CN103495847B - Machining of Connecting Rod technique - Google Patents

Machining of Connecting Rod technique Download PDF

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Publication number
CN103495847B
CN103495847B CN201310487357.2A CN201310487357A CN103495847B CN 103495847 B CN103495847 B CN 103495847B CN 201310487357 A CN201310487357 A CN 201310487357A CN 103495847 B CN103495847 B CN 103495847B
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China
Prior art keywords
rod
stage
stomidium
stub
little head
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CN201310487357.2A
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Chinese (zh)
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CN103495847A (en
Inventor
黄荣
谭哲宝
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青岛肯拉铎机械有限公司
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Priority to CN201310487357.2A priority Critical patent/CN103495847B/en
Publication of CN103495847A publication Critical patent/CN103495847A/en
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Publication of CN103495847B publication Critical patent/CN103495847B/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/14Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02Constructions of connecting-rods with constant length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P2700/00Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/04Connecting rods

Abstract

The present invention relates to machine components processing technique field, specifically, a kind of processing technology of connecting rod is disclosed, mainly comprise roughing stage, semifinishing stage and finishing stage, wherein the roughing stage is the hair Bear-grudge part that forging stub end and little head end are patty, and carries out corase grind processing to surface of the work; In the semifinishing stage, adopt boring cutter to carry out car hole machined to the major part stomidium of connecting rod and microcephaly's stomidium, and carry out out oil groove and fall exterior angle and the interior angle of falling oil groove and process; Finishing stage comprises and carries out fine grinding process to surface of the work, and carries out top gem of a girdle-pendant macropore and the little hole machined of the top gem of a girdle-pendant to the major part stomidium of connecting rod and microcephaly's stomidium.Advantage of the present invention is that each operation stage arrangement is reasonable, enormously simplify the step of processes, improves the productivity ratio of connecting rod, well reduce the weight of connecting rod simultaneously and add the intensity of connecting rod, the connecting rod bearing capacity effectively improved.

