A caliper and a method for controlling the starting point of a thread by using the caliper

Abstract

Disclosed are a caliper gauge and a method for controlling a starting point of a thread by using same. The caliper gauge comprises a first benchmark segment and a second benchmark segment which are arranged in a perpendicular mode, wherein one side, facing the second benchmark segment, of the first benchmark segment, is a measurement face, a spiral saw is arranged on the second benchmark segment,one side, far away from the benchmark segment, of the spiral saw, is a positioning face, the positioning face and the measurement face are parallel to each other, and the distance between the positioning face and the measurement face is a thread pitch. By using the caliper gauge, angles and orientations of a position one thread pitch far away from the starting point of the thread can be controlled, and then the position of the starting point is enabled to comply with design requirements, and therefore screwing seal of two pipes on the middle point of a connecting nut is achieved.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a caliper and a method for using the caliper to control the starting point of a large-pitch sawtooth thread. Background technique [0002] For the left-handed large-pitch and right-handed large-pitch sawtooth threads that transmit motion, it is required that when the connecting nut is tightened, it is required to drive the two pipes to move synchronously towards the end face and seal at the end face, and to ensure that the connecting nut is centered after assembly. [0003] In order to meet the above requirements, such as Figure 1a and 1b As shown, the thread starting points at both ends of the connecting nut must be on the same axis section, and the thread starting points at both ends of the pipe fittings must also be on the same axis section, and the angular orientation of the thread starting points on the same axis section is set to 0°. If the starting point of the th...

AI Technical Summary

Problems solved by technology

Using the existing technology for processing, the scribing error is between 0.2-0.5mm, and the accuracy of tool setting is greatly affected by human and objective factors. It is difficult to meet the processing accuracy requirements of the large pitch of the precision transmission movement and the sawtooth thread on the starting point, and for Thread processing involves three major steps of rough machining, semi-finishing and finishing. Due to extrusion, burrs and flashes during thread processing, it is difficult to find the theoretical position of the thread starting point after processing, especially in the half of the thread. In finishing machining, it is necessary to re-clamp and align the tool again. It is almost impossible to use the marking method to find the starting point of rough machining.

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