CN104117704A - Method of machining of cam shaft holes of rack of marine diesel engine - Google Patents
Method of machining of cam shaft holes of rack of marine diesel engine Download PDFInfo
- Publication number
- CN104117704A CN104117704A CN201410333937.0A CN201410333937A CN104117704A CN 104117704 A CN104117704 A CN 104117704A CN 201410333937 A CN201410333937 A CN 201410333937A CN 104117704 A CN104117704 A CN 104117704A
- Authority
- CN
- China
- Prior art keywords
- hole
- boring
- cam shaft
- camshaft
- bore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2215/00—Details of workpieces
- B23B2215/16—Camshafts
Abstract
The invention discloses a method for machining cam shaft holes of a rack of a marine diesel engine. The cam shaft holes comprise the cam shaft hole which is difficult to bore smoothly, a normal gap exists between one side of the cam shaft hole which is difficult to bore smoothly and the adjacent cam shaft hole, a narrow gap exists between the other side of the cam shaft hole which is difficult to bore smoothly and the adjacent cam shaft hole, and a boring tool can not enter the narrow gap. The method for machining the cam shaft holes of the rack of the marine diesel engine is characterized in that a pre-bored hole with a diameter small than a design diameter is firstly bored in the adjacent cam shaft hole separated from the cam shaft hole difficult to bore smoothly by the normal interval, a step hole with a diameter slight larger than that of the pre-bored hole and still small than the design diameter is bored reversely, then the center deviation between the pre-bored hole and the step hole is measured through a dial indicator, centre zero position correction of the boring tool used for reverse boring is conducted, and finally the rest of the cam shaft holes are bored reversely so that the shaft holes can be in the design size. According to the method for machining the cam shaft holes of the rack of the marine diesel engine, the coaxiality between smoothly-bored holes and the reversely-bored holes is guaranteed, and the cam shaft hole machining accuracy is improved; the machining time is shortened, and machining efficiency is improved.
Description
Technical field
The present invention relates to the processing of marine diesel, particularly a kind of processing method of marine diesel frame camshaft hole, belongs to Diesel Engine Technique Field.
Background technology
The frame of in-line arrangement medium speed engine type marine diesel structurally has many differences with V-type middling speed frame.In the processing of this in-line arrangement medium speed engine type, one of difficult point that the processing of camshaft hole is the most difficult beyond doubt.Frame total length 5730mm (taking 9 cylinder machines as example), 11 grades of both sides camshaft hole altogether, camshaft hole total length axiality requires as 0.10mm, and adjacent two grades of hole axialities require as 0.05mm; Main bearing hole and both sides camshaft hole axiality require in 0.10mm, and camshaft hole internal arm is less, and fuel cam place has one grade of camshaft hole length longer, are about 220mm.
Because this type camshaft hole is near both ends of the surface, refer to Fig. 1, and wherein to open shelves smaller for the second camshaft hole 12 and the first camshaft hole 11 of end face, cause the annex of NC boring machine to install cannot putting in out shelves after boring cutter 2 processing, so the boring processing method of existing camshaft hole is, along the anti-boring of carrying out again the second camshaft hole 12 after the good all camshaft holes of boring, general anti-boring method is, first draw adjacent manufactured the 3rd camshaft hole 13 is proofreaied and correct to just zero setting with dial gauge 3, and then use clearance gauge, the instruments such as chalk dust are accurately borrowed zero-bit again, finally use anti-boring second camshaft hole 12 of boring cutter 2 of accurate tool setting, but this kind of old-fashioned processing method can produce following processing problems:
1, measure and precisely do not cause axiality not ensure
While using two adjacent holes of existing method processing apart from each other, we must be on the 3rd camshaft hole 13 that boring is good just set zero-bit to carry out first anti-boring after (seeing Fig. 1), again get back on the second camshaft hole 12, reusing dial gauge and pull out anti-bore hole and the offset dimensions in the good hole of boring, borrow zero-bit is processed.This method is in the time measuring the axiality in the short hole that adjacent width far away is less, because the error of measurement itself can have impact to measuring axiality, thereby produce apart from amplification, cause producing error in borrowing zero-bit process, cannot ensure the axiality in two holes.
