Tabular layouts of properties - Part 90: Tool holders for indexable inserts
1Key Takeaways
This specification defines the characteristics of standard and non-standard clamping shanks and cutting heads for indexable inserts. These tools may be adjustable or non-adjustable.
2Expert Interpretation
This article provides an in-depth interpretation of the DIN 4000-90:2021 standard, covering the layout of the characteristic tables for indexable insert toolholders, technical parameter classification, data structure specifications, and implementation requirements. It also provides detailed analysis of the standard's updated content, characteristic parameter definitions, MCO system conversion, and ISO 13399 data exchange specifications, providing professional guidance for tool manufacturers and users.
DIN 4000-90 Standard Overview and Technological Evolution
DIN 4000-90:2021 "Characteristic Table Layout Part 90: Indexable Insert Holders" is an important tool standard issued by the German Institute for Standardization (DIN), replacing the 2011 edition of the standard. This standard belongs to the ICS 21.020 and 25.060.20 classifications, and specifically specifies the characteristic table layout requirements for clamping shanks and tool heads for indexable inserts.
Analysis of the main updates to the standard
Compared with the 2011 edition, the new version of the standard has undergone 14 major technical revisions:
| Revisions | 2011 Edition | 2021 Edition | Technical Impact |
|---|---|---|---|
| Scope of Application | Includes Short Clamping Shank | Removes Short Clamping Shank | Clearer Division of Specialization |
| Basic Forms | Dispersed Description | Merged into Section 5.1, Adds 4 New Basic Forms | Improves Classification System |
| Feature List | Table 1 Contains Fewer Features | Deletes Some Features, Adds New Features, Adds Table 2 | Data Description Is More Accurate |
| Conformity Classification | Traditional Classification | Conversion to the MCO System (Chapter 6) | Alignment with International Standards |
| Data Structure | No Block Structure Specification | New Section 5.4 Block Structure Specification | Support for Complex Tool Description |
In-Depth Analysis of the Characteristic Parameter System
Geometric Parameter Classification System
The standard divides toolholder characteristic parameters into six major categories:
Class A - Functional Dimension Parameters
Angle parameter definition specification
The standard strictly follows DIN 6581 and ISO 3002-1 to define tool angle parameters:
- E4 Orthogonal rake angle: symbol γo, measured in the orthogonal plane
- E5 Inclination angle: symbol λs, measured in the cutting plane
- E6 Axial rake angle: symbol γp, measured in the axial plane
- E7 Radial rake angle: symbol γf, measured in the radial plane
Data exchange and block structure implementation
Significance of MCO system conversion
Chapter 6 of the standard converts the consistency level into the MCO (mandatory, conditional, optional) system, which is an important step in aligning with the international standard ISO 13399. The MCO classification clarifies the necessity of each characteristic in data exchange:
- M (Mandatory): Characteristics that must be included in the object description
- C (Conditional): Characteristics that depend on the existence of other characteristics or elements
- O (Optional): Supplementary characteristics of the object description
Block structure technology implementation
The block structure mechanism introduced in Section 5.4 supports the description of multi-cutting edge tools:
| Element | Function | Example |
|---|---|---|
| IND index | Identifies a repeated block instance | When D11=2, IND=1,2 |
| LOC position | Specifies the cutting edge installation position | CSW2_1 represents the first position of the second coordinate system |
| Characteristic block | Groups related characteristic parameters | Cutting edge block includes A1, A12, A2, etc. |
ISO 13399 data exchange integration
Fully supports ISO/TS Data exchange requirements for the 13399 series of standards: Identifier mapping: J21 identifies the order number and maps it to ID13000 in ISO/TS 13399-72, corresponding to item.id in ISO 13399-1; J22 maps the product name to ID13001, corresponding to item.name; and J23 maps the product description to ID13002, corresponding to item.description. Separation point coding: J41 and J61 provide separation point coding based on DIN 4000-95 and ISO/TS 13399-60, respectively, to ensure compatibility with both legacy and modern data systems.
Implementation Recommendations and Application Guide
Key Points for Manufacturers
1. Data Model Reconstruction: Reconstruct the product data model according to the MCO classification to ensure the integrity of mandatory features
2. Block Structure Application: Use a block structure description for multi-edge tools, using the IND index to distinguish different cutting edges
3. Interface Standardization: Unify the use of standard-defined interface codes (C11-C16) and toolholder type codes (C13)
User Selection Guide
1. Precision Matching: Select the appropriate tolerance grade (C16) based on machining accuracy requirements
2. Rigidity Assessment: Evaluate system rigidity using overhang length (A31) and toolholder parameters (C3-C5)
3. Cooling Optimization: Select the coolant inlet (H21) and outlet (H22) configuration based on the material being processed. Technology Trend Outlook: The release of DIN 4000-90:2021 reflects the key development directions of tool standardization: Digital Integration: Full support for the ISO 13399 data exchange standard provides fundamental data specifications for digital manufacturing and Industry 4.0. Specialization: The removal of short clamping shanks and the focus on standard clamping shanks and tool heads reflects the professionalization trend of the standards system. International Harmonization: The introduction of the MCO system and the widespread reference to ISO standards promote the unification and coordination of global tool standards. This standard provides a complete technical specification system for the design, manufacture, selection, and data exchange of indexable insert shanks, which is of great significance for improving the standardization level and digital transformation of the tool industry.