CN102303144A

CN102303144A - Method for machining deep holes

Info

Publication number: CN102303144A
Application number: CN201110239630A
Authority: CN
Inventors: 徐家安; 王伟
Original assignee: HUNAN KS MACHINE CO Ltd
Current assignee: HUNAN KS MACHINE CO Ltd
Priority date: 2011-08-20
Filing date: 2011-08-20
Publication date: 2012-01-04
Anticipated expiration: 2031-08-20
Also published as: CN102303144B

Abstract

The invention relates to a method for machining deep holes. In the method, the deep holes are subjected to rough machining and finish machining by a guiding sleeve, wherein during the rough machining, holes on the outer side in the same direction are subjected to the rough machining by a short cutter with high rigidity, the guiding sleeve is arranged at the outer holes which are subjected to the rough machining, and a rough boring cutter enters the sleeve to play roles in guiding and supporting and perform rough boring on deep holes on the inner side; and during the finish machining, the holes at two ends of the outer side are subjected to the finish machining by the short cutter with the high rigidity in two directions, the guiding sleeve is arranged at the hole at one end, and a finish boring cutter enters the sleeve from the other end to play roles in guiding and supporting and perform finish boring on the deep holes on the inner side. By the method, the problems in the conventional method are solved. The method has the advantages that: 1, the rough and finish boring of the deep holes play a role of correcting for multiple times; 2, the deep holes are machined by the guiding of the high-accuracy outer holes, so the requirement of concentricity is easily met; 3, the guiding sleeve plays the role in supporting, and the rigidity of the cutter during the machining is improved, so the machining accuracy is improved; and 4, the machining efficiency is improved substantially.

Description

A kind of processing method of deep hole

Technical field

The present invention relates to the processing method of deep hole, particularly a kind of processing method with deep hole of higher concentricity required precision.

Background technology

For a long time, the conventional method of horizontal deep hole processing employing.For example, large-scale transmission case body, conventional method is outer hole to be processed deep hole lengthening cutter employing boring process processing with short better rigidity cutter.

The problem that this processing method exists: 1, because outer hole stops that the cutter of deep hole processing must be added to long enough.If 2 knife bars are thin, cutter poor rigidity then, bore hole can not play correcting action, causes the concentricity in hole poor.If 3 knife bars are thick, then the cutter deadweight is heavier, and downward active force has a strong impact on the position degree of the deep hole of processing, thereby causes concentricity poor.4, because cutter is oversize, and rotating speed, the feeding speed of processing are lower, working (machining) efficiency is low.

Summary of the invention

Present in the processing of deep hole in order to overcome, the shortcoming that difficulty of processing is big, cost is high, precision is difficult to guarantee the present invention proposes a kind of new processing method of utilizing fairlead.

The processing method of this deep hole; It is characterized in that; Utilize the thick fine finishining deep hole of fairlead; Roughing:,, utilize rough machined outer hole again with the cutter roughing of short good rigidly with the superolateral hole of same direction; Load onto fairlead; The heavy boring cutter gets in the cover, the effect of playing guiding and supporting, the deep hole that heavy boring is inboard; Fine finishining: come out with the cutter fine finishining of short good rigidly from both direction in the hole at two, the outside, utilize one hole to load onto fairlead again, fine boring cutter gets in the cover from the other end, the effect of playing guiding and supporting, the deep hole that right boring is inboard.

This method has solved the problem in the conventional method: 1, divide thick right boring processing, play the effect of repeatedly revising.2, according to the special fine setting fine boring cutter cutter head of making of product performance, can reach best correction effect, and can easily adjust the aperture.3, utilize the high outer hole of precision to make the guiding deep hole processing, be prone to guarantee concentricity requirement.4, fairlead has played the effect of supporting simultaneously, has improved the cutter rigidity that adds man-hour, has eliminated the downward active force of generation because cutter is conducted oneself with dignity, thereby has improved machining accuracy.5, because rigidity increases, significantly improved working (machining) efficiency simultaneously.

Description of drawings

Fig. 1 is large-scale transmission case body stereogram.

Fig. 2 is a heavy boring fairlead graphics.

Fig. 3 is the rough bore sketch map.

Fig. 4 is a right boring fairlead graphics.

Fig. 5 is the fine boring cutter graphics.

Fig. 6 is a right boring hole sketch map.

Among the figure: 1, large-scale transmission case body, 2, the heavy boring fairlead, 3, the heavy boring cutter, 4, the right boring fairlead, 5, the fine boring cutter cutter head, 6, fine boring cutter, 1.-5., be hole number.

The specific embodiment

Below in conjunction with accompanying drawing, specific embodiments of the invention describes in detail as follows:

Large-scale transmission case body 1 requires to guarantee 1.-the 5. concentricity and the position degree in number hole that workpiece is processed on horizontal revolving table.

