This standard specifies the conventional inspection method for the groove of ordinary and narrow V-belt pulleys of the reference width system. GB/T 11356.1-1997 Belt drive pulleys for ordinary and narrow V-belt drives (reference width system) Groove inspection GB/T11356.1-1997 Standard download decompression password: www.bzxz.net

GB/T 11356. 1—1997
This standard is equivalent to ISO255:1990 "Groove shape inspection of belt drive V-belt pulleys (reference width system)". This standard revises the groove shape inspection part of the reference width system ordinary V-belt pulleys specified in GB1135689 "Groove shape inspection of ordinary and narrow V-belt transmission pulleys". The revised standard specifies the groove shape inspection method of ordinary and narrow V-belt pulleys of the reference width system, in which the comprehensive inspection of the groove cross section replaces the original inspection of the groove angle and groove depth and the inspection of the height above the reference width; the circular runout inspection of the wheel groove working surface and the outer edge of the pulley is added to replace the inspection of the reference circle coaxiality; the inspection of the groove spacing and the reference diameter is retained, and the inspection method is improved
The groove shape inspection method of ordinary and narrow V-belt pulleys of the effective width system can be found in GB11356.2--1997 "Groove shape inspection of ordinary and narrow V-belt transmission pulleys (effective width system)". This standard shall replace the part on the inspection of the groove shape of ordinary V-belt pulleys in GB11356-89 from the date of implementation on July 1, 1998. Appendix A of this standard is the appendix of the standard. This standard was 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 and Shijiazhuang Sprocket General Factory. The main drafters of this standard are: Qin Shuan, Du Gang, Mao Lixin and Wu Guochuan. 184
GB/T11356.11997
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. Every 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 that have relations 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. The draft international standard adopted by the technical committee is 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.
International Standard ISO255 was drafted by SC1 V-Belts and Pulleys Technical Committee of ISO/TC41 Pulleys and Belts (including V-Belts).
This second edition cancels and replaces the first edition (ISO255:1981) and has been technically modified relative to the first edition. Appendix A of this international standard is an appendix to the standard. Appendix B of this international standard is for reference only. 185
1 Scope
National Standard of the People's Republic of China
Belt drives
Pulleys for classical and narrow V-belt drives
(system based on datum width)
Groove inspection
Belt drives-Pulleys for classical and narrow V-belts drives(system based on datum width)-Geometrical inspection of groovesThis standard specifies the conventional inspection method for the grooves of classical and narrow V-belt pulleys based on the datum width system. 2 Basic procedures
The inspection of pulleys shall be carried out according to the following four consecutive inspection procedures: a) Inspection of groove cross section (see Chapter 3);
b) Inspection of groove spacing (see Chapter 4);
c) Inspection of datum diameter (see Chapter 5); d) Inspection of circular runout (see Chapter 6).
3 Inspection of groove section
3.1 Dimensions of groove section
The specific dimensions of the groove section shall comply with the provisions of relevant standards. The inspection parameters are shown in Figure 1 and Table 1. Figure 1
Slot section dimensions
Reference width
Slot top height (above reference width)
Slot bottom depth (below reference width)
Approved by the State Bureau of Technical Supervision on December 30, 1997186
GB/T11356.1—1997
eqv IsO 255:1990
Replaced GB11356—1989
Specified value (no tolerance)
Minimum value
Minimum value
Implementation on July 1, 1998
3.2 Inspection
3.2.1 Limit gauge
GB/T11356.1—1997
The groove section shall be inspected with the limit gauge shown in Figure 2. Each standard angle of each groove section that meets the requirements of the standard should have a limit gauge. The limit gauge should be marked with the groove type and groove angle. Minimum
3.2.2 Inspection method
The "minimum" end of the limit gauge is used to check the minimum value of the groove angle. For groove angles that meet the requirements, the bottom angle of the gauge should be in contact with the side of the groove (see Figure 3) or evenly lean against the side of the groove.
The "maximum" end of the limit gauge is used to check the maximum value of the groove angle, the reference width, the groove top height h. and the groove bottom depth ht. If the top of the gauge at the width 6c is in contact with the side of the groove, and the gauge's If the platform is inside the straight side of the wheel groove (see Figure 4), the groove angle, reference width, groove top height h. and groove bottom depth h. are within the specifications. If only the corner of the "largest" end of the gauge contacts the groove, the groove angle is too large. Figure 3
If the platform of the gauge is above the straight side of the groove, the reference width or groove top height h. is too small (see Figure 5). If the gauge contacts the groove bottom and the corner of the gauge at the width ba does not contact the side of the groove, the groove depth is too large. Small (see Figure 6). 187
Inspection of groove spacing
4.1 Dimensional parameters
GB/T11356.1—1997
The following dimensions shall comply with the provisions of the relevant standards (see Figure 7). 4.1.1 Groove spacing
Nominal value e and tolerance of the distance between the center lines of two adjacent groove sections. Figure 7
4.1.2 Distance between the end face of the pulley and the center line of the first groove section Figure 6
For all single-groove or multi-groove pulleys, the distance between the end face of the pulley and the center line of the adjacent groove section shall be specified. For the convenience of pulley alignment, the positive and negative deviations of the f value may be specified. 4.2 Inspection
Inspect the groove spacing using the measuring device with replaceable measuring balls shown in Figure 8 (the corresponding measuring balls should be replaced for different groove types). The diameter of the measuring ball shall comply with the provisions of Article 5.1.
GB/T 11356.1—1997
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 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; ds——diameter of the measuring ball, mm. bZxz.net
5 Verification of reference diameter
5.1 Dimensional parameters
The following dimensions shall comply with the provisions of relevant standards. 5.1.1 Nominal value d of reference diameter and its tolerance. 5.1.2 Tolerance between reference diameters of each groove in a multi-groove pulley. 5.1.3 Diameter dB of the measuring ball or measuring rod and its tolerance, 5.1.4 Correction item 2x.
5.2 Verification
(1)
Put two measuring balls or measuring rods into the wheel groove to be measured (see Figure 9), 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 using a plane parallel measuring tool. The reference diameter is calculated using formula (2):
da = K - 2α
Where: 2α is the correction term.
6 Inspection of circular runout
The following tolerances shall comply with the provisions of the relevant standards. 6.1.1 External radial circular runout tolerance t, with the center line of the shaft hole as the datum A. (2)
6.1.2 Oblique circular runout tolerance t2t2 shall be measured at the datum diameter perpendicular to the working surface of the wheel groove. The datum consists of datum A and datum B (the pulley end face that matches the shaft shoulder end face).
6.2 Inspection
At the measuring position (see Figure 10), the radial and oblique circular runout during one rotation around datum A shall not be greater than the specified value. 189
GB/T 11356. 1—1997
GB/T 11356.11997
Appendix A
(Standard Appendix)
Measuring ball or measuring rod diameter dg and correction item 2x
Measuring ball or measuring rod diameter ds and correction item 2 are shown in Table A1. Table Al
B, SPB
Basic dimensions
Measuring ball or measuring rod diameter d
Limit deviation
Correction item
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