Description

Machining of Connecting Rod technique
Technical field
The present invention relates to machine components processing technique field, specifically, relate to a kind of processing technology of connecting rod.
Background technology
At present, a kind of typical part processing during Machining of Connecting Rod in manufacturing technology.Connecting rod is made up of connecting rod cap and shaft, and by screw, connecting rod cap and shaft are combined, its stub end is connected with bent axle usually, and little head end is connected with piston by piston pin, the gas pressure acting on piston is passed to bent axle, makes the reciprocating motion of piston become the rotary motion of bent axle.Connecting rod operationally, the size and Orientation ordering about the gas pressure of reciprocating motion of the pistons is all mechanical periodicity, meanwhile, the pressure of gas produces very large compression stress and collapsing stress at shaft, connecting rod is made to bear larger tension, so connecting rod is that what to bear is the dynamic loading of shock feature, therefore need that connecting rod is lightweight, intensity will be got well.
Because the rigidity of connecting rod itself is lower, under the External Force Acting such as cutting force and clamping force, the connecting rod body of rod easily produces distortion, puzzlement is brought to machining, secondly, connecting rod is forging part, the allowance in hole is large, can produce larger residualinternal stress during cutting, causes connecting rod to produce deformation, therefore, usually Roughing and fine machining need be separated when processing connecting rod, before roughing is placed on, after fine finishining is arranged in, causing the whole process of connecting rod class processing technology complicated thus, work pieces process efficiency is low, can not meet the demand of processing technology in enormous quantities.
Summary of the invention
The object of the invention is, for existing Machining of Connecting Rod complex process, working (machining) efficiency is low and connecting rod bearing capacity is weak shortcoming, to provide a kind of processing technology of high efficiency connecting rod.
Technical scheme of the present invention is: a kind of Machining of Connecting Rod technique, is characterized in that: comprise roughing stage, semifinishing stage and finishing stage,
(1) the roughing stage: forging hair Bear-grudge part, this blank is 20Cr steel, hardness HRC value is 20 °-25 °, this blank comprises stub end, shaft and little head end, and stub end and little head end are patty, and copper plating treatment is carried out on the hair Bear-grudge part surface of forging molding, surface grinding machine is adopted to carry out corase grind processing to surface of the work, with the both ends of the surface of connecting rod for datum plane, adopt numerical control drilling machine carry out brill macropore to big end end and little head end and bore aperture process, obtain first piece;
(2) the semifinishing stage: the first piece that step (1) obtains is put into numerically controlled lathe, with the both ends of the surface of connecting rod for datum plane, boring cutter is adopted to carry out car hole machined to the major part stomidium of connecting rod and microcephaly's stomidium, milling and drilling machine is driven oil groove to big end stomidium and is fallen exterior angle and the interior angle of falling oil groove and process, and is heat-treated by obtained workpiece;
(3) finishing stage: adopt surface grinding machine to carry out fine grinding process to surface of the work, honing machine carries out top gem of a girdle-pendant macropore and the little hole machined of the top gem of a girdle-pendant to the major part stomidium of connecting rod and microcephaly's stomidium respectively, the carburizing depth of the stub end of the connecting rod obtained, little head end and both ends of the surface is 0.6-0.9mm, and hardness is HRC value is 57 °-61 °.
Preferably, the carburizing depth of the stub end of the connecting rod obtained after described step (2) heat treatment, little head end and both ends of the surface is 0.8-1mm, and hardness is HRC value is 58 °-62 °.
Preferably, adopt pneumatic measuring instrument that the connecting rod that the fine finishining of step (3) finally obtains is carried out precision measurement and detection.
The present invention's beneficial effect is compared with prior art:
(1) connecting rod processes process is divided into roughing stage, semifinishing stage and finishing stage, and each operation stage arrangement is reasonable, enormously simplify the step of processes, improves the productivity ratio of connecting rod;
(2) Machining of Connecting Rod technique of the present invention, the carburizing depth of the stub end of the connecting rod that fine finishining finally obtains, little head end and both ends of the surface is 0.6-0.9mm, hardness is HRC value is 57 °-61 °, well reduce the weight of connecting rod and add the intensity of connecting rod, the connecting rod bearing capacity effectively improved;
Accompanying drawing explanation
Fig. 1 is the connecting rod schematic diagram after the present invention processes;
Fig. 2 is the connecting rod hair Bear-grudge part schematic diagram before the present invention processes.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described:
Embodiment 1:
See Fig. 1 and Fig. 2, a kind of Machining of Connecting Rod technique, comprises roughing stage, semifinishing stage and finishing stage,
(1) the roughing stage: forging smooth surface, without damaging, scratch and slight crack hair Bear-grudge part, this blank is 20Cr steel, hardness HRC value is 20 °, this blank comprises stub end, shaft and little head end, stub end and little head end are patty, wherein the stub end of connecting rod and the centre-to-centre spacing of little head end are 100mm, stub end radius 26mm, little head end radius 16.5mm, copper plating treatment is carried out on the hair Bear-grudge part surface of forging molding, surface grinding machine is adopted to carry out corase grind processing to surface of the work, with the both ends of the surface of connecting rod for datum plane, numerical control drilling machine is adopted to carry out brill macropore to big end end and little head end and bore aperture process, obtain first piece,
(2) the semifinishing stage: the first piece that step (1) obtains is put into numerically controlled lathe, with the both ends of the surface of connecting rod for datum plane, boring cutter is adopted to carry out car hole machined to the major part stomidium of connecting rod and microcephaly's stomidium, milling and drilling machine is driven oil groove to big end stomidium and is fallen exterior angle and the interior angle of falling oil groove and process, obtained workpiece is heat-treated, the carburizing depth of the stub end of the connecting rod obtained after heat treatment, little head end and both ends of the surface is 0.8mm, and hardness is HRC value is 58 °;
(3) finishing stage: adopt surface grinding machine to carry out fine grinding process to surface of the work, honing machine carries out top gem of a girdle-pendant macropore and the little hole machined of the top gem of a girdle-pendant to the major part stomidium of connecting rod and microcephaly's stomidium respectively, the stub end of the connecting rod obtained, the carburizing depth of little head end and both ends of the surface is 0.7mm, hardness is HRC value is 57 °, the hardness HRC value of workpiece remainder 25 °, the hole centre-to-centre spacing of stub end and little head end is 100mm, stub end radius 24mm, little head end radius 15mm, finally, adopt pneumatic measuring instrument that the connecting rod that the fine finishining of step (3) finally obtains is carried out precision measurement and detection.
