A Concentric Measuring Tool for 74° Catheter Cone Hole

Abstract

A concentricity measuring gauge for a 74-degree guide pipe conical hole comprises a positioning rod, a fixed reference ruler, a movable measuring ruler, a sector angle plate, a vernier, two sets of supporting arms, a pointer and a rotating shaft. The positioning rod is provided with a lower column structure, a positioning blind groove and an upper positioning face with scales. The sector angle plate is fixed to the upper sector face of the fixed reference ruler, and the back face of the sector angle plate is matched with the movable measuring ruler of a sector plate structure through a rack. The vernier used for pressing the sector angle plate in a matched mode is arranged on the movable measuring ruler. The lower pointed end of the fixed reference ruler and the lower pointed end of the movable measuring ruler are correspondingly clamped in the positioning blind groove of the positioning rod. One of the two sets of supporting arms are hinged in a hinge hole in the lower portion of the pointer through a rotating shaft, and the other set of supporting arms are hinged in a long-strip hole in the middle of the pointer. The free ends of the two sets of supporting arms are symmetrically hinged to the movable measuring ruler and the fixed reference ruler through rotating shafts respectively. The concentricity measuring gauge solves the problem that in practical production, the actual measurement of the concentricity of a guide pipe is 24 h lag behind, and manpower, material resources and time are saved.

Description

technical field [0001] The invention relates to a concentric measuring tool, in particular to a concentric measuring tool suitable for a 74° catheter taper hole. Background technique [0002] The 74° conduit is widely used in industry, agriculture, national defense construction and aviation fields, such as figure 1 As shown, it consists of two parts: a tapered hole and a straight pipe. The tapered hole is a 74° flaring formed by expanding and rolling from the head end of the straight pipe part from the inside to the outside under a certain pressure. The angle of the flared part of the pipe is specified according to the technical requirements. The angular deviation of the cone axis relative to the catheter centerline shall not exceed ±1°30′. At present, the actual measurement of its angle is to inject the colloid into the taper hole and the end of the straight pipe, and then measure the projection angle of the colloid after curing for 24 hours. This method has a long cycle ...

AI Technical Summary

Problems solved by technology

This method has a long cycle and cannot measure the catheters produced in time, which affects the production progress. In addition, the production is only a batch sampling inspection, and it is impossible to do a 100% actual measurement of each catheter. It is easy to cause missed inspections and cause flight safety hazards.

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