Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document replaces GB/T 20317-2006 Fused deposition modeling machines - Testing of the accuracy and GB/T 20318-2006 Fused deposition modeling machines - Parameters. In addition to structural adjustments and editorial, the following main technical changes have been made with respect GB/T 20317-2006 and GB/T 20318-2006:
——The clause "Structure and parameters" has been added; the specific parameters of X, Y and Z axis stroke, table width, table length and nozzle diameter of sprayer have been deleted, and the relative size requirements of forming platform size and motion axis stroke have been added (see Table 1 of Clause 4 in GB/T 20318-2006);
——General requirements for "machine tool leveling", "diagram", "software compensation" and "machining accuracy inspection" have been added (see 5.3, 5.7, 5.8 and 5.11);
——The X and Y coordinate directions of X-axis motion straightness inspection have been modified (see item G1 of 6.1 hereof; item G1 of 5.1 in GB/T 20317-2006);
——The inspection steps in geometric accuracy inspection and positioning accuracy inspection (see Clauses 6 and 7 hereof; Clauses 5 and 6 in GB/T 20317-2006);
——The structure of the clause "Machining accuracy inspection" have been modified, and Annex A has been deleted; the processing conditions and testing methods of specimens have been added, and the statistical analysis methods and confidence indexes of results have been modified (see Clause 8 hereof; Clause 7 Annex A of GB/T 20317-2006).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by China Machinery Industry Federation.
This document is under the jurisdiction of SAC/TC 161 National Technical Committee on Non-traditional Machine Tools of Standardization Administration of China.
The previous editions of this document are as follows:
——GB/T 20317, which was first issued in 2006.
——GB/T 20318, which was first issued in 2006.
——This edition is the first revision.
Introduction
GB/T 20317-2006 Fused deposition modeling machines - Testing of the accuracy and GB/T 20318-2006 Fused deposition modeling machines - Parameters are the earliest national standards for accuracy inspection of machine tools in additive manufacturing industry in China. After more than a decade of technical development, the accuracy inspection and parameters of fused deposition rapid forming machine tools are gradually defined and standardized with the popularization of product application and the improvement of technology maturity. This document integrates and revises the 2006 edition of the standard in terms of machine structure, parameters and accuracy, taking into account the current needs of design, production and use of fused extrusion and deposition forming machine tools.
Fused extrusion and deposition modeling machines - Testing of the accuracy
1 Scope
This document specifies the structure and parameters, general rules, geometric accuracy inspection, positioning accuracy inspection and machining accuracy inspection of fused extrusion and deposition forming machine tools. Tolerance values corresponding to the above tests are also given in this document.
This document is applicable to the accuracy inspection of fused extrusion and deposition forming machine tools.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 14896.7 Non-traditional machines - Terminology - Part 7: Additive manufacturing machines
GB/T 17421.1-2023 Test code for machine tools - Part 1: Geometric accuracy of machines operating under no-load or quasi-static conditions
GB/T 17421.2 Test code for machine tools - Part 2: Determination of accuracy and repeatability of positioning of numerically controlled axes
GB/T 19764-2005 Guide to the choice of series of preferred numbers and of series containing more rounded values of preferred numbers
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 14896.7 apply.
4 Construction and parameters
4.1 Figure 1 shows the structure of fused extrusion and deposition forming machine tool (hereinafter referred to as "machine tool").
4.2 The R'10 series (common ratio of 1.25) in GB/T 19764-2005 is preferred when designing the strokes in X, Y and Z axes.
Foreword i
Introduction iii
1 Scope
2 Normative references
3 Terms and definitions
4 Construction and parameters
5 General
6 Geometric accuracy inspection
7 Positioning accuracy inspection
8 Machining accuracy inspection
Figure 1 Schematic diagram of machine structure
Figure 2 Specimen structure and size schematic
Table 1 Summary table of dimensional accuracy of specimen
Table 2 Statistical table of deviation frequency
