Intersection cross hole processing method

Abstract

The invention discloses an intersection cross hole processing method, which comprises the following steps of: 1) processing a first structural hole on a workpiece body; 2) drilling a preformed hole coaxial with a second structural hole on the workpiece body, wherein the diameter of the preformed hole is smaller than the set diameter of the second structural hole, spaces enclosed by the preformed hole and the first structural hole have no overlapped area, and the preformed hole is a through hole; and 3) performing reaming operation on the preformed hole by adopting a reamer with a guiding structure to form the secondary structural hole. The intersection cross hole processing method has the advantages that: an intersection cross hole processing procedure is simplified, a tool is not needed to be replaced midway, the equipment structure is simplified, the efficiency is improved and the intersection cross hole processing accuracy is ensured.

Description

technical field [0001] The invention relates to a machining process, in particular to a machining method for intersecting cross holes. Background technique [0002] Intersecting intersecting holes are common structures in the machinery industry. Taking two structural holes intersecting and intersecting as an example, the structural forms can be divided into two types: perpendicular to the axis of the two holes and oblique to the axis of the two holes, "orthogonal" and " "Oblique" respectively includes the two cases where the axes of the two holes are coincident or parallel, and can be subdivided into two cases where the two holes partially overlap or one hole completely covers the other in a certain area. [0003] When machining intersecting intersecting holes, the drill bit is prone to deflection at the junction of the two holes, resulting in the offset of the axis line of the processed hole, which affects the product quality; the reason is mainly caused by the uneven force...

AI Technical Summary

Problems solved by technology

Therefore, the force on the drill bit at the junction of two holes can be considered as an extreme force imbalance (that is, one side receives cutting resistance and the other side has no cutting resistance). The quality of the hole is no longer necessarily related to the parameter conditions of the drill bit itself, that is, whether the drill bit is ideal or not, it is easy to skew the drilled hole; if you continue to drill down, the axis offset of the drilled hole will become larger and larger, and even Causes the drilled hole to be cut into an oval hole or breaks the drill bit

[0005] see Figure 8 , the method to solve this problem in the prior art is: when the drill bit drills to the junction of the two holes, stop and withdraw the drill bit, and use a rod milling cutter with a cutting edge at the bottom to mill the hole (similar to the operation of machining a half hole, such as Figure 8 As shown on the left), milling from point A to point C, and then switching to the drill bit to continue the drilling operation, due to the very low efficiency of the milling operation, the efficiency of machining workpieces with intersecting cross holes also becomes very low, and In the middle, it is necessary to switch between the drill bit and the rod milling cutter, which increases the complexity of the process and equipment accordingly.

[0006] It is precisely because of the difficulty of drilling as analyzed above that in the prior art, it is difficult to guarantee the center distance between two intersecting holes in the processing of the intersecting intersecting hole structure. There are many processes, high cost, low processing efficiency, etc., and this problem troubled the industry for many years

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