SYED ALISAN HOSSAIN DME50344444444444444444.pptx

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1. Name- Syed Alisan Hossain Student code- BWU/DME/21/020 Department - Mechanical Engineering Subject- Metrology and Quality Control Subject code- DM E503 Semester- 5th SINE BAR AND SLIP GAUGE

2. OUTLINE Introduction Construction of Sine bar Working Principle of Sine bar Advantages and disadvantages of Sine bar Applications of Sine bar

3. INTRODUCTION A sine bar consists of a hardened, precision ground body with two precision ground cylinders fixed at the ends. The distance between the centers of the cylinders is precisely controlled, and the top of the bar is parallel to a line through the centers of the two rollers.

4. INTRODUCTION Slip gauges are the universally accepted 'standard of length' in the manufacturing and engineering industries. Gauge blocks are calibrated to be accurate at 20 °C (68 °F) and should be kept at this temperature when taking measurements.

5. CONSTRUCTION OF SINE BAR ■ Sine bar has some major parts — End face Upper surface Rollers Lower surface Relief holes

6. WORKING PRINCIPLE OF SINE BAR When a sine bar is placed on a level surface the top edge will be parallel to that surface. If one roller is raised by a known distance, usually using gauge blocks.

7. WORKING PRINCIPLE OF SINE BAR Then the top edge of the bar will be tilted by the same amount forming an angle. That may be calculated by the application of the sine rule. sin(ϴ) = H/L

8. ADVANTAGES AND DISADVANTAGES ■ Advantages of Sine bar : It is precise and accurate angle measuring device. It is simple in design and construction. It is casily available. ■ Disadvantages of Sine bar : It is limited upto 45⁰. Length of the sine bar should be greater or equal length of the component to inspected. Time consuming process.

9. APPLICATIONS OF SINE BAR To measure the angle. Check the angle of tapper key. Check the unknown angle or heavy components. Ensuring accurate setups in manufacturing and engineering. Aligning workpieces at specific angles. Calibration of other measuring instruments. Verifying the flatness and parallelism of surfaces.

10. APPLICATIONS OF SINE BAR

11. Thank you