CN102794472A - Method for processing large-diameter figure-eight-shaped hole series - Google Patents
Method for processing large-diameter figure-eight-shaped hole series Download PDFInfo
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- CN102794472A CN102794472A CN2012102910854A CN201210291085A CN102794472A CN 102794472 A CN102794472 A CN 102794472A CN 2012102910854 A CN2012102910854 A CN 2012102910854A CN 201210291085 A CN201210291085 A CN 201210291085A CN 102794472 A CN102794472 A CN 102794472A
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Abstract
The invention discloses a method for processing a large-diameter figure-eight-shaped hole series. The hole series comprises a first hole and a second hole which are crossed in parallel to form a figure-eight shape and are cut by a boring tool in a vertical boring way, and the range of a cutting edge angle Alpha of the boring tool is not less than 72 DEG and not more than 90 DEG; and the method comprises the steps as follows: 1), placing workpieces onto a vertical boring worktable and enabling the front end surfaces of the workpieces to face up, and enabling the shaft lines of the first hole and the second hole to be in the perpendicular direction and parallel to a vertical boring spindle; 2), aligning the shaft center of the first hole by a dial indicator and enabling the front end surfaces of the workpieces to be perpendicular to the vertical boring spindle, clamping and fixing the workpieces; 3), carrying out pre-boring, semi-fine boring and fine boring on the first hole in sequence, and blowing away cuttings by compressed air; 4), aligning the shaft center of the second hole on the basis of the shaft center of the first hole; 5), carrying out pre-boring, semi-fine boring and fine boring on the second hole in sequence, and blowing away the cuttings by the compressed air; and 6), deburring, chamfering, and finishing the workpieces. According to the method, the processing precision and the working efficiency are improved; and the method is suitable for cutting the large-diameter figure-eight-shaped hole series in large rotary screw rods or other large workpieces.
Description
Technical field
The present invention relates to a kind of processing method of plant equipment, be specifically related to the processing method of major diameter splayed hole system on a kind of huge revolving screw rod casing, belong to the Machining Technology field.
Background technology
The casing of huge revolving screw rod machine is provided with major diameter splayed parallel hole system; See also Fig. 1; The casing of said huge revolving screw rod machine is made up of upper and lower two halves casing, and this two halves casing is involutory in Hough face 3, on this casing, is provided with first hole 1 and second hole 2 of parallel axes, aperture D >=500 millimeter; Intersect in this first hole 1 and second hole 2 and the centers in two holes all are positioned on the plane of Hough face 3, thereby form major diameter splayed parallel hole system.
Huge revolving screw rod machine belongs to heavy mechanical equipment, and its casing also belongs to heavy parts, so the processing of this major diameter splayed parallel hole system is a great technical barrier.The applicant just is faced with the processing instance of the huge revolving screw rod machine casing of domestic maximum, and the diameter D and the dimensional accuracy thereof in its first hole 1 and second hole 2 reach Φ 816.7H9 millimeter, and two hole centre-to-centre spacing L and precision thereof are 640
+ 0.03Millimeter, hole depth H reaches 1000 millimeters, and the cylindricity required precision in two holes is within 0.035 millimeter deviation.Oversized hole system for large-scale workpiece high-precision requirement like this; The requirement of the usual inaccessible above-mentioned design accuracy of using of process for machining also is difficult to satisfy simultaneously the requirements such as surface roughness Ra 1.6 in bus and 0.02 millimeter of vertical precision that is connected end face and splayed hole in 0.025 millimeter of fair symmetrical accuracy error, first hole 1, splayed hole and second hole 2 of center, hole Hough face 3.
The usual in the past mechanical process technique that adopts of said casing is for being main cut form with the borer position of crouching; At first process first hole; Thereafter according to location, axle center, first hole, reprocessing vertically intersects first hole 1 and second hole 2 in splayed configuration hole, and guarantees two hole centre-to-centre spacing L.Traditional boring processing method for sleeping in has disadvantage: at first; Crouching, first hole 1 of casing is horizontal positioned with the axis in second hole 2 in the boring processing, and the also horizontal clamping of boring cutter also gos deep into first hole 1 with cut in second hole 2, is the oversized hole of heavy parts owing to what process; All the school is big with the area that needs processing for the volume of workpiece; Therefore the volume and weight of boring cutter itself is just quite big, and this can produce sagging distortion because of gravity with regard to causing knife bar, and " bowing " phenomenon takes place the cutter head that is positioned at the knife bar end inevitably; Simultaneously; Boring main shaft for sleeping in and boring cutter stretch out longer, and the influence of radial cutting component and gravity is just serious further, and the hole depth H in said first hole 1 and second hole 2 reaches 1 meter; Therefore the processing shape position error in hole can be very big, is difficult to guarantee the cylindricity in major diameter splayed hole and the required precision that the centre-to-centre spacing machining accuracy reaches technical pattern; Secondly; First hole 1, major diameter splayed hole and second hole 2 are the characteristic that the typical case is vertically intersected the hole; Thereby the operating mode during bore hole is interrupted cut, so just exists in each circle feeding of process tool, and the cutter relieving phenomenon is arranged when cutting in intersection, two holes; The phenomenon of cutting was arranged when cutting out, thereby had a strong impact on the accuracy of form and position in major diameter splayed hole; At last, conventional processing technology path is longer, and the machining period that consumes therefrom is also more, moreover the material of workpiece is the ferrite stainless steel casting, and its processing cutting characteristic is difficult for grasping, so require higher relatively to operator's technical ability.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that overcomes prior art; The processing method of a kind of major diameter splayed hole system is provided; Accuracy of form and position deviation, centre-to-centre spacing accuracy error and the diameter that reduces the system processing of the major diameter splayed hole deviation of beating; To reach the required precision of technical pattern, reduce simultaneously to operator's technical ability require and machining accuracy to the dependence of machine-tool.
