CN102528110A - Method for machining central oil hole of main journal of crank of medium-speed engine - Google Patents
Method for machining central oil hole of main journal of crank of medium-speed engine Download PDFInfo
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- CN102528110A CN102528110A CN2011101888098A CN201110188809A CN102528110A CN 102528110 A CN102528110 A CN 102528110A CN 2011101888098 A CN2011101888098 A CN 2011101888098A CN 201110188809 A CN201110188809 A CN 201110188809A CN 102528110 A CN102528110 A CN 102528110A
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- 238000000034 method Methods 0.000 title abstract description 8
- 238000003754 machining Methods 0.000 title abstract description 5
- 238000005553 drilling Methods 0.000 claims abstract description 32
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000003672 processing method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The invention relates to a method for machining a central oil hole of a main journal of a crank of a medium-speed engine. The method comprises the following steps of: drilling the central oil hole of the main journal before the surface of the crank is quenched, boring the central oil hole of the main journal, drilling the central oil hole of the main journal through a drill jig tool, fixing a reference V-shaped block and a clamping V-shaped block of the drill jig tool and bolts on the main journal, requiring that the center of the drill jig and the center of the main journal are overlapped, arranging a parabolic bit on a drill stem, drilling through the oil hole of the main journal under the guide of a drill jig, and boring the central oil hole of the main journal on a deep-hole drilling-boring machine HZZ1, wherein the boring head is a general boring head and is in threaded connection with a connecting rod; the connecting rod is clamped on a boring rod of the machine tool; and when the boring head enters a certain main journal required to be bored, the connecting rod plays a role in supporting another main journal, and the boring of central through hole of the main journal is divided into heavy boring, fine boring and root R boring. By the method, the product quality can be guaranteed, and the production efficiency can be greatly improved.
Description
Technical field
The present invention relates to the machining process of a kind of medium seed diesel engine main bearing journal center oilhole.
Background technology
Bent axle belongs to key component in diesel engine; Be that a kind of contour structures is complicated, the relatively poor thin and long units of rigidity, by a plurality of parts, comprise trunnion, crank journal, crank arm, trunnion center oilhole, straight oilhole, inclined oil hole of air; Quality and accuracy class require high, are easy to distortion in the processing.Oilhole is the pith of bent axle whole lubricating system, and the oil groove of oilhole is the necessary condition of oil circuit sealing.Therefore, can the fine finishining of crankshaft oil hole be related to the length that run well after bent axle is installed with service life.
In all oilholes, owner journal centre oilhole difficulty of processing is maximum, and the center oil hole length of trunnion as shown in Figure 5 is long; Trunnion through whole bent axle; Again because of its its for discontinuity distributes, with plain shaft class deep hole machining tangible difference is arranged, drill bit is difficult in each place, segmentation oilhole aperture centering in the process; Can't process with general deep hole drill, boring head, be a difficult problem that never ran in the applicant's machined.
Summary of the invention
The objective of the invention is to above-mentioned present situation, aim to provide and a kind ofly can guarantee product quality, the processing method of the middling speed machine crankshaft trunnion center oilhole that production efficiency is high.
The implementation of the object of the invention is that the processing method of middling speed machine crankshaft trunnion center oilhole is bored trunnion center oilhole, boring trunnion center oilhole after surface hardening before the bent axle surface hardening;
Bore trunnion center oilhole with the drill jig frock, the clamping V-block of drill jig frock is through being bolted on the benchmark V-block, and model drilling body is connected as a single entity through coupling bar and benchmark V-block, and drill jig cover, lightening core are arranged on the model drilling body;
Bore trunnion center oilhole:
With the benchmark V-block of drill jig frock, clamp V-block and be bolted on the trunnion; Then the drill jig cover is put into model drilling body, again through coupling bar with model drilling body and benchmark V-block be linked together, tighten the nut of coupling bar at last; Two screw centre-to-centre spacing N of benchmark V-block need identical with two screw centre-to-centre spacing N of model drilling body; Benchmark V-block and clamping V-block are after clamping on the trunnion, and the high H in its center should be identical with the high H in model drilling body center, and the center of drill jig is overlapped with the trunnion center;
Dress parabola drill bit on the drilling rod, the guiding through drill jig drills through the trunnion oilhole;
Boring trunnion center oilhole:
Boring trunnion center oilhole is at deep hole drilling and boring machine H
ZZ
1On carry out, clamping is consistent during with drilling, with the trunnion centering; Error≤0.1, boring head adopts general boring head, boring head and extension bar thread connection; The extension bar clamping is on the lathe boring bar, and when boring head got into certain trunnion that needs boring, extension bar play supporting role in another trunnion;
Boring trunnion central through hole is divided into heavy boring and right boring and root R boring, and during right boring, the unsteady cutter of sharp knife band during boring root R fillet, becomes fillet R with the reconditioning of plate shape drill bit on the boring head, and clamping is on boring head, and the unsteady cutter right boring of band.
Adopt the present invention can guarantee product quality, can greatly enhance productivity again.
