CN104907766A - Group technology machining method of connecting rods - Google Patents
Group technology machining method of connecting rods Download PDFInfo
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- CN104907766A CN104907766A CN201410094620.6A CN201410094620A CN104907766A CN 104907766 A CN104907766 A CN 104907766A CN 201410094620 A CN201410094620 A CN 201410094620A CN 104907766 A CN104907766 A CN 104907766A
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- 238000000034 method Methods 0.000 title claims abstract description 61
- 238000003754 machining Methods 0.000 title claims abstract description 29
- 238000005516 engineering process Methods 0.000 title abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 42
- 238000003801 milling Methods 0.000 claims description 66
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 34
- 238000003672 processing method Methods 0.000 claims description 27
- 238000005553 drilling Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000002360 preparation method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/04—Connecting rods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a group technology machining method of connecting rods. The method comprises the steps that according to the connecting rods to be machined, the connecting rods are classified based on the same or similar appearance, and the unified locating reference of following machining is achieved; and the connecting rods comprising the same machining elements are arranged on the same machining equipment for machining, a corresponding group technology is selected for machining the connecting rods, furthermore, the appearance of the connecting rods to be machined is used as the unified locating reference, a workblank side face is subjected to finish machining, the size is controlled to be in the workblank tolerance range, and based on a workblank subjected to side face finish machining, a connecting rod machining clamp matched with the shape of the workblank subjected to side face finish machining is used for fixing. According to the method, large risks are avoided, technology debugging time is shortened, and the process design time and a large amount of energy of technologists are saved.
Description
Technical field
The invention belongs to the processing method of connecting rod, relate to a kind of GT processing method of connecting rod.
Background technology
In recent years, along with the demand in market, the diesel engine model that my company produces has multiple, and corresponding diesel engine connecting bar kind just has multiple, has obvious Multi-varieties and Small-batch Production feature in connecting rod production unit, and present technique can not meet the demand in market.
The similar of high-powered medium-speed diesel engines connecting rod, only has the difference of size.
The standard that connecting rod technique is in the past ununified, positioning datum is not identical, useful large and small head bore location, useful bolt hole location, location, useful side.The disunity of locate mode, causes the difference of process program, and final process route is different, and the lathe selected is relatively unfixing yet, and fixture is various in style especially.
And, this method technology preparation amount is very big, comprises the preparation of technique and technological equipment.For a new product, all start anew, the duplication of labour is more, the time and energy that originally can save are paid, and the manufacturing cycle of frock is longer, waste lot of materials and machining period, be difficult to adapt to fast-changing market demands, especially our factory product development dynamics is in recent years very large, by long-term work extra shifts or extra hours tired in reply technical preparation; The fixture of a large amount of similar takes up room in workshop greatly; When often kind of type connecting rod is produced, change a large amount of fixtures and adjustment lathe, the Operational preparation time is long.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of processing method, relates to a kind of GT processing method of connecting rod, in order to solve the problems of the technologies described above.
It is as follows that the present invention solves the problems of the technologies described above taked technical scheme:
A GT processing method for connecting rod, comprising:
According to the connecting rod that will process, based on identical or similar appearance, it is classified, as the unified positioning datum of following process;
The connecting rod comprising identical machining element is arranged on same equipment and processes, and select corresponding GT to process it, comprise further:
Using the profile of the connecting rod that will process as unified positioning datum, by the fine finishining of blank side, by size Control within the scope of stock allowance, and be fixed based on the processing Clamping Apparatus of Connecting Rod of the mating shapes of the blank after the blank after the fine finishining of side, utilization and the fine finishining of described side.
Preferably, the base jig body of described processing Clamping Apparatus of Connecting Rod is provided with multiple fixing hole, installs corresponding setting element or clamping element based on different blanks on the fixing hole of correspondence.
Preferably, the base jig of described Clamping Apparatus of Connecting Rod shares one.
Preferably, described GT processing method comprises: rule, rough mill both ends of the surface, finish-milling both ends of the surface, milling profile benchmark, drill centers, car profile, half right boring hole, cut formation shaft and bowl cover two parts;
To shaft part, furan face machining hole, drilling deep hole, milling oil groove are breathed out in milling; To bowl cover part, the boring of furan face, milling convex shoulder face, milling lock watt groove and oil groove are breathed out in milling.