Embodiment 2:
See Fig. 1 and Fig. 2, a kind of Machining of Connecting Rod technique, comprises roughing stage, semifinishing stage and finishing stage,
(1) the roughing stage: forging smooth surface, without damaging, scratch and slight crack hair Bear-grudge part, this blank is 20Cr steel, hardness HRC value is 23 °, this blank comprises stub end, shaft and little head end, stub end and little head end are patty, wherein the stub end of connecting rod and the centre-to-centre spacing of little head end are 100mm, stub end radius 26mm, little head end radius 16.5mm, copper plating treatment is carried out on the hair Bear-grudge part surface of forging molding, surface grinding machine is adopted to carry out corase grind processing to surface of the work, with the both ends of the surface of connecting rod for datum plane, numerical control drilling machine is adopted to carry out brill macropore to big end end and little head end and bore aperture process, obtain first piece,
(2) the semifinishing stage: the first piece that step (1) obtains is put into numerically controlled lathe, with the both ends of the surface of connecting rod for datum plane, boring cutter is adopted to carry out car hole machined to the major part stomidium of connecting rod and microcephaly's stomidium, milling and drilling machine is driven oil groove to big end stomidium and is fallen exterior angle and the interior angle of falling oil groove and process, obtained workpiece is heat-treated, the carburizing depth of the stub end of the connecting rod obtained after heat treatment, little head end and both ends of the surface is 0.9mm, and hardness is HRC value is 60 °;
(3) finishing stage: adopt surface grinding machine to carry out fine grinding process to surface of the work, honing machine carries out top gem of a girdle-pendant macropore and the little hole machined of the top gem of a girdle-pendant to the major part stomidium of connecting rod and microcephaly's stomidium respectively, the stub end of the connecting rod obtained, the carburizing depth of little head end and both ends of the surface is 0.8mm, hardness is HRC value is 59 °, the hardness HRC value of workpiece remainder 32 °, the hole centre-to-centre spacing of stub end and little head end is 100mm, stub end radius 24mm, little head end radius 15mm, finally, adopt pneumatic measuring instrument that the connecting rod that the fine finishining of step (3) finally obtains is carried out precision measurement and detection.
Embodiment 3:
See Fig. 1 and Fig. 2, a kind of Machining of Connecting Rod technique, comprises roughing stage, semifinishing stage and finishing stage,
(1) the roughing stage: forging smooth surface, without damaging, scratch and slight crack hair Bear-grudge part, this blank is 20Cr steel, hardness HRC value is 25 °, this blank comprises stub end, shaft and little head end, stub end and little head end are patty, wherein the stub end of connecting rod and the centre-to-centre spacing of little head end are 100mm, stub end radius 26mm, little head end radius 16.5mm, copper plating treatment is carried out on the hair Bear-grudge part surface of forging molding, surface grinding machine is adopted to carry out corase grind processing to surface of the work, with the both ends of the surface of connecting rod for datum plane, numerical control drilling machine is adopted to carry out brill macropore to big end end and little head end and bore aperture process, obtain first piece,
(2) the semifinishing stage: the first piece that step (1) obtains is put into numerically controlled lathe, with the both ends of the surface of connecting rod for datum plane, boring cutter is adopted to carry out car hole machined to the major part stomidium of connecting rod and microcephaly's stomidium, milling and drilling machine is driven oil groove to big end stomidium and is fallen exterior angle and the interior angle of falling oil groove and process, obtained workpiece is heat-treated, the carburizing depth of the stub end of the connecting rod obtained after heat treatment, little head end and both ends of the surface is 1mm, and hardness is HRC value is 62 °;
(3) finishing stage: adopt surface grinding machine to carry out fine grinding process to surface of the work, honing machine carries out top gem of a girdle-pendant macropore and the little hole machined of the top gem of a girdle-pendant to the major part stomidium of connecting rod and microcephaly's stomidium respectively, the stub end of the connecting rod obtained, the carburizing depth of little head end and both ends of the surface is 0.9mm, hardness is HRC value is 61 °, the hardness HRC value of workpiece remainder 44 °, the hole centre-to-centre spacing of stub end and little head end is 100mm, stub end radius 24mm, little head end radius 15mm, finally, adopt pneumatic measuring instrument that the connecting rod that the fine finishining of step (3) finally obtains is carried out precision measurement and detection.
Embodiment 4:
See Fig. 1 and Fig. 2, a kind of Machining of Connecting Rod technique, comprises roughing stage, semifinishing stage and finishing stage,
(1) the roughing stage: forging smooth surface, without damaging, scratch and slight crack hair Bear-grudge part, this blank is 20Cr steel, hardness HRC value is 25 °, this blank comprises stub end, shaft and little head end, stub end and little head end are patty, wherein the stub end of connecting rod and the centre-to-centre spacing of little head end are 100mm, stub end radius 26mm, little head end radius 16.5mm, copper plating treatment is carried out on the hair Bear-grudge part surface of forging molding, surface grinding machine is adopted to carry out corase grind processing to surface of the work, with the both ends of the surface of connecting rod for datum plane, numerical control drilling machine is adopted to carry out brill macropore to big end end and little head end and bore aperture process, obtain first piece,
(2) the semifinishing stage: the first piece that step (1) obtains is put into numerically controlled lathe, with the both ends of the surface of connecting rod for datum plane, boring cutter is adopted to carry out car hole machined to the major part stomidium of connecting rod and microcephaly's stomidium, milling and drilling machine is driven oil groove to big end stomidium and is fallen exterior angle and the interior angle of falling oil groove and process, obtained workpiece is heat-treated, the carburizing depth of the stub end of the connecting rod obtained after heat treatment, little head end and both ends of the surface is 1mm, and hardness is HRC value is 62 °;
(3) finishing stage: adopt surface grinding machine to carry out fine grinding process to surface of the work, honing machine carries out top gem of a girdle-pendant macropore and the little hole machined of the top gem of a girdle-pendant to the major part stomidium of connecting rod and microcephaly's stomidium respectively, the stub end of the connecting rod obtained, the carburizing depth of little head end and both ends of the surface is 0.9mm, hardness is HRC value is 62 °, the hardness HRC value of workpiece remainder 44 °, the hole centre-to-centre spacing of stub end and little head end is 100mm, stub end radius 24mm, little head end radius 15mm, finally, adopt pneumatic measuring instrument that the connecting rod that the fine finishining of step (3) finally obtains is carried out precision measurement and detection.

