JB/T 3550.2-1999 This standard is a revision of JB 3550-83 "Accuracy of mobile cylinder boring machines". During the revision, it was only renamed "Accuracy inspection of cylinder boring machines" according to the provisions of GB/T 15375-1994 "Method for compiling models of metal cutting machine tools", and the technical content has not changed. This standard is part of the JB/T 3550 "Cylinder boring machine" series of standards, which includes the following four parts: JB/T 3550.1-1999 Cylinder boring machine parameters JB/T 3550.2-1999 Cylinder boring machine accuracy inspection JB/T 3550.3-1999 Cylinder boring machine technical conditions JB/T 3550.4-1999 Cylinder boring machine spindle end This standard specifies the requirements and inspection methods for the geometric accuracy inspection and working accuracy inspection of cylinder boring machines. This standard applies to newly designed cylinder boring machines. This standard was first issued in December 1983. JB/T 3550.2-1999 Cylinder boring machine accuracy inspection JB/T3550.2-1999 Standard download decompression password: www.bzxz.net

ICS25.080.20
Machinery Industry Standard of the People's Republic of China
JB/T3550.2—1999
Cylinder Boring Machine
1999-05-20 Issued
Precision Inspection
2000-01-01 Implementation
State Machinery Industry Bureau
JB/T3550.2—1999Www.bzxZ.net
This standard is a revision of JB355083 "Mobile Cylinder Boring Machine" The revision of the "Precision of Cylinder Boring Machine" was only edited according to relevant regulations. According to the provisions of GB/T15375-1994 "Method for Compiling Models of Metal Cutting Machine Tools", the standard name was changed to "Precision Inspection of Cylinder Boring Machines"; according to the provisions of GB/T1182-1996 "General Rules, Definitions, Symbols and Drawings for Shape and Position Tolerances", the tolerances of roundness and cylindricity were changed from diameter values ​​to radius values, and the tolerance value of cylindricity was changed to 0.0075mm. Other technical contents have not changed. This standard is part of the JB/T3550 "Cylinder boring machine" series of standards, which includes the following four parts: JB/T 3550.1—1999
JB/T3550.2—1999
JB/T3550.3—1999
JB/T3550.41999
Cylinder boring machine parameters
Cylinder boring machine accuracy inspection
Cylinder boring machine
Technical conditions
Cylinder boring machine
Spindle end
This standard replaces JB355083 from the date of implementation. This standard is proposed by the National Technical Committee for Metal Cutting Machine Tools Standardization. This standard is under the jurisdiction of the Boring and Drilling Machine Branch of the National Technical Committee for Metal Cutting Machine Tools Standardization. The responsible drafting units of this standard are Xi'an Special Machine Tool Factory and Shanghai Aviation Equipment Factory. This standard was first issued in December 1983. 1
1 Scope
Mechanical Industry Standard of the People's Republic of China
Precision Inspection of Cylinder Boring Machines
JB/T3550.2-1999
Replaces JB355083
This standard specifies the requirements and inspection methods for geometric accuracy inspection and working accuracy inspection of cylinder boring machines. This standard is applicable to cylinder boring machines.
Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T17421.1-1998 General Rules for Machine Tool Inspection Part 1: Geometric Accuracy of Machine Tools under No-load or Finishing Conditions 3 General Requirements
3.1 When using this standard, reference should be made to the relevant provisions of GB/T17421.1. In particular, the installation before inspection, the idling temperature rise of the spindle and other components, the inspection methods and the accuracy of the inspection tools. 3.2 The order of accuracy items listed in this standard is the actual inspection order. 3.3 When the measured length is different from the length specified in this standard, the tolerance should be converted according to the measurable length according to the provisions of 2.3.11 in GB/T17421.1-1998. When the conversion result is less than 0.005mm, it is still calculated as 0.005mm. 3.4 Inspection items can be increased or decreased according to the agreement between the user and the manufacturer. Approved by the State Bureau of Machinery Industry on May 20, 1999, and implemented on January 1, 2000
4 Geometric accuracy inspection
Inspection items
Verticality of the plane at the bottom of the moving spindle sleeve:
a. In the longitudinal plane
b. In the transverse plane
Inspection tools
Parallel shims
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.5.2.2
After the machine tool is raised with parallel shims, it is fixed on the inspection platform.
Put the angle ruler on the inspection platform: a. In the longitudinal plane; b. In the transverse plane. Fix the indicator on the end of the spindle so that its probe touches the inspection surface of the angle ruler. Move the spindle sleeve and inspect it over the full stroke. Calculate the errors of a and b respectively. The maximum difference in the indicator reading is the verticality error
JB/T3550.2-1
Inspection items
Radial runout of the outer circle of the spindle end
Positioning of the spindle axis to the axis of the standard
cylinder bore
Inspection tools
Parallel pads
Indicator
Standard cylinder
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.6.12
The spindle sleeve is located in the middle of its stroke. Fix the indicator so that its probe touches the outer circle surface near the spindle end vertically. Rotate the spindle for inspection. The maximum difference in the indicator reading is the radial displacement error. The spindle sleeve extends into the standard cylinder (or special measuring tool) (or the special measuring tool at about half of the stroke, select the one that matches the hole size). The indicator is fixed on the spindle end face so that its probe touches the inner surface of the standard cylinder (or special measuring tool) vertically, and the spindle is rotated slowly for inspection. The maximum difference of the indicator reading is the positioning accuracy error
JB/T3550.2-
5 Working accuracy inspection
Test piece size:
d, I as per design requirements, Ud>2
Test piece material:
Gray cast iron or alloy cast iron, ductile iron, high phosphorus cast iron and other high-grade cast iron
Inspection properties
Accessories (machine
body clamping device)
Handle the machine The bed is fixed on the test piece. Cutting conditions: tool material and geometric angle and cutting amount are as designed. Inspection items (roundness deviation is the difference between the maximum radius and the minimum radius on the same horizontal plane): b. Cylindricity (cylindricity deviation is the difference between the maximum radius and the minimum radius on the same longitudinal section). Indicator t||Refer to the relevant provisions of GB/T17421.1-1998
|tt||Roundness and cylindricity should be tested at any position of the test piece
, and the maximum error value measured shall be used as the measurement
JB/T3550.2-
Republic of China
Machinery Industry Standard
Cylinder Bed Accuracy Inspection
JB/T3550.2-—1999
Ministry of Machinery Industry Published and distributed by the Machinery Standardization Research Institute Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2, Shouti South Road, Beijing, zip code 100044)*
Format 880×1230
X number of characters xXX,XXX
Print sheets X/X
Xth printing in XX month, 19XX
Xth edition in XX month, 19XX
Number of copies 1-XXX
Price XXXXX yuan
XX-XXX
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