How to check the dimensions of shaft forgings
2022-10-10
The main tools for measuring the geometric shape and size of shaft forgings are steel ruler, caliper, vernier caliper, depth ruler, Angle ruler, etc. Shaft forgings with special or complex shapes can be tested with sample plates or special instruments. General shaft forging inspection has the following contents:
1. Check length, width, height and diameter of shaft forgings. The main use of calipers, calipers.
2. Check the inner hole of shaft forging. Calipers and calipers without gradients and plug gauges with gradients.
3. Shaft forging special surface inspection. Such as blade profile size can be used profile sample, inductance meter, optical projector to check.
4. Inspection of shaft forging misshift. For the shaft forging with complex shape, the scriber method can be used to draw the center lines of the upper and lower die of the shaft forging respectively. If the two center lines coincide, it means that the shaft forging has no wrong shift. If they do not coincide, the spacing of the two center lines is the amount of misshift of the shaft forging. Shaft forgings with simple shapes can be empirically observed with the eye or with the aid of simple tools to see if the amount of misshift is within the allowable range, and can also be inspected with sample plates.
5. Check the bending degree of shaft forging. The shaft forgings are usually rolled on a platform or supported by two fulcrum to rotate the shaft forgings, and the bending value is measured by a micrometer or a scribing plate.
6. The inspection of warp degree of shaft forging is to check whether the two planes of shaft forging are in the same plane or keep parallel. Usually, the shaft forging is placed on the platform, and a part of the shaft forging is held by hand. When there is a gap between the other plane part of the shaft forging and the platform plane, the gap size caused by warping is measured with a feeler, or the pendulum momentum of warping is checked by a dial gauge on the shaft forging.
1. Check length, width, height and diameter of shaft forgings. The main use of calipers, calipers.
2. Check the inner hole of shaft forging. Calipers and calipers without gradients and plug gauges with gradients.
3. Shaft forging special surface inspection. Such as blade profile size can be used profile sample, inductance meter, optical projector to check.
4. Inspection of shaft forging misshift. For the shaft forging with complex shape, the scriber method can be used to draw the center lines of the upper and lower die of the shaft forging respectively. If the two center lines coincide, it means that the shaft forging has no wrong shift. If they do not coincide, the spacing of the two center lines is the amount of misshift of the shaft forging. Shaft forgings with simple shapes can be empirically observed with the eye or with the aid of simple tools to see if the amount of misshift is within the allowable range, and can also be inspected with sample plates.
5. Check the bending degree of shaft forging. The shaft forgings are usually rolled on a platform or supported by two fulcrum to rotate the shaft forgings, and the bending value is measured by a micrometer or a scribing plate.
6. The inspection of warp degree of shaft forging is to check whether the two planes of shaft forging are in the same plane or keep parallel. Usually, the shaft forging is placed on the platform, and a part of the shaft forging is held by hand. When there is a gap between the other plane part of the shaft forging and the platform plane, the gap size caused by warping is measured with a feeler, or the pendulum momentum of warping is checked by a dial gauge on the shaft forging.
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