This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, packaging and marking requirements of grass picker tines. This standard applies to grass picker tines. JB/T 6943-1993 Grass picker tines JB/T6943-1993 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T6943-93
Grass Picker Spring Teeth
Published on July 29, 1993
Ministry of Machinery Industry of the People's Republic of China
Implemented on January 1, 1994
Machinery Industry Standard of the People's Republic of China
Grass Picker Spring Teeth
Subject Content and Scope of Application
JB/T694393
This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules and packaging and marking requirements of grass picker spring teeth (hereinafter referred to as spring teeth).
This standard applies to grass picker spring teeth. 2
Reference standards
Technical conditions for cold-rolled cylindrical helical torsion springs GB1239.3
GB1805
GB2828
GB4360
3.1 Spring tooth arm
Spring terminology
Batch inspection counting sampling procedure and sampling table (applicable to continuous batch inspection) Oil quenching-tempered carbon spring steel wire
The part of the spring tooth that contacts the grass during operation is called the spring tooth arm, 3.2 Broken teeth
Any part of the spring tooth that breaks is called a broken tooth. 3.3 The terms related to springs shall comply with the provisions of GB1805. Type and basic parameters
4.1 The spring tooth type is shown in the figure below.
The end of the spring tooth arm can be bent at an angle in the direction of picking up and lifting, and its size is determined by the manufacturer within the specified range. Approved by the Ministry of Machinery Industry on July 29, 1993
Implemented on January 1, 1994
4.2 The basic parameters of the spring teeth shall comply with the requirements of Table 1. Item
Tine hip spacing
Free angle of spring arm
Outer diameter of spring
Tine length
Spring wire diameter
Mounting hole diameter
Tine end curve
Minimum effective circumference on one side
JB/T 694393
Drawing Type of spring teeth
Unit of measurement
Value and tolerance
200±3
5 Technical requirements
JB/T 6943--93
Tine should comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. In addition to meeting the requirements of this standard, spring teeth should also comply with the relevant provisions of GB1239.3. 5.2
The mechanical properties of the materials used to make the spring teeth shall comply with the provisions of Class B in GB4360. The materials used to make the spring teeth must have qualified certification documents and can only be used after being re-tested by the user unit. The surface of the spring teeth should be smooth. No cracks, dents or other defects are allowed at the bends. The basic parameters and tolerances of the spring teeth shall comply with the provisions of Table 1. The symmetry of the spring tooth arm to the center line of the mounting hole shall comply with the provisions of the figure. The limit deviation of the spring characteristic shall comply with the 3rd level specified in Article 4.3.2 of GB1239.3. The gap between the spring tooth rings shall be within 0.2mm. The surface of the spring teeth shall be rust-proofed.
After the picker is operated for 160h, the broken tooth rate of the spring teeth shall be within 5%. Test method
The inspection of the surface quality of the spring teeth shall be carried out in accordance with Article 5.7 of GB1239.3. The spring characteristic test shall be carried out in accordance with Article 5.1 of GB1239.3. The inspection of the spring outer diameter, free angle and spring tooth length shall be carried out in accordance with the provisions of Articles 5.2, 5.3 and 5.5 of GB1239.3 respectively. The spring tooth arm spacing, spring wire diameter, mounting hole diameter and symmetry of the spring tooth arm to the center line of the mounting hole. Use general or special measuring tools to measure the gap between spring teeth. 6.4
The gap between spring teeth is measured by a 0.2mm feeler gauge. 6.6 The surface anti-rust treatment and the minimum number of effective figures on one side are inspected by visual inspection. 6.7 The determination of the broken tooth rate is carried out simultaneously with the production test of the machine. Calculated from the start of the machine, when the operating time reaches 160h, the number of broken teeth of the picker is counted, and the broken tooth rate is calculated by the following formula: ×100
Where: L—Broken tooth rate, the number of broken spring tooth arms accounts for the percentage of the total number of picker spring tooth arms, %; D. —The number of broken spring tooth arms, pieces;
M.-—The total number of picker spring tooth arms. pieces. 7 Inspection rules
7.1 The spring teeth must be inspected and qualified by the quality inspection department of the manufacturer before they can leave the factory, and a product certificate must be attached. 7.2 The sampling plan for batch inspection shall comply with the provisions of GB2828. A normal inspection one-time sampling plan is adopted. 7.3 The classification and judgment rules for unqualified factory inspection shall comply with the provisions of Table 2. 7.4 The determination of the broken tooth rate is carried out in conjunction with the type inspection of the machine (valid for three years). 3
Inspection level, S-2
Unqualified classification
Surface quality
Spread between spring tooth arms
Spring characteristics
JB/T .6943 -- 93
Table 2 Unqualified classification and sampling judgment tableWww.bzxZ.net
Sample code; C
Free angle of spring tooth arm
Symmetry of spring tooth arm to the center line of the mounting hole Spring tooth length
Outer diameter of spring
Diameter of spring steel wire
Diameter of mounting hole
Surface anti-rust treatment
Gap of spring tooth ring
Minimum effective circumference on one side
Marking, packaging, transportation and storage
Sample size-5
Chapter of this standard
Qualified quality level
Batch N~281-500
Chapter of this standard test method
Spring teeth should be cleaned before packaging, and packed in strong and waterproof neutral paper or material bags and then put into the packaging box. The spring teeth packaging should be reliable, and the weight of each box shall not exceed 25kg. Container transportation can also be used as needed. The packaging box should be accompanied by a product certificate. The certificate includes the following contents: a.
Manufacturer name:
Product name:
Manufacture date or production batch number;
Quality inspection department seal
The packaging box should be marked on the outside:
Manufacturer name and address:
Product name:
Number of pieces;
Gross weight;
Consignee and address:
"Handle with care", "Avoid moisture" and other marks; Date of manufacture.
Products should be stored in a ventilated and dry warehouse. Additional notes:
This standard was proposed and managed by the Hohhot Animal Husbandry Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Hohhot Animal Husbandry Machinery Research Institute. The main drafter of this standard is Su Zhengfan.
People's Republic of China
Mechanical Industry Standard
Grass Picker Spring Teeth
JB/T 694393
Published by the Mechanical Standardization Research Institute of the Third Department of Mechanical Engineering Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Format 886×12301/16 Printing Sheet 1/2 Number of Words 8000 First Edition December 1993 First Printing December 1993 Printing Effect C0.001-500 Price 3.00 Yuan
No. 1267
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