CN102654187A - High-precision low-cost machining method for transmission chain wheel of oil pump - Google Patents

High-precision low-cost machining method for transmission chain wheel of oil pump Download PDF

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Publication number
CN102654187A
CN102654187A CN2011100513367A CN201110051336A CN102654187A CN 102654187 A CN102654187 A CN 102654187A CN 2011100513367 A CN2011100513367 A CN 2011100513367A CN 201110051336 A CN201110051336 A CN 201110051336A CN 102654187 A CN102654187 A CN 102654187A
Authority
CN
China
Prior art keywords
gear ring
powder
precision
oil pump
chain wheel
Prior art date
Application number
CN2011100513367A
Other languages
Chinese (zh)
Inventor
陈千友
Original Assignee
自贡市富源车辆部件有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 自贡市富源车辆部件有限公司 filed Critical 自贡市富源车辆部件有限公司
Priority to CN2011100513367A priority Critical patent/CN102654187A/en
Publication of CN102654187A publication Critical patent/CN102654187A/en

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Abstract

The invention discloses a high-precision low-cost machining method for a transmission chain wheel of an oil pump, which is used for constructing a chain wheel with the following structure: the chain wheel comprises a metal hub, a gear ring and a vulcanization integrated rubber body. The machining method provided by the invention comprises the following steps of: a, carrying out powder metallurgy to form a gear ring; b, forming a product through vulcanization: integrally forming a conventional metal hub, the gear ring obtained in the step a, and a half finished product rubber through vulcanization; and c, finishing to obtain a product with a structure of the conventional product. The high-precision low-cost machining method provided by the invention has the advantages in that according to the high-precision gear ring obtained by the steps provided by the invention, the dimensional precision of a root circle and the like is 8 level, and the fineness is 0.8; the crushing strength is more than or equal to 300 MPa; the density is more than or equal to 68000 Kg/m<3>; and the rigidity is 60-100 HRB. According to the innovation provided by the invention, the traditional machining method for the transmission chain wheel of the oil pump is improved, so that not only can the high-precision product be manufactured, but also the machining procedures are fewer due to the adjustment of the process, and the manufacturing cost is low. The gear ring is about ** Yuan/piece.

Description

The oil pump drive sprocket processing method of high-precision low cost
Technical field
The present invention relates to motorcycle accessories, be specially the oil pump drive sprocket processing method of motorcycle with high-precision low cost.
Background technique
Existing motorcycle is used the oil pump drive sprocket, and structure comprises metal wheel hub, 45 steel-tooth circle and rubber body; 45 steel-tooth circles and rubber and metal wheel hub are through the over cure global formation, and the gear ring material in course of working is 45 steel, through gear hobbing or gear shaping moulding; Carry out quenching heat treatment again, operation is various.Because through Quenching Treatment, the distortion of the profile of tooth of gear ring is bigger, root circle equidimension precision is not high, can only reach 10 class precisions, and flank of tooth degree of finish is poor, can only reach 3.2, influences the product usability.Because the various cost of production of technology is higher, reaches about 0.8 yuan/part usually.
Summary of the invention
The technical problem that the present invention will solve provides the oil pump drive sprocket processing method with high-precision low cost.
For solving the problems of the technologies described above, the technological scheme that the present invention adopts is:
The oil pump drive sprocket processing method of high-precision low cost, it is for making up the sprocket wheel of following structure: sprocket wheel comprises the rubber body of metal wheel hub and gear ring and sulfuration one; Its processing method comprises the steps:
A, powder metallurgy gear ring: (this step comprises following steps)
The preparation of a1, powder metallurgy powder (weight percentage): electrolytic copper powder 1.2%, 999 scale graphites 1.0%, ferrophosphorus powder 0.3%, zine stearate 0.4% and LHF100.25 type reducing iron powder 97.1%;
A2, the good powder metallurgy powder of will filling a prescription are sent in the precise compression molding mould; This precise compression molding mould and die accuracy reaches 6 grades at least, and degree of finish is spent at least and reached 0.4, on 100T Full Automatic Liquid press; Set the pressure of 20MPa, with powder metallurgy powder precision press molding gear ring;
A3, the gear ring of compression moulding is put into 50KW push rod sintering furnace through four district's sintering; Sintering temperature is: 720 ℃ in a district; 950 ℃ in two districts; 1080 ℃ in three districts; 990 ℃ in four districts; Sintering time is: every district 2 hours;
B, sulfidization molding product: use the gear ring and the semi-finished rubber sulfuration global formation that obtain among existing metal wheel hub and the step a;
C, repair, promptly obtain the product identical with the existing product structure.
Good effect of the present invention is: obtain high-precision gear ring through step of the present invention, its root circle equidimension precision is 8 grades, and degree of finish is 0.8; Crushing strength>=300MPa, density>=68000Kg/m 3, hardness 60 ~ 100HRB.Because gear ring is through the compression moulding of precise compression molding mould, so dimensional accuracy and all raisings greatly of degree of finish, and then guarantee that the precision of final products significantly improves.Innovation of the present invention has been to improve traditional oil pump drive sprocket processing method, is the precondition that can produce the highi degree of accuracy product, and because the adjustment manufacturing procedure of technology is few, low cost of manufacture, gear ring is about 0.45 yuan/part.
Description of drawings:
Fig. 1, final product structure schematic representation of the present invention;
Fig. 2, product A-A sectional view.
Specifically describe mode of execution below in conjunction with accompanying drawing.
Embodiment:
The oil pump drive sprocket processing method of high-precision low cost, it is for making up the sprocket wheel like the structure of Fig. 1, meaning shown in Figure 2: sprocket wheel comprises the rubber body (2) of metal wheel hub (1) and gear ring (3) and sulfuration one; Its processing method comprises the steps:
A, powder metallurgy gear ring: (this step comprises following steps)
The preparation of a1, powder metallurgy powder (weight percentage): electrolytic copper powder 1.2%, 999 scale graphites 1.0%, ferrophosphorus powder 0.3%, zine stearate 0.4% and LHF100.25 type reducing iron powder 97.1%;
A2, the good powder metallurgy powder of will filling a prescription are sent in the precise compression molding mould, and this precise compression molding mould and die accuracy reaches 6 grades at least, and degree of finish reaches 0.4 at least, on 100T Full Automatic Liquid press, set the pressure of 20MPa, with powder metallurgy powder precision press molding gear ring;
A3, the gear ring of compression moulding is put into 50KW push rod sintering furnace through four district's sintering; Sintering temperature is: 720 ℃ in a district; 950 ℃ in two districts; 1080 ℃ in three districts; 990 ℃ in four districts; Sintering time is: every district 2 hours;
B, sulfidization molding product: use the gear ring and the semi-finished rubber sulfuration global formation that obtain among existing metal wheel hub and the step a;
C, repair, promptly obtain the product identical with the existing product structure.
More than be preferred embodiment of the present invention, all changes of doing according to technological scheme of the present invention when the function that is produced does not exceed the scope of technological scheme of the present invention, all belong to protection scope of the present invention.

