Method for processing center frame of equal height triangle sleeve barrel structure and triangle sleeve barrel

Abstract

The invention relates to a processing method of a central frame and a triangle sleeve of an equal-height triangle sleeve. The invention includes the steps: (1) a debugging bar is designed and manufactured; (2) the debugging bar is used for a grinding trial to regulate a cylindrical grinder for use; (3) a machine tool is regulated by the debugging bar to be a standard external grinding required by the grinding of the triangle sleeve; (4) three guide faces of the triangle sleeve which have a 60 degree angle with each other are respectively grinded out through three-time positioning on a 60-degree clamp on a electromagnetic absorbing disk of a plane grinder; (5) a mutual parallel degree between three faces is detected and is less than 0.003mm. The invention has beneficial effects that the structure loading contact area of the equal-height triangle sleeve is big; the loading capability is strong and the guide accuracy is high. No distortion happens to the moving direction of the triangle sleeve under the effect of forces from any direction. Not only a fact that a wear-resistant PTFE support face fixed at the front end of the triangle sleeve contacts the supported external circularity on one generatrix can be guaranteed, but also the structural central frame of the equal-height triangle sleeve is convenient for repairing.

Description

technical field [0001] This patent relates to a novel center frame with a triangular sleeve structure of equal height and a processing method for a high-precision triangular sleeve. The new contoured triangular sleeve structure can be expanded and applied to other fields such as tailstock in machine tools. Background technique [0002] All kinds of medium-sized precision internal grinding machines at home and abroad are equipped with the traditional circular sleeve center frame, and there are the following technical problems: [0003] 1. There must be a gap for the circular sleeve to move sensitively. Even if the screw is used to lock it radially, its contact is still a busbar contact in the axial direction in principle. After locking, due to the existence of the gap, not only the support rigidity is affected , and there will be slight shaking during the grinding process, which will affect the high-precision grinding quality of the inner hole. [0004] 2. The guide and loc...

AI Technical Summary

Problems solved by technology

The height of the contact support point changes due to twisting, which causes the drift of the support center of the part, which not only makes it difficult to adjust at the μm level, but also reduces the stability of the grinding accuracy after adjustment and locking

[0005] 3. Because most of the adjustment screw of the center frame sliding sleeve adopts a large pitch, the thread gap is not eliminated

According to the processing requirements, even if the lead screw is slightly adjusted, the movement of the sliding sleeve will be large. It is very difficult and time-consuming to adjust and align to the μm level.

Due to the existence of gaps in the screw pair during processing, under the action of gravity and grinding force after locking, the sliding sleeve will move slightly in the axial direction, which will destroy the original adjustment accuracy

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