CN105090247A - Thin-wall shaft sleeve machining method - Google Patents

Abstract

The invention discloses a thin-wall shaft sleeve machining method which comprises the following steps of blanking, forging, oil hole drilling, outer circle and end face turning, large end face grinding, outer circle coarse grinding and inner hole grinding. In the step of grinding an inner circle, a fixing manner is achieved through a coreless supporting manner. Namely, the outer circle of a workpiece is supported by a supporting part, the large end face of the workpiece is attracted and fixed by a magnet, and the magnet is rotated to drive the workpiece to rotate during grinding. The fixing method guarantees the fixing stability, is convenient to operate, solves the problem of outer circle deformation caused by a general fixing method used in the prior art, guarantees the product quality and reduces the rejection rate of products. In the step of finely grinding the outer circle, inner holes of two workpieces are arranged on a coreless grinding machine to be machined at the same time. Thus, the machining efficiency is improved. Meanwhile, round steel is used as raw materials, and round steel sections are forged at first. Thus, the defects of air holes, shrinkage holes and dendritic crystals in the round steel sections are overcome; and the mechanical property of the workpieces is more excellent.

Description

A kind of processing method of thin-wall shaft sleeve

Technical field

The present invention relates to mechanical manufacturing field, especially a kind of processing method of thin-wall shaft sleeve.

Background technique

In moving element; the wearing and tearing of part are caused because of long-term friction; must renewal part when the gap in axle and hole may wear to a certain degree time; therefore when design, artificer selects that hardness is lower, the good material of wear resistance is as axle sleeve or lining; to protect rotating shaft; the wearing and tearing of axle and seat can being reduced like this, when axle sleeve or liner wear are changed to a certain extent, the cost because changing axle or seat can being saved like this.Require in higher mechanical structure at some to sealability, require that the thickness of axle sleeve is limited within the scope of certain, need to be fixed axle sleeve in course of working, positioning means in existing processing technology is when clamping axle sleeve, inside squeezing action can be produced to axle sleeve wall, because the thickness of axle sleeve is less, if the power of squeezing action is excessive, then axle sleeve can be caused to be out of shape and to scrap; And if the power of clamping is too small, then clamping can be caused again unstable, add and can cause workpiece variation again man-hour, thus strongly limit manufacturing efficiency, too increase cost of production.Secondly, in existing processing technology, at the outer bowlder of Grinding of Shaft Sleeve, adopt universal grinding machine external and traditional top means of fixation, can only fix and process a workpiece, limited efficacy at every turn.Meanwhile, in prior art, normal round steel pipe or the conical steel pipe of adopting is as axle sleeve blank, and this blank inside may exist the defects such as pore, shrinkage cavity, dendritic crystal, to such an extent as to affects the quality of finished product.

Summary of the invention

For the problems referred to above of the prior art, the present invention proposes a kind of processing method of thin-wall shaft sleeve.

Technological scheme of the present invention is: a kind of processing method of thin-wall shaft sleeve, comprises the following steps:

A, blanking: according to required size and choice of material round steel, and by size requirements cut into chunks material for subsequent use as workpiece;

B, forging: workpiece is put into the equipment of forging and forges, then workpiece is put into mould, the dish portion that local upsetting forms large end face is carried out to workpiece, endoporus is rushed with drift, round as a ball, chamfering, expanding treatment carried out to endoporus and stays machining allowance, then taking out workpiece and carry out flat end face, shaping sidewall;

C, brill oilhole: at the oilhole of workpiece Side wall drill two relative axle center symmetries;

D, cylindrical turning and end face: workpiece is fixed on lathe, fine turning outer circle and two end faces also stay machining allowance;

E, mill large end face: workpiece is fixed on surface grinding machine, plain grinding is carried out to size to large end face;

F, corase grind cylindrical: two workpiece are fixed on universal grinding machine external together, then two excircle of workpiece are roughly ground and stayed machining allowance simultaneously, wherein the means of fixation of workpiece is that the large end face of two workpiece fits together by the endoporus of mandrel through two workpiece;

G, mill endoporus: workpiece is fixed on internal grinding machine, refines to size to workpiece inner circle; Wherein the means of fixation of workpiece is that centreless supports, and namely excircle of workpiece is by supports support, and workpiece large end face is fixed by magnet adsorption, is driven workpiece to rotate during grinding by rotor magnet;

H: fine cylindrical: be simultaneously placed between grinding wheel and regulating wheel by two workpiece, wherein the large end face of two workpiece outwardly, refines to size simultaneously, namely obtain finished product to the cylindrical of two workpiece.

