JB/T 7155-2007Wheels for wheeled construction machinery - Technical requirements (English PDF)

4.6 Bead seat

4.6.1

The thickness reduction of fillet radius of the bead seat of the rim and pressure-delayed wheel rim shall not exceed 15% of the actual size of the thickness of the pressed base metal. Crack is not allowed.

4.6.2

The area of fillet radius of bead seat and the matching area between rim and tire shall be smooth.

4.7 Seat ring

4.7.1

Seat ring shall be smooth, flat and shall be agile for disassembly-assembly.

4.7.2

Roundness tolerance of seat ring shall comply with the following requirements:

a) When the nominal diameter of wheel rim is less than or equal to 889mm, it shall not be greater than 1.0mm;

b) When the nominal diameter of wheel rim is greater than 889 mm, it shall not be greater than 1.5 mm.

4.8 Valve hole

Surrounding area of valve hole does not allow burr and edge.

4.9 Wheel disk

4.9.1

Wheel disk shall be manufactured with steel plate with not-more-than 1 welding seam.

4.9.2

The flatness tolerance of wheel disk mounting surface shall comply with the following requirements:

a) When the nominal diameter of rim is less than or equal to 406.4mm, it shall not be greater than 0.4mm;

b) When the nominal diameter of rim is greater than 406.4 mm or is less than or equal to 635mm, it shall not be greater than 0.6 mm;

c) When the nominal diameter of rim is greater than 635 mm , it shall not be greater

50mm~70mm;

b) When the diameter of lock ring is equal to or more than 508 mm, it shall be pulled

70mm~90mm;

5.3.2

The roundness tolerance of lock ring shall be tested by fitting the lock ring onto test cylinder, and the gap shall be at 1/4-at-least arc length with evenly reduced on both sides (4.3.2).

5.4

Bending fatigue strength test of wheel shall operate for 1000h with the host-machine before it is disassembled, and inspect the deformation (4.2.4).

5.5

The tightness test of the tubeless wheel - MOUNT the tire on the wheel, INFLATE to slightly larger than the rated pressure, PLACE at room temperature for 72h and

TEST with tire pressure gauge (4.10).

6.1

Wheel shall be tested by the quality inspection department of the manufacturer according to the drawings, relevant documents and this Standard, only after test pass can it leave the factory.

6.2

Wheel's surface quality, bead seat, perimeter and location of bolt holes shall be checked for each product, and the remaining items may be sampling-tested.

6.3

Sampling inspection of wheels shall comply with provisions of GB/T 2828.1, this

Standard selects the following programs:

a) Batch: 100 pieces of wheels as 1 batch;

b) Inspection level: general level II;

c) Pass quality level: AQL=10;

d) Accuracy of sampling plan: normal inspection, transfer rules may be used.

e) Type of sampling plan: using one-time sampling plan.

7.1

The wheels shall be marked at the prominent location:

a) Manufacturer's name or trademark;

b) Product name;

c) Wheel's sign;

d) Inspection sign;

e) Manufacturing date or production serial number.

7.2

Wheel's packaging shall comply with the requirements of railway and highway transportation and ensure normal transportation without damage.

7.3

When transporting the wheel, its surface shall not have a serious bump and scratch.

7.4

Product passing inspection shall be placed at location without corrosive media, and stored at location with ventilation, dry and measures of rain-proof.

References and Original Chinese Documents

[1] JB/T 7155-2007 Wheeled Construction Machinery Wheel technical conditions.

[2] GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection.

[3] GB/T 2933 Wheels and rims for pneumatic tires. Vocabulary, designation and […]