范文一:常用表面粗糙度数值
常用零件表面的粗糙度参数值
基 本 尺 寸 ,mm
公 差 等 级 表 面
~ 50 50 ~ 500
轴 0.2 0.4
5
孔 0.4 0.8 配
合 轴 0.4 0.8
6
表 孔 0.4 ~ 0.8 0.8 ~ 1.6 面 轴 0.4 ~ 0.8 0.8 ~ 1.6
7
孔 0.8
轴 0.8
8
孔 0.8 ~ 1.6
基 本 尺 寸 ,mm
公 差 等 级 表 面
~ 50 50 ~ 120 120 ~ 500
轴 0.1 ~ 0.2 0.4 0.4 压
5
孔 0.2 ~ 0.4 0.8 0.8 过 入
装 盈 轴 0.4 0.8 1.6
6 ~ 7
配 配 孔 0.8 1.6 1.6 合 轴 0.8 0.8 ~ 1.6 1.6 ~ 3.2
8
孔
热 轴 1.6
——
装 孔 1.6 ~ 3.2 ( 转 下 表 )
—— 第 1 页 ——
singing songs progress, and breaks down barriers to air, widely welcomed by the Japanese youth. Soon, the political team was held in town "25 rent" forum to promote rent, attended by KMT County Government, county offices, Yan Tomb District Government and representatives from all walks of the local youth. The meeting, the objections raised by the representatives of the County Committee, the two sides hotly debated. The local gentry and County Committee of the Kuomintang have attacked political team for unusual activity, Zhuang Shaozhen became a major goal. Renewed from the flag publications, organized anti-Japanese campaign, then to convene "25 rent" Forum, sparking a burst of publicity heat to promote youth war played a role. But the second wave of anti-communist, Kuomintang is mulling, wujiangludong, Lu XI two local forces took the opportunity to launch the "Shen" (the KMT County Chief Shen Liqun) activity, they shouted "County Government with the Communist party activities," created unprecedented tensions. Shen Liqun feel nervous, he was accused of "accommodate the alien parties" and deal with danger, prophesy and found no Communist Party in his County, and caused the storm to Zhuang Shaozhen to open the new identity. Between October, rumors in southwest area of Wujiang in tianmu mountain, "Black said. South Bureau and ordered the withdrawal of Sunan County owned lands, to youth task
( 续 前 表 )
分 组 公 差 ,m m
表 面 分 组 装 配
,2.5 2.5 5 10 20
的
轴 0.05 0.1 0.2 0.4 0.8 零 件 表 面
孔 0.1 0.2 0.4 0.8 1.6
径 向 跳 动 公 差 ,μm
表 面 定 心 精 度 高
2.5 4 6 10 16 20
的
轴 0.05 0.1 0.1 0.2 0.4 0.8 配 合 表 面
孔 0.1 0.2 0.2 0.4 0.8 1.6
公 差 等 级
表 面 液 体 润 滑
IT 6 ~ IT 9 IT 10 ~ IT 12 滑 动 轴 承
表 面 轴 0.4 ~ 0.8 0.8 ~ 3.2 0.1 ~ 0.4
孔 0.8 ~ 1.6 1.6 ~ 3.2 0.2 ~ 0.8
平 面 度 公 差 ,(μm,100 mm) 速 度
性 质 ,1/m?s ~ 6 10 20 60 ,60 导
~ 0.5 0.2 0.4 0.8 1.6 3.2 轨 滑 动
,0.5 0.1 0.2 0.4 0.8 1.6 面
~ 0.5 0.1 0.2 0.4 0.8 1.6
滚 动
,0.5 0.05 0.1 0.2 0.4 0.8
( 转 下 表 )
—— 第 2 页 —— singing songs progress, and breaks down barriers to air, widely welcomed by the Japanese youth. Soon, the political team was held in town "25 rent" forum to promote rent, attended by KMT County Government, county offices, Yan Tomb District Government and representatives from all walks of the local youth. The meeting, the objections raised by the representatives of the County Committee, the two sides hotly debated. The local gentry and County