JB/T 54904-1999 Shell-type end mill product quality classification JB/T54904-1999 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T54904-1999
Shell-type end mills
Product quality classification
(Internal use)
Published on 1999-12-30
National Bureau of Machinery Industry
Implemented on 2000-06-01
JB/T54904—1999
This standard is a revision of JBT54904-93 "Shell-type end mills product quality classification". Since its product standard has been revised, this standard has revised the corresponding clauses of JB/T54904—93. This standard replaces JB/T54904—93 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Tool Standardization. The responsible drafting unit of this standard: Chengdu Tool Research Institute. 1 Scope
Machinery Industry Standard of the People's Republic of China
Shell End Mills
Product Quality Grading
(Internal Use)
JB/T54904—1999
Replaces JB/T5490493
This standard specifies the AQL value of the shell end mills when the quality grade is evaluated according to JB/T54854, the RQL value of the periodic stability assessment, the classification of non-conformities and the life test. This standard is applicable to the quality grade assessment and periodic stability assessment of the shell end mills produced in batches according to GB/T1114.1~1114.2. 2 Referenced 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 are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1114.1—1998
GB/T1114.2—1998
GB/T61321993
JB/T54854—1999
3Specified values ​​of AQL
Specified values ​​of AQL are in accordance with Table 1.
Product grade
Qualified products
Superior products
4Specified values ​​of RQL
Specified values ​​of RQL are in accordance with Table 2.
Product grade
Qualified product
Superior product
Shell end mills Part 1: Types and dimensionsShell end mills Part 2: Technical requirements
Interchangeable dimensions of milling cutters and milling cutter shanks
General rules for tool product quality classification
Approved by the State Machinery Industry Bureau on December 30, 1999 Class
Class C unqualified
Class C unqualified
Class C unqualified|| tt||2000-06-01 implementation
5 Classification and grouping of non-conformities
Classification and grouping of non-conformities shall be in accordance with Table 3
JB/T54904—1999
Non-conformities
1) There are cracks, chipping, burns, blunt cutting edges and other non-conformities that affect the performance:
2) The surface roughness of the front and rear surfaces of the cutter teeth, the inner hole surface and the two supporting end surfaces does not meet the Class B non-conformity||tt| |Class B failure
Class B failure
Class C failure
6 Life test
Test conditions
Comply with standard requirements:
3) The radial runout of the circumferential blade to the inner hole axis exceeds the tolerance; 4) The inner hole diameter exceeds the tolerance;
5) The material does not meet the standard requirements:
's marking and packaging do not meet the standard requirements
1) The end face runout of the end blade to the inner hole axis exceeds the tolerance 1) The hardness of the working part does not meet the standard requirements: 1) Total length exceeds tolerance: wwW.bzxz.Net
2) Working part outer diameter exceeds tolerance:
3) Working part diameter exceeds tolerance:
4) Keyway depth and width exceed tolerance:
5) There are the following minor visual failures: Slight bruises and slight rust on the cutting edge, a small amount of black spots and rust on other surfaces, and yellow oxide film caused by grinding. 6.1.1
Machine tool: Milling machine that meets the precision requirements.
6.1.2 Tool: Sample size n=3-5 pieces. 6.1.3 Test damage: The material is 40Cr steel, quenched and tempered, with a hardness of 200~220HB. Cutting specification: as specified in Table 5 and Figure 1.
Judgment basis
According to GB/T1114.2
According to GB/T1114.2
According to GB/T1114.1
According to GB/T1114.2
According to GB/T1114.2
According to GB/T1114.2
According to GB/T1114.2
According to GB/T1114.1
According to GB/T1114.1
According to GB/T1114.2
According to GB/T6132
Cutting fluid: Use 5% emulsified oil-water solution for sufficient cooling, and its flow rate should be not less than 5L/min. 6.1.5
Milling method: reverse milling.
6.17 Tool clamping: Use milling cutter shank for clamping, the maximum radial runout of the cutting part 8≤0.08mm, the maximum end face runout S2≤0.05mm.
6.2 Test result evaluation
6.2.1 Life criterion:
a) The wear value of the back reaches the requirements of Table 4:
JB/T54904—1999
or other phenomena that cannot cut normally.
b) Chipping occurs: CH=0.8mm,
2 Life index is in accordance with Table 5.
Outer diameter of milling cutter
Outer diameter of milling cutter D
>80~125
Cutting speed
Feed rate
mm/min
Average wear value VB
Back cutting amount ap
Milling width ar
Average life T
Maximum wear value VB
Coefficient of variation
Average life T
Coefficient of variation
Mechanical industry standard
Product quality classification of shell end mills
(for internal use)
JB /T54904-1999
Published by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing, Postal Code: 100044)*
Format: 880×12301/16 Printing Sheet: 1/2 Word Count: 8000First Edition: May 2000
First Printing: May 2000
Print Quantity: 1-500
Price: RMB 1,000
Serial Number: 99-1769
Mechanical Industry Standards Service Network: http:/hvwwJB.ac.cn66106
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