Types of Angle plates
. the constructional features of different types of angle plates
. the types of angle plates
. the uses of different types of angle plates
. the grades of angle plates
Specify angle plates.
Contractional features
Angle plates have two plane surface, machined perfectly flat andd at right angles. Generally these are made of closely grained cast iron or steel. The edges and ends are also machined squre. They have ribs on the unmachined part of good rigidity and to prevent distortion.
Types of Angle plates
Among the three types of angle plates normally used, the plain solid angle plate is the most common. It has the two plane surface perfectly machined at 90° to each other. Such angle plates are suitable for supporting work pieces during layout work. They are comparatively smaller in size.
Slotted type angle platesThe two plane surfaces of this type of angle plate have slots milled. It is comparatively bigger size than the plain solid angle plates. The slots are machined on the top plane surfaces for accommodating clamping blots. Thid type of angle plate can be tilted 90° along with the work the marking of machining.
Swivel type angle plateThis is adjustable so that the two surfaces can be kept at an angle. The two machined surfaces are on two seperate pieces which are assembled. Graduations are marked on one to indicate the angle of tilt with respect to the other. When both zeros coincide, the two plane surfaces are at 90° to each other. A bolt and nut are provided for looking in position.
Box angle plates
They have application similar to those of other angle plates. After seting, the work can be turned over with the box enabling further marking out or machining. This is a significant advantage.this has all the faces machined squre to each other.
Grades
Angle plates are available in two grades Grade 1 and Grade 2.the grade 1 angle plates are more accurate and used for very accurate tool room type of work. The grade 2angle plates are used for general machine shop work. In addition to the above two grades of angle plates, precision angle plates are also available for inspection work.
Sizes
Angle plates are available in different sizes. The sizes are indicated by numbers.
Specifiction of Angle plates
a) size 6 Grade 1
Box plate will be designated as box angle plate 6 Gr 1 IS 623
b)size 2 Grade 2angle plate will be designated as
Angle plate 2Gr 2 I.S 623
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