Committee of the Kuomintang have attacked political team for unusual activity, Zhuang Shaozhen became a major goal. Renewed from the flag publications, organized anti-Japanese campaign, then to convene "25 rent" Forum, sparking a burst of publicity heat to promote youth war played a role. But the second wave of anti-communist, Kuomintang is mulling, wujiangludong, Lu XI two local forces took the opportunity to launch the "Shen" (the KMT County Chief Shen Liqun) activity, they shouted "County Government with the Communist party activities," created unprecedented tensions. Shen Liqun feel nervous, he was accused of "accommodate the alien parties" and deal with danger, prophesy and found no Communist Party in his County, and caused the storm to Zhuang Shaozhen to open the new identity. Between October, rumors in southwest area of Wujiang in tianmu mountain, "Black said. South Bureau and ordered the withdrawal of Sunan County owned lands, to youth task
( 续 前 表 )
圆 锥 结 合 密 封 结 合 对 中 结 合 其 他
工 作 表 面 0.1 ~ 0.4 0.4 ~ 1.6 1.6 ~ 6.3
键 轴 上 键 槽 毂 上 键 槽 键 工作面 3.2 1.6 ~ 3.2 1.6 ~ 3.2
不动结合
结 非工作面 6.3 ~ 12.5 6.3 ~ 12.5 6.3 ~ 12.5 合 工作面 1.6 ~ 3.2 1.6 ~ 3.2 1.6 ~ 3.2
用导向键
非工作面 6.3 ~ 12.5 6.3 ~ 12.5 6.3 ~ 12.5
定 心 面 非 定 心 面
孔 槽 轴 齿
渐开线花键 孔 轴 孔 轴
结 合 不动结合 1.6~3.2 1.6~3.2 0.8~1.6 0.4~0.8 3.2~6.3 1.6~6.3
动结合 0.8~1.6 0.4~0.8 0.8~1.6 0.4~0.8 3.2 1.6~6.3
精 度 等 级
4、5 6、7 8、9 螺
紧 固 螺 纹 1.6 3.2 3.2 ~ 6.3 纹
结 在轴上、杆上和套上螺纹 0.8 ~ 1.6 1.6 3.2 合 丝杠和起重螺纹 —— 0.4 0.8
丝杠螺母和起重螺母 —— 0.8 1.6
( 转 下 表 )
—— 第 3 页 —— singing songs progress, and breaks down barriers to air, widely welcomed by the Japanese youth. Soon, the political team was held in town "25 rent" forum to promote rent, attended by KMT County Government, county offices, Yan Tomb District Government and representatives from all walks of the local youth. The meeting, the objections raised by the representatives of the County Committee, the two sides hotly debated. The local gentry and County Committee of the Kuomintang have attacked political team for unusual activity, Zhuang Shaozhen became a major goal. Renewed from the flag publications, organized anti-Japanese campaign, then to convene "25 rent" Forum, sparking a burst of publicity heat to promote youth war played a role. But the second wave of anti-communist, Kuomintang is mulling, wujiangludong, Lu XI two local forces took the opportunity to launch the "Shen" (the KMT County Chief Shen Liqun) activity, they shouted "County Government with the Communist party activities," created unprecedented tensions. Shen Liqun feel nervous, he was accused of "accommodate the alien parties" and deal with danger, prophesy and found no Communist Party in his County, and caused the storm to Zhuang Shaozhen to open the new identity. Between October, rumors in southwest area of Wujiang in tianmu mountain, "Black said. South Bureau and ordered the withdrawal of Sunan County owned lands, to youth task