Description of drawings
Drill jig tool structure sketch map when Fig. 1 is the machining center oilhole,
Fig. 2 is drill jig center and trunnion centres sketch map,
Fig. 3 is model drilling body center and trunnion centres sketch map,
Fig. 4 is the sketch map of drill jig clamping on main bearing journal,
Fig. 5 is a medium seed diesel engine main bearing journal center oilhole sketch map,
Fig. 6 is the X5 part enlarged diagram among Fig. 5.
The specific embodiment
The present invention is detailed with reference to the accompanying drawings.
With reference to Fig. 1, the clamping V-block 6 of the drill jig frock during the machining center oilhole is fixed on the benchmark V-block 5 through bolt 7, and model drilling body 1 is connected as a single entity through coupling bar 4 and benchmark V-block 5, and drill jig cover 2, lightening core 3 are arranged on the model drilling body 1.
The present invention bores trunnion center oilhole before the bent axle surface hardening, boring trunnion center oilhole after surface hardening.Its reason is that surface hardening has the depth of hardening zone requirement; Cutting stress during simultaneously for minimizing fine finishining; What the whole allowance of bent axle stayed after the surface hardening is less; Can produce big stress and bore trunnion center oilhole, be prone to cause distortion, carry out before trunnion center oilhole is arranged in the bent axle surface hardening so bore.
Subdrilling trunnion center oilhole.
Benchmark V-block 5, clamping V-block 6 and the bolt 7 of drill jig frock are fixed on the trunnion 8, then drill jig cover 2 are put into model drilling body 1, through coupling bar 4 model drilling body and benchmark V-block 5 are connected together again, tighten the nut of coupling bar at last.
With reference to Fig. 2,3,4,5; The centre-to-centre spacing N of two screws 9 of benchmark V-block 5 needs identical with two screw centre-to-centre spacing N of model drilling body 1; Benchmark V-block and clamping V-block are after clamping on the trunnion, and the high H in its center should be identical with the high H in model drilling body center, and the center of drill jig is overlapped with the trunnion center; Like this, just can play the centering effect.
The parabola drill bit is connected on the drilling rod, and the guiding through model drilling body is with the trunnion oil-hole drill
Logical.During boring, note following some:
1) drill bit is selected lengthening parabola drill bit for use, is characterized in that the chip removal performance is good, and stability is high;
2) in the process, drill bit does not change, and workpiece is done main motion, and the distance that each feeding depth is confirmed is filled up the drill bit chip pocket with smear metal and is as the criterion, and carries out the withdrawing chip removal;
3) in the process, cooling is wanted fully; Fault is arranged, in time withdraw from drill bit, so as not to the drill bit that fractures, the scratch endoporus;
4) every brill draws the hole with drill jig for one section, draws resleeve supports drill rods behind the hole.
Boring trunnion center oilhole:
Boring trunnion center oilhole is at deep hole drilling and boring machine H
ZZ
1On carry out, a terminal drum shape chuck clamping, an end supports with centre frame, be to guarantee the bent axle machining accuracy, middle trunnion place can add carriage.Clamping is consistent during with drilling, with the trunnion centering, and error≤0.1.
Boring head adopts general boring head.Because of the trunnion oilhole has the discontinuity characteristic, in order to guarantee the smooth completion of boring, the ad hoc extension bar of having counted.It is close that extension bar length and crank web leave grade L (see figure 4), is bumped into wooden bar around the two ends.After boring head and the extension bar thread connection, on the lathe boring bar, when boring head got into certain trunnion that needs boring, extension bar can play the effect of supporting in another trunnion with the extension bar clamping, guaranteed the linearity requirement in hole.
Boring trunnion central through hole is divided into heavy boring, right boring and root R boring.
During heavy boring, workpiece is selected suitable rotating speed, and sharp knife on the boring head is selected suitable feed.
During right boring, workpiece is selected suitable rotating speed, and the unsteady cutter of sharp knife band is selected suitable feed, and suitably adjusted feed according to roughness on the boring head.
During boring crankshaft center oilhole root R fillet X5 (see figure 6), the reconditioning of plate shape drill bit is become fillet R, clamping is on boring head, and the unsteady cutter right boring of band, adds and notes increasing wood key, drill jig supporting man-hour, prevents vibration.
Claims (2)
1. the processing method of middling speed machine crankshaft trunnion center oilhole is characterized in that before the bent axle surface hardening, boring trunnion center oilhole, boring trunnion center oilhole after surface hardening;
Bore trunnion center oilhole with the drill jig frock, the clamping V-block of drill jig frock is through being bolted on the benchmark V-block, and model drilling body is connected as a single entity through coupling bar and benchmark V-block, and drill jig cover, lightening core are arranged on the model drilling body;
Bore trunnion center oilhole:
With the benchmark V-block of drill jig frock, clamp V-block and be bolted on the trunnion; Then the drill jig cover is put into model drilling body, again through coupling bar with model drilling body and benchmark V-block be linked together, tighten the nut of coupling bar at last; Two screw centre-to-centre spacing N of benchmark V-block need identical with two screw centre-to-centre spacing N of model drilling body; Benchmark V-block and clamping V-block are after clamping on the trunnion, and the high H in its center should be identical with the high H in model drilling body center, and the center of drill jig is overlapped with the trunnion center;
Dress parabola drill bit on the drilling rod, the guiding through drill jig drills through the trunnion oilhole;
Boring trunnion center oilhole:
Boring trunnion center oilhole is at deep hole drilling and boring machine H
ZZ
1On carry out, clamping is consistent during with drilling, with the trunnion centering; Error≤0.1, boring head adopts general boring head, boring head and extension bar thread connection; The extension bar clamping is on the lathe boring bar, and when boring head got into certain trunnion that needs boring, extension bar play supporting role in another trunnion;
Boring trunnion central through hole is divided into heavy boring and right boring and root R boring, and during right boring, the unsteady cutter of sharp knife band during boring root R fillet, becomes fillet R with the reconditioning of plate shape drill bit on the boring head, and clamping is on boring head, and the unsteady cutter right boring of band.