Preferably, described GT processing method comprises:
Line, rough mill both ends of the surface, finish-milling both ends of the surface, milling profile benchmark, drill centers, car profile, half right boring hole, incision form shaft, bowl cover top, bowl cover bottom;
Shaft part: milling faying face machining hole, drilling deep hole, milling oil groove;
Bowl cover upper part: the boring of furan face, the boring of milling faying face, milling lock watt groove and oil groove are breathed out in milling;
Bowl cover low portion: the boring of furan face, milling convex shoulder face, milling lock watt groove and oil groove are breathed out in milling.
Preferably, also comprise: shaft and the rear method of bowl cover assembling, specifically comprise: assembling, the large and small head bore of right boring, the large and small head bore of honing.
After this invention takes such scheme, can, by procedure arrangement production scheduling plan in groups, just can greatly reduce because connecting rod kind frequently changes the required setting for machine time, reduce the Operational preparation time, and, because GT is standard technology, process program is ripe, for preparation new architecture connecting rod technique, efficiently, there is no large risk, decrease the process debugging time, saved technologist's technological design time and a large amount of energy.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from description, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write description, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in detail, to make above-mentioned advantage of the present invention definitely.Wherein,
Fig. 1 is the schematic diagram of the bar linkage structure embodiment that will process of the embodiment of the present invention;
Fig. 2 is the side schematic view of the bar linkage structure that will process of the embodiment of the present invention;
Fig. 3 is the schematic diagram of the bar linkage structure embodiment that will process of the embodiment of the present invention;
Fig. 4 is the side schematic view of the bar linkage structure that will process of the embodiment of the present invention;
Fig. 5 is the schematic diagram of the bar linkage structure embodiment that will process of the embodiment of the present invention;
Fig. 6 is the side schematic view of the bar linkage structure that will process of the embodiment of the present invention;
Fig. 7 is the base jig structure chart of the GT processing method of connecting rod;
Fig. 8 is the construction profile of the base jig of the GT processing method of connecting rod;
Fig. 9 is the another kind of clamp structure figure of the GT processing method of connecting rod;
Figure 10 is the another kind of clamp structure figure of the GT processing method of connecting rod
Figure 11 is the structural representation of the another kind of fixture of the GT processing method of connecting rod;
Figure 12 is the construction profile of the another kind of fixture of the GT processing method of connecting rod;
Figure 13 a-Figure 13 s is the process flow diagram of the GT processing method of connecting rod.
Detailed description of the invention
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
Specifically, the object of the invention is to overcome above-mentioned deficiency of the prior art, utilize group technology principle, the structure similar according to connecting rod, design process and modular fixture in groups.
As shown in Fig. 1 ~ 6, it is the structural representation of a connecting rod that will process of the embodiment of the present invention, wherein, in order to process above connecting rod, in the present embodiment, take connecting rod GT method, it is mainly made up of many group process, namely operation close to processing method, mounting means and setting for machine is integrated, design the group process being applicable to all Machining of Connecting Rod.
Specifically, it comprises: shaft 1001, bowl cover top 1002, bowl cover bottom 1003, side 1004, side 1005, faying face 1006, furan face 1007, Kazakhstan, side 1008, convex shoulder face 1009, end face 1010, bowl cover 1011.
Wherein, in order to overcome the too much problem of fixture of the prior art, in the present embodiment, in view of mounting means and the adjoining dimensions of different connecting rods, therefore, a kind of public fixture-modular fixture that can be used for group process is devised.
Only carry out a small amount of adjustment or change some element, modular fixture is just applicable to the installation of all connecting rods.Like this, as long as can procedure arrangement production scheduling plan be in groups pressed, just can greatly reduce the setting for machine time required for connecting rod variety renovation, reduce the Operational preparation time.
Specifically as shown in Figure 7, a kind of GT processing method of connecting rod, comprising:
According to the connecting rod that will process, based on identical or similar appearance, it is classified, as the unified positioning datum of following process;
The connecting rod comprising identical machining element is arranged on same equipment and processes, and select corresponding GT to process it, comprise further:
Using the profile of the connecting rod that will process as unified positioning datum, by the fine finishining of blank side, by size Control within the scope of stock allowance, and be fixed based on the processing Clamping Apparatus of Connecting Rod of the mating shapes of the blank after the blank after the fine finishining of side, utilization and the fine finishining of described side.
