鑄鐵平板和鑄鐵平臺(tái)的誤差評(píng)定條件

時(shí)間：2016/1/9 15:19:48 瀏覽量：455

1、最小條件原則用兩個(gè)平行的抱負(fù)平面包涵現(xiàn)實(shí)外貌，并使兩抱負(fù)平面間的間隔為最小，此最小間隔為平面度偏差值。

2、貼切原則用一個(gè)抱負(fù)平面與現(xiàn)實(shí)外貌相切，且與現(xiàn)實(shí)外貌之間的最大間隔為最小，此間隔為平面度值

3、最小二乘方原則將一個(gè)抱負(fù)平面按現(xiàn)實(shí)外貌的趨勢(shì)，置于現(xiàn)實(shí)外貌的中部，并使現(xiàn)實(shí)外貌上各點(diǎn)到抱負(fù)平面的間隔平方和為最小，以這個(gè)最小二乘方中央平面作為評(píng)定基面，各測(cè)點(diǎn)對(duì)此平面偏差中最大值與最小值之差為被測(cè)外貌平面度偏差值。

4、鑄鐵平臺(tái)對(duì)角線原則以通過被測(cè)外貌的一條對(duì)角線而平行于另一條對(duì)角線的平面作為評(píng)定基面，各測(cè)點(diǎn)對(duì)此平面偏差中最大值與最小值之差為被測(cè)面平面度偏差值。

5、環(huán)線法原則利用丈量閉合環(huán)的平差原理，使各被測(cè)點(diǎn)平差后的新位置到丈量基面的間隔變?yōu)楦鼽c(diǎn)相對(duì)付抱負(fù)平面的間隔。這時(shí)抱負(fù)平面便是通過原點(diǎn)的天然程度面。

6、三點(diǎn)法原則劃定抱負(fù)平面通過現(xiàn)實(shí)外貌上相距最遠(yuǎn)且不在一條直線上的三點(diǎn)形成的平面為評(píng)定基面，以各測(cè)點(diǎn)距此平面偏差中最大值與最小值之差為所求被測(cè)外貌的平面度偏差值。

7、最大直線度原則以現(xiàn)實(shí)外貌任一截面最大直線度偏差作為平面度偏差值。

鑄鐵平板和鑄鐵平臺(tái)的局部偏差

鑄鐵平板(鑄鐵平臺(tái))的局部偏差是指平板事情面局部平面度加工質(zhì)量，包羅事情面加工的微觀質(zhì)量和事情面小范疇內(nèi)的局部畸變。所謂加工的微觀質(zhì)量是指加工外貌極小間距微小峰谷不屈度，即外貌粗糙度。外貌微觀質(zhì)量好，耐磨損，平板利用壽命高。而事情面小范疇內(nèi)的局部畸變是指加工外貌不屈整、有變形。這里所說的事情面小范疇，對(duì)小平板而言是局部位置，對(duì)大平板則是局部面積。

Error evaluation conditions for cast iron plates and cast iron platforms

1. The principle of minimum condition uses two parallel ambition planes to cover the actual appearance and minimize the interval between the two ambition planes. The minimum interval is the flatness deviation value.

2, the principle of affixing is tangent to the reality of the ambition plane, and the maximum interval between the actual appearance and the actual appearance is the minimum, the interval is the flatness value

3. The principle of least squares places the ambition plane in the middle of the actual appearance according to the trend of the actual appearance, and minimizes the sum of the squares of the points on the realistic appearance to the ambition plane, with the central plane of the least squares as The base surface is evaluated, and the difference between the maximum value and the minimum value of the plane deviation of each measurement point is the deviation value of the measured appearance flatness.

4. The principle of the diagonal of the cast iron platform is to evaluate the base plane by a diagonal line passing through the diagonal of the measured appearance parallel to the other diagonal line. The difference between the maximum and minimum valuesof the plane deviation of each measuring point is Measuring surface flatness deviation value.

5. The principle of the loop method uses the adjustment principle of measuring the closed loop, so that the interval from the new position after the measurement of the measured points to the measuring base becomes the interval of each point relative to the paying plane. At this time, the ambition plane is the natural degree of the origin.

6. The principle of three-point method delimits the ambition plane from the plane formed by the three points which are farthest apart from each other on the real appearance and not on a straight line, and the difference between the maximum value and the minimum value of each measurement point from the plane deviation is The flatness deviation value of the measured appearance.

7. The principle of maximum straightness is the deviation of the maximum straightness of any section of the actual appearance as the deviation of the flatness.

Local deviation of cast iron plate and cast iron platform

The local deviation of the cast iron plate (cast iron platform) refers to the local flatness processing quality of the flat surface, including the microscopic quality of the surface processing and the local distortion in the small surface of the surface. The so-called microscopic quality of processing refers to the extremely small spacing of the processing appearance, the small peaks and valleys, the roughness, that is, the appearance roughness. The appearance is microscopically good, wear-resistant, and the life of the flat plate is high. The local distortion in the small category of the object refers to the unfinished and deformed appearance of the processing. The small area mentioned here is a local position for a small flat plate and a partial area for a large flat plate.

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