it can not be considered a single step.
In order to improve production efficiency, sometimes machining with several tools simultaneously processing several surfaces, which is also considered a process step, called a composite step.
5, passes
passes the tool relative to the processing surface refers to that part of the work for the workpiece once the cutting is completed. Each process step may include one pass or several passes.
The foregoing analysis showed that the composition of the process is very complex. Composed by a number of process steps, a process may have several installation, an installation may have several stations, a station may have several steps, and so on.