CN102950433A - Gear processing technology for gear pump - Google Patents

Gear processing technology for gear pump Download PDF

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Publication number
CN102950433A
CN102950433A CN2012104174431A CN201210417443A CN102950433A CN 102950433 A CN102950433 A CN 102950433A CN 2012104174431 A CN2012104174431 A CN 2012104174431A CN 201210417443 A CN201210417443 A CN 201210417443A CN 102950433 A CN102950433 A CN 102950433A
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gear
furnace
quenching
stove
per minute
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CN2012104174431A
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CN102950433B (en
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姜国松
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Fulaiyin Automobile Parts Co Ltd
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Fulaiyin Automobile Parts Co Ltd
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Abstract

The invention discloses a gear processing technology for a gear pump. The gear processing technology comprises the following operation steps of 1) selecting a forging piece which adopts the material 20CrMnTi, putting the forging piece into a normalizing furnace, and controlling the temperature to be 900-930 DEG C and the heating time to be 3 hours; 2) carrying out quenching treatment: heating parts to be 850-900 DEG C by putting the parts into a heat treatment furnace, keeping warm for 3.0-4.5 hours, and then cooling by using quenching liquid; and 3) carrying out tempering treatment: heating the parts after quenching to be 350-580 DEG C by feeding the parts after quenching to a tempering furnace under the protective atmosphere, and keeping warm for 50-110 minutes. According to the gear processing technology disclosed by the invention, no axial component exists during a meshing process, the overlap coefficient is large, the using performance is good, the noise is low, the bearing ability is strong, the transmission is stable, the efficiency is high, and the bending strength is large.