It is that the technical scheme taked is following that the present invention addresses the above problem:
The processing method of a kind of major diameter splayed hole system, this hole system is characterized in that by the parallel crossing splayed that forms with second hole in first hole: use boring cutter and carry out cut with upright boring mode.
The scope of the tool cutting edge angle of said boring cutter is 90 ° >=α >=72 °.
The concrete processing step of said processing method is following:
1) place workpiece on the upright boring workbench and front end face up, the axis that makes first hole and second hole is vertically and parallel with upright boring main shaft;
2) adopt dial gauge or amesdial centering axle center, first hole and make the workpiece front end face vertical, then with the workpiece clamping with upright boring main shaft;
3) preparatory successively boring, half right boring and right boring first hole use compressed air to blow down smear metal simultaneously;
4) be axle center, benchmark centering second hole with axle center, first hole;
5) preparatory successively boring, half right boring and right boring second hole use compressed air to blow down smear metal simultaneously;
6) repair a mao chamfered edge, the finishing workpiece.
The difference and the effect of processing method according to the invention and general conventional processing method are:
1, uses the process of upright boring cut, make the gravitational vectors of boring cutter consistent, thereby the influence that the distortion of having avoided boring cutter gravity to cause brings cutting has improved the major diameter splayed aperture size precision and the accuracy of form and position greatly with the cutting direction of feed.
2, strengthened the tool cutting edge angle α of cutting tool; Thereby reduced radial cutting component further; Even the interference of the radial cutting component of can almost ignoring, evade major diameter splayed hole system and added man-hour, the influence that intrinsic interrupted cut is brought machining accuracy.
3, use compressed air to blow down smear metal, avoided smear metal in working angles to the pulling of hole wall, satisfied the requirement of roughness.
4, the axle center with the hole is the centering benchmark of boring; Guaranteed major diameter splayed hole centre-to-centre spacing precision, with vertical precision, the cylindricity in hole and the required precision of roughness of end face; Make processing technology be easy to control; Be convenient to grasp, reduced that technical ability to the operator requires and machining accuracy to the dependence of machine-tool.
Description of drawings
Fig. 1 is that major diameter splayed parallel hole is the structural representation of workpiece.
Fig. 2 is the left cutaway view of Fig. 1.
Fig. 3 is a clamping workpiece sketch map of the present invention.
Fig. 4 is the sketch map of boring cutter of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done detailed explanation, but protection scope of the present invention is not limited to following embodiment, all equivalences of making according to the content of this specification change and revise, and all belong to the protection domain of patent application of the present invention.
See also Fig. 3; Present embodiment is explained content of the present invention with the example that is processed as of the casing of the huge revolving screw rod machine of domestic maximum; This casing has the splayed hole system of first hole 1 and the 2 parallel crossing formation of second hole; The aperture D in first hole 1 and second hole 2 and dimensional accuracy thereof are Φ 816.7H9 millimeter, and Hole Wall Roughness requires to be Ra1.6 that two hole centre-to-centre spacing L and precision thereof are 640
+ 0.03Millimeter, hole depth H is 1000 millimeters, the cylindricity required precision in two holes is within 0.035 millimeter deviation.
The processing method of major diameter splayed of the present invention hole system is used boring cutter and is carried out cut with upright boring mode, sees also Fig. 4, and the scope of the tool cutting edge angle of this boring cutter is 90 ° >=α >=72 °.
