The gauge block handbook Episode 11 doc

... the calibrated block is given by: L u = M u - M s + L s + (α s - α u ) (D.6) where L u is the calibrated length of the unknown block, M u is the measured value of the unknown block, ... steel master block to calibrate a chrome carbide block under the above conditions we see that the penetration correction for steel and chrome carbide blocks differ substant...

Ngày tải lên: 12/08/2014, 08:21

... light wavelength to the block length the accuracy of the wavelength is of primary importance. The gauge block temperature is measured so that the block length at 20 ºC, the standard 102 during ... Square style blocks, such as the NIST long blocks, are positioned so that the gauge point is at the right in the viewing field of the interferometer. One to fou...

Ngày tải lên: 12/08/2014, 08:21

... fixed gauge, and the required accuracy of the gauge is 0.5 µm. If the size of the gauge requires a stack of five blocks to make up the nominal size of the gauge the accuracy of each block must ... to the other end of the block, as shown in figure 2.1 (from B89.1.9). Figure 2.1. The length of a gauge block is the distance from the gauging point o...

Ngày tải lên: 12/08/2014, 08:21

... only the 30 to 60 mm of the block near the surfaces. For blocks under 100 mm this is the entire block, and there is no problem. For longer blocks, there is a variable amount of the block in the ... If there is a burr on the block or platen, if there is particle of dust between the block and platen, or if the block is seriously warped, the entire face of the...

Ngày tải lên: 12/08/2014, 08:21

... laboratory has a gauge block measured at NIST every year for nine years, it is good practice for the lab to use the mean of the nine measurements as the length of the block rather than the last reported ... between the length of gauge blocks previously corrected for temperature and the observed temperature of the block, then either the temperature is being measu...

Ngày tải lên: 12/08/2014, 08:21

... through to the gauge block surface G and the platen surface P. The other beam (reference beam) is directed through the compensating plate I to the plane mirror R. The beams are reflected by the surfaces ... σ tot , on gauge block length. 95 The optical path beyond the slit is inside a metal enclosure with a large door to allow a gauge block platen with gau...

Ngày tải lên: 12/08/2014, 08:21

... XY SX CX YS YC XS XY XC SC YX SY CS Y Y Y Y Y Y Y Y Y Y Y Y Y − − − − − − − − − − − − == 12 11 10 9 8 7 6 5 4 3 2 1 111 00 10101 1 0110 110 01 110 10 10101 110 10 1 0110 10 011 1110 0 110 01 10 011 −− −− −− −− −− −− −− −− −− −− −− − − =X (A.7) When the S block is the restraint ... often in the first part of the scheme. This allows block A to have a different the...

Ngày tải lên: 12/08/2014, 08:21

... 138 Step 1. The test and slave blocks are wrung down to the same platen and measured independently. The two lengths measured consist of the mechanical length of the block, the wringing film and the ... etc. If a check standard block is used it can be assigned to any of the unknown block positions. The name of the design is simply the number of blocks in the desig...

Ngày tải lên: 12/08/2014, 08:21

... alloys Die design Process control 111 Modification of the diecasting process 113 Applications of diecastings 114 The diecasting foundry 114 Die coating 116 10 Low pressure and gravity diecasting ... Foundryman’s Handbook forces exist from the momentum of the metal as it fills the mould and from forces transmitted to the cope via the core prints as the cores in cor...

Ngày tải lên: 13/02/2014, 16:20

... fixed gauge, and the required accuracy of the gauge is 0.5 µm. If the size of the gauge requires a stack of five blocks to make up the nominal size of the gauge the accuracy of each block must ... to the other end of the block, as shown in figure 2.1 (from B89.1.9). Figure 2.1. The length of a gauge block is the distance from the gauging point o...

Ngày tải lên: 20/06/2014, 18:20