This standard specifies the conventional inspection method for the groove of ordinary and narrow V-belt pulleys (non-grouped or grouped pulleys) with effective width. GB/T 11356.2-1997 Belt drive Ordinary and narrow V-belt drive pulleys (effective width system) Groove inspection GB/T11356.2-1997 Standard download decompression password: www.bzxz.net

GB/T11356.2—1997
This standard is equivalent to ISO9980:1990 "Groove shape inspection of belt drive V-belt pulleys (effective width system)". This standard revises the groove shape inspection part of the effective width system narrow V-belt pulleys specified in GB11356--89 "Groove shape inspection of belt pulleys for ordinary and narrow V-belt transmissions". The revised standard specifies the groove shape inspection method of ordinary and narrow V-belt pulleys of the effective width system, in which the comprehensive inspection of the groove cross section replaces the original inspection of the groove angle and groove depth; the circular runout inspection of the wheel groove working surface and the outer edge of the pulley is added, the inspection of the groove spacing and effective diameter is retained, and the inspection method is improved. The groove shape inspection method of ordinary and narrow V-belt pulleys of the reference width system can be found in GB11356.1-1997 "Groove shape inspection of belt pulleys for ordinary and narrow V-belt transmissions (reference width system)". This standard shall replace the narrow V-belt pulley groove inspection part in GB11356-89 from the date of implementation on July 1, 1998. This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the Machinery Standardization Research Institute of the Ministry of Machinery Industry. The drafting units of this standard are: Machinery Standardization Research Institute of the Ministry of Machinery Industry, Shijiazhuang Sprocket General Factory. The main drafters of this standard are: Qin Shuan, Du Gang, Mao Lixin, Wu Guochuan. 192
GB/T11356.2—1997
ISO Foreword
The International Organization for Standardization (ISO) is a worldwide federation of national standards bodies (ISO members) of various countries. The work of formulating international standards is usually carried out by technical committees. Each ISO member interested in a project for which a technical committee has been established has the right to participate in the committee. International organizations, governments and non-governmental organizations associated with ISO also participate in the work of ISO. ISO maintains close cooperation with the International Electrotechnical Commission (IEC) in all aspects of electrotechnical standardization. Draft international standards adopted by technical committees shall be sent to all ISO members for voting. The draft is published as an international standard with an approval rate of at least 75% of ISO members voting.
International Standard ISO9980 was drafted by Technical Committee ISO/TC41 Pulleys and Belts (including V-Belts) SC1 V-Belts and Pulleys.
Appendix A of this international standard is for reference only. 193
1 Scope
National Standard of the People's Republic of China
Belt drives
Pulleys for classical and narrow V-belt drives
Groove inspection
(effective width system)
Belt drives-Pulleys for classical and narrowV-belts drives(system based on effective width)-Geometrical inspection of groovesGB/T11356.2--1997
eqyIS09980:1990
Replaces GB11356-89
This standard specifies the conventional inspection method for grooves of classical and narrow V-belt pulleys (non-grouped or grouped pulleys) based on the effective width system. 2 Basic Procedure
The inspection of pulleys shall be carried out according to the following four consecutive inspection procedures: a) Inspection of groove section (see Chapter 3);
b) Inspection of groove spacing (see Chapter 4);
c) Inspection of effective diameter (see Chapter 5); d) Inspection of circular runout (see Chapter 6).
3 Inspection of groove section
3.1 Groove section dimensions
The specific dimensions of the groove section shall comply with the provisions of the relevant standards. The inspection parameters are shown in Figure 1 and Table 1. be
Approved by the State Administration of Technical Supervision on December 30, 1997 194
Implemented on July 1, 1998
Groove section dimensions
Effective width
Maximum increment of groove top
Maximum depth of top arc
GB/T11356.2—1997
The g value is only applicable to pulleys used with combined V-belts. 1
The actual outer diameter of the pulley shall not exceed d. +2g. 2
3The minimum outer diameter of the straight edge of the wheel groove is d. +2g. 3.2 Inspection
3.2.1 Limit gauge
The groove section shall be inspected with the limit gauge shown in Figure 2 or Figure 7, code
There shall be a limit gauge for each standard angle of each groove section in accordance with the standard. The limit gauge shall be marked with the groove type and groove angle. 3.2.2 The limit gauge for the non-united V-belt groove section inspection is shown in Figure 2.
b1 be—2g *
hi=he-qwww.bzxz.net
Specified value (no tolerance)
Minimum value
Maximum value
Maximum value
The "minimum" end of the limit gauge is used to check the minimum value of the groove angle. In accordance with the specified groove angle, the bottom angle of the gauge shall be in contact with the groove side (see Figure 3) or evenly against the groove side.
