T/DLJX 0011.2-2023 The inspection conditions for the horizontal Y axis horizontal milling and turning composite machining center with moving columns Part 2: Accuracy of linear and rotational axis positioning and repeat positioning accuracy inspection

Scope

Scope: This document specifies the positioning accuracy and repeatability of linear and rotary axes for gantry-type horizontal Y-axis milling and turning composite machining centers, as well as the accuracy tolerances for these tests. This document applies to the positioning accuracy and repeatability tests for linear axes (with a travel range of up to 2000mm) and rotary axes (with a travel range of up to 360°). For linear axes exceeding 2000mm, the testing methods and accuracy tolerances specified in this section may also be used as a reference. This document does not address the environmental conditions, machine temperature rise, or testing methods already specified in GB/T17421.2-2000. Main technical content: This document is divided into six chapters, including scope, normative references, terms and definitions, general requirements, positioning accuracy of linear axes, and positioning accuracy of rotary axes. 1. **Scope**: This chapter specifies the scope of application of the standard. 2. **Normative References**: The documents referenced in this chapter are the latest valid versions. 3. **Terms and Definitions**: There are no terms or definitions requiring definition in this chapter. 4. **General Requirements**: Chapter 4, "General Requirements", specifies the standards for machine testing, the testing sequence, testing items, testing tools, diagrams, and the range of machine dimensions. 5. **Positioning Accuracy of Linear Axes**: Chapter 5, "Positioning Accuracy of Linear Axes", specifies the positioning accuracy tolerances for linear axes, testing tools, and related requirements. 6. **Positioning Accuracy of Rotary Axes**: Chapter 6, "Positioning Accuracy of Rotary Axes", specifies the positioning accuracy tolerances for rotary axes, testing tools, and related requirements.

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