This standard applies to the painted mud plates and stainless steel mud plates for bicycles specified in QB1714 "Bicycle Naming and Model Compilation Method". QB/T 1722-1993 Bicycle Mud Plate QB/T1722-1993 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
Bicycle
QB/T1722-93
Subject Content and Scope of Application
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of bicycle mud plates (hereinafter referred to as "mud plates"). This standard applies to the painted mud plates for bicycles specified in the "Nomenclature and Model Compilation Method" of QB1714 "Bicycle
and stainless steel mud plates.
Cited standards
GB2828 Sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches)GB2829 Sampling procedures and sampling tables for periodic inspection (applicable to inspection of production process stability)GB12742
QB/T1217
QB/T1218
3 Product categories
Technical conditions for bicycle testing equipment and instrumentsTechnical conditions for bicycle electroplating
Technical conditions for bicycle paint
3.1 Varieties
Divided into paint clay plates and stainless steel clay plates.
3.2 Types, specifications and parts names (see Figure 1 and Table 1) 2
Front mudboard
Rear mudboard
1 Front mudboard, 2 Front mudboard joint: 8-mudboard outer pad; 4-mudboard inner pad, 5 Front and rear mudboard support sticks; 6-rear mudboard Figure 1
Approved by the Ministry of Light Industry of the People’s Republic of China on April 15, 1993 and implemented on December 1, 1993
Wheel diameter series
Mudboard radius
4 Technical requirements
4.1 Painted mudboard
4.1.1 Appearance
QB/T1722-93
4.1.1.1 The cross-sectional shape is symmetrical. There shall be no obvious wrinkles and distortion on the outer surface, and there shall be no sharp edges and burrs on the surface. 4.1.1.2 The film shall be uniform in color, smooth and flat, without cracks or paint leaks, and the front view shall not have obvious defects such as flow scars, aggregated sand, and wrinkles.
4.1.1.3 The markings and decals shall be straight and clear. 4.1.2 The impact resistance of the paint film shall comply with the provisions of Article 4.2 of QB/T1218. 4.1.3
The corrosion resistance of the paint film shall comply with the provisions of Article 4.3 of QB/T1218 for Class I parts. 4.1.4 The hardness of the paint film shall comply with the provisions of Article 4.4 of QB/T1218 for Class I parts. 4.2 Stainless steel mud plate
4.2.1 Appearance
4.2.1.1 The cross-sectional shape shall be symmetrical, and there shall be no obvious wrinkles or distortion on the outer surface. 4.2.1.2 Sharp edges shall not be exposed, and both ends of the mud plate shall be curled or coated with plastic. 4.2.2 Surface roughness
The surface roughness Ra of polished clay board shall not be greater than 1.6um. 4.3 Clay board support stick
4.3.1 Appearance of painted support stick
4.3.1.1 The shape shall be symmetrical and shall not have obvious distortion. 4.3.1.2 The surface shall not have cracks and serious defects such as flow scars, wrinkles, paint leakage, etc. 4.3.2 Chrome-plated support stick
4.3.2.1 Appearance
The surface shall not have blistering, peeling, burning black, bottom exposure, yellowing, obvious burrs, spots, pinholes, etc. 4.3.2.2 The anti-corrosion ability shall comply with the provisions of QB/T1217 Article 5.4.1 Class II parts. 5 Test methods
The testing equipment and instruments used in the tests of this chapter shall comply with the provisions of GB12742. 5.1 Paint mud board
5.1.1 Appearance test
Visual inspection.
