JB/T 9879-1999 Determination of oil mist concentration in metal cutting machine tools

JB/T 9879-1999 This standard is a revision of ZB J50 009-89 "Method for measuring oil mist concentration in metal cutting machine tools". During the revision, only editorial changes were made according to relevant regulations, and the main technical content remained unchanged. This standard specifies the method for measuring the oil mist concentration generated by metal cutting machine tools during operation. This standard is applicable to metal cutting machine tools. This standard was first issued in March 1989. JB/T 9879-1999 Determination of oil mist concentration in metal cutting machine tools JB/T9879-1999 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
.JB/T9879--1999
Metal Cutting Machine Tools
Oil Mist Concentration Measurement Method
Published on 1999-05-20
National Machinery Industry Bureau
2000-01-01Implementation
TE/T9879-1999
This standard is a revision of ZBJ5000989 "Method for Measuring Oil Mist Concentration in Metal Cutting Machine Tools". The original version was formulated with reference to relevant standards, through experimental research, and in combination with the use characteristics of machine tool products. Its technical content can still meet the current scientific and technological level and meet the needs of production and use.
This standard is consistent with the technical content of J509-89, and is only revised according to relevant regulations. This standard will replace ZBJ50009.-89 from the date of implementation. Appendix A and Appendix B of this standard are appendices of the specification. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The drafting units of this standard are: Shanghai Grinding Machine Research Institute, Anchuan Machine Tool Co., Ltd., Hanting Machine Tool Co., Ltd., and Shanghai First Machine Tool Co., Ltd. This standard was first issued in March 1999. Scope
Mechanical Industry Standards of the People's Republic of China
Metal Cutting Machine Tools
Oil Mist Concentration Measurement Method
This standard specifies the measurement method of the oil mist concentration generated by metal cutting machine tools during operation. This standard is applicable to metal cutting machine tools.
2 Measurement Principle
JB/T9879-1999
Replacement ZB I50 K)—9
Through the sampling hood, a certain volume of oil-containing air is passed through a membrane with a known carrying capacity to sample the oil. The increment of the hood after sampling and the volume of sampled air before reading the membrane can be calculated and the weight of the oil mist in the air per unit volume can be calculated. 3 Instruments
The measurement of oil concentration in metal cutting machine tools requires the use of the following measuring instruments and equipment: sampling device (sampling head, sampling center, sampling power, flow meter and support frame, etc.): analytical balance (quantity 0 , 10 enough;
Synthetic fiber filter membrane:
Sand table;
Flat ball temperature light: wwW.bzxz.Net
Empty plate air sticking table:
4-General requirements
4.1, when measuring the oil separation of machine tools, a background test should be conducted before the machine tool is operated to determine the environmental fog and air humidity. 4.2 When sampling, the surrounding windows and ventilation equipment should be closed. 4.3 When collecting machine tool oil, other machine parts that produce oil mist should be The machine should stop working. 4.4 When sampling, the cooling system of the machine tool and other systems that generate oil should be operated at the maximum flow rate, and sampling should be carried out after the machine tool has been running for 30 minutes. When the machine tool is not running, the machine tool should be in operation. 4.5 The sampling head should have two filter membranes, which should be placed in a place where workers often operate, and the distance from the machine tool should not exceed II. The sampling head ... The time of sampling and the time from the end of sampling to the sample weighing should not exceed 20m in general. 4. When there are several operating positions on the machine tool, each operating position should be measured, and the largest value should be taken as the oil limit of the machine. 4. The ambient temperature and air pressure should be measured before and after sampling. 5.1 Preparation of filter membrane
Approved by the State Administration of Machinery Industry on May 20, 1999, and implemented on January 1, 2000
TB/T 9879—1999
3,1.1 Number the weighed membranes and weigh them on an analytical balance (should be accurate to 1 μm). Method: The purpose of weighing is to make the membranes dry and stable. The method is to place the membranes in a dry place for 24 hours and weigh them once every hour. Repeat the weighing twice until the difference in volume does not exceed 0.20 μm
5.7.2 Place the weighed membranes in a membrane box and prepare them for use in the laboratory. 5.2 Sampling
5.2.1 Install the filter membrane on the sampling device.
5.2.2 During sampling, draw air to a stream and take 15~40min. 5.2.3 The weight of the sample should be within the range of 1~1mg. 5.2.4 After sampling, cut off the power supply and close the sampling pipeline. The oil particles are drawn out by the ten negative electrodes at the same time, and then the membrane is taken out. 6 Calculation of results
6.1 Weigh the filter membrane after sampling (accurate to 0.10mg) 16.2 Calculation of concentration
6.2! The oil mist concentration is calculated according to the above formula NN,-N2
N,=1000 (mt-, ] /F
Main concentration of machine tool oil, mg/m:
2734#101324.72
V=g,7-
Actually measured oil mist density, n1g/ml: Oil mist density of background test [including absolute air humidity], mm-filter membrane weight after sampling, mg
Black sample front membrane volume, of;
Sampling air volume in a standard push state [0%, 101324.72Pa (760mmHg) atmospheric pressure], above: Actual incoming sample volume, L;
Air pump during sampling, Limi;
Sampling time ，m切：
Environmental shock when sampling, 死;
Atmospheric pressure when sampling: Pa (When the atmospheric pressure unit is mmHg when sampling, 巧.-巧()
-（3)
...(4)
273×黑%
273+760
6.7.1 When the difference in oil concentration between two parallel samples exceeds 20% of their average position, the oil concentration at the sampling point is taken as the effective sample. The average value of the oil concentration of the two parallel samples is used as the sample. Note: Parallel samples refer to the left and right samples of the same sample. 2
A! Selection of sampling device and filter
JB/T9879—1999
(Appendix of the suggestion)
Selection of sampling device, filter membrane and
Maximum value of oil mist concentration in metal cutting machine tools. The sampling device is recommended to use the Anfang D-type dust sampler (produced by Shenyang Instrument Factory). The filter membrane suitable for this pillow is a synthetic filter membrane with a diameter of 40mm (produced by Beijing Synthetic Fiber Factory). A1 In order to ensure the health of people, the maximum value of the oil mist concentration in metal cutting machine tools should not exceed 5mm, and the filter
machine tool name should be changed
to the name of the filter
iGuangzhou
Kuanbing brand number specification
Measurement position check
Measurement (gold):
JB/T9879-1999
Appendix B
(recommended record)
Metal cutting machine oil mist measurement record
Processing number and specification
Small number
Grinding wheel processing
Workpiece processing
Loading material
Measurement instrument
Name and model
Payment date
Real data record
"eihin
Golden date:
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