Preferably, the base jig body of described processing Clamping Apparatus of Connecting Rod is provided with multiple fixing hole, installs corresponding setting element or clamping element based on different blanks on the fixing hole of correspondence.
Preferably, the base jig of described Clamping Apparatus of Connecting Rod shares one.
Preferably, described GT processing method comprises: rule, rough mill both ends of the surface, finish-milling both ends of the surface, milling profile benchmark, drill centers, car profile, half right boring hole, cut formation shaft and bowl cover two parts;
To shaft part, furan face machining hole, drilling deep hole, milling oil groove are breathed out in milling; To bowl cover part, the boring of furan face, milling convex shoulder face, milling lock watt groove and oil groove are breathed out in milling.
Preferably, described GT processing method comprises:
Line, rough mill both ends of the surface, finish-milling both ends of the surface, milling profile benchmark, drill centers, car profile, half right boring hole, incision form shaft, bowl cover top, bowl cover bottom;
Shaft part: milling faying face machining hole, drilling deep hole, milling oil groove;
Bowl cover upper part: the boring of furan face, the boring of milling faying face, milling lock watt groove and oil groove are breathed out in milling;
Bowl cover low portion: the boring of furan face, milling convex shoulder face, milling lock watt groove and oil groove are breathed out in milling.
Preferably, also comprise: shaft and the rear method of bowl cover assembling, specifically comprise: assembling, the large and small head bore of right boring, the large and small head bore of honing.
After this invention takes such scheme, can, by procedure arrangement production scheduling plan in groups, just can greatly reduce because connecting rod kind frequently changes the required setting for machine time, reduce the Operational preparation time, and, because GT is standard technology, process program is ripe, for preparation new architecture connecting rod technique, efficiently, there is no large risk, decrease the process debugging time, saved technologist's technological design time and a large amount of energy.
That is, for connecting rod GT and connecting rod group process, be first solve unifying datum problem, we abandon original size head bore locate mode, select the profile of connecting rod as benchmark, and profile are black skins, irregular, more coarse, be not enough to as positioning datum.
For this reason, in an embodiment, by the fine finishining of blank side, by size Control within the scope of stock allowance, the requirement of strength reducing product is unlikely to.Positioning datum has just been unified, for follow-up work lays a solid foundation like this.
Specifically, as shown in Figure 13 a-Figure 13 s, GT flow process is made up of many group process, and brief overview is as follows:
------finish-milling both ends of the surface---------cut drill centers milling profile benchmark by car profile---half right boring hole---to rough mill both ends of the surface in line;
After incision, divide two parts for two-part connecting rod, and shaft and bowl cover two parts.
Shaft part: furan face machining hole---drilling deep hole---milling oil groove is breathed out in milling;
Bowl cover part: furan face boring---milling convex shoulder face---milling lock watt groove and oil groove are breathed out in milling;
After incision, divide three parts for syllogic connecting rod, and shaft, bowl cover top, bowl cover bottom three part.
Shaft part: milling faying face machining hole---drilling deep hole---milling oil groove;
Bowl cover upper part: furan face boring---boring of milling faying face---milling lock watt groove and oil groove are breathed out in milling;
Bowl cover low portion: furan face boring---milling convex shoulder face---milling lock watt groove and oil groove are breathed out in milling;
Shaft and the rear technique of bowl cover assembling: assembling---the large and small head bore of right boring---large and small head bore of honing.
Wherein, the machining sketch chart of bowl cover lower part after 13n-13p cuts, 13k ー 13m cut rear bar covers the machining sketch chart of part, 13g-13i cuts rear body section machining sketch chart, 13a-13f is schematic flow sheet before connecting rod cuts, because it is prior art, do not describe in detail at this.
In one embodiment, be described for modular fixture, as shown in Figure 2,3, 4, be the modular fixture of an embodiment, other are similar all with it, are not described in detail at this.
Specifically, mechanism illustrates: base jig is the part that all connecting rod cap lower clamp of processing share, and refers to accompanying drawing 7, and clamp body 1 effect is connecting machine tool workbench and workpiece to be machined, clamp body compresses on the table by tommyhead bolt and nut, is provided with keeper and compressing member above it.
