工程制圖開放實驗二指導(dǎo)書-在線瀏覽
2025-03-04 03:29本頁面
【正文】 ities of representation and freehand sketching.二、 實驗要求 Requirements 學(xué)習(xí)視圖的概念及國標(biāo)規(guī)定。Study the methods of freehand sketching. 掌握繪圖規(guī)范及國標(biāo)要求。Master the construction methods of cuts. 掌握形體的合理表達(dá)方法。求將所設(shè)計的產(chǎn)品圖樣畫在A3圖紙上。在機器測繪、討論設(shè)計方案、技術(shù)交流、現(xiàn)場參觀時，受現(xiàn)場或時間限制，通常只繪制草圖。（2）目測尺寸要盡量準(zhǔn)，各部分比例勻稱；Sizes obtained by ocular estimate method should be exact and parts should be shapely.（3）繪圖速度要快；Drawing speed should be fast.（4）標(biāo)注尺寸無誤，書寫清楚。Some basic skills of freehand sketching should be mastered.（1）握筆方法 the way of holding pencil 手握筆的位置要比用儀器繪圖時高些，以利運筆和觀察目標(biāo)。~60186。The pencil should be hold tightly the holding position should be higher than drawing tools. The angle between the penholder and the paper is 45186。.（2）直線的畫法 drawing a straight line 畫直線時，手腕靠著紙面，沿著畫線方向移動，保持圖線穩(wěn)直。 When draw a straight line, put the wrist on the paper and move along the line, keeping the line straight. 畫垂直線時自上而下運筆；畫水平線自左而右的畫線方向最
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