JB/T 9006.3-1999 JB/T 9006.3-1999 Technical conditions for cast drums for cranes JB/T9006.3-1999 Standard download decompression password: www.bzxz.net

JB/T 9006.3--1999
This standard is a revision of ZBJ80007.3-87 "Technical conditions for cast drums for cranes". During the revision, only editorial changes were made to the original standard, and the main technical content remained unchanged. This standard is part of the JB/T9006 "Cast drums for cranes" series of standards, which includes the following three parts: JB/T9006.1-1999 Cast drums for cranes JB/T 9006. 2-—1999
JB/T 9006.3---1999
Cast drums for cranes
Cast drums for cranes
This standard replaces ZBJ80007.3-87 from the date of implementation. Diameter and groove
Type and size
Technical conditions
This standard is proposed and managed by the National Technical Committee for Standardization of Hoisting Machinery. The responsible drafting unit of this standard: Dalian Daqi Group Co., Ltd. The main drafters of this standard: Zhou Yu'an and Cui Zhenyuan. 467
1 Scopebzxz.net
Machinery Industry Standard of the People's Republic of China
Casting drums for cranes
Technical conditions
Casting drums for cranes technical requirementsJB/T 9006.3 --1999
Replaces ZB J80 007.3-87
This standard applies to type A to type D steel wire rope casting drums (hereinafter referred to as drums) specified in JB/T9006.2-1999 "Types and dimensions of casting drums for cranes"
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. The versions shown are valid when this standard is published. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. Surface roughness parameters and their values
GB/T 1031--- 1995
GB/T 1184—-1996
Form and position tolerances without tolerance values
GB/T 1801--1979
Tolerances and fits
GB/T 1802-—1979
GB/T 1804-1992
GB/T 3323--1987
GB/T 9439-1988
Tolerances and fits
—General tolerances
Tolerance zones and fits of holes and shafts up to 500 mmUnspecified tolerances for linear dimensions of common holes and shafts with tolerance zones greater than 500 to 3150 mm
Radiography and quality grading of steel fusion-welded butt jointsGrey iron castings
Carbon steel castings for general engineering purposes
GB/T 11352--1989
GB/T 13384—1992
3 Technical requirements
3.1 Materials
General technical conditions for packaging of electromechanical products
The material for casting the coil should be not less than HT200 grey cast iron specified in GB/T9439, or ZG270-500 cast steel specified in GB3/T11352. Iron castings need to be aged to eliminate internal stress, and steel castings should be annealed. 3.2 Surface quality
The rolls shall not have cracks. The surface of the finished rolls shall not have significant defects that affect the performance and damage the appearance (such as pores, looseness, slag, etc.).
3.3 Dimension tolerance and surface roughness
The difference in the bottom diameter of the left and right spiral grooves on the same roll (i.e. the roll diameter D) shall not exceed h12 specified in GB/T1801 and GB/T1802. The tolerance grade of the unnoted tolerance size of the machined surface shall be m grade (medium grade) in GB/T1804. The unnoted machining surface roughness Ru value shall be 12.5um in GB/T1031. Approved by the State Bureau of Machinery Industry on June 28, 1999 468
Implemented on January 1, 2000
3.4 ​​Geometric Tolerances
JB/T9006.3—1999
The roundness t, coaxiality t, radial runout t of the left and right spiral grooves on the drum and the end face runout t shall not be greater than the following values ​​in GB/T1184:
D, the tolerance zone of the hole
dt2 shall not be less than Grade 8;
t, shall not be less than Grade 8.
3.5 Screw Holes for Pressing Plates
The screw holes for the wire rope pressing plates must be complete and the threads shall not have defects such as broken or fractured. 3.6 Welds
For cast steel coils that must be welded, the important welds shall not have defects such as cracks and lack of fusion. The quality of its weld seam shall meet the requirements of Grade II quality in GB/T3323.
3.7 Others
The processed parts of the coils shall be coated with anti-corrosion anti-rust oil; the unprocessed parts shall be coated with anti-rust paint. 4 Inspection rules
The coils shall be inspected by the technical inspection department of the manufacturer, and the dimensions, technical requirements and markings of each coil shall be inspected. The manufacturer shall ensure that each coil shipped out of the factory meets the requirements of this standard. 5 Marking, packaging, transportation and storage
5.1 Marking
Each coil shall have a permanent and clear mark of specifications and the trademark of the manufacturing unit, and the mark shall be located at the position of the coil. 5.2
The packaging of the coil shall ensure that it is not damaged and corroded, and shall comply with the provisions of GB/T13384. 5.3 Transportation
During transportation, the coils shall be strictly prohibited from being bumped to ensure that the coils are not damaged. 5.4 Storage
The rolls should be stored in a dry and ventilated place and should not come into contact with acidic, alkaline or other corrosive substances to prevent rust.
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