QC/T2 12— 1996

Motorcycles and mopeds

General specification for aluminum alloy integral wheels

1 Subject content and scope of application

This standard specifies the definition, technical requirements, test methods, inspection rules, marks, packaging, transportation and storage of aluminum alloy integral wheels for motorcycles and mopeds.

This standard applies to aluminum alloy integral wheels of motorcycles and mopeds, and other types of light alloy wheels can also be implemented with reference to this standard.

2 reference standard

GB 1 173 technical conditions for casting aluminum alloy.

Technical requirements for GB9438 aluminum alloy castings

GB/T 13202 motorcycle rim series

Test method for light alloy wheels of motorcycles and mopeds

JB2846 Electroplating and Chemical Treatment Coatings for Automobile

JB/Z 1 1 1 automotive paint

3 definition

Rim, spokes and hub are all aluminum alloy integrated wheels (hereinafter referred to as wheels).

4 technical requirements

Wheels shall be manufactured according to drawings and technical documents approved to a specified degree.

4. 1 performance requirements

A. dynamic bending fatigue

According to article 3 of QC/T2 1 1, after the test exceeding 105, the wheel shall be free from damage, crack, fracture, obvious deformation and abnormal joint looseness;

B. radial fatigue

According to article 4 of QC/T2 1 1, the wheel shall be free from damage, crack, fracture, obvious deformation and abnormal joint looseness after the test of 5× 105 revolutions or more;

C. radial impact

After the impact test according to article 5 of QC/T2 1 1, the wheel shall be free from damage, crack, obvious deformation, abnormal joint looseness and sudden drop of tire pressure by more than 50% due to damage to the rim surface after 30 seconds of impact.

People's Republic of China (PRC) * * and China Ministry of Machinery Industry approved the implementation of 1996-0 1-03.

QC/T2 12— 1996

D. Torsional fatigue

After carrying out the test for more than 105 cycles according to article 6 of QC/T2 1 1, the wheel shall be free from damage, crack, obvious deformation and abnormal joint looseness;

E. air tightness (only applicable to tubeless wheels)

After the test according to article 7 of QC/T2 1 1, there should be no air leakage around the rim within 2 minutes.

4.2 dimensions

4.2. 1 rim profile

The overall dimensions of the rim conform to GB/T 13202.

4.2.2 Rim circumference inspection

The inspection perimeter size of the rim shall comply with the provisions of GB/T 13202.

4.2.3 The radial circular runout and end circular runout of the rim are shown in Figure 1.

4.3 External quality

4.3. 1 The surface quality of castings shall be in accordance with Article 4.4 of GB9438.

4.3.2 Defects such as cracks, pores, shrinkage cavities and damage that affect the strength of castings are not allowed.

4.3.3 There should be no defects around the tire assembly surface and the rim valve hole that damage the functions of the outer tire, inner tube and valve.

4.3.4 The rims of tubeless vehicles are not allowed to have pinholes and other defects that affect air tightness.

4.4 Internal quality

The internal quality of castings shall be implemented according to Article 4.5 of GB9438.

4.5 materials

According to the product drawings, the main elements and impurities of the alloy of each furnace must be analyzed. On the premise that the mechanical properties of aluminum alloy materials are qualified, the impurity iron content of aluminum alloy materials shall not be greater than 0.3% when sampling from finished wheels.

4.6 Mechanical properties

4.6. 1 The mechanical properties of cast aluminum alloy single sample for wheels at room temperature shall meet the requirements in Table 1.

QC/T2 12— 1996

Table 1 Mechanical Properties of Single Casting Samples of Aluminum Alloy Materials

Mechanical properties of articles

Tensile strength σ b Mpa ≥200

Elongation δ 5% ≥7①

HB (5/250/30) ≥60

Note: ① Elongation requirements of pressure casting castings can be agreed by both the supplier and the buyer.

4.6.2 The single casting sample of each furnace or the blank sample cut from the castings of the same furnace shall be implemented according to Article 2.3 of GB 1 173.

4.7 heat treatment

The wheels shall be heat-treated, and the specifications shall be in accordance with Appendix A in GB 1 173.

4.8 surface treatment

Electrochemical oxidation treatment shall be carried out in accordance with article 12 of JB2864. Paint shall be carried out according to TQ4 in JB/Z11; When spraying plastic, it should be agreed by both parties.

4.9 Repair of Casting Defects

4.9. 1 When grinding is used to eliminate casting defects, the dimension after grinding shall be guaranteed to meet the tolerance of casting dimension.

4.9.2 Before heat treatment, when repairing casting defects by welding repair, the maximum depth of welding repair shall not exceed 5 mm ... After heat treatment, welding repair is not allowed.

