JB/T 8772.1-1998
Test conditions of precision machining centres.Part 1:Geometric tests for machines with horizontal spindle and with accessory heads (horizontal Z axis) (English Version)
- Standard No.
- JB/T 8772.1-1998
- Language
- Chinese, Available in English version
- Release Date
- 1998
- Published By
- Professional Standard - Machinery
- Status
- 2010-02
- Latest
- JB/T 8772.1-1998
- Scope
- This standard specifies the geometric accuracy requirements and inspection methods of precision horizontal machining centers (i.e., horizontal Z-axis). This standard applies to precision horizontal machining centers with essentially four CNC axes, namely: three linear coordinates (X, Y, Z), strokes up to 2000 mm and a rotary axis (B′) related to the table. The appendix of this standard lists three possible inspection items for additional universal spindle heads: Appendix A: 45° bi-divided indexing spindle head with mechanical indexing of two objects (e.g. Hisco coupling) at different angular positions : The corresponding inspection (AG1 to AG9) only checks the final position of the spindle; Appendix B: Rotary spindle head, with two mutually perpendicular CNC rotation axes (inspection BG1 to BG7); Appendix C: 45° bisection continuous indexing Spindle head, similar to the first version, but with continuous indexing of two CNC rotary axes: the corresponding inspections (CG1 to CG7) check all geometric properties (planes and axes) that affect the final position of the spindle, both rotary The exception is the positioning accuracy of the axes; these tests may also be used for further testing of 45° indexing spindle heads, as long as their movement and locking allow this.
JB/T 8772.1-1998 history
- 1998 JB/T 8772.1-1998 Test conditions of precision machining centres.Part 1:Geometric tests for machines with horizontal spindle and with accessory heads (horizontal Z axis)
