A324140-06-2007-A-中文-未注塑料件公差

PSA 标致－雪铁龙集团

通用标准

A32 4140

未注公差 塑料件

页码 1/8

无使用限制

前言

本标准依据标准NF T58-000（87）而建立，但并不与本标准完全一致。

编制 FARGES Serge DTI/DPMO/ISIM/INM/MEMM

LEROUGE Nicolas DTI/DITV/QMS/MSM/TMT

签字 日期

18/06/2007

参加人员见下页的清单

审核 批准 LERICHE Roland DTI/DPMO/ISIM/INM/MEMM DAUBENFELD François DTI/DITV/QMS/MSM/TMT 日期 签字

18/06/2007

日期

18/06/2007

签字

标准演变 版本号

日期 修订内容

制订本标准 格式标准化，并确定标准内容 参加人员

以下人员参与了本标准的编制和或审核：

DTI/DITV/RHN/NCF P. SELLIER

目录

主题内容······································································································································································3 1.1适用范围····································································································································································3 2.引用文件···········································································································································································3 2.1 标准···········································································································································································3 2.2 法规···········································································································································································3 2.3 其它···········································································································································································3 2.4 文件上的表达方式····················································································································································3 3.术语和定义·······································································································································································4 3.1 定义···········································································································································································4 3.2 缩略语·······································································································································································4 4. 尺寸公差各级的定义···················································································································································4 4.1 1级公差································································································································································5 4.2 2级公差································································································································································5 4.3 3级公差································································································································································6 4.4 4级公差································································································································································6 4.5 倒圆、斜面、圆角半径·······································································································································7 4.6 角··········································································································································································7 4.7 拢模斜度：从0°30’到1°30’·······························································································································7 4.8 几何公差·······························································································································································8 5 特殊情况······································································································································································8 5.1毛边············································································································································································8 5.2浇注口········································································································································································8 1

1 主题内容

本标准规定了塑料成品件的一般公差，用于非功能的线性或角度的尺寸，以及几何位置的未注公差。 注：如果对公差的要求较本标准更加严格或宽松，则应在图纸上标注清楚（见标准A32 4100）。

1.1适用范围

1.1 本标准适用于非功能尺寸，拢模斜度，合模面、筋板等的未注公差。 1.2 所涉及的零件为模压、转换或注塑的，热塑或热固性的塑材件。

本标准不适用于栅孔或轻化的塑料零件。 1.3 这类公差取决于三个基本因素：

z 材料系列； z 加工条件；

z 诸如温度和湿度影响下的回缩、尺寸变化等副作用。

尺寸测量应在冷却（至少48小时）之后，在鉴定或验审等老化周期之前进行。对于晶状体聚合物之类的某些材料，尺寸的测定在改善（稳定尺寸、恢复湿度等）之后实行。

大气参考数据：20°C±5°C和50%±10%HR

1.4 本标准不对形状公差、螺纹加工定位公差以及齿形公差进行定义。

2.引用文件

2.1 标准

标准号 名称

A32 2100 形位公差 概述

A32 4100 未注公差 概述

2.2 法规

无内容.

2.3 其它

无内容.

2.4 文件上的表达方式

在零件图纸的边框侧，指出了：

未注公差：标准A32 4140 分类：_（根据第4节）

3.术语和定义

技术采购及项目平台部(DPTA)使用的主要术语及定义的专业字典可以通过DPTA内网(网址:http://nectar .inetpsa.com)查询。此专业字典的内容逐步得以完善。

3.1 定义

根据本标准的需求，定义以下术语。 无内容。

3.2 缩略语

根据本标准的需求，定义以下地缩略语。 无内容。

4. 尺寸公差各级的定义

塑料件的制造应按照渐进严格的顺序，满足三个公差级别的需要。

当由一个级别向另一个级别转变时，应改变材料的系列，并更加严格地控制生产。 1. 1级公差 2. 2级公差 3. 3级公差

最后一级别的公差的特殊使用：

4. 尺寸上具有细微差异的4级“高度精确”公差，它有：

z 合适的材料； z 精密器械的使用； z 工装的严格设计；

z 对生产和设施的严格控制；

z 在废弃、挑选或恢复加工的极大风险问题上对称职人力的利用。

一般原则上来讲，建议使用1级公差，这一公差使材料间的标准化和互换性具备最大的可能性。

4.1 1级公差

长度、直径和半径见下列尺寸公差表。

不包括合模面的尺寸误差（见（*））

尺寸 (mm)

误差 (mm)

尺寸 (mm)

误差 (mm)

（*）对于合模面或导槽面，应将所有的误差增加±0.30mm（见以下举例）。 例如：

1006 mm的尺寸：1000＜a≤1300 差异：±5.50

±0.30=

±5.80

4.2

2级公差

长度、直径和半径尺寸公差表

不包括合模面的尺寸误差（见（*））

尺寸 (mm)

误差 (mm)

尺寸 (mm)

误差 (mm)

（*）对于合模面或导槽面，应将所有的误差增加±0.25mm。

4.3 3级公差

长度、直径和半径尺寸表

不包括密封面的尺寸误差（见（*））

尺寸 (mm)

误差 (mm)

尺寸 (mm)

误差 (mm)

（

*）对于密封面或导槽面，应将所有的误差增加±

0.10mm。

4.4 4级公差

适用于高度精确的，热塑或热固性技术零件。

表A：不包括合模面的尺寸误差

尺寸 (mm)

误差 (mm)

尺寸 (mm)

误差 (mm)

表B：包括合模面或导槽面的尺寸误差

尺寸 (mm)

误差 (mm)

尺寸 (mm)

误差 (mm)

4.5 倒圆、斜面、圆角半径

±25%的名义价值，误差圆整增加1/10。 例如：

1. 5±0.4

4.6 角

对于角的△α差异，取较大尺寸作为参考基础来进行测量（见如下图1）。

L

正常级

精确级

图1

4.7 拢模斜度：从0°30’到1°30’

除了不同的标注外，在图纸上：

5. 对于凸出或外部部分，其斜度在所指尺寸以内，此时公差仅取最大部分（见图2，）； 6. 对于内凹或内部部分，其斜度在所指尺寸以外，此时公差仅取最小部分（见图2，）。

图2

4.8 几何公差

这类公差在图纸中的标注方法在标准A32 2100中已作描述，并附有供查询的示例。

4.8.1 形状、位置、方向

直线度、平面度及圆度特征的公差用最大的差异来表示。

这一差异的值对应于公差的半区间，它重新采用表中所指值，但不带符号。

例如：直径为35mm的零件所容许的圆度误差，依据2级公差，其公差为0.20mm。

5 特殊情况

5.1毛边

合模或注塑压痕误差的凸出部分不应超过0.20mm。

5.2浇注口

凸出或内凹值依据所选的消除方式（切削或截断）而定，不需要在图纸上进行补充说明：±0.20mm。