1 Scope
This standard specifies the requirements on the technology, assembling, safety, testing methods, inspection rules and other requirements of metal cutting machines' hydraulic system.
This standard is applicable to hydraulic transmission and control system for metal cutting machine tools, the working medium of which is hydraulic oil.
2 Normative References
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 786.1 Fluid drive system and element graphic mark and contour map. Part 1: graphic mark used for routine application and date processing
GB/T 3766 Hydraulic system general specifications for metal cutting machine tools (GB/T 3766-2001, eqv ISO 4413:1998)
GB/T 7632 Recommendations for the Choice of Lubricants for Machine Tools(GB/T 7632-1987; neq BS 5063:1982)
GB/T 7935 Hydraulic elements and general specifications
GB/T 14039 Pollution grade number of hydraulic transmission, oil, and solid particulate (GB/T14039-2002; ISO 4406: 1999, MOD)
GB/T 16769 Measurements of noise pressure level of metal cutting machine tools.
GB/T 17489 Analysis on hydraulic particulate pollution. Extract the solution sample from work system pipeline (GB/T 17489-1998, idt ISO 4021:1992)
JB/T 7938 Oil tank nominal capacity series of hydraulic power unit
JB/T 8356.1 Machine tool package and technical conditions
3 Technical requirements
3.1 Basic Requirements
The design, manufacture and manipulating of hydraulic system shall be in accordance with the requirements specified in GB/T 3766, and ensure long life permanence of equipment depositing, as well as convenience of maintenance.
3.2 Hydraulic Elements and Components.
The hydraulic elements used in hydraulic system shall be accordance with the requirements specified in GB/T7935; other components shall be in accordance with the requirements of corresponding standards.
3.3 Hydraulic Oil
3.3.1 The hydraulic oil used in hydraulic system shall be in accordance with the requirements specified in GB/T 3766 and GB/T 7632. Oil filtration device shall be set in the position where replacing and maintaining is convenient in hydraulic system. The oil shall be filtered fully before injected into the oil tank of hydraulic system.
3.3.2 Hydraulic system oil and oil used in guide track or other mechanical parts should be mutually separated.