Description

A kind of gear pump Gearmaking Technology
Technical field
The present invention relates to the lubricating oil pump field, specifically belong to a kind of gear pump Gearmaking Technology.
Background technology
When engine operation, driven wheel on the camshaft drives the travelling gear of lubricating oil pump, make the driving gear rotation that is fixed on the driving gear shaft, thereby drive the reciprocal rotation of driven tooth crop rotation, with machine oil from oil suction chamber along backlash and the pump wall deliver to out oil pocket.The accuracy of manufacture of Oil pump drive gear has directly affected the serviceability of lubricating oil pump, and the degree of driven wheel is the vitals of lubricating oil pump.
Summary of the invention
The purpose of this invention is to provide a kind of gear pump Gearmaking Technology, shaftless to component in engagement process, overlap coefficient is large, and serviceability is good, and noise is little, and bearing capacity is strong, and stable drive, efficient are high, and bending strength is large.
Technical scheme of the present invention is as follows:
A kind of gear pump Gearmaking Technology includes following operating procedure:
1) selecting material is the forging of 20CrMnTi, and forging is put into normalizing furnace, 900 ℃-930 ℃ of control temperature, heat time heating time 3h;
2) Quenching Treatment: part sent into be heated to 850-900 ℃ in the heat-treatment furnace, and insulation 3.0-4.5 hour; Then, cool off with quenching liquid;
3) temper: under protective atmosphere, the part after quenching sent into be heated to 350-580 ℃ in the tempering furnace, insulation 50-110min;
4) subzero treatment: with the container of packing into of part after the tempering, add liquid nitrogen and carry out subzero treatment, the time is 11-12 hour;
5) select numerically controlled lathe, cutter is selected carbide cutter tool, carries out the large end a to 18.6 of finish turning gear ± 0.2mm, small end b to 6.1 ± 0.05mm, external diameter e to φ 74.1 ± 0.1mm and chamfering, endoporus c to φ 38.5 ± 0.1 mm;
6) select numerically controlled lathe, cutter is selected carbide cutter tool, carries out finish turning gear other end f to 16.2 ± 0.02 mm, external diameter g to φ 75.2+0.05 0mm, hole h to φ 55.5 ± 0.2 mm, end face i to 4.1 ± 0.03 mm, endoporus c to φ 39.8+0.02 0mm;
7) utilize gear-hobbing machine to carry out gear hobbing, carry out shaving after the gear hobbing again and process, the shaving precision reaches 6 class precisions;
8) on broaching machine, draw keyway j, groove width 8 ± 0.01mm, groove depth 3.1+0.2 0mm;
9) in the Yi Pusen industrial furnace, gear is carried out carbo-nitriding process, gear surface hardness 57~63HRC, core hardness 33~45HRC, infiltration layer 0.5~0.8mm, metallographic structure reaches the 1-5 level;
10) correct grinding gear face b to 16.1 ± 0.05mm, endoporus c to φ 40+0.041+0.025mm on the numeral-controlled internal grinder;
11) at surface grinding machine correct grinding end face f to 16 ± 0.05mm;
12) gear that shapes is put into nitriding furnace, then be warming up to 400 ℃~500 ℃, wherein programming rate is 80 ℃~120 ℃/hour, guarantees that the scope of vacuum in the stove is 400-700pa; (2), then pass into ammonia in nitriding furnace, keep the interior temperature of stove at 500 ℃-540 ℃, per minute passes into ammonia 1.6~2L, and vacuum is about 460pa in the stove, and the time is 5.5h; (3), then be warming up to 550 ℃-560 ℃, continuation passes into ammonia by per minute 1.6~2L, pass into nitrogen by per minute 1~1.5L simultaneously, 0.2~0.25L passes into earth solution by per minute, vacuum is about 550pa in the stove, time is 3~4h, through flaw detection, product inspection, cleaning rust-proof packing, final finished warehouse-in.
Described in the Yi Pusen industrial furnace, gear is carried out carbo-nitriding process, gear surface hardness 60HRC, core hardness 38HRC, infiltration layer 0.5~0.8mm, metallographic structure reaches 3 grades.
The present invention is shaftless to component in engagement process, and overlap coefficient is large, and serviceability is good, and noise is little, and bearing capacity is strong, and stable drive, efficient are high, and bending strength is large.
The gear finished product that utilizes the inventive method to produce is as follows through laboratory detection result, process hardness error≤25HBW with stove diverse location part and Same Part diverse location, metallographic structure is the tiny spherical carbide of point that evenly distributes on ferrite matrix, the Kang La Qiang Du>=250Mpa of gear tooth, gear-driven overlap coefficient 1.2-1.5, the accuracy class of gear satisfies actual operation requirements fully in the 6-7 level.
Description of drawings
Fig. 1 is process schematic diagram of the present invention.
The specific embodiment
Referring to accompanying drawing, a kind of gear pump Gearmaking Technology includes following operating procedure:
1) selecting material is the forging of 20CrMnTi, and forging is put into normalizing furnace, 900 ℃-930 ℃ of control temperature, heat time heating time 3h;
2) Quenching Treatment: part sent into be heated to 850-900 ℃ in the heat-treatment furnace, and insulation 3.0-4.5 hour; Then, cool off with quenching liquid;
3) temper: under protective atmosphere, the part after quenching sent into be heated to 350-580 ℃ in the tempering furnace, insulation 50-110min;
4) subzero treatment: with the container of packing into of part after the tempering, add liquid nitrogen and carry out subzero treatment, the time is 11-12 hour;
5) select numerically controlled lathe, cutter is selected carbide cutter tool, carries out the large end a to 18.6 of finish turning gear ± 0.2mm, small end b to 6.1 ± 0.05mm, external diameter e to φ 74.1 ± 0.1mm and chamfering, endoporus c to φ 38.5 ± 0.1 mm;
6) select numerically controlled lathe, cutter is selected carbide cutter tool, carries out finish turning gear other end f to 16.2 ± 0.02 mm, external diameter g to φ 75.2+0.05 0mm, hole h to φ 55.5 ± 0.2 mm, end face i to 4.1 ± 0.03 mm, endoporus c to φ 39.8+0.02 0mm;
7) utilize gear-hobbing machine to carry out gear hobbing, carry out shaving after the gear hobbing again and process, the shaving precision reaches 6 class precisions;
8) on broaching machine, draw keyway j, groove width 8 ± 0.01mm, groove depth 3.1+0.2 0mm;
9) in the Yi Pusen industrial furnace, gear is carried out carbo-nitriding process, gear surface hardness 60HRC, core hardness 38HRC, infiltration layer 0.5~0.8mm, metallographic structure reaches 3 grades;
10) correct grinding gear face b to 16.1 ± 0.05mm, endoporus c to φ 40+0.041+0.025mm on the numeral-controlled internal grinder;
11) at surface grinding machine correct grinding end face f to 16 ± 0.05mm;
12) gear that shapes is put into nitriding furnace, then be warming up to 400 ℃~500 ℃, wherein programming rate is 80 ℃~120 ℃/hour, guarantees that the scope of vacuum in the stove is 400-700pa; (2), then pass into ammonia in nitriding furnace, keep the interior temperature of stove at 500 ℃-540 ℃, per minute passes into ammonia 1.6~2L, and vacuum is about 460pa in the stove, and the time is 5.5h; (3), then be warming up to 550 ℃-560 ℃, continuation passes into ammonia by per minute 1.6~2L, pass into nitrogen by per minute 1~1.5L simultaneously, 0.2~0.25L passes into earth solution by per minute, vacuum is about 550pa in the stove, time is 3~4h, through flaw detection, product inspection, cleaning rust-proof packing, final finished warehouse-in.