Claims (3)

1. a Machining of Connecting Rod technique, is characterized in that: comprise roughing stage, semifinishing stage and finishing stage,
(1) the roughing stage: rough forging part, this blank is 20Cr steel, hardness HRC value is 20 °-25 °, this blank comprises stub end, shaft and little head end, and stub end and little head end are patty, and copper plating treatment is carried out on the blank surface of forging molding, surface grinding machine is adopted to carry out corase grind processing to surface of the work, with the both ends of the surface of connecting rod for datum plane, adopt numerical control drilling machine carry out brill macropore to big end end and little head end and bore aperture process, obtain first piece;
(2) the semifinishing stage: the first piece that step (1) obtains is put into numerically controlled lathe, with the both ends of the surface of connecting rod for datum plane, boring cutter is adopted to carry out car hole machined to the major part stomidium of connecting rod and microcephaly's stomidium, milling and drilling machine is driven oil groove to big end stomidium and is fallen exterior angle and the interior angle of falling oil groove and process, and is heat-treated by obtained workpiece;
(3) finishing stage: adopt surface grinding machine to carry out fine grinding process to surface of the work, honing machine carries out top gem of a girdle-pendant macropore and the little hole machined of the top gem of a girdle-pendant to the major part stomidium of connecting rod and microcephaly's stomidium respectively, the carburizing depth of the stub end of the connecting rod obtained, little head end and both ends of the surface is 0.6-0.9mm, and hardness is HRC value is 57 °-61 °.
2. a kind of Machining of Connecting Rod technique according to claim 1, is characterized in that: the carburizing depth of the stub end of the connecting rod obtained after described step (2) heat treatment, little head end and both ends of the surface is 0.8-1mm, and hardness is HRC value is 58 °-62 °.
3. a kind of Machining of Connecting Rod technique according to claim 1, is characterized in that: adopt pneumatic measuring instrument that the connecting rod that the fine finishining of step (3) finally obtains is carried out precision measurement and detection.
CN201310487357.2A 2013-10-16 2013-10-16 Machining of Connecting Rod technique CN103495847B (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN109249245A (en) * 2018-08-24 2019-01-22 青岛锦瑞特园林工具有限公司 The Machining of Connecting Rod technique of connecting rod smart car mold and the application mold

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CN104400345A (en) * 2014-10-29 2015-03-11 苏州市金德誉精密机械有限公司 Processing technique of connecting rod
CN104439900A (en) * 2014-11-24 2015-03-25 苏州市福迈精密机械有限公司 Lever part machining process
CN104384863A (en) * 2014-11-24 2015-03-04 苏州市福迈精密机械有限公司 Machining technology of connecting rod
CN105081686B (en) * 2015-03-16 2017-05-10 台州广播电视大学 Ball crank processing flow
CN105179456A (en) * 2015-06-29 2015-12-23 唐萍 Vehicle connection rod production process
CN105666056A (en) * 2016-02-24 2016-06-15 湖南汉星机械制造有限公司 Machining process for small gasoline engine connection rod
CN106271425B (en) * 2016-08-29 2018-10-09 贵州新安航空机械有限责任公司 A kind of mechanical processing technique of connecting rod
CN108237375A (en) * 2017-12-04 2018-07-03 安徽未来机电科技有限公司 A kind of end face drilling technology of retarder connecting rod
CN109434389A (en) * 2018-12-07 2019-03-08 安徽江淮汽车集团股份有限公司 A kind of disconnected processing method that rises of engine link
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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