The "maximum" end of the limit gauge is used to check the maximum value of the groove angle, effective width, groove depth, and the maximum depth α value of the top arc. If the top of the gauge at the width b1 is in contact with the straight side of the groove, the groove angle, effective width, groove depth, and maximum depth 9 of the top arc are all in accordance with the regulations (see Figure 4).
GB/T 11356.2-1997
If only the corner vertex of the "largest" end of the gauge contacts the groove, the groove angle is too large. Maximum
If the corner vertex of the gauge at the width 6 is located above the straight side of the groove, the effective width is too small or the arc depth g value of the groove top is too large (see Figure 5). Maximum
3.2.3 See Figure 7 for the limit gauge for the cross section inspection of the wheel groove for combined V-belts.
br=be——2q · tan -
b≥e (see 4.1)
hi=h,—q
The "smallest" end of the limit gauge is used to check the minimum value of the groove angle. The bottom angle of the limit gauge should contact the side of the groove (see Figure 3) or evenly lean against the side of the groove.
The "largest" end of the limit gauge is used to simultaneously check the maximum value of the groove angle, the effective width, the groove depth, the groove top arc depth value and the groove top increment & value. 196
GB/T11356.2—1997
If the corner vertex of the gauge at width b1 contacts the straight side of the groove (see Figure 8), the groove angle, effective width, groove top arc depth 9 value, groove top increment g value and groove depth are all in compliance.
If only the corner vertex of the "largest" end of the gauge contacts the groove, the groove angle is too large. If the platform of the gauge contacts the outer edge of the pulley and the gauge is not firmly placed in the groove, the groove top increment g value is too large (see Figure 9). If the corner vertex of the gauge at width b1 is located above the straight side of the groove, the effective width is too small or the groove top arc depth 9 value is too large (see Figure 10).
If the gauge contacts the bottom of the groove, the groove depth is too small (see Figure 6). 4.1 Dimensional parameters The following dimensions shall comply with the provisions of the relevant standards (see Figure 11). 4.1.1 Groove spacing The nominal value e and tolerance of the distance between the center lines of two adjacent groove sections. 4.1.2 The maximum cumulative deviation of the nominal value e between any grooves of a V-belt pulley. 4.1.3 The distance between the end face of the pulley and the center line of the adjacent groove section Figure 9 For all single-groove or multi-groove pulleys, the factory value of the distance between the end face of the pulley and the center line of the adjacent groove section shall be specified. In order to facilitate the alignment of the pulley, the positive and negative deviations of the value may be specified. 197
4.2 Inspection
GB/T 11356. 2-1997
Use the measuring device with replaceable measuring balls shown in Figure 12 to inspect the groove spacing (the corresponding measuring balls should be replaced for different groove types). The diameter of the measuring ball should comply with the provisions of Article 5.1.
When the measuring ball is completely placed in the wheel groove, the sliding device of the movable measuring ball should be fixed and the distance X should be measured with a vernier caliper or micrometer. The measured groove spacing e value is calculated according to formula (1):
e=X-de
Where; e—
slot spacing, mm
X—-distance between the outer ends of the two measuring balls, mm; one measuring ball diameter, mm.
5 Inspection of effective diameter
5.1 Dimensional parameters
The following dimensions should comply with the provisions of the relevant standards. 5.1.1 Nominal value of effective diameter d. 5.1.2 Tolerances between the effective diameters of the grooves in multi-groove pulleys. 5.1.3 Diameter ds of the measuring ball or measuring rod and its tolerance. 5.1.4 Correction term 2 yuan.
2α can be calculated by formula (2):
2x = d(1 +
Where: b. — effective width, mn;
groove angle, (°);
-diameter of measuring ball or measuring rod, mm.
Correction term should be rounded in an appropriate manner.
5.2 Inspection
Put two measuring balls or measuring rods into the groove of the wheel to be measured (see Figure 13), and measure the distance K between the external tangent surfaces of the two measuring balls or measuring rods parallel to the pulley axis. This distance can be measured with a plane parallel measuring tool. The effective diameter is calculated by formula (3):
Where: 2r is the correction term.
(3)
6 Inspection of circular runout
6.1 Dimensions and tolerances
GB/T 11356. 2—1997
The following dimensions and tolerances shall comply with the provisions of the relevant standards. 6.1.1 The radial runout tolerance t of the outer circle is based on the center line of the shaft hole as the reference A. 6.1.2 The oblique runout tolerance t2, t2 shall be measured within the α value range perpendicular to the working surface of the wheel groove. The reference consists of reference A and reference B (the pulley end face that matches the shaft shoulder end face).
6.1.3 The distance a between the measuring position and the effective diameter d. 6.2 Inspection
At the measuring position (see Figure 14), the radial and oblique runout during one rotation around the reference A shall not be greater than the specified value. A
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