CN102000947B

CN102000947B - Method for milling two half bushes

Info

Publication number: CN102000947B
Application number: CN2010105068322A
Authority: CN
Inventors: 李英举
Original assignee: Shenyang Aircraft Industry Group Co Ltd
Current assignee: Shenyang Aircraft Industry Group Co Ltd
Priority date: 2010-10-14
Filing date: 2010-10-14
Publication date: 2012-06-06
Anticipated expiration: 2030-10-14
Also published as: CN102000947A

Abstract

The invention relates to a method for milling two half bushes. The method comprises the following steps of: 1) processing a bush inner hole and an outer circle with a bar stock; 2) performing a first bush milling step, namely, arranging a bush of which the inner hole and the outer diameter are processed on a central spindle, arranging the bush on a milling machine table and aligning the right side of a milling blade over against the center of a tubular blank of the bush for milling; 3) performing a second bush milling step, namely, moving a transverse milling machine table backward by S and rotating the tubular blank of the bush clockwise by an angle of alpha for milling; 4) performing a third bush milling step, namely, moving the transverse milling machine table forward by a half B of the opening size value of the tubular blank of the bush and rotating the tubular blank of the bush clockwise by 180 degree-alpha for milling; and 5) performing a fourth bush milling step, namely, moving the transverse milling machine table backward by 2B-S and rotating the tubular blank of the bush clockwise by an angle of alpha for milling. The method has the advantages of saving materials, lowering production cost and enhancing the processing accuracy of a main spindle bush.

Description

Milling method for two half bearing bushes

The technical field is as follows:

the invention relates to a method for processing two half type main shaft bearing bushes for a cylindrical grinding machine.

Background art:

the main shaft bearing bush of the cylindrical grinding machine is of two semicircular structures, the main shaft bearing bush is divided into an upper bearing bush and a lower bearing bush, the upper bearing bush and the lower bearing bush form a group of main shaft bearing bushes, the two semicircular main shaft bearing bushes, namely the upper bearing bush and the lower bearing bush, need to be processed again during repair, and worn main shaft bearing bushes need to be replaced. The machining precision of the bearing bush is influenced.

The invention content is as follows:

the invention aims to provide a milling method of two half axle tiles, which can save materials; the purpose of the invention is realized by the following technical scheme: the milling processing method of the two half bearing bushes comprises the following steps:

1) processing an inner hole and an outer circle of the bearing bush: processing the inner hole and the outer diameter of the bearing bush by using a bar material;

2) milling a bearing bush for the first step: mounting the bearing bush tubular blank with the processed inner hole and outer diameter on a mandrel and a milling machine workbench, aligning the right side surface of a milling cutter blade to the center of the bearing bush tubular blank, and milling by the milling cutter blade with the thickness of S;

3) and milling the bearing bush for the second step: moving a transverse workbench of the milling machine backwards by S, clockwise rotating the bearing bush tubular blank by an angle alpha, and milling;

4) and milling the bearing bush in a third step: moving a transverse workbench of a milling machine forwards to half B of the size value of the opening of the bearing bush tubular blank, clockwise rotating the bearing bush tubular blank by 180-alpha, and milling;

5) milling the bearing bush: and moving the transverse workbench of the milling machine backwards for 2B-S, clockwise rotating the bearing bush tubular blank by an angle alpha, and milling.

The invention has the advantages that: the spindle bearing bush for the cylindrical grinding machine can be processed into two semicircular structures by adopting a round bar stock, so that the material is saved, the production cost is reduced, and the processing precision of the spindle bearing bush is improved.

Description of the drawings:

FIG. 1 is a schematic sectional view of a group of spindle and bearing bush assembly of a cylindrical grinding machine;

FIG. 2 is a schematic sectional view A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view B-B of FIG. 1;

FIG. 4 is a schematic view of a bearing bush tubular blank mounted on a milling machine to be milled;

FIG. 5 is a schematic view of a first step of milling a tubular blank of a bearing bush;

FIG. 6 is a schematic view of a second step of milling a tubular blank of a bearing bush;

FIG. 7 is a schematic view of a third step of milling a tubular blank of a bearing bush;

FIG. 8 is a schematic view of a fourth step of milling a tubular blank of a bearing bush;

fig. 9 is a schematic sectional view of a group of spindle and bearing bush assembly of the cylindrical grinding machine after machining.

In the figure: 1. the upper bearing bush 2, the lower bearing bush 3, the tubular blank of the bearing bush 4, a milling cutter blade D, the diameter D of the excircle of the bearing bush, the diameter B of the inner circle of the bearing bush, the 1/2 opening width B after the milling of the bearing bush is 3mm alpha, the clockwise rotation angle alpha S of the tubular blank of the bearing bush during the second step of the milling of the bearing bush, the thickness 6 of the milling cutter blade, a cutter shaft 7, a common horizontal milling machine 8, a transverse workbench 9, a clockwise rotation direction 10 of a part, a backward direction 11 of the transverse workbench and a forward direction of the transverse workbench

The specific implementation mode is as follows:

taking the diameter D of an inner hole of a group of main shaft bearing bushes of the cylindrical grinding machine equal to 74.5mm and the diameter D of the outer circle of the main shaft bearing bushes equal to 101.1mm as an example:

the milling processing method of the two half bearing bushes comprises the following steps:

1) processing an inner hole and an outer circle of the bearing bush: processing the inner hole diameter D of the bearing bush to be 74.5mm and the excircle diameter D to be 101.1mm by using a bar stock to form a tubular blank of the bearing bush;

2) milling a bearing bush for the first step: mounting the bearing bush tubular blank with the machined inner hole and the machined outer circle on a mandrel, wherein the matching between the outer diameter of the mandrel and the inner hole of the bearing bush is H7/f7, mounting the mandrel on a milling machine workbench, aligning the right side surface of a milling cutter blade to the center of the bearing bush tubular blank, and milling and machining the milling cutter blade with the thickness S of 2 mm;

3) and milling the bearing bush for the second step: moving the transverse worktable of the milling machine backwards by S being 2mm, rotating the tubular blank of the bearing bush clockwise by an angle alpha being 2DarcSin 2B/D/(D + D) being 3 degrees 55', and milling;

4) and milling the bearing bush in a third step: moving a transverse workbench of a milling machine forward to half of the size value B of the opening of the bearing bush tubular blank to be 3mm, clockwise rotating the bearing bush tubular blank by 180-alpha, namely 180-3-55 '-176-05', and milling;

5) milling the bearing bush: and (3) moving the milling machine workbench backwards and transversely by 2B-S, namely 2 multiplied by 3mm-2mm to 4mm, and milling the bearing bush tubular blank by clockwise rotating the bearing bush tubular blank by an angle alpha, namely 3 degrees and 55 degrees.

The fourth step is finished and is used for rotating the upper bearing bush anticlockwise by 3 degrees and 55 degrees, two common surfaces of the bearing bush are attached, the distance between the other two planes is made to be 6mm, the requirement of bearing bush design drawing is met, materials are saved, the production cost is reduced, the errors of the inner hole, the outer circle and the length of the main shaft bearing bush in machining are eliminated, and the machining precision of the main shaft bearing bush is improved.

Claims

1. The milling processing method of the two half bearing bushes comprises the following steps:

5) milling the bearing bush: moving a transverse workbench of the milling machine backwards for 2B-S, clockwise rotating the bearing bush tubular blank by an angle alpha, and milling;

wherein,d is the diameter of the outer circle of the bearing bush, and D is the diameter of the inner circle of the bearing bush.