Quality is degree of Goodness.
Thursday 31 May 2018
NISSAN GTR
| Nissan GT-R (R35) | |
|---|---|
Nissan GT-R
| |
| Overview | |
| Manufacturer | Nissan Motor Company |
| Production | December 2007 – present |
| Assembly | Kaminokawa, Tochigi, Japan[1] |
| Designer | Exterior: Hirohisa Ono Interior: Akira Nishimura Chief Designer: Hiroshi Hasegawa Design Director: Shiro Nakamura |
| Body and chassis | |
| Class | Sports car (S) |
| Body style | 2-door 2+2 coupé |
| Layout | F4 layout |
| Platform | Premium Midship |
| Powertrain | |
| Engine | 3.8 L VR38DETT twin-turbo V6 |
| Power output |
|
| Transmission | 6-speed dual clutch automatic |
| Dimensions | |
| Wheelbase | 2,780 mm (109.4 in) |
| Length |
|
| Width |
|
| Height |
|
| Curb weight | 1,740 kg (3,840 lb) |
| Chronology | |
| Predecessor | Nissan Skyline GT-R |
The Nissan GT-R is a 2-door 2+2 high performance vehicle produced by Nissan unveiled in 2007.[2][3][4] It is the successor to the Nissan Skyline GT-R although no longer part of the Skyline range itself, the name having been given over to the R35 Series and having since left its racing roots.
Contents
Specifications[edit]
The Nissan GT-R is powered by the VR38DETT V6 engine, a 3,799 cc (3.8 L; 231.8 cu in) DOHC V6 with plasma transferred wire arcsprayed cylinder bores.[17] Two parallel Ishikawajima-Harima Heavy Industries (IHI) turbochargers provide forced induction.[18] Models manufactured between 2007 and 2010 produce a manufacturer-claimed engine output of 485 PS (357 kW; 478 hp) at 6400 rpm and 434 lb⋅ft (588 N⋅m) at 3200–5200 rpm.[19] The engine also meets California Air Resources Board Ultra Low Emission Vehicle (ULEV) standards.[20] A curb weight of 1,730 or 1,736 kg (3,814 or 3,827 lb) with side curtain airbags is achieved using a jig welded steel chassis with aluminum used for the hood, trunk, and doors.[21] A rear mounted six-speed BorgWarner designed dual clutch semi-automatic transmission built by Aichi Machine Industry[22] is used in conjunction with the ATTESA E-TS system to provide power to all four wheels and along with Nissan's Vehicle Dynamics Control (VDC-R) to aid in stability. Three shift modes can also be selected for various conditions.[23]Beginning in 2010, engine power and torque were upgraded to 390 kW (530 PS; 523 hp) at 6400 rpm and 612 N⋅m (451 lbf⋅ft) at 3200–6000 rpm respectively. Models produced in 2012 again featured improved engine output (406.5 kW (553 PS; 545 hp) at 6400 rpm and 628 N⋅m (463 lbf⋅ft) at 3200–5800 rpm). The next-generation GTR is expected to be a hybrid, powered by a combination of the GT-R LM Nismo derived 3.0 liter V6 and a battery/motor system
Sunday 27 May 2018
2D Height Gauge
2D HEOGHT GAUGE
2D height gauge is a electronic height gauge,which is used to check linear dimension.Its working is like a normal height gauge but it has programming,so it can calculate or add and subract the probe constant automatically which is feed in its programming.
All 2D height gauge have different dia of probe.So you cant used the probe of another 2D height gauge to other.
If you used the another 2D height Gauge probe then you must have to set the probe constant in height gauge of that probe.
You can check internal lengths,outer lengths etc.
Available ranges: 0 to 300mm,0 to 600mm, 0 to 1000mm
Least counts: 0.001mm,0.0001mm,
2D height gauge is a electronic height gauge,which is used to check linear dimension.Its working is like a normal height gauge but it has programming,so it can calculate or add and subract the probe constant automatically which is feed in its programming.
All 2D height gauge have different dia of probe.So you cant used the probe of another 2D height gauge to other.
If you used the another 2D height Gauge probe then you must have to set the probe constant in height gauge of that probe.
You can check internal lengths,outer lengths etc.
