ISO 229:1973 工作機械—速度と送り | ページ 2

3.1 定義

この国際規格の目的のために、次の定義が適用されます。

4.1 定義

この国際規格の目的のために、次の定義が適用されます。

FOREWORD

ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO Member Bodies). The work of developing International Standards is carried out through ISO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the ISO Council.

Prior to 1972, the results of the work of the Technical Committees were published as ISO Recommendations; these documents are now in the process of being transformed into International Standards. As part of this process, Technical Committee ISO/TC 39 has reviewed ISO Recommendation R 229 and found it suitable for transformation. International Standard ISO 229 therefore replaces ISO Recommendation R 229-1961.

ISO Recommendation R 229 was approved by the Member Bodies of the following countries:

The Member Bodies of the following countries expressed disapproval of the Recommendation on technical grounds:

Netherlands

U.S.A.*

The Member Body of the following country disapproved the transformation of ISO/R 229 into an International Standard:

United Kingdom

1 SCOPE AND FIELD OF APPLICATION

This International Standard specifies the speeds (number of revolutions or strokes per minute) and the feeds (in millimetres or in inches, per minute, per revolution, or per stroke) of machine tools working by removal of metal and driven directly by an electrical motor.

It is not applicable, for obvious technical reasons, to machines with continuous speed variations, feeds for thread forming, etc.

3 SPEEDS

3.2 Basic values

The complete range of basic values for the speeds of a machine tool shall include only values taken from the R 20 series of preferred numbers, as shown in column 1 of table 2, or from their decimal multiples or submultiples.

Provided that this condition is satisfied, the scaling is left free and the values may be chosen so as to meet the requirements of the machine tool.

3.3 Tolerances

The actual values of the speeds, checked as indicated above, shall lie within the limits of the total tolerance.

.

It is the sum of

an electrical tolerance of and

Table 2 gives:

• columns 2 and 3: the limits of the actual values, corresponding to the prescribed tolerance (total tolerance): electrical + mechanical;
• columns 4 and 5: the limits for calculating the mechanical tolerance.

TABLE 2 — Speeds: number of revolutions or strokes per minute

Basic value R 20	Limits corresponding to the total tolerance: electrical + mechanical		Limits for calculating the mechanical tolerance 1)
	min.	max.	min.	max.
1	2	3	4	5
100	98	106	98	103
112	110	119	110	116
125	123	133	123	130
140	138	150	138	145
16 0	155	168	155	163
180	174	188	174	183
200	196	212	196	206
224	219	237	219	231
250	246	266	246	259
280	276	299	276	290
315	310	335	310	326
355	348	376	348	365
400	390	422	390	410
450	438	473	438	460
500	491	531	491	516
560	551	596	551	579
630	618	669	618	650
710	694	750	694	729
800	778	842	778	818
900	873	945	873	918
1 000	980	1 060	980	1 030

To extend the table upwards or downwards, divide or multiply the given values by 10 or a power of 10.

4 FEEDS

4.2 Basic values

The complete range of basic values for the feeds of a machine tool shall include only values taken from the R 20 series of preferred numbers, as shown in column 1 of table 3, or their decimal multiples or submultiples.

Provided that this condition is satisfied, the scaling is left free and the values may be chosen so as to meet the requirements of the machine tool.

4.3 Tolerances on the feed per minute (driven independently of the spindle)

The actual value of the feed per minute, checked as indicated above, shall lie within the limits of the total tolerance.

It is the sum of

• a mechanical tolerance equal about to:

Table 3 gives, in millimetres, and table 4 in inches,

• columns 2 and 3: the limits of the actual values, corresponding to the tolerance specified (total tolerance: electrical + mechanical),
• columns 4 and 5: the limits for calculating the mechanical tolerance of the feed per minute (coinciding with the limits of the actual values corresponding to the tolerance specified below for the feed per revolution (or per stroke)).

4.4 Tolerances on the feed per revolution (or per stroke)

The actual value on the feed per revolution (or per stroke) shall lie within the minimum and maximum limits shown in columns 4 and 5 of table 3, for millimetres, and of table 4, for inches, which correspond only to the mechanical tolerance of the gearbox, since the feed per revolution (or per stroke) is independent of the motor.

TABLE 3 — Feeds in millimetres

Basic value
	Basic value R 20	Feeds per minute 1)		Feeds per revolution (or per stroke) 2)
		Limits of the toleranceapproximately		Limits of the toleranceapproximately
min.		max.	min.	max.
1	2	3	4	5
0.040	0.038 6	0.041 7	0.038 6	0.040 6
0.045	0.043 3	0.046 9	0.043 3	0.045 7
0.050	0.048 4	0.052 4	0.048 4	0.051 2
0.056	0.054 3	0.059 1	0.054 3	0.057 1
0.063	0.061 0	0.066 1	0.061 0	0.064 2
0.071	0.068 5	0.074 0	0.068 5	0.072 1
0.080	0.077 2	0.083 5	0.077 2	0.081 1
0.090	0.086 2	0.093 3	0.086 2	0.090 9
0.100	0.097	0.105	0.097	0.102
0.112	0.109	0.118	0.109	0.115
0.125	0.122	0.132	0.122	0.128
0.140	0.137	0.148	0.137	0.144
0.160	0.154	0.166	0.154	0.162
0.180	0.172	0.186	0.172	0.181
0.200	0.193	0.209	0.193	0.203
0.224	0.217	0.235	0.217	0.228
0.250	0.243	0.263	0.243	0.256
0.280	0.273	0.295	0.273	0.287
0.315	0.306	0.331	0.306	0.322
0.355	0.344	0.372	0.344	0.362
0.400	0.388	0.417	0.386	0.406

To extend the table downwards or upwards, divide or multiply the given values by 10 or a power of 10.