2, operator is wasted time and energy
In the process of existing processing method, operating personnel need to draw the offset dimensions to two grades of camshaft hole centers repeatedly, Jie Dui center, and such operation all too is wasted time and energy, and in repeatedly drawing data, probably can produce mistake.
Summary of the invention
The object of the invention is to overcome the deficiency that above-mentioned prior art exists, a kind of processing method of marine diesel frame camshaft hole is provided, by one along boring not to the anti-shoulder lattice that bore on the camshaft hole of size, use afterwards dial gauge just to borrow, the complete remaining camshaft hole of boring again, thereby solve the unwarrantable problem of axiality, improve machining accuracy, reduce operating personnel and repeatedly work.
The technical scheme that the present invention solves its technical problem is as follows:
A kind of processing method of marine diesel frame camshaft hole, this camshaft hole includes the camshaft hole being difficult to along boring, this is difficult to have normal interval along camshaft hole one side and the adjacent cams axis hole of boring, opposite side and adjacent cams axis hole have the unapproachable narrow interval of boring cutter, it is characterized in that, have on the adjacent cams axis hole of normal interval first along the pre-bore hole that bores diameter and do not reach design size with the described camshaft hole being difficult to along boring, again counter bore more bigger and do not reach yet the stepped hole of design size than this pre-bore diameter, use afterwards dial gauge to measure the centre deviation of this pre-bore hole and this stepped hole, carry out the center zero correction of anti-boring boring cutter, the remaining camshaft hole of last anti-boring reaches design size.
Further, the concrete steps of described processing method are as follows:
1) adopt the diameter boring cutter less than camshaft hole design size, on the adjacent cams axis hole of the described camshaft hole that is difficult to suitable boring, process pre-bore hole by suitable boring mode, this pre-bore diameter does not reach design size, this adjacent cams axis hole and described in be difficult to along thering is the normal interval that can enter described boring cutter between the camshaft hole of boring;
2) machine tool accessories turns to anti-boring position, adopts the boring cutter that diameter is larger to process stepped hole by anti-boring mode after the zero-bit of calibrated center on pre-bore hole, and the diameter of this stepped hole is greater than described pre-bore hole and is less than camshaft hole design size;
3) use dial gauge to measure the described stepped hole of anti-boring and the centre deviation of the described pre-bore hole of suitable boring, and carry out the correction of boring cutter center zero-bit, the larger stepped hole of anti-boring again, correction center zero-bit again afterwards, until stepped hole is less than 0.02mm with the centre deviation of pre-bore hole, be defined as the boring cutter center zero-bit of anti-boring processing;
4) with step 3) the boring cutter center zero-bit of the anti-boring processing determined is as the criterion, and the anti-boring that completes residue camshaft hole is processed and is reached design size.
Further, described step 2) in the degree of depth of stepped hole be 20mm.
Compared with prior art, the present invention has following beneficial effect:
1, guaranteed the axiality of suitable bore hole and anti-bore hole
When the present invention carries out anti-boring cent(e)ring, the pre-bore hole of measuring center deviation and stepped hole are in same camshaft hole, and pre-bore hole is to process along boring, its center has represented all centers along bore hole, stepped hole is that anti-boring processes, its center has represented the center of all anti-bore holes, thereby the mode of carrying out like this center zero correction on same camshaft hole has been avoided the measure error because correction center causes on two different camshaft holes of apart from each other, thereby ensure the axiality of suitable bore hole and anti-bore hole, improve the machining accuracy of camshaft hole.
2, operate short and sweetly, avoid operate miss
Due to the present invention's data acquisition on same camshaft hole, so data acquisition is easier, avoid the data acquisition mistake that correct operation may cause repeatedly between different camshaft holes, also reduced operating personnel works repeatedly, save process time, thereby improved working (machining) efficiency.
