CN102950433A - Gear processing technology for gear pump - Google Patents
Gear processing technology for gear pump Download PDFInfo
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- 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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- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000010791 quenching Methods 0.000 claims abstract description 13
- 230000000171 quenching Effects 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000005242 forging Methods 0.000 claims abstract description 8
- 238000005496 tempering Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 4
- 230000001681 protective Effects 0.000 claims abstract description 4
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 238000005121 nitriding Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 238000005256 carbonitriding Methods 0.000 claims description 5
- 238000001764 infiltration Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000010687 lubricating oil Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 238000003967 crop rotation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
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.
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| 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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