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  • 數控技術的總體概述
  • 本站編輯:杭州寬旺機械設備有限公司發布日期:2022-05-11 15:12 瀏覽次數:

對數控技術進行了總體概述。

1. 數控技術發展的52年間,主要經過了六個主要階段:電子管數控系統、晶體管數控系統、集成電路數控系統、小型計算機數控系統、微處理器數控系統、基于工業PC的通用CNC系統。

2. 數控機床加工的原理是:要將被加工零件的圖樣及工藝信息數字化,用規定的代碼和程序格式編寫加工程序;然后將所編程序指令輸入到機床的數控裝置中;再后數控裝置將程序(代碼)進行譯碼、運算后,向機床各個坐標的伺服機構和輔助控制裝置發出信號,驅動機床各運動部件,控制所需要的輔助運動,比較后加工出合格零件。

3. 數控機床主要由加工程序、輸入裝置、數控系統、伺服系統、測量反饋裝置、輔助控制裝置及機床等七個部分組成。

4. 數控機床按加工方式可分為切削機床類、成型機床類、特種加工機床類、其它機床類;按控制系統功能可分為點位控制、點位直線控制、輪廓控制數控機床;按伺服控制方式可分為開環、閉環和半閉環控制數控機床。按數控系統的功能水平可分為高、中、低三檔數控機床。

5. 數控機床對維修人員有較高的技術要求,對刀具夾具也有較高的要求。數控機床主要適用于批量小而又多次生產的零件、幾何形狀復雜的零件、加工過程中必須進行多種加工的零件、必須嚴格控制公差的零件、工藝設計會變化的零件、需全部檢驗的零件。

6. 市場上使用的數控系統很多,編程時應按所使用數控系統代碼的編程規則進行編程。

The numerical control technology is summarized.

1. Numerical control technology development 52 years, mainly through six main stages: valve NUMERICAL control system, transistor numerical control system, integrated circuit numerical control system, small computer numerical control system, microprocessor numerical control system, general CNC system based on industrial PC.

2. The principle of CNC machine tool processing is: to be processed parts of the drawing and process information digital, with the specified code and program format to write processing procedures; Then the programmed instructions are input to the CNC device of the machine tool; After the numerical control device will program (code) decoding, operation, to the machine tool each coordinate servo mechanism and auxiliary control device signal, drive the machine tool each moving parts, control the required auxiliary movement, after processing qualified parts.

3. CNC machine tool is mainly composed of seven parts, including processing program, input device, CNC system, servo system, measurement feedback device, auxiliary control device and machine tool.

4. CNC machine tools can be divided into cutting machine tools, forming machine tools, special processing machine tools, other machine tools according to the processing mode; According to the control system function can be divided into point control, point control line control, contour control CNC machine tools; According to the servo control mode can be divided into open loop, closed loop and semi-closed loop control CNC machine tools. According to the functional level of CNC system, it can be divided into high, middle and low CNC machine tools.

5. CNC machine tools have higher technical requirements for maintenance personnel, and also have higher requirements for tool fixtures. CNC machine tools are mainly suitable for batch small and many times of production of parts, parts of complex geometry, the processing process must be a variety of processing parts, must strictly control the tolerance of parts, process design will change parts, parts need all inspection.

6. There are many NUMERICAL control systems used on the market, and programming should be carried out according to the programming rules of the numerical control system code used.

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