How to measure the straightness of stainless steel hexagon socket screw?

Stainless steel hexagon screw materials generally have stainless steel plate SUS201, stainless steel plate SUS304, stainless steel plate SUS316 these. There are two kinds of hexagonal screws of stainless steel plate with extruded taps and no extruded taps at the head top.

How to measure the straightness of stainless steel hexagon socket screw?1. Place the stainless steel hexagon socket screw that has been accurately measured in the middle of the fixed fixed guide rail and the adjustable theme movable guide rail, pay attention to most of the length of the arc half warp under the screw head or head and neck expansion that bypass the standard tolerance.

2. Pick the screws and locate the position where the bending degree of the rod part is large, then tighten the fixing screw to fix and adjust the slide rail. According to the vernier calipers, the distance between two parallel slide tracks can be read.

3. The total amount of bending is calculated as follows: Screw exact measurement times the allowable value of parallelism per foot listed in the table. In addition, consideration should be given to the exact measurement of the diameter of the external thread for precise measurement.

4. Distinguish whether the parallelism deviation is based on: adjust the theme activity guide rail in accordance with the value of parallelism listed in the table, and screw the screw firmly, then turn the stainless steel hexagon socket screw put in, if the screw and rail caused by interference stop rotation, it shows that the screw parallelism deviation.