GB/T 21952-2023Polycristalline diamond inserts, tipped - Dimensions, types (English PDF)

8.731 (see Table 1, Table 1 of the.2008 edition);

e) The l value of codes SP.N090302F, SP.N090304F, SP.N090308F is changed from 9.5 to 9.525 (see Table 4,

Table 4 of the.2008 edition);

f) The m1 value of code CP.W09T302F was changed from 2.426 to 2.534, and the m2 value was changed from 1.333 to 1.392; code name CP.

The m1 value of W120404F was changed from 3.088 to 3.308, and the m1 value of code CP.W120408F was changed from 3.308 to

3.088 (see Table 5,.2008 version of Table 5);

g) The code name SE.W1204EDR is changed to SP.W1204EDR, and the code name SE.W1204EDL is changed to SP.W1204EDL (see

Table 8,.2008 version of Table 8).

This document has been modified to adopt ISO 16463.2014 "Dimensions and Types of Inlaid Polycrystalline Diamond Blades".

A "Terms and Definitions" chapter has been added to this document.

The technical differences between this document and ISO 16463.2014 and their reasons are as follows.

---The normal relief angle is increased by 15° (D) (see 4.2), which is covered in Tables 8 and 9;

---The tool tip arc radius is increased by 0.1mm (see 4.3), which is covered in Table 10;

---Replaced ISO 1832 (see 4.4~4.6, 5.1) with the normatively quoted GB/T 2076 to adapt to my country's technical conditions;

---The material code DP05 is changed to DP (see 5.2 and 5.3) to facilitate the use of this document;

---Replaced ISO 513 (see 5.2, 5.3, Chapter 8 and Chapter 10) with the normatively quoted GB/T 2075 to adapt to my country's technology

technical conditions;

---Change the notes in 6.1~6.10 to requirement clauses to facilitate the use of this document;

---The m value of code TP.W110208F was changed from 9.322 to 8.731 (see Table 1), and the value is wrong;

---The l value of the codes SP.N090302F, SP.N090304F and SP.N090308F was changed from 9.5 to 9.525 (see Table 4).

The value is wrong;

---The m1 value of code CP.W09T302F is changed from 2.426 to 2.534, the m2 value is changed from 1.333 to 1.392, code CP.

The m1 value of W120404F was changed from 3.088 to 3.308, and the m1 value of code CP.W120408F was changed from 3.308 to

3.088 (see Table 5), the value is wrong;

---Replaced ISO 6987 and ISO 3365 (see Chapter 9) with normative references GB/T 2080 and GB/T 2081 respectively, to

Adapt to my country's technical conditions.

The following editorial changes have been made to this document.

---In order to coordinate with the existing standards, the name of the standard is changed to "Types and Dimensions of Inlaid Polycrystalline Diamond Blades";

---For ease of use, ISO 883 and ISO 6987 are replaced with the informative GB/T 2079 and GB/T 2080 (see Section 1

Chapter), replacing ISO 1832 with the informative reference GB/T 2076 (see 5.2 and 5.3);

---For ease of use, change the symbols "alpha and alpha'n" in Table A.1 to "alpha'n", and refer to the corresponding references in this document to "Figure 6, Figure 7, Table 6,

Table 7" is changed to "Figure 8, Figure 9, Table 8, Table 9";

---Added references.

Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.

4.1 Blade shape

The shapes of the blades are. triangle (T), square (S), rhombus 80° (C), rhombus 55° (D), rhombus 35° (V), and convex triangle (W).

4.2 Normal relief angle alphan

The normal relief angles alphan are. 5° (B), 7° (C), 11° (P), 15° (D) and 20° (E).

4.3 Cutting edge tip

Turning inserts. with tip radius repsilon. 0.1mm, 0.2mm, 0.4mm, 0.8mm, 1.2mm and

1.6mm.

Milling insert. with wiper edge.

Note. The tool tip structure that does not participate in cutting is optional.

4.4 Tolerance classes

The tolerance level should be in accordance with GB/T 2076.In Tables 1 to 10, the tolerance grade codes are represented by black dots (.).