JB/T 3047-1999 Tapping machine tool accuracy inspection

JB/T 3047-1999 This standard is a revision of JB 3047-82 "Precision of tapping combination 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 of tapping combination machine tools. This standard is applicable to tapping combination machine tools with ordinary accuracy. This standard was first issued in 1975 and revised for the first time in 1982. JB/T 3047-1999 Precision inspection of tapping combination machine tools JB/T3047-1999 standard download decompression password: www.bzxz.net

ICS25.060.99
Machinery Industry Standard of the People's Republic of China
JB/T3047—1999
Tapping Modular Machine Tools
Published on 1999-05-20
Precision Inspection
Implemented on 2000-01-01
National Bureau of Machinery Industry
JB/T3047—1999
This standard is revised on the basis of JB3047-82 "Precision of Tapping Modular Machine Tools". The technical content of this standard is consistent with that of JB3047-82, and it has only been re-edited according to relevant regulations. This standard replaces JB3047-82 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Modular Machine Tool Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard: Dalian Modular Machine Tool Research Institute. This standard was first issued in 1975 and revised for the first time in 1982. 1
1 Scope
Machinery Industry Standard of the People's Republic of China
Precision Inspection of Tapping Combination Machine Tools
The standard specifies the geometric accuracy requirements and inspection methods of tapping combination machine tools. This standard applies to tapping combination machine tools with ordinary grade precision. 2 Referenced Standards
JB/T3047-1999
Replaces JB304782
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: Geometrical Accuracy of Machine Tools under No-load or Finishing Conditions 3 General Requirements
3.1 When using this standard, the relevant provisions of GB/T17421.1 should be referred to. 3.2 The order of accuracy inspection items listed in this standard does not represent the actual inspection order. In order to reduce the loading and unloading of inspection tools and facilitate inspection, inspection can be carried out in any order.
3.3 The inspection tools and instruments specified in this standard are arbitration: in production, any other inspection tools and instruments can be used under the premise of ensuring inspection accuracy.
3.4 ​​Before the accuracy inspection, the installation level of the machine tool should be adjusted with a level. The longitudinal and transverse installation levels shall not exceed 0.04/1000. Only after passing the inspection can various accuracy inspections be carried out. 3.5 The two inspections of G2 and GB in this standard are only applicable to tapping combination machines with tapping multi-axis boxes installed on slides. 3.6 When there are more than two spindles on the tapping multi-spindle box, only two spindles can be selected for the corresponding accuracy inspection. 3.7 If there are special requirements, additional regulations can be proposed. Approved by the State Machinery Industry Bureau on May 20, 1999 and implemented on January 1, 2000
4 Geometric accuracy inspection
Inspection items
The coincidence of the axis line of the hole of the templatewww.bzxz.net
and the axis line of the hole of the sample
The parallelism of the axis line of the template
and the guide rail of the machine tool
Inspection tools
Test rod
Test rod
Horizontal bridge
Indicator
Test method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.4.2
Insert test rods with the same exposed diameter into the hole of the template body and the sample hole, and make the exposed length of the test rod in the sample hole ≤150mm, and the distance between the two ends of the test rod is 10mm. Put the 175mm long blade ruler against the upper busbar of the test rod according to the position and size shown in the figure. Use a feeler gauge to check the gap between the blade ruler and the test rod. Take the maximum gap as the measured value.
Then put the blade ruler against the side busbar 90° apart, perform the same test and calculate the measured value 5.4.1.2.4
Insert a test rod into the hole of the template body and place a horizontal bridge on the guide rail of the machine tool. Fix the indicator on the horizontal bridge and make its probe vertically press against the upper busbar at the position of the inspection rod a. Then move the slide 150mm.
The difference in the indicator readings before and after the slide moves is taken as the measured value.
Then move the indicator to the side busbar 90° apart, perform the same inspection and obtain the measured valueJB/T3047-
Inspection Items
Parallelism of the sample hole
axis to the machine
bed guide rail
Inspection Tools
Inspection Rod
Indicator
Inspection Method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.1.2.4
Insert a inspection rod into the hole of the master body and the hole of the sample. Fix the indicator on the inspection rod in the hole of the template, and make its probe vertically press against the upper generatrix of the inspection rod in the hole of the sample. Then move the slide 150mm.
The difference in readings before and after the indicator moves is taken as the measured value.
Then move the indicator to the side busbar 90° apart, perform the same test and find the measured value JB/T
3047-1999
Mechanical Industry Standard
Precision Test of Tapping Combination Machine Tools
JB/T3047—1999
Published and distributed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Format 880×12301/16 Printing Sheet 1/2 Number of Words 8000 First Printing in July 1999
First Edition in July 1999
Print Quantity 1-500
Price 500 Yuan
99-305
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