Manufacturing of slip gauges pdf

To produce an assembly of required dimensions, begin with the smallest increment of size and subtract this from the required dimension. Eliminate the next smallest number in the same way, and repeat this procedure until the assembly is complete.

This process will give the minimum number of gauge blocks necessary to build up the given dimension. The accuracy of gauge blokes is affected by temperature changes. Their accuracy should be checked time-to-time against any warn out or deformation in the blocks. To do so, in industries, a set of gauge blocks are available as a reference set, to check the other working sets.

Material Most of the slip gauges are produced from high grade steel, hardened and stabilized by heat treatment process to give a high degree of dimensional stability. Slip gauges can be made from tool steel, chrome plate steel. Stainless steel, chrome carbide, tungsten carbide etc. Tungsten carbide is an extremely hard, wear resistant, and most expensive material than steel. Sometimes chrome plating is also used to improves the corrosion resistance.

Addition of chrome plates leads to the tendency of Flake-off, especially at the edges. Hence they are disliked by experienced workers. Then they are subjected to a cyclic low temperature heat treatment, to provide stability of dimensions and to relieve the internal stress. A batch of 8 blanks of similar nominal size is mounted on eight Co-planner Faces of a magnetic chuck.

Now, the required Parallelism and equality of size is achieved by interchanging four of the eight gauges as shown in figure 1. They are interchanged diagonally and turned end for end.

Thus any errors in Parallelism are equalized. Now, to determine whether the gauges are the required size they are removed from the chuck, wrong together in combination, and their aggregate size compared with an appropriate size master in a suitable comparator.

A magnification of 8 is obtained in this calibration since, as each of the 8 gauges must be identical in size, the difference between combination and master may be divided by eight and this difference is distributed to each gauge. If necessary, individual block can be mounted on chuck to bring their individual lengths within required accuracy. Since the initial cost of slip gauges in high, so to maintain their accuracy, they require great care.

When not in use, the slip gauges should be kept in their respective positions in the gauge box. Gauges should not be wrong together over an open gauge box, due to the possibility of accidently drop of any gauge on several gauges placed in the box and could be damaged. After use, a thin layer of good quality grease should be applied on their faces, before they are kept in their case.

As far as possible, slip gauges should be used in air-conditioned rooms, free from dust and maintained constant temperature. Limits, Fits and Tolerances Metrology. We use cookies We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. You consent to our cookies if you continue to use our website. Cookie Settings Accept. Manage consent. Now, the required Parallelism and equality of size is achieved by interchanging four of the eight gauges as shown in figure 1.

They are interchanged diagonally and turned end for end. Thus any errors in Parallelism are equalized. Now, to determine whether the gauges are the required size they are removed from the chuck, wrong together in combination, and their aggregate size compared with an appropriate size master in a suitable comparator.

A magnification of 8 is obtained in this calibration since, as each of the 8 gauges must be identical in size, the difference between combination and master may be divided by eight and this difference is distributed to each gauge. If necessary, individual block can be mounted on chuck to bring their individual lengths within required accuracy.

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Table of Contents. Gauges are mainly utilized by engineers in order to segregate the appropriate dimension of a workpiece. Therefore, if the Gauge seemed accurate in relation to ideal Gauge then the workpiece should be measured with that Gauge. The operator can use Gauge without having vast knowledge in operating those mechanical components.

Also, Gauges consume less time as compared to other measuring devices. Plain Gauge is defined as the dimension measuring or inspective tools, without a scale to measure any manufacturing part of tools. Plain Gauge is classified into four different types. Those types are in follows:. Standard Gauge can be defined as the measuring tool that checks the copy of the mating part of the material.

This gauge cannot be used by an engineer due to the existence of tolerance in a workpiece. Limit Gauge is defined as the gauge that is used to measure a component by two limits, one is High and another is Low. So, there are two gauges to measure the dimension of the material. The part of the component has to pass through the Go-Gauge and for the Not-Go-Gauge, it has not to pass. This gauge is widely used in industries. Indicating Gauge is defined as the gauge which is used to measure a part of a material and shows the measurement on a display.

This gauge displays the measurement on the indicator or display, so it is termed as the Indicating Gauge. This gauge is complex than other gauges. The best example of the Indicating Gauge is Dial Gauge. Nowadays such indicating gauge has a system of the visual display. Combination Gauge is defined as the gauge which can take more than one dimension of the parts of the material consecutively. It is very useful as at a time more than one measurement of the parts can be taken.

It consumes less time and produces more efficient results. Workshop Gauge is defined as the gauge which is used to measure the parts of the material at the time of production.

This gauge is used in the production time at the workshop so that this gauge is named as the Workshop Gauge.

The Workshop gauge is designed like that, where the tolerance is in the center-line. So that Workshop Gauge is very useful in the plants or workshops rather than the others. Inspection Gauge is defined as the gauge which is used by the inspectors in the plants after finishing the manufacturing of the products to accept it. As the acceptance or the rejection is depending on the gauge measurement so that tolerance of this Inspection Gauge is slightly more than the Workshop Gauge.

If the tolerance of the material part is high then it is accepted otherwise the material should be rejected. Master Gauge is defined as the gauge to check the other gauges. As the expenditure is involved, the measuring instruments, optimizers, comparators, slip gauges, etc.

All the other gauges are checked by this gauge so that this gauge is called the Master Gauge. It is very useful because the efficiency of the other gauges depends on the master gauge. If the master gauge cannot check the other gauges or instruments properly then those gauges and instruments cannot give accurate results.

Dimension Measuring Gauge is defined as the gauge which measures very small parameters of the parts of the material with very high accuracy.