( 续 前 表 )
精 度 等 级
3 4 5 6 7 8 9 10 11 齿 直齿、斜齿、人字 0.1 0.2 0.2 0.4 0.4 1.6 3.2 6.3 6.3 齿轮、蜗轮(圆柱) ~ 0.2 ~ 0.4 ~ 0.4 ~ 0.8 ~ 0.8 轮 0.2 0.4 0.4 0.8 1.6 3.2 圆 锥 齿 轮 — — 6.3 ~ 0.4 ~0.8 ~ 0.8 ~ 1.6 ~ 3.2 ~ 6.3 传 0.4 0.8 1.6 蜗杆牙型面 0.1 0.2 0.2 0.4 ~ 0.8 ~ 1.6 ~ 3.2 动
根 圆 和 工 作 面 同 或 接 近 的 更 粗 的 优 先 数
顶 圆 3.2 ~ 12.5
应 用 精 度
链
普 通 的 提 高 的 轮
工 作 表 面 3.2 ~ 6.3 1.6 ~ 3.2 传
根 圆 6.3 3.2 动
顶 圆 3.2 ~ 12.5 3.2 ~ 12.5 分度机构表面 定 位 精 度 ,μm 如:分度板 ~ 4 6 10 25 63 ,63
插 销 0.1 0.2 0.4 0.8 1.6 3 齿轮、链轮和蜗轮的非工作表面 3.2 ~ 12.5 孔和轴的非工作表面 6.3 ~ 12.5 倒角、倒圆、退刀槽等 3.2 ~ 12.5 螺栓、螺钉等用的通孔 25
( 转 下 表 )
singing songs progress, and breaks down barriers to air, widely welcomed by the Japanese youth. Soon, the political team was held in town "25 rent" forum to promote rent, attended by KMT County Government, county offices, Yan Tomb District Government and representatives from all walks of the local youth. The meeting, the objections raised by the representatives of the County Committee, the two sides hotly debated. The local gentry and County Committee of the Kuomintang have attacked political team for unusual activity, Zhuang Shaozhen became a major goal. Renewed from the flag publications, organized anti-Japanese campaign, then to convene "25 rent" Forum, sparking a burst of publicity heat to promote youth war played a role. But the second wave of anti-communist, Kuomintang is mulling, wujiangludong, Lu XI two local forces took the opportunity to launch the "Shen" (the KMT County Chief Shen Liqun) activity, they shouted "County Government with the Communist party activities," created unprecedented tensions. Shen Liqun feel nervous, he was accused of "accommodate the alien parties" and deal with danger, prophesy and found no Communist Party in his County, and caused the storm to Zhuang Shaozhen to open the new identity. Between October, rumors in southwest area of Wujiang in tianmu mountain, "Black said. South Bureau and ordered the withdrawal of Sunan County owned lands, to youth task
—— 第 4 页 ——
( 续 前 表 )
精制螺栓和螺母 3.2 ~ 12.5 半精制螺栓和螺母 25 螺钉头表面 3.2 ~ 12.5 压簧支承表面 12.5 ~ 25 准备焊接的倒棱 50 ~ 100 床身、箱体上的槽和凸起 12.5 ~ 25 在水泥、砖或木质基础上的表面 100或更大 对疲劳强度有影响的非结合表面 0.2 ~ 0.4抛光
特 别 精 密 0.2抛光 影响蒸汽和气流的表面
一 般 0.8 ~ 1.6
~ 180 mm 1.6 ~ 3.2 影响零件平衡的表面 直径 180 ~ 500 mm 6.3
,500 mm 15.2 ~ 52
附图:斜槽轮零件样品
