GB/T 15306.1-2008 in English

《GB/T 15306.1-2008陶瓷可转位刀片 第1部分：无孔刀片尺寸（G级）》由TC91（全国刀具标准化技术委员会）归口，主管部门为中国机械工业联合会。
GB/T 15306《陶瓷可转位刀片》分为四个部分，本部分为GB/T 15306的第1部分。
本部分修改采用ISO 9361-1：1991《切削刀具用可转位刀片 刀尖倒圆陶瓷可转位刀片 第1部分：无孔刀片尺寸》（英文版）。
本部分根据ISO 9361-1：1991重新起草。
本部分是对GB/T 15306.1-1994《陶瓷可转位刀片 无孔刀片尺寸（G级）》的修订。
本部分代替GB/T 15306.1-1994。本部分规定了刀尖倒圆、无固定孔、法向后角为0°和11°、精度为G级、用陶瓷切削材料制成的可转位刀片的尺寸。这些刀片主要从顶部夹紧在车刀和镗刀刀杆上。本部分适用于用各种陶瓷切削材料制成的G级无孔可转位刀片。陶瓷切削材料由各种不同的氧化物、氮化物和碳化物及金属等组成，例如：这类陶瓷材料有：氧化物陶瓷（主要由氧化铝Al2O3组成）、氧化物-碳化物陶瓷（主要由氧化铝和其他材料如碳化钛TiC组成）、氮化物陶瓷（一般由氮化硅Si3N4和其他材料如氧化钇Y2O3及氧化铝组成）。 本部分与1GB/T 15306.1-1994相比主要变化如下：
――取消了原标准5.1中的文字：也可选用K、P型；
――修改了切削刃截面形状符号S、K（原标准5.2图1切削刃截面形状符号S修改为K，符号K修改为S）；
――增加了切削刃截面形状符号K（原标准5.2图2）；
――修改了侧视图里的角度（原标准8.1图4中的角度11°修改为11°±1°）；
――修改了侧视图里的角度（原标准8.2图6中的角度11°修改为11°±1°）；
――修改了标记示例（原标准第9章标记示例中的牌号修改为材料代号）；
――修改了附录A的计量器具名称（原附录A中的块规修改为量块、千分表修改为指示表）。

Indexable Inserts for Cutting Tools — Ceramic Inserts with Rounded Corners — Part 1: Dimensions of Inserts without Fixing Hole (Class G)

1 Scope

This part of GB/T 15306 specifies the dimensions of indexable ceramic inserts with rounded corners, without fixing hole, with 0° and 11° normal clearance, and with accuracy of Class G. These inserts are primarily intended to be mounted by top clamping on turning and boring tools.

This part is applicable to the indexable ceramic inserts with rounded corners, without fixing hole (Class G).

Ceramic cutting materials consist of a variety of oxides, nitrides, carbides and metals. Such ceramic materials are, for example, oxide ceramics (consisting primarily of aluminium oxide Al2O3), carboxide ceramics (consisting generally of a mixture of aluminium oxide and other materials such as titanium carbide TiC) and nitride ceramics (consisting generally of a mixture of silicon nitride and other materials, such as yttrium oxide Y2O3 and aluminium oxide).

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 15306. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.

GB/T 2075 Classification and Application of Hard Cutting Materials for Metal Removal with Defined Cutting Edges — Designation of the Main Groups and Groups of Application (GB/T 2075-2007, ISO 513:2004, IDT)
GB/T 2076 Indexable Inserts for Cutting Tools — Designation (GB/T 2076-2007, ISO 1832:2004, MOD)
GB/T 15306.4 Indexable Inserts for Cutting Tools — Ceramic Inserts with Rounded Corners — Part 4: Specifications

3 Types of Inserts

The types of indexable ceramic inserts specified in this part are the following:

TN: triangular inserts, with 0° normal clearance;

TP: triangular inserts, with 11° normal clearance;

SN: square inserts, with 0° normal clearance;

SP: square inserts, with 11° normal clearance;

CN: rhombic inserts, with 0° normal clearance and 80° included angle;

DN: rhombic inserts, with 0° normal clearance and 55° included angle;

RN: round inserts, with 0° normal clearance.

Inserts dealt with in this part are standardized without chip breakers.

In general, the inserts are used with chamfered or rounded cutting edges, see Clause 5.

Table B.1 gives the range of sizes for the inserts (see Annex B).

4 Tolerances

The indexable ceramic inserts which are the subject of this part are provided in tolerance class G, in accordance with GB/T 2076.

The values of the tolerances in accordance with GB/T 2076 are given in Table 2 to Table 5 for the insert dimensions.

5 Cutting Edge

5.1 Cutting edge condition

Foreword II
1 Scope
2 Normative References
3 Types of Inserts
4 Tolerances
5 Cutting Edge
6 Designation and Marking
7 Measurement
8 Recommended Dimensions
9 Example of Marking
10 Specifications
Annex A (Informative) Method of Measurement of Dimension m
Annex B (Informative) Range of Sizes of Inserts with Rounded Corners, without Fixing Hole, Having Shapes Covered by This Standard