NEWS CENTER
產品加工(gong)工(gong)藝的合理性
1．構(gou)成輪廓的幾何條件
在車削加工中手(shou)工編(bian)程時(shi)，要計算每(mei)個節(jie)點(dian)坐標；在自動編(bian)程時(shi)，要對構(gou)成輪廓所(suo)有幾何元素(su)進行定義(yi)。因此在分析圖時(shi)應注(zhu)意：
（1）圖(tu)上是否漏(lou)掉(diao)某尺寸，使(shi)其幾何條(tiao)件不充分，影(ying)響到輪廓的構成；
（2）圖(tu)上的圖(tu)線(xian)位置是否模糊(hu)或尺寸(cun)標注(zhu)不清，使編(bian)程無(wu)法下手；
（3）圖(tu)上給定的幾何條件是否不合理(li)，造成數學處理(li)困難。
（4）圖上尺(chi)寸(cun)標(biao)注(zhu)方法應(ying)適應(ying)數控車(che)床加工的特點，應(ying)以同一基準標(biao)注(zhu)尺(chi)寸(cun)或直接(jie)給出(chu)坐(zuo)標(biao)尺(chi)寸(cun)。
2．尺寸(cun)精度(du)要求
分析圖樣尺寸精度(du)的要求，以判(pan)斷能否利用車削工(gong)藝(yi)達到(dao)，并確定控制尺寸精度(du)的工(gong)藝(yi)方法。
在(zai)該項分析(xi)過程中(zhong)，還可以(yi)同時(shi)(shi)進行一(yi)些尺(chi)寸的換算(suan)，如(ru)增(zeng)量尺(chi)寸與對(dui)尺(chi)寸及尺(chi)寸鏈計算(suan)等(deng)。在(zai)利(li)用數控車床(chuang)車削時(shi)(shi)，常常對(dui)要求(qiu)的尺(chi)寸取最大和比(bi)較小極限(xian)尺(chi)寸的平均值(zhi)作(zuo)為(wei)編(bian)程的尺(chi)寸依據。
3．形狀(zhuang)和位置精度的要求
圖樣(yang)上給(gei)定的(de)形(xing)狀和位(wei)置公差是保證精度的(de)重要(yao)依據。加(jia)工時(shi)，要(yao)按照其要(yao)求(qiu)確定的(de)定位(wei)基準(zhun)和測量基準(zhun)，還可以根據數控車床的(de)特殊需(xu)要(yao)進行一些
4．表面粗糙(cao)度(du)要求
表(biao)面粗糙(cao)度是(shi)保證表(biao)面微觀精度的重要(yao)(yao)要(yao)(yao)求，也是(shi)合理選擇(ze)數控(kong)車床、刀(dao)具及確(que)定切削用量的依據。
5．材料與熱處(chu)理要(yao)求
圖樣上(shang)給定的材料(liao)與熱處理要求，是選擇刀(dao)具(ju)、數控車床型號、確定切(qie)削用量的依據。
Rationality of Product Processing Process
1. Geometrical conditions for the composition of an outline
When manual programming is done in turning, the coordinates of each node must be calculated; When programming automatically, all the geometric elements that make up the contour are defined. Therefore, when analyzing the map, it should be noted that:
(1) Whether a certain size is missing on the figure, making its geometric conditions insufficient, affecting the composition of the outline;
(2) Whether the position of the graph line on the graph is blurred or the size is unclear, so that the programming can not start;
(3) Whether the given geometric conditions on the graph are unreasonable makes mathematical processing difficult.
(4) The dimensional marking method on the figure should adapt to the characteristics of NC lathes. It should be marked with the same reference or directly give the coordinate size.
2. Size accuracy requirements
This paper analyzes the requirements of size accuracy of the pattern to determine whether it can be achieved by turning technology and to determine the process method for controlling size accuracy.
In the process of this analysis, some dimensions can be converted at the same time, such as incremental size and absolute size and size chain calculation. When turning a CNC lathe, the average of the required maximum and minimum limit dimensions is often taken as the programming size basis.
3. Requirements for shape and position precision
The shape and position tolerance given on the pattern is an important basis for ensuring accuracy. When processing, according to its requirements to determine the positioning benchmarks and measurement benchmarks, but also according to the special needs of CNC lathes to carry out some
4. Surface roughness requirements
Surface roughness is an important requirement to ensure surface microscopic accuracy, and it is also the basis for reasonably selecting CNC lathes and cutters and determining the cutting amount.
5. Material and heat treatment requirements
The material and heat treatment requirements given on the pattern are the basis for selecting tools, CNC lathe models, and determining the cutting amount.