Available ranges: 0 to 300mm,0 to 600mm, 0 to 1000mm
Least counts: 0.001mm,0.0001mm,
OPTICAL FLATS
OPTICAL FLATS
An optical flat is an optical-grade piece of glass lapped and polished to be extremely flat on one or both sides, usually within a few tens of nanometres (billionths of a meter). They are used with a monochromatic light to determine the flatness (surface accuracy) of other surfaces, whether optical, metallic, ceramic, or otherwise, by interference.[1] When an optical flat is placed on another surface and illuminated, the light waves reflect off both the bottom surface of the flat and the surface it is resting on. This causes a phenomenon similar to thin-film interference. The reflected waves interfere, creating a pattern of interference fringes visible as light and dark bands. The spacing between the fringes is smaller where the gap is changing more rapidly, indicating a departure from flatness in one of the two surfaces. This is comparable to the contour lines one would find on a map. A flat surface is indicated by a pattern of straight, parallel fringes with equal spacing, while other patterns indicate uneven surfaces. Two adjacent fringes indicate a difference in elevation of one-half wavelength of the light used, so by counting the fringes, differences in elevation of the surface can be measured to better than one micrometre.
Usually only one of the two surfaces of an optical flat is made flat to the specified tolerance, and this surface is indicated by an arrow on the edge of the glass.
Optical flats are sometimes given an optical coating and used as precision mirrors or optical windows for special purposes, such as in a Fabry–Pérot interferometer or laser cavity. Optical flats have uses in spectrophotometry as well.
NOTE: ONE FRINGE = 0.32um
So number of red fringes obtained with optical flat stable on surface multiply by 0.32um.
this procedure is used without monochromatic light.
Optical parallel flat set is used to find out paralleliesm betweeen two surfaces.
Like micrometers,depth micrometers,dial calibration tester etc.
SLIP GAGUE SET AND LONG SLIP GAUGE SET
SLIP GAUGE SET:
Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths. The individual gauge block is a metal or ceramic block that has been precision ground and lapped to a specific thickness. Gauge blocks come in sets of blocks with a range of standard lengths. In use, the blocks are stacked to make up a desired length.
An important feature of gauge blocks is that they can be joined together with very little dimensional uncertainty. The blocks are joined by a sliding process called wringing, which causes their ultra-flat surfaces to cling together. A small number of gauge blocks can be used to create accurate lengths within a wide range. By using 3 blocks from a set of 30 blocks, one may create any of the 1000 lengths from 3.000 to 3.999 mm in 0.001 mm steps (or .3000 to .3999 inches in 0.0001 inch steps). Gauge blocks were invented in 1896 by Swedish machinist Carl Edvard Johansson.[1] They are used as a reference for the calibration of measuring equipment used in machine shops, such as micrometers, sine bars, calipers, and dial indicators (when used in an inspection role). Gauge blocks are the main means of length standardization used by industry.
Wringing
- Air pressure applies pressure between the blocks because the air is squeezed out of the joint.
- Surface tension from oil and water vapor that is present between the blocks.
- Molecular attraction occurs when two very flat surfaces are brought into contact. This force causes gauge blocks to adhere even without surface lubricants, and in a vacuum.
Thursday 10 May 2018
Gauge Block Calibrator/Comparator
IS: 2984:2003
The gage block is a time-tested metrology tool that helps to prevent crucial production errors, scrapped parts, and product reworking, and these highly reliable tools require regular dimensional calibration services to ensure accuracy. At Transcat, our gage block calibration services cover gage blocks that contribute to manufacturing productivity, tool-making, and parts inspections. Our scientifically advanced North American calibration laboratories and metrology experts calibrate the blocks that take measurements in the factory or the laboratory. Within our reference-level laboratories, we also service master gage block sets. You can take advantage of Transcat’s extensive gage block expertise whether you are using a block to confirm the dimensions of a small part or check micrometer performance.
REQUIRED LEAST COUNT FOR GAUGE BLOCK TO CHECK SLIP BOX IS 0.01um.
And its range depend upon the manufacturer.
Usage:
It used only to calibrate Grade 0,1,2 Slip Gauge Box.
Notte: Slip Gauge Block with Grade K is not calibrated with Gauge Block Calibrator.
According to NABL Laser Interferometer is MUst to calibrate k Grade boxes.
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