Claims (1)

1. the oil pump drive sprocket processing method of high-precision low cost, it is for making up the sprocket wheel of following structure: sprocket wheel comprises metal wheel hub (1) and gear ring (3) and vulcanizes the rubber body (2) of one; It is characterized in that processing method comprises the steps:
A, powder metallurgy gear ring:
The preparation of a1, powder metallurgy powder (weight percentage): electrolytic copper powder 1.2%, 999 scale graphites 1.0%, ferrophosphorus powder 0.3%, zine stearate 0.4% and LHF100.25 type reducing iron powder 97.1%;
A2, the good powder metallurgy powder of will filling a prescription are sent in the precise compression molding mould, and this precise compression molding mould and die accuracy reaches 6 grades at least, and degree of finish reaches 0.4 at least, on 100T Full Automatic Liquid press, set the pressure of 20MPa, with powder metallurgy powder precision press molding gear ring;
A3, the gear ring of compression moulding is put into 50KW push rod sintering furnace through four district's sintering; Sintering temperature is: 720 ℃ in a district; 950 ℃ in two districts; 1080 ℃ in three districts; 990 ℃ in four districts; Sintering time is: every district 2 hours;
B, sulfidization molding product: use the gear ring and the semi-finished rubber sulfuration global formation that obtain among existing metal wheel hub and the step a;
C, repair, promptly obtain the product identical with the existing product structure.
CN2011100513367A 2011-03-04 2011-03-04 High-precision low-cost machining method for transmission chain wheel of oil pump CN102654187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100513367A CN102654187A (en) 2011-03-04 2011-03-04 High-precision low-cost machining method for transmission chain wheel of oil pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100513367A CN102654187A (en) 2011-03-04 2011-03-04 High-precision low-cost machining method for transmission chain wheel of oil pump

Publications (1)

Publication Number Publication Date
CN102654187A true CN102654187A (en) 2012-09-05

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CN2011100513367A CN102654187A (en) 2011-03-04 2011-03-04 High-precision low-cost machining method for transmission chain wheel of oil pump

Country Status (1)

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CN (1) CN102654187A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107243638A (en) * 2017-06-07 2017-10-13 江苏智造新材有限公司 A kind of high-precision, wear-resistant sprocket wheel method for preparing powder metallurgy

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2123658U (en) * 1992-02-29 1992-12-02 青岛橡胶制品六厂 Combined sprocket
US6148685A (en) * 1995-12-15 2000-11-21 Zenith Sintered Products, Inc. Duplex sprocket/gear construction and method of making same
JP2001295915A (en) * 2000-04-11 2001-10-26 Hitachi Powdered Metals Co Ltd Sintered sprocket for silent chain and method of manufacturing the same
JP2005105370A (en) * 2003-09-30 2005-04-21 Mitsubishi Materials Corp Method of producing rotary body provided with pressure resistant face for sliding on circumferential face, such as gear
CN1647874A (en) * 2004-01-28 2005-08-03 博格华纳公司 Method to make sinter-hardened powder metal parts with complex shapes
CN201173283Y (en) * 2008-03-28 2008-12-31 吕元之 Powder metallurgy tractor chain sprocket

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2123658U (en) * 1992-02-29 1992-12-02 青岛橡胶制品六厂 Combined sprocket
US6148685A (en) * 1995-12-15 2000-11-21 Zenith Sintered Products, Inc. Duplex sprocket/gear construction and method of making same
JP2001295915A (en) * 2000-04-11 2001-10-26 Hitachi Powdered Metals Co Ltd Sintered sprocket for silent chain and method of manufacturing the same
JP2005105370A (en) * 2003-09-30 2005-04-21 Mitsubishi Materials Corp Method of producing rotary body provided with pressure resistant face for sliding on circumferential face, such as gear
CN1647874A (en) * 2004-01-28 2005-08-03 博格华纳公司 Method to make sinter-hardened powder metal parts with complex shapes
CN201173283Y (en) * 2008-03-28 2008-12-31 吕元之 Powder metallurgy tractor chain sprocket

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107243638A (en) * 2017-06-07 2017-10-13 江苏智造新材有限公司 A kind of high-precision, wear-resistant sprocket wheel method for preparing powder metallurgy

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Application publication date: 20120905