JB/T 51216-1997 Quality classification of rotary tillage machine machete products JB/T51216-1997 standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T51216—1997
Rotary Tilling Machine Scimitar
Product Quality Classification
(Internal Use)
Published on August 12, 1997
Ministry of Machinery Industry of the People's Republic of China
Implemented on January 1, 1998
JB/T51216-1997
This standard is a revision of JB/T51216.1~51216.394 "Quality Index, Test Methods, Inspection Rules for Rotary Tilling Machine Product Quality Classification" based on GB/T56691995 "Rotary Tilling Machine Knife and Knife Holder". When this standard was revised, the following changes were made to JB/T51216.151216.3—94: 1 Standard name: "Rotary Tilling Machine" was changed to "Rotary Tilling Machine..." 2. Standard structure: changed from three independent standards to one standard. 3. Standard content: added stubble knives and blade-type rotary tillage knives; added 3.2 in the quality indicators, added 5.2.4 in the inspection rules; decomposed the handle size indicator into three indicators to emphasize the interchangeability of products. Removed the edge curve deviation indicator and changed it to edge line quality. Hardness indicators are not divided into qualified products and first-class products. Adjusted the classification of unqualified products in the inspection rules, the single-knife power consumption indicator was changed from Class A to Class B, and the handle width and handle fixing hole symmetry were changed to Class A. From the date of entry into force, this standard will replace JB/T51216.1~51216.3-94. This standard is proposed and managed by the National Agricultural Machinery Standardization Technical Committee. The responsible drafting unit of this standard: Nanjing Agricultural Mechanization Research Institute of the Ministry of Agriculture. Participating drafting units of this standard: Jiangsu Feidaer Group (formerly Jiangsu Jianhu County Agricultural Machinery Parts Factory), Beijing Xinfeng Machinery Manufacturing Plant. The main drafters of this standard are Zhu Jiping, Liang Quanfang, Ge Wanyun and Zhang Yujiang. This standard was first issued and implemented in 1987, revised for the first time in 1990, changed the standard number in 1994, and revised for the second time in 1997. 1 Scope
Machinery Industry Standard of the People's Republic of China
Product Quality Grading
Rotary Tillage Machine Scimitar
(Internal Use)
JB/T512161997
Replaces JBT51216.94
JB/T51216.2—94
JB/T51216.3—94
This standard specifies the quality grade indicators, test methods and inspection rules for rotary tillage machine scimitars (hereinafter referred to as scimitars). This standard applies to the quality grading of scimitars (including disc-type rotary tillage knives and stubble knives) products. Cited standards
The clauses contained in the following standards constitute the clauses 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. GB224—87
GB/T23091
GB2828-—87
GB/T5669—1995
3 Quality indicators
Method for determining the depth of decarburization layer of steel
Metal Rockwell hardness test method
Batch inspection counting sampling procedure and sampling table (applicable to continuous batch inspection) Rotary tillage machine knives and knife seats
Curved knives should be manufactured according to drawings and technical documents approved by prescribed procedures and comply with the provisions of GB/T5669. The surface of curved knives shall not have defects such as cracks that affect use. The quality of curved knives is divided into qualified products and first-class products according to their technical level and quality level. The quality index of the machete product shall comply with the provisions of Table 1 and Table 2. Table 1 Quality index of knife holder type machete
Hardness of handle
Hardness of blade
Metallographic structure
Thickness of single-side decarburization layer
Deviation of machete turning radius
Deviation of working width
Thickness of handle
Approved by the Ministry of Machinery Industry on August 12, 1997
R≥195
Quality classification index
Qualified products
38~45HRC
4854HRC
Tempered martensite
Tempered martensite
10±05
Implementation of 1998-01-01
Symmetry of handle width and handle fixing hole
Diameter of handle fixing hole
Deviation of bending angle of tangent surface
Cutting edge width
Cutting edge thickness
Cutting edge line quality
Rust prevention measures
Single-knife power consumption
The sample knife should comply with the provisions of GBT5669.
JB/T51216-1997
Table 1 (end)
Quality grading index
Qualified products
Conform to the provisions of GBT56
Conform to the provisions of Table 1 of GB/T5669-1995
The cutting edge line should be smooth
Rust-proof treatment
≤Power consumption of sample knife
2 Quality index of knife disc type curved knife
Hardness of handle
Hardness of blade
Metallographic structure
Thickness of single-sided decarburized layer
Curve blade turning radius deviation
Working width deviation
Handle thickness deviation
Handle fixing hole diameter
Handle fixing hole center distance deviation
Tangent bending angle deviation
Cutting edge width deviation
Cutting edge thickness
Cutting edge line quality
Rust prevention measures
Test method
See Table 3 for the quality inspection method of curved knife products.