Brief description of the drawings
Fig. 1 is the schematic diagram of existing processing method.
Fig. 2 is schematic diagram of the present invention.
Fig. 3 is the A portion enlarged drawing of Fig. 2.
Detailed description of the invention
Further illustrate by the following examples and by reference to the accompanying drawings the processing method of marine diesel frame camshaft hole of the present invention, but can not limit the scope of the invention with this.
Refer to Fig. 2, processing method of the present invention is for the processing of marine diesel frame camshaft hole, this marine diesel frame 1 has some coaxial camshaft holes, comprising there being the camshaft hole 12 being difficult to along boring, this is difficult to be respectively adjacent cams axis hole 11 and 13 along the both sides of the camshaft hole 12 of boring, this is difficult to have the normal interval that can enter described boring cutter 2 along between the camshaft hole 12 of boring the adjacent cams axis hole 13 of one side, the adjacent cams axis hole 11 of opposite side and this are difficult to have the unapproachable narrow interval of boring cutter 2 along between the camshaft hole 12 of boring, therefore this is difficult to cannot adopt along boring mode and process along the camshaft hole 12 of boring, and can only adopt anti-boring mode to process.The processing method of described marine diesel frame camshaft hole is, have on the adjacent cams axis hole 13 of normal interval first along the pre-bore hole 12 ' that bores diameter and do not reach design size with the described camshaft hole 12 being difficult to along boring, refer to Fig. 3, the anti-stepped hole 12 that does not reach yet design size than this pre-bore hole 12 ' slightly larger in diameter that bores again "; use afterwards dial gauge 3 to measure this pre-bore hole 12 ' and this stepped hole 12 " centre deviation, carry out the center zero correction of anti-boring boring cutter 2, the remaining camshaft hole of last anti-boring reaches design size.
The concrete steps of described processing method are as follows:
1) refer to Fig. 3, adopt the diameter boring cutter 2 less than camshaft hole design size, on the adjacent cams axis hole 13 of the described camshaft hole 12 that is difficult to suitable boring, process pre-bore hole 12 ' by suitable boring mode, this pre-bore hole 12 ' diameter does not reach layout design size, this adjacent cams axis hole 13 and described in be difficult to along thering is the normal interval that can enter described boring cutter 2 between the camshaft hole 12 of boring.
2) machine tool accessories turns to anti-boring position, carrying out center zero-bit slightly proofreaies and correct, adopt the larger boring cutter 2 of diameter to process stepped hole 12 by anti-boring mode pre-bore hole 12 ' is upper "; this stepped hole 12 " diameter be greater than described pre-bore hole 12 ' and be less than camshaft hole design size, stepped hole 12 " the degree of depth be 20mm.
3) use dial gauge 3 around to measure the described stepped hole 12 of anti-boring on four direction along camshaft hole " with the centre deviation of the described pre-bore hole 12 ' along boring; and carry out the correction of boring cutter center zero-bit; the larger stepped hole of anti-boring again; correction center zero-bit again afterwards; until stepped hole 12 " be less than 0.02mm with the centre deviation of pre-bore hole 12 ', it is defined as to the boring cutter center zero-bit of anti-boring processing.
4) referring to Fig. 2, with step 3) the boring cutter center zero-bit of the anti-boring processing determined is as the criterion, and the anti-boring that completes residue camshaft hole is processed and is reached design size.
Claims (3)
1. the processing method of a marine diesel frame camshaft hole, this camshaft hole includes the camshaft hole being difficult to along boring, this is difficult to have normal interval along camshaft hole one side and the adjacent cams axis hole of boring, opposite side and adjacent cams axis hole have the unapproachable narrow interval of boring cutter, it is characterized in that, have on the adjacent cams axis hole of normal interval first along the pre-bore hole that bores diameter and do not reach design size with the described camshaft hole being difficult to along boring, again counter bore more bigger and do not reach yet the stepped hole of design size than this pre-bore diameter, use afterwards dial gauge to measure the centre deviation of this pre-bore hole and this stepped hole, carry out the center zero correction of anti-boring boring cutter, the remaining camshaft hole of last anti-boring reaches design size.
