A two-jaw chuck suitable for laser cutting equipment for thin-walled pipe fittings

Abstract

The invention belongs to the technical field related to pipe material processing, and discloses a two-jaw chuck suitable for laser cutting equipment for thin-walled pipe fittings, including: a main shaft; The sliding base and the second sliding base are provided with protruding shafts; the first jaw jaw and the second jaw jaw are engaged with each other; the rear parts of the first jaw jaw and the second jaw jaw base are provided with recesses The grooves and grooves are equipped with spring pressure plates; the Archimedes plate includes two centrally symmetrical Archimedes spiral grooves, an avoidance groove and a round hole, and the two protruding shafts are respectively arranged in the Archimedes spiral grooves. Inside; the two ends of the telescopic cylinder are respectively rotated to connect one end of the pin shaft, the other end of the pin shaft is fixed in the round hole, and the pin shaft passes through the escape groove and is fixed on the main disk. The application can realize the compliant centering clamping of the pipe fittings, has good adaptability to the shape of the pipe material, and has precise positioning.

Description

technical field [0001] The invention belongs to the technical field related to pipe material processing, and more specifically relates to a two-jaw chuck suitable for laser cutting equipment for thin-walled pipe fittings. Background technique [0002] The current processing of precision thin-walled tubes is usually done by laser cutting. The cross-sectional shapes of the tubes to be processed in the market are various, such as round tubes, rectangular tubes, elliptical tubes, etc. In order to ensure that the focus of the laser beam coincides with the processing point of the tube, it is necessary to The tube is clamped with a precise positioning fixture that can adapt to different shaped cross-sections, and the tube feed is controlled during processing. [0003] Chinese patent CN107984157A discloses a cylinder-driven four-jaw chuck. The four jaws of the chuck are respectively connected by four cylinders through hinges, and the relative jaws are realized by synchronously rotat...

AI Technical Summary

Problems solved by technology

[0004] In the structure of the first two chucks, four cylinders are used to drive each jaw respectively. Such a structure will make the size of the entire chuck larger and occupy too much space on the precision thin-walled tube processing machine tool with small diameter. At the same time, the flat mouth of the claw head of the first type of chuck is very thin, which may cause indentation and damage to the surface of the pipe; the synchronous movement of the second type of chuck is realized by gear meshing transmission, which requires high machining accuracy of the teeth. Otherwise, factors such as tooth thickness error will cause a decrease in synchronization accuracy. In addition, the jaws use a single bearing, and the width is too small, which will cause deflection errors when clamping a pipe with a slightly larger size, resulting in a loss of the clamping and centering performance of the entire chuck. down; the Archimedes disk drive of the third type of chuck is an external engagement drive, which requires measurement and control of the rotation of the disk body and the Archimedes disk when controlling the motor, and the control of the two motors is not understood Coupling, so the control is more complicated. In addition, the claws use ordinary hard claws, which have poor adaptability to pipes with different cross-sectional shapes.

In addition to the above three kinds of chucks, according to the actual application scenarios, there are many different laser processing chuck products on the market. Most of their four-jaw chucks use two pairs of two-jaw linkage jaws, which require two sets of The synchronous mechanism carries out drive transmission. During the clamping process, since one pair of claws always clamps the pipe before the other pair of claws, the friction generated by the claws clamped first may cause the claws clamped behind to fail to hold the pipe in a fixed position. center, affecting the centering accuracy

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