JB/T 9884-1999 This standard is a revision of ZB J58 003-87 "Precision of precision boring heads for modular machine tools". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard specifies the geometric accuracy requirements and inspection methods for precision boring heads for modular machine tools. This standard is applicable to precision boring heads for modular machine tools and their automatic lines. This standard was first issued in 1987. JB/T 9884-1999 Precision inspection of precision boring heads for modular machine tools JB/T9884-1999 Standard download decompression password: www.bzxz.net

[C5 25, 060. 99
Machinery Industry Standard of the People's Republic of China
B/T9884-1999
Modular Machine Tools
Precision Boring Heads
Precision Inspection
1999-05-20 Issued
National Bureau of Machinery Industry
Implementation on 2000-01-01
JB/T9884—1999
This standard is revised on the basis of 2B158003—87≤Precision of Boring Heads for Modular Machine Tools". The technical content of this standard is consistent with 2B158003—87. It has been re-edited in accordance with relevant regulations. From the date of implementation of this standard, it will replace ZBJ58003—87. This standard was proposed by the National Metal Cutting Machine Tool Standardization Technical Committee. This standard is under the jurisdiction of the Combined Machine Tool Branch of the National Standardization Technical Committee for Cutting and Scratching Machine Tools. The responsible drafting unit of this standard is Dalian Combined Machine Tool Research Institute. This standard was first revised and issued in 1987.
1 Scope
Machinery Industry Standard of the People's Republic of China
Combined Machine Tools
Precision Boring Head Accuracy Inspection
This standard specifies the geometric accuracy requirements and inspection methods for precision boring heads of combined machine tools. This standard is applicable to precision boring heads of combined machine tools and their automatic lines. 2 Referenced Standards
JB/T9884—1999
Replaces 7.BJ5800387
The provisions contained in the following standards are regarded as the provisions of the combined standard by reference in this standard. At the time of publication of this standard, the versions shown are valid. All specifications are subject to revision. Parties using non-standard standards should explore the possibility of using the latest version of the listed standards. GB/T17421.11998 General Rules for Machine Tool Inspection Part 1: Geometrical Accuracy of Machine Tools under No-Load or Finishing Conditions 3.1 The nominal size of the precision head is expressed in degrees of relative slippage, which is equal to the bottom width of the machine head. 3.2 When using this standard, the relevant provisions of GB/T17421.1 should be followed. 3.3 The inspection tools and instruments specified in this standard are arbitrary. In production, other inspection tools and instruments can be used under the premise of ensuring the accuracy of the inspection. 4. Geometrical Accuracy Inspection 4.1 Place the precision head on a flat plate and conduct the following inspections. 4.2 The various accuracies of the static precision head should be inspected with the spindle raised. State Machinery Industry Bureau 1999-05-20 approved 208-0-01-01 implementation
J/T9994-1999
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