2. the processing method of middling speed machine crankshaft trunnion according to claim 1 center oilhole, it is close to it is characterized in that extension bar length and crank web leave grade L, is bumped into wooden bar around the two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101888098A CN102528110B (en) | 2011-07-01 | 2011-07-01 | Method for machining central oil hole of main journal of crank of medium-speed engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101888098A CN102528110B (en) | 2011-07-01 | 2011-07-01 | Method for machining central oil hole of main journal of crank of medium-speed engine |
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| Publication Number | Publication Date |
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| CN102528110A true CN102528110A (en) | 2012-07-04 |
| CN102528110B CN102528110B (en) | 2013-11-20 |
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| CN2011101888098A Active CN102528110B (en) | 2011-07-01 | 2011-07-01 | Method for machining central oil hole of main journal of crank of medium-speed engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735389A (en) * | 2017-01-06 | 2017-05-31 | 芜湖瑞思机器人有限公司 | Improve the equipment and its boring method of high speed parallel robot slave arm borehole accuracy |
| CN107160206A (en) * | 2017-07-14 | 2017-09-15 | 辽宁五八内燃机配件有限公司 | Main bearing journal machining of oil hole fixture |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0852642A (en) * | 1994-08-09 | 1996-02-27 | Daihatsu Motor Co Ltd | Unbalance correcting device for crankshaft |
| DE19938856A1 (en) * | 1999-08-17 | 2001-02-22 | Tiefbohrtechnik Gmbh Tbt | Deep drilling equipment |
| CN2600640Y (en) * | 2002-03-25 | 2004-01-21 | 武汉重工铸锻有限责任公司 | MTU 20V956TB92 diesel engine crankshaft assembly |
| CN101670526A (en) * | 2008-09-12 | 2010-03-17 | 天润曲轴股份有限公司 | A jig for drilling crankshaft flange holes |
| EP2308622A1 (en) * | 2008-07-30 | 2011-04-13 | Komatsu Machinery Corporation | Device and method for boring center hole of crankshaft |
| CN102091812A (en) * | 2010-12-28 | 2011-06-15 | 通裕重工股份有限公司 | Processing technique for heavy crankshaft and shaft part milling frame stations and technique equipment |
-
2011
- 2011-07-01 CN CN2011101888098A patent/CN102528110B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0852642A (en) * | 1994-08-09 | 1996-02-27 | Daihatsu Motor Co Ltd | Unbalance correcting device for crankshaft |
| DE19938856A1 (en) * | 1999-08-17 | 2001-02-22 | Tiefbohrtechnik Gmbh Tbt | Deep drilling equipment |
| CN2600640Y (en) * | 2002-03-25 | 2004-01-21 | 武汉重工铸锻有限责任公司 | MTU 20V956TB92 diesel engine crankshaft assembly |
| EP2308622A1 (en) * | 2008-07-30 | 2011-04-13 | Komatsu Machinery Corporation | Device and method for boring center hole of crankshaft |
| CN101670526A (en) * | 2008-09-12 | 2010-03-17 | 天润曲轴股份有限公司 | A jig for drilling crankshaft flange holes |
| CN102091812A (en) * | 2010-12-28 | 2011-06-15 | 通裕重工股份有限公司 | Processing technique for heavy crankshaft and shaft part milling frame stations and technique equipment |
Non-Patent Citations (2)
| Title |
|---|
| 李海国: "钻曲轴法兰盘端面孔可调夹具", 《山东农机》 * |
| 段绍林登: "曲轴机加工工艺与设备现状及发展趋势", 《内燃机》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735389A (en) * | 2017-01-06 | 2017-05-31 | 芜湖瑞思机器人有限公司 | Improve the equipment and its boring method of high speed parallel robot slave arm borehole accuracy |
| CN106735389B (en) * | 2017-01-06 | 2019-03-08 | 芜湖瑞思机器人有限公司 | Improve the equipment and its boring method of high speed parallel robot slave arm borehole accuracy |
| CN107160206A (en) * | 2017-07-14 | 2017-09-15 | 辽宁五八内燃机配件有限公司 | Main bearing journal machining of oil hole fixture |
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| CN102528110B (en) | 2013-11-20 |
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