2. the processing method of marine diesel frame camshaft hole according to claim 1, is characterized in that, the concrete steps of described processing method are as follows:
1) adopt the diameter boring cutter less than camshaft hole design size, on the adjacent cams axis hole of the described camshaft hole that is difficult to suitable boring, process pre-bore hole by suitable boring mode, this pre-bore diameter does not reach design size, this adjacent cams axis hole and described in be difficult to along thering is the normal interval that can enter described boring cutter between the camshaft hole of boring;
2) machine tool accessories turns to anti-boring position, adopts the boring cutter that diameter is larger to process stepped hole by anti-boring mode after the zero-bit of calibrated center on pre-bore hole, and the diameter of this stepped hole is greater than described pre-bore hole and is less than camshaft hole design size;
3) use dial gauge to measure the described stepped hole of anti-boring and the centre deviation of the described pre-bore hole of suitable boring, and carry out the correction of boring cutter center zero-bit, the larger stepped hole of anti-boring again, correction center zero-bit again afterwards, until stepped hole is less than 0.02mm with the centre deviation of pre-bore hole, be defined as the boring cutter center zero-bit of anti-boring processing;
4) with step 3) the boring cutter center zero-bit of the anti-boring processing determined is as the criterion, and the anti-boring that completes residue camshaft hole is processed and is reached design size.
3. the processing method of marine diesel frame camshaft hole according to claim 2, is characterized in that described step 2) in the degree of depth of stepped hole be 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333937.0A CN104117704B (en) | 2014-07-14 | A kind of processing method of marine diesel frame camshaft hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333937.0A CN104117704B (en) | 2014-07-14 | A kind of processing method of marine diesel frame camshaft hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104117704A true CN104117704A (en) | 2014-10-29 |
| CN104117704B CN104117704B (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598501A (en) * | 2016-03-31 | 2016-05-25 | 国营第六一六厂 | Converse boring processing device for intermittent deep hole |
| CN104722794B (en) * | 2014-12-17 | 2017-03-01 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of precise processing device of high position degree end face |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5209615A (en) * | 1992-04-14 | 1993-05-11 | Sunnen Products Company | Boring bar support means |
| JP2011194541A (en) * | 2010-03-23 | 2011-10-06 | Mitsubishi Materials Corp | Hole-machining method by reamer |
| CN102744435A (en) * | 2012-07-25 | 2012-10-24 | 江西昌河汽车有限责任公司 | Rear-guide type aluminum alloy cylinder cover cam shaft hole finish-boring process |
| CN103372663A (en) * | 2012-04-24 | 2013-10-30 | 安徽华菱汽车有限公司 | Device and method for processing camshaft holes of cylinder cover of diesel engine |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5209615A (en) * | 1992-04-14 | 1993-05-11 | Sunnen Products Company | Boring bar support means |
| JP2011194541A (en) * | 2010-03-23 | 2011-10-06 | Mitsubishi Materials Corp | Hole-machining method by reamer |
| CN103372663A (en) * | 2012-04-24 | 2013-10-30 | 安徽华菱汽车有限公司 | Device and method for processing camshaft holes of cylinder cover of diesel engine |
| CN102744435A (en) * | 2012-07-25 | 2012-10-24 | 江西昌河汽车有限责任公司 | Rear-guide type aluminum alloy cylinder cover cam shaft hole finish-boring process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722794B (en) * | 2014-12-17 | 2017-03-01 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of precise processing device of high position degree end face |
| CN105598501A (en) * | 2016-03-31 | 2016-05-25 | 国营第六一六厂 | Converse boring processing device for intermittent deep hole |
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