Location-plate 2 makes with relatively hard materials, is used for bearing connecting rod lid, and upper plane is as the main locating surface in connecting rod cap bottom, and limiting rod lid three degree of freedom, location-plate is fixed on clamp body by housing screw 5 and alignment pin 6.
Location-plate 2 trailing flank is provided with pin 8 and screw 7, is used for installing locating piece, props up on the faying face of various type connecting rod cap bottom, two, the limiting rod lid bottom free degree.
In the side of location-plate 2, side locating piece is installed, props up on the side of various type connecting rod cap bottom, the one degree of freedom of limiting rod lid bottom.The six-freedom degree of connecting rod cap bottom is limited completely, belongs to and locating completely.Removable long nut 3 and removable tommyhead bolt 10 can move in the groove of location-plate 2, different size connecting rod cap bottom clamping demand can be met, moving long nut 3 hypomere is connected with removable tommyhead bolt, and in moving long nut 3 epimere, mounting stud is used for compressing connecting rod cap bottom.
Operation principle:
Install one and another clamp structure figure of I type and II type bowl cover bottom, it mainly aids in base jig.
See that miscellaneous small parts installed by accompanying drawing 8,9 and accompanying drawing 10,11,12 in base jig, and installed I type and II type connecting rod cap bottom, the large and small difference in amphitypy connecting rod cap bottom is obvious as can be seen from Figure.Principle is laid in connecting rod cap bottom:
Connecting rod cap lower end surface should be able to all contact with the location-plate in base jig, ensures not easily to produce distortion when compressing.Connecting rod cap lower shoulder face should exceed location-plate, leaves the space of withdrawing, is unlikely to be worked into location-plate and matrix.Connecting rod cap lower side is connected with alignment pin by screw with location-plate in base jig with rear locating piece 25 by side locating piece 21 with faying face, ensures that correct position is arranged in base jig at connecting rod cap bottom, is then compressed by connecting rod cap with pressing system.Pressing system center platen 22 is provided with packing ring 23, screw (not marking in figure), pressure head 28, connecting rod cap bottom is pressed on clamp body by clamp nut 26 and stud 27.
That is, the present invention utilizes group technology principle, according to the similar feature of workpiece, is arranged in by identical machining element on same equipment and processes, be designed to group process, form GT by many group process.Because fixture can according to different product designs, therefore, the present invention does not describe in detail at this.
Unified positioning datum: select the profile of connecting rod as benchmark, by the fine finishining of blank side, by size Control within the scope of stock allowance.
Effect of the present invention is as described by below:
(1) by procedure arrangement production scheduling plan in groups, just can greatly reduce because connecting rod kind frequently changes the required setting for machine time, reduce the Operational preparation time.
(2) GT is standard technology, and process program is ripe, for preparation new architecture connecting rod technique, is efficiently, does not have large risk, decrease the process debugging time, saved technologist's technological design time and a large amount of energy.
(3) for modular fixture, a Design and manufacture some location or clamping element, reduce designer's working time, saves manufacturing cost and shorten the manufacturing cycle, finally making the cycle time of developing new product.
(4) modular fixture structure is simple, and the scope of application is wide.
(5) metal material and man-hour is saved: saved the metal material and the machining period that manufacture base jig in modular fixture, production cost reduces.
(6) save parking space: the parking space originally needing many sleeve clamps, only need a sleeve clamp parking space now, greatly save parking space.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.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 (6)
1. a GT processing method for connecting rod, is characterized in that, comprising:
According to the connecting rod that will process, based on identical or similar appearance, it is classified, as the unified positioning datum of following process;
The connecting rod comprising identical machining element is arranged on same equipment and processes, and select corresponding GT to process it, comprise further:
Using the profile of the connecting rod that will process as unified positioning datum, by the fine finishining of blank side, by size Control within the scope of stock allowance, and be fixed based on the processing Clamping Apparatus of Connecting Rod of the mating shapes of the blank after the blank after the fine finishining of side, utilization and the fine finishining of described side.