5 test method

According to QC/T2 1 1.

6 inspection rules

The inspection of wheels can be divided into factory inspection and type inspection.

6. 1 ex-factory inspection

6. 1. 1 The wheels must be accompanied by the factory certificate. Users have the right to check and accept the wheels.

6. 1.2 Items and methods of ex-factory inspection

A. Appearance inspection According to Article 4.3, the samples selected by the manufacturer's technical and quality departments shall be visually inspected, and the samples may also be jointly determined by the supplier and the supplier.

B dimensional inspection shall comply with the provisions of article 4.2 and the requirements of product drawings;

C. Intrinsic quality: NDT shall be carried out before the products leave the factory. Non-destructive testing methods and sampling regulations shall be determined by both parties through consultation;

D. Materials: Check the material certificate and the chemical analysis report before the furnace, and the chemical analysis before the furnace shall comply with the provisions of Article 4.5;

E. Mechanical properties: The inspection report for checking the mechanical properties of materials shall comply with the provisions of Article 4.6;

F. Heat treatment: check whether the heat treatment inspection report meets the provisions of Article 4.7;

G. air tightness: when used for tubeless wheels, the air tightness test report shall comply with the provisions of article 4.1.e.

6.2 Type inspection

The wheels for type inspection must be products that have passed the factory inspection.

6.2. 1 Type inspection items

A. dynamic bending fatigue;

QC/T2 12— 1996

B. fatigue;

C. radial impact;

D. Torsional fatigue

E. air tightness (only applicable to tubeless wheels)

When the outer diameters of the rims and hubs of the front and rear wheels of the same motorcycle are the same, and the shapes and sizes of the spokes are the same, only the width of the rims is different, and only the front wheel is allowed to be used for the test, but the calculated load of the rear wheel should be used in tests A, B and D, and the maximum value of the impact hammer mass m calculated in the front and rear wheels should be used in test C. ..

6.2 Type inspection is required under the following circumstances:

A. new product identification;

B. the final product is transferred to the factory for production;

E. The annual production batch of products is less than 65,438+00,000 pieces, once a year; When the production batch in that year exceeds 10000 pieces, it shall be conducted once every six months;

F all design changes, major changes in materials and production processes that have an impact on strength;

G. It has been confirmed that the production of products has been stopped for one year and has been resumed.

6.3 Sampling Rules for Test Wheels

6.3. 1 The test wheels shall be randomly selected from the wheels that have passed the inspection by the manufacturer, and each piece shall be sampled once, belonging to the same production batch, with a sampling base of not less than 50 pieces.

6.3.2 Each test wheel can only be used for one performance test.

6.4 Treatment after wheel test

The wheel after the test must be isolated from other wheels, and it is forbidden to be used for loading.

6.5 Fault Handling Procedure for Type Inspection

In type inspection, when a performance is unqualified, double sampling is allowed for unqualified items. When one of them is still unqualified after double sampling, it is judged that the wheel type inspection is unqualified, and the wheels of the production batch to which the unqualified wheel belongs must be isolated immediately, and it is strictly forbidden to be used for loading.

7 Marking, packaging, transportation and storage

7. 1 symbol

7. 1. 1 The wheel manufacturer shall cast or engrave a mark with the following contents at a position that is easy to identify when the wheel is loaded and does not affect the strength of the wheel;

A. standard rim code;

For example: 2. 15× 16

B. Name or trademark of the manufacturer

C. Maximum design load for wheel calibration;

Example: max2500N

D. production year or batch number;

E For tubeless wheels, the following text must be added after the standard rim code:

Tubeless tubeless

7.2 packaging

7.2. 1 The packing box shall be firm, and the products shall not move or collide with each other in the packing box.

QC/T2 12— 1996

7.2.2 The outer arm of the packing box shall have the following words and signs:

A. the name and address of the manufacturer;

B. product name, specification and quantity;

C. year of manufacture;

D. volume (length× width× height);

E. gross weight;

F words or signs such as "handle with care" and "fear of humidity".

7.2.3 There should be a product certificate and a product packing list in the packing box.

7.3 transportation

During transportation, the wheels shall be protected from rain, moisture, throwing and violent collision according to the requirements of 7.2.2f F. ..

7.4 storage

Wheels should be stored in a dry, well-ventilated warehouse without harmful gases, and should not be stored with chemicals such as acid and alkali.

Additional notes:

This standard was put forward by the Ministry of Machinery Industry of People's Republic of China (PRC).

This standard is under the jurisdiction of the National Automobile Standardization Technical Committee.

This standard was drafted by the Fourth Design Institute of Nanchang Aircraft Manufacturing Company.

The main drafters of this standard are Ye and Zhang Pingyi.

(I don't know if it counts)