singing songs progress, and breaks down barriers to air, widely welcomed by the Japanese youth. Soon, the political team was held in town "25 rent" forum to promote rent, attended by KMT County Government, county offices, Yan Tomb District Government and representatives from all walks of the local youth. The meeting, the objections raised by the representatives of the County Committee, the two sides hotly debated. The local gentry and County Committee of the Kuomintang have attacked political team for unusual activity, Zhuang Shaozhen became a major goal. Renewed from the flag publications, organized anti-Japanese campaign, then to convene "25 rent" Forum, sparking a burst of publicity heat to promote youth war played a role. But the second wave of anti-communist, Kuomintang is mulling, wujiangludong, Lu XI two local forces took the opportunity to launch the "Shen" (the KMT County Chief Shen Liqun) activity, they shouted "County Government with the Communist party activities," created unprecedented tensions. Shen Liqun feel nervous, he was accused of "accommodate the alien parties" and deal with danger, prophesy and found no Communist Party in his County, and caused the storm to Zhuang Shaozhen to open the new identity. Between October, rumors in southwest area of Wujiang in tianmu mountain, "Black said. South Bureau and ordered the withdrawal of Sunan County owned lands, to youth task
—— 第 5 页 ——
singing songs progress, and breaks down barriers to air, widely welcomed by the Japanese youth. Soon, the political team was held in town "25 rent" forum to promote rent, attended by KMT County Government, county offices, Yan Tomb District Government and representatives from all walks of the local youth. The meeting, the objections raised by the representatives of the County Committee, the two sides hotly debated. The local gentry and County Committee of the Kuomintang have attacked political team for unusual activity, Zhuang Shaozhen became a major goal. Renewed from the flag publications, organized anti-Japanese campaign, then to convene "25 rent" Forum, sparking a burst of publicity heat to promote youth war played a role. But the second wave of anti-communist, Kuomintang is mulling, wujiangludong, Lu XI two local forces took the opportunity to launch the "Shen" (the KMT County Chief Shen Liqun) activity, they shouted "County Government with the Communist party activities," created unprecedented tensions. Shen Liqun feel nervous, he was accused of "accommodate the alien parties" and deal with danger, prophesy and found no Communist Party in his County, and caused the storm to Zhuang Shaozhen to open the new identity. Between October, rumors in southwest area of Wujiang in tianmu mountain, "Black said. South Bureau and ordered the withdrawal of Sunan County owned lands, to youth task
范文二:表面光洁度与粗糙度Ra、Rz数值换算表
表面光洁度与粗糙度,,、,,数值换算表
, 轮廓的平均算术偏差(R):通过零件的表面轮廓作一中线 m ,将一定长度的轮廓分成两a
部分,使中线两侧轮廓线与中线之间所包含的面积相等,
, 不平度平均高度(Rz):就是在基本测量长度范围内,从平行于中线的任意线起,自被测
轮廓上五个最高点至五个最低点的平均距离,
, 轮廓最大高度Ry:就是在取样长度内,轮廓峰顶线和轮廓谷底线之间的距离。
间距参数共有两个:
1. 轮廓单峰平均间距S,就是在取样长度内,轮廓单峰间距的平均值。而轮廓单峰
间距,就是两相邻轮廓单峰的最高点在中线上的投影长度Si。
2. 轮廓微观不平度的平均间距Sm:含有一个轮廓峰和相邻轮廓谷的一段中线长度
Smi,称轮廓微观不平间距。
