Cam clamping device of laser edge trimmer

Abstract

A cam clamping device of a laser edge trimmer comprises a rotating disc assembly, wherein clamping mechanisms are rotationally arranged on the rotating disc assembly. Each clamping mechanism comprises a rotating wheel, a positioning seat and a plurality of clamping jaw blocks, wherein the clamping jaw blocks are arranged in a positioning base in a sliding and penetrating mode and retract inwards to clamp a metal hollow body. The cam clamping device further comprises an abutting plate and an abutting cam assembly, wherein the abutting plate is provided with a first arc abutting face and surrounds and corresponds to a pre-rotating station and a cutting station of the rotating disc assembly, the abutting cam assembly comprises a wheel disc and a plurality of cam blocks, a plurality of second arc abutting faces are arranged on the circumferential face of the wheel disc in a concave mode, the cam blocks are assembled on the periphery of the wheel disc in a sliding mode and correspond to the second arc abutting faces in a one-to-one mode, a third arc abutting face is formed on the inner side face of each cam block. In the non-clamping state, at least one clamping jaw block abuts against the corresponding second arc abutting face to retract inwards, and at least one clamping jaw block is separated from the corresponding third arc abutting face to extend outwards. In the clamping state, all the clamping jaw blocks abut against the second arc abutting faces or the third arc abutting faces and retract inwards. The cams are ingeniously used for clamping, so that the cam clamping device is more compact in structure, and meanwhile, the cutting quality is guaranteed.

Description

technical field [0001] The invention relates to the field of metal hollow body processing equipment, in particular to a cam clamping device of a metal hollow body laser trimming machine. Background technique [0002] The metal hollow body is a metal cylindrical body with an open end, such as metal cans and power battery shells. Take metal cans (two-piece cans made of iron, aluminum, etc.) as an example. Usually, metal cans are composed of a can lid and a can body. After the can body is stretched and formed, it needs to be cut in the height direction to make the height of the can body consistent. And remove the burr at the mouth of the tank, so the trimming device for the mouth of the tank should be used. [0003] At present, with the application and promotion of laser processing, laser cutting has begun to be applied in metal packaging or new energy industries. The applicant has submitted several patents on non-contact edge trimming of metal hollow bodies. When laser cuttin...

AI Technical Summary

Problems solved by technology

[0007]The fixture drives the workpiece to rotate at high speed to realize laser cutting. Due to the above-mentioned gap between the workpiece and the fixture positioning hole due to the loading and unloading requirements, it will cause There is a jump in the rotation of the workpiece, especially the existence of the normal airflow during laser cutting, which exacerbates the jump

The jump causes the instantaneous tangent point of the workpiece to oscillate near the laser focus, resulting in a decrease in the quality of the incision, and even serious defects in the unequal incision

During cutting, the suction force of the vacuum on the bottom plate of the workpiece can be kept in the fixture, which can restrain the jumping of the can body when it rotates to a certain extent, but the existence of the gap and cutting air flow makes it impossible to meet the requirements of cutting quality only by vacuum suction

Reducing said gap reduces runout but increases risk of charge failure

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