This standard specifies the geometric accuracy, tolerance and inspection method of bottom drive tensile presses. JB/T 8348.1-1996 Bottom drive double action tensile press accuracy JB/T8348.1-1996 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T 8348. t-96
Bottom-drive double-acting drawing press
1996-14-11 Issued
Ministry of Machinery Industry of the People's Republic of China
1996-100 Implementation
Machinery Industry Standard of the People's Republic of China
Precision of bottom-drive double-acting drawing press
1 Subject content and scope of application
JB/T8348.10G
1620187
This standard does not specify the general purpose and test methods of double-acting drawing presses (hereinafter referred to as presses). This standard is suitable for other purposes.
2 Reference Standards
10923 General Rules for Degree Inspection
3 Notes
31 Before the test, the pressure machine should be properly installed. The vertical center of the press machine should be placed on the flat surface. The length of the flat plate should not exceed 0.2/1033.2 The flat surface of the press machine is used for the inspection of the degree of heat. 3.31 What is the length of the surface that is qualified for measurement? The length that is not tested is: 13e
When L IccCma:! , = 0. 1. When 1nnoram 3.4 is the actual standard movement measurement of one time (=--2 is the maximum actual detection length of the positive edge block surface (-.):, is the actual detection length of the measuring block stroke: 1 is the actual detection length of the Leda clot under the level of the volume = 1:1 is the actual detection length when the volume can be adjusted:, is the actual detection length of the six-way level. 3.5 This article is about the precision inspection sequence, and does not show the actual inspection sequence. In order to install the soldiers and the initial inspection method, the inspection can be carried out according to the general sequence.
3.6 The information of the inspection item should be supplemented with the difference, and the actual inspection main degree should be calculated according to the formula. The number is smaller than 5m, measured in m; greater than 1un., measured in 13m.
Approved by the Ministry of Machinery Industry on 199-14-11
19961001 Implement
Geometric accuracy inspection
Pull the project on the work table
And the flat
Le reverse slider
And the
Inspection engineer
The rear block
Can be based on
, etc., to generate
Xie Qiu's decision
Zhang Ping only
Indicator
Refer to GR 1G923 related documents
When there is a hole in the geometric center of the workbench, two points a, b, c, and c should be used as reference points on the plane to be inspected (see figure). Place the measured pieces at these three points, and use a piece of equal thickness or half of the piece on the surface of the block as the inspection reference for comparison with the plane to be inspected. First, place the ruler on the surface of the workbench at point 2, and then measure the piece at point 1, so that it contacts the lower surface of the ruler. Place an adjustable measuring block on the top of the block. Then place the ruler on the h and f points, and adjust the measuring block to make it contact with the lower part of the ruler. Place the ruler on the d and tt points, and adjust the measuring block to make it contact with the lower part of the ruler. Place the ruler on the same square, and the difference between each point on the particle can be measured. The maximum algebraic difference is calculated as 5. 3. 2. 3
Use the straight line obtained by moving the ruler to test. Use the equal height support ruler to measure the points a, b and d separately - adjustable measuring blocks! Use the
method to support the original measuring block,
ruler and adjust it to be parallel, two support rulers 1 special surface, and then put the light test flat on the support ruler, connect the front and rear force to the ruler and the grid to show the piano. And measure the distance between the "lower flat river and the dangerous half and the flash.
The error in the middle and front is measured by the difference in the maximum reading of the indicator. It is allowed to be carried out before assembly according to the inspection items: the tensile fine block, the stroke of the workbench, the verticality of the surface, the nominal 500-2500k, the nominal 2500k, the pusher, and the GB 1n923 related provisions
6. 5. 2. 2. 1wwW.bzxz.Net
Put the workbench on the cam pressure sheet, put a flat ruler on the workbench, and change a second ruler on the flat ruler. Tighten the lower half of the indicator and put the measuring head on the inspection value of the ruler. Measure when the ridge is moving downward. On the straight line through the center of the workbench to the longitudinal direction.
Differential indicator large reading difference meter
J/T8348.1
9161809
Test items
When the main rod is adjusted downward
Vertical degree of the workbench surface
Nominal force 50ukN
Nominal force 500~250k
.1℃+5.0
Nominal force>2500kN
Inspection tools
Each according to G 1072 Section 5.5.2.2.1 Make the pulley in the most appropriate position, the workbench in the west, a flat ruler on the workbench, an angle ruler on the ruler, and the indicator on the lower half of the main rod, so that the indicator head is on the angle ruler for inspection. When the soil is pressed downward, the horizontal and vertical directions of the center of the workbench can be measured. The error is the maximum value left by the indicator. J9/T 8348.1-96 "The instrument should be used as follows: 2391900 N3008-00S-7k7
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