Adjustable positioning and marking device for pipe structure

Abstract

The invention discloses an adjustable positioning marking device used for pipe structures. The adjustable positioning marking device comprises a cross-shaped flexible rule and a marking flexible rule. The cross-shaped flexible rule is provided with a cross-shaped positioning groove. The marking flexible rule is provided with a linear groove which can be attached to a transverse groove body or a longitudinal groove body of the cross-shaped positioning groove. The marking flexible rule is accurately clamped on the cross-shaped positioning groove through limiting columns arranged at the two ends of the linear groove, and marking is carried out on the surface of the structure of a test piece through a marking needle along the linear groove. A locking device is arranged at one end of the cross-shaped flexible rule and comprises a screw, a rotating handle and a locking buckle. A locking groove is formed in the other end of the cross-shaped flexible rule. Multiple cross-shaped flexible rules are connected in a head-to-tail mode by screwing the locking grooves and the locking buckles through the screws, and an adjustable closed loop is formed through attraction of magnets symmetrically arranged on the cross-shaped flexible rules to be fixed on the inner surface and the outer surface of the pipe test piece. By means of the adjustable positioning marking device, the working procedure of drawing a generatrix is omitted, the working efficiency is improved, independent use or united assembling use can be achieved, and the adjustable positioning marking device is suitable for positioning marking on the inner surfaces and the outer surfaces of the different-size pipe structures with cross sections in different shapes.

Description

technical field [0001] The invention relates to an adjustable positioning and scribing device, in particular to a positioning and scribing device for sticking positions of strain gages in the internal and external resistance strain measurement of pipe structures with various shapes. Background technique [0002] In the technical field of measuring resistance strain, the traditional method is to draw the busbar on the test piece in advance as a basis for positioning, and then use a needle and ruler to draw a cross on the test piece along the length direction of the test piece and its vertical direction. Type thin wires, so that strain gauges are pasted at the center of each cross, and the structural response of the tested piece is obtained by converting the resistance signal into strain data. Because this method needs to draw the busbar in advance, the operation is complicated and the work efficiency is low; secondly, in the process of using a variety of line drawing tools (r...

AI Technical Summary

Problems solved by technology

Because this method needs to draw the busbar in advance, the operation is complicated and the work efficiency is low; secondly, in the process of using a variety of line drawing tools (ruler, square, foreign gun, needle, etc.), deviations are prone to occur, which affects the positioning accuracy; Moreover, the current variety of scribing tools cannot guarantee complete fit on pipe test pieces of different cross-sectional shapes and sizes, and the adaptability is not good.

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