A sine wave plate is used to measure angles of industrial objects, such as automobile parts. It consists of two parallel steel plates supported by metal bars and cylinders. Gauge blocks are stacked to equal a constant, which is calculated using a sine plate graph and tape measure. There are two types: magnetic and compound sine plates.
A sine wave plate is a precision manufacturing tool used to measure the angles of larger industrial objects, typically automobile parts. The angles of these parts are usually difficult to measure due to their awkward or awkward shape. To measure an angle using this piece of equipment, professionals use a sine wave graph of constants, measuring blocks, and tape measure. Notable types of this instrument include the magnetic sine plate and compound sine plate.
This device consists of two steel plates that lie parallel to each other. These plates are supported by two metal bars which are located at opposite ends of the plates. The bars keep the plates separated by an equal distance. There are also two cylinders at each end and the distance between the centers of these cylinders is carefully noted. This distance is used when measuring an angle serving as the hypotenuse of the formulated triangle.
In work settings, the bottom plate is fixed to the worktop while the top plate is left hinged to one of the metal bars. The gauge blocks are then stacked between the bottom plate and the other metal bar. The top plate serves to stabilize the object while the object is being measured. Contains bolt holes so that an object can be attached to it.
To use a sine plate, you need to determine the center distance of the tool and the angle that needs to be measured. This is done using a tape measure. Next, a sine plate graph is used to calculate the setting constant. The constant is based on the determined wheelbase, desired angle, and inch measurement of the fixture itself. Reference tables are readily available online to assist in setting up constant calculations.
Once the setting constant is established, the gauge blocks are stacked under one of the roll cylinders until their combined height equals the constant. The gauge blocks can be assembled to equal any height from 0.03 inch to 6 inch (0.08 cm to 15 cm). Once the gage blocks are in place and the angle is set, the tool is locked to hold the fixture in place.
There are two major variations of this tool. A magnetic sine plate uses magnets to more effectively hold parts in place, from thin sheets to large pieces. Compound sine plates are used to set compound angles for complex projects that require angles in multiple planes.
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