METHOD AND DEVICE FOR MEASUREMENT OF TENSION OF TAPER THREAD Russian patent published in 2006 - IPC G01B3/40 

FIELD: inspection and measurement engineering.

SUBSTANCE: method of measurement of tension of taper thread is based upon usage of inspection tool with taper thread measuring surface or with taper smooth measuring surface. Edge of instrument and edge of thread to be measured are loaded to each other (are put together) through separation member disposed between edges. Separation member provides fixed reproducing distance between surfaces of edges while repeating them to put together or to load one to the other. Then position of measurement tool is determined at the loaded position by means of linear tester. Separating unit is removed out of area of measurement and measuring tool is tied with thread to be measured. Axial position of tool is determined when the tool is integrated with thread to be measured. Tension of thread to be measured is judged from distance between plane of edge of thread to be measured and measuring planes of tool integrated with thread. Tension is defined as difference in values of two distances. First distance is the distance between measuring plane of tool and plane of edge of thread to be measured at the state when tool and thread are loaded through separating member. Second distance is the distance between axial positions of tool when front edge of instrument is loaded against edge of thread to be measured through separating member and when instrument is put together with thread to be measured. Device for measurement of tension of taper thread has inspection tool with taper threaded or with taper smooth measuring surface, aid for placing item to be inspected, linear meter with scale and measuring rod and separating member. Separating member provides keeping of fixed reproduced distance between planes of edges of instrument and thread member when they are loaded against each other repeatedly. There are aids which provide movement of separating member into area between edges of instrument and edges of thread to be measured as well as removal of separating member out of the area; it also provides ability of shift of the instrument along axis of thread to be inspected. There are aids fro putting instrument together with thread to be inspected. Inspection measurements can be made independently on degree of availability of surfaces of thread to be measured and inspection tool used for measurements.

EFFECT: improved precision of measurement; reduced labor input.

8 cl, 10 dwg