GB 8418-1987 Measurement method of dimensions of earth-moving machinery GB8418-1987 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Earth moving machinery-Methods of measuring the dimensions of earth moving machinery with tbelr equipment
This standard is equivalent to the international standard ISO7128-1983 "Ten-square machinery-1 Subject content and scope of applicationWww.bzxZ.net
UDC 621. B79: 5317
GB 8418-87
-Methods of measuring the dimensions of whole machines with working devices". This standard specifies the measurement methods of the whole machine dimensions of earth moving machinery. This standard applies to earth moving machinery. 2 References GB6572.1 Excavator Terminology Hydraulic GB 6572.2 Excavator Terminology Mechanical ZBJ83002 Loader Terminology JB1666 Test Method for Tractor Bulldozer 3 Terminology 3.1 Base Machine Machine without working device but with the necessary attachments for installing the working device. 3.2 Machine Wheel or crawler type earthmoving machine with corresponding working device specified by the manufacturer. 3.3 Equipment Equipment Working device installed on the base machine for a specific purpose. 3.4 Direct measurement Direct measurement Data is obtained by a measuring instrument. 3.5 Indirect measurement Data is obtained by a measuring instrument with the aid of some instruments (such as plumb line, level, etc.). 3.6 Complex measurement The measurement data is obtained by calculation after the data are measured by several measuring instruments. 3.7 Apparatus
The complete set of measuring tools and instruments required to determine the dimensions of a machine. 3.8 Ground reference plane The zero Z" plane on which the machine is measured. 4 Instruments and tools
Steel ruler, accurate to 1mm;
Approved by the State Machinery Industry Commission on December 7, 1987 and implemented on January 1, 1989
Steel ruler, accurate to 1mm:
Level,
Plumb plumb,
Anglometer, accurate to 1°
Straight rod,
Marking pen:
Theodolite.
5 Preparation before measurement
GB 841887
The machine to be measured should be cleaned and in an unloaded state, and equipped according to the manufacturer's technical specifications, with the specified machine mass. 5.1
5.2 The tire pressure should comply with the manufacturer's regulations, and the steering system (front and rear wheels) should be in the "straight ahead driving" position. 5.3 Articulated machines should be measured in a straight line. 5.4 The corresponding position of the working device should be recorded. 5.5 The bottom base plane (GRP) used for measurement is a horizontal concrete surface or a solid surface with sufficient area. The requirements for the bottom base plane (GRP) should comply with the provisions of Article 1.3.3.1 of JB1666. 5.6 The test pit for measuring the excavation depth should be of sufficient depth. 6 Measurement methods
6.1 Direct measurement method
6.1 The horizontal distance between each measuring point at the same height above the bottom reference plane (GRP) shall be measured with a ruler or a tape measure (as shown in Figure 1).
6.1.2 The vertical distance between each measuring point and the bottom reference plane (GRP) shall be measured with a steel ruler or a steel tape measure, and a plumb line shall be used to ensure that the steel ruler or steel tape measure is vertical (as shown in Figure 2).
6.1.3 The inclination angle of the inclined surface of the measured machine in the vertical plane shall be measured with a goniometer placed on the inclined surface (as shown in Figure 3). 6.2 Indirect measurement method
This method shall be used only when the direct measurement method is not feasible. 6.2.1 From each measuring point, a plumb line shall be dropped to obtain the corresponding vertical point on the bottom reference plane (GRP). The horizontal distance shall be measured between the vertical points on the bottom reference plane (GRP) (as shown in Figure 4). 6.2.2 Use a straight rod and a level to horizontally transfer each corresponding measuring point. Measure the vertical distance from the transferred measuring point to the bottom datum plane (GRP) with a ruler, and use a line to ensure that the steel ruler is vertical (as shown in Figure 5). 6.2.3 Measure the vertical distance from each measuring point below the bottom datum plane (GRP) to the bottom datum plane (GRP) in the test pit. A straight bar is placed on the bottom datum plane (GRP), and the second straight bar is horizontally close to the measuring point. The vertical distance between the two horizontal straight bars should be measured with a steel rod or a third straight rod should be used to record the vertical dimension between the two horizontal straight bars. Use a steel tape measure to measure the dimension marked on the third straight bar. During the test, use a plumb line to ensure that the steel ruler or the third straight bar is vertical, and use a level to ensure that the first and second straight bars are horizontal (as shown in Figure 6). 6.3 Composite measurement method
When the direct measurement method and the indirect measurement method cannot directly obtain the required data, calculate several measurement data to determine the difference [see Appendix A (reference)).
Steel spring only
GB8418—87
7 Measurement report
Measurement point
Line level
Level
GB 8418
After the measurement, a measurement report should be submitted. The horizontal distance and vertical distance in the measurement report should be accurate to 1 Ⅱm, and the angle should be accurate to 1°. The corresponding position of the working device should be noted in the measurement report. The measurement report should include the following contents:
Name, model and number of the machine being measured:
Name of the manufacturer of the machine being measured. Year and month of manufacture; measurement time, place, name of the tester; measurement results.
GB8418-87
Appendix A
(reference)
A1 When it is difficult to directly measure the horizontal distance L (as shown in Figure A1), it can be calculated according to formula (A1) based on several measured data: L - 1/2(A + BC)
. Residual point
Additional note:
This standard is drafted by Tianjin Engineering Machinery Research Institute. -(A1)
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