The concrete processing step of processing is (roughing is slightly) as follows:
1) with the workpiece front end face up in the face of upright boring main shaft, rear end face places on the adjustable supports of upright boring workbench, the axis that makes first hole 1 and second hole 2 vertically and parallel with upright boring main shaft;
The Hough face 3 of 2) employing dial gauge or amesdial smoothing, the vertical casing in school; Centering 1 axle center, first hole also makes the workpiece front end face vertical with upright boring main shaft; The technological requirement deviation within 0.02 millimeter (like the ultra tolerance value of deviation; Then with front end face finish-milling one cutter, to guarantee that perpendicularity with main shaft reaches technical pattern and requires), clamping workpiece then;
3) preparatory boring first hole 1, dark 20 millimeter detect, proofread and correct preparatory bore hole axle center whether on housing Hough face 3 then, and it is 0.02 millimeter that symmetry requires; The dimensional requirement (Φ 816.7H9) of half right boring and right boring first hole 1 to the technical pattern and face rugosity require (Ra1.6) successively subsequently, use compressed air to blow down smear metal simultaneously.
4) be 2 axle center, benchmark centering second hole with 1 axle center, first hole;
5) preparatory boring second hole 2, dark 20 millimeter, whether the axle center of detecting, proofreading and correct preparatory bore hole centre-to-centre spacing 640 in major diameter splayed hole
+ 0.03In the mm size; The dimensional requirement (Φ 816.7H9) of half right boring and right boring second hole 2 to the technical pattern and face rugosity require (Ra1.6) successively then, use compressed air to blow down smear metal simultaneously.
6) repair a mao chamfered edge, the finishing workpiece.
The major diameter splayed hole system of the domestic huge revolving screw rod fuselage of first system adopts the method for the invention processing, has optimized gold and has cut processing technology, particularly rough machined processing route; Major diameter splayed hole system is connected end face with the hole, all can the alternative milling of car cutting cut processing, has saved comparatively considerable machining period largely, has improved operating efficiency greatly; Also omitted simultaneously workpiece because of the needed frock clamp of revolution processing, made whole processing technology cost descend a bulk of.
The processing method of major diameter splayed according to the invention hole system has improved the accuracy of manufacture of workpiece significantly, has guaranteed crudy, has practiced thrift process time, has improved working (machining) efficiency, for follow-up assembling and adjustment operation provide high-quality parts in addition.
The present invention is applicable to the cut manufacturing of major diameter splayed hole system on huge revolving screw rod machine or other large-scale workpiece.
Claims (3)
1. the processing method of major diameter splayed hole system, this hole system is characterized in that by the parallel crossing splayed that forms with second hole in first hole: use boring cutter and carry out cut with upright boring mode.
2. the processing method of major diameter splayed as claimed in claim 1 hole system is characterized in that: the scope of the tool cutting edge angle of said boring cutter is 90 ° >=α >=72 °.
3. according to claim 1 or claim 2 the processing method of major diameter splayed hole system, it is characterized in that: the concrete processing step of said processing method is following:
1) place workpiece on the upright boring workbench and front end face up, the axis that makes first hole and second hole is vertically and parallel with upright boring main shaft;
2) adopt dial gauge or amesdial centering axle center, first hole and make the workpiece front end face vertical, then with the workpiece clamping with upright boring main shaft;
3) preparatory successively boring, half right boring and right boring first hole use compressed air to blow down smear metal simultaneously;
4) be axle center, benchmark centering second hole with axle center, first hole;
5) preparatory successively boring, half right boring and right boring second hole use compressed air to blow down smear metal simultaneously;
6) repair a mao chamfered edge, the finishing workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102910854A CN102794472A (en) | 2012-08-16 | 2012-08-16 | Method for processing large-diameter figure-eight-shaped hole series |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102910854A CN102794472A (en) | 2012-08-16 | 2012-08-16 | Method for processing large-diameter figure-eight-shaped hole series |
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| CN2012102910854A Pending CN102794472A (en) | 2012-08-16 | 2012-08-16 | Method for processing large-diameter figure-eight-shaped hole series |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112828642A (en) * | 2020-12-30 | 2021-05-25 | 航宇救生装备有限公司 | Hole positioning machining method for special-shaped part |
| CN113102804A (en) * | 2021-04-07 | 2021-07-13 | 常州宝菱重工机械有限公司 | Method for setting dislocation machining hole on reference positioning point |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201768934U (en) * | 2010-08-31 | 2011-03-23 | 河南森茂机械有限公司 | Large-sized vertical boring mill |
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2012
- 2012-08-16 CN CN2012102910854A patent/CN102794472A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201768934U (en) * | 2010-08-31 | 2011-03-23 | 河南森茂机械有限公司 | Large-sized vertical boring mill |
Non-Patent Citations (1)
| Title |
|---|
| 郭术义: "《金工实习》", 30 April 2011 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112828642A (en) * | 2020-12-30 | 2021-05-25 | 航宇救生装备有限公司 | Hole positioning machining method for special-shaped part |
| CN113102804A (en) * | 2021-04-07 | 2021-07-13 | 常州宝菱重工机械有限公司 | Method for setting dislocation machining hole on reference positioning point |
| CN113102804B (en) * | 2021-04-07 | 2022-05-17 | 常州宝菱重工机械有限公司 | Method for setting dislocation machining hole on reference positioning point |
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Application publication date: 20121128 |