Hole opening method for jack cylinder bottom and auxiliary tool for welding

Abstract

The invention discloses a hole opening method for a jack cylinder bottom and an auxiliary tool for welding. A stroke sensor detection rod installation hole is processed when the cylinder bottom is processed. When the method is used for opening holes at the cylinder bottom, a required hole opening cutter is short, thereby guaranteeing that the size and the form and position tolerance of the stroke sensor detection rod installation hole are small and improving coaxial accuracy of the stroke sensor detection rod installation hole and a cylinder. The invention further provides an auxiliary tool for welding, which is used for locating butt welding between the cylinder bottom of a jack and a cylinder set. Due to the fact that the stroke sensor detection rod detection rod installation hole is processed firstly, the hole is small in the size and the form and position tolerance. Therefore, when the auxiliary tool for the welding is used for datum transformation, error is little. Thus, coaxial degree between the stroke sensor detection rod installation hole and the cylinder is enabled to be high.

Description

technical field [0001] The invention relates to the technical field of jack manufacturing, in particular to a method for opening a cylinder bottom of a jack with a stroke sensor and an auxiliary tooling for welding. Background technique [0002] Jack is a kind of light and small lifting equipment that uses a rigid jack as a working device to lift heavy objects in the stroke by a top bracket or a bottom claw. Since the jack is a kind of lifting device, the rigid lifting part used for jacking in the jack needs to maintain a high parallelism between the axis direction and the load-bearing direction or the axis direction and the moving direction in the working state, so as to avoid The bending moment is generated due to the load bearing, and the bending phenomenon of the rigid jacking part occurs. [0003] A jack with a stroke sensor includes a cylinder bottom, a cylinder barrel and a stroke sensor detection rod. The cylinder bottom has a stroke sensor detection rod installatio...

AI Technical Summary

Problems solved by technology

In the above method, the stroke sensor detection rod mounting hole a' is converted through the positioning bracket socket b' to achieve a high degree of coaxiality with the cylinder 2'. In the process of benchmark conversion, the positioning bracket will inevitably appear The matching error between the socket b' and the cylinder 2', between the positioning frame socket b' and the cylinder bottom 1', these two errors will produce a large degree of error in the process of processing the stroke sensor detection rod mounting hole a' error

Moreover, the machining process of welding the cylinder 2' and then turning the hole requires a long tool to penetrate into the cylinder 2' during the hole opening process, which increases the difficulty of processing

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