2. the GT processing method of connecting rod according to claim 1, is characterized in that, the base jig body of described processing Clamping Apparatus of Connecting Rod is provided with multiple fixing hole, installs corresponding setting element or clamping element based on different blanks on the fixing hole of correspondence.
3. the GT processing method of connecting rod according to claim 1 and 2, is characterized in that, the base jig of described Clamping Apparatus of Connecting Rod shares one.
4. the GT processing method of connecting rod according to claim 1, it is characterized in that, described GT processing method comprises: rule, rough mill both ends of the surface, finish-milling both ends of the surface, milling profile benchmark, drill centers, car profile, half right boring hole, cut formation shaft and bowl cover two parts;
To shaft part, furan face machining hole, drilling deep hole, milling oil groove are breathed out in milling; To bowl cover part, the boring of furan face, milling convex shoulder face, milling lock watt groove and oil groove are breathed out in milling.
5. the GT processing method of connecting rod according to claim 1, is characterized in that, described GT processing method comprises:
Line, rough mill both ends of the surface, finish-milling both ends of the surface, milling profile benchmark, drill centers, car profile, half right boring hole, incision form shaft, bowl cover top, bowl cover bottom;
Shaft part: milling faying face machining hole, drilling deep hole, milling oil groove;
Bowl cover upper part: the boring of furan face, the boring of milling faying face, milling lock watt groove and oil groove are breathed out in milling;
Bowl cover low portion: the boring of furan face, milling convex shoulder face, milling lock watt groove and oil groove are breathed out in milling.
6. the GT processing method of the connecting rod according to claim 4 or 5, is characterized in that, also comprise: shaft and the rear method of bowl cover assembling, specifically comprise: assembling, the large and small head bore of right boring, the large and small head bore of honing.
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CN201410094620.6A CN104907766B (en) | 2014-03-15 | 2014-03-15 | A kind of GT processing method of connecting rod |
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CN201410094620.6A CN104907766B (en) | 2014-03-15 | 2014-03-15 | A kind of GT processing method of connecting rod |
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CN104907766B CN104907766B (en) | 2017-08-01 |
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Cited By (4)
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---|---|---|---|---|
CN105728772A (en) * | 2016-05-13 | 2016-07-06 | 陕西柴油机重工有限公司 | Method for machining high-position-precision deep hole in connection rod of diesel engine |
CN107263106A (en) * | 2017-05-31 | 2017-10-20 | 安庆中船动力配套有限公司 | A kind of engine link system of processing |
CN107350739A (en) * | 2017-05-31 | 2017-11-17 | 安庆中船动力配套有限公司 | A kind of processing method of engine connecting rod |
CN110977342A (en) * | 2019-11-29 | 2020-04-10 | 安庆中船动力配套有限公司 | Split machining process for connecting rod |
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CN203317084U (en) * | 2013-07-10 | 2013-12-04 | 陕西柴油机重工有限公司 | Base clamp for connecting rod cover |
CN203437962U (en) * | 2013-09-06 | 2014-02-19 | 陕西柴油机重工有限公司 | Clamp for machining connecting rod cap |
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US4198879A (en) * | 1977-11-14 | 1980-04-22 | Calnetics Corporation | Method for the manufacture of connecting rods for small reciprocating engines |
JPS59205238A (en) * | 1983-05-06 | 1984-11-20 | Toyota Motor Corp | Manufacture of connecting rod |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105728772A (en) * | 2016-05-13 | 2016-07-06 | 陕西柴油机重工有限公司 | Method for machining high-position-precision deep hole in connection rod of diesel engine |
CN107263106A (en) * | 2017-05-31 | 2017-10-20 | 安庆中船动力配套有限公司 | A kind of engine link system of processing |
CN107350739A (en) * | 2017-05-31 | 2017-11-17 | 安庆中船动力配套有限公司 | A kind of processing method of engine connecting rod |
CN107263106B (en) * | 2017-05-31 | 2019-03-01 | 安庆中船动力配套有限公司 | A kind of engine link system of processing |
CN110977342A (en) * | 2019-11-29 | 2020-04-10 | 安庆中船动力配套有限公司 | Split machining process for connecting rod |
CN110977342B (en) * | 2019-11-29 | 2021-08-03 | 安庆中船动力配套有限公司 | Split machining process for connecting rod |
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