GB/Z 18620.1-2025Code of inspection practice - Part 1: Measurement of cylindrical gear tooth flanks (English PDF)

Foreword

This document is a report-type guidance technical document.

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.

This document is Part 1 of GB /Z 18620 "Specifications for Inspection Implementation". GB /Z 18620 has the following parts published.

---Inspection Implementation Specification Part 1: Measurement of Cylindrical Gear Tooth Surface;

---Spiral Gear Inspection Implementation Specification Part 2: Inspection of Radial Composite Deviation, Radial Runout, Tooth Thickness and Backlash;

---Specifications for Inspection of Cylindrical Gears, Part 3: Inspection of Gear Blanks, Shaft Center Distance, and Axis Parallelism;

---Specifications for Inspection of Cylindrical Gears, Part 4: Inspection of Surface Structure and Tooth Contact Patterns;

---Inspection Implementation Specifications, Part 5: Evaluation of Gear Measuring Instruments;

---Inspection Implementation Specification Part 6: Bevel Gear Measurement.

This document replaces GB /Z 18620.1-2008 "Specifications for Inspection of Cylindrical Gears - Part 1: Inspection of Tooth Surfaces on the Same Side".

Compared with GB /Z 18620.1-2008, the main technical changes in the "Test" are as follows, except for structural adjustments and editorial modifications.

a) The description of the gear inspection range has been changed (see Chapter 4, Chapter 4 in the 2008 edition);

b) A description of the reference axis has been added (see 5.2);

c) Added content on measuring instruments and methods, equipment calibration, and test reports (see Chapter 6);

d) Recommended measurement procedures and practices have been added (see Chapter 7);

e) An inspection process for large gears has been added (see Chapter 8);

f) The description of tooth profile deviation measurement has been changed (see 9.1, Chapter 7 of the 2008 edition);

g) The description of helix deviation measurement has been changed (see 9.2, Chapter 8 of the 2008 edition);

h) The description of pitch deviation measurement has been changed (see 9.3, Chapter 6 of the 2008 edition);

i) A description of radial runout deviation measurement has been added (see 9.4);

j) An explanation of the deviation measurement results has been added (see Chapter 10);

k) The description of the integrated measurement has been changed (see Chapter 11, Chapter 9 in the 2008 edition);

l) Additional measurements have been added (see Chapter 12);

m) Added filtering and data density (see Chapter 13);

n) Additional calculations have been added (see Chapter 14).

This document is equivalent to ISO /T R10064-1.2019 "Inspection practice specifications - Part 1: Measurement of the tooth surface of cylindrical gears".

The type has been changed from ISO technical reports to my country's national standardization guidance technical documents.

Introduction

GB /Z 18620 (all parts) is a supporting document for GB/T 10095 (all parts), which defines the most... A new gear accuracy grade evaluation system has been established, and GB /Z 18620 (all parts) provides the corresponding gear accuracy measurement methods and precautions.

The GB /Z 18620 standard series is divided into several parts, which put forward specific specifications and requirements for different aspects of gear inspection.

GB /Z 18620 "Inspection Implementation Specification" is proposed to consist of the following six parts.

---Part 1: Measurement of Cylindrical Gear Tooth Surfaces. The purpose is to describe the inspection methods and requirements for the tooth surfaces on the same side of cylindrical gear teeth, in order to... Ensure that the quality and performance of the gears meet the prescribed technical standards.

---Part 2: Inspection of Radial Combined Deviation, Radial Runout, Tooth Thickness, and Backlash. The purpose is to describe the radial combined deviation of cylindrical gears.

Inspection methods for deviation, radial runout, tooth thickness, and backlash are crucial parameters for gear accuracy and performance.

---Part 3: Inspection of Gear Blank, Shaft Center Distance, and Axis Parallelism. The purpose is to describe the parallelism of the gear blank, shaft center distance, and axis.

The inspection method for the gear's runout is described, and recommended values are given to ensure that the quality and performance of the gear meet the predetermined technical requirements.

---Part 4: Inspection of Surface Structure and Tooth Contact Pattern. The purpose is to describe the surface structure and tooth contact pattern of cylindrical gears.

The methods for inspecting spots are important for evaluating the durability and performance stability of gears.

---Part 5: Evaluation of Gear Measuring Instruments. The purpose is to describe the principles and calibration of various gear measuring devices, as well as their uncertainties. The assessment.

---Part 6: Bevel Gear Measurement. The purpose is to describe a special method for measuring the precision of bevel gears.

GB /Z 18620 (all parts) provides detailed guidance and specifications for the design, manufacture, and inspection of gears, ensuring the quality of gear products. Quality and reliability.

1 Scope

This document provides supplementary content to GB/T 10095.1-2022. It provides methods for tooth surface measurement of individual involute cylindrical gears.

The implementation specifications (for measuring tooth pitch, tooth profile, helix, and tangential composite characteristics) explain the principle of the measuring device and provide specific guidelines for tooth... Suggestions on wheel measurement methods and result analysis, and attempts to interpret the measurement results.

This document applies only to the measurement of involute gears and does not include measurements using a dual-tooth-surface meshing measuring instrument (see ISO /T R10064-2).

2 Normative references

This document has no normative references.

3 Terms, definitions, symbols and abbreviations