JB/T 9899-1999 This standard is a revision of JB 4242.3-86 "Accuracy of Universal Radial Drilling Machines on Bases". During the revision, only editorial changes were made according to relevant regulations, and the technical content was not changed. The standards that match this standard are: GB/T 2815-1989 Drilling Machine Spindle End JB/T 6335.1-1999 Radial Drilling Machine Series JB/T 6336-1992 Technical Conditions for Universal Radial Drilling Machines This standard specifies the requirements and inspection methods for geometric accuracy inspection and working accuracy inspection of mobile universal radial drilling machines. This standard is applicable to mobile universal radial drilling machines with a maximum drilling diameter of 25~80mm. This standard was first issued in July 1986. JB/T 9899-1999 Mobile Universal Radial Drilling Machine Accuracy Inspection JB/T9899-1999 Standard Download Decompression Password: www.bzxz.net

1CS25.080.40
Machinery Industry Standard of the People's Republic of China
JT9899-1999
Precision Inspection of Mobile Universal Radial Drilling Machines
Published on 1999-05-20
National Bureau of Machinery Industry
Implementation on 2000-01-01
JB/I9899-1999
This standard is a revision of JB4242.3-86 "Precision of Universal Radial Drilling Machine Base", and the relevant regulations have been revised, and the technical content has been changed.
The supporting standards of this standard are:
GB/T2B1S1989 Drilling machine spindle end
JBT633S.11999 Drilling machine series spectrum JB/T6336992
Technical conditions for radial drilling
Appendix A of this standard is the appendix of the standard. bZxz.net
This standard replaces the old 4242.3-86 from the date of implementation. This standard was proposed by the National Metal Cutting Machine Tool Standardization Technical Committee. This standard was issued by the National Metal Cutting Machine Tool Standardization Technical Committee Drilling Machine Branch. The responsible unit of this standard: Zhongjie Youshi Guang, Beijing Third Machine Tool Factory. This standard was first issued in July 1986.
1 Scope
Machinery Industry Standard of the People's Republic of China
Precision Inspection of Moving Direction Radial Drilling Machines
JB/T9899-1999
Replacement J42423-86
This standard specifies the requirements and inspection methods for the geometric accuracy inspection and working accuracy inspection of mobile radial drilling machines. This standard applies to mobile radial drilling machines with a maximum drilling diameter of 25 mm. 2 Reference Standards
The provisions contained in the following standards constitute the provisions of this standard by citing them in this standard. When this standard was published, the versions shown were all valid. The relevant standard department will encourage revisions, and parties using this standard will explore the possibility of using the latest versions of the following standards. CB/T17421.1—1998 General Rules for Hangar Inspection Part 1: Geometric Accuracy of Machine Tools under No-load or Operating Conditions 3.1 When using this standard, the relevant provisions of GB17421.1 shall be taken into consideration, especially when inspecting the idling temperature rise of the front case shaft and other components. Inspection Methods 3.2 The specific inspection items listed in the standard do not indicate the actual number of inspection items. In order to coordinate the inspection process and inspection efforts, the inspection may be carried out according to the order specified by the manufacturer. 3.3 When the actual measured length is different from the length specified in this standard, the tolerance shall be converted according to the length that can be measured according to the provisions of GB17421.1-19982.3.1. When the conversion result is less than 0.001mm, it shall still be calculated as 0.1mm. 3, 4 The longitudinal plane referred to in this standard is the true plane passing through the main axis (when the main axis is in a vertical state) and the vertical axis; the transverse plane is the vertical plane passing through the main axis (when the axis is in a vertical state) and perpendicular to the longitudinal plane. 3.5 If no special provisions are made for the positions of machine tool components in the "Test Method" column in Section 5 of this standard, the provisions shall be made so that the spindle is in the zero position: the through-bone and the sleeve shall be respectively in the intermediate position and the intermediate position. 3.6 Based on the agreement between the user and the manufacturer, the test items may be increased or decreased. Approved by the State Regulations on Machinery Industry on 1999-05-20, implemented on 2000-1-01
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Appendix A
(Standard Appendix)
Corresponding relationship between F value and drill diameter
The corresponding relationship between the applied minimum F value and the true diameter of the drill hole is shown in Table 1AI
Maximum drill hole diameter
Axial F
1 This shows the flow of the drill bit on medium-strength steel with tensile strength of -ShINm. 2 Drill diameter, or for steel, is the maximum diameter specified in the machine tool manual.
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