Compared with prior art, the invention has the beneficial effects as follows:

1. the present invention is when grinding endoporus, centreless supporting way is adopted to be fixed workpiece, specifically by supports support cylindrical, be fixed by magnet adsorption workpiece large end face, driven by rotor magnet workpiece to rotate during grinding, not only ensure that fixing stability, and it is easy to operate, avoid and adopt conventional fixing means in prior art and the problem that causes cylindrical to be out of shape, ensure that quality of product, decrease product rejection rate;

2. the present invention is when fine cylindrical, adopts two workpiece to be placed on together on centerless grinding machine to carry out grinding simultaneously, and the mode using universal grinding machine external in prior art at every turn can only grinding workpiece, thus present invention greatly enhances work efficiency;

3. the present invention adopts round steel as raw material, and first carry out conducting forging processing to round steel material section, eliminate the defects such as the pore of round steel material intersegmental part, shrinkage cavity and dendritic crystal, relatively traditional use steel pipe is raw material, and workpiece mechanical property of the present invention is more excellent.

Accompanying drawing explanation

Fig. 1 is the structural representation of thin-wall shaft sleeve of the present invention.

Embodiment

Below in conjunction with drawings and Examples, the technological scheme in the present invention is further illustrated.

As shown in Figure 1, the processing method of a kind of thin-wall shaft sleeve of the present invention, comprises the following steps:

A, blanking: according to required size and choice of material round steel, and by size requirements cut into chunks material for subsequent use as workpiece;

B, forging: workpiece is put into the equipment of forging and forges, through forging the defect such as pore, shrinkage cavity and dendritic crystal can eliminating inside workpiece, simultaneously can the thick crystal grain thinning of refinement, make workpiece obtain more excellent mechanical property; Then workpiece is put into mould, local upsetting is carried out to workpiece and forms the dish portion of large end face, rush endoporus with drift, round as a ball, chamfering, expanding treatment are carried out to endoporus and stays machining allowance, for carrying out follow-up fine grinding processing; Take out workpiece again and carry out flat end face, shaping sidewall;

C, brill oilhole: at the oilhole of workpiece Side wall drill two relative axle center symmetries;

D, cylindrical turning and end face: workpiece is fixed on lathe, fine turning outer circle and two end faces also stay machining allowance;

E, mill large end face: workpiece is fixed on surface grinding machine, plain grinding is carried out to size to large end face;

F, corase grind cylindrical: two workpiece are fixed on universal grinding machine external together, then two excircle of workpiece are roughly ground and stayed machining allowance simultaneously, wherein the means of fixation of workpiece is that the large end face of two workpiece fits together by the endoporus of mandrel through two workpiece;

G, mill endoporus: workpiece is fixed on internal grinding machine, refines to size to workpiece inner circle; Wherein the means of fixation of workpiece is that centreless supports, namely excircle of workpiece passes through supports support, workpiece large end face is fixed by magnet adsorption, driven workpiece to rotate by rotor magnet, this means of fixation not only ensure that stability, and easy to operate, avoids and adopts conventional fixing means in prior art and the problem that causes cylindrical to be out of shape, ensure that quality of product, decrease product rejection rate;

H: fine cylindrical: be simultaneously placed between grinding wheel and regulating wheel by two workpiece, wherein the large end face of two workpiece outwardly, refines to size simultaneously, namely obtain finished product to the cylindrical of two workpiece.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (1)

1. a processing method for thin-wall shaft sleeve, is characterized in that: comprise the following steps:

A, blanking: according to required size and choice of material round steel, and by size requirements cut into chunks material for subsequent use as workpiece;

B, forging: workpiece is put into the equipment of forging and forges, then workpiece is put into mould, the dish portion that local upsetting forms large end face is carried out to workpiece, endoporus is rushed with drift, round as a ball, chamfering, expanding treatment carried out to endoporus and stays machining allowance, then taking out workpiece and carry out flat end face, shaping sidewall;

C, brill oilhole: at the oilhole of workpiece Side wall drill two relative axle center symmetries;

D, cylindrical turning and end face: workpiece is fixed on lathe, fine turning outer circle and two end faces also stay machining allowance;

E, mill large end face: workpiece is fixed on surface grinding machine, plain grinding is carried out to size to large end face;

F, corase grind cylindrical: two workpiece are fixed on universal grinding machine external together, then two excircle of workpiece are roughly ground and stayed machining allowance simultaneously, wherein the means of fixation of workpiece is that the large end face of two workpiece fits together by the endoporus of mandrel through two workpiece;

G, mill endoporus: workpiece is fixed on internal grinding machine, refines to size to workpiece inner circle; Wherein the means of fixation of workpiece is that centreless supports, and namely excircle of workpiece is by supports support, and workpiece large end face is fixed by magnet adsorption, is driven workpiece to rotate during grinding by rotor magnet;

H: fine cylindrical: be simultaneously placed between grinding wheel and regulating wheel by two workpiece, wherein the large end face of two workpiece outwardly, refines to size simultaneously, namely obtain finished product to the cylindrical of two workpiece.