The first step: roughing: the cutter roughing that utilizes short good rigidly is number hole and 2. number hole 1.;

Second step: with the deep 2. number inboards, hole of heavy

boring cutter

3,2. heavy boring fairlead 2 is packed in number hole, heavy boring cutter 3 guiding back heavy borings are number hole and 4. number hole 3., sees Fig. 3;

Heavy boring fairlead 2 is that two semicolumns are formed; Axial direction is because step of the different formation of external diameter; Equally distributed circular oil groove 2-3 bar perpendicular to axis is arranged on the inner surface; Also have the equally distributed straight line oil groove 2-3 bar that parallels to the axis on the inner surface, the width of oil groove is the 0.15-0.20 of heavy boring fairlead 2 internal diameters;

The 3rd step: fine finishining: turntable Rotate 180 degree, the fine boring cutter that utilizes short good rigidly is the eccentric 5. number hole that gets into from the other end of large-scale transmission case body 1, and this is because 5. the hole in number outside, hole and 1.-5. number hole be not or not same center, and thick, right boring is number hole 5.;

The 4th step: turntable goes back to reset condition, will be 5. number hole load onto right boring fairlead 4, in right boring fairlead 4, load onto fine boring cutter 6, after fine boring cutter 6 guiding, right boring is number hole and 4. number hole 3.;

Right boring fairlead 4 be one cylindrical; Axial direction is because step of the different formation of external diameter; Equally distributed circular oil groove 2-3 bar perpendicular to axis is arranged on the inner surface; Also have the equally distributed straight line oil groove 2-3 bar that parallels to the axis on the inner surface, the width of oil groove is the 0.1-0.15 of heavy boring fairlead internal diameter;

The front end of fine boring cutter 6 is fixed with guide post; The diameter of guide post is consistent with the internal diameter of right boring fairlead 4; There are some equally distributed circular oil groove perpendicular to axis on the surface of guide post; The spacing of the circular oil groove on the gap ratio right boring fairlead inner surface of its circular oil groove is little by 20%, and the width of its circular oil groove is also littler by 20% than the width of the circular oil groove on the right boring fairlead inner surface.

The 5th step: the fine boring cutter right boring that utilizes short good rigidly is number hole and 2. number hole 1., sees Fig. 6.

Claims

1. the processing method of a deep hole; It is characterized in that; Utilize the thick fine finishining deep hole of fairlead; Roughing:,, utilize rough machined outer hole again with the cutter roughing of short good rigidly with the superolateral hole of same direction; Load onto fairlead; The heavy boring cutter gets in the cover, the effect of playing guiding and supporting, the deep hole that heavy boring is inboard; Fine finishining: come out with the cutter fine finishining of short good rigidly from both direction in the hole at two, the outside, utilize one hole to load onto fairlead again, fine boring cutter gets in the cover from the other end, the effect of playing guiding and supporting, the deep hole that right boring is inboard.

2. the processing method of a kind of deep hole according to claim 1 is characterized in that, concrete steps are following: the first step: roughing: the cutter roughing that utilizes short good rigidly is number hole and 2. number hole 1.;

Second step: with the deep 2. number inboard, hole of heavy boring cutter (3), 2. heavy boring fairlead (2) is packed in number hole, heavy boring cutter (3) guiding back heavy boring is number hole and 4. number hole 3.;

The 3rd step: fine finishining: turntable Rotate 180 degree, the fine boring cutter that utilizes short good rigidly is the eccentric 5. number hole that gets into from the other end of large-scale transmission case body (1), and this is because 5. the hole in number outside, hole and 1.-5. number hole be not or not same center, and thick, right boring is number hole 5.;

The 4th step: turntable goes back to reset condition, will be 5. number hole load onto right boring fairlead (4), in right boring fairlead (4), load onto fine boring cutter (6), after fine boring cutter (6) guiding, right boring is number hole and 4. number hole 3.;

The 5th step: the fine boring cutter right boring that utilizes short good rigidly is number hole and 2. number hole 1..

3. the processing method of a kind of deep hole according to claim 2; It is characterized in that; Heavy boring fairlead (2) is that two semicolumns are formed; Axial direction is because step of the different formation of external diameter; Equally distributed circular oil groove 2-3 bar perpendicular to axis is arranged on the inner surface; Also have the equally distributed straight line oil groove 2-3 bar that parallels to the axis on the inner surface, the width of oil groove is the 0.15-0.20 of heavy boring fairlead internal diameter.

4. the processing method of a kind of deep hole according to claim 2; It is characterized in that; Right boring fairlead (4) be one cylindrical; Axial direction is because step of the different formation of external diameter; Equally distributed circular oil groove 2-3 bar perpendicular to axis is arranged on the inner surface; Also have the equally distributed straight line oil groove 2-3 bar that parallels to the axis on the inner surface, the width of oil groove is the 0.1-0.15 of heavy boring fairlead internal diameter.

5. the processing method of a kind of deep hole according to claim 2; It is characterized in that; The front end of fine boring cutter (6) is fixed with guide post; The diameter of guide post is consistent with the internal diameter of right boring fairlead (4); There are some equally distributed circular oil groove perpendicular to axis on the surface of guide post; The spacing of the circular oil groove on the gap ratio right boring fairlead inner surface of its circular oil groove is little by 20%, and the width of its circular oil groove is also littler by 20% than the width of the circular oil groove on the right boring fairlead inner surface.