This standard applies to general bicycle rims. QB 1802-1993 Bicycle rims QB1802-1993 Standard download decompression password: www.bzxz.net

This standard refers to the International Standard for the Protection of Bicycles (7-3) and the following content and applicable scope: bicycle wheels. This standard specifies the bicycle wheels, including the purchase, sale, and distribution of bicycle wheels, product specifications, technical requirements, test methods, inspection regulations, marking, packaging, transportation, etc. This standard applies to general bicycles. 2 Reference standards GB 1702 Bicycle tires GB1957 Smooth surface gauge GB 2828 GB 2829 GB 7377
GB8060
GB12742
Batch inspection counting sampling procedure and sample drawing cycle inspection counting fast sampling procedure and sample drawing table bicycle tire series
Bicycle testing equipment
QB/T1217: Terms and special numbers in electroplating technology conditions
3.1 Terms
3.1.1 Nominal diameter
The diameter indicating the wheel specification.
3.1.2 Determined diameter
The design point of the straight-side wheel and tire.
3.1.3 Measurement 3.1.4 Bead seat
The part on the rim that provides support for the tire 3.1.5 Nominal inner width
Indicates the inner width of the rim specification:
3.1.6 Inner width at bead seat
Inner width at bead seat
3.1.7 Bead width
The measurement of the straight-sided wheel diameter from the point to the outer diameter of the wheel 3.1.8 Exposed surface
The visible surface of the wheel after the wheel is assembled. 3.2 No.
A Inner width at the seat
-calibrated diameter;
-calibrated circumference;
Measured diameter;
Measured circumference:
-Outer circumference:
G——side height,
Ring pressure width:
-Ring radius:
-Ring seat radius;
β-—Ring seat angle;
H·Section groove depth.
4 Product classification
4.1 Classification
QB1802-93
Rim types are shown in Table 1, which are divided into soft edge (ugly (BE) rim, straight edge (SS ) wheel, hook edge HB) rim. Type
Nominal inner width
Note: This specification is not recommended.
Surface shape
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4.2 Type and size
QE1802·93
4.2.1 Soft edge (BE) rim type is shown in Figure 1, section size is shown in Table 2
Nominal inner width
Soft edge (BE) rim diameter and circumference are shown in Table 8
4.2.3 Straight edge (SS) wheel auxiliary type is shown in Figure 2: Section size is shown in Table 4
Nominal inner width
QB 1802--93
Straight edge (SS) rim diameter and circumference are shown in Table 5. Table 5
1 (HB) Rim type is shown in Figure 8, and the cross-sectional dimensions are shown in Table 6. Hinged edge
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QB1802-93
4.2.6 The true diameter and circumference of the hooked edge (HB) wheel are shown in Table 76
The valve hole and strip are shown in Figure 4.
Valve hole
The valve hole diameter d is recommended to be the outer diameter of the valve nozzle plus 10.5mm, and the diameter of the strip is recommended to be the outer diameter of the strip mother plus 0.5mm. The recommended value of the distance K between the center of the sprocket hole and the center line of the wheel is shown in Table 8. 4.2.7.3
Soft edge (BE)
Side (SS)
Hook edge (HB)
4.2.8 The recommended table of suitable tires for conventional wheels is shown in Appendix B (reference)
4.3 Standard information example
5 Technical requirements
590 22
Nominal diameter
Nominal diameter
Network management source
For reference only
Design sequence number
Wheel type code
5.1 The type and size of the wheel shall comply with Articles 4 and 2. The dimensions without tolerance are recommended dimensions
5.2 The rim shall be smooth, and the rim in contact with the tire shall not have sharp edges and obvious burrs.
5.3 After the rim is electroplated, the appearance, surface roughness, coating thickness and corrosion resistance shall comply with the specifications of Class I parts in QB/121743.1.1, 5.2.1, 5.3.1 and 5.4.1. 5.4 The concavity on both sides of the wheel transmission joint is less than 0.25mm. 5.5 The strength of the wheel steel is as shown in the figure. Static load is applied to the wheel (load see Table 9), and the load is removed after 2 minutes. The rim will not change permanently.
5.B wheel, the distance between two adjacent holes is not more than 5mm.
Simplified table
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·Joint
Soft edge (BE)
Straight edge (SS)
Hook edge (HB)
6 Test method
QB1802-.93
Nominal groove width
The testing equipment and instruments used in this chapter shall comply with the provisions of GB12742. 6.7 Appearance, surface roughness, coating thickness, corrosion resistance 6.1.1 According to the provisions of 5.1.2, 5.2.2, 5.3.2, and 5.4.2 of QB/T 1217, the inspected parts are shown in Figure 6. The evaluation method of corrosion resistance shall be implemented in accordance with Appendix C of this standard.
6.1.2 The plating area of ​​the wheel is calculated according to the following formula: S-$,-s,-$.
formula: S" rim plating area, area,
S, effective unfolded area of ​​a wheel, see Appendix C (reference), dm2,
S——the sum of the area of ​​the strip hole and the 2mm range around it, dm; (de+2) 2
S,-nxx
Ss—, valve hole and surrounding 2mm area, dm\(di+2)
S,=tx(
Number of holes:
dValve hole diameter, dm;
d.--hole diameter, dm.