5.1.2 Paint film impact strength test
QB/T1722—93
5.1.2.1 The paint film impact position is on the front surface of the mud board. 5.1.2.2 The paint film impact strength test shall comply with the provisions of Article 5.2 of QB/T1218 (see Figure 2). 818+os
5.1.3: Paint film corrosion resistance test
5.1.3.1 The test surface of the paint film corrosion resistance test is the front surface of the mud board. 5.1.3.2 The paint film corrosion resistance test shall comply with the provisions of Article 5.3 of QB/T1218. The erosion position is shown in Figure 8 Figure 3
5.1.4 Paint film hardness test
QB/T1722-93
5.1.4.1 The paint film hardness test position is on the front view surface of the clay board. 5.1.4.2 The paint film hardness test is in accordance with the provisions of Article 5.4 of QB/T1218 (see Figure 4). Lead bag
Direction of pencil movement
5.2 Stainless steel clay board
5.2.1 Appearance test
Visual inspection.
5.2.2 Surface roughness test
Wipe the surface of the clay board clean and compare it with the polished standard sample block. 5.3 Clay board support stick
5.3.1 Paint support stick appearance test
Visual inspection.
5.3.2 Chrome-plated support rod
5.3.2.1 Appearance test
Visual inspection.
5.3.2.2 Anti-corrosion test shall be carried out in accordance with the provisions of Article 5.4.2 of QB/T1217. 6 Inspection rules
6.1 Products must be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a certificate of conformity before they can leave the factory. 6.2 Unit product: pair.
6.3 Factory inspection
GB2828 shall be adopted.
6.3.1 Sampling plan: secondary sampling plan. Support iron
6.3.2 Batch quality: calculated by the number of unqualified products per 100 units of products. 6.3.3 Inspection items, inspection level (IL), unqualified classification, and qualified quality level (AQL) are shown in Table 2. —96-
Product name
Painted clay board
Stainless steel clay boardbzxZ.net
Chrome plated support
6.4 Type test
GB2829 is adopted.
Inspection items
6.4.1 Sampling plan: secondary sampling plan. QB/T1722—93
Articles of this standard
Unqualified classification
6.4.2 Batch quality: calculated by the number of unqualified products per 100 units of products. 6.4.3 Inspection items, discrimination level (DL), unqualified classification, unqualified quality level (RQL), sample size (n), and judgment array are shown in Table 8.
Inspection cycle: one month.
Painted clay board
Stainless steel clay board
Chrome-plated stick
Inspection items
Paint hardness
Impact strength of paint film
Corrosion resistance of paint film
Surface roughness
Corrosion resistance
7 Marking, packaging, transportation, storage
Articles of this standard
7.1 Marking
The following markings shall be placed on the outside of the product packaging box: a. Manufacturer name; b. Product name; c. Trademark; d. Unqualified; e. Product model or mark; e. Standard code, number, name (can also be marked on the product or manual); f. Box size (length × width × height) and volume; sample size
Determination array
A,=1 R,=8
A2=4R2=5
A,=1R,=8
A,=4R,=5
A,=1 R,=8
A-4R=5
9. Quantity:
h. Net weight and gross weight
i. "Handle with care" and "Afraid of moisture";
i. Factory date or production batch number.
7.2 Packaging
QB/T1722--93
The mud board shall be packed according to the supply and demand agreement, and the product certificate shall be attached to the packing box. 7.3 Transportation
The packaging box containing the product should be placed flat, and should be handled with care and not thrown during transportation. It should not be exposed to the sun or rain during transportation. It is strictly forbidden to mix it with corrosive items such as acids and alkalis for transportation. 7.4 Storage
The product should be stored in a dry, ventilated room that can be protected from rain and snow. It must not be stored together with active chemicals or dust-generating items. The box should be stably padded and at least 100mm from the ground. 7.5 The product should not rust within 9 months from the date of leaving the factory under normal transportation and storage conditions. Additional instructions:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Bicycle Standardization Center. This standard was drafted by Wuxi Bicycle Parts Factory No. 2, Ningbo Daily Stainless Steel Products Factory, Guangzhou Bicycle Mud Plate Factory, and Jiangsu Xinghua Huanzi Alloy Steel Strip Factory. The main drafters of this standard: Miao Mengji and Gu Bolun. 98-
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