Claims (2)

1. a gear pump Gearmaking Technology is characterized in that, includes following operating procedure:
1) selecting material is the forging of 20CrMnTi, and forging is put into normalizing furnace, 900 ℃-930 ℃ of control temperature, heat time heating time 3h;
2) Quenching Treatment: part sent into be heated to 850-900 ℃ in the heat-treatment furnace, and insulation 3.0-4.5 hour; Then, cool off with quenching liquid;
3) temper: under protective atmosphere, the part after quenching sent into be heated to 350-580 ℃ in the tempering furnace, insulation 50-110min;
4) subzero treatment: with the container of packing into of part after the tempering, add liquid nitrogen and carry out subzero treatment, the time is 11-12 hour;
5) select numerically controlled lathe, cutter is selected carbide cutter tool, carries out the large end a to 18.6 of finish turning gear ± 0.2mm, small end b to 6.1 ± 0.05mm, external diameter e to φ 74.1 ± 0.1mm and chamfering, endoporus c to φ 38.5 ± 0.1 mm;
6) select numerically controlled lathe, cutter is selected carbide cutter tool, carries out finish turning gear other end f to 16.2 ± 0.02 mm, external diameter g to φ 75.2+0.05 0mm, hole h to φ 55.5 ± 0.2 mm, end face i to 4.1 ± 0.03 mm, endoporus c to φ 39.8+0.02 0mm;
7) utilize gear-hobbing machine to carry out gear hobbing, carry out shaving after the gear hobbing again and process, the shaving precision reaches 6 class precisions;
8) on broaching machine, draw keyway j, groove width 8 ± 0.01mm, groove depth 3.1+0.2 0mm;
9) in the Yi Pusen industrial furnace, gear is carried out carbo-nitriding process, gear surface hardness 57~63HRC, core hardness 33~45HRC, infiltration layer 0.5~0.8mm, metallographic structure reaches the 1-5 level;
10) correct grinding gear face b to 16.1 ± 0.05mm, endoporus c to φ 40+0.041+0.025mm on the numeral-controlled internal grinder;
11) at surface grinding machine correct grinding end face f to 16 ± 0.05mm;
12) gear that shapes is put into nitriding furnace, then be warming up to 400 ℃~500 ℃, wherein programming rate is 80 ℃~120 ℃/hour, guarantees that the scope of vacuum in the stove is 400-700pa; (2), then pass into ammonia in nitriding furnace, keep the interior temperature of stove at 500 ℃-540 ℃, per minute passes into ammonia 1.6~2L, and vacuum is about 460pa in the stove, and the time is 5.5h; (3), then be warming up to 550 ℃-560 ℃, continuation passes into ammonia by per minute 1.6~2L, pass into nitrogen by per minute 1~1.5L simultaneously, 0.2~0.25L passes into earth solution by per minute, vacuum is about 550pa in the stove, time is 3~4h, through flaw detection, product inspection, cleaning rust-proof packing, final finished warehouse-in.
2. described gear pump Gearmaking Technology according to claim 1 is characterized in that, and is described in the Yi Pusen industrial furnace, gear is carried out carbo-nitriding process gear surface hardness 60HRC, core hardness 38HRC, infiltration layer 0.5~0.8mm, metallographic structure reaches 3 grades.
CN201210417443.1A 2012-10-27 2012-10-27 A kind of gear pump Gearmaking Technology Active CN102950433B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105715768A (en) * 2014-12-05 2016-06-29 富莱茵汽车部件有限公司 Gear of air compressor
CN105855816A (en) * 2016-05-27 2016-08-17 苏州威富达精密机械制造有限公司 Machining technology of large gear for transmission
CN105855815A (en) * 2016-05-27 2016-08-17 苏州威富达精密机械制造有限公司 Machining technology of large gear for transmission of crane
CN106514165A (en) * 2016-12-15 2017-03-22 贵州群建精密机械有限公司 Glow-ion nitriding treatment method for gear made of 05Cr17Ni4Cu4Nb material
CN108034793A (en) * 2017-12-21 2018-05-15 西南大学 A kind of cryogenic treatment process of reinforcing 17CrNiMo6 hardened steel
CN108581399A (en) * 2018-07-12 2018-09-28 合肥银泉铸造有限责任公司 A kind of hard rack pinion processing technology
CN109402359A (en) * 2018-11-06 2019-03-01 包头钢铁(集团)有限责任公司 A kind of heat treatment method of gear steel
CN110358898A (en) * 2019-08-27 2019-10-22 天长市华海电子科技有限公司 A kind of heat treatment process of more alloy forging parts