综合参数只有一个,就是轮廓支承长度率tp。它是轮廓支承长度np与取样长度l之比。
在原有的国家标准中,表面光洁度分为14级,其代号为 1、2……14。后的数字越大,表面光洁度就越高,即表面粗糙度数值越小。
在车间生产中,常根据表面粗糙度样板和加工出来的零件表面进行比较,用肉眼或手指的感觉,来判断零件表面粗糙度的等级。此外,还有很多测量光洁度的仪器。
表面粗糙度对零件使用情况有很大影响。一般说来,表面粗糙度数值小,会提高配合质量,减少磨损,延长零件使用寿命,但零件的加工费用会增加。因此,要正确、合理地选用表面粗糙度数值。 在设计零件时,表面粗糙度数值的选择,是根据零件在机器中的作用决定的。总的原则是:
在保证满足技术要求的前提下,选用较大的表面粗糙度数值。具体选择时,可以参考下述原则:
(1)工作表面比非工作表面的粗糙度数值小。
(2)摩擦表面比不摩擦表面的粗糙度数值小。摩擦表面的摩擦速度愈高,所受的单位压力愈大,则应愈高;滚动磨擦表面比滑动磨擦表面要求粗糙度数值小。
(3)对间隙配合,配合间隙愈小,粗糙度数值应愈小;对过盈配合,为保证连接强度的牢固可靠,
载荷愈大,要求粗糙度数值愈小。一般情况间隙配合比过盈酝合粗糙度数值要小。
(4)配合表面的粗糙度应与其尺寸精度要求相当。配合性质相同时,零件尺寸愈小,则应粗糙度数值愈小;同一精度等级,小尺寸比大尺寸要粗糙度数值小,轴比孔要粗糙度数值小(特别是IT8,IT5的精度)。
(5)受周期性载荷的表面及可能会发生应力集中的内圆角、凹稽处粗糙度数值应较小。
(单位:μ,)
表面光洁度 ?1 ?2 ?3 ?4 ?5 ?6 ?7
,, 50 25 12.5 6.3 3.2 1.60 0.80 表面粗糙度 ,, 200 100 50 25 12.5 6.3 6.3 表面光洁度 ?8 ?9 ?10 ?11 ?12 ?13 ?14
,, 0.40 0.20 0.100 0.050 0.025 0.012 - 表面粗糙度 ,, 3.2 1.60 0.80 0.40 0.20 0.100 0.050
范文三:表面光洁度与粗糙度Ra、Rz数值换算表
表面光洁度与粗糙度Ra、Rz数值换算表
(1)轮廓算术平均偏差R。图1中,以中线为基准线,在取样长度l内轮廓峰高的平均值和轮廓谷a
深的平均值之和作为轮廓微观不平度的平均高度。一般优先选用轮廓算术平均偏差R表示。 a(2)微观不平度十点高度R。图2取自文献[3],基准线为算术平均中线。在取样长度l内,5个z
最大的轮廓峰高Y的平均值和5个最大的轮廓谷深Y的平均值即为微观不平度十点高度值R。 puz
表面光洁度与粗糙度Ra、Rz数值换算表 (单位:μm)
表面光洁度 ?1 ?2 ?3 ?4 ?5 ?6 ?7 Ra 50 25 12.5 6.3 3.2 1.60 0.80
Rz 200 100 50 25 12.5 6.3 6.3
表面光洁度 ?8 ?9 ?10 ?11 ?12 ?13 ?14 Ra 0.40 0.20 0.100 0.050 0.025 0.012 – Rz 3.2 1.60 0.80 0.40 0.20 0.100 0.050
范文四:光洁度与粗糙度Ra Rz数值对照换算表
表面粗糙度 R a ,R z 数值与光洁度对照换算关系
表面粗糙度(光洁度)仪
光洁度与粗糙度Ra、Rz数值对照换算表 (单位:μm)
表面光洁度 ▽1▽2▽3▽4▽5▽6▽7Ra 502512.56.33.21.600.80表面 粗糙度
Rz
200100502512.56.36.3表面光洁度 ▽8▽9▽10▽11▽12▽13▽14Ra 0.400.200.1000.0500.0250.012-表面 粗糙度
Rz
3.2
1.60
0.80
0.40
0.20
0.100
0.050
另附:表面粗糙度国际标准
加工工具(方 法)
标准等 级代号 表面粗 糙度
粗 研 磨 砂 粒 粒 度 精 研 磨 砂 粒 粒 度
钻 石 膏 抛 光 加工材料及硬度要求 光度描述
S13654HRC SPI(A1)Ra0.005840752HRC 光洁度非常高,镜 面效果
DF-258HRC SPI(A2)Ra0.01
XW-1060HRC 光洁度较低,没有 砂纸纹
S136300HB SPI(A3)Ra0.02
718SUPREME 300HB 光洁度更低一级, 但没有砂纸纹
SPI(B1)Ra0.05没有光亮度,有轻 微 3000#砂纸纹 SPI(B2)Ra0.1没有光亮度,有轻 微 2000#砂纸纹 SPI(B3)Ra0.2没有光亮度,有轻 微 1000#砂纸纹 不辨加工痕迹的方 向
Ra0.4精加工:精车 \精刨\精 铣\磨\铰 \刮 微辨加工痕迹的方 向
Ra0.8精加工:精车 \精刨\精 铣\磨\铰 \刮 可辨加工痕迹的方 向
Ra1.6 Ra3.2 Ra6.3 Ra12.5 Ra25 Ra50
范文五:光洁度与粗糙度Ra、Rz数值对照换算表
光洁度与粗糙度,,、,,数值对照换算表(单位:μ,)
表面光洁度 ?1 ?2 ?3 ?4 ?5 ?6 ?7
,, 50 25 12.5 6.3 3.2 1.60 0.80
表面
粗糙度 ,, 200 100 50 25 12.5 6.3 6.3
表面光洁度 ?8 ?9 ?10 ?11 ?12 ?13 ?14
,, 0.40 0.20 0.100 0.050 0.025 0.012 - 表面 粗糙度 ,, 3.2 1.60 0.80 0.40 0.20 0.100 0.050
另附:表面粗糙度国际标准
标准等表面粗加工工具(方加工材料及硬度要求 光度描述 级代号 糙度 法)
粗精钻
研研石
磨磨膏
砂砂抛
粒粒光
粒粒
度 度
SPI(A1) Ra0.005 S136 54HRC 光洁度非常高,镜
面效果 8407 52HRC
SPI(A2) Ra0.01 DF-2 58HRC 光洁度较低,没有
砂纸纹 XW-10 60HRC
SPI(A3) Ra0.02 S136 300HB 光洁度更低一级,
但没有砂纸纹 718SUPREME 300HB
SPI(B1) Ra0.05 没有光亮度,有轻
微3000#砂纸纹
SPI(B2) Ra0.1 没有光亮度,有轻
微2000#砂纸纹
SPI(B3) Ra0.2 没有光亮度,有轻
微1000#砂纸纹
不辨加工痕迹的方
向
Ra0.4 精加工:精车 微辨加工痕迹的方
,精刨,精 向
铣,磨,铰
,刮
Ra0.8 精加工:精车 可辨加工痕迹的方
,精刨,精向
铣,磨,铰
,刮
Ra1.6
Ra3.2
Ra6.3
Ra12.5
Ra25
Ra50