This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of pruning shears. This standard applies to pruning shears. When there are special requirements for the product, it is not subject to the restrictions of this standard. QB/T 2289.4-2001 Gardening Tools Pruning Shears QB/T2289.4-2001 Standard download decompression password: www.bzxz.net

Gardening tools
Pruning shears
QB/T 2289.4—2001
This standard is based on the requirements of the State Bureau of Technical Supervision to clean up and rectify national standards. The original national standard GB6868-1986 "Pruning shears" has been transformed into an industry standard (this standard was once issued by the State Light Industry Bureau [1999] No. 112 document and the conversion standard number was 0B3854-1999, which is still the former).
This standard is not equivalent to the German standard DIN32610-1976 "Dimensions and materials of fore-branch shears", and the fatigue and compression test of shear springs is cancelled.
This standard is proposed by the General Business Department of China Light Industry Federation. This standard is under the jurisdiction of the National Industrial Standardization Center. This standard is drafted by Shanghai Gardening Research Institute, and Jiangsu Jinlu Group Co., Ltd., Shandong Gardening Tools General, Zhangjiagang Fucai Garden Tools Co., Ltd., and Dongjie Xili Shears Factory participated in the drafting. The main drafters of this standard are Lin Meide, Shao Xuehai, Meng Xiangtuan, Ji Jianrong, and Lv Xikui. From the date of implementation of this standard, the industry standard QB/T3854-1999 "Pruning Shears" issued by the former State Light Industry Bureau shall be abolished, and the light industry industry standard of the People's Republic of China, Gardening Tools, Pruning Shears, QB/T 2289. 4-2001, shall replace QB/T 3854-j999. This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of pruning shears. This standard applies to pruning shears. When there are special requirements for the product, it may not be restricted by this standard. 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 will be revised, and the parties using this standard should discuss the possibility of using the latest version of the following standards.
Metal Rockwell hardness test method
GB/T 230--1991
GB/T 1911-1991
Copy paper
GB/T 6867—1986
Gardening tools
3 Product classification
3.1 Type
Inspection, marking and packaging
The types of pruning shears are shown in Figures 1 to 4. 3.2 Basic dimensions
The basic dimensions of pruning shears are as specified in Table 1. Table 1
Basic dimensions
Limit deviation
Note: If the user has other requirements for the dimensions, they can be determined through negotiation. 3.3 Marking examplebzxz.net
Basic dimensions
The marking of the product consists of the product name, specification and standard number. Example of marking for 150mm pruning shears:
Pruning shears 150rmmQB/T2289.4—2001Approved by China Light Industry Federation on July 16, 20011
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Limit deviation
Basic size
Limit deviation
2001-11-01 Implementation
QB/T2289.4—2001
1-Large shearing piece: 2-Small through piece: 3-Off-axis bolt: 4 Shear spring; 5-Steel buckle
1-Piece: 2-Small piece: 3-Axis bolt: 4-Shearing yellow: 5-: 6-Plastic outline 2
4 Technical requirements
4.1 Short change
QB/T 2289.4-2001
1-Big shear blade: 2-Small blade: 3-Front shear shaft screw peak: 4-Hook: 5-Hook sweep: 6-Army chart 3
1-Manual shear blade: 2-Small blade: 3-Shear shaft bolt: 4-Shearing rod: 5-Steel buckle: 6-Handle 4
The cut edge hardness of the manual shear blade of the pruning head should not be lower than 48HRC: The hardness of the blade of the small blade should be lower than 45HRC4.2 Performance
4.2.1 The shear head should be flexible to open and close, and the spring force should be uniform without jamming. The spring force of the shear spring should meet the requirements of Table 2.
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QB/T 2289. 4—2001
Load N
Haircutting compression disc
4.2.3 The cutting edge of the large shear blade should be sharp, the cutting line should be neat, without chipping and curling, and the shear blade should not be overcut after closing. 4.2.4 The pruning shears can smoothly cut copy paper and live branches. 4.3 Surface quality
4.3.1 The surface of the pruning shears should be smooth, without cracks, burrs, oxide scale and other defects. 4.3.2 The processing surface roughness Ra value of the shear head and shear handle is not less than 12.5um and 25um respectively. 4.3.3 The surface of the pruning shears should be polished, blackened or other surface treatments. The surface of the pruning shears with surface treatment should have a uniform protective layer and should not have the bottom exposed. 4.3.4 When the shear handle is decorated with plastic or organic paint, its surface should be uniform and bright in color, without adhesion, dripping, obvious flow marks, no color, no stickiness, and sufficient strength. 5 Test method
5.1 Hardness test
The hardness test is carried out in the middle of the shear blade and in the range of 5mm~10mm in front and behind according to the provisions of GB/T230. 5.2 Sharpness test
5.2.1 Use the full shear blade to vertically cut the C-level copy paper specified in GB/T1911. The cut surface should be smooth and neat, and there should be no fuzz or tearing.
5.2.2 Use a single blade to cut the live tree branches according to the provisions of Table 3. Table 3
Test material diameter
5.2.3 After 10 consecutive shears at the same edge, the edge should not show chipping or curling. 5.3 Dimension and surface quality inspection
5.3.1 The dimensions of pruning shears shall be measured with a special cardboard or a common measuring tool. 5.3.2 The surface roughness of pruning shears shall be compared with a standard sample. 5.3.3 The appearance quality of pruning shears shall be visually inspected. mm
5.3.4 After the combined pruning shears are placed at a height of 1m from the ground and fall freely onto the cement floor twice, there shall be no loosening, cracking, deformation, etc., and the paint shall not fall off in pieces. 5.4 Shear spring test
The shear spring force shall be tested with a spring tension and compression testing machine. 4
Inspection rules, marking and packaging
QB/T 2289. 4 -~2001
The inspection rules, marking and packaging of pruning shears shall comply with the provisions of GB/T68675
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