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106002117A (en) * 2016-05-27 2016-10-12 苏州威富达精密机械制造有限公司 Technology for processing eccentric type gear

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE2918472A1 (en) * 1979-05-08 1980-11-13 Kaltumform Technik E Wezel Gmb Two=stage cold extrusion process for gear wheel mfr. - uses die with taper bore to finish rough formed gears
CN1257132A (en) * 1999-12-16 2000-06-21 贵州工业大学 Stentor cemented steel for gear and thermal working technology
CN1446939A (en) * 2003-04-24 2003-10-08 十堰市郧齿汽车零部件有限公司 Technique for manufacturing timing gear of engine of light-duty vehicles
CN101428387A (en) * 2008-12-10 2009-05-13 株洲齿轮有限责任公司 Helix bevel gear active tooth threading machining process
EP2213396A2 (en) * 2009-02-03 2010-08-04 Wesa GmbH Method and device for manufacturing a shaft
CN102011057A (en) * 2010-12-27 2011-04-13 承德建龙特殊钢有限公司 CrMnTi series gear steel and processing technique thereof
CN102672440A (en) * 2012-04-28 2012-09-19 重庆市江津区宏盛机械制造有限公司 Light rail output bevel wheel machining process

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2918472A1 (en) * 1979-05-08 1980-11-13 Kaltumform Technik E Wezel Gmb Two=stage cold extrusion process for gear wheel mfr. - uses die with taper bore to finish rough formed gears
CN1257132A (en) * 1999-12-16 2000-06-21 贵州工业大学 Stentor cemented steel for gear and thermal working technology
CN1446939A (en) * 2003-04-24 2003-10-08 十堰市郧齿汽车零部件有限公司 Technique for manufacturing timing gear of engine of light-duty vehicles
CN101428387A (en) * 2008-12-10 2009-05-13 株洲齿轮有限责任公司 Helix bevel gear active tooth threading machining process
EP2213396A2 (en) * 2009-02-03 2010-08-04 Wesa GmbH Method and device for manufacturing a shaft
CN102011057A (en) * 2010-12-27 2011-04-13 承德建龙特殊钢有限公司 CrMnTi series gear steel and processing technique thereof
CN102672440A (en) * 2012-04-28 2012-09-19 重庆市江津区宏盛机械制造有限公司 Light rail output bevel wheel machining process

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105715768A (en) * 2014-12-05 2016-06-29 富莱茵汽车部件有限公司 Gear of air compressor
CN105855816A (en) * 2016-05-27 2016-08-17 苏州威富达精密机械制造有限公司 Machining technology of large gear for transmission
CN105855815A (en) * 2016-05-27 2016-08-17 苏州威富达精密机械制造有限公司 Machining technology of large gear for transmission of crane
CN106514165A (en) * 2016-12-15 2017-03-22 贵州群建精密机械有限公司 Glow-ion nitriding treatment method for gear made of 05Cr17Ni4Cu4Nb material
CN108034793A (en) * 2017-12-21 2018-05-15 西南大学 A kind of cryogenic treatment process of reinforcing 17CrNiMo6 hardened steel
CN108581399A (en) * 2018-07-12 2018-09-28 合肥银泉铸造有限责任公司 A kind of hard rack pinion processing technology
CN109402359A (en) * 2018-11-06 2019-03-01 包头钢铁(集团)有限责任公司 A kind of heat treatment method of gear steel
CN110358898A (en) * 2019-08-27 2019-10-22 天长市华海电子科技有限公司 A kind of heat treatment process of more alloy forging parts

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