6.2 The inner width of the rim seat
is measured with a vernier caliper. The inner width of the straight-edge wheel seat is measured with a special vernier caliper.
Special vernier calipers are shown in Appendix A (Supplement) 6.3 The side height
is measured with a special depth vernier caliper. Crown Figure 7, Load
Inspected part
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Special depth vernier caliper, see Appendix (Supplement). 6.4 Circumference
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6.4, 1 The outer circumference of the soft-edged wheel and hook-edged wheel rim is measured with a special steel hunting ruler, which covers the outer edges of the two sides of the measured wheel, and records the results C2A, CB, respectively, and compares them with the C values ​​in Table 8, Table 7, and the special steel tape ruler is used for the mold core, Appendix A (Supplement). 6.4.2 Method for measuring the length of the old-edged wheel Method: 8. Use a special steel tape to measure the outer perimeter of the two sides CA, C, Method 6.4.1 Solution: b. Measure the two sides of the two points at which the two sides are parallel, and calculate the average value of the height A and B respectively. The measurement method is shown in the figure (the measurement point should avoid the joint)
c. Calculate the measured perimeter:
CACAZWGA
C,BC,B-&rCE
d. Compare C,A.C,B with C in Table 5.
6.5 Valve hole diameter | |tt||Measured with a special gauge (gauge tolerance GF1957: designed according to hole tolerance grade IT13). 6.6 Hole diameter
Measured with a special gauge (gauge tolerance B1957, designed according to tolerance grade IT13). 6.7 Concavity on both sides of the joint
Special joint placement special tool in the middle, see Figure 8. A (fill light)
6.8 Strength
Tested with a 0.5mm thick feeler gauge. Special feeler gauge See the attachment for reference only
6.8.1 Clamp the wheel sheath vertically on the strength testing machine, as shown in Figure 5. Xie Sheng 100% loading, record the reading of the measuring point before loading.
6.8.2 Add load steadily (load see Table 9) After 2 minutes, unload the load point: record the reading of the dial indicator, 6.8.3 The difference between the two readings is the permanent deformation of the rim. 118-
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6.9 The difference in the distance between any two adjacent strip holes
6.9.1 Use the outer caliper of a common vernier caliper to measure the shortest distance between the edges of the wheel holes. 6.9.2 Divide the minimum value by the maximum value measured. 7 Inspection rules
7.1 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. 7.2 Unit product: a single wheel.
7.3 Factory inspection: GB2828 is adopted.
7.3.1 Sampling plan: two-way sampling plan. 7.3.2 Batch quality: calculated by the number of unqualified products per 100 unit products. 7.3.3 Inspection items, inspection level (IL), unqualified classification, and acceptable quality level (AQL) are shown in Table 10. Table 10
Roughness of the surface
Difference in distance between the two sides of the jointwwW.bzxz.Net
Difference in distance between the holes
Contact document of this standard
7.4 Type inspection: Adopt CB2829.
7.4.1 Sampling plan: Two-time sampling plan. IL
7.4.2 Batch quality: Calculated by the number of unqualified products per hundred units of products. 7.4.3 Inspection cycle: Three months.
Unqualified classification
7.4.4 Inspection items, discrimination level (I), unqualified classification Unqualified quality level (RQL), sample size (n), and discrimination array are shown in Table 11.
Address-119—-
Inspection items
Corrosion resistance
Coating thickness
Valve hole diameter
Bar hole diameter
Articles of this standard
Marking Packaging, remote transmission, storage
8.1 Marking
Product packaging boxes should have the following markings:
b. Manufacturer name;
c. Product name;
d. Product model or mark:
e. Marking code, number, name:
F. Box size (length × width × height)
9. Quantity;
h. Net weight and gross weight:
, "Handle with care" and "Avoid moisture"
j. Date of publication or batch number.
8.2 Packaging
The packaging should be firm and reliable, and transported in a dry place.
8.3 Transportation
QB1802—-93
Uncategorized
Sample size
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Judgment array
Ac, -1 Rer=3
Arg=4 Res=5
Ac,-1 Re;-3
Aes=4 Rea=5
The packaging box containing the wheeled vehicle should be handled with care and should not be thrown. It should not be exposed to the sun or rain during transportation. It is strictly forbidden to mix and transport with corrosive items such as acid and silt. 8.4 These storage
Wheels should be stored in a dry, ventilated room that can prevent rain, and should not be stored together with active chemicals or dusty items. The box should be placed on a cushion, no less than 1100mm from the ground. 8.5 The product should not rust within 9 months from the date of leaving the factory under normal transportation and storage conditions. --120---
A1 Special vernier caliper See Figure A1
Q#1802-·93
Appendix A
Special magic tool
(supplement)
E-3589
1±003
80·0-8-0
1 :0-03
A2 Special depth vernier caliper See Figure A2.
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QB1802--93
For reference only
Figure A?
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