Which gauge is used during use of sine bar?
Which gauge is used during use of sine bar?
slip gauge blocks
A sine bar is used in conjunction with slip gauge blocks for precise angular measurement. A sine bar is used either to measure an angle very accurately or face locate any work to a given angle offering a high degree of accuracy in measuring angles for milling, grinding and inspection applications.
Is sine bar better than Angle gauges?
Explanation: Angle gauges are more accurate than sine bar as it involves trigonometric functions. 2. How 34′ can be built by using angle gauges?
How does sine bar work?
Working Principle of Sine Bar: The principle of operation of the sine bar is based on the law of trigonometry. If one roller of sine bar is placed on the surface plate and the other roller is placed on the height of slip gauges, then the structure formed by the sine bar, surface plate, and slip gauges forms a triangle.
Why do sine bars have holes?
Holes are produced in the sine bar for reducing the weight of the sine bar so that handling of the sine bar will become easier. Only sine bar can’t be used for measurement of angles of a component, but the sine bar is always used in association with slip gauges or Height Gauge for measurement of the angles.
How is slip gauge calculated?
The height of the slip gauge block is found by multiplying the sine of the desired angle by the length of the sine bar: H = L * sin(θ). For example, to find the gauge block height for a 13˚ angle with a 5.000″ sine bar, multiply the sin(13˚) by 5.000″: H = 5.000″ * sin(13˚).
What is limitation of sine bar?
Following are the limitations of sine bar: Any unknown projections present in the component will cause errors in the measured angle to be induced. For the construction of slip gauges, there is no scientific approach available and it has to be built on trial and error basis and it is a time-consuming process.
What is the least count of sine bar?
Answer: Accuracy up to 0.01mm/m of length of the sine bar can be obtained.
What are the limitations of sine bar?
Following are the limitations of sine bar:
- Any unknown projections present in the component will cause errors in the measured angle to be induced.
- For the construction of slip gauges, there is no scientific approach available and it has to be built on trial and error basis and it is a time-consuming process.
What are the advantages of sine bar?
A sine bar is used in conjunction with slip gauge blocks for precise angular measurement. A sine bar is used either to measure an angle very accurately or face locate any work to a given angle. Sine bars are made from a high chromium corrosion resistant steel, and is hardened, precision ground, and stabilized.
What is least count of sine bar?
What is the purpose of slip gauge?
Meaning and Need of Slip Gauges: Slip gauges are the universally accepted ‘standard of length’ in industries. These are the simplest possible means of measuring linear dimensions very accurately.
What is wringing of slip gauges?
Wringing of Slip Gauge: If two slip gauges are forced against each other on measuring faces, because of contact pressure, gauges stick together and considerable force is required to separate these blocks. This is known as wringing of slip gauges. Slip gauges are wrung together by hand and no other external means.
How do you set the sine bar on a slip gauge?
Always use a perfectly flat and clean surface plate. Place one roller on the surface plate and the other roller on the slip gauge block stack of height H. Let the sine bar be set to an angle ϴ. Then sin (ϴ) = H/L, where L is the distance between the center.
How are the plugs attached to a sine bar?
Sine bars are available in different forms and sizes, according to the purpose of its use and method of application. In design (a), the plugs project about 12 mm from the front face of the bar and in design (b) and (c), the ends of the bar are stepped and the plugs are secured into each step by screw.
How is the angle of a sine bar checked?
Where, h = height made by slip gauge. L = distance a between the centres of rollers. For checking the angle of small size components, a sine bar is set up approximate (Nominal) angle on a surface plate by suitable combination of slip gauges. The component being checked is placed over the surface of a sine bar as shown in Fig. 1.23.
What is the purpose of a sine bar?
The difference of the two height gauge reading being the rise of the sine-bar as shown in fig 1.24. A sine bar has to be used in conjunction with a surface plate and slip gauges. Sine bar is used for checking angle of components, taper of work pieces, etc. It is also used for setting a work to a known required angle.