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Precision cnc machining technology application and selection


Machining is machined abbreviation refers precisely machined by mechanical removal process materials. Seek quality addition, multiplication, then the production, drilling units, processing necessities
Main Category
There are manual machining and Precision CNC Machining two categories. Manual processing is through the mechanical manual workers milling machines, lathes, drilling and sawing machines and other mechanical equipment to achieve a variety of materials processing methods. Manual processing for small-volume, simple parts production. CNC machining (CNC) refers to the use of numerical control equipment mechanic processing, these numerical control equipment include machining centers, milling centers, EDM wire cutting equipment, thread cutting machines. The vast majority of all machine shop with CNC machining technology. By programming the workpiece in a Cartesian coordinate system position coordinates (X, Y, Z) converted into a programming language, numerical control machine tools, CNC controller to control the axis CNC machine tools by identifying and interpreted programming languages, automatic removal of material as required to obtain a finished workpiece. NC in a continuous manner to the workpiece, suitable for high-volume, complex shape parts.
Processing Technology
Machine shop can be used CAD / CAM (computer-aided design computer aided manufacturing) system for automatic programming of CNC machine tools. Part geometry from the CAD system to automatically convert CAM systems, mechanical workers choose various processing methods on the virtual screen. After some processing methods selected mechanical workers, CAD / CAM system can automatically output CNC code, usually refers to the G-code, and the code is entered into the CNC machine tool controller to the actual machining operation.
Rear equipment
Factory rear equipment, such as metal-cutting machine tools (including cars, milling, planing, plug and other equipment), if the equipment needed for the production of parts is broken, in need of repair, so you need to machine shop for repair or processing. In order to ensure smooth production, general business have a machine shop, is mainly responsible for the maintenance of production equipment.

Practice editing
I. Overview
The rules for all operators engaged in machining, to make specific details to ensure the quality of each machine parts.
Second, the scope
The procedure for machining (including turning, milling, drilling, planing, grinding, cutting, etc.) specific actions when work is described in detail.
Third, the General
Engaged in various mechanical machining process, we must be in accordance with the procedures implemented.
Fourth, the implementation steps
4.1 Those who engage in all kinds of machinery operators, must undergo safety training, examination, before they start to work.
4.2 Preflight
4.2.1 work strictly according to regulations before the use of protective equipment, tied cuff, allowed scarves, gloves, women hair debate should pull in the hat. The operator must stand on the pedals.
4.2.2 respond to various parts of the bolt, travel limit, signal, security protection (insurance) system and mechanical transmission parts, electrical parts, the lubrication points rigorous examination to determine reliably only after the start.
4.2.3 all kinds of machine safety voltage lighting applications, the voltage shall not exceed 36 volts.
4.3 operation
4.3.1 workers, clip, tool and workpiece must be firmly clamped. Various types of machine tools, after driving should be low idle, everything is normal only after the formal job.
Rail road surface machine 4.3.2 workbench ban put tools and other things. Are not allowed to remove the iron hand, you should use special tools to clean.
4.3.3 After the machine before starting to observe the dynamic around, start the machine, safe place to stand to avoid the machine moving parts and iron splash.
4.3.4 all kinds of machine operation, are not allowed to regulate the transmission mechanism or stroke, can not hand the work surface of the touch transmission parts, movement parts, tools, etc. in the processing, and are not allowed to measure any size in operation, prohibit separated Delivery or pick up machine tools transmission parts and other items.
4.3.5 found to have abnormal ring, should be immediately shut down for maintenance, or sick can not be forced to operate the machine are not allowed to overload.
4.3.6 various parts in the process, the strict implementation of the disciplinary process, to see the drawings, to see each part of the control point, the technical requirements of roughness and related parts, and to determine a good production of processing steps.
4.3.7 adjust the machine speed, stroke, clamping workpieces and tools, as well as parking should be wiping the machine. Not allowed to leave their jobs when the machine is running, you must stop when for some reason you want to leave, and cut off the power supply.
4.4 after the operation
4.4.1 will be processed raw materials and processing finished products, semi-finished products and waste must be disposed of at designated locations, a variety of tools and tool must be kept intact, good.
4.4.2 job, you must cut off the power, remove the tool, the ministries handle on the neutral position, lock gates box.
4.4.3 hygiene cleaning equipment, cleaning good iron, good lubricating rail injection, to prevent corrosion.
Process specification editor
Machining procedures are prescribed one of the parts machining process and method of operation such as process documentation, which is under specific production conditions, the more reasonable process and method of operation, in accordance with the provisions written into the process in the form of documents, by After the approval for the production. Machining process planning generally include the following: workpiece machining process route, the specific content of each step and used equipment and technology and equipment, test items and test methods of the workpiece, cutting the amount of time scale and so on.
Steps to develop process specification
1) Calculate the annual production program, to determine the type of production.
2) Analysis of part drawings and product assembly drawings of parts for process analysis.
3) Select the blank.
4) the elaboration process route.
5) determine the allowance of each step, the calculation process dimensions and tolerances.
6) determine the equipment and tools, fixtures, measuring tools and aids used by each process.
7) determine cutting parameters and fixed working hours.
8) determine the technical requirements and test methods for each major step.
9) complete process documentation.
In the development process of order in the process, often on the front it has been preliminarily determined to adjust the content to improve economic efficiency. During the execution process of order, it may occur before the case is not expected, such as the introduction of changes in production conditions, new technologies, new processes, new materials, the use of advanced equipment, require timely revised and improved process planning .

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