CN102950439A - Machining process of drive gear of oil pump - Google Patents
Machining process of drive gear of oil pump Download PDFInfo
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- CN102950439A CN102950439A CN2012104184433A CN201210418443A CN102950439A CN 102950439 A CN102950439 A CN 102950439A CN 2012104184433 A CN2012104184433 A CN 2012104184433A CN 201210418443 A CN201210418443 A CN 201210418443A CN 102950439 A CN102950439 A CN 102950439A
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Abstract
The invention discloses a machining process of a drive gear of an oil pump. The machining process comprises the steps of: 1) selecting a forge piece which is made of 20CrMnTi, placing the forge piece into a normalizing furnace, controlling the temperature at 900-930 DEG C and heating for 3h; 2) selecting a numerically controlled lathe, selecting a hard alloy knife as a cutter, precisely turning the large end a of the gear to 18.6mm with 0.2mm plus or minus, the small end b to 6.1mm with 0.05mm plus or minus, the outer diameter e to 74.1mm with 0.1mm plus or minus and chamfering, and precisely turning the inner hole c to 8.5mm with 0.1mm plus or minus; and 3) selecting a numerically controlled lathe, selecting a hard alloy knife as the cutter, precisely turning the other end face f of the gear to 16.2mm with 0.02mm plus or minus, the outer diameter g to 75.2mm with 0.05mm plus or minus, the hole h to 55.5mm with 0.02mm plus or minus, the end face i to 4.1mm with 0.03mm plus or minus, and the inner hole c to 39.8mm with 0.02mm plus or minus. According to the machining process of the drive gear of the oil pump provided by the invention, no axial component force is available in the engaging process, the overlap coefficient is great, the using performance is good, the noise is low, the bearing capacity is strong, transmission is stable, the efficiency is high, and the bending strength is great.
Description
Technical field
The present invention relates to the lubricating oil pump field, specifically belong to a kind of Oil pump drive gear processing 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 Oil pump drive gear processing 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 Oil pump drive gear processing 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) 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;
3) 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;
4) 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;
5) on broaching machine, draw keyway j, groove width 8 ± 0.01mm, groove depth 3.1+0.2 0mm;
6) 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;
7) 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;
8) at surface grinding machine correct grinding end face f to 16 ± 0.05mm;
9) flaw detection, product inspection, cleaning rust-proof packing, 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≤16HBW 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＞=320Mpa of gear tooth, gear-driven overlap coefficient 1.1-1.4, the accuracy class of gear satisfies actual operation requirements fully in the 5-6 level.
Description of drawings
Fig. 1 is process schematic diagram of the present invention.
The specific embodiment
Referring to accompanying drawing, a kind of Oil pump drive gear processing 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) 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;
3) 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;
4) 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;
5) on broaching machine, draw keyway j, groove width 8 ± 0.01mm, groove depth 3.1+0.2 0mm;
6) 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;
7) 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;
8) at surface grinding machine correct grinding end face f to 16 ± 0.05mm;
9) flaw detection, product inspection, cleaning rust-proof packing, warehouse-in.
Claims (2)
1. an Oil pump drive gear processing 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) 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;
3) 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;
4) 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;
5) on broaching machine, draw keyway j, groove width 8 ± 0.01mm, groove depth 3.1+0.2 0mm;
6) 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;
7) 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;
8) at surface grinding machine correct grinding end face f to 16 ± 0.05mm;
9) flaw detection, product inspection, cleaning rust-proof packing, warehouse-in.
2. described Oil pump drive gear processing 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104184433A CN102950439A (en) | 2012-10-27 | 2012-10-27 | Machining process of drive gear of oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104184433A CN102950439A (en) | 2012-10-27 | 2012-10-27 | Machining process of drive gear of oil pump |
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| Publication Number | Publication Date |
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| CN102950439A true CN102950439A (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104184433A Pending CN102950439A (en) | 2012-10-27 | 2012-10-27 | Machining process of drive gear of oil pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511646A (en) * | 2017-09-29 | 2017-12-26 | 徐州翔凯重工科技有限公司 | A kind of processing method of gear |
| CN108953555A (en) * | 2018-09-10 | 2018-12-07 | 台州隆本机械有限公司 | Automotive adjusting arm integrated ratchet and its production technology |
Citations (4)
| 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 |
| EP0549057A1 (en) * | 1991-12-23 | 1993-06-30 | VOLVO CAR SINT-TRUIDEN, naamloze vennootschap | Method for the manufacturing of gear-wheels, gear-wheels thus obtained and gear-wheel pump equipped therewith |
| CN1836814A (en) * | 2005-03-23 | 2006-09-27 | 恩普乐股份有限公司 | Formed gear production method |
| CN101195896A (en) * | 2007-07-25 | 2008-06-11 | 陈政 | Corrosion resistant, high-strength steel alloy for manufacturing principal axis and gear of speed reducing motor |
-
2012
- 2012-10-27 CN CN2012104184433A patent/CN102950439A/en active Pending
Patent Citations (4)
| 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 |
| EP0549057A1 (en) * | 1991-12-23 | 1993-06-30 | VOLVO CAR SINT-TRUIDEN, naamloze vennootschap | Method for the manufacturing of gear-wheels, gear-wheels thus obtained and gear-wheel pump equipped therewith |
| CN1836814A (en) * | 2005-03-23 | 2006-09-27 | 恩普乐股份有限公司 | Formed gear production method |
| CN101195896A (en) * | 2007-07-25 | 2008-06-11 | 陈政 | Corrosion resistant, high-strength steel alloy for manufacturing principal axis and gear of speed reducing motor |
Non-Patent Citations (1)
| Title |
|---|
| 王涛: ""齿轮加工工艺综述"", 《机械管理开发》, 31 December 2011 (2011-12-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511646A (en) * | 2017-09-29 | 2017-12-26 | 徐州翔凯重工科技有限公司 | A kind of processing method of gear |
| CN108953555A (en) * | 2018-09-10 | 2018-12-07 | 台州隆本机械有限公司 | Automotive adjusting arm integrated ratchet and its production technology |
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Application publication date: 20130306 |
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