JB/T 7862.1—2001 JB/T 7862.1-2001 Agricultural machinery cutter blade guard JB/T7862.1-2001 Standard download decompression password: www.bzxz.net

ICS 65. 060. 50
Machinery Industry Standard of the People's Republic of Chinawww.bzxz.net
JB/T7862.1-2001
Agricultural Machinery
Guard of Cutter Bars
Guard of Cutter Bars for Agricultural Machinery2001-09-03Promulgated
China Machinery Industry Federation
2001-12-01Implementation
JB/T7862.1-2001
This standard is a revision of JB/T78621-1995 "Guard of Cutter Bars for Agricultural Machinery". Compared with B/T78621-1995, the main technical contents of this standard have been changed as follows: 1. Type I non-fixed blade casting guard has been added, and the structure of Type IV guard has been improved: 2. The technical requirements, inspection rules, and the contents of marking, packaging, transportation and storage have been adjusted. This standard replaces JB/T78621-1995 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by the National Technical Committee for Agricultural Machinery Standardization. The responsible drafting units of this standard are: China Agricultural Mechanization Science Research Institute, China Harvest Corporation, Shanghai Nonggongshang Group Xiangming Corporation, and Jilin University of Technology Roller Forging Factory.
The main drafters of this standard are: Zhou Chunlin, Li Zhiqing, Wu Junfeng, Chen Dafeng, and Sun Guobin. This standard replaces the following versions: ——NI9-1963, GB1210-1975, GB1210-1986, JB/T7862.1-1995; —NI206-1980, B/T7862.1-1995. 1 Scope
Machinery Industry Standard of the People's Republic of China
Agricultural Machinery
Cutting Edge Guards
Guard df cutterbarsfor agriculturalmadhineryJB/T 7862.1-2001
Replaces JB/T7862.1-1995
This standard specifies the main structural features, technical requirements, inspection rules, marking, packaging, transportation and storage of cutting edge guards for agricultural machinery cutting (hereinafter referred to as cutting edge guards). This standard applies to cutting edge guards for agricultural machinery cutting. Cited 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 will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 699—1999
GB/T 7101991
GB/T 2828—1987
GB/T9440—1988
3 Types and basic dimensions
High-quality carbon structural steel
High-quality carbon structural steel hot-rolled thin steel plates and steel stripsBatch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Forgeable cast iron parts
3.1 Edge guards are divided into five types
Type I: applicable to Type I cutters;
Type II: applicable to Type IⅡI cutters;
Type IIII: applicable to Type IIII cutters;
Type IV: applicable to Type IV cutters;
Type V: applicable to Type V cutters.
3.2 The basic type and size of the blade guard shall comply with the provisions of Figures 1 to 5. For single and double blade rests and tongue guards of V-type blade guards, see Appendix A. 3.3 Marking examples
Type I blade guard:
Blade guard 1JB7862.1—2001
Approved by China Machinery Industry Federation on September 3, 2001, implemented on December 1, 2001
JB/T 7862.1-2001
Figure 1Type I blade guard
AA rotation
JB/T 7862.1—2001
a) Type II blade guard
b) Type II blade guard without fixed blade
JB/T 7862.1—2001
2*55030
Figure 3IⅢI type blade guard
2×±10.3
7862.1-2001
Figure 4IV type blade guard
JB/T7862.1—2001
1-Tongue guard; 2Single and double blade guard buttsFigure 5V type blade guard
4Technical requirements
JB/T 7862.1—2001
4.1The blade guard shall comply with the requirements of this standard and be manufactured according to the drawings approved by the prescribed procedures. 4.2I, II and III type blade guards shall be made of forgeable cast iron not lower than KTH350-10 specified in GB/T9440, and other materials with mechanical properties not lower than those specified are allowed to be used. Forged IV-type blade guards shall be made of 15, 20 or 45 steel as specified in GB699. The edge hardness of blade guards made of 15 and 20 steel is 58~62HRC, and the edge hardness of blade guards made of 45 steel is not less than 54HRC. Ductile iron and materials with mechanical properties not less than the specified materials are also allowed to be used. The edge hardness of blade guards made of ductile iron shall not be less than 5CHRC. The knife holder of V-type blade guards shall be made of cold-rolled steel plates as specified in GB/T710. 4.3 The surface of the blade guard shall be smooth, without burrs, flash and cracks. 4.4 The blade guard with riveted fixed blade shall be firmly riveted, and the rivet head shall be flush with the surface of the fixed blade. 4.5 The two planes of the fixed blade shall be located on the same plane, and the position accuracy of the two planes shall be 0.3mm. 4.6 For Type I, I, IIII and V blade guards, the plane in contact with the blade guard beam shall be machined to ensure that the relative position of the plane and the plane on which the fixed blade is installed is 0.3mm in inclination or parallelism. The plane in contact with the blade guard beam of Type IV blade guard shall be machined to ensure that it is parallel to the blade edge plane formed by forging, machining and heat treatment of the blade guard, with a parallelism of 0.3mm. 4.7 Blade guards shall be treated with rust prevention.
5 Inspection rules
5.1 Factory inspection
5.1.1 Inspection items and indicators shall be determined in accordance with the technical requirements, product drawings or order contracts specified in this standard. 5.1.2 Batch-produced blade guards shall be inspected and qualified, and accompanied by product certificates. 5.1.3 Blade guards shall be submitted for acceptance in batches. Each batch shall be subjected to appearance inspection, and sampling inspection of dimensions, materials and mechanical properties shall be carried out in accordance with the provisions of GBT2828. The specific inspection plan shall be carried out in accordance with the secondary normal inspection sampling plan specified in GB2828, and the qualified quality level (AQL) is 4.0.
5.2 Final inspection
The blade guard shall be subject to final inspection by the quality inspection department of the manufacturer according to the order contract. 6 Marking, packaging, transportation and storage
6.1 The manufacturer's trademark and model shall be forged, cast or punched on the blade guard. 6.2 When the blade guard is shipped separately, the weight of each package shall not exceed 50kg6.3 The outside of the package shall be marked with:
a) Blade guard name, model and quantity;
b) Weight;
c) Manufacturer name;
d) Product standard number:
e) Factory number and factory date;
f) Storage and transportation mark.
6.4 The manufacturer's quality inspection certificate shall be attached to the package. 6.5 Measures should be taken to prevent loss or damage due to bumps during transportation, loading and unloading. 6.6 Measures should be taken to prevent rust and damage during storage.
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