≤95% of sample knife power consumption
Quality grading index
Qualified products
38~45HRC
48~54HRC
Tempered martensite
Tempered martensite
Meet the requirements of Table 2 and Table 3 of GB/T561995
The cutting edge line should be smooth
Rust-proof treatment is carried out
The power consumption of a single knife is carried out on a power consumption test bench, and the tested curved knife and the comparison sample knife are measured under the same conditions. The test conditions are: soil 4.2
absolute moisture content ≤24%, soil firmness ≥0.4MPa, soil trough forward speed 0.2~0.5m/s, knife roller speed 160~250r/min, tillage depth 8~14m.
5 Inspection rules
5.1 Sampling method
Hardness of handle
Hardness of blade
Metallographic structure
Thickness of single-sided decarburized layer
Deviation of curved blade turning radius
Deviation of working width
Handle thickness and handle thickness deviation
JB/T51216-1997
Symmetry of handle width and handle fixing hole
Diameter of handle fixing hole
Deviation of center distance of handle fixing hole
Deviation of bending angle of tangent plane
Cutting edge width and cutting edge width deviation
Cutting edge thickness
Cutting edge line quality
Rust prevention measures
5.1.1 Sampling method according to Testing method as specified in GB2828
Measure according to GB/T230
Measure according to GB/T230
Measure by metallographic test method
Measure according to GB224
Measure with integrated fixture and vernier caliper
Measure with integrated fixture and height vernier caliperMeasure with special gauge or vernier caliper
Measure with special gauge, and both items are qualifiedMeasure with special gauge or vernier caliper
Measure with vernier caliper
Measure with integrated fixture and universal angle rulerMeasure with vernier caliper
Measure with vernier caliper
5.1.2 Randomly select products produced by the enterprise in the past six months. When sampling in the factory, the product inventory: the knife seat type curved knife should be no less than 1000 pieces; the knife disc type curved knife should be no less than 300 pieces. Sampling in the user or distribution department is not subject to this limit. 5.1.3 Sample size: 13 knife seat type curved knives, 8 knife disc type curved knives 5.1.4 The number of single knife power consumption, metallographic structure and single-side decarburized layer thickness assessment is 2 pieces (1 left and 1 right curved knife) 5.2Www.bzxZ.net
Evaluation rules
5.2.1 According to the impact of the inspected item on the product, determine its unqualified classification, see Table 4 and Table 5. 5.2.2
See Table 6 and Table 7 for sampling judgment. AQL is the qualified quality level, Ac is the qualified judgment number, and Re is the unqualified judgment number. The product quality level is determined by item-by-item assessment and category-by-category judgment. If there are cracks on the surface of the inspected scimitar or other defects that affect the use, all indicators of the scimitar are judged to be unqualified. 3
Unqualified classification
Unqualified classification
JB/T51216-1997
Table 4 Blade holder type scimitar
Table 5 Blade disc type scimitar
Handle hardness
Blade hardness
Handle width and shank fixing hole symmetry
Single-blade power consumption
Metallographic structure
Single-side debonding Carbon layer thickness
Curve blade turning radius deviation
Working width deviation
Handle thickness
Handle fixing hole diameter
Tangent bending angle deviation
Cutting edge thickness
Cutting edge width
Cutting edge line quality
Rust prevention measures
Handle hardness
Blade body hardness
Handle fixing hole center Center distance deviation
Metallographic structure
Thickness of single-side decarburized layer
Curve blade turning radius deviation
Working range deviation
Handle thickness deviation
Handle fixing hole diameter
Tangent bending angle deviation
Cutting edge thickness
Cutting edge width deviation
Cutting edge line quality
Rust prevention measures||tt| |Sampling plan
Qualified products
First-class products
Number of items
Inspection level
Sample code
Sample size
JB/T51216-1997
Blade-type curved knife
Note: When the sample size changes,
AQL remains unchanged, and Ac and Re are selected according to Table 3 of GB2828-87. Table 7
Number of items
Sampling plan
Qualified products
First-class products
Inspection level
Sample code
Sample size
Blade-type curved knife
Note: When the sample size changes,
AQL remains unchanged, and Ac and Re are selected according to Table 3 of GB2828-87. B
Mechanical Industry Standard
Rotary Tilling Machine Scimitar, Product Quality Classification
(Internal Use)
JB/T51216-1997
Published and Distributed 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 880X12301/16 Printing Sheet 1/2
Word Count 12000
First Edition in August 1997
First Printing in August 1997
Print Quantity 1-500 Pricing 10.00 Yuan
97-187
Mechanical Industry Standard Service Network: http:/kwwwJB.ac.cn69
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