Automatic boring device

Abstract

The invention belongs to tool installing structures in the field of machining, and particularly relates to an automatic tool relieving device for boring. The automatic tool relieving device comprises a fixed tool frame and a rotating tool frame, wherein the fixed tool frame is installed on a toolbar, the rotating tool frame is hinged to the fixed tool frame through a pin shaft, and a tool is installed on the rotating tool frame. When the rotating tool frame rotates around the pin shaft, the nose of the tool will be made to get close to or away from the wall of a hole to be machined, a limiting part is arranged between the rotating tool frame and the fixing tool frame, when the rotating tool frame rotates under the action of axial cutting force, the limiting part can be attached to stop the rotating tool frame from rotating further, and then axial support is provided for the rotating tool frame. When tool relieving for boring is completed, the tool transmits axial force to the rotating tool frame, the rotating tool frame swings around the pin shaft in the inverse direction by a certain angle, resistance, suffered from a workpiece, of the nose of the tool is substantially reduced, and therefore the workpiece can be effectively prevented from being damaged through pulling, and the nose of the tool can be effectively prevented from tipping.

Description

technical field [0001] The invention belongs to a tool installation structure in the field of mechanical processing, and in particular relates to an automatic tool release device for boring. Background technique [0002] The inner hole of the workpiece is generally processed by the boring process. However, when the blind hole is processed by the boring process, there are often the following defects: because the workpiece is a blind hole, the tool must return to the original path after the boring is completed. In order to increase the rigidity of the boring bar, the boring The rod generally needs to be radially supported in the workpiece hole, but the tool rod cannot move radially after the support is added. During the machining process, the tool system elastically deforms due to force and retreats from the theoretical position in contact with the workpiece. The elastic deformation After the boring is completed, a large stress will be generated between the cutter head and the...

AI Technical Summary

Problems solved by technology

[0002] The inner hole of the workpiece is generally processed by the boring process. However, when the blind hole is processed by the boring process, there are often the following defects: because the workpiece is a blind hole, the tool must return to the original path after the boring is completed. In order to increase the rigidity of the boring bar, the boring The rod generally needs to be radially supported in the workpiece hole, but the tool rod cannot move radially after the support is added. During the machining process, the tool system elastically deforms due to force and retreats from the theoretical position in contact with the workpiece. The elastic deformation After the boring is completed, a large stress will be generated between the cutter head and the inner wall of the hole, and then the workpiece will be stuck and the tool will be chipped when the tool rod exits the workpiece. Therefore, to ensure the processing quality, it is necessary to leave a large enough floating boring amount, which will greatly reduce the processing efficiency

However, if there is no support in the workpiece hole, although it is possible to retract the tool radially and then retract the tool bar axially before the tool bar is retracted after machining the inner hole, it will avoid the knife and damage the tool, but it will make the tool bar The rigidity is greatly reduced, and its processing quality and efficiency are difficult to guarantee, and even the processing cannot be completed

Images