The composition of the machining process
2023-10-16 16:06:48
An example of processing four workpieces of loading, unloading, drilling, reaming and reaming after a single clamping by using a rotary table. The process is not only a basic unit that constitutes a process, but also a time quota and a worker. The basic unit for scheduling work and quality inspection.
The machining process consists of one or several sequential processes, which can be divided into several installations, stations, steps and passes.
1) Step
A process is a part of a process that is completed by one or a group of workers at a work site for one or several consecutive workpieces.
The machining of the part is divided into two steps: turning and drilling. Because the operation of the two workers and the continuity of CNC lathe processing have changed. The main basis for distinguishing processes is whether the work site (or equipment) changes and whether the part of the process is continuous. In the turning process, although a plurality of processing surfaces and a plurality of processing methods (such as a car, a drill, etc.) are included, the elements of the dividing process are not changed, so they belong to the same process. However, since the processing continuity has changed, it should be two processes; the same process of trimming the sharp edges and burrs, because the use of equipment and work sites have changed, it should also be used as another process.
2) Steps and passes
A step is a part of a process that is continuously performed without changing the surface (or the joining surface at the time of assembly) and the processing (or assembly) tool. A process can include several steps or only one step. The installation of the large end face, the outer circle of the car, the chamfering, etc., constitutes four steps due to the difference between the machined surface and the used tool.
In general, any element that constitutes a step (machined surface, tool, and machining continuity) changes to another step. However, the situation indicated below should be based on the single-piece small batch production.
For those same steps that are performed consecutively in one setup, it should be considered as one step. Three drills on the part. Can be used as a step.
In order to increase productivity, sometimes several tools are used to process several surfaces at the same time. In this case, it should also be regarded as a step, called a composite step.
In one step, if the metal layer cut by the machined surface is thick and needs to be cut several times, each cut is a pass. A step can include a pass or a few passes.
3) Installation and workstation
The number of clamping should be minimized during the machining of the workpiece, because one more clamping error occurs once more than one clamping, and the auxiliary time is increased. Therefore, various rotary tables, rotary clamps or moving clamps are commonly used in production so that the workpieces can be processed in different positions after the workpiece is clamped once. In order to complete a certain process content, each position occupied by the workpiece (or assembly unit) together with the movable part of the fixture or device with respect to the tool or the fixed part of the device is called a station. Before the workpiece is machined, it takes up a correct position (positioning) on ​​the machine or fixture, and then the process of clamping is called clamping. The part of the process that the workpiece (or assembly unit) completes after a single setup is called installation. There can be one or more installations in one operation.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
The machining process consists of one or several sequential processes, which can be divided into several installations, stations, steps and passes.
1) Step
A process is a part of a process that is completed by one or a group of workers at a work site for one or several consecutive workpieces.
The machining of the part is divided into two steps: turning and drilling. Because the operation of the two workers and the continuity of CNC lathe processing have changed. The main basis for distinguishing processes is whether the work site (or equipment) changes and whether the part of the process is continuous. In the turning process, although a plurality of processing surfaces and a plurality of processing methods (such as a car, a drill, etc.) are included, the elements of the dividing process are not changed, so they belong to the same process. However, since the processing continuity has changed, it should be two processes; the same process of trimming the sharp edges and burrs, because the use of equipment and work sites have changed, it should also be used as another process.
2) Steps and passes
A step is a part of a process that is continuously performed without changing the surface (or the joining surface at the time of assembly) and the processing (or assembly) tool. A process can include several steps or only one step. The installation of the large end face, the outer circle of the car, the chamfering, etc., constitutes four steps due to the difference between the machined surface and the used tool.
In general, any element that constitutes a step (machined surface, tool, and machining continuity) changes to another step. However, the situation indicated below should be based on the single-piece small batch production.
For those same steps that are performed consecutively in one setup, it should be considered as one step. Three drills on the part. Can be used as a step.
In order to increase productivity, sometimes several tools are used to process several surfaces at the same time. In this case, it should also be regarded as a step, called a composite step.
In one step, if the metal layer cut by the machined surface is thick and needs to be cut several times, each cut is a pass. A step can include a pass or a few passes.
3) Installation and workstation
The number of clamping should be minimized during the machining of the workpiece, because one more clamping error occurs once more than one clamping, and the auxiliary time is increased. Therefore, various rotary tables, rotary clamps or moving clamps are commonly used in production so that the workpieces can be processed in different positions after the workpiece is clamped once. In order to complete a certain process content, each position occupied by the workpiece (or assembly unit) together with the movable part of the fixture or device with respect to the tool or the fixed part of the device is called a station. Before the workpiece is machined, it takes up a correct position (positioning) on ​​the machine or fixture, and then the process of clamping is called clamping. The part of the process that the workpiece (or assembly unit) completes after a single setup